Portable adjustable eccentric spiral milling device and milling method

Abstract

The present invention discloses a portable adjustable eccentric spiral milling device and a milling method, wherein the main shaft is sleeved with an inner sleeve, the two ends of the inner sleeve are respectively sleeved with a first link and a second link, the outer sides of the first link and the second link are jointly sleeved with an outer sleeve, the outer side of the outer sleeve is provided with an external shock-absorbing mechanism, the 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 circular array, the external shock-absorbing mechanism includes a plurality of friction plates fixedly sleeved with the outer side of the outer sleeve, each of the friction plates is rotatably connected to a friction rail, the outer side of the outer sleeve is also sleeved with a shell, an air bag is provided in the shell and between the friction rail, each group of the internal shock-absorbing mechanism includes a knocking block fixedly arranged on the outer side of the inner sleeve, and a slide rail is provided on the second link. The device solves the problem that the current portable hole milling device is very easy to vibrate when working.

Description

Technical Field

[0001] The invention belongs to the technical field of precision manufacturing, and in particular 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 milling devices, due to their compactness, flexibility, and portability, have become indispensable processing tools in confined spaces and on-site operations. Traditional portable milling devices often adopt lightweight design concepts in pursuit of greater portability during their design process. By selecting lightweight materials and optimizing the structural layout, the overall weight of the equipment is effectively reduced, making it easy for operators to carry and operate, greatly expanding its application range. For example, it plays an important role in scenarios such as on-site maintenance of aircraft and emergency processing on ship decks.

[0003] However, while this lightweight design brings convenience, it also raises new problems. When the equipment performs high-speed milling operations, due to its relatively low structural rigidity and mass, the cutting forces exerting on the equipment can easily cause vibration. High cutting forces are generated between the tool and the workpiece during high-speed milling, and the lightweight structure of the equipment cannot effectively resist these forces, resulting in significant vibration. This vibration not only seriously affects the machining accuracy of the milled hole, increasing dimensional and shape errors, but also causes additional impact and wear on the tool, shortening the tool life and increasing machining costs. Summary of the Invention

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

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a portable adjustable eccentric spiral milling device and a milling method, comprising a main shaft, an inner sleeve being sleeved on the main shaft, a first link and a second link being sleeved on both ends of the inner sleeve, an outer sleeve being sleeved on the outer sides of the first link and the second link, an external shock absorbing mechanism being provided on the outer side of the outer sleeve, and a plurality of groups of internal shock absorbing mechanisms being evenly arranged in a circular array on a side of the second link close to the first link;

[0006] The external shock-absorbing mechanism includes a plurality of friction plates fixedly sleeved on the outside of the outer sleeve, a friction rail being rotatably fitted on the outside of each friction plate, a shell being further sleeved on the outside of the outer sleeve, an air bag being arranged between the shell and the friction rail, a sliding cavity being provided on one side of the friction rail, a sliding push rod being slidably arranged in the sliding cavity, a lifting block being provided on the end of the sliding push rod away from the air bag, the sliding push rod and the lifting block being slidably fitted, a shock-absorbing block being fixedly arranged above the lifting block, and the shock-absorbing block being embedded in the outer wall of the friction rail;

[0007] 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 slidingly 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, it will lift the force-bearing block to slide in the sliding rail, with the inner sleeve as the axis, the knocking block is located on the inside 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 provided in the outer sleeve.

[0008] The present invention further describes that one end of the main shaft is connected to a tool, and the end of the outer sleeve close to the tool is sleeved with a bearing, and the outside of the bearing is also connected to an outer shell. 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 to it extend outside the outer shell, and the shell and the shell are fixedly connected, and the friction rail and the shell 323 are also fixedly connected. The inner sleeve and the outer sleeve are both externally connected to independent drive mechanisms, and an eccentric adjustment mechanism is also integrated in the outer shell.

[0009] The present invention further explains 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 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 to a second slider, the second slider is rotatably connected to the outside of the inner sleeve, the outside of the balance block is sleeved with a liquid balance ring, the interior of the liquid balance ring is a cavity with a trapezoidal cross-section, and three dividing ribs are evenly arranged inside the liquid balance ring.

[0010] The present invention further explains 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, and 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, and 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, and a first hanging ear is fixedly provided on both sides of the force-bearing block, the first hanging ear is hinged to the inner sliding rod, and 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.

[0011] The present invention further describes that the first link and the second link are fixedly arranged inside the outer sleeve.

[0012] The present invention further describes that a plurality of elastic coatings are provided on the shell, a honeycomb elastic member is laid on the outer side of the shell, and the outer side of the honeycomb elastic member is close to the inner side of the outer shell.

[0013] The present invention further describes that hand-held rings are fixedly mounted on two opposite sides of the outer shell.

[0014] The present invention further describes a milling method of a portable adjustable eccentric spiral milling device, which is characterized by comprising:

[0015] 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. The eccentric position of the tool is fine-tuned by the eccentric adjustment mechanism to ensure that the tool can perform eccentric milling according to a predetermined trajectory during the rotation process. At the same time, the dynamic balancing mechanism performs dynamic balancing conditions for this.

[0016] Specifically, when performing eccentric milling, the eccentric motion of the tool will generate centrifugal force. The magnitude of the centrifugal force is related to the eccentricity e, the rotation speed n and the tool mass m. The 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 rotational 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 within the inner sleeve and the outer sleeve, and the first elastic rope and the second elastic rope are connected to the balancing block, so that the tension of the first elastic rope and the second elastic rope changes during rotation, pulling the balancing block to cause shaking or displacement, and the change in the position of the balancing block offsets the influence of the centrifugal force F generated by the eccentric movement of the tool.

[0017] The present invention further states that, while the eccentric hole is being milled, the external shock absorbing mechanism and the internal shock absorbing mechanism simultaneously exert a shock absorbing effect;

[0018] When the driving mechanism drives the outer sleeve to rotate, the friction plate rotates accordingly. The friction plate rotates relative to the friction rail and generates friction, thereby achieving a shock absorption 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 squeezes the friction rail, further increasing the friction between the friction rail and the friction plate, thereby achieving the purpose of improving the friction shock absorption effect.

[0019] When the inner sleeve rotates, the knocking block rotates accordingly. During the rotation, the knocking block contacts several of the 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, the force-bearing block slides inward in the slide rail to its initial state due to the connection action of the connecting assembly.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The vibration during the operation of the device is effectively reduced by setting up an external shock-absorbing mechanism and an internal shock-absorbing mechanism to work together. The external shock-absorbing mechanism uses friction and airbag expansion to enhance friction to achieve shock absorption. The internal shock-absorbing mechanism uses the cooperation of the striking block and the force-bearing block and the connection components to buffer and alleviate vibration, thereby ensuring the stable operation of the device.

[0022] (2) By setting up a dynamic balancing mechanism, the position of the balancing block can be dynamically adjusted according to the change of the centrifugal force generated by the eccentric milling hole through the coordinated action of the slider, elastic rope and balancing block to offset the influence of the centrifugal force and ensure the stability and accuracy of the device during the eccentric milling operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying 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 of the present invention. In the accompanying drawings:

[0024] Figure 1 is a cross-sectional view of the overall structure of an embodiment of the present invention;

[0025] Figure 2 is a partial cross-sectional view of an external shock absorbing mechanism according to an embodiment of the present invention;

[0026] Figure 3 is a schematic diagram of a housing portion of an embodiment of the present invention;

[0027] Figure 4 is a schematic diagram of a honeycomb elastic member according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic structural diagram of the inner sleeve portion of an embodiment of the present invention;

[0029] Figure 6 is an enlarged schematic diagram of region A of an embodiment of the present invention;

[0030] Figure 7 is an enlarged schematic diagram of region B of an embodiment of the present invention;

[0031] Figure 8 is a partial cross-sectional view of an internal shock absorbing mechanism of an embodiment of the present invention;

[0032] Figure 9 is a partial cross-sectional view of a connection assembly according to an embodiment of the present invention;

[0033] Figure 10 is an enlarged schematic diagram of region C of an embodiment of the present invention;

[0034] Figure 11 is a partial cross-sectional view of a liquid balance ring according to an embodiment of the present invention;

[0035] In the figure: 1, main shaft; 2, inner sleeve; 21, dynamic balancing mechanism; 211, first slider; 212, first elastic rope; 213, balancing block; 2131, liquid balancing ring; 2132, separating rib; 214, second elastic rope; 215, second slider; 22, internal shock absorbing mechanism; 221, knocking block; 222, force block; 2221, first hanging ear; 223, connecting assembly; 2231, inner slide rod; 2232, outer slide; 2233, connecting spring; 224, fixed Fixed block; 2241, second hanging ear; 225, elastic block; 3, outer sleeve; 31, first link; 32, external shock-absorbing mechanism; 321, friction plate; 322, friction rail; 3221, sliding cavity; 3222, sliding push rod; 3223, lifting block; 3224, shock-absorbing block; 323, shell; 3231, elastic coating; 3232, honeycomb elastic part; 324, airbag; 33, second link; 331, slide rail; 4, bearing; 5, shell; 6, hand ring; 7, tool. DETAILED DESCRIPTION

[0036] The following is a non-limiting detailed description of the technical solutions of the present invention in conjunction with preferred embodiments and the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0037] refer to Figures 1 to 11 , an embodiment of the present invention provides a portable adjustable eccentric spiral milling device, such as Figure 1 As shown, the portable adjustable eccentric spiral milling device and milling method include a main shaft 1, an inner sleeve 2 is sleeved on the main shaft 1, and the two ends of the inner sleeve 2 are sleeved with a first link 31 and a second link 33 respectively, the outer sides of the first link 31 and the second link 33 are jointly sleeved with an outer sleeve 3, and the outer side of the outer sleeve 3 is provided with an external shock-absorbing mechanism 32, and the second link 33 is close to the first link 31. A plurality of groups of internal shock-absorbing mechanisms 22 are evenly arranged in a circular array on the side.

[0038] like Figure 2 and Figure 10 As shown, the external shock-absorbing mechanism 32 includes a plurality of friction plates 321 fixedly mounted on the outside of the outer sleeve 3. Each friction plate 321 is rotatably connected to a friction rail 322. A housing 323 is also mounted on the outside of the outer sleeve 3. An airbag 324 is disposed between the housing 323 and the friction rail 322. A sliding cavity 3221 is defined on one side of the friction rail 322. A sliding push rod 3222 is slidably disposed within the sliding cavity 3221. A lifting block 3223 is disposed on the end of the sliding push rod 3222 away from the airbag 324. The sliding push rod 3222 and the lifting block 3223 slidably engage. A shock-absorbing block 3224 is fixedly mounted above the lifting block 3223 and embedded in the outer wall of the friction rail 322.

[0039] When no external force is applied, 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. Friction occurs while the friction plate 321 rotates relative to the friction rail 322, so that the vibration energy is partially converted into friction heat energy, thereby achieving a shock absorption effect. The heat generated by the relative friction between the two is transferred to the airbag 324, and the gas in the airbag 324 will gradually expand. The expansion of the airbag 324 causes the friction rail 322 to be squeezed, which will further enhance the friction between the friction rail 322 and the friction plate 321, thereby achieving the purpose of further improving the friction shock absorption effect.

[0040] As the airbag 324 expands, the airbag 324 can follow the direction of the internal pressure, accurately transmitting the thrust generated by the expansion to the sliding push rod 3222, pushing it toward the lifting block 3223. The sliding push rod 3222 and the lifting block 3223 adopt a structural design with inclined surfaces. Specifically, the end of the sliding push rod 3222 is carefully machined to form an inclined surface with a precise angle, and the contact area of ​​the lifting block 3223 and the sliding push rod 3222 is also machined with a matching inclined surface. In the initial state, these two inclined surfaces are partially and tightly fitted, but no relative movement occurs.

[0041] As the sliding push rod 3222 slides linearly, the two inclined surfaces begin to move relative to each other. Based on the mechanical principles of inclined surface friction and motion, as the sliding push rod 3222 moves along its axis, its inclined surface exerts a force component perpendicular to the inclined surface of the lifting block 3223. This force component can be decomposed into two directions: one direction parallel to the direction of movement of the lifting block 3223, attempting to push the lifting block 3223 along its own track; the other direction perpendicular to the mounting plane of the lifting block 3223, i.e., the upward lifting direction. Because the lifting block 3223 is confined to the vertical track and cannot move freely in a direction parallel to its track, the force component perpendicular to the mounting plane becomes the dominant force, prompting the lifting block 3223 to overcome gravity and any slight frictional resistance, move upward in the vertical direction, and eject the shock absorbing block 3224 on it. After being ejected, the shock-absorbing block 3224 can fully exert its shock-absorbing effect, absorb vibration 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 absorption performance.

[0042] like Figure 7 and Figure 8 As shown, each group of the internal shock absorbing mechanism 22 includes a knocking block 221 fixedly arranged on the outside of the inner sleeve 2, and a sliding rail 331 is provided on the second link 33. A force block 222 is slidingly arranged in the sliding rail 331. The knocking block 221 and the force block 222 are both provided with matching inclined surfaces, that is, when the knocking block 221 rotates, it will lift the force block 222 to slide in the sliding rail 331 (the principle of relative sliding cooperation between the two inclined surfaces is the same as the cooperation principle of the above-mentioned sliding push rod 3222 and the lifting block 3223). With the inner sleeve 2 as the axis, the knocking block 221 is located on the inner side of the force-bearing block 222, and fixed blocks 224 are provided on the opposite sides of the force-bearing block 222. A connecting component 223 is connected between the force-bearing block 222 and each of the fixed blocks 224. An elastic block 225 is provided on the outer side of the force-bearing block 222, and the elastic block 225 is fixedly set in the outer sleeve 3.

[0043] When the inner sleeve 2 rotates, the knocking block 221 will rotate synchronously therewith. During the rotation process, the knocking block 221 contacts the several force blocks 222 on the outside in a circular motion trajectory. The force blocks 222 produce a lifting effect. The force blocks 222 slide outward in the slide rail 331. The force blocks 222 push upward on the elastic block 225. Since the elastic block 225 is elastic, it can alleviate vibration. The lifting of the force block 222 is a gradual process. The vibration energy is gradually dispersed and transmitted during the inclined contact and relative sliding process between the knocking block 221 and the force block 222. This gradual energy transfer method avoids the energy from being concentrated on the elastic block 225 instantly, making the impact force borne by the elastic block 225 more uniform and moderate, thereby effectively extending the service life of the elastic block 225 and ensuring the durability and stability of the shock absorption effect.

[0044] Specifically, when the knocking block 221 rotates with the inner sleeve 2 and contacts the force block 222, the knocking block 221 applies a component force upward along the inclined surface to the force block 222. At the same time, the force block 222 generates a reaction force on the striking block 221 , according to Newton's third law, = This upward component along the slope Can be decomposed into horizontal force components and the vertical component ,in The force bearing block 222 slides upward in the slide rail 331, and The force will be balanced under the constraints of the slide rail 331. During the relative sliding of the striking block 221 and the inclined surface of the force-bearing block 222, the presence of the inclined surface provides a certain buffering effect on the force transmission. As the striking block 221 rotates, its contact position with the force-bearing block 222 continuously changes, and the angle of the inclined surface gradually changes the direction and magnitude of the force, thereby achieving a gradual release and buffering of energy.

[0045] In certain preferred embodiments, Figures 1 to 3As shown, one end of the spindle 1 is connected to a tool 7, and the end of the outer sleeve 3 near the tool 7 is sleeved with a bearing 4. The outer side of the bearing 4 is also connected to the outer side of the housing 5. The spindle 1, the inner sleeve 2, the outer sleeve 3, the external shock-absorbing mechanism 32, and the internal shock-absorbing mechanism 22 are all located inside the housing 5. One end of the spindle 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 a relief for the housing 323 is provided on the airbag 324, while ensuring that the airbag 324 is airtight. The tool 7 is used to perform tasks such as milling holes. The bearing 4 provides support for the relative rotation between the outer sleeve 3 and the housing 5, reducing friction and wear and ensuring the smooth operation of the device.

[0046] The inner sleeve 2 and the outer sleeve 3 are both externally connected to independent drive mechanisms that can independently control the rotation and feed motion of the inner sleeve 2 and the outer sleeve 3, respectively, providing the device with diverse motion modes and power support to accommodate different processing requirements. The outer shell 5 also incorporates an eccentricity adjustment mechanism that can precisely adjust the eccentricity of the tool 7, thereby changing the cutting trajectory and cutting depth of the tool 7 during processing and achieving more precise processing control. The drive and eccentricity adjustment mechanisms are both prior art and will not be further described here.

[0047] In certain preferred embodiments, Figure 1 、 Figure 6 Hehe Figure 11 As shown, a dynamic balancing mechanism 21 is rotatably disposed between the inner sleeve 2 and the outer sleeve 3. The dynamic balancing 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 cord 212. The other end of the first elastic cord 212 is connected to one side of a balancing block 213. The other side of the balancing block 213 is connected to one end of a second elastic cord 214. The other end of the second elastic cord 214 is connected to a second slider 215. The second slider 215 is rotatably connected to the outer side of the inner sleeve 2. A liquid balancing ring 2131 is sleeved on the outer side of the balancing block 213. The interior of the liquid balancing ring 2131 has a trapezoidal cross-section and is evenly distributed with three dividing ribs 2132.

[0048] When an eccentric milling operation is performed, centrifugal force is generated, and this centrifugal force is transmitted to the dynamic balancing mechanism 21 through the inner sleeve 2 and the outer sleeve 3. 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 generated centrifugal force is offset by the change in position of the balancing block 213.

[0049] The interior of the liquid balance ring 2131 is divided into three independent cavities by the separation ribs 2132. The liquid in the liquid balance ring 2131 helps suppress liquid resonance, avoiding balancing failure or instability caused by resonance. The synergistic action of the three independent cavities also achieves precise compensation for centrifugal forces in multiple directions and angles. The trapezoidal cross-section of the interior of the liquid balance ring 2131 helps reduce liquid eddy currents. When the balance weight 213 is adjusted in position under the tension of the elastic cord, the liquid within the liquid balance ring 2131 dynamically migrates within each cavity based on the centrifugal force applied to each cavity. The liquid migration in the three cavities is both interrelated and independent, enabling precise adjustment of the position and pressure distribution of the liquid within the annular cavity based on the actual centrifugal force distribution, thereby generating a balancing force equal in magnitude and opposite in direction to the centrifugal force. The integrated movement of the liquid balance ring 2131 and the balance weight 213 complements each other, enabling the entire dynamic balancing mechanism 21 to more accurately offset centrifugal forces of varying directions and magnitudes, significantly improving balancing accuracy and ensuring smooth operation of the inner sleeve 2 and outer sleeve 3 during eccentric milling operations.

[0050] In certain preferred embodiments, Figure 8 and Figure 9As shown, the connecting assembly 223 includes an inner slide rod 2231, which is a combined cylindrical structure consisting of a flat large-diameter cylinder and a slender small-diameter cylinder. The slender small-diameter cylinder in the inner slide rod 2231 is slidably connected to an outer slide cylinder 2232, and the outer slide cylinder 2232 is a combination of a flat large-diameter cylinder and a small-diameter barrel-shaped structure. The slender small-diameter cylinder in the inner slide rod 2231 and the small-diameter barrel-shaped structure in the outer slide cylinder 2232 are slidably matched, and a connecting spring 2233 is commonly connected between the flat large-diameter cylinder of the inner slide rod 2231 and the flat large-diameter cylinder of the outer slide cylinder 2232. A first hanging ear 2221 is fixedly provided on both sides of the force-bearing block 222 , and the first hanging ear 2221 is hinged to the inner slide rod 2231 . A second hanging ear 2241 is fixedly provided on one side of the fixed block 224 , and the second hanging ear 2241 is hinged to the outer slide cylinder 2232 .

[0051] While the force-bearing block 222 slides within the slide rail 331, the inner slide rod 2231 and the outer slide cylinder 2232 within the connecting assembly 223 slide relative to each other, and the connecting spring 2233 deforms and makes adaptive adjustments to stabilize the sliding. During this process, the connecting spring 2233, on the one hand, provides a certain buffer for the sliding of the force-bearing block 222 through its own elastic force, further reducing the vibration and instability 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 after completing the lifting action when there is no external force, ensuring that the entire device can cycle stably and orderly during the continuous knocking movement, thereby ensuring the reliability and stability of the overall operation of the device.

[0052] In certain preferred embodiments, Figure 1 As shown, the first link 31 and the second link 33 are fixedly arranged inside the outer sleeve 3 .

[0053] In certain preferred embodiments, Figure 3 and Figure 4 As shown, the shell 323 is provided with a plurality of elastic coatings 3231. The outer side of the shell 323 is provided with a honeycomb elastic member 3232, the outer side of which is close to the inner side of the outer shell 5. When the gas in the airbag 324 expands due to heat and exerts excessive pressure on the friction rail 322, the airbag 324 squeezes the elastic coating 3231 outward, causing it to bulge outward. The honeycomb elastic member 3232, with its unique honeycomb structure, can disperse and absorb the pressure transmitted from the elastic coating 3231, while effectively buffering and alleviating vibrations, ensuring stable operation of the device.

[0054] In some preferred embodiments, hand-held rings 6 are fixedly mounted on opposite sides of the outer shell 5, which facilitates hand-held operation by workers.

[0055] In the above embodiment, the milling method of the portable adjustable eccentric spiral milling device is characterized by comprising:

[0056] The driving mechanism of the inner sleeve 2 and the outer sleeve 3 is started, so that the spindle 1 drives the tool 7 to start rotating, and the rotation speed is adjusted according to the preset parameters. The eccentric position of the tool 7 is fine-tuned by the eccentric adjustment mechanism to ensure that the tool 7 can perform eccentric milling according to the predetermined trajectory during the rotation process. At the same time, the dynamic balancing mechanism 21 performs dynamic balancing conditions for this.

[0057] Specifically, while performing eccentric milling, the eccentric motion of the tool 7 generates 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 is related to the 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 within 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. During the rotation, the tension of the first elastic rope 212 and the second elastic rope 214 changes, pulling the balancing block 213 to cause shaking or displacement, and the change in the position of the balancing block 213 offsets the influence of the centrifugal force F generated by the eccentric movement of the tool 7.

[0058] 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;

[0059] When the driving mechanism drives the outer sleeve 3 to rotate, the friction plate 321 rotates accordingly. The friction plate 321 rotates relative to the friction rail 322 and generates friction, thereby achieving a shock absorption 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 squeezes the friction rail 322, further increasing the friction between the friction rail 322 and the friction plate 321, thereby achieving the purpose of improving the friction shock absorption effect.

[0060] When the inner sleeve 2 rotates, the knocking block 221 rotates accordingly. During the rotation, the knocking block 221 contacts the several force blocks 222 on the outside in turn according to the circular motion trajectory, and produces an upward lifting effect. The force block 222 slides outward in the slide rail 331, and the force block 222 presses upward on the elastic block 225. Since the elastic block 225 is elastic, it can relieve vibration. When the knocking block 221 is relatively disengaged from the force block 222, due to the connecting action of the connecting component 223, the force block 222 slides inward in the slide rail 331 to the initial state.

[0061] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only used to facilitate the description of the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0062] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will appreciate that modifications may be made to the technical solutions described in the aforementioned embodiments, or that some of the technical features may be replaced with equivalents. Such modifications or replacements do not 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: An inner sleeve is sleeved on the main shaft, and a first link and a second link are sleeved on both ends of the inner sleeve respectively. The outer sides of the first link and the second link are sleeved on an outer sleeve together, and an external shock-absorbing mechanism is provided on the outer side of the outer sleeve. A plurality of groups of internal shock-absorbing mechanisms are evenly arranged in a circumferential array on a side of the second link close to the first link. The external shock-absorbing mechanism includes a plurality of friction plates fixedly sleeved on the outside of the outer sleeve, a friction rail being rotatably fitted on the outside of each friction plate, a shell being further sleeved on the outside of the outer sleeve, an air bag being arranged between the shell and the friction rail, a sliding cavity being provided on one side of the friction rail, a sliding push rod being slidably arranged in the sliding cavity, a lifting block being provided on the end of the sliding push rod away from the air bag, the sliding push rod and the lifting block being slidably fitted, a shock-absorbing block being fixedly arranged above the lifting block, and the shock-absorbing block being 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 provided 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 inside of the force-bearing block, fixed blocks are provided on both sides of the opposite sides of the force-bearing block, a connecting assembly 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 provided in the outer sleeve; 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 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 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 balance block, the cavity cross-section of the liquid balancing ring is trapezoidal, and three dividing ribs are evenly arranged inside the liquid balancing ring.

2. A portable adjustable eccentric spiral milling device according to claim 1, characterized in that: One end of the main shaft is connected to a tool, and the end of the outer sleeve close to the tool is sleeved with a bearing, and the outer side of the bearing is also connected to a shell. 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 shell. One end of the main shaft and the tool connected to it extend outside the shell, and the shell and the shell are fixedly connected, and the friction rail and the shell are also fixedly connected. The inner sleeve and the outer sleeve are both externally connected to independent drive mechanisms, and an eccentric adjustment mechanism is also integrated in the shell.

3. A portable adjustable eccentric spiral milling device according to claim 2, 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, and 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, and 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, and a first hanging ear is fixedly provided on both sides of the force-bearing block, the first hanging ear is hinged to the inner sliding rod, and 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.

4. A portable adjustable eccentric spiral milling device according to claim 3, characterized in that: The first link and the second link are fixedly arranged inside the outer sleeve.

5. The portable adjustable eccentric spiral milling device according to claim 4, characterized in that: The shell is provided with a plurality of elastic coating layers, the outer side of the shell is paved with a honeycomb elastic piece, and the outer side of the honeycomb elastic piece is close to the inner side of the outer shell.

6. The portable adjustable eccentric spiral milling device according to claim 5, characterized in that: Hand-holding rings are fixedly mounted on opposite sides of the outer shell.

7. A milling method according to any one of claims 1 to 6, 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. The eccentric position of the tool is fine-tuned by the eccentric adjustment mechanism to ensure that the tool can perform eccentric milling according to a predetermined trajectory during the rotation process. 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 the centrifugal force is related to the eccentricity e, the rotation speed n and the tool mass m. The 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 rotational 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 within 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 rotation, pulling the balancing block to cause shaking or displacement, and offsetting the influence of the centrifugal force F generated by the eccentric movement of the tool through the change in the position of the balancing block.

8. The method according to claim 7, wherein: 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. The friction plate rotates relative to the friction rail and generates friction, thereby achieving a shock absorption 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 squeezes the friction rail, further increasing 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, the knocking block contacts several of the 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, the force-bearing block slides inward in the slide rail to its initial state due to the connection action of the connecting assembly.

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