A cutting device

Abstract

The utility model provides a kind of cutting device, the cutting device includes: support and cutting mechanism, switching mechanism and rotating mechanism connected to the support;Wherein, the cutting mechanism includes cutting blade, the cutting blade has cavity, the cavity is used to accommodate to be cut material, cutting blade is equipped with the cutting part of the cavity towards, the cutting mechanism is connected to the switching mechanism;The rotating mechanism is connected with the switching mechanism, and the rotating mechanism is used to drive the switching mechanism rotation;The switching mechanism can be moved relative to the rotating mechanism, to make the center of the switching mechanism and the rotating mechanism rotation axis center between concentric state and eccentric state switching, wherein, in the concentric state, the center of the switching mechanism and the rotating mechanism rotation axis center coincide;In the eccentric state, the center of the switching mechanism deviates from the rotating mechanism rotation axis center.

Description

Technical Field

[0001] This application belongs to the field of air conditioning technology, specifically relating to a cutting device. Background Technology

[0002] In the field of air conditioning and refrigeration, the condenser is the core component of the air conditioner. The condenser uses U-shaped copper tubes to transport refrigerant, and the quality of the copper tubes directly affects the quality level of the condenser.

[0003] U-shaped copper tubes need to be cut and bent during processing. Currently, the existing cutting method for U-shaped copper tubes is fixed-station external rotation copper tube cutting. The cutter head is equipped with blades, and the copper tube is fixed on the cutter head and pressed by the blades. The cutter head rotates concentrically relative to the copper tube, so that the blades rotate around the copper tube to perform pressing cut.

[0004] Copper tubes cut using this method often have radially protruding burrs at the cut end due to the high pressure applied by the blade. As processing time increases and the blade wears out, this condition becomes more and more pronounced. Furthermore, the internal blade structure is too complex and the cost is too high. Utility Model Content

[0005] This invention provides a cutting device that aims to solve the problems of numerous burrs and complex cutter head structure in copper tubes cut by concentric rotation in the prior art.

[0006] This utility model embodiment provides a cutting device, which includes: a support, and a cutting mechanism, a switching mechanism, and a rotating mechanism connected to the support; wherein,

[0007] The cutting mechanism includes a cutting blade with a cavity for accommodating the material to be cut. The cutting blade has a cutting section facing the cavity. The cutting mechanism is connected to the switching mechanism.

[0008] The rotating mechanism is connected to the switching mechanism, and the rotating mechanism is used to drive the switching mechanism to rotate.

[0009] The switching mechanism is movable relative to the rotating mechanism, so that the center of the switching mechanism and the rotation axis center of the rotating mechanism switch between a concentric state and an eccentric state. In the concentric state, the center of the switching mechanism and the rotation axis center of the rotating mechanism coincide, the rotating mechanism drives the switching mechanism to rotate concentrically, and the cutting mechanism is stationary relative to the support. In the eccentric state, the center of the switching mechanism deviates from the rotation axis center of the rotating mechanism, the rotating mechanism drives the switching mechanism to rotate eccentrically, and drives the cutting blade of the cutting mechanism to rotate eccentrically relative to the material to be cut, so that the cutting part in the cutting blade cuts the material to be cut.

[0010] Optionally, the switching mechanism includes an eccentric seat, which includes an inclined segment and a straight segment arranged at an angle. The inclined segment is slidably connected to the rotating mechanism and inclined relative to the rotation axis center of the rotating mechanism. The straight segment is rollably connected to the cutting mechanism. The inclined segment can move relative to the rotating mechanism along the inclined direction of the inclined segment, so that the center of the straight segment and the rotation axis center of the rotating mechanism can switch between a concentric state and an eccentric state.

[0011] In the concentric state, the center of the straight segment coincides with the center of the rotation axis of the rotating mechanism, and the rotating mechanism drives the straight segment to rotate concentrically, while the cutting mechanism remains stationary relative to the support. In the eccentric state, the center of the straight segment deviates from the center of the rotation axis of the rotating mechanism, and the rotating mechanism drives the straight segment of the switching mechanism to rotate eccentrically, thereby causing the cutting blade of the cutting mechanism to rotate eccentrically relative to the material to be cut, so that the cutting part in the cutting blade cuts the material to be cut.

[0012] Optionally, the rotating mechanism includes a collar connected to the bracket, one end of the collar being provided with a shaft retainer, the collar and the shaft retainer having the same rotation axis center, the collar having a receiving cavity, the shaft retainer having a first through hole communicating with the receiving cavity, and the rotation axis centers of the collar and the shaft retainer passing through the first through hole;

[0013] The straight segment of the eccentric seat passes through the first through hole, and the inclined segment is located in the receiving cavity. The size of the first through hole in the radial direction of the shaft retainer is larger than the size of the straight segment, so that the straight segment can move radially in the first through hole along the shaft retainer. The center of the straight segment switches between a concentric state and an eccentric state with the rotation axis center of the collar and the shaft retainer.

[0014] In the concentric state, the center of the straight line segment coincides with the rotation axis center of the collar and the shaft retainer; in the eccentric state, the center of the straight line segment deviates from the rotation axis center of the collar and the shaft retainer.

[0015] Optionally, the switching mechanism further includes a push plate, which is connected to the bracket and movable relative to the bracket, and the push plate is connected to the eccentric seat.

[0016] Optionally, the switching mechanism further includes:

[0017] The connecting sleeve includes a first body sleeved on the collar and a second body located in the receiving cavity. The second body is provided with at least one connecting part. The outer circumferential surface of the collar is provided with at least one second through hole. The second through hole communicates with the receiving cavity. The connecting part passes through the second through hole and is connected to the first body. The first body is connected to the push plate. The connecting sleeve can move along the axial direction of the collar under the drive of the push plate.

[0018] A swing shaft is located within the receiving cavity and can move along the receiving cavity. The swing shaft is connected to the second body. One end of the swing shaft facing the first through hole has a first channel inclined to the center of the rotation axis of the collar. The first channel matches the inclined section. The inclined section of the eccentric seat is disposed in the first channel and can slide along the first channel.

[0019] Optionally, there are two eccentric seats and two collars, which are symmetrically arranged on both sides of the push plate. One eccentric seat is connected to one collar, and the cutting mechanism is connected between the two eccentric seats.

[0020] Optionally, the rotating mechanism further includes a first driving member, a timing belt, and a timing pulley. The first driving member is connected to the bracket and is connected to one of the timing pulleys. One of the collars is connected to one of the timing pulleys, and the timing belt is wound around the timing pulleys to make the two collars rotate synchronously.

[0021] Optionally, the switching mechanism further includes a second driving member, a gear, a rack, and a slide rail connected to the bracket. The second driving member is connected to the gear, the gear meshes with the rack, the rack is connected to the push plate, and the push plate is slidably disposed on the slide rail. The second driving member is used to drive the gear to rotate, so that the rack pushes the push plate to slide along the slide rail.

[0022] Optionally, a first locking part is provided at the position where the straight segment and the inclined segment connect, and a second locking part is provided at the edge of the first through hole. The first locking part and the second locking part cooperate to restrict the movement of the eccentric seat along the axial direction of the collar.

[0023] Optionally, the cutting mechanism further includes a cutting head, and the number of cutting blades is multiple, with the multiple cutting blades spaced apart on the cutting head, and the cutting head is connected to the switching mechanism.

[0024] This invention provides a cutting device for cutting copper tubes. It employs an internal rotation cutting method, where the cutting part of the cutting blade is located on its inner surface. The copper tube remains stationary, while the cutting blade rotates eccentrically around the center of the tube to perform the cutting. A switching mechanism can move relative to the rotating mechanism, allowing it to be concentric or eccentric with the rotating mechanism, and transmitting this concentric or eccentric state to the cutting mechanism, thus switching the cutting mechanism between concentric and eccentric states. Cutting is achieved through the contact between the inner surface of the cutting blade and the outer surface of the copper tube. This larger contact area reduces excessive local pressure on the copper tube, which helps reduce burrs at the tube end. Furthermore, the cutting mechanism has a simple structure and low manufacturing and maintenance costs.

[0025] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0027] Figure 1 This is a front view of the cutting device according to an embodiment of the present utility model;

[0028] Figure 2 This is a schematic diagram of the movement of the cutting blade relative to the material to be cut according to an embodiment of the present utility model;

[0029] Figure 3 This is a three-dimensional structural schematic diagram of the cutting device according to an embodiment of the present utility model;

[0030] Figure 4 This is a side view of the cutting device according to an embodiment of the present utility model;

[0031] Figure 5 This is a cross-sectional view of the cutting device according to an embodiment of the present utility model;

[0032] Figure 6 This is a top view of the cutting device according to an embodiment of the present utility model.

[0033] Reference numerals: 1: bracket; 2: cutting mechanism; 21: cutting blade; 211: cutting section; 22: cutting head; 23: bearing; 3: switching mechanism; 31: eccentric seat; 32: swing shaft; 321: first channel; 33: connecting sleeve; 34: push plate; 35: second driving component; 36: gear; 37: rack; 38: slide rail; 39: pressure plate; 4: rotating mechanism; 41: collar; 411: receiving cavity; 412: second through hole; 42: shaft retainer; 421: first through hole; 43: first driving component; 44: synchronous belt; 45: synchronous pulley; 46: rotary cutting spindle; 47: base. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the fixed scope of the present utility model.

[0035] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0036] This utility model provides a cutting device, which includes: a support 1, and a cutting mechanism 2, a switching mechanism 3, and a rotating mechanism 4 connected to the support 1; wherein, the cutting mechanism 2 includes a cutting blade 21, the cutting blade 21 having a cavity for accommodating the material to be cut, and the cutting blade 21 having a cutting portion 211 facing the cavity; the cutting mechanism 2 is connected to the switching mechanism 3; the rotating mechanism 4 is connected to the switching mechanism 3 and is used to drive the switching mechanism 3 to rotate; the switching mechanism 3 can move relative to the rotating mechanism 4 so that the center of the switching mechanism 3 and the rotation axis center of the rotating mechanism 4 can switch between a concentric state and an eccentric state; wherein, in the concentric state, the center of the switching mechanism 3 and the rotation axis center of the rotating mechanism 4 coincide, the rotating mechanism 4 drives the switching mechanism 3 to rotate concentrically, and the cutting mechanism 2 is stationary relative to the support 1; in the eccentric state, the center of the switching mechanism 3 deviates from the rotation axis center of the rotating mechanism 4, the rotating mechanism 4 drives the switching mechanism 3 to rotate eccentrically, and drives the cutting blade 21 of the cutting mechanism 2 to rotate eccentrically relative to the material to be cut, so that the cutting portion 211 in the cutting blade 21 cuts the material to be cut.

[0037] In this embodiment, an internal rotation copper tube cutting method is adopted. The cutting blade 21 is tubular, and the cutting part 211 of the cutting blade 21 is located on the inner surface of the cutting blade 21. During cutting, the copper tube to be cut is fixed in the cavity inside the cutting blade 21, and the position to be cut is aligned with the cutting part 211. The copper tube remains stationary, and the cutting head 22 rotates eccentrically around the central axis of the copper tube, so that each position on the outer surface of the copper tube is tangent to the inner surface of the cutting blade 21 in sequence, and the cutting part 211 on the inner surface cuts the copper tube.

[0038] Figure 2 The diagram illustrates the motion of the cutting blade 21 rotating around the copper tube with varying degrees of eccentricity. When the cutting blade 21 and the copper tube are concentric, their central axes coincide, and the cutting blade 21 does not contact the copper tube; feeding and unloading occur in this concentric state. When the cutting blade 21 and the copper tube are eccentric, the copper tube remains stationary, while the cutting blade 21 deviates, causing its central axis to deviate from the copper tube's central axis. The geometric center of the cutting blade 21 does not coincide with its rotation center, resulting in eccentric rotation. When the cutting blade 21 deviates to the point of tangency with the copper tube, it begins to cut the copper tube. Gradually increasing the deviance of the cutting blade 21, as the degree of eccentricity increases, the distance between the cutting blade 21 and the copper tube decreases during rotation, and the cutting depth gradually increases until the copper tube is completely severed, thus completing the cutting process.

[0039] Furthermore, in this embodiment, a rotating mechanism 4 is provided to drive the cutting mechanism 2 to rotate. The cutting mechanism 2 is indirectly connected to the rotating mechanism 4 through a switching mechanism 3. The rotating mechanism 4 has a rotating shaft and rotates around the rotating shaft. The switching mechanism 3 is slidably connected to the rotating mechanism 4 and rolledly connected to the cutting mechanism 2. The switching mechanism 3 rotates under the drive of the rotating mechanism 4 and can move relative to the rotating mechanism 4 to change the motion form of the switching mechanism 3. The displacement of the cutting mechanism 2 relative to the rotating mechanism 4 is transmitted to the cutting mechanism 2 through the rolling connection. The concentricity or eccentricity of the cutting mechanism 2 relative to the rotating mechanism 4 is consistent with the concentricity and eccentricity of the cutting mechanism 2 relative to the copper tube. Therefore, the positional relationship between the cutting mechanism 2 and the copper tube can be changed by adjusting the positional relationship between the cutting mechanism 2 and the rotating mechanism 4.

[0040] When the center of the switching mechanism 3 coincides with the center of the rotation axis of the rotating mechanism 4, the switching mechanism 3 rotates around its center under the drive of the rotating mechanism 4. The rotation of the switching mechanism 3 is not transmitted to the cutting mechanism 2, and the cutting mechanism 2 remains stationary relative to the support 1 and the fixed copper tube. When the center of the switching mechanism 3 deviates from the center of the rotation axis of the rotating mechanism 4, the center of the cutting mechanism 2 also deviates from the center of the copper tube. The switching mechanism 3 rotates eccentrically around a point outside its center, causing the cutting mechanism 2 to move eccentrically around the copper tube, thus achieving the purpose of rotating and cutting the copper tube.

[0041] Compared to the existing external rotation cutting method, this embodiment of the invention changes the structure of the cutting blade 21 and its movement when cutting the copper tube. Instead of the blade head rotating concentrically relative to the copper tube and rolling along the outer surface for external cutting, the blade is now annularly fitted around the copper tube and performs eccentric rotation for internal cutting around the center of the tube. This results in a larger contact area between the cutting blade 21 and the copper tube during cutting, reducing excessive local pressure on the tube and minimizing burrs at the tube opening. Furthermore, the cutting mechanism 2 has a simple structure and lower manufacturing and maintenance costs.

[0042] In addition, in some optional embodiments, the cutting mechanism 2 further includes a cutting head 22, and there are multiple cutting blades 21. The multiple cutting blades 21 are spaced apart on the cutting head 22, and the cutting head 22 is connected to the switching mechanism 3.

[0043] The existing external rotary cutting head 22 moves by rotating around an axis. When cutting multiple copper tubes simultaneously, multiple cutting heads 22 are required, and each cutting head 22 has a coaxially arranged rotating mechanism 4 to drive the cutting head 22 to rotate, which makes the structure relatively complex.

[0044] In this embodiment, a plurality of cutting blades 21 are spaced apart on the cutting head 22, and each cutting blade 21 can independently cut a copper tube. When the switching mechanism 3 drives the cutting mechanism 2 to rotate eccentrically, the entire cutting head 22 moves with the switching mechanism 3, and the plurality of cutting blades 21 on the cutting head 22 rotate eccentrically synchronously. Only one set of rotating mechanism 4 and one set of switching mechanism 3 are needed to enable multiple cutting blades 21 to cut simultaneously, and the cutting blades 21 can be set at any position on the cutting head 22. Compared with the prior art, this greatly reduces the number of cutting heads and rotating mechanisms 4, simplifies the structure, and reduces manufacturing costs.

[0045] In some optional embodiments, the switching mechanism 3 includes an eccentric seat 31, which includes an inclined section and a straight section arranged at an angle. The inclined section is slidably connected to the rotating mechanism 4 and inclined relative to the rotation axis center of the rotating mechanism 4. The straight section is rolledly connected to the cutting mechanism 2. The inclined section can move relative to the rotating mechanism 4 along the inclined direction of the inclined section, so that the center of the straight section and the rotation axis center of the rotating mechanism 4 switch between a concentric state and an eccentric state. In the concentric state, the center of the straight section and the rotation axis center of the rotating mechanism 4 coincide, and the rotating mechanism 4 drives the straight section to rotate concentrically, while the cutting mechanism 2 remains stationary relative to the support 1. In the eccentric state, the center of the straight section deviates from the rotation axis center of the rotating mechanism 4, and the rotating mechanism 4 drives the straight section of the switching mechanism 3 to rotate eccentrically, and drives the cutting blade 21 of the cutting mechanism 2 to rotate eccentrically relative to the material to be cut, so that the cutting part 211 in the cutting blade 21 cuts the material to be cut.

[0046] In this embodiment, the switching between concentric and eccentric states is achieved through an eccentric seat 31. The eccentric seat 31 includes an inclined section and a straight section. The inclined section is inclined relative to the rotation axis center of the rotating mechanism 4, and the straight section is parallel to the rotation axis of the rotating mechanism 4. The inclined section is slidably disposed in the rotating mechanism 4, and can generate relative motion along the inclined direction in the rotating mechanism 4. The motion along the inclined direction can be decomposed into axial and radial displacements along the rotating mechanism 4, and the displacements are transmitted to the straight section. The radial displacement of the straight section causes the center of the straight section to move closer to or further away from the rotation axis center of the rotating mechanism 4, thereby realizing the switching between the concentric and eccentric states. The straight section is rollingly connected to the cutting mechanism 2 through a bearing 23. When the straight section rotates eccentrically, it can drive the cutting mechanism 2 to rotate synchronously.

[0047] In some alternative embodiments, the rotating mechanism 4 includes a collar 41 connected to the bracket 1. One end of the collar 41 is provided with a shaft retainer 42. The collar 41 and the shaft retainer 42 have the same rotation axis center. The collar 41 has a receiving cavity 411. The shaft retainer 42 has a first through hole 421 communicating with the receiving cavity 411. The rotation axis centers of the collar 41 and the shaft retainer 42 pass through the first through hole 421. The straight section of the eccentric seat 31 passes through the first through hole 421, and the inclined section... Located within the receiving cavity 411, the first through hole 421 has a radial dimension larger than that of the straight segment in the shaft retainer 42, so that the straight segment can move radially in the first through hole 421 along the shaft retainer 42. The center of the straight segment switches between a concentric state and an eccentric state with the rotation axis center of the collar 41 and the shaft retainer 42. In the concentric state, the center of the straight segment coincides with the rotation axis center of the collar 41 and the shaft retainer 42. In the eccentric state, the center of the straight segment deviates from the rotation axis center of the collar 41 and the shaft retainer 42.

[0048] In practical applications, the rotating mechanism 4 consists of a base 47, a rotary cutting spindle 46, a collar 41, and a shaft retainer 42. The base 47 is fixed on the bracket 1, and the rotary cutting spindle is rotatably connected to the base 47. The rotary cutting spindle 46, the collar 41, and the shaft retainer 42 are fixed by screws and rotate together around the rotating axis. The collar 41 is a hollow structure with an internal cavity 411 for accommodating the eccentric seat 31, and the inclined section of the eccentric seat 31 can move within the cavity 411. The straight section of the eccentric seat 31 extends from the first through hole 421 on the shaft retainer 42 and is connected to the cutting mechanism 2.

[0049] The first through hole 421 is an elongated hole, and the straight segment is cylindrical, allowing the straight segment to move along its length within the first through hole 421. The first through hole 421 passes through the center of the shaft retainer 42. When the straight segment moves within the first through hole 421, there is a position where the center of the straight segment coincides with the center of the shaft retainer 42, i.e., the center of the rotating shaft. At this point, the entire cutting device is in a concentric state. When the straight segment deviates from this position, the entire cutting device is in an eccentric state.

[0050] Furthermore, different positions of the first through hole 421 correspond to different degrees of eccentricity. The distance the straight segment of the switching mechanism 3 moves through the first through hole 421 during displacement can be determined based on the correspondence between the position and the degree of eccentricity of the first through hole 421. For example... Figure 5 As shown, the first through holes 421 are asymmetrically distributed on the shaft retainer 42. The radial length of the first through holes 421 above the center of the rotating shaft is greater than the radial length below the center of the rotating shaft, and the length of the shorter side is equal to the radius of the straight segment. When the straight segment moves downward to abut the lower edge of the first through hole 421, the center of the straight segment is exactly located at the center of the rotating shaft, and they are in a concentric state. When the straight segment moves upward, they enter an eccentric state. In this case, to increase the degree of eccentricity, the straight segment is controlled to move upward; to decrease the degree of eccentricity, the straight segment is controlled to move downward, which facilitates the adjustment of the movement state of the cutting device. This embodiment is described with the case where the collar 41 rotates to the point where the first through hole 421 extends exactly along the height direction. When the collar 41 rotates to other positions, the position and direction of movement of the eccentric seat 31 are referenced. Figure 5 The situation will change accordingly.

[0051] In some alternative embodiments, the switching mechanism 3 also includes a push plate 34, which is connected to the bracket 1 and can move relative to the bracket 1. The push plate 34 is connected to the eccentric seat 31.

[0052] The switching mechanism 3 further includes: a connecting sleeve 33, which includes a first body sleeved on the collar 41 and a second body located in the receiving cavity 411. The second body is provided with at least one connecting part. The outer circumferential surface of the collar 41 is provided with at least one second through hole 412, which communicates with the receiving cavity 411. The connecting part passes through the second through hole 412 and is connected to the first body. The first body is connected to the push plate 34. The connecting sleeve 33 can move along the axial direction of the collar 41 under the drive of the push plate 34. A swing shaft 32 is located in the receiving cavity 411 and can move along the receiving cavity 411. The swing shaft 32 is connected to the second body. One end of the swing shaft 32 facing the first through hole 421 has a first channel 321 that is inclined to the center of the rotation axis of the collar 41. The first channel 321 matches the inclined section. The inclined section of the eccentric seat 31 is disposed in the first channel 321 and can slide along the first channel 321.

[0053] The second through hole 412 has a certain length along the axial direction, allowing the connecting part to move axially along the collar 41 within the second through hole 412. The entire connecting sleeve 33 moves axially under the action of the push plate 34. The connecting sleeve 33 and the swing shaft 32 form a slider-like structure in the receiving cavity 411. The second main body of the connecting sleeve 33, located within the receiving cavity 411, pushes the swing shaft 32 to move axially within the receiving cavity 411. The first channel 321 on the swing shaft 32 matches the inclined section of the eccentric seat 31, which is also inclined relative to the rotation axis center of the collar 41, allowing the inclined section of the eccentric seat 31 to insert into the first channel 321 and slide relative to it. The movement of the inclined section of the eccentric seat 31 along the inclined direction can be decomposed into axial and radial movements, which are transmitted to the straight section, causing the straight section to move radially within the first through hole 421, changing the positional relationship between the center of the straight section and the center of the rotation axis. The relationship between the moving distance of the push plate 34 and the radial offset distance of the center of the straight segment is determined by the tilt angle of the inclined segment and the first channel 321. Based on the tilt angle, the offset distance of the center of the straight segment and the overall eccentricity of the cutting device can be precisely adjusted.

[0054] In addition, in some optional embodiments, a first locking part is provided at the connection between the straight segment and the inclined segment, and a second locking part is provided at the edge of the first through hole 421. The first locking part and the second locking part cooperate to restrict the movement of the eccentric seat 31 along the axial direction of the collar 41.

[0055] The first and second locking parts limit the movement of the eccentric seat 31 along the axial direction of the collar 41, preventing dislocation of the inclined and straight sections. They also convert the axial movement of the swing shaft 32 into radial movement of the eccentric seat 31. The swing shaft 32, constrained by the receiving cavity 411, can only move axially along the collar 41, while the eccentric seat 31, constrained by the first and second locking parts, can only move radially along the collar 41. When relative movement occurs between the inclined first channel 321 and the inclined section along the inclined direction, this relative movement is decomposed into axial movement of the swing shaft 32 and radial movement of the eccentric seat 31. This ensures that the eccentric seat 31 and the cutting mechanism 2 connected to the straight section of the eccentric seat 31 only experience radial displacement along the collar 41, without axial displacement, thus ensuring that the cutting part 211 of the cutting blade 21 and the position to be cut on the copper tube are always aligned.

[0056] by Figure 5Taking the following case as an example, when the swing shaft 32 moves forward, that is, closer to the first through hole 421, the inclined section moves downward and backward relative to the first channel 321, and the eccentric seat 31 moves downward relative to the collar 41, reducing the degree of eccentricity. When the inclined section falls completely into the first channel 321, the straight section abuts against the lower wall of the first through hole 421, and the center of the straight section coincides with the center of the rotation axis of the collar 41, and the cutting device enters a concentric state. When the swing shaft 32 moves backward, that is, away from the first through hole 421, the inclined section moves upward and forward relative to the first channel 321, and the eccentric seat 31 moves upward relative to the collar 41, increasing the degree of eccentricity.

[0057] In some alternative embodiments, there are two eccentric seats 31 and two collars 41, which are symmetrically arranged on both sides of the push plate 34. One eccentric seat 31 is connected to one collar 41, and the cutting mechanism 2 is connected between the two eccentric seats 31.

[0058] The cutting mechanism 2 has two sets of eccentric seats 31 and collars 41 on each side, and the movement of the two sets of eccentric seats 31 and collars 41 is synchronized, which constrains both sides of the cutting mechanism 2 and makes the movement more stable. Especially when the cutting head 22 has multiple cutting blades 21, the cutting head 22 is relatively long and is prone to vibration during eccentric rotation. Constraining the cutting mechanism 2 from both sides suppresses the vibration of the cutting head 22, prevents the cutting head 22 and cutting blades 21 from vibration damage, and improves the service life of the cutting device.

[0059] In addition, in some optional embodiments, the rotating mechanism 4 further includes a first driving member 43, a timing belt 44 and a timing pulley 45. The first driving member 43 is connected to the bracket 1 and is connected to a timing pulley 45. A collar 41 is connected to a timing pulley 45, and the timing belt 44 is wound around the timing pulley 45 so that the two collars 41 rotate synchronously.

[0060] The first drive component 43 is mounted on the bracket 1. The first drive component 43 rotates, which drives the synchronous pulley 45 to rotate. Under the movement of the synchronous belt 44, the synchronous pulley 45 connected to the rotary cutting spindle 46 on the collar 41 rotates simultaneously. The rotary cutting spindles 46 on both sides are fixed and rotated on the base 47. The rotary cutting spindle 46 rotates synchronously with the collar 41, the swing shaft 32, the shaft retainer 42 and the eccentric seat 31. The movement of the eccentric seat 31 is transmitted to the cutting mechanism 2 through the bearing 23.

[0061] In addition, in some optional embodiments, the switching mechanism 3 further includes a second drive member 35, a gear 36, a rack 37 and a slide rail 38 connected to the bracket 1. The second drive member 35 is connected to the gear 36, the gear 36 meshes with the rack 37, the rack 37 is connected to the push plate 34, and the push plate 34 is slidably disposed on the slide rail 38. The second drive member 35 is used to drive the gear 36 to rotate, so that the rack 37 pushes the push plate 34 to slide along the slide rail 38.

[0062] The extension directions of the rack 37 and slide rail 38 are consistent with the axial direction of the collar 41. Under the action of the second driving member 35, the gear 36 and rack 37 structure drives the push plate 34 to move axially, thereby driving the connecting sleeve 33 and swing shaft 32 to move axially, and the eccentric seat 31 to move radially along the collar 41.

[0063] When there are two eccentric seats 31 and two collars 41, the connecting sleeves 33 and the swing shafts 32 are also set in two sets. The two connecting sleeves 33 are symmetrically arranged on both sides of the push plate 34 and are tightly connected to the push plate 34 through the bearing pressure plate 39. The two connecting sleeves 33 are connected as a whole structure, so that the connecting sleeves 33 and the swing shafts 32 on both sides move synchronously under the push of the push plate 34.

[0064] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0065] Although alternative embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make further changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the alternative embodiments as well as all changes and modifications falling within the scope of the present invention.

[0066] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used merely to distinguish one entity from another, and do not necessarily require or imply any such actual relationship or order between these entities. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or terminal device that includes that element.

[0067] The technical solution provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the principle and implementation of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A cutting device, characterized in that, The cutting device includes: a support (1), and a cutting mechanism (2), a switching mechanism (3), and a rotating mechanism (4) connected to the support (1); wherein, The cutting mechanism (2) includes a cutting blade (21), which has a cavity for accommodating the material to be cut. The cutting blade (21) is provided with a cutting section (211) facing the cavity. The cutting mechanism (2) is connected to the switching mechanism (3). The rotating mechanism (4) is connected to the switching mechanism (3), and the rotating mechanism (4) is used to drive the switching mechanism (3) to rotate; The switching mechanism (3) can move relative to the rotating mechanism (4) so ​​that the center of the switching mechanism (3) and the rotation axis center of the rotating mechanism (4) can switch between a concentric state and an eccentric state. In the concentric state, the center of the switching mechanism (3) and the rotation axis center of the rotating mechanism (4) coincide, and the rotating mechanism (4) drives the switching mechanism (3) to rotate concentrically, while the cutting mechanism (2) remains stationary relative to the support (1). In the eccentric state, the center of the switching mechanism (3) deviates from the rotation axis center of the rotating mechanism (4), and the rotating mechanism (4) drives the switching mechanism (3) to rotate eccentrically, thereby causing the cutting blade (21) of the cutting mechanism (2) to rotate eccentrically relative to the material to be cut, so that the cutting part (211) in the cutting blade (21) cuts the material to be cut.

2. The cutting device according to claim 1, characterized in that, The switching mechanism (3) includes an eccentric seat (31), which includes an inclined section and a straight section arranged at an angle. The inclined section is slidably connected to the rotating mechanism (4) and inclined relative to the rotation axis center of the rotating mechanism (4). The straight section is rollably connected to the cutting mechanism (2). The inclined section can move relative to the rotating mechanism (4) along the inclined direction of the inclined section, so that the center of the straight section and the rotation axis center of the rotating mechanism (4) can switch between a concentric state and an eccentric state. In the concentric state, the center of the straight segment coincides with the center of the rotation axis of the rotating mechanism (4), and the rotating mechanism (4) drives the straight segment to rotate concentrically, while the cutting mechanism (2) remains stationary relative to the support (1). In the eccentric state, the center of the straight segment deviates from the center of the rotation axis of the rotating mechanism (4), and the rotating mechanism (4) drives the straight segment of the switching mechanism (3) to rotate eccentrically, thereby causing the cutting blade (21) of the cutting mechanism (2) to rotate eccentrically relative to the material to be cut, so that the cutting part (211) in the cutting blade (21) cuts the material to be cut.

3. A cutting device according to claim 2, characterized in that, The rotating mechanism (4) includes a collar (41) connected to the bracket (1). One end of the collar (41) is provided with a shaft retainer (42). The collar (41) and the shaft retainer (42) have the same rotation axis center. The collar (41) has a receiving cavity (411). The shaft retainer (42) is provided with a first through hole (421). The first through hole (421) communicates with the receiving cavity (411). The rotation axis center of the collar (41) and the shaft retainer (42) passes through the first through hole (421). The straight segment of the eccentric seat (31) passes through the first through hole (421), and the inclined segment is located in the receiving cavity (411). The first through hole (421) is larger in the radial direction of the shaft retainer (42) than the straight segment, so that the straight segment can move radially in the first through hole (421) along the shaft retainer (42). The center of the straight segment switches between concentric and eccentric states with the rotation axis center of the collar (41) and the shaft retainer (42). In the concentric state, the center of the straight line segment coincides with the rotation axis center of the collar (41) and the shaft retainer (42); In the eccentric state, the center of the straight segment is offset from the rotation axis center of the collar (41) and the shaft retainer (42).

4. A cutting device according to claim 3, characterized in that, The switching mechanism (3) further includes a push plate (34), which is connected to the bracket (1) and can move relative to the bracket (1). The push plate (34) is connected to the eccentric seat (31).

5. A cutting device according to claim 4, characterized in that, The switching mechanism (3) further includes: The link sleeve (33) includes a first body sleeved on the collar (41) and a second body located in the receiving cavity (411). The second body is provided with at least one connecting part. The outer peripheral surface of the collar (41) is provided with at least one second through hole (412). The second through hole (412) communicates with the receiving cavity (411). The connecting part passes through the second through hole (412) and is connected to the first body. The first body is connected to the push plate (34). The link sleeve (33) can move along the axial direction of the collar (41) under the drive of the push plate (34). A swing shaft (32) is located in the receiving cavity (411) and can move along the receiving cavity (411). The swing shaft (32) is connected to the second body. The end of the swing shaft (32) facing the first through hole (421) has a first channel (321) inclined to the center of the rotation axis of the collar (41). The first channel (321) matches the inclined section. The inclined section of the eccentric seat (31) is disposed in the first channel (321) and can slide along the first channel (321).

6. A cutting device according to claim 4, characterized in that, There are two eccentric seats (31) and two collars (41). The two eccentric seats (31) and two collars (41) are symmetrically arranged on both sides of the push plate (34). One eccentric seat (31) is connected to one collar (41). The cutting mechanism (2) is connected between the two eccentric seats (31).

7. A cutting device according to claim 6, characterized in that, The rotating mechanism (4) further includes a first driving member (43), a timing belt (44), and a timing belt (44) pulley. The first driving member (43) is connected to the bracket (1). The first driving member (43) is connected to one of the timing belt (44) pulleys. One of the collars (41) is connected to one of the timing belt (44) pulleys. The timing belt (44) is wound around the timing belt (44) pulleys so that the two collars (41) rotate synchronously.

8. A cutting device according to claim 4, characterized in that, The switching mechanism (3) further includes a second drive member (35), a gear (36), a rack (37), and a slide rail (38) connected to the bracket (1). The second drive member (35) is connected to the gear (36), the gear (36) meshes with the rack (37), the rack (37) is connected to the push plate (34), and the push plate (34) is slidably disposed on the slide rail (38). The second drive member (35) is used to drive the gear (36) to rotate, so that the rack (37) pushes the push plate (34) to slide along the slide rail (38).

9. A cutting device according to claim 3, characterized in that, A first locking part is provided at the position where the straight segment and the inclined segment are connected, and a second locking part is provided at the edge of the first through hole (421). The first locking part and the second locking part cooperate to restrict the movement of the eccentric seat (31) along the axial direction of the collar (41).

10. A cutting device according to claim 1, characterized in that, The cutting mechanism (2) further includes a cutting head (22), and there are multiple cutting blades (21). The multiple cutting blades (21) are spaced apart on the cutting head (22), and the cutting head (22) is connected to the switching mechanism (3).

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