A slitting and offset parallel mechanism for rod-shaped materials

Abstract

The present invention provides a staggered parallel mechanism for cutting rod-shaped materials, comprising a receiving wheel, a cutting wheel, a staggered wheel, a transition wheel and a parallel wheel which are connected in sequence. The surfaces of the receiving wheel, the cutting wheel, the staggered wheel, the transition wheel and the parallel wheel are all provided with a plurality of rod-supporting grooves for transmitting the rod-shaped materials, and each rod-supporting groove is provided with a negative pressure hole. The cutting wheel cuts the rod-shaped materials into two rows of short rods, the staggered wheel staggers the two rows of short rods cut, and the parallel wheel combines the two staggered rows of short rods into one row. The staggered wheel comprises an inner staggered wheel body and an outer staggered wheel body which separately transmit the two rows of short rods cut. The numbers of the rod-supporting grooves and the pitch circle diameters on the inner staggered wheel body and the outer staggered wheel body are the same. The inner staggered wheel body and the outer staggered wheel body intersect with the cutting wheel at the same pitch circle intersection point. The rotating axes of the inner staggered wheel body and the outer staggered wheel body are staggered by a certain distance, so that the intersection points on the inner staggered wheel body, the outer staggered wheel body and the transition wheel differ by half a pitch.

Description

Technical Field

[0001] The present invention relates to a production device for rod-shaped materials, and specifically to a slitting and offset parallel mechanism for rod-shaped materials. Background Art

[0002] A cigarette making unit includes a cigarette rod forming machine and a tipping machine. When producing finished short cigarettes, in the existing cigarette rod forming machine, due to the influence of its cutter head cutting principle, the minimum value of the cigarette rod length that can be directly cut is greater than the required cigarette rod length, and single-fold rod length cigarette rods cannot be directly cut out. Therefore, during the process of using the cigarette making unit to produce finished short cigarettes, a cigarette feeding mechanism is required to receive double-fold rod length cigarette rods from the cigarette rod forming machine, slit, offset, and axially shift them to supply single-fold rod length cigarette rods to the tipping machine, so as to realize the online production of the cigarette rod forming machine and the tipping machine.

[0003] Some devices in the food and pharmaceutical industries for producing finished short rod-shaped materials generally include a rod-shaped material forming machine and an output device. In the rod-shaped material forming machine part, it is also possible that the minimum value of the rod-shaped material length that can be directly cut is greater than the required rod-shaped material length, and finished short rod-shaped materials cannot be directly cut out for output.

[0004] In the cigarette feeding mechanism, the current method for offsetting cigarette rods is the "rolling and rubbing type": by hanging small rubbing plates on the offset wheel, the small rubbing plates are configured to contact one row of cigarette rods, and the cigarette rods roll on the offset wheel to form a double row of cigarette rods with front-back offset. This offset wheel structure is simple and easy to install and adjust. However, the "rolling and rubbing type" offset has high requirements for the roundness and material of the cigarette rods, and is prone to causing cigarette rod defects, affecting the quality of cigarette sticks. Under high-speed operation of the unit, blockages, chaotic rods, etc. are likely to occur, increasing the ratio of unqualified cigarette sticks and restricting the improvement of the production speed of the unit.

[0005] During the rotation and transmission of the cigarette rods with the cigarette feeding mechanism, generally, the end of the cigarette rod is directly pushed by a guide rail to achieve the axial displacement of the cigarette rod, and functions such as separation and parallelism are completed. This is likely to cause damage to the end of the cigarette rod, making the quality of the cigarette rod unstable and affecting the production efficiency of finished short cigarettes.

[0006] In the design theory of a drum, to achieve stable reception and transmission of rod-shaped materials, it is necessary to keep the "arc length of the pitch circle" of adjacent slots of the drum body as constant as possible to avoid large speed differences during the reception and transmission between drum bodies, resulting in unstable reception and transmission. Usually, the "arc length of the pitch circle" is defined as the pitch; when the pitch changes too much, it will impose a greater restriction on the production speed of the unit, and it is necessary to set auxiliary reception and transmission components or a drum that adapts to the variable pitch requirement with a more complex structure to ensure stable handover. Assuming the pitch circle diameter of the wheel body is D, the number of slots is n, and the pitch value

[0007] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the Invention

[0008] The object of the present invention is to overcome the deficiencies of the prior art, and thus provide a slitting and misalignment parallel mechanism for rod-shaped materials, which has a scientific design, can ensure the material quality, has good transmission stability, and is suitable for high-speed production.

[0009] To achieve the above object, the technical solution adopted by the present invention is: a slitting and misalignment parallel mechanism for rod-shaped materials, including a receiving wheel, a cutting wheel, a misalignment wheel, a transition wheel and a parallel wheel that are connected in sequence. A plurality of rod-receiving grooves for conveying rod-shaped materials are provided on the surfaces of the receiving wheel, the cutting wheel, the misalignment wheel, the transition wheel and the parallel wheel. A negative pressure hole is provided in each rod-receiving groove. The cutting wheel cuts the rod-shaped material into two rows of short rods, the misalignment wheel misaligns the two rows of cut short rods, and the parallel wheel combines the two misaligned rows of short rods into one row. The misalignment wheel includes an inner misalignment wheel body and an outer misalignment wheel body that separately convey the two rows of cut short rods. The number of rod-receiving grooves and the pitch circle diameters on the inner misalignment wheel body and the outer misalignment wheel body are the same. The inner misalignment wheel body and the outer misalignment wheel body are connected to the cutting wheel through the same pitch circle intersection point. The rotation axes of the inner misalignment wheel body and the outer misalignment wheel body are offset by a certain distance, so that the intersection points of the inner misalignment wheel body and the outer misalignment wheel body with the transition wheel are half a pitch apart.

[0010] Based on the above, let the distance by which the rotation axes of the inner misalignment wheel body and the outer misalignment wheel body are offset be A, the number of rod-receiving grooves be n 1 , and the pitch circle diameter be D 1 . The included angle between the connecting line of the center of the inner misalignment wheel body and the intersection point with the cutting wheel and the connecting line of the center of the outer misalignment wheel body and the intersection point with the cutting wheel is θ. Then the angle μ of the pitch circle arc = 360° / n 1 , θ = μ / 4, The misalignment wheel rotates counterclockwise. The rotation axis of the inner misalignment wheel body is arranged higher than the rotation axis of the outer misalignment wheel body. The inner misalignment wheel body intersects with the transition wheel after rotating 180° - θ, and the outer misalignment wheel body intersects with the transition wheel after rotating 180° + θ.

[0011] Based on the above, the rotation axes of the inner misalignment wheel body, the transition wheel and the parallel wheel are installed on the same horizontal plane. The included angle between the connecting line of the rotation axes of the cutting wheel and the inner misalignment wheel body and the horizontal conveying direction is 180° - θ; the included angle between the connecting line of the rotation axes of the cutting wheel and the outer misalignment wheel body and the horizontal conveying direction is 180° + θ.

[0012] Based on the above, the parallel wheel includes a rotatable rotary wheel body, a fixedly installed cylindrical cam, and a plurality of pairs of outer sliding blocks and inner sliding blocks. Guide rods are respectively arranged on the rotary wheel body corresponding to each pair of outer sliding blocks and inner sliding blocks. The outer sliding blocks and the inner sliding blocks are both sleeved on the guide rods, and thus rotate together with the rotary wheel body;

[0013] The surface of the cylindrical cam is provided with an outer cam groove and an inner cam groove. The outer cam groove and the inner cam groove are wider in the side facing the transition wheel and narrower in the side facing the output of the downstream device. An outer sliding rod is connected to the outer sliding block, and an inner sliding rod is connected to the inner sliding block. Bearings are respectively arranged at the end of the outer sliding rod corresponding to the outer cam groove and at the end of the inner sliding rod corresponding to the inner cam groove. As the outer sliding block and the inner sliding block rotate, the outer cam groove pulls the outer sliding block to move axially through the outer sliding rod, and the inner cam groove pulls the inner sliding block to move axially through the inner sliding rod;

[0014] The bearing rod grooves on the outer surface of the outer sliding block and the bearing rod grooves on the outer surface of the inner sliding block are arranged in a staggered manner and form a toothed biting structure. When a pair of outer sliding blocks and inner sliding blocks rotate to the junction with the transition wheel, the outer sliding block and the inner sliding block are completely separated, so as to accurately align with the bearing rod grooves on the transition wheel. When a pair of outer sliding blocks and inner sliding blocks rotate to the junction with the downstream device, the outer sliding block and the inner sliding block bite together, so that the bearing rod grooves on the outer sliding block and the bearing rod grooves on the inner sliding block are combined into one row.

[0015] Based on the above, both the outer cam groove and the inner cam groove have a smooth transition during the axial direction change. During the axial sliding process of the outer sliding block and the inner sliding block, they always move symmetrically relative to the center line of the transmission of the two rows of short rods.

[0016] Based on the above, three bearing rod grooves are respectively opened on the outer surface of each outer sliding block and the outer surface of each inner sliding block.

[0017] Based on the above, linear bearings are respectively installed between the outer sliding block and the guide rod, and between the inner sliding block and the guide rod.

[0018] Based on the above, a cutting groove is opened in the center of the outer peripheral surface of the cutting wheel. A centering adjustment mechanism and a cutting groove cleaning mechanism are arranged beside the cutting wheel. A cutting knife is arranged on the centering adjustment mechanism. The centering adjustment mechanism drives the cutting knife to align with the cutting groove and extend into the cutting groove. The cutting groove cleaning mechanism is arranged at the position where the cutting wheel has output the short rods and has not received the rod-shaped material. The cutting groove cleaning mechanism corresponds to the cutting groove to clean the residual material in the cutting groove.

[0019] Based on the above, the receiving and output pitches of the receiving wheel, the cutting wheel, the misalignment wheel, and the transition wheel are the same, and this pitch is set as P 0 ; the receiving pitch of the parallel wheel is 2P 0 and the output pitch is P 0 , and a transfer guide rail is provided at the junction of the transition wheel and the parallel wheel

[0020] Based on the above, the receiving and output pitches of the receiving wheel, the cutting wheel, the misalignment wheel, and the transition wheel are the same, and this pitch is set as 2P 0 ; the receiving pitch of the parallel wheel is 2P 0 and the output pitch is P 0 .

[0021] The present invention has outstanding substantive features and remarkable progress compared with the prior art. Specifically, the present invention has the following advantages:

[0022] (1) The misalignment wheel is set as the independent inner misalignment wheel body and the outer misalignment wheel body, which respectively transmit two rows of short rods. By eccentrically installing the rotating shafts of the inner misalignment wheel body and the outer misalignment wheel body, the two can receive the short rods cut by the cutting wheel at the same position. When rotating to the other side, the positions where the short rods of the inner misalignment wheel body and the outer misalignment wheel body are handed over to the transition wheel just differ by half a pitch, so as to realize the misalignment of the two rows of short rods, cancel the traditional "rolling and rubbing" misalignment method, and thus ensure the quality of the cigarette rods during the misalignment process

[0023] (2) The parallel wheel drives a plurality of outer sliding blocks and inner sliding blocks to rotate through the rotating wheel body, and an outer sliding rod is arranged on the outer sliding block, and an inner sliding rod is arranged on the inner sliding block, which cooperate with the outer cam groove and the inner cam groove on the surface of the cylindrical cam to realize the compound movement of rotation and axial movement. When the parallel wheel rotates to one side of the transition wheel, the outer sliding block and the inner sliding block are completely separated to receive the two rows of short rods on the transition wheel. When the parallel wheel rotates to one side of the downstream equipment, the outer sliding block and the inner sliding block are engaged together, so as to arrange the two misaligned rows of short rods into one row, cancel the traditional way that the parallel wheel directly pushes the end of the cigarette rod through the guide rail to realize the axial displacement of the cigarette rod, avoid damage to the end of the cigarette rod, and thus ensure the quality of the cigarette rods during the parallel process

[0024] (3) On the premise that the requirements for the receiving and output pitches of the system remain unchanged, the receiving pitch of the parallel wheel is twice the main pitch of the system. By setting the transfer guide rail, the stability of the handover can be ensured, so that during the entire process of receiving, cutting, misaligning, conveying, and parallelizing, the quality of the rod-shaped material and the stability of the transmission can be ensured, and thus it can better adapt to the occasion of high-speed production

[0025] (4) Without being restricted by the system, the receiving and output pitches between each drum can be kept completely unchanged, so that it can be applicable to occasions with higher production speeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of the slitting and offset parallel mechanism for rod-shaped materials in Embodiment 1.

[0027] Figure 2 It is a schematic process flow diagram of the slitting and offset parallel mechanism for rod-shaped materials in Embodiment 1.

[0028] Figure 3 It is a schematic structural diagram of the offset wheel in Embodiment 1.

[0029] Figure 4 It is a schematic diagram of the working principle of the side of the offset wheel in Embodiment 1.

[0030] Figure 5 It is a schematic structural diagram of the parallel wheel in Embodiment 1.

[0031] Figure 6 It is a schematic diagram of the working principle of the top surface of the parallel wheel in Embodiment 1.

[0032] Figure 7 It is a schematic diagram of the working principle of the side of the parallel wheel in Embodiment 1.

[0033] Figure 8 It is a schematic structural diagram of the outer cam groove and the inner cam groove in Embodiment 1.

[0034] Figure 9 It is a schematic structural diagram of the slitting and offset parallel mechanism for rod-shaped materials in Embodiment 2.

[0035] In the figure: 1. Receiving wheel; 2. Cutting wheel; 3. Offset wheel; 4. Transition wheel; 5. Parallel wheel; 6. Double-length rod-shaped material; 7. Short rod; 8. Centering adjustment mechanism; 9. Groove cleaning mechanism; 10. Cutting tool; 11. Inner offset wheel body; 12. Outer offset wheel body; 13. Rotary wheel body; 14. Cylindrical cam; 15. Outer sliding block; 16. Inner sliding block; 17. Guide rod; 18. Outer cam groove; 19. Inner cam groove; 20. Outer sliding rod; 21. Inner sliding rod; 22. Bearing; 23. Transfer guide rail. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The technical solutions of the present invention will be further described in detail below through specific embodiments.

[0037] Embodiment 1

[0038] As Figures 1-8As shown in the figure, a slitting and offset parallel mechanism for rod-shaped materials includes a receiving wheel 1, a cutting wheel 2, an offset wheel 3, a transition wheel 4, and a parallel wheel 5 that are connected in sequence. A number of rod-receiving grooves for conveying rod-shaped materials are provided on the surfaces of the receiving wheel 1, the cutting wheel 2, the offset wheel 3, the transition wheel 4, and the parallel wheel 5. A negative pressure hole is provided in each rod-receiving groove. The rod-receiving groove is used to grip the rod-shaped material, and the adsorption and release of the rod-shaped material are achieved through the air extraction and air cut-off of the negative pressure hole.

[0039] The receiving wheel 1 rotates counterclockwise to receive the double-length rod-shaped material 6 from the upstream equipment and convey the double-length rod-shaped material 6 to the cutting wheel 2.

[0040] The cutting wheel 2 rotates clockwise. A cutting groove is provided in the center of the outer peripheral surface of the cutting wheel. A centering adjustment mechanism 8 and a cutting groove cleaning mechanism 9 are provided beside the cutting wheel 2. A cutting knife 10 is provided on the centering adjustment mechanism 8. The centering adjustment mechanism 8 drives the cutting knife 10 to align with the cutting groove and extend into the cutting groove to cut the double-length rod-shaped material 6 into two rows of short rods 7. The cutting groove cleaning mechanism 9 is provided at the position where the cutting wheel 2 has output the short rods 7 and has not received the double-length rod-shaped material 6. The cutting groove cleaning mechanism 9 is provided corresponding to the cutting groove to prevent residual debris from clogging the cutting wheel 2.

[0041] The offset wheel 3 rotates counterclockwise and includes two wheel bodies, an inner offset wheel body 11 and an outer offset wheel body 12, which are used to separately convey the two rows of cut short rods 7. The number of rod-receiving grooves and the pitch circle diameters on the inner offset wheel body 11 and the outer offset wheel body 12 are the same. In order to achieve offset, the axes of the inner offset wheel body 11 and the outer offset wheel body 12 are offset by a certain distance. The axis of the inner offset wheel body 11 is set higher than the axis of the outer offset wheel body 12. Specifically, let the offset distance between the axes of the inner offset wheel body 11 and the outer offset wheel body 12 be A, the number of rod-receiving grooves be n 1 and the pitch circle diameter be D 1 , the included angle between the connecting line of the center of the inner offset wheel body 11 and the intersection point of the cutting wheel 12 and the connecting line of the center of the outer offset wheel body 12 and the intersection point of the cutting wheel 2 is θ, then the angle μ of the pitch arc = 360° / n 1 , θ = μ / 4, The inner offset wheel body 11 and the outer offset wheel body 12 are connected to the cutting wheel 2 through the same pitch circle intersection point. The inner offset wheel body 11 is connected to the transition wheel 4 after rotating 180° - θ, and the outer offset wheel body 12 is connected to the transition wheel 4 after rotating 180° + θ. In this way, the intersection points of the inner offset wheel body 11, the outer offset wheel body 12 and the transition wheel 4 can be made to differ by half a pitch, realizing the offset of the two rows of short rods 7.

[0042] In order to facilitate installation and debugging, the rotating shafts of the inner staggered wheel body 11, the transition wheel 4, and the parallel wheel 5 are installed on the same horizontal plane, and the angle between the rotating shaft of the cutting wheel 2 and the connecting line of the rotating shaft of the inner staggered wheel body 11 and the horizontal transmission direction is 180°-θ; the angle between the rotating shaft of the cutting wheel 2 and the connecting line of the rotating shaft of the outer staggered wheel body 12 and the horizontal transmission direction is 180°+θ.

[0043] The parallel wheel 5 includes a rotatable rotating wheel body 13, a fixedly mounted cylindrical cam 14, and a plurality of outer sliding blocks 15 and inner sliding blocks 16. A guide rod 17 is provided on the rotating wheel body 13 corresponding to each pair of outer sliding blocks 15 and inner sliding blocks 16. The outer sliding blocks 15 and the inner sliding blocks 16 are both mounted on the guide rod 17 through linear bearings so as to rotate with the rotating wheel body 13. Three rod bearing grooves are respectively provided on the outer surface of each outer sliding block 15 and the outer surface of each inner sliding block 16.

[0044] The surface of the cylindrical cam 14 is provided with an outer cam groove 18 and an inner cam groove 19, the outer cam groove 18 and the inner cam groove 19 are relatively wide at the side facing the transition wheel 4, and the outer cam groove 18 and the inner cam groove 19 are relatively narrow at the side facing the output of the downstream device, the outer sliding block 15 is connected with an outer sliding rod 20, and the inner sliding block 16 is connected with an inner sliding rod 21, and the ends of the outer sliding rod 20 and the ends of the inner sliding rod 21 are respectively provided with bearings 22 corresponding to the outer cam groove 18 and the inner cam groove 19, as the outer sliding block 15 and the inner sliding block 16 rotate, the outer cam groove 18 pulls the outer sliding block 15 to move axially through the outer sliding rod 20, and the inner cam groove 19 pulls the inner sliding block 16 to move axially through the inner sliding rod 21, thereby realizing a composite movement of rotation and axial movement;

[0045] The rod-bearing grooves on the outer surface of the outer sliding block 15 and the rod-bearing grooves on the outer surface of the inner sliding block 16 are arranged alternately and form a tooth-like interlocking structure. When a pair of outer sliding blocks 15 and inner sliding blocks 16 rotate to the intersection with the transition wheel 4, the outer sliding block 15 and the inner sliding block 16 are completely separated, so as to be accurately aligned with the rod-bearing grooves on the transition wheel 4 to achieve the intersection of two rows of short bars 7. When a pair of outer sliding blocks 15 and inner sliding blocks 16 rotate to the intersection with the downstream equipment, the outer sliding block 15 and the inner sliding block 16 are interlocked together, so that the rod-bearing grooves on the outer sliding block 15 and the rod-bearing grooves on the inner sliding block 16 are merged into one row and output to the downstream equipment.

[0046] To make the outer slider 15 and the inner slider 16 move more smoothly, the outer cam groove 18 and the inner cam groove 19 are both smoothly transitioned during the axial direction change. During the axial sliding process of the outer slider 15 and the inner slider 16, they always move symmetrically relative to the center line of the transmission of the two rows of short rods 7, ensuring that the transmission does not deviate.

[0047] Since in the entire system, the pitch requirements of the upstream equipment and the downstream equipment are the same, but the parallel wheel 5 must have a process of changing the pitch. Therefore, it is designed that the receiving and output pitches of the receiving wheel 1, the cutting wheel 2, the offset wheel 3, and the transition wheel 4 are the same, and this pitch is set as P 0 , the receiving pitch of the parallel wheel is 2P 0 and the output pitch is P 0 , a transfer guide rail 23 is provided at the junction of the transition wheel 4 and the parallel wheel 5. In actual products, the groove shape of the rod receiving groove can also be optimized to ensure the stability of the junction. This method has relatively little modification in the entire system and can ensure the quality of the rod-shaped material and the stability of the transmission, thus better adapting to high-speed production occasions.

[0048] During specific use, the receiving wheel 1 first receives the double-length rod-shaped material 6 from the upstream equipment and transfers it to the cutting wheel 2, which cuts the double-length rod-shaped material 6 into two rows of short rods 7. Then, the offset of the two rows of short rods 7 is realized through the offset wheel 3. There is no "rolling and rubbing" of the small washboard during the offset process, thus ensuring the quality of the offset short rods 7. It is transferred to the transition wheel 4 for transitional transmission and finally transferred to the parallel wheel 5 to realize the parallelism of the two rows of short rods 7. There is no friction between the guide rail and the ends of the short rods 7 during the parallel process, thus ensuring the quality of the parallel short rods 7. Therefore, during the entire process of receiving, cutting, offsetting, transmitting, and parallelizing, the quality of the rod-shaped material can be ensured, thereby improving the stability of the transmission and better carrying out high-speed production.

[0049] Embodiment 2

[0050] As Figure 9 shown, the difference between this embodiment and Embodiment 1 is that on the premise that there is no pitch limit for the upstream and downstream equipment of the system, the receiving and output pitches of the receiving wheel 1, the cutting wheel 2, the offset wheel 3, and the transition wheel 4 can be the same, and this pitch is set as 2P 0 ; the receiving pitch of the parallel wheel 5 is 2P 0 and the output pitch is P 0 ; in this way, during the handover process between the transition wheel 4 and the parallel wheel 5, the assistance of the transfer guide rail is not required, and the transmission is smoother, thus being able to adapt to production occasions with higher speeds.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that it is still possible to modify the specific implementation manners of the present invention or perform equivalent replacements on some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. A parallel mechanism for cutting rod-shaped materials, comprising a receiving wheel, a cutting wheel, a dislocation wheel, a transition wheel and a parallel wheel connected in sequence, wherein the surfaces of the receiving wheel, the cutting wheel, the dislocation wheel, the transition wheel and the parallel wheel are provided with a plurality of rod-carrying grooves for conveying rod-shaped materials, each of the rod-carrying grooves is provided with a negative pressure hole, the receiving wheel is used to receive double-length rod-shaped materials and transfer them to the cutting wheel, and the cutting wheel cuts the double-length rod-shaped materials into two rows of short rods, Features: The staggered wheel includes an inner staggered wheel body and an outer staggered wheel body for transmitting the two rows of cut short bars separately, the number of rod-bearing grooves and the pitch circle diameter on the inner staggered wheel body and the outer staggered wheel body are the same, the inner staggered wheel body and the outer staggered wheel body are connected with the cutting wheel through the same pitch circle intersection point, the rotating shafts of the inner staggered wheel body and the outer staggered wheel body are eccentrically installed, when they rotate to the other side, the intersection points of the short bars on the inner staggered wheel body, the outer staggered wheel body and the transition wheel differ by half a pitch, thereby realizing the staggering of the two rows of short bars, and transmitting them to the transition wheel for transition transmission, and finally transmitting them to the parallel wheel, which combines the two staggered rows of short bars transmitted from the transition wheel into one row.

2. The parallel mechanism for cutting bar-shaped materials according to claim 1, Features: Let the distance by which the axes of the inner misaligned wheel body and the outer misaligned wheel body are offset be A, and the number of rod receiving grooves be n 1 , and the pitch diameter be D 1 . Let the included angle between the line connecting the center of the inner misaligned wheel body and the intersection point of the cutting wheel, and the line connecting the center of the outer misaligned wheel body and the intersection point of the cutting wheel be θ. Then the angle μ of the pitch arc = 360° / n 1 , θ = μ / 4 The misaligned wheel rotates counterclockwise. The axis of the inner misaligned wheel body is set higher than the axis of the outer misaligned wheel body. After the inner misaligned wheel body rotates by an angle of 180° - θ, it makes contact with the transition wheel. After the outer misaligned wheel body rotates by an angle of 180° + θ, it makes contact with the transition wheel.

3. The parallel mechanism for cutting bar-shaped materials according to claim 2, Features: The rotating shafts of the inner staggered wheel body, the transition wheel and the parallel wheel are installed on the same horizontal plane, and the angle between the rotating shaft of the cutting wheel and the connecting line of the rotating shaft of the inner staggered wheel body and the horizontal transmission direction is 180°-θ; the angle between the rotating shaft of the cutting wheel and the connecting line of the rotating shaft of the outer staggered wheel body and the horizontal transmission direction is 180°+θ.

4. The parallel mechanism for cutting bar-shaped materials according to any one of claims 1 to 3, Features: The parallel wheel comprises a rotatable rotating wheel body, a fixed cylindrical cam and a plurality of outer sliding blocks and inner sliding blocks. A guide rod is provided on the rotating wheel body corresponding to each outer sliding block and inner sliding block. The outer sliding block and the inner sliding block are both passed through the guide rod so as to rotate together with the rotating wheel body. The cylindrical cam surface is provided with an outer cam groove and an inner cam groove, the outer cam groove and the inner cam groove are wider at a side facing the transition wheel, and the outer cam groove and the inner cam groove are narrower at a side facing the output of the downstream device, the outer sliding block is connected with an outer sliding rod, the inner sliding block is connected with an inner sliding rod, and the end of the outer sliding rod corresponds to the outer cam groove and the end of the inner sliding rod corresponds to the inner cam groove. Bearings are respectively provided, and as the outer sliding block and the inner sliding block rotate, the outer cam groove pulls the outer sliding block to move axially through the outer sliding rod, and the inner cam groove pulls the inner sliding block to move axially through the inner sliding rod; The receiving rod grooves on the outer surface of the outer sliding block and the receiving rod grooves on the outer surface of the inner sliding block are arranged staggeredly and form a toothed engagement structure. When a pair of outer sliding blocks and inner sliding blocks rotate to the junction with the transition wheel, the outer sliding block and the inner sliding block are completely separated, so as to be accurately aligned with the receiving rod grooves on the transition wheel. When a pair of outer sliding blocks and inner sliding blocks rotate to the junction with the downstream equipment, the outer sliding block and the inner sliding block are engaged together, so that the receiving rod grooves on the outer sliding block and the receiving rod grooves on the inner sliding block are combined into one row.

5. The slitting and offset parallel mechanism for rod-shaped materials according to claim 4, characterized in that: Both the outer cam groove and the inner cam groove are smoothly transitioned during the axial direction change. During the axial sliding process of the outer sliding block and the inner sliding block, they always move symmetrically with respect to the center line of the two rows of short rod conveyances.

6. The slitting and offset parallel mechanism for rod-shaped materials according to claim 5, characterized in that: Three receiving rod grooves are respectively formed on the outer surface of each outer sliding block and the outer surface of each inner sliding block.

7. The slitting and offset parallel mechanism for rod-shaped materials according to claim 6, characterized in that: Linear bearings are respectively installed between the outer sliding block and the guide rod, and between the inner sliding block and the guide rod.

8. The slitting and offset parallel mechanism for rod-shaped materials according to any one of claims 1, 2, 3, 5, 6 and 7, characterized in that: A cutting groove is formed in the center of the outer peripheral surface of the cutting wheel. A centering adjustment mechanism and a cutting groove cleaning mechanism are arranged beside the cutting wheel. A cutting knife is arranged on the centering adjustment mechanism. The centering adjustment mechanism drives the cutting knife to align with the cutting groove and extend into the cutting groove. The cutting groove cleaning mechanism is arranged at the position where the cutting wheel has output the short rods and has not received the rod-shaped materials. The cutting groove cleaning mechanism is arranged corresponding to the cutting groove to clean the residual materials in the cutting groove.

9. The slitting and offset parallel mechanism for rod-shaped materials according to any one of claims 1, 2, 3, 5, 6 and 7, characterized in that: The receiving and output pitches of the receiving wheel, the cutting wheel, the dislocation wheel, and the transition wheel are the same, and this pitch is set as P 0 ; the receiving pitch of the parallel wheel is 2P 0 , and the output pitch is P 0 , and a transfer guide rail is provided at the junction of the transition wheel and the parallel wheel.

10. The slitting and offset parallel mechanism for rod-shaped materials according to any one of claims 1, 2, 3, 5, 6 and 7, characterized in that: The receiving and output pitches of the receiving wheel, the cutting wheel, the offset wheel, and the transition wheel are the same, and this pitch is set to 2P 0 ; the receiving pitch of the parallel wheel is 2P 0 , and the output pitch is P 0 .

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