Cutting equipment for parallel bundled wire connecting rib

Abstract

The utility model discloses cutting equipment for a parallel cluster lead connecting rib. The cutting equipment comprises a mounting seat, a lead transmission mechanism and a cutting mechanism, wherein the lead transmission mechanism is arranged on the mounting seat and is used for driving a parallel cluster lead to move along the length direction of the parallel cluster lead; the cutting mechanism is used for cutting the parallel cluster lead connecting rib; the cutting mechanism comprises at least one cutting blade and a driving assembly for driving the cutting blade to reciprocate, and the driving assembly is connected with the wire transmission mechanism in a matched manner, so that the plurality of cutting blades simultaneously reciprocate to cut the connecting ribs of the parallel clustered wires while the parallel clustered wires move. The equipment provided by the utility model can realize the cutting of the connecting rib of the parallel bundled wire, the cutting direction of the cutting part does not need to be manually grasped even if manual feeding is needed, the problem of cutting quality caused by the change of the position of a cutting blade in the manual cutting process can be avoided, and the working efficiency is improved. Therefore, the equipment can meet the cutting quality, reduce the cutting time and improve the processing efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting, in particular to a parallel clustered wire connecting rib cutting device. Background Art

[0002] Parallel cluster conductors are a new type of transmission line. The emergence of this line solves some problems that exist in traditional transmission lines when transmitting electric energy. At present, parallel cluster conductors have been widely studied and applied both at home and abroad. In addition, parallel cluster conductors are also a new type of transmission line with broad application prospects. In the future, with the continuous advancement of technology and the continuous expansion of application scenarios, parallel cluster conductors will be more widely used and developed.

[0003] like Fig.14 , which is a schematic cross-sectional view of a parallel bundled conductor 104 in the prior art, generally includes a plurality of spaced-apart parallel cores 106, and any adjacent cores 106 are connected by connecting ribs 105. During use, the parallel bundled conductor can be used as a whole or cut. Therefore, in the construction of power engineering, cutting the connecting ribs of the parallel bundled conductor is one of the common operations.

[0004] Since parallel bundled conductors are relatively flat, the traditional manual cutting method is currently used to cut the connecting ribs of parallel bundled conductors. However, the manual cutting method is not only inefficient, but also requires a lot of manpower and time, and is prone to errors; it cannot guarantee the accuracy and flatness of the cutting, and cannot avoid problems such as burrs and deformation; at the same time, the traditional manual cutting method requires the operator to directly contact the blade and cutting tool, which is also prone to accidental injuries. For this reason, it is now necessary to provide a special device that can cut the connecting ribs of parallel bundled conductors. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a parallel bundled wire connecting rib cutting device, which can achieve directional cutting of the parallel bundled wire connecting ribs, avoiding the problems of poor cutting flatness and safety risks caused by manual cutting of the parallel bundled wire connecting ribs.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a parallel bundled wire connection rib cutting device, comprising a mounting seat and a wire transmission mechanism arranged on the mounting seat for driving the parallel bundled wire to move along its length direction and a cutting mechanism for cutting the parallel bundled wire connection rib;

[0007] The cutting mechanism includes at least one cutting blade and a driving assembly for driving the cutting blade to move back and forth. The driving assembly is connected with the wire transmission mechanism so that while the parallel bundled wires are moving, multiple cutting blades simultaneously move back and forth to cut the connecting ribs of the parallel bundled wires.

[0008] Principle of the utility model:

[0009] The number of cutting blades can be set according to needs. If the parallel bundled wires need to be cut into two parts, one cutting blade is sufficient; if the parallel bundled wires need to be cut into three parts at one time, two cutting blades are sufficient, and so on. The number of cutting blades can be selected according to needs.

[0010] During cutting, the wire transmission mechanism feeds the parallel bundled wires to be cut along their length direction, and the parallel bundled wires move to the cutting blade position. At this time, the cutting blade can move back and forth under the cooperation of the driving assembly and the wire transmission mechanism. Considering the feeding direction of the parallel bundled wires, the setting position of the cutting blade must be intersected with the length direction of the parallel bundled wires. Preferably, the setting method of the cutting blade must be perpendicular to the length direction of the parallel bundled wires. At this time, the parallel bundled wires continue to move, and the cutting blade reciprocates along the length direction perpendicular to the parallel bundled wires to cut the connecting ribs of the parallel bundled wires, thereby achieving the purpose of directional cutting of the connecting ribs of the parallel bundled wires.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The device provided by the utility model can realize the cutting of the connecting ribs of parallel bundled wires. Even if manual feeding is required, the cutting part does not need to manually control the cutting direction, which can avoid the problem of cutting quality caused by the position of the cutting blade during manual cutting. The device of the utility model can not only meet the cutting quality but also reduce the cutting time and improve the processing efficiency.

[0013] Furthermore, the wire transmission mechanism includes two driving rollers and auxiliary rollers that rotate relative to each other and are both rotatably connected to the mounting base. The parallel bundled wires are located between the driving rollers and the auxiliary rollers. The rotation of the driving rollers drives the parallel bundled wires to move along their length direction; wherein the cutting blade is located in front of the movement of the parallel bundled wires.

[0014] Furthermore, the driving assembly includes a limit rod, a connecting member and a rotating member.

[0015] The cutting blade is connected to a limit rod, and the limit rod is slidably arranged along the mounting seat;

[0016] The connecting member includes a movable rod hinged to the cutting blade, an eccentric shaft movably connected to the movable rod, and an auxiliary rotating disk, wherein the circumferential surfaces of the eccentric shaft and the auxiliary rotating disk are fixed and located at an eccentric position of the auxiliary rotating disk;

[0017] The rotating member drives the auxiliary rotating disk to rotate, driving the eccentric shaft to move in a circular manner. The movement of the eccentric shaft drives the cutting blade to move back and forth and simultaneously drives the limiting rod to slide back and forth on the mounting seat.

[0018] Furthermore, the rotating member includes a driving rotating disk fixed coaxially with the driving roller or the auxiliary roller and a transmission belt connecting the auxiliary rotating disk and the driving rotating disk. The driving roller or the auxiliary roller rotates to drive the auxiliary rotating disk to rotate.

[0019] Furthermore, the auxiliary rotating disk and the driving rotating disk are both in a truncated cone structure, and the cone directions of the auxiliary rotating disk and the driving rotating disk are arranged in opposite directions.

[0020] The transmission belt is sleeved on the auxiliary rotating disk and the driving rotating disk and moves along the frustum direction, and the transmission belt sleeved on the auxiliary rotating disk and the driving rotating disk is tensioned by a tensioning wheel arranged on the mounting seat.

[0021] Furthermore, at least two clamping wheels arranged side by side are sleeved on the driving roller along its length direction, and the clamping wheels move along the driving roller and rotate with the driving roller;

[0022] A plurality of parallel auxiliary wheels having the same number as the pressing wheels are sleeved on the auxiliary roller along its length direction, and the auxiliary wheels move along the auxiliary roller and rotate with the auxiliary roller;

[0023] Multiple clamping wheels and multiple auxiliary wheels are respectively used to clamp the wire cores of the parallel bundled wires. The multiple clamping wheels rotate simultaneously to drive the parallel bundled wires to move along their length direction. The number of cutting blades is one, and the cutting blade is located in front of the movement of the parallel bundled wires and between any two adjacent clamping wheels.

[0024] Furthermore, at least one distance adjustment component is included, and the distance adjustment component includes a main component for adjusting the distance between the pressing wheels and a secondary component for adjusting the distance between the auxiliary wheels.

[0025] The main component includes a mounting frame, an adjusting shaft rotatably arranged on the mounting frame, and a connecting rod fixed on the adjusting shaft, and both ends of the connecting rod are respectively slidably arranged on two pressing wheels matched with the cutting blade;

[0026] The auxiliary component comprises a support frame, a connecting shaft rotatably arranged on the support frame and a rotating rod fixed on the connecting shaft, and two ends of the rotating rod are respectively slidably arranged on two auxiliary wheels matched with the two clamping wheels.

[0027] Furthermore, the driving roller is sleeved with N clamping wheels arranged side by side along its length direction, and the clamping wheels move along the driving roller and rotate with the driving roller;

[0028] The auxiliary roller is provided with N parallel auxiliary wheels along its length direction, and the auxiliary wheels move along the auxiliary roller and rotate with the auxiliary roller;

[0029] Wherein, N is a natural number greater than 2;

[0030] N clamping wheels and N auxiliary wheels are respectively used to clamp the cores of the parallel bundled wires, and the N clamping wheels rotate simultaneously to drive the parallel bundled wires to move along their length direction; the number of cutting blades is N-1, and any cutting blade is located in front of the movement of the parallel bundled wires and between any two adjacent clamping wheels.

[0031] Furthermore, it also includes N-1 distance adjustment components, each distance adjustment component includes a main component and a sub-component,

[0032] The main component includes a mounting frame, an adjusting shaft rotatably arranged on the mounting frame, and a connecting rod fixed on the adjusting shaft. The two ends of the connecting rod are respectively slidably arranged on any two adjacent pressing wheels. The cutting blades of the mounting frame and the two adjacent pressing wheels are positioned and slidably matched. The two connecting rods of the two adjacent main components are hinged.

[0033] The auxiliary component includes a support frame, a connecting shaft rotatably arranged on the support frame, and a rotating rod fixed on the connecting shaft. The two ends of the rotating rod are respectively slidably arranged on two auxiliary wheels cooperating with the two clamping wheels. The cutting blade cooperating with the support frame and the two adjacent auxiliary wheels is positioned and slid, and the two rotating rods of the two adjacent auxiliary components are hinged.

[0034] Furthermore, a first limit shell rotatably connected to the outer periphery of the clamping wheel is provided, and a first strip slide groove perpendicular to the length direction of the driving roller is provided on the first limit shell, and the end of the connecting rod is embedded in the first strip slide groove and moves along the length direction of the first strip slide groove;

[0035] A second limiting shell rotatably connected to the auxiliary wheel is arranged at the periphery thereof, and a second strip slide groove perpendicular to the length direction of the auxiliary roller is arranged on the second limiting shell, and the end of the rotating rod is embedded in the second strip slide groove and moves along the length direction of the second strip slide groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the appearance of the utility model;

[0037] Figure 2 This is a schematic diagram of the internal structure of one of the structures of the utility model;

[0038] Figure 3 for Figure 2 A schematic diagram of the structure from another perspective;

[0039] Figure 4 It is a schematic diagram of the structure of another structure of the utility model used in conjunction with the internal structure and parallel bundled wires;

[0040] Figure 5 for Figure 4The schematic diagram of the structure in which the parallel bundled conductors are removed;

[0041] Figure 6 It is a schematic diagram of the structure of another structure of the utility model used in conjunction with the internal structure and parallel bundled wires;

[0042] Figure 7 for Figure 6 The schematic diagram of the structure in which the parallel bundled conductors are removed;

[0043] Figure 8 for Figure 7 A schematic diagram of the structure from another perspective;

[0044] Fig. 9 This is a schematic diagram of the appearance structure of another embodiment of the utility model;

[0045] Fig.10 for Fig. 9 A schematic diagram of the internal structure and the structure of the parallel bundled wires used in conjunction with each other;

[0046] Fig.11 for Fig.10 A schematic diagram of the structure from another perspective in which the parallel bundled wires are removed;

[0047] Fig.12 for Fig.11 A schematic diagram of the structure in another state;

[0048] Fig.13 A schematic diagram of a structure in which the adjusting shaft and the mounting seat of the utility model are installed in coordination;

[0049] Fig.14 It is a schematic cross-sectional view of parallel bundled conductors in the prior art.

[0050] In the figure: a mounting seat 101, a groove 1011, a through-cavity structure 102, a rotating handle 103, parallel bundled wires 104, a rotating gear 111, a driving roller 1, an auxiliary roller 2, a driving rotating disk 3, a sliding sleeve 4, a limiting rod 5, a connecting section 51, a sliding section 52, a transmission belt 6, an auxiliary turntable 7, a tensioning wheel 8, a cutting blade 9, a movable rod 10, a fixing rod 11, an eccentric shaft 12, an adjusting shaft 13, an auxiliary rod 131, a locking bolt 132, a mounting frame 14, a card slot 141, a first limiting shell 15, a first strip slide slot 151, a clamping wheel 16, an auxiliary wheel 17, a second limiting shell 18, a connecting rod 19, a rotating rod 20, a supporting frame 21, a card slot 211, a connecting shaft 22, a sliding rod 23, and a sliding rod 24. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0052] like Figure 1 As shown, a parallel bundled wire connecting rib cutting device includes a mounting base 101 and a wire transmission mechanism arranged on the mounting base 101 to drive the parallel bundled wires 104 to move along their length direction and a cutting mechanism for cutting the connecting ribs of the parallel bundled wires 104.

[0053] The structure of the mounting seat 101 can be set according to the needs, and its purpose is to facilitate the installation of the wire transmission mechanism and the cutting mechanism. To this end, the mounting seat 101 can adopt a box structure, a plate structure, a block structure or a frame structure, so that the wire transmission mechanism and the cutting mechanism are integrated on the mounting seat 101, which is convenient for the movement and use of the entire device. In this embodiment, the mounting seat 101 adopts a box structure of a through-cavity structure 102, and the mounting seat 101 is horizontally arranged, and the through-cavity structure 102 is horizontally arranged. The mounting seat 101 with a through-cavity structure 102 can facilitate the feeding and discharging of parallel bundled wires 104; at the same time, the mounting seat 101 with a box structure can set the cutting mechanism inside the mounting seat 101 to avoid the cutting mechanism from hurting people.

[0054] The wire transmission mechanism is used to move the parallel bundled wires 104 in the direction of the through cavity of the mounting seat 101 for feeding. During use, the parallel bundled wires 104 are arranged horizontally and fed in the horizontal direction. The wire transmission mechanism can adopt an existing linear feeding mechanism such as a transmission belt. In this embodiment, it is considered that the wire transmission mechanism needs to cooperate with the cutting mechanism for transmission, such as Figure 2 , 3 As shown, the wire transmission mechanism includes two driving rollers 1 and auxiliary rollers 2 that rotate relative to each other and are both rotatably connected to the mounting seat 101. The parallel bundled wires 104 are located between the driving rollers 1 and the auxiliary rollers 2. The driving rollers 1 rotate to drive the parallel bundled wires 104 to move along their length direction. The driving rollers 1 and the auxiliary rollers 2 are arranged at intervals in the vertical direction. Both ends of the driving rollers 1 and the auxiliary rollers 2 are rotatably connected to the inner wall of the mounting seat 101 through bearings. The driving rollers 1 and the auxiliary rollers 2 are arranged horizontally, and the length direction of the auxiliary rollers 2 is perpendicular to the length direction of the parallel bundled wires 104. When the driving rollers 1 and the auxiliary rollers 2 rotate relative to each other, the parallel bundled wires 104 can be guided along a preset path.

[0055] In order to realize the relative rotation of the driving roller 1 and the auxiliary roller 2, a servo motor can be provided on the driving roller 1 and the auxiliary roller 2 respectively. The two servo motors can be controlled to realize the same frequency and reverse rotation, so that the relative rotation of the driving roller 1 and the auxiliary roller 2 can be realized. Of course, combined with the relative rotation of the driving roller 1 and the auxiliary roller 2 to feed the material, there must be friction between the driving roller 1, the auxiliary roller 2 and the parallel bundled wire 104. When installed, a coaxially arranged driving motor can also be provided on the driving roller 1 or the auxiliary roller 2. The driving motor rotates, and under the action of friction, the driving roller 1 and the auxiliary roller 2 can also be driven to rotate relative to feed the parallel bundled wire 104. In this embodiment, a coaxially fixed rotating gear 111 is provided on the driving roller 1 and the auxiliary roller 2 respectively. The two rotating gears 111 are meshed, and the relative rotation of the driving roller 1 or the auxiliary roller 2 can be realized by rotating the driving roller 1 or the auxiliary roller 2. In another embodiment of the utility model, a method of manually moving the parallel bundled wire 104 is also provided, that is, one end of the driving roller 1 passes through the side wall of the mounting seat 101 and is connected to a rotating handle 103. When in use, the operator applies external force to the rotating handle 103 to drive the driving roller 1 to rotate. The driving roller 1 rotates, and the auxiliary roller 2 is driven to rotate under the action of the two rotating gears 111, so that the parallel bundled wires 104 between the driving roller 1 and the auxiliary roller 2 are moved to feed the material.

[0056] The parallel bundled wires 104 to be cut are moved under the action of the wire transmission mechanism. When the parallel bundled wires 104 are moved to the position of the cutting mechanism, the connecting ribs can be cut under the action of the cutting mechanism. The cutting mechanism and the wire transmission mechanism of the utility model are installed in coordination. Specifically, Figure 2 , 3 As shown, the cutting mechanism includes at least one cutting blade 9 and a driving assembly for driving the cutting blade 9 to move back and forth. The driving assembly is connected with the wire transmission mechanism so that while the parallel bundled wires 104 are moving, multiple cutting blades 9 simultaneously move back and forth to cut the connecting ribs of the parallel bundled wires 104.

[0057] The number of cutting blades 9 can be set according to needs. If the parallel bundled wires 104 need to be cut into two parts, one cutting blade 9 is sufficient; if the parallel bundled wires 104 need to be cut into three parts at one time, two cutting blades 9 are sufficient, and so on. The number of cutting blades 9 is selected according to needs.

[0058] During cutting, the wire transmission mechanism feeds the parallel bundled wires 104 to be cut along their length direction, and the parallel bundled wires 104 move to the position of the cutting blade 9. At this time, the cutting blade 9 can move back and forth under the cooperation of the driving assembly and the wire transmission mechanism. Considering the feeding direction of the parallel bundled wires 104, the setting position of the cutting blade 9 must be intersected with the length direction of the parallel bundled wires 104. Preferably, the setting method of the cutting blade 9 must be perpendicular to the length direction of the parallel bundled wires 104. At this time, the parallel bundled wires 104 continue to move, and the cutting blade 9 reciprocates along the length direction perpendicular to the parallel bundled wires 104 to cut the connecting ribs of the parallel bundled wires 104, thereby achieving the purpose of directional cutting of the connecting ribs of the parallel bundled wires 104.

[0059] In order to enable the cutting blade 9 to move up and down under the cooperation of the driving assembly and the wire transmission mechanism, the driving assembly of the utility model includes a limit rod 5, a connecting member and a rotating member. The cutting blade 9 is in a strip-shaped structure and is vertically arranged. The lower end of the cutting blade 9 passes through the limit rod 5 and is connected to the limit rod 5. The limit rod 5 is slidably arranged along the mounting seat 101. The limit rod 5 is divided into a connecting section 51 connected to the cutting blade 9 and a sliding section 52 sliding with the mounting seat 101. The sliding section 52 can be set as a slider. A vertically arranged sliding groove is opened on the inner wall of the mounting seat 101. The slider and the sliding groove cooperate to achieve the limitation of the reciprocating direction of the cutting blade 9. In this embodiment, the sliding section 52 is a rod-shaped structure. The rod-shaped structure passes through the sliding sleeve 4 fixed on the inner wall of the mounting seat 101. The sliding sleeve 4 is a vertically arranged sleeve structure. The cooperation between the sliding sleeve 4 and the sliding section 52 can also achieve the limitation of the reciprocating direction of the limit rod 5 and the cutting blade 9.

[0060] After the limiting rod 5 defines the vertical movement direction of the cutting blade 9, the cooperation of the connecting member and the rotating member is required to realize the up and down movement of the cutting blade 9. Specifically, in the present embodiment, the connecting member includes a movable rod 10 hinged to the cutting blade 9, an eccentric shaft 12 movably connected to the movable rod 10, and an auxiliary rotating disk. The circumferential surfaces of the eccentric shaft 12 and the auxiliary rotating disk 7 are fixed and located at the eccentric position of the auxiliary rotating disk 7; the rotating member includes a driving rotating disk 3 coaxially fixed to the driving roller 1 or the auxiliary roller 2 and a transmission belt 6 connecting the auxiliary rotating disk and the driving rotating disk 3. The driving roller 1 or the auxiliary roller 2 rotates, driving the auxiliary rotating disk 7 to rotate, driving the eccentric shaft 12 to move in a circle, and the movement of the eccentric shaft 12 drives the cutting blade 9 to move back and forth and at the same time drives the limiting rod 5 to slide back and forth on the mounting seat 101. Figure 2 , 3As shown, the driving rotating disk 3 and the driving roller 1 are coaxially arranged, the auxiliary rotating disk is located above the driving rotating disk 3, a coaxially fixed driving shaft is arranged on the circumferential surface of the auxiliary rotating disk, a fixing rod 11 is arranged along the circumference of the driving rotating disk 3 on the driving shaft, an eccentric shaft 12 is arranged horizontally along the length direction (Y direction) of the driving roller 1 and fixed to the fixing rod 11, and a movable rod 10 is arranged through the eccentric shaft 12. When in use, the driving roller 1 is driven to rotate by external force, which drives the driving rotating disk 3 and the auxiliary rotating disk to rotate, drives the fixing rod 11 to move in a circle, drives the eccentric shaft 12 to move in a circle, and then drives the cutting blade 9 to move up and down (Z direction), cooperates with the parallel bundled wires 104 of horizontal feeding (X direction), and realizes the cutting of the connecting ribs of the parallel bundled wires 104.

[0061] In another embodiment of the utility model, in order to adjust the up and down moving speed of the cutting blade 9, in this embodiment, the auxiliary rotating disk and the driving rotating disk 3 are both in a truncated cone structure, and the cone directions of the auxiliary rotating disk and the driving rotating disk 3 are opposite, and the transmission belt 6 is sleeved on the auxiliary rotating disk and the driving rotating disk 3 and moves along the truncated cone direction, and the transmission belt 6 sleeved on the auxiliary rotating disk and the driving rotating disk 3 is tensioned by the tensioning wheel 8 set on the mounting seat 101. The tensioning wheel 8 is rotatably set on the connecting frame, and the connecting frame and the inner wall of the mounting seat 101 are fixed. The auxiliary rotating disk and the driving rotating disk 3 of the truncated cone structure can achieve different levels of speed regulation. When the rotation speed of the driving roller 1 remains unchanged, the up and down moving speed of the cutting blade 9 can be changed, which is convenient for work and improves work efficiency and processing accuracy. The auxiliary rotating disk and the driving rotating disk 3 of the truncated cone structure are different from the cylindrical structure design. They can achieve multi-level speed regulation, and the conical design saves materials compared with the cylindrical design. During use, the presence of the tensioning wheel 8 can prevent the transmission belt 6 from moving away from its original position. In addition, in actual use, the transmission belt 6 will be wider and thinner than the structure shown in the figure. Under the action of the tensioning wheel 8, it is tightly attached to the transmission wheel and generally will not slip, thus achieving the transmission purpose.

[0062] It is worth noting that the connection between the limiting rod 5 and the cutting blade 9 can be fixed or movably connected; if the position adjustment of the cutting blade 9 is not considered, the cutting blade 9 and the limiting rod 5 can be fixedly connected; if the position of the cutting blade 9 along the length direction of the driving roller 1 is changed, the cutting blade 9 and the limiting rod 5 can be movably connected. For example, the cutting blade 9 is sleeved on the connecting section 51 of the limiting rod 5, and the connecting section 51 is arranged along the length direction of the driving roller 1. Then, the cutting blade 9 slides along the limiting rod 5, and the position adjustment of the cutting blade 9 along the length direction of the driving roller 1 can be realized.

[0063] Similarly, the movable rod 10 and the eccentric shaft 12 can be sleeved and hinged or sleeved and movable and hinged. If the position of the cutting blade 9 will not be adjusted along the Y direction, the movable rod 10 and the eccentric shaft 12 are hinged at a fixed point; if the position of the cutting blade 9 along the Y direction is changed, the movable rod 10 and the eccentric shaft 12 can be slidably connected and can be hinged at a fixed point after sliding. For example, the movable rod 10 is set to a screw structure, and a rotating hole sleeved on the eccentric shaft 12 is provided on the movable rod 10, and two nuts connected by threading are provided on the eccentric shaft 12, and the two nuts are respectively located on both sides of the movable rod 10. Then, by changing the position of the two nuts on the eccentric shaft 12, it can be achieved that the movable rod 10 and the eccentric shaft 12 can be slidably connected and can be hinged at a fixed point after sliding. Of course, the connection relationship between the cutting blade 9 and the limit rod 5 and the connection relationship between the movable rod 10 and the eccentric shaft 12 should be adapted to ensure that the position of the cutting blade 9 in the Y direction is fixed or adjustable.

[0064] The parallel bundled conductors 104 have a certain hardness, and the position of the connecting ribs is exactly in the middle of two adjacent wire cores. During the transmission of the parallel bundled conductors 104, the connecting ribs will not contact the driving roller 1 or the auxiliary roller 2. The rubber layer or plastic layer on the outer surface of the driving roller 1 and the auxiliary roller 2 can increase the friction. The parallel bundled conductors 104 are set between the driving roller 1 and the auxiliary roller 2, and the feeding can be carried out under the action of the relatively rotating driving roller 1 and the auxiliary roller 2. In this process, the cutting blade 9 can be set to one or more. This setting method requires positioning of the feeding of the parallel bundled conductors 104, and it is necessary to ensure that the position of the connecting ribs to be cut can be moved to the position of the cutting blade 9, which makes the positioning during the operation and cutting process inconvenient.

[0065] To solve the above problem, in another embodiment of the present invention, Figure 4-8As shown, both the driving roller 1 and the auxiliary roller 2 adopt a spline shaft structure, and at least two side-by-side clamping wheels 16 are sleeved on the driving roller 1 along its length direction, and the clamping wheels 16 move along the driving roller 1 and rotate with the driving roller 1; the auxiliary roller 2 is sleeved along its length direction with a plurality of side-by-side auxiliary wheels 17 of the same number as the clamping wheels 16, and the auxiliary wheels 17 move along the auxiliary roller 2 and rotate with the auxiliary roller 2; the plurality of clamping wheels 16 and the plurality of auxiliary wheels 17 are respectively used to clamp the cores of the parallel bundled wires 104, and the plurality of clamping wheels 16 rotate simultaneously to drive the parallel bundled wires 104 to move along their length direction, and the number of cutting blades 9 is one, and the cutting blade 9 is located in front of the movement of the parallel bundled wires 104 and between any two adjacent clamping wheels 16. Both the driving roller 1 and the auxiliary roller 2 adopt a spline shaft structure, which can realize that the clamping wheel 16 and / or the auxiliary wheel 17 move to a suitable position according to a preset direction to adapt to the structure of the parallel bundled wires 104 to be cut. The clamping wheel 16 can be adjusted manually to move along the driving roller 1, and a damping sliding method can be used between the two to prevent the clamping wheel 16 from moving along the length direction of the driving roller 1 during the rotation process after the position change. Alternatively, after the clamping wheel 16 moves along the driving roller 1, the clamping wheel 16 and the driving roller 1 can be locked with a locking screw to prevent the position of the clamping wheel 16 from further changing after the position change. Similarly, the adjustment method and connection method of the auxiliary roller 2 and the auxiliary wheel 17 can refer to the setting method of the clamping wheel 16 and the driving roller 1 to ensure that the auxiliary roller 2 after the position adjustment will not move along the length direction of the auxiliary roller 2 during the rotation process.

[0066] The clamping wheel 16 and the auxiliary wheel 17 used in conjunction with each other form a set of roller structures. Each set of roller structures is clamped and cooperated with a core of the parallel bundled conductor 104, so the roller structure can realize the positioning function. It is only necessary to ensure that after one of the cores of the parallel bundled conductor 104 is in place, the position of the entire parallel bundled conductor 104 at the driving roller 1 and the auxiliary roller 2 meets the feeding requirements. When the parallel bundled conductor 104 guides the material, the connecting ribs will be cut under the action of the cutting blade 9.

[0067] In another embodiment of the utility model, in order to facilitate the distance adjustment between two adjacent clamping wheels 16 and two auxiliary wheels 17, a distance adjustment component is also provided in this embodiment. The number of distance adjustment components can be set according to the use requirements. In theory, one distance adjustment component can meet the requirements, ensuring that the distance between the two clamping wheels 16 of the cutting blade 9 along the Y direction is adapted to the two adjacent wire cores of the parallel bundled wires 104 to be cut. Multiple distance adjustment components can also be provided to achieve simultaneous adjustment of the spacing between multiple clamping wheels 16 and multiple auxiliary rollers 2, making it more convenient to guide the parallel bundled wires 104 smoothly.

[0068] like Figure 4 , 5As shown, it is a structure when a distance adjustment component is set, and the distance adjustment component is used to adjust the distance between the two clamping wheels 16 and the two auxiliary tubes that match the cutting blade 9. The distance adjustment component includes a main component for adjusting the distance between the clamping wheels 16 and a secondary component for adjusting the distance between the auxiliary wheels 17. The main component includes a mounting frame 14, an adjustment shaft 13 rotatably arranged on the mounting frame 14, and a connecting rod 19 fixed on the adjustment shaft 13, and the two ends of the connecting rod 19 are respectively slidably arranged on the two clamping wheels 16 that match the cutting blade 9; the secondary component includes a support frame 21, a connecting shaft 22 rotatably arranged on the support frame 21, and a rotating rod 20 fixed on the connecting shaft 22, and the two ends of the rotating rod 20 are respectively slidably arranged on the two auxiliary wheels 17 that match the two clamping wheels 16. The mounting frame 14 and the support frame 21 can be fixedly connected to the inside of the mounting seat 101. A servo motor can be set at the end of the adjusting shaft 13 and the connecting shaft 22, and the servo motor is fixed to the inside of the mounting seat 101, so that the rotation and braking of the adjusting shaft 13 and the connecting shaft 22 can be realized by electric control. When in use, the servo motor drives the adjusting shaft 13 to rotate, and the adjusting shaft 13 rotates, driving the connecting rod 19 to rotate. The two ends of the connecting rod 19 move on the two matching clamping wheels 16, forcing the distance between the two clamping wheels 16 to change, thereby achieving the purpose of adjusting the distance between the two clamping wheels 16; similarly, the rotation of the rotating shaft can achieve the adjustment of the distance between the two matching auxiliary wheels 17.

[0069] Of course, the adjusting shaft 13 is rotated manually, so the adjusting shaft 13 needs to be provided with a locking structure for use, such as Fig.13 As shown, a vertically connected auxiliary rod 131 can be fixed on the adjustment shaft 13, and a locking bolt 132 is threadedly connected to the auxiliary rod 131. A groove 1011 with a circular ring structure is set on the inner wall of the mounting seat 101, and the locking bolt 132 is embedded in the groove 1011. When the locking bolt 132 is rotated to separate the locking bolt 132 and the bottom of the groove 1011, the adjustment shaft 13 is unlocked, and the adjustment shaft 13 can be rotated by external force. The rotation of the adjustment shaft 13 drives the connecting rod 19 to rotate. The connecting rod 19 rotates so that its two ends move on the two matching clamping wheels 16, forcing the distance between the two clamping wheels 16 to change, thereby adjusting the distance between the two clamping wheels 16. Similarly, the rotation of the rotating shaft can adjust the distance between the two matching auxiliary wheels 17.

[0070] The distance adjustment component can also be set to multiple, such as Figure 6 , 7As shown, in another embodiment of the utility model, a cutting blade 9, four clamping wheels 16, four auxiliary wheels 17 and three distance adjustment components are provided, and the structures of the three distance adjustment components are the same. The ends of two adjacent connecting rods 19 are hinged, and only the end of one of the connecting rods 19 is slidably arranged with the matching clamping wheel 16; similarly, the ends of two adjacent rotating rods 20 are hinged, and only the end of one of the rotating rods 20 is slidably arranged with the matching auxiliary wheel 17. When in use, by rotating any adjusting shaft 13, the three connecting rods 19 can be rotated at the same time, thereby realizing the simultaneous adjustment of the distance between any two adjacent clamping wheels 16 among the four clamping wheels 16; similarly, by rotating any rotating shaft, the distance between any two adjacent auxiliary wheels 17 among the four auxiliary wheels 17 can also be adjusted at the same time. After adjustment, the multiple auxiliary wheels 17 and the multiple clamping wheels 16 are respectively arranged relative to each other to ensure that they can be used in conjunction with the parallel bundled wires 104.

[0071] In another embodiment of the present invention, if there are multiple cutting blades 9, when adjusting the spacing between the multiple clamping wheels 16, it is also necessary to adjust the positions of the multiple cutting blades 9 to ensure that each cutting blade 9 is located at the connecting rib position of the parallel bundled wires 104. In order to realize cutting N parallel bundled conductors 104 into N-1 parts at one time, in this embodiment, the driving roller 1 and the auxiliary roller 2 both adopt a spline shaft structure. The driving roller 1 is provided with N clamping wheels 16 arranged side by side along its length direction. The clamping wheels 16 move along the driving roller 1 and rotate with the driving roller 1; the auxiliary roller 2 is provided with N auxiliary wheels 17 arranged side by side along its length direction. The auxiliary wheels 17 move along the auxiliary roller 2 and rotate with the auxiliary roller 2; wherein N is a natural number greater than 2; the N clamping wheels 16 and the N auxiliary wheels 17 are respectively used to clamp the wire cores of the parallel bundled conductors 104, and the N clamping wheels 16 rotate simultaneously to drive the parallel bundled conductors 104 to move along their length direction; the number of cutting blades 9 is N-1, and any cutting blade 9 is located in front of the movement of the parallel bundled conductors 104 and between any two adjacent clamping wheels 16. Figure 9-12 As shown, this embodiment is provided with three cutting blades 9, four clamping wheels 16 and four auxiliary wheels 17. The connection mode of the four clamping wheels 16 and the driving roller 1 is as described in the above content, so that the clamping wheels 16 can move along the driving roller 1 and rotate at the same time; the connection mode of the four auxiliary wheels 17 and the auxiliary roller 2 is as described in the above content, so that the auxiliary wheels 17 can move along the auxiliary roller 2 and rotate at the same time.

[0072] In order to facilitate the synchronous position adjustment of the three cutting blades 9, four pressure wheels 16 and four auxiliary wheels 17, another embodiment of the utility model further includes three distance adjustment components, each of which includes a main component and an auxiliary component. The main component includes a mounting frame 14, an adjustment shaft 13 rotatably arranged on the mounting frame 14, and a connecting rod 19 fixed on the adjusting shaft 13, the two ends of the connecting rod 19 are respectively slidably arranged on any two adjacent pressure wheels 16, the mounting frame 14 and the cutting blade 9 cooperating with the two adjacent pressure wheels 16 are positioned and slid, and the two connecting rods 19 of the two adjacent main components are hinged; the auxiliary component includes a support frame 21, a connecting shaft 22 rotatably arranged on the support frame 21, and a rotating rod 20 fixed on the connecting shaft 22, the two ends of the rotating rod 20 are respectively slidably arranged on the two auxiliary wheels 17 cooperating with the two pressure wheels 16, the support frame 21 and the cutting blade 9 cooperating with the two adjacent auxiliary wheels 17 are positioned and slid, and the two rotating rods 20 of the two adjacent auxiliary components are hinged. Figure 10-12 As shown, three mounting frames 14 are arranged side by side and sleeved on the sliding rod 23 fixed in the mounting seat 101 and can slide along the sliding rod 23; and the three mounting frames 14 are respectively provided with a clamping groove 141 for clamping three cutting blades 9, ensuring that the three mounting frames 14 are respectively matched with the three cutting blades 9, and can drive the corresponding cutting blades 9 to move during the position change of the mounting frame 14. At the same time, three supporting frames 21 are arranged side by side, and the three supporting frames 21 are sleeved on the sliding rod 24 fixed in the mounting seat 101 and can slide along the sliding rod 24; the three supporting frames 21 are respectively provided with a clamping groove 211 for clamping three cutting blades 9, ensuring that the three supporting frames 21 are respectively matched with the three cutting blades 9, so that when the position of the cutting blade 9 changes under the action of the mounting frame 14, the supporting frame 21 can also change with the position change of the cutting blade 9, so that only the position of the cutting blade 9, the supporting frame 21 or the mounting frame 14 needs to be changed, and the position of the matched cutting blade 9, the supporting frame 21 and the mounting frame 14 can be changed synchronously. Therefore, during use, by simply rotating any adjustment shaft 13 as required, the positions of the three cutting blades 9, the four clamping wheels 16 and the four auxiliary wheels 17 can be synchronously adjusted through the action of the three distance adjustment components. It is worth noting that since the positions of the multiple cutting blades 9 need to be adjusted in the Y direction, the lower end of the cutting blade 9 is slidably connected to the limit rod 5, and the movable rod 10 is movably connected to the eccentric shaft 12.

[0073] The setting of the distance adjustment component can ensure that the cutting blade 9 and the central axis of the connecting rib of the parallel bundled wires 104 to be cut are aligned to adapt to the cutting of different types of parallel bundled wires 104, and can well ensure the accuracy and flatness of the cutting.

[0074] In another embodiment of the utility model, in order to facilitate the sliding of the connecting rod 19 on the pressing wheel 16, in this embodiment, a first limit housing 15 connected to the pressing wheel 16 is provided with a rotational connection, and a first strip-shaped slide groove 151 perpendicular to the length direction of the driving roller 1 is provided on the first limit housing 15. The end of the connecting rod 19 is embedded in the first strip-shaped slide groove 151 and moves along the length direction of the first strip-shaped slide groove 151. Figure 4 , 5 As shown in FIGS. 6, 7, 8, 10, 11 and 12, the first limiting housing 15 is located above the pressing wheel 16, and the inner wall of the first limiting housing 15 is provided with a rotation space for the pressing wheel 16 to rotate; the first strip-shaped slide groove 151 is located on the upper surface of the first limiting housing 15, and the end of the connecting rod 19 is embedded in the first strip-shaped slide groove 151. In theory, the rotation of the connecting rod 19 can change the spacing between two adjacent pressing wheels 16, but in this process, it is also necessary to ensure that the movement of the first limiting housing 15 can drive the pressing wheel 16 to move, and at the same time, it does not affect the rotation of the pressing wheel 16, and the first limiting housing 15 can move along the length direction of the driving roller 1. Therefore, in this embodiment, in order to realize the rotational connection between the first position-limiting shell 15 and the pressure wheel 16, a convex slider can be provided on the inner wall of the rotation space, and a circular concave groove can be provided on the circumferential side of the pressure wheel 16. The slider is embedded in the concave groove and slidably connected with the concave groove. The center of the concave groove and the axis of the pressure wheel 16 are colinear, so that the rotational connection between the first position-limiting shell 15 and the pressure wheel 16 can be realized. Of course, in order to enable the first position-limiting shell 15 to move along the length direction of the driving roller 1 to drive the pressure wheel 16 to move, the first position-limiting shell 15 can also be slidably limited. A mounting rod set along the length direction of the driving roller 1 can be provided inside the mounting seat 101. By slidably connecting multiple first position-limiting shells 15 and the mounting rod, the first position-limiting shell 15 can be always located above the pressure wheel 16, and the pressure wheel 16 can also be driven to move.

[0075] Similarly, in order to facilitate the sliding of the rotating rod 20 on the auxiliary wheel 17, the second limiting shell 18 rotatably connected is provided on the outer periphery of the auxiliary wheel 17 in this embodiment. The second limiting shell 18 is provided with a second strip slide groove perpendicular to the length direction of the auxiliary roller 2. The end of the rotating rod 20 is embedded in the second strip slide groove and moves along the length direction of the second strip slide groove. The second limiting shell 18 is located below the auxiliary wheel 17, and the inner wall of the second limiting shell 18 is provided with a rotating space for the auxiliary wheel 17 to rotate; the second strip slide groove is located on the lower surface of the second limiting shell 18, and the end of the rotating rod 20 is embedded in the second strip slide groove. Among them, the connection structure of the second limiting shell 18, the mounting seat 101, and the auxiliary wheel 17 can refer to the installation structure of the first limiting shell 15, the mounting seat 101, and the clamping wheel 16. Then, the rotation of the rotating rod 20 can drive the distance between the two adjacent auxiliary wheels 17 along the length direction of the auxiliary roller 2 to change, thereby achieving the purpose of adjusting the distance.

[0076] Working principle:

[0077] When in use, according to the type of the wire, the adjusting shaft 13 is manually or electrically rotated so that the connecting rod 19 rotates to change the spacing of the clamping wheel 16 to a rough position; if the spacing of the auxiliary wheel 17 needs to be adjusted separately, the position of the auxiliary wheel 17 is adapted to the position of the clamping wheel 16 in the same way as the adjusting shaft 13. Then the wire is fed from the through-cavity structure 102 of the mounting seat 101, and the wire core enters between the clamping wheel 16 and the auxiliary wheel 17. At this time, the adjusting shaft 13 is rotated again to adjust the clamping wheel 16 and the auxiliary wheel 17 to the optimal position; at this time, the position of the movable rod 10 and the eccentric shaft 12 needs to be locked, and the adjusting shaft 13 and / or the connecting shaft 22 need to be locked. Then, the driving roller 1 is driven manually or electrically to rotate, driving the wire to feed along the preset path. The rotation of the driving roller 1 can drive the auxiliary rotating disk and the eccentric shaft 12 to rotate, so that the cutting blade 9 moves back and forth in the vertical direction to cut the connecting ribs of the parallel bundled wires 104, completing the cutting work of the wire connecting ribs.

[0078] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A parallel bundled wire connecting rib cutting device, characterized in that: It comprises a mounting seat (101), a wire transmission mechanism arranged on the mounting seat (101) for driving the parallel bundled wires (104) to move in the length direction thereof, and a cutting mechanism for cutting the connecting ribs of the parallel bundled wires (104); The cutting mechanism comprises at least one cutting blade (9) and a driving assembly for driving the cutting blade (9) to move back and forth. The driving assembly is cooperatively connected with the wire transmission mechanism so that while the parallel bundled wires (104) are moving, the plurality of cutting blades (9) simultaneously move back and forth to cut the connecting ribs of the parallel bundled wires (104).

2. The parallel bundled wire connecting rib cutting device according to claim 1, characterized in that: The wire transmission mechanism comprises two driving rollers (1) and an auxiliary roller (2) which rotate relative to each other and are both rotatably connected to a mounting seat (101); the parallel bundled wires (104) are located between the driving rollers (1) and the auxiliary rollers (2); the driving rollers (1) rotate to drive the parallel bundled wires (104) to move along their length direction; wherein the cutting blades (9) are located in front of the parallel bundled wires (104) moving.

3. The parallel bundled wire connecting rib cutting device according to claim 2, characterized in that: The driving assembly comprises a limiting rod (5), a connecting member and a rotating member. The cutting blade (9) is connected to the limiting rod (5), and the limiting rod (5) is slidably arranged along the mounting seat (101); The connecting member comprises a movable rod (10) hinged to the cutting blade (9), an eccentric shaft (12) movably connected to the movable rod (10), and an auxiliary rotating disk, wherein the circumferential surfaces of the eccentric shaft (12) and the auxiliary rotating disk (7) are fixed and located at an eccentric position of the auxiliary rotating disk (7); The rotating member drives the auxiliary rotating disk (7) to rotate, thereby driving the eccentric shaft (12) to move in a circular manner. The movement of the eccentric shaft (12) drives the cutting blade (9) to move back and forth and simultaneously drives the limiting rod (5) to slide back and forth on the mounting seat (101).

4. The parallel bundled wire connecting rib cutting device according to claim 2, characterized in that: The rotating member comprises a driving rotating disc (3) fixed coaxially with the driving roller (1) or the auxiliary roller (2) and a transmission belt (6) connecting the auxiliary rotating disc and the driving rotating disc (3); the driving roller (1) or the auxiliary roller (2) rotates, thereby driving the auxiliary rotating disc (7) to rotate.

5. The parallel bundled wire connecting rib cutting device according to claim 4, characterized in that: The auxiliary rotating disk and the driving rotating disk (3) are both truncated cone structures, and the auxiliary rotating disk and the driving rotating disk (3) are arranged in opposite directions of the cones. The transmission belt (6) is sleeved on the auxiliary rotating disk and the driving rotating disk (3) and moves along the truncated cone direction, and the transmission belt (6) sleeved on the auxiliary rotating disk and the driving rotating disk (3) is tensioned by a tensioning wheel (8) provided on the mounting seat (101).

6. A parallel bundled wire connecting rib cutting device according to any one of claims 2 to 5, characterized in that: At least two clamping wheels (16) are sleeved on the driving roller (1) along its length direction, and are arranged side by side. The clamping wheels (16) move along the driving roller (1) and rotate along with the driving roller (1); A plurality of auxiliary wheels (17) arranged side by side are sleeved on the auxiliary roller (2) along its length direction, the number of which is the same as the number of the pressing wheels (16); the auxiliary wheels (17) move along the auxiliary roller (2) and rotate with the auxiliary roller (2); A plurality of clamping wheels (16) and a plurality of auxiliary wheels (17) are respectively used to clamp the wire cores of the parallel bundled wires (104). The plurality of clamping wheels (16) rotate simultaneously to drive the parallel bundled wires (104) to move along their length direction. The number of cutting blades (9) is one, and the cutting blade (9) is located in front of the movement of the parallel bundled wires (104) and between any two adjacent clamping wheels (16).

7. The parallel bundled wire connecting rib cutting device according to claim 6, characterized in that: The invention also comprises at least one distance adjustment component, wherein the distance adjustment component comprises a main component for adjusting the distance between the pressure wheels (16) and a secondary component for adjusting the distance between the auxiliary wheels (17). The main component comprises a mounting frame (14), an adjusting shaft (13) rotatably arranged on the mounting frame (14), and a connecting rod (19) fixed on the adjusting shaft (13), and two ends of the connecting rod (19) are respectively slidably arranged on two pressing wheels (16) matched with the cutting blade (9); The auxiliary component comprises a support frame (21), a connecting shaft (22) rotatably arranged on the support frame (21), and a rotating rod (20) fixed on the connecting shaft (22); both ends of the rotating rod (20) are respectively slidably arranged on two auxiliary wheels (17) matched with the two clamping wheels (16).

8. A parallel bundled conductor connection rib cutting device according to any one of claims 2 to 5, characterized in that: The driving roller (1) is sleeved with N clamping wheels (16) arranged side by side along its length direction, and the clamping wheels (16) move along the driving roller (1) and rotate with the driving roller (1); The auxiliary roller (2) is sleeved with N parallel auxiliary wheels (17) along its length direction, and the auxiliary wheels (17) move along the auxiliary roller (2) and rotate with the auxiliary roller (2); Wherein, N is a natural number greater than 2; N clamping wheels (16) and N auxiliary wheels (17) are respectively used to clamp the wire cores of the parallel bundled wires (104), and the N clamping wheels (16) rotate simultaneously to drive the parallel bundled wires (104) to move along their length direction; the number of cutting blades (9) is N-1, and any cutting blade (9) is located in front of the movement of the parallel bundled wires (104) and between any two adjacent clamping wheels (16).

9. The parallel bundled wire connecting rib cutting device according to claim 8, characterized in that: It also includes N-1 distance adjustment components, each of which includes a main component and a sub-component. The main component comprises a mounting frame (14), an adjusting shaft (13) rotatably arranged on the mounting frame (14), and a connecting rod (19) fixed on the adjusting shaft (13); both ends of the connecting rod (19) are respectively slidably arranged on any two adjacent pressing wheels (16); the mounting frame (14) and the cutting blade (9) matched with the two adjacent pressing wheels (16) are positioned and slidably arranged; and the two connecting rods (19) of the two adjacent main components are hinged; The auxiliary component comprises a support frame (21), a connecting shaft (22) rotatably arranged on the support frame (21), and a rotating rod (20) fixed on the connecting shaft (22); the two ends of the rotating rod (20) are respectively slidably arranged on two auxiliary wheels (17) matched with two clamping wheels (16); the support frame (21) and the cutting blade (9) matched with the two adjacent auxiliary wheels (17) are positioned and slidably moved; and the two rotating rods (20) of the two adjacent auxiliary components are hinged.

10. The parallel bundled wire connecting rib cutting device according to claim 9, characterized in that: A first limiting shell (15) is rotatably connected to the outer periphery of the clamping wheel (16), and a first strip-shaped slide groove (151) perpendicular to the length direction of the driving roller (1) is provided on the first limiting shell (15), and the end of the connecting rod (19) is embedded in the first strip-shaped slide groove (151) and moves along the length direction of the first strip-shaped slide groove (151); A second limiting shell (18) is rotatably connected to the outer periphery of the auxiliary wheel (17), and a second strip-shaped slide groove perpendicular to the length direction of the auxiliary roller (2) is provided on the second limiting shell (18). The end of the rotating rod (20) is embedded in the second strip-shaped slide groove and moves along the length direction of the second strip-shaped slide groove.

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