Reinforcing steel bar straightening and cutting-off equipment

Abstract

The utility model discloses reinforcing steel bar straightening and cutting equipment which mainly comprises a straightening mechanism, a power mechanism and a feeding mechanism. The steel bar straightening and cutting device is mainly used for straightening and cutting coiled steel bars according to actual construction requirements before engineering project construction. A coiled coil screw leaving a factory is placed on the feeding support, the arc-shaped plate on the support is opened and closed through the tensioner to clamp the coil screw, then the end of the coil screw is fed into the straightening mechanism, steel bars are pulled inwards along with the straightening mechanism, the support automatically rotates at the matched speed, coil screw feeding is smoother, and knotting and jamming of the coil screw are reduced; and the spring worm is arranged as a transmission device, so that the damage to equipment caused by protruding or sudden tightening when the coiled screws are straightened, cut off and clamped is reduced, and the coiled screw feeding process is more controllable. According to the equipment, the problems of knotting and jamming of the coiled screws caused by direct placement on the ground during feeding during straightening and cutting of the reinforcing steel bars are solved, the production efficiency can be improved, manual operation is reduced, and equipment damage is reduced.

Description

Technical Field

[0001] The present application relates to the field of steel bar processing, and in particular to a steel bar straightening and cutting device. Background Art

[0002] A large amount of coiled steel bars are needed in infrastructure and house construction projects. Coiled steel bars of different lengths are used due to different locations and functions. Coiled steel bars are often sold in coils when leaving the factory. Therefore, the coiled steel bars need to be straightened and cut at the project site. Traditional coiled steel bar straightening and cutting equipment often directly places the coiled coils at the front end of the straightening and cutting equipment when feeding, and directly feeds the end into the equipment. The coils are pulled up in a circular shape. This form often easily causes the coils to become knotted or stuck when entering the equipment, which not only has a great impact on work efficiency, but also easily causes equipment damage and causes economic losses. Therefore, a steel bar straightening and cutting device with a rotatable feeding mechanism is needed, for example, a steel bar straightening and cutting device with publication number: CN108453198B, whose structure includes a workbench and a controller, and a straightening mechanism, a feeding mechanism, a cutting mechanism and a unloading mechanism which are arranged on the workbench in sequence and allow the steel bars to pass through in sequence; it is characterized in that: the workbench includes a front bracket, a cutting knife platform and a plurality of vertical brackets arranged in sequence, the rear side of the vertical bracket is provided with a hanging rod perpendicular to the vertical bracket, a sliding wheel is coaxially arranged on the hanging rod, and the middle part of the sliding wheel has an annular positioning groove; the straightening mechanism is arranged on the front bracket, including a plurality of straightening roller groups arranged in a transverse interval; the feeding mechanism is arranged behind the straightening mechanism, including two feeding rollers arranged up and down, the two feeding rollers are linked by meshing gears, and there is a feeding gap between the two feeding rollers for allowing the steel bars to pass through, and one of the feeding rollers is connected to a first driving mechanism that drives it to rotate. The above-mentioned straightening and cutting device only plays the role of ordinary straightening and cutting of steel bars, and has no feeding mechanism to prevent knotting and jamming of steel bars during feeding. Therefore, the present application designs a steel bar straightening and cutting device that can reduce knotting and jamming of coiled steel bars during feeding. Utility Model Content

[0003] The utility model aims to provide a steel bar straightening and cutting device, aiming to solve the above-mentioned problems.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a steel bar straightening and cutting device, comprising an equipment box and a feeding mechanism for an elastic rotating conveying disc screw that can be opened and closed; a straightening mechanism, a power mechanism, a cutting mechanism and a discharging wheel are arranged in the equipment box; the straightening mechanism and the cutting mechanism are arranged horizontally inside the equipment box, the power mechanism is fixedly arranged at the lower part of the equipment box, the feeding mechanism is fixedly arranged at the front side of the equipment box, and the discharging wheel is fixedly arranged at the rear part of the equipment box; the feeding mechanism clamps the disc screw steel bar by opening and closing to rotate, so that the power mechanism drives the straightening mechanism to push the steel bar into the equipment box for straightening, and the cutting mechanism cuts the straightened steel bar by the drive of the power mechanism.

[0005] Furthermore, the feeding mechanism includes a steel frame, a driving device and an opening and closing device that can open and close the coiled steel bar, the driving device is fixedly connected to the steel frame, the opening and closing device is fixedly connected to the driving device through a long rod to realize power transmission, and the driving device includes a fixed rod, a fixed block, a motor bracket, a first motor, a gear and a spring worm; the motor bracket is fixedly connected to the steel frame, the first motor is arranged on the motor bracket, one end of the spring worm is fixedly connected to the output end of the first motor; the other end is movably connected to one end of the fixed block, the other end of the fixed block is fixedly connected to the steel frame, and one end of the fixed rod is fixedly connected to the steel frame; the other end side is movably connected to the middle of the gear to realize fixing the transmission device on the steel frame. The gear is engaged with the spring worm. To realize the rotation of the feeding mechanism and absorb the impact force through the spring worm when the equipment stops suddenly or the coiled steel bar is stuck in the equipment box, protect the equipment, and reduce equipment damage.

[0006] Furthermore, the spring worm includes a spring and a rotating rod, the spring is engaged with the gear, a fixing hole for fixing the spring is provided on the rotating rod, the spring sleeve is placed on the rotating rod and is close to the rotating rod, and both ends of the spring are inserted into the fixing hole and fixedly connected. This prevents the spring from being separated from the rotating rod due to stress during the transmission process. One end of the rotating rod is fixedly connected to the output end of the first motor, and the other end is movably connected to the fixed block. The opening and closing device includes a rotating wheel, an arc-shaped support plate and a tensioner. The rotating wheel is fixedly connected to one end of the long rod, and the other end of the long rod is fixedly connected to the middle of the gear; one end of the tensioner is fixedly connected to the rotating wheel; and the other end is fixedly connected to the arc-shaped support plate. A tensioner and an arc-shaped support plate form a group and are distributed along the rotating wheel at intervals of 120 degrees, with a total of three groups. The tensioner includes screw A, screw B, threaded ring A, threaded ring B and a connecting piece. The lower end of screw B is fixedly connected to the rotating wheel. Screw A and screw B are semi-screw structures, and the missing parts fit each other. The thread directions of screw A and screw B are opposite. Screw A is threadedly connected to threaded ring A, screw B is threadedly connected to threaded ring B, and threaded ring A and threaded ring B are fixedly connected through the connecting piece. The rotation of the connecting piece drives screw A to push the arc support plate upward to achieve the clamping of the coiled steel bar, so that the rotating wheel can drive the coiled steel bar to rotate.

[0007] Furthermore, the equipment box is also provided with a feed port for allowing unprocessed coiled steel bars to enter the equipment, and a discharge port for the coiled steel bars to exit the equipment after the straightening and cutting process is completed. The feed port is fixedly arranged on one side of the equipment box close to the feed mechanism; the other side is fixedly provided with a discharge port. In order to realize the feeding and processing of the coiled steel bars. The power mechanism includes a second motor, a reciprocating motor, a first transmission belt and a second transmission belt. The second motor and the reciprocating motor are arranged at the lower part of the equipment box. The second motor transmits power to the straightening mechanism through the first transmission belt, and the reciprocating motor transmits power to the cutting mechanism through the second transmission belt. The straightening mechanism includes a plurality of fixed frames, a pressure wheel group and a bottom wheel group. The bottom wheel group and the pressure wheel group are both installed inside the equipment box through the fixed frame. The pressure wheel group and the bottom wheel group are arranged relative to each other, and the coiled steel bars can be straightened for multiple times to improve the quality of the steel bars. The bottom wheel group includes a transmission bottom wheel, and the transmission bottom wheel is connected to the output end of the second motor through the first transmission belt. The coiled steel bar is pulled to move inside the equipment box; the cutting mechanism includes a base and a cutting knife driven by a reciprocating motor to reciprocate up and down to cut the coiled steel bar. The base is fixedly arranged on the lower wall of the equipment box, and the cutting knife is connected to the output end of the reciprocating motor through a second transmission belt.

[0008] Compared with the prior art, it has the following beneficial effects:

[0009] The utility model provides a steel bar straightening and cutting device, which controls the feeding speed of the coiled steel bar through the cooperation of the feeding mechanism and the straightening mechanism, clamps the coiled steel bar hung on the feeding mechanism by setting a tensioner and an arc support plate, and then drives the rotating wheel to rotate the coiled steel bar through a driving device, which can effectively reduce the occurrence of knotting and jamming of the coiled steel bar when the straightening mechanism is feeding, making the steel bar feeding process smoother and more controllable, improving the steel bar processing efficiency, shortening the construction period, and avoiding the possible safety hazards caused by the coiled steel bar being out of control. By setting a spring worm to drive the rotating wheel to rotate, the impact force on the equipment when the straightening and cutting equipment is stuck is reduced, which greatly improves the service life of the equipment, reduces the construction period delay caused by equipment damage and the decline in steel bar quality caused by the sudden tightening of the coiled steel bar, and reduces the waste of raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a front view of a steel bar straightening and cutting device of the utility model;

[0011] Figure 2 It is a partial enlarged schematic diagram of A of the utility model;

[0012] Figure 3 This is a schematic diagram of a driving device and an opening and closing device of a steel bar straightening and cutting device of the utility model;

[0013] Figure 4This is a front view of an opening and closing device of a steel bar straightening and cutting device of the utility model;

[0014] Figure 5 This is a schematic diagram of a tensioner of a steel bar straightening and cutting device of the utility model;

[0015] Figure 6 The utility model is a schematic diagram of a tensioner screw of a steel bar straightening and cutting device.

[0016] In the figure: 1-equipment box; 11-discharging wheel; 12-feeding port; 13-discharging port; 2-feeding mechanism; 21-steel frame; 22-driving device; 221-fixing rod; 222-fixing block; 223-motor bracket; 224-first motor; 225-gear; 226-spring worm; 2261-spring; 2262-rotating rod; 2263-fixing hole; 23-opening and closing device; 231-rotating wheel; 232-arc support plate; 233-sheet Tightener; 2331-screw A; 2332-screw B; 2333-threaded ring A; 2334-threaded ring B; 2335-connector; 24-long rod; 3-straightening mechanism; 31-fixed frame; 32-pressure wheel group; 33-bottom wheel group; 331-transmission bottom wheel; 4-power mechanism; 41-second motor; 42-reciprocating motor; 43-first transmission belt; 44-second transmission belt; 5-cutting mechanism; 51-base; 52-cutting knife. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figures 1 to 6 As shown, the utility model provides the following technical solutions: a steel bar straightening and cutting device, comprising an equipment box 1 and a feeding mechanism 2 for elastically rotating and conveying coils that can be opened and closed; the equipment box 1 is provided with a straightening mechanism 3 for straightening the coiled steel bars by up and down bidirectional pressure, a cutting mechanism 5 for cutting the steel bars by up and down reciprocating motion, a power mechanism 4 for providing power to the straightening mechanism 3 and the cutting mechanism 5, and a discharging wheel 11 for conveying the cut coiled steel bars out of the device; the straightening mechanism 3 and the cutting mechanism 5 are arranged horizontally inside the equipment box 1, the power mechanism 4 is fixedly arranged at the lower part of the equipment box 1, the feeding mechanism 2 is fixedly arranged at the front side of the equipment box 1, and the discharging wheel 11 is fixedly arranged at the rear part of the equipment box 1; the feeding mechanism 2 rotates by opening and closing the coiled steel bars to cooperate with the straightening mechanism 3 for feeding.

[0019] As another example, Figures 2 to 6As shown, the feeding mechanism 2 includes a steel frame 21, a driving device 22 and an opening and closing device 23 that can open and close the coiled steel bars. The steel frame 21 is in a semi-open form, which is convenient for the operator to hang the rolled coiled steel frame on the opening and closing device 23; the driving device 22 is fixedly connected to the steel frame 21, and the opening and closing device 23 is fixedly connected to the driving device 22 through a long rod 24 to realize power transmission, so that the opening and closing device 23 rotates. The driving device 22 includes a fixed rod 221, a fixed block 222, a motor bracket 223, a first motor 224, a gear 225, and a spring worm 226 that can reduce the impact of steel bar jamming on the equipment; the motor bracket 223 is fixedly connected to the lower part of the steel frame 21, the first motor 224 is arranged on the motor bracket 223, one end of the spring worm 226 is fixedly connected to the output end of the first motor 224; the other end is movably connected to one end of the fixed block 222, the other end of the fixed block 222 is fixedly connected to the steel frame 21, one end of the fixed rod 221 is fixedly connected to the steel frame 21, and the other end side is movably connected to the middle part of the gear 225, and the gear 225 is engaged with the spring worm 226. After the first motor 224 is started, the spring worm 226 is driven to rotate and then the gear 225 is driven to rotate. The spring worm 226 can rotate the feeding mechanism 2 and can absorb the impact force through the spring worm 226 when the equipment stops suddenly or the coiled steel bar is jammed in the equipment box 1, so as to protect the equipment and reduce equipment damage. The spring worm gear 226 includes a spring 2261 and a rotating rod 2262, one end of the rotating rod 2262 is fixedly connected to the output end of the first motor 224; the other end is movably connected to the fixed block 222; the rotating rod 2262 is provided with a fixing hole 2263 for fixing the spring 2261, the spring 2261 is sleeved on the rotating rod 2262 and is tightly attached to the rotating rod 2262, the spring 2262 is engaged with the gear 224, and the two ends of the spring 2261 are deeply inserted into the fixing hole 2463 and fixedly connected; to prevent the spring 2261 from being separated from the rotating rod 2262 or failing to complete the engagement with the gear 224 due to stress during the transmission process. The opening and closing device 23 includes a rotating wheel 231, three groups of arc-shaped support plates 232 and three groups of tensioners 233. The middle part of the rotating wheel 231 is cylindrical, and the outer circle is a fan-shaped design distributed at 120-degree intervals. The rotating wheel 231 is fixedly connected to one end of the long rod 25, and the other end of the long rod 25 is fixedly connected to the middle of the gear 225; one end of the tensioner 233 is fixedly connected to the rotating wheel 231; and the other end is fixedly connected to the arc-shaped support plate 232. A tensioner 233 and an arc-shaped support plate 232 form a group, which are distributed between the sectors of the rotating wheel 231 at 120-degree intervals along the rotating wheel 231, and there are three groups in total to form an arc. In order to achieve the support of the coiled steel bars, and the opening and closing design is convenient for the operator to hang the coiled steel bars with different inner diameters on the opening and closing device 23.The tensioner 233 includes a screw A2331, a screw B2332, a threaded ring A2333, a threaded ring B2334 and a connecting piece 2335. The lower end of the screw B2334 is fixedly connected to the rotating wheel 231. The screw A2331 and the screw B2332 are semi-screw structures, and the missing parts fit each other to prevent the screw A2331 from rotating. The screw A2331 and the screw B2332 have opposite thread directions. The screw A2331 is threadedly connected to the threaded ring A2333, the screw B2332 is threadedly connected to the threaded ring B2334, and the threaded ring A2333 and the threaded ring B2334 are fixedly connected through the connecting piece 2335. When the threaded ring 42333 and the threaded ring B2332 rotate together, the screw A2331 drives the arc support plate 232 to move outward, thereby clamping the coiled steel bar, and then driving the coiled steel bar to rotate.

[0020] As another example, Figure 1 As shown, the equipment box 1 is also provided with a feed port 12 and a discharge port 13. The feed port 12 is fixedly arranged on one side of the equipment box 1 close to the feed mechanism 2; the discharge port 13 is fixedly arranged on the other side. The feed port 12 is used to allow unprocessed coiled steel bars to enter the equipment; the discharge port 13 is used to allow the coiled steel bars to exit the equipment after the straightening and cutting process is completed for easy collection and sorting. The power mechanism 4 includes a second motor 41, a reciprocating motor 42, a first transmission belt 43 and a second transmission belt 44. The second motor 41 and the reciprocating motor 42 are arranged at the lower part of the equipment box 1. The second motor 41 transmits power to the straightening mechanism 3 through the first transmission belt 43, and the reciprocating motor 42 transmits power to the cutting mechanism 5 through the second transmission belt 44. The straightening mechanism 3 includes a plurality of fixed frames 31, a pressure wheel group 32 and a bottom wheel group 33. The bottom wheel group 33 and the pressure wheel group 32 are both installed inside the equipment box 1 through the fixed frame 31. The pressure wheel group 32 and the bottom wheel group 33 are arranged opposite to each other. The surface of the bottom wheel group 33 is provided with a groove designed to match the pressure wheel group 32. The coiled steel bar is compressed by the pressure wheel group 32 through the groove to achieve the effect of straightening the steel bar. The bottom wheel group 33 includes a transmission bottom wheel 331, and the transmission bottom wheel 331 is connected to the output end of the second motor 41 through the first transmission belt 43. In order to achieve the traction of the coiled steel bar entering the equipment and transport it to the cutting mechanism 5. The cutting mechanism 5 includes a base 51 and a cutting knife 52 driven by the reciprocating motor 42 to reciprocate up and down. The base 51 is fixedly arranged on the lower wall of the equipment box 1, and the cutting knife 52 is connected to the output end of the reciprocating motor 42 through the second transmission belt 44.

[0021] Working principle: When in use, firstly manually hang the coiled coiled steel bar on the opening and closing device 23, and the screw A2331 drives the arc support plate 232 to move outward through the rotation of the threaded ring A2333 and the threaded ring B2334 on the tensioner 233, and the three sets of arc support plates 232 simultaneously open and close outward to clamp the coiled coiled steel bar, and then the end of the coiled steel bar is fed into the feed port 12. The first motor 224, the second motor 41 and the reciprocating motor 42 are turned on according to the preset feeding speed and cutting speed. The device starts to work. The first motor 224 drives the spring worm 226 to rotate, which in turn drives the gear 225 to rotate, and drives the rotating wheel 231 to rotate through power transmission, so that the opening and closing device 23 drives the spiral steel bar to rotate and feed, and cooperates with the second motor 41 to drive the transmission bottom wheel 331 to pull the spiral steel bar through the first transmission belt 43, thereby reducing the occurrence of knotting, jamming and breaking of the spiral steel bar during feeding; after the steel bar enters the equipment box 1, it is pulled by the transmission bottom wheel 331 to move to the rear end of the equipment box 1 to the straightening mechanism 3, and is straightened by the pressure of the pressure wheel group 32 and the bottom wheel group 33, and finally is pulled to the cutting mechanism 5, and the cutting knife 52 is driven by the reciprocating motor 42 to reciprocate up and down to cut the spiral steel bar, and finally exits the equipment from the discharge port 13 through the discharge wheel 11 to complete the straightening and cutting of the spiral steel bar.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel bar straightening and cutting device, characterized in that , comprising an equipment box (1) and a feeding mechanism (2) for elastically rotating and conveying a spiral coil that can be opened and closed; a straightening mechanism (3), a power mechanism (4), a cutting mechanism (5) and a discharge wheel (11) are arranged inside the equipment box (1); the straightening mechanism (3) and the cutting mechanism (5) are arranged transversely inside the equipment box (1), the power mechanism (4) is fixedly arranged at the bottom of the equipment box (1), the feeding mechanism (2) is fixedly arranged at the front side of the equipment box (1), and the discharge wheel (11) is fixedly arranged at the rear of the equipment box (1); the feeding mechanism (2) clamps the spiral coil steel bars by opening and closing to rotate, so that the power mechanism (4) drives the straightening mechanism (3) to push the steel bars into the equipment box (1) for straightening, and the cutting mechanism (5) cuts the straightened steel bars by the drive of the power mechanism (4).

2. The steel bar straightening and cutting equipment according to claim 1, characterized in that: The feeding mechanism (2) comprises a steel frame (21), a driving device (22), and an opening and closing device (23) capable of opening and closing the coiled steel bars, wherein the driving device (22) is fixedly connected to the steel frame (21), and the opening and closing device (23) is fixedly connected to the driving device (22) via a long rod (24).

3. The steel bar straightening and cutting equipment according to claim 2, characterized in that: The driving device (22) comprises a fixed rod (221), a fixed block (222), a motor bracket (223), a first motor (224), a gear (225), and a spring worm (226) capable of reducing the impact of steel bar jamming on the equipment; the motor bracket (223) is fixedly connected to the steel frame (21), the first motor (224) is arranged on the motor bracket (223), one end of the spring worm (226) is fixedly connected to the output end of the first motor (224); the other end is movably connected to one end of the fixed block (222), the other end of the fixed block (222) is fixedly connected to the steel frame (21), one end of the fixed rod (221) is fixedly connected to the steel frame (21); the other end side is movably connected to the middle of the gear (225), and the gear (225) is engaged with the spring worm (226).

4. The steel bar straightening and cutting equipment according to claim 3, characterized in that: The spring worm gear (226) comprises a spring (2261) and a rotating rod (2262); the rotating rod (2262) is provided with a fixing hole (2263) for fixing the spring (2261); one end of the rotating rod (2262) is fixedly connected to the output end of the first motor (224); the other end is movably connected to the fixing block (222); the spring (2261) is sleeved on the rotating rod (2262); both ends of the spring (2261) are inserted into the fixing hole (2263) and fixedly connected; the gear (225) is engaged with the spring (2261).

5. The steel bar straightening and cutting equipment according to claim 3, characterized in that: The opening and closing device (23) comprises a rotating wheel (231), an arc-shaped support plate (232) and a tensioner (233); the rotating wheel (231) is fixedly connected to one end of the long rod (24); the other end of the long rod (24) is fixedly connected to the middle part of the gear (225); one end of the tensioner (233) is fixedly connected to the rotating wheel (231); and the other end is fixedly connected to the arc-shaped support plate (232).

6. The steel bar straightening and cutting equipment according to claim 5, characterized in that: The tensioner (233) comprises a screw A (2331), a screw B (2332), a threaded ring A (2333), a threaded ring B (2334) and a connecting piece (2335); the screw A (2331) and the screw B (2332) are semi-screw structures, the missing parts of which fit each other, and the screw A (2331) and the screw B (2332) have opposite thread directions; the screw A (2331) is threadedly connected to the threaded ring A (2333), the screw B (2332) is threadedly connected to the threaded ring B (2334), and the threaded ring A (2333) and the threaded ring B (2334) are fixedly connected via the connecting piece (2335); and the lower end of the screw B (2332) is fixedly connected to the rotating wheel (231).

7. The steel bar straightening and cutting equipment according to claim 1, characterized in that: The equipment box (1) is also provided with a feed port (12) for allowing unprocessed coiled steel bars to enter the equipment, and a discharge port (13) for the coiled steel bars to exit the equipment after the straightening and cutting process is completed. The feed port (12) is fixedly arranged on one side of the equipment box (1) close to the feed mechanism (2); the discharge port (13) is fixedly arranged on the other side.

8. The steel bar straightening and cutting equipment according to claim 7, characterized in that: The power mechanism (4) comprises a second motor (41), a reciprocating motor (42), a first transmission belt (43) and a second transmission belt (44); the second motor (41) and the reciprocating motor (42) are arranged at the lower part of the equipment box (1); the second motor (41) transmits power to the straightening mechanism (3) through the first transmission belt (43); and the reciprocating motor (42) transmits power to the cutting mechanism (5) through the second transmission belt (44).

9. The steel bar straightening and cutting equipment according to claim 8, characterized in that: The straightening mechanism (3) comprises a plurality of fixing frames (31), a pressure wheel group (32) and a bottom wheel group (33); the bottom wheel group (33) and the pressure wheel group (32) are both installed inside the equipment box (1) via the fixing frames (31); the pressure wheel group (32) and the bottom wheel group (33) are arranged opposite to each other; the bottom wheel group (33) comprises a transmission bottom wheel (331); the transmission bottom wheel (331) is transmission-connected to the output end of the second motor (41) via the first transmission belt (43).

10. The steel bar straightening and cutting equipment according to claim 9, characterized in that: The cutting mechanism (5) comprises a base (51) and a cutting knife (52) driven by the reciprocating motor (42) to perform up and down reciprocating motion, the base (51) being fixedly arranged on the lower wall of the equipment box (1), and the cutting knife (52) being transmission-connected to the output end of the reciprocating motor (42) via a second transmission belt (44).

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