A reinforcing bar tying machine for cutting wire from a wire-wound inner sleeve

Abstract

A steel bar bundling machine for cutting wire from a wire winding inner sleeve, comprising a machine shell, a wire feeding mechanism, a braking mechanism, a wire winding mechanism, a coiling plate and a guide, the wire winding mechanism comprising a driving assembly and a wire winding assembly, the driving assembly driving the wire winding assembly to move forward and backward, the wire winding assembly comprising an inner sleeve, a screw rod, an inner core and a wire winding nozzle, the inner sleeve being provided with a threaded block, the two ends of the screw rod being connected with the threaded block and the driving assembly respectively, and the wire winding nozzle being arranged at the front end of the inner sleeve; a wire outlet guide is arranged between the wire feeding mechanism and the inner sleeve, the wire outlet guide being provided with a wire guide channel, the iron wire entering the wire guide channel from the lower port of the wire guide channel through the wire feeding mechanism and being sent out from the upper port to enter the coiling plate; the front end of the inner sleeve is in shearing cooperation with the edge of the upper port, and when the inner sleeve moves forward, the iron wire sent out from the upper port is cut off between the inner sleeve and the upper port. Compared with the prior art, the steel bar bundling machine optimizes the wire cutting structure, improves the endurance time of the bundling machine, and at the same time makes the distance of the iron wire tail after cutting shorter, which saves the iron wire.

Description

Technical Field

[0001] This invention relates to the field of rebar tying machines, and more particularly to a rebar tying machine that uses a wire-wrapping inner sleeve for wire cutting. Background Technology

[0002] Rebar tying machines have the advantage of high-efficiency rebar tying and are now widely used in the construction engineering field. Existing rebar tying machines include a wire feeding mechanism, a braking mechanism, a wire guiding mechanism (including a coiling plate and a guide), a wire winding mechanism, and a wire cutting mechanism. The wire feeding mechanism is used to guide the wire to the coiling plate, where the wire is guided into a coil shape to wrap around the rebar under the action of the coiling plate and the guide. The wire cutting mechanism is used to cut the wire, and the wire winding mechanism is used to tighten the wire wrapped around the rebar.

[0003] The wire cutting mechanism of the aforementioned binding machine is a separate structure. This separate mechanism not only occupies internal space but also complicates the overall structure, increasing manufacturing costs. For example, Chinese patent "CN203237416U" discloses a wire winding assembly and a binding machine. The wire winding assembly includes a winding mechanism, which in turn includes a wire cutting plate. The cutting plate is mounted on a sleeve via a fixed sleeve. A wire cutting device is connected to the cutting plate; during use, the cutting plate moves forward, pushing the wire cutting mechanism to cut the wire. The wire cutting mechanism on the sleeve of the aforementioned wire winding assembly further complicates the structure, increases the number of parts, lowers assembly efficiency, and raises production costs. For example, Chinese patent "CN106592983B" discloses an integrated wire feeding and guiding mechanism and a rebar tying machine. The rebar tying machine includes a wire feeding and guiding mechanism and a wire cutting mechanism mounted on a housing. The wire feeding and guiding mechanism guides the wire in a loop shape to wrap around the rebar. The wire cutting mechanism includes a wire cutter, one end of which is placed in a groove in the integrated wire feeding and guiding mechanism. This rebar tying machine requires a groove in the wire feeding and guiding mechanism to accommodate the wire cutter and a structure connecting the wire cutter. Its structure is complex, with many parts, low assembly efficiency, and high production costs. Furthermore, placing the wire cutter in the groove can easily cause it to jam, reducing the stability of the wire cutting mechanism. In addition, due to… Figure 1 As can be seen, the groove (i.e. the wire cutter) is located in the wire cutting mechanism and is a certain distance away from the wire winding mechanism. The above arrangement means that after the wire cutter cuts the wire and binds it, a long wire tail will be left behind. This not only wastes the wire, but also the long wire tail can easily scratch the workers and cause inconvenience to the binding work. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a steel bar binding machine with a simple wire cutting structure and a short wire tail after cutting, which is made by cutting wire with a winding inner sleeve.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows.

[0006] A rebar binding machine with a wire-winding inner sleeve and wire-cutting mechanism includes a machine housing, a wire feeding mechanism, a braking mechanism, a wire winding mechanism, a coiling plate and a guide located at the front end of the machine housing, and a wire spool compartment located inside the machine housing for holding a wire spool wound with iron wire.

[0007] The wire winding mechanism includes a drive assembly and a wire winding assembly. The drive assembly drives the wire winding assembly to move back and forth. The wire winding assembly includes an inner sleeve, a screw, an inner core, and a wire winding nozzle. The inner sleeve is provided with a threaded block. The screw cooperates with the threaded block. The drive assembly is connected to the screw. The wire winding nozzle is located at the front end of the inner sleeve.

[0008] A wire feeding mechanism and an inner sleeve are provided with a wire exit guide, and a wire exit guide is provided inside the wire exit guide. The upper port of the wire exit guide is opposite to the wire winding assembly, and the lower port of the wire exit guide is opposite to the wire feeding mechanism.

[0009] The wire enters from the lower port of the wire guide channel through the wire feeding mechanism and exits from the upper port into the coiling plate;

[0010] The inner sleeve's front end and the upper port's edge are sheared together. When the inner sleeve moves forward, the wire delivered from the upper port is cut between the inner sleeve and the upper port.

[0011] Furthermore, the front end of the inner sleeve has an angular structure, which is sheared into the edge of the upper port.

[0012] Furthermore, the wire guide includes a wire guide portion and an inner sleeve guide portion, and the wire guide channel passes through the wire guide portion and the inner sleeve guide portion.

[0013] Further, the wire guide includes a first fastener and a second fastener that are opposite to and fastened together. Both the first and second fasteners are provided with a wire guide groove and an inner sleeve guide groove. The wire guide groove and the inner sleeve guide groove are connected. After the first and second fasteners are opposite to and fastened together, the two opposite wire guide grooves form the wire guide channel, and the two opposite inner sleeve guide grooves form the inner cavity of the inner sleeve guide portion; or

[0014] The first or second fastening member is provided with a wire guide groove, which is the wire guide channel. The first and second fastening members are also provided with an inner sleeve guide groove. After the first and second fastening members are opposite to each other and fastened together, the two opposite inner sleeve guide grooves form the inner cavity of the inner sleeve guide part.

[0015] Furthermore, the inner sleeve guide is a cylindrical structure with an integral design.

[0016] Furthermore, the inner sleeve guide is a split structure consisting of two opposing semicircular pieces. The two semicircular pieces can be fastened together, or one semicircular piece can be connected to the guide wire part, and the other semicircular piece can be connected to the housing.

[0017] Furthermore, the length of the inner sleeve guide portion along the axial direction is greater than the distance the inner sleeve travels in a straight line.

[0018] Furthermore, the inner sleeve has a detachable blade block at its front end.

[0019] Furthermore, the front end of the inner sleeve is provided with an inlay groove, and the blade is inlaid in the inlay groove.

[0020] Furthermore, the blade is made of tungsten steel.

[0021] Furthermore, the cross-section of the inlay groove can be any one of elliptical, square, circular, or fan-shaped.

[0022] Furthermore, the upper port is provided with a pre-bent guide groove on the side facing the forming plate, and the inner sleeve slides on the upper port and shears against the edge of the pre-bent guide groove.

[0023] The rebar tying machine with wire cutting via a winding inner sleeve, as provided by the invention, has the following advantages compared to the prior art: First, when the inner sleeve moves forward, the wire is cut between the inner sleeve and the upper end. Compared to the prior art, there is no need to set up a separate wire cutting mechanism inside the rebar tying machine, which simplifies the internal structure of the tying machine and reduces manufacturing costs. Second, since there is no need to set up a wire cutting mechanism linked to the inner sleeve, the load on the motor of the winding mechanism is reduced, thereby reducing the power consumption during the operation of the winding mechanism. With the same energy storage battery, the wire cutting structure of the present invention can extend the operating time of the rebar tying machine. Finally, since the wire is cut between the inner sleeve and the upper end, and the distance between the cut and the winding nozzle is short, the wire end at the knot is relatively short and is basically twisted into the knot. Compared with the existing technology, the number of knots can be increased by 10%-20% using the rebar tying machine of this invention. At the same time, there is no external wire end after the rebar is tied and knotted, or the wire end is very short, which makes it less likely to scratch workers and ensures the safety of construction personnel. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of the guide section in the prior art "CN106592983B";

[0025] Figure 2 This is a front view of the rebar tying machine of the present invention;

[0026] Figure 3 for Figure 2 Front view of the winding mechanism, guide section and inner guide section;

[0027] Figure 4 for Figure 3 Top view;

[0028] Figure 5 for Figure 3 Front view sectional view;

[0029] Figure 6 Top view of the inner guide section of the wire winding assembly;

[0030] Figure 7 for Figure 6 A cross-sectional view of section AA when the central iron wire is not cut;

[0031] Figure 8 for Figure 6 A cross-sectional view of section AA when the central iron wire is cut;

[0032] Figure 9 for Figure 5 A magnified view of a portion of point A in the middle;

[0033] Figure 10 An exploded perspective view of the inner sleeve and the cutting tool block;

[0034] Figure 11 This is an exploded structural diagram of the guide wire section and the inner guide section;

[0035] Figure 12 This is an exploded view of the first and second fastening components.

[0036] 1. Housing; 11. Wire reel compartment; 12. Limit pin; 13. Elastic element;

[0037] Wire feeding mechanism 2; wire outlet guide 21; wire guide channel 211; upper port 2111; lower port 2112; wire guide part 212; first fastening plate 2121; second fastening plate 2122; first channel 212'; inner sleeve guide part 213; boss 2131; second channel 2132; pre-bent guide groove 2133; first fastening component 214; second fastening component 215; wire guide groove 216; inner sleeve guide groove 217;

[0038] Braking mechanism 3;

[0039] Wire winding mechanism 4; drive assembly 41; drive motor 411; gear reducer 412; wire winding assembly 42; inner sleeve 421; advance and retreat positioning groove 4211; rotary cam groove 4212; angular structure 4213; inlay groove 4214; screw 422; wire winding nozzle 423; inner core 424; threaded block 425;

[0040] Forming plate 5;

[0041] Guide 6;

[0042] Silk reel 7;

[0043] Cutting block 8;

[0044] Iron wire L1. Detailed Implementation

[0045] In the description of this invention, it should be understood that the terms "upper" and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0046] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] The following is in conjunction with the appendix Figure 2-12 The technical solution of the present invention will be further described below.

[0048] A rebar binding machine that uses a wire-wrapping inner sleeve for wire cutting, see [link / reference] Figure 2 The machine includes a housing 1, a wire feeding mechanism 2, a braking mechanism 3, a wire winding mechanism 4, and a coiling plate 5 and a guide 6 located at the front end of the housing 1 and opposite to each other. The housing 1 contains a wire spool 11 for holding a wire spool 7 wound with iron wire. The wire feeding mechanism 2 guides the iron wire to the coiling plate 5. The coiling plate 5 and the guide 6 bend the iron wire into a loop to wrap around the reinforcing bar. The wire winding mechanism 4 tightens the iron wire wrapped around the reinforcing bar. The braking mechanism 3 brakes the wire spool when the wire feeding mechanism 2 stops feeding wire. It should be noted that the wire spool 7 and the iron wire wound on it are environmental features; when the reinforcing bar binding machine is sold separately, the wire spool 7 is not present in the wire spool compartment 11. When binding and knotting reinforcing bars, the wire spool 7 needs to be inserted into the housing 1 to perform the binding work.

[0049] join Figure 2-5The wire winding mechanism 4 includes a drive assembly 41 and a wire winding assembly 42. The drive assembly 41 includes a drive motor 411 and a gear reducer 412 connected to the drive motor 411. The drive motor 411 and the gear reducer 412 are conventional technologies in the art and will not be described in detail here. The wire winding assembly 42 includes an inner sleeve 421, a screw 422, an inner core 424, and a wire winding nozzle 423. The inner cavity of the inner sleeve 421 is provided with a threaded block 425 fixed thereto. One end of the screw 422 is connected to the inner core 424, and the other end is connected to the reducer. The threaded block 425 is engaged with the threaded groove of the screw 422. The wire winding nozzle 423 is hinged to the front end of the inner sleeve 421 and is driven by the inner core 424 to open or close. The outer wall of the inner sleeve 421 is provided with interconnected advancing and retreating positioning grooves 4211 and rotating cam grooves 4212. The rotating cam grooves 4212 are located at the rear end of the advancing and retreating positioning grooves 4211. There are two advancing and retreating positioning grooves 4211 and two rotating cam grooves 4212, which are arranged symmetrically at the center. The two advancing and retreating positioning grooves 4211 are arranged along the axial direction of the inner sleeve 421, and the two rotating cam grooves 4212 are arranged along the circumferential direction of the inner sleeve 421. The depth of the two rotating cam grooves 4212 gradually decreases along the same circumferential direction. The housing 1 is also provided with a limiting pin 12 for restricting the movement of the inner sleeve 421 and an elastic element 13 for driving the limiting pin 12 to be engaged on the inner sleeve 421. The elastic element 13 is a compression spring, which is fixed to the housing 1 by a fixing seat. One end of the limiting pin 12 presses against the elastic element 13, and the other end is engaged in the advancing and retreating positioning groove 4211 or the rotating cam groove 4212. In use, if the inner sleeve 421 does not move forward, the limiting pin 12 is engaged in the forward and backward positioning groove 4211. When the drive motor 411 rotates, the drive motor 411 drives the screw 422 to rotate through the gear reducer 412. Since the limiting pin 12 is engaged in the forward and backward positioning groove 4211, it restricts the rotation of the inner sleeve. Therefore, the inner sleeve 421 moves forward without rotating. During the forward movement of the inner sleeve 421, the threading nozzle 423 gradually closes. When the threaded block 425 moves to the end of the threaded groove of the screw 422, the threaded block 425 abuts against the end of the threaded groove of the screw 422. At this time, the limiting pin 12 moves to the rear end of the forward and backward positioning groove 4211, that is, the rotating cam groove 4212, and the threading nozzle 423 closes to clamp the wire. The screw 422 continues to rotate, and the screw 422 will drive the threaded block 425 to rotate, that is, drive the inner sleeve 421 to rotate, thereby tightening the wire. When the wire is tightened, the drive motor 411 rotates in the reverse direction. The drive motor 411, through the gear reducer 412, drives the screw 422 to rotate in the reverse direction. During the reverse rotation of the screw 422, the limit pin 12 engages with the forward / backward positioning groove 4211. At this time, the inner sleeve 421 can only move backward to its initial position and cannot rotate. The aforementioned cooperation between the limit pin 12, the forward / backward positioning groove 4211, and the rotary cam groove 4212 to control the linear or rotary motion of the inner sleeve 421 is existing technology in the field and will not be elaborated further here.

[0050] See Figure 4-5 A wire feeding mechanism 2 and an inner sleeve 421 are provided with a wire exit guide 21. A wire guide channel 211 is provided inside the wire exit guide 21. The upper port 2111 of the wire guide channel 211 is opposite to the wire winding assembly 42, and the lower port 2112 of the wire guide channel 211 is opposite to the wire feeding mechanism 2. In use, the wire feeding mechanism 2 feeds the wire into the lower port 2112 of the wire guide channel 211, and the wire is finally delivered from its upper port 2111 into the coiling plate 5. During the forward movement of the inner sleeve 421, the wire delivered from the upper port 2111 is cut between the inner sleeve 421 and the upper port 2111. Compared to existing wire cutting structures, the above structure, which cuts the wire between the inner sleeve 421 and the upper port 2111, has the following advantages: First, as the inner sleeve 421 moves forward, the wire is cut between the inner sleeve 421 and the upper port 2111. Compared to existing technologies, there is no need to set up a separate wire cutting mechanism in the rebar tying machine, which simplifies the internal structure of the tying machine and reduces manufacturing costs. Second, since there is no need to set up a wire cutting mechanism linked to the inner sleeve 421, the load on the motor of the winding mechanism 4 is reduced, thereby reducing the power consumption of the winding mechanism 4 during operation. With the same energy storage battery, the tying machine using the above structure can extend the operating time of the rebar tying machine. Finally, since the wire L1 is cut between the inner sleeve 421 and the upper port 2111 (see [reference needed] for the wire cutting position)... Figure 6-8 The distance between the cutting position and the winding nozzle 423 is relatively short. After the wire is cut and knotted, the wire end at the knot is relatively short and is basically twisted into the knot. Compared with the existing technology, the number of knots can be increased by 10%-20% using the rebar tying machine of this invention. At the same time, there is no external wire end after the rebar is tied and knotted, or the wire end is very short, which makes it less likely to scratch workers and ensures the safety of construction personnel.

[0051] The upper port 2111 of the wire guide channel 211 is opposite to the wire winding assembly 42. Specifically, there is an angle between the wire guide channel 211 and the inner sleeve 421. The angle is between 13.5 degrees and 80 degrees, and is preferably 31 degrees in this embodiment. In this way, when the wire passes through the wire guide channel 211 and enters the coiling plate, the wire can not only smoothly enter the coiling plate and be guided into a circle, but also, under the action of gravity, the wire will stick to the side of the wire guide channel 211 away from the inner sleeve 421. The wire at the upper port will also stick to the side of the upper port 2111 away from the inner sleeve 421, that is, the edge of the upper port 2111. When the inner sleeve 421 moves forward to the edge of the upper port 2111, the inner sleeve 421 can directly cut the wire, ensuring the wire cutting effect and avoiding the wire from rebounding in the upper port 2111 and affecting the wire cutting effect.

[0052] See Figure 5 and Figure 9 The inner sleeve 421 has an angular structure 4213 at its front end, which shears into the edge of the upper port 2111. When the inner sleeve 421 moves forward, the angular structure 4213 shears into the edge of the upper port 2111, thus cutting the wire. The upper port 2111 and the inner sleeve 421 are intersected, and the inner sleeve 421 extends and retracts horizontally. By cleverly utilizing their positional relationship and setting the front end of the inner sleeve 421 as an angular structure 4213, the wire can be cut during the forward movement of the inner sleeve 421, thus achieving the function of wire cutting with a simple structure. As a preferred embodiment, the angular structure 4213 of the inner sleeve 421 fits against the upper port 2111. In this way, the inner sleeve 421 is supported by the wire guide 21, ensuring stable forward and backward movement, while also improving the shearing effect of the angular structure 4213.

[0053] The above angular structure is shown in the attached image. Figure 10 The inner sleeve 421 has an inlay groove 4214 at its front end. The cross-section of the inlay groove 4214 can be any one of elliptical, square, circular, or fan-shaped. A blade block 8 is detachably inlaid in the inlay groove 4214. The shape of the blade block 8 can be set according to the cross-sectional shape of the inlay groove 4214 and actual needs. In use, the blade block 8 is inlaid into the inlay groove 4214, and the blade edge of the blade block 8 is placed against the plane of the upper port 2111. When the inner sleeve moves forward, the blade block 8 forms a shearing force with the edge of the upper port 2111, thereby cutting the wire. The wire cutting function is achieved by setting the inlay groove 4214 and the blade block. Its structure is simple and easy to manufacture. In addition, the blade block 8 is detachably inlaid in the inlay groove 4214. When the blade edge becomes blunt, only the blade block can be replaced, without replacing the entire inner sleeve 421, reducing the maintenance cost of the wire cutting structure. In addition, since tungsten steel has the characteristics of high hardness, wear resistance, strength and toughness, as a preferred option, the material of the blade block 8 is made of tungsten steel, which can improve the performance and service life of the blade block 8.

[0054] See Figure 3-5 , Figure 9 and Figure 11 The wire guide 21 includes a wire guide portion 212 and an inner guide portion 213, with a wire guide channel 211 passing through the wire guide portion 212 and the inner guide portion 213. For details, see [link to documentation]. Figure 11The guide wire portion 212 includes a first fastening plate 2121 and a second fastening plate 2122 that are opposite to and fastened together. The first fastening plate 2121 has a first channel 212', which is part of the guide wire channel 211. The inner sleeve guide portion 213 is a cylindrical structure with an integral structure. The outer peripheral wall of the inner sleeve 421 is attached to the inner wall of the inner sleeve guide portion 213. The bottom of the front end of the inner sleeve guide portion 213 has a boss 2131. The boss 2131 has a second channel 2132 that communicates with the first channel 212' and faces the coiling plate 5. The first channel 212' and the second channel 2132 form the guide wire channel 211. In the above structure, the guide wire portion 212 and the inner sleeve guide portion 213 are separate structures, which facilitates their production, processing, and assembly, and can reduce production and manufacturing costs. Furthermore, the boss 2131 is located at the bottom front end of the inner sleeve guide 213, and no other structure is provided above it. Therefore, the wire is not interfered with by the inner sleeve guide 213 during the process of being guided to the coiling plate 5, which avoids affecting the coiling effect of the wire. In the above structure, it should be noted that the inner sleeve guide 213 can also be a split structure of two opposing semicircular pieces. The two semicircular pieces can be fastened together, or one semicircular piece can be connected to the wire guide 212, and the other semicircular piece can be connected to the housing 1.

[0055] As for other alternative implementation methods, see Figure 12 The wire guide 21 consists of a first fastening member 214 and a second fastening member 215 that are opposite to each other and fastened together. Both the first fastening member 214 and the second fastening member 215 are provided with a wire guide groove 216 and an inner sleeve guide groove 217. The wire guide groove 216 and the inner sleeve guide groove 217 are connected. After the first fastening member 214 and the second fastening member 215 are opposite to each other and fastened together, the two opposite wire guide grooves 216 form the wire guide channel 211, and the two opposite inner sleeve guide grooves 217 form the inner cavity of the inner sleeve guide portion 213. Because the wire guide channel 211 is relatively long and has a small diameter, dividing the wire guide 21 into the first fastening member 214 and the second fastening member 215 allows for direct machining of the wire guide grooves on their sides. This reduces the machining requirements of the wire guide grooves and helps to reduce the manufacturing cost of the wire guide 21. It should be noted that in the above two structures of the wire guide 21 in this embodiment, the first structure only has a first channel 212' on the first fastening plate 2121, and the second fastening plate 2122 does not need to have a first channel 212'. This not only simplifies the structure, but also reduces the machining accuracy of the first channel 212', avoiding the problem of complex structure and high machining accuracy of the wire guide 21 due to the need to open groove structures with opposite positions on both fastening plates. Therefore, the first structure of the wire guide 21 is preferred in this embodiment.

[0056] See Figure 9The upper port 2111 has a pre-bending guide groove 2133 on the side facing the coiling plate 5. The pre-bending guide groove 2133 is inclined towards the wire inlet of the coiling plate 5. When the inner sleeve 421 slides on the upper port 2111, it shears against the edge of the pre-bending guide groove 2133. During the process of the inner sleeve 421 moving forward to cut the wire, the wire (the end of the wire for the next binding) located in the pre-bending guide groove 2133 will be bent. In this way, when performing the next operation, the wire can enter the wire inlet of the coiling plate 5 more easily, and the wire can be bent into a circle in the coiling plate 5 more easily to wrap the steel bar.

[0057] As an improvement, the axial length of the inner sleeve guide portion 213 (the inner cavity of the inner sleeve guide portion 213) is greater than the distance the inner sleeve 421 travels in a straight line. By providing a longer inner sleeve guide portion 213, the inner sleeve 421 can remain within the inner cavity of the inner sleeve guide portion 213 during forward or backward movement and can be supported by the inner wall of the inner sleeve guide portion 213, preventing swaying during the forward and backward movement of the inner sleeve 421 and thus ensuring the stability of the forward and backward movement of the inner sleeve 421.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that variations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A steel bar binding machine with a wire-winding inner sleeve for cutting wire, comprising a machine housing, a wire feeding mechanism, a braking mechanism, a wire winding mechanism disposed within the machine housing, a coiling plate and a guide disposed at the front end of the machine housing, wherein a wire spool compartment is provided within the machine housing for accommodating a wire spool wound with iron wire. The wire winding mechanism includes a drive assembly and a wire winding assembly. The drive assembly drives the wire winding assembly to move back and forth. The wire winding assembly includes an inner sleeve, a screw, an inner core, and a wire winding nozzle. The inner sleeve is provided with a threaded block. The screw cooperates with the threaded block. The drive assembly is connected to the screw. The wire winding nozzle is located at the front end of the inner sleeve. A wire feeding mechanism and an inner sleeve are provided with a wire exit guide, and a wire exit guide is provided inside the wire exit guide. The upper port of the wire exit guide is opposite to the wire winding assembly, and the lower port of the wire exit guide is opposite to the wire feeding mechanism. The wire enters from the lower port of the wire guide channel through the wire feeding mechanism and exits from the upper port into the coiling plate; Its features are, The inner sleeve has a shearing fit with the edge of the upper port. When the inner sleeve moves forward, the wire sent out from the upper port is cut between the inner sleeve and the upper port. The upper port is provided with a pre-bent guide groove on the side facing the forming plate, and the inner sleeve slides on the upper port and shears with the edge of the pre-bent guide groove.

2. The rebar binding machine with wire cutting by a wire-wrapping inner sleeve according to claim 1, characterized in that: The front end of the inner sleeve has an angular structure, which is sheared into the edge of the upper port.

3. The rebar binding machine with wire cutting by a wire-wrapping inner sleeve according to claim 1, characterized in that: The wire guide includes a wire guide portion and an inner sleeve guide portion, and the wire guide channel passes through the wire guide portion and the inner sleeve guide portion.

4. The rebar binding machine with wire cutting by a wire-winding inner sleeve according to claim 3, characterized in that: The wire guide includes a first fastening member and a second fastening member that are opposite to and fastened together. Both the first and second fastening members are provided with a wire guide groove and an inner sleeve guide groove, which are connected. After the first and second fastening members are opposite to and fastened together, the two opposite wire guide grooves form the wire guide channel, and the two opposite inner sleeve guide grooves form the inner cavity of the inner sleeve guide portion; or The first or second fastening member is provided with a wire guide groove, which is the wire guide channel. The first and second fastening members are also provided with an inner sleeve guide groove. After the first and second fastening members are opposite to each other and fastened together, the two opposite inner sleeve guide grooves form the inner cavity of the inner sleeve guide part.

5. The rebar binding machine with wire cutting by a wire-wrapping inner sleeve according to claim 3, characterized in that: The inner sleeve guide is a cylindrical structure with an integral design.

6. The rebar binding machine with wire cutting by a wire-wrapping inner sleeve according to claim 3, characterized in that: The inner sleeve guide is a split structure consisting of two opposing semicircular pieces. The two semicircular pieces can be fastened together, or one semicircular piece can be connected to the guide wire part and the other semicircular piece can be connected to the housing.

7. The rebar binding machine with wire cutting by a wire-winding inner sleeve according to claim 3, characterized in that: The length of the inner sleeve guide portion along the axial direction is greater than the distance the inner sleeve travels in a straight line.

8. The rebar binding machine with wire cutting by a wire-wrapping inner sleeve according to claim 1, characterized in that: The inner sleeve has a detachable blade block at its front end.

9. The rebar binding machine with wire cutting by a wire-wrapping inner sleeve according to claim 8, characterized in that: The inner sleeve has an inlay groove at its front end, and the blade is inlaid in the inlay groove.

10. The rebar binding machine with wire cutting by a wire-wrapping inner sleeve according to claim 8, characterized in that: The blade is made of tungsten steel.

11. The rebar binding machine with wire cutting by a wire-wrapping inner sleeve according to claim 9, characterized in that: The cross-section of the inlay groove can be any one of elliptical, square, circular, or fan-shaped.

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