WO2024124628A1 - Reinforcing bar binding machine cutting wire by means of inner wire winding sleeve - Google Patents

Abstract

A reinforcing bar binding machine cutting a wire by means of an inner wire winding sleeve. The reinforcing bar binding machine comprises a casing (1), a wire feeding mechanism (2), a braking mechanism (3), a wire winding mechanism (4), a coiler plate (5), and a guide (6), wherein the wire winding mechanism (4) comprises a driving assembly (41) and a wire winding assembly (42), the driving assembly (41) driving the wire winding assembly (42) to move back and forth, and the wire winding assembly (42) comprising an inner sleeve (421), a screw rod (422), an inner core (424) and a wire winding nozzle (423), a threaded block (425) being arranged on the inner sleeve (421), two ends of the screw rod (422) being connected to the threaded block (425) and the driving assembly (41), respectively, and the wire winding nozzle (423) being arranged at a front end of the inner sleeve (421); a wire outlet guide member (21) is arranged between the wire feeding mechanism (2) and the inner sleeve (421), a wire guide channel (211) is provided in the wire outlet guide member (21), and an iron wire enters from a lower port of the wire guide channel (211) through the wire feeding mechanism (2), and is conveyed from an upper port into the coiler plate (5); and a front end of the inner sleeve (421) is in shear fit with an edge of the upper port, and when the inner sleeve (421) moves forwards, the iron wire, which is conveyed from the upper port, is cut off between the inner sleeve (421) and the upper port. The reinforcing bar binding machine optimizes a wire cutting structure and prolongs the duration of use of the binding machine; moreover, the length of the tail of the iron wire is short after the iron wire is cut off, thereby saving on iron wire.

Description

A steel bar bundling machine with wire winding inner sleeve cutting Technical Field

The invention relates to the field of steel bar bundling machines, in particular to a steel bar bundling machine with wire winding inner sleeve cutting.

Background technique

The steel bar bundling machine has the advantage of high efficiency in bundling steel bars and has been widely used in the field of construction engineering. The existing steel bar bundling machine includes 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 iron wire to the coiling plate, and the iron wire is guided into a coil under the action of the coiling plate and the guide to wind the steel bar. The wire cutting mechanism is used to cut the iron wire, and the wire winding mechanism is used to tighten the iron wire wound on the steel bar.

The wire cutting mechanism of the above-mentioned strapping machine is a separately arranged structure. The separately arranged wire cutting mechanism will not only occupy the internal space of the steel bar strapping machine, but also make the overall structure of the steel bar strapping machine complicated, increasing the production and manufacturing cost of the strapping machine. For example, the Chinese patent "CN203237416U" discloses a wire winding assembly and a steel bar strapping machine, wherein the wire winding assembly includes a wire winding mechanism, and the wire winding mechanism includes a wire cutting plate, and the wire cutting plate is installed on the sleeve through a fixed sleeve; a wire cutting device is connected to the wire cutting plate, and when in use, the wire cutting plate moves forward to push the wire cutting mechanism to cut the wire. The wire cutting mechanism is arranged on the sleeve of the above-mentioned wire winding assembly, which makes the structure of the wire winding assembly more complicated, with more parts, low assembly efficiency and high production cost. Another example is the Chinese patent "CN106592983B" which discloses an integrated wire outlet and wire guide mechanism and a steel bar bundling machine, wherein the steel bar bundling machine includes a wire outlet and wire guide mechanism installed on a housing and a wire cutting mechanism, wherein the wire outlet and wire guide mechanism is used to guide the wire in the form of a loop so as to wrap the steel bar, and the wire cutting mechanism includes a wire cutter, one end of which is placed in a groove of the integrated wire outlet and wire guide mechanism. The above-mentioned steel bar bundling machine needs to be provided with a groove for accommodating the wire cutter and a structure for connecting the wire cutter in the wire outlet and wire guide mechanism, which has a complex structure, many parts, low assembly efficiency, and high production cost. In addition, the wire cutter is easily stuck in the groove when it is arranged in the groove, thereby reducing the stability of the wire cutting mechanism. In addition, as can be seen from Figure 1, the groove (i.e., the wire cutter) is located in the wire cutting mechanism, and is one end distance away from the wire winding mechanism. The above arrangement makes it possible for the wire cutter to leave a long wire tail after cutting the wire and bundling it, which not only wastes the wire, but also the long wire tail can easily scratch the workers, causing inconvenience to the bundling work.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a steel bar bundling machine which has a simple wire cutting structure and a short wire tail after wire cutting and cuts the wire by a wire winding inner sleeve.

To achieve the above object, the technical solution of the present invention is as follows.

A steel bar bundling machine with wire winding and wire cutting, comprising a casing, a wire feeding mechanism arranged in the casing, a brake mechanism, a wire winding mechanism, a coiling plate and a guide arranged at the front end of the casing, wherein a wire reel bin is arranged in the casing, and the wire reel bin is used to accommodate a wire reel wound with iron wire;

The wire winding mechanism comprises a driving assembly and a wire winding assembly, wherein the driving assembly drives the wire winding assembly to move forward and backward, and the wire winding assembly comprises an inner sleeve, a screw rod, an inner core and a wire winding nozzle, wherein a thread block is arranged on the inner sleeve, the screw rod cooperates with the thread block, the driving assembly is connected with the screw rod, and the wire winding nozzle is arranged at the front end of the inner sleeve;

A wire outlet guide is provided between the wire feeding mechanism and the inner sleeve, a wire guide channel is provided in the wire outlet guide, an upper end of the wire guide channel is opposite to the wire winding assembly, and a lower end of the wire guide channel is opposite to the wire feeding mechanism;

The iron wire enters from the lower port of the wire guide channel through the wire feeding mechanism, and is sent out from the upper port to enter the coil forming plate;

The front end of the inner sleeve is shear-matched with the edge of the upper port. 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.

Furthermore, the front end of the inner sleeve is an angular structure, and the angular structure is shear-matched with the edge of the upper port.

Furthermore, the wire outlet guide comprises a wire guiding portion and an inner sleeve guiding portion, and a wire guiding channel passes through the wire guiding portion and the inner sleeve guiding portion.

Further, the wire outlet guide comprises a first fastening member and a second fastening member which are opposite to each other and buckled together, the first fastening member and the second fastening member are both provided with a wire guide groove and an inner sleeve guide groove, the wire guide groove and the inner sleeve guide groove are connected, and after the first fastening member and the second fastening member are opposite to each other and buckled together, the two opposite wire guide grooves constitute the wire guide channel, and the two opposite inner sleeve guide grooves constitute the inner cavity of the inner sleeve guide portion; or

A wire guide groove is provided on the first fastener or the second fastener, and the wire guide groove is the wire guide channel. The first fastener and the second fastener are also provided with an inner sleeve guide groove. After the first fastener and the second fastener are relative and fastened together, the two relative inner sleeve guide grooves constitute the inner cavity of the inner sleeve guide part.

Furthermore, the inner sleeve guide portion is in a cylindrical shape with an integrated structure.

Furthermore, the inner sleeve guide portion is a split structure with two semicircular pieces facing each other, and the two semicircular pieces can be buckled together, or one semicircular piece is connected to the guide wire portion, and the other semicircular piece is connected to the casing.

Furthermore, the length of the inner sleeve guide portion along the axial direction is greater than the distance of the inner sleeve's linear motion.

Furthermore, a detachable knife block is provided at the front end of the inner sleeve.

Furthermore, a embedding groove is provided at the front end of the inner sleeve, and the knife block is embedded in the embedding groove.

Furthermore, the blade block is made of tungsten steel.

Furthermore, the cross-section of the inlay groove is any one of an elliptical, square, circular, and sector-shaped.

Furthermore, a pre-bending guide groove is provided on the side of the upper port facing the loop forming plate, and the inner sleeve is shear-matched with the edge of the pre-bending guide groove when sliding on the upper port.

The steel bar bundling machine provided by the invention, which is wire-cut by the inner sleeve of the wire winding, has the following advantages compared with the prior art: first, when the inner sleeve moves forward, the iron wire is cut between the inner sleeve and the upper end port. Compared with the prior art, there is no need to set a separate wire cutting mechanism in the steel bar bundling machine, which simplifies the internal structure of the bundling machine and reduces the production cost. Secondly, since there is no need to set a wire cutting mechanism linked to the inner sleeve, the load of the motor on the wire winding mechanism is reduced, thereby reducing the power loss of the working process on the wire winding mechanism. Under the same energy storage battery, the wire cutting structure of the present invention can extend the battery life of the steel bar bundling machine. Finally, since the iron wire is cut between the inner sleeve and the upper end port, the distance between the cutting position and the wire winding nozzle is short. When the iron wire is cut and knotted, the iron wire head at the knot is relatively short and is basically screwed into the knot. Compared with the prior art, the number of knots of the steel bar bundling machine in the present invention can be increased by 10%-20% for the same wire reel. At the same time, there is no external placement of the iron wire head after the steel bar is tied and knotted, or the iron wire head is very short, and it is not easy to scratch the workers, which ensures the safety of the construction personnel.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a cross-sectional view of a guide portion in the prior art “CN106592983B”;

FIG2 is a front view of the steel bar bundling machine of the present invention;

FIG3 is a front view of the wire winding mechanism, the wire guiding portion and the inner sleeve guide portion in FIG2 ;

FIG4 is a top view of FIG3 ;

FIG5 is a front view cross-sectional view of FIG3;

Fig. 6 is a top view of the inner sleeve guide portion of the wire winding assembly;

Fig. 7 is a cross-sectional view of the A-A section of Fig. 6 when the iron wire is not cut;

Fig. 8 is a cross-sectional view of the A-A section when the iron wire in Fig. 6 is cut;

FIG9 is a partial enlarged schematic diagram of point A in FIG5 ;

FIG10 is an exploded structural perspective view of the inner sleeve and the knife block;

FIG11 is a schematic diagram of the exploded structure of the guide wire portion and the inner sleeve guide portion;

FIG12 is a schematic diagram of the exploded structure of the first fastening member and the second fastening member;

Casing 1; wire reel bin 11; limit pin 12; elastic member 13;

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

Braking mechanism 3;

Wire winding mechanism 4; driving assembly 41; driving motor 411; gear reducer 412; wire winding assembly 42; inner sleeve 421; advancing and retreating positioning groove 4211; rotating cam groove 4212; angular structure 4213; inlay groove 4214; screw rod 422; wire winding nozzle 423; inner core 424; thread block 425;

Looping plate 5;

Guide 6;

Wire reel 7;

Knife block 8;

Iron wire L1.

Detailed ways

In the description of the present invention, it is necessary to understand that the terms "upper", "rear", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

The technical solution of the present invention is further described below in conjunction with Figures 2-12.

A steel bar bundling machine with wire winding and wire cutting, see FIG2, comprises a housing 1, a wire feeding mechanism 2 arranged in the housing 1, a brake mechanism 3, a wire winding mechanism 4, and a coiling plate 5 and a guide 6 arranged at the front end of the housing 1 and arranged opposite to each other. Among them, a wire reel bin 11 is provided in the housing 1, and the wire reel bin 11 is used to accommodate a wire reel 7 wound with iron wire, the wire feeding mechanism 2 is used to guide the iron wire to the coiling plate 5, and the coiling plate 5 and the guide 6 are used to bend the iron wire into a coil shape so as to wrap the steel bar, the wire winding mechanism 4 is used to tighten the iron wire wound on the steel bar, and the brake mechanism 3 is used to brake the wire reel when the wire feeding mechanism 2 stops feeding the wire. It should be noted that the above wire reel 7 and the iron wire wound thereon are environmental characteristics, that is, when the steel bar bundling machine is sold separately, there is no wire reel 7 in the wire reel bin 11. When the steel bars are tied and knotted, the wire reel 7 needs to be loaded into the housing 1 to carry out the steel bar bundling work.

Referring to Figures 2-5, the 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 above drive motor 411 and gear reducer 412 are conventional technical means in this field and are not described here. The wire winding assembly 42 includes an inner sleeve 421, a screw rod 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 relatively thereto. One end of the screw rod 422 is connected to the inner core 424, and the other end is connected to the reducer. The threaded block 425 cooperates with the thread groove of the screw rod 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 a mutually connected advance and retreat positioning groove 4211 and a rotating cam groove 4212. The rotating cam groove 4212 is located at the rear end of the advance and retreat positioning groove 4211. There are two advance and retreat positioning grooves 4211 and rotating cam groove 4212, and they are arranged symmetrically. The two advance and retreat 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, and the depth of the two rotating cam grooves 4212 along the same circumferential direction gradually becomes shallower. The housing 1 is also provided with a limit pin 12 for limiting the movement of the inner sleeve 421 and an elastic member 13 driving the limit pin 12 to be clamped on the inner sleeve 421. The elastic member 13 is a compression spring, which is fixed to the housing 1 through a fixing seat. One end of the limit pin 12 presses the elastic member 13, and the other end is clamped in the advance and retreat positioning groove 4211 or the rotating cam groove 4212. During use, if the inner sleeve 421 does not move forward, the limit pin 12 is stuck in the advance and retreat positioning groove 4211; when the driving motor 411 rotates, the driving motor 411 drives the screw 422 to rotate through the gear reducer 412. Since the limit pin 12 is stuck in the advance and retreat positioning groove 4211 at this time, the rotation of the inner sleeve is limited, so the inner sleeve 421 moves forward without rotating, and the wire winding nozzle 423 gradually closes during the forward movement of the inner sleeve 421; when the thread block 425 moves to the end of the thread groove of the screw 422, the thread block 425 abuts against the end of the thread groove of the screw 422, at this time, the limit pin 12 is stuck and moved to the rear end of the advance and retreat positioning groove 4211, that is, the rotating cam groove 4212, and the wire winding nozzle 423 closes and clamps the wire; the screw 422 continues to rotate, and the screw 422 will drive the thread block 425 to rotate, that is, drive the inner sleeve 421 to rotate, thereby tightening the wire. After tightening the wire, the driving motor 411 rotates in the reverse direction, and the driving motor 411 drives the screw 422 to rotate in the reverse direction through the gear reducer 412. During the reverse rotation of the screw 422, the limit pin 12 will be stuck in the advance and retreat positioning groove 4211. At this time, the inner sleeve 421 can only move backward to the initial position and cannot rotate. The above-mentioned limit pin 12 cooperates with the advance and retreat positioning groove 4211 and the rotating cam groove 4212 to control the linear motion or rotational motion of the inner sleeve 421, which is a prior art in the field and will not be repeated here.

Referring to Fig. 4-5, a wire outlet guide 21 is provided between the wire feeding mechanism 2 and the inner sleeve 421, and a wire guide channel 211 is provided inside and on the wire outlet guide 21, and an upper end 2111 of the wire guide channel 211 is opposite to the wire winding assembly 42, and a lower end 2112 of the wire guide channel 211 is opposite to the wire feeding mechanism 2. When in use, the wire feeding mechanism 2 feeds the iron wire into the lower end 2112 of the wire guide channel 211, and the iron wire is finally sent out from the upper end 2111 through the wire guide channel 211 and enters the loop forming plate 5. In the process of the inner sleeve 421 moving forward, the iron wire sent out from the upper end 2111 is cut between the inner sleeve 421 and the upper end 2111, and the iron wire sent out from the upper end is cut between the inner sleeve 421 and the upper end 2111. Compared with the existing wire cutting structure, the above structure cuts the wire between the inner sleeve 421 and the upper end 2111, which has the following advantages. First, when the inner sleeve 421 moves forward, the wire is cut between the inner sleeve 421 and the upper end 2111. Compared with the prior art, there is no need to set a separate wire cutting mechanism in the steel bar bundling machine, which simplifies the internal structure of the bundling machine and reduces the production cost. Secondly, since there is no need to set a wire cutting mechanism linked to the inner sleeve 421, the load of the motor on the winding mechanism 4 is reduced, thereby reducing the power loss of the working process of the winding mechanism 4. Under the same energy storage battery, the bundling machine using the above structure can extend the battery life of the steel bar bundling machine. Finally, since the iron wire L1 is cut between the inner sleeve 421 and the upper port 2111 (see Figures 6-8 for the position where the iron wire is cut), the distance between the cutting position and the wire winding nozzle 423 is relatively short. When the iron wire is cut and knotted, the iron wire head at the knot is relatively short and is basically screwed into the knot. Compared with the prior art, the number of knots of the same wire reel using the steel bar bundling machine in the present invention can be increased by 10%-20%. At the same time, after the steel bars are tied and knotted, there is no external wire head, or the wire head is very short, and it is not easy to scratch the workers, thereby ensuring the safety of the construction personnel.

The upper port 2111 of the above-mentioned 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, and the angle of the angle is between 13.5 degrees and 80 degrees, and the present embodiment is preferably 31 degrees; in this way, when the iron wire passes through the wire guide channel 211 and enters the loop-forming plate, the iron wire can not only smoothly enter the loop-forming plate and guide the iron wire into a circle, but also under the action of gravity, the iron wire will stick to the side of the wire guide channel 211 away from the inner sleeve 421, and the iron wire located 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 above-mentioned 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 iron wire, thereby ensuring the wire cutting effect and avoiding the iron wire rebounding in the upper port 2111 and affecting the wire cutting effect.

Referring to Figures 5 and 9, the front end of the inner sleeve 421 is an angular structure 4213, and the angular structure 4213 is sheared with the edge of the upper port 2111. When the inner sleeve 421 moves forward, the angular structure 4213 of the inner sleeve 421 forms a shearing fit with the edge of the upper port 2111 to cut the wire. The upper port 2111 and the inner sleeve 421 are arranged crosswise, and the inner sleeve 421 is telescopic in the horizontal direction. By cleverly utilizing the positional relationship between the two, the front end of the inner sleeve 421 is set as the angular structure 4213, so that the wire can be cut during the process of the inner sleeve 421 moving forward, thereby realizing the function of wire cutting through a simple structure. As a preferred embodiment, the angular structure 4213 of the inner sleeve 421 fits the upper port 2111, so that the inner sleeve 421 can be supported by the wire guide 21 to ensure that it can move forward and backward stably, and at the same time, the shearing effect of the angular structure 4213 can be improved.

The above angular structure is as follows, referring to FIG. 10 , the front end of the inner sleeve 421 is provided with an inlay groove 4214, the cross section of the inlay groove 4214 is any one of an ellipse, a square, a circle, and a fan, and a knife block 8 is detachably inlaid in the inlay groove 4214, and the shape of the knife block 8 can be set according to the cross-sectional shape of the inlay groove 4214 and actual needs. When in use, the knife block 8 is inlaid into the inlay groove 4214, and the blade of the knife block 8 is attached to the plane where the upper port 2111 is located. When the inner sleeve moves forward, the knife block 8 forms a shear force with the edge of the upper port 2111 to cut the iron wire. The above wire cutting function is realized by setting the inlay groove 4214 and the knife block, and the structure is simple and easy to manufacture. In addition, the knife block 8 is detachably inlaid in the inlay groove 4214. When the blade angle of the knife block becomes blunt, only the knife block can be replaced without replacing the entire inner sleeve 421, thereby 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 solution, the material of the blade block 8 is selected from tungsten steel, which can improve the use effect and service life of the blade block 8.

Referring to Figs. 3-5, 9 and 11, the wire guide 21 includes a wire guide portion 212 and an inner sleeve guide portion 213, and a wire guide channel 211 passes through the wire guide portion 212 and the inner sleeve guide portion 213. Specifically, referring to Fig. 11, the wire guide portion 212 includes a first buckle plate 2121 and a second buckle plate 2122 which are opposite and buckled together, and a first channel 212' is provided on the first buckle plate 2121, and the first channel 212' is a part of the wire guide channel 211. The inner sleeve guide portion 213 is a cylindrical structure of an integral structure, and the outer peripheral wall of the inner sleeve 421 is attached to the inner wall of the inner sleeve guide portion 213; a boss 2131 is provided at the bottom of the front end of the inner sleeve guide portion 213, and a second channel 2132 which is connected to the first channel 212' and faces the loop forming plate 5 is provided on the boss 2131, and the first channel 212' and the second channel 2132 form the wire guide channel 211. In the above structure, the wire guide portion 212 and the inner sleeve guide portion 213 are split structures, which is convenient for production, processing, and assembly, and can reduce production and manufacturing costs. In addition, the boss 2131 is arranged at the front end bottom of the inner sleeve guide portion 213, and no other structure is arranged above it, so that the wire guide will not be interfered by the inner sleeve guide portion 213 during the process of being guided to the looping plate 5, which avoids affecting the looping effect of the iron wire. In the above structure, it should be noted that the inner sleeve guide portion 213 can also be a split structure relative to two semicircular pieces, and the two semicircular pieces can be buckled together, or one semicircular piece is connected to the wire guide portion 212, and the other semicircular piece is connected to the casing 1.

As another optional embodiment, referring to FIG. 12 , the wire guide 21 is a first fastening member 214 and a second fastening member 215 which are opposite and buckled together. The first fastening member 214 and the second fastening member 215 are both 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 and buckled 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. Since the wire guide channel 211 is long and has a small diameter, the wire guide 21 is divided into the first fastening member 214 and the second fastening member 215 so that the wire guide groove can be directly processed on the side thereof, which reduces the processing requirements of the wire guide groove and is conducive to reducing the production and manufacturing cost of the wire guide 21. It should be noted that, in the above two structures of the wire guide 21 of this embodiment, in the first structure, only the first channel 212' is provided on the first buckle plate 2121, and the first channel 212' is not required to be provided on the second buckle plate 2122, which not only simplifies the structure, but also reduces the processing accuracy of the first channel 212', avoiding the problem of complex structure and high processing accuracy of the wire guide 21 due to the need to provide a groove structure with relative positions on both buckle plates. Therefore, the first structure of the wire guide 21 is preferred in this embodiment.

Referring to Fig. 9, a pre-bending guide groove 2133 is provided on the side of the upper port 2111 facing the coiling plate 5. The pre-bending guide groove 2133 is inclined toward the wire inlet of the coiling plate 5, and the inner sleeve 421 shears and cooperates with the edge of the pre-bending guide groove 2133 when sliding on the upper port 2111. In the process of the inner sleeve 421 moving forward to cut the iron wire, the iron wire in the pre-bending guide groove 2133 (the iron wire head for the next bundling) will be bent, so that the iron wire can more conveniently enter the wire inlet of the coiling plate 5 when the next work is performed, and the iron wire is also easier to bend into a circle in the coiling plate 5 to wrap the steel bar.

As an improvement, the length of the inner sleeve guide portion 213 (the inner cavity of the inner sleeve guide portion 213) in the axial direction is greater than the distance of the linear movement of the inner sleeve 421. By providing a longer inner sleeve guide portion 213, the inner sleeve 421 can be located in the inner cavity of the inner sleeve guide portion 213 during the process of moving forward or backward, and can be supported by the inner wall of the inner sleeve guide portion 213, so as to avoid shaking of the inner sleeve 421 during the process of moving forward and backward, thereby ensuring the stability of the inner sleeve 421 moving forward and backward.

While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes 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 (12)

1. A steel bar bundling machine with wire winding and wire cutting, comprising a casing, a wire feeding mechanism arranged in the casing, a brake mechanism, a wire winding mechanism, a coiling plate and a guide arranged at the front end of the casing, wherein a wire reel bin is arranged in the casing, and the wire reel bin is used to accommodate a wire reel wound with iron wire;

   The wire winding mechanism comprises a driving assembly and a wire winding assembly, wherein the driving assembly drives the wire winding assembly to move forward and backward, and the wire winding assembly comprises an inner sleeve, a screw rod, an inner core and a wire winding nozzle, wherein a thread block is arranged on the inner sleeve, the screw rod cooperates with the thread block, the driving assembly is connected with the screw rod, and the wire winding nozzle is arranged at the front end of the inner sleeve;

   A wire outlet guide is provided between the wire feeding mechanism and the inner sleeve, a wire guide channel is provided in the wire outlet guide, an upper end of the wire guide channel is opposite to the wire winding assembly, and a lower end of the wire guide channel is opposite to the wire feeding mechanism;

   The iron wire enters from the lower port of the wire guide channel through the wire feeding mechanism, and is sent out from the upper port to enter the coil forming plate;

   The utility model is characterized in that the front end of the inner sleeve is shear-matched 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.
2. The steel bar bundling machine with wire-wrapped inner sleeve for cutting wires according to claim 1 is characterized in that the front end of the inner sleeve is an angular structure, and the angular structure is shear-matched with the edge of the upper port.
3. The steel bar bundling machine with wire winding and inner sleeve cutting according to claim 1 is characterized in that the wire outlet guide comprises a wire guiding portion and an inner sleeve guiding portion, and the wire guiding channel passes through the wire guiding portion and the inner sleeve guiding portion.
4. The steel bar bundling machine with wire winding and inner sleeve cutting according to claim 3 is characterized in that: the wire outlet guide comprises a first fastening member and a second fastening member which are opposite and buckled together, the first fastening member and the second fastening member are both provided with a wire guide groove and an inner sleeve guide groove, the wire guide groove and the inner sleeve guide groove are connected, and after the first fastening member and the second fastening member are opposite and buckled together, the two opposite wire guide grooves constitute the wire guide channel, and the two opposite inner sleeve guide grooves constitute the inner cavity of the inner sleeve guide portion; or

   A wire guide groove is provided on the first fastener or the second fastener, and the wire guide groove is the wire guide channel. The first fastener and the second fastener are also provided with an inner sleeve guide groove. After the first fastener and the second fastener are relative and fastened together, the two relative inner sleeve guide grooves constitute the inner cavity of the inner sleeve guide part.
5. The steel bar bundling machine for cutting wires by winding an inner sleeve according to claim 3 is characterized in that the inner sleeve guide portion is a cylindrical one-piece structure.
6. According to claim 3, the steel bar bundling machine with wire winding inner sleeve cutting is characterized in that: the inner sleeve guide part is a split structure with two semicircular pieces facing each other, the two semicircular pieces can be buckled together, or one semicircular piece is connected to the wire guide part, and the other semicircular piece is connected to the casing.
7. The steel bar bundling machine for cutting wires by a wire-wound inner sleeve according to claim 3 is characterized in that the length of the inner sleeve guide portion in the axial direction is greater than the distance of the inner sleeve's linear motion.
8. The steel bar bundling machine for cutting wires by a wire-wound inner sleeve according to claim 1 is characterized in that a detachable knife block is provided at the front end of the inner sleeve.
9. The steel bar bundling machine for cutting wires by a wire-wound inner sleeve according to claim 8 is characterized in that an embedding groove is provided at the front end of the inner sleeve, and the knife block is embedded in the embedding groove.
10. The steel bar bundling machine for cutting wires by winding wire inner sleeve according to claim 8 is characterized in that the knife block is a knife block made of tungsten steel.
11. The steel bar bundling machine with wire winding and wire cutting according to claim 9 is characterized in that the cross-section of the embedding groove is any one of an elliptical, square, circular, and fan-shaped.
12. The steel bar bundling machine with wire winding inner sleeve cutting according to any one of claims 1 to 11 is characterized in that a pre-bending guide groove is provided on the side of the upper port facing the loop forming plate, and the inner sleeve shears with the edge of the pre-bending guide groove when sliding on the upper port.

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