Torque-variable packing head for thick packing belt

Abstract

The invention discloses a variable-torque packing head for a thick packing belt. The variable-torque packing head comprises a claw frame, a lifting shaft is installed on the claw frame in a sliding mode, a pull rod and a power arm are installed on the lifting shaft, the power arm is in pivot joint with an amplification arm, the amplification arm is in pivot joint with a clamping claw, and the clamping claw is in pivot joint with the claw frame. A locking button is rotationally installed on the power arm, a locking groove is formed in the power arm, the claw frame is fixedly connected with a lower supporting roller frame, a pressing roller supporting piece is pivoted to the lower supporting roller frame, a pressing roller shaft is rotationally installed on the pressing roller supporting piece, a pressing roller is fixed to the pressing roller shaft, a locking column is fixed to the lower supporting roller frame, and a lower supporting roller shaft is fixed to the lower supporting roller frame. And a lower supporting roller and a buckle are rotationally mounted on the lower supporting roller shaft. The power arm and the amplification arm are assembled together, so that the torque of the power arm can be improved, the deformation force of the clamping jaw on the packing belt is further improved, the problem that a general packing machine cannot pack the thick-wall packing belt is solved, the convenience of packing operation is improved, the problem of material damage is avoided, and the packing efficiency can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of baling machines, in particular to a variable torque baling head for thick baling tape. Background Art

[0002] Steel products such as steel pipes, steel coils, and steel strips need to be packed before leaving the factory. Due to the specifications of existing strapping tapes (mainly due to wall thickness restrictions), for situations where the packing tension is extremely high, such as high-strength steel coils with a thickness of more than 16mm, large bundles of steel pipes with a thickness of more than 12mm, etc., the packing exceeds the strength limit of the existing strapping tapes. Usually, mechanical clamping or thick strapping tape (3-4mm thick) welding is used for packing. This type of packaging is not only inconvenient to operate, but also easy to damage the material. Therefore, it is necessary to improve the existing baling machine to meet the packing conditions with high tension requirements. Summary of the invention

[0003] Based on this, it is necessary to provide a variable torque strapping head for thick strapping tape in view of the above technical problems.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a variable torque strapping head for thick strapping tape, comprising a claw frame, a sliding opening is provided on the claw frame, a lifting shaft is slidably installed in the sliding opening, a pull rod and two centrally symmetrical power arms are installed on the lifting shaft, an amplifying arm is pivotally connected to one end of the power arm away from the lifting shaft, a clamping claw is pivotally connected to one end of the clamping claw away from the power arm, and the end of the clamping claw away from the clamping claw is pivotally connected to the claw frame; a locking button is rotatably installed on the power arm, the locking button and the power arm are connected by a torsion spring, and a torsion spring for locking the locking button is provided on the power arm. A locking groove for snap-fitting, when the locking button is snapped into the locking groove, the power arm and the magnifying arm are in an expanded state, and the power arm and the magnifying arm are in contact with each other; it also includes a lower support roller frame fixedly connected to the claw frame, a pressure roller support member is pivotally connected to the lower support roller frame, a pressure roller shaft is rotatably mounted on the pressure roller support member, a pressure roller is fixed on the pressure roller shaft, a lower opening is provided on the lower support roller frame, a locking column is fixed on the lower support roller frame, a lower support roller shaft is fixedly mounted on the lower support roller frame, a lower support roller and a buckle are rotatably mounted on the lower support roller shaft, and the buckle is used to snap-fit ​​with the locking column.

[0005] Preferably, the claw frame includes a first panel, a second panel, a stator and a claw shaft, the stator is located between the first panel and the second panel, the stator is fixedly connected to the first panel and the second panel, the claw shaft passes through the first panel, the second panel and the stator, the claw is mounted on the claw shaft, and the claw is pivotally connected to the claw frame through the claw shaft.

[0006] Preferably, a limiting column cooperating with the pull rod is fixed on the stator, and when the pull rod contacts the limiting column, the pull rod is at the bottom dead point.

[0007] Preferably, a base is fixed on the first panel, a positioning bead is fixedly installed on the base, and a positioning opening for the positioning bead to pass through is opened on the first panel; the power arm and the amplifying arm are pivotally connected through a first connecting rod shaft, and a positioning groove cooperating with the positioning bead is opened at one end of the first connecting rod shaft; when the positioning bead is engaged with the positioning groove, the power arm and the amplifying arm are in a retracted state.

[0008] Preferably, the number of the pivotally connected claws on the amplifying arm is two, and the two claws are respectively located on both sides of the stator.

[0009] Preferably, the magnifying arm comprises a short connecting rod and a handle, and the short connecting rod is fixedly connected to the handle.

[0010] Preferably, the locking button includes a rod body and a button head, the rod body is fixedly connected to the button head, the rod body is rotatably connected to the handle, one end of the torsion spring is connected to the short connecting rod, and the other end of the torsion spring is connected to the button head; the power arm includes a first arc surface and a first abutting portion, and the short connecting rod includes a second abutting portion; when the power arm and the magnifying arm are in the expanded state, the button head is snap-fitted with the locking groove, and the first abutting portion is abutted with the second abutting portion; when the power arm and the magnifying arm switch between the expanded state and the retracted state, the button head contacts and cooperates with the first arc surface.

[0011] Preferably, the short connecting rod and the claw are pivotally connected via a second connecting rod shaft.

[0012] Preferably, an arc groove is provided on the lower supporting roller frame.

[0013] Preferably, a locking cover is fixed to one end of the pressure roller shaft, and the buckle is located between the locking cover and the lower supporting roller frame.

[0014] Compared with the prior art, this technical solution has at least one of the following beneficial effects: The power arm and the magnifying arm of the present invention can be switched between an expanded state and a retracted state. By assembling the power arm and the magnifying arm together, the torque of the power arm can be increased, thereby increasing the deformation force of the clamping claw on the strapping belt, so that the deformation force of the strapping belt is increased by 3-5 times, solving the problem that the general strapping machine cannot strap thick-walled strapping belts, replacing the method of welding strapping belts, improving the convenience of the strapping operation, and avoiding the problem of material damage. It has the function of tightening the strapping belt and clamping the strapping belt and strapping buckle, which can improve the packaging efficiency; By rotating the buckle to engage with the locking column, the locking roller support and the lower supporting roller frame are in a locked state, thereby increasing the strength, allowing the pressure roller to stably press the strapping belt, making it easier to tighten the strapping belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 An exploded view of a packing head according to an embodiment of the present invention; Figure 2A three-dimensional view of a packing head according to an embodiment of the present invention Figure 1 (The power arm and the amplifying arm are in the retracted state); Figure 3 A three-dimensional view of a packing head according to an embodiment of the present invention Figure 2 (The power arm and the amplifying arm are in the retracted state); Figure 4 It is a side view of a packing head according to an embodiment of the present invention (the power arm and the magnifying arm are in a retracted state); Figure 5 A three-dimensional view of a packing head according to an embodiment of the present invention Figure 3 (The power arm and the magnifying arm are in the unfolded state); Figure 6 A three-dimensional view of a packing head according to an embodiment of the present invention Figure 4 (Working state of the clamping claw squeezing the strapping tape); Figure 7 A partial schematic diagram of a packing head and a packing assembly according to an embodiment of the present invention Figure 1 (The power arm and the amplifying arm are in the retracted state); Figure 8 A partial schematic diagram of a packing head and a packing assembly according to an embodiment of the present invention Figure 2 (The power arm and the magnifying arm are in the unfolded state); Fig. 9 A partial schematic diagram of a packing head and a packing assembly according to an embodiment of the present invention Figure 3 (Working state of the clamping claw squeezing the strapping tape); Fig.10 It is a schematic diagram of a partial structure of an embodiment of the present invention (the buckle and the lock post are in a state of being engaged with each other); Fig.11 An exploded view of a claw frame according to an embodiment of the present invention; Fig.12 A three-dimensional diagram of a packaging assembly according to an embodiment of the present invention; In the figure, 1, claw frame; 2, sliding opening; 3, lifting shaft; 4, pull rod; 5, power arm; 6, magnifying arm; 7, claw; 8, locking button; 9, torsion spring; 10, locking groove; 11, lower support roller frame; 12, pressure roller support; 13, pressure roller shaft; 14, pressure roller; 15, lower opening; 16, locking column; 17, lower support roller shaft; 18, lower support roller; 19, buckle; 20, first panel; 21, second panel; 22, stator; 23, claw shaft ; 24. Limiting column; 25. Base; 26. Positioning bead; 27. Positioning port; 28. First connecting rod shaft; 29. ​​Positioning groove; 30. Short connecting rod; 31. Handle; 32. Rod body; 33. Button head; 34. First arc surface; 35. First abutting part; 36. Second abutting part; 37. Second connecting rod shaft; 38. Arc groove; 39. Locking cover; 40. Packing buckle; 41. Packing tape; 42. First notch; 43. Second notch; 44. Limiting notch. DETAILED DESCRIPTION

[0016] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0017] See also Figures 1 to 12 The embodiment of the present application provides a variable torque strapping head for thick strapping tape, including a claw frame 1, a limiting notch 44 for limiting the strapping buckle 40 is provided at the lower part of the claw frame 1, a sliding opening 2 is opened on the claw frame 1, the sliding opening 2 is a waist-shaped hole, a lifting shaft 3 is slidably installed in the sliding opening 2, the diameter of the lifting shaft 3 is adapted to the width of the sliding opening 2, the lifting shaft 3 can move linearly in the sliding opening 2, a pull rod 4 and two centrally symmetrical power arms 5 are installed on the lifting shaft 3, and the lifting shaft 3 and the power arm 5 can rotate Dynamic connection, non-fixed connection, the pull rod 4 is used to connect with the linear motion actuator of the baler, such as a cylinder, the linear motion actuator of the baler is fixedly connected to the claw frame 1, the end of the power arm 5 away from the lifting shaft 3 is pivoted to the magnifying arm 6 through the first connecting rod shaft 28, the power arm 5 and the magnifying arm 6 can rotate relative to each other by a certain angle, the angle is 60° to -6°, the end of the magnifying arm 6 away from the power arm 5 is pivoted to the claw 7 through the second connecting rod shaft 37, and the end of the claw 7 away from the magnifying arm 6 is pivoted to the claw frame 1; A locking button 8 is rotatably mounted on the power arm 5, and the locking button 8 and the power arm 5 are connected by a torsion spring 9. A locking groove 10 for engaging with the locking button 8 is provided on the power arm 5. When the locking button 8 is engaged with the locking groove 10, the power arm 5 and the magnifying arm 6 are in an unfolded state, and the power arm 5 abuts against the magnifying arm 6, and the power arm 5 and the magnifying arm 6 remain locked; the power arm 5 and the magnifying arm 6 are locked and unlocked by the locking button 8 to achieve a fixed connection and a free connection switch; A lower support roller frame 11 is fixedly connected to the claw frame 1, a pressure roller support member 12 is pivotally connected to the lower support roller frame 11 through a pivot shaft, a pressure roller shaft 13 is rotatably mounted on the pressure roller support member 12, specifically, a bearing is fixed to the pressure roller support member 12, and the pressure roller shaft 13 is rotatably mounted on the pressure roller support member 12 through the bearing; A pressure roller 14 is fixed on the pressure roller shaft 13, and the pressure roller shaft 13 is connected to a rotating power element of the baler, such as an air motor. The air motor drives the pressure roller shaft 13 to rotate, thereby driving the pressure roller 14 to rotate; the mounting end of the rotating power element of the baler is fixedly connected to the pressure roller support 12; A lower opening 15 is provided on the lower support roller frame 11, a locking column 16 is fixed on the lower support roller frame 11, a lower support roller shaft 17 is fixedly installed on the lower support roller frame 11, a lower support roller 18 and a buckle 19 are rotatably installed on the lower support roller shaft 17, and the buckle 19 is used to engage with the locking column 16, so as to achieve the effect of improving the strength and facilitating the pressure roller 14 to stably press the packing belt 41.

[0018] The claw frame 1 includes a first panel 20, a second panel 21, a stator 22 and a claw shaft 23. The stator 22 is located between the first panel 20 and the second panel 21. The stator 22 is fixedly connected to the first panel 20 and the second panel 21 through a bolt assembly. The claw shaft 23 passes through the first panel 20, the second panel 21 and the stator 22. The claw shaft 23 is connected to the first panel 20 and the second panel 21 and will not be separated from the first panel 20 and the second panel 21. The claw 7 is mounted on the claw shaft 23, and the claw 7 is pivotally connected to the claw frame 1 through the claw shaft 23. A limited notch 44 is formed at the lower part of the first panel 20, the second panel 21 and the stator 22.

[0019] There are two claws 7 pivotally connected to the amplifying arm 6, and the two claws 7 are respectively located on both sides of the stator 22. The power arm 5 and the amplifying arm 6 are double-layer nested, which can improve strength and save space.

[0020] The magnifying arm 6 includes a short connecting rod 30 and a handle 31, and the short connecting rod 30 is fixedly connected with the handle 31 by bolts. The handle 31 is provided to facilitate manual gripping operation. The magnifying arm 6 and the claw 7 are pivotally connected through the second connecting rod shaft 37, specifically, the short connecting rod 30 and the claw 7 are pivotally connected through the second connecting rod shaft 37.

[0021] The locking button 8 includes a rod body 32 and a button head 33, the rod body 32 is fixedly connected to the button head 33, the button head 33 is in a teardrop shape, the rod body 32 is rotatably connected to the handle 31, a round hole is provided on the handle 31 for the rod body 32 to pass through, and a retaining spring is installed after the rod body 32 passes through the round hole, thereby realizing a rotatable connection with the handle 31; the torsion spring 9 is sleeved on the rod body 32 and is located between the button head 33 and the handle 31, one end of the torsion spring 9 is connected to the short connecting rod 30, and the other end of the torsion spring 9 is connected to the button head 33. Specifically, the short connecting rod 30 is provided with a socket plugged with one end of the torsion spring 9, and the button head 33 is provided with a bayonet socket clamped with the other end of the torsion spring 9, thereby realizing the connection between the torsion spring 9 and the short connecting rod 30 and the torsion spring 9; The power arm 5 includes a first arc surface 34 and a first abutment portion 35, and the short connecting rod 30 includes a second abutment portion 36; when the power arm 5 and the magnifying arm 6 are in the expanded state, under the elastic force of the torsion spring 9, the button head 33 completely enters the locking groove 10, the button head 33 is snap-fitted with the locking groove 10, and the first abutment portion 35 abuts with the second abutment portion 36, thereby limiting the power arm 5 and the magnifying arm 6 from continuing to rotate in the expansion direction after being in the expanded state; when the power arm 5 and the magnifying arm 6 switch between the expanded state and the retracted state, the button head 33 contacts and cooperates with the first arc surface 34, which can facilitate the button head 33 to enter and exit the locking groove 10 again.

[0022] By assembling the power arm 5 and the amplifying arm 6 together, the moment of the power arm 5 is increased.

[0023] The variable torque strapping head for thick strapping tape of this embodiment is used as a part of the strapping machine, and is used after forming the strapping machine together with the linear motion actuator and the rotary power element. The linear motion actuator such as the cylinder and the rotary power element such as the pneumatic motor are common to the general pneumatic strapping machine and are standard parts, so they are not shown in the figure.

[0024] The variable torque strapping head for thick strapping tape of this embodiment is adapted to a special strapping assembly, please refer to Fig.12 The packing assembly is composed of a packing buckle 40 and a packing tape 41. The thickness of the packing tape 41 is 3-4 mm. One end of the packing tape 41 is fixedly welded to the packing buckle 40. Two first notches 42 are provided on both sides of the packing buckle 40. The first notches 42 correspond to the claws 7 one by one. The connecting part of the packing tape 41 and the packing buckle 40 is also provided with a second notch 43 that overlaps with the first notch 42 to facilitate the movement of the claws 7.

[0025] When in use, the power arm 5 and the amplifying arm 6 are in a retracted state. Figure 2 and 7 As shown, the strapping belt 41 is placed on the material to be packaged, and the claw frame 1 is pressed on the strapping buckle 40. At this time, the claw 7 is away from the limiting notch 44, so that the strapping buckle 40 can enter the inner side of the limiting notch 44; The free end of the strapping tape 41 is passed around the strapping material and inserted into the strapping buckle 40 and the lower opening 15. The strapping tape 41 contacts the pressure roller 14 and pushes the pressure roller support member 12 upward. The pressure roller support member 12 can also be manually pulled to rotate upward, so that the strapping tape 41 can enter between the pressure roller 14 and the lower support roller 18. By rotating the pressure roller support member 12 downward, the pressure roller shaft 13 and the pressure roller 14 are driven to descend. By rotating the buckle 19, Fig.10 As shown, the buckle 19 is rotated to engage with the locking column 16, at which time the pressure roller 14 presses the strapping belt 41 onto the lower support roller 18, and the buckle 19 limits the upward rotation of the pressure roller support 12. The buckle 19 is used to lock the pressure roller support 12 and the lower support roller frame 11, so that the locking pressure roller support 12 and the lower support roller frame 11 are in a locked state, thereby achieving the effect of improving the strength and facilitating the pressure roller 14 to stably press the strapping belt 41; The pressure roller shaft 13 and the pressure roller 14 are driven to rotate by a rotating power element such as a pneumatic motor, thereby driving the strapping belt 41 to move and tighten the strapping belt 41; like Figure 5 and Figure 8 As shown, the magnifying arms 6 on both sides are pulled to gradually open the power arm 5, and the angle between the magnifying arms 6 and the power arm 5 exceeds 180°, reaching 186°. At this time, the locking button 8 is clamped into the locking groove 10 of the power arm 5 under the action of the torsion spring 9, and the first abutting portion 35 abuts against the second abutting portion 36, so that the magnifying arm 6 and the power arm 5 are reversely clamped; the magnifying arm 6 and the power arm 5 are stably maintained in an integrated state without relative movement. The state at this time is as shown in FIG. Figure 5 and Figure 6 As shown, at this time, the claw end of the claw 7 will enter the inner side of the first notch 42, but will not enter the inner side of the packing buckle 40; Subsequently, a linear motion actuator such as a cylinder mounted on the claw frame 1 and connected to the pull rod 4 is started. Figure 6 and Fig. 9 As shown, the pull rod 4 is pushed downward, and the pull rod 4 drives the lifting shaft 3 to slide downward in the sliding opening 2. The claw 7 rotates around the claw shaft 23 as the lifting shaft 3 moves downward, and the claw end of the claw 7 enters the second notch 43, and passes through the first notch 42 to enter the inner side of the packing buckle 40, and is pressed and contacted with the packing belt 41 inside the packing buckle 40, so that the packing belt 41 is partially deformed and torn, and the deformed part is stuck in the upper part of the first notch 42, so that it is tightly stuck in the packing buckle 40, so that the packing belt 41 is fixed, and the materials to be packed are stably tied; After the packing is completed, the linear motion actuator is started to raise the pull rod 4 to the highest position, and the locking buttons 8 on both sides are turned to release the locking state between the magnifying arms 6 and the power arms 5 on both sides, and the magnifying arms 6 on both sides are rotated in the opposite direction to drive the power arms 5 on both sides to retract inward to the retracted state, and the claws 7 are away from the packing buckle 40 and the packing belt 41; The rotating power element such as the pneumatic motor is turned off to unload the tension force of the pressure roller 14, and the buckle 19 is released so that the buckle 19 is away from the locking column 16, and the locking state between the support frame of the pressure roller 14 and the lower support roller frame 11 is released. The baler is removed from the side so that the baling belt 41 moves out of the baler laterally from the lower opening 15, and a baling process is completed.

[0026] By combining the tensioning function of the strapping belt 41 and the clamping function of the strapping belt 41 and the strapping buckle 40 into one, the packaging efficiency can be improved. By changing the torque length of the power arm 5, the deformation force is increased by 3-5 times, which solves the problem that the general packaging machine cannot package the thick-walled strapping belt 41 with a thickness of 3-4mm. The packaging machine can be improved on the basis of the existing packaging machine to achieve the purpose of using thick strapping belt 41. The packaging machine suitable for high tensioning force requirements can be manually operated or configured on an automated production line. By increasing the torque of the power arm 5, the deformation force of the strapping belt 41 is increased, which replaces the welded strapping belt 41, improves the convenience of packaging operation, and avoids the problem of material damage.

[0027] As a preferred embodiment, in order to facilitate limiting the descending height of the pull rod 4, a limit column 24 is fixed on the stator 22 and is arranged to cooperate with the pull rod 4. When the pull rod 4 contacts the limit column 24, the pull rod 4 cannot continue to descend. At this time, the pull rod 4 is at the lower dead point, and the claw end of the claw 7 will be inserted into the strapping belt 41 in the strapping buckle 40, causing the strapping belt 41 to be locally deformed and torn, and tightly stuck in the strapping buckle 40 to fix the strapping belt 41.

[0028] As a preferred embodiment, in order to facilitate the power arm 5 and the magnifying arm 6 to maintain a relatively stable contracted state, a base 25 is fixed on the first panel 20, a positioning bead 26 is fixedly installed on the base 25, and a positioning opening 27 for the positioning bead 26 to pass through is provided on the first panel 20; the power arm 5 and the magnifying arm 6 are pivotally connected through a first connecting rod shaft 28, and a positioning groove 29 is provided at one end of the first connecting rod shaft 28 to cooperate with the positioning bead 26; when the positioning bead 26 is engaged with the positioning groove 29, the power arm 5 and the magnifying arm 6 are in a contracted state. Two bases 25 are provided, and positioning beads 26 are installed on both bases 25. The positioning beads 26 correspond to the first connecting rod shaft 28 one by one. When the power arm 5 and the magnifying arm 6 are in a contracted state, the first connecting rod shaft 28 rotates to the positioning bead 26, and the ball head of the positioning bead 26 automatically pops out and is inserted into the positioning groove 29. The first connecting rod shaft 28 is temporarily clamped by the positioning bead 26 to limit the first connecting rod shaft 28, which plays the role of shrinking positioning and temporarily fixing the power arm 5. In this state, the claw 7 is separated from the packaging assembly, which facilitates the separation of the packaging head from the packaging assembly.

[0029] As a preferred embodiment, in order to facilitate the installation of the buckle 19 on the roller shaft 13, a buckle pressing cover 39 is fixed to one end of the roller shaft 13, and the buckle 19 is located between the buckle pressing cover 39 and the lower support roller frame 11. An internal threaded hole is provided at one end of the roller shaft 13, and the buckle pressing cover 39 is in a cone shape, and a mounting hole for mounting a bolt is provided in the middle. One end of the bolt passes through the mounting hole and is threadedly connected with the internal threaded hole at one end of the roller shaft 13. By providing the buckle pressing cover 39, the buckle 19 is restricted between the buckle pressing cover 39 and the lower support roller frame 11, and the buckle 19 is convenient to rotate on the roller shaft 13.

[0030] As a preferred embodiment, in order to facilitate the roller support 12 to drive the roller 14 to rotate, and to reduce the weight of the lower support roller frame 11 while maintaining the overall strength of the lower support roller frame 11, an arc groove 38 is provided on the lower support roller frame 11. When the roller support 12 drives the roller 14 to rotate, it can move in the arc groove 38; when the roller 14 presses the strapping belt 41, the roller 14 approaches the inner wall of the arc groove 38, but does not contact the inner wall of the arc groove 38.

[0031] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" 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.

Claims

1. A variable torque strapping head for thick strapping tape, comprising a claw frame (1), characterized in that: The claw frame (1) is provided with a sliding opening (2), a lifting shaft (3) is slidably installed in the sliding opening (2), a pull rod (4) and two centrally symmetrical power arms (5) are installed on the lifting shaft (3), an end of the power arm (5) away from the lifting shaft (3) is pivotally connected to an amplifying arm (6), an end of the amplifying arm (6) away from the power arm (5) is pivotally connected to a clamping claw (7), and an end of the clamping claw (7) away from the amplifying arm (6) is pivotally connected to the claw frame (1); a locking button (8) is rotatably installed on the power arm (5), the locking button (8) and the power arm (5) are connected via a torsion spring (9), a locking groove (10) for clamping with the locking button (8) is provided on the power arm (5), and when the locking button (8) is clamped into the locking groove (10), the power arm (5) and the magnifying arm (6) are in an unfolded state, and the power arm (5) is in contact with the magnifying arm (6); it also includes a lower support roller frame (11) fixedly connected to the claw frame (1), a pressure roller support member (12) is pivotally connected to the lower support roller frame (11), a pressure roller shaft (13) is rotatably mounted on the pressure roller support member (12), a pressure roller (14) is fixed on the pressure roller shaft (13), a lower opening (15) is provided on the lower support roller frame (11), a locking column (16) is fixed on the lower support roller frame (11), a lower support roller shaft (17) is fixedly mounted on the lower support roller frame (11), a lower support roller (18) and a buckle (19) are rotatably mounted on the lower support roller shaft (17), and the buckle (19) is used to engage with the locking column (16).

2. The variable torque strapping head for thick strapping tape according to claim 1, characterized in that: The claw frame (1) comprises a first panel (20), a second panel (21), a stator (22) and a claw shaft (23); the stator (22) is located between the first panel (20) and the second panel (21); the stator (22) is fixedly connected to the first panel (20) and the second panel (21); the claw shaft (23) passes through the first panel (20), the second panel (21) and the stator (22); the claw (7) is mounted on the claw shaft (23); and the claw (7) is pivotally connected to the claw frame (1) via the claw shaft (23).

3. The variable torque strapping head for thick strapping tape according to claim 2, characterized in that: A limiting column (24) is fixed on the stator (22) and is arranged in cooperation with the pull rod (4). When the pull rod (4) contacts the limiting column (24), the pull rod (4) is at the bottom dead point.

4. The variable torque strapping head for thick strapping tape according to claim 2, characterized in that: A base (25) is fixed on the first panel (20), a positioning bead (26) is fixedly mounted on the base (25), and a positioning opening (27) is provided on the first panel (20) for the positioning bead (26) to pass through; the power arm (5) and the amplifying arm (6) are pivotally connected via a first connecting rod shaft (28), and a positioning groove (29) is provided at one end of the first connecting rod shaft (28) and is arranged to cooperate with the positioning bead (26); when the positioning bead (26) is engaged with the positioning groove (29), the power arm (5) and the amplifying arm (6) are in a retracted state.

5. The variable torque strapping head for thick strapping tape according to claim 2, characterized in that: There are two claws (7) pivotally connected to the amplifying arm (6), and the two claws (7) are respectively located on both sides of the stator (22).

6. The variable torque strapping head for thick strapping tape according to claim 1, characterized in that: The magnifying arm (6) comprises a short connecting rod (30) and a handle (31), and the short connecting rod (30) is fixedly connected to the handle (31).

7. The variable torque strapping head for thick strapping tape according to claim 6, characterized in that: The locking button (8) comprises a rod body (32) and a button head (33), the rod body (32) and the button head (33) are fixedly connected, the rod body (32) and the handle (31) are rotatably connected, one end of the torsion spring (9) is connected to the short connecting rod (30), and the other end of the torsion spring (9) is connected to the button head (33); the power arm (5) comprises a first arc surface (34) and a first abutting portion (35), and the short connecting rod (30) comprises a second abutting portion (36); when the power arm (5) and the magnifying arm (6) are in an extended state, the button head (33) and the locking groove (10) are engaged, and the first abutting portion (35) and the second abutting portion (36) are in abutment; when the power arm (5) and the magnifying arm (6) are switched between an extended state and a retracted state, the button head (33) and the first arc surface (34) are in contact and engagement.

8. The variable torque strapping head for thick strapping tape according to claim 6, characterized in that: The short connecting rod (30) and the claw (7) are pivotally connected via a second connecting rod shaft (37).

9. The variable torque strapping head for thick strapping tape according to claim 1, characterized in that: The lower supporting roller frame (11) is provided with an arc-shaped groove (38).

10. The variable torque strapping head for thick strapping tape according to claim 1, characterized in that: A locking cover (39) is fixed to one end of the pressure roller shaft (13), and the buckle (19) is located between the locking cover (39) and the lower support roller frame (11).

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