Binding machine with double-pulling-pin-shaft wire winding mechanism

Abstract

The utility model relates to the technical field of strapping machines, and particularly discloses a strapping machine with a double-pulling-pin-shaft wire winding mechanism. The wire winding mechanism comprises a fixed clamping piece, a movable sleeve which is arranged outside the fixed clamping piece and can move relative to the axial direction, a driving assembly used for driving the movable sleeve, a first clamping jaw and a second clamping jaw, wherein the first clamping jaw and the second clamping jaw are connected with the fixed clamping piece. The first clamping jaw is provided with a first fixing pin shaft hinged to the fixed clamping piece, and the second clamping jaw is provided with a second fixing pin shaft hinged to the fixed clamping piece. A movable pin shaft is arranged in the movable sleeve, and opening and closing guide holes allowing the movable pin shaft to penetrate through are formed in the first clamping jaw and the second clamping jaw respectively. Compared with a traditional structure that two clamping jaws share the same pin shaft, the two pin shafts are adopted to be hinged to the two clamping jaws respectively, the two clamping jaws rotate around the independent pin shafts respectively, the problem that the two clamping jaws are abraded in the rotating process is solved, the durability of the clamping jaws is improved, and the service life of the strapping machine is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of strapping machine technology, and specifically discloses a strapping machine with a double-pull pin winding mechanism. Background Technology

[0002] A tying machine is a handheld tool widely used in the construction industry, mainly for tying materials such as steel bars. With its efficient and convenient operation, this tool greatly improves the work efficiency of workers in tying operations. The use of tying machines not only ensures the tightness and reliability of tying, but also plays an important role in improving the stability and safety of building structures. As the construction industry continues to increase its requirements for construction efficiency and quality, tying machines have become one of the indispensable tools on construction sites.

[0003] The structural design of a binding machine typically includes several key components such as the housing, wire feeding mechanism, and wire winding mechanism. Taking a binding machine disclosed in patent 201680036175.5 as an example, its wire winding mechanism includes left and right grippers connected by a fixed shaft and an opening / closing pin. By controlling the movement of the opening / closing pin away from or towards the fixed shaft, the left and right grippers can rotate towards or away from each other around the fixed shaft, thereby controlling the gripping action. This design allows the grippers to flexibly grip and release the reinforcing bars to complete the binding operation. However, in actual use, it has been found that the two grippers of this existing wire winding mechanism suffer from severe wear, and are prone to damage after repeated use, resulting in a short service life. Therefore, a solution is needed to address the problem of poor gripper durability in the wire winding mechanism. Utility Model Content

[0004] The severe wear of the grippers in the existing technology is identified through analysis as being due to the two grippers being hinged around the same fixed axis. When the grippers rotate, a significant shearing force is generated at the hinge point, which easily leads to gripper damage and reduced service life after repeated use. The purpose of this invention is to overcome the shortcomings of the existing technology and provide a strapping machine with a double-pull pin winding mechanism.

[0005] This utility model discloses a binding machine with a double-pull pin winding mechanism, which adopts the following technical solution:

[0006] A strapping machine with a double-pull pin winding mechanism includes a fixed clamping member, a movable sleeve disposed outside the fixed clamping member and movable relative to it axially, a drive assembly for driving the movable sleeve, and a first gripper and a second gripper connected to the fixed clamping member. The first gripper is hinged to the fixed clamping member by a first fixed pin, and the second gripper is hinged to the fixed clamping member by a second fixed pin. A movable pin is provided inside the movable sleeve, and the first gripper and the second gripper are respectively provided with opening and closing guide holes for the movable pin to pass through. The movable sleeve drives the movable pin to move in the opening and closing guide holes, so that the first gripper and the second gripper rotate and open and close around the first fixed pin and the second fixed pin, respectively.

[0007] Preferably, along the moving direction of the movable sleeve, the first fixed pin is located in front of the second fixed pin.

[0008] Preferably, the movable pin, the first fixed pin, and the second fixed pin are on the same straight line.

[0009] Preferably, the second gripper has a clearance hole or clearance groove for the first fixing pin to pass through and move relative to it.

[0010] Preferably, the fixing clamp has a mounting groove, and the first clamp and the second clamp are disposed in the mounting groove of the fixing clamp.

[0011] Preferably, the mounting groove of the fixing clamp is provided with a first pin hole and a second pin hole on both sides. The first fixing pin is axially connected through the two first pin holes, and the second fixing pin is axially connected through the two second pin holes.

[0012] Preferably, the mounting groove of the fixing clamp is provided with a strip-shaped hole through the two side walls for the movable pin to move axially.

[0013] Preferably, the opening and closing guide hole includes a first retaining part, a rotating guide part, and a second retaining part; the first retaining part extends along the moving direction of the movable pin, the rotating guide part is connected to the end of the first retaining part and extends obliquely outward, and the second retaining part is connected to the end of the rotating guide part and extends along the moving direction of the movable pin.

[0014] Preferably, the drive assembly includes a drive motor and a lead screw mounted on the output end of the drive motor. The movable sleeve is threaded onto the outside of the lead screw, and the fixed clamping member is rotatably connected to the end of the lead screw. The housing is provided with a limiting member for restricting the rotation of the movable sleeve. After the movable sleeve moves forward to a set distance, it disengages from the limiting member and rotates with the lead screw.

[0015] Preferably, the limiting member includes two limiting arms and a return spring mounted on the limiting arms, a limiting through groove is formed between the two limiting arms, and the movable sleeve is provided with a guide protrusion that matches the limiting through groove.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] Compared to the traditional structure where two grippers share the same pivot pin, this invention uses two pivot pins to hinge the two grippers separately, allowing each gripper to rotate around an independent pivot pin. This effectively reduces the shearing force between the two grippers, minimizes wear during rotation, improves gripper durability, and extends the service life of the strapping machine. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the binding machine with a double-pull pin winding mechanism according to the present invention;

[0019] Figure 2 This is a schematic diagram of the wire winding mechanism of this utility model;

[0020] Figure 3 This is a schematic diagram of the gripper of this utility model in the open state;

[0021] Figure 4 This is a schematic diagram of the clamping claws of this utility model in the closed state;

[0022] Figure 5 This is a schematic diagram of the structure of the second gripper of this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the fixing clamp of this utility model;

[0024] Figure 7 This is a schematic diagram of the assembly of the fixing clamping component, the first clamp, and the second clamp of this utility model.

[0025] Explanation of icon numbers:

[0026] 1. Housing; 2. Fixing clamp; 21. Mounting slot; 22. First pin hole; 23. Second pin hole; 24. Strip hole; 3. Moving sleeve; 31. Limiting component; 4. Drive assembly; 41. Drive motor; 42. Lead screw; 5. First gripper; 6. Second gripper; 61. Opening / closing guide hole; 611. First holding part; 612. Rotation guide part; 613. Second holding part; 62. Clearance hole; 7. First fixed pin; 8. Second fixed pin; 9. Movable pin. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] A strapping machine with a double-pull pin winding mechanism, as shown in the figure, includes a housing 1 and a winding mechanism. The winding mechanism includes a fixed clamping member 2, a movable sleeve 3 disposed outside the fixed clamping member 2 and movable relative to it axially, a drive assembly 4 for driving the movable sleeve 3, and a first gripper 5 and a second gripper 6 connected to the fixed clamping member 2.

[0029] The drive assembly 4 includes a drive motor 41 and a lead screw 42 mounted on the output end of the drive motor 41. The movable sleeve 3 is threaded onto the lead screw 42, and the fixed clamping member 2 is rotatably connected to the end of the lead screw 42. The housing 1 is provided with a limiting member 31 for restricting the rotation of the movable sleeve 3. After the movable sleeve 3 moves forward to a set distance, it disengages from the limiting member 31 and rotates with the lead screw 42. Specifically, the limiting member 31 includes two limiting arms of different lengths and a return spring mounted on the limiting arms. A limiting groove is formed between the two limiting arms. The movable sleeve 3 is provided with a guide protrusion that matches the limiting groove. The return spring is used to make the two limiting arms tend to open, so that when the movable sleeve reverses, the guide protrusion is re-restricted in the limiting groove. When in the wire feeding state, the guide protrusion is in the limiting groove, which restricts the rotation of the movable sleeve 3 and drives it forward. As the movable sleeve 3 moves forward, it sequentially completes the clamping-pulling-cutting-bending operations. Afterward, the guide protrusion is released from the rotation restriction of the limiting groove, allowing the movable sleeve 3 to be driven to rotate and thus achieve the binding operation of the wire. After binding is completed, the drive motor 41 reverses and drives the guide protrusion to be restricted to rotate again by the limiting groove, thereby causing the movable sleeve 3 to return to its initial position. The driving and binding principles of the movable sleeve 3 are existing technologies of binding machines, and therefore will not be described in detail in this embodiment.

[0030] To address the wear problem of grippers in existing technologies, referring to the figure, the first gripper 5 of this solution is hinged to the fixed clamping member 2 with a first fixing pin, and the second gripper 6 is hinged to the fixed clamping member 2 with a second fixing pin. A movable pin 9 is provided inside the movable sleeve 3. Opening and closing guide holes 61 for the movable pin 9 to pass through are provided on both the first gripper 5 and the second gripper 6. The opening and closing guide holes 61 of the two grippers are symmetrical and identical in shape. Specifically, taking the second gripper 6 as an example, the opening and closing guide hole 61 includes a first holding part 611, a rotation guide part 612, and a second holding part 613. The first holding part 611 extends along the moving direction of the movable pin 9. The rotation guide part 612 connects to the end of the first holding part 611 and extends obliquely outward (relative to the outside of the other gripper). The second holding part 613 connects to the end of the rotation guide part 612 and extends along the moving direction of the movable pin 9. When the movable pin 9 moves relative to the position of the rotation guide part 612, the gripper can be traction-rotated.

[0031] As a preferred embodiment, along the moving direction of the movable sleeve, the first fixed pin is located in front of the second fixed pin. Furthermore, the movable pin 9, the first fixed pin, and the second fixed pin are aligned in a straight line. Compared to arranging the two fixed pins in a left-right configuration, arranging them in a front-back configuration, aligned in a straight line with the movable pin 9, optimizes the structure, reduces product size, and makes the strapping machine more compact and lightweight. When adopting the above optimized layout design, a clearance hole 62 can be provided on the second gripper 6 for the first fixed pin to pass through and move relative to it. This ensures smooth clamping and closing of the two grippers while providing force-bearing entities on both sides of the clearance hole 62 of the second gripper 6, improving the structural strength of the second gripper 6. Of course, the clearance hole 62 can also be replaced by a clearance groove with an opening on one side.

[0032] As a preferred embodiment, referring to the figure, the fixing clamp 2 is a rod-shaped structure with a mounting groove 21, and the first clamp 5 and the second clamp 6 are disposed in the mounting groove 21 of the fixing clamp 2. Two opposing first pin holes 22 and two opposing second pin holes 23 are respectively opened through the two side walls of the mounting groove 21 of the fixing clamp 2. The first fixing pin is axially connected through the two first pin holes 22, and the second fixing pin is axially connected through the two second pin holes 23. Two opposing strip holes 24 are also opened through the two side walls of the mounting groove 21 of the fixing clamp 2, and the movable pin 9 can move axially through the strip holes 24 of the fixing clamp 2. By adopting the above design, the fixing clamp 2 can be made into a rod-shaped structure with more stable structural strength, and the connection stability of the first fixing pin, the second fixing pin, and the movable pin 9 is also better. Of course, the fixing clamp 2 can also be other irregular structures that can avoid the movement of the clamps.

[0033] The principle of this solution is as follows: When the movable sleeve 3 is driven by the drive component 4 to move relative to the fixed clamping part 2, the movable pin 9 moves synchronously with the movable sleeve 3. The movable pin 9 moves back and forth in the rotation guide part 612 of the opening and closing guide hole 61, thereby driving the two clamping jaws to rotate. Since this solution uses two independent pins that are hinged to the two clamping jaws respectively, the first clamping jaw 5 and the second clamping jaw 6 rotate and open and close around the first fixed pin and the second fixed pin respectively. This avoids the problem of large shearing force between the two clamping jaws that exists in the conventional design where the two clamping jaws share a pin, reduces the wear of the clamping jaws during rotation, enhances the durability of the clamping jaws, and thus extends the working life of the strapping machine.

[0034] The technical solution provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A bundling machine with a double-pulling pin shaft winding mechanism, comprising a machine housing and a winding mechanism, the winding mechanism comprising a fixed holder, a movable sleeve arranged outside the fixed holder and movable axially relative to the fixed holder, a driving assembly for driving the movable sleeve, and a first jaw and a second jaw connected with the fixed holder; characterized in that the first jaw is provided with a first fixed pin shaft hinged with the fixed holder, and the second jaw is provided with a second fixed pin shaft hinged with the fixed holder; the movable sleeve is provided with a movable pin shaft, and the first jaw and the second jaw are respectively provided with an opening and closing guide hole through which the movable pin shaft passes; the movable sleeve drives the movable pin shaft to move in the opening and closing guide hole, so that the first jaw and the second jaw are respectively rotated to open and close around the first fixed pin shaft and the second fixed pin shaft. Along the moving direction of the movable sleeve, the first fixed pin shaft is located in front of the second fixed pin shaft. The movable pin shaft, the first fixed pin shaft and the second fixed pin shaft are located on the same straight line. The second jaw is provided with an avoidance hole or avoidance groove through which the first fixed pin shaft passes and relatively moves.

2. The strapping machine with a dual-pull pin spooling mechanism of claim 1, wherein, The fixed holder has a mounting groove, and the first jaw and the second jaw are arranged in the mounting groove of the fixed holder.

3. The strapping machine with a dual-pull pin spooling mechanism of claim 2, wherein, The mounting groove of the fixed holder is provided with a first pin shaft hole and a second pin shaft hole penetrating through the two side walls, the first fixed pin shaft is connected through the two first pin shaft holes, and the second fixed pin shaft is connected through the two second pin shaft holes.

4. The strapping machine with a dual-pull pin spooling mechanism of claim 3, wherein, The mounting groove of the fixed holder is provided with a strip-shaped hole penetrating through the two side walls for axial movement of the movable pin shaft.

5. The strapping machine with dual pull pin spooling mechanism of claim 1, wherein, The opening and closing guide hole comprises a first retaining portion, a rotating guide portion and a second retaining portion; the first retaining portion is arranged in extension along the moving direction of the movable pin shaft, the rotating guide portion is communicated with the end of the first retaining portion and arranged in extension outwardly and obliquely, and the second retaining portion is communicated with the end of the rotating guide portion and arranged in extension along the moving direction of the movable pin shaft.

6. The strapping machine with dual pull pin spooling mechanism of claim 5, wherein, The driving assembly comprises a driving motor and a lead screw assembled at the output end of the driving motor, the movable sleeve is threadedly assembled outside the lead screw, and the fixed holder is rotationally connected with the end of the lead screw; the machine housing is provided with a limiting member for limiting the rotation of the movable sleeve, and the movable sleeve is separated from the limiting member and rotates with the lead screw after moving forward to a set distance.

7. The strapping machine with dual pull pin spooling mechanism of claim 5, wherein, The limiting member comprises two limiting arms and a return spring assembled on the limiting arms, a limiting through groove is formed between the two limiting arms, and the movable sleeve is provided with a guide protrusion matched with the limiting through groove.

8. The strapping machine with dual pull pin spooling mechanism of claim 1, wherein, ​ 9. The strapping machine with a double-pull pin spooling mechanism according to any one of claims 1-8, characterized in that, ​ 10. The strapping machine with dual pull pin spooling mechanism of claim 9, wherein, ​

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