A high stability baling machine weld assembly

Abstract

The utility model relates to packing machine technical field discloses a kind of high-stability packing machine fusion assembly, including mounting bracket, motor, driving shaft and friction pressure head, motor is fixedly connected in the upper end of mounting bracket, the upper end of driving shaft is connected with the output shaft of motor, friction pressure head is slidably connected with the lower end of mounting bracket, the upper end of friction pressure head is equipped with driving groove, the lower end of driving shaft is equipped with eccentric circular platform, eccentric circular platform is located in driving groove, and eccentric circular platform and driving groove roll friction fit. Compared with prior art, the utility model can effectively improve the transmission stability of friction pressure cutter, and facilitate disassembly and repair.

Description

Technical Field

[0001] This utility model relates to the field of packaging machine technology, specifically to a high-stability packaging machine welding component. Background Technology

[0002] To achieve the reciprocating motion of the friction clamping knife for welding strapping, existing technologies often employ multi-link combined transmission structures. A typical example is a transmission scheme using a rocker arm, connecting rod, and cam-type drive component, such as the structure disclosed in utility model patent CN223001768U. This type of structure requires power to be transmitted sequentially through multiple components such as a transmission shaft sleeve, rollers, sliding plates, connecting rods, and rocker arms to ultimately drive the friction clamping knife. However, this multi-link superimposed transmission design has inherent defects: on the one hand, when the crests and troughs of the drive boss alternately contact the rollers, periodic impact loads are generated. Combined with the hinge gaps between the connecting rods and the rocker arm, vibrations are easily triggered during operation, resulting in significant noise. This noise pollution is particularly prominent in high-speed welding scenarios, affecting the working environment. On the other hand, the clearances at multiple hinge points in the transmission chain accumulate, leading to a decrease in the reciprocating motion accuracy of the friction pressure knife, resulting in slight deviations or wobbling. This not only reduces the consistency of the welding quality of the strapping tape but may also exacerbate component wear due to unstable movement, indirectly affecting welding efficiency and the stability of strapping quality.

[0003] In view of this, the applicant conducted in-depth research on the above-mentioned issues, which led to this case. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a highly stable welding assembly for a packing machine, which can effectively improve the transmission stability of the friction pressure knife and facilitate disassembly and maintenance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A high-stability packing machine welding assembly includes a mounting frame, a motor, a drive shaft, and a friction head. The motor is fixedly connected to the upper end of the mounting frame, the upper end of the drive shaft is connected to the output shaft of the motor, and the friction head is slidably connected to the lower end of the mounting frame. The upper end of the friction head is provided with a drive groove, and the lower end of the drive shaft is provided with an eccentric frustum. The eccentric frustum is located in the drive groove, and the eccentric frustum and the drive groove are in rolling friction engagement.

[0006] Furthermore, the upper end of the friction head is provided with a fixedly connected adapter, and the drive groove is located at the upper end of the adapter.

[0007] Furthermore, a first bearing is fitted on the eccentric circular platform, and the drive groove includes a drive part and clearance parts on both sides of the drive part. The drive part and the first bearing cooperate with each other, and the clearance parts provide clearance when the first bearing swings.

[0008] Furthermore, the upper end of the friction head is provided with a slider, the lower end of the mounting bracket is provided with a sliding groove that slides with the slider, the two side walls of the slider are provided with a first guide groove, the side wall of the groove is provided with a second guide groove corresponding to the side of the first guide groove, and the first guide groove and the second guide groove are provided with balls.

[0009] Furthermore, the lower end of the adapter is provided with a connecting groove, and the upper end of the slider is provided with a connecting boss, which is embedded in the connecting groove for engagement.

[0010] Furthermore, the bottom of the drive groove is provided with a countersunk hole that communicates with the connecting groove, and the connecting boss is provided with a threaded hole that communicates with the countersunk hole.

[0011] Furthermore, the mounting frame includes an upper frame and a lower frame connected vertically, with the motor fixedly mounted in the upper frame.

[0012] Furthermore, the lower frame body is provided with mounting holes, and a plurality of second bearings are provided in the mounting holes, the second bearings being sleeved on the drive shaft.

[0013] Furthermore, the lower end of the lower frame is provided with a cutter that is fixedly connected.

[0014] This invention provides a highly stable welding assembly for a packing machine. It offers the following advantages: 1. This utility model completely eliminates redundant transmission components such as swing arms and connecting rods, significantly shortening the transmission chain. The overall structure is more compact, the weight of transmission components is significantly reduced, transmission inertia is reduced, and the load on the motor during startup and operation is lowered. Furthermore, this utility model drives the friction pressure head through an eccentric frustum, greatly reducing friction links, and all friction is rolling friction, avoiding friction loss and clearance accumulation at multiple hinge points. The bearings are subjected to more uniform force, are less prone to damage from alternating loads and impacts, significantly extending the service life of core components and reducing maintenance frequency and costs.

[0015] 2. The eccentric frustum and the first bearing in this invention replace the alternating impact contact between the traditional drive boss and the roller. The first bearing smoothly oscillates within the drive section of the drive groove, without periodic impact loads, thus reducing vibration at its source. The friction head is guided by a linear guide structure of balls and guide grooves. The limiting effect of the first and second guide grooves on the balls ensures that the friction head moves back and forth without deviation or wobbling, with a precise motion trajectory, avoiding motion deviations caused by multiple hinge gaps in existing technologies. The low resistance characteristics of rolling friction and the smooth transmission method significantly reduce operating noise, especially in high-speed welding scenarios, effectively improving the working environment and solving the noise pollution problem of traditional equipment.

[0016] 3. The short transmission path in this utility model reduces energy loss during the energy transfer process. The power output by the motor can be directly transmitted to the friction head, which significantly improves the transmission efficiency and the effective power utilization rate. The improved transmission efficiency makes the friction head respond faster and the reciprocating motion frequency more stable, which indirectly improves the efficiency of cable tie welding.

[0017] 4. In this invention, the linear guide rail structure guides and limits the friction head, ensuring that it always moves along a fixed trajectory without any slight deviation or wobbling. The contact position between the friction part and the cable tie is precise and stable. The clearance between the eccentric frustum and the drive groove is controllable, and the first bearing only contacts the drive part for transmission, avoiding unnecessary swaying or deviation, further ensuring the motion accuracy of the friction head. The stable motion trajectory and precise friction contact make the temperature distribution and bonding force of the cable tie welding more uniform, effectively improving the strength and consistency of the welded joint and solving the problem of welding quality fluctuation in traditional equipment.

[0018] 5. In this utility model, the mounting frame is divided into an upper frame and a lower frame, which makes the installation and maintenance space of components such as motor, drive shaft, and second bearing more reasonable and facilitates daily maintenance. The overall structure does not have a complex multi-link series design, and the number of parts is reduced, which not only reduces the difficulty of processing and assembly, but also reduces the number of failure points and lowers the subsequent maintenance cost. Attached Figure Description

[0019] Figure 1 This is a perspective view of the external structure of this utility model; Figure 2 This is a three-dimensional side sectional view of the present invention. Figure 3 This is a three-dimensional view of the front cross-sectional structure of this utility model; Figure 4 A three-dimensional view of the external structure of the drive shaft; Figure 5 This is a three-dimensional view of the external structure of the friction indenter; Figure 6 This is a schematic diagram of the drive slot structure; Figure 7 This is a 3D view of the adapter's external structure.

[0020] The components include: mounting bracket 1, slide groove 11, upper frame 12, lower frame 13, motor 2, drive shaft 3, eccentric frustum 31, adapter 4, drive groove 41, drive part 411, clearance part 412, connecting groove 42, countersunk hole 43, friction head 5, slider 51, connecting boss 511, threaded hole 512, first bearing 61, second bearing 62, first guide groove 71, second guide groove 72, ball bearing 73, and cutter 8. Detailed Implementation

[0021] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] Please see the appendix Figure 1 - Appendix Figure 7 This utility model provides a highly stable strapping machine welding assembly, including a mounting frame 1, a motor 2, a drive shaft 3, an adapter 4, and a friction head 5. The motor 2 is fixedly connected to the upper end of the mounting frame 1, the upper end of the drive shaft 3 is connected to the output shaft of the motor 2, and the friction head 5 is slidably connected to the lower end of the mounting frame 1, allowing the friction head 5 to slide along the front-back direction on the mounting frame 1. The upper end of the friction head 5 is fixedly connected to the lower end of the adapter 4, and the lower end of the friction head 5 is provided with a friction part. By repeatedly rubbing the strap back and forth with the friction part, the strap is welded. The lower end of the drive shaft 3 is provided with an eccentric frustum 31, and the upper end of the adapter 4 is provided with a drive groove 41 that mates with the eccentric frustum 31. With the above structure, the motor 2 is directly connected to the drive shaft 3 and the friction head 5. The motor 2 drives the drive shaft 3 to rotate, and the drive shaft 3 drives the eccentric frustum 31 to rotate during the rotation. The eccentric frustum 31 mates with the drive groove 41, causing the friction head 5 to move repeatedly along the front-back direction on the mounting frame 1.

[0023] In this embodiment, a first bearing 61 is fitted onto the eccentric frustum 31. The drive groove 41 includes a drive portion 411 disposed in the front-back direction of the drive groove 41, and clearance portions 412 disposed on both sides of the drive portion 411. The drive portion 411 cooperates with the first bearing 61, and the clearance portions 412 provide clearance for the first bearing 61 when it swings. Specifically, the distance between the drive portions 411 is D1, and the size of D1 is equal to the diameter of the bearing. The distance between the clearance portions 412 is D2, and the size of D2 is larger than the diameter of the bearing, making the groove of the drive groove 41 racetrack shaped. In this way, when the first bearing 61 swings, it will only contact the side wall of the drive portion 411, and will not contact the side wall of the clearance portion 412, thus driving the friction head 5 to move back and forth.

[0024] In this embodiment, the upper end of the friction head 5 is provided with a slider 51, and the lower end of the mounting bracket 1 is provided with a slide groove 11 that slides with the slider 51, extending in the front-back direction. The sidewalls of the slider 51 are horizontally provided with first guide grooves 71 extending in the front-back direction; there can be one or more first guide grooves 71. The sidewalls of the slide grooves 11 are horizontally provided with second guide grooves 72 corresponding to the sides of the first guide grooves 71, and ball bearings 73 are engaged within the first and second guide grooves 71 and 72. Using the above structure, the ball bearings 73 cooperate with the first and second guide grooves 71 and 72 to form a linear guide rail structure, locking the friction head 5 onto the mounting bracket 1 and guiding the translation of the friction head 5, further improving the stability of the friction head 5 during movement.

[0025] In this embodiment, the lower end of the adapter 4 is provided with a connecting groove 42, and the upper end of the slider 51 is provided with a connecting boss 511, which is embedded in the connecting groove 42. The bottom of the drive groove 41 is provided with a countersunk hole 43 communicating with the connecting groove 42, and the connecting boss 511 is provided with a threaded hole 512 communicating with the countersunk hole 43. By inserting a screw into the countersunk hole 43 and threading the lower end of the screw into the threaded hole 512, the adapter 4 and the connecting boss 511 are fixedly connected together. The structure is simple and the disassembly and assembly are more convenient.

[0026] In this embodiment, the mounting frame 1 includes an upper frame 12 and a lower frame 13 fixedly connected vertically, with the motor 2 fixedly mounted inside the upper frame 12. The lower frame 13 has mounting holes, and several second bearings 62 are provided within these holes. The second bearings 62 are sleeved on the drive shaft 3, further improving the smoothness of the drive shaft 3's rotation. Furthermore, a cutter 8 is fixedly connected to the lower end of the lower frame 13, which can cut the cable ties when the mounting frame 1 approaches them.

[0027] The working principle of this utility model is as follows: When welding cable ties, the lifting drive mechanism drives the mounting frame 1 to approach the cable ties, and the cutter 8 cuts the cable ties. Then, the motor 2 drives the drive shaft 3 to rotate. When the drive shaft 3 rotates, it drives the first bearing 61 to swing within the drive groove 41 through the eccentric frustum 31. When the first bearing 61 swings, it comes into contact with the drive part 411 in the drive groove 41, thereby driving the friction pressure head 5 to move back and forth repeatedly at the lower end of the mounting frame 1 to weld the cable ties.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-stability packing machine welding assembly, characterized in that, It includes a mounting bracket, a motor, a drive shaft, and a friction head. The motor is fixedly connected to the upper end of the mounting bracket, the upper end of the drive shaft is connected to the output shaft of the motor, and the friction head is slidably connected to the lower end of the mounting bracket. The upper end of the friction head is provided with a drive groove, and the lower end of the drive shaft is provided with an eccentric frustum. The eccentric frustum is located in the drive groove, and the eccentric frustum and the drive groove are in rolling friction engagement.

2. The high-stability packing machine welding assembly according to claim 1, characterized in that, The upper end of the friction head is equipped with a fixedly connected adapter, and the drive groove is located at the upper end of the adapter.

3. The high-stability packing machine welding assembly according to claim 2, characterized in that, A first bearing is fitted on an eccentric circular platform. The drive groove includes a drive part and clearance parts on both sides of the drive part. The drive part and the first bearing cooperate with each other, and the clearance parts provide clearance when the first bearing swings.

4. The high-stability packing machine welding assembly according to claim 3, characterized in that, The upper end of the friction head is provided with a slider, and the lower end of the mounting bracket is provided with a sliding groove that slides with the slider. The two side walls of the slider are provided with a first guide groove, and the side wall of the groove is provided with a second guide groove corresponding to the side of the first guide groove. Ball bearings are provided in the first guide groove and the second guide groove.

5. The high-stability packing machine welding assembly according to claim 4, characterized in that, The lower end of the adapter is provided with a connecting groove, and the upper end of the slider is provided with a connecting boss, which is embedded in the connecting groove for mating.

6. The high-stability packing machine welding assembly according to claim 5, characterized in that, The bottom of the drive groove is provided with a countersunk hole that communicates with the connecting groove, and the connecting boss is provided with a threaded hole that communicates with the countersunk hole.

7. The high-stability packing machine welding assembly according to claim 1, characterized in that, The mounting frame includes an upper frame and a lower frame connected vertically, and the motor is fixedly installed in the upper frame.

8. The high-stability packing machine welding assembly according to claim 7, characterized in that, The lower frame body is provided with mounting holes, and several second bearings are provided in the mounting holes. The second bearings are sleeved on the drive shaft.

9. A high-stability packing machine welding assembly according to claim 8, characterized in that, The lower end of the lower frame is equipped with a fixedly connected cutter.

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