Long-service-life axial limiting and pressurizing eccentric structure for welding machine

Abstract

A long-service-life axial limiting and pressurizing eccentric structure for a welding machine comprises a fixing mechanism, a driving mechanism and a transmission mechanism, the transmission mechanism comprises a rotating shaft and a sleeve, the sleeve is fixedly installed on the rotating shaft, the driving mechanism comprises a driving arm, the driving arm is fixedly connected with the rotating shaft, and the rotating shaft is fixedly connected with the driving arm. The transmission mechanism is rotatably arranged on the fixing mechanism, one end of the sleeve abuts against the driving arm, the other end of the sleeve abuts against one side face of the fixing mechanism, the structure is simple, safety and reliability are achieved, and the service life is long.

Description

Technical Field

[0001] The utility model relates to the technical field of high-frequency welding machines, and particularly relates to a high-life axial limiting and pressure-boosting eccentric structure for a welding machine. Background Art

[0002] With the continuous development of social economy, high-frequency welding machines have emerged as the times require. High-frequency welding machines usually include a working platform, a welding head assembly, a cylinder, and a pressure-boosting eccentric mechanism. A key link among them is the pressure-boosting eccentric structure. This pressure-boosting structure includes a lever linkage mechanism and a pressure-boosting drive mechanism, and drives the welding head to approach the raw material to be processed before welding through these mechanisms, thereby increasing the pressing force of the welding head on the raw material to be processed and improving the working stability.

[0003] For example, in the patent document with the patent application number CN202321170881.2 and the publication date of December 5, 2023, a concave-convex wheel installation device for a high-frequency plastic welding machine is disclosed, belonging to the technical field of high-frequency welding machines. It includes: a quick pressure-boosting seat, and the quick pressure-boosting seat includes two driving cylinders, two brackets, two eccentric shaft cores, two eccentric push rods, and two shaft core connecting rods; a linear head, and the linear head includes a profile mechanism and two substrates. The profile mechanism includes an octagonal profile, a screw rod, and a sliding seat. The two substrates are respectively movably abutted against the front and rear sides of the octagonal profile. The sliding seat is threadedly sleeved on the outer side of the screw rod, and the sliding seat is slidably connected inside the octagonal profile. This structure adopts an octagonal profile for the main shaft sliding, and will not swing left and right or back and forth during sliding, improving the sliding accuracy of the main shaft. Through the quick pressure-boosting seat, the force generated by the eccentric shaft cylinder is doubled by itself. The eccentric push rod and the central shaft core connecting rod are separated, and there will be no safety hazard no matter when the cylinder acts.

[0004] In the prior art such as the above-mentioned document, a driving motor is connected to a swing arm, and then the swing arm is connected to a rotating shaft. Then, the driving motor drives the swing arm to rotate to make the rotating shaft rotate. In order to ensure the stability of the connection between the rotating shaft and the swing arm and limit the axial movement of the rotating shaft on the bracket, generally, an annular groove needs to be provided on the rotating shaft to achieve clamping. However, in this implementation method, due to the large driving force generated by the driving motor acting on the rotating shaft, the annular groove makes the rotating shaft prone to fracture, resulting in low driving reliability and easy reduction of the equipment operation efficiency. Content of the Utility Model

[0005] The utility model provides a high-life axial limiting and pressure-boosting eccentric structure for a welding machine, which has a simple structure, is safe and reliable, and has a long service life.

[0006] To achieve the above-mentioned purpose, the technical solution of the utility model is: a long-life axial limit boost eccentric structure for a welding machine, comprising a fixing mechanism, a driving mechanism and a transmission mechanism, the transmission mechanism comprising a rotating shaft and a sleeve, the sleeve being sleeved on the rotating shaft, the driving mechanism comprising a driving arm, the driving arm being fixedly connected to the rotating shaft, the transmission mechanism being rotatably arranged on the fixing mechanism, one end of the sleeve being abutted against the driving arm, and the other end of the sleeve being abutted against a side surface of the fixing mechanism.

[0007] The above arrangement, since a sleeve is provided on the rotating shaft, and the sleeve is respectively abutted against the driving arm and the fixing mechanism, the position of the rotating shaft between the driving arm and the fixing mechanism can be limited, and there is no need to groove, drill or cut threads on the rotating shaft, so the fatigue strength of the rotating shaft is not affected, the torque is effectively transmitted, and the energy loss in the transmission process is reduced, thereby ensuring the long-term stable operation of the transmission system. At the same time, since the fixed connection method between the rotating shaft, the sleeve and the driving arm is relatively simple, after long-term use, if the sleeve is worn by force, only the sleeve needs to be replaced, and the detection and replacement of parts are also more convenient, shortening the time for replacement of parts due to maintenance.

[0008] Furthermore, the fixing mechanism includes a fixing plate, the rotating shaft passes through the fixing plate and out of the sleeve, a cutting edge is provided on one side of the rotating shaft passing through the sleeve, the cutting edge is fixedly connected to the driving arm, one side of the sleeve abuts against the fixing plate, and the other side of the sleeve abuts against the driving arm.

[0009] In the above arrangement, one side of the sleeve abuts against the fixed plate, and the other side of the sleeve abuts against the driving arm. This design can effectively stabilize the rotating shaft. Through physical contact, the sleeve can provide support in the axial direction, thereby reducing displacement caused by axial force or vibration, and ensuring the motion trajectory between the rotating shaft and the driving arm. The cutting edge design makes the connection between the rotating shaft and the driving arm easier. Through cutting edges, the driving arm can be quickly and accurately installed on the rotating shaft, thereby improving assembly efficiency.

[0010] Furthermore, the number of the cutting edges is two, and the cutting edges are relatively arranged along the circumferential direction of the rotating shaft. The rotating shaft is provided with a connecting hole at one end of the cutting edge, and the connecting hole is arranged along the axial direction of the rotating shaft. The rotating shaft and the driving arm are fixedly connected to the connecting hole through fasteners.

[0011] The above arrangement, through the connection holes and fasteners on the rotating shaft, helps to achieve axial fixation between the rotating shaft and the driving arm, and realize uniform transmission of torque. The cutting edges are only set at two edges relatively in the circumferential direction of the rotating shaft, and there is no need to set multiple edges to achieve installation and fixation, thereby improving the impact resistance of the rotating shaft during rotation and ensuring stable operation under various complex conditions.

[0012] Further, the fixed plate is provided with an eccentric bearing seat, and the transmission mechanism further includes an eccentric bearing. The eccentric bearing is fixedly installed on the eccentric bearing seat. The eccentric bearing is provided with a mounting hole, and the axis of the mounting hole does not coincide with the axis of the eccentric bearing.

[0013] With the above settings, the eccentric bearing seat helps to distribute the load more evenly, thereby improving the service life and reliability of the bearing. The design of the eccentric bearing can disperse and absorb the impact force to a certain extent, and allows the position of the rotating shaft to be finely adjusted by rotating the eccentric bearing. This adjustment method can achieve high-precision position adjustment, ensure the precise alignment between the rotating shaft and components such as the driving arm and the sleeve, thereby protecting other parts from damage.

[0014] Further, the fixed plate includes a first fixed plate and a second fixed plate, which are arranged opposite to each other. The transmission mechanism further includes a rotating arm. One end of the rotating shaft passes through the mounting hole of the first fixed plate and is fixedly connected to the rotating arm. The other end of the rotating shaft is connected to the mounting hole of the second fixed plate. The rotating shaft is fitted in the mounting hole and rotates with the eccentric bearing.

[0015] With the above settings, through the mounting holes of the first fixed plate and the second fixed plate, the precise alignment between the rotating shaft and the transmission arm can be ensured, making the connection between the rotating shaft and the transmission arm more reliable, helping to reduce wear, extend the service life of the components, helping to reduce maintenance costs, and ensuring the long-term stable operation of the system.

[0016] Further, the fixing mechanism further includes a positioning shaft and a pin. The first fixed plate is provided with a first fixed plate positioning hole, and the second fixed plate is provided with a second fixed plate positioning hole. Both ends of the positioning shaft pass through the first fixed plate positioning hole and the second fixed plate positioning hole. Both ends of the positioning shaft are provided with pin holes, and the pin is inserted into the pin holes.

[0017] With the above settings, through the design of the positioning shaft and the pin, the precise alignment between the first fixed plate and the second fixed plate can be ensured. The positioning shaft passes through the positioning holes of the two fixed plates, ensuring the accurate relative position of the fixed plates. By inserting the pin into the pin holes, the reliability of the connection of the fixed plates can be improved, effectively preventing the accidental movement of the fixed plates during operation, and reducing the risk of failure caused by accidental displacement.

[0018] Further, the fixing mechanism further includes a support shaft. One side of the support shaft abuts against the first fixed plate, and the other side of the support shaft abuts against the second fixed plate.

[0019] With the above settings, the support column abuts against the fixed plate, providing an axial force and playing a supporting role between the fixed plates, effectively preventing the fixed plates from deforming inward due to external extrusion, and improving the reliability of the connection of the fixed plates.

[0020] Furthermore, the driving mechanism further includes a driving cylinder, and the driving cylinder is fixedly connected to the driving arm.

[0021] With the above arrangement, the fixed connection can reduce the delay in mechanical transmission, enabling the driving cylinder to control the driving arm more quickly, thereby improving the response speed of the driving arm to the driving cylinder and enhancing stability.

[0022] Furthermore, the driving arm is provided with trimming mounting holes, and the trimming mounting holes are arranged to match the trimming.

[0023] With the above arrangement, the precise fit between the trimming mounting holes and the trimming can ensure that the mechanical components maintain the correct position during movement, reduce the friction between the trimming mounting holes and the trimming, extend the service life, and ensure the system stability.

[0024] Furthermore, a through hole is arranged inside the sleeve, and the diameter of the outer side wall of the rotating shaft is less than or equal to the inner diameter of the through hole.

[0025] With the above arrangement, the rotating shaft can be more reliably sleeved inside the sleeve, enabling the sleeve to protect the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is an overall schematic diagram of a high-life axial limit pressurizing eccentric structure for a fusion splicer according to the present invention

[0027] Overall view.

[0028] Figure 2 is an overall schematic diagram of a high-life axial limit pressurizing eccentric structure for a fusion splicer according to the present invention

[0029] Enlarged view at A.

[0030] Figure 3 is an overall schematic diagram of a high-life axial limit pressurizing eccentric structure for a fusion splicer according to the present invention

[0031] Partial explosion view.

[0032] Figure 4 is an overall schematic diagram of a high-life axial limit pressurizing eccentric structure for a fusion splicer according to the present invention

[0033] Enlarged view at B.

[0034] Figure 5 is a side view of the driving arm in the present invention.

[0035] Figure 6 is an overall schematic diagram of the rotating shaft in the present invention.

[0036] Figure 7 is a bottom view of a high-life axial limit pressurizing eccentric structure for a fusion splicer according to the present invention.

[0037] Description of the reference numerals in the drawings:

[0038] 1—Fixed plate; 101—First fixed plate; 102—Second fixed plate; 2—Driving cylinder; 3—Sleeve; 4—Driving arm; 41—Trimming mounting hole; 5—Rotating shaft; 501—Trimming edge; 502—Connecting hole; 6—Eccentric bearing; 601—Mounting hole; 7—Rotating arm; 8—Positioning shaft; 801—Pin hole; 9—Positioning hole; 10—Eccentric bearing seat; 11—Pin; 12—Support shaft. Detailed implementation manners

[0039] The following further describes the present utility model in detail with reference to the drawings and specific implementation manners.

[0040] As Figures 1-7 shown, a high-life axial limit and pressurizing eccentric structure for a fusion splicer includes a fixing mechanism, a driving mechanism, and a transmission mechanism. The transmission mechanism includes a rotating shaft 5 and a sleeve 3. The sleeve 3 is sleeved and installed on the rotating shaft 5. The driving mechanism includes a driving arm 4. The driving arm 4 is fixedly connected to the rotating shaft 5. The driving mechanism is fixedly connected to the transmission mechanism. The transmission mechanism is rotatably arranged on the fixing mechanism. One side of the sleeve 3 abuts against the side surface of the driving mechanism, and the other side of the sleeve 3 abuts against one side surface of the fixing mechanism. Since the two side surfaces of the sleeve 3 respectively abut against the side surface of the swing arm and the side surface of the fixing mechanism, axial limitation of the rotating shaft can be achieved, and at the same time, there is no need to groove, drill, or cut threads on the rotating shaft. Therefore, the fatigue strength of the rotating shaft will not be affected, the torque can be effectively transmitted, and the energy loss during the transmission process can be reduced, thereby ensuring the long-term stable operation of the transmission system. Since the fixed connection method among the rotating shaft 5, the sleeve 3, and the driving arm 4 is relatively simple, it is more convenient to detect and replace components, and the time for overhauling and replacing parts is shortened.

[0041] As Figure 3 and Figure 4 shown, the fixing mechanism includes a fixed plate 1. The fixing mechanism is used to be fixed on the frame of the fusion splicer. The fixed plate 1 includes a first fixed plate 101 and a second fixed plate 102. The fixed plate 1 is provided with an eccentric bearing seat 10. The transmission mechanism further includes an eccentric bearing 6. The eccentric bearing 6 is fixedly installed on the eccentric bearing seat 10. The eccentric bearing 60 is provided with a mounting hole 601. The axis of the mounting hole 601 does not coincide with the axis of the eccentric bearing 6. The eccentric bearing 6 is fixedly connected to the eccentric bearing seat 10. The rotating shaft 5 is fixedly connected to the rotating arm 7. The sleeve 3 is sleeved on the rotating shaft 5. The rotating shaft 5 is fixedly connected to the driving arm 4. The rotating arm 7 is externally connected to a lever connecting device. The pressing down of the pressing member is realized through the lever connecting device. The structure of the lever connecting device is prior art. For example, it is disclosed in the patent document with Chinese patent application number 202223533485.X and publication date of September 8, 2323, and will not be elaborated here.

[0042] Six eccentric bearings contribute to a more uniform load distribution, thereby increasing the service life and reliability of the bearings. The design of the eccentric bearing 6 can disperse and absorb impact forces to a certain extent.

[0043] As Figure 3 shown, the fixing plate 1 is provided with a positioning hole 9. A positioning shaft 8 is arranged in the positioning hole 9. One end of the positioning shaft 8 passes through the positioning hole 9 on the first fixing plate 101 and extends out. The other end of the positioning shaft 8 extends out of the positioning hole 9 on the second fixing plate 102 and extends out. Pin holes 801 are arranged at both ends of the positioning shaft 8. A long strip-shaped pin 11 is inserted into the pin holes 801. After the long strip-shaped pin 11 is inserted, the other end of the long strip-shaped pin 11 is bent so as to more reliably limit the long strip-shaped pin 11, which can ensure the precise alignment of the first fixing plate 101 and the second fixing plate 102. The positioning shaft 8 passes through the positioning holes 9 of the two fixing plates 1, ensuring the accurate relative position of the fixing plate 1. By inserting the pin 11 into the pin holes 801, the axial movement between the two fixing plates 1 is restricted, providing axial tensile force to ensure that the fixing plate 1 does not displace during the operation of the equipment, which can improve the reliability of the connection of the fixing plate 1, effectively prevent accidental movement of the fixing plate 1 during operation, and reduce the risk of failure caused by accidental displacement.

[0044] As Figures 1-3 shown, the transmission mechanism includes a rotating shaft 5 and a rotating arm 7. One end of the rotating shaft 5 passes through the mounting hole 601 of the first fixing plate 101 and is fixedly connected to the rotating arm 7. The other end of the rotating shaft 5 is connected to the mounting hole 601 of the second fixing plate 102. The rotating shaft 5 is fitted in the mounting hole 601 and rotates with the eccentric bearing 6. Through the mounting holes 601 of the first fixing plate 101 and the second fixing plate 102, the precise alignment of the rotating shaft 5 and the rotating arm 7 can be ensured. The stable connection of the rotating shaft and the rotating arm 7 helps to reduce wear, extend the service life of the components, helps to reduce the maintenance cost, and ensures the long-term stable operation of the system.

[0045] The rotating shaft 5 passes through the fixed plate 1 and penetrates out of the sleeve 3. On one side of the sleeve 3 where the rotating shaft 5 penetrates out, there are two cutting edges 501 which are arranged oppositely. On the driving arm 4, there is a cutting-edge mounting hole 41, and on the cutting-edge mounting hole 41, there is a cutting surface corresponding to the cutting edge. One end of the sleeve 3 with the cutting edge 501 passes through the cutting-edge mounting hole 41 and is fixedly connected to the driving arm 4. One side of the sleeve 3 abuts against the fixed plate 1, and the other side of the sleeve 3 abuts against the driving arm 4. This design can effectively stabilize the rotating shaft 5. There is a through hole inside the sleeve 3, and the diameter of the outer sidewall of the rotating shaft 5 is less than or equal to the diameter of the inner sidewall of the through hole, so that the rotating shaft 5 can be stably installed in the sleeve 3. Through physical contact, the sleeve 3 can provide support in the axial direction, thereby reducing displacement caused by axial force or vibration, and ensuring the movement trajectory between the rotating shaft 5 and the driving arm 4. The design of the cutting edge 501 makes the connection between the rotating shaft 5 and the driving arm 4 more convenient. Through the cutting edge 501, the driving arm 4 can be quickly and accurately installed on the rotating shaft 5, thus improving the assembly efficiency.

[0046] As Figure 6 shown, the cutting edges of the rotating shaft 5 are arranged on both sides in the circumferential direction of the rotating shaft 5. One end of the rotating shaft 5 with the cutting edge 501 is provided with a connecting hole 502 which is arranged along the axial direction of the rotating shaft. This helps to achieve circumferential fixation between the rotating shaft 5 and the driving arm 4 through fasteners such as mounting screws, and realize uniform torque transmission. The cutting edge 501 is only arranged on both sides in the circumferential direction of the rotating shaft 5, which improves the anti-impact ability of the rotating shaft 5 during rotation, prevents the problem of low connection strength at one end of the rotating shaft 5 caused by excessive setting of the cutting edge 501, and ensures stable operation under various complex conditions. Parts on the rotating shaft 5 can be fixed by screwing screws into the through hole 502 to prevent axial displacement. Through the cooperation between the positioning shaft 8 and the support shaft 12, the internal space between the fixed plates 1 is ensured, and the parts between the fixed plates 1 are protected from damage.

[0047] As Figure 7 shown, there is a support shaft 12 between the two fixed plates 1 below. One side of the support shaft 12 abuts against the first fixed plate 101, and the other side of the support shaft 12 abuts against the second fixed plate 102. The support shaft 12 can provide axial force in the axial direction, so that the fixed plate 1 will not be indented inward due to external force.

[0048] Working principle of the utility model: One end of the rotating shaft passes through the mounting hole 601 of the first fixing plate 101 and is fixedly connected to the rotating arm 7. The other end of the rotating shaft 5 extends out of the rotating arm 7 and is connected to the mounting hole 601 of the second fixing plate 102. The rotating arm 7 rotates and drives the upper and lower pressing parts of the fusion splicer to move downward or upward. The rotating shaft 5 is fitted in the mounting hole 601 and rotates with the eccentric bearing 6. One side of the rotating shaft 5 extending out of the mounting hole 601 of the second fixing plate 102 is connected to the sleeve 3. A cutting edge 501 is provided on one side of the rotating shaft 5 passing through the sleeve 3. The cutting edge 501 is connected to the cutting edge mounting hole 41 on the driving arm 4. One side of the sleeve 3 abuts against the fixing plate 1, and the other side of the sleeve 3 abuts against the driving arm 4. A through hole 502 is provided on one side of the rotating shaft 5 passing through the sleeve 3. A fixing screw is added to the through hole 502 to ensure that there is no axial displacement between the rotating shaft 5, the sleeve 3 and the driving arm 4. When the driving cylinder 2 drives the driving arm 4 to operate, the driving arm 4 serves as a connection bridge between the driving cylinder 2 and the rotating shaft 5 and is responsible for converting the linear motion of the driving cylinder 2 into the rotational motion of the rotating shaft 5. The rotating shaft 5 rotates to drive the rotating arm 7 to move, thereby realizing mechanical transmission.

Claims

1. A long-life axial limit pressure boosting eccentric structure for a welding machine, comprising a fixing mechanism, a driving mechanism and a transmission mechanism, characterized in that: The transmission mechanism comprises a rotating shaft and a sleeve, wherein the sleeve is fixedly mounted on the rotating shaft; the driving mechanism comprises a driving arm, wherein the driving arm is fixedly connected to the rotating shaft; the driving mechanism is fixedly connected to the transmission mechanism, and the transmission mechanism is rotatably arranged on the fixing mechanism.

2. According to claim 1, a long-life axial limit pressurized eccentric structure for a welding machine is characterized in that: The rotating shaft passes through the fixed plate and out of the sleeve. A cutting edge is provided on one side of the rotating shaft passing through the sleeve. The cutting edge is fixedly connected to the driving arm. One side of the sleeve abuts against the fixed plate, and the other side of the sleeve abuts against the driving arm.

3. According to claim 2, a long-life axial limit pressure-boosting eccentric structure for a welding machine is characterized by: The cut edges are arranged along both sides of the rotating shaft in the circumferential direction, and a through hole is arranged along the circumferential straight direction on one side of the cut edge of the rotating shaft.

4. According to claim 1, a long-life axial limit pressure-boosting eccentric structure for a welding machine is characterized by: The fixing mechanism includes a fixing plate, the fixing plate includes a first fixing plate and a second fixing plate, the fixing plate is provided with an eccentric bearing seat, the transmission mechanism also includes an eccentric bearing, the eccentric bearing is fixedly mounted on the eccentric bearing seat, the eccentric bearing is provided with a mounting hole, and the axis center of the mounting hole does not coincide with the axis center of the eccentric bearing.

5. According to claim 4, a long-life axial limit pressure-boosting eccentric structure for a welding machine is characterized in that: The transmission mechanism also includes a rotating arm, a rotating shaft penetrates through the first fixed plate mounting hole and is fixedly connected to the rotating arm, and the rotating shaft extends from the rotating arm and is connected to the second fixed plate mounting hole. The rotating shaft is adapted in the mounting hole and rotates with the eccentric bearing.

6. The long-life axial limit pressure-boosting eccentric structure for a welding machine according to claim 2, characterized in that: The fixing mechanism also includes: a positioning shaft and a latch pin. The fixing plate is provided with a positioning hole. The positioning shaft passes through the first fixing plate positioning hole and extends out of the second fixing plate positioning hole. Pin holes are provided at both ends of the positioning shaft. The latch pin is inserted into the pin holes.

7. The long-life axial limit pressure-boosting eccentric structure for a welding machine according to claim 1 is characterized in that: The fixing mechanism further comprises a supporting shaft, one side of the supporting shaft abuts against the first fixing plate, and the other side of the supporting shaft abuts against the second fixing plate.

8. The long-life axial limit pressurized eccentric structure for welding machine according to claim 1 is characterized in that: The driving mechanism also includes a driving cylinder, and the driving cylinder is fixedly connected to the driving arm.

9. The long-life axial limit pressurized eccentric structure for welding machine according to claim 2 is characterized in that: The driving arm is provided with a trimming installation hole, and the trimming installation hole is matched with the trimming.

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