Flexible stop mechanism for aluminum alloy frame rod material conveying

The flexible stop mechanism solves the problem of damage caused by the hard contact of the baffle during the conveying of aluminum alloy frame rods, and realizes damage-free and stable conveying.

CN222307149UActive Publication Date: 2025-01-07ANHUI RUIKEMA INTELLIGENT EQUIPMENT CO LTD
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Patent Information

Application Number
CN202421169723.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-27
Publication Date
2025-01-07
Estimated Expiration
2034-05-27

AI Technical Summary

Technical Problem

In the prior art, during the conveying process of aluminum alloy frame rods, the baffles and the ends of the rods come into hard contact, causing damage to the ends.

Method used

A flexible stop mechanism is adopted, including a stop assembly and a guide block. The stop assembly fits against the inclined surface, and the guide block is equipped with a bearing to reduce friction. The flexible stop is achieved by driving the telescopic rod with a cylinder.

Benefits of technology

This effectively avoids damage to the end of the feed rod, reduces friction, and improves conveying stability.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a flexible backstop mechanism for aluminum alloy frame rod material conveying, which comprises a base, a punching machine is fixedly mounted at one end of the top of the base, punching grooves are symmetrically formed in the punching machine, a rod material body is placed in the two punching grooves, and the punching machine is used for punching the rod material body so as to enable two ends of the rod material body to form inclined planes. And a conveying mechanism is mounted on the base and located on one side of the punching machine, and the conveying mechanism is used for conveying the rod material body to one side of the punching machine. When the rod material body blocking device is used, in the conveying process of the rod material body and when the rod material body makes contact with the blocking assembly, the rod material body can be blocked through the blocking assembly, the blocking assembly is attached to the inclined face, and the situation that when the baffle blocks the rod material body and the end of the rod material body abuts against the baffle, the rod material body cannot be blocked is effectively avoided. The lowest end of the inclined opening in the end of the rod material body rigidly abuts against the baffle, the contact face between the rod material body and the rod material body is increased, and damage to the end of the rod material body is effectively avoided.
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Description

Technical Field

[0001] The utility model relates to the technical field of solar frame processing equipment, in particular to a flexible stop mechanism for conveying aluminum alloy frame rods. Background Art

[0002] Solar frame usually refers to the structure used to assemble solar panels. It is used to fix and protect solar panels from the external environment. During the processing of solar frame processing equipment, after the aluminum alloy frame material rod is cut according to size, it will be sent to the punching machine to punch the two ends of the material rod, so that the punching end of the material rod is beveled. After the material rod is punched, it is transferred to the conveying mechanism through the transfer mechanism, and the stamped material rod is conveyed to the next processing step for processing through the conveying mechanism.

[0003] At present, a baffle is fixedly installed on one end of the conveying mechanism away from the punching machine. When the conveying mechanism conveys the punched material rod, the baffle is used to block the material rod to achieve a limiting effect on the material rod, so as to facilitate the transfer of the material rod to the next processing step. Although the baffle can block the material rod, there are still the following defects in actual use:

[0004] When the conveying mechanism is conveying the punched material rod, when the baffle blocks the material rod, the end of the material rod collides with the baffle, so that the lowest end of the oblique mouth of the end of the material rod collides with the baffle, resulting in a small contact surface between the material rod and the baffle, which is easy to cause damage to the end of the material rod;

[0005] Therefore, the present application proposes a flexible stop mechanism for conveying aluminum alloy frame rods. Utility Model Content

[0006] In view of the deficiencies of the prior art, the utility model provides a flexible stop mechanism for conveying aluminum alloy frame rods, which solves the problems mentioned in the background technology.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A flexible stop mechanism for conveying aluminum alloy frame rods comprises a base, a punching machine is fixedly mounted on one end of the top of the base, punching grooves are symmetrically provided on the punching machine, rod bodies are placed in two of the punching grooves, the punching machine is used to punch the rod body so that two ends of the rod body form inclined surfaces, a conveying mechanism is installed on the base and on one side of the punching machine, and the conveying mechanism is used to convey the rod body to one side of the punching machine;

[0009] The conveying mechanism includes a conveying frame fixedly installed on the top of the base and located on one side of the punching machine, a plurality of rotating rods are rotatably installed on the top of the conveying frame in a horizontal linear array, a conveying roller is coaxially fixedly connected to one end of the rotating rod close to the punching machine, and a synchronous belt pulley is coaxially fixedly connected to the other end of the rotating rod, a plurality of rotating rods are rotatably installed on the bottom of the conveying frame in a horizontal linear array, a synchronous belt pulley is coaxially fixedly connected to the end of the rotating rod, a plurality of synchronous belt pulleys are connected to a plurality of synchronous belt pulleys by synchronous belt transmission, a servo motor is fixedly installed on the conveying frame for driving one of the rotating rods to rotate, and a material unloading mechanism is installed on the punching machine, and the material unloading mechanism is used to unload the rod material body onto the plurality of conveying rollers located on one side of the punching machine;

[0010] A mounting plate is fixedly installed on the base and at the end of the conveying frame away from the punching machine, and telescopic rods are symmetrically fixed on the mounting plate in a horizontal direction. The telescopic ends of the two telescopic rods extend to above the conveying roller close to the mounting plate, and fixed plates are fixed on the ends of the two telescopic rods. A cylinder connected to the fixed plate is fixedly installed on the mounting plate, and a stop assembly acting on the rod material body is installed on the fixed plate, which is used to stop the rod material body conveyed by the conveying mechanism, and the stop assembly can fit with the inclined surface.

[0011] Further: the stop assembly includes a stop block fixedly installed at the top position of a fixed plate away from the telescopic rod, a guide block fixedly installed at the bottom position, and there is a gap between the stop block and the guide block, and a stop surface is provided at the bottom position of the stop block away from the fixed plate. When the stop block contacts the rod material body, the stop surface fits with the inclined surface.

[0012] Furthermore: a mounting groove is provided on one side of the guide block away from the fixed plate, and a plurality of bearings are rotatably mounted on the guide block and in the mounting groove, and the top of the bearing and the top of the conveying roller are located on the same horizontal plane.

[0013] Furthermore: a bolt member is detachably mounted on the guide block and in the mounting groove, and the plurality of bearings are rotatably mounted on the bolt member.

[0014] Further: the feeding mechanism comprises:

[0015] The rotating shaft is rotatably installed on one side of the punching machine and is located below the two punching slots. Connecting rods are symmetrically fixed on the rotating shaft and on opposite sides of the two punching slots. A pneumatic clamp is fixedly installed on the free end of the connecting rod and on the side close to the punching machine. A servo motor for driving the rotating shaft to rotate is fixedly installed on the punching machine.

[0016] Further: a rotating rod 2 is rotatably installed on the conveying frame and between each adjacent two rotating rods, the rotating rod 2 is located below the rotating rod, and a guide wheel is coaxially fixedly connected to the rotating rod 2 near the bottom of the synchronous pulley 1, and the top of the synchronous belt is wound around the bottom of the guide wheel.

[0017] Furthermore: the pneumatic clamping jaws are symmetrically provided with clamping plates, and rubber plates are fixedly installed on the sides of the two clamping plates close to each other.

[0018] The utility model provides a flexible stop mechanism for conveying aluminum alloy frame rods. Compared with the prior art, it has the following beneficial effects:

[0019] 1. During use, when the rod body contacts the stopper assembly during the transportation of the rod body, the rod body can be blocked by the stopper assembly. The stopper assembly fits the inclined surface, effectively avoiding the situation that when the baffle plate blocks the rod body, the end of the rod body contacts the baffle plate, and the lowest end of the oblique mouth of the end of the rod body contacts the baffle plate rigidly, thereby increasing the contact surface between the rod body and the rod body, and effectively avoiding the situation that the end of the rod body is damaged;

[0020] 2. By setting up multiple bearings, during the transportation of the rod body, when the end of the rod body extends into the gap between the stop block and the guide block, the bottom surface of the rod body will contact the top of multiple bearings, so that during the displacement of the rod body, multiple bearings will rotate in the installation groove, thereby reducing the friction between the rod body and the guide block, thereby effectively avoiding the wear of the bottom surface of the rod body;

[0021] 3. By setting a guide wheel, the top of the synchronous belt is wound around the bottom of the guide wheel, and the second rotating rod is located between two adjacent rotating rods and below the rotating rods, thereby increasing the contact surface between the synchronous belt and the synchronous pulley, thereby improving the conveying stability of the conveying mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A three-dimensional structural schematic diagram of the utility model is shown;

[0024] Figure 2 The utility model is shown Figure 1 The enlarged view of point A in the middle;

[0025] Figure 3A schematic diagram of the installation structure of the guide wheel of the utility model is shown;

[0026] Figure 4 A schematic diagram of the installation structure of the stopper assembly of the utility model is shown;

[0027] Figure 5 The schematic diagram of the installation structure of the material feeding mechanism of the utility model is shown;

[0028] As shown in the figure: 1. base; 2. punching machine; 21. punching groove; 22. rod material body; 221. inclined surface; 3. conveying mechanism; 31. conveying frame; 32. rotating rod; 33. conveying roller; 34. synchronous pulley 1; 35. rotating rod 1; 36. synchronous pulley 2; 37. synchronous belt; 38. servo motor 2; 4. unloading mechanism; 41. rotating shaft; 42. connecting rod; 43. pneumatic clamp; 431. clamping plate; 432. rubber plate; 44. servo motor 1; 5. mounting plate; 51. telescopic rod; 52. fixing plate; 53. cylinder; 6. stop assembly; 61. stop block; 611. stop surface; 62. guide block; 621. mounting groove; 622. bearing; 623. bolt; 7. rotating rod 2; 71. guide wheel. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Embodiment 1

[0031] In order to solve the technical problems in the background technology, the following flexible stop mechanism for conveying aluminum alloy frame rods is provided:

[0032] Combination Figure 1-Figure 5As shown, the utility model provides a flexible stop mechanism for conveying aluminum alloy frame rods, including a base 1, a punching machine 2 is fixedly installed at one end of the top of the base 1, and the punching machine 2 is symmetrically provided with punching grooves 21, and a rod body 22 is placed in the two punching grooves 21. The punching machine 2 is used to punch the rod body 22 so that the two ends of the rod body 22 form inclined surfaces 221. A conveying mechanism 3 is installed on the base 1 and on one side of the punching machine 2. The conveying mechanism 3 is used to convey the rod body 22 to the side of the punching machine 2; the conveying mechanism 3 includes a conveying frame 31 fixedly installed on the top of the base 1 and on one side of the punching machine 2, and the top of the conveying frame 31 is water-resistant. A plurality of rotating rods 32 are installed in a horizontal linear array rotationally, and a conveying roller 33 is coaxially fixedly connected to one end of the rotating rod 32 close to the punching machine 2, and a synchronous belt pulley 34 is coaxially fixedly connected to the other end of the rotating rod 32. The bottom of the conveying frame 31 is installed with a plurality of rotating rods 35 in a horizontal linear array rotationally, and a synchronous belt pulley 36 is coaxially fixedly connected to the end of the rotating rod 35. The plurality of synchronous belt pulleys 34 and the plurality of synchronous belt pulleys 36 are connected through a synchronous belt 37. A servo motor 38 for driving one of the rotating rods 35 to rotate is fixedly installed on the conveying frame 31. A blanking mechanism 4 is installed on the punching machine 2, and the blanking mechanism 4 is used to blank the rod material body 22 to On the multiple conveying rollers 33 on one side of the punching machine 2, when in use, the rod material body 22 after punching in the two punching grooves 21 is unloaded to the conveying mechanism 3 through the unloading mechanism 4, so that the rod material body 22 is placed on the top of the multiple conveying rollers 33 on one side of the punching machine 2, and the servo motor 2 38 is controlled to work. The output shaft of the servo motor 2 38 rotates to drive the rotating rod 1 35 coaxially fixed thereto to rotate. Since the multiple synchronous pulleys 1 34 and the multiple synchronous pulleys 2 36 are connected through the synchronous belt 37, the multiple rotating rods 1 35 and the multiple rotating rods 32 are all rotated on the conveying frame 31. When the multiple rotating rods 32 rotate, the multiple conveying rollers 33 rotate synchronously, so that the multiple The material rod on the top of each conveying roller 33 is used to convey the material to achieve the conveying effect; a mounting plate 5 is fixedly installed on the base 1 and at the end of the conveying frame 31 away from the punching machine 2, and telescopic rods 51 are symmetrically fixed on the mounting plate 5 in a horizontal direction, and the telescopic ends of the two telescopic rods 51 extend to above the conveying roller 33 close to the mounting plate 5, and fixed plates 52 are fixed on the ends of the two telescopic rods 51, and a cylinder 53 connected to the fixed plate 52 is fixed on the mounting plate 5, and a stop assembly 6 acting on the rod material body 22 is installed on the fixed plate 52, which is used to stop the rod material body 22 conveyed by the conveying mechanism 3, and the stop assembly 6 can be in contact with the inclined surface 221.

[0033] When in use, after the punching machine 2 has punched both ends of the rod material body 22, the rod material body 22 is unloaded to a plurality of conveying rollers 33 located on one side of the punching machine 2 through the unloading mechanism 4, and the servo motor 2 38 is controlled to work to convey the rod material body 22 on the top of the plurality of conveying rollers 33 toward the mounting plate 5. During the conveying process of the rod material body 22, when the rod material body 22 contacts the stop assembly 6, the rod material body 22 can be blocked by the stop assembly 6, and the stop assembly 6 is in contact with the inclined surface 221, which effectively avoids the situation that when the baffle plate blocks the rod material body 22 and the end of the rod material body 22 contacts the baffle plate, the lowest end of the oblique mouth of the end of the rod material body 22 contacts the baffle plate, thereby increasing the contact surface between the rod material body 22 and the rod material body 22, and effectively avoiding the situation that the end of the rod material body 22 is damaged.

[0034] Embodiment 2

[0035] like Figure 1-Figure 5 As shown, based on the above embodiment, this embodiment further provides the following contents:

[0036] In this embodiment, the stop assembly 6 includes a stop block 61 fixedly installed at the top position of the fixed plate 52 away from the telescopic rod 51, and a guide block 62 fixedly installed at the bottom position, and there is a gap between the stop block 61 and the guide block 62. A stop surface 611 is provided at the bottom position of the stop block 61 away from the fixed plate 52. When the stop block 61 contacts the rod material body 22, the stop surface 611 fits with the inclined surface 221. When in use, during the transportation of the rod material body 22, when the rod material body 22 is displaced, the end of the rod material body 22 extends into the gap between the stop block 61 and the guide block 62. When the stop surface 611 fits with the inclined surface 221, the stop block 61 can achieve the effect of stopping the rod material body 22.

[0037] In this embodiment, a mounting groove 621 is provided on the side of the guide block 62 away from the fixed plate 52, and a plurality of bearings 622 are rotatably mounted on the guide block 62 and located in the mounting groove 621. The top of the bearing 622 is located on the same horizontal plane as the top of the conveying roller 33. By providing a plurality of bearings 622, during the conveying process of the rod material body 22, when the end of the rod material body 22 extends into the gap between the stop block 61 and the guide block 62, the bottom surface of the rod material body 22 will contact the top of the plurality of bearings 622, so that during the displacement of the rod material body 22, the plurality of bearings 622 all rotate in the mounting groove 621, thereby reducing the friction between the rod material body 22 and the guide block 62, thereby effectively avoiding the wear of the bottom surface of the rod material body 22.

[0038] In this embodiment, a bolt member 623 is detachably installed on the guide block 62 and in the installation groove 621, and the multiple bearings 622 are rotatably installed on the bolt member 623. By arranging multiple bearings 622 to be rotatably installed on the bolt member 623, when in use, the bolt member 623 is disassembled, thereby realizing the disassembly of multiple bearings 622, which facilitates the disassembly and replacement of the bearings 622.

[0039] Embodiment 3

[0040] like Figure 1-Figure 5 As shown, based on the above embodiment, this embodiment further provides the following contents:

[0041] In this embodiment, the unloading mechanism 4 includes: a rotating shaft 41, which is rotatably installed on one side of the punching machine 2 and is located below the two punching slots 21, a connecting rod 42 is symmetrically fixed on the rotating shaft 41 and located on the opposite sides of the two punching slots 21, a pneumatic clamp 43 is fixedly installed on the free end of the connecting rod 42 and on the side close to the punching machine 2, and a servo motor 1 44 for driving the rotating shaft 41 to rotate is fixedly installed on the punching machine 2. The models of the servo motor 1 44 and the servo motor 2 38 are both SM0601JSL-KCY-NNV. Specifically, when the two connecting rods 42 rotate around the rotating shaft 41 in a vertical state, the two pneumatic clamps 2 43 are located on the opposite sides of the two punching slots 21, and the two pneumatic clamps 2 43 are located on the same horizontal plane as the two punching slots 21. When the two connecting rods 42 rotate around When the shaft 41 rotates horizontally, the two pneumatic clamps 43 and the multiple conveying rollers 33 are located on the same horizontal plane. When the stamped rod material body 22 is unloaded, the servo motor 44 is controlled to work to rotate the rotating shaft 41 on the punching machine 2, so that the connecting rod 42 rotates vertically around the rotating shaft 41. The two pneumatic clamps 43 are located on the opposite sides of the two punching grooves 21, and the two pneumatic clamps 43 and the two punching grooves 21 are located on the same horizontal plane. The rod material body 22 can be clamped and fixed by the two pneumatic clamps 43. At this time, the servo motor 44 is controlled to work to rotate the rotating shaft 41 on the punching machine 2, so that the connecting rod 42 rotates horizontally around the rotating shaft 41, and the stamped rod material body 22 can be unloaded to the top of the multiple conveying rollers 33, thereby achieving the unloading effect of the stamped rod material body 22.

[0042] In this embodiment, a rotating rod 2 7 is rotatably installed on the conveying frame 31 and between each adjacent two rotating rods 32. The rotating rod 2 7 is located below the rotating rod 32. A guide wheel 71 is coaxially fixed to the rotating rod 2 7 below the synchronous pulley 1 34. The top of the synchronous belt 37 is wound around the bottom of the guide wheel 71. By setting the guide wheel 71, the top of the synchronous belt 37 is wound around the bottom of the guide wheel 71, and the rotating rod 2 7 is located between the adjacent two rotating rods 32 and below the rotating rod 32, thereby increasing the contact surface between the synchronous belt 37 and the synchronous pulley 1 34, thereby improving the conveying stability of the conveying mechanism 3.

[0043] In this embodiment, the pneumatic clamping jaws 43 are symmetrically provided with clamping plates 431, and rubber plates 432 are fixedly installed on the sides where the two clamping plates 431 are close to each other. By providing the rubber plates 432, when the pneumatic clamping jaws 43 clamp the rod material body 22, the rubber plates 432 on the pneumatic clamping jaws 43 contact with the rod material body 22, thereby increasing the friction between the pneumatic clamping jaws 43 and the rod material body 22, thereby improving the clamping stability of the rod material body 22.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flexible stop mechanism for conveying aluminum alloy frame rods, characterized by: It comprises a base, a punching machine is fixedly installed at one end of the top of the base, the punching machine is symmetrically provided with punching grooves, a rod material body is placed in two of the punching grooves, the punching machine is used to punch the rod material body so that the two ends of the rod material body form inclined surfaces, and a conveying mechanism is installed on the base and on one side of the punching machine, and the conveying mechanism is used to convey the rod material body to one side of the punching machine; The conveying mechanism includes a conveying frame fixedly installed on the top of the base and located on one side of the punching machine, a plurality of rotating rods are rotatably installed on the top of the conveying frame in a horizontal linear array, a conveying roller is coaxially fixedly connected to one end of the rotating rod close to the punching machine, and a synchronous belt pulley is coaxially fixedly connected to the other end of the rotating rod, a plurality of rotating rods are rotatably installed on the bottom of the conveying frame in a horizontal linear array, a synchronous belt pulley is coaxially fixedly connected to the end of the rotating rod, a plurality of synchronous belt pulleys are connected to a plurality of synchronous belt pulleys by synchronous belt transmission, a servo motor is fixedly installed on the conveying frame for driving one of the rotating rods to rotate, and a material unloading mechanism is installed on the punching machine, and the material unloading mechanism is used to unload the rod material body onto the plurality of conveying rollers located on one side of the punching machine; A mounting plate is fixedly installed on the base and at the end of the conveying frame away from the punching machine, and telescopic rods are symmetrically fixed on the mounting plate in a horizontal direction. The telescopic ends of the two telescopic rods extend to above the conveying roller close to the mounting plate, and fixed plates are fixed on the ends of the two telescopic rods. A cylinder connected to the fixed plate is fixedly installed on the mounting plate, and a stop assembly acting on the rod material body is installed on the fixed plate, which is used to stop the rod material body conveyed by the conveying mechanism, and the stop assembly can fit with the inclined surface.

2. The flexible stop mechanism for conveying aluminum alloy frame rods according to claim 1 is characterized in that: The stop assembly includes a stop block fixedly installed at the top position of a fixed plate away from the telescopic rod, and a guide block fixedly installed at the bottom position, and there is a gap between the stop block and the guide block. A stop surface is provided at the bottom position of the stop block away from the fixed plate. When the stop block contacts the rod material body, the stop surface fits with the inclined surface.

3. The flexible stop mechanism for conveying aluminum alloy frame rods according to claim 2 is characterized in that: A mounting groove is provided on one side of the guide block away from the fixed plate. A plurality of bearings are rotatably mounted on the guide block and in the mounting groove. The top of the bearing and the top of the conveying roller are located on the same horizontal plane.

4. The flexible stop mechanism for conveying aluminum alloy frame rods according to claim 3 is characterized in that: A bolt member is detachably mounted on the guide block and in the mounting groove, and a plurality of bearings are rotatably mounted on the bolt member.

5. The flexible stop mechanism for conveying aluminum alloy frame rods according to claim 1 is characterized in that: The unloading mechanism comprises: The rotating shaft is rotatably installed on one side of the punching machine and is located below the two punching slots. Connecting rods are symmetrically fixed on the rotating shaft and on opposite sides of the two punching slots. A pneumatic clamp is fixedly installed on the free end of the connecting rod and on the side close to the punching machine. A servo motor for driving the rotating shaft to rotate is fixedly installed on the punching machine.

6. The flexible stop mechanism for conveying aluminum alloy frame rods according to claim 1 is characterized in that: A second rotating rod is rotatably installed on the conveying frame and between each adjacent two rotating rods. The second rotating rod is located below the rotating rod. A guide wheel is coaxially fixedly connected to the second rotating rod near the bottom of the synchronous belt pulley one, and the top of the synchronous belt is wound around the bottom of the guide wheel.

7. The flexible stop mechanism for conveying aluminum alloy frame rods according to claim 5 is characterized in that: The pneumatic clamping jaws are symmetrically provided with clamping plates, and rubber plates are fixedly installed on the sides of the two clamping plates close to each other.