Device capable of adjusting various coil widths of uncoiling and blanking die

Abstract

The utility model discloses a device capable of adjusting various coil widths of an uncoiling and blanking die, which relates to the technical field of production of uncoiling and blanking dies of cold punching dies, and comprises a ball carrying device, a material guide roller component, a material guide plate and a Y nozzle, the roll material slides along the ball carrying device and is continuously conveyed through the material guide plate, the two sides of the roll material are in sliding contact with the material guide roller assembly, and the moving track is limited through the Y-nozzles. The rail assemblies are distributed and installed in the length direction of the bottom plate. The moving assembly is partially and movably connected to the track assembly. The ball carrying device is located on one side of the bottom plate, and the material guide roller assembly is fixedly installed on the moving assembly; the driving assembly drives the moving assembly to slide along the track assembly; the graduated scale is arranged on the side of the bottom plate; the material guide roller assembly slides along the rail assembly and determines the position corresponding to the graduated scale so as to be matched with coil stocks with different widths to be machined. The structure of the device is optimized, products with different coil stock widths can be produced by one set of die, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of cold stamping die uncoiling and blanking die production technology, and in particular to various adjustable roll width devices for uncoiling and blanking dies. Background Technology

[0002] Uncoiling and blanking dies are a type of equipment used in industries such as automobiles and steel plate distribution to uncoil and blank surface covering coils for subsequent stamping processes. They have the advantages of stable performance and high material utilization, so they are increasingly used in automotive stamping dies.

[0003] In the current stamping process of uncoiling and blanking dies, standard parts such as rollers, ferrules, and guide rulers are required on the feeding side to control and adjust the width of the feed roll. One set of dies can only produce products with one roll width. In actual production, different dies need to be changed to produce products with different roll widths. The die changing process is cumbersome and complicated, which reduces production efficiency.

[0004] Therefore, in the existing technology of uncoiling and blanking die stamping process, a set of dies can only produce products of one type of coil width, which causes inconvenience and low production efficiency. To solve the above problems, a device is provided that allows a set of dies to produce products of different coil widths. Utility Model Content

[0005] The purpose of this utility model is to provide an optimized structure, simple and convenient operation, and an adjustable uncoiling and blanking die with multiple roll widths that can produce products with different roll widths using a single mold and improve production efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] The uncoiling and blanking die includes multiple adjustable roll width devices, including ball conveying devices, material guide roller assemblies, guide plates, and nozzles. Multiple sets of ball conveying devices are distributed and installed between two sets of material guide roller assemblies. The nozzles are located on one side of the material guide roller assemblies, and the guide plates are located on one side of the ball conveying devices. The roll material slides along the ball conveying devices and is continuously transported by the guide plates. Both sides of the roll material slide in contact with the material guide roller assemblies, and the movement trajectory is defined by the nozzles. The die also includes:

[0008] Base plate;

[0009] A track assembly, wherein the track assembly is distributed and installed along the length direction of the base plate;

[0010] A movable component, wherein the movable component is partially movably connected to the track assembly;

[0011] The ball bearing conveying device and material guide roller assembly distributed on both sides of the upper end of the base plate are fixedly installed on the moving assembly;

[0012] A drive component that drives a moving component to slide along a track component;

[0013] A scale, which is set on the side of the base plate;

[0014] The ball bearing conveying device and the material guide roller assembly located on the moving component slide along the track assembly and are positioned according to the scale to cooperate in processing rolls of different widths.

[0015] Furthermore, the orbital assembly includes:

[0016] Track fixing blocks, which are distributed and installed on the base plate;

[0017] A slide rail, which is mounted on a track fixing block.

[0018] Furthermore, the moving component includes:

[0019] A rotating rod, located between two sets of slide rails;

[0020] The drive assembly drives the connecting rotating rod;

[0021] A connecting shaft is provided, one end of which is connected to a rotating rod via a bearing;

[0022] The two connecting shafts are connected to the other end of the first connecting shaft via bearings;

[0023] One slider and two sets of sliders are respectively movably mounted on one connecting shaft and the second connecting shaft;

[0024] The support plate is fixedly mounted on a slider part;

[0025] The ball bearing conveying device and the material guide roller assembly are respectively fixedly mounted on the support plate;

[0026] The drive assembly drives the rotating rod to rotate, causing the first part of the connecting shaft and the second part of the connecting shaft to move synchronously, so as to realize that the two sets of sliders move towards each other or away from each other along the length direction of the first part of the connecting shaft and the second part of the connecting shaft, respectively.

[0027] The two sets of sliders move along the length of connecting shaft one and connecting shaft two, respectively, and drive the support plate, ball bearing transport device, and material guide roller assembly to move synchronously.

[0028] Furthermore, two sliders are installed on both sides of the lower end of the support plate;

[0029] The two parts of the slider are slidably connected to the slide rail;

[0030] The movement of one part of the slider along the first part of the connecting shaft and the second part of the connecting shaft forms the synchronous sliding of the two parts of the slider along the slide rail.

[0031] Furthermore, an indicator plate is installed on one side of the support plate;

[0032] The lower end of the indicator plate extends to the scale.

[0033] The indicator plate slides along the slide rail following the support plate and indicates the scale position to provide real-time feedback on the movement distance of the ball conveying device and the material guide roller assembly.

[0034] Furthermore, the driving component includes:

[0035] The fixing base is installed at one end above the base plate;

[0036] One end of the rotating rod passes through the fixed base and extends to the outside of the fixed base;

[0037] A handwheel, which is fixedly connected to one end of a rotating rod extending to the outside of the fixed base;

[0038] Rotate the handwheel to drive the rotating rod to rotate synchronously.

[0039] Furthermore, a tightening element is installed on the rotating rod located between the fixed base and the handwheel;

[0040] The tightening component has mounting holes;

[0041] The rotating rod is inserted into the mounting hole;

[0042] The mounting hole extends upward to form an adjustment slot;

[0043] The tightening component is divided into two parts by an adjusting slot;

[0044] A tightening bolt is installed through one side of the tightening component;

[0045] Tightening the screw creates an adjustment gap that can be increased or decreased to adjust the tightness of the mounting hole clamping the rotating rod.

[0046] In the above technical solution, the various roll width adjustable devices of the unwinding and blanking die of this utility model have the following beneficial effects:

[0047] The present invention provides an adjustable roll width device for uncoiling and blanking mold. Based on the original mold, a track component, a moving component and a driving component are added. The driving component drives the moving component to slide on the track component, so that the position of the ball bearing device and the material guide roller component located on the moving component can be adjusted, thereby matching rolls of different widths. This enables rolls of different sizes to be processed and produced on the same mold. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0049] Figure 1 This is a schematic diagram of the structure of an existing uncoiling and blanking die in the background art (which can only produce products with one type of coil width).

[0050] Figure 2 This is a structural schematic diagram of a variety of adjustable roll width devices for the uncoiling and blanking die provided in an embodiment of this utility model.

[0051] Figure 3 This is a structural schematic diagram of a variety of adjustable roll width devices for the uncoiling and blanking die provided in an embodiment of this utility model.

[0052] Figure 4 A partial structural schematic diagram of various adjustable roll width devices for unwinding and blanking dies provided in this embodiment of the utility model.

[0053] Figure 5 A partial structural schematic diagram of various adjustable roll width devices for unwinding and blanking dies provided in this embodiment of the utility model.

[0054] Explanation of reference numerals in the attached figures:

[0055] 1. Ball bearing conveying device; 2. Material guide roller assembly; 3. Guide plate; 4. Grip; 5. Base plate; 6. Track assembly; 7. Moving assembly; 8. Drive assembly; 61. Track fixing block; 62. Slide rail; 71. Rotating rod; 72. Connecting shaft part 1; 73. Bearing; 74. Connecting shaft part 2; 75. Slider part 1; 76. Support plate; 77. Slider part 2; 81. Fixed seat; 82. Handwheel; 83. Tightening component; 831. Mounting hole; 832. Adjusting gap; 833. Tightening bolt; 91. Scale; 92. Indicator plate. Detailed Implementation

[0056] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0057] It should be noted that the terms "one side," "one end," "lower end," "other end," etc., used in this document indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of illustrative purposes and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "one part," "two parts," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0058] See Figures 1-5 As shown;

[0059] The uncoiling and blanking die includes multiple adjustable roll width devices, including a ball conveying device 1, a material guide roller assembly 2, a guide plate 3, and a V-shaped nozzle 4. Multiple ball conveying devices 1 are distributed between two sets of material guide roller assemblies 2. The V-shaped nozzles 4 are located on one side of the material guide roller assembly 2, and the guide plate 3 is located on one side of the ball conveying device 1. The roll material slides along the ball conveying device 1 and is continuously conveyed by the guide plate 3. Both sides of the roll material slide in contact with the material guide roller assembly 2, and the movement trajectory is limited by the V-shaped nozzles 4. The die also includes:

[0060] Base plate 5;

[0061] Track assembly 6 is installed along the length of base plate 5;

[0062] The movable component 7 is partially movably connected to the track component 6;

[0063] The ball bearing conveying device 1 and the material guide roller assembly 2, which are distributed on both sides of the upper end of the base plate 5, are fixedly installed on the moving assembly 7;

[0064] Drive component 8 drives moving component 7 to slide along track component 6;

[0065] Scale 91 is set on the side of the base plate 5;

[0066] The ball bearing conveying device 1 and the material guide roller assembly 2 located on the moving component 7 slide along the track assembly 6 and are positioned according to the scale 91 to cooperate in processing rolls of different widths.

[0067] Specifically, the uncoiling and blanking die features multiple adjustable roll width devices. The original die includes a ball bearing conveying device 1, a material guide roller assembly 2, a guide plate 3, and a V-shaped nozzle 4. The material guide roller assembly 2 is located at both ends of the die. During roll material transport, the material guide roller assembly 2 contacts both sides of the roll material. The material guide roller assembly 2 and the V-shaped nozzle 4 limit the movement trajectory of the roll material. The distance between the two sets of material guide roller assemblies 2 is the width of the roll material. The ball bearing conveying device 1 is located between the two sets of material guide roller assemblies 2 and is positioned below the roll material for transporting it. The guide plate 3 is located on one side of the ball bearing conveying device 1. The roll material moves continuously and is transported through the guide plate 3. Based on the original die, a base plate 5, a track assembly 6, a moving assembly 7, a drive assembly 8, and a scale 9 are added. 1. In this configuration, the base plate 5 is mounted on the mold, the track assembly 6 is mounted on the base plate 5, the moving assembly 7 can move along the track assembly 6, and the drive assembly 8 drives the moving assembly 7 to move. The ball bearing transport device 1 and the material guide roller assembly 2 located on both sides of the mold are mounted on the moving assembly 7. When the moving assembly 7 moves, the ball bearing transport device 1 and the material guide roller assembly 2 move synchronously with it. During the movement, the distance between the material guide roller assembly 2 on the moving assembly and the material guide roller assembly 2 on the other side can increase or decrease, that is, the width between the two sets of material guide roller assemblies 2 increases or decreases. By adjusting the position of the material guide roller assembly 2, it can match the processing of rolls of material of different widths. At the same time, the ball bearing transport device 1, which moves with the moving assembly 7, will also cooperate with the roll for material transmission.

[0068] Track assembly 6 includes:

[0069] Track fixing blocks 61 are distributed and installed on the base plate 5;

[0070] The slide rail 62 is mounted on the track fixing block 61.

[0071] Specifically, the track assembly 6 has a track fixing block 61 and a slide rail 62. The track fixing block 61 is installed on the base plate 5 and is used to support the slide rail 62 so that the slide rail 62 is installed and fixed.

[0072] Mobile component 7 includes:

[0073] Rotating rod 71, which is located between two sets of slide rails 62;

[0074] Drive assembly 8 drives and connects to rotating rod 71;

[0075] A connecting shaft 72 is provided, and one end of the connecting shaft 72 is connected to the rotating rod 71 via a bearing 73.

[0076] The second connecting shaft 74 is connected to the other end of the first connecting shaft 72 via a bearing 73;

[0077] One slider 75 and two sets of sliders 75 are respectively movably mounted on one connecting shaft 72 and two connecting shafts 74;

[0078] Support plate 76 is fixedly mounted on slider part 75;

[0079] Part of the ball bearing conveying device 1 and the material guide roller assembly 2 are fixedly installed on the support plate 76;

[0080] The drive assembly 8 drives the rotating rod 71 to rotate, so that the connecting shaft part 72 and the connecting shaft part 74 move synchronously to realize that the two sets of sliders part 75 move towards each other or away from each other along the length direction of the connecting shaft part 72 and the connecting shaft part 74 respectively;

[0081] Two sets of sliders 75 move along the length of connecting shaft 72 and connecting shaft 74 respectively, driving the support plate 76, ball conveying device 1, and material guide roller assembly 2 to move synchronously.

[0082] Specifically, the moving component 7 includes a rotating rod 71, a connecting shaft part 72, a bearing 73, a connecting shaft part 74, a slider part 75, and a support plate 76. The rotating rod 71 is located on the base plate 5 and between two sets of slide rails 62. The connecting shaft part 72 is connected to the rotating rod 71 via the bearing 73, and the connecting shaft part 72 is also connected to the connecting shaft part 74 via the bearing 73. When the driving component 8 drives the rotating rod 71 to rotate, the connecting shaft part 72 and the connecting shaft part 74 will rotate synchronously. A slider part 75 is installed on each of the connecting shaft part 72 and the connecting shaft part 74. The connecting shaft part 72 and the connecting shaft part 74 are equivalent to lead screws. When the connecting shaft part 72 and the connecting shaft part 74 rotate, the slider part 75 cooperates with the connecting shaft part 72 and the connecting shaft part 74. The two sets of sliders 75 can slide towards each other or in opposite directions. Each slider 75 is equipped with a support plate 76, on which a ball bearing conveying device 1 and a material guide roller assembly 2 are respectively distributed. When the two sets of sliders 75 move towards each other, the ball bearing conveying device 1 and the material guide roller assembly 2, which were originally located on both sides, move towards the middle position, narrowing the width of the roll material. Conversely, when the two sets of sliders 75 move away from each other, the ball bearing conveying device 1 and the material guide roller assembly 2, which were originally located on both sides, move to both sides, widening the width of the roll material. In this way, the distance between the two sets of material guide roller assemblies 2 changes. After checking the scale 91, the distance between the two sets of material guide roller assemblies 2 can be confirmed, thereby matching roll materials of different widths for processing.

[0083] Two sliders 77 are installed on both sides of the lower end of the support plate 76;

[0084] The slider 77 is slidably connected to the slide rail 62;

[0085] The slider part 75 moves along the connecting shaft part 72 and the connecting shaft part 74 to form the slider part 77 sliding synchronously along the slide rail 62.

[0086] Specifically, two slider parts 77 are provided on both sides of the lower end of the support plate 76. The slider parts 77 are mounted on the slide rail 62 and can slide along the slide rail 62. When the drive assembly 8 drives the rotating rod 71 to rotate and causes the connecting shaft 1 72 and the connecting shaft 2 74 to rotate synchronously, the slider 1 75 drives the support plate 76 to slide along the connecting shaft 1 72 and the connecting shaft 2 74. At this time, the slider parts 77 connected to the support plate 76 slide along the slide rail 62.

[0087] An indicator plate 92 is installed on one side of the support plate 76;

[0088] The lower end of the indicator plate 92 extends to the scale 91;

[0089] The indicator plate 92 slides along the slide rail 62 following the support plate 76 and indicates the scale position of the scale 91 to provide real-time feedback on the moving distance of the ball conveying device 1 and the material guide roller assembly 2.

[0090] Specifically, an indicator plate 92 is connected to the side wall of the support plate 76. The indicator plate 92 works in conjunction with the scale 91. One end of the indicator plate 92 can extend to the scale 91. When the support plate 76 slides along the slide rail 62, the indicator plate 92 moves synchronously. The lower end of the indicator plate 92 can correspond to the scale 91. The positions of the ball bearing conveying device 1 and the material guide roller assembly 2 on the support plate 76 are determined by the correspondence between the indicator plate 92 and the scale 91. The distance between the two sets of material guide roller assemblies 2 is determined, and then the roll of material of the corresponding width is selected for processing.

[0091] Driver component 8 includes:

[0092] Fixing base 81, the fixing base 81 is installed at one end above the base plate 5;

[0093] One end of the rotating rod 71 passes through the fixed base 81 and extends to the outside of the fixed base 81;

[0094] Handwheel 82 is fixedly connected to one end of rotating rod 71 that extends to the outside of fixed base 81;

[0095] Turn the handwheel 82 to drive the rotating rod 71 to rotate synchronously.

[0096] A tightening element 83 is installed on the rotating rod 71 located between the fixed base 81 and the handwheel 82;

[0097] The tightening member 83 has a mounting hole 831 formed thereon;

[0098] The rotating rod 71 is inserted into the mounting hole 831;

[0099] The mounting hole 831 extends upward to form an adjustment slot 832;

[0100] The tightening component 83 is divided into two parts by the adjusting slot 832;

[0101] A tightening bolt 833 is installed through one side of the tightening part 83;

[0102] Tightening or loosening the bolt 833 creates an adjusting gap 832, which can be increased or decreased to adjust the tightness of the mounting hole 831 holding the rotating rod 71.

[0103] Specifically, the drive assembly 8 has a fixed base 81, a handwheel 82, and a tightening component 83. The fixed base 81 is mounted on the base plate 5. One end of the rotating rod 71 passes through the fixed base 81 and is connected to the handwheel 82. During operation, the handwheel 82 is rotated to rotate the rotating rod 71. The rotation of the rotating rod 71 will drive the first connecting shaft 72 and the second connecting shaft 74 to rotate synchronously. At the same time, the first slider 75 moves linearly along the first connecting shaft 72 and the second connecting shaft 74, and the second slider 77 slides synchronously along the slide rail 62. This enables the support plate 76 and the ball bearing transport device 1 located on it to move synchronously with the material guide roller assembly 2 to adjust the width of the rolled material.

[0104] The tightening component 83 is installed on the rotating rod 71, specifically located between the fixed base 81 and the handwheel 82. The tightening component 83 securely mounts the rotating rod 71. An installation hole 831 is provided on the tightening component 83, through which the rotating rod 71 passes. An adjusting slot 832 connects above the installation hole 831, dividing the tightening component 83 above the installation hole 831 into two parts. By adjusting the size of the adjusting slot 832, the installation hole 831 is closed or opened, thereby decreasing or increasing its diameter. A gradually closing installation hole 831 with a smaller diameter increases the clamping force on the rotating rod 71, while an open installation hole 831 with a larger diameter decreases the clamping force on the rotating rod 71. The degree of clamping the rotating rod 71 is adjusted by screwing a tightening bolt 833 into one side of the tightening member 83. The tightening bolt 833 is inserted laterally into the adjusting slot 832. As the tightening bolt 833 is gradually tightened, the tightening member 83 on one side of the adjusting slot 832 gradually moves closer to the other side, the adjusting slot 832 becomes smaller, the mounting hole 831 gradually closes, and the rotating rod 71 is clamped more tightly. Conversely, as the tightening bolt 833 is gradually loosened, the tightening member 83 on one side of the adjusting slot 832 gradually moves away from the other side, the adjusting slot 832 becomes larger, the mounting hole 831 gradually opens, and the rotating rod 71 is loosened more. The degree of clamping the rotating rod 71 is adjusted in this way to meet the usage requirements.

[0105] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A kind of open blanking die multiple roll width adjustable device, including ball conveying device (1), material guide roller assembly (2), material guide plate (3) and Y mouth (4), two groups of the material guide roller assembly (2) between distribution installation has multiple ball conveying device (1), the Y mouth (4) is distributed in the one side of material guide roller assembly (2), the material guide plate (3) is distributed in the one side of ball conveying device (1), and the roll material is along the ball conveying device (1) and is transmitted continuously by material guide plate (3) by sliding and is contacted with the material guide roller assembly (2) on the two sides of roll material and is limited moving track by Y mouth (4), it is characterized in that, Also include: The bottom plate (5); Track assembly (6), the track assembly (6) is installed along the length of the bottom plate (5); Mobile assembly (7), the mobile assembly (7) is movably connected to the track assembly (6); The ball conveying device (1) and the material guide roller assembly (2) are fixedly installed on the mobile assembly (7); Drive assembly (8), the drive assembly (8) drives the mobile assembly (7) to slide along the track assembly (6); Scale (91), the scale (91) is arranged on the side of the bottom plate (5); The ball conveying device (1) and the material guide roller assembly (2) on the mobile assembly (7) slide along the track assembly (6) and determine the position corresponding to the scale (91) to cooperate with the processing of different width of the material.

2. The multi-width adjustable device of the open blanking die according to claim 1, wherein, The track assembly (6) comprises: Track fixing block (61), the track fixing block (61) is installed on the bottom plate (5); Slide rail (62), the slide rail (62) is installed on the track fixing block (61).

3. The multi-width adjustable device of the open blanking die according to claim 2, wherein, The mobile assembly (7) comprises: Rotary rod (71), the rotary rod (71) is located between the two groups of slide rails (62); The drive assembly (8) is drivingly connected to the rotary rod (71); Connecting shaft one part (72), one end of the connecting shaft one part (72) is connected to the rotary rod (71) through a bearing (73); Connecting shaft two part (74), the other end of the connecting shaft two part (74) is connected to the connecting shaft one part (72) through a bearing (73); Slide block one part (75), the two groups of slide block one part (75) are movably installed on the connecting shaft one part (72) and the connecting shaft two part (74) respectively; Support plate (76), the support plate (76) is fixedly installed on the slide block one part (75); Part of the ball conveying device (1) and the material guide roller assembly (2) are fixedly installed on the support plate (76); The drive assembly (8) drives the rotary rod (71) to rotate to form the synchronous movement of the connecting shaft one part (72) and the connecting shaft two part (74) to realize the movement of the two groups of slide block one part (75) along the length of the connecting shaft one part (72) and the connecting shaft two part (74) respectively. The two groups of slide block one part (75) move along the length of the connecting shaft one part (72) and the connecting shaft two part (74) respectively and drive the support plate (76) and the ball conveying device (1) and the material guide roller assembly (2) to move synchronously.

4. The adjustable device for multiple roll widths of the decoiling and blanking die according to claim 3, wherein: The support plate (76) is provided with slide block two part (77) on both sides of the lower end; The slide block two part (77) is slidingly connected to the slide rail (62); The movement of the slide block one part (75) along the connecting shaft one part (72) and the connecting shaft two part (74) forms the synchronous sliding of the slide block two part (77) along the slide rail (62).

5. The adjustable device for multiple roll widths of the decoiling and blanking die according to claim 3, wherein: The support plate (76) is provided with an indicator plate (92) on one side; The lower end of the indicator plate (92) extends to the scale (91). The indicating plate (92) slides along the slide rail (62) with the support plate (76) and indicates the scale position of the scale (91) to feedback the moving distance of the ball conveying device (1) and the material guide roller assembly (2) in real time.

6. The multi-width adjustable device of the open blanking die according to claim 3, wherein, The driving assembly (8) comprises: A fixed seat (81) is installed at one end above the bottom plate (5); One end of the rotating rod (71) passes through the fixed seat (81) and extends to the outside of the fixed seat (81); A hand wheel (82) is fixedly connected to one end of the rotating rod (71) extending to the outside of the fixed seat (81); Turn the hand wheel (82) to drive the rotating rod (71) to rotate synchronously.

7. The multi-width adjustable device of the strip-unwinding blanking die according to claim 6, characterized in that: A rotating fastener (83) is installed on the rotating rod (71) between the fixed seat (81) and the hand wheel (82); An installation hole (831) is formed on the rotating fastener (83); The rotating rod (71) is inserted into the installation hole (831); The installation hole (831) extends upward to form an adjusting slot (832); The rotating fastener (83) is divided into two parts through the adjusting slot (832); A rotating bolt (833) is installed through one side of the rotating fastener (833) inwardly; The rotating bolt (833) is screwed to increase or decrease the adjusting slot (832) to adjust the tightness of the installation hole (831) clamping the rotating rod (71).

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