Novel outer bag drawstring

Abstract

The utility model relates to a novel outer wrapping drawstring, and relates to the technical field of drawstring fastening, the novel outer wrapping drawstring comprises a drawstring body, the drawstring body comprises an abutting part, a locking device and two fixing parts, the abutting part is a strip-shaped plate with flexibility and is used for pressing the outer wall of a tank body, and the fixing parts and the abutting part are integrally formed; the locking device is used for fastening the two fixing parts together and comprises a bolt, a first nut and two fixing columns, the fixing columns abut against the fixing parts, the bolt sequentially penetrates through the side walls of the two fixing columns to be in threaded connection with the first nut, the axis of the bolt is perpendicular to the axis direction of the fixing columns, and the abutting part is sleeved with a protective layer. The tank has the effect of simplifying the disassembly and assembly operation of the tank body.

Description

Technical Field

[0001] The present application relates to the technical field of drawstring fastening, and in particular to a novel outsourced drawstring. Background Art

[0002] The securing straps for air-driven urea tanks are typically used to secure the tank, ensuring its stability and safety during vehicle operation. The design and use of these straps are particularly important in commercial vehicle exhaust treatment systems, especially those meeting China IV emission standards and above, which require the installation of nitrogen oxide after-treatment devices such as air-driven urea injection systems. These systems utilize the stored air pressure in the urea tank to provide injection pressure, making the tank's securement crucial.

[0003] For related technology, please refer to the Chinese patent with announcement number CN207905900U, which discloses a band-type urea tank module, which includes a band, a band fixing pin, a band nut and a urea tank bracket; the band is an annular structure with an opening, and the band positioning pins are arranged in the accommodating space at both ends of the band in the circumferential direction; the band screw passes through the flange portion, the band positioning pin and the urea tank bracket, and the band nut is tightened on the band screw to fix the urea tank on the urea tank bracket.

[0004] With respect to the above-mentioned related technologies, the band and the bracket body are connected by means of a band nut, a band fixing pin and a band screw, and the above-mentioned connection structure is provided at both ends of each band. Therefore, when the user connects or disconnects the urea tank body and the urea tank bracket, the user needs to connect or disconnect the two ends of each band to the urea tank bracket respectively. Therefore, the connection and disconnection operation of the urea tank body and the urea tank bracket is relatively cumbersome and the operation efficiency is low. The gasket provided between the band and the urea tank needs to be placed in the gap between the band and the urea tank when the band is initially fixed to the bracket but not fastened to the tank body. Then, the band nut is tightened to press the gasket against the gasket and then tighten the urea tank. The operation is complicated and requires multiple staff members to operate. Utility Model Content

[0005] In order to simplify the disassembly and assembly operations of the tank body, the present application provides a new type of outer drawstring.

[0006] This application provides a new type of outer drawstring, which adopts the following technical solution:

[0007] A new type of outer drawstring, including a drawstring body, the drawstring body including an abutment portion, a locking device and two fixing portions, the abutment portion is a flexible long strip plate and is used to press the outer wall of the tank body, the two fixing portions are respectively located at both ends of the abutment portion in the length direction, the fixing portion and the abutment portion are integrally formed, the locking device is used to fasten the two fixing portions together, the locking device includes a bolt, a first nut and two fixing columns, the fixing column abuts against the fixing portion, the bolt passes through the side walls of the two fixing columns in turn and is threadedly connected to the first nut, the axis of the bolt is perpendicular to the axis of the fixing column, and a protective layer is provided on the outer cover of the abutment portion.

[0008] By adopting the above technical solution, the drawstring body is placed above the tank body, and the two fixing parts are pulled downward so that the abutting part presses the outer wall of the tank body. The abutting part is flexible so that the abutting part bends to adapt to the shape of the outer wall of the tank body. As the two fixing parts gradually approach and are locked together using bolts and a first nut, the drawstring body fixes the tank body to the frame. At the same time, a protective layer is provided on the outer cover of the abutting part, and there is no need to lay a protective layer separately, which reduces one process and the number of staff. The protective layer reduces the wear between the abutting part and the tank body and increases the friction, thereby achieving stable fixation of the tank body, and has a simple structure and is easy to install.

[0009] Optionally, the fixing portion includes an arc portion, a first connecting plate and a second connecting plate, and the abutting portion, the first connecting plate, the arc portion and the second connecting plate are integrally formed in sequence, and the first connecting plate and the second connecting plate are fixedly connected by rivet-free riveting, and the arc portion, the first connecting plate and the second connecting plate form a closed annular structure.

[0010] By adopting the above technical solution, a locking device for locking the fixing portion is installed in the closed annular structure formed by the arc portion, the first connecting plate and the second connecting plate. The rivetless riveting process is fast, which can significantly improve production efficiency and reduce production costs.

[0011] Optionally, both ends of the protective layer cover the connection between the first connecting plate and the second connecting plate.

[0012] By adopting the above technical solution and wrapping the riveted joints with a protective layer, the corrosion resistance of the connection parts can be improved and the service life can be extended.

[0013] Optionally, a plurality of protrusions are provided on the side of the protective layer that contacts the tank body.

[0014] By adopting the above technical solution, a number of protrusions are provided on the side where the protective layer is in contact with the tank body, so that the contact between the protective layer and the tank body is closer, the fixing effect is enhanced, the shaking of the tank body during transportation and use is reduced, and the stability and safety of the overall system are improved.

[0015] Optionally, the second connecting plate is located on a side of the abutting portion away from the protrusion.

[0016] By adopting the above technical solution, when the two fixing parts approach each other, the second connecting plate is located on the side of the abutting part away from the protrusion, the protrusion abuts against the tank body, the first connecting plate and the abutting part are formed as one piece, and the first connecting plate approaches the tank body along the bending arc of the abutting plate, thereby avoiding that when the first connecting plate approaches the tank body, the end of the second connecting plate away from the arc portion abuts against the tank body, so that the corners of the second connecting plate interact with the tank body to damage the protective layer and then rub against each other, thereby damaging the surface of the tank body.

[0017] Optionally, the fixing column abuts against the inner wall of the arc-shaped portion, and a through groove for the passage of a bolt is formed along the circumference of the arc-shaped portion at one end of the arc-shaped portion away from the abutting portion.

[0018] By adopting the above technical solution, a through slot is provided so that the bolt passes through the through slot and can rotate in the through slot, and the fixing column and the bolt rotate in the abutment portion, so that the fixing tightness of the drawstring body to the tank body can be adjusted, adapting to the fixing requirements of tanks of different sizes and shapes.

[0019] Optionally, limiting grooves are provided at both ends of the fixing column, the side walls of the limiting grooves abut against the inner wall of the arc-shaped portion, and one side of the fixing column between the two limiting grooves is located in the through groove.

[0020] By adopting the above technical solution, the part of the arc portion with a through groove is inserted into the limiting groove, the fixing column between the two limiting grooves is inserted into the through groove, and the arc portion and the fixing column are engaged with each other, preventing the fixing column from sliding in the arc portion, thereby ensuring the stability and safety of the drawstring during use.

[0021] Optionally, a second nut and a third nut are threadedly connected in sequence along the axial direction between the end of the bolt away from the first nut and the first nut.

[0022] By adopting the above technical solution, the second nut and the bolt jointly lock one of the fixing columns, and the third nut and the first nut move on the bolt to lock the other fixing column, reducing the loosening of the bolt caused by vibration and improving the reliability of the pull belt.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. Place the drawstring body above the tank body and pull the two fixing parts downward to press the abutment part against the outer wall of the tank body. The abutment part is flexible and bends to fit the shape of the outer wall of the tank body. As the two fixing parts gradually approach each other, they are locked together using bolts and a first nut, so that the drawstring body fixes the tank body to the vehicle frame. A protective layer is also provided on the outer cover of the abutment part, eliminating the need for a separate protective layer, reducing a process and the number of workers. The protective layer reduces wear and increases friction between the abutment part and the tank body, achieving stable fixation of the tank body. It also has a simple structure and is easy to install.

[0025] 2. The arc-shaped portion, the first connecting plate, and the second connecting plate form a closed ring structure in which a device for locking the fixing portion is installed. The rivet-free riveting process is fast, which can significantly improve production efficiency and reduce production costs.

[0026] 3. Using a protective layer to wrap the riveted joints can improve the corrosion resistance of the connection parts and extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of the drawstring body.

[0028] Figure 2 It is a structural diagram of a new type of outsourced drawstring in use.

[0029] Figure 3 It is a structural diagram of the fixed column and bolt connection.

[0030] Explanation of the accompanying drawings: 1. Pull belt body; 11. Abutment portion; 12. Fixing portion; 121. Arc-shaped portion; 1211. Through groove; 122. First connecting plate; 123. Second connecting plate; 13. Protective layer; 131. Protrusion; 14. Fixing column; 141. Limiting groove; 15. Bolt; 151. First nut; 152. Second nut; 153. Third nut. DETAILED DESCRIPTION

[0031] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0032] The embodiment of the present application discloses a novel outer drawstring.

[0033] Reference Figure 1 A novel external drawstring includes a drawstring body 1, which is an integrally formed, flexible, long strip of sheet material, such as plastic steel. The drawstring body 1 comprises, from the center toward each end, an abutment portion 11, a first connecting plate 122, an arcuate portion 121, and a second connecting plate 123. The first connecting plate 122, the arcuate portion 121, and the second connecting plate 123 are collectively referred to as the fixing portion 12.

[0034] Reference Figure 2 The arcuate portion 121 is provided with a through slot 1211. The arcuate portion 121 is folded into an arc shape, and the second connecting plate 123 is brought into contact with the first connecting plate 122. The second connecting plate 123 is then fixed to the first connecting plate 122 via a rivetless riveting method, forming a closed annular structure. The specific riveting method involves using a dedicated riveting tool to press the material of the first connecting plate 122 into the material of the second connecting plate 123, thereby forming a rivet-like structure without the need for any additional connecting parts. This connection method not only simplifies the production process and improves production efficiency, but also effectively reduces production costs.

[0035] Reference Figure 2 After riveting, the connection between the second connecting plate 123 and the first connecting plate 122 and the exterior of the abutment portion 11 are completely covered with a protective layer 13. This protective layer 13 reduces wear and increases friction between the drawstring body 1 and the can body, ensuring stable fixation of the can body. Wrapping the riveted joint with the protective layer 13 improves the corrosion resistance of the connection and extends its service life. Several protrusions 131 are provided on the side where the protective layer 13 contacts the can body, ensuring closer contact between the protective layer 13 and the can body, enhancing the fixation effect, reducing the shaking of the can body during transportation and use, and improving the stability and safety of the entire system.

[0036] Reference Figure 2 The two fixing parts 12 are fastened together by setting a locking device. The locking device includes a bolt 15, a first nut 151 and two fixing columns 14. The fixing column 14 is located in a closed annular structure formed by the arc portion 121, the first connecting plate 122 and the second connecting plate 123. The fixing column 14 abuts the inner wall of the arc portion 121. The bolt 15 passes through the side walls of the two fixing columns 14 in turn and is threadedly connected to the first nut 151. The axis of the bolt 15 is perpendicular to the axis direction of the fixing column 14, so that the bolt 15 can rotate freely on the fixing column 14 and adjust the tightness. In order to adapt to the fixing requirements of tanks of different sizes and shapes, a through groove 1211 for the bolt 15 to pass through is opened along its circumference at one end of the arc portion 121 away from the abutting portion 11. This design makes the fixing tightness of the drawstring body 1 to the tank adjustable, which is more flexible and practical.

[0037] Reference Figure 3The fixing post 14 has limiting grooves 141 at both ends, and the side walls of these limiting grooves 141 abut against the inner wall of the arcuate portion 121. One side of the fixing post 14 between the two limiting grooves 141 is located in the through groove 1211, and the portion of the arcuate portion 121 where the through groove 1211 is located is locked into the limiting groove 141. The arcuate portion 121 and the fixing post 14 are locked together, preventing the fixing post 14 from sliding within the arcuate portion 121, ensuring the stability and safety of the drawstring during use.

[0038] Reference Figure 3 A second nut 152 and a third nut 153 are threadedly connected in sequence between the end of the bolt 15 away from the first nut 151 and the first nut 151 along the axial direction.

[0039] Reference Figure 2 Specific steps for using the drawstring: First, place the drawstring body 1 on the bracket on the vehicle, lift the tank body perpendicular to its own axis, move the two fixing parts 12 toward each other, bend the drawstring body 1, rotate the bolt 15, and the bolt 15 passes through the two fixing columns 14 in turn to preliminarily lock the two fixing parts 12 together. The head of the bolt 15 and the second nut 152 jointly clamp one of the fixing columns 14, and the third nut 153 and the first nut 151 jointly clamp the other fixing column 14, reducing the loosening of the bolt 15 caused by vibration and improving the reliability of the drawstring. By rotating the third nut 153 and the first nut 151 in the direction of the second nut 152, the distance between the two fixing parts 12 is reduced, so that the drawstring body 1 tightly fixes the cylinder body and the bracket together. The setting of the fixing column 14 and the bolt 15 makes the fixing tightness of the drawstring body 1 to the tank body adjustable, which meets the fixing requirements of tanks of different sizes and shapes. The second connecting plate 123 is located on the side of the abutment portion 11 away from the protrusion 131. When the two fixing portions 12 approach each other to lock the can body, the second connecting plate 123 will not produce unnecessary contact or friction with the can body to damage the protective layer 13, which further protects the surface of the can body from damage and ensures the normal operation of the drawstring.

[0040] The implementation principle of a new type of external drawstring in the embodiment of the present application is: place the drawstring body 1 above the tank body, pull the two fixing parts 12 downward, so that the abutment part 11 presses the outer wall of the tank body, and the abutment part 11 is flexible, so that the abutment part 11 is bent to adapt to the shape of the outer wall of the tank body. As the two fixing parts 12 gradually approach and use the bolt 15 and the first nut 151 to lock the two fixing parts together, the drawstring body 1 fixes the tank body to the frame. At the same time, a protective layer 13 is provided on the outer cover of the abutment part 11, and there is no need to lay the protective layer 13 separately, which reduces one process and reduces the number of staff. The protective layer 13 reduces the wear between the abutment part 11 and the tank body and increases the friction, thereby achieving stable fixation of the tank body, and has a simple structure and is easy to install.

[0041] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A novel outer drawstring, comprising a drawstring body (1), characterized in that: The drawstring body (1) comprises an abutting portion (11), a locking device and two fixing portions (12). The abutting portion (11) is a long, flexible plate and is used to press the outer wall of the tank body. The two fixing portions (12) are respectively located at both ends of the abutting portion (11) in the length direction. The fixing portion (12) and the abutting portion (11) are integrally formed. The locking device is used to fasten the two fixing portions (12) together. The locking device comprises a bolt (15), a first nut (151) and two fixing columns (14). The fixing columns (14) abut against the fixing portion (12). The bolt (15) passes through the side walls of the two fixing columns (14) in sequence and is threadedly connected to the first nut (151). The axis of the bolt (15) is perpendicular to the axis of the fixing column (14). The outer cover of the abutting portion (11) is provided with a protective layer (13).

2. The novel outer drawstring according to claim 1, characterized in that: The fixing portion (12) comprises an arcuate portion (121), a first connecting plate (122) and a second connecting plate (123); the abutting portion (11), the first connecting plate (122), the arcuate portion (121) and the second connecting plate (123) are integrally formed in sequence; the first connecting plate (122) and the second connecting plate (123) are fixedly connected by riveting without rivets; the arcuate portion (121), the first connecting plate (122) and the second connecting plate (123) form a closed annular structure.

3. The novel outer drawstring according to claim 2, characterized in that: The two ends of the protective layer (13) cover the connection between the first connecting plate (122) and the second connecting plate (123).

4. The novel outer drawstring according to claim 2, characterized in that: A plurality of protrusions (131) are provided on the side of the protective layer (13) that contacts the tank body.

5. The novel outer drawstring according to claim 4 is characterized in that: The second connecting plate (123) is located on a side of the abutting portion (11) away from the protrusion (131).

6. The novel outer drawstring according to claim 2, characterized in that: The fixing column (14) abuts against the inner wall of the arc-shaped portion (121), and a through slot (1211) for the bolt (15) to pass through is provided along the circumference of the arc-shaped portion (121) at one end of the arc-shaped portion (121) away from the abutting portion (11).

7. The novel outer drawstring according to claim 6, characterized in that: Limiting grooves (141) are provided at both ends of the fixing column (14), the side walls of the limiting grooves (141) abut against the inner wall of the arc-shaped portion (121), and one side of the fixing column (14) between the two limiting grooves (141) is located in the through groove (1211).

8. The novel outer drawstring according to claim 1 is characterized in that: A second nut (152) and a third nut (153) are threadedly connected in sequence along the axial direction between one end of the bolt (15) away from the first nut (151) and the first nut (151).

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