A welding drive tension roller product for printers, copiers

Abstract

The utility model discloses a kind of welding drive tensioning roller products for printer, copying machine, including tube body, its both sides inside are equipped with support gland, shaft body is fixed on two support glands, pre-positioning structure, between the end of support gland and tube body, for fixing support gland in the pre-positioning of tube body before welding, wherein, tube body both ends wall is equipped with locating groove, pre-positioning structure and locating groove are embedded, locating groove is used to accommodate solder after pre-positioning of support gland, to fix support gland in tube body. Through the cooperation of pre-positioning structure and locating groove, support gland is quickly pre-positioned, so that support gland cannot be randomly active, reduce artificial adjustment time, also need not equipment auxiliary positioning, reduce the operation difficulty and equipment cost, and effectively utilize the remaining space of opening slot, ensure that solder can be filled fully when welding, improve welding strength.

Description

Technical Field

[0001] This utility model relates to the field of tension roller technology for printers and copiers, and in particular to a welded tension roller product for printers and copiers. Background Technology

[0002] In the manufacturing process of office automation equipment such as printers and copiers, the drive tension roller is a core component, and its manufacturing precision and reliability directly affect the performance of the entire machine. The drive tension roller is usually composed of a metal tube, a support cover, and a shaft. Among these components, firmly welding the support cover to the inside of the tube is a critical process.

[0003] However, in the assembly stage before welding, traditional processes lack efficient pre-positioning structures. After the worker installs the support cap into the metal tube, the support cap is prone to displacement, which may require manual secondary adjustment and the use of equipment for auxiliary positioning, increasing the difficulty of operation and equipment costs. At the same time, in traditional welding processes, the weld between the metal tube and the support cap is small, resulting in low welding strength. Utility Model Content

[0004] In order to overcome the shortcomings of the above-mentioned background technology, this utility model provides a welding drive tension roller product for printers and copiers, which can achieve rapid pre-positioning before welding, reduce manual adjustment time and eliminate the need for equipment-assisted positioning, thus ensuring welding strength.

[0005] The technical solution of this utility model is: a welding drive tension roller product for printers and copiers, characterized in that it includes: The tube body has supporting caps on both sides inside. A shaft, which is fixed through and to the two supporting covers; A pre-positioning structure is provided between the support cap and the end of the tube body, for fixing the support cap to a predetermined position on the tube body before welding; The tube body has positioning grooves on both ends of its walls. The pre-positioning structure fits into the positioning grooves. After the support cap is pre-positioned, the positioning grooves are used to accommodate solder to fix the support cap to the tube body.

[0006] As a preferred technical solution of this utility model, the pre-positioning structure includes multiple sets of symmetrical protrusions integrally formed around the periphery of the supporting cover, the positioning groove is an open groove, and several open grooves are opened on each side wall of the tube body, and each set of protrusions is fitted and positioned with the corresponding open groove.

[0007] As a preferred embodiment of this utility model, the outer circumferential surface of the shaft is provided with knurled keyways, and the thickness of the protrusion is equal to the depth of the opening groove, both being 1mm.

[0008] As a preferred technical solution of this utility model, it also includes limiting holes. Several sets of symmetrical limiting holes are opened on both sides of the tube body. Each set of limiting holes is connected to the corresponding opening groove. Each protrusion is provided with a locking block. The locking block is fitted and positioned with the corresponding limiting hole. The depth of the limiting hole is equal to the depth of the opening groove.

[0009] As a preferred embodiment of this invention, the locking block is provided with anti-slip teeth to enhance the friction between the locking block and the limiting hole.

[0010] As a preferred embodiment of this utility model, the card block is a wedge-shaped block.

[0011] As a preferred embodiment of this utility model, the cross-sectional shape of the protrusion is adapted to the cross-sectional shape of the opening groove, and the cross-sectional area of ​​the opening groove is larger than the cross-sectional area of ​​the protrusion.

[0012] As a preferred embodiment of this utility model, the sum of the widths of each group of protrusions is less than the width of the corresponding opening groove, and the difference between the sum of the widths of each group of protrusions and the width of the opening groove is 0.7mm, and the width difference forms the remaining space for accommodating solder.

[0013] As a preferred technical solution of this utility model, the pre-positioning structure includes an annular boss protruding circumferentially on the outer periphery of the supporting cover, and the positioning groove is an annular groove. The bottom diameter of the annular groove is larger than the outer diameter of the annular boss, so that after the annular boss is fitted into the annular groove, a radial gap is formed between the two.

[0014] As a preferred embodiment of this utility model, the radial gap forms an annular cavity surrounding the annular boss. The annular cavity is used to accommodate the solder, so as to realize the full circumference welding and fixing of the support cap into the tube body.

[0015] The beneficial effects of this utility model are: 1. By combining the pre-positioning structure and the positioning groove, the support cover can be quickly pre-positioned, preventing it from moving freely, reducing manual adjustment time, eliminating the need for equipment-assisted positioning, lowering the difficulty of operation and equipment costs, and effectively utilizing the remaining space of the opening groove to ensure that the solder can be fully filled during welding, thereby improving the welding strength.

[0016] 2. An anti-detachment design is adopted. Through the frictional cooperation of the locking block and the limiting hole, the drive tension roller that has completed the initial assembly can resist vibration or collision during the transfer process, preventing the support cover from falling off the tube body and ensuring the integrity of the semi-finished product.

[0017] 3. After the support cap is pre-fixed, it can be directly entered into the welding workshop, eliminating the need for repeated positioning operations. The stable assembly state of the drive tension roller facilitates direct operation of the welding machine, reducing manual intervention, thus shortening working hours and reducing production costs. Attached Figure Description

[0018] Figure 1 This is a top view of one embodiment of the present invention.

[0019] Figure 2 This is a bottom view of one embodiment of the present invention.

[0020] Figure 3 This is a cross-sectional view of one embodiment of the present invention.

[0021] Figure 4 This is an enlarged structural schematic diagram of one embodiment A of the present invention.

[0022] Figure 5 This is a partial cross-sectional structural schematic diagram of another embodiment of the present invention.

[0023] Figure 6 This is a partial exploded view of another embodiment of the present invention.

[0024] The markings in the figure are: 1-pipe body, 2-opening groove, 31-support cap, 32-protrusion, 4-shaft body, 41-knurled keyway teeth, 51-limiting hole, 52-block, 61-annular groove, 62-annular boss. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below. Example

[0026] like Figures 1 to 4As shown, this utility model provides a welding drive tension roller product for printers and copiers, including a tube body 1, a tube body 1, a tube body 1, and a tube body 1. The inner diameter of the tube body 1 is 20mm and the length is 342mm. Supporting covers 31 are provided on both sides of the tube body 1. The thickness of the supporting covers 31 is 20mm. A shaft body 4 is fixed through and fixed on the two supporting covers 31. The outer circumferential surface of the shaft body 4 is provided with knurled keyway teeth 41. A pre-positioning structure is provided between the supporting covers 31 and the end of the tube body 1. It is used to fix the supporting covers 31 in a predetermined position on the tube body 1 before welding. Positioning grooves are opened on both end walls of the tube body 1. The pre-positioning structure is fitted into the positioning grooves. After the supporting covers 31 are pre-positioned, the positioning grooves are used to accommodate the welding material so as to fix the supporting covers 31 to the tube body 1.

[0027] The pre-positioning structure includes two sets of symmetrical protrusions 32 integrally formed around the periphery of the support cap 31. The positioning groove is an open groove 2. Two open grooves 2 are opened on each side wall of the tube body 1. Each set of protrusions 32 is fitted and positioned with the corresponding open groove 2. Of course, in other embodiments, the number of open grooves 2 can also be one, three, four, etc. The number of sets of protrusions 32 matches the number of open grooves 2 to realize the support cap 31 being welded and fixed in the tube body 1 at one point or multiple points. The open groove 2 is used to accommodate the solder used to weld and fix the support cap 31 to the tube body 1. The opening groove 2 has a depth of 1 mm and the protrusion 32 has a thickness of 1 mm. In other embodiments, the depth of the opening groove 2 and the thickness of the protrusion 32 can also be 0.75 mm and 1.25 mm, respectively, which can quickly pre-position the support cover 31. The cross-sectional shape of the protrusion 32 is adapted to the cross-sectional shape of the opening groove 2, and the cross-sectional area of ​​the opening groove 2 is larger than the cross-sectional area of ​​the protrusion 32. The difference between the sum of the widths of each group of protrusions 32 and the width of the opening groove 2 is 0.7 mm. In other embodiments, it can also be 0.5 mm, 0.8 mm, etc.

[0028] It also includes limiting holes 51. Several sets of symmetrical limiting holes 51 are opened on both sides of the tube body 1. The depth of the limiting holes 51 is 1mm. In other embodiments, the depth of the limiting holes 51 can also be 0.75mm or 1.25mm. Each set of limiting holes 51 is connected to the corresponding opening groove 2. Each protrusion 32 is provided with a locking block 52. The locking block 52 is engaged and positioned with the corresponding limiting hole 51. The locking block 52 is a wedge-shaped block. In other embodiments, the locking block 52 can also be a strip hole or a fan-shaped block, all of which can stably fix the support cover 31 inside the tube body 1.

[0029] The locking block 52 is provided with anti-slip teeth to enhance the friction between the locking block 52 and the limiting hole 51.

[0030] Specific working principle: When the support cap 31 needs to be welded into the pipe body 1, the worker first adjusts the position of the support cap 31 so that the protrusion 32 is engaged in the corresponding opening groove 2, achieving rapid pre-positioning of the support cap 31. This prevents the support cap 31 from moving freely, reducing manual adjustment time and eliminating the need for equipment-assisted positioning, thus lowering the operational difficulty and equipment cost. The remaining space in the opening groove 2 is specifically designed to accommodate the solder, ensuring that the solder can be fully filled during welding, improving the welding strength. The locking block 52 then engages in the limiting hole 51. Through the frictional engagement formed after the locking block 52 is embedded in the limiting hole 51, the support cap 31 can be stably fixed without additional clamps. The support cap 31 is fixed inside the tube body 1, so that the drive tension roller, which has completed the initial assembly, can resist vibration or collision during transportation, preventing the support cap 31 from falling off from the tube body 1 and ensuring the integrity of the semi-finished product. After both support caps 31 are installed, the worker finally installs the shaft 4 on the two support caps 31. The shaft 4 passes through the support caps 31 and the knurled keyway teeth 41 are located on the outside. Then the worker transports the assembled drive tension roller to the welding workshop for welding. The support cap 31 is assembled and fixed by the frictional cooperation of the locking block 52 and the limiting hole 51, so that the assembled drive tension roller is easy to transport during transportation and there is no need to worry about the support cap 31 falling off.

[0031] When the tension roller is driven to perform welding operations, the support cover 31 can be directly entered into the welding workshop after pre-fixing, eliminating the need for repeated positioning operations, reducing manual intervention and thus shortening the working time. The limiting mechanism of the clamp block 52 ensures that the support cover 31 does not need to be fixed by external fixing devices during the welding process, thereby reducing production costs. Example

[0032] like Figure 1 , Figure 5 and Figure 6 As shown, this embodiment is similar to Embodiment 1, except that the pre-positioning structure includes an annular boss circumferentially protruding from the outer periphery of the support cap 31, and an annular groove. Each side wall of the tube body 1 has an annular groove, and the bottom diameter of the annular groove is larger than the outer diameter of the annular boss, so that after the annular boss is fitted into the annular groove, a radial gap is formed between the two. The radial gap constitutes an annular cavity surrounding the annular boss. The width of the annular cavity is 0.3 mm. The annular cavity is used to accommodate solder to achieve full circumferential welding and fixing of the support cap 31 inside the tube body 1. The depth of the annular groove is 1 mm, and the thickness of the annular boss is 1 mm. In other embodiments, the depth of the annular groove and the thickness of the annular boss can also be 0.75 mm and 1.25 mm, respectively, which can also quickly pre-position the support cap 31.

[0033] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A welding drive tension roller product for printers, copiers, characterized by, include: The tube body has supporting caps on both sides inside. A shaft, which is fixed through and to the two supporting covers; A pre-positioning structure is provided between the support cap and the end of the tube body, for fixing the support cap to a predetermined position on the tube body before welding; The tube body has positioning grooves on both ends of its walls. The pre-positioning structure fits into the positioning grooves. After the support cap is pre-positioned, the positioning grooves are used to accommodate solder to fix the support cap to the tube body.

2. A welding drive tension roller product for printers, copiers as claimed in claim 1 characterized in that: The pre-positioning structure includes multiple sets of symmetrical protrusions integrally formed around the periphery of the support cap, the positioning groove is an open groove, and several open grooves are opened on each side wall of the tube body. Each set of protrusions is fitted and positioned with the corresponding open groove.

3. A welding drive tension roller product for printers and copiers as described in claim 2, characterized in that: The outer circumferential surface of the shaft is provided with knurled keyways, and the thickness of the protrusion is equal to the depth of the opening groove, both being 1 mm.

4. A welding drive tension roller product for printers, copiers as claimed in claim 2, characterized in that: It also includes limiting holes. Several sets of symmetrical limiting holes are opened on both sides of the tube body. Each set of limiting holes is connected to the corresponding opening groove. Each protrusion is provided with a locking block. The locking block is engaged and positioned with the corresponding limiting hole. The depth of the limiting hole is equal to the depth of the opening groove.

5. A welding drive tension roller product for printers and copiers as described in claim 4, characterized in that: The locking block is provided with anti-slip teeth to enhance the friction between the locking block and the limiting hole.

6. A solder drive tension roller product for printers, copiers as claimed in claim 4, characterized in that: The card block is a wedge-shaped block.

7. A welding drive tension roller product for printers and copiers as described in claim 2, characterized in that: The cross-sectional shape of the protrusion is adapted to the cross-sectional shape of the opening groove, and the cross-sectional area of ​​the opening groove is larger than the cross-sectional area of ​​the protrusion.

8. A soldered drive tension roller product for printers, copiers, according to any one of claims 2-7, characterized in that: The sum of the widths of each group of protrusions is less than the width of the corresponding opening groove, and the difference between the sum of the widths of each group of protrusions and the width of the opening groove is 0.7 mm. This width difference forms the remaining space for accommodating solder.

9. A welding drive tension roller product for printers, copiers as claimed in claim 1, characterized in that: The pre-positioning structure includes an annular boss protruding circumferentially from the outer periphery of the supporting cover, and the positioning groove is an annular groove. The bottom diameter of the annular groove is larger than the outer diameter of the annular boss, so that after the annular boss is fitted into the annular groove, a radial gap is formed between the two.

10. A welding drive tension roller product for printers, copiers as claimed in claim 9, characterized in that: The radial gap forms an annular cavity surrounding the annular boss, which is used to accommodate solder to achieve full circumference welding and fixation of the support cap within the tube.

Images