A handheld mobile spiral binding mechanism

Abstract

This invention relates to a handheld mobile spiral hemming mechanism, comprising a support assembly. An input shaft and an output shaft are rotatably connected within the support assembly. The input shaft and the output shaft are rotatably connected. A spiral pressure ring is fixed on the output shaft. The spiral pressure ring has a highest point and a lowest point on its side. A guide circle is also provided on the spiral pressure ring. A reference block is also provided on the support assembly. The advantages of this invention are: 1. The gap between the highest point of the spiral surface and the reference block is adjustable, enabling hemming of components with different thicknesses; 2. The hemming process is optimized by using the spiral pressure ring to press along the hemming component in a straight direction, thereby improving hemming efficiency; 3. It is suitable for small-batch production of parts such as prototypes and non-standard parts; 4. The structure is reasonable, the size is small, and the operation is simple; 5. It increases production efficiency and reduces production costs.

Description

Technical Field

[0001] This invention relates to the field of automotive edging technology, and in particular to a handheld mobile spiral edging mechanism. Background Technology

[0002] The automobile has undergone a long development process. With the continuous development of industry, people's requirements for automobiles have also increased. From initially focusing solely on the practicality of automobiles, people have now begun to pay attention to their aesthetics. This has indirectly led to the continuous improvement of automobile manufacturing processes. The automobile manufacturing process includes mass production and small-batch trial production. Mass production, or batch production, refers to the large-scale production of an item after a series of tests and passing necessary specification approvals. Small-batch production is an indispensable part of the development process.

[0003] In the entire automotive manufacturing process, mass-produced models typically have a mature production line. However, during trial production (small batches), if a complete production line were to be diverted, it would significantly increase manufacturing costs. This is especially true for the rear panel (the area below the trunk), which requires edge binding during trial production. Current technologies, categorized by application scenario, can be broadly divided into: 1. For mass production of mass-produced models, dedicated hydraulic edge binding equipment is used, employing hydraulic clamping; 2. For trial production (small batches), edge binding is done manually by hammering. Dedicated edge binding equipment is highly specialized, bulky, heavy, and has a fixed application scenario, suitable for mass production on automotive production lines. Purchasing dedicated equipment separately for trial production (small batches) would increase overall production costs, and the infrequent use of such equipment would also increase maintenance expenses. Therefore, currently, manual hammering is commonly used for edge binding during the trial production stage, but this method is inefficient.

[0004] Therefore, it is very necessary to provide a handheld mobile spiral edge-wrapping mechanism to solve the above-mentioned technical problems. Summary of the Invention

[0005] This invention provides a handheld mobile spiral binding mechanism, which solves the problem in related technologies where purchasing dedicated equipment during trial production and small-batch production increases overall production costs. Furthermore, the low usage frequency of dedicated equipment in the later stages also increases maintenance costs. Therefore, current trial production typically uses manual tapping for binding, but this method is inefficient.

[0006] On one hand, embodiments of the present invention provide a handheld mobile spiral binding mechanism.

[0007] The device includes a support assembly, within which an input shaft and an output shaft are rotatably connected. The input shaft and the output shaft are rotatably connected. A helical pressure ring is fixed on the output shaft. The helical pressure ring has a highest point and a lowest point on its side. The helical pressure ring also has a guide circle. The support assembly also has a reference block, which is arranged parallel to the input shaft. An adjusting shim is provided between the reference block and the support assembly. An edge-sealing assembly is provided between one of the reference blocks and the helical pressure ring.

[0008] Furthermore, a bearing is fixed on the support assembly, and the input shaft and output shaft are rotatably connected to the support assembly through the bearing.

[0009] Furthermore, input shaft connectors are provided at both ends of the input shaft.

[0010] Furthermore, a first gear is fixed on the input shaft, and a second gear is fixed on the output shaft. The first gear meshes with the second gear, and the input shaft is rotatably connected to the output shaft through the first gear and the second gear.

[0011] Furthermore, a first gear is fixed on the input shaft, and a second gear is fixed on the output shaft. The first gear meshes with the second gear, and the input shaft is rotatably connected to the output shaft through the first gear and the second gear.

[0012] Furthermore, the support assembly includes a first support and a second support, the first support being U-shaped and the second support being I-shaped, and the U-shaped first support and the I-shaped second support being provided with support through holes.

[0013] Furthermore, a bolt is inserted through the through hole of the support, and the first support and the second support are connected by the bolt.

[0014] Furthermore, the edge-sealing assembly includes an inner panel and an outer panel.

[0015] The beneficial effects of the technical solution provided by this invention include:

[0016] 1. The gap between the highest point of the spiral surface and the reference block in this application is adjustable, enabling edge wrapping of components with different thicknesses;

[0017] 2. The edge-binding process has been optimized. By rotating the spiral pressure ring and pressing along the edge-binding component in a straight line, the edge-binding efficiency has been improved.

[0018] 3. Suitable for small-batch production of parts such as prototypes and non-standard parts;

[0019] 4. The structure is reasonably designed, the size is small, and the operation is simple;

[0020] 5. Increased production efficiency and reduced production costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of a handheld mobile spiral edge-binding mechanism according to the present invention;

[0023] Figure 2 This is a top view of a handheld mobile spiral edge-binding mechanism according to the present invention;

[0024] Figure 3 This is one of the schematic diagrams of a handheld mobile spiral edge-binding mechanism according to the present invention;

[0025] Figure 4 This is a second schematic diagram of a handheld mobile spiral edge-binding mechanism according to the present invention;

[0026] Figure 5 for Figure 4 Side view;

[0027] Figure 6 This is a front view of the input shaft and output shaft in a handheld mobile spiral hemming mechanism of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of a handheld mobile spiral edge-binding mechanism including an edge-binding component according to the present invention;

[0029] Figure 8 This is one of the schematic diagrams of the inner and outer plates in a handheld mobile spiral edge-binding mechanism of the present invention;

[0030] Figure 9 This is a second schematic diagram of the inner and outer plates in a handheld mobile spiral edge-binding mechanism of the present invention;

[0031] Figure 10 This is the third schematic diagram of the inner and outer plates in a handheld mobile spiral edge-binding mechanism of the present invention.

[0032] In the diagram: 10. Support assembly; 11. First support; 12. Second support; 13. Support through hole; 14. Bolt; 20. Input shaft; 21. Input shaft connector; 30. Output shaft; 40. Helical surface pressure ring; 41. Highest point of the helical surface; 42. Lowest point of the helical surface; 43. Guide circle; 50. Reference block; 60. Edge-sealing assembly; 61. Inner plate; 62. Outer plate; 70. Bearing; 80. First gear; 90. Second gear; 100. Adjusting shim. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] See Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, this embodiment of the invention provides a handheld mobile spiral binding mechanism.

[0035] The device includes a support assembly 10, in which an input shaft 20 and an output shaft 30 are rotatably connected. The input shaft 20 and the output shaft 30 are rotatably connected. A spiral pressure ring 40 is fixed on the output shaft 30. The support assembly 10 is also provided with a reference block 50, which is arranged parallel to the input shaft 20. An edge-sealing assembly 60 is provided between one of the reference blocks 50 and the spiral pressure ring 40.

[0036] In this embodiment, the entire automotive development process includes planning, design, prototyping, and production. The prototyping process is a crucial step in testing and verifying the early stages of automotive development. Through prototyping, significant reference value can be provided for the overall automotive development process. Therefore, the prototyping process can effectively reduce automotive development costs, shorten the development cycle, improve development quality, control development risks, and increase the probability of successful development. In existing technologies, small-batch production often uses manual hammering for edge binding, which is labor-intensive and easily damages the car body. This application includes a support assembly 10, in which an input shaft 20 and an output shaft 30 are rotatably connected. The input shaft 20 and the output shaft 30 are rotatably connected, and a spiral pressure ring 40 is fixed on the output shaft 30. The support assembly 10 is also provided with a reference block 50, which is arranged parallel to the input shaft 20. An edge binding assembly 60 is provided between one of the reference blocks 50 and the spiral pressure ring 40. By placing the edge binding assembly 60 between the spiral pressure ring 40 and the reference block 50, the edge binding assembly 60 is bound, effectively reducing the labor intensity of manual production.

[0037] In some embodiments, a bearing 70 is fixed on the support assembly 10, and the input shaft 20 and the output shaft 30 are rotatably connected to the support assembly 10 through the bearing 70.

[0038] In some embodiments, the input shaft 20 is provided with input shaft connectors 21 at both ends.

[0039] In this embodiment, a support assembly 10 is included. An input shaft 20 and an output shaft 30 are rotatably connected within the support assembly 10. The input shaft 20 and the output shaft 30 are rotatably connected. A spiral pressure ring 40 is fixed on the output shaft 30. A reference block 50 is also provided on the support assembly 10, and the reference block 50 is arranged parallel to the input shaft 20. An edge-sealing assembly 60 is provided between one of the reference blocks 50 and the spiral pressure ring 40.

[0040] The input shaft 20 has input shaft connectors 21 at both ends. Since the input shaft 20 requires external kinetic energy to rotate, this device clamps the input shaft connectors 21 with the drill chuck, allowing for kinetic energy input using the drill. Furthermore, existing drill chuck housings are made of engineering plastics, making them lightweight. Using this type of drill bit ensures machining accuracy and reduces the operator's workload. Moreover, the drill chuck has a hexagonal head at the top, which facilitates easy installation, tightening, and disassembly. Simultaneously, the hexagonal head allows the drill to achieve optimal clamping force when gripping the input shaft connectors 21. The hexagonal head of the drill chuck provides a more secure grip on the input shaft connector 21 during operation. Due to a special hardening treatment, the drill jaws possess extremely high strength, ensuring that the jaws are not damaged when the input shaft connector 21 rotates within the drill, thus guaranteeing operator safety. Therefore, this application uses a hexagonal head for the input shaft connector 21.

[0041] See Figure 3 and Figure 6 As shown, in some embodiments, a first gear 80 is fixed on the input shaft 20, and a second gear 90 is fixed on the output shaft 30. The first gear 80 meshes with the second gear 90, and the input shaft 20 is rotatably connected to the output shaft 30 through the first gear 80 and the second gear 90.

[0042] In this embodiment, a support assembly 10 is included. An input shaft 20 and an output shaft 30 are rotatably connected within the support assembly 10. The input shaft 20 and the output shaft 30 are rotatably connected. A spiral pressure ring 40 is fixed on the output shaft 30. A reference block 50 is also provided on the support assembly 10, and the reference block 50 is arranged parallel to the input shaft 20. An edge-sealing assembly 60 is provided between one of the reference blocks 50 and the spiral pressure ring 40.

[0043] The input shaft 20 is fixed with a first gear 80, and the output shaft 30 is fixed with a second gear 90. The first gear 80 and the second gear 90 mesh, and the input shaft 20 is rotatably connected to the output shaft 30 through the first gear 80 and the second gear 90. (See attached image) Figure 3As shown, the axial center points of the input shaft 20 and the output shaft 30 are on the same plane. A first gear 80 is fixed to one side of the middle of the input shaft 20, and a second gear 90 is fixed to one side of the middle of the output shaft 30. Along the same vertical plane, the first gear 80 and the second gear 90 mesh. That is, when the input shaft 20 is powered by a tool such as an electric drill, the input shaft 20 rotates under the action of the power, thereby driving the first gear 80 fixed on the input shaft 20 to rotate. When the first gear 80 rotates, since the second gear 90 is meshed with the first gear 80, the second gear 90 is also affected by the rotation of the first gear 80, and thus rotates as well. Therefore, the input shaft 20 is rotatably connected to the output shaft 30 through the first gear 80 and the second gear 90.

[0044] See Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments, the support assembly 10 includes a first support 11 and a second support 12. The first support 11 is U-shaped and the second support 12 is I-shaped. The U-shaped first support 11 and the I-shaped second support 12 are provided with support through holes 13.

[0045] In this embodiment, a support assembly 10 is included. An input shaft 20 and an output shaft 30 are rotatably connected within the support assembly 10. The input shaft 20 and the output shaft 30 are rotatably connected. A spiral pressure ring 40 is fixed on the output shaft 30. A reference block 50 is also provided on the support assembly 10, and the reference block 50 is arranged parallel to the input shaft 20. An edge-sealing assembly 60 is provided between one of the reference blocks 50 and the spiral pressure ring 40.

[0046] The support assembly 10 includes a first support 11 and a second support 12. The first support 11 is U-shaped and the second support 12 is straight. The U-shaped first support 11 and the straight second support 12 are provided with support through holes 13. One end of the input shaft 20 and the output shaft 30 are provided on the U-shaped first support 11 and the other end is provided on the straight second support 12, which is conducive to the installation and disassembly of the input shaft 20 and the output shaft 30 and provides convenience for future maintenance.

[0047] See Figure 1 , Figure 4 and Figure 5 As shown, in some embodiments, a bolt 14 is inserted into the support through hole 13, and the first support 11 and the second support 12 are connected by the bolt 14.

[0048] In this embodiment, a support assembly 10 is included. An input shaft 20 and an output shaft 30 are rotatably connected within the support assembly 10. The input shaft 20 and the output shaft 30 are rotatably connected. A spiral pressure ring 40 is fixed on the output shaft 30. A reference block 50 is also provided on the support assembly 10, and the reference block 50 is arranged parallel to the input shaft 20. An edge-sealing assembly 60 is provided between one of the reference blocks 50 and the spiral pressure ring 40.

[0049] The support assembly 10 includes a first support 11 and a second support 12. The first support 11 is U-shaped, and the second support 12 is straight. Both the U-shaped first support 11 and the straight second support 12 have support through holes 13. One end of the input shaft 20 and the output shaft 30 are located on the U-shaped first support 11, and the other end is located on the straight second support 12. Bolts 14 pass through the support through holes 13, and the first support 11 and the second support 12 are connected by the bolts 14. Specifically, support through holes 13 are provided on both sides of the U-shaped first support 11, and corresponding support through holes 13 are provided on the straight second support 12. Furthermore, threads are provided inside the support through holes 13 on both sides of the U-shaped first support 11. The bolt 14 includes a threaded rod and a threaded head. Therefore, a through hole with a diameter similar to that of the bolt 14 is provided at the support through hole 13 of the straight-line second support 12. The bolt 14 is threaded through the support through hole 13 of the straight-line second support 12 and connected to the support through holes 13 on both sides of the U-shaped first support 11. In addition, to ensure overall aesthetics, a groove is provided at the support through hole 13 of the straight-line second support 12 to hide the bolt head of the bolt 14 within the groove.

[0050] See Figure 8 , Figure 9 and Figure 10 As shown, in some embodiments, the edge-sealing assembly 60 includes an inner plate 61 and an outer plate 62.

[0051] In this embodiment, a support assembly 10 is included. An input shaft 20 and an output shaft 30 are rotatably connected within the support assembly 10. The input shaft 20 and the output shaft 30 are rotatably connected. A spiral pressure ring 40 is fixed on the output shaft 30. A reference block 50 is also provided on the support assembly 10, and the reference block 50 is arranged parallel to the input shaft 20. An edge-sealing assembly 60 is provided between one of the reference blocks 50 and the spiral pressure ring 40.

[0052] The edge-sealing assembly 60 includes an inner panel 61 and an outer panel 62, see [link / reference]. Figure 8 As shown, when the outer plate 62 contacts the lowest point of the spiral surface, it is in state one; see also Figure 9 As shown, when the outer plate 62 is between the lowest and highest points of the spiral surface, it is in state two; see also Figure 10As shown, when the outer plate 62 reaches the highest point of the spiral surface, it is in state three. Through this method, the outer plate 62 encloses the inner plate 61, effectively ensuring the quality of the edge binding.

[0053] See Figure 7 As shown, in some embodiments, the side of the spiral pressure ring 40 is provided with a spiral surface highest point 41 and a spiral surface lowest point 42.

[0054] In this embodiment, a support assembly 10 is included. An input shaft 20 and an output shaft 30 are rotatably connected within the support assembly 10. The input shaft 20 and the output shaft 30 are rotatably connected. A spiral pressure ring 40 is fixed on the output shaft 30. A reference block 50 is also provided on the support assembly 10, and the reference block 50 is arranged parallel to the input shaft 20. An edge-sealing assembly 60 is provided between one of the reference blocks 50 and the spiral pressure ring 40.

[0055] The spiral pressure ring 40 has a highest spiral point 41 and a lowest spiral point 42 on its side. By setting these points on the spiral pressure ring 40, when edge-wrapping the edge-wrapping assembly 60, the edge-wrapping assembly 60 first contacts the lowest spiral point 42, and then the spiral pressure ring 40 rotates until the highest spiral point 41 presses down on the edge-wrapping assembly 60, completing the processing of the edge-wrapping assembly 60. This method effectively increases production efficiency and ensures edge-wrapping quality.

[0056] In some embodiments, the spiral pressure ring 40 is further provided with a guide circle 43.

[0057] In this embodiment, a support assembly 10 is included. An input shaft 20 and an output shaft 30 are rotatably connected within the support assembly 10. The input shaft 20 and the output shaft 30 are rotatably connected. A spiral pressure ring 40 is fixed on the output shaft 30. A reference block 50 is also provided on the support assembly 10, and the reference block 50 is arranged parallel to the input shaft 20. An edge-sealing assembly 60 is provided between one of the reference blocks 50 and the spiral pressure ring 40.

[0058] The spiral pressure ring 40 is also provided with a guide circle 43. By setting the guide circle 43, it can be ensured that the edge-wrapping component 60 will not be damaged when it is edge-wrapped.

[0059] See Figure 1 As shown, in some embodiments, an adjustment shim 100 is provided between the reference block 50 and the support assembly 10.

[0060] In this embodiment, a support assembly 10 is included. An input shaft 20 and an output shaft 30 are rotatably connected within the support assembly 10. The input shaft 20 and the output shaft 30 are rotatably connected. A spiral pressure ring 40 is fixed on the output shaft 30. A reference block 50 is also provided on the support assembly 10, and the reference block 50 is arranged parallel to the input shaft 20. An edge-sealing assembly 60 is provided between one of the reference blocks 50 and the spiral pressure ring 40.

[0061] An adjusting shim 100 is provided between the reference block 50 and the support assembly 10. When the edge-wrapping assembly 60 is edge-wrapped, the gap between the highest point 41 of the spiral surface of the spiral pressure ring 40 and the reference block 50 on the same side of the spiral pressure ring 40 is adjusted according to the thickness of the parts of the edge-wrapping assembly 60 to be edge-wrapped. The size of the gap during adjustment is calculated by adding twice the thickness of the edge-wrapping assembly 60. During adjustment, the adjusting shim 60 is added or subtracted as needed to achieve the gap between the reference block 50 and the spiral pressure ring 40.

[0062] The operation method of this invention is as follows:

[0063] 1. Assemble all parts of the device and apply lubricating oil to the moving parts;

[0064] 2. Adjust the gap between the highest point 41 of the spiral surface and the reference block 50 according to the thickness of the edge-binding component 60. The gap size during adjustment is calculated by adding the thickness of the inner plate 61 to twice the thickness of the outer plate 62.

[0065] 3. When the gap between the highest point 41 of the spiral surface and the reference block 50 is too large or too small, adjust the gap between the highest point 41 of the spiral surface and the reference block 50 by adjusting the adjusting shim 100.

[0066] 4. After adjustment, use a test piece to check the quality of the edging. If the gap between the highest point 41 of the spiral surface and the reference block 50 is not properly adjusted, adjust it through step 3 until the quality of the edging is qualified.

[0067] 5. Place the outer panel 62 under the inner panel 61;

[0068] 6. Place the outer plate 62 and the inner plate 61 in the gap between the spiral surface pressure ring 40 and the reference block 50, and set the highest point 41 of the spiral surface at the bottom.

[0069] 7. The operator uses a drive device (such as an electric wrench) to drive the gear shaft to rotate the input shaft 20. The first gear 80 of the input shaft 20 drives the second gear 90 to rotate, thereby driving the output shaft 30 to rotate.

[0070] 8. The output shaft 30 drives the spiral pressure ring 40 to rotate;

[0071] 9. The highest point 41 of the spiral surface of the spiral pressure ring 40 rotates from bottom to top, and the change in the gap between the spiral pressure ring 40 and the reference block 50 is used to squeeze the edge-sealing assembly 60 until the outer plate 62 covers the inner plate 61.

[0072] 9. Complete the edging.

[0073] The beneficial effects of this invention are as follows:

[0074] 1. The gap between the highest point of the spiral surface and the reference block in this application is adjustable, enabling edge wrapping of components with different thicknesses;

[0075] 2. The edge-binding process has been optimized. By rotating the spiral pressure ring and pressing along the edge-binding component in a straight line, the edge-binding efficiency has been improved.

[0076] 3. Suitable for small-batch production of parts such as prototypes and non-standard parts;

[0077] 4. The structure is reasonably designed, the size is small, and the operation is simple;

[0078] 5. Increased production efficiency and reduced production costs.

[0079] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Unless otherwise expressly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0080] It should be noted that, in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the term "comprising," or any other variation thereof, is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0081] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.

Claims

1. A hand-held mobile spiral hemming mechanism, characterized in that, The application relates to a bearing assembly (10) which is internally connected with an input shaft (20) and an output shaft (30), the input shaft (20) is connected with the output shaft (30), the output shaft (30) is fixed with a spiral surface pressure ring (40), the side surface of the spiral surface pressure ring (40) is provided with a spiral surface highest point (41) and a spiral surface lowest point (42), the spiral surface pressure ring (40) is further provided with a guide circle (43), the bearing assembly (10) is further provided with a reference block (50), the reference block (50) is arranged in parallel with the input shaft (20), adjusting shims (100) are arranged between the reference block (50) and the bearing assembly (10), and one of the reference blocks (50) and the spiral surface pressure ring (40) are provided with a covering assembly (60).

2. A hand-held mobile spiral hemming mechanism as claimed in claim 1, characterized in that, The bearing assembly (10) is fixed with a bearing (70), and the input shaft (20) and the output shaft (30) are rotatably connected with the bearing assembly (10) through the bearing (70).

3. A hand-held mobile spiral hemming mechanism as claimed in claim 1, wherein, The input shaft (20) is provided with an input shaft connecting head (21) at both ends.

4. A hand-held mobile spiral hemming mechanism as claimed in claim 1, wherein, The input shaft (20) is fixed with a first gear (80), the output shaft (30) is fixed with a second gear (90), the first gear (80) is engaged with the second gear (90), and the input shaft (20) is rotatably connected with the output shaft (30) through the first gear (80) and the second gear (90).

5. A hand-held mobile spiral hemming mechanism as claimed in claim 1, wherein, The bearing assembly (10) comprises a first bearing (11) and a second bearing (12), the first bearing (11) is in the shape of a Chinese character 'fang', the second bearing (12) is in the shape of a Chinese character 'yi', the first bearing (11) in the shape of a Chinese character 'fang' and the second bearing (12) in the shape of a Chinese character 'yi' are provided with bearing through holes (13).

6. A hand-held, mobile spiral edge wrapping mechanism as claimed in claim 5, characterized in that The bearing through holes (13) are penetrated by bolts (14), and the first bearing (11) and the second bearing (12) are connected through the bolts (14).

7. A hand-held mobile spiral edge wrapping mechanism as claimed in claim 1, wherein, The covering assembly (60) comprises an inner plate (61) and an outer plate (62).

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