Reel components

Abstract

The present invention relates to a reel assembly, which can be arranged in a webbing retractor or a wheelchair fastener of a safety belt system to bear the load of webbing tensioning. The reel assembly includes a shaft rod, a shaft tube coaxially sleeved on the outside of the shaft rod, and two ratchet gears respectively fixed to the axial ends of the combination of the shaft rod and the shaft tube. The wheel plate parts of the two ratchet gears are each provided with a reinforcing support structure between the shaft rod and the shaft tube, and the reinforcing support structure is offset relative to the inner plate surface of the wheel plate part, extending along the inner plate surface and perpendicular to the reference plane of the shaft rod through the reinforcing support structure, so that the reinforcing support structure can reinforce the fixed part between the end of the shaft tube and the ratchet gear. When the shaft tube bears the load when the webbing is tensioned, the load can be effectively distributed on a larger cross-section, reducing the stress per unit area of ​​the fixed part between the ratchet gear and the shaft tube, thereby improving the mechanical strength of the reel assembly and being able to withstand higher loads.

Description

Technical Field

[0001] The present invention relates to a webbing retractor for a safety belt system or a wheelchair fastener for a heavy wheelchair, and in particular to a reel assembly for connecting a webbing in the webbing retractor or the wheelchair fastener. Background Art

[0002] In a vehicle's seatbelt system, to ensure the safety of the driver or passengers, the webbing attached to the driver or passenger is connected to a webbing retractor. In an emergency, the webbing attached to the reel assembly of the webbing retractor is locked, causing the webbing to be tensioned and secure the driver or passenger's body.

[0003] In the existing webbing retractor, the reel assembly used to connect the webbing and locked by the brake assembly, such as Figures 8 to 10 As shown, its structure includes a shaft 60, a shaft tube 70 coaxially sleeved on the outside of the shaft 60, and two ratchet gears 80 fixed to the axial ends of the shaft 60 and shaft tube 70 combination. The shaft tube 70 is connected to the webbing, and the ratchet gears 80 can be locked and unlocked by a brake assembly. Conventional webbing retractors are used in seatbelt systems in general motor vehicles to provide safety protection for drivers and passengers. The mechanical strength of the reel assembly in the webbing retractor can meet the load requirements imposed by the webbing on the shaft tube.

[0004] However, when the existing reel assembly is used as a wheelchair fastener for heavy wheelchairs with high loads in transportation vehicles, especially during a collision, the mechanical strength of the existing reel assembly is insufficient and it is prone to failure. Because the webbing connected to the shaft tube of the reel assembly is in a stressed and tensioned state, the loads applied by the webbing to the shaft tube include radial load, linear load, torque and bending, etc. Figure 11 and Figure 12 As shown, the radial load acting on the shaft tube 70 of the reel assembly at different positions is shown, wherein the radial force is borne by the shaft tube 70 itself and the fixed protrusion 71 of the ratchet gear 80 fixed to its end; Figure 13 and Figure 14 As shown, it shows the linear load acting on the shaft tube 70 of the reel assembly at different positions, wherein the linear force is jointly borne by the combination of the shaft rod 60 and the fixing protrusion 71 of the shaft tube 70; Figure 15 As shown, the torque state acting on the shaft tube 70 of the reel assembly is shown, and the torque load is borne by the fixed protrusion 71 of the shaft tube 70; Figure 16 FIG. 1 shows a state in which the shaft tube 70 of the reel assembly is subjected to a bending load.

[0005] From the above, it can be seen that the stress generated by the radial force applied to the reel assembly on the fixed tab connected to the ratchet gear at the end of the shaft tube is different from the stress generated by the linear force on the fixed tab connected to the ratchet gear at the end of the shaft tube. Figure 11 and Figure 12 As shown, the shear stress generated by the radial force on the shaft tube 70 is uniformly distributed along the periphery of the shaft tube 70. The exception is that most existing shaft tubes 70 use seamed pipes, and the areas with greater stress are located at both ends of the shaft tube 70 facing the axial gap 72.

[0006] As for the shear stress generated by the linear force on the shaft tube, it is mainly located on the side opposite to the direction of the tension applied by the webbing on the shaft tube. Figure 13 and Figure 14 As shown in FIG, when the pulling force is directed upward, the shear stress is located in the lower half of the shaft tube, and the shear stress varies with the distance between the position of the axial gap of the shaft tube and the webbing, as shown in FIG. Figure 13 The lower half of the shaft tube shown is supported by two fixed protrusions, and each fixed protrusion is subjected to a large stress, such as Figure 14 The lower half of the shaft tube shown is supported by three fixing lugs, and each fixing lug is subjected to relatively small stress.

[0007] From the stress analysis description of the reel assembly under the aforementioned webbing tensioning state, it can be seen that the fixed connection structure between the fixed protrusions at the axial ends of the shaft tube and the wheel plate portion of the ratchet gear plays a very important role in whether the mechanical strength of the reel assembly is sufficient to withstand the load.

[0008] However, according to the composition structure of the existing reel assembly, after the multiple fixing protrusions at the end of the shaft tube are riveted and fixed to the wheel plate portion of the ratchet gear, the connection portion between the main body of the shaft tube and the fixing protrusions at both ends of the axial direction cannot obtain substantial support. Even if the fixing protrusions riveted on the ratchet gear are further welded to the outer plate surface of the wheel plate portion by welding, the ratchet gear still only supports the fixing protrusions at the radial position of the support portion of the wheel plate portion between the shaft rod and the fixing protrusions of the shaft tube. Figure 10 As shown, the securing tab acting on the shaft tube is located at the shear line L1 between the inner panel and the support portion, perpendicular to the central axis of the shaft, resulting in a relatively small cross-sectional area subjected to the load. Therefore, when the conventional reel assembly is used in a wheelchair fastener for a heavy wheelchair subject to high loads, the load exerted on the shaft tube of the conventional reel assembly by the tensioned webbing due to the heavy wheelchair's load can easily result in excessive stress per unit area between the ratchet gear and the fastening portion of the shaft tube. This can lead to the conventional reel assembly's mechanical strength being insufficient to withstand the high loads exerted by the heavy wheelchair, resulting in deformation or breakage of the wheelchair fastener's reel assembly. Therefore, improvements to the reel assembly's structure are necessary. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a reel assembly to solve the technical problem that the mechanical strength of the reel assembly of the existing webbing retractor is difficult to withstand high loads in a transportation vehicle as a mechanism for restraining and fixing heavy wheelchairs.

[0010] The technical solution proposed by the present invention is to provide a reel assembly, which includes a shaft, a shaft tube and two ratchet gears. The shaft tube is coaxially sleeved on the outer side of the shaft, with a gap between the inner peripheral wall of the shaft tube and the outer peripheral wall of the shaft. The two ratchet gears include a wheel plate portion and a plurality of ratchet teeth arranged around the periphery of the wheel plate portion. The wheel plates of the two ratchet gears are respectively passed through the axial ends of the connection between the shaft and the shaft tube, and the wheel plates of the two ratchet gears are fixedly connected. The wheel plates of the two ratchet gears have an inner plate surface on one side facing each other and an outer plate surface on the other side.

[0011] The wheel plate portion of the two ratchet gears each has a reinforcing support structure, and the reinforcing support structure is riveted from the outer plate surface of the wheel plate portion into between the outer peripheral wall of the shaft rod and the inner peripheral wall of the shaft tube. The reinforcing support structure is offset from the inner plate surface, and the two ratchet gears extend respectively along the inner plate surface and a reference plane perpendicular to the central axis of the shaft rod passes through the reinforcing support structure.

[0012] In the reel assembly described above, the reinforcing support structure is a support ring body surrounding the outer periphery of the shaft, and a side surface of the support ring body facing the middle direction of the shaft tube is offset relative to the inner plate surface of the wheel plate portion.

[0013] In the reel assembly as described above, a plurality of fixed protrusions are formed at both axial ends of the shaft tube and arranged at intervals; the wheel plate portion of the two ratchet gears has a central shaft hole located at the center position of the wheel plate portion, a support area located outside the central shaft hole, and a plurality of fixed holes distributed around the support area, the hole edges of the plurality of fixed holes are adjacent to the outer peripheral edges of the support area, the two ends of the shaft rod are respectively passed through and fixedly connected to the central shaft holes of the two ratchet gears, the multiple fixed protrusions at both ends of the shaft tube are respectively passed through and fixedly connected to the fixed holes corresponding to the positions in the two ratchet gears, and the support ring body of the reinforced support structure is located in the support area and adjacent to the shaft rod and the fixed protrusions of the shaft tube.

[0014] In the reel assembly as described above, the reinforced support structure includes a plurality of support blocks distributed on the periphery of the shaft, each of the support blocks faces a side surface in the middle direction of the shaft tube and is offset relative to the inner plate surface of the wheel plate portion, and each of the support blocks abuts the shaft and the shaft tube.

[0015] In the reel assembly as described above, a plurality of fixed protrusions are formed at both axial ends of the shaft tube and arranged at intervals; the wheel plate portion of the two ratchet gears has a central shaft hole located at the center position of the wheel plate portion, a support area located around the central shaft hole, and a plurality of fixed holes distributed around the support area, the hole edges of the plurality of fixed holes are adjacent to the outer peripheral edges of the support area, the two ends of the shaft rod are respectively passed through and fixedly connected to the central shaft holes of the two ratchet gears, the multiple fixed protrusions at both ends of the shaft tube are respectively passed through and fixedly connected to the fixed holes corresponding to the positions in the two ratchet gears, and each of the support blocks of the reinforced support structure is located in the support area and respectively located between the fixed protrusion corresponding to the position of the shaft tube and the shaft rod.

[0016] In the reel assembly as described above, the outer peripheral surface of the shaft tube forms a non-slip surface.

[0017] When the reel assembly of the present invention is applied to a webbing retractor of a safety belt system or a wheelchair anchor of a heavy wheelchair, the beneficial effects achieved are as follows:

[0018] 1. Possessing mechanical strength capable of withstanding high loads: The reel assembly of the present invention utilizes ratchet gears at both axial ends of a coaxially arranged shaft and shaft tube combination to set a reinforcing support structure in the section between the wheel plate portion where the shaft tube and the shaft are fixed. The reinforcing support structure is offset relative to the inner plate surface of the ratchet gear, and a reference plane extending along the inner plate surface and perpendicular to the central axis of the shaft rod passes through the structure of the reinforcing support structure, thereby effectively distributing the load acting on the shaft tube over a larger cross-section, reducing the stress per unit area between the ratchet gear and the shaft tube, and enabling the reel assembly to have the mechanical strength capable of withstanding higher loads.

[0019] 2. It is easy to complete the reinforced support structure in the reel assembly process: As mentioned above, the reel assembly of the present invention is formed by using two ratchet gears to set up reinforced support structures in the parts between the fixed shaft tube and the shaft rod, and the reinforced support structure is offset relative to the inner plate surface of the ratchet gear. Therefore, the reinforced support structure can be completed by the riveting means of the punch press in the fixed processing step of riveting the ratchet gear and the shaft rod and the axial end of the shaft tube. Therefore, the reinforced support structure can be easily completed in the reel assembly process.

[0020] The reel assembly of the present invention can further utilize the outer peripheral surface of the shaft tube to form a rough anti-slip surface to ensure the stability of the connection between the shaft tube and the end of the ribbon, so that the ribbon can apply load to the shaft tube in a flat and uniform state. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 : Schematic end view of a first preferred embodiment of the reel assembly of the present invention.

[0022] Figure 2 : Figure 1The schematic diagram of the partial cross-section of the first preferred embodiment of the reel assembly is shown in a side view at the position of the cutting plane line AA.

[0023] Figure 3 : Figure 2 A partial enlarged schematic diagram.

[0024] Figure 4 : Schematic end view of a second preferred embodiment of the reel assembly of the present invention.

[0025] Figure 5 : Figure 4 The second preferred embodiment of the reel assembly is shown as a side cross-sectional schematic diagram at the position of the cutting plane line BB.

[0026] Figure 6 : Figure 5 A partial enlarged schematic diagram.

[0027] Figure 7 : Reference diagram showing the usage of a webbing retractor having a reel assembly according to the present invention for restraining and fixing a heavy wheelchair.

[0028] Figure 8 : Schematic end view of the existing reel assembly.

[0029] Figure 9 : Figure 8 A schematic side cross-sectional view of a conventional reel assembly at the position of cutting line CC.

[0030] Figure 10 : Figure 9 A partial enlarged schematic diagram.

[0031] Figure 11 : Schematic diagram of radial loads acting on the shaft tube of an existing reel assembly at different positions (a).

[0032] Figure 12 : Schematic diagram of radial loads acting on the shaft tube of an existing reel assembly at different positions (II).

[0033] Figure 13 : Schematic diagram of the linear load acting on the shaft tube of the existing reel assembly at different positions (I).

[0034] Figure 14 : Schematic diagram of the linear load acting on the shaft tube of the existing reel assembly at different positions (2).

[0035] Figure 15 : Schematic diagram of the torque conditions acting on the shaft tube of the existing reel assembly.

[0036] Figure 16 : Schematic diagram showing the state in which the shaft tube of a conventional reel assembly is subjected to a bending load.

[0037] Brief description of the figures:

[0038] 1: Scroll assembly

[0039] 10: shaft

[0040] 100: Central axis

[0041] 20: shaft tube

[0042] 21: fixed convex part

[0043] 22: Anti-slip surface

[0044] 30: Ratchet gear

[0045] 31: wheel plate

[0046] 31a: Inner panel

[0047] 31b: Outer panel

[0048] 310: Reference plane

[0049] 311: Center shaft hole

[0050] 312: Support Zone

[0051] 313: Fixed hole

[0052] 32: Ratchet

[0053] 33A: Strengthen support structure

[0054] 33B: Strengthened support structure

[0055] 331: Support ring

[0056] 332: Support block

[0057] d1: The offset distance between the side of the support ring body facing the center of the shaft and the inner plate surface of the wheel plate

[0058] d2: The offset distance between the side of the support block facing the center of the shaft and the inner surface of the wheel plate

[0059] L: shear line

[0060] 2: Heavy wheelchair

[0061] 3: Wheelchair fastener

[0062] 4: Adjustable fixing mechanism

[0063] 5: Ribbon

[0064] L1: shear line

[0065] 60: shaft

[0066] 70: shaft tube

[0067] 71:Fixing tab

[0068] 72: Axial gap

[0069] 80: Ratchet

[0070] 90: Ribbon DETAILED DESCRIPTION

[0071] The following further describes the technical means adopted by the present invention to achieve the predetermined purpose of the invention in conjunction with the drawings and preferred embodiments of the present invention.

[0072] like Figure 1 and Figure 4 , which respectively disclose several preferred embodiments of the reel assembly 1 of the present invention. As can be seen from these drawings, the reel assembly 1 includes a shaft 10 , a shaft tube 20 and two ratchet gears 30 .

[0073] like Figures 1 to 3 as well as Figures 4 to 6 As shown, the shaft 10 is a circular rod of a predetermined length, and has a central axis 100 extending along the length direction of the shaft 10 .

[0074] like Figures 1 to 3 as well as Figures 4 to 6 As shown, the shaft tube 20 is a circular tube of predetermined length, coaxially sleeved around the shaft 10. The inner diameter of the shaft tube 20 is larger than the outer diameter of the shaft 10. A spacing is defined between the inner circumferential wall of the shaft tube 20 and the outer circumferential wall of the shaft 10, which is determined based on the actual product requirements of the reel assembly 1. A plurality of spaced-apart fixing tabs 21 are formed at each axial end of the shaft tube 20.

[0075] like Figure 1 and Figure 4 In the preferred embodiment shown, the shaft tube 20 is a circular seam tube formed by bending a metal plate. An axially extending gap is formed in the seam tube. Therefore, the spacing between two adjacent fixing protrusions 21 adjacent to the shaft tube 20 located at the axially extending gap is relatively wide, while the spacing between the other two adjacent fixing protrusions 21 is relatively narrow. Figure 2 In the preferred embodiment shown, the shaft tube 20 may also form a roughened anti-slip surface 22 on its outer peripheral surface to enhance the stability of the connection between the outer peripheral wall of the shaft tube 20 and the webbing, so that the webbing can apply a load to the shaft tube 20 in a flat and uniform state.

[0076] like Figures 1 to 3 as well as Figures 4 to 6As shown, the two ratchet gears 30 are respectively fixed to the axial ends of the combination of the shaft tube 20 and the shaft rod 10, and the two ratchet gears 30 include a wheel plate portion 31 and a plurality of ratchet teeth 32 arranged around the periphery of the wheel plate portion 31. The side surfaces of the wheel plate portions 31 of the two ratchet gears 30 facing each other are defined as an inner plate surface 31a, and the other side surface of the wheel plate portion 31 is an outer plate surface 31b. The inner plate surface 31a is perpendicular to the central axis 100 of the shaft rod 10, and the two ratchet gears 30 are respectively defined as extending along the inner plate surface 31a and perpendicular to the center axis 100 of the shaft rod 10. A reference plane 310 is perpendicular to the central axis 100 of the shaft 10. The wheel plate portion 31 of the two ratchet gears 30 each has a reinforcing support structure 33A, 33B. The reinforcing support structures 33A, 33B are riveted from the outer plate surface 31b of the wheel plate portion 31 into between the outer peripheral wall of the shaft 10 and the inner peripheral wall of the shaft tube 20. The reinforcing support structures 33A, 33B are offset from the inner plate surface 31a, and the reference plane 310 passes through the reinforcing support structures 33A, 33B respectively.

[0077] like Figure 3 and Figure 6 As shown, the reel assembly 1 of the present invention utilizes the reinforcing support structures 33A and 33B to offset the inner plate surface 31a of the ratchet gear 30. The reference plane 310 extending along the inner plate surface 31a and perpendicular to the central axis 100 of the shaft 10 passes through the structure of the reinforcing support structures 33A and 33B, so that the shear line L of the fixed protrusion portion 21 acting on the shaft tube 20 is located between the inner plate surface 31a and the inner side surface extending from the reinforcing support structures 33A and 33B, and the cross-section is enlarged. Therefore, the load acting on the shaft tube 20 can be effectively distributed on a larger cross-section, thereby reducing the stress per unit area between the ratchet gear 30 and the shaft tube 20. Compared with the existing reel assembly 1, the reel assembly 1 of the present invention has mechanical strength that can withstand higher loads.

[0078] Based on the aforementioned inventive concept, the reinforcing support structures 33A, 33B of the reel assembly 1 of the present invention can be implemented in a variety of specific feasible embodiments. To facilitate the description of the technical features of the reel assembly 1 of the present invention, the following description is made in conjunction with the preferred embodiments disclosed in the drawings, but is not limited thereto.

[0079] like Figures 1 to 3 as well as Figures 4 to 6In the preferred embodiment shown, the wheel plate portion 31 of the second ratchet gear 30 has a central axis hole 311 located at the center position of the wheel plate portion 31, a support area 312 located around the outer periphery of the central axis hole 311, and a plurality of fixing holes 313 distributed around the outer periphery of the support area 312, the inner hole edges of the plurality of fixing holes 313 are adjacent to the outer periphery of the support area 312, the two ends of the shaft rod 10 are respectively passed through and fixedly connected to the central axis hole 311 of the second ratchet gear 30, and the multiple fixing protrusions 21 at the two ends of the shaft tube 20 are respectively passed through and fixedly connected to the fixing holes 313 corresponding to the positions in the second ratchet gear 30.

[0080] like Figures 1 to 3 In the preferred embodiment shown, the reinforcing support structure 33A includes a support ring 331 surrounding the periphery of the shaft 10 and located in the support area 312 between the shaft 10 and the fixing protrusions 21 of the shaft tube 20. The support ring 331 is offset relative to the inner plate surface 31a of the wheel plate portion 31. The central shaft hole 311 is located in the support ring 331 and offset to the side of the fixing hole 313 toward the center of the shaft 10. The support ring 331 abuts against each of the fixing protrusions 21 of the shaft 10 and the shaft tube 20. The side of the support ring 331 facing the center of the shaft 10 is offset by a distance d1 relative to the inner plate surface 31a of the wheel plate portion 31.

[0081] like Figures 4 to 6 In another preferred embodiment shown, the reinforcing support structure 33B includes a plurality of support blocks 332 distributed in a support area 312 peripheral to the central shaft hole 311. Each support block 332 is offset relative to the inner plate surface 31a of the wheel plate portion 31. Each support block 332 is located in the support area 312 and between the corresponding fixing tab 21 of the shaft tube 20 and the shaft rod 10. Preferably, the support block 332 abuts the corresponding fixing tab 21 of the shaft rod 10 and the shaft tube 20. The side of the support block 332 facing the center of the shaft rod 10 is offset by a distance d2 relative to the inner plate surface 31a of the wheel plate portion 31.

[0082] As described above, the invention of the reel assembly 1 can significantly enhance the mechanical strength of the reel assembly 1 as a whole, so that it can be used not only in the seat belt system of a vehicle, but also in the webbing retractor for personal safety protection of the driver or passengers, such as Figure 3 and Figure 6As shown, when the ratchet gear 30 in the reel assembly 1 is locked by the brake in the webbing retractor, the webbing attached to the human body is in a tensioned state, and the shaft tube 20 connected to the webbing has a reinforced support structure 33A, 33B provided on the wheel plate portion 31 of the ratchet gear 30. This can effectively distribute the load acting on the shaft tube 20 over a larger cross-section, thereby reducing the stress per unit area between the ratchet gear 30 and the shaft tube 20, so that the reel assembly 1 has the mechanical strength to withstand higher loads, which is far greater than the safety requirements of the webbing retractor of the seat belt system.

[0083] In addition, the reel assembly 1 of the present invention can also be used in transportation vehicles (such as welfare vehicles such as rehabilitation buses, or other public transportation vehicles that can transport wheelchairs for people, etc.) to provide a wheelchair holder 3 for fixing a heavy wheelchair 2 with a high load. Figure 7 As shown, a wheelchair anchor 3 with a reel assembly is mounted on the floor of the transport vehicle using a fixed or adjustable securing mechanism 4. The webbing connected to the reel assembly 1 extends from the housing of the wheelchair anchor 3. The hook at the end of the webbing 5 hooks onto the seat frame of the heavy-duty wheelchair 2, securing the heavy-duty wheelchair 2 securely to the floor of the transport vehicle using a set of wheelchair anchors 3 on each of its front and rear ends. As the heavy-duty wheelchair 2 travels along the transport vehicle, the four sets of wheelchair anchors 3 distributed around the wheelchair 2 provide balanced and stable traction, ensuring that the heavy-duty wheelchair 2 does not move on the floor of the transport vehicle.

[0084] When the heavy wheelchair is subjected to force, the webbing 5 connecting the heavy wheelchair 2 is in a tensioned state due to the force, and a high load is generated on the reel assembly in the wheelchair holder 3 through the webbing 5. Figure 3 and Figure 6 As shown, the reel assembly 1 of the present invention utilizes the reinforced support structures 33A and 33B to offset the inner plate surface 31a of the ratchet gear 30, and the reference plane 310 extending along the inner plate surface 31a and perpendicular to the central axis 100 of the shaft 10 passes through the structure of the reinforced support structures 33A and 33B, so that the shear line L of the fixed protrusion portion 21 acting on the shaft tube 20 is located between the inner plate surface 31a and the inner side surface extending from the reinforced support structures 33A and 33B, and the cross section is expanded, which effectively distributes the load acting on the shaft tube 20 over a larger cross section, reduces the stress per unit area between the fixed connection portion of the ratchet gear 30 and the shaft tube 20, and makes the mechanical strength of the reel assembly 1 sufficient to withstand the high load generated by the force of a heavy wheelchair.

[0085] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the present profession can make some changes or modifications to equivalent embodiments of the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A reel assembly comprising a shaft, a shaft tube, and two ratchet gears, the shaft tube being coaxially sleeved on the outside of the shaft, with a gap between the inner circumferential wall of the shaft tube and the outer circumferential wall of the shaft, the two ratchet gears comprising a wheel plate portion and a plurality of ratchet teeth arranged around the circumference of the wheel plate portion, the wheel plates of the two ratchet gears being fixedly connected to the two ratchet gears being respectively penetrated by the axial ends of the connection between the shaft and the shaft tube, the wheel plates of the two ratchet gears having an inner plate surface on one side facing each other and an outer plate surface on the other side, characterized in that: The wheel plate portion of the two ratchet gears each has a reinforcing support structure, and the reinforcing support structure is riveted from the outer plate surface of the wheel plate portion into between the outer peripheral wall of the shaft and the inner peripheral wall of the shaft tube. The reinforcing support structure is offset from the inner plate surface, and the two ratchet gears extend respectively along the inner plate surface and a reference plane perpendicular to the central axis of the shaft passes through the reinforcing support structure.

2. The reel assembly according to claim 1, wherein: The reinforcing support structure comprises a supporting ring body surrounding the outer periphery of the shaft rod, and a side surface of the supporting ring body facing the middle direction of the shaft tube is offset relative to the inner plate surface of the wheel plate portion.

3. The reel assembly according to claim 2, wherein: The axial ends of the shaft tube are respectively formed with a plurality of fixed protrusions arranged at intervals; the wheel plate portion of the two ratchet gears has a central shaft hole located at the center position of the wheel plate portion, a support area located around the outside of the central shaft hole, and a plurality of fixed holes distributed around the outside of the support area, the inner hole edges of the plurality of fixed holes are adjacent to the outer peripheral edges of the support area, the two ends of the shaft rod are respectively passed through and fixedly connected to the central shaft holes of the two ratchet gears, the plurality of fixed protrusions at the two ends of the shaft tube are respectively passed through and fixedly connected to the fixing holes corresponding to the positions in the two ratchet gears, the support ring body of the reinforced support structure is located in the support area and adjacent to the shaft rod and the fixed protrusions of the shaft tube.

4. The reel assembly according to claim 1, wherein: The reinforced support structure includes a plurality of support blocks distributed on the periphery of the shaft, each of the support blocks faces a side surface in the middle direction of the shaft tube and is offset relative to the inner plate surface of the wheel plate portion, and each of the support blocks abuts the shaft rod and the shaft tube.

5. The reel assembly according to claim 4, wherein: The axial ends of the shaft tube are respectively formed with a plurality of fixed protrusions arranged at intervals; the wheel plate portion of the two ratchet gears has a central shaft hole located at the center position of the wheel plate portion, a support area located around the outside of the central shaft hole, and a plurality of fixed holes distributed around the outside of the support area, the inner hole edges of the plurality of fixed holes are adjacent to the outer peripheral edges of the support area, the two ends of the shaft rod are respectively passed through and fixedly connected to the central shaft holes of the two ratchet gears, the multiple fixed protrusions at the two ends of the shaft tube are respectively passed through and fixedly connected to the fixing holes corresponding to the positions in the two ratchet gears, and each of the support blocks of the reinforced support structure is located in the support area and respectively located between the fixed protrusions corresponding to the positions of the shaft tube and the shaft rod.

6. The reel assembly according to any one of claims 1 to 5, characterized in that The outer peripheral surface of the shaft tube forms a non-slip surface.

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