A telescopic flywheel drive frame

Abstract

This utility model discloses a retractable flywheel transmission frame, relating to the field of flywheel technology. The utility model includes a cassette-type hub base and a cassette-type flywheel body. An inner cavity is formed near one side of the cassette-type hub base. A U-shaped seat is symmetrically fixedly connected to the side wall of the inner cavity near its center. A diagonal rod is rotatably connected between the two inner walls of the U-shaped seat, and the two diagonal rods are symmetrically distributed. A positioning shaft is symmetrically slidably inserted into the outer ring of the cassette-type hub base near the center of the inner cavity. A miniature auxiliary wheel is fixedly connected to the bottom end of the positioning shaft, and the miniature auxiliary wheel cooperates with the diagonal rod. In this utility model, a rotating block drives a lead screw to rotate, thereby causing the sliding block to move horizontally. Under the cooperation of the connecting rod and the diagonal rod, and the action of the miniature auxiliary wheel, the positioning shaft rises and moves out of the cassette-type hub base to complete the limit position, enabling rapid disassembly of the cassette-type flywheel body and improving disassembly efficiency.

Description

Technical Field

[0001] This utility model relates to the field of flywheel technology, specifically a retractable flywheel transmission frame. Background Technology

[0002] In the field of bicycles, electric vehicles and other transportation vehicles and related equipment that use the freewheel as the core transmission component, cassette freewheels have been widely used due to their significant advantages such as compact structure, high transmission efficiency and convenient gear shifting. A cassette freewheel is usually composed of multiple gears with different numbers of teeth stacked in sequence and tightly connected to the hub through a specific buckle structure to achieve switching between different transmission ratios and meet diverse riding needs. In the Chinese patent with publication number CN220430402U entitled "A combined transmission mechanism for a motor and a flywheel", the main body of the structural transmission mechanism uses the extension and retraction of the limiting spring block to realize the disassembly and assembly of the card flywheel. This effectively overcomes the defects of the existing card flywheel's threaded flywheel cover, which suffers from high thread mechanical wear and is prone to stripping after repeated disassembly and assembly of the flywheel. When using the above-mentioned equipment, a spring is used to drive the limit block to lift and lower, thereby realizing the disassembly of the card flywheel. However, after a long period of use, the spring is prone to deformation (elastic fatigue), which leads to the instability of the subsequent force provided. This makes it difficult to guarantee the positional accuracy of the limit block during the lifting and lowering process. In order to solve the above problems, the inventor proposed a telescopic flywheel transmission frame. Utility Model Content

[0003] To address the problem that springs are prone to deformation after prolonged use, leading to unstable subsequent force delivery, this invention aims to provide a retractable flywheel transmission frame.

[0004] To solve the above technical problems, the present invention adopts the following technical solution: a retractable flywheel transmission frame, including a cassette-type hub base and a cassette-type flywheel body. The cassette-type hub base has an inner cavity near one side. A U-shaped seat is symmetrically fixedly connected to the side wall of the inner cavity near the center. An inclined rod is rotatably connected between the two inner walls of the U-shaped seat, and the two inclined rods are symmetrically distributed. A positioning shaft is symmetrically slidably inserted into the outer ring of the cassette-type hub base near the center of the inner cavity. A micro auxiliary wheel is fixedly connected to the bottom end of the positioning shaft, and the micro auxiliary wheel cooperates with the inclined rod. A positioning plate is fixedly connected to the side end of the cassette-type flywheel body. A limiting groove adapted to the positioning shaft is symmetrically opened near the center of the side end of the positioning plate, and the limiting groove and the positioning shaft are on the same horizontal plane.

[0005] Preferably, a lead screw is rotatably connected at the center between the inner walls on both sides of the inner cavity, and positioning rods are symmetrically fixed between the inner walls on both sides of the inner cavity and near the lead screw.

[0006] Preferably, a sliding block is slidably connected between the two positioning rods, and the sliding block is threadedly rotatably connected to the lead screw. Connecting rods are symmetrically rotatably connected to both ends of the sliding block, and the connecting rods are rotatably connected to the inclined rod.

[0007] Preferably, a rotating block is rotatably connected at the center of the side end of the cassette hub base, and the side end of the rotating block passes through the cassette hub base and is fixedly connected to the lead screw.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. In this utility model, the rotating block drives the lead screw to rotate, thereby causing the sliding block to move horizontally. With the cooperation of the connecting rod and the inclined rod, as well as the action of the micro auxiliary wheel, the positioning shaft moves upward and moves out of the cassette-type speed change hub base to complete the limit position. This enables the quick disassembly of the cassette-type flywheel body and improves disassembly efficiency. 2. By setting up connecting rods and diagonal rods in this utility model, compared with spring-loaded components, the service life of the device can be extended, and the operating cost and maintenance frequency can be reduced. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0011] Figure 2 This is a schematic diagram of the internal cavity structure of this utility model.

[0012] Figure 3 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0013] Figure 4 This utility model Figure 2 Enlarged structural diagram at point B.

[0014] In the diagram: 1. Cassette hub base; 11. Inner cavity; 2. Cassette flywheel body; 21. Positioning plate; 22. Limiting groove; 3. U-shaped seat; 31. Diagonal bar; 4. Positioning shaft; 41. Miniature auxiliary wheel; 42. Lead screw; 43. Sliding block; 44. Connecting rod; 45. Positioning rod; 46. Rotating block. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example: Figure 1-4 As shown, this utility model provides a technical solution: a retractable flywheel transmission frame, including a cassette-type hub base 1 and a cassette-type flywheel body 2. The cassette-type hub base 1 has an inner cavity 11 near one side. A U-shaped seat 3 is symmetrically fixedly connected to the side wall of the inner cavity 11 near the center. Diagonal rods 31 are rotatably connected between the two inner walls of the U-shaped seat 3, and the two diagonal rods 31 are symmetrically distributed. A positioning shaft 4 is symmetrically slidably inserted into the outer ring of the cassette-type hub base 1 near the center of the side of the inner cavity 11. A miniature auxiliary wheel 41 is fixedly connected to the bottom end of the positioning shaft 4, and the miniature auxiliary wheel 41 cooperates with the diagonal rods 31. A positioning disc 21 is fixedly connected to the side end of the cassette-type flywheel body 2. A limiting groove 22, adapted to the positioning shaft 4, is symmetrically opened near the center of the side end of the positioning disc 21, and the limiting groove 22 and the positioning shaft 4 are... On the same horizontal plane, the cassette hub base 1 is forged from 40Cr alloy structural steel. A washer (not shown) is provided between the cassette hub base 1 and the cassette freewheel body 2 to adapt to the bicycle cassette derailleur system. The end of the slant bar 31 away from the U-shaped seat 3 can be set with an arc transition surface according to actual use requirements to reduce friction with the micro auxiliary wheel 41. The micro auxiliary wheel 41 fits in close contact with the arc transition surface of the slant bar 31. The rotation of the slant bar 31 pushes the positioning shaft 4 to move axially along the sliding hole. The micro auxiliary wheel 41 is located inside the inner cavity 11. The cassette hub base 1, the cassette freewheel body 2 and the micro auxiliary wheel 41 are all general standard parts or components known to those skilled in the art. Their structure and principle can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0017] A lead screw 42 is rotatably connected at the center between the inner walls on both sides of the inner cavity 11.

[0018] By adopting the above technical solution, the lead screw 42 is provided with optical shaft sections at both ends, which are interference-fitted with the inner ring of the deep groove ball bearing to ensure smooth rotation.

[0019] Positioning rods 45 are symmetrically fixedly connected between the inner walls on both sides of the inner cavity 11 and near the lead screw 42.

[0020] By adopting the above technical solution, the positioning rod 45 is arranged in parallel with the lead screw 42 to limit the rotational freedom of the sliding block 43. The lead screw 42 can be a trapezoidal lead screw 42, thereby preventing the sliding block 43 from moving after locking.

[0021] A sliding block 43 is slidably connected between the two positioning rods 45, and the sliding block 43 is threadedly connected to the lead screw 42.

[0022] By adopting the above technical solution, the sliding block 43 is threadedly connected to the lead screw 42 through the internal threaded hole provided in the sliding block 43. When the lead screw 42 rotates, it drives the sliding block 43 to move axially along the positioning rod 45.

[0023] The two ends of the sliding block 43 are symmetrically connected to the connecting rod 44, and the connecting rod 44 is rotatably connected to the inclined rod 31.

[0024] By adopting the above technical solution, ear plates are symmetrically welded and fixedly connected to both ends of the sliding block 43. The ear plates are rotatably connected to one end of the connecting rod 44 through a pin shaft. The other end of the connecting rod 44 is connected to the connecting hole in the middle section of the inclined rod 31 through the same pin shaft structure, so as to realize the adjustment of the angle of the inclined rod 31 by the movement of the sliding block 43.

[0025] A rotating block 46 is rotatably connected to the center of the side end of the cassette hub base 1, and the side end of the rotating block 46 passes through the cassette hub base 1 and is fixedly connected to the lead screw 42.

[0026] By adopting the above technical solution, the rotating block 46 is set to facilitate rotation with the fixedly connected lead screw 42, and the rotating block 46 is provided with anti-slip texture.

[0027] Working Principle: During installation, the cassette hub base 1 is first inserted into the center of the cassette flywheel body 2 (a washer is required). When the positioning shaft 4 and the limiting groove 22 are on the same horizontal plane, the rotating block 46 is rotated, causing the fixedly connected lead screw 42 to rotate. This causes the threaded sliding block 43 to move horizontally under the action of the two positioning rods 45. Then, under the action of the rotating connecting rod 44, the angle of the inclined rod 31 is offset with the cooperation of the U-shaped seat 3. Finally, with the cooperation of the miniature auxiliary wheel 41, the positioning shaft 4 can be raised and moved out of the cassette hub base 1 to complete the limiting (in cooperation with the limiting groove 22). This achieves the quick disassembly of the cassette flywheel body 2. By setting two sets of symmetrical inclined rods 31 and connecting rods 44, the two positioning shafts 4 can be moved horizontally synchronously.

[0028] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A telescopic flywheel transmission frame comprising a cassette variable speed hub tower (1) and a cassette flywheel body (2), characterized in that: The inner cavity (11) is provided on one side of the cassette-type speed-changing hub base (1). A U-shaped seat (3) is symmetrically fixedly connected to the side wall of the inner cavity (11) near the center. An inclined rod (31) is rotatably connected between the two inner walls of the U-shaped seat (3), and the two inclined rods (31) are symmetrically distributed. The outer ring of the cassette-type hub base (1) and the center of the side near the inner cavity (11) are symmetrically slidably inserted with a positioning shaft (4). The bottom end of the positioning shaft (4) is fixedly connected with a micro auxiliary wheel (41), and the micro auxiliary wheel (41) cooperates with the inclined rod (31). The side end of the cassette-type flywheel body (2) is fixedly connected with a positioning disc (21). The side end of the positioning disc (21) is symmetrically provided with a limiting groove (22) that is compatible with the positioning shaft (4) near the center, and the limiting groove (22) and the positioning shaft (4) are on the same horizontal plane.

2. A telescoping flywheel drive frame as claimed in claim 1 wherein, A lead screw (42) is rotatably connected at the center between the inner walls on both sides of the inner cavity (11).

3. The retractable flywheel transmission frame as described in claim 2, characterized in that, Positioning rods (45) are symmetrically fixedly connected between the inner walls on both sides of the inner cavity (11) and near the lead screw (42).

4. A telescopic flywheel drive frame as claimed in claim 3, characterised in that, A sliding block (43) is slidably connected between the two positioning rods (45), and the sliding block (43) is threadedly connected to the lead screw (42).

5. A telescopic flywheel drive frame as claimed in claim 4, characterised in that, The sliding block (43) is symmetrically connected to the two ends of the connecting rod (44), and the connecting rod (44) is rotatably connected to the inclined rod (31).

6. A telescoping flywheel drive frame as in claim 1, wherein, A rotating block (46) is rotatably connected at the center of the side end of the cassette-type speed-changing hub base (1), and the side end of the rotating block (46) passes through the cassette-type speed-changing hub base (1) and is fixedly connected to the lead screw (42).

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