Lightweight crank structure

Abstract

The utility model provides a kind of lightweight crank structure, it is related to bicycle accessory technical field, including the connecting piece for connecting the axle in sprocket, connecting piece is provided with moving part, moving part includes slide sleeve, two sliding grooves are formed along the length direction of itself symmetry of slide sleeve, and slidingly connected with moving part between two sliding grooves, the connecting hole for connecting pedal is formed along the length direction of slide sleeve symmetry of moving part;The side of slide sleeve towards connecting piece is open to form connecting groove, and connecting groove is matched with connecting piece;The utility model is when using, by the setting of slide sleeve, sliding groove, moving assembly and connecting hole, and by the cooperation of sliding groove, moving part can slide along slide sleeve, simultaneously, connecting hole on moving assembly is connected with pedal, so that the position of pedal can be adjusted according to actual demand when using device, to adapt to different use scenarios, and then expand the application range of device.

Description

Technical Field

[0001] This utility model relates to the field of bicycle parts technology, and in particular to a lightweight crank structure. Background Technology

[0002] As a core transmission component in bicycles, fitness equipment, and machinery, the crank is widely used in bicycles, motorcycles, fitness equipment, and industrial rotating equipment. Its function is to convert rotational motion into reciprocating motion or transmit torque, and its performance directly affects the overall efficiency of the equipment and the user experience. Traditional crank structures are mostly made of solid metal materials (such as steel and aluminum alloys), which, while possessing high strength, suffer from problems such as heavy weight and significant inertial resistance. Especially in high-speed motion scenarios, the extra weight significantly increases energy consumption and reduces handling flexibility. With the popularization of lightweight design concepts, existing technologies attempt to reduce weight through material substitution (such as carbon fiber) or structural optimization (such as hollow design). However, in the current lightweight crank structure, the pedal position is fixed during use and cannot be adjusted according to the actual usage scenario. Utility Model Content

[0003] To address the shortcomings of the existing technology, this utility model proposes a lightweight crank structure.

[0004] The technical solution of this utility model is implemented as follows:

[0005] A lightweight crank structure includes a connector for connecting to the chainring bottom bracket. The connector has a movable part, which includes a sliding sleeve. The sliding sleeve has two symmetrically formed grooves along its own length. A movable part is slidably connected between the two grooves. The movable part has two symmetrically formed connecting holes for connecting to the pedals along the length of the sliding sleeve.

[0006] Preferably, the sliding sleeve is open on one side facing the connector to form a connecting groove, the connecting groove matches the connector, and the sliding sleeve is screwed with a detachable limiting rod, the free end of the limiting rod extending into the connecting groove to clamp the connector.

[0007] Preferably, the connector includes a connecting rod, one end of which is formed with a notch, and both sides of the connecting rod near the notch are formed with through holes, and a detachable fixing rod is screwed between the two through holes.

[0008] Preferably, the inner wall of the notch protrudes outward to form multiple limiting grooves.

[0009] Preferably, one side of the connecting rod is open to form a lightweight perforation, and a reinforcing transverse rib is fixedly connected inside the lightweight perforation. Multiple reinforcing longitudinal ribs are vertically fixedly connected to the reinforcing transverse rib.

[0010] Preferably, the movable part includes two symmetrically arranged sliding plates, which are slidably connected to the interior of two sliding grooves, and two connecting brackets are symmetrically fixed between the two sliding plates, with connecting holes formed on the sliding plates.

[0011] Preferably, a V-shaped reinforcing rib is fixedly connected between the reinforcing transverse rib and the reinforcing longitudinal rib.

[0012] Preferably, the top and bottom of the connecting rod are both formed with side grooves along their own length direction, and the side grooves match the limiting rod.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. In use, this utility model, through the setting of a sliding sleeve, a sliding groove, a moving component and a connecting hole, and with the cooperation of the sliding groove, allows the moving part to slide along the sliding sleeve. At the same time, the connecting hole on the moving component is connected to the foot pedal, so that the position of the foot pedal can be adjusted according to actual needs during use, thereby adapting to different usage scenarios and expanding the application range of the device.

[0015] 2. In use, the sliding sleeve can slide along the connecting rod by setting the connecting groove, connecting rod and limiting rod. When a fixed position is required, the limiting rod on the sliding sleeve is rotated to clamp the connecting rod, thereby realizing convenient adjustment of the position of the sliding plate and the connecting frame. This design further enhances the adjustment flexibility of the device and expands the adjustment range of the device. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a perspective view of the present utility model;

[0018] Figure 2 This is a perspective view of the present invention after it has been unfolded.

[0019] Figure 3 This is an exploded view of the connector of this utility model;

[0020] Figure 4 This is a perspective view of the movable component of this utility model;

[0021] Figure 5 This is a side view of the skateboard and pedals of this utility model when they are connected.

[0022] In the diagram: 1. Connector; 11. Connecting rod; 12. Notch; 13. Limiting groove; 14. Through hole; 15. Fixing rod; 16. Side groove; 17. Lightweight perforation; 18. V-shaped reinforcing rib; 19. Reinforcing transverse rib; 110. Reinforcing longitudinal rib; 2. Moving part; 21. Sliding sleeve; 22. Connecting groove; 23. Sliding groove; 24. Limiting rod; 25. Slide plate; 26. Connecting hole; 27. Connecting frame. Detailed Implementation

[0023] 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.

[0024] like Figures 1-5 As shown, the present invention provides a lightweight crank structure, including a connector 1 for connecting the crankset bottom bracket, a movable part 2 provided on the connector 1, the movable part 2 including a sliding sleeve 21, the sliding sleeve 21 symmetrically forming two sliding grooves 23 along its own length direction, a movable part slidably connected between the two sliding grooves 23, the movable part symmetrically forming two connecting holes 26 for connecting the pedals along the length direction of the sliding sleeve 21.

[0025] With the above technical solution, when installing the device, the connector 1 is connected to the central axis of the chainring and fixed to the central axis of the chainring. After the connector 1 is installed, the moving part on the sliding sleeve 21 is pulled, so that the moving part slides along the sliding groove 23 on the sliding sleeve 21, thereby adjusting the position of the moving part on the sliding sleeve 21. After the position of the moving part is adjusted, the foot pedal is screwed into the connecting hole 26 on the moving part, so that the foot pedal abuts against the sliding sleeve 21, thereby completing the installation of the device. When the person steps on the foot pedal, the foot pedal drives the sliding sleeve 21 and the connector 1 to rotate around the central axis of the chainring. When it is necessary to adjust the position of the sliding part, the foot pedal is disassembled, so that the foot pedal is separated from the connecting hole 26 on the moving part, and the moving part can be pulled to slide along the sliding groove 23 on the sliding sleeve 21, thereby adjusting the position of the moving part, making the device easy to adapt to users of different body types.

[0026] To further expand the application range of the device, such as Figure 1 , Figure 2 and Figure 4 As shown, the sliding sleeve 21 is open on the side facing the connector 1 to form a connecting groove 22. The connecting groove 22 matches the connector 1, and the sliding sleeve 21 is screwed with a detachable limiting rod 24. The free end of the limiting rod 24 extends into the connecting groove 22 to clamp the connector 1.

[0027] In this embodiment, after the position of the sliding part on the sliding sleeve 21 is adjusted, the sliding sleeve 21 is pulled relative to the connecting member 1 by cooperating with the connecting groove 22, thereby adjusting the position of the sliding sleeve 21 on the connecting member 1. After the position of the sliding sleeve 21 is adjusted, the limiting rod 24 on the sliding sleeve 21 is rotated, so that one end of the limiting rod 24 moves into the interior of the connecting groove 22 until one end of the limiting rod 24 clamps the connecting member 1, so that the sliding sleeve 21 is fixed on the connecting member 1 at the position required by the personnel, thereby completing the position adjustment of the foot pedal, further increasing the usability of the foot pedal, and further expanding the usability of the device.

[0028] Specifically, in one embodiment, regarding the aforementioned connector 1, as... Figures 1-3 As shown, the connector 1 includes a connecting rod 11, one end of which forms a notch 12, and both sides of the connecting rod 11 near the notch 12 form through holes 14, and a detachable fixing rod 15 is screwed between the two through holes 14.

[0029] In this embodiment, when it is necessary to connect the device to the central shaft of the dental crank, the connecting rod 11 is connected to the central shaft of the dental crank through the notch 12. The fixing rod 15 in the through hole 14 is rotated so that the two sides of the notch in the notch 12 are close together until the connecting rod 11 is fixed on the central shaft of the dental crank. After the connecting rod 11 is fixed, the sliding sleeve 21 is pulled relative to the connecting rod 11 through the connecting groove 22, thereby adjusting the position of the sliding sleeve 21 on the connecting rod 11. After the position of the sliding sleeve 21 is adjusted, the limiting rod 24 on the sliding sleeve 21 is rotated so that one end of the limiting rod 24 moves into the interior of the connecting groove 22 until one end of the limiting rod 24 clamps the connecting rod 11, so that the sliding sleeve 21 is fixed on the connecting rod 11 at the position required by the personnel.

[0030] When the notch 12 is connected to the central shaft of the gear set, in order to improve the tightness of the device, such as... Figures 1-3 As shown, the inner wall of the notch 12 protrudes outward to form multiple limiting grooves 13.

[0031] In this embodiment, when the notch 12 is connected to the central shaft of the gear set, the connecting rod 11 is fixed more securely by the cooperation of the limiting groove 13.

[0032] To reduce the mass of connecting rod 11 and increase its strength, such as Figures 2-3 As shown, one side of the connecting rod 11 is open to form a lightweight perforation 17. A reinforcing transverse rib 19 is fixedly connected inside the lightweight perforation 17, and multiple reinforcing longitudinal ribs 110 are vertically fixedly connected to the reinforcing transverse rib 19.

[0033] In this embodiment, after the connecting rod 11 is fixed on the central shaft of the gearbox, the lightweight perforation 17 on the connecting rod 11 accommodates the reinforcing transverse rib 19 and the reinforcing longitudinal rib 110, thereby reducing the weight of the connecting rod 11 while maintaining its strength and reducing the probability of damage to the connecting rod 11.

[0034] Specifically, in one embodiment, regarding the aforementioned movable portion, such as Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the movable part includes two symmetrically arranged slide plates 25. The two slide plates 25 are slidably connected to the inside of two slide grooves 23, and two connecting brackets 27 are symmetrically fixedly connected between the two slide plates 25. Connecting holes 26 are formed on the slide plates 25.

[0035] In this embodiment, the slide plate 25 and the connecting frame 27 are moved by pulling them. The slide plate 25 and the connecting frame 27 slide along the sliding sleeve 21 by cooperating with the sliding groove 23 on the sliding sleeve 21. After the position of the slide plate 25 and the connecting frame 27 is adjusted, the foot pedal is connected to the connecting hole 26 on the slide plate 25 to complete the connection between the foot pedal and the device. When it is necessary to remove the foot pedal, the foot pedal on the slide plate 25 can be rotated to remove the foot pedal.

[0036] Furthermore, in order to further increase the strength of the connecting rod 11, a V-shaped reinforcing rib 18 is fixedly connected between the reinforcing transverse rib 19 and the reinforcing longitudinal rib 110.

[0037] In this embodiment, the reinforcing transverse rib 19 and reinforcing longitudinal rib 110 are accommodated by the lightweight perforation 17 on the connecting rod 11, and the strength of the connecting rod 11 is further increased by the V-shaped reinforcing rib 18.

[0038] In addition, in this utility model, in order to further improve the tightness of the sliding sleeve 21 after adjusting its position, such as Figures 1-3 As shown, the top and bottom of the connecting rod 11 are both formed with side grooves 16 along their own length direction, and the side grooves 16 match the limiting rod 24.

[0039] In this embodiment, when a person pulls the sliding sleeve 21 to slide along the connecting rod 11, the limiting rod 24 on the sliding sleeve 21 is rotated, so that the free end of the limiting rod 24 moves into the connecting groove 22 to clamp the connecting rod 11. Furthermore, through the cooperation of the side groove 16, the adjusted position of the sliding sleeve 21 and the connecting rod 11 is made more secure.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lightweight crank structure, characterized in that: It includes a connector (1) for connecting the crankset spindle, and a movable part (2) is provided on the connector (1). The movable part (2) includes a sliding sleeve (21). The sliding sleeve (21) forms two sliding grooves (23) symmetrically along its own length direction. A movable part is slidably connected between the two sliding grooves (23). The movable part forms two connecting holes (26) symmetrically along the length direction of the sliding sleeve (21) for connecting the foot pedal.

2. The lightweight crank structure according to claim 1, characterized in that: The sliding sleeve (21) is open on the side facing the connector (1) to form a connecting groove (22). The connecting groove (22) matches the connector (1), and the sliding sleeve (21) is screwed with a detachable limiting rod (24). The free end of the limiting rod (24) extends into the connecting groove (22) to clamp the connector (1).

3. The lightweight crank structure according to claim 2, characterized in that: The connector (1) includes a connecting rod (11), one end of which forms a notch (12), and both sides of the connecting rod (11) near the notch (12) form through holes (14), and a detachable fixing rod (15) is screwed between the two through holes (14).

4. The lightweight crank structure according to claim 3, characterized in that: The inner wall of the notch (12) protrudes outward to form multiple limiting grooves (13).

5. A lightweight crank structure according to claim 3, characterized in that: One side of the connecting rod (11) is open to form a lightweight perforation (17), and a reinforcing transverse rib (19) is fixedly connected inside the lightweight perforation (17). Multiple reinforcing longitudinal ribs (110) are vertically fixedly connected to the reinforcing transverse rib (19).

6. A lightweight crank structure according to claim 1 or 2, characterized in that: The movable part includes two symmetrically arranged slide plates (25), which are slidably connected to the interior of two slide grooves (23) respectively, and two connecting brackets (27) are symmetrically fixed between the two slide plates (25). The connecting hole (26) is formed on the slide plate (25).

7. A lightweight crank structure according to claim 5, characterized in that: A V-shaped reinforcing rib (18) is fixedly connected between the reinforcing transverse rib (19) and the reinforcing longitudinal rib (110).

8. A lightweight crank structure according to claim 3 or 4, characterized in that: The top and bottom of the connecting rod (11) are both formed with side grooves (16) along their own length direction, and the side grooves (16) are matched with the limiting rod (24).

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