An engine crankshaft assembly for a powered surfboard

Abstract

The application discloses an engine crankshaft assembly for a power surfboard and relates to the technical field of power surfboards.The engine crankshaft assembly comprises a crankshaft, a shaft coupling connecting assembly is arranged on one side of the crankshaft, a connecting rod is hingedly connected in the crankshaft, a piston assembly is hingedly connected to one end of the connecting rod away from the crankshaft, the connecting rod comprises a limiting sleeve rod and a limiting strip, one end of the limiting sleeve rod and the limiting strip away from each other is provided with a connecting sleeve, one end of the limiting strip away from the connecting sleeve is provided with a moving rod, one end of the moving rod away from the limiting strip is transversely and slidingly inserted into the limiting sleeve rod, and flanges are arranged on the two sides of the moving rod.The engine crankshaft assembly for the power surfboard can conveniently adjust the length of the connecting rod, thereby controlling the compression stroke of the piston assembly, so that the engine can be used for different models, and the power surfboard can bring better experience to users.The length adjusting device does not occupy space and is convenient to operate.

Description

Technical Field

[0001] This invention relates to the field of powered surfboard technology, specifically to an engine crankshaft assembly for powered surfboards. Background Technology

[0002] A motorized surfboard is an innovative mode of transportation that combines electric technology with water sports. It is typically powered by an electric motor or engine, allowing users to glide, surf, or engage in various water activities on the water. The engine is the core component of a motorized surfboard, and the quality of the engine crankshaft assembly directly affects the user experience of the motorized surfboard.

[0003] Currently, the connecting rod length of the crankshaft assembly of a power surfboard engine is fixed and cannot be adjusted, thus preventing changes to the piston's compression stroke. This limits its compatibility with only one type of engine. Therefore, there is a need to develop a crankshaft assembly for a power surfboard engine that allows for easy adjustment of the connecting rod length. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an engine crankshaft assembly for motor surfboards, which solves the problem that the connecting rod length of current motor surfboard engine crankshaft assemblies is fixed and cannot be adjusted.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: an engine crankshaft assembly for a power surfboard, comprising a crankshaft, a coupling connection assembly provided on one side of the crankshaft, a connecting rod hinged inside the crankshaft, and a piston assembly hinged to the end of the connecting rod away from the crankshaft.

[0006] The connecting rod includes a limiting sleeve and a limiting strip. A connecting sleeve is provided at the opposite ends of the limiting sleeve and the limiting strip. A moving rod is provided at the end of the limiting strip away from the connecting sleeve. The end of the moving rod away from the limiting strip is laterally slidably inserted into the limiting sleeve. Both sides of the moving rod are provided with flanges. A positioning hole is provided at the upper part of the flange. A positioning element for fixing the moving rod is provided at the upper part of the end of the limiting sleeve away from the connecting sleeve.

[0007] Preferably, both sides of the limiting sleeve are provided with limiting grooves, and the side of the flange away from the moving rod slides laterally through the limiting groove.

[0008] Preferably, the positioning element includes a concave block, which is sleeved on the upper part of the limiting sleeve rod. A limiting shaft is provided on the inner top side of the concave block. The lower end of the limiting shaft slides longitudinally through the upper part of the limiting sleeve rod and is connected to a stop block. A first spring is sleeved on the outside of the limiting shaft inside the limiting sleeve rod. The two ends of the first spring are respectively connected to the upper part of the stop block and the inner top side of the limiting sleeve rod.

[0009] Preferably, the upper part of the movable rod is provided with a strip groove corresponding to the stop block, and the stop block is disposed in the strip groove and is laterally slidably connected to the movable rod.

[0010] Preferably, the piston assembly includes a piston block, the lower part of which has an opening, and a fixed shaft is disposed within the opening. The connecting sleeve on the limiting strip is hinged to the fixed shaft.

[0011] Preferably, the piston block has an internal cavity, and a limiting cylinder is provided inside the cavity. An oil channel is formed between the limiting cylinder and the inner wall of the cavity. The outer walls of the piston block are densely covered with micropores. An oil reservoir is provided inside the cavity at the position of the limiting cylinder. The lower side of the oil reservoir is connected to the upper inner side of the limiting cylinder through a delivery pipe. The oil reservoir is filled with lubricating oil. A moving shaft is longitudinally slidably inserted into the upper part of the piston block. The lower end of the moving shaft is connected to a piston plate inside the cavity. The piston plate is located above the lubricating oil. A connecting plate is connected to the upper end of the moving shaft. A second spring is sleeved on the upper end of the moving shaft. The two ends of the second spring are connected to the upper part of the piston block and the lower part of the connecting plate, respectively.

[0012] Preferably, the upper end of the movable shaft is threadedly connected to a bolt rod.

[0013] Preferably, the end of the crankshaft furthest from the coupling connection assembly is connected to a one-way clutch assembly via a starting assembly. The starting assembly includes a deep groove ball bearing, a crankshaft oil seal, and a snap ring. The deep groove ball bearing, crankshaft oil seal, and snap ring are sequentially clamped onto the crankshaft. The one-way clutch assembly is a gear clutch assembly formed by three one-way clutches working together to ensure high torque while minimizing wear between the clutch and the crankshaft.

[0014] This invention provides an engine crankshaft assembly for a power surfboard, which has the following advantages compared with the prior art:

[0015] 1. The crankshaft assembly for the engine used in motor surfboards allows for easy adjustment of the connecting rod length, thereby controlling the compression stroke of the piston assembly and adapting it to different engine models. This results in a better user experience for the motor surfboard. The length adjustment device is space-saving, easy to operate, and ensures the stability of the connecting rod after the length is adjusted, preventing it from loosening.

[0016] 2. In the crankshaft assembly of the engine used in the power surfboard, when the piston assembly compresses air, the air will exert pressure on the connecting plate. Under the elasticity of the second spring, the piston plate will squeeze the lubricating oil in the oil reservoir, thereby allowing the lubricating oil to enter the oil passage and then overflow from the micropores on the outer wall of the piston block, which plays a lubricating role on the piston block, thereby extending the service life of the piston block.

[0017] 3. The crankshaft assembly of the engine used in the power surfboard changes the conventional one-way clutch with balls on both sides to a gear clutch assembly formed by three one-way clutches. This ensures high torque while minimizing wear between the clutch and the crankshaft. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the connecting rod of the present invention;

[0020] Figure 3 This is a schematic diagram of the positioning component of the present invention;

[0021] Figure 4 This is a schematic diagram of the piston assembly of the present invention;

[0022] Figure 5 This is a schematic diagram of the one-way clutch assembly of the present invention.

[0023] In the diagram: 1. Crankshaft; 2. Coupling assembly; 3. Connecting rod; 31. Limiting sleeve; 32. Limiting strip; 33. Connecting sleeve; 34. Moving rod; 35. Flange; 36. Positioning hole; 37. Positioning element; 371. Concave block; 372. Limiting shaft; 373. Stop block; 374. First spring; 375. Positioning shaft; 376. Through groove; 38. Limiting groove; 39. Strip groove; 4. Piston assembly; 41. Piston block; 42. Fixed shaft; 43. Limiting cylinder; 44. Oil passage; 45. Oil reservoir; 46. Delivery pipe; 47. Moving shaft; 48. Piston plate; 49. Connecting plate; 410. Second spring; 411. Bolt rod; 5. One-way clutch assembly; 6. Starting assembly; 61. Deep groove ball bearing; 62. Crankshaft oil seal; 63. Snap ring. Detailed Implementation

[0024] 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, and 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.

[0025] Please see Figure 1-4 This invention provides two technical solutions:

[0026] Example 1

[0027] Please see Figure 1 In this embodiment of the invention, an engine crankshaft assembly for a power surfboard includes a crankshaft 1, a coupling connection assembly 2 is provided on one side of the crankshaft 1, a connecting rod 3 is hinged inside the crankshaft 1, and a piston assembly 4 is hinged to the end of the connecting rod 3 away from the crankshaft 1.

[0028] Please see Figure 2 In this embodiment of the invention, the connecting rod 3 includes a limiting sleeve rod 31 and a limiting strip 32. A connecting sleeve 33 is provided at the opposite ends of the limiting sleeve rod 31 and the limiting strip 32. A moving rod 34 is provided at the end of the limiting strip 32 away from the connecting sleeve 33. The end of the moving rod 34 away from the limiting strip 32 is laterally slidably inserted into the limiting sleeve rod 31. Both sides of the moving rod 34 are provided with flanges 35. A positioning hole 36 is provided at the upper part of the flanges 35. A positioning member 37 for fixing the moving rod 34 is provided at the upper part of the end of the limiting sleeve rod 31 away from the connecting sleeve 33.

[0029] Please see Figure 3 In this embodiment of the invention, the positioning member 37 includes a concave block 371, which is sleeved on the upper part of the limiting sleeve rod 31. A limiting shaft 372 is provided on the inner top side of the concave block 371. The lower end of the limiting shaft 372 slides longitudinally through the upper part of the limiting sleeve rod 31 and is connected to a stop block 373. A first spring 374 is sleeved on the outside of the limiting shaft 372 inside the limiting sleeve rod 31. The two ends of the first spring 374 are respectively connected to the upper part of the stop block 373 and the inner top side of the limiting sleeve rod 31.

[0030] In use, hold the concave block 371 with your fingers and insert it into the through groove 376. Then, under the elasticity of the first spring 374, pull the concave block 371 upward so that the positioning shafts 375 at both ends of the concave block 371 leave the positioning holes 36 on the flange 35. Next, slide the moving rod 34 to adjust the overall length of the connecting rod 3. After adjustment, release the concave block 371. The first spring 374 will reset the concave block 371, so that the positioning shafts 375 at both ends of the concave block 371 are inserted into the corresponding positioning holes 36 on the flange 35, and the moving rod 34 is fixed in place. This completes the length adjustment of the connecting rod 3.

[0031] For further details, please refer to Figure 2 In this embodiment of the invention, limiting grooves 38 are provided on both sides of the limiting sleeve rod 31. The flange 35, on the side away from the moving rod 34, slides laterally through the limiting groove 38. The limiting groove 38 plays a guiding and limiting role for the flange 35.

[0032] For further details, please refer to Figure 2 In this embodiment of the invention, the upper part of the moving rod 34 is provided with a strip groove 39 corresponding to the stop block 373. The stop block 373 is disposed in the strip groove 39 and is slidably connected to the moving rod 34 laterally. The strip groove 39 plays a guiding and limiting role in the movement of the stop block 373.

[0033] Example 2 differs from Example 1 in that:

[0034] Please see Figure 4 In this embodiment of the invention, the piston assembly 4 includes a piston block 41, the lower part of the piston block 41 is provided with an opening, a fixed shaft 42 is provided in the opening, and the connecting sleeve 33 on the limiting strip 32 is hinged to the fixed shaft 42.

[0035] Please see Figure 4 In this embodiment of the invention, the piston block 41 has an internal cavity, and a limiting cylinder 43 is provided inside the cavity. An oil channel 44 is formed between the limiting cylinder 43 and the inner wall of the cavity. The outer wall of the piston block 41 is densely covered with micropores. An oil storage shell 45 is provided inside the cavity at the position of the limiting cylinder 43. The lower side of the oil storage shell 45 is connected to the upper inner side of the limiting cylinder 43 through a delivery pipe 46. The oil storage shell 45 is filled with lubricating oil. A moving shaft 47 is longitudinally slidably inserted into the upper part of the piston block 41. The lower end of the moving shaft 47 is connected to a piston plate 48 inside the cavity. The piston plate 48 is located above the lubricating oil. A connecting plate 49 is connected to the upper end of the moving shaft 47. A second spring 410 is sleeved on the outer side of the upper end of the moving shaft 47. The two ends of the second spring 410 are respectively connected to the upper part of the piston block 41 and the lower part of the connecting plate 49.

[0036] In use, when the connecting rod 3 moves, it will drive the piston assembly 4 to move. The piston assembly 4 will compress the air. During the air compression process, the air will exert pressure on the connecting plate 49. Under the elasticity of the second spring 410, the connecting plate 49 will cause the moving shaft 47 to drive the piston plate 48 to move. The piston plate 48 will squeeze the lubricating oil in the oil reservoir 45, so that the lubricating oil flows into the oil channel 44 through the delivery pipe 46, and then overflows from the micropores on the outer wall of the piston block 41, thus lubricating the outer wall of the piston block 41.

[0037] For further details, please refer to Figure 4 In this embodiment of the invention, the upper end of the movable shaft 47 is threadedly connected to a bolt rod 411, which can be removed to facilitate the addition of lubricating oil.

[0038] Example 3 differs from Example 1 in that:

[0039] Please see Figure 5In this embodiment of the invention, the end of the crankshaft 1 away from the coupling connection assembly 2 is connected to a one-way clutch assembly 5 via a starting assembly 6. The starting assembly 6 includes a deep groove ball bearing 61, a crankshaft oil seal 62, and a snap ring 63. The deep groove ball bearing 61, the crankshaft oil seal 62, and the snap ring 63 are sequentially clamped onto the crankshaft 1. The one-way clutch assembly 5 is a gear clutch assembly formed by three one-way clutches working together to ensure high torque while minimizing wear between the clutch and the crankshaft 1.

[0040] Working principle: Hold the concave block 371 with your fingers and insert it into the through groove 376. Then, under the elasticity of the first spring 374, pull the concave block 371 upward so that the positioning shafts 375 at both ends of the concave block 371 leave the positioning holes 36 on the flange 35. Next, slide the moving rod 34 to adjust the overall length of the connecting rod 3. After adjustment, release the concave block 371. The first spring 374 will reset the concave block 371, so that the positioning shafts 375 at both ends of the concave block 371 are inserted into the corresponding positioning holes 36 on the flange 35, and the moving rod 34 is fixed in place. This completes the length adjustment of the connecting rod 3.

[0041] When the connecting rod 3 moves, it drives the piston assembly 4 to move. The piston assembly 4 compresses the air. During the air compression process, the air exerts pressure on the connecting plate 49. Under the elasticity of the second spring 410, the connecting plate 49 causes the moving shaft 47 to drive the piston plate 48 to move. The piston plate 48 squeezes the lubricating oil in the oil reservoir 45, causing the lubricating oil to flow into the oil channel 44 through the delivery pipe 46. Then, it overflows from the micropores on the outer wall of the piston block 41, lubricating the outer wall of the piston block 41.

[0042] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. A crankshaft assembly for a motor surfboard, comprising a crankshaft (1), wherein a coupling connection assembly (2) is provided on one side of the crankshaft (1), characterized in that: A connecting rod (3) is hinged inside the crankshaft (1), and a piston assembly (4) is hinged to the end of the connecting rod (3) away from the crankshaft (1); the connecting rod (3) includes a limiting sleeve (31) and a limiting strip (32), and a connecting sleeve (33) is provided at the opposite ends of the limiting sleeve (31) and the limiting strip (32), and a moving rod (34) is provided at the end of the limiting strip (32) away from the connecting sleeve (33), and the end of the moving rod (34) away from the limiting strip (32) is laterally slidably inserted into the limiting sleeve (31), and a flange (35) is provided on both sides of the moving rod (34), and a positioning hole (36) is provided on the upper part of the flange (35), and a positioning member (37) for fixing the moving rod (34) is provided on the upper part of the end of the limiting sleeve (31) away from the connecting sleeve (33); The positioning component (37) includes a concave block (371), which is sleeved on the upper part of the limiting sleeve (31). A limiting shaft (372) is provided on the inner top side of the concave block (371). The lower end of the limiting shaft (372) slides longitudinally through the upper part of the limiting sleeve (31) and is connected to a stop block (373). A first spring (374) is sleeved on the outside of the limiting shaft (372) inside the limiting sleeve (31). The two ends of the first spring (374) are respectively connected to the upper part of the stop block (373) and the inner top side of the limiting sleeve (31). The upper part of the moving rod (34) is provided with a strip groove (39) corresponding to the stop block (373). The stop block (373) is set in the strip groove (39) and is laterally slidably connected to the moving rod (34).

2. The engine crankshaft assembly for a power surfboard according to claim 1, characterized in that: The limiting sleeve (31) is provided with limiting grooves (38) on both sides, and the flange (35) slides laterally through the limiting groove (38) on the side away from the moving rod (34).

3. The engine crankshaft assembly for a power surfboard according to claim 1, characterized in that: The piston assembly (4) includes a piston block (41), the lower part of which is provided with an opening, and a fixed shaft (42) is provided in the opening. The connecting sleeve (33) on the limiting strip (32) is hinged to the fixed shaft (42).

4. The engine crankshaft assembly for a power surfboard according to claim 3, characterized in that: The piston block (41) has an internal cavity, and a limiting cylinder (43) is installed inside the cavity. An oil channel (44) is formed between the limiting cylinder (43) and the inner wall of the cavity. The outer wall of the piston block (41) is densely covered with micropores. An oil reservoir (45) is installed inside the cavity at the position inside the limiting cylinder (43). The lower side of the oil reservoir (45) is connected to the upper inner side of the limiting cylinder (43) through a delivery pipe (46). The oil reservoir (45) contains... The piston block (41) is equipped with lubricating oil. A movable shaft (47) is longitudinally slidably inserted into the upper part of the piston block (41). The lower end of the movable shaft (47) is connected to a piston plate (48) inside the cavity. The piston plate (48) is located above the lubricating oil. A connecting plate (49) is connected to the upper end of the movable shaft (47). A second spring (410) is sleeved on the outside of the upper end of the movable shaft (47). The two ends of the second spring (410) are respectively connected to the upper part of the piston block (41) and the lower part of the connecting plate (49).

5. The engine crankshaft assembly for a power surfboard according to claim 4, characterized in that: The upper end of the movable shaft (47) is threadedly connected to a bolt rod (411).

6. The engine crankshaft assembly for a power surfboard according to claim 1, characterized in that: The crankshaft (1) is connected to a one-way clutch assembly (5) via a starting assembly (6) at one end away from the coupling connection assembly (2). The starting assembly (6) includes a deep groove ball bearing (61), a crankshaft oil seal (62), and a snap ring (63). The deep groove ball bearing (61), the crankshaft oil seal (62), and the snap ring (63) are sequentially clamped onto the crankshaft (1). The one-way clutch assembly (5) is a gear clutch assembly formed by the combination of three one-way clutches. The gears cooperate with each other to ensure high torque while minimizing wear between the clutch and the crankshaft (1).

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