Crankshaft locking structure of exercise bicycle

Abstract

The utility model discloses a crankshaft locking structure of an exercise bicycle, and relates to the field of exercise bicycles, a positioning cylindrical sleeve is fixed above an exercise bicycle frame, a locking block I and a locking block II are arranged in the positioning cylindrical sleeve, the locking block I and the locking block II are oppositely designed, a clamping adjusting resistance movable hole is arranged between the locking block I and the locking block II, and a clamping adjusting resistance movable hole is arranged in the clamping adjusting resistance movable hole. A crank shaft is arranged in the clamping adjusting resistance movable hole, a fixing nut and a locking adjusting nut are arranged at the left end and the right end of the positioning cylindrical sleeve respectively, a decorative cover is arranged on the outer side face of the locking adjusting nut, pedals are installed at the two ends of the crank shaft, the positioning cylindrical sleeve is sleeved with a positioning cover, and a counter is installed on one side of the upper portion of the exercise bicycle frame. According to the crankshaft locking device, the crankshaft is extruded from the side face through the fixing nut and the locking adjusting nut, so that the first locking block and the second locking block vertically lock the crankshaft, the locking adjusting direction of a user is changed, locking is achieved through rotation from the side face, and the diversified requirements of the market are met.

Description

Technical Field:

[0001] The utility model relates to a crankshaft locking structure of a fitness bike, belonging to the technical field of fitness bikes. Background Art:

[0002] In the field of sports science, a fitness bike is called a "power bike", which is divided into two types: an upright type and a backrest type (also called a horizontal type). The intensity (power) during exercise can be adjusted to achieve a fitness effect, so it is called a fitness bike. It is a typical aerobic fitness equipment that simulates outdoor sports and is also known as a cardio training equipment. It mainly promotes cardiovascular movement, speeds up metabolism, enhances heart and lung functions, and thus improves the physical fitness of the human body through long-term and appropriate-intensity exercise of the body.

[0003] The existing crankshaft locking structure of a fitness bike is not reasonably designed and is complex to install. Generally, it locks by pushing the upper locking block downward from top to bottom, and the adjustment direction is relatively single, which cannot meet the diverse needs of the market. Content of the Utility Model:

[0004] In view of the above problems, the technical problem to be solved by the utility model is to provide a crankshaft locking structure of a fitness bike.

[0005] A crankshaft locking structure of a fitness bike of the utility model includes a fitness bike frame, a positioning cylindrical sleeve, a first locking block, a second locking block, a clamping adjustment resistance moving hole, a crankshaft, a fixing nut, a locking adjustment nut, a decorative cover, a pedal, a positioning cover, and a counter. A positioning cylindrical sleeve is fixed above the fitness bike frame. The first locking block and the second locking block are arranged inside the positioning cylindrical sleeve. The first locking block and the second locking block are designed oppositely. A clamping adjustment resistance moving hole is arranged between the first locking block and the second locking block. The crankshaft is arranged inside the clamping adjustment resistance moving hole. The fixing nut and the locking adjustment nut are respectively arranged at the left and right ends of the positioning cylindrical sleeve. A decorative cover is arranged on the outer side of the locking adjustment nut. Pedals are installed at both ends of the crankshaft. A positioning cover is sleeved outside the positioning cylindrical sleeve. A counter is installed on one side above the fitness bike frame.

[0006] Preferably, anti-slip rubber sleeves are arranged at the four corners of the fitness bike frame.

[0007] Preferably, a limiting hole and a positioning hole are respectively arranged on the first locking block and the second locking block, and are respectively clamped and fixed with a first limiting block and a second limiting block inside the positioning cylindrical sleeve.

[0008] Preferably, tapered clamping walls are arranged at the left and right ends of the first locking block and the second locking block, and form a tapered column with a smaller outer diameter and a larger inner diameter.

[0009] Preferably, a positioning slot is provided on the crankshaft, and the crankshaft is arranged in the clamping adjustment resistance moving hole between the first locking block and the second locking block, and is limited by a gasket and a snap ring.

[0010] Preferably, internal threads are provided on the inner sides of the fixing nut and the locking adjustment nut, and they are screwed and fixed with the external threads at both ends of the positioning cylindrical sleeve.

[0011] The beneficial effects of the present utility model are as follows: It has a reasonable structural design, is simple to install and convenient to use. By squeezing from the side by the fixing nut and the locking adjustment nut, the first locking block and the second locking block lock the crankshaft up and down, changing the adjustment direction of the user's locking, realizing locking by rotating from the side, and meeting the diverse needs of the market. Description of the drawings:

[0012] For ease of explanation, the present utility model will be described in detail by the following specific embodiments and accompanying drawings.

[0013] Figure 1 It is a structural schematic diagram of the present utility model;

[0014] Figure 2 It is a rear view of the present utility model;

[0015] Figure 3 It is an exploded view of the present utility model;

[0016] Figure 4 It is a partial installation structural schematic diagram of the present utility model;

[0017] Figure 5 For Figure 4 exploded view;

[0018] Figure 6 For Figure 5 explosion diagram;

[0019] Figure 7 It is an installation structural schematic diagram of the first locking block and the second locking block, the fixing nut and the locking adjustment nut in the present utility model;

[0020] Figure 8 It is an installation structural schematic diagram of the gasket and the snap ring in the present utility model;

[0021] Figure 9 It is an internal structural schematic diagram of the positioning cylindrical sleeve in the present utility model;

[0022] Figure 10 It is a structural schematic diagram of the first locking block and the second locking block in the present utility model;

[0023] Figure 11 It is a side view of the first locking block and the second locking block in the present utility model.

[0024] 1 - Fitness bike frame; 101 - Anti - slip rubber sleeve; 2 - Positioning cylindrical sleeve; 201 - Limiting block one; 202 - Limiting block two; 3 - Locking block one; 4 - Locking block two; 5 - Clamping adjustment resistance movable hole; 6 - Crankshaft; 601 - Positioning card slot; 602 - Gasket; 603 - Snap ring; 7 - Fixed nut; 8 - Locking adjustment nut; 9 - Decorative cover; 10 - Pedal; 11 - Positioning cover; 12 - Counter; 13 - Limiting hole; 14 - Positioning hole; 15 - Conical clamping wall. Specific implementation manner:

[0025] As Figures 1 - 11 shown, this specific implementation manner adopts the following technical solutions: It includes a fitness bike frame 1, a positioning cylindrical sleeve 2, a locking block one 3, a locking block two 4, a clamping adjustment resistance movable hole 5, a crankshaft 6, a fixed nut 7, a locking adjustment nut 8, a decorative cover 9, a pedal 10, a positioning cover 11, and a counter 12. A positioning cylindrical sleeve 2 is fixed above the fitness bike frame 1. A locking block one 3 and a locking block two 4 are arranged inside the positioning cylindrical sleeve 2. The locking block one 3 and the locking block two 4 are designed oppositely. A clamping adjustment resistance movable hole 5 is arranged between the locking block one 3 and the locking block two 4. A crankshaft 6 is arranged inside the clamping adjustment resistance movable hole 5. Fixed nuts 7 and locking adjustment nuts 8 are respectively arranged at the left and right ends of the positioning cylindrical sleeve 2. A decorative cover 9 is arranged on the outer side of the locking adjustment nut 8. Pedals 10 are installed at both ends of the crankshaft 6. A positioning cover 11 is sleeved outside the positioning cylindrical sleeve 2. A counter 12 is installed on one side above the fitness bike frame 1.

[0026] Anti - slip rubber sleeves 101 are arranged at the four corners of the fitness bike frame 1, which can play an anti - slip role during use.

[0027] Limiting holes 13 and positioning holes 14 are respectively arranged on the locking block one 3 and the locking block two 4, and are respectively clamped and fixed with the limiting block one 201 and the limiting block two 202 inside the positioning cylindrical sleeve 2 to prevent the locking block one 3 and the locking block two 4 from rotating inside the positioning cylindrical sleeve 2.

[0028] Conical clamping walls 15 are arranged at both the left and right ends of the locking block one 3 and the locking block two 4, and form a conical column, smaller on the outside and larger on the inside. When the hole column of the locking adjustment nut 8 moves more inward, the conical columns of the locking block one 3 and the locking block two 4 become larger, the clamping adjustment resistance movable hole 5 becomes smaller, it clamps tighter, the resistance of the crankshaft 6 is greater, and the exerciser has to increase the amount of exercise to complete. On the contrary, when the hole column of the locking adjustment nut 8 moves more outward, the conical columns of the locking block one 3 and the locking block two 4 become smaller, the clamping adjustment resistance movable hole 5 becomes smaller, it clamps tighter, the resistance of the crankshaft 6 is smaller, and it is easier to move.

[0029] A positioning slot 601 is provided on the crankshaft 6. The crankshaft 6 is arranged in the clamping adjustment resistance moving hole 5 between the first locking block 3 and the second locking block 4, and is limited by a gasket 602 and a snap ring 603 to prevent the crankshaft 6 from moving left and right within the first locking block 3 and the second locking block 4. The crankshaft 6 only performs the function of rotation in the clamping adjustment resistance moving hole 5 and does not need to move left and right.

[0030] Internal threads are provided on the inner sides of the fixing nut 7 and the locking adjustment nut 8, and they are screwed and fixed to the external threads at the left and right ends of the positioning cylindrical sleeve 2. The left and right limits of the fixing nut 7 are achieved by the gasket 602 and the snap ring 603 being clamped on the positioning slot 601 on the crankshaft 6 for limiting.

[0031] The structure design of this specific embodiment is reasonable, simple to install, and convenient to use. By squeezing from the side by the fixing nut and the locking adjustment nut, the first locking block and the second locking block lock the crankshaft up and down, changing the adjustment direction of the user for locking, realizing locking by rotating from the side, and meeting the diverse needs of the market.

[0032] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A crankshaft locking structure for a fitness bike, characterized in that: The invention comprises a fitness frame (1), a positioning cylindrical sleeve (2), a locking block 1 (3), a locking block 2 (4), a clamping resistance adjustment hole (5), a crank shaft (6), a fixing nut (7), a locking adjustment nut (8), a decorative cover (9), a pedal (10), a positioning cover (11), and a counter (12). A positioning cylindrical sleeve (2) is fixed on the top of the fitness frame (1), and a locking block 1 (3) and a locking block 2 (4) are arranged in the positioning cylindrical sleeve (2). The locking block 1 (3) and the locking block 2 (4) are designed to be opposite to each other. A clamping resistance adjustment movable hole (5) is provided between the first block (3) and the second locking block (4), a crank shaft (6) is provided in the clamping resistance adjustment movable hole (5), a fixing nut (7) and a locking adjustment nut (8) are provided at the left and right ends of the positioning cylindrical sleeve (2), a decorative cover (9) is provided on the outer side of the locking adjustment nut (8), pedals (10) are installed at both ends of the crank shaft (6), a positioning cover (11) is provided on the outer sleeve of the positioning cylindrical sleeve (2), and a counter (12) is installed on one side above the fitness frame (1).

2. The crankshaft locking structure of a fitness bike according to claim 1, characterized in that: Anti-slip rubber sleeves (101) are arranged on the four corners of the fitness frame (1).

3. The crankshaft locking structure of a fitness bike according to claim 1, characterized in that: The locking block 1 (3) and the locking block 2 (4) are respectively provided with a limit hole (13) and a positioning hole (14), and are respectively clamped and fixed with the limit block 1 (201) and the limit block 2 (202) in the positioning cylindrical sleeve (2).

4. The crankshaft locking structure of a fitness bike according to claim 1, characterized in that: The left and right ends of the locking block 1 (3) and the locking block 2 (4) are both provided with conical clamping walls (15), forming a conical column, which is small outside and large inside.

5. The crankshaft locking structure of a fitness bike according to claim 1, characterized in that: The crankshaft (6) is provided with a positioning slot (601), and the crankshaft (6) is arranged in a clamping resistance adjustment movable hole (5) between the locking block 1 (3) and the locking block 2 (4), and is limited by a gasket (602) and a snap ring (603).

6. The crankshaft locking structure of a fitness bike according to claim 1, characterized in that: The inner sides of the fixing nut (7) and the locking and adjusting nut (8) are both provided with internal threads, and are screwed and fixed to the external threads at the left and right ends of the positioning cylindrical sleeve (2).

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