Bidirectional damping cylinder on fitness equipment

Abstract

The utility model provides a bidirectional damping cylinder on fitness equipment, and belongs to the technical field of fitness equipment accessories. Comprising a cylinder body, a push-pull rod and a piston, the push-pull rod is sleeved with two damping springs located at the two ends of the piston respectively, the piston comprises a rubber sleeve, an inner sleeve, a positioning block fixed to the push-pull rod and two limiting sleeves fixed to the two ends of the inner sleeve respectively, the inner sleeve is sleeved with the rubber sleeve, and the positioning block is located between the two limiting sleeves; first overflow holes are formed between the limiting sleeves and the push-pull rod, second overflow holes are formed between the positioning block and the inner wall of the inner sleeve, reset springs are connected between the positioning block and the two limiting sleeves respectively, and the limiting sleeves can abut against the positioning block so that the first overflow holes in the limiting sleeves can be separated from the second overflow holes in the limiting sleeves. The utility model discloses can realize the gentle action of bodybuilding.

Description

A two-way damping cylinder for fitness equipment Technical Field

[0001] This utility model belongs to the technical field of fitness equipment accessories, and relates to a bidirectional damping cylinder for fitness equipment. Background Technology

[0002] Many fitness equipment pieces involve damping cylinders, such as swimming simulators and steppers (with handles), which involve pushing and pulling movements. As a component that provides reverse resistance during exercise, the damping cylinder in current technology is mostly achieved through overflow. However, when the user exerts strong force, the damping cylinder will move at a high frequency, and the resistance is not consistent compared to slow movements, and the damping force is not smooth. As we all know, there is a concept in the bodybuilding field called muscle stress time. From this perspective, reducing the speed of movement can actually increase the muscle stress time. The longer the stress time of muscle fibers, the more fatigued they will become, thus promoting growth. However, existing damping cylinders cannot effectively limit the training speed. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by providing a bidirectional damping cylinder for fitness equipment. The technical problem this invention aims to solve is how to limit the pushing and pulling speed.

[0004] The purpose of this utility model can be achieved through the following technical solution: A bidirectional damping cylinder for fitness equipment, characterized in that it includes a cylinder body, a push-pull rod, and a piston. Two damping springs are respectively located at both ends of the piston and sleeved on the push-pull rod. The piston includes a rubber sleeve, an inner sleeve, a positioning block fixed on the push-pull rod, and two limiting sleeves respectively fixed at both ends of the inner sleeve. The rubber sleeve is sleeved outside the inner sleeve. The positioning block is located between the two limiting sleeves. An overflow hole one is provided between the limiting sleeve and the push-pull rod. An overflow hole two is provided between the positioning block and the inner wall of the inner sleeve. A return spring is connected between the positioning block and the two limiting sleeves respectively. The limiting sleeve can abut against the positioning block to isolate the overflow hole one and overflow hole two on the limiting sleeve.

[0005] In this design, when the push-pull rod receives a large external force, the positioning block and the limiting sleeve on the side of the push-pull rod moving direction abut against each other, preventing the fluid between the two ends of the piston from flowing, thus "locking" the push-pull rod and preventing it from being pushed or pulled quickly. In other words, this damping cylinder can force the user to train smoothly.

[0006] The flow path of the liquid between the two ends of the piston is as follows: it enters the space between the limiting sleeve and the positioning block from one side of the overflow hole, then enters the overflow hole on the other side through the overflow hole, and finally enters the other side of the piston. When one of the limiting sleeves and the positioning block abuts, the flow of liquid between the two sides of the piston is restricted, thereby realizing the locking of the damping cylinder, that is, the limitation of the push-pull speed. Attached Figure Description

[0007] Figure 1 is a schematic diagram of the structure of this damping cylinder.

[0008] Figure 2 is a cross-sectional view of the piston.

[0009] In the diagram, 1. Cylinder body; 2. Push-pull rod; 3. Piston; 31. Rubber sleeve; 32. Inner sleeve; 33. Positioning block; 34. Limiting sleeve; 35. Overflow hole one; 36. Overflow hole two; 37. Return spring; 4. Damping spring. Detailed Implementation

[0010] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0011] As shown in Figures 1 and 2, the damping cylinder includes a cylinder body 1, a push-pull rod 2, and a piston 3. Two damping springs 4 are sleeved on the push-pull rod 2 and located at both ends of the piston 3. The piston 3 includes a rubber sleeve 31, an inner sleeve 32, a positioning block 33 fixed on the push-pull rod 2, and two limiting sleeves 34 fixed at both ends of the inner sleeve 32. The rubber sleeve 31 is sleeved outside the inner sleeve 32. The positioning block 33 is located between the two limiting sleeves 34. There is an overflow hole 35 between the limiting sleeve 34 and the push-pull rod 2. There is an overflow hole 36 between the positioning block 33 and the inner wall of the inner sleeve 32. A return spring 37 is connected between the positioning block 33 and the two limiting sleeves 34. The limiting sleeve 34 can abut against the positioning block 33 to separate the overflow hole 35 and the overflow hole 36 on the limiting sleeve 34.

[0012] In this design, when the push-pull rod 2 receives a large external force, the positioning block 33 and the limiting sleeve 34 on the side of the push-pull rod 2 moving direction abut against each other, preventing the liquid between the two ends of the piston 3 from flowing, thereby "locking" the push-pull rod 2 and preventing it from being pushed and pulled quickly. In other words, this damping cylinder can force the user to train smoothly.

[0013] The flow path of the liquid between the two ends of the piston 3 is as follows: it enters the space between the limiting sleeve 34 and the positioning block 33 from one side of the overflow hole 1, then enters the overflow hole 35 on the other side through the overflow hole 2 36, and finally enters the other side of the piston 3. When one of the limiting sleeves 34 and the positioning block 33 abuts against each other, the flow of liquid between the two sides of the piston 3 is restricted, thereby realizing the locking of the damping cylinder, that is, the limitation of the push-pull speed.

[0014] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A bidirectional damping cylinder on a fitness machine, characterized in that, The device includes a cylinder body (1), a push-pull rod (2), and a piston (3). Two damping springs (4) are fitted on the push-pull rod (2) and located at both ends of the piston (3). The piston (3) includes a rubber sleeve (31), an inner sleeve (32), a positioning block (33) fixed on the push-pull rod (2), and two limiting sleeves (34) fixed at both ends of the inner sleeve (32). The rubber sleeve (31) is fitted outside the inner sleeve (32), and the positioning block (33) is located at the two limiting sleeves. Between the sleeves (34), there is an overflow hole one (35) between the limiting sleeve (34) and the push-pull rod (2), and there is an overflow hole two (36) between the positioning block (33) and the inner wall of the inner sleeve (32). A reset spring (37) is connected between the positioning block (33) and the two limiting sleeves (34). The limiting sleeve (34) can abut against the positioning block (33) to separate the overflow hole one (35) and the overflow hole two (36) on the limiting sleeve (34).

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