Resistor with centrifugal clutch function

Abstract

The utility model discloses a resistor with a centrifugal clutch function, and relates to the technical field of pull rope resistance, the resistor comprises a centrifugal clutch, a reset spring structure and a wire spool, the output end of the reset spring structure is connected with the wire spool, a pull rope is wound around the wire spool, and the end of the pull rope is connected to a load; the reset spring structure provides reset force for the pull rope after the pull rope is pulled out, the fixed portion of the centrifugal clutch is connected to the wire spool, the outer side of the movable portion of the centrifugal clutch is covered with an annular brake face, and the movable portion and the annular brake face are in movable lap joint. The centrifugal force generated during pulling affects the centrifugal clutch to act on the annular brake surface to generate a speed reduction effect; when the pull rope is retracted, under the action of the reset spring structure, the centrifugal clutch does not act so as to keep the original reset speed, so that the retracting and releasing speed of the pull rope meets the actual use requirement; the coil spring is preferably a constant-torque spring, and the reset spring structure can provide constant output force for the pull rope.

Description

Technical Field

[0001] The present application relates to the technical field of rope resistance, and in particular to a resistor with a centrifugal clutch function. Background Art

[0002] The pull rope structure with reset function is widely used in many fields such as dog leashes, cables, sports and fitness equipment. Its core feature is that it can achieve stretching and automatic recovery, providing user convenience and safety. Application in dog leash Pet leash is one of the typical applications of pull rope structure with reset function. When the pet moves freely within a certain range, the leash can automatically extend, and when the pet approaches or stops moving, the excess rope will be automatically recovered to keep it tidy; in industrial or outdoor adventure activities, the cable with reset function also plays an important role. In scenes such as aerial work, rock climbing, and rescue, this cable can be used as a safety rope. When the person moves, the cable automatically extends, and when the movement stops or danger occurs, the cable will quickly lock to provide immediate protection; Application in sports and fitness equipment In gyms or home fitness equipment, the pull rope structure with reset function is often used in resistance training equipment, such as elastic bands, rowing machines, elliptical machines, etc. These devices use the elasticity of the pull rope to provide resistance and simulate the muscle training effect in real sports. The pull rope structure with reset function allows the user to automatically return to the initial position after completing an action cycle without manual adjustment, thereby improving the continuity and efficiency of training and reducing the risk of sports injuries.

[0003] The pulling-out speed and retrieving speed of the existing pull rope structure are consistent, which does not meet the functional requirements under specific applications. If it is applied to a dog leash, in order to prevent the pet from bursting out, the pulling-out speed of the pull rope should be lower than the retrieving speed, that is, a certain damping effect is produced on the pull rope when it is pulled out; if it is applied to resistance training equipment, a damping effect needs to be provided when the pull rope is pulled out, and when the pull rope is reset, it needs to return to its original position in a timely manner and a faster pulling-back speed is required; therefore, the pull rope structure should be provided with a damping structure that can be intervened in a directionally. In addition, the size of the damping force needs to be able to be adjusted according to the specific application scenario. Utility Model Content

[0004] The device provides a resistor with a centrifugal clutch function, and the specific implementation is as follows:

[0005] A resistor with centrifugal clutch function, comprising:

[0006] A return spring structure and a winding drum, wherein the output end of the return spring structure is connected to the winding drum, a pull rope is wound around the winding drum, the end of the pull rope is connected to the load, and the return spring structure provides a return force for the pull rope after it is pulled out;

[0007] The centrifugal clutch has a fixed part connected to the winding disk, and an annular brake surface is provided on the outer side of the movable part, and the movable part and the annular brake surface are flexibly overlapped. The centrifugal clutch provides a friction deceleration effect between the pull rope and the annular brake surface for the one-way rapid pulling of the pull rope.

[0008] Based on the above technical solutions, the synergistic effect of the centrifugal clutch and the return spring structure is the key to achieving the speed control of the rope retraction and release. When the rope is pulled out, it will drive the internal mechanism to rotate and generate centrifugal force. The magnitude of the centrifugal force is proportional to the rope pulling speed. When the centrifugal force reaches a certain threshold, the centrifugal clutch begins to work, contacts the annular brake surface and generates friction, thereby applying braking force to the rotating mechanism and slowing down the rope pulling speed. Natural reset during rope recovery When the rope needs to be recovered, the return spring structure begins to work. The return spring pushes the rope to move in the recovery direction through its stored elastic potential energy. In this process, the centrifugal force of the centrifugal clutch is not stimulated, so the centrifugal clutch does not produce additional braking effect, allowing the rope to be recovered at a natural speed. The synergy between the centrifugal clutch and the return spring structure provides dynamic speed control for the rope with reset function, which enables it to show excellent performance and wide application value in many fields such as pet traction, outdoor adventure, and fitness equipment.

[0009] Preferably, it also includes a frame for installing a reset spring structure, a centrifugal clutch and a winding disk. The reset spring structure includes a storage wheel and a power wheel connected by a coil spring, and both are axially extended with a second rotating shaft and a first rotating shaft, which are respectively connected to the frame through the rotating shafts.

[0010] Preferably, a plurality of coil springs are provided, which are evenly and equidistantly arranged along the axial direction of the storage wheel, and two ends of each coil spring are respectively wound around the storage wheel and the power wheel.

[0011] Preferably, the power wheel, the first rotating shaft, the winding disc and the centrifugal clutch are coaxially arranged.

[0012] Based on the above technical solution, the coil spring is preferably a constant torque spring, and the reset spring structure can provide a constant output force for the pull rope, thereby ensuring the consistency of speed in the entire pulling state or the entire retracting state.

[0013] Preferably, the centrifugal clutch includes a fixed seat connected to the first rotating shaft, the fixed seat is provided with a plurality of arc pressure plates along its circumferential rotation, and a spring is provided at the rotating position, and it also includes a friction surface installed on the frame, the friction surface is sleeved on the outer side of the fixed seat, and the back of the arc pressure plate and the friction surface are in the same vertical plane.

[0014] Preferably, the centrifugal clutch further comprises a reducing ring, the friction surface is arranged on the inner side of the reducing ring, and the reducing ring is provided with a radial reset structure.

[0015] Preferably, it also includes a brake belt, one end of which is fixed to the crossbeam of the frame, and the other end is threadedly connected to another crossbeam through an adjusting screw.

[0016] Preferably, an annular groove is provided on the outer peripheral surface of the reducer ring, and the middle section of the brake band is wound around the annular groove.

[0017] Based on the above technical solution, the reducing ring is a conventional reducing structure, which is composed of an inner arc block and an outer arc block that are slidably connected to each other, and a spring structure is installed between the two; the end of the brake band is set to be rope-shaped and connected to the adjusting screw, and the adjusting screw is threaded to the crossbeam to adjust the brake band tension.

[0018] In summary, this application includes the following beneficial technical effects:

[0019] 1. The utility model produces a deceleration effect by causing the centrifugal clutch to act on the annular brake surface under the influence of the centrifugal force generated when the pull rope is pulled out; when the pull rope is retracted, under the action of the reset spring structure, the centrifugal clutch does not act and maintains the original reset speed, so that the retraction and release speed of the pull rope meets the actual use requirements;

[0020] 2. The utility model has a simple structure, the coil spring is preferably a constant torque spring, and the return spring structure can provide a constant output force for the pull rope, thereby ensuring the consistency of speed in the entire pulling state or the entire retracting state;

[0021] 3. The utility model adjusts the tension of the brake band by adjusting the screw, so that it acts on the reducer ring to change the initial spacing between the friction surface and the arc pressure plate, so as to adjust the deceleration force. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] Figure 2 It is a schematic diagram of the structure of the utility model after the frame is removed;

[0024] Figure 3 This utility model Figure 2 Schematic diagram of explosion structure in ;

[0025] Figure 4 It is a structural schematic diagram of the centrifugal clutch in the utility model;

[0026] Figure 5 It is a front structural schematic diagram of the centrifugal clutch in the utility model.

[0027] Description of reference numerals:

[0028] 1. frame, 2. brake belt, 3. first rotating shaft, 4. second rotating shaft, 5. reset spring structure, 6. pull rope, 7. damping adjustment screw, 8. winding disk, 9. centrifugal clutch, 101. beam, 102. side plate, 201. fixed end, 202. movable end, 501. storage wheel, 502. coil spring, 503. power wheel, 901. reducing ring, 902. fixing seat, 903. arc pressure plate, 904. friction surface, 905. annular groove, 906. spring. DETAILED DESCRIPTION

[0029] The following describes the specific implementation of the utility model in conjunction with the accompanying drawings and embodiments:

[0030] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0031] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of the implementation of the present utility model without substantially changing the technical content.

[0032] The following is combined with Figure 1-5 This application is described in further detail.

[0033] The embodiment of the present application discloses a resistor with a centrifugal clutch function.

[0034] Example 1

[0035] Reference Figures 1 to 3 The present embodiment discloses a resistor with a centrifugal clutch function, comprising a frame 1, a centrifugal clutch 9, a reset spring structure 5 and a winding drum 8. The output end of the reset spring structure 5 is connected to the winding drum 8. A pull rope 6 is wound around the winding drum 8. The end of the pull rope 6 is connected to the load. In the present structure, the fixed part of the centrifugal clutch 9 is connected to the winding drum 8, and an annular brake surface is provided on the outer side cover of the movable part, and the movable part and the annular brake surface are flexibly overlapped. The centrifugal clutch 9 provides a friction deceleration effect between the pull rope 6 and the annular brake surface for the one-way rapid pulling of the pull rope 6.

[0036] The frame 1 is a frame structure, with side plates 102 vertically arranged on both sides, and two cross beams 101 arranged in parallel in the other direction. In this structure, the frame 1 is used to install the reset spring structure 5, the centrifugal clutch 9 and the winding disk 8. The reset spring structure 5 includes a storage wheel 501 and a power wheel 503 connected by a coil spring 502, and the two are axially extended with a second rotating shaft 4 and a first rotating shaft 3, which are respectively connected to the side plates 102 through the rotating shafts.

[0037] There are three coil springs 502, which are evenly and equidistantly arranged along the axial direction of the storage wheel 501, and the two ends of each coil spring 502 are respectively wound around the storage wheel 501 and the power wheel 503. In this structure, the power wheel 503, the first rotating shaft 3, the winding disk 8 and the centrifugal clutch 9 are coaxially arranged.

[0038] The centrifugal clutch 9 includes a friction surface 904 mounted on the side plate 102, and a fixed seat 902 connected to the first rotating shaft 3. The fixed seat 902 is provided with a plurality of arc pressure plates 903 along its circumferential rotation, and a spring 906 is provided at the rotating position. In this structure, the friction surfaces 904 are sleeved on the outer side of the fixed seat 902, and the back of the arc pressure plate 903 and the friction surface 904 are in the same vertical plane.

[0039] The specific implementation process is as follows: the load end pulls the pull rope 6 to release it from the winding drum 8, during which the reset spring structure 5 is deformed and there is always a certain amount of positive and reverse damping; in this process, in addition to the reaction force of the constant torque spring, the power wheel 503 rotates forward to drive the fixed seat 902, and the centrifugal force generated by the arc pressure plate 903 is greater than the elastic force of the spring 906. At this time, the arc pressure plate 903 acts on the friction surface 904 to produce a friction effect; therefore, when the pull rope 6 is pulled out, the pull rope 6 is subjected to the superposition of the reaction force of the constant torque spring and the centrifugal clutch 9, and at this time, the pull rope 6 is released at a stable speed.

[0040] When the load end tension is removed, the centrifugal clutch 9 does not intervene to generate a force, and the pull rope 6 is only subjected to the restoring force of the constant torque spring and is quickly retracted at a speed 2 greater than speed 1 to enhance the user experience during use.

[0041] Example 2

[0042] Reference Figures 1 to 5 , and based on Example 1, this embodiment further provides a resistor with a centrifugal clutch function, further comprising a brake band 2 and a reducer ring 901, wherein the friction surface 904 of the centrifugal clutch 9 is intermittently arranged on the inner side of the reducer ring 901 in the form of an arc surface, and the reducer ring 901 has a built-in radial reset structure. In this structure, the fixed end 201 of the brake band 2 is fixed to the crossbeam 101 of the frame 1, and its movable end 202 is threadedly connected to another crossbeam 101 through an adjusting screw 7, and an annular groove 905 is provided on the outer peripheral surface of the reducer ring 901, and the middle section of the brake band 2 is wound around the annular groove 905.

[0043] The specific implementation process is to rotate the adjusting screw 7 and adjust the distance that the adjusting screw 7 extends into the cross beam 101 to adjust the tension of the brake belt 2; thereby, the diameter reducing ring 901 can be contracted or expanded, and the initial spacing between the friction surface 904 and the arc pressure plate 903 can be adjusted, thereby adjusting the size of the damping force.

[0044] Many other changes and modifications can be made without departing from the concept and scope of the utility model. It should be understood that the utility model is not limited to a specific embodiment, and the scope of the utility model is defined by the appended claims.

Claims

1. A resistor with centrifugal clutch function, characterized in that: include: A return spring structure (5) and a winding drum (8), wherein the output end of the return spring structure (5) is connected to the winding drum (8), a pull rope (6) is wound around the winding drum (8), an end of the pull rope (6) is connected to a load, and the return spring structure (5) provides a return force for the pull rope (6) after it is pulled out; A centrifugal clutch (9) has a fixed portion connected to the winding drum (8), and an outer cover of a movable portion is provided with an annular brake surface, and the movable portion and the annular brake surface are movably overlapped, and the centrifugal clutch (9) provides a friction deceleration effect between the pull rope (6) and the annular brake surface for one-way rapid pulling.

2. A resistor with centrifugal clutch function according to claim 1, characterized in that: It also includes a frame (1) for mounting the return spring structure (5), the centrifugal clutch (9) and the winding drum (8); The return spring structure (5) comprises a storage wheel (501) and a power wheel (503) connected via a coil spring (502), both of which are axially extended with a second rotating shaft (4) and a first rotating shaft (3), which are respectively connected to the frame (1) via the rotating shafts.

3. The resistor with centrifugal clutch function according to claim 2, characterized in that: A plurality of coil springs (502) are provided, which are evenly and equidistantly arranged along the axial direction of the storage wheel (501), and two ends of each coil spring (502) are respectively wound around the storage wheel (501) and the power wheel (503).

4. The resistor with centrifugal clutch function according to claim 3, characterized in that: The power wheel (503), the first rotating shaft (3), the winding disc (8) and the centrifugal clutch (9) are coaxially arranged.

5. The resistor with centrifugal clutch function according to claim 4, characterized in that: The centrifugal clutch (9) comprises a fixed seat (902) connected to the first rotating shaft (3), the fixed seat (902) is provided with a plurality of arc pressure plates (903) along its circumferential rotation, and a spring (906) is provided at the rotation position; It also includes a friction surface (904) installed on the frame (1), the friction surface (904) is sleeved on the outside of the fixing seat (902), and the back of the arc pressure plate (903) and the friction surface (904) are in the same vertical plane.

6. The resistor with centrifugal clutch function according to claim 5, characterized in that: The centrifugal clutch (9) further comprises a diameter reducing ring (901), the friction surface (904) is arranged on the inner side of the diameter reducing ring (901), and the diameter reducing ring (901) has a radial reset structure built in it.

7. The resistor with centrifugal clutch function according to claim 6, characterized in that: It also comprises a brake belt (2), one end of which is fixed on the crossbeam (101) of the frame (1), and the other end of which is threadedly connected to another crossbeam (101) via an adjusting screw (7).

8. The resistor with centrifugal clutch function according to claim 7, characterized in that: The outer peripheral surface of the reducing ring (901) is provided with an annular groove (905), and the middle section of the brake band (2) is wound around the annular groove (905).

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