DOUBLE DRAWCORD WINDING DEVICE

Abstract

A double drawcord winding device has a belt pulley supported by a belt pulley bearing to mount on a webbing wheel shaft, two one-way bearings disposed on two sides of the belt pulley bearing, a second shaft sleeve securely mounted on the belt pulley and mounted around the one-way bearings, two winding devices disposed on two sides of the belt pulley and each having a first shaft sleeve extended toward the belt pulley, inserted into and mounted in one of the one-way bearings, each winding device having a winding bearing, a pull cord and a coil spring with two ends, two locating sleeves mounted on the webbing wheel shaft and mounted in the winding devices, one of the two ends of the coil spring connected to the locating sleeve, and other end connected to the winding device.

Claims

1. A double drawcord winding device, and characterized in that the double drawcord winding device comprises: a belt pulley disposed on a webbing wheel shaft and supported by a belt pulley bearing; two one-way bearings respectively disposed on two sides of the belt pulley bearing; a second shaft sleeve securely mounted on the belt pulley and having an inner hole securely mounted around exteriors of the one-way bearings; two winding devices respectively disposed on two sides of the belt pulley, and each winding device having a first shaft sleeve extended toward the belt pulley, inserted into and securely mounted in one of the two one-way bearings; each one of the winding devices disposed on the webbing wheel shaft and supported by a winding bearing; each one of the winding devices having a pull cord; two locating sleeves securely mounted on the webbing wheel shaft and respectively mounted in the two winding devices; and each one of the winding devices having a coil spring, the coil spring having two ends, one of the two ends connected to the locating sleeve that is mounted in the winding device, and other one of the two ends connected to the winding device.

2. The double drawcord winding device as claimed in claim 1, wherein each one of the winding devices has an annular groove; and a pull cord is disposed in the annular groove of each one of the winding devices and has an end securely connected to the corresponding winding device.

3. The double drawcord winding device as claimed in claim 2, wherein each pull cord is closer to the belt pulley than the coil spring of the winding device.

4. The double drawcord winding device as claimed in claim 1, wherein the belt pulley is disposed farther from one of the two winding devices and closer to the other one of the two winding devices.

5. The double drawcord winding device as claimed in claim 1, wherein one of the locating sleeves is formed with the webbing wheel shaft by welding, casting or engaging; the other one of the locating sleeves is mounted around the webbing wheel shaft and has an anti-rotation surface; the webbing wheel shaft has an anti-rotation surface engaging with the anti-rotation surface of the locating sleeve that is mounted around the webbing wheel shaft; and a limit circlip is sleeved on the webbing wheel shaft and is held the locating sleeve that has the anti-rotation surface.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] FIG. 1 is an exploded side view of a double drawcord winding device in accordance with the present invention;

[0026] FIG. 2 is a side view in partial section of the double drawcord winding device of the present invention;

[0027] FIG. 3 is side view of the double drawcord winding device of the present invention;

[0028] FIG. 4 is a perspective view of a webbing wheel shaft and two locating sleeves of the double drawcord winding device;

[0029] FIG. 5 is an enlarged perspective view of one of the two locating sleeves with an anti-rotation surface;

[0030] FIG. 6 is a cross sectional side view of the webbing wheel shaft and the two locating sleeves of the double drawcord winding device; and

[0031] FIG. 7 is a perspective view of the double drawcord winding device of the present invention disposed on a stand of a rowing machine.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0032] In order to illustrate the technical solutions of the present invention more clearly, the accompanying drawings required in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, which are very important in the art. For those skilled in the art, other embodiments can also be obtained according to these drawings without any creative effort. In order to facilitate the understanding of the present utility model, the present utility model will be described in more detail below with reference to the accompanying drawings and specific embodiments.

[0033] It should be noted that when an element is referred to as being “fixed to” another element, it can be directly on the other element, or one or more intervening elements may be present therebetween. When an element is referred to as being “connected” to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms “upper”, “lower”, “inner”, “outer”, “bottom”, etc. used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention. The present invention and simplified description, rather than indicating or implying that the indicated device or element must have a particular orientation, be constructed and operate in a particular orientation, should not be construed as a limitation of the present invention. Furthermore, the terms “first”, “second”, “third”, etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

[0034] As shown in FIGS. 1, 2, and 3:

[0035] A webbing wheel shaft 2 has a belt pulley bearing 9 mounted around thereof at a middle part of the webbing wheel shaft 2.

[0036] A belt pulley 8 has a second shaft sleeve 81 securely mounted on the belt pulley 8, and the second shaft sleeve 81 has an inner hole securely mounted around an exterior of the belt pulley bearing 9. Then the belt pulley 8 is supported by the belt pulley bearing 9 to dispose on the webbing wheel shaft 2.

[0037] The belt pulley bearing 9 supports the belt pulley 8 to improve the stability and strength of the structure of the present invention, and the displacement problem of the belt pulley 8 under heavy load is fundamentally solved.

[0038] Two one-way bearings 7 are respectively disposed on two sides of the belt pulley bearing 9 and are mounted around the webbing wheel shaft 2.

[0039] The inner hole of the second shaft sleeve 81 is securely mounted around exteriors of the two one-way bearings 7.

[0040] Two winding devices 50 are respectively disposed on two sides of the belt pulley 8, and each winding device 50 has a box 5, a cover 1, a first shaft sleeve 51, a locating sleeve 21, 10, and a coil spring 3.

[0041] The cover 1 is connected to the box 5 to form a winding space.

[0042] The box 5 has a first shaft sleeve 51 extended toward the belt pulley 8, and the first shaft sleeve 51 is inserted into and mounted in one of the two one-way bearings 7. The first shaft sleeve 51 has an inner wall mounted around the webbing wheel shaft 2 without contacting with the webbing wheel shaft 2.

[0043] A winding bearing 4 is securely mounted on the webbing wheel shaft 2, and the box 5 is securely mounted around the winding bearing 4. Then the box 5 is disposed on the webbing wheel shaft 2 by the winding bearing 4, and the winding device 50 is supported by the winding bearing 4 on the webbing wheel shaft 2 and can rotate in both directions around the webbing wheel shaft 2.

[0044] In addition, due to the support of the winding bearing 4 and the inner wall of the first shaft sleeve 51 is mounted around the webbing wheel shaft 2 without contacting with the webbing wheel shaft 2, when the first shaft sleeve 51 is forced to rotate, the first shaft sleeve 51 is not collide and scratch with the webbing wheel shaft 2, so it is safe and avoids the reduction of equipment life.

[0045] The box 5 has an annular groove 52 formed around the box 5, and a pull cord 6, may be a belt, is mounted in the annular groove 52 and has an end securely connected to the box 5.

[0046] The belt pulley 8 on the second shaft sleeve 81 is not located in the middle of the two winding devices 50, but is farther from a left side winding device 50 and is closer to a right side winding device 50. The belt pulley bearing 9 and the two one-way bearings 7 are disposed in the second shaft sleeve 81 and are not limited by the location of the belt pulley 8. So the belt pulley 8 can be designed in the middle of the winding devices 50, or can be offset as shown in the figures of the present invention. This is more suitable for fitness equipment with different structures, for example, the positions of the two pull cords 6 are not asymmetrical with the load position of the fitness equipment.

[0047] As shown in FIGS. 4, 5, and 6:

[0048] The webbing wheel shaft 2 has two locating sleeves 21, 10. One of the locating sleeves 21 is formed with the webbing wheel shaft 2 by welding, casting, engaging, etc., the other one of the locating sleeves 10 has an anti-rotation surface 101, and the webbing wheel shaft 2 has an anti-rotation surface 22. When the locating sleeve 10 is mounted on the webbing wheel shaft 2, the anti-rotation surface 101 engages with the anti-rotation surface 22, and a limit circlip 11 is sleeved on the webbing wheel shaft 2 and is held the locating sleeve 10.

[0049] As shown in FIG. 2:

[0050] Each one of the two locating sleeves 21, 10 is mounted in the winding space between the cover 1 and the box 5 of one of the two winding devices 50. Each winding device 50 has a coil spring 3, the coil spring 3 is disposed in the winding space between the cover 1 and the box 5. In one of the winding devices 50, the coil spring 3 has an end connected to the locating sleeve 21 and another end connected to an inner wall of the box 5. In the other one of the winding devices 50, the coil spring 3 has an end connected to the locating sleeve 10 and another end connected to an inner wall of the box 5.

[0051] The annular groove 52 is disposed closer to the belt pulley 8 than the winding space that is formed between the cover 1 and the box 5. That is, the pull cord 6 is disposed closer to the belt pulley 8 than the coil spring 3.

[0052] In use, as shown in FIG. 7:

[0053] The webbing wheel shaft 2 is securely connected to an equipment 12, and the equipment 12 may be a rowing machine or the like.

[0054] The pull cords 6 are pulled out by a user to drive the winding devices 5 to rotate, and the coil springs 3 are deformed.

[0055] At the same time, the rotations of the first shaft sleeves 51 on the boxes drive the one-way bearings 7, and the one-way bearings 7 drive the second shaft sleeve 81 to rotate. Then the belt pulley 8 is rotated with the second shaft sleeve 81 and a belt of the belt pulley 8 resists loads such as the blades of the rowing machine.

[0056] When the user releases the pull cords 6, the coil springs 3 are reset, the boxes 5 are reversely rotated, and the pull cords 6 are rewound into the annular grooves 51. Since the one-way bearings 7 rotate in one direction, the belt pulley 8 does not rotate. An action is completed.

[0057] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.