Ultrathin pullback device and rowing machine

Abstract

The utility model discloses an ultrathin pullback device and rowing machine, including turntable subassembly, casing and connecting shaft, turntable subassembly and casing rotatablely sleeve on the connecting shaft, turntable subassembly includes turntable and the hollow shaft sleeve that is connected on turntable and extends towards the casing direction, the casing is equipped with the pull rope and the spiral spring, and the spiral spring is equipped with the pull rope and the spiral spring. The inner end and the outer end of the spiral spring are fixedly connected with the connecting shaft and the shell respectively, a bearing sleeve is installed between the shell and the connecting shaft, a through stepped inner cavity is formed in the bearing sleeve and comprises a first cylindrical cavity and a second cylindrical cavity which are coaxial, the diameter of the first cylindrical cavity is smaller than that of the second cylindrical cavity, and the diameter of the second cylindrical cavity is smaller than that of the second cylindrical cavity. A first supporting bearing is installed in the first cylindrical cavity, a one-way bearing is installed in the second cylindrical cavity, inner rings of the first supporting bearing and the one-way bearing are fixedly connected with the hollow shaft sleeve, and outer rings of the first supporting bearing and the one-way bearing are fixedly connected with the bearing sleeve. The whole structure and assembly of the pullback device are more reasonable and compact, and the product thickness is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rowing machines, in particular to an ultra-thin pullback device and a rowing machine. Background Art

[0002] A rowing machine, also known as a rowing machine, is a fitness equipment that simulates rowing. The puller is the core component of the rowing machine. The existing puller is relatively thick, resulting in a larger overall size of the rowing machine, occupying a larger space, and making it impossible for the storage cabinet to store a large number of rowing machines. As a result, the number of rowing machines loaded in a single container is small, and the transportation cost is high. Utility Model Content

[0003] The utility model aims to provide an ultra-thin puller to solve the above-mentioned technical problems.

[0004] To achieve the above-mentioned purpose, the technical solution of the utility model is: an ultra-thin retractor, comprising a turntable assembly, a shell and a connecting shaft, the turntable assembly and the shell are rotatably mounted on the connecting shaft, the turntable assembly comprises a turntable and a hollow sleeve connected to the turntable and extending toward the shell, a tension rope and a worm spring are installed on the shell, the inner and outer ends of the worm spring are respectively fixedly connected to the connecting shaft and the shell, a bearing sleeve is installed between the shell and the connecting shaft, a through stepped inner cavity is formed inside the bearing sleeve, the stepped inner cavity comprises a coaxial first cylindrical cavity and a second cylindrical cavity, the diameter of the first cylindrical cavity is smaller than that of the second cylindrical cavity, a first support bearing is installed in the first cylindrical cavity, a one-way bearing is installed in the second cylindrical cavity, the inner rings of the first support bearing and the one-way bearing are respectively fixedly connected to the hollow sleeve, and the outer rings of the first support bearing and the one-way bearing are respectively fixedly connected to the bearing sleeve.

[0005] Preferably, the distance between the outer side of the turntable assembly and the outer side of the housing is no more than 72 cm.

[0006] Preferably, a second support bearing is installed in the second cylindrical cavity, the inner ring and outer ring of the second support bearing are fixedly connected to the hollow sleeve and the bearing sleeve respectively, the first support bearing and the second support bearing are respectively located on two sides of the one-way bearing facing away from each other, and the size of the first support bearing is smaller than that of the second support bearing.

[0007] Preferably, a third support bearing is installed in the first cylindrical cavity, the inner ring and outer ring of the third support bearing are fixedly connected to the connecting shaft and the bearing sleeve respectively, and the third support bearing is located on the side of the first support bearing away from the one-way bearing; a fourth support bearing is installed between the turntable and the connecting shaft, and the inner ring and outer ring of the fourth support bearing are fixedly connected to the connecting shaft and the turntable respectively.

[0008] Preferably, a first through hole connected to the hollow sleeve is opened in the center of the turntable, a second through hole is opened in the shell, and the connecting shaft is sequentially arranged through the first through hole, the hollow sleeve, and the second through hole, and the circumferential outer wall of the bearing sleeve is fixedly connected to the circumferential inner wall of the second through hole.

[0009] Preferably, a fixing seat is installed on the connecting shaft, and the inner end of the spiral spring is fixedly connected to the connecting shaft through the fixing seat.

[0010] Preferably, the shell includes an outer shell and a shell cover, the outer shell includes an annular portion and an expansion disk located on the side of the annular portion away from the turntable assembly, the tension rope is wound around the annular portion, and the shell cover is detachably mounted on the expansion disk, the expansion disk and the shell cover cooperate with each other to form an accommodating cavity, and the spiral spring is installed in the accommodating cavity.

[0011] Preferably, the tension rope is a flat belt-shaped tension rope, and the tension rope is wrapped around the annular portion layer by layer from the inside to the outside.

[0012] Preferably, the tension rope is a cylindrical tension rope, and a spiral groove is formed on the outer wall of the annular portion. The tension rope and the spiral groove correspond to each other so that the tension rope is spirally wound around the annular portion.

[0013] The utility model also provides a rowing machine, comprising any one of the above-mentioned ultra-thin pullers.

[0014] The utility model has the following beneficial effects:

[0015] The utility model includes a turntable assembly, a shell and a connecting shaft. The turntable assembly and the shell are rotatably sleeved on the connecting shaft. The turntable assembly includes a turntable and a hollow shaft sleeve connected to the turntable and extending toward the shell. A tension rope and a worm spring are installed on the shell. The inner and outer ends of the worm spring are fixedly connected to the connecting shaft and the shell respectively. A bearing sleeve is installed between the shell and the connecting shaft. A through stepped inner cavity is formed inside the bearing sleeve. The stepped inner cavity includes a coaxial first cylindrical cavity and a second cylindrical cavity. The diameter of the first cylindrical cavity is smaller than that of the second cylindrical cavity. A first support bearing is installed in the first cylindrical cavity. A one-way bearing is installed in the second cylindrical cavity. The inner rings of the first support bearing and the one-way bearing They are fixedly connected to the hollow shaft sleeve respectively, and the outer rings of the first support bearing and the one-way bearing are fixedly connected to the bearing sleeve respectively, which makes the assembly of the turntable assembly and the shell on the connecting shaft more compact, and the overall structure and assembly are also more reasonable, compact and stable, thereby reducing the thickness of the puller, and the setting of the stepped inner cavity of the bearing sleeve makes the axial thickness and radial height of the first support bearing further reduced, further reducing the overall thickness of the puller, making the overall volume of the rowing machine smaller and occupying less space, so that the storage cabinet can store a larger number of rowing machines, and the rowing machine can be loaded into the cabinet in a single delivery, reducing the number of deliveries and reducing transportation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of embodiment 1 of the present utility model.

[0017] Figure 2 It is a front view of embodiment 1 of the present utility model.

[0018] Figure 3 It is a side view of embodiment 1 of the present utility model.

[0019] Figure 4 It is a cross-sectional view of embodiment 1 of the present invention.

[0020] Figure 5 It is an exploded schematic diagram of Example 1 of the present utility model.

[0021] Figure 6 It is a structural schematic diagram of the turntable of Example 1 of the present utility model.

[0022] Figure 7 It is a structural schematic diagram of the shell of Example 1 of the present utility model.

[0023] Figure 8 It is a structural schematic diagram of the bearing sleeve of Example 1 of the present utility model.

[0024] Figure 9 It is a structural diagram of embodiment 2 of the present utility model.

[0025] The accompanying drawings are marked: 1 turntable, 2 hollow sleeve, 3 shell, 31 annular portion, 32 expansion disk, 33 shell cover, 4 connecting shaft, 5 bearing sleeve, 6 tension rope, 7 volute spring, 8 first through hole, 9 second through hole, 10 stepped inner cavity, 101 first cylindrical cavity, 102 second cylindrical cavity, 11 one-way bearing, 12 first support bearing, 13 second support bearing, 14 third support bearing, 15 fourth support bearing, 16 fixed seat. DETAILED DESCRIPTION

[0026] To further illustrate various embodiments, the present invention is provided with accompanying drawings. These drawings form part of the disclosure of this invention and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, those skilled in the art will understand other possible implementations and the advantages of this invention. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.

[0027] In the description of this utility model, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0029] See Figure 1-8 As shown, as an embodiment of the present invention, an ultra-thin retractor is provided, including a turntable assembly, a shell 3 and a connecting shaft 4. The turntable assembly and the shell 3 are rotatably sleeved on the connecting shaft 4. The turntable assembly includes a turntable 1 and a hollow sleeve 2 connected to the turntable 1 and extending toward the shell 3. A first through hole 8 communicating with the hollow sleeve 2 is opened in the center of the turntable 1, and a second through hole 9 is opened in the shell 3. The connecting shaft 4 is sequentially penetrated through the first through hole 8, the hollow sleeve 2, and the second through hole 9. The circumferential outer wall of the bearing sleeve 5 is fixedly connected to the circumferential inner wall of the second through hole 9. A tension rope 6 and a worm spring 7 are installed on the shell 3. The inner and outer ends of the worm spring 7 are respectively connected to the connecting shaft 4 and the shell 3 is fixedly connected. A bearing sleeve 5 is installed between the housing 3 and the connecting shaft 4. A through stepped inner cavity 10 is formed inside the bearing sleeve 5. The stepped inner cavity 10 includes a coaxial first cylindrical cavity 101 and a second cylindrical cavity 102. The diameter of the first cylindrical cavity 101 is smaller than that of the second cylindrical cavity 102. A first support bearing 12 is installed in the first cylindrical cavity 101, and a one-way bearing 11 is installed in the second cylindrical cavity 102. The inner rings of the first support bearing 12 and the one-way bearing 11 are respectively fixedly connected to the hollow sleeve 2, and the outer rings of the first support bearing 12 and the one-way bearing 11 are respectively fixedly connected to the bearing sleeve 5. The distance between the outer side of the turntable assembly and the outer side of the housing 3 is not more than 72 cm.

[0030] The ultra-thin retractor of the present invention is used in a rowing machine. When the user applies force to pull the tension rope 6, the turntable 1 rotates forward, thereby synchronously driving the one-way bearing 11 and the turntable assembly to rotate forward, and the worm spring 7 is compressed to store force. After the external force is removed, the turntable 1 rotates in the opposite direction under the elastic force of the worm spring 7, and the tension rope 6 is restored and wound around the shell 3. This operation is repeated to achieve the purpose of fitness. The structural arrangement of the turntable assembly, housing 3, and bearing sleeve 5 of this technical solution makes the assembly of the turntable assembly and the housing 3 on the connecting shaft 4 more compact, and the overall structure and assembly are also more reasonable, compact and stable, thereby reducing the thickness of the puller, so that the thickness of the puller is no more than 72 cm. The thickness of the puller refers to the distance between the outer side of the turntable assembly and the outer side of the housing 3, and the arrangement of the stepped inner cavity 10 of the bearing sleeve 5 further reduces the axial thickness and radial height of the first support bearing 12, further reducing the overall thickness of the puller, making the overall volume of the rowing machine smaller and occupying less space, so that the storage cabinet can store a larger number of rowing machines, and the rowing machine can be loaded in a single cabinet. Specifically, the loading capacity can be increased by more than 40%, reducing the number of conveyances and reducing transportation costs.

[0031] In this embodiment, a second support bearing 13 is installed in the second cylindrical cavity 102. The inner ring and outer ring of the second support bearing 13 are fixedly connected to the hollow sleeve 2 and the bearing sleeve 5 respectively. The first support bearing 12 and the second support bearing 13 are respectively located on the two sides away from each other of the one-way bearing 11, thereby ensuring the support stability during the relative rotation process between the turntable assembly and the housing 3. The size of the first support bearing 12 is smaller than that of the second support bearing 13, which ensures the support stability while reducing the overall thickness of the puller.

[0032] In this embodiment, a third support bearing 14 is mounted within the first cylindrical cavity 101. The inner and outer rings of the third support bearing 14 are fixedly connected to the connecting shaft 4 and the bearing sleeve 5, respectively. The third support bearing 14 is located on the side of the first support bearing 12 away from the one-way bearing 11, thereby ensuring the rotation and support stability of the housing 3 on the connecting shaft 4. A fourth support bearing 15 is mounted within the first through hole 8. The inner and outer rings of the fourth support bearing 15 are fixedly connected to the connecting shaft 4 and the turntable 1, respectively, thereby ensuring the rotation and support stability of the turntable assembly on the connecting shaft 4.

[0033] In this embodiment, the first, second, third and fourth support bearings 15 are all deep groove ball bearings, which reduces the noise of the retractor while ensuring its service life, making it more economical and durable.

[0034] In this embodiment, the shell 3 includes an outer shell and a shell cover 33. The outer shell includes an annular portion 31 and an expansion disk 32 located on the side of the annular portion 31 away from the turntable assembly. The annular portion 31 corresponds to the outside of the hollow sleeve 2. The tension rope 6 is wound around the annular portion 31. The shell cover 33 is detachably installed on the expansion disk 32. The expansion disk 32 and the shell cover 33 cooperate with each other to form an accommodating cavity. The spiral spring 7 is installed in the accommodating cavity. The structural layout is reasonable and compact, which further reduces the thickness and height of the retractor and facilitates assembly.

[0035] In this embodiment, a fixing seat 16 is installed on the connecting shaft 4. The fixing seat 16 corresponds to the accommodating cavity. The inner end of the worm spring 7 is fixedly connected to the connecting shaft 4 through the fixing seat 16 to ensure the installation stability of the worm spring 7.

[0036] In this embodiment, the tension rope 6 is a flat belt-shaped tension rope 6 , and the tension rope 6 is wrapped around the annular portion 31 layer by layer from the inside to the outside.

[0037] Of course, in other cases, the installation direction of the one-way bearing 11 can be adjusted in the reverse direction as needed, and can provide rebound force in both directions. The connecting shaft 4 can also be lengthened for combined use in the assembly.

[0038] The utility model further provides a rowing machine, comprising the ultra-thin puller described in the above embodiment 1.

[0039] Example 2: For the sake of brevity, this example mainly describes the differences from Example 1.

[0040] See Figure 9 As shown, as an embodiment of the present invention, an ultra-thin puller is provided, the tension rope 6 is a cylindrical tension rope 6, and a spiral groove is formed on the outer wall of the annular portion 31. The tension rope 6 corresponds to the spiral groove so that the tension rope 6 is spirally wound on the annular portion 31, thereby meeting the demand for a larger pullback distance.

[0041] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims shall fall within the scope of protection of the present invention.

Claims

1. An ultra-thin retractor, characterized by: The cam is secured to the cam face and is adapted to engage said guide rails, wherein the guide rails are secured to a position detachably mounted on said cam face. The cams are secured to a position detachably mounted on said cam face.

2. The ultra-thin retractor according to claim 1, characterized in that: The distance between the outer side of the turntable assembly and the outer side of the shell is not greater than 72 cm.

3. The ultra-thin retractor according to claim 1, characterized in that: A second support bearing is installed in the second cylindrical cavity. The inner ring and outer ring of the second support bearing are fixedly connected to the hollow sleeve and the bearing sleeve respectively. The first support bearing and the second support bearing are respectively located on two sides of the one-way bearing away from each other. The size of the first support bearing is smaller than that of the second support bearing.

4. The ultra-thin retractor according to claim 1, characterized in that: A third support bearing is installed in the first cylindrical cavity, and the inner ring and outer ring of the third support bearing are fixedly connected to the connecting shaft and the bearing sleeve respectively. The third support bearing is located on the side of the first support bearing away from the one-way bearing; a fourth support bearing is installed between the turntable and the connecting shaft, and the inner ring and outer ring of the fourth support bearing are fixedly connected to the connecting shaft and the turntable respectively.

5. The ultra-thin retractor according to claim 1, characterized in that: A first through hole connected to the hollow sleeve is provided in the center of the turntable, a second through hole is provided in the shell, and the connecting shaft is sequentially arranged through the first through hole, the hollow sleeve and the second through hole, and the circumferential outer wall of the bearing sleeve is fixedly connected to the circumferential inner wall of the second through hole.

6. The ultra-thin retractor according to claim 1, characterized in that: A fixing seat is installed on the connecting shaft, and the inner end of the worm spring is fixedly connected to the connecting shaft through the fixing seat.

7. The ultra-thin retractor according to claim 1, characterized in that: The shell includes an outer shell and a shell cover. The outer shell includes an annular portion and an expansion disk located on the side of the annular portion away from the turntable assembly. The tension rope is wound around the annular portion. The shell cover is detachably mounted on the expansion disk. The expansion disk and the shell cover cooperate with each other to form an accommodating cavity, and the spiral spring is installed in the accommodating cavity.

8. The ultra-thin retractor according to claim 7, characterized in that: The tension rope is a flat belt-shaped tension rope, and the tension rope is wrapped around the ring part layer by layer from the inside to the outside.

9. The ultra-thin retractor according to claim 7, characterized in that: The tension rope is a cylindrical tension rope, and a spiral groove is formed on the outer wall of the annular portion. The tension rope and the spiral groove are matched with each other so that the tension rope is spirally wound on the annular portion.

10. A rowing machine, characterized in that: The invention comprises the ultra-thin puller according to any one of claims 1 to 9.

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