Rotary mechanism and elliptical machine
Patent Information
- Application Number
- CN202521838787.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-28
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-08-28
AI Technical Summary
现有设计中存在两种常见问题：一是部分机构在旋转到特定角度时，需要额外的锁定装置来实现自锁，导致结构复杂、部件增多；二是采用内置阻尼器的机构，虽然能在特定角度自锁，但其阻尼效果同时作用于正反两个旋转方向
[0029]当椭圆机的第二架体和第一架体处于展平状态时，所述内套件、阻尼衬套和外套件的锁定孔相互对齐以供所述锁定件穿过。
Smart Images
Figure CN224777346U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of rotating mechanism technology, and particularly relates to a rotating mechanism and an elliptical machine. Background Technology
[0002] Rotating mechanisms are commonly used for folding or unfolding operations of devices. Two common problems exist in existing designs: First, some mechanisms require additional locking devices to achieve self-locking when rotated to a specific angle, leading to structural complexity and an increase in components. Second, mechanisms using built-in dampers, while capable of self-locking at a specific angle, have their damping effect acting simultaneously in both directions of rotation. This makes existing solutions insufficient for special scenarios requiring smooth operation in one direction and resistance in the other (e.g., smooth unfolding / damping only, or smooth folding / damping only). Utility Model Content
[0003] To address the shortcomings of existing technologies, a rotary mechanism is provided that can operate smoothly in one direction while providing resistance and self-locking in the other.
[0004] This utility model is achieved by the following technical solution: a rotating mechanism, characterized in that it includes:
[0005] Internal components, used to secure the first frame;
[0006] An outer kit is used to fix the second frame. The outer kit is coaxially sleeved on the outside of the inner kit and the two can rotate relative to each other to realize the unfolding or folding of the first frame and the second frame.
[0007] A damping bushing is disposed between the inner and outer sleeves. The damping bushing is made of an elastic material and has a ratchet structure on its circumferential outer or circumferential inner wall. The ratchet structure causes the inner and outer sleeves to generate different magnitudes of resistance when they rotate relative to each other clockwise and counterclockwise.
[0008] When the user operates the aforementioned rotating mechanism, the first frame and / or the second frame can be rotated to unfold or fold the first and second frames. Since the damping bushing is made of elastic material and has a ratchet structure, the ratchet structure allows for smooth operation when the first and second frames rotate in one direction with low resistance. When the user rotates in the other direction, the resistance is high, thus hindering the rotation. Furthermore, when rotation stops, the static friction between the damping bushing and the inner or outer assembly maintains a certain angle of lock between the unfolded and folded frames.
[0009] This solution utilizes a flexible damping bushing with a ratchet structure to ensure smooth rotation of the inner or outer assembly in one direction, while providing greater resistance when rotating in the other direction, thus meeting the user's needs.
[0010] Preferably, the damping bushing is sleeved and fixed on the circumferential outer wall of the inner sleeve, and a ratchet structure is disposed on the circumferential outer wall of the damping bushing; when the rotation direction of the outer sleeve relative to the inner sleeve is consistent with the tilt direction of the ratchet structure, the damping bushing undergoes elastic deformation and provides a first resistance; when the rotation direction of the outer sleeve relative to the inner sleeve is opposite to the tilt direction of the ratchet structure, the ratchet structure rubs against the inner wall of the outer sleeve and provides a second resistance greater than the first resistance; or
[0011] The damping bushing is sleeved and fixed on the circumferential inner wall of the outer sleeve, and the ratchet structure is disposed on the circumferential inner wall of the damping bushing; when the rotation direction of the outer sleeve relative to the inner sleeve is opposite to the tilt direction of the ratchet structure, the damping bushing undergoes elastic deformation and provides a first resistance; when the rotation direction of the outer sleeve relative to the inner sleeve is consistent with the tilt direction of the ratchet structure, the ratchet structure rubs against the inner wall of the outer sleeve and provides a second resistance greater than the first resistance.
[0012] Preferably, the inner sleeve is fixed to the damping bushing, and a radially recessed and protruding insertion structure is provided between the circumferential outer wall of the inner sleeve and the damping bushing; or
[0013] The outer sleeve is fixed to the damping bushing, and a radially concave-convex insertion fit structure is provided between the circumferential inner wall of the outer sleeve and the damping bushing.
[0014] The damping bushing is fixed to the outer or inner assembly to prevent slippage during rotation. The radially recessed interlocking structure further prevents the damping bushing from rotating circumferentially when the outer assembly rotates, ensuring the safety of the entire rotating mechanism.
[0015] Preferably, the outer kit includes a first outer kit and a second outer kit that are separately configured, and the first outer kit and the second outer kit are connected by a locking thread;
[0016] By screwing the locking member, the screwing depth is changed, and the radial compression of the first and second outer sleeves on the damping bushing fitted inside them is adjusted; thereby controlling the magnitude of the frictional resistance between the damping bushing and the inner wall of the outer sleeve or the outer wall of the inner sleeve.
[0017] Preferably, the ratchet teeth of the ratchet structure are continuously arranged along the circumferential direction of the damping bushing; or
[0018] The ratchet teeth of the ratchet structure are arranged at intervals along the circumferential direction of the damping bushing.
[0019] Preferably, the inner or outer kit and the damping bushing are provided with a self-locking angle to maintain the first frame and the second frame in an unfolded or folded state. The self-locking angle is the angle between the first frame and the second frame, and the self-locking angle is 20°-160°.
[0020] The first and second frames are locked in the unfolded or folded state by the static friction between the inner or outer components and the damping bushing.
[0021] An elliptical machine with the above-mentioned rotating mechanism includes a frame, which is composed of a first frame and a second frame. The rotating mechanism is provided between the first frame and the second frame, and the rotating mechanism realizes the rotational connection between the first frame and the second frame and the locking of the first frame and the second frame when folded.
[0022] When in use, the user simply lifts the first or second frame and rotates it in the folding direction. When the first or second frame rotates to the predetermined folding self-locking angle, the static friction between the ratchet mechanism and the inner wall of the outer or inner component is sufficient to prevent the outer or inner component from rotating in the unfolding direction. Therefore, the folding and locking of the first and second frames is completed automatically. When the first or second frame needs to be unfolded, the user can press down slightly on the first or second frame, causing it to rotate in the unfolding direction. At this time, the outer component and the ratchet mechanism experience dynamic friction, and the first or second frame will slowly descend to the unfolded state. The user can then use the fitness equipment for exercise.
[0023] This design utilizes the unidirectional function of the ratchet structure in the damping bushing and the elasticity of the material to allow users to easily rotate the elliptical machine in the folding direction. Simultaneously, in the unfolding direction, the static friction generated by the structural features overcomes the downward tendency, automatically locking the first and second frames. Users only need to lift or press the first or second frame to fold, lock, or unfold the elliptical machine, making it extremely convenient.
[0024] Preferably, the elliptical machine is a front-drive elliptical machine. The first frame is provided with a wheel, rocker arm, crank, connecting rod and foot pedal assembly. The second frame includes a slide rail, and the pulley that supports the foot pedal assembly is slidably fitted on the slide rail.
[0025] The damping bushing is fixed to the inner assembly, and the outer wall of the damping bushing is provided with the ratchet structure, so that the entire elliptical machine can be folded by rotating the second frame.
[0026] With the above setup, when the elliptical trainer is folded, the second frame is raised and rotated for folding, which makes it lighter and reduces the space occupied by the entire elliptical trainer along its length.
[0027] Preferably, when the second frame rotates to an angle of 50°–90° with the horizontal plane, this angle is the folding self-locking angle of the elliptical machine. At this time, the static friction between the ratchet structure and the inner wall of the outer kit is sufficient to prevent the outer kit from rotating in the unfolding direction.
[0028] Preferably, the inner sleeve, damping bushing, and outer sleeve are equipped with locking elements, and the inner sleeve, damping bushing, and outer sleeve are provided with locking holes through which the locking elements pass;
[0029] When the second and first frames of the elliptical machine are in a flattened state, the locking holes of the inner sleeve, damping bushing, and outer sleeve are aligned with each other to allow the locking element to pass through.
[0030] By setting locking mechanisms, the stability of the first and second frames in the flattened state can be ensured, thereby guaranteeing the safety of the elliptical machine during use.
[0031] Compared with existing technologies, the beneficial effects of this utility model are as follows: This solution utilizes the unidirectional function of the ratchet structure of the damping bushing and the elasticity of the material to achieve smooth unfolding or folding of the product in one direction, while damping occurs in the other. Furthermore, the damping also enables self-locking during unfolding or folding, thus meeting user needs. Simultaneously, when the rotating mechanism is used on an elliptical machine, the static friction generated by the structural features overcomes the downward tendency in the unfolding rotation direction, allowing the second frame to lock automatically. Users only need to lift or press the second frame to complete the folding or unfolding of the elliptical machine, which is extremely convenient. Attached Figure Description
[0032] Figure 1 A schematic diagram showing the structure of an elliptical machine with a rotating mechanism installed on it, and the machine in use when unfolded.
[0033] Figure 2 This is a schematic diagram of the elliptical machine in its folded state.
[0034] Figure 3 This is a schematic diagram of the rotating mechanism.
[0035] Figure 4 A schematic diagram of the rotating mechanism after removing the fixed connecting sleeve;
[0036] Figure 5 This is a schematic diagram of the rotating mechanism;
[0037] Figure 6 Exploded view of the rotating mechanism;
[0038] Figure 7 A cross-sectional view of the rotating mechanism.
[0039] Reference numerals: 11. First frame; 12. Second frame; 2. Rotating mechanism; 3. Fixed connecting sleeve; 31. Vertical block; 41. Inner component; 411. Flat part; 42. Outer component; 421. First outer component; 422. Second outer component; 423. Threaded sleeve; 43. Damping bushing; 5. Locking element; 6. Connecting plate; 61. Extension; 7. Positioning post; 71. Positioning hole; 8. Locking hole; 100. Wheel; 101. Rocker arm; 102. Foot pedal assembly; 103. Linkage rod; 104. Pulley; 105. Slide rail. Detailed Implementation
[0040] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.
[0041] This embodiment uses an elliptical machine as an example to illustrate the use of a rotating mechanism. However, the rotating mechanism can also be installed on devices such as laptops and fitness equipment that require locking when folded or unfolded.
[0042] like Figure 1 As shown, this embodiment discloses an elliptical machine with a rotating mechanism, which includes a frame consisting of a first frame 11 and a second frame 12. A rotating mechanism 2 is provided between the first frame 11 and the second frame 12. The first frame 11 is the front frame of the elliptical machine, and the second frame 12 is the rear frame of the elliptical machine. The elliptical machine is a front-drive type. The first frame 11 mainly includes a wheel 100, a rocker arm 101, a crank, a connecting rod 103, and a foot pedal assembly 102. These components are interconnected using existing elliptical machine connection methods. A slide rail 105 is provided on the second frame 12. The lower end of the foot pedal assembly 102 is connected to the connecting rod 103, and the end of the connecting rod 103 is provided with a pulley 104. The pulley 104 supports the foot pedal assembly 102 and is slidably fitted onto the slide rail 105.
[0043] like Figures 1 to 7As shown, the rotating mechanism 2 includes an inner component 41 fixed to the first frame 11 and an outer component 42 fixed to the second frame 12. The outer component 42 is coaxially sleeved on the outside of the inner component 41, and the two are rotatably connected to achieve the folding or unfolding of the elliptical machine. The axial length of the inner component 41 is greater than the axial length of the outer component 42, so the two axial ends of the inner component 41 are exposed on the axial outside of the outer component 42. Flat parts 411 are provided at the two axial ends of the inner component 41, so that the two axial ends of the inner component 41 are not completely circular. A fixed connecting sleeve 3 is welded and fixed to the first frame 11. The fixed connecting sleeve 3 has a U-shaped groove. The two axial ends of the inner component 41 are engaged in the U-shaped groove, so that the flat parts 411 abut against the groove wall of the U-shaped groove, thereby preventing the inner component 41 from rotating. The fixed connecting sleeve 3 also has a vertically extending vertical block 31, which also limits the horizontal direction of the inner component 41, thereby completing the fixed connection between the inner component 41 and the first frame 11.
[0044] A damping bushing 43 is provided between the inner sleeve 41 and the outer sleeve 42. The damping bushing 43 is sleeved and fixed on the circumferential outer wall of the inner sleeve 41. A radially concave-convex insertion and engagement structure (not shown in the figure) is provided between the circumferential outer wall of the inner sleeve 41 and the circumferential inner wall of the damping bushing 43. The radially concave-convex insertion and engagement structure can be provided with a radially extending protrusion and a radially open groove. The protrusion and the groove are inserted and engaged to achieve circumferential positioning between the inner sleeve 41 and the damping bushing 43, so that the damping bushing 43 will not rotate circumferentially relative to the inner sleeve 41.
[0045] The damping bushing 43 is made of elastic material and has a ratchet structure on its circumferential outer wall. The tilt direction of the ratchet structure is consistent with the folding rotation direction of the second frame of the elliptical machine and opposite to the unfolding rotation direction. The ratchet teeth of the ratchet structure are continuously arranged along the circumferential direction of the damping bushing, or they can be arranged at intervals.
[0046] When the outer sleeve 42 rotates in the folding rotation direction, the resistance generated between the inner wall of the outer sleeve 42 and the ratchet structure is recorded as the first resistance. When the outer sleeve 42 rotates in the unfolding rotation direction, the resistance generated between the inner wall of the outer sleeve 42 and the ratchet structure is recorded as the second resistance. The second resistance is much greater than the first resistance.
[0047] When the second frame 12 rotates to the predetermined folding self-locking angle, the static friction between the ratchet structure and the inner wall of the outer sleeve 42 is sufficient to prevent the outer sleeve 42 from rotating in the unfolding direction, thereby maintaining the folding and locking state of the second frame 12. The angle between the second frame 12 and the ground is α, and the folding self-locking angle of the second frame 12 is when α is 50°–90°.
[0048] The outer kit 42 includes a separate first outer kit 421 and a second outer kit 422. A positioning post 7 and a positioning hole 71 are provided between the first outer kit 421 and the second outer kit 422 for interlocking positioning. Four threaded sleeves 423 are provided on the outer walls of the first outer kit 421 and the second outer kit 422. A locking element (not shown in the figure) passes through the threaded sleeves 423 to achieve a fixed connection between the first outer kit 421 and the second outer kit 422. The locking element is a conventional bolt. By tightening the locking element, the screw-in depth is changed, adjusting the radial compression of the damping bushing 43 fitted inside by the first outer kit 421 and the second outer kit 422; thereby controlling the magnitude of the frictional resistance between the damping bushing 43 and the inner wall of the outer kit 42.
[0049] The first outer kit 421 is located above the second outer kit 422. The first outer kit 421 has a connecting plate 6 extending horizontally, which is welded and fixed to the second frame 12. The first outer kit 421 also has an extension 61 extending obliquely upward. The first outer kit 421, the damping bushing 43, and the inner kit 41 are all provided with locking holes 8, and the locking holes 8 of the first outer kit 421 pass through the extension 61. The locking holes 8 are fitted with locking elements 5. When the second frame 12 and the first frame 11 are in a flattened state, the locking holes 8 of the inner kit 41, the damping bushing 43, and the outer kit 42 are aligned with each other to allow the locking elements 5 to pass through. The locking holes 8 of the extension 61 have a threaded structure, and the locking element 5 is a bolt, which is threadedly engaged with the locking holes 8 of the extension 61.
[0050] When the elliptical trainer needs to be folded for storage, tighten the locking element 5 to disengage it from the locking holes 8 of the inner component 41 and the damping bushing 43. Then, lift the second frame 12 and rotate it in the folding direction. When the second frame 12 rotates to the predetermined folding self-locking angle of 65°, the static friction between the ratchet structure and the inner wall of the outer component 42 is sufficient to prevent the outer component 42 from rotating in the unfolding direction, thus automatically locking the second frame 12. When the second frame 12 needs to be unfolded, the user can press down slightly, causing it to rotate in the unfolding direction. At this point, dynamic friction occurs between the outer component 42 and the ratchet structure, and the second frame 12 slowly descends to the unfolded state. Then, tighten the locking element 5 again to secure the inner component 41, the damping bushing 43, and the outer component 42. The user can then use the elliptical trainer for exercise.
[0051] In some other embodiments, the inner wall of the damping bushing 43 may be provided with a ratchet structure, and the outer wall of the damping bushing 43 may be fixed together with the outer kit 42. By rotating the first frame 11, the inner kit 41 rotates relative to the damping bushing 43, thereby enabling the first frame 11 and the second frame 12 to unfold or fold. Furthermore, when the rotating mechanism is used on other components, the static friction between the damping bushing 43 and the outer kit 42 or the inner kit 41 enables the first frame 11 or the second frame 12 to have a self-locking angle in the unfolded or folded state. The self-locking angle is the angle between the first frame 11 and the second frame 12, and the self-locking angle is 20°-160°.
Claims
1. A rotating mechanism, characterized in that, include: Internal components, used to secure the first frame; An outer kit is used to fix the second frame. The outer kit is coaxially sleeved on the outside of the inner kit and the two can rotate relative to each other to realize the unfolding or folding of the first frame and the second frame. A damping bushing is disposed between the inner and outer sleeves. The damping bushing is made of an elastic material and has a ratchet structure on its circumferential outer or circumferential inner wall. The ratchet structure causes the inner and outer sleeves to generate different magnitudes of resistance when they rotate relative to each other clockwise and counterclockwise.
2. The rotating mechanism according to claim 1, characterized in that: The damping bushing is sleeved and fixed on the circumferential outer wall of the inner sleeve, and a ratchet structure is disposed on the circumferential outer wall of the damping bushing; when the rotation direction of the outer sleeve relative to the inner sleeve is consistent with the tilt direction of the ratchet structure, the damping bushing undergoes elastic deformation and provides a first resistance; when the rotation direction of the outer sleeve relative to the inner sleeve is opposite to the tilt direction of the ratchet structure, the ratchet structure rubs against the inner wall of the outer sleeve and provides a second resistance greater than the first resistance; or The damping bushing is sleeved and fixed on the circumferential inner wall of the outer sleeve, and the ratchet structure is disposed on the circumferential inner wall of the damping bushing; when the rotation direction of the outer sleeve relative to the inner sleeve is opposite to the tilt direction of the ratchet structure, the damping bushing undergoes elastic deformation and provides a first resistance; when the rotation direction of the outer sleeve relative to the inner sleeve is consistent with the tilt direction of the ratchet structure, the ratchet structure rubs against the inner wall of the outer sleeve and provides a second resistance greater than the first resistance.
3. The rotating mechanism according to claim 2, characterized in that: The inner sleeve is fixed to the damping bushing, and a radially recessed and protruding insertion structure is provided between the circumferential outer wall of the inner sleeve and the damping bushing; or The outer sleeve is fixed to the damping bushing, and a radially concave-convex insertion fit structure is provided between the circumferential inner wall of the outer sleeve and the damping bushing.
4. The rotating mechanism according to claim 1, characterized in that: The outer casing includes a first outer casing and a second outer casing that are separately configured, and the first outer casing and the second outer casing are connected by a locking thread; By screwing the locking member, the screwing depth is changed, and the radial compression of the first and second outer sleeves on the damping bushing fitted inside them is adjusted; thereby controlling the magnitude of the frictional resistance between the damping bushing and the inner wall of the outer sleeve or the outer wall of the inner sleeve.
5. The rotating mechanism according to claim 1, characterized in that: The ratchet teeth of the ratchet structure are continuously arranged along the circumferential direction of the damping bushing; or The ratchet teeth of the ratchet structure are arranged at intervals along the circumferential direction of the damping bushing.
6. The rotating mechanism according to claim 1, characterized in that: The inner or outer kit and the damping bushing are provided with a self-locking angle to maintain the first frame and the second frame in an unfolded or folded state. The self-locking angle is the angle between the first frame and the second frame, and the self-locking angle is 20°-160°.
7. An elliptical machine having the rotating mechanism described in any one of claims 1-6, characterized in that: It includes a frame, which is composed of a first frame and a second frame. The rotating mechanism is provided between the first frame and the second frame, and the rotating mechanism realizes the rotational connection between the first frame and the second frame and the locking of the first frame and the second frame when folded.
8. The elliptical machine according to claim 7, characterized in that: The elliptical machine is a front-drive elliptical machine. The first frame is equipped with a wheel, rocker arm, crank, connecting rod and foot pedal assembly. The second frame includes a slide rail, and the pulley that supports the foot pedal assembly is slidably fitted on the slide rail. The damping bushing is fixed to the inner assembly, and the outer wall of the damping bushing is provided with the ratchet structure, so that the entire elliptical machine can be folded by rotating the second frame.
9. The elliptical machine according to claim 8, characterized in that: When the second frame rotates to an angle of 50°–90° with the horizontal plane, this angle is the folding self-locking angle of the elliptical machine. At this time, the static friction between the ratchet structure and the inner wall of the outer kit is sufficient to prevent the outer kit from rotating in the unfolding direction.
10. The elliptical machine according to claim 7, characterized in that: The inner sleeve, damping bushing, and outer sleeve are equipped with locking elements, and the inner sleeve, damping bushing, and outer sleeve are provided with locking holes through which the locking elements pass; When the second and first frames of the elliptical machine are in a flattened state, the locking holes of the inner sleeve, damping bushing, and outer sleeve are aligned with each other to allow the locking element to pass through.