Universal joint mechanism for optimizing rope transmission

Abstract

The utility model discloses a universal joint mechanism for optimizing rope transmission, which is used for guiding rope transmission and comprises a mounting frame and a retainer rotatably mounted on the mounting frame, and a first rotating roller and a second rotating roller are rotatably mounted on the retainer. The axis, rotating relative to the retainer, of the first rotating roller is parallel to the axis, rotating relative to the retainer, of the second rotating roller; a rope limiting hole is formed between the first rotating roller and the second rotating roller, and a rope penetrates through the rope limiting hole; the axis, rotating relative to the holder, of the first rotating roller and the axis, rotating relative to the mounting frame, of the holder are perpendicular to the axis, rotating relative to the mounting frame, of the holder. According to the universal joint mechanism for optimizing the rope transmission, on one hand, the size is small, on the other hand, rotation of at least two angles can be achieved, the complex movement requirement can be met, and large friction of the rope is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the guide structure technical field of filamentous structure especially relates to a kind of universal joint mechanism of optimization rope transmission. BACKGROUND

[0002] Rope is often guided by fixed pulley in the process of transmission, and the fixed pulley is installed on the rack by bearing.

[0003] In terms of installation position, the fixed pulley is usually designed to be fixed in a specific position to ensure smooth movement of mechanical components in a single direction. Due to its large size and the need for certain installation space, the fixed pulley set is more suitable for use in situations where space requirements are not strict, but its application is limited in small or compact structures. In terms of stress, the bearings of the fixed pulley usually bear radial or axial single-direction load, and only a few special designs (such as angular contact bearings) can support partial composite stress. However, in complex stress situations, the bearings of the fixed pulley are easily subjected to axial force, which exceeds the safe working conditions of the bearings, affecting their service life and performance, especially in high-load applications, which can easily cause accelerated wear. Therefore, the bearings of the fixed pulley are more suitable for working conditions with relatively stable load. In terms of degrees of freedom, the fixed pulley usually only has one rotational degree of freedom, making it difficult to support multi-directional and multi-angle movement, which limits its application in systems that require flexible rotation. Overall, the existing technology of the fixed pulley is suitable for single-direction rotation and simple structure systems, but it has certain limitations in situations where installation position is limited, composite stress, and multi-degree-of-freedom movement is required. SUMMARY

[0004] To solve the technical problems in the background art, the utility model provides a kind of universal joint mechanism of optimization rope transmission.

[0005] The utility model provides a kind of universal joint mechanism of optimization rope transmission, for the guide of rope transmission, including mounting frame and the retaining frame of rotation installation in the mounting frame, the first rotation roller and the second rotation roller are rotationally installed on the retaining frame, the axis of rotation of the first rotation roller relative to the retaining frame is parallel to the axis of rotation of the second rotation roller relative to the retaining frame;Rope restriction hole is formed between the first rotation roller and the second rotation roller, and the rope passes through the rope restriction hole;

[0006] The axis of rotation of the first rotation roller and the second rotation roller relative to the retaining frame is perpendicular to the axis of rotation of the retaining frame relative to the mounting frame.

[0007] In use, the rope is threaded through the rope limiting hole, and then the rollers (including the first roller and the second roller) are rotated relative to the holder and / or the holder is rotated relative to the mounting frame during pulling of the rope, which is small in size and can realize rotation at at least two angles, can meet complex motion requirements, and avoids large friction of the rope.

[0008] Specifically, the first roller is provided with a first annular groove on the outer side, the second roller is provided with a second annular groove on the outer side, and the first annular groove and the second annular groove form the rope limiting hole. Even if the first roller and / or the second roller are rotated due to friction of the rope, the limiting and guiding of the rope can be ensured.

[0009] In some embodiments, preferably, the axis of rotation of the first roller relative to the holder, the axis of rotation of the second roller relative to the holder, and the axis of rotation of the holder relative to the mounting frame are in the same plane.

[0010] As a further optimization of the utility model, the mounting frame is further provided with a rotating mounting portion, and the holder is rotatably mounted on the rotating mounting portion.

[0011] Preferably, any two of the axis of rotation of the holder relative to the rotating mounting portion, the axis of rotation of the first roller relative to the holder, and the axis of rotation of the rotating mounting portion relative to the mounting frame are perpendicular to each other.

[0012] Further, multiple angle rotations during rope guiding are realized, and the stress of the structure and the wear of the rope are reduced.

[0013] As a further optimization of the utility model, the rotating mounting portion and the mounting frame are provided with a first bearing.

[0014] Specifically, the mounting frame is provided with an outer limiting extension along the radial direction of the first bearing, the outer limiting extension is used for supporting one end of the outer ring of the first bearing, and the mounting frame is further provided with a detachable outer compression ring, the outer compression ring and the outer limiting extension are used for limiting the other end of the outer ring of the first bearing.

[0015] Preferably, one side of the rotating mounting portion is provided with an inner limiting extension along the radial direction of the first bearing, the inner limiting extension is used for supporting one end of the inner ring of the first bearing, and the rotating mounting portion is further provided with a detachable inner compression ring, the inner compression ring is used for limiting the other end of the inner ring of the first bearing.

[0016] Preferably, the holder is rotatably provided with a connecting shaft, and the connecting shaft is detachably mounted on the rotating mounting portion.

[0017] Preferably, the holder comprises opposite first and second side plates, the first side plate is rotationally connected with the rotation mounting part, and the second side plate is rotationally connected with the inner rotation, and the first side plate is coincident with the second side plate relative to the rotation axis of the rotation mounting part.

[0018] As a further optimization scheme of the utility model, the rope limiting hole deviates from the rotation axis of the rotation mounting part relative to the mounting frame.

[0019] As a further optimization scheme of the utility model, the outer diameter of the first rotation roller is greater than the outer diameter of the second rotation roller.

[0020] The radial force is shared differently on different rollers, and the second rotation roller mainly bears a larger part of the radial force. Due to the different sizes of the rotation rollers, the rope limiting hole is not located at the center of the mechanism, and the force of the rope will generate a moment on the second rotation roller. Therefore, the design also has certain self-adaptability, when the second rotation roller bears a larger radial force with a certain inclination angle, the mechanism inside the inner race of the large bearing will rotate until the second rotation roller only bears the radial force, reaching the balance state of force and moment, which not only avoids the friction and wear of the rope due to the change of angle, but also disperses the load on two high-load-capacity bearings, greatly improving the service life and stability.

[0021] In the utility model, the universal joint mechanism for optimizing the rope transmission has the following advantages relative to the prior art:

[0022] The structure is compact, can realize larger angle transmission in smaller space, and is particularly suitable for mechanical systems with limited space. This has obvious advantages in environments that require flexibility and limited space. Compared with the traditional fixed pulley for guiding the rope, the universal joint mechanism is usually smaller in size, can realize lightweight design, and is suitable for application in some high-demand portable devices or precision machinery.

[0023] At least two angles of rotation can be realized, and complex motion requirements can be flexibly responded. Preferably, it can realize angle change in three-dimensional direction within a certain range, avoid large friction of the rope, and have less influence on transmission efficiency. This multi-degree-of-freedom characteristic is very suitable for systems requiring variable angles and directions, so that the adaptability and flexibility are significantly higher than that of the single-degree-of-freedom fixed pulley.

[0024] The axial and radial forces can be effectively dispersed to avoid the bearing receiving axial force, prolonging the service life. It can bear a certain torque and complex stress, and is not prone to uneven wear and tear. The universal joint mechanism can adapt to large angle deviation, reduce stress fluctuation in transmission, and improve system stability.

[0025] Additional aspects and advantages of the present application will be set forth in part in the following description, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic view of the present application;

[0027] Figure 2 is a top view of the present application;

[0028] Figure 3 is an A-A sectional view of the present application;

[0029] In the figure: 1, mounting frame; 10, outer limit extension; 2, retainer; 20, third side plate; 21, fourth side plate; 22, first side plate; 23, second side plate; 3, first rotating roller; 30, first annular groove; 4, second rotating roller; 40, second annular groove; 5, rope limiting hole; 6, rotating mounting portion; 60, inner limit extension; 7, first bearing; 8, outer pressure ring; 9, inner pressure ring; 11, connecting shaft. DETAILED DESCRIPTION

[0030] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar symbols represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as a limitation of the present application.

[0031] As Figures 1-2 shown in the figure is a kind of optimization rope transmission's universal joint mechanism, a kind of optimization rope transmission's universal joint mechanism, for the guidance of rope transmission, including mounting frame 1 and rotatingly mounted on mounting frame 1 retainer 2, retainer 2 is rotatably mounted with first rotating roller 3 and second rotating roller 4, the axis of rotation of first rotating roller 3 relative to retainer 2 and the axis of rotation of second rotating roller 4 relative to retainer 2 are parallel;Specifically, retainer 2 includes third side plate 20 and fourth side plate 21 which are oppositely and parallelly arranged, one end of first rotating roller 3 and second rotating roller 4 is rotatably mounted on third side plate 20 by bearing, the other end of first rotating roller 3 and second rotating roller 4 is rotatably mounted on fourth side plate 21 by bearing, first rotating roller 3 and second rotating roller 4 are located between third side plate 20 and fourth side plate 21;

[0032] Rope limiting hole 5 is formed between first rotating roller 3 and second rotating roller 4, and rope passes through rope limiting hole 5;

[0033] Specifically, the first rotating roller 3 has a first annular groove 30 on the outer side, the second rotating roller 4 has a second annular groove 40 on the outer side, and the first annular groove and the second annular groove 40 are opposite and form a rope limiting hole 5. Even if the first rotating roller 3 and / or the second rotating roller 4 are driven to rotate due to the friction of the rope, the limiting and guiding of the rope can be ensured.

[0034] The axis of rotation of the first rotating roller 3 and the second rotating roller 4 relative to the holder 2 is perpendicular to the axis of rotation of the holder 2 relative to the mounting frame 1.

[0035] In some embodiments, preferably, the axis of rotation of the first rotating roller 3 relative to the holder 2, the axis of rotation of the second rotating roller 4 relative to the holder 2, and the axis of rotation of the holder 2 relative to the mounting frame 1 are in the same plane, further improving the overall stability.

[0036] In use, the rope is threaded through the rope limiting hole 5, and then the rotating rollers (including the first rotating roller 3 and the second rotating roller 4) rotate relative to the holder 2 and / or the holder 2 rotates relative to the mounting frame 1 during the pulling of the rope. On the one hand, the volume is small, and on the other hand, at least two angles of rotation can be achieved, which can meet the complex motion requirements and avoid large friction of the rope.

[0037] In some embodiments, preferably, a rotating mounting portion 6 is further included, the rotating mounting portion 6 is rotatably mounted on the mounting frame 1, specifically, the mounting frame 1 has a through hole, the rotating mounting portion 6 is rotatably mounted on the mounting frame 1 through a first bearing 7, the outer ring of the first bearing 7 is in contact with the inner wall of the through hole, the rotating mounting portion 6 is annular and in contact with the inner ring of the bearing, and the holder 2 is rotatably mounted on the rotating mounting portion 6. Preferably, any two of the axis of rotation of the holder 2 relative to the rotating mounting portion 6, the axis of rotation of the first rotating roller 3 relative to the holder 2, and the axis of rotation of the rotating mounting portion 6 relative to the mounting frame 1 are perpendicular to each other.

[0038] A larger angle transmission can be achieved in a smaller space, which is particularly suitable for mechanical systems with limited space. This has obvious advantages in environments that require flexibility and limited space. Compared with traditional fixed pulley guiding, the universal joint mechanism is generally smaller in size and can achieve lightweight design, which is suitable for application in some high-demand portable devices or precision machinery.

[0039] At least three angles of rotation can be achieved, which can flexibly meet the complex motion requirements. Preferably, it can achieve angle changes in three-dimensional directions within a certain range, avoiding a large amount of friction while having a small impact on transmission efficiency. This multi-degree-of-freedom characteristic is very suitable for systems that require variable angles and directions, making its adaptability and flexibility significantly higher than that of a single-degree-of-freedom fixed pulley.

[0040] The design of the universal joint mechanism can effectively disperse axial and radial forces in the case of large angles or frequent angle changes, avoid axial force on the bearing, and prolong the service life. It can withstand certain torque and complex stress, and is not prone to uneven wear problems. The universal joint mechanism can adapt to large angle deviation, reduce stress fluctuation in transmission, and improve system stability.

[0041] In some embodiments, preferably, the mounting frame 1 is provided with an outer limiting extension 10 radially along the first bearing 7. When the first bearing 7 is installed by pushing the first bearing 7 onto the mounting frame 1 by external force, the outer limiting extension 10 is used to support one end of the outer ring of the first bearing 7. The mounting frame 1 is also detachably mounted with an outer pressing ring 8, which is opposite to the outer limiting extension 10 and is used to limit the other end of the outer ring of the first bearing 7. Specifically, a side ring groove is opened on the mounting frame 1, and the upper pressing ring is detachably installed in the side ring groove by screws.

[0042] In some embodiments, preferably, one side of the rotating mounting part 6 has an inner limiting extension 60 radially along the first bearing 7, which supports one end of the inner ring of the first bearing 7. The rotating mounting part 6 is detachably mounted with an inner pressing ring 9, which is used to limit the other end of the inner ring of the first bearing 7.

[0043] First, the first rotating roller 3 and the second rotating roller 4 are installed on the retainer 2, then the retainer 2 is installed on the rotating mounting part 6, then the rotating mounting part 6 is pushed onto the inner ring of the first bearing 7 under the action of external force, and the inner limiting extension 60 is used to support and limit the inner ring of the first bearing 7 to avoid the annular rotating mounting part 6 from being separated from the first bearing 7, then the inner pressing ring 9 is fixed on the rotating mounting part 6 by screws to limit the inner ring of the bearing.

[0044] Specifically, the retainer 2 is rotatably mounted with a connecting shaft 11, which is detachably installed on the rotating mounting part 6.

[0045] Preferably, the retainer 2 includes opposite first and second side plates 22 and 23. The first side plate 22 is arranged on one side of the third and fourth side plates 20 and 21 and is fixed on the third and fourth side plates 20 and 21. The second side plate 23 is arranged on the other side of the third and fourth side plates 20 and 21 and is fixed on the third and fourth side plates 20 and 21. The first side plate 22 is rotatably connected with the rotating mounting part 6, and the second side plate 23 is rotatably connected with the rotating mounting part 6. The axis of rotation of the first side plate 22 relative to the rotating mounting part 6 coincides with the axis of rotation of the second side plate 23 relative to the rotating mounting part 6. The rotating mounting part 6 is annular, and the retainer 2 is located in the middle of the rotating mounting part 6 and is rotatably connected with the side of the rotating mounting part 6, so that the retainer 2 also achieves the supporting effect on the rotating mounting part 6.

[0046] In some embodiments, the first side plate 22 has a bearing seat, the second side plate 23 has a bearing seat, and the connecting shaft 11 is provided with two connecting shafts, one of which is rotatably connected with the bearing seat of the first side plate 22, and the other is connected with the bearing seat of the second side plate 23.

[0047] The rotating mounting portion 6 is connected with the connecting shaft 11 through screws, the rotating mounting portion is annular and has a connecting hole in the side surface, when the retainer 2 is placed in the rotating mounting portion 6, the two connecting shafts 11 are opposite to the connecting hole of the rotating mounting portion 6, and the screws are inserted into the connecting hole to realize the connection and fixation of the rotating mounting portion 6 and the connecting shaft 11.

[0048] As a further optimization scheme of the utility model, the rope limiting hole deviates from the axis of the rotating mounting portion 6 relative to the rotating mounting bracket 1. And the outer diameter of the first rotating roller 3 is larger than that of the second rotating roller 4.

[0049] The radial force is shared differently on different rollers, and the second rotating roller 4 mainly bears a large part of the radial force. Due to the different sizes of the first rotating roller 3 and the second rotating roller 4, the rope limiting hole is not located at the center of the mechanism, and the force moment of the rope will act on the second rotating roller 4. Therefore, the design also has certain self-adaptability, when the second rotating roller 4 bears a large radial force with a certain inclination angle, the mechanism inside the inner race (i.e. the inner ring) of the large bearing will rotate until the second rotating roller 4 only bears the radial force, reaching a balanced state of force and moment, which not only avoids the friction and wear caused by the change of the angle of the rope, but also disperses the load on two high-load-capacity bearings, greatly improving the service life and stability.

[0050] The design of the universal joint mechanism enables high transmission efficiency even in the case of large angles or frequent angle changes. Its structure avoids a large amount of unnecessary friction during operation and can tolerate larger angle changes without significantly reducing transmission efficiency. In mechanical systems that require high frequency and multiple angle changes, the universal joint bearing has high reliability and stability.

[0051] It should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0052] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0053] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] In the present application, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0055] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any skilled in the art within the technical scope disclosed by the present application, according to the technical scheme and the application concept of the present application, can be replaced or changed, which should be covered within the protection scope of the present application.

Claims

1. A cardan mechanism for the optimization of the rope transmission, for the guidance of the rope transmission, characterized by, The mounting frame (1) and the retaining frame (2) are rotatably mounted on the mounting frame (1), the first rotating roller (3) and the second rotating roller (4) are rotatably mounted on the retaining frame (2), the axis of rotation of the first rotating roller (3) is parallel to the axis of rotation of the second rotating roller (4), and the rope limiting hole (5) is formed between the first rotating roller (3) and the second rotating roller (4). The axis of rotation of the first rotating roller (3) and the axis of rotation of the second rotating roller (4) are perpendicular to the axis of rotation of the retaining frame (2) relative to the mounting frame (1).

2. The optimized rope-driven gimbal mechanism of claim 1, wherein, The first rotating roller (3) has a first annular groove (30) on the outer side, and the second rotating roller (4) has a second annular groove (40) on the outer side, and the first annular groove and the second annular groove (40) form the rope limiting hole (5).

3. The optimized rope-driven gimbal mechanism of claim 1, wherein, The axis of rotation of the first rotating roller (3) and the axis of rotation of the second rotating roller (4) are in the same plane as the axis of rotation of the retaining frame (2) relative to the mounting frame (1).

4. The optimized rope-driven gimbal mechanism of claim 1, wherein, The mounting frame (1) further rotatably mounts a rotating mounting portion (6), and the retaining frame (2) is rotatably mounted on the rotating mounting portion (6).

5. The optimized rope-driven gimbal mechanism of claim 4, wherein, Any two of the axis of rotation of the retaining frame (2) relative to the rotating mounting portion (6), the axis of rotation of the first rotating roller (3) relative to the retaining frame (2), and the axis of rotation of the rotating mounting portion (6) relative to the mounting frame (1) are perpendicular to each other.

6. The optimized rope-driven gimbal mechanism of claim 4, wherein, The retaining frame (2) rotatably mounts a connecting shaft (11) thereon, and the connecting shaft (11) is detachably mounted on the rotating mounting portion (6).

7. The optimized rope-driven gimbal mechanism of claim 6, wherein, The retaining frame (2) includes opposite first and second side plates (22) and (23), the first side plate (22) is rotatably connected with the rotating mounting portion (6), the second side plate (23) is rotatably connected with the inner rotating portion, and the axis of rotation of the first side plate (22) relative to the rotating mounting portion (6) coincides with the axis of rotation of the second side plate (23) relative to the rotating mounting portion (6).

8. The optimized rope-driven gimbal mechanism of claim 4, wherein, The rotating mounting portion (6) and the mounting frame (1) are provided with a first bearing (7).

9. The optimized rope-driven gimbal mechanism according to any one of claims 4-8, characterized in that, The rope limiting hole deviates from the axis of rotation of the rotating mounting portion (6) relative to the mounting frame (1).

10. The optimized rope-driven gimbal mechanism of claim 9, wherein, The outer diameter of the first rotating roller (3) is greater than the outer diameter of the second rotating roller (4).

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