Rail guide damper

Abstract

The application discloses a guide rail type damping speed reducer, which comprises a mounting shell, a center support is rotationally connected in the mounting shell, the center support comprises a plurality of inclined guide rails, damping sliding blocks are slidably connected to the inclined guide rails, and the inclined guide rails are offset in the reverse direction of the rotation direction of the center support. The guide rail type damping speed reducer is provided, the included angle between the rotation-out direction and the rotation direction of the damping sliding blocks is smaller during the rotation-out process, the friction force borne by the damping sliding blocks during movement is reduced, the smoothness of the rotation-out of the damping sliding blocks is improved, the jamming phenomenon of the damping sliding blocks during the rotation-out or rotation-in is avoided, and the stability of the overall device is improved.

Description

Technical Field

[0001] This invention relates to the field of mechanical transmission technology, and in particular to a guide rail type damping reducer. Background Technology

[0002] With increasing awareness of space organization and changing needs for rope length, cable reels are increasingly used for storing long cables, water pipes, and traction ropes. Cable reels typically have a built-in coil spring that generates significant traction on the rope during winding, causing irregular inertial swings. Therefore, a damping reducer is usually installed to limit this and improve stability during winding. However, commercially available damping reducers generate significant friction between the guide rail and the damping slider, leading to considerable resistance and interference during unwinding. This results in the slider not unwinding smoothly and excessive pressure on the guide rail. Especially in the initial stage of rotation, the slider that cannot unwind smoothly may get stuck on the guide rail. As the speed gradually increases to a certain threshold, it suddenly overcomes the friction and impacts the outer casing, generating a large impact force and affecting the overall balance.

[0003] For example, publication number "CN209108456U" discloses "a centrifugal damping mechanism for an escape device", which includes a lower base plate and an upper base plate arranged symmetrically and at intervals, a reel located in the lower base plate and the upper base plate, and a steel wire rope connected to the reel and capable of driving the reel to rotate. The lower base plate and the upper base plate are connected at the middle by a rotatable central shaft. A transverse centrifugal shaft perpendicular to the central shaft is provided through the middle of the central shaft. Centrifugal blocks are symmetrically inserted at both ends of the centrifugal shaft. A spring is sleeved on the outer wall of the centrifugal shaft. The two ends of the spring abut against the central shaft and the centrifugal blocks, respectively. A reel convex ring protruding inward is provided at the middle of the inner wall of the reel. The inner edge of the reel convex ring is provided with a symmetrical convex ring bevel. A transverse centrifugal block notch is provided at the center of the outer edge of the centrifugal block. The outer edge of the centrifugal block notch is provided with a symmetrical notch groove bevel. The slope of the convex ring bevel and the notch groove bevel are the same and can fit together. However, in practical applications, since the centrifugal shaft is perpendicular to the radius of rotation, the squeezing force is completely perpendicular to the centrifugal shaft during the process of the centrifugal block sliding out, resulting in a large frictional force. The centrifugal block is subjected to a small traction force far from the center of rotation. At the same time, during the deceleration process, the resistance of the centrifugal block acting on the centrifugal shaft is applied perpendicularly to the centrifugal shaft, resulting in a large force on the centrifugal shaft. Summary of the Invention

[0004] In view of the problems mentioned in the background art, such as the large force on the centrifugal shaft, the large friction between the centrifugal block and the centrifugal block, and the uneven rotation of the centrifugal block, the present invention provides a guide rail type damping reducer, which makes the angle between the rotation direction and the rotation direction of the damping slider smaller during the rotation process, reduces the friction force on the damping slider during movement, and thus improves the smoothness of the damping slider rotation.

[0005] The second objective of this invention is to make the rotational speed variation curve of the connected winding device smoother.

[0006] To achieve the above objectives, the present invention adopts the following technical solution.

[0007] A guide rail type damping reducer includes a mounting housing, within which a central support is rotatably connected. The central support includes several inclined guide rails, and a damping slider is slidably connected to each inclined guide rail. The inclined guide rails are offset in the opposite direction to the rotation direction of the central support. Since the inclined direction of the inclined guide rails is opposite to the rotation direction, when the damping reducer rotates with the connected rotating device, the damping slider, due to inertia, can more easily disengage from the inclined guide rails. This avoids the centrifugal motion of the damping slider being affected by friction at low rotational speeds. Simultaneously, in the axial direction of rotation, the height of the inclined guide rails and the height of the damping slider are aligned. When the damping slider abuts against the mounting housing, the resistance between the slider and the mounting housing reacts on the inclined guide rails, allowing for more even force transmission. The central support includes a base and a rotating shaft. The sides of the inclined guide rails are connected to the rotating shaft, while the bottom edges of the inclined guide rails are connected to the base of the support, resulting in higher structural strength for the inclined guide rails.

[0008] The inclined guide rail includes an outer inclined wall and an inner inclined wall, with an elastic cavity between the outer and inner inclined walls. The hollow structure of the elastic cavity between the outer and inner inclined walls gives the inclined guide rail a certain elastic deformation capability. During the contact between the damping slider and the inclined guide rail, a certain deformation occurs, improving its toughness. Especially during the transition from a stationary to a moving position at the central support, it buffers the impact force between the damping slider and the inclined guide rail.

[0009] A positioning post is connected to the end of the elastic cavity furthest from the rotation center. The positioning post within the elastic cavity enhances its structural strength. Therefore, the positioning post is positioned at the end furthest from the rotation center. When the damping slider abuts against the mounting housing, it connects to the end of the inclined guide rail furthest from the rotation center. Simultaneously, the force transmitted within the entire damping reducer is relatively large. By placing the positioning post here, the load-bearing capacity of the inclined guide rail end is improved. The positioning post is connected to the chassis of the central support, thus connecting and fixing both ends and the bottom of the inclined guide rail to the central support, thereby improving the overall strength of the inclined guide rail.

[0010] The inclined guide rail is an arc-shaped guide rail, and the damping slider is provided with an arc-shaped groove. The arc-shaped guide rail and the arc-shaped groove are slidably connected. By setting the arc-shaped guide rail, the relative sliding trajectory between the inclined guide rail and the damping slider is arc-shaped, making the rotation of the damping slider smoother. At the same time, due to the arc-shaped structure of the inclined guide rail, its compressive strength is better, and it has better structural strength.

[0011] The damping block is equipped with a barb, which is movably connected to a spring-loaded component. The spring-loaded component is connected to an adjacent damping slider. The barb on the damping block, with the spring-loaded component connected to it, prevents the spring-loaded component from dislodging during the stretching and recovery process. The spring-loaded component connects to the adjacent damping slider. As the damping slider rotates outward, the distance between adjacent damping sliders increases, stretching the spring-loaded component. After the rotational speed decreases, the spring-loaded component closes the distance between the adjacent damping sliders, causing the damping sliders to retract. Since the movement trajectory of the damping slider is along the inclined direction of the guide rail, a circumferential angular offset will occur between the damping slider and the central support. Therefore, the spring-loaded component is positioned between adjacent damping sliders. When the damping slider offsets from the central support, the offset of the spring-loaded component is synchronized with that of the damping slider, ensuring that the stretching direction of the spring-loaded component remains unchanged, preventing torsional offset and improving its service life.

[0012] A weight-adding block is movably connected to the damping slider. The weight-adding block is detachably connected to the damping slider, allowing the weight of the damping slider to be adjusted according to usage requirements. This alters the inertia of the damping slider itself, changes the upper and lower limits of the resistance generated, and thus expands the applicability of the damping reducer.

[0013] The central support is connected to a limiting plate, and the damping slider is provided with a limiting wall. When the central support is not rotating, the limiting arm abuts against the limiting plate. The damping slider retracts under the action of the spring-loaded component and abuts against the limiting plate. This is the limit contraction state of the damping slider. The damping slider is pulled and contracted by the spring-loaded component, maintaining contact with the limiting plate. This ensures the stability of the damping slider in the non-working state and avoids the influence of the damping reducer's position and gravity on the initial unfolded state.

[0014] The damping slider includes several graded sliders, each of which is stacked along the axial direction and slidably connected to the same inclined guide rail. Graded rebound members are connected between corresponding graded sliders connected to adjacent inclined guide rails. Multiple graded sliders are connected to the same inclined guide rail along the rotation axis. These graded sliders can slide relative to each other. Each graded slider is connected to the graded sliders on adjacent inclined guide rails via graded spring-loaded components. Different graded spring-loaded components have different stiffness coefficients, resulting in different pulling forces on the graded sliders. Therefore, at different rotational speeds, the graded sliders will rotate out in stages. Graded spring-loaded components at the same horizontal position have the same stiffness coefficient, so graded sliders at the same horizontal position rotate out synchronously after reaching a threshold rotational speed, initially reducing rotational acceleration and minimizing the swinging of the pulled rope due to sudden speed changes. As the rotational speed gradually increases, the pressure exerted by the first-layer graded sliders on the mounting housing increases, gradually increasing the resistance and continuously counteracting the rotational force generated by the winding mechanism, ensuring stability during speed increase. When the speed reaches the rotational threshold of the second-layer graded sliders, the second-layer graded sliders rotate out, further increasing the resistance generated by the damping reducer by increasing the pressure and friction area. The stepped rotation effect of the stepped sliders allows the application of resistance in the damping reducer to be segmented. Small resistance is added in the low-speed range to prevent excessive speed increase, while large resistance is added in the medium-to-high-speed range to counteract the tension of the coil spring within the winding mechanism, preventing excessively high speed limits. This allows for adaptive adjustment of resistance according to different speed ranges. Furthermore, the synchronous rotation of the stepped sliders on the same horizontal line ensures the stability of the entire damping reducer. In addition, the stepped sliders have three layers, with the first and third layers having the same spring coefficient, rotating synchronously at the same speed to ensure force balance throughout the damping reducer. Furthermore, the different masses and volumes of each stepped slider result in progressively increasing resistance curves at different stages, preventing excessively high speeds in the winding mechanism. Compared to a single-layer damping reducer, this solution can adaptively provide different resistance levels at different speeds, resulting in a smoother speed increase curve. Especially in the initial working stage of the winding mechanism, it prevents rapid swaying caused by a sudden increase in the speed of the wound rope from rest. This solution achieves the second objective of this invention.

[0015] The inner wall of the mounting housing is provided with layered damping surfaces. Different friction coefficients are arranged along the axial direction of the mounting housing, corresponding to different graded sliders. Since the second and third graded sliders require greater rebound force to overcome when rotating out, the friction coefficients of the damping surfaces corresponding to the second and third graded sliders are set to be higher. This avoids the lower friction caused by the lower squeezing force of the subsequent graded sliders on the mounting housing. Furthermore, the friction coefficient of the damping surface corresponding to the third graded slider is much higher than that of the first and second layers. When the speed exceeds the controllable range, the third graded slider abuts against the corresponding damping surface, generating greater resistance and suppressing the speed within the controllable range. This prevents the user from generating excessive traction force when pulling the rope in the opposite direction, which could damage the inside of the reel due to excessive speed. Simultaneously, the rapid increase in resistance serves as a warning to the user that the rope is being pulled too quickly.

[0016] The beneficial effects of this invention are as follows: (1) By using the inclined guide rail, the friction force on the damping slider during the rotation process is reduced, ensuring the smoothness of the rotation and retraction process, and the pressure resistance is increased by using the arc guide rail. (2) The elastic cavity provides a certain buffering capacity for the inclined guide rail. The positioning column set at the end can improve the compressive strength of the inclined guide rail under the working state of the damping reducer and improve the connection stability between the inclined guide rail and the center support. (3) When the damping slider slides on the inclined guide rail, it generates angular displacement with the central support. The spring is connected by a barb, which can ensure that the angular displacement of the spring and the damping slider are the same, and ensure that the deformation direction of the spring is uniform. (4) The graded slider can adapt to changes in rotational speed and provide different resistance levels to make the overall change in rotational speed more stable. At the same time, it increases the upper and lower limits of the speed that can be limited, making it more applicable. (5) By setting layered damping surfaces to change the coefficient of friction, the layered sliders of the later layers can obtain greater friction to counteract the traction force on the rope more quickly, and remind the user of the speed change and limit the speed during the reverse pull of the rope to protect the user's safety. Attached Figure Description

[0017] Figure 1 This is an isometric view of the present invention.

[0018] Figure 2 This is an isometric sectional view of the present invention.

[0019] Figure 3 This is an isometric view of the springback component in Example 1.

[0020] Figure 4 This is an isometric view of the central support in Example 1.

[0021] Figure 5 This is an assembly diagram of the central support and damping slider in Example 1.

[0022] Figure 6 This is an isometric view of Example 2.

[0023] Figure 7 This is an isometric view of the housing installed in Example 3.

[0024] In the diagram: 1. Mounting housing; 11. Layered damping surface; 2. Center support; 21. Positioning post; 3. Inclined guide rail; 31. Outer inclined wall; 32. Inner inclined wall; 33. Elastic cavity; 301. Arc-shaped guide rail; 401. Arc-shaped groove; 4. Damping slider; 41. Barb; 42. Limiting wall; 5. Springback component; 6. Weighting block; 7. Limiting disc; 8. Graded slider; 9. Graded springback component. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] Example 1: like Figure 1 , 2 As shown in Figure 5, a guide rail type damping reducer includes a mounting housing 1, a central support 2 rotatably connected inside the mounting housing 1, and the central support 2 including three inclined guide rails 3, the inclined guide rails 3 being arc-shaped guide rails 301, the inclined guide rails 3 being slidably connected to a damping slider 4, the damping slider 4 being provided with an arc-shaped sliding groove 401, the arc-shaped guide rails 301 being slidably connected to the arc-shaped sliding grooves 401, and the inclined guide rails 3 being offset in the opposite direction to the rotation direction of the central support 2.

[0027] The inclined direction of the inclined guide rail 3 is opposite to the rotation direction. When the damping reducer rotates with the connected rotating device, the damping slider 4 will more easily disengage from the inclined guide rail 3 due to inertia. This avoids the centrifugal motion of the damping slider 4 being affected by friction when the rotation speed is low. At the same time, the height of the inclined guide rail 3 and the height of the damping slider 4 are in the axial direction of rotation. When the damping slider 4 abuts against the mounting housing 1, the resistance between it and the mounting housing 1 acts on the inclined guide rail 3, and the force on the inclined guide rail 3 can be transmitted more evenly. The central support 2 includes a chassis and a rotating shaft. The side of the inclined guide rail 3 is connected to the rotating shaft, and the bottom edge of the inclined guide rail 3 is connected to the chassis of the support, which makes the structural strength of the inclined guide rail 3 higher. By setting the arc-shaped guide rail 301, the relative sliding trajectory between the inclined guide rail 3 and the damping slider 4 is arc-shaped, making the rotation effect of the damping slider 4 smoother. At the same time, due to the arc-shaped structure of the inclined guide rail 3, its compressive strength is better and it has better structural strength.

[0028] like Figure 4As shown, the inclined guide rail 3 includes an outer inclined wall 31 and an inner inclined wall 32, and an elastic cavity 33 is provided between the outer inclined wall 31 and the inner inclined wall 32; a positioning post 21 is connected to the end of the elastic cavity 33 away from the rotation center.

[0029] The inclined guide rail 3 includes an outer inclined wall 31 and an inner inclined wall 32, with a hollow structure of an elastic cavity 33 between the outer inclined wall 31 and the inner inclined wall 32. This gives the inclined guide rail 3 a certain elastic deformation capability. During the process of the damping slider 4 and the inclined guide rail 3 abutting against each other, a certain deformation can be generated, which improves the toughness. Especially during the transition of the central support 2 from rest to motion, it buffers the impact force between the damping slider 4 and the inclined guide rail 3. The positioning post 21 set in the elastic cavity 33 can strengthen the elastic cavity 33. For structural strength, the positioning post 21 is set at the end away from the rotation center. When the damping slider 4 abuts against the mounting housing 1, the damping slider 4 is connected to the end of the inclined guide rail 3 away from the rotation center. At the same time, the force transmitted in the entire damping reducer is relatively large. By setting the positioning post 21 here, the bearing capacity of the end of the inclined guide rail 3 can be improved. The positioning post 21 is connected to the chassis of the central support 2. In this way, both ends and the bottom of the inclined guide rail 3 are connected and fixed together with the central support 2, which improves the overall strength of the inclined guide rail 3.

[0030] like Figure 3 As shown, the damping block is provided with a barb 41, and the barb 41 is movably connected to a spring 5. The spring 5 is connected to the adjacent damping slider 4. In this embodiment, the spring 5 is a tension spring.

[0031] A barb 41 is provided on the damping block, and a tension spring is connected to the barb 41 to prevent the tension spring from coming off during the stretching and recovery process. The tension spring is connected to the adjacent damping slider 4. During the rotation of the damping slider 4, the distance between the adjacent damping slider 4 increases, thereby stretching the tension spring. After the rotation speed decreases, the tension spring pulls the distance between the adjacent damping slider 4 closer, thereby driving the damping slider 4 to retract. Since the movement trajectory of the damping slider 4 is along the inclined direction of the inclined guide rail 3, there will be a circumferential angular offset between the damping slider 4 and the central support 2. Therefore, the tension spring is set between the adjacent damping slider 4. When the damping slider 4 offsets from the central support 2, the offset of the tension spring and the damping slider 4 are synchronized, ensuring that the stretching direction of the tension spring remains unchanged, avoiding torsional offset of the tension spring, and improving its service life.

[0032] like Figure 1 As shown, a weighting block 6 is movably connected to the damping slider 4. The weighting block 6 is detachably connected to the damping slider 4, and the weight of the damping slider 4 can be adjusted according to usage requirements, thereby changing the inertia of the damping slider 4 itself, changing the upper and lower limits of the resistance generated, and thus improving the applicability of the damping reducer.

[0033] like Figure 1 As shown, the central support 2 is connected to the limiting disk 7, and the damping slider 4 is provided with a limiting wall 42. When the central support 2 is not rotating, the limiting arm abuts against the limiting disk 7. The damping slider 4 retracts under the action of the spring-loaded component 5 and abuts against the limiting disk 7. This is the limit contraction state of the damping slider 4. The damping slider 4 is pulled and contracted by the spring-loaded component 5, maintaining contact with the limiting disk 7. This can ensure the stability of the damping slider 4 in the non-working state and avoid the influence of the setting position of the damping reducer and gravity on the initial unfolded state.

[0034] The assembly and operation process of the guide rail type damping reducer in this embodiment is as follows: In this embodiment, three arc-shaped guide rails 301 are provided on the central support 2. An elastic cavity 33 is provided inside the arc-shaped guide rail 301. A positioning post 21 is connected to the end of the elastic cavity 33 away from the rotation center. The positioning post 21 is fixedly connected to the central support 2. The three damping sliders 4 are respectively engaged and connected to the arc-shaped guide rails 301. The limiting plate 7 is fixed to the positioning post 21 by bolts to limit the upper and lower movement of the damping sliders 4. A barb 41 is provided on both sides of the damping slider 4. The barbs 41 on adjacent damping sliders 4 are connected to a return bar. In this embodiment, the spring 5 is a tension spring. The central support 2 is then rotatably connected to the mounting housing. During operation, the gear on the reel meshes with the gear on the central support 2. After the reel rotates, the central support 2 rotates. Under centrifugal force, the damping slider 4 overcomes the tension of the tension spring and slides relative to the arc-shaped guide rail 301, and abuts against the mounting housing, generating friction. This applies resistance to the reel, reducing or increasing speed. When the speed decreases or the reel stops working, the tension spring drives the damping slider 4 to reset, so that the limiting wall 42 on the damping slider 4 abuts against the limiting plate 7, completing the fixation.

[0035] Example 2: like Figure 5 As shown, unlike Embodiment 1, the damping slider 4 in this embodiment includes two graded sliders 8. The graded sliders 8 are stacked along the axial direction and slidably connected on the same inclined guide rail 3. Graded rebound members 95 are connected between the corresponding graded sliders 8 connected on adjacent inclined guide rails 3.

[0036] Along the rotation axis, two graded sliders 8 are connected to the same inclined guide rail 3. These graded sliders 8 can slide relative to each other. Each graded slider 8 is connected to the graded sliders 8 connected to the adjacent inclined guide rail 3 via graded spring-loaded components 95. Different graded spring-loaded components 95 have different stiffness coefficients, resulting in different pulling forces on the graded sliders 8. Therefore, at different rotational speeds, the graded sliders 8 will rotate out in stages at different speeds. The stiffness coefficients of the graded spring-loaded components 95 at the same horizontal position are the same. Therefore, the graded sliders 8 at the same horizontal position rotate out synchronously after the rotational speed reaches a threshold, initially reducing rotational acceleration and minimizing the swinging of the pulled rope due to sudden speed changes. As the rotational speed gradually increases, the squeezing force of the first-layer graded sliders 8 on the mounting housing 1 increases, gradually increasing the resistance and continuously counteracting the rotational force generated by the winding mechanism, ensuring the speed increases. Stability is ensured by the following mechanism: once the speed reaches the unwinding threshold of the second-layer graded slider 8, the second-layer graded slider 8 unwinds, further increasing the resistance generated by the damping reducer by increasing the squeezing force and friction area. Through the graded unwinding effect of the graded slider 8, the resistance application process of the damping reducer is segmented. Small resistance is added in the low-speed range to prevent the speed from rising too quickly, while large resistance is added in the medium-to-high-speed range to counteract the tension of the coil spring in the winding machine, preventing the speed from reaching the upper speed limit too quickly. The resistance can be adaptively adjusted according to different speed ranges. Furthermore, since the graded sliders 8 on the same horizontal line unwind synchronously, the stability of the entire damping reducer is guaranteed. Compared to a single-layer damping reducer, this solution can provide different resistance suppressions at different speeds, making the speed rise curve smoother. Especially in the initial working stage of the winding machine, it can prevent the rapid swinging caused by the sudden increase in the speed of the wound rope from a standstill.

[0037] Example 3: like Figure 6 As shown, unlike Embodiment 2, this embodiment has a layered damping surface 11 on the inner wall of the mounting housing 1. Different friction coefficients of the layered damping surfaces 11 are provided along the axial direction of the mounting housing 1, corresponding to different graded sliders 8. Since the second-layer graded slider 8 needs to overcome a larger rebound force when it rotates out, the friction coefficient of the damping surface corresponding to the second-layer graded slider 8 is set to be larger. This avoids the situation where the second-layer layered slider has a larger pulling force to overcome due to the rebound member 5, resulting in a smaller squeezing force on the mounting housing 1 and thus insufficient friction.

[0038] In addition to the above embodiments, within the scope disclosed in the claims and specification of this invention, the technical features of this invention can be reselected and combined to form new embodiments. These can be achieved by those skilled in the art without creative effort. Therefore, these embodiments not described in detail in this invention should also be regarded as specific embodiments of this invention and within the protection scope of this invention.

Claims

1. A guide rail type damping reducer, comprising a mounting housing, wherein a central support is rotatably connected within the mounting housing, characterized in that, The central support includes several inclined guide rails, each of which is slidably connected to a damping slider. The inclined guide rails are offset in the opposite direction to the rotation of the central support. The damping slider includes several graded sliders, each of which is stacked along the axial direction and slidably connected to the same inclined guide rail. Graded spring-loaded components are connected between corresponding graded sliders connected to adjacent inclined guide rails. The inclined guide rail includes an outer inclined wall and an inner inclined wall, and an elastic cavity is provided between the outer inclined wall and the inner inclined wall.

2. The guide rail type damping reducer according to claim 1, characterized in that, The end of the elastic cavity furthest from the center of rotation is connected to a positioning post.

3. The guide rail type damping reducer according to claim 1, characterized in that, The inclined guide rail is an arc-shaped guide rail, and the damping slider is provided with an arc-shaped groove. The arc-shaped guide rail and the arc-shaped groove are slidably connected.

4. A guide rail type damping reducer according to claim 1, characterized in that, The damping slider is provided with a barb, and the barb is movably connected to a spring-loaded component, which is connected to an adjacent damping slider.

5. A guide rail type damping reducer according to claim 1, characterized in that, A weight-adding block is movably connected to the damping slider.

6. A guide rail type damping reducer according to any one of claims 1-5, characterized in that, The central support is connected to a limiting disk, and the damping slider is provided with a limiting wall. When the central support is not rotating, the limiting wall abuts against the limiting disk.

7. A guide rail type damping reducer according to claim 1, characterized in that, The inner wall of the mounting housing is provided with a layered damping surface.

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