Axial damping rotation device

Abstract

The application discloses an axial damping rotating device, which comprises a shell, a damper, a hollow lifting driving part, a thimble, a lifting movable part and a return spring. The shell is connected with a door body and is provided with a rotating assembly at a lower end; the damper is fixed to an upper end inside the shell; the lifting driving part is located below the damper; the thimble penetrates through the lifting driving part and corresponds to a shaft end of the damper; the lifting movable part is located below the lifting driving part, is in sliding cooperation with the rotating assembly, is connected with the thimble at an upper end and is in cooperation with a lower end of the lifting driving part at an edge. When the door body is rotated, the lifting driving part drives the lifting movable part and the thimble to move axially, so that the thimble is away from the damper; the return spring is compressed when the movable part moves, and after external force is stopped, the thimble is pushed to return and is in contact with the shaft end of the damper, so that deceleration is realized. The device adopts axial transmission, has compact structure, small radial volume, can be directly installed axially, reduces the requirement for reserved precision, is simple in assembly, low in cost, smooth in damping, long in service life and the like.

Description

Technical Field

[0001] This utility model belongs to the field of door damping control technology, and in particular relates to an axial damping rotation device. Background Technology

[0002] Currently, common door dampers generally suffer from the following drawbacks: First, they mostly employ a transverse installation structure, typically requiring pre-embedding in the ground, ceiling, or inside the door body. This necessitates high precision in the dimensions and position of the reserved space, increasing assembly complexity and construction costs. Second, their overall structure is relatively large, primarily to accommodate transversely arranged hydraulic cylinders or mechanical transmission mechanisms and ensure their structural strength under leverage, resulting in significant radial space occupation. Furthermore, the manufacturing cost is high due to the complex internal hydraulic circuit design, stringent machining precision requirements, and the need for complex irregular structures and additional reinforcing components for pre-embedded installation, further increasing material and processing costs. These issues collectively limit the widespread application and user experience of this type of damper. Utility Model Content

[0003] (I) Purpose of the utility model

[0004] To overcome the above shortcomings, the purpose of this utility model is to provide an axial damping rotation device to solve the technical problem that the traditional horizontally installed door damper has a complex structure, large size and high requirements for installation space precision, resulting in high manufacturing cost and assembly difficulty.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the technical solution provided in this application is as follows:

[0007] An axial damping rotation device includes: a housing connected to a door on its side and a rotating assembly at its lower end; a damper disposed inside the upper part of the housing and fixedly connected to the inner wall of the housing; a hollow lifting drive component disposed inside the housing and located below the damper; a pin inserted through the central structure of the lifting drive component and corresponding to the shaft end of the damper; and a movable lifting component movably disposed inside the housing and located below the lifting drive component, slidingly engaging with the rotating assembly and fixedly connected to the pin at its upper center, with the shape of the upper edge matching the shape of the lower edge of the lifting drive component. When a rotational force is applied to the door body to drive the outer shell and the lifting drive component to rotate synchronously, the lifting movable component, driven by the lower edge of the lifting drive component, can drive the ejector pin to move axially in the first direction away from the damper shaft end; the return spring, which is located inside the outer shell and below the lifting movable component, has its two ends abutting against the lower end of the lifting movable component and the rotating component, respectively. It is compressed when the lifting movable component moves in the first direction, and after the external force stops, it pushes the lifting movable component and the ejector pin to move axially in the second direction closer to the damper shaft end. When the ejector pin abuts against the damper shaft end, it reduces the rotation speed of the outer shell and the door body.

[0008] This solution replaces the traditional transverse lever structure with an axial transmission mechanism. The lifting drive component drives the lifting movable component and the ejector pin to move axially through the edge of the lifting drive component, which greatly optimizes space utilization, makes the overall structure more compact, and significantly reduces the radial volume. During installation, it can be directly inserted axially into the ground without complex pre-embedding in the ground, which significantly reduces the requirements for the dimensional accuracy of the reserved space, simplifies the assembly process, and saves construction costs. In addition, the structure of each component of this device is regular and can use standard parts (such as return springs), which reduces the need for complex irregular components and high-precision machined parts, which is conducive to large-scale production and thus reduces manufacturing costs. In addition, this device also brings beneficial technical effects such as stable and reliable damping effect, high functional integration, and long service life.

[0009] In some embodiments, the lower end of the lifting drive member forms a continuously undulating drive edge, and the upper end of the lifting movable member forms a continuously undulating mating edge that engages with the drive edge.

[0010] This embodiment ensures the continuity and smoothness of power transmission between the lifting drive component and the lifting movable component by setting continuously undulating and oppositely oriented driving and mating sides. This effectively reduces the impact and noise during the movement process, making the axial movement of the ejector pin smoother and more controllable, thereby improving the stability of the damping process and the overall operating quality of the device.

[0011] In some embodiments, the driving edge includes two symmetrical and downwardly protruding arc-shaped driving portions, and a first arc-shaped recess is formed between two adjacent arc-shaped driving portions; the mating edge includes two symmetrical and upwardly protruding arc-shaped mating portions, the shape of which is adapted to the first arc-shaped recess, the edge of the arc-shaped mating portion slides with the edge of the arc-shaped driving portion, and a second recess adapted to the shape of the arc-shaped driving portion is formed between two adjacent arc-shaped mating portions.

[0012] The symmetrical arc-shaped drive and mating parts design allows the lifting drive to drive the lifting moving parts axially in both forward and reverse rotation directions equally. Therefore, regardless of whether the door opens inward or outward, the axial damping rotation device can be triggered and provide a consistent and smooth buffering effect, realizing the versatility of the door opening and closing in both directions and greatly expanding the application scenarios of the product.

[0013] In some embodiments, each arc-shaped drive portion includes two first arc-shaped edges and a first retaining point located therebetween; each arc-shaped mating portion includes two second arc-shaped edges for compression mating and a second retaining point located therebetween.

[0014] This structure, through the sliding compression of the curved edge and the cooperation of the holding point, not only achieves the efficient conversion of rotational motion to axial motion, but also provides a stable holding function for the door at the maximum opening position, enhancing the convenience and safety of use, while maintaining the smoothness and low noise of the movement process.

[0015] In some embodiments, the rotating assembly includes a fixed shaft and a bushing. The lower end of the fixed shaft is fixed to the outside, and the upper end extends into the housing and passes through the return spring. Its lower end extends radially to form a horizontal abutment surface for abutting the end of the spring. The bushing is sleeved on the fixed shaft and has an interference fit with the lower end of the housing.

[0016] This embodiment provides a stable installation foundation for the entire device through the cooperation of the fixed shaft and the bushing.

[0017] In some embodiments, the inner sidewall of the lifting movable component is provided with a plurality of guide sliders spaced apart, and the outer peripheral wall of the fixed shaft is provided with a plurality of axially extending guide rails, each guide slider being embedded in the corresponding guide rail and being able to slide axially.

[0018] The cooperation between the guide slider and the guide rail significantly improves the guiding accuracy and operational stability of the moving parts, avoids wear, abnormal noise or functional failure caused by unexpected movement, and ensures the accuracy of the alignment between the ejector pin and the damper shaft end and the reliability of the entire device's operation.

[0019] In some embodiments, it further includes: an adjustment member movably disposed on the upper end of the housing and connected to the damper, for adjusting the stroke of the damper relative to the pin to change the damping magnitude.

[0020] The introduction of the adjustment component allows users to easily adjust the effective stroke or initial state of the damper according to actual application needs (such as the weight of the door, frequency of use, and desired closing speed), thereby changing the magnitude of the damping force. This achieves flexible and adjustable damping effect, greatly expanding the applicability of the device and its adaptability to different usage scenarios, and enhancing the user experience and market competitiveness of the product.

[0021] In some embodiments, the device further includes a first fastener for securing the lifting drive to the housing.

[0022] The lifting drive component is reliably fixed inside the outer casing by the first fixing component, which ensures that when the door rotates and drives the outer casing, the lifting drive component can rotate synchronously with it without relative movement. This provides the necessary premise for driving the lifting movable component through its lower edge, ensuring the reliability and integrity of the power transmission path, and also contributing to the stability and assembly accuracy of the entire internal structure of the device. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the axial damping rotation device of this utility model;

[0024] Figure 2 This is an exploded view of the axial damping rotation device of this utility model;

[0025] Figure 3 This is a cross-sectional view of the axial damping rotation device of this utility model;

[0026] Figure 4 This is a diagram showing the state of the axial damping rotation device of this utility model when the damper shaft end is separated from the ejector pin.

[0027] Figure 5 This is a diagram showing the state of the axial damping rotation device of this utility model when the damper shaft end is in contact with the ejector pin.

[0028] Figure 6 This is a schematic diagram of the lifting drive component in the axial damping rotation device of this utility model;

[0029] Figure 7 This is a schematic diagram of the lifting movable component in the axial damping rotation device of this utility model;

[0030] Figure 8 This is a schematic diagram of the ejector pin in the axial damping rotation device of this utility model;

[0031] Figure 9 This is a schematic diagram of the lifting drive component and the ejector pin after assembly in the axial damping rotation device of this utility model from a first-view perspective.

[0032] Figure 10This is a second-view structural schematic diagram of the lifting drive component and the ejector pin after assembly in the axial damping rotation device of this utility model.

[0033] Figure 11 This is a schematic diagram of the structure of the axial damping rotation device of this utility model after the lifting drive component, the ejector pin, and the lifting movable component are assembled.

[0034] Figure 12 This is a diagram showing the state of the lifting drive component and the first and second holding points of the lifting movable component in the axial damping rotation device of this utility model when they are in contact.

[0035] Figure label:

[0036] 1. Housing; 2. Rotating assembly; 21. Fixed shaft; 211. Guide rail; 212. Horizontal contact surface; 22. Bushing; 3. Damper; 301. Shaft end; 4. Lifting drive component; 41. Arc-shaped drive part; 411. First arc-shaped edge; 42. First arc-shaped recess; 5. Ejector pin; 6. Lifting movable component; 61. Arc-shaped mating part; 611. Second arc-shaped edge; 62. Second recess; 63. Guide slider; 7. Return spring; 8. Adjusting component; 9. First fixing component; 10. End cap; 11. Second fixing component; 12. Third fixing component. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0038] The present invention provides an axial damping rotation device, the core structure of which includes: a shell 1, a rotating component 2, a damper 3 (optional hydraulic damper), a lifting drive component 4, a pin 5, a lifting movable component 6, and a return spring 7. Specifically, the side of the outer shell 1 is connected to the door body, and a rotating component 2 is mounted on its lower end; the damper 3 is arranged inside the upper end of the outer shell 1, and its upper end is connected to the inner wall of the outer shell 1 by screws; the hollow lifting drive component 4 is installed inside the outer shell 1 through the first fixing component 9 and is located below the damper 3; the ejector pin 5 passes through the hollow structure of the lifting drive component 4 and corresponds to the shaft end 301 of the damper 3; the lifting movable component 6 is axially movable inside the outer shell 1 and is located below the lifting drive component 4. The upper middle part of the lifting movable component 6 is connected to the ejector pin 5 through the second fixing component 11, and the shape of the upper edge complements the shape of the lower edge of the lifting drive component 4; the return spring 7 is installed inside the outer shell 1 and is located below the lifting movable component 6, and its two ends abut against the lower end of the lifting movable component 6 and the rotating component 2, respectively.

[0039] When the user applies rotational force to the door, the door drives the outer casing 1 and the connected lifting drive component 4 to rotate synchronously. At this time, the lifting drive component 4 drives the lifting movable component 6 to move axially downward through its lower edge, compressing the return spring 7. Simultaneously, the ejector pin 5 moves away from the damper 3 shaft end 301 (first direction) as the lifting movable component 6 moves downward, allowing the door to rotate freely. When the external force is removed, the return spring 7 releases its elastic potential energy, pushing the lifting movable component 6 and the ejector pin 5 upward to reset (second direction). During this process, the upper edge of the lifting movable component 6 pushes the lifting drive component 4 in the opposite direction, thereby achieving the closing action of the door. In particular, when the ejector pin 5 rises to contact the damper 3 shaft end 301 and applies pressure, it can significantly slow down the closing speed of the door, achieving smooth damped closing.

[0040] Furthermore, the lower end of the lifting drive component 4 is configured as a continuously undulating drive edge, and correspondingly, the upper end of the lifting movable component 6 is also provided with a continuously undulating mating edge that engages with the drive edge. The structure of the drive edge and the mating edge is typically made of sheet metal through stamping, preferably high-carbon steel to improve wear resistance, but engineering plastics can also be used to reduce noise. During operation, as the lifting drive component 4 rotates with the door, its drive edge and the mating edge on the lifting movable component 6 continuously engage and disengage, thereby converting rotational motion into smooth axial displacement. Specifically, the drive edge presses against the raised portion of the mating edge during rotation, pushing the lifting movable component 6 to move axially, thus moving the ejector pin 5 away from the damper 3 shaft end 301.

[0041] Furthermore, the driving edge can be specifically designed as two symmetrical, downwardly protruding arc-shaped driving portions 41, with a first arc-shaped recess 42 formed between each pair of arc-shaped driving portions 41. Correspondingly, the mating edge includes two symmetrical, upwardly protruding arc-shaped mating portions 61, the shape of which matches the first arc-shaped recess 42, and the edges of the arc-shaped mating portions 61 maintain sliding contact with the edges of the arc-shaped driving portions 41. A second recess 62 matching the shape of the arc-shaped driving portions 41 is formed between each pair of arc-shaped mating portions 61. In the initial state (door closed), the arc-shaped driving portions 41 are fitted into the second recess 62, and the arc-shaped mating portions 61 are fitted into the first arc-shaped recess 42, forming a stable nesting relationship. When the door rotates, causing the lifting drive component 4 to rotate, the arc-shaped driving portions 41 gradually rotate out of the second recess 62 and slide along the edges of the arc-shaped mating portions 61. Since both the arc-shaped drive part 41 and the arc-shaped mating part 61 are protruding structures, they are squeezed during relative movement, pushing the lifting movable part 6 to move downward along the axial direction, so that the pin 5 moves away from the shaft end 301 of the damper 3. It is worth noting that this symmetrical structure allows the lifting drive part 4 to drive the lifting movable part 6 to move axially in a consistent manner through the sliding engagement of the arc-shaped drive part 41 and the arc-shaped mating part 61, regardless of whether the door opens inward or outward. This ensures that the damping function is reliably triggered under both-way door opening conditions, significantly enhancing the product's applicability and installation flexibility.

[0042] More specifically, the details of the arc-shaped drive part 41 and the arc-shaped mating part 61 are described below:

[0043] Each arc-shaped drive part 41 includes two smoothly transitioning first arc-shaped edges 411 and a first holding point (A) located therebetween; similarly, each arc-shaped mating part 61 also includes two second arc-shaped edges 611 and a second holding point (B) located therebetween. Preferably, the first holding point (A) and the second holding point (B) adopt a rounded transition structure to reduce stress concentration and improve service life. During the rotation of the door, the first arc-shaped edges 411 and the second arc-shaped edges 611 continuously slide and press relative to each other, converting the rotational motion into the axial displacement of the lifting moving part 6. When the door rotates to the maximum opening degree (e.g., 90°), the first holding point (A) and the second holding point (B) are exactly aligned and abut against each other, and the door can be stably maintained in the open state without the action of external force. When closing the door, the user applies an initial rotational force to the door, causing the lifting drive component 4 to rotate slightly, and the first holding point (A) and the second holding point (B) to no longer be in contact with each other. Subsequently, under the restoring force of the return spring 7, the lifting movable component 6 moves upward, and its second arc-shaped edge 611 pushes against the first arc-shaped edge 411, causing the lifting drive component 4 and the outer casing 1 to rotate in the opposite direction, thus realizing the closing action. During this process, the ejector pin 5 rises with the lifting movable component 6 and eventually contacts the shaft end 301 of the damper 3, generating a damping effect and achieving a smooth and slow closing of the door.

[0044] Furthermore, the rotating assembly 2 includes a fixed shaft 21 and a bushing 22. The lower end of the fixed shaft 21 is fixed to the ground or door frame foundation by bolts, and the upper end extends into the housing 1 and passes through the return spring 7. Its lower end is provided with a radially extended horizontal abutment surface 212 for supporting the lower end of the return spring 7. The bushing 22 is sleeved on the fixed shaft 21 and rotates with the fixed shaft 21. The lower end of the housing 1 is an end cap 10. The two are connected by a third fastener 12. Specifically, the end cap 10 can be installed on the bushing 22 by interference fit, which not only provides stable support but also facilitates overall disassembly and maintenance.

[0045] Preferably, the inner wall of the lifting movable component 6 may be provided with multiple guide sliders 63 at intervals, while the outer peripheral wall of the fixed shaft 21 is provided with multiple axially extending guide rails 211. Each guide slider 63 is embedded in the corresponding guide rail 211, restricting the lifting movable component 6 to move only along the axial direction, and preventing circumferential rotation or radial offset. This significantly improves the motion guidance accuracy and overall reliability.

[0046] In addition, an adjusting element 8 may be included, mounted on the upper end of the housing 1. This adjusting element 8 may be a screw, threaded into the housing 1, and its end connected to the damper 3. By rotating the adjusting element 8, the user can change the initial distance or effective stroke between the damper 3 shaft end 301 and the ejector pin 5, thereby flexibly adjusting the damping force to meet the needs of different door weights and usage frequencies. Specifically, the deeper the ejector pin 5 retracts the damper 3 shaft end 301 into its body, the greater the force between them, and the more obvious the damping effect.

[0047] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. An axially damped rotation device, characterized in that, include: The outer shell (1) is connected to the door body on its side and has a rotating component (2) at its lower end; a damper (3) is located inside the upper part of the outer shell (1) and is fixedly connected to the inner wall of the outer shell; a hollow lifting drive component (4) is located inside the outer shell (1) and below the damper (3); a pin (5) is inserted into the hollow structure of the lifting drive component (4) and is correspondingly located at the shaft end (301) of the damper (3); a lifting movable component (6) is movably located inside the outer shell (1) and below the lifting drive component (4), which slides with the rotating component (2) and is fixedly connected to the pin (5) at the middle of its upper end, and the shape of the upper edge matches the shape of the lower edge of the lifting drive component (4). When a rotational force is applied to the door body, the outer shell (1) and the lifting component (4) are driven to move. When the lowering drive member (4) rotates synchronously, the lifting movable member (6) can drive the pin (5) to move axially in a first direction away from the shaft end (301) of the damper (3) under the drive of the lower edge of the lifting drive member (4); the return spring (7) is set inside the housing (1) and located below the lifting movable member (6), and its two ends abut against the lower end of the lifting movable member (6) and the rotating assembly (2) respectively. It is compressed when the lifting movable member (6) moves in the first direction, and pushes the lifting movable member (6) and the pin (5) to move axially in a second direction closer to the shaft end (301) of the damper (3) after the external force stops. When the pin (5) abuts against the shaft end (301) of the damper (3), it reduces the rotation speed of the housing (1) and the door.

2. The axial damping rotation device according to claim 1, characterized in that, The lower end of the lifting drive member (4) forms a continuously undulating drive edge, and the upper end of the lifting movable member (6) forms a continuously undulating mating edge that cooperates with the drive edge.

3. The axial damping rotation device according to claim 2, characterized in that, The driving edge includes two symmetrical and downwardly protruding arc-shaped driving portions (41), and a first arc-shaped recess (42) is formed between two adjacent arc-shaped driving portions (41); the mating edge includes two symmetrical and upwardly protruding arc-shaped mating portions (61), the shape of which is adapted to the first arc-shaped recess (42), the edge of the arc-shaped mating portion (61) slides with the edge of the arc-shaped driving portion (41), and a second recess (62) adapted to the shape of the arc-shaped driving portion (41) is formed between two adjacent arc-shaped mating portions (61).

4. The axial damping rotation device according to claim 3, characterized in that, Each of the arc-shaped drive portions (41) includes two first arc-shaped edges (411) and a first holding point (412) located therebetween; each of the arc-shaped mating portions (61) includes two second arc-shaped edges (611) for press mating and a second holding point (612) located therebetween.

5. The axial damping rotation device according to claim 1, characterized in that, The rotating assembly (2) includes a fixed shaft (21) and a bushing (22). The lower end of the fixed shaft (21) is fixed to the outside, and the upper end extends into the outer shell (1) and passes through the return spring (7). Its lower end extends radially to form a horizontal abutment surface (212) for abutting the end of the spring. The bushing (22) is sleeved on the fixed shaft (21) and has an interference fit with the lower end of the outer shell (1).

6. The axial damping rotation device according to claim 5, characterized in that, The inner sidewall of the lifting movable component (6) is provided with a plurality of guide sliders (63) spaced apart, and the outer peripheral wall of the fixed shaft (21) is provided with a plurality of axially extending guide rails (211) extending circumferentially. Each guide slider (63) is embedded in the corresponding guide rail (211) and can slide axially.

7. The axial damping rotation device according to claim 1, characterized in that, Also includes: An adjusting member (8) is movably disposed on the upper end of the housing (1) and connected to the damper (3) for adjusting the stroke of the damper (3) relative to the pin (5) to change the damping magnitude.

8. The axial damping rotation device according to claim 1, characterized in that, Also includes: The lifting drive (4) is fixed to the first fixing member (9) on the outer shell (1).

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