Patent No.:CN208858845U Date:2018-09-11

Google Patent: https://patents.google.com/patent/CN208858845U/en?oq=CN208858845U

China Patent: http://epub.cnipa.gov.cn/

Abstract

This utility model provides a window damper with buffering and assisting force during compression, including: a hollow piston rod assembly rod, a guide sleeve, a cylinder, a movable locking rod, a return spring, a locking block, a locking block rubber sleeve, and a positioning clamp sleeve. Using this utility model, when the car window is opened, the damper extends, at which point the return spring is in a reset state. When the locking block rubber sleeve enters the narrow cavity part of the cylinder from the wide cavity part of the cylinder, it generates a certain amount of friction with the inner wall of the narrow cavity part of the cylinder, allowing the window to stop at any angle; after the window is fully opened, if the wind blows the window, the damper will enter a compressed state. At this point, the return spring is first compressed, and the elliptical ball-shaped part on the movable locking rod moves, entering the narrow cavity part of the locking block from the wide cavity part, causing the locking block to expand outward, further increasing the friction between the locking block rubber sleeve and the narrow cavity part of the cylinder. This ensures that the opened window is not easily closed by the wind, providing a buffering and assisting force.

Description – A Window Damper with Buffering Assistance during Compression

Technical Field

This utility model belongs to the technical field of dampers, particularly to a window damper with buffering and assisting force during compression.

Background Technology

When operating windows, it’s often necessary to connect a positioning component to maintain the window’s stable state. In existing technology, the components generally used are linkage mechanisms, which, when the window is propped open, can easily be blown back by the wind, failing to effectively maintain the window’s stable open state.

Summary of the Utility Model

The objective of this utility model is to propose a damper with different damping forces during stretching and compression processes, making it easy to open the window, while preventing the window from closing at will when encountering a certain amount of wind.

This utility model provides a window damper with buffering assistance during compression, which includes a hollow piston rod, a cylinder, a movable locking rod, a return spring, a locking block, a locking block rubber sleeve, and a positioning clamp sleeve.

The cylinder’s middle part is designed with a cylinder diameter expansion opening, which divides the inner cavity of the cylinder into a front narrow cavity part and a rear wide cavity part. The movable locking rod is installed inside the cylinder’s inner cavity, with the front end of the movable locking rod coaxially connected to the hollow piston rod assembly. At the connection point of the movable locking rod and the hollow piston rod assembly, there is a spring positioning boss, whose diameter is smaller than the inner diameter of the cylinder’s narrow cavity part.

The return spring is installed on the movable locking rod, behind the spring positioning boss, and the back part of the movable locking rod is designed with an elliptical ball protrusion. The locking block is fitted outside the elliptical ball protrusion, with an internal stepped transition opening inside the locking block, which divides the internal cavity of the locking block into a front wide cavity part and a rear narrow cavity part.

The locking block rubber sleeve fits outside the locking block, with its diameter smaller than the cylinder’s wide cavity part and larger than the cylinder’s narrow cavity part. The positioning clamp sleeve is fixed at a corresponding position on the back end of the movable locking rod, with its diameter larger than the inner diameter of the cylinder’s narrow cavity part.

When the damper stretches, the locking block rubber sleeve moves from the cylinder’s wide cavity part into the narrow cavity part, creating friction with the inner wall of the narrow cavity part. This friction is greater than or equal to the maximum compression force value of the return spring.

When using this utility model, during window opening, the damper is in the stretching motion, with the locking block rubber sleeve creating friction with the inner wall of the cylinder’s narrow cavity part. This friction force is greater than or equal to the maximum compression force value of the return spring. When the window stops at any angle, if wind moves the window, the damper enters a compressed state. The return spring first compresses, moving the elliptical ball protrusion on the movable locking rod from the wide cavity part of the locking block into the narrow cavity part, expanding the locking block outward. This increases the friction between the locking block rubber sleeve and the narrow cavity part of the cylinder, preventing the window from being easily closed by the wind, providing buffering and resistance.

Further Details

Furthermore, the movable locking rod on the front side of the positioning clamp sleeve is also equipped with an anti-slip buffer rubber ring.

Further, a guide sleeve is installed at the front end opening of the cylinder. The inner diameter of the guide sleeve and the outer diameter of the hollow piston rod are slide-fitted.

Additionally, a slot is provided on the outer wall of the guide sleeve, and it is connected to the front end opening of the cylinder through the slot.

Furthermore, a rear block connecting piece is installed at the rear end opening of the cylinder.

The portion of the rear block connecting piece located inside the cylinder has a circular groove that is coaxial with the movable locking rod.

Further, the cylinder diameter expansion opening and the stepped transition opening are both arc-shaped transitions.

Additional aspects and advantages of this utility model will be partially illustrated in the following description, partially become apparent from the description, or be learned through the practice of this utility model.

Description of Drawings

Figure 1 is a schematic structural diagram of a window damper with buffering assistance during compression according to an embodiment of this utility model.

Figure 2 is a schematic structural diagram of the stretched state of the window damper with buffering assistance during compression according to an embodiment of this utility model.

Figure 3 is a schematic structural diagram of the compressed state of the window damper with buffering assistance during compression according to an embodiment of this utility model.

Reference Marked in the Drawings:

1 – Hollow piston rod assembly 2 – Guide sleeve 2 – Slot 3 – Cylinder 31 – Cylinder diameter expansion opening 4 – Movable locking rod 41 – Spring positioning boss 42 – Elliptical ball protrusion 5 – Return spring 6 – Locking block 61 – Stepped transition opening 7 – Locking block rubber sleeve 8 – Anti-slip buffer rubber ring 9 – Positioning clamp sleeve 10 – Rear block connecting piece 101 – Groove

Specific Embodiments

The embodiments of this utility model are described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numbers indicate the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are intended to explain this utility model rather than to limit it.

The embodiments of this utility model provide a window damper with buffering assistance during compression, as shown in Figure 1, including a hollow piston rod assembly (1), a cylinder (3), a movable locking rod (4), a return spring (5), a locking block (6), a locking block rubber sleeve (7), and a positioning clamp sleeve (9).

When describing this utility model, the position of the hollow piston rod assembly (1) is considered the front, and the position of the positioning clamp sleeve (9) is considered the rear. The middle part of the cylinder (3) is provided with a cylinder diameter expansion opening (31), which divides the inner cavity of the cylinder (3) into a front narrow cavity part and a rear wide cavity part. The movable locking rod (4) can move telescopically inside the inner cavity of the cylinder (3). The front end of the movable locking rod (4) is coaxially connected to the hollow piston rod assembly (1). At the connection point of the movable locking rod (4) and the hollow piston rod assembly (1), a spring positioning boss (41) is designed, with a diameter smaller than the inner diameter of the cylinder’s narrow cavity part. The return spring (5) is installed on the movable locking rod (4) behind the spring positioning boss (41). The back part of the movable locking rod (4) is also designed with an elliptical ball protrusion (42).

The locking block (6) is fitted outside the elliptical ball protrusion (42), with an internal stepped transition opening (61) inside the locking block (6), dividing its internal cavity into a front wide cavity part and a rear narrow cavity part. The locking block rubber sleeve (7) is fitted outside the locking block (6), with a diameter smaller than the cylinder’s wide cavity part but slightly larger than the cylinder’s narrow cavity part. Preferably, the locking block is made of high-tenacity elastic material. The positioning clamp sleeve (9) is fixedly connected to the rear end of the movable locking rod (4), with a diameter smaller than the internal diameter of the cylinder’s narrow cavity part. The positioning clamp sleeve prevents the movable locking rod from slipping out and stays in the cylinder’s wide cavity part when the car window is closed.

When the damper stretches, the locking block rubber sleeve (7) moves from the cylinder’s wide cavity part into the narrow cavity part, creating a certain amount of friction with the inner wall of the narrow cavity part. This friction amount is determined based on different car window weights, ensuring it’s light enough for the window to stay open at any angle but also greater or equal to the maximum compression force value of the return spring (5).

Preferably, the cylinder diameter expansion opening (31) and the stepped transition opening (61) are both arc-shaped transitions to ensure smooth movement of the locking block rubber sleeve and the elliptical ball protrusion without causing jamming.

When using this utility model, as shown in Figure 2, the damper is in the stretched state when the window is opened. The locking block rubber sleeve (7) moves from the cylinder’s wide cavity part into the narrow cavity part, creating the necessary friction with the inner wall of the cylinder’s narrow cavity part. This friction amount is determined based on the car window’s size and weight but also must be greater or equal to the maximum compression force value of the return spring (5) for the window to stay in place at any position. When the window is fully opened, if wind moves the window, as shown in Figure 3, the damper enters a compressed state. At this point, the return spring (5) is compressed, and the elliptical ball protrusion (42) moves from the wide cavity part of the locking block (6) into the narrow cavity part, causing the locking block (6) to expand outward. This increases the friction between the locking block rubber sleeve (7) and the narrow cavity part of the cylinder, preventing the opened window from being closed by the wind and providing buffering assistance.

Further Implementation of the Utility Model

In one aspect of the embodiments of this utility model, an anti-slip buffer rubber ring (8) is also installed on the movable locking rod (4) at the front side of the positioning clamp sleeve (9). The anti-slip buffer rubber ring compensates for the excessive movement caused by the assembly gap of components like the locking block and mitigates the impact on the positioning clamp sleeve.

In one aspect of the embodiments of this utility model, a guide sleeve (2) is connected to the front end opening of the cylinder (3). The inner diameter of the guide sleeve (2) is slide-fitted with the diameter of the hollow piston rod assembly (1). A slot (21) is designed on the outer wall of the guide sleeve (2), and the guide sleeve (2) is pressed and positioned connected to the front end opening of the cylinder (3) through the slot (21). The setup of the guide sleeve and the slot ensures the precise coaxial connection of the hollow piston rod assembly and the front end of the cylinder, enhancing tensile strength and movement stability.

In one aspect of the embodiments of this utility model, a rear block connecting piece (10) is connected to the rear end opening of the cylinder (3). Portions of the rear block connecting piece (10) within the cylinder (3) have a circular groove (101) coaxial with the movable locking rod. The design of the rear block connecting piece serves a dual purpose: it connects the damper to the window and limits the position of the movable locking rod within the cylinder. When the window is closed under human force, the locking block and locking block rubber sleeve are fully retracted into the wide cavity part of the cylinder. The return spring naturally opens in the wide cavity part of the cylinder, and the elliptical ball protrusion retracts into the wide cavity part of the locking block.

Although the embodiments of this utility model have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting this utility model. Those skilled in the field can make variations, modifications, replacements, and alterations to the above embodiments within the scope of this utility model.

Claims – A Window Damper with Buffering Assistance during Compression,  invented by LeiYan Gas Spring, a pioneer Chinese Gas Spring Manufacture

1. A window damper with buffering assistance during compression, characterized by:
   • A hollow piston rod assembly, a cylinder, a movable locking rod, a return spring, a locking block, a locking block rubber sleeve, and a positioning clamp sleeve;
   • The middle part of the cylinder is provided with a cylinder diameter expansion opening, which divides the inner cavity of the cylinder into a front narrow cavity part and a rear wide cavity part;
   • The movable locking rod is telescopically installed inside the inner cavity of the cylinder, with the front end of the movable locking rod coaxially connected to the hollow piston rod assembly. The rear side of the connection point between the movable locking rod and the hollow piston rod assembly is provided with a spring positioning boss. The diameter of the spring positioning boss is smaller than the inner diameter of the cylinder’s narrow cavity part. The return spring is installed on the movable locking rod behind the spring positioning boss. The movable locking rod on the rear side of the return spring is also provided with an elliptical ball protrusion;
   • The locking block is sleeved on the outer side of the elliptical ball protrusion, and the internal cavity of the locking block is provided with a stepped transition opening, dividing its internal cavity into a front wide cavity part and a rear narrow cavity part. The locking block rubber sleeve is sleeved on the outer side of the locking block. The outer diameter of the locking block rubber sleeve is smaller than the inner diameter of the cylinder’s wide cavity part but larger than the inner diameter of the cylinder’s narrow cavity part;
   • The positioning clamp sleeve is fixedly connected to the rear end of the movable locking rod, and its outer diameter is larger than the inner diameter of the cylinder’s narrow cavity part;
   • When the damper stretches, the locking block rubber sleeve moves from the cylinder’s wide cavity part into the narrow cavity part, creating friction with the inner wall of the narrow cavity part. This friction force is greater than or equal to the maximum compression force of the return spring.
2. The window damper with buffering assistance during compression according to claim 1, characterized by:
   • The positioning clamp sleeve’s front side of the movable locking rod is also fitted with an anti-slip buffer rubber ring.
3. The window damper with buffering assistance during compression according to claim 1, characterized by:
   • A guide sleeve is fixed at the front end opening of the cylinder. The inner diameter of the guide sleeve is greater than that of the hollow piston rod assembly, which slides within the guide sleeve.
4. The window damper with buffering assistance during compression according to claim 3, characterized by:
   • A slot is provided on the outer wall of the guide sleeve, and the guide sleeve is fastened to the front end opening of the cylinder through the slot.
5. The window damper with buffering assistance during compression according to claim 1, characterized by:
   • A rear block connecting piece is connected to the rear end opening of the cylinder.
6. The window damper with buffering assistance during compression according to claim 5, characterized by:
   • Portions of the rear block connecting piece within the cylinder have a circular groove that is coaxial with the movable locking rod.
7. The window damper with buffering assistance during compression according to any of claims 1-6, characterized by:
   • Both the cylinder diameter expansion opening and the stepped transition opening are arc-shaped transitions.