A worm gear return spring door shaft drive connection device
By using a worm gear return spring door shaft drive connection device, a purely mechanical structure is adopted to solve the problem of unstable door closing caused by hydraulic oil under extreme temperatures, achieving a stable and smooth door closing effect, reducing costs and adapting to different door characteristics.
Patent Information
- Application Number
- CN202522630595.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-11
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-12-11
AI Technical Summary
Existing manual doors suffer from unstable closing due to changes in hydraulic oil performance under extreme temperatures, and are also costly and difficult to match with different door weights and sizes.
The door shaft drive connection device adopts a worm return spring. The door returns to its original position through a purely mechanical motion structure composed of a worm return spring and an eccentric cam. The door is closed by utilizing the elastic restoring force of the worm spring, and the vibration energy is consumed by the friction head and the force-applying screw.
It achieves stable door closing under different temperature conditions, reduces costs, and can match the number of springs according to the characteristics of the door leaf to provide a smooth closing effect and is easy to maintain.
Smart Images
Figure CN224943618U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of building materials and accessories, and specifically relates to a worm gear return spring door shaft drive connection device. Background Technology
[0002] Existing manual doors use floor springs, door closers, and center hangers to drive the door leaf to achieve the return function, which is costly and unreliable. In addition, in winter when the temperature drops to -20 degrees Celsius, the hydraulic oil thickens, making it difficult to close the door; in summer when the temperature is high, the hydraulic oil thins, causing the door to close too quickly, resulting in the door leaf hitting the door frame and causing oil leakage, which can lead to malfunction. Utility Model Content
[0003] To overcome the shortcomings of the prior art, this utility model provides a worm gear return spring door shaft drive connection device.
[0004] This utility model is achieved through the following technical solution: A worm gear return spring door shaft drive connection device includes a panel, characterized in that: an installation cylinder is integrally connected below the panel, and a plurality of worm gear return springs are provided inside the installation cylinder, the inner hook at the center of the worm gear return spring is engaged in the long groove of the worm gear spring shaft, and the outer hook at the end of the worm gear return spring is engaged in the groove of the installation cylinder.
[0005] The end of the spiral spring shaft meshes with the longitudinal shaft via a bevel gear.
[0006] An eccentric cam located above the panel is sleeved on the spiral spring shaft or longitudinal shaft.
[0007] The eccentric cam is provided with a friction head on its outer side, and a spring is sleeved at the end of the friction head. The spring extends into a spring cylinder, and a force-applying screw is provided inside the spring cylinder.
[0008] The friction head is mounted on the positioning pin.
[0009] A washer is provided between the spiral return springs.
[0010] The outer side of the external spiral return spring is provided with a bushing fixing component.
[0011] The beneficial effects of this utility model are: this device adopts a purely mechanical motion structure, without the need for hydraulic damping, and can match one or more spiral return springs according to the weight, size and shape of the door leaf, resulting in light opening force, gentle closing force, low cost, easy maintenance and saving labor. Attached Figure Description
[0012] The present invention will be further described below with reference to the accompanying drawings.
[0013] Appendix Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Appendix Figure 2 For the appendix Figure 1 Explosion structure diagram Figure 1 ; Appendix Figure 3 For the appendix Figure 1 Explosion structure diagram Figure 2 ; Appendix Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this utility model; Appendix Figure 5 For the appendix Figure 4 A schematic diagram of the exploded structure; In the diagram, 1 is the panel, 2 is the mounting cylinder, 3 is the worm return spring, 4 is the inner hook, 5 is the worm spring shaft, 6 is the long groove, 7 is the outer hook, 8 is the slot, 9 is the bevel gear, 10 is the longitudinal shaft, 11 is the eccentric cam, 12 is the friction head, 13 is the spring, 14 is the spring sleeve, 15 is the force-applying screw, 16 is the positioning pin, 17 is the washer, 18 is the bushing fastener, and 19 is the square shaft head. Detailed Implementation
[0014] The attached figure shows a specific embodiment of this utility model.
[0015] Example 1 This embodiment includes a panel 1, with an integrally connected mounting cylinder 2 below the panel 1. The mounting cylinder 2 is provided with several stages of worm return springs 3. The inner hook 4 at the center of the worm return spring 3 is engaged in the long groove 6 of the worm spring shaft 5, and the outer hook 7 at the end of the worm return spring 3 is engaged in the groove 8 of the mounting cylinder 2.
[0016] An eccentric cam 11 is mounted on the spiral spring shaft 5, located above the panel 1. A friction head 12 is provided on the outer side of the eccentric cam 11, and a spring 13 is mounted on the end of the friction head 12. The spring 13 extends into the spring cylinder 14, and a force-applying screw 15 is provided inside the spring cylinder 14.
[0017] The friction head 12 is mounted on the locating pin 16. A washer 17 is provided between the worm return springs 3. A bushing fixing member 18 is provided on the outside of the worm return springs 3.
[0018] Example 2 This embodiment includes a panel 1, with an integrally connected mounting cylinder 2 below the panel 1. The mounting cylinder 2 is provided with several stages of worm return springs 3. The inner hook 4 at the center of the worm return spring 3 is engaged in the long groove 6 of the worm spring shaft 5, and the outer hook 7 at the end of the worm return spring 3 is engaged in the groove 8 of the mounting cylinder 2.
[0019] The end of the spiral spring shaft 5 meshes with the longitudinal shaft 10 via a bevel gear 9. An eccentric cam 11 is sleeved on the longitudinal shaft 10, located above the panel 1. A friction head 12 is provided on the outer side of the eccentric cam 11, and a spring 13 is sleeved at the end of the friction head 12. The spring 13 extends into the spring cylinder 14, and a force-applying screw 15 is provided inside the spring cylinder 14.
[0020] The friction head 12 is mounted on the locating pin 16. A washer 17 is provided between the worm return springs 3. A bushing fixing member 18 is provided on the outside of the worm return springs 3.
[0021] The worm gear return spring door shaft drive connection device of this utility model is installed on the door leaf or door frame. When the door is opened manually, force is applied to the worm gear return spring 3 to make it wind. The worm gear return spring 3 absorbs energy. When the external force disappears, the force of the steel strip of the worm gear return spring 3 returning to its original shape will drive the worm gear spring shaft 5 to rotate, thereby realizing the function of returning to the closed position. In addition, it also has a damping effect to prevent impact. The worm gear spring shaft 5 and the longitudinal shaft 10 are connected by a key and equipped with an eccentric cam 11. The friction head 12 on the panel 1 can consume vibration energy through the force-applying screw 15 and spring 13, which greatly reduces the vibration amplitude and allows the door to close smoothly and gently.
Claims
1. A volute return spring door shaft drive connection device comprising a faceplate (1), characterized by: The panel (1) is integrally connected to the mounting cylinder (2) below. The mounting cylinder (2) is provided with several levels of worm return springs (3). The inner hook (4) at the center of the worm return spring (3) is engaged in the long groove (6) of the worm spring shaft (5). The outer hook (7) at the end of the worm return spring (3) is engaged in the groove (8) of the mounting cylinder (2).
2. The volute return spring door jamb drive connection of claim 1, wherein: The end of the spiral spring shaft (5) meshes with the longitudinal shaft (10) via a bevel gear (9).
3. The volute return spring door jamb drive connection of claim 2, wherein: An eccentric cam (11) located above the panel (1) is sleeved on the spiral spring shaft (5) or longitudinal shaft (10).
4. The volute return spring door jamb drive connection of claim 3, wherein: The eccentric cam (11) is provided with a friction head (12) on the outside, and a spring (13) is sleeved at the end of the friction head (12). The spring (13) extends into the spring cylinder (14), and a force-applying screw (15) is provided inside the spring cylinder (14).
5. The volute return spring door jamb drive connection of claim 4, wherein: The friction head (12) is fitted onto the positioning pin (16).
6. The worm gear return spring door shaft drive connection device according to claim 1, characterized in that: A washer (17) is provided between the spiral return springs (3).
7. The worm gear return spring door shaft drive connection device according to claim 1, characterized in that: The worm return spring (3) is provided with a bushing fixing part (18) on the outside.