Damping buffer axle core

Abstract

The utility model discloses a damping buffer axle core, including axle core main part, the axle core main part includes sleeve and rotation cover, be provided with transmission shaft, damper and spring in the sleeve, the transmission shaft is worn in the sleeve, and is connected with rotation cover, damper and spring all act on transmission shaft, to make damper and spring provide buffer and automatic closing effect force for transmission shaft, wherein, the end of sleeve is equipped with rotation part, rotation cover rotation setting is in rotation part, one end of transmission shaft is connected with rotation cover, and the other end is butt joint with damper, makes damper can provide damping buffer for rotation cover in the door closing process, the spring cover is set on transmission shaft, and one end is butt joint with transmission shaft, and the other end is butt joint with rotation part, makes spring can provide automatic closing effect force for rotation cover in the door closing process, this structure not only is more convenient separation dismounting, and is easier to guarantee the concentricity of axle core.

Description

Technical Field

[0001] This utility model relates to the field of hardware accessories, and in particular to a damping buffer shaft core. Background Technology

[0002] Damping buffers are used to dissipate impact energy, with hydraulic damping buffers being the most common type. Their working principle is as follows: when a hydraulic damping buffer is subjected to an impact force, it pushes a piston inside the buffer to move, simultaneously forcing the oil in the buffer chamber out through a throttle orifice and into another chamber. At this point, the friction between the throttle orifice and the oil, as well as the internal friction between oil molecules, creates a damping force on the impact load. This process consumes a significant amount of kinetic energy, thus achieving a buffering effect. However, when a hydraulic damping buffer is subjected to an impact load, due to the built-in oil circuit achieving the buffering effect, a relatively large oil pressure can form locally within the buffer chamber. The structure for adjusting the opening and closing gate is quite complex, requiring proper sealing. This not only results in complex manufacturing processes and high production costs, but also, due to structural limitations, a short service life, making maintenance and replacement of critical parts difficult.

[0003] On March 14, 2025, the applicant authorized the publication of a transmission structure for a damping buffer device with publication number CN222615916U. This structure includes a sleeve, a drive shaft, a compression spring, and a damper. An axially arranged movable cavity is provided within the sleeve, which is adapted to the drive shaft. The drive shaft is axially movably disposed within the movable cavity, with its two ends respectively abutting against the compression spring and the damper, causing the compression spring and damper to exert forces on both ends of the drive shaft. A transverse pin passes radially through the drive shaft. A rotating sleeve is rotatably disposed on the outer wall of the sleeve, connected to the transverse pin. The rotating sleeve, when rotating, drives the transverse pin and the drive shaft to move axially. When the rotating sleeve rotates, the compression spring and the damper exert forces on both ends of the drive shaft, thereby achieving automatic return and damping buffer functions. However, this shaft core structure is cumbersome to assemble with the hinge, and it is difficult to disassemble from the hinge blades after installation. Therefore, further improvements are necessary. Utility Model Content

[0004] The purpose of this invention is to provide a damping buffer shaft core that solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A damping buffer shaft core includes a shaft core body, which includes a sleeve and a rotating sleeve. A drive shaft, a damper, and a spring are disposed within the sleeve. The drive shaft passes through the sleeve and is connected to the rotating sleeve. When the rotating sleeve rotates, it drives the drive shaft to reciprocate axially, converting rotational motion into axial motion. Both the damper and the spring act on the drive shaft, providing buffering and automatic closing force. The sleeve has a rotating portion at one end, and the rotating sleeve is rotatably mounted on this portion. One end of the drive shaft is connected to the rotating sleeve, and the other end abuts against the damper, allowing the damper to provide damping buffering for the rotating sleeve during door closing. The spring is sleeved on the drive shaft, with one end abutting against the drive shaft and the other end abutting against the rotating portion, providing automatic closing force for the rotating sleeve during door closing.

[0007] Preferably, the rotating part has two spiral grooves symmetrically arranged along the center, the spiral grooves penetrate the rotating part radially, and a cross pin is movably arranged in the spiral grooves. The two side walls of the rotating sleeve have two long grooves symmetrically arranged, the long grooves are arranged along the axial direction of the rotating sleeve, and the two ends of the cross pin extend into the two spiral grooves and the two long grooves respectively, so that the cross pin moves along the axial direction of the spiral grooves under the drive of the rotating sleeve.

[0008] Preferably, a door closing force adjustment element is provided between the damper and the spring. The door closing force adjustment element is coaxially connected to the end of the transmission shaft away from the rotating sleeve. The telescopic end of the damper passes through the door closing force adjustment element and abuts against the transmission shaft. The end of the spring away from the rotating part abuts against the door closing force adjustment element.

[0009] Preferably, the outer wall of the end of the drive shaft is provided with an external thread, and the inner side of the door closing force adjustment element is provided with an internal thread, so that the door closing force adjustment element is threadedly engaged with the drive shaft.

[0010] Preferably, the closing force adjustment element has an internal hexagonal groove on the end away from the drive shaft.

[0011] Preferably, the door closing force adjustment element has a through hole along the axial center, the through hole has an internal thread and an internal hexagonal groove, and the telescopic end of the damper passes through the through hole and abuts against the drive shaft.

[0012] Preferably, the end of the damper away from the drive shaft abuts against the damping adjustment element, which is screwed into the sleeve.

[0013] Preferably, both the outer wall surfaces of the sleeve and the rotating sleeve are provided with spline patterns.

[0014] Compared with the prior art, this technical solution provides a damping buffer shaft core, which has the following beneficial effects: by providing a rotating part at the end of the sleeve for the rotating sleeve to rotate, and connecting one end of the transmission shaft to the rotating sleeve and the other end to the damper, the damper can provide damping buffer for the rotating sleeve during the closing process. The spring is sleeved on the transmission shaft so that the spring can provide an automatic closing force for the rotating sleeve during the closing process. It is not only simpler than the traditional structure and easier to install and disassemble, but also makes it easier to ensure the concentricity of the shaft core after installation. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0018] Figure 3 This is an exploded view diagram of this utility model.

[0019] Figure 4 This is a schematic diagram of the door closing force adjustment element in this utility model.

[0020] As shown in the figure: shaft core body 300, sleeve 310, rotating part 311, spiral groove 312, rotating sleeve 320, long groove 321, transmission shaft 330, damper 340, spring 350, door closing force adjustment element 360, internal hexagonal groove 361, through hole 362, horizontal pin 370, damping adjustment element 380. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. The preferred embodiments of this utility model will now be described in more detail with reference to the accompanying drawings. Although the preferred embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this utility model more thorough and complete, and to fully convey the scope of this utility model to those skilled in the art.

[0022] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0023] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0024] In the description of this utility model, it should be understood that the terms "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] It should be understood that although the terms "first," "second," "third," etc., may be used to describe various components in this invention, this information should not be limited to these terms. These terms are only used to distinguish components of the same type from each other. For example, without departing from the scope of this invention, a first component may also be referred to as a second component, and similarly, a second component may also be referred to as a first component. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] The technical solutions of the embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0028] refer to Figures 1 to 4 A damping buffer shaft core includes a shaft core body 300, which includes a sleeve 310 and a rotating sleeve 320. A drive shaft 330, a damper 340, and a spring 350 are disposed inside the sleeve 310. The drive shaft 330 passes through the sleeve 310 and is connected to the rotating sleeve 320. When the rotating sleeve 320 rotates, it drives the drive shaft 330 to reciprocate axially, realizing the conversion of rotational motion into axial motion. The damper 340 and the spring 350 both act on the drive shaft 330 so that the damper 340 and the spring 350 provide buffering and automatic closing force for the drive shaft 330.

[0029] In this embodiment, the end of the sleeve 310 is provided with a rotating part 311, which is integrally formed with the sleeve 310. The rotating sleeve 320 is rotatably mounted on the rotating part 311. One end of the drive shaft 330 is connected to the rotating sleeve 320, and the other end abuts against the damper 340, so that the damper 340 can provide damping buffer for the rotating sleeve 320 during the closing process. The spring 350 is sleeved on the drive shaft 330, with one end abutting against the drive shaft 330 and the other end abutting against the rotating part 311, so that the spring 350 can provide automatic closing for the rotating sleeve 320 during the closing process. The force; more precisely, by providing a rotating part 311 at the end of the sleeve 310 for the rotating sleeve 320 to rotate, and connecting one end of the drive shaft 330 to the rotating sleeve 320 and the other end to the damper 340, the damper 340 can provide damping buffer for the rotating sleeve 320 during the closing process. The spring 350 is sleeved on the drive shaft 330, so that the spring 350 can provide an automatic closing force for the rotating sleeve 320 during the closing process. It is not only simpler than the traditional structure, but also easier to install and disassemble. Moreover, it is easier to ensure the concentricity of the shaft core after installation.

[0030] Two spiral grooves 312 are symmetrically arranged along the center of the rotating part 311. The spiral grooves 312 penetrate the rotating part 311 radially. A horizontal pin 370 is movably arranged in the spiral grooves 312. Two long grooves 321 are symmetrically arranged on both sides of the rotating sleeve 320. The long grooves 321 are arranged along the axial direction of the rotating sleeve 320. The two ends of the horizontal pin 370 extend into the two spiral grooves 312 and the two long grooves 321 respectively, so that the horizontal pin 370 moves along the axial direction of the spiral grooves 312 under the drive of the rotating sleeve 320.

[0031] A closing force adjustment element 360 is provided between the damper 340 and the spring 350. The closing force adjustment element 360 is coaxially connected to the end of the drive shaft 330 away from the rotating sleeve 320. The telescopic end of the damper 340 passes through the closing force adjustment element 360 and abuts against the drive shaft 330. The end of the spring 350 away from the rotating part 311 abuts against the closing force adjustment element 360. It should be noted that the diameter of the rotating part 311 is smaller than that of the sleeve 310, so that a step is formed inside the sleeve 310, and the spring 350 abuts against the step.

[0032] The outer wall of the end of the drive shaft 330 is provided with an external thread, and the inner side of the closing force adjustment element 360 is provided with an internal thread, so that the closing force adjustment element 360 and the drive shaft 330 are threadedly engaged. The end of the closing force adjustment element 360 away from the drive shaft 330 is provided with an internal hexagonal groove 361. By inserting a hexagonal tool into the internal hexagonal groove 361 to rotate the closing force adjustment element 360, the relative position of the closing force adjustment element 360 and the drive shaft is changed, which further changes the elastic potential energy of the spring 350 on the drive shaft 330, thereby realizing the adjustment of the closing force.

[0033] The door closing force adjustment element 360 has a through hole 362 along its axial center. The through hole 362 has an internal thread and an internal hexagonal groove 361. The telescopic end of the damper 340 passes through the through hole 362 and abuts against the drive shaft 330. After the door closing force adjustment element 360 completes the door closing force adjustment, the telescopic end of the damper 340 is inserted into the through hole 362 and generates a force with the drive shaft 330. This not only shortens the overall length of the damping buffer shaft core, but also allows for direct transmission through the drive shaft 330, making the power transmission conversion more direct.

[0034] The end of the damper 340 away from the drive shaft 330 abuts against the damping adjustment element 380, which is screwed into the sleeve 310. After assembly, the damper 340 is in a single-force state, meaning that the damping force of the damper 340 is the same from the start to the end of the movement. When the damping adjustment element 380 is screwed in towards the damper 340 by 1-2mm, a two-force state can be switched, which allows the damping force of the damper to be variable from the start of the movement to the specified stroke. In addition, the damper 340 can be removed by unscrewing the damping adjustment element 380, which facilitates later maintenance and replacement. It can also be replaced with a damper 340 of different specifications according to different application scenarios.

[0035] Both the outer wall surfaces of the sleeve 310 and the rotating sleeve 320 are provided with spline patterns. The sleeve 310 and the rotating sleeve 320 are respectively connected to the external connection unit through spline patterns to provide damping and buffering functions.

[0036] The present invention has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different focuses; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to the present invention. Furthermore, it is understood that the steps in the method of the present invention embodiments can be adjusted, combined, and deleted according to actual needs, and the structure in the device of the present invention embodiments can be combined, divided, and deleted according to actual needs.

[0037] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A damping buffer shaft core, comprising a shaft core body (300), the shaft core body (300) comprising a sleeve (310) and a rotating sleeve (320), wherein a drive shaft (330), a damper (340) and a spring (350) are disposed within the sleeve (310), the drive shaft (330) passes through the sleeve (310) and is connected to the rotating sleeve (320), and when the rotating sleeve (320) rotates, it drives the drive shaft (330) to reciprocate axially, realizing the conversion of rotational motion into axial motion, wherein the damper (340) and the spring (350) both act on the drive shaft (330), so that the damper (340) and the spring (350) provide buffering and automatic closing force for the drive shaft (330), characterized in that: The sleeve (310) has a rotating part (311) at its end. The rotating sleeve (320) is rotatably mounted on the rotating part (311). One end of the drive shaft (330) is connected to the rotating sleeve (320), and the other end abuts against the damper (340), so that the damper (340) can provide damping buffer for the rotating sleeve (320) during the closing process. The spring (350) is sleeved on the drive shaft (330), with one end abutting against the drive shaft (330) and the other end abutting against the rotating part (311), so that the spring (350) can provide automatic closing force for the rotating sleeve (320) during the closing process.

2. The damping buffer shaft core according to claim 1, characterized in that: The rotating part (311) is provided with two spiral grooves (312) symmetrically along the center. The spiral grooves (312) penetrate the rotating part (311) radially. A horizontal pin (370) is movably arranged in the spiral grooves (312). Two long grooves (321) are symmetrically arranged on both sides of the rotating sleeve (320). The two ends of the horizontal pin (370) extend into the two spiral grooves (312) and the two long grooves (321) respectively, so that the horizontal pin (370) moves along the axial direction of the spiral grooves (312) under the drive of the rotating sleeve (320).

3. A damping buffer shaft core according to claim 1, characterized in that: A door closing force adjustment element (360) is provided between the damper (340) and the spring (350). The door closing force adjustment element (360) is coaxially connected to the end of the drive shaft (330) away from the rotating sleeve (320). The telescopic end of the damper (340) passes through the door closing force adjustment element (360) and abuts against the drive shaft (330). The end of the spring (350) away from the rotating part (311) abuts against the door closing force adjustment element (360).

4. A damping buffer shaft core according to claim 3, characterized in that: The outer wall of the end of the drive shaft (330) is provided with an external thread, and the inner side of the door closing force adjustment element (360) is provided with an internal thread, so that the door closing force adjustment element (360) and the drive shaft (330) are threadedly engaged.

5. A damping buffer shaft core according to claim 4, characterized in that: The closing force adjustment element (360) has an internal hexagonal groove (361) on the end away from the drive shaft (330).

6. A damping buffer shaft core according to claim 5, characterized in that: The door closing force adjustment element (360) has a through hole (362) along the axial center. The through hole (362) has an internal thread and an internal hexagonal groove (361). The telescopic end of the damper (340) passes through the through hole (362) and abuts against the drive shaft (330).

7. A damping buffer shaft core according to claim 1, characterized in that: The end of the damper (340) away from the drive shaft (330) abuts against the damping adjustment element (380), which is screwed into the sleeve (310).

8. A damping buffer shaft core according to claim 1, characterized in that: Both the outer wall surfaces of the sleeve (310) and the rotating sleeve (320) are provided with spline patterns.

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