Buffering rotating shaft

Abstract

The buffering rotating shaft comprises a sleeve and a connecting piece, an actuating piece, a driven piece, a damper and an end cover are sequentially arranged in the sleeve, a connecting shaft is arranged at the end, away from the driven piece, of the actuating piece, the connecting shaft extends out of the sleeve, a first rotating part is arranged at the other end of the actuating piece, and a second rotating part is arranged at the other end of the connecting shaft. A second rotating part is arranged at the end, away from the damper, of the driven part, the first rotating part is in spiral fit with the second rotating part so that the driven part can axially move in the sleeve when rotating, a limiting block is arranged on the outer side face of the driven part, a limiting groove is formed in the inner wall face of the sleeve in the length direction, and the limiting block is in sliding fit with the limiting groove; one end of the damper is connected with the driven part in an abutting mode, damping buffering is provided for the driven part when the driven part axially moves, and the end cover is in threaded connection with the interior of the sleeve through the outer threads; compared with a traditional structure, the structure is simpler, assembly and disassembly are convenient, production work is facilitated, and later maintenance work is also facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of hinges, in particular to a buffer rotating shaft. Background Art

[0002] When the up-flip door and the down-flip door are opened, they are closed and opened by gravity. Usually, the door panels are subjected to excessive force, resulting in a large impact force on the door panels, causing a loud closing noise or even damage to the door panels. To prevent the door from colliding and making too loud noise, a door closing buffer device is installed on the door or door frame.

[0003] For example, Chinese patent document No. CN201810574358.3 disclosed on April 19, 2024 a door closer, which forms an axial sliding connection and a synchronous rotation cooperation structure between the rotating shaft and the slide sleeve, and the slide sleeve is provided with a spiral groove that cooperates with the drive shaft, so that when an external force rotates the rotating shaft or the rotating outer sleeve, the slide sleeve is driven to slide axially relative to the outer sleeve, and when sliding downward, the pressure spring is compressed to store energy and drive the piston rod to move. When the external force disappears, the pressure spring releases energy to push the slide sleeve to move, and then automatic buffer closing can be achieved when the energy is released; however, the structure is still relatively complex, cumbersome to install, and difficult to disassemble during later maintenance. Utility Model Content

[0004] The purpose of the utility model is to provide a buffer rotating shaft, which has solved the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a buffer rotating shaft, comprising a sleeve and a connecting piece, wherein an actuator, a follower, a damper and an end cover are sequentially arranged in the sleeve, a connecting shaft is arranged at one end of the actuator away from the follower, and the connecting shaft extends to the outside of the sleeve, a first rotating part is arranged at the other end of the actuator, and a second rotating part is arranged at one end of the follower away from the damper, the first rotating part and the second rotating part are spirally matched so that the follower can move axially in the sleeve when rotating, a limiting block is arranged on the outer side surface of the follower, a limiting groove is arranged on the inner wall surface of the sleeve along the length direction, the limiting block and the limiting groove are slidably matched so that the sleeve drives the follower to move axially when rotating, one end of the damper abuts against the follower to provide damping buffering for the follower when it moves axially, the end cover is screwed into the sleeve through an external thread, and the end cover abuts against the damper, and the connecting piece is connected to the part of the connecting shaft extending out of the sleeve.

[0006] Furthermore, two first rotating cams are arranged along the axis of the first rotating part, and a first matching portion is formed between the two first rotating cams; two second rotating cams are arranged along the axis of the second rotating part, and a second matching portion is formed between the two second rotating cams; the first rotating cam is adapted to the second matching portion, and the second rotating cam is adapted to the first matching portion.

[0007] Furthermore, the first rotating cam and the second rotating cam are both provided with matching spiral inclined surfaces.

[0008] Furthermore, a bearing is arranged in the sleeve, and the actuating member is passed through the bearing, so that the actuating member is rotatably arranged in the sleeve through the bearing.

[0009] Furthermore, the connecting shaft extending out of the sleeve is an external hexagonal structure, one end of the connecting piece is provided with an internal hexagonal groove, the connecting shaft is inserted into the internal hexagonal groove, and is threadedly connected to the connecting shaft through the connecting piece via a fixing screw.

[0010] Furthermore, it also includes a pressure spring, which is sleeved on the telescopic rod of the damper, and one end of the pressure spring abuts on the follower, and the other end abuts on the end of the cylinder of the damper.

[0011] Furthermore, a damping adjustment member is provided at the center of the end cover, and the damping adjustment member is an adjusting top screw. The damping adjustment member is screwed into the end cover, and one end of the damping adjustment member extends outside the end cover to abut against the damper, so that the damping adjustment member is used to adjust the damping force provided by the damper.

[0012] Compared with the prior art, the main beneficial effects of the utility model are: through the spiral cooperation between the first rotating part of the actuator and the second rotating part of the follower, the follower moves axially in the sleeve when it rotates, and when the sleeve rotates, it drives the follower to rotate. During the axial movement of the follower, the damper provides a buffering force for it, thereby achieving the buffering effect of the buffer shaft; compared with the traditional structure, the utility model is simpler and easier to assemble and disassemble, which is not only beneficial to production work, but also convenient for later maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a subjective three-dimensional schematic diagram of the utility model.

[0014] Figure 2 It is a schematic diagram of the installation state of the utility model.

[0015] Figure 3 It is a schematic diagram of the explosion structure of the utility model.

[0016] Figure 4 It is a schematic diagram of the connection between the actuator and the driven member in the utility model.

[0017] In the figure: sleeve 10, limiting groove 101, connecting member 20, actuator 30, first rotating part 301, first rotating cam 3011, first matching part 3012, connecting shaft 302, follower 40, second rotating part 401, second rotating cam 4011, second matching part 4012, limiting block 402, damper 50, end cover 60, bearing 70, pressure spring 80, damping adjustment member 90. DETAILED DESCRIPTION

[0018] The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0019] It should be understood that the various steps described in the method implementation of the present utility model can be performed in different orders and / or performed in parallel. In addition, the method implementation may include additional steps and / or omit the steps shown. The scope of the present utility model is not limited in this respect.

[0020] The term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "connected" may be directly connected or indirectly connected through intermediate components (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0021] It should be noted that the concepts such as "first" and "second" mentioned in the present invention are only used to distinguish between devices, modules or units, and are not used to limit these devices, modules or units to be different devices, modules or units, nor are they used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0022] like Figures 1 to 4 A buffer rotating shaft shown is mainly used on an up-flip door or a down-flip door, and includes a sleeve 10 installed on the door body and a connector 20 installed on the door frame; to be precise, the sleeves 10 of the two rotating shafts are respectively installed on the two ends of a transmission tube, and the rotating shaft is connected to the transmission tube through a limiting structure on its outer side, and the transmission tube is fixedly connected to the door body, and the connector 20 is inserted into the inner side of the cabinet through its end, and when the flip door is opened or closed, the sleeve 10 is driven to rotate relative to the connector 20.

[0023] The sleeve 10 is provided with an actuator 30, a follower 40, a damper 50 and an end cover 60 in the sleeve 10 in sequence. The end of the actuator 30 away from the follower 40 is provided with a connecting shaft 302, and the connecting shaft 302 extends to the outside of the sleeve 10. The other end of the actuator 30 is provided with a first rotating part 301, and the end of the follower 40 away from the damper 50 is provided with a second rotating part 401. The first rotating part 301 and the second rotating part 401 are spirally matched so that the follower 40 moves axially in the sleeve 10 when rotating. The outer side surface of the follower 40 is provided with a limit block 402. The inner wall surface of the sleeve 10 is provided with a limit groove 101 along the length direction, and the limit block 402 is slidably matched with the limit groove 101, so that the sleeve 10 drives the follower 40 to move axially when rotating. One end of the damper 50 abuts against the follower 40, providing damping buffering for the follower 40 when it moves axially. When the door body of the up-flip door or the down-flip door is under its own weight and flips down, the sleeve 10 is driven to rotate. When the sleeve 10 rotates, it drives the follower 40 to rotate. During the axial movement of the follower 40, the damper 50 provides it with a buffering force, thereby realizing the buffering effect of the buffer shaft, so that the door body is buffered downward to close or open.

[0024] The end cover 60 is screwed into the sleeve 10 through an external thread, and the end cover 60 abuts against the damper 50. The connecting member 20 is connected to the part of the connecting shaft 302 extending outside the sleeve 10. Compared with the traditional structure, it is simpler and easier to assemble and disassemble, which is beneficial to production work and convenient for subsequent maintenance work.

[0025] Two first rotating cams 3011 are arranged along the axis of the first rotating part 301, and a first matching part 3012 is formed between the two first rotating cams 3011; two second rotating cams 4011 are arranged along the axis of the second rotating part 401, and a second matching part 4012 is formed between the two second rotating cams 4011; the first rotating cam 3011 is matched with the second matching part 4012, and the second rotating cam 4011 is matched with the first matching part 3012; and the first rotating cam 3011 and the second rotating cam 4011 are both provided with matching spiral inclined surfaces; it should be noted that the first rotating cam 3011 and the second rotating cam 4011 are the common transmission structures for spiral conversion axial motion in this field.

[0026] In addition, in another embodiment, the first rotating part 301 and the second rotating part 401 respectively adopt a spiral tooth structure and a spiral groove structure, which can also complete the spiral conversion axial movement.

[0027] A bearing 70 is disposed in the sleeve 10 , and the actuator 30 is passed through the bearing 70 , so that the actuator 30 is rotatably disposed in the sleeve 10 through the bearing 70 . The bearing 70 can make the actuator 30 rotate more smoothly in the sleeve 10 .

[0028] The connecting shaft 302 extends out of the sleeve 10 and has an external hexagonal structure. One end of the connecting piece 20 is provided with an internal hexagonal groove. The connecting shaft 302 is inserted into the internal hexagonal groove. After the actuator 30 is installed in the sleeve 10, the fixing screw passes through the connecting piece 20 and is connected to the connecting shaft 302, which facilitates the fixing connection between the connecting piece 20 and the connecting shaft 302 and facilitates subsequent maintenance.

[0029] In this embodiment, a pressure spring 80 is also included. The pressure spring 80 is sleeved on the telescopic rod of the damper 50, and one end of the pressure spring 80 abuts against the follower 40, and the other end abuts against the cylinder end of the damper 50; it should be understood that when the door body flips down due to its own weight, the pressure spring 80 always provides elastic force for the follower 40 to ensure that the follower 40 can return to its position to achieve the next buffering.

[0030] A damping adjustment member 90 is provided at the center of the end cover 60. The damping adjustment member 90 is an adjusting top screw. The damping adjustment member 90 is screwed into the end cover 60, and one end of the damping adjustment member 90 extends outside the end cover 60 to abut against the damper 50, so that the damping adjustment member 90 is used to adjust the damping force provided by the damper 50.

[0031] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A buffer rotating shaft, characterized in that: The invention comprises a sleeve (10) and a connecting member (20), wherein an actuating member (30), a driven member (40), a damper (50) and an end cover (60) are sequentially arranged in the sleeve (10), wherein one end of the actuating member (30) away from the driven member (40) is provided with a connecting shaft (302), wherein the connecting shaft (302) extends outside the sleeve (10), and the other end of the actuating member (30) is provided with a first rotating portion (301), and one end of the driven member (40) away from the damper (50) is provided with a second rotating portion (401), wherein the first rotating portion (301) and the second rotating portion (401) are screw-matched, so that when the driven member (40) rotates, it rotates with respect to the sleeve (10). The driven member (40) is provided with a limit block (402) on its outer side surface, and a limit groove (101) is provided on the inner wall surface of the sleeve (10) along the length direction. The limit block (402) and the limit groove (101) are slidably matched to enable the sleeve (10) to drive the driven member (40) to rotate and move axially. One end of the damper (50) is in contact with the driven member (40) to provide damping buffer for the driven member (40) when the driven member (40) moves axially. The end cover (60) is screwed into the sleeve (10) through an external thread, and the end cover (60) is in contact with the damper (50). The connecting member (20) is connected to the part of the connecting shaft (302) extending outside the sleeve (10).

2. A buffer rotating shaft according to claim 1, characterized in that: Two first rotating cams (3011) are arranged along the axis of the first rotating part (301), and a first matching part (3012) is formed between the two first rotating cams (3011); two second rotating cams (4011) are arranged along the axis of the second rotating part (401), and a second matching part (4012) is formed between the two second rotating cams (4011); the first rotating cam (3011) is matched with the second matching part (4012), and the second rotating cam (4011) is matched with the first matching part (3012).

3. A buffer rotating shaft according to claim 2, characterized in that: The first rotating cam (3011) and the second rotating cam (4011) are both provided with matching spiral inclined surfaces.

4. The buffer rotating shaft according to claim 1, characterized in that: A bearing (70) is arranged in the sleeve (10), and the actuating member (30) is passed through the bearing (70), so that the actuating member (30) is rotatably arranged in the sleeve (10) through the bearing (70).

5. The buffer rotating shaft according to claim 1, characterized in that: The connecting shaft (302) extends out of the sleeve (10) and has an external hexagonal structure. One end of the connecting piece (20) is provided with an internal hexagonal groove. The connecting shaft (302) is inserted into the internal hexagonal groove and is threaded onto the connecting shaft (302) by passing a fixing screw through the connecting piece (20).

6. The buffer rotating shaft according to claim 1, characterized in that: It also includes a pressure spring (80), which is sleeved on the telescopic rod of the damper (50), and one end of the pressure spring (80) abuts against the follower (40), and the other end abuts against the end of the cylinder of the damper (50).

7. The buffer rotating shaft according to claim 1, characterized in that: A damping adjustment member (90) is arranged at the center of the end cover (60). The damping adjustment member (90) is an adjustment top screw. The damping adjustment member (90) is screwed into the end cover (60), and one end of the damping adjustment member (90) extends outside the end cover (60) to abut against the damper (50), so that the damping adjustment member (90) is used to adjust the damping force provided by the damper (50).

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