Self-closing door buffer hinge

Abstract

The utility model discloses a self-closing door buffer hinge which comprises a first hinge piece and a second hinge piece which can rotate coaxially and relatively, an upper sleeve and a lower sleeve are arranged at the upper end and the lower end of one side edge of the first hinge piece respectively, a middle sleeve is arranged in the middle of one side edge of the second hinge piece, and the upper sleeve, the lower sleeve and the middle sleeve are arranged in a mandrel in a sleeved mode. The mandrel at least comprises a mandrel body, a transmission shaft sleeve, an elastic mechanism and a damping mechanism and further comprises a first limiting pin and a second limiting pin, a first semicircular groove and a second semicircular groove are formed in the inner wall face of the upper sleeve and the inner wall face of the middle sleeve respectively, and a third semicircular groove and a fourth semicircular groove are formed in the outer wall face of the mandrel body and the outer wall face of the transmission shaft sleeve respectively. The first limiting pin is adopted to be matched with the first semicircular groove and the third semicircular groove, the second semicircular groove and the fourth semicircular groove are connected in a matched mode through the second limiting pin, the effect of limiting transmission can be achieved, the friction force is small during installation, the installation difficulty of workers is low, and therefore the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of buffers, in particular to a buffer hinge for a self-closing door. Background Art

[0002] Hinges are widely used as hinges for building doors and windows, and traditional folding hinges are used, which only have a hinge function. During the door closing process, if the door cannot be closed by its own inertia, the user usually needs to push one side of the door to move it toward the door frame. This way of closing the door may easily lead to excessive force causing excessive collision noise between the door and the door frame or huge impact between the door and the door frame, which will reduce the service life of the door. In order to avoid collisions, more and more people use hydraulic buffer hinges, but currently hydraulic buffer hinges generally have built-in oil circuits, and the internal oil circuit reset components of the hydraulic buffer hinges and the components of the hydraulic buffer mechanism are all arranged in the same cavity. During use, foreign matter generated by the movement and wear of the reset components can easily block the oil circuit of the hydraulic buffer, causing the product to be easily damaged. In addition, the complex internal structure of the product leads to a large product volume, which is difficult to coordinate with the door leaf.

[0003] On March 29, 2024, the applicant disclosed a buffer hinge core shaft with announcement number CN220687060U. By arranging a transmission sleeve, a shaft core, a spiral sleeve, a spring and a damper in the sleeve, the transmission sleeve is meshed with the spiral sleeve to make it perform spiral lifting and lowering activities. When the door is opened, the transmission sleeve moves axially to push the spring to compress and store energy. When the door is closed, the spring releases the compressed stored energy and pushes the transmission sleeve to move axially. The damper offsets part of the potential energy of the spring for the transmission sleeve, and the transmission sleeve moves slowly axially to enable the buffer core shaft to realize the buffering function; in addition, it also includes a connecting sleeve, and the outer wall surfaces of the connecting sleeve and the sleeve are provided with spline patterns, and the connecting sleeve and the sleeve spline patterns are connected with different hinges; although a variety of hinge types can be connected, the method of connecting the spline pattern with the sleeve of the hinge requires equipment for positioning and fixing, and the installation process is very cumbersome, resulting in low production efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a self-closing door buffer hinge, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a self-closing door buffer hinge, comprising a first hinge piece and a second hinge piece which can rotate coaxially relative to each other, an upper sleeve and a lower sleeve are respectively arranged at the upper and lower ends of one side of the first hinge piece, a middle sleeve is arranged at the middle part of one side of the second hinge piece, the upper sleeve, the lower sleeve and the middle sleeve are sleeved in a core shaft, the core shaft at least comprises an axis core, a transmission shaft sleeve, an elastic mechanism and a damping mechanism, a sliding pin is passed through the axis core, a spiral groove is arranged on one end wall surface of the transmission shaft sleeve, both ends of the sliding pin extend into the spiral groove, and the sliding pin slides along the spiral groove, so that the axis core is driven to move linearly when the transmission shaft sleeve rotates, and the elastic mechanism and the damping mechanism act respectively The force is exerted on both ends of the shaft core, so that the elastic mechanism provides elastic force for the shaft core during the opening and closing process of the buffer hinge, and the damping mechanism provides buffering force for the shaft core during the closing process of the buffer hinge, and is characterized in that: it also includes a first limit pin and a second limit pin, a first semicircular groove is arranged on the inner wall surface of the lower sleeve along the length direction, a second semicircular groove is arranged on the inner wall surface of the middle sleeve along the length direction, a third semicircular groove is arranged on the outer wall surface of the shaft core along the length direction, and a fourth semicircular groove is arranged on the outer wall surface of the transmission sleeve along the length direction, the first limit pin is adaptively connected with the second and third semicircular grooves, and the second limit pin is adaptively connected with the first and fourth semicircular grooves.

[0006] Furthermore, there are two of each of the first semicircular groove, the second semicircular groove, the third semicircular groove, and the fourth semicircular groove, and they are all arranged in a symmetrical structure.

[0007] Furthermore, it also includes a fixed sleeve, which is fixed in the upper sleeve through an external thread, and an upper end cover is provided at the end of the fixed sleeve.

[0008] Furthermore, the elastic mechanism includes a spring, a top block and a first top screw, one end of the spring abuts against the shaft core, and the other end abuts against the top block, the first top screw is threaded into the fixed sleeve, and the end of the first top screw away from the adjustment end abuts against the top block.

[0009] Furthermore, a lower end cover is provided at the bottom of the lower sleeve, and the damping mechanism includes a damper and a second top screw, the protruding end of the damper abuts against the shaft core, the second top screw is screwed into the lower end cover, and one end of the second top screw away from the adjusting end abuts against the cylinder end of the damper.

[0010] Furthermore, a first sliding bearing is arranged between the upper sleeve and the middle sleeve, and a second sliding bearing is arranged between the lower sleeve and the middle sleeve. Both the first sliding bearing and the second sliding bearing are sleeved on the core shaft.

[0011] Compared with the prior art, the main beneficial effect of the utility model is: by respectively opening the first semicircular groove and the second semicircular groove on the inner wall surfaces of the upper sleeve and the middle sleeve, and respectively opening the third semicircular groove and the fourth semicircular groove on the outer wall surfaces of the shaft core and the transmission sleeve, a first limit pin is adapted to the first semicircular groove and the third semicircular groove, and a second limit pin is used to adapt and connect the second semicircular groove and the fourth semicircular groove. Compared with the friction connection of the spline pattern, this structure does not require positioning and installation, and the cylindrical first limit pin and the second limit pin can not only achieve the function of limiting transmission, but also have less friction during installation, and the workers have low installation difficulty, thereby speeding up production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a subjective three-dimensional schematic diagram of the utility model.

[0013] Figure 2 It is a schematic diagram of the installation state of the utility model.

[0014] Figure 3 It is a schematic diagram of the explosion structure of the utility model.

[0015] In the figure: a first hinge piece 10, an upper sleeve 110, a lower sleeve 120, a first semicircular groove 121, a second hinge piece 20, a middle sleeve 210, a second semicircular groove 211, a mandrel 30, a shaft core 31, a third semicircular groove 311, a transmission sleeve 32, a spiral groove 321, a fourth semicircular groove 322, a fixed sleeve 33, an upper end cover 331, an elastic mechanism 34, a spring 341, a top block 342, a first top screw 343, a damping mechanism 35, a damper 351, a second top screw 352, a first limit pin 36, a second limit pin 37, a sliding pin 38, a lower end cover 40, a first sliding bearing 50, and a second sliding bearing 60. DETAILED DESCRIPTION

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] like Figures 1 to 3 A self-closing door buffer hinge shown in the figure comprises a first hinge piece 10 and a second hinge piece 20 which can rotate coaxially relative to each other, an upper sleeve 110 and a lower sleeve 120 are respectively arranged at the upper and lower ends of one side of the first hinge piece 10, a middle sleeve 210 is arranged at the middle of one side of the second hinge piece 20, and the upper sleeve 110, the lower sleeve 120 and the middle sleeve 210 are sleeved in a core shaft 30;

[0021] In this embodiment, the core shaft 30 at least includes a shaft core 31, a transmission sleeve 32, a fixed sleeve 33, an elastic mechanism 34, and a damping mechanism 35. A sliding pin 38 is inserted into the shaft core 31. A spiral groove 321 is provided on one end wall of the transmission sleeve 32. Both ends of the sliding pin 38 extend into the spiral groove 321, and the sliding pin 38 slides along the spiral groove 321, so that when the transmission sleeve 32 rotates, the shaft core 31 is driven to move linearly. To be precise, a movable sleeve is provided in the spiral groove 321, and the movable sleeve is preferably made of plastic. The end of the sliding pin 38 is inserted into the movable sleeve. When the transmission sleeve 32 rotates relative to the center sleeve 210 and drives the shaft core 31 to move linearly, the sliding pin 38 slides in the spiral groove 321 through the movable sleeve at the end, thereby reducing the noise generated by the friction between the sliding pin 38 and the spiral groove 321.

[0022] In addition, the fixed sleeve 33 is fixed in the upper sleeve 110 through external threads, and an upper end cover 331 is provided at the end of the fixed sleeve 33 .

[0023] Specifically, the elastic mechanism 34 and the damping mechanism 35 act on both ends of the shaft core 31 respectively;

[0024] The elastic mechanism 34 includes a spring 341, a top block 342 and a first top screw 343, one end of the spring 341 abuts against the shaft core 31, and the other end abuts on the top block 342, the first top screw 343 is screwed into the fixed shaft sleeve 33, and the end of the first top screw 343 away from the adjustment end abuts against the top block 342, and the spring 341 provides an elastic force for the shaft core 31 during the opening and closing process of the buffer hinge; to be precise, when the buffer hinge is opened, the shaft core 31 moves toward the direction of the spring 341, at which time the spring 341 gradually compresses the stored energy, and when the buffer hinge is closed, the spring 341 releases the stored energy and acts on the shaft core 31, driving the shaft core 31 to move linearly, thereby allowing the buffer hinge to automatically close the door; it should be understood that the relative position of the top block 342 can be adjusted by twisting the first top screw 343, thereby adjusting the elastic compression force of the spring 341 in the closed door state, so that the first top screw 343 can achieve the function of adjusting the closing speed.

[0025] The damping mechanism includes a damper 351 and a second top screw 352, the protruding end of the damper 351 abuts against the shaft core 31, the second top screw 352 is screwed into the lower end cover 40, and the end of the second top screw away from the adjustment end abuts against the cylinder end of the damper 351; to be precise, when the buffer hinge is closed, the spring 341 drives the shaft core 31 to move linearly, and the damper 351 provides a buffering force for the shaft core 31 to offset part of the elastic force of the spring 341 to prevent the door body from being damaged due to excessive closing speed; it should be understood that the relative position of the damper 351 can be adjusted by twisting the second top screw 352, thereby adjusting the buffering point of the damper 351 during the door closing process to prevent the door body from being unable to close due to premature buffering and losing the buffering effect due to delayed buffering.

[0026] Specifically, the core shaft 30 also includes a first limit pin 36 and a second limit pin 37. A first semicircular groove 121 is provided on the inner wall surface of the lower sleeve 120 along the length direction, a second semicircular groove 211 is provided on the inner wall surface of the middle sleeve 210 along the length direction, a third semicircular groove 311 is provided on the outer wall surface of the shaft core 31 along the length direction, and a fourth semicircular groove 322 is provided on the outer wall surface of the transmission sleeve 32 along the length direction. The first limit pin 36 is adapted to be connected with the second semicircular groove 211 and the third semicircular groove 311, and the second limit pin 37 is adapted to be connected with the first semicircular groove 211 and the third semicircular groove 311. The circular groove 121 and the fourth semicircular groove 322 are adaptively connected; it should be understood that the first limit pin 36 is adapted to the second semicircular groove 211 and the third semicircular groove 311, and the second limit pin 37 is adapted to the first semicircular groove 121 and the fourth semicircular groove 322. This structure does not require positioning and installation relative to the friction connection of the spline pattern, and the cylindrical first limit pin 36 and the second limit pin 37 can not only achieve the function of limiting transmission, but also have less friction during installation, which makes it easier for workers to install, thereby speeding up production efficiency.

[0027] Among them, in the preferred implementation, two of the first semicircular groove 121, the second semicircular groove 211, the third semicircular groove 311 and the fourth semicircular groove 322 are each provided, and all are arranged in a symmetrical structure. To be precise, two first semicircular grooves 121 are symmetrically arranged on the inner wall surface of the lower sleeve 120, two second semicircular grooves 211 are symmetrically arranged on the inner wall surface of the middle sleeve 210, two third semicircular grooves 311 are symmetrically arranged on the outer wall surface of the shaft core 31, and two fourth semicircular grooves 322 are symmetrically arranged on the outer wall surface of the transmission sleeve 32. It should be understood that two first limit pins 36 and second limit pins 37 are symmetrically connected to make the connection structure more secure, thereby ensuring the connection stability between the shaft core 31 and the middle sleeve 210, and between the transmission sleeve 32 and the lower sleeve 120.

[0028] Specifically, a first sliding bearing 50 is arranged between the upper sleeve 110 and the middle sleeve 210, and a second sliding bearing 60 is arranged between the lower sleeve 120 and the middle sleeve 210. The first sliding bearing 50 and the second sliding bearing 60 are both sleeved on the core shaft 30 to prevent noise caused by friction between the middle sleeve 210 and the upper sleeve 110 and the lower sleeve 120.

[0029] 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 self-closing door buffer hinge, comprising a first hinge piece (10) and a second hinge piece (20) which can coaxially rotate relative to each other, wherein the upper and lower ends of one side of the first hinge piece (10) are respectively provided with an upper sleeve (110) and a lower sleeve (120), and the middle part of one side of the second hinge piece (20) is provided with a middle sleeve (210), wherein the upper sleeve (110), the lower sleeve (120) and the middle sleeve (210) are sleeved in a core shaft (30), wherein the core shaft (30) at least comprises a shaft core (31), a transmission shaft sleeve (32), an elastic mechanism (34), and a damping mechanism (35), wherein the shaft core (31) is provided with a sliding pin ( 38), a spiral groove (321) is arranged on one end wall of the transmission sleeve (32), both ends of the sliding pin (38) extend into the spiral groove (321), and the sliding pin (38) slides along the spiral groove (321), so that when the transmission sleeve (32) rotates, the shaft core (31) is driven to move linearly, and the elastic mechanism (34) and the damping mechanism (35) act on both ends of the shaft core (31) respectively, so that the elastic mechanism (34) provides an elastic force for the shaft core (31) during the opening and closing process of the buffer hinge, and the damping mechanism (35) provides a buffering force for the shaft core (31) during the closing process of the buffer hinge, and the characteristic is that: It also includes a first limit pin (36) and a second limit pin (37); a first semicircular groove (121) is arranged on the inner wall surface of the lower sleeve (120) along the length direction; a second semicircular groove (211) is arranged on the inner wall surface of the middle sleeve (210) along the length direction; a third semicircular groove (311) is arranged on the outer wall surface of the shaft core (31) along the length direction; a fourth semicircular groove (322) is arranged on the outer wall surface of the transmission shaft sleeve (32) along the length direction; the first limit pin (36) is adaptively connected to the second semicircular groove (211) and the third semicircular groove (311); the second limit pin (37) is adaptively connected to the first semicircular groove (121) and the fourth semicircular groove (322).

2. A self-closing door buffer hinge according to claim 1, characterized in that: The first semicircular groove (121), the second semicircular groove (211), the third semicircular groove (311), and the fourth semicircular groove (322) are each provided with two, and are all provided in a symmetrical structure.

3. The self-closing door buffer hinge according to claim 1, characterized in that: It also includes a fixed sleeve (33), which is fixed in the upper sleeve (110) through an external thread, and an upper end cover (331) is provided at the end of the fixed sleeve (33).

4. The self-closing door buffer hinge according to claim 1, characterized in that: The elastic mechanism (34) comprises a spring (341), a top block (342) and a first top screw (343); one end of the spring (341) abuts against the shaft core (31), and the other end abuts against the top block (342); the first top screw (343) is screwed into the fixed shaft sleeve (33), and the end of the first top screw (343) away from the adjustment end abuts against the top block (342).

5. The self-closing door buffer hinge according to claim 1, characterized in that: A lower end cover (40) is provided at the bottom of the lower sleeve (120), and the damping mechanism (35) includes a damper (351) and a second top screw (352), the protruding end of the damper (351) abuts against the shaft core (31), the second top screw (352) is screwed into the lower end cover (40), and the end of the second top screw (352) away from the adjustment end abuts against the cylinder end of the damper (351).

6. The self-closing door buffer hinge according to claim 1, characterized in that: A first sliding bearing (50) is arranged between the upper sleeve (110) and the middle sleeve (210), and a second sliding bearing (60) is arranged between the lower sleeve (120) and the middle sleeve (210). Both the first sliding bearing (50) and the second sliding bearing (60) are sleeved on the core shaft (30).

Images