Buffer door hinge structure

Abstract

The utility model discloses a buffering door hinge structure which comprises a first hinge, a second hinge and a buffering mechanism, the buffering mechanism provides buffering for rotation between the first hinge and the second hinge, the buffering mechanism comprises a sleeve, a damper, a transmission shaft and a compression spring, the damper, the transmission shaft and the compression spring are sequentially arranged in the sleeve, and spiral grooves are symmetrically formed in the sleeve along the center. Mounting blocks are symmetrically arranged on the inner wall face of the middle sleeve along the axis, a mounting cavity is formed between the two mounting blocks, a rotating cover is embedded in the mounting cavity, a linear groove is formed in the rotating cover, a transmission pin is arranged on the transmission shaft in a penetrating mode in the radial direction, and the transmission pin is in sliding fit with the spiral groove and the linear groove so that the transmission pin can drive the transmission shaft to do linear motion during spiral motion. The spring releases compressed stored energy to drive the transmission shaft to move linearly, and the damper counteracts potential energy of the compressed spring for the transmission shaft to achieve buffering. According to the structure, the production requirements of parts are low, the assembly structure is simple, the production and assembly cost is lower than that of a traditional buffer door hinge, and enterprise development is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of hardware fittings, in particular to a buffer door hinge structure. Background Technique

[0002] Hinges are widely used as hinge parts for building doors and windows, and all traditional folding hinges are adopted, which only have a hinge function. During the door closing process, if relying on the inertia of the door itself, it is impossible to close the door. Usually, the user needs to push one side of the door forcefully towards the door frame. This way of closing the door easily causes excessive force, resulting in a too loud collision sound between the door and the door frame or a 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. However, currently, the hydraulic buffer hinges generally have an internal oil circuit. The internal oil circuit reset component of the hydraulic buffer hinge and the components of the hydraulic buffer mechanism (30) are all arranged in the same cavity. During use, foreign objects generated by the movement and wear of the reset component are likely to block the oil circuit of the hydraulic buffer, resulting in easy damage to the product. Moreover, the complex internal structure of the product leads to a relatively large product volume, making it difficult to coordinate with the door leaf.

[0003] The applicant applied for a buffer hinge mandrel with a publication number of CN220687060U on July 31, 2023. By arranging a drive shaft sleeve, a shaft core, a spiral sleeve, a spring and a damper in a sleeve, under the meshing action of the drive shaft sleeve and the spiral sleeve, it makes a spiral lifting movement. When opening the door, the drive shaft sleeve makes an axial movement to push the spring to compress and store energy, and when closing the door, the spring releases the compressed stored energy and reacts to push the drive shaft sleeve to make an axial movement. The damper offsets part of the potential energy of the spring for the drive shaft sleeve, and the drive shaft sleeve slowly moves axially, enabling the buffer mandrel to achieve a buffer function; although this structure greatly reduces the overall product volume compared with the traditional hydraulic oil circuit buffer hinge, the shaft core in this structure needs to process the internal thread teeth of the spiral sleeve and the external thread teeth of the spiral part to realize the conversion of rotation into linear motion. The thread tooth structure is not only complex to process, but also generates a large amount of iron filings after the thread teeth rub against each other during the long-term use of the hinge, which cannot ensure the smooth rotation of the hinge, resulting in affecting the normal use of the hinge.

[0004] Therefore, further improvement is needed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a buffer door hinge structure to solve the problems put forward in the above background technique.

[0006] To achieve the above object, the present utility model provides the following technical solution: A buffer door hinge structure, comprising a first hinge, a second hinge and a buffer mechanism. An upper sleeve and a lower sleeve are provided on the side of the first hinge. A middle sleeve is provided on the side of the second hinge. The middle sleeve is rotatably arranged between the upper sleeve and the lower sleeve. One rotating end of the buffer mechanism is connected to the middle sleeve, and the other rotating end is connected to the upper sleeve or the lower sleeve, so that the buffer mechanism provides buffering when the first hinge and the second hinge rotate. It is characterized in that: The buffer mechanism includes a sleeve and a damper, a transmission shaft and a compression spring sequentially arranged in the sleeve. The sleeve is connected to the upper sleeve or the lower sleeve. Spiral grooves are symmetrically arranged along the center of the sleeve. Installation blocks are symmetrically arranged along the axis on the inner wall surface of the middle sleeve, so that an installation cavity is formed between the two installation blocks. A rotating cover is embedded in the installation cavity. A linear groove is provided on the rotating cover. A transmission pin is radially arranged on the transmission shaft. The transmission pin is slidably matched with the spiral groove and the linear groove, so that the transmission pin drives the transmission shaft to move linearly when spirally moving. The damper and the compression spring respectively act on both ends of the transmission shaft.

[0007] Preferably, the sleeve at least includes a sleeve one. The sleeve one includes a connecting portion and a rotating portion. The connecting portion is connected to the upper sleeve or the lower sleeve. The spiral groove is provided on the rotating portion, so that the rotating cover is rotatably arranged on the rotating portion.

[0008] Preferably, the sleeve further includes a sleeve two. The sleeve two is inserted into one end of the rotating portion away from the connecting portion, and the sleeve two is rotatably matched with the upper sleeve or the lower sleeve. The diameters of the sleeve two and the connecting portion are larger than the diameter of the rotating portion, so that the rotating cover rotates within the area of the rotating portion.

[0009] Preferably, sliding bearings are provided at both ends of the rotating cover. The sliding bearings are sleeved on the rotating portion.

[0010] Preferably, a connecting sleeve is provided on the connecting portion. Positioning convex strips one are symmetrically arranged along the axis on the inner wall surface of the connecting sleeve. Positioning convex strips two are symmetrically arranged along the axis on the outer wall surface. Positioning grooves one are symmetrically arranged along the axis on the connecting portion. The positioning convex strips one are adapted to the positioning grooves one. Positioning grooves two are symmetrically arranged along the axis on the inner wall surfaces of the upper sleeve and the lower sleeve. The positioning convex strips two are adapted to the positioning grooves two.

[0011] Preferably, the cross-sections of the positioning convex strips one, the positioning convex strips two, the positioning grooves one and the positioning grooves two are semi-circular.

[0012] Preferably, the damper is arranged in the sleeve one. An end cover one is provided at the end of the sleeve one. An adjusting screw one is screwed at the center of the end cover one, and the adjusting screw one abuts against the damper.

[0013] Preferably, the compression spring is arranged inside the second sleeve. An end cover two is arranged at the end of the second sleeve. An adjusting screw two is screwed at the center of the end cover two. A pressing member is arranged between the adjusting screw two and the compression spring. The pressing member abuts against the adjusting screw two and the compression spring respectively.

[0014] Preferably, a plastic gasket is arranged between the upper sleeve / lower sleeve and the middle sleeve. The plastic gasket is sleeved on the sleeve.

[0015] Compared with the prior art, the beneficial effects of the present utility model include: by connecting the sleeve with the upper sleeve or the lower sleeve, a damper, a transmission shaft and a compression spring are arranged inside the sleeve. When the second hinge / middle sleeve rotates and opens or closes, the transmission pin makes a spiral movement driven by the rotating cover. When opening the door, the transmission shaft makes a linear movement driven by the transmission pin, and the compression spring compresses to store energy. When closing the door, the spring releases the compressed energy to drive the transmission shaft to make a linear movement. At this time, the damper offsets part of the potential energy of the compression spring for the transmission shaft, so that the transmission shaft slowly moves linearly, thus realizing the buffering function. This kind of structure not only has low requirements for the production of parts, but also has a simpler assembly structure. The production and assembly costs are lower than those of traditional buffer door hinges, which is beneficial to the development of enterprises. Description of the Drawings

[0016] Figure 1 It is a three-dimensional structure schematic diagram of the present utility model.

[0017] Figure 2 It is an installation schematic diagram of the present utility model.

[0018] Figure 3 It is an explosion schematic diagram of the present utility model.

[0019] Figure 4 It is a connection schematic diagram of the second hinge and the rotating cover in the present utility model.

[0020] Figure 5 It is an installation schematic diagram of the second hinge and the rotating cover in the present utility model.

[0021] Figure 6 It is an installation schematic diagram of another embodiment in the present utility model.

[0022] In the figure: first hinge 10, upper sleeve 101, lower sleeve 102, second positioning groove 103, second hinge 20, middle sleeve 201, mounting block 202, mounting cavity 203, buffer mechanism 30, sleeve 31, first sleeve 31a, second sleeve 31b, spiral groove 311, connecting portion 312, rotating portion 313, first positioning groove 314, rotating cover 32, linear groove 321, damper 33, transmission shaft 34, compression spring 35, transmission pin 36, sliding bearing 37, connecting sleeve 38, first positioning rib 381, second positioning rib 382, pressing member 39, first end cover 40, first adjusting screw 50, second end cover 60, second adjusting screw 70, plastic gasket 80. Detailed implementation mode

[0023] Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not used to limit the protection scope of the present invention.

[0024] It should be understood that the various steps recorded in the method implementation mode of the present invention can be executed in different orders and / or executed in parallel. In addition, the method implementation mode may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this regard.

[0025] The term "including" and its variants used herein are open-ended, that is, "including but not limited to". The term "connection" can be a direct connection or an indirect connection through an intermediate component (element). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0026] It should be noted that the concepts such as "first" and "second" mentioned in the present invention are only used to distinguish devices, modules or units, and are not used to limit that these devices, modules or units must be different devices, modules or units, nor are they used to limit the order of functions executed by these devices, modules or units or their interdependent relationships.

[0027] As Figures 1 to 5A buffer hinge structure shown includes a first hinge 10, a second hinge 20 and a buffer mechanism 30. An upper sleeve 101 and a lower sleeve 102 are arranged on the side of the first hinge 10. A middle sleeve 201 is arranged on the side of the second hinge 20. The middle sleeve 201 is rotatably arranged between the upper sleeve 101 and the lower sleeve 102. One rotating end of the buffer mechanism 30 is connected to the middle sleeve 201, and the other rotating end is connected to the upper sleeve 101 or the lower sleeve 102, so that the buffer mechanism 30 provides buffering when the first hinge 10 and the second hinge 20 rotate; wherein mounting holes are provided on the first hinge 10 and the second hinge 20, and the first hinge 10 and the second hinge 20 are respectively mounted on the door frame and the door body through the mounting holes;

[0028] Specifically, the buffer mechanism 30 includes a sleeve 31, and a damper 33, a transmission shaft 34 and a compression spring 35 are sequentially arranged in the sleeve 31. The sleeve 31 is connected to the upper sleeve 101 or the lower sleeve 102. Spiral grooves 311 are symmetrically arranged on the sleeve 31 along the center. Mounting blocks 202 are symmetrically arranged on the inner wall surface of the middle sleeve 201 along the axis, so that an installation cavity 203 is formed between the two mounting blocks 202. A rotating cover 32 is embedded in the installation cavity 203. A straight groove 321 is arranged on the rotating cover 32. A transmission pin 36 is radially penetrated through the transmission shaft 34. The transmission pin 36 is slidably matched with the spiral grooves 311 and the straight groove 321, so that the transmission pin 36 drives the transmission shaft 34 to move linearly when performing spiral motion. The damper 33 and the compression spring 35 respectively act on both ends of the transmission shaft 34; precisely speaking, when the second hinge 20 / middle sleeve 201 opens and closes and rotates, the transmission pin 36 is driven to perform spiral motion through the rotating cover 32. When opening the door, the transmission shaft 34 is driven to move linearly through the transmission pin 36, and compression energy storage is performed through the compression spring 35. When closing the door, the spring 35 releases the compressed energy storage to drive the transmission shaft 34 to move linearly. At this time, the damper 33 offsets part of the potential energy of the compression spring 35 for the transmission shaft 34, so that the transmission shaft 34 slowly moves linearly along a straight line, thereby realizing the buffering function; it should be noted that a rotating cover 32 is arranged on the inner wall surface of the middle sleeve 201, and the connection strength of the middle sleeve 201 is strengthened through the rotating cover 32.

[0029] As Figure 6 shown, in another embodiment, the rotating cover 32 is replaced by an integral rotating sleeve. It is necessary to change the mounting blocks 202 / installation cavity 203 on the inner wall surface of the middle sleeve 201 into semi-circular grooves, and then configure semi-circular ridges on the rotating sleeve, so that the rotating sleeve is installed on the inner wall of the middle sleeve 201.

[0030] The sleeve 31 at least includes a sleeve one 31a. The sleeve one 31a includes a connection portion 312 and a rotating portion 313. The connection portion 312 is connected to the upper sleeve 101 or the lower sleeve 102. Spiral grooves 311 are arranged on the rotating portion 313, so that the rotating cover 32 is rotatably arranged on the rotating portion 313.

[0031] The sleeve 31 further includes a second sleeve 31b which is inserted into one end of the rotating part 313 away from the connecting part 312, and the second sleeve 31b is rotatably engaged with the upper sleeve 101 or the lower sleeve 102. The diameters of the second sleeve 31b and the connecting part 312 are larger than that of the rotating part 313, so that the rotating cover 32 can rotate within the area of the rotating part 313. At the same time, sliding bearings 37 are arranged at both ends of the rotating cover 32, and the sliding bearings 37 are sleeved on the rotating part 313. It should be understood that when the rotating cover 32 rotates on the rotating part 313, the sliding bearings 37 ensure that the rotating cover 32 will not deviate in direction due to vibration, improving the coaxiality. At the same time, the contact stress between the rotating cover 32 and the first sleeve 31a and the second sleeve 31b is reduced, improving the sliding smoothness of the rotating cover 32 and making the hinge rotate more smoothly.

[0032] A connecting sleeve 38 is arranged on the connecting part 312. On the inner wall surface of the connecting sleeve 38, positioning ribs one 381 are symmetrically arranged along the axis, and on the outer wall surface, positioning ribs two 382 are symmetrically arranged along the axis. On the connecting part 312, positioning grooves one 314 are symmetrically arranged along the axis. The positioning ribs one 381 are adapted to the positioning grooves one 314. On the inner wall surfaces of the upper sleeve 101 and the lower sleeve 102, positioning grooves two 103 are symmetrically arranged along the axis. The positioning ribs two 382 are adapted to the positioning grooves two 103. Specifically, the cross-sections of the positioning ribs one 381, the positioning ribs two 382, the positioning grooves one 314 and the positioning grooves two 103 are semicircular.

[0033] Specifically, the damper 33 is arranged in the first sleeve 31a. At the end of the first sleeve 31a, a first end cover 40 is arranged. A regulating screw one 50 is screwed at the center of the first end cover 40, and the regulating screw one 50 abuts against the damper 33. The compression spring 35 is arranged in the second sleeve 31b. At the end of the second sleeve 31b, a second end cover 60 is arranged. A regulating screw two 70 is screwed at the center of the second end cover 60. A pressing member 39 is arranged between the regulating screw two 70 and the compression spring 35, and the pressing member 39 abuts against the regulating screw two 70 and the compression spring 35 respectively. It should be understood that both the regulating screw one 50 and the regulating screw two 70 are hexagon socket set screws with flat ends, which are set screws with a hexagon socket and a flat end at the head end. Specifically, by using a tool to rotate the regulating screw one 50 or the regulating screw two 70, the energy storage size of the hinge when opening the door can be adjusted, thereby adjusting the closing speed of the door and the buffering force according to the closing speed.

[0034] Specifically, a plastic gasket 80 is arranged between the upper sleeve 101 / the lower sleeve 102 and the middle sleeve 201, and the plastic gasket 80 is sleeved on the sleeve 31; to prevent metal friction between the upper sleeve 101 / the lower sleeve 102 and the middle sleeve 201 from generating noise.

[0035] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A buffer hinge structure, comprising a first hinge (10), a second hinge (20) and a buffer mechanism (30). An upper sleeve (101) and a lower sleeve (102) are arranged on the side of the first hinge (10). A middle sleeve (201) is arranged on the side of the second hinge (20). The middle sleeve (201) is rotatably arranged between the upper sleeve (101) and the lower sleeve (102). One rotating end of the buffer mechanism (30) is connected to the middle sleeve (201), and the other rotating end is connected to the upper sleeve (101) or the lower sleeve (102) so that the buffer mechanism (30) provides buffering when the first hinge (10) and the second hinge (20) rotate. It is characterized in that: The buffer mechanism (30) includes a sleeve (31), a damper (33), a transmission shaft (34), and a compression spring (35) that are sequentially arranged inside the sleeve (31). The sleeve (31) is connected to the upper sleeve (101) or the lower sleeve (102). The sleeve (31) is symmetrically provided with spiral grooves (311) along the center. The inner wall surface of the middle sleeve (201) is symmetrically provided with mounting blocks (202) along the axis, so as to form a mounting cavity (203) between the two mounting blocks (202). A rotating cover (32) is embedded in the mounting cavity (203). A linear groove (321) is provided on the rotating cover (32). A transmission pin (36) is radially penetrated through the transmission shaft (34). The transmission pin (36) is in sliding fit with the spiral groove (311) and the linear groove (321), so that the transmission pin (36) drives the transmission shaft (34) to move linearly during spiral movement. The damper (33) and the compression spring (35) respectively act on both ends of the transmission shaft (34).

2. The buffer door hinge structure according to claim 1, wherein: The sleeve (31) at least includes a first sleeve (31a). The first sleeve (31a) includes a connecting portion (312) and a rotating portion (313). The connecting portion (312) is connected to the upper sleeve (101) or the lower sleeve (102). The spiral groove (311) is provided on the rotating portion (313), so that the rotating cover (32) is rotatably arranged on the rotating portion (313).

3. The buffer door hinge structure according to claim 2, characterized in that: The sleeve (31) further includes a second sleeve (31b). The second sleeve (31b) is inserted into one end of the rotating portion (313) away from the connecting portion (312), and the second sleeve (31b) is in rotational fit with the upper sleeve (101) or the lower sleeve (102). The diameters of the second sleeve (31b) and the connecting portion (312) are larger than the diameter of the rotating portion (313), so that the rotating cover (32) rotates within the area of the rotating portion (313).

4. A buffer door hinge structure according to claim 3, characterized in that: Sliding bearings (37) are provided at both ends of the rotating cover (32). The sliding bearings (37) are sleeved on the rotating portion (313).

5. A buffer door hinge structure according to claim 3, characterized in that: A connecting sleeve (38) is provided on the connecting portion (312). The inner wall surface of the connecting sleeve (38) is symmetrically provided with a first positioning rib (381) along the axis, and the outer wall surface is symmetrically provided with a second positioning rib (382) along the axis. The connecting portion (312) is symmetrically provided with a first positioning groove (314) along the axis. The first positioning rib (381) is adapted to the first positioning groove (314). The inner wall surfaces of the upper sleeve (101) and the lower sleeve (102) are symmetrically provided with a second positioning groove (103) along the axis. The second positioning rib (382) is adapted to the second positioning groove (103).

6. The buffer hinge structure according to claim 5, characterized in that: The cross-sections of the first positioning rib (381), the second positioning rib (382), the first positioning groove (314), and the second positioning groove (103) are semi-circular.

7. The buffer hinge structure according to claim 3, characterized in that: The damper (33) is arranged inside the first sleeve (31a). An end cover one (40) is provided at the end of the first sleeve (31a). An adjusting screw one (50) is screwed at the center of the end cover one (40), and the adjusting screw one (50) abuts against the damper (33).

8. A buffer door hinge structure according to claim 3, characterized in that: The compression spring (35) is arranged inside the second sleeve (31b). An end cap two (60) is arranged at the end of the second sleeve (31b). An adjusting screw two (70) is screwed at the center of the end cap two (60). A pressing member (39) is arranged between the adjusting screw two (70) and the compression spring (35). The pressing member (39) is respectively in contact with the adjusting screw two (70) and the compression spring (35).

9. A buffer door hinge structure according to claim 1, characterized in that: A plastic gasket (80) is arranged between the upper sleeve (101) / lower sleeve (102) and the middle sleeve (201). The plastic gasket (80) is sleeved on the sleeve (31).

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