Buffer assembly

Abstract

The utility model belongs to the technical field of hinge accessories, and particularly relates to a buffer assembly. When the buffer assembly is applied to the hinge device, the buffer assembly is rotationally arranged in the first hinge seat of the hinge device, the outer side of the buffer cylinder shell of the buffer assembly is provided with the buffer top block, and the inner side of the first hinge seat is provided with the spiral guide part matched with the spiral guide groove in the outer side of the buffer cylinder shell. In the relative closing process of the first hinge seat, the buffering cylinder shell abuts against the preset position through the buffering ejector block, and through the rotation guiding effect between the spiral guiding part and the spiral guiding groove and the combination of the limited movement of one end of the movable rod, the buffering cylinder shell can move to the preset position through the linkage effect of the buffering ejector block; the piston piece is linearly pushed in a spiral rotating mode to conduct buffering compression and linearly move towards the side opposite to the piston piece, buffering closing of the first hinge base is achieved, and the problems that the buffering function is uneven in speed, clamping stagnation in the buffering process and unsmooth are solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of hinge accessories, specifically relating to a buffer assembly. Background Technology

[0002] In current damping hinge devices, the damper is typically built into the hinge arm, relying on a series of connecting components to establish the linkage between the hinge's four-bar linkage and the damper. When the hinge closes under external force, the motion path of the four-bar linkage must be transmitted to the damper through these connecting components, thereby driving the piston structure inside the damper to move linearly. The piston achieves the damping effect under the damping action of hydraulic oil. However, this damping structure has a significant drawback: its reliance on complex connecting components for motion conversion can lead to deviations or distortions in the transmission of the motion trajectory throughout the closing process. This distortion can cause a series of problems, including unstable damping speed, jerking during damping, a harsh and unsmooth damping experience, and potentially strong impacts on the door panel. Utility Model Content

[0003] The purpose of this invention is to overcome the problems of uneven buffering speed, sluggish buffering process, and lack of smoothness in existing four-bar linkage buffer hinge devices, and to provide a buffer assembly with uniform buffering speed and smooth buffering in hinge devices.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] A buffer assembly includes a buffer cylinder housing, a piston, and a movable rod. The movable rod is connected to the buffer cylinder housing via a hydraulic structure. The piston is located at the inner end of the movable rod. The outer side of the buffer cylinder housing is provided with a helical guide groove arranged along the length direction. The buffer cylinder housing is provided with an outwardly extending buffer top block.

[0006] Compared with the prior art, the buffer assembly of this utility model, when applied to a hinge device, is rotatably mounted in the first hinge seat of the hinge device. The buffer cylinder shell of the buffer assembly is provided with a buffer top block on the outside and a spiral guide part that cooperates with the spiral guide groove on the outside of the buffer cylinder shell on the inside of the first hinge seat. During the relative closing of the first hinge seat, the buffer cylinder shell is abutted at a preset position by the buffer top block and rotated and guided by the spiral guide part and the spiral guide groove. Combined with the restriction of movement at one end of the movable rod, the buffer cylinder shell can be driven linearly by the spiral rotation of the buffer top block to buffer and compress the piston and move linearly to one side relative to the piston, thereby realizing the buffer closing of the first hinge seat. Through the combination of geometric structures, the buffer cylinder shell is cleverly driven to move linearly to one side relative to the movable rod by rotation to achieve the buffering function. The mechanical transmission in the buffering process is simple and direct, avoiding problems such as uneven speed, jamming, and lack of smoothness in the buffering function. The buffering effect is comfortable and gentle, greatly improving the buffering experience of the hinge device and providing good performance.

[0007] Furthermore, the hydraulic structure includes an oil flow channel on the piston and hydraulic oil in the oil chamber of the buffer cylinder housing. The piston divides the oil chamber of the buffer cylinder housing into a first chamber and a second chamber. The piston has an oil flow channel that connects the first chamber and the second chamber respectively. The oil flow channel is used to supply hydraulic oil to flow between the first chamber and the second chamber when the piston moves within the buffer cylinder housing, thereby achieving a buffering effect when the buffer assembly is compressed or extended. With this configuration, the movable rod of the buffer assembly achieves deceleration and buffering through hydraulic flow each time it extends or compresses, resulting in a good buffering and damping effect for the buffer assembly.

[0008] Furthermore, it also includes a return spring, which is located in the first cavity and its two ends abut against the side wall of the first cavity and the piston respectively. It is used to provide an elastic driving force for the movable rod to extend outward and to provide a buffering effect when the movable rod retracts. By setting a return spring, the buffering effect of the movable rod is further improved, as well as the smoothness of the movable rod when resetting.

[0009] Furthermore, the bottom of the buffer top block is provided with several abutment strips arranged side by side along the radial direction of the buffer cylinder shell. The height of the abutment strips away from the outer end of the movable rod is smaller than the height of the other abutment strips. The buffer top block cooperates with the buffer guide surface through several abutment strips. The bottom of the abutment strips is arc-shaped or inclined.

[0010] Furthermore, a locking groove is provided on one side of the spiral guide groove, and a first limiting part is provided on the other side of the spiral guide groove.

[0011] Furthermore, the piston component is provided with a first sealing groove arranged circumferentially, and a first sealing ring is provided in the first sealing groove. The outer periphery of the piston component is sealed with the inner wall of the oil chamber through the first sealing ring. With this arrangement, the hydraulic oil in the oil chamber can be limited to flow between the first chamber and the second chamber through the oil flow channel, ensuring that the piston component achieves a buffering effect when it moves in the oil chamber.

[0012] Furthermore, the cavity inside the buffer cylinder is cylindrical with an open end. The inner end of the cavity is sequentially configured as an oil cavity, a guide cavity, and a sealing cavity. The guide cavity is equipped with a guide structure, and the movable rod is slidably connected to the guide structure. The sealing cavity is equipped with a sealing plug that seals with the movable rod. With this configuration, the guide structure and the movable rod are guided together, which effectively prevents the movable rod from shaking during movement and ensures the axial movement of the movable rod.

[0013] Furthermore, the inner diameter of the sealing cavity is larger than the inner diameter of the guide cavity, and a first step is formed between the sealing cavity and the guide cavity. The inner diameter of the guide cavity is larger than the inner diameter of the oil cavity, and a second step is formed between the guide cavity and the oil cavity. The sealing plug is installed in the sealing cavity and limited on the first step, and the guide structure is installed in the guide cavity and limited between the second step and the sealing plug. By setting the first step and the second step respectively to limit the sealing plug and the guide structure, the sealing plug and the guide structure have a good fixing effect and the product assembly is stable.

[0014] Furthermore, the sealing cavity has a circumferentially arranged limiting protrusion on the side near the opening, and the outer side of the sealing plug is interference-fitted with the limiting protrusion; with this arrangement, the sealing plug and the sealing cavity have a good sealing fit effect, avoiding hydraulic oil leakage.

[0015] Furthermore, the sealing plug includes a sealing seat and an oil seal. The sealing seat has a second sealing groove with a rear opening and an movable hole with a connection between the front side and the second sealing groove. The movable rod is slidably placed in the movable hole, and the oil seal is placed in the second sealing groove to seal against the outside of the movable rod. With this arrangement, the movable rod and the sealing seat are sealed against each other by the oil seal, which effectively prevents hydraulic oil leakage when the movable rod moves relative to each other, resulting in good product reliability.

[0016] Furthermore, the guiding structure includes a guide frame and a guide sleeve disposed on the guide frame, the guide sleeve being sleeved with the movable rod; with this arrangement, the movable rod is guided and engaged within the buffer cylinder housing by the guide sleeve, ensuring the stability and smoothness of the relative movement of the movable rod. Attached Figure Description

[0017] Figure 1 This is a top view of the first hinge seat in the open state relative to the second hinge seat.

[0018] Figure 2 This is a bottom view of the first hinge seat in the open state relative to the second hinge seat.

[0019] Figure 3 This is a top view of the first hinge seat in its closed state relative to the second hinge seat.

[0020] Figure 4 This is a schematic diagram showing the first hinge seat closed relative to the second hinge seat to a preset position.

[0021] Figure 5 This is an exploded view of the second hinge seat.

[0022] Figure 6 This is a sectional view of the first hinge seat, the linkage mechanism, and the second hinge seat.

[0023] Figure 7 Explosion of the first hinge seat Figure 1 .

[0024] Figure 8 Explosion of the first hinge seat Figure 2 .

[0025] Figure 9 This is a cross-sectional view of the buffer assembly.

[0026] Figure 10 Exploded view of the buffer assembly in cross-section

[0027] Figure 11 An exploded view of the buffer assembly with the buffer cylinder shell removed.

[0028] Figure 12 This is a schematic diagram showing the first hinge seat in the unlocked state.

[0029] Figure 13 This is a schematic diagram of the first hinge seat in the locked state.

[0030] Labeling: First hinge seat 1, Second hinge seat 2, Buffer assembly 3, Housing cavity 11, Clearance hole 12, Buffer cylinder shell 31, Movable rod 32, Spiral guide groove 33, Spiral guide part 34, Buffer top block 35, Hinge cup 13, Cover plate 14, First limiting part 331, Second limiting part 341, Piston part 36, Return spring 37, First cavity 311, Second cavity 312, Abutting spoke 38, Linkage structure 4, First connecting rod 41, Second connecting rod 42, Drive torsion spring 43, Cup cavity 131, Locking mechanism 5, Lock groove 51, Locking rod 52, Sliding key 53, Sliding key hole 54, Sliding cavity 55, Positioning block 56, Locking position 551, Unlocking position 552, Hinge arm 21, Adjusting frame 22, Base 23, Fixed seat 24, First adjusting hole 211, ... A connecting hole 212, a second adjusting hole 221, a second connecting hole 222, a first screw 25, a second screw 26, an arc-shaped hole 271, a guide shaft 272, a push bracket 28, a first rotating shaft 281, a first reset torsion spring 291, a second reset torsion spring 292, a mounting base 10, a buffer guide surface 46, a slot 229, a second rotating shaft 295, a bayonet 139, a locking block 149, a touch surface 351, a housing cavity 30, an oil cavity 303, a guide cavity 302, a sealing cavity 301, a sealing plug 39, a first step 304, a second step 305, a limiting protrusion 306, a sealing seat 391, an oil seal 392, a movable hole 393, a guide sleeve 307, a guide frame 308, an oil flow channel 361, a first sealing groove 362, a second sealing groove 394, and a first sealing ring 363. Detailed Implementation

[0031] The specific embodiments of this utility model are described below with reference to the accompanying drawings. In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model.

[0032] Example 1:

[0033] See Figures 1 to 13 The present invention provides a buffer assembly 3, which includes a buffer cylinder shell 31, a piston and a movable rod 32. The movable rod 32 is connected to the buffer cylinder shell 31 by a hydraulic structure. The piston is located at the inner end of the movable rod 32. The buffer cylinder shell 31 has a spiral guide groove 33 arranged along the length direction on the outer side. The buffer cylinder shell 31 has a buffer top block 35 extending outward, and the top of the buffer top block 35 has a touch surface.

[0034] Compared with the prior art, the buffer assembly 3 of this utility model, when applied to a hinge device, is rotatably mounted in the first hinge seat 1 of the hinge device. The buffer cylinder shell 31 of the buffer assembly 3 is provided with a buffer top block 35 on the outside and a spiral guide part 34 that cooperates with the spiral guide groove 33 on the outside of the buffer cylinder shell 31 on the inside of the first hinge seat 1. During the relative closing process of the first hinge seat 1, the buffer cylinder shell 31 abuts against the preset position through the buffer top block 35 and is guided by the rotation between the spiral guide part 34 and the spiral guide groove 33, so that the buffer assembly 3 performs buffer compression, realizing the buffer closure of the first hinge seat 1. Through the combined use of geometric structures, the rotation method is cleverly used to drive the outer buffer cylinder shell 31 of the buffer assembly 3 to move linearly to one side to achieve the buffer function. The mechanical transmission in the buffer process is simple and direct, avoiding problems such as uneven speed, jamming, and lack of smoothness in the buffer function. The buffer effect is comfortable and gentle, greatly improving the buffer experience of the hinge device and the use effect is good.

[0035] See Figure 7 and Figure 8 In one embodiment, the hydraulic structure includes an oil flow channel 361 on the piston and hydraulic oil in an oil chamber 303 in the buffer cylinder housing 31. The piston divides the oil chamber 303 of the buffer cylinder housing 31 into a first chamber 311 and a second chamber 312. The piston is provided with an oil flow channel that connects the first chamber 311 and the second chamber 312 respectively. The oil flow channel is used to supply hydraulic oil to flow between the first chamber 311 and the second chamber 312 when the piston moves in the buffer cylinder housing 31, so as to achieve the buffering effect when the buffer assembly 3 is compressed or extended. With this arrangement, the movable rod 32 of the buffer assembly 3 achieves deceleration and buffering through hydraulic flow each time it extends or is compressed, and the buffer assembly 3 has a good buffering damping effect.

[0036] See Figure 7 and Figure 8 In one embodiment, a return spring 37 is also included. The return spring 37 is disposed in the first cavity 311 and its two ends abut against the side wall of the first cavity 311 and the piston 36, respectively. It is used to provide an elastic driving force for the movable rod 32 to extend outward and to provide a buffering effect when the movable rod 32 retracts. By providing the return spring 37, the buffering effect of the movable rod 32 is further improved, as well as the smoothness of the movable rod 32 when resetting.

[0037] See Figure 7 and Figure 8In one embodiment, the bottom of the buffer top block 35 is provided with a plurality of abutment strips 38 arranged side by side along the radial direction of the buffer cylinder shell 31. The height of the abutment strips 38 farther from the outer end of the movable rod is smaller than the height of the other abutment strips 38. The buffer top block 35 cooperates with the buffer guide surface 46 through the plurality of abutment strips 38. The bottom of the abutment strips 38 is arc-shaped or inclined.

[0038] In one embodiment, a locking groove 51 is provided on one side of the spiral guide groove 33, and a first limiting part 331 is provided on the other side of the spiral guide groove 33.

[0039] See Figures 7 to 11 In one embodiment, the piston 36 is provided with a first sealing groove 362 arranged circumferentially, and a first sealing ring 363 is provided in the first sealing groove 362. The outer periphery of the piston 36 is sealed with the inner wall of the oil chamber 303 through the first sealing ring 363. With this arrangement, the hydraulic oil in the oil chamber 303 is better limited to flow between the first cavity 311 and the second cavity 312 through the oil flow channel 361, so as to ensure that the piston 36 achieves a buffering effect when it moves in the oil chamber 303.

[0040] See Figures 7 to 11 In one embodiment, the cavity 30 inside the buffer cylinder shell 31 is cylindrical with an open end. The inner end of the cavity 30 is sequentially configured with an oil cavity 303, a guide cavity 302, and a sealing cavity 301. The guide cavity 302 is provided with a guide structure, and the movable rod 32 is slidably connected to the guide structure. The sealing cavity 301 is provided with a sealing plug 39 that seals with the movable rod 32. With this configuration, the guide structure and the movable rod 32 are guided and cooperated with each other, which effectively avoids the shaking phenomenon when the movable rod 32 moves and ensures the axial movement effect of the movable rod 32.

[0041] See Figures 7 to 11 In one embodiment, the inner diameter of the sealing cavity 301 is larger than the inner diameter of the guide cavity 302, a first step 304 is formed between the sealing cavity 301 and the guide cavity 302, the inner diameter of the guide cavity 302 is larger than the inner diameter of the oil cavity 303, and a second step 305 is formed between the guide cavity 302 and the oil cavity 303; the sealing plug 39 is installed in the sealing cavity 301 and limited on the first step 304, and the guide structure is installed in the guide cavity 302 and limited between the second step 305 and the sealing plug 39; by setting the first step 304 and the second step 305 respectively to limit the sealing plug 39 and the guide structure, the sealing plug 39 and the guide structure have a good fixing effect and the product assembly is stable.

[0042] See Figures 7 to 11In one embodiment, the sealing cavity 301 is provided with a circumferentially arranged limiting protrusion 306 on the side near the opening, and the outer side of the sealing plug 39 is press-fitted with the limiting protrusion 306; with this arrangement, the sealing plug 39 and the sealing cavity 301 have a good sealing fit effect, and hydraulic oil leakage is avoided.

[0043] See Figures 7 to 11 In one embodiment, the sealing plug 39 includes a sealing seat 391 and an oil seal 392. The sealing seat 391 has a second sealing groove 394 with a rear opening and an active hole 393 that connects the front side and the second sealing groove 394. The active rod 32 is slidably placed in the active hole 393, and the oil seal 392 is placed in the second sealing groove 394 to seal and cooperate with the outside of the active rod 32. With this arrangement, the active rod 32 and the sealing seat 391 are sealed and cooperated with by the oil seal 392, which effectively avoids hydraulic oil leakage when the active rod 32 moves relative to each other, and the product has good reliability.

[0044] See Figures 7 to 11 In one embodiment, the guiding structure includes a guide frame 308 and a guide sleeve 307 disposed on the guide frame 308, wherein the guide sleeve 307 is sleeved with the movable rod 32; with this arrangement, the movable rod 32 is guided and engaged within the buffer cylinder housing 31 by the guide sleeve 307, ensuring the stability and smoothness of the relative movement of the movable rod 32.

[0045] Example 2:

[0046] See Figures 1 to 13 The main purpose of this embodiment is to provide a damping buffer mechanism for the buffer assembly 3 of the first embodiment, including a first hinge seat 1, a buffer assembly 3, and a linkage mechanism. The first hinge seat 1 has a cylindrical mounting cavity 11 located on the inner side. The buffer assembly 3 is mounted in the mounting cavity 11. The mounting cavity 11 has a clearance hole 12 communicating with the outer side. The buffer top block 35 extends out of the outer side of the first hinge seat 1 through the clearance hole 12. The two ends of the buffer assembly 3 abut against the two end side walls of the mounting cavity 11. The first hinge seat 1 has a spiral guide part 34 that cooperates with the spiral guide groove 33. The linkage structure 4 is drivenly connected to one end of the first hinge seat 1 and is used to support the relative opening or closing of the first hinge seat 1. During the relative closing process of the first hinge seat 1, the buffer cylinder shell 31 abuts against the preset position through the buffer top block 35 and is axially translated by the rotational guidance between the spiral guide part 34 and the spiral guide groove 33, so that the buffer cylinder shell 31 and the piston 36 are buffered and compressed, thereby the first hinge seat 1 forms a buffered closure.

[0047] Compared with the prior art, the damping buffer mechanism of this utility model, applied in a hinge device, has a buffer assembly 3 rotatably mounted inside the first hinge seat 1. The buffer cylinder shell 31 of the buffer assembly 3 has a buffer top block 35 on its outer side and a spiral guide part 34 that cooperates with the spiral guide groove 33 on the outer side of the buffer cylinder shell 31 on the inner side of the first hinge seat 1. During the relative closing of the first hinge seat 1, the buffer cylinder shell 31 abuts against the preset position through the buffer top block 35 and is guided by the rotation between the spiral guide part 34 and the spiral guide groove 33, so that the buffer assembly 3 performs buffer compression, realizing the buffer closure of the first hinge seat 1. Through the combined use of geometric structures, the rotation method is cleverly used to drive the outer buffer cylinder shell 31 of the buffer assembly 3 to move linearly to one side to achieve the buffering function. The mechanical transmission in the buffering process is simple and direct, avoiding problems such as uneven speed, jamming, and lack of smoothness in the buffering function. The buffering effect is comfortable and gentle, greatly improving the buffering experience of the hinge device and having a good use effect.

[0048] See Figures 6 to 9 , Figure 12 and Figure 13 In one embodiment, a first limiting part 331 is provided on the inner side of the spiral guide groove 33, and a second limiting part 341 is provided on the side of the spiral guide part 34. When the first hinge seat 1 is opened to a preset position, the first limiting part 331 and the second limiting part 341 are engaged in a limiting cooperation. With this setting, after the first hinge seat 1 is opened to the maximum angle, the first hinge seat 1 is prevented from being over-opened relative to the second hinge seat 2, which could damage the linkage mechanism and ensure the reliability of the product.

[0049] See Figures 6 to 9 , Figure 12 and Figure 13 In one embodiment, the first hinge seat 1 includes a hinge cup 13 and a cover plate 14. The bottom of the mounting cavity 11 is open and disposed on the cover plate 14. The spiral guide part 34 is located on the hinge cup 13. The hinge cup 13 is used to cover the opening of the mounting cavity 11. The spiral guide part 34 is disposed relative to the mounting cavity 11. With this arrangement, the buffer assembly 3 is fixed by the hinge cup 13 after being assembled in the mounting cavity 11, and the assembly and connection method is simple.

[0050] See Figure 7 and Figure 8 In one embodiment, the hinge cup 13 is provided with a latch 139 on its edge and inner side, and the cover plate 1414 is provided with a latch block 149 corresponding to each latch 139. The latch block 149 is engaged in the latch 139 to realize the detachable assembly of the cover plate 14 and the hinge cup 13.

[0051] See Figures 6 to 9 , Figure 12 and Figure 13In one embodiment, a locking mechanism 5 is also included, which is used to lock the compressed state of the buffer assembly 3 so that the buffer closing function of the buffer assembly 3 is turned off when the first hinge seat 1 is relatively closed. With this setting, by setting the locking mechanism 5, the user can set whether the cup damping hinge has a buffer damping effect during the closing process according to the usage requirements.

[0052] See Figures 7 to 9 , Figure 12 and Figure 13 In one embodiment, a locking groove 51 is provided on the outer side of the buffer cylinder shell 31, and the locking mechanism 5 includes a locking rod 52 slidably disposed on the first hinge seat 1. When the first hinge seat 1 is closed in place, the locking groove 51 rotates with the buffer cylinder shell 31 to one end of the locking rod 52. By manipulating the locking rod 52 to insert into or disengage from the locking groove 51, the buffer closing function of the buffer assembly 3 can be closed or opened. With this configuration, the operation mode of opening or closing the buffer closing function of the buffer assembly 3 is convenient for users.

[0053] See Figures 6 to 9 , Figure 12 and Figure 13 In one embodiment, the locking rod 52 is arranged radially along the buffer cylinder housing 31, and the locking groove 51 opens radially along the buffer cylinder housing 31, located within the spiral guide groove 33 of the buffer cylinder housing 31. The first hinge seat 1 is provided with a sliding key hole 54 corresponding to the locking rod 52, and the side of the locking rod 52 is provided with a sliding key 53 extending out of the sliding key hole 54. By pushing the sliding key 53, the relative position of the locking rod 52 can be controlled. With this arrangement, when the locking rod 52 is operated, the buffer closing function of the buffer assembly 3 can be quickly opened or closed.

[0054] See Figures 6 to 9 , Figure 12 and Figure 13In one embodiment, the first hinge seat 1 has a sliding cavity 55 for accommodating the locking rod 52. The sliding cavity 55 opens near the side of the buffer cylinder housing 31. The locking rod 52 is slidably disposed within the sliding cavity 55. A positioning block 56 is provided on the side of the locking rod 52. A locking position 551 and an unlocking position 552 are arranged adjacent to each other on the side of the sliding cavity 55. When the locking rod 52 slides to the point where the positioning block 56 engages with the locking position 551, the buffering function of the buffer assembly 3 is closed. When the positioning block 56 engages with the unlocking slot 552, the buffer function of the buffer assembly 3 is activated. By setting the locking slot 551 and the unlocking slot 552 to position the relative position of the locking rod 52, the displacement of the locking rod 52 is effectively prevented from affecting the locking of the buffer assembly 3. When the locking rod 52 slides to the locking slot 551, the positioning action of the locking slot 551 can prevent the locking rod 52 from sliding out automatically, thus preventing the buffer function from failing.

[0055] See Figures 6 to 9 , Figure 12 and Figure 13 In one embodiment, the top of the buffer block 35 is provided with a touch surface 351, and the bottom of the buffer block 35 is provided with a plurality of abutment strips 38 arranged side by side along the radial direction of the buffer cylinder shell 31. The buffer block 35 cooperates with the buffer guide surface 46 through the plurality of abutment strips 38. The bottom of the abutment strips 38 is arc-shaped or inclined. With this setting, it is convenient for the user to manually pry the buffer block 35 to the buffer push rod in a compressed state, that is, after prying the buffer assembly 3 to the maximum angle, pull the locking rod 52 into the locking groove 51 of the buffer push rod to lock the buffer assembly 3 and prevent it from automatically resetting. This ensures that the buffer block 35 and the second hinge seat 2 never come into contact during the closing process of the hinge, thereby turning off the buffer closing function of the buffer push rod and realizing the hinge without buffering function.

[0056] See Figures 6 to 9 , Figure 12 and Figure 13 In one embodiment, the sliding cavity 55 has an opening on its upper side and is disposed on the hinge cup 13. The cover plate 14 is used to cover part of the opening of the sliding cavity 55. The sliding key hole 54 is disposed on the cover plate 14 and is disposed corresponding to the sliding cavity 55. With this arrangement, the first hinge seat 1 is simple to set. After the buffer assembly 3 and the locking rod 52 are placed on the base 23, they are covered and fixed by the cover plate 14.

[0057] See Figures 6 to 9 , Figure 12 and Figure 13In one embodiment, the hinge cup 13 has a cup cavity 131 on one side. When the first hinge seat 1 is closed in place, the connecting rod structure 4 is housed in the cup cavity 131. With this arrangement, when the damping hinge inside the cup is closed, the overall structure is smaller and more compact.

[0058] See Figures 6 to 9 , Figure 12 and Figure 13 In one embodiment, the clearance hole 12 is located on the side of the cover plate 14 corresponding to the cup cavity 131, and the first hinge seat 1 is provided with mounting seats 10 on both sides of the clearance hole 12. The mounting seats 10 are provided on the hinge cup 13, and the sliding key hole 54 is provided on the mounting seat 10 on one side. With this arrangement, the cover plate 14 has a simple and compact structure design, and the buffer top block 35 has a good clearance effect.

[0059] See Figures 1 to 9 , Figure 12 and Figure 13 In one embodiment, when the first hinge seat 1 and the connecting rod structure 4 are applied to the hinge device, a second hinge seat 2 is also provided. The first hinge seat 1 is movably connected to the second hinge seat 2 through the connecting rod structure 4. The first hinge seat 1 and the second hinge seat 2 can be closed or opened relative to each other through the action of the connecting rod structure 4. The preset position is a buffer guide surface 46 provided on the second hinge seat 2. During the relative closing process of the first hinge seat 1 and the second hinge seat 2, the buffer cylinder shell 31 abuts against the buffer guide surface 46 through the buffer top block 35 and is guided by the rotation of the spiral guide structure, so that the buffer cylinder shell 31 rotates and translates relative to the buffer assembly 3 to perform buffer compression, thereby forming a buffer closure between the first hinge seat 1 and the second hinge seat 2.

[0060] See Figures 1 to 6 In one embodiment, the linkage structure 4 includes a first link 41 and a second link 42. The two ends of the first link 41 are rotatably connected to the first hinge seat 1 and the second hinge seat 2, respectively. The two ends of the second link 42 are rotatably connected to the first hinge seat 1 and the second hinge seat 2, respectively. The first hinge seat 1, the first link 41, the second hinge seat 2, and the second link 42 constitute a four-bar linkage. It also includes a drive torsion spring 43, which is rotatably connected to the second hinge seat 2. The two spring arms of the drive torsion spring 43 abut against the second hinge seat 2 and the second link 42, respectively. The drive torsion spring 43 provides an elastic driving force to the first hinge seat 1 and the second hinge seat 2 in a relatively closed direction. With this configuration, the linkage structure 4 is simple to set up, and the drive torsion spring 43 has a good driving effect.

[0061] See Figures 1 to 6In one embodiment, the second hinge seat 2 includes a hinge arm 21, an adjusting frame 22, and a base 23. The base 23 has outwardly extending fixing seats 24 on both sides for assembly and connection with the cabinet. The base 23 is installed inside the adjusting frame 22, which is installed inside the hinge arm 21. The hinge arm 21 is connected to the connecting rod structure 4. The adjusting frame 22 is connected to the inner side of the hinge arm 21 via an adjusting structure. The base 23 and the adjusting frame 22 are slidably connected via a guide structure. An elastic reset structure is provided between the base 23 and the adjusting frame 22. This elastic reset structure provides an elastic driving force to the base 23 towards the first hinge seat 1. This arrangement allows for adaptive adjustments such as displacement between the adjusting frame 22 and the base 23 when the first hinge seat 1 and the second hinge seat 2 are relatively closed, preventing jamming at the connection between the second hinge seat 2 and the cabinet and ensuring smooth opening and closing of the cup-shaped damping hinge.

[0062] See Figures 1 to 6 In one embodiment, the adjustment structure includes a first adjustment hole 211 and a first connecting hole 212 located on the top of the hinge arm 21, a second adjustment hole 221 and a second connecting hole 222 located on the top of the adjustment frame 22, and a first screw 25 and a second screw 26. The first screw 25 passes through the first adjustment hole 211 and connects to the second connecting hole 222, and the second screw 26 passes through the second adjustment hole 221 and connects to the first connecting hole 212. With this configuration, the overall length of the second hinge seat 2 can be shortened or lengthened as needed, facilitating product assembly and fixation.

[0063] See Figure 5 and Figure 6 In one embodiment, the guide structure includes an arc-shaped hole 271 at the front end of the adjustment frame 22 and a guide shaft 272 at the base 23. The guide shaft 272 is movably placed within the arc-shaped hole 271. A pusher 28 is provided at the rear side of the base 23. The pusher 28 is rotatably connected to the rear end of the adjustment frame 22 via a first rotating shaft 281. With this arrangement, the adaptive position adjustment between the adjustment frame 22 and the base 23 is limited within the preset trajectory of the arc-shaped hole 271, and the relative movement between the adjustment frame 22 and the base 23 is smooth.

[0064] See Figure 5 and Figure 6In one embodiment, the elastic reset structure includes a first reset torsion spring 291 and a second reset torsion spring 292. The first reset torsion spring 291 is rotatably connected to the adjusting frame 22 via a second rotating shaft 295. One end of the first reset torsion spring 291 is engaged in a slot 229 on the inner top wall of the adjusting frame 22, and the other end abuts against the guide shaft 272. One end of the second reset torsion spring 292 abuts against the rear end of the adjusting frame 22, and the other end abuts against the pusher frame 28. With this configuration, the elastic reset structure is simple to set up, and the elastic reset effect of the drive base 23 is good.

[0065] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A buffer assembly, characterized in that, It includes a buffer cylinder shell, a piston, and a movable rod. The movable rod is connected to the buffer cylinder shell by a hydraulic structure. The piston is located at the inner end of the movable rod. The outer side of the buffer cylinder shell is provided with a spiral guide groove arranged along the length direction. The buffer cylinder shell is provided with a buffer top block extending outward.

2. The buffer assembly according to claim 1, characterized in that, The hydraulic structure includes an oil flow channel on the piston and a hydraulic oil chamber in the buffer cylinder housing. The piston divides the hydraulic chamber in the buffer cylinder housing into a first chamber and a second chamber. The piston is provided with an oil flow channel that connects the first chamber and the second chamber respectively. The oil flow channel is used to supply hydraulic oil to flow between the first chamber and the second chamber when the piston moves in the buffer cylinder housing, so as to achieve the buffering effect when the buffer assembly is compressed or extended.

3. The buffer assembly according to claim 2, characterized in that, It also includes a return spring, which is located in the first cavity and its two ends abut against the side wall of the first cavity and the piston respectively. The return spring is used to provide an elastic driving force for the movable rod to extend outward and to provide a buffering effect when the movable rod retracts.

4. The buffer assembly according to claim 1, characterized in that, The bottom of the buffer top block is provided with several abutment strips arranged side by side along the radial direction of the buffer cylinder shell. The height of the abutment strips away from the outer end of the movable rod is smaller than the height of the other abutment strips. The buffer top block cooperates with the buffer guide surface through several abutment strips. The bottom of the abutment strips is arc-shaped or inclined.

5. The buffer assembly according to claim 1, characterized in that, A locking groove is provided on one side of the spiral guide groove, and a first limiting part is provided on the other side of the spiral guide groove.

6. The buffer assembly according to claim 2, characterized in that, The piston component is provided with a first sealing groove arranged circumferentially, and a first sealing ring is provided in the first sealing groove. The outer periphery of the piston component is sealed with the inner wall of the oil chamber through the first sealing ring. The cavity inside the buffer cylinder shell is cylindrical and open at one end. The inner end of the cavity is sequentially configured as the oil cavity, the guide cavity, and the sealing cavity from the outside. The guide cavity is provided with a guide structure, and the movable rod is slidably connected to the guide structure. The sealed cavity is equipped with a sealing plug that seals with the movable rod.

7. The buffer assembly according to claim 6, characterized in that, The inner diameter of the sealing cavity is larger than the inner diameter of the guide cavity, and a first step is formed between the sealing cavity and the guide cavity. The inner diameter of the guide cavity is larger than the inner diameter of the oil cavity, and a second step is formed between the guide cavity and the oil cavity. The sealing plug is installed inside the sealing cavity and is limited on the first step, and the guide structure is installed inside the guide cavity and is limited between the second step and the sealing plug.

8. The buffer assembly according to claim 6 or 7, characterized in that, The sealing cavity has a circumferentially arranged limiting protrusion on the side near the opening, and the outer side of the sealing plug is interference-fitted with the limiting protrusion.

9. The buffer assembly according to claim 6, characterized in that, The sealing plug includes a sealing seat and an oil seal. The sealing seat has a second sealing groove with a rear opening and a movable hole with a connection between the front side and the second sealing groove. The movable rod is slidably placed in the movable hole, and the oil seal is placed in the second sealing groove and seals with the outside of the movable rod.

10. The buffer assembly according to claim 6, characterized in that, The guiding structure includes a guide frame and a guide sleeve disposed on the guide frame, the guide sleeve being sleeved with the movable rod.

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