CN220955180U - Hydraulic buffering hinge - Google Patents

Abstract

The utility model discloses a hydraulic buffer hinge which comprises a first cylinder body, an inner pipe, a sealing assembly, a piston assembly, a rear cover and a pressure regulating bolt, wherein the first cylinder body is provided with a first cavity, and one end of the first cavity is provided with a first port penetrating through the first cylinder body; the inner pipe is arranged in the first cavity, and the side wall of one end far away from the first port is provided with an oil return hole; the sealing assembly is used for sealing one end of the inner tube away from the first port; the piston component is in sliding fit with the inner wall of the inner tube; the rear cover is provided with a first oil hole and a second oil hole, one of the first oil hole and the second oil hole is communicated with the inner side of the inner tube, and the other of the first oil hole and the second oil hole is communicated with the outer side of the inner tube; the pressure regulating bolt has the oil duct that crosses, crosses the oil duct and communicates first oilhole and second oilhole, crosses the one end of oil duct and has the reducing section, reducing section and first oilhole intercommunication, the cross-sectional area of reducing section is less than the cross-sectional area of first oilhole and along the circumference convergent extension of pressure regulating bolt. The hydraulic buffer hinge can improve the efficiency of adjusting the buffer speed.

Description

Hydraulic buffering hinge

Technical Field

The utility model relates to the technical field of hinges, in particular to a hydraulic buffer hinge.

Background

The hydraulic buffer hinge is one kind of hinge and used for connecting a door frame and a door leaf to realize the function of opening and closing the door.

In the related art, the hydraulic buffering hinge can adjust the buffering speed of the hinge by adjusting the size of the oil through hole.

The utility model patent of China with the application number 2023210048478 discloses a hydraulic functional shaft, which comprises an outer shell, a shaft core, a piston, an upper sealing cover and a lower sealing cover which are respectively positioned at two ends of the outer shell, one end of the shaft core is movably inserted into the piston, a space for the shaft core to move axially is arranged in the piston, the outer shell is sleeved on the shaft core, a pushing spring for pushing the piston is arranged between the outer shell and the shaft core, a piston cover is arranged in the piston, a one-way valve and a speed regulating valve hole are arranged on the piston cover, the speed regulating valve hole is communicated with an inner cavity of the piston, the hydraulic functional shaft further comprises a speed regulating oil needle, the speed regulating oil needle comprises a connecting part, a needle rod and a driving part, the needle rod is in variable-diameter arrangement, the needle rod is movably connected into the speed regulating valve hole, the driving part extends out of the lower sealing cover, a driving structure is arranged on the driving part along the circumferential direction of the shaft core, and the driving part is rotated by the driving structure, the speed regulating needle rod is driven to rotate, so that the position of the speed regulating needle rod extends into the speed regulating valve hole, the size of the gap between the needle rod and the speed regulating valve hole, and the hydraulic oil flowing from the speed of the valve hole to the oil storage cavity is regulated, and the speed of the hydraulic oil in the oil is regulated.

However, when the conventional hydraulic buffer hinge is used for adjusting the buffer speed, the rotation driving part can only drive the adjusting oil needle to move by a distance equivalent to the screwing-in or screwing-out of the connecting part, so that the efficiency of adjusting the buffer speed is low.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the hydraulic buffer hinge which can improve the efficiency of adjusting the buffer speed.

According to an embodiment of the first aspect of the utility model, a hydraulic buffer hinge comprises:

a first cylinder having a first cavity, one end of the first cavity having a first port therethrough;

The inner tube is arranged in the first cavity, and the side wall of one end far away from the first port is provided with an oil return hole;

A sealing assembly disposed within the first lumen for sealing an end of the inner tube remote from the first port;

the piston assembly penetrates through the sealing assembly and is in sliding fit with the inner wall of the inner tube;

A rear cover connected with the first port and used for sealing one end of the inner tube away from the sealing assembly, wherein the rear cover is provided with a first oil hole and a second oil hole, one of the first oil hole and the second oil hole is communicated with the inner side of the inner tube, and the other of the first oil hole and the second oil hole is communicated with the outer side of the inner tube;

The pressure regulating bolt is rotationally connected with the rear cover and is provided with an oil passage, the oil passage is communicated with the first oil hole and the second oil hole, one end of the oil passage is provided with a reducing section, the reducing section is communicated with the first oil hole, and the cross section area of the reducing section is smaller than the cross section area of the first oil hole and gradually extends along the circumferential direction of the pressure regulating bolt.

The hydraulic buffer hinge provided by the embodiment of the utility model has at least the following beneficial effects:

1. According to the utility model, the first cylinder body and the inner tube are arranged, the first cylinder body is provided with the first cavity, one end of the first cavity is provided with the first port penetrating through the first cylinder body, the inner tube is arranged in the first cavity, and the side wall of one end of the inner tube, which is far away from the first port, is provided with the oil return hole, so that hydraulic pressure can circularly flow outside the inner tube, the oil return hole and inside the inner tube, and an oil way for hydraulic oil to flow is formed outside the inner tube, the oil return hole and inside the inner tube.

2. According to the utility model, the sealing component is arranged in the first cavity and is used for sealing one end of the inner pipe far away from the first port, so that hydraulic oil is prevented from flowing out of one end of the inner pipe far away from the first port, and the hydraulic oil can flow through the oil through hole.

3. According to the utility model, the piston assembly penetrates through the sealing assembly, and the piston assembly is in sliding fit with the inner wall of the inner pipe, so that when the inner pipe moves back and forth, the piston assembly can drive hydraulic oil to flow back and forth, the resistance of the hydraulic oil to the piston assembly can form damping force when the hinge moves, and further, the buffering effect of the hinge is realized.

4. According to the utility model, the rear cover is connected with the first port and is used for sealing one end of the inner pipe far away from the sealing assembly, the rear cover is provided with the first oil hole and the second oil hole, one of the first oil hole and the second oil hole is communicated with the inner side of the inner pipe, and the other of the first oil hole and the second oil hole is communicated with the outer side of the inner pipe, so that hydraulic oil is prevented from flowing out from one end of the inner pipe far away from the sealing assembly, hydraulic oil can flow through the first oil hole and the second oil hole, and the first oil hole and the second oil hole can be used for forming an oil way for hydraulic oil to flow.

5. According to the hydraulic oil circulation device, the pressure regulating bolt is arranged and is rotationally connected with the rear cover, and the pressure regulating bolt is provided with the oil passage which is communicated with the first oil hole and the second oil hole, so that the oil passage, the first oil hole, the second oil hole, the outer wall of the inner pipe, the oil passage and the inner wall of the inner pipe form a hydraulic oil circulation path.

6. According to the utility model, the reducing section is arranged at one end of the oil passage and is communicated with the first oil hole, the cross section area of the reducing section is smaller than that of the first oil hole and gradually extends along the circumferential direction of the pressure regulating bolt, and as can be understood, the position of the reducing section corresponding to the first oil hole can be changed by rotating the pressure regulating bolt, and the oil passing area of hydraulic oil in the reducing section is regulated, so that the flow velocity of the hydraulic oil is regulated, and further, the buffering speed of a hinge is regulated, and in addition, the reducing section gradually extends along the circumferential direction of the pressure regulating bolt, so that Zhou Changzhi of rotation of the pressure regulating bolt is converted into the regulating distance of the reducing section, and the efficiency of regulating the buffering speed of the hinge is improved.

7. According to the utility model, the risk of oil leakage can be reduced through the pressure regulating bolt, the service life of the hinge is prolonged, and the traditional hinge is realized by matching the threaded connection between the connecting part and the lower sealing cover, so that the threaded connection has a large matching clearance, the oil leakage phenomenon is easy to occur in the use process.

According to some embodiments of the utility model, the oil passage further has a sealing section disposed along a circumferential direction of the pressure regulating bolt, the sealing section being located between both ends of the reducing section, the sealing section sealing the first oil hole in cooperation with the first oil hole.

According to some embodiments of the utility model, the rear cover has a second cavity, an end of the second cavity away from the inner tube has a second port, the second port penetrates through an end of the rear cover away from the inner tube, the first oil hole and the second oil hole are communicated with the second cavity, and the second cavity accommodates the pressure regulating bolt.

According to some embodiments of the utility model, an end of the pressure regulating bolt remote from the inner tube has an adjustment groove for rotating the pressure regulating bolt.

According to some embodiments of the utility model, a part of the rear cover extends into the inner tube, a first sealing ring is arranged between the rear cover and the inner wall of the inner tube, and the first oil hole is positioned on one side of the first sealing ring, which is close to the inner tube.

According to some embodiments of the utility model, a second sealing ring is arranged between the rear cover and the inner wall of the first cavity, the second oil hole is communicated with the outer side of the inner pipe, and the second oil hole is positioned at one side of the second sealing ring close to the inner pipe.

According to some embodiments of the utility model, a third sealing ring is arranged between the pressure regulating bolt and the rear cover, and the third sealing ring is positioned on one side of the oil passage away from the inner pipe.

According to some embodiments of the utility model, the piston assembly comprises a piston rod, a piston head and a positioning member, the piston rod penetrates through the sealing assembly, the piston rod comprises a body portion and a mounting portion located at one end of the body portion close to the inner tube, the diameter of the mounting portion is smaller than that of the body portion, the positioning member is arranged at one end of the mounting portion away from the body portion, the piston head is sleeved on the mounting portion, and the piston head is movably arranged between the body portion and the positioning member.

According to some embodiments of the utility model, the sealing assembly comprises a first bearing and a first baffle plate arranged on one side of the first bearing away from the inner tube, wherein the first baffle plate is used for abutting against the inner wall of the first cavity, the first bearing is used for abutting against the end part of the inner tube, a first oil seal is arranged between the first bearing and the piston assembly, and a fourth sealing ring is arranged between the first bearing and the inner wall of the first cavity.

According to some embodiments of the utility model, the first cylinder is provided with a first spiral groove, the first spiral groove is provided with a first pin, the first pin is connected with the piston assembly, and the first pin moves along the first spiral groove to drive the piston assembly to move relative to the inner tube.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

Fig. 1 is a schematic structural view of a hydraulic buffer hinge according to an embodiment of the present utility model;

Fig. 2 is an enlarged view at a shown in fig. 1;

Fig. 3 is an enlarged view at B shown in fig. 2;

FIG. 4 is a schematic structural view of the inner tube shown in FIG. 2;

fig. 5 is a schematic structural view of the rear cover shown in fig. 2;

FIG. 6 is a schematic view of the pressure regulating pin of FIG. 2;

Fig. 7 is a C-C cross-sectional view shown in fig. 6.

Reference numerals: 100-first cylinder, 110-first cavity, 120-first port, 130-inner tube, 140-oil return hole, 150-seal assembly, 160-piston assembly, 170-rear cover, 180-first oil hole, 190-second oil hole, 200-pressure regulating bolt, 210-oil passing channel, 220-reducing section, 230-seal section, 240-second cavity, 250-second port, 260-regulating groove, 270-first seal ring, 280-second seal ring, 290-third seal ring, 300-piston rod, 310-piston head, 320-positioning piece, 330-body part, 340-mounting part, 350-first bearing, 360-first baffle, 370-first oil seal, 380-fourth seal ring, 390-first spiral groove, 400-first pin.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

A hydraulic cushion hinge according to an embodiment of the present utility model is described below with reference to the accompanying drawings.

Referring to fig. 1 and 2, a hydraulic buffer hinge according to an embodiment of the present utility model includes a first cylinder 100, an inner pipe 130, a sealing assembly 150, a piston assembly 160, a rear cover 170, and a pressure regulating bolt 200.

In some specific embodiments, the first cylinder 100 is provided with a first spiral groove 390, the first spiral groove 390 is provided with a first pin 400, the first pin 400 is connected with the piston assembly 160, and the first pin 400 moves along the first spiral groove 390 to drive the piston assembly 160 and the inner tube 130 to move relatively, so that the piston assembly 160 pushes hydraulic oil to flow when the door is opened or closed.

In some embodiments, the hydraulic buffer hinge further includes a first leaf and a second leaf hinged to each other, one of the first leaf and the second leaf being used to connect the door frame, the other of the first leaf and the second leaf being used to connect the door leaf, the first leaf being connected to the first cylinder 100, the second leaf being slidably connected to the first pin 400, the first pin 400 sliding in the direction of movement of the piston assembly 160, such that when the door is opened and closed, one of the first leaf and the second leaf connecting the door leaf rotates such that the first leaf and the second leaf cooperate to move the first pin 400 along the first helical groove 390, and in turn such that the first pin 400 moves the piston assembly 160 relative to the inner tube 130.

Further, the outer surface of the first cylinder body 100 is provided with straight knurling, the first page body is sleeved outside the first cylinder body 100, and the first page body is in interference fit with the straight knurling of the first cylinder body 100.

Further, the first page body is connected with the door frame, and the second page body is connected with the door leaf.

For the first cylinder 100, the first cylinder 100 has a first chamber 110, and one end of the first chamber 110 has a first port 120 penetrating the first cylinder 100.

Referring to fig. 3 and 4, for the inner tube 130, the inner tube 130 is disposed in the first chamber 110, and a sidewall of an end of the inner tube 130 remote from the first port 120 has an oil return hole 140.

In this embodiment, by providing the first cylinder 100 and the inner tube 130, the first cylinder 100 has the first cavity 110, one end of the first cavity 110 has the first port 120 penetrating through the first cylinder 100, the inner tube 130 is disposed in the first cavity 110, and the sidewall of one end of the inner tube 130 away from the first port 120 has the oil return hole 140, so that the hydraulic pressure can circulate outside the inner tube 130, the oil return hole 140 and inside the inner tube 130, and the outside of the inner tube 130, the oil return hole 140 and inside of the inner tube 130 form an oil path through which the hydraulic oil flows.

With respect to the seal assembly 150, the seal assembly 150 is disposed within the first chamber 110, and the seal assembly 150 is configured to seal an end of the inner tube 130 remote from the first port 120, thereby preventing hydraulic oil from flowing out of the end of the inner tube 130 remote from the first port 120, such that hydraulic oil can flow through the oil passing hole.

For the piston assembly 160, the piston assembly 160 penetrates through the sealing assembly 150, and the piston assembly 160 is in sliding fit with the inner wall of the inner tube 130, so that when the piston assembly 160 moves back and forth in the inner tube 130, hydraulic oil can be driven to flow back and forth, the resistance of the hydraulic oil to the piston assembly 160 can form a damping force when a hinge moves, and further, the buffering effect of the hinge is achieved.

Referring to fig. 2 and 5, for the rear cover 170, the rear cover 170 is connected to the first port 120, the rear cover 170 serves to seal an end of the inner tube 130 remote from the sealing assembly 150, the rear cover 170 has a first oil hole 180 and a second oil hole 190, one of the first oil hole 180 and the second oil hole 190 communicates with an inner side of the inner tube 130, and the other of the first oil hole 180 and the second oil hole 190 communicates with an outer side of the inner tube 130, thereby preventing hydraulic oil from flowing out of an end of the inner tube 130 remote from the sealing assembly 150, so that hydraulic oil can flow through the first oil hole 180 and the second oil hole 190, and thus, the first oil hole 180 and the second oil hole 190 can be used to form an oil path through which hydraulic oil flows.

Referring to fig. 2, 6 and 7, for the pressure regulating bolt 200, the pressure regulating bolt 200 is rotatably connected with the rear cover 170, and the pressure regulating bolt 200 has an oil passage 210, and the oil passage 210 communicates with the first oil hole 180 and the second oil hole 190, such that the oil passage 210 forms a circulation oil path of hydraulic oil with the first oil hole 180, the second oil hole 190, the outer wall of the inner pipe 130, the oil passage hole, and the inner wall of the inner pipe 130.

Further, one end of the oil passage 210 has a reducing section 220, the reducing section 220 is communicated with the first oil hole 180, and the cross-sectional area of the reducing section 220 is smaller than that of the first oil hole 180 and gradually tapers along the circumferential direction of the pressure regulating bolt 200.

It can be appreciated that by rotating the pressure regulating bolt 200, the position of the diameter-variable section 220 corresponding to the first oil hole 180 can be changed, and the oil passing area of hydraulic oil in the diameter-variable section 220 can be adjusted, so that the flow rate of the hydraulic oil can be adjusted, and further, the buffering speed of the hinge can be adjusted, in addition, the diameter-variable section 220 is gradually reduced and extended along the circumferential direction of the pressure regulating bolt 200, so that the circumference of the rotation of the pressure regulating bolt 200 is directly converted into the adjusting distance of the diameter-variable section 220, and the efficiency of adjusting the buffering speed of the hinge can be improved.

Furthermore, this embodiment can reduce the risk of oil leak through pressure regulating bolt 200, improve the life of hinge, can with understanding that traditional hinge regulation buffering speed needs to be realized by the threaded connection cooperation between connecting portion and the lower closing cap, threaded connection fit clearance is big, and the oil leak phenomenon appears easily in the use, and this embodiment realizes adjusting the buffering speed of hinge through the rotation of pressure regulating bolt 200 in back lid 170, and the cooperation is inseparable between pressure regulating bolt 200 and the back lid 170, thereby reduces the risk of oil leak, improves the life of hinge.

Specifically, the hinge oil leakage test result shows that the highest oil leakage can be achieved up to five million times.

In some specific embodiments, the oil passage 210 further has a sealing section 230, the sealing section 230 is disposed along the circumference of the pressure regulating bolt 200, the sealing section 230 is located between two ends of the reducing section 220, and the sealing section 230 cooperates with the first oil hole 180 to seal the first oil hole 180.

It can be appreciated that when the pressure regulating bolt 200 is rotated such that the seal segment 230 abuts against the first oil hole 180, the seal segment 230 can seal the first oil hole 180, thereby making the seal segment 230 prevent the flow of hydraulic oil, and thus, fixing the opening and closing angle of the hydraulic buffer hinge.

In some specific embodiments, the rear cover 170 has a second cavity 240, an end of the second cavity 240 remote from the inner tube 130 has a second port 250, the second port 250 penetrates through an end of the rear cover 170 remote from the inner tube 130, the first oil hole 180 and the second oil hole 190 are communicated with the second cavity 240, and the second cavity 240 accommodates the pressure regulating bolt 200, so that the pressure regulating bolt 200 can be conveniently rotated and adjusted through the second port 250, and the rear cover 170 is prevented from interfering with the adjustment of the pressure regulating bolt 200.

In some embodiments, the end of the pressure regulating bolt 200 remote from the inner tube 130 has an adjustment slot 260, the adjustment slot 260 being used to rotate the pressure regulating bolt 200.

It can be appreciated that by inserting the tool into the adjustment slot 260, when the tool is rotated, the adjustment bolt 200 is rotated by the cooperation of the tool and the adjustment slot 260, thereby more conveniently driving the adjustment bolt 200 to rotate.

In some embodiments, the adjustment slot 260 is a hex slot and the tool may use a hex key.

In some specific embodiments, a portion of the rear cover 170 extends into the inner tube 130, and a first seal ring 270 is disposed between the rear cover 170 and the inner wall of the inner tube 130, and the first oil hole 180 is located at a side of the first seal ring 270 adjacent to the inner tube 130.

It will be appreciated that the hydraulic oil inside the inner tube 130 can enter and exit the first oil hole 180 from a portion extending into the inner tube 130, and at the same time, the first seal ring 270 can seal the gap between the rear cover 170 and the inner wall of the inner tube 130, so as to reduce the risk of oil leakage between the rear cover 170 and the inner wall of the inner tube 130, thereby improving the sealing performance of the hinge.

In some specific embodiments, a second sealing ring 280 is disposed between the rear cover 170 and the inner wall of the first cavity 110, the second oil hole 190 is communicated with the outer side of the inner tube 130, and the second oil hole 190 is located on one side, close to the inner tube 130, of the second sealing ring 280, so that hydraulic oil outside the inner tube 130 can enter and exit the second oil hole 190, meanwhile, the second sealing ring 280 can seal a gap between the rear cover 170 and the inner wall of the first cavity 110, so that the risk of oil leakage between the rear cover 170 and the inner wall of the first cavity 110 is reduced, and further, the sealing performance of the hinge is improved.

In some specific embodiments, a third sealing ring 290 is disposed between the pressure regulating bolt 200 and the rear cover 170, and the third sealing ring 290 is located on a side of the oil passage 210 far away from the inner tube 130, so that the third sealing ring 290 can seal a gap between the pressure regulating bolt 200 and the rear cover 170, reduce the risk of oil leakage between the pressure regulating bolt 200 and the rear cover 170, and further improve the tightness of the hinge.

In some embodiments, the piston assembly 160 includes a piston rod 300, a piston head 310, and a retainer 320, the piston rod 300 extending through the seal assembly 150, the piston rod 300 including a body portion 330 and a mounting portion 340 at an end of the body portion 330 proximate to the inner tube 130, the mounting portion 340 having a smaller diameter than the body portion 330, the retainer 320 being disposed at an end of the mounting portion 340 remote from the body portion 330, the piston head 310 being sleeved on the mounting portion 340, the piston head 310 being slidably disposed between the body portion 330 and the retainer 320.

It can be appreciated that the diameter of the mounting portion 340 is smaller than that of the body portion 330, the positioning member 320 is disposed at one end of the mounting portion 340 away from the body portion 330, and the piston head 310 is sleeved on the mounting portion 340, so that the body portion 330 and the positioning member 320 can limit the piston head 310, and the piston head 310 is prevented from falling off.

In some specific embodiments, the seal assembly 150 includes a first bearing 350 and a first baffle 360 disposed on a side of the first bearing 350 remote from the inner tube 130, the first baffle 360 being configured to abut an inner wall of the first cavity 110, the first bearing 350 being configured to abut an end of the inner tube 130, a first oil seal 370 being disposed between the first bearing 350 and the piston assembly 160, and a fourth seal 380 being disposed between the first bearing 350 and the inner wall of the first cavity 110.

It will be appreciated that the first bearing 350 is capable of supporting the first cylinder 100 and the piston assembly 160 on the one hand such that the frictional resistance upon relative rotation of the first cylinder 100 and the piston assembly 160 is smaller, and on the other hand, by providing the first oil seal 370 between the first bearing 350 and the piston assembly 160 and the fourth seal 380 between the first bearing 350 and the inner wall of the first chamber 110, the seal between the first bearing 350 and the piston assembly 160 and between the first bearing 350 and the inner wall of the first chamber 110 is better, thereby reducing the risk of oil leakage from the hydraulic pressure.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims (10)

1. A hydraulic cushion hinge, comprising:

A first cylinder (100) having a first cavity (110), one end of the first cavity (110) having a first port (120) penetrating the first cylinder (100);

An inner tube (130) disposed in the first chamber (110), and having an oil return hole (140) on a side wall of one end far from the first port (120);

A sealing assembly (150) disposed within the first chamber (110) for sealing an end of the inner tube (130) remote from the first port (120);

A piston assembly (160) extending through the seal assembly (150) and slidably engaging the inner wall of the inner tube (130);

A rear cover (170) connected with the first port (120) for sealing one end of the inner tube (130) away from the sealing assembly (150), having a first oil hole (180) and a second oil hole (190), one of the first oil hole (180) and the second oil hole (190) communicating with the inner side of the inner tube (130), the other of the first oil hole (180) and the second oil hole (190) communicating with the outer side of the inner tube (130);

The pressure regulating bolt (200) is rotationally connected with the rear cover (170), and is provided with an oil passage (210), the oil passage (210) is communicated with the first oil hole (180) and the second oil hole (190), one end of the oil passage (210) is provided with a reducing section (220), the reducing section (220) is communicated with the first oil hole (180), and the cross section area of the reducing section (220) is smaller than the cross section area of the first oil hole (180) and gradually extends along the circumferential direction of the pressure regulating bolt (200).

2. The hydraulic buffer hinge according to claim 1, wherein the oil passage (210) further has a sealing section (230), the sealing section (230) is disposed along a circumferential direction of the pressure regulating bolt (200), the sealing section (230) is located between two ends of the reducing section (220), and the sealing section (230) cooperates with the first oil hole (180) to seal the first oil hole (180).

3. The hydraulic buffer hinge according to claim 1, wherein the rear cover (170) has a second cavity (240), an end of the second cavity (240) away from the inner tube (130) has a second port (250), the second port (250) penetrates through an end of the rear cover (170) away from the inner tube (130), the first oil hole (180) and the second oil hole (190) are communicated with the second cavity (240), and the second cavity (240) accommodates the pressure regulating bolt (200).

4. A hydraulic buffer hinge according to claim 3 characterised in that the end of the pressure regulating bolt (200) remote from the inner tube (130) has an adjustment slot (260), the adjustment slot (260) being adapted to rotate the pressure regulating bolt (200).

5. The hydraulic buffer hinge according to claim 1, wherein a portion of the rear cover (170) extends into the inner tube (130), a first sealing ring (270) is disposed between the rear cover (170) and the inner wall of the inner tube (130), and the first oil hole (180) is located on a side of the first sealing ring (270) close to the inner tube (130).

6. The hydraulic buffer hinge according to claim 1, wherein a second sealing ring (280) is disposed between the rear cover (170) and the inner wall of the first cavity (110), the second oil hole (190) is communicated with the outer side of the inner pipe (130), and the second oil hole (190) is located at one side of the second sealing ring (280) close to the inner pipe (130).

7. The hydraulic buffer hinge according to claim 1, characterized in that a third sealing ring (290) is arranged between the pressure regulating bolt (200) and the rear cover (170), and the third sealing ring (290) is located at one side of the oil passage (210) away from the inner pipe (130).

8. The hydraulic buffering hinge according to claim 1, wherein the piston assembly (160) comprises a piston rod (300), a piston head (310) and a positioning member (320), the piston rod (300) penetrates through the sealing assembly (150), the piston rod (300) comprises a body portion (330) and a mounting portion (340) located at one end of the body portion (330) close to the inner tube (130), the diameter of the mounting portion (340) is smaller than that of the body portion (330), the positioning member (320) is arranged at one end, far away from the body portion (330), of the mounting portion (340), the piston head (310) is sleeved on the mounting portion (340), and the piston head (310) is movably arranged between the body portion (330) and the positioning member (320).

9. The hydraulic buffering hinge according to claim 1, wherein the sealing assembly (150) comprises a first bearing (350) and a first baffle (360) arranged on one side, away from the inner tube (130), of the first bearing (350), the first baffle (360) is used for being abutted against the inner wall of the first cavity (110), the first bearing (350) is used for being abutted against the end part of the inner tube (130), a first oil seal (370) is arranged between the first bearing (350) and the piston assembly (160), and a fourth sealing ring (380) is arranged between the first bearing (350) and the inner wall of the first cavity (110).

10. The hydraulic buffering hinge according to claim 1, wherein the first cylinder body (100) is provided with a first spiral groove (390), the first spiral groove (390) is provided with a first pin (400), the first pin (400) is connected with the piston assembly (160), and the first pin (400) moves along the first spiral groove (390) to drive the piston assembly (160) and the inner pipe (130) to move relatively.