Hydraulic door leaf hinge

Abstract

The utility model provides a hydraulic door leaf hinge which comprises a hydraulic buffering assembly and a hinge assembly which are used in cooperation with each other, the hydraulic buffering assembly comprises a shell, a hydraulic cylinder body installed in the shell in a sliding mode and a piston fixed to the shell, and the piston is arranged in the hydraulic cylinder body and divides the interior of the hydraulic cylinder body into a left piston cavity and a right piston cavity; a valve seat is fixed to the end, close to the right piston cavity, of the piston, a movable seat is slidably mounted in an inner piston cavity of the piston, and the left piston cavity communicates with the inner piston cavity. The valve seat is provided with a center flow channel used for communicating the right piston cavity with the inner piston cavity, and the movable seat is used for opening and closing the center flow channel. The movable seat is provided with a pressure relief channel, when the door is closed, the movable seat abuts against the valve seat, and pressure in the inner cavity of the piston is relieved into the right cavity of the piston through the pressure relief channel. The hydraulic door leaf hinge overcomes the defects that an existing hydraulic damping hinge is complex in oil way structure and large in overall size.

Description

Technical Field

[0001] The utility model relates to the field of door leaf hinges, in particular to a hydraulic door leaf hinge. Background Art

[0002] Hydraulic damping hinges utilize the directional flow of damping oil in a sealed container to achieve a buffering effect and are widely used in household products. For example, they are applied to the cabinet doors of wardrobes, bookcases, etc., enabling the cabinet doors to open quickly and close slowly, and can also reduce the impact force automatically under the action of external strong forces and close gently; when applied to the winding mechanism of a projection screen, it can make the projection screen fall quickly and rise slowly, without mechanical jitter or impact on the reel, being stable and silent; it can also be applied to various covers, enabling the covers to open quickly and close slowly.

[0003] The existing hydraulic damping hinges have a relatively complex hydraulic oil circuit structure and poor oil circuit reliability; moreover, there are more overall components, larger sizes, and inconvenient installation. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] The problem to be solved by the utility model is to provide a hydraulic door leaf hinge to overcome the defects of the complex oil circuit structure and the relatively large overall size of the existing hydraulic damping hinges.

[0006] (2) Technical Solutions

[0007] To solve the above technical problems, the utility model provides a hydraulic door leaf hinge, which includes a hydraulic buffer assembly and a hinge assembly that are used in cooperation. The hydraulic buffer assembly includes a housing, a hydraulic cylinder body slidably installed in the housing, and a piston fixed to the housing. The piston is placed in the hydraulic cylinder body and divides the interior of the hydraulic cylinder body into a piston left chamber and a piston right chamber; a valve seat is fixed to one end of the piston close to the piston right chamber, and a movable seat is slidably installed in the piston inner cavity of the piston. The piston left chamber is communicated with the piston inner cavity; a central flow channel for communicating the piston right chamber and the piston inner cavity is provided on the valve seat, and the movable seat is used to open and close the central flow channel; a pressure relief channel is provided on the movable seat. When closing the door, the movable seat abuts against the valve seat, and the pressure in the piston inner cavity is relieved to the piston right chamber through the pressure relief channel.

[0008] In some embodiments, a guide rod is inserted through a central hole of the movable seat, and a pressure relief channel is formed between an outer wall of the guide rod and an inner wall of the central hole. The piston is fixedly connected to the housing through a piston rod. One end of the piston rod is fixed to the housing, and the other end thereof is fixed to the piston. One end of the guide rod is placed inside the piston rod, and the other end thereof is placed inside the central flow channel, and there is a gap between the central flow channel and the guide rod.

[0009] In some embodiments, at least one axially extending communication groove is provided on an outer circumferential wall of the piston rod, and an inner cavity of the piston communicates with a left cavity of the piston through the communication groove.

[0010] In some embodiments, a guide rod groove is axially provided at a center of one end of the piston rod, the guide rod is placed inside the guide rod groove, and there is a gap between the guide rod groove and the guide rod. Through holes extending radially are symmetrically provided on an outer wall of the piston rod, and the through holes communicate with the guide rod groove.

[0011] In some embodiments, a spring is sleeved on the piston rod, an end cover is fixed to one end of the hydraulic cylinder body, one end of the spring abuts against the housing, and the other end abuts against the end cover.

[0012] In some embodiments, a flange is provided at one end of the movable seat facing the valve seat, and there is a gap between the flange and an inner wall of the inner cavity of the piston.

[0013] In some embodiments, the housing includes a box body having an opening at one end. The hydraulic cylinder body, the piston rod and the spring are all placed inside the box body, and a cover plate is fixed at the opening. Connecting ears are symmetrically fixed at two ends of the box body.

[0014] In some embodiments, the hinge assembly is installed at one end of the hydraulic buffer assembly. The hinge assembly includes a seat body and a camshaft fixed to the seat body. The camshaft is inserted into the housing and abuts against the hydraulic cylinder body. A first buffer pad is installed at one end of the hydraulic cylinder body close to the camshaft, and a second buffer pad is installed at a top end of the camshaft.

[0015] (III) Beneficial effects

[0016] A hydraulic door leaf hinge provided by the utility model simplifies the traditional oil circuit design. Through the cooperation of a movable seat, a valve cover and a piston, when the door is opened, the movable seat opens the central flow channel, and the hydraulic oil in the right cavity of the piston enters the left cavity of the piston through the central flow channel and the communication groove, and the hydraulic oil flows smoothly; when the door is closed, the movable seat abuts against the valve cover to close the central flow channel, and the hydraulic oil in the left cavity of the piston enters the right cavity of the piston through the communication groove and the pressure relief channel. The pressure relief channel is formed by the guide rod and the central hole of the movable seat, with a small gap and good damping effect; its oil circuit structure is simple and the oil circuit reliability is good; the overall number of parts is small, the structure is compact, the size is small, and the installation is convenient; it overcomes the defects of the complex oil circuit structure and the large overall size of the existing hydraulic damping hinge. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 is a perspective view of a hydraulic door leaf hinge of the present utility model;

[0019] Figure 2 is an exploded view of a hydraulic door leaf hinge of the present utility model;

[0020] Figure 3 is a sectional view of a hydraulic door leaf hinge of the present utility model;

[0021] Figure 4 is a sectional view of a part of the hydraulic buffer assembly of a hydraulic door leaf hinge of the present utility model;

[0022] Figure 5 is a perspective view of the connection of the piston rod, the movable seat and the valve seat of a hydraulic door leaf hinge of the present utility model;

[0023] The corresponding component names for the reference numerals in the drawings are: 1. Hydraulic buffer assembly; 11. Housing; 12. Hydraulic cylinder body; 13. Piston; 14. Valve seat; 15. Movable seat; 16. Guide rod; 17. Piston rod; 18. Spring; 111. Box body; 112. Cover plate; 113. Connecting ear; 121. Left cavity of the piston; 122. Right cavity of the piston; 123. End cover; 124. First buffer pad; 131. Inner cavity of the piston; 141. Central flow channel; 151. Pressure relief channel; 152. Flange; 171. Communication groove; 172. Guide rod groove; 173. Through hole; 2. Hinge assembly; 21. Seat body; 22. Camshaft; 23. Second buffer pad. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present application will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] The following specific examples illustrate the implementation manners of the present application. Those skilled in the art can easily understand the other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0026] It should be noted that the following describes various aspects of the embodiments within the scope of the appended claims. It should be obvious that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is illustrative only. Based on the present application, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects described herein can be used to implement the device and / or practice the method. In addition, this device can be implemented and this method can be practiced using other structures and / or functions in addition to one or more of the aspects described herein.

[0027] It should also be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of the present application. The drawings only show the components related to the present application, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0028] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the examples can be practiced without these specific details.

[0029] The following describes the technical solutions provided by each embodiment of the present application in conjunction with the accompanying drawings.

[0030] Referring to Figures 1 to 5 , the present utility model provides a hydraulic door leaf hinge, which includes a hydraulic buffer assembly 1 and a hinge assembly 2 that are used in cooperation. The hydraulic buffer assembly 1 and the hinge assembly 2 are alternatively installed on the door frame, and the other is installed on the door leaf.

[0031] Referring toFigure 3 and Figure 4 , the hydraulic buffer assembly 1 includes a housing 11, a hydraulic cylinder body 12 slidably mounted in the housing 11, and a piston 13 fixed to the housing 11. The hydraulic cylinder body 12 can slide along the length direction of the housing 11. The piston 13 is placed inside the hydraulic cylinder body 12 and divides the interior of the hydraulic cylinder body 12 into a piston left chamber 121 and a piston right chamber 122. A valve seat 14 is fixed to one end of the piston 13 close to the piston right chamber 122. A piston inner cavity 131 is formed between the piston 13 and the valve seat 14. A movable seat 15 is slidably mounted in the piston inner cavity 131 of the piston 13. The piston left chamber 121 communicates with the piston inner cavity 131. A central flow channel 141 for communicating the piston right chamber 122 and the piston inner cavity 131 is provided on the valve seat 14. The movable seat 15 is used to open and close the central flow channel 141. A pressure relief channel 151 is provided on the movable seat 15, and the pressure relief channel 151 can communicate with the central flow channel 141. In order to have a better damping effect, the pressure relief channel 151 is relatively small. When the door is closed, the movable seat 15 abuts against the valve seat 14, and the movable seat 15 closes the central flow channel 141. The pressure in the piston inner cavity 131 can only be relieved to the piston right chamber 122 through the pressure relief channel 151. Its oil circuit structure is simple and reliable, and the overall number of components is small.

[0032] In some embodiments, as Figure 4 shown, a guide rod 16 is inserted into the central hole of the movable seat 15. The guide rod 16 is used to guide the movable seat 15. A pressure relief channel 151 is formed between the outer wall of the guide rod 16 and the inner wall of the central hole. In order to have a better damping effect, the diameter of the central hole is slightly larger than the outer diameter of the guide rod 16, so that the size of the pressure relief channel 151 is relatively small.

[0033] In some embodiments, as Figure 3 and Figure 4 shown, the piston 13 is fixedly connected to the housing 11 through a piston rod 17. One end of the piston rod 17 is fixed to the housing 11, and the other end of the piston rod 17 is fixed to the piston 13. One end of the guide rod 16 is placed inside the piston rod 17, and the other end is placed inside the central flow channel 141. There is a gap between the central flow channel 141 and the guide rod 16. Among them, in order to make the flow of hydraulic oil smoother, the difference in size between the central flow channel 141 and the guide rod 16 is relatively large.

[0034] In some embodiments, as Figure 4 and Figure 5As shown, at least one axially extending communication groove 171 is provided on the outer circumferential wall of the piston rod 17, and the inner cavity 131 of the piston communicates with the left cavity 121 of the piston through the communication groove 171. In this embodiment, the communication groove 171 is provided as one. A guide rod groove 172 is axially provided at the center of one end of the piston rod 17, and the guide rod 16 is placed in the guide rod groove 172, and there is a gap between the guide rod groove 172 and the guide rod 16; through holes 173 extending radially are symmetrically provided on the outer wall of the piston rod 17, and the through holes 173 communicate with the guide rod groove 172. Through the cooperation of the guide rod groove 172 and the through holes 173, when opening the door, the hydraulic oil in the inner cavity 131 of the piston can enter the left cavity 121 of the piston through the guide rod groove 172 and the through holes 173, further increasing the oil inlet speed and making the door opening smoother.

[0035] In some embodiments, such as Figure 2 and Figure 3 As shown, a spring 18 is sleeved on the piston rod 17, an end cover 123 is fixed at one end of the hydraulic cylinder body 12, one end of the spring 18 abuts against the housing 11, and the other end abuts against the end cover 123.

[0036] In some embodiments, such as Figure 4 and Figure 5 As shown, a flange 152 is provided at one end of the movable seat 15 facing the valve seat 14, and there is a gap between the flange 152 and the inner wall of the inner cavity 131 of the piston. The setting of the flange 152 can increase the contact area with the valve seat 14 and make the closing of the central flow channel 141 more reliable.

[0037] In some embodiments, such as Figure 2 As shown, the housing 11 includes a box body 111 with an opening at one end, the hydraulic cylinder body 12, the piston rod 17 and the spring 18 are all placed in the box body 111, and a cover plate 112 is fixed at the opening; connecting ears 113 are symmetrically fixed at both ends of the box body 111. By using a box body with only one end open, the housing structure is more stable, the spring 18 has better support when compressed, and the overall structure is more stable.

[0038] In some embodiments, such as Figure 1 and Figure 2 As shown, the hinge assembly 2 is installed at one end of the hydraulic buffer assembly 1, the hinge assembly 2 includes a seat body 21 and a camshaft 22 fixed on the seat body 21, and the camshaft 22 is inserted into the housing 11 and abuts against the hydraulic cylinder body 12. When opening the door, the hinge assembly 2 rotates around the camshaft 22, and the camshaft 22 makes the hydraulic cylinder body 12 slide towards the spring 18, and the spring 18 is compressed; when closing the door, the hinge assembly 2 rotates around the camshaft 22, and the spring 18 makes the hydraulic cylinder body 12 slide towards the direction of the camshaft 22. Among them, a first buffer pad 124 is installed at one end of the hydraulic cylinder body 12 close to the camshaft 22, and a second buffer pad 23 is installed at the top of the camshaft 22, which is beneficial to extending the service life.

[0039] The following is the usage process of this hydraulic door leaf hinge:

[0040] When opening the door, the hinge assembly 2 rotates around the camshaft 22. The camshaft 22 causes the hydraulic cylinder body 12 to slide towards the spring 18, and the spring 18 is compressed. During the movement of the hydraulic cylinder body 12, the hydraulic oil pushes the movable seat 15 towards the piston rod 17 and abuts against the piston rod 17. The hydraulic oil in the right piston chamber 122 enters the inner piston chamber 131 through the central flow channel 141. Most of the hydraulic oil in the inner piston chamber 131 enters the left piston chamber 121 through the communication groove 171, and a small amount of the hydraulic oil enters the left piston chamber 121 through the guide rod groove 172 and the through hole 173. The hydraulic oil flows smoothly, and the door opening is smooth. When closing the door, the hinge assembly 2 rotates around the camshaft 22. The spring 18 causes the hydraulic cylinder body 12 to slide towards the camshaft 22. During the movement of the hydraulic cylinder body 12, the hydraulic oil pushes the movable seat 15 towards the valve seat 14 and abuts against the valve seat 14. At this time, the central flow channel 141 is closed. The hydraulic oil in the left piston chamber 121 enters the inner piston chamber 131 through the communication groove 171 and the guide rod groove 172. The hydraulic oil in the inner piston chamber 131 enters the right piston chamber 122 through the pressure relief channel 151. Since the size of the pressure relief channel 151 is small, the hydraulic oil flows slowly, and the damping effect is good.

[0041] For the same and similar parts among the various embodiments in this specification, reference can be made to each other. Each embodiment focuses on the differences from other embodiments.

[0042] The above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in this application should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. A hydraulic door leaf hinge, comprising a hydraulic buffer assembly (1) and a hinge assembly (2) used in cooperation with each other, characterized in that: The hydraulic buffer assembly (1) includes a housing (11), a hydraulic cylinder body (12) slidably mounted in the housing (11), and a piston (13) fixed to the housing (11). The piston (13) is disposed in the hydraulic cylinder body (12) and divides the interior of the hydraulic cylinder body (12) into a piston left chamber (121) and a piston right chamber (122); a valve seat (14) is fixed to one end of the piston (13) close to the piston right chamber (122), and a movable seat (15) is slidably mounted in the piston inner cavity (131) of the piston (13). The piston left chamber (121) communicates with the piston inner cavity (131); a central flow channel (141) for communicating the piston right chamber (122) and the piston inner cavity (131) is provided on the valve seat (14), and the movable seat (15) is used to open and close the central flow channel (141); a pressure relief channel (151) is provided on the movable seat (15). When closing the door, the movable seat (15) abuts against the valve seat (14), and the pressure in the piston inner cavity (131) is relieved to the piston right chamber (122) through the pressure relief channel (151).

2. The hydraulic door leaf hinge according to claim 1, wherein: A guide rod (16) is inserted through the central hole of the movable seat (15), and a pressure relief channel (151) is formed between the outer wall of the guide rod (16) and the inner wall of the central hole.

3. The hydraulic door leaf hinge according to claim 2, wherein: The piston (13) is fixedly connected to the housing (11) through a piston rod (17). One end of the piston rod (17) is fixed to the housing (11), and the other end is fixed to the piston (13); one end of the guide rod (16) is disposed in the piston rod (17), and the other end is disposed in the central flow channel (141), and there is a gap between the central flow channel (141) and the guide rod (16).

4. The hydraulic door leaf hinge according to claim 3, characterized in that: At least one axially extending communication groove (171) is provided on the outer circumferential wall of the piston rod (17), and the piston inner cavity (131) communicates with the piston left chamber (121) through the communication groove (171).

5. The hydraulic door leaf hinge according to claim 3, characterized in that: A guide rod groove (172) is axially provided at the center of one end of the piston rod (17), and the guide rod (16) is disposed in the guide rod groove (172), and there is a gap between the guide rod groove (172) and the guide rod (16); through holes (173) extending radially are symmetrically provided on the outer wall of the piston rod (17), and the through holes (173) communicate with the guide rod groove (172).

6. The hydraulic door leaf hinge according to claim 3, characterized in that: A spring (18) is sleeved on the piston rod (17), and an end cover (123) is fixed to one end of the hydraulic cylinder body (12). One end of the spring (18) abuts against the housing (11), and the other end abuts against the end cover (123).

7. The hydraulic door leaf hinge according to claim 4, characterized in that: A flange (152) is provided at one end of the movable seat (15) facing the valve seat (14), and there is a gap between the flange (152) and the inner wall of the piston inner cavity (131).

8. The hydraulic door leaf hinge according to claim 6, wherein: The housing (11) includes a box body (111) with an opening at one end. The hydraulic cylinder body (12), the piston rod (17), and the spring (18) are all placed inside the box body (111), and a cover plate (112) is fixed at the opening. Connecting ears (113) are symmetrically fixed at both ends of the box body (111).

9. The hydraulic door leaf hinge according to claim 1, characterized in that: The hinge assembly (2) is installed at one end of the hydraulic buffer assembly (1). The hinge assembly (2) includes a seat body (21) and a camshaft (22) fixed on the seat body (21). The camshaft (22) is inserted into the housing (11) and abuts against the hydraulic cylinder body (12).

10. The hydraulic door leaf hinge according to claim 9, characterized in that: A first buffer pad (124) is installed at one end of the hydraulic cylinder body (12) close to the camshaft (22), and a second buffer pad (23) is installed at the top of the camshaft (22).

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