Hydraulic damping structure

Abstract

The utility model discloses a hydraulic damping structure which comprises an oil sealing block and a valve rod, the oil sealing block is arranged in a sliding mode, a through hole is formed in the oil sealing block, and the oil sealing block is connected with the valve rod in a sliding mode through the through hole. The first flow guide groove is used for guiding hydraulic oil to flow from one side of the oil sealing block to the other side of the oil sealing block and is formed in one of the circumferential outer side of the valve rod or the inner wall of the through hole, and the section volume of the first flow guide groove is variable in the flowing direction of the hydraulic oil. The service life of the damping structure can be greatly prolonged, and the effect of buffering speed micro-regulation is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of buffer damping, in particular to a hydraulic damping structure. Background Art

[0002] The hinge structure of some doors uses damping hinges, which can achieve a buffering function during the closing process of the door leaf.

[0003] Structurally, the damping hinge includes a first page plate, a second page plate and a damping cylinder. The damping cylinder includes a cylinder barrel, a piston, a rotating shaft and a compression spring. The piston is arranged in the cylinder barrel. The piston separates the interior of the cylinder barrel into an upper cavity and a lower cavity. The piston is also provided with a first oil hole for connecting the upper cavity and the lower cavity. The lower end of the cylinder barrel is connected to a speed regulating valve needle. The speed regulating valve needle is provided with a narrowing section and is inserted into the first oil hole. The narrowing section can be conical. The piston and the cylinder barrel are linearly slidably matched, the rotating shaft and the piston screw are driven, the upper end of the rotating shaft extends out of the cylinder barrel, the compression spring is crimped on the upper end of the piston, and the first page plate and the second page plate are fixedly connected to the rotating shaft and the cylinder barrel respectively.

[0004] When closing the door, the piston moves downward, so that the conical narrowing section on the speed regulating valve needle cooperates with the first oil hole. The hydraulic oil can flow from the lower cavity to the upper cavity through the gap between the narrowing section and the first oil hole, thereby achieving door closing buffering.

[0005] However, during the up and down movement of the existing piston, there is a large gap between the conical narrowing section on the speed regulating valve needle and the first oil hole, the speed regulating valve needle swings greatly, the speed regulating valve needle and the piston are in line or point contact, the speed regulating valve needle and the piston are severely worn, and the service life of the damping hinge is not high. Utility Model Content

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a hydraulic damping structure, which can greatly increase the service life of the damping structure and achieve the effect of fine-tuning the buffering speed.

[0007] According to a first aspect of the utility model, a hydraulic damping structure includes an oil sealing block and a valve stem, wherein the oil sealing block can be slidably arranged, and the oil sealing block is provided with a through hole, and the oil sealing block is slidably connected to the valve stem through the through hole; a first guide groove is used to guide the hydraulic oil to flow from one side of the oil sealing block to the other side, and is arranged on one of the circumferential outer side of the valve stem or the inner wall of the through hole, and its cross-sectional volume is variable along the flow direction of the hydraulic oil.

[0008] A hydraulic damping structure according to an embodiment of the utility model has at least the following beneficial effects:

[0009] 1. The utility model provides an oil sealing block and a valve stem, and the oil sealing block is slidably connected to the valve stem through a through hole, so as to ensure smooth sliding of the oil sealing block and reduce the deflection of the valve stem caused by the sliding of the oil sealing block. In addition, the through hole of the valve stem and the oil sealing block are in surface contact and sliding cooperation, so the friction force is small, so that the wear of the valve stem is small, and the problem of serious wear of the damping structure caused by the traditional use of a tapered valve stem is avoided, thereby greatly improving the service life of the damping structure.

[0010] 2. The utility model sets a first guide groove, and the cross-sectional volume of the first guide groove is variable along the flow direction of the hydraulic oil. Therefore, during the sliding cooperation between the oil sealing block and the valve stem, the amount of hydraulic oil flowing through the first guide groove can be controlled, and the damping force can be changed, thereby achieving the effect of fine-tuning the door closing buffer speed.

[0011] According to some embodiments of the utility model, the valve stem comprises a cylindrical rod, the outer diameter of the cylindrical rod is matched with the inner diameter of the through hole, and the first guide groove is arranged on the circumferential outer side of the cylindrical rod.

[0012] According to some embodiments of the present invention, the first guide groove is at least one of a straight groove extending linearly along the length direction of the cylindrical rod, a spiral groove extending spirally along the circumferential outer side of the cylindrical rod, and the straight groove and the spiral groove connected to each other.

[0013] According to some embodiments of the utility model, the cylindrical rod has a closed section, the closed section is located at one end of the first guide groove, and the closed section cooperates with the through hole to prevent the hydraulic oil from flowing from one side of the oil sealing block to the other side.

[0014] According to some embodiments of the present invention, a second guide groove is further included, wherein the second guide groove is arranged on the cylindrical rod and extends in a direction away from the closed section.

[0015] According to some embodiments of the present utility model, the cylindrical rod is coaxially connected to a connecting rod, the diameter of the connecting rod is smaller than the diameter of the cylindrical rod, and the first guide groove extends to the connecting rod.

[0016] According to some embodiments of the present invention, the depth of the first guide groove is variable along its extension direction so as to change the cross-sectional volume of the first guide groove that allows hydraulic oil to flow through.

[0017] According to some embodiments of the utility model, the oil sealing block is further provided with a one-way channel, and a one-way ball valve is provided in the one-way channel.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 This is a structural schematic diagram of a hydraulic damping structure according to an embodiment of the utility model;

[0021] Figure 2 for Figure 1 A schematic structural diagram of an embodiment of a hydraulic damping structure is shown;

[0022] Figure 3 for Figure 1 A schematic structural diagram of another embodiment of a hydraulic damping structure is shown;

[0023] Figure 4 for Figure 1 An exploded view of a hydraulic damping structure is shown.

[0024] Figure numerals: 100 - oil sealing block, 110 - valve stem, 120 - through hole, 130 - first guide groove, 140 - cylindrical rod, 150 - straight groove, 160 - closed section, 170 - second guide groove, 180 - connecting rod, 190 - one-way channel, 200 - one-way ball valve, 240 - spiral groove. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] A hydraulic damping structure according to an embodiment of the utility model is described below in conjunction with the accompanying drawings.

[0030] Reference Figure 1 A hydraulic damping structure of an embodiment of the utility model can be arranged in the hydraulic cylinder of the hinge to achieve a buffering function during the closing process of the door leaf.

[0031] Reference Figure 1 A hydraulic damping structure according to an embodiment of the utility model comprises an oil sealing block 100 and a valve stem 110. The oil sealing block 100 is slidably arranged, and the oil sealing block 100 is provided with a through hole 120. The oil sealing block 100 is slidably connected to the valve stem 110 through the through hole 120.

[0032] It can be understood that the oil sealing block 100 and the valve stem 110 are arranged in the hydraulic cylinder, the lower side of the oil sealing block 100 forms a lower cavity, and the upper side of the oil sealing block 100 forms an upper cavity, and both the upper cavity and the lower cavity are used to contain hydraulic oil.

[0033] In order to realize the buffering function during the closing process of the door leaf, the hydraulic damping structure also includes a first guide groove 130, which is used to guide the hydraulic oil to flow from one side of the oil sealing block 100 to the other side. The first guide groove 130 is arranged on the circumferential outer side of the valve stem 110 or one of the inner walls of the through hole 120, and its cross-sectional volume can be variably set along the flow direction of the hydraulic oil.

[0034] It should be noted that, during the closing process of the door leaf, the oil sealing block 100 slides downward, the volume of the lower chamber becomes smaller, the first guide groove 130 is in a conducting state, and the hydraulic oil flows from the lower chamber to the upper chamber through the first guide groove 130, thereby achieving the effect of fine-tuning the closing buffer speed.

[0035] It is understandable that the first guide groove 130 can be disposed on the circumferential outer side of the valve stem 110 , or on the inner wall of the through hole 120 .

[0036] In some embodiments of the present invention, the valve stem 110 has a cylindrical rod 140 , the outer diameter of the cylindrical rod 140 is matched with the inner diameter of the through hole 120 , and the first guide groove 130 is disposed on the circumferential outer side of the cylindrical rod 140 .

[0037] Therefore, the cylindrical rod 140 and the through hole 120 of the oil sealing block 100 can be in a transition fit relationship, so that the friction force during the sliding process of the valve stem 110 and the oil sealing block 100 is small, and the wear of the valve stem 110 is small.

[0038] In some specific embodiments of the present invention, the first guide groove 130 is at least one of a straight groove 150 extending linearly along the length direction of the cylindrical rod 140, a spiral groove 210 extending spirally along the circumferential outer side of the cylindrical rod 140, and interconnected straight grooves 150 and spiral grooves 210.

[0039] It is understandable that, referring to Figure 2 and Figure 3 The first guide groove 130 may be a straight groove 150, a spiral groove 210, or a straight groove 150 and a spiral groove 210 connected to each other, thereby satisfying the buffering effect required by the design.

[0040] It should be noted that the straight groove 150 and the spiral groove 210 can be processed by turning or milling, which is simple to process and has low manufacturing cost.

[0041] In a further embodiment of the present invention, the cylindrical rod 140 has a closed section 160 located at one end of the first guide groove 130 , and the closed section 160 cooperates with the through hole 120 to prevent the hydraulic oil from flowing from one side to the other side of the oil sealing block 100 .

[0042] During the door opening process, the oil sealing block 100 slides upward, so that the sealing section 160 is located in the through hole 120 of the oil sealing block 100 . The sealing section 160 can prevent the hydraulic oil from flowing from the lower chamber to the upper chamber through the first guide groove 130 .

[0043] In a further embodiment of the present invention, a second guide groove 170 is further included. The second guide groove 170 is disposed on the cylindrical rod 140 and extends in a direction away from the closed section 160 .

[0044] The oil sealing block 100 slides upward, so that the second guide groove 170 is in a conducting state, and the volume of the upper chamber becomes smaller, and the hydraulic oil flows from the upper chamber to the lower chamber through the second guide groove 170.

[0045] In a further embodiment of the present invention, referring to Figure 4 The cylindrical rod 140 is coaxially connected to a connecting rod 180 , the diameter of the connecting rod 180 is smaller than the diameter of the cylindrical rod 140 , and the first guide groove 130 extends to the connecting rod 180 .

[0046] It can be understood that the diameter of the connecting rod 180 is smaller than the diameter of the cylindrical rod 140, which is beneficial to increase the volume of the liquid outlet end of the first guide groove 130, thereby facilitating the hydraulic oil to enter the first guide groove 130.

[0047] In some embodiments of the present invention, the depth of the first guide groove 130 is variable along its extension direction to change the cross-sectional volume of the first guide groove 130 that allows the hydraulic oil to flow through.

[0048] The first guide groove 130 can be easily processed by turning or milling to change the depth of the first guide groove 130, so that the processing cost of the first guide groove 130 is low.

[0049] In some embodiments of the present invention, the oil sealing block 100 is further provided with a one-way channel 190 , and a one-way ball valve 200 is provided in the one-way channel 190 .

[0050] Therefore, during the door closing process, the one-way ball valve 200 can close the one-way channel 190 , and during the door opening process, the one-way channel 190 is connected, and the hydraulic oil can flow from the upper chamber to the lower chamber through the one-way channel 190 .

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A hydraulic damping structure, characterized in that: The invention comprises an oil sealing block (100) and a valve stem (110), wherein the oil sealing block (100) is slidably arranged, the oil sealing block (100) is provided with a through hole (120), and the oil sealing block (100) is slidably connected to the valve stem (110) through the through hole (120); The first guide groove (130) is used to guide the hydraulic oil to flow from one side to the other side of the oil sealing block (100), and is arranged on the circumferential outer side of the valve stem (110) or on the inner wall of the through hole (120), and its cross-sectional volume can be variably arranged along the flow direction of the hydraulic oil.

2. A hydraulic damping structure according to claim 1, characterized in that: The valve stem (110) comprises a cylindrical rod (140), the outer diameter of the cylindrical rod (140) is matched with the inner diameter of the through hole (120), and the first guide groove (130) is arranged on the circumferential outer side of the cylindrical rod (140).

3. A hydraulic damping structure according to claim 2, characterized in that: The first guide groove (130) is at least one of a straight groove (150) extending linearly along the length direction of the cylindrical rod (140), a spiral groove (210) extending spirally along the circumferential outer side of the cylindrical rod (140), and the straight groove (150) and the spiral groove (210) connected to each other.

4. A hydraulic damping structure according to claim 2, characterized in that: The cylindrical rod (140) has a closed section (160), which is located at one end of the first guide groove (130). The closed section (160) cooperates with the through hole (120) to prevent hydraulic oil from flowing from one side of the oil sealing block (100) to the other side.

5. A hydraulic damping structure according to claim 4, characterized in that: It also includes a second guide groove (170), which is arranged on the cylindrical rod (140) and extends in a direction away from the closed section (160).

6. A hydraulic damping structure according to claim 2, characterized in that: The cylindrical rod (140) is coaxially connected to a connecting rod (180), the diameter of the connecting rod (180) is smaller than the diameter of the cylindrical rod (140), and the first guide groove (130) extends to the connecting rod (180).

7. A hydraulic damping structure according to claim 1, characterized in that: The depth of the first guide groove (130) is variable along its extension direction so as to change the cross-sectional volume of the first guide groove (130) that allows hydraulic oil to flow through.

8. The hydraulic damping structure according to claim 1, characterized in that: The oil sealing block (100) is also provided with a one-way channel (190), and a one-way ball valve (200) is provided in the one-way channel (190).

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