Hinge buffering device

Abstract

The utility model discloses a hinge buffering device which comprises a shell, a piston and a reducing oil needle. The shell is provided with an inner cavity, the outer wall of the inner cavity is sequentially sleeved with pressure storage cotton and an inner pipe, the inner pipe is made of abrasion-resistant materials, the inner cavity is provided with an upper opening, and a first oil passing hole communicating the pressure storage cotton with the inner cavity is formed in the side, located on the upper opening, of the inner pipe. The piston comprises a plunger portion in sliding fit with the inner pipe and a piston rod portion connected with the plunger portion and extending out of the upper opening, the plunger portion divides the inner cavity into an upper oil cavity and a lower oil cavity, a first ring groove is formed in the outer side of the plunger portion and provided with a first sealing ring, and the piston is provided with a blind hole oil duct and a second oil passing hole communicating the blind hole oil duct with the upper oil cavity. The plunger part is provided with a one-way valve; the variable-diameter oil needle is located at the bottom of the inner cavity and vertically arranged in the upward opening direction, and the variable-diameter oil needle is in clearance fit with the blind hole oil channel. Therefore, abrasion of the piston to the inner cavity can be effectively reduced, meanwhile, the oil leakage phenomenon caused by oil temperature rise is prevented, and the service life is prolonged.

Description

Technical Field

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

[0002] At present, the self-closing hinges and hinges on the market are equipped with hydraulic buffer cylinders, such as Chinese patent CN218913340U, which can achieve non-uniform motion, so that the matching door leaf can achieve non-uniform motion when closing, which brings convenience to users. However, during use, the piston and the inner cavity will wear out. In addition, when the oil temperature rises, it will expand and cause oil leakage. In serious cases, the door cannot be opened or closed. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a hinge buffer device, which can effectively reduce the wear of the piston on the inner cavity, prevent oil leakage caused by the increase of oil temperature, and increase the service life.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A hinge buffer device, comprising

[0006] The shell has an inner cavity, the outer wall of the inner cavity is sequentially sleeved with pressure storage cotton and an inner tube, the inner tube is made of wear-resistant material, the inner cavity is provided with an upper opening, and the inner tube is provided with a first oil hole connecting the pressure storage cotton and the inner cavity at one side of the upper opening;

[0007] The piston comprises a plunger portion that is slidably matched with the inner tube, and a plug rod portion that is connected to the plunger portion and extends out of the upper opening, the plunger portion divides the inner cavity into an upper oil cavity and a lower oil cavity, a first annular groove is provided on the outer side of the plunger portion, and a first sealing ring is provided in the first annular groove, the piston is provided with a blind hole oil passage, and a second oil hole that communicates the blind hole oil passage and the upper oil cavity, and the plunger portion is provided with a one-way valve, and the direction of the one-way valve is from the upper oil cavity to the lower oil cavity;

[0008] A variable diameter oil needle is located at the bottom of the inner cavity and is vertically arranged toward the upper opening, and the variable diameter oil needle is clearance-matched with the blind hole oil passage.

[0009] According to a hinge buffer device of the embodiment of the utility model, at least the following beneficial effects are achieved: when closing the door, the reset part on the door leaf provides an external force to push the plug rod part to move downward, thereby causing the plunger part to move downward. Because the direction of the one-way valve is from the upper oil chamber to the lower oil chamber, the hydraulic oil in the lower oil chamber can only flow from the gap between the variable-diameter oil needle and the blind hole oil passage through the second oil hole to the upper oil chamber. Since the diameter of the variable-diameter oil needle is variable, the gap between the variable-diameter oil needle and the blind hole oil passage also changes, so it can achieve non-uniform door closing and play a buffering role. When opening the door, the door leaf drives the piston to move upward through the plug rod part, and the hydraulic oil in the upper oil chamber mainly flows to the lower oil chamber through the one-way valve. During the whole process, the piston slides with the inner tube, and the inner tube is made of wear-resistant material, so it can effectively reduce the wear caused by the piston on the inner chamber. At the same time, the first oil hole and pressure storage cotton are set. When the hydraulic oil heats up and expands, excessive oil pressure will compress the pressure storage cotton, which plays a role in buffering the oil pressure, thereby preventing oil leakage caused by rising oil temperature and improving the service life.

[0010] According to some embodiments of the utility model, the shell is further provided with an outer cavity located above the inner cavity, the side wall of the outer cavity is provided with a spiral groove, and the top of the plug rod is provided with a guide pin that cooperates with the spiral groove.

[0011] Advantageously, in such a configuration, the piston can be driven to move up and down by the rotation of the housing during the door opening and closing process.

[0012] According to some embodiments of the utility model, a bearing is provided at the upper opening, a second annular groove is provided on the outer side of the bearing, and a second sealing ring is provided in the second annular groove.

[0013] It is beneficial to provide a bearing to realize the rotational connection between the plunger part and the upper opening, and to provide a second sealing ring to play a sealing role to prevent the hydraulic oil from passing through the side of the plunger part.

[0014] According to some embodiments of the utility model, the one-way valve includes a valve chamber arranged on the plunger part, and an oil baffle plate that cooperates with the gap of the valve chamber, the oil baffle plate is a flat surface on the side close to the upper oil chamber, and the oil baffle plate is a groove surface on the side close to the lower oil chamber, and the plane and the groove surface are provided with a channel for accommodating the passage of the variable diameter oil needle.

[0015] The benefit is that: the one-way valve is arranged in this way that when the plunger moves downward, the hydraulic oil pushes the oil baffle to move to the side of the lower oil chamber, and the hydraulic oil passes through the gap between the oil baffle and the valve chamber. When the plunger moves upward, the hydraulic oil pushes the oil baffle to the upper oil chamber through the groove surface. Since the side of the oil baffle close to the upper oil chamber is a flat surface, it acts as a blocking effect. The hydraulic pressure can only pass through the channel between the flat surface and the groove surface and the gap between the reducing oil needle. Therefore, the oil baffle acts as a one-way valve.

[0016] According to some embodiments of the utility model, a lower opening is further provided on the side of the inner cavity facing away from the upper opening, and a rear cover is provided at the lower opening.

[0017] Advantageously, the lower opening and the rear cover are provided to facilitate installation of the piston and the variable-diameter oil needle.

[0018] According to some embodiments of the utility model, an adjustable bolt is provided in the rear cover, the adjustable bolt is connected to the variable diameter oil needle close to the piston, and a hexagonal hole is provided on the side of the adjustable bolt facing away from the piston.

[0019] It is beneficial that the adjustable bolt is provided to install the reducer oil needle so that the position of the reducer oil needle can be adjusted by twisting the hexagon socket hole.

[0020] According to some embodiments of the utility model, the adjustable bolt is provided with a cylindrical mounting hole, the end of the variable diameter oil needle is provided with a spherical mounting portion, the spherical mounting portion is installed in the mounting hole, and the top of the mounting hole is riveted receiving port.

[0021] The benefit is that: the cylindrical mounting hole is installed in conjunction with the spherical mounting part of the reducer oil needle, so that the angle of the reducer oil needle can be adjusted in a small range, which is beneficial to the reducer oil needle and the blind hole oil channel, and the top riveted receiving port of the mounting hole effectively prevents the reducer oil needle from being separated from the adjustable bolt.

[0022] According to some embodiments of the utility model, a third annular groove is provided on the outer side of the rear cover, a third sealing ring is provided in the third annular groove, a fourth annular groove is provided on the outer side of the adjustable bolt, and a fourth sealing ring is provided in the fourth annular groove.

[0023] It is beneficial to provide a third sealing ring and a fourth sealing ring to play a sealing role and prevent the hydraulic oil from leaking from the rear cover and the adjustable bolt.

[0024] According to some embodiments of the present utility model, the variable diameter oil needle includes a tip portion, a thick diameter portion and a thin diameter portion.

[0025] The benefits are: setting the tip part is conducive to the installation of the reducer oil needle and the piston, setting the thick diameter part to have a slow hydraulic oil flow rate, which plays a buffering role in the front section of door opening, and setting the thin diameter part to have a fast hydraulic oil flow rate, which quickly closes the door in the rear section of door opening.

[0026] According to some embodiments of the utility model, the shell is provided with a spring sleeve on one side of the upper opening, a return spring and a connecting piece are provided in the spring sleeve, and the connecting piece abuts against the top end of the plug rod portion.

[0027] Advantageously, the spring sleeve abuts against the top end of the plug rod portion by providing a reset spring and an abutment member, so as to provide a reset force for closing the door after the door is opened, thereby achieving automatic and slow closing of the door.

[0028] 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

[0029] 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:

[0030] Figure 1 A schematic diagram of an embodiment of the utility model;

[0031] Figure 2 for Figure 1 Schematic diagram of the shell is shown;

[0032] Figure 3 for Figure 2 An enlarged schematic diagram of point A is shown.

[0033] Figure numerals: housing 100, inner cavity 110, pressure storage cotton 120, inner tube 130, first oil hole 140, piston 150, plunger part 160, plug rod part 170, upper oil chamber 180, lower oil chamber 190, first sealing ring 200, blind hole oil channel 210, second oil hole 220, variable diameter oil needle 230, outer cavity 240, spiral groove 250, guide pin 260, bearing 270, second sealing ring 280, valve cavity 290, oil baffle 300, groove surface 310, rear cover 320, adjustable bolt 330, hexagonal hole 340, mounting hole 350, spherical mounting part 360, third sealing ring 370, fourth sealing ring 380, tip part 390, large diameter part 400, small diameter part 410, spring sleeve 420, return spring 430, connecting part 440. DETAILED DESCRIPTION

[0034] 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.

[0035] 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.

[0036] 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.

[0037] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0038] Reference below Figure 1-Figure 3 A hinge buffer device is described in detail with a specific embodiment. It is worth noting that the following description is only an exemplary description and not a specific limitation of the utility model.

[0039] like Figure 1-Figure 3 As shown, a hinge buffer device includes a housing 100, a piston 150 and a variable diameter oil needle 230.

[0040] The housing 100 has an inner cavity 110, and the outer wall of the inner cavity 110 is sequentially sleeved with a pressure storage cotton 120 and an inner tube 130, the inner tube 130 is made of wear-resistant material, the inner cavity 110 is provided with an upper opening, and the inner tube 130 is provided with a first oil hole 140 connecting the pressure storage cotton 120 and the inner cavity 110 on one side of the upper opening; the piston 150 includes a plunger portion 160 that is slidably matched with the inner tube 130, and a plug rod portion 170 that is connected to the plunger portion 160 and extends out of the upper opening, and the plunger portion 160 divides the inner cavity 110 into an upper and a lower portion. The piston 150 is provided with a blind hole oil passage 210 and a second oil hole 220 connecting the blind hole oil passage 210 and the upper oil chamber 180. The piston 160 is provided with a one-way valve, and the direction of the one-way valve is from the upper oil chamber 180 to the lower oil chamber 190. The variable diameter oil needle 230 is located at the bottom of the inner cavity 110 and is vertically arranged in the direction of the upper opening, and the variable diameter oil needle 230 is clearance-matched with the blind hole oil passage 210. When closing the door, the reset part on the door leaf provides an external force to push the plug rod 170 downward, thereby causing the plunger 160 to move downward. Because the direction of the one-way valve is from the upper oil chamber 180 to the lower oil chamber 190, the hydraulic oil in the lower oil chamber 190 can only flow from the gap between the variable-diameter oil needle 230 and the blind hole oil passage 210 through the second oil hole 220 to the upper oil chamber 180. Since the diameter of the variable-diameter oil needle 230 is variable, the gap between the variable-diameter oil needle 230 and the blind hole oil passage 210 also changes, so it can achieve non-uniform door closing and play a buffering role. When opening the door, the door leaf drives the piston 150 upward through the plug rod 170, and the hydraulic oil in the upper oil chamber 180 mainly flows from the one-way valve to the lower oil chamber 190. During the whole process, the piston 150 slides with the inner tube 130, and the inner tube 130 is made of wear-resistant material, so it can effectively reduce the wear of the piston 150 on the inner chamber 110. At the same time, the first oil hole 140 and the pressure storage cotton 120 are provided. When the hydraulic oil expands due to temperature rise, the excessive oil pressure will compress the pressure storage cotton 120 to buffer the oil pressure, thereby preventing oil leakage caused by the increase in oil temperature and prolonging the service life.

[0041] like Figure 2 As shown, the housing 100 is further provided with an outer cavity 240 located above the inner cavity 110, and a spiral groove 250 is provided on the side wall of the outer cavity 240, and a guide pin 260 that cooperates with the spiral groove 250 is provided on the top of the plug rod portion 170. In this way, the piston 150 can be driven to move up and down by rotating the outer shell during the door opening and closing process. Specifically, a bearing 270 is provided at the upper opening, and a second annular groove is provided on the outer side of the bearing 270, and a second sealing ring 280 is provided in the second annular groove. The bearing 270 is provided to realize the rotational connection between the plunger portion 160 and the upper opening, and the second sealing ring 280 is provided to play a sealing role to prevent the hydraulic oil from passing through the side of the plunger portion 160.

[0042] like Figure 3As shown, the one-way valve includes a valve cavity 290 arranged in the plunger portion 160, and an oil baffle 300 that is gap-matched with the valve cavity 290. The side of the oil baffle 300 close to the upper oil cavity 180 is a flat surface, and the side of the oil baffle 300 close to the lower oil cavity 190 is a groove surface 310. The flat surface and the groove surface 310 are provided with a channel for accommodating the passage of the variable diameter oil needle 230. The one-way valve is arranged in this way that when the plunger part 160 moves downward, the hydraulic oil pushes the oil baffle 300 to move to the side of the lower oil chamber 190, and the hydraulic oil passes through the gap between the oil baffle 300 and the valve chamber 290. When the plunger part 160 moves upward, the hydraulic oil pushes the oil baffle 300 to the upper oil chamber 180 through the groove surface 310. Since the side of the oil baffle 300 close to the upper oil chamber 180 is a flat surface, it acts as a blocking effect. The hydraulic pressure can only pass through the channel between the flat surface and the groove surface 310 and the gap between the reducing oil needle 230. Therefore, the oil baffle 300 acts as a one-way valve.

[0043] like Figure 2 and Figure 3 As shown, the inner cavity 110 is further provided with a lower opening on the side opposite to the upper opening, and a rear cover 320 is provided at the lower opening. The lower opening and the rear cover 320 are provided to facilitate the installation of the piston 150 and the variable diameter oil needle 230. Further, an adjustable bolt 330 is provided in the rear cover 320, and the adjustable bolt 330 is connected to the variable diameter oil needle 230 on the side close to the piston 150, and a hexagon socket 340 is provided on the side of the adjustable bolt 330 opposite to the piston 150. The adjustable bolt 330 is provided to install the variable diameter oil needle 230, and the position of the variable diameter oil needle 230 can be adjusted by screwing the hexagon socket 340.

[0044] Specifically, Figure 3 As shown, the adjustable bolt 330 is provided with a cylindrical mounting hole 350, and the end of the variable oil needle 230 is provided with a spherical mounting portion 360, which is installed in the mounting hole 350, and the top riveted receiving opening of the mounting hole 350. The cylindrical mounting hole 350 is installed in cooperation with the spherical mounting portion 360 of the variable oil needle 230, so that the angle of the variable oil needle 230 can be adjusted in a small range, which is beneficial to the variable oil needle 230 and the blind hole oil channel 210, and the top riveted receiving opening of the mounting hole 350 effectively prevents the variable oil needle 230 from being separated from the adjustable bolt 330. In addition, the outer side of the rear cover 320 is provided with a third annular groove, and the third annular groove is provided with a third sealing ring 370, and the outer side of the adjustable bolt 330 is provided with a fourth annular groove, and the fourth annular groove is provided with a fourth sealing ring 380. The third sealing ring 370 and the fourth sealing ring 380 are provided to play a sealing role to prevent the hydraulic oil from leaking from the rear cover 320 and the adjustable bolt. It should be noted that the variable diameter oil needle 230 includes a tip portion 390, a thick diameter portion 400 and a thin diameter portion 410. The tip portion 390 is provided to facilitate the installation of the variable diameter oil needle 230 and the piston 150, the thick diameter portion 400 is provided with a slow hydraulic oil flow rate, which plays a buffering role in the front section of the door opening, and the thin diameter portion 410 is provided with a fast hydraulic oil flow rate, which quickly closes the door in the rear section of the door opening.

[0045] It is worth mentioning that Figure 1 As shown, the housing 100 is provided with a spring sleeve 420 at one side of the upper opening, and a return spring 430 and a connecting member 440 are provided in the spring sleeve 420, and the connecting member 440 abuts against the top of the plug rod portion 170. The spring sleeve 420 abuts against the top of the plug rod portion 170 by providing a return spring 430 and an abutting member, so as to provide a return force for closing the door after opening the door, thereby realizing automatic slow closing of the door.

[0046] 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 hinge buffer device, characterized in that: include: The housing (100) comprises an inner cavity (110), the outer wall of the inner cavity (110) is sequentially sleeved with pressure storage cotton (120) and an inner tube (130), the inner tube (130) is made of wear-resistant material, the inner cavity (110) is provided with an upper opening, and the inner tube (130) is provided with a first oil hole (140) on one side of the upper opening, which is connected with the pressure storage cotton (120) and the inner cavity (110); The piston (150) comprises a plunger portion (160) which is slidably matched with the inner tube (130), and a plug rod portion (170) which is connected to the plunger portion (160) and extends out of the upper opening, the plunger portion (160) divides the inner cavity (110) into an upper oil cavity (180) and a lower oil cavity (190), a first annular groove is provided on the outer side of the plunger portion (160), and a first sealing ring (200) is provided in the first annular groove, the piston (150) is provided with a blind hole oil passage (210), and a second oil hole (220) which communicates with the blind hole oil passage (210) and the upper oil cavity (180), and the plunger portion (160) is provided with a one-way valve, and the direction of the one-way valve is from the upper oil cavity (180) to the lower oil cavity (190); The variable diameter oil needle (230) is located at the bottom of the inner cavity (110) and is vertically arranged toward the upper opening. The variable diameter oil needle (230) is clearance-matched with the blind hole oil passage (210).

2. A hinge buffer device according to claim 1, characterized in that: The housing (100) is further provided with an outer cavity (240) located above the inner cavity (110), a spiral groove (250) is provided on the side wall of the outer cavity (240), and a guide pin (260) cooperating with the spiral groove (250) is provided on the top of the plug rod portion (170).

3. A hinge buffer device according to claim 2, characterized in that: A bearing (270) is provided at the upper opening, a second annular groove is provided on the outer side of the bearing (270), and a second sealing ring (280) is provided in the second annular groove.

4. A hinge buffer device according to claim 1, characterized in that: The one-way valve comprises a valve cavity (290) arranged in the plunger portion (160), and an oil baffle (300) which is clearance-matched with the valve cavity (290); the side of the oil baffle (300) close to the upper oil cavity (180) is a flat surface, and the side of the oil baffle (300) close to the lower oil cavity (190) is a groove surface (310); the flat surface and the groove surface (310) are provided with a channel for accommodating the passage of the variable diameter oil needle (230).

5. The hinge buffer device according to claim 1, characterized in that: The inner cavity (110) is also provided with a lower opening on a side facing away from the upper opening, and a rear cover (320) is provided at the lower opening.

6. A hinge buffer device according to claim 5, characterized in that: An adjustable bolt (330) is provided in the rear cover (320), and the adjustable bolt (330) is connected to the variable diameter oil needle (230) on the side close to the piston (150), and a hexagonal hole (340) is provided on the side of the adjustable bolt (330) facing away from the piston (150).

7. A hinge buffer device according to claim 6, characterized in that: The adjustable bolt (330) is provided with a cylindrical mounting hole (350), the end of the variable diameter oil needle (230) is provided with a spherical mounting portion (360), the spherical mounting portion (360) is installed in the mounting hole (350), and the top of the mounting hole (350) is riveted to a receiving opening.

8. The hinge buffer device according to claim 6, characterized in that: A third annular groove is provided on the outer side of the rear cover (320), and a third sealing ring (370) is provided on the third annular groove. A fourth annular groove is provided on the outer side of the adjustable bolt (330), and a fourth sealing ring (380) is provided on the fourth annular groove.

9. The hinge buffer device according to claim 1, characterized in that: The variable diameter oil needle (230) comprises a tip portion (390), a large diameter portion (400) and a small diameter portion (410).

10. The hinge buffer device according to claim 1, characterized in that: The housing (100) is provided with a spring sleeve (420) at one side of the upper opening, a return spring (430) and a connecting piece (440) are provided in the spring sleeve (420), and the connecting piece (440) abuts against the top end of the plug rod (170).

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