Variable-speed damper

Abstract

The utility model discloses a variable speed damper which comprises a cylinder body and a piston, the piston is arranged in the cylinder body in a sliding mode, the interior of the cylinder body is divided into a first cavity and a second cavity by the piston, and the first cavity and the second cavity are sequentially arranged in the depth direction of the cylinder body. The oil guide groove and the oil discharge cavity are formed in the inner wall of the cylinder body and are sequentially arranged in the depth direction of the cylinder body. An oil guide channel is formed between the inner wall of the oil guide groove and the radial outer surface of the piston and used for guiding fluid to flow from the second cavity to the first cavity. An oil discharge channel is formed between the inner wall of the oil discharge cavity and the radial outer surface of the piston and used for discharging fluid from the second cavity to the first cavity, and the flow of the oil discharge channel is larger than that of the oil guide channel. The damper can achieve different damping forces, and is simple in structure, low in machining and manufacturing difficulty, durable and long in service life.

Description

Technical Field

[0001] The utility model relates to the technical field of dampers, in particular to a speed-changing damper. Background Art

[0002] The hydraulic damper can be used as an important component for hinge opening and closing buffering. The existing hydraulic damper includes a cylinder, a piston and an oil needle. The piston is slidably arranged in the cylinder, and the piston divides the interior of the cylinder into two oil chambers. The piston is provided with an oil hole, which connects the two oil chambers. The oil needle is inserted into the oil hole, and the oil needle is used to control the amount of oil flowing through the oil hole. A seal is provided on the outer periphery of the piston. The piston is sealed and slidably connected to the inner wall of the cylinder through the seal to prevent the fluid from passing through the gap between the inner wall of the cylinder and the outer periphery of the piston.

[0003] The oil needle is provided with damping parts of different diameters in sequence along the length direction. The oil hole cooperates with the damping parts of different diameters to control the fluid flow through the oil hole. Different damping forces can be achieved when the hydraulic damper is buffering.

[0004] However, the structure of the existing hydraulic damper has the following disadvantages:

[0005] 1. The inner wall of the oil cylinder is in contact with the seal, which is easy to be damaged, affecting the stability of the oil system and easily causing the damper to fail.

[0006] 2. The hydraulic damper has many parts and a complex structure. It is difficult to process and manufacture the parts and assemble them, which greatly increases the cost of the damper.

[0007] 3. After the existing hydraulic damper slows down the closing speed of doors and windows, the hinges are not strong enough to push the doors and windows closed, making it easy for the door locks to be difficult to close. Utility Model Content

[0008] 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 variable speed damper, which can achieve different damping forces, has a simple structure, is easy to process and manufacture, is durable and has a long service life.

[0009] A variable speed damper according to the first aspect of the utility model embodiment comprises a cylinder body and a piston, the piston is slidably arranged inside the cylinder body, the piston divides the interior of the cylinder body into a first chamber and a second chamber, the first chamber and the second chamber are arranged sequentially along the depth direction of the cylinder body, and is characterized in that it comprises an oil guide groove and an oil drain chamber, the oil guide groove and the oil drain chamber are arranged on the inner wall of the cylinder body, and are arranged sequentially along the depth direction of the cylinder body; an oil guide channel is formed between the inner wall of the oil guide groove and the radial outer surface of the piston, the oil guide channel is used to guide the fluid to flow from the second chamber to the first chamber; an oil drain channel is formed between the inner wall of the oil drain chamber and the radial outer surface of the piston, the oil drain channel is used to discharge the fluid from the second chamber to the first chamber, and the flow rate of the oil drain channel is greater than the flow rate of the oil guide channel.

[0010] A variable speed damper according to an embodiment of the utility model has at least the following beneficial effects:

[0011] 1. The utility model provides an oil guide groove, which is provided on the inner wall of the cylinder body. The oil guide groove cooperates with the radial outer surface of the piston to form an oil guide channel. The piston moves to the depth of the cylinder body under the action of external force, so that the fluid flows from the second chamber to the first chamber through the oil guide channel to realize the damping force of the damper, thereby slowing down the movement speed of the piston. There is no need to use the traditional method of setting an oil needle to realize the damping force, and there is no need to connect the piston to the cylinder body through a sealing ring, which avoids the friction damage of the sealing ring during the movement of the piston and improves the service life of the damper.

[0012] 2. The utility model sets an oil drain chamber with a larger space to accommodate more fluid. When the piston is subjected to external force, it continues to move deeper into the cylinder body. The oil drain chamber cooperates with the radial outer surface of the piston to form an oil drain passage. The fluid quickly passes through the oil drain passage and enters the first chamber. The fluid in the first chamber increases rapidly. Under the pressure of the first chamber, the piston obtains a greater speed and accelerates its movement instantaneously, thereby making it easier for the hinges or hinges to close the doors, windows and flaps in place, or helping the locks of the doors and windows to get stuck in the holes of the door frame, thus solving the problem of incomplete closing.

[0013] 3. The utility model sets an oil guide groove and an oil discharge chamber. When the piston moves to the deep part of the cylinder body under the action of external force, the piston passes the position of the oil guide groove, and the fluid flows into the first chamber through the guide channel, so that the piston moves slowly. The piston passes the position of the oil discharge chamber, and the fluid is discharged to the first chamber through the oil discharge channel. The piston instantly obtains a larger speed. Therefore, the damper realizes the effect of first deceleration and then acceleration when the hinge or hinge is closed, thereby making the closing of doors, windows and flip covers more in line with the realization requirements.

[0014] 4. Compared with the existing dampers, the utility model realizes the function of buffering speed changes, greatly simplifies the damping structure, reduces the number of parts, makes processing and manufacturing easier, assembles more conveniently, and greatly increases the service life.

[0015] According to some embodiments of the utility model, the inner wall of the cylinder body has an oil sealing surface, and the oil sealing surface is located between the oil guide groove and the oil discharge chamber. The oil sealing surface matches the radial outer surface of the piston, and a flow limiting channel is formed between the oil sealing surface and the radial outer surface of the piston. The flow limiting channel is used to limit the flow of fluid from the second chamber to the first chamber, and the flow rate of the flow limiting channel is smaller than the flow rate of the oil guide channel.

[0016] According to some embodiments of the present utility model, the oil discharge chamber has an expansion section, and the cross-sectional area of ​​the expansion section gradually increases along the depth direction of the cylinder body.

[0017] According to some embodiments of the utility model, a positioning surface is provided on the inner wall of the cylinder body, the positioning surface matches the radial outer surface of the piston and is located on the side of the oil discharge chamber away from the oil guide groove, the oil discharge chamber has a connecting section, one side of the connecting section is connected to the expansion section, and the other side of the connecting section is connected to the positioning surface.

[0018] According to some embodiments of the utility model, there is one oil drainage chamber, and the oil drainage chamber extends in a circular shape along the circumference of the inner wall of the cylinder body; or, there are multiple oil drainage chambers, and the multiple oil drainage chambers are distributed along the circumference of the inner wall of the cylinder body.

[0019] According to some embodiments of the present utility model, the oil guide groove is at least one of a straight groove extending linearly along the depth direction of the cylinder body, a spiral groove extending spirally along the circumference of the inner wall of the cylinder body, and the straight groove and the spiral groove connected to each other.

[0020] According to some embodiments of the present invention, a spring is further included. The spring is located inside the cylinder body and is used to drive the piston to move toward the first chamber.

[0021] According to some embodiments of the utility model, the piston is provided with a push rod, a radial outer surface of the push rod is sleeved with a seal, and the push rod is sealed and connected to the inner wall of the cylinder body through the seal.

[0022] According to some embodiments of the present invention, a stabilizing ring is further included. The stabilizing ring is located on a side of the sealing member away from the piston. The stabilizing ring is sleeved on a radial outer surface of the push rod to stabilize the push rod in the cylinder body.

[0023] According to some embodiments of the present invention, a clamping piece is further included. The clamping piece is located on a side of the stabilizing ring away from the sealing piece. A clamping groove is provided on the inner wall of the cylinder body. The clamping piece is clamped with the clamping groove to prevent the stabilizing ring from escaping from the inside of the cylinder body.

[0024] 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

[0025] 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:

[0026] Figure 1 It is a structural schematic diagram of a speed-changing damper according to an embodiment of the utility model;

[0027] Figure 2 for Figure 1 A schematic structural diagram of the buffering operation of a variable speed damper is shown;

[0028] Figure 3 for Figure 1 A schematic structural diagram of a piston reset of a variable speed damper is shown;

[0029] Figure 4 for Figure 1 A schematic structural diagram of a cylinder body of a variable speed damper is shown.

[0030] Reference numerals:

[0031] 100-cylinder body, 110-first chamber, 120-second chamber, 130-oil guide groove, 140-oil discharge chamber, 141-expansion section, 142-connection section, 150-oil sealing surface, 160-positioning surface, 170-card slot;

[0032] 200-piston, 210-push rod, 220-oil return channel;

[0033] 300-control parts;

[0034] 400-spring;

[0035] 500-seals;

[0036] 600-stabilizing ring;

[0037] 700-Clamping parts. DETAILED DESCRIPTION

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] A variable speed damper according to an embodiment of the utility model is described below in conjunction with the accompanying drawings.

[0043] Reference Figure 1 A variable speed damper according to an embodiment of the utility model comprises a cylinder 100 and a piston 200. The piston 200 is slidably disposed inside the cylinder 100. The piston 200 divides the interior of the cylinder 100 into a first chamber 110 and a second chamber 120. The first chamber 110 and the second chamber 120 are arranged in sequence along the depth direction of the cylinder 100. Fluid is injected into the cylinder 100, and the fluid may be hydraulic oil, water or gas.

[0044] Furthermore, the variable speed damper also includes an oil guide groove 130 and an oil drain chamber 140, which are arranged on the inner wall of the cylinder body 100 and are arranged sequentially along the depth direction of the cylinder body 100. An oil guide channel is formed between the inner wall of the oil guide groove 130 and the radial outer surface of the piston 200, and the oil guide channel is used to guide the fluid to flow from the second chamber 120 to the first chamber 110. An oil drain channel is formed between the inner wall of the oil drain chamber 140 and the radial outer surface of the piston 200, and the oil drain channel is used to discharge the fluid from the second chamber 120 to the first chamber 110, and the flow rate of the oil drain channel is greater than the flow rate of the oil guide channel.

[0045] Furthermore, the inner wall of the cylinder body 100 has an oil sealing surface 150, which is located between the oil guide groove 130 and the oil discharge chamber 140. The oil sealing surface 150 matches the radial outer surface of the piston 200, and a flow limiting channel is formed between the oil sealing surface 150 and the radial outer surface of the piston 200. The flow limiting channel is used to limit the flow of fluid from the second chamber 120 to the first chamber 110, and the flow rate of the flow limiting channel is smaller than the flow rate of the oil guide channel.

[0046] It should be noted that there is a clearance fit between the oil sealing surface 150 and the radial outer surface of the piston 200, that is, there is a very small gap between the oil sealing surface 150 and the radial outer surface of the piston 200, and the gap is a flow limiting channel. Therefore, when the piston 200 moves to the position where the oil sealing surface 150 is located, only a small amount of fluid passes through the limiting channel. At this time, the movement speed of the piston 200 reaches the slowest and the damping force of the damper is also the largest, thereby preventing doors, windows and flip covers from closing too quickly.

[0047] The stroke of the piston 200 passing through the oil seal can be flexibly designed according to the actual use requirements of the damper.

[0048] It is understandable that, referring to Figure 2 When the piston 200 moves to the depth of the cylinder body 100 under the action of external force, an oil guide channel is formed between the inner wall of the oil guide groove 130 and the radial outer surface of the piston 200. The oil guide channel is used to guide the fluid to flow from the second chamber 120 to the first chamber 110. At this time, the movement speed of the piston 200 is slow, and a flow limiting channel is formed between the oil sealing surface 150 and the radial outer surface of the piston 200. The flow limiting channel limits the flow of fluid from the second chamber 120 to the first chamber 110. At this time, the movement speed of the piston 200 is the slowest. Finally, an oil discharge channel is formed between the inner wall of the oil discharge chamber 140 and the radial outer surface of the piston 200. The oil discharge channel discharges the fluid from the second chamber 120 to the first chamber 110. At this time, the piston 200 instantly obtains a larger speed, thereby completing the closing of the hinge.

[0049] In some embodiments of the present invention, the oil guide groove 130 is at least one of a straight groove extending linearly along the depth direction of the cylinder body 100, a spiral groove extending spirally along the circumference of the inner wall of the cylinder body 100, and a straight groove and a spiral groove connected to each other.

[0050] Preferably, the oil guide groove 130 is a spiral groove (such as Figure 4 ), the spiral groove and the piston 200 radially cooperate to form a spiral oil guide channel. The oil guide channel is curved in shape. When the fluid passes through the oil guide channel, the inner wall of the spiral groove can generate greater resistance to the fluid, which helps to generate greater resistance to the fluid, thereby allowing the damper to generate a greater damping force.

[0051] Then, according to actual design requirements, the oil guide groove 130 can be designed as a straight groove extending linearly along the depth direction of the cylinder body 100, or can be designed as a form in which the straight groove and the spiral groove are connected to each other.

[0052] It should be noted that, refer to Figure 4 The number of the oil drain chamber 140 is one, and the oil drain chamber 140 extends in a circular shape along the inner wall of the cylinder body 100. In this way, the space of the oil drain chamber 140 can be larger, and the oil drain chamber 140 can accommodate a larger amount of fluid. The fluid is discharged from the second chamber 120 to the first chamber 110 through the oil drain chamber 140, which can instantly increase the moving speed of the piston 200.

[0053] Of course, according to the requirement of oil discharge amount, the number of the oil discharge chambers 140 can be multiple, and the multiple oil discharge chambers 140 are distributed along the circumferential direction of the inner wall of the cylinder body 100 .

[0054] In some embodiments of the present invention, the oil discharge chamber 140 has an expansion section 141 , and the cross-sectional area of ​​the expansion section 141 gradually increases along the depth direction of the cylinder body 100 .

[0055] It can be understood that the shape of the expansion section 141 is a conical surface, or the shape of the expansion section 141 is a curved surface.

[0056] Preferably, the expansion section 141 is in the shape of a conical surface, so that the oil drain cavity 140 is easier to process.

[0057] Therefore, as the piston 200 moves deeper into the oil discharge chamber 140, the amount of oil discharged from the oil discharge chamber 140 gradually increases, which speeds up the movement of the piston 200, thereby making it easier for the hinges to close the doors, windows, and flaps, or to help the locks of the doors, windows, and flaps fit into the holes in the door frame.

[0058] In a further embodiment of the utility model, a positioning surface 160 is provided on the inner wall of the cylinder body 100, the positioning surface 160 matches the radial outer surface of the piston 200, and is located on the side of the oil discharge chamber 140 away from the oil guide groove 130, and the oil discharge chamber 140 has a connecting section 142, one side of the connecting section 142 is connected to the expansion section 141, and the other side of the connecting section 142 is connected to the positioning surface 160.

[0059] When the piston 200 moves to the position of the oil discharge chamber 140 , the positioning surface 160 can stabilize the piston 200 , prevent the piston 200 from swinging, and ensure the normal movement of the piston 200 .

[0060] It should be noted that there is a clearance fit between the positioning surface 160 and the radial outer surface of the piston 200 , and the fluid can pass through the gap formed between the positioning surface 160 and the radial outer surface of the piston 200 .

[0061] In some embodiments of the utility model, a control component 300 is included, and the piston 200 is provided with an oil return channel 220. The control component 300 is arranged in the oil return channel 220. The oil return channel 220 connects the first chamber 110 and the second chamber 120. The control component 300 is used to control the unidirectional flow of fluid from the second chamber 120 to the first chamber 110.

[0062] Specifically, the oil return channel 220 has a main circuit and at least one branch circuit that are connected. The main circuit is connected to the second chamber 120 , and the branch circuit is connected to the first chamber 110 . The control element 300 controls fluid conduction in the main circuit.

[0063] The control member 300 may be a steel ball or a valve body in other forms. Figure 3 The piston 200 is moved toward the first chamber 110 by the force, the steel ball falls, the main path is connected, and the fluid can flow from the first chamber 110 to the second chamber 120, thereby resetting the piston 200.

[0064] In some embodiments of the present invention, a spring 400 is further included. The spring 400 is located inside the cylinder body 100 . The spring 400 is used to drive the piston 200 to move toward the first chamber 110 .

[0065] Therefore, even if no external force acts on the piston 200 , the spring 400 can drive the piston 200 to move and reset.

[0066] In some embodiments of the present invention, the piston 200 is provided with a push rod 210, and a seal 500 is mounted on the radial outer surface of the push rod 210. The push rod 210 is sealed to the inner wall of the cylinder 100 through the seal 500, thereby preventing fluid leakage in the cylinder 100.

[0067] In a further embodiment of the present invention, a stabilizing ring 600 is further included. The stabilizing ring 600 is located on a side of the sealing member 500 away from the piston 200 . The stabilizing ring 600 is sleeved on a radial outer surface of the push rod 210 to stabilize the push rod 210 in the cylinder body 100 .

[0068] Therefore, the stabilizing ring 600 is sleeved on the radial outer surface of the push rod 210 , and the stabilizing ring 600 matches the inner surface of the cylinder body 100 , so that the push rod 210 is stabilized in the cylinder body 100 .

[0069] In a further embodiment of the utility model, a clamping member 700 is further included. The clamping member 700 is located on the side of the stabilizing ring 600 away from the sealing member 500. A clamping groove 170 is provided on the inner wall of the cylinder body 100. The clamping member 700 is clamped with the clamping groove 170 to prevent the stabilizing ring 600 from escaping from the inside of the cylinder body 100.

[0070] Therefore, the clamping member 700 may be a clamping spring, which is clamped with the clamping groove 170 to prevent the stabilizing ring 600 and the sealing ring from being separated from the cylinder body 100, thereby making the damper easier to assemble and less difficult to disassemble and repair.

[0071] 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.

[0072] 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 variable speed damper, comprising a cylinder (100) and a piston (200), wherein the piston (200) is slidably disposed inside the cylinder (100), and the piston (200) divides the interior of the cylinder (100) into a first chamber (110) and a second chamber (120), wherein the first chamber (110) and the second chamber (120) are arranged in sequence along the depth direction of the cylinder (100), characterized in that: It comprises an oil guide groove (130) and an oil drain chamber (140), wherein the oil guide groove (130) and the oil drain chamber (140) are arranged on the inner wall of the cylinder body (100) and are arranged in sequence along the depth direction of the cylinder body (100); An oil guide channel is formed between the inner wall of the oil guide groove (130) and the radial outer surface of the piston (200), and the oil guide channel is used to guide the fluid to flow from the second chamber (120) to the first chamber (110); An oil discharge passage is formed between the inner wall of the oil discharge chamber (140) and the radial outer surface of the piston (200), and the oil discharge passage is used to discharge the fluid from the second chamber (120) to the first chamber (110). The flow rate of the oil discharge passage is greater than the flow rate of the oil guide passage.

2. A variable speed damper according to claim 1, characterized in that: The inner wall of the cylinder body (100) has an oil sealing surface (150), and the oil sealing surface (150) is located between the oil guide groove (130) and the oil discharge chamber (140). The oil sealing surface (150) matches the radial outer surface of the piston (200), and a flow limiting channel is formed between the oil sealing surface (150) and the radial outer surface of the piston (200). The flow limiting channel is used to limit the flow of fluid from the second chamber (120) to the first chamber (110), and the flow rate of the flow limiting channel is smaller than the flow rate of the oil guide channel.

3. A variable speed damper according to claim 1, characterized in that: The oil discharge chamber (140) has an expansion section (141), and the cross-sectional area of ​​the expansion section (141) gradually increases along the depth direction of the cylinder body (100).

4. A variable speed damper according to claim 3, characterized in that: The inner wall of the cylinder body (100) is provided with a positioning surface (160), the positioning surface (160) matches the radial outer surface of the piston (200) and is located on the side of the oil discharge chamber (140) away from the oil guide groove (130), the oil discharge chamber (140) has a connecting section (142), one side of the connecting section (142) is connected to the expansion section (141), and the other side of the connecting section (142) is connected to the positioning surface (160).

5. A variable speed damper according to claim 1, characterized in that: There is one oil drain chamber (140), and the oil drain chamber (140) extends in an annular direction along the inner wall of the cylinder body (100); or there are multiple oil drain chambers (140), and the multiple oil drain chambers (140) are distributed in the circumferential direction along the inner wall of the cylinder body (100).

6. A variable speed damper according to claim 1, characterized in that: The oil guide groove (130) is at least one of a straight groove extending linearly in the depth direction of the cylinder body (100), a spiral groove extending spirally along the circumference of the inner wall of the cylinder body (100), and the straight groove and the spiral groove connected to each other.

7. A variable speed damper according to claim 1, characterized in that: It also includes a spring (400), wherein the spring (400) is located inside the cylinder body (100), and the spring (400) is used to drive the piston (200) to move toward the first chamber (110).

8. The variable speed damper according to claim 1, characterized in that: The piston (200) is provided with a push rod (210), a radial outer surface of the push rod (210) is sleeved with a seal (500), and the push rod (210) is sealedly connected to the inner wall of the cylinder body (100) through the seal (500).

9. A variable speed damper according to claim 8, characterized in that: It also includes a stabilizing ring (600), which is located on the side of the sealing member (500) away from the piston (200). The stabilizing ring (600) is sleeved on the radial outer surface of the push rod (210) to stabilize the push rod (210) in the cylinder body (100).

10. A variable speed damper according to claim 9, characterized in that: The invention also comprises a clamping member (700), wherein the clamping member (700) is located on a side of the stabilizing ring (600) away from the sealing member (500), and the inner wall of the cylinder body (100) is provided with a clamping groove (170), and the clamping member (700) is clamped with the clamping groove (170) to prevent the stabilizing ring (600) from being separated from the inside of the cylinder body (100).

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