CN218913340U - Speed-changing buffer oil cylinder - Google Patents

Abstract

The utility model discloses a speed-changing buffer oil cylinder, which comprises a shell and a piston, wherein the shell is provided with an inner cavity, the top of the shell is provided with an opening, and the bottom surface of the inner cavity is provided with a reducing oil needle which is vertically arranged towards the opening; the piston comprises a plunger portion movably matched with the inner cavity, and a plug rod portion connected with the plunger portion and extending out of the opening, the plunger portion divides the inner cavity into an upper oil cavity and a lower oil cavity, the piston is provided with a first oil duct communicated with the upper oil cavity and the lower oil cavity, a reducing oil needle is matched with the first oil duct, and a one-way valve is arranged on the plunger portion. When the door leaf of the speed-changing buffer oil cylinder is closed, the diameter of the variable-diameter oil needle is changed, so that non-uniform motion can be realized, and the matched door leaf can realize non-uniform motion when closed, thereby bringing convenience to users.

Description

Speed-changing buffer oil cylinder

Technical Field

The utility model relates to the field of hydraulic cylinders, in particular to a speed-changing buffer cylinder.

Background

The self-closing type hinge and the hinge on the current market can be matched with a hydraulic buffer oil cylinder, for example, the self-resetting oil cylinder used in China patent CN210888511U is under the same external force applied to a resetting part, the axial movement of a piston rod part is uniform speed movement, namely, a matched product is in a uniform speed closing state in the automatic closing process, the door leaf cannot be smoothly locked due to insufficient locking force when the door leaf is closed due to uniform speed slow closing, and the door leaf is slowly closed in the whole process, so that the closing time is too long.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the variable speed buffer oil cylinder can realize non-uniform motion, so that the matched door leaves can realize non-uniform motion when closed, and convenience is brought to users.

The technical scheme adopted for solving the technical problems is as follows:

the variable speed buffer oil cylinder comprises a shell and a piston, wherein the shell is provided with an inner cavity, the top of the shell is provided with an opening, and the bottom surface of the inner cavity is provided with a reducing oil needle which is vertically arranged towards the opening; the piston comprises a plunger portion movably matched with the inner cavity, and a plug rod portion connected with the plunger portion and extending out of the opening, the plunger portion divides the inner cavity into an upper oil cavity and a lower oil cavity, the piston is provided with a first oil duct communicated with the upper oil cavity and the lower oil cavity, a reducing oil needle is matched with the first oil duct, and a one-way valve is arranged on the plunger portion.

The speed-changing buffer oil cylinder provided by the embodiment of the utility model has at least the following beneficial effects: according to the difference of door leaf structure, accessible cock stem portion drives piston upward movement or down motion when the door leaf opens the door to the following explanation takes the door leaf to drive piston upward movement through cock stem portion when opening the door as an example, and the direction of check valve should set up to follow last oil pocket and lead to down the oil pocket this moment, and the hydraulic oil of last oil pocket mainly flows to down the oil pocket by the check valve, and the piston is in the upper portion of casing inner chamber this moment. When the door is closed, the reset part on the door leaf provides external force to push the plug rod part to move downwards so as to bring the plug rod part to move downwards, hydraulic oil in the lower oil cavity flows to the upper oil cavity from a gap between the variable-diameter oil needle and the port of the first oil duct, and as the diameter of the variable-diameter oil needle is changed, the gap between the variable-diameter oil needle and the port of the first oil duct is also changed, so that non-uniform motion can be realized, and the matched door leaf realizes non-uniform motion when being closed, thereby bringing convenience to a user, realizing faster door closing speed, realizing buffering effect when the middle section, enabling the door leaf to be closed smoothly with collision force when being closed, or enabling the door leaf to be closed quickly when being closed, realizing the mute closing of the door leaf when being closed, reducing closing time, enabling the door leaf to be difficult to run off at room temperature, and achieving the energy-saving effect.

If when the door is opened, the door leaf drives the piston to move downwards through the plug rod part, the direction of the one-way valve is opposite, hydraulic oil in the lower oil cavity mainly flows to the upper oil cavity through the one-way valve, the piston is positioned at the lower part of the inner cavity of the shell, when the door is closed, the reset part on the door leaf provides external force to push the plug rod part to move upwards so as to drive the plunger part to move upwards, hydraulic oil in the upper oil cavity flows to the lower oil cavity through a gap between the reducing oil needle and the port of the first oil duct, and the diameter of the reducing oil needle is changed, so that the gap between the reducing oil needle and the port of the first oil duct is also changed, and non-uniform motion can be realized.

According to some embodiments of the utility model, the first oil passage includes a blind hole oil passage extending from a bottom surface of the plunger portion to an inside of the plug stem portion, a side hole provided in a side surface of the plug stem portion in communication with the blind hole oil passage, and the reducing oil needle is fitted with the blind hole oil passage.

The beneficial effects are that: the first oil duct is reasonable in structure, is favorable for being matched with the reducing oil needle, and when the piston moves downwards, hydraulic oil in the lower oil cavity flows to the blind oil duct from a gap between the reducing oil needle and a port of the blind oil duct and flows to the upper oil cavity through the side hole.

According to some embodiments of the utility model, the plunger portion is provided with a collar step narrowing towards the blind-hole oil passage port, the collar step being provided with a through hole allowing the reducing oil needle to enter the blind-hole oil passage.

The beneficial effects are that: the convex ring step reduces the port of the blind hole oil duct, so that the oil pressure of the pressurized oil cavity can be improved, the buffer effect is improved, in addition, the distance between the through holes of the convex ring step is small, the hydraulic oil flow can be controlled according to the diameter change of the variable-diameter oil needle more accurately during the movement of the piston, and the speed can be controlled according to the change of the variable-diameter oil needle.

According to some embodiments of the utility model, the check valve is oriented such that the upper oil chamber opens into the lower oil chamber, and the diameter of the reducing oil needle increases from top to bottom.

The beneficial effects are that: therefore, when the door is closed, the reset part on the door leaf provides external force to push the plug rod part to move downwards so as to bring the plug rod part to move downwards, and the gap between the reducing oil needle and the blind hole oil duct port is also changed from large to small, so that the door leaf is closed quickly at the beginning of the closing section, the middle section is slightly slow, the rear section is closed slowly, the mute closing of the door leaf is realized, the closing time is reduced, the room temperature is not easy to run off, and the energy-saving effect is achieved.

According to some embodiments of the utility model, the reducing oil needle is divided into an upper section and a lower section, and an oil passage ring groove is formed in the periphery of the lower section.

The beneficial effects are that: therefore, the gap between the reducing oil needle and the port of the blind hole oil duct is reduced from large to small and then is enlarged, so that the door closing speed is high, the door is closed slowly in the middle section to realize the buffering effect, and the door leaf can be closed slightly quickly when being closed, so that the door leaf can be closed smoothly with impact force and locked.

According to some embodiments of the utility model, the opening is provided with a first sealing ring, which is in sliding engagement with the stem portion.

The beneficial effects are that: the first sealing ring is arranged to achieve a sealing effect, and hydraulic oil is prevented from flowing out from a gap between the opening and the plug rod portion.

According to some embodiments of the utility model, a sealing ring groove is formed in the periphery of the plunger portion, and a second sealing ring is arranged on the sealing ring groove.

The beneficial effects are that: the second sealing ring is arranged to achieve a sealing effect, so that hydraulic oil is prevented from passing through a gap between the plunger portion and the inner cavity.

According to some embodiments of the utility model, one of the top surface and the bottom surface of the plunger portion is provided with an oil passing hole which communicates with the bottom surface and the side surface of the sealing ring groove, the other of the top surface and the bottom surface of the plunger portion is provided with an oil returning channel which communicates with the side surface of the sealing ring groove, and the sealing ring groove, the second sealing ring, the oil passing hole and the oil returning channel form the one-way valve.

The beneficial effects are that: the check valve is arranged without adding additional parts, the oil passing hole is formed in the bottom surface of the plunger portion, the oil return channel is formed in the top surface of the plunger portion, and therefore when the piston moves upwards, hydraulic oil in the upper oil cavity enters from the oil return channel to push the second sealing ring to slide downwards, hydraulic oil can enter the lower oil cavity through the oil passing hole through the bottom surface of the sealing ring groove, when the piston moves downwards, hydraulic oil in the lower oil cavity enters from the oil passing hole to push the second sealing ring to slide upwards, and therefore the oil return channel on the side surface of the sealing ring groove is blocked, and hydraulic oil cannot pass.

According to some embodiments of the utility model, the check valve includes a valve cavity disposed in the plunger portion, a valve spool disposed within the valve cavity.

The beneficial effects are that: the check valve is simple in structure and stable in operation.

According to some embodiments of the utility model, the lower oil cavity is provided with a return spring sleeved on the reducing oil needle.

The beneficial effects are that: when the external force is withdrawn, the reset spring pushes the piston to move upwards to reset, and the fact that the driving force of the reset part matched with the hydraulic oil cylinder on the door leaf is much larger is needed to be explained, and the power output of the door closing process is hardly influenced by the spring force of the reset spring.

Drawings

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

FIG. 1 is a schematic diagram of a first embodiment of the present utility model;

FIG. 2 is a schematic view of the piston shown in FIG. 1;

FIG. 3 is a schematic diagram of a second embodiment of the present utility model;

FIG. 4 is a schematic structural view of the plunger portion shown in FIG. 3;

fig. 5 is a schematic structural view of a third embodiment of the present utility model.

Reference numerals: the oil pump comprises a shell 100, an inner cavity 110, an opening 120, a reducing oil needle 130, a piston 140, a plunger part 150, a plug rod part 160, an upper oil cavity 170, a lower oil cavity 180, a blind oil duct 190, a side duct 200, a convex ring step 210, a through hole 220, an oil duct ring groove 230, a first sealing ring 240, a sealing ring groove 250, a second sealing ring 260, an oil passing hole 270, an oil return duct 280, a valve cavity 290, a valve core 300 and a return spring 310.

Detailed Description

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

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

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

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

A shift shock cylinder according to an embodiment of the present utility model is described below with reference to the accompanying drawings.

Referring to fig. 1-2, a shift damping cylinder includes a housing 100 and a piston 140.

The shell 100 is provided with an inner cavity 110, an opening 120 is formed in the top of the inner cavity 110, and a reducing oil needle 130 which is vertically arranged towards the opening 120 is arranged on the bottom surface of the inner cavity 110; the piston 140 comprises a plunger portion 150 movably matched with the inner cavity 110, and a plug rod portion 160 connected with the plunger portion 150 and extending out of the opening 120, the plunger portion 150 divides the inner cavity 110 into an upper oil cavity 170 and a lower oil cavity 180, the piston 140 is provided with a first oil passage communicated with the upper oil cavity 170 and the lower oil cavity 180, the diameter-variable oil needle 130 is matched with the first oil passage, and the plunger portion 150 is provided with a one-way valve.

According to the different door leaf structure, the piston 140 can be driven to move upwards or downwards by the plug rod 160 when the door leaf is opened, and the door leaf can drive the piston 140 to move upwards by the plug rod 160 when the door leaf is opened, so that the direction of the check valve is set to be from the upper oil cavity 170 to the lower oil cavity 180, hydraulic oil in the upper oil cavity 170 mainly flows to the lower oil cavity 180 from the check valve, and the piston 140 is positioned at the upper part of the inner cavity 110 of the shell 100. When the door is closed, the reset part on the door leaf provides an external force to push the plug rod part 160 to move downwards so as to bring the plug rod part 150 to move downwards, hydraulic oil in the lower oil cavity 180 flows to the upper oil cavity 170 from a gap between the reducing oil needle 130 and the port of the first oil duct, and the diameter of the reducing oil needle 130 is changed, so that the gap between the reducing oil needle 130 and the port of the first oil duct is also changed, and non-uniform motion can be realized, so that the matched door leaf realizes non-uniform motion when being closed, convenience is brought to a user, the door leaf can be realized at a higher speed when being closed, the door leaf can be closed slowly to realize a buffering effect when being closed, the door leaf can be closed smoothly with collision force when being closed, or the door leaf can be closed quickly when being closed, the middle section is closed slowly, the door leaf is closed slowly, the mute closing of the door leaf is realized, the closing time is reduced, the room temperature is not easy to run off, and the energy-saving effect is realized.

If the door leaf drives the piston 140 to move downwards through the plug rod portion 160 when the door is opened, the direction of the check valve is opposite, hydraulic oil in the lower oil cavity 180 mainly flows to the upper oil cavity 170 through the check valve, at this time, the piston 140 is located at the lower part of the inner cavity 110 of the shell 100, when the door is closed, the reset part on the door leaf provides external force to push the plug rod portion 160 to move upwards so as to drive the plunger portion 150 to move upwards, hydraulic oil in the upper oil cavity 170 flows to the lower oil cavity 180 through a gap between the reducing oil needle 130 and the first oil duct port, and as the diameter of the reducing oil needle 130 is changed, the gap between the reducing oil needle 130 and the first oil duct port is also changed, and non-uniform motion can be realized.

Specifically, as shown in fig. 2, the first oil passage includes a blind hole oil passage 190 extending from the bottom surface of the plunger portion 150 to the inside of the plug portion 160, a side hole 200 provided at the side surface of the plug portion 160 to communicate with the blind hole oil passage 190, and the reducing oil needle 130 is fitted with the blind hole oil passage 190. The first oil passage is reasonable in structure, is favorable for being matched with the reducing oil needle 130, and when the piston 140 moves downwards, hydraulic oil in the lower oil cavity 180 flows to the blind oil passage 190 from a gap between the reducing oil needle 130 and a port of the blind oil passage 190, and then flows to the upper oil cavity 170 through the side oil passage 200.

In addition, the plunger portion 150 is provided with a collar step 210 that narrows toward the port of the blind-hole oil passage 190, and the collar step 210 is provided with a through hole 220 that allows the variable-diameter oil needle 130 to enter the blind-hole oil passage 190. The convex ring step 210 reduces the port of the blind hole oil duct 190, so that the oil pressure of the pressurized oil cavity can be improved, and therefore the buffer effect is improved.

As shown in fig. 1, in the first embodiment of the present utility model, the check valve is oriented such that the upper oil chamber 170 opens into the lower oil chamber 180, and the diameter of the variable diameter oil needle 130 increases from top to bottom. Therefore, when the door is closed, the reset part on the door leaf provides external force to push the plug rod part 160 to move downwards so as to bring the plug rod part 150 to move downwards, and the gap between the reducing oil needle 130 and the port of the blind hole oil duct 190 is also changed from large to small, so that the door leaf is closed quickly at the beginning of the closing section, the middle section is slightly slow, the rear section is closed slowly, the mute closing of the door leaf is realized, the closing time is reduced, the room temperature is not easy to run off, and the energy-saving effect is achieved.

As shown in fig. 3, in the second embodiment of the present utility model, the variable diameter oil needle 130 is divided into an upper section and a lower section, and the lower section is provided at the outer circumference with an oil passage ring groove 230. Therefore, the gap between the reducing oil needle 130 and the port of the blind hole oil duct 190 is changed from large to small and then is changed from large, so that the door closing speed is high, the buffer effect is realized when the door is closed slowly in the middle section, and the door leaf can be closed slightly fast when the door leaf is closed, so that the door leaf is closed smoothly with collision force and locked.

It will be appreciated that as shown in fig. 2 and 4, the opening 120 is provided with a first seal 240, the first seal 240 being in sliding engagement with the stem 160. The first seal ring 240 is provided to provide a sealing effect to prevent hydraulic oil from flowing out of the gap between the opening 120 and the stopper rod portion 160.

Further, a seal ring groove 250 is provided on the outer periphery of the plunger portion 150, and a second seal ring 260 is provided on the seal ring groove 250. The provision of the second seal ring 260 provides a sealing effect that prevents the passage of hydraulic oil through the gap between the plunger portion 150 and the inner chamber 110.

Further, one of the top surface and the bottom surface of the plunger portion 150 is provided with an oil passing hole 270 for communicating the bottom surface and the side surface of the sealing ring groove 250, and the other of the top surface and the bottom surface of the plunger portion 150 is provided with an oil returning channel 280 for communicating the side surface of the sealing ring groove 250, and the sealing ring groove 250, the second sealing ring 260, the oil passing hole 270 and the oil returning channel 280 form a one-way valve. The check valve is disposed without adding additional parts, as shown in fig. 3, for example, the oil passing hole 270 is disposed at the bottom surface of the plunger portion 150, and the oil returning channel 280 is disposed at the top surface of the plunger portion 150, so that when the piston 140 moves upward, hydraulic oil in the upper oil chamber 170 enters from the oil returning channel 280 to push the second sealing ring 260 to slide downward, and the hydraulic oil can enter the oil passing hole 270 through the bottom surface of the sealing ring groove 250 to enter the lower oil chamber 180. When the piston 140 moves downward, the hydraulic oil in the lower oil chamber 180 enters from the oil passing hole 270 to push the second seal ring 260 to slide upward, thereby blocking the oil return passage 280 at the side of the seal ring groove 250, so that the hydraulic oil cannot pass through, as shown in fig. 1. It should be noted that, more than one oil passing hole 270 and one oil returning channel 280 are provided, so that the function of the check valve is ensured, and one of the oil passing holes 270 or the oil returning channels 280 is prevented from being blocked to cause the failure of the check valve.

As shown in fig. 5, in the third embodiment of the present utility model, the check valve includes a valve chamber 290 provided in the plunger portion 150, and a valve spool 300 provided in the valve chamber 290. The check valve is simple in structure and stable in operation.

Preferably, the lower oil chamber 180 is provided with a return spring 310 sleeved on the reducing oil needle 130. When the external force is removed, the return spring 310 pushes the piston 140 to move upwards to return, and it is required to be noted that the driving force of the return part matched with the hydraulic cylinder on the door leaf can be much larger, and the spring force of the return spring 310 can hardly influence the power output when the door is closed.

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

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

Claims (10)

1. A variable speed buffer cylinder, comprising:

the shell (100) is provided with an inner cavity (110), an opening (120) is formed in the top of the shell, and a reducing oil needle (130) which is vertically arranged towards the opening (120) is arranged on the bottom surface of the inner cavity (110);

piston (140), including with inner chamber (110) clearance fit's plunger portion (150), with plunger portion (150) are connected and stretch out cock stem portion (160) of opening (120), plunger portion (150) will inner chamber (110) divide into oil pocket (170) and lower oil pocket (180), piston (140) are provided with the intercommunication go up oil pocket (170) and lower oil pocket (180) first oil duct, reducing oil needle (130) with first oil duct cooperation is equipped with the check valve on plunger portion (150).

2. The speed change buffer cylinder according to claim 1, wherein the first oil passage includes a blind hole oil passage (190) extending from a bottom surface of the plunger portion (150) to an inside of the plug stem portion (160), a side hole (200) provided at a side surface of the plug stem portion (160) in communication with the blind hole oil passage (190), and the reducing oil needle (130) is fitted with the blind hole oil passage (190).

3. A shift buffer cylinder according to claim 2, characterized in that the plunger portion (150) is provided with a collar step (210) narrowing toward the port of the blind hole oil passage (190), the collar step (210) being provided with a through hole (220) allowing the reducing oil needle (130) to enter the blind hole oil passage (190).

4. The shift shock cylinder according to claim 1, wherein the check valve is oriented such that the upper oil chamber (170) opens into the lower oil chamber (180), and the diameter of the diameter-variable oil needle (130) increases from top to bottom.

5. The variable speed buffer cylinder according to claim 4, wherein the diameter-variable oil needle (130) is divided into an upper section and a lower section, and an oil passage ring groove (230) is provided at the outer periphery of the lower section.

6. A gear shift buffer cylinder according to claim 1, characterized in that the opening (120) is provided with a first sealing ring (240), the first sealing ring (240) being in sliding fit with the plug stem (160).

7. The gear shift buffer cylinder according to claim 1, wherein a sealing ring groove (250) is provided on the outer periphery of the plunger portion (150), and a second sealing ring (260) is provided on the sealing ring groove (250).

8. The variable speed buffer cylinder according to claim 7, wherein one of the top surface and the bottom surface of the plunger portion (150) is provided with an oil passing hole (270) communicating the bottom surface and the side surface of the seal ring groove (250), the other of the top surface and the bottom surface of the plunger portion (150) is provided with an oil returning channel (280) communicating the side surface of the seal ring groove (250), and the seal ring groove (250), the second seal ring (260), the oil passing hole (270) and the oil returning channel (280) form the check valve.

9. The shift shock cylinder according to claim 7, wherein the check valve includes a valve chamber (290) provided in the plunger portion (150), and a spool (300) provided in the valve chamber (290).

10. A gear shift buffer cylinder according to claim 4 or 5, characterized in that the lower oil chamber (180) is provided with a return spring (310) which is sleeved on the reducing oil needle (130).

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