A piston rod device that is easy to adjust

Abstract

The present invention discloses a piston rod device that is easy to adjust, including a cylinder body, a piston rod inserted into the cylinder body, a piston fixedly connected to the bottom of the piston rod, the piston arranged in an active cavity inside the cylinder body, a first hinge block arranged on the cylinder body, a connecting rod hinged to the first hinge block through a rotating shaft, medium storage tanks arranged on both sides of the cylinder body, the medium storage tank and the lower chamber are connected through a pipeline, a medium inlet and outlet are arranged on the medium storage tank, and a floating plate and a card seat are arranged inside the medium storage tank. The present invention can effectively adjust the stroke of the piston rod by arranging the connecting rod, the pressure rod, the lower chamber and the medium storage tank.

Description

Technical Field

[0001] The invention relates to the technical field of piston rods, in particular to a piston rod device which is easy to adjust. Background Art

[0002] The stroke and installation position (center distance from the cylinder bottom locating ring to the top of the piston rod) of ordinary hydraulic cylinders are fixed. The working stroke of the hydraulic cylinder piston rod is determined by the effective working length of the hydraulic cylinder barrel and the piston length. Usually, the effective working length of the hydraulic cylinder barrel minus the piston length is the working stroke of the piston rod. The effective working length and piston length of the traditional hydraulic cylinder barrel are constant, so its working stroke is immutable. In some special environments where the working position of such hydraulic cylinders is inaccurate or unpredictable, since the bottom of the cylinder is sealed, the piston rod can only move within the cylinder. When a different stroke is required, the cylinder must be replaced to meet different mold requirements; replacing the cylinder is very troublesome to operate, which wastes a lot of time and human resources, brings inconvenience to production and cannot meet installation requirements. A Chinese patent with application number CN201620449428.9 discloses a hydraulic cylinder structure with an adjustable piston rod stroke. Through a threaded connection between a U-shaped sleeve and a U-shaped barrel liner, a positive rotation shortens the cylinder length, while a reverse rotation increases the cylinder length, thereby making the piston stroke adjustable. However, the drawback of this solution is that when adjusting through the sleeve and the barrel liner, there is no buffering measure, and the pressure during the movement of the piston rod is relatively high, which can easily cause damage to the piston rod when the movement of the piston rod is restricted. Summary of the invention

[0003] The object of the present invention is to provide a piston rod device that is easy to adjust, so as to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a piston rod device that is easy to adjust, comprising a cylinder body, a piston rod is inserted into the cylinder body, a piston is fixedly connected to the bottom of the piston rod, the piston is arranged in an active cavity inside the cylinder body, the cylinder body is provided with a first hinge block, the first hinge block is hinged with a connecting rod through a rotating shaft, the piston rod is provided with a second hinge block, the connecting rod is connected to the second hinge block on the side away from the first hinge block, a pressure rod is provided at the bottom of the connecting rod, and a partition plate is also provided inside the cylinder body, the partition plate divides the interior of the cylinder body into an upper chamber and a lower chamber, the bottom of the pressure rod penetrates the partition plate and extends into the lower chamber and is fixedly connected to the pressure plate, medium storage tanks are provided on both sides of the cylinder body, the medium storage tank and the lower chamber are connected by a pipeline, a medium inlet and outlet are provided on the medium storage tank, and a floating plate and a card seat are provided inside the medium storage tank.

[0005] Preferably, a gas flow box is provided at the top of the medium storage tank. The gas flow box communicates with the medium storage tank. A barometer is provided at the top of the gas flow box, and a gas valve port is provided on one side of the gas flow box.

[0006] Preferably, the barometer includes a fixed seat. A measuring chamber is provided inside the fixed seat. A floating column is slidably provided in the measuring chamber. Column heads are symmetrically provided at the upper and lower ends of the floating column. A spring is fixedly sleeved on the column head at the upper end of the floating column. An opening is provided at the top of the measuring chamber.

[0007] Preferably, an adjusting sleeve is provided at the top of the cylinder block. The adjusting sleeve includes a fixed end fixed to the top of the cylinder block and a movable end threadedly connected to the fixed end. The piston rod passes through the movable end and is coaxially arranged with the movable end. A handle ring is provided at the top of the piston rod. The diameter of the handle ring is larger than the diameter of the piston rod.

[0008] Preferably, an adjusting rod is further included. The adjusting rod is rotatably arranged inside the piston rod. The bottom of the adjusting rod communicates with an adjusting plug. The adjusting plug is arranged in the piston. A first through hole is provided at the top of the adjusting plug. A second through hole corresponding to the first through hole is provided at the top of the piston.

[0009] Preferably, a glass window is provided on the barometer, and scales are provided on the side wall of the measuring chamber.

[0010] Preferably, a rotating seat is connected to the top of the movable end.

[0011] Preferably, a rubber gasket is provided at the bottom of the handle ring.

[0012] Preferably, the medium in the medium storage tank is a liquid.

[0013] Preferably, a sealing gasket is provided between the cylinder block and the piston rod.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1) When the piston rod moves downward, it will pull the connecting rod downward, thereby driving the pressure rod and the pressing plate to squeeze downward. The lower chamber and the medium storage tank store a liquid medium. The liquid medium is squeezed from the lower chamber into the medium storage tank and moves upward along the medium storage tank, driving the floating plate to move upward. After moving a certain distance, the floating plate is caught by the clamping seat, restricting the flow of the liquid medium, thereby restricting the downward movement of the piston rod, restricting the stroke of the piston rod. At the same time, this restriction will form a buffer for the movement of the piston rod through the flow of the liquid medium, avoiding damage to the piston rod;

[0016] 2) Gas can be introduced into the medium storage tank through the gas flow box, so as to obtain a buffer when the floating plate floats and brakes, and strengthen the protection of the floating plate and the clamping seat;

[0017] 3) The present invention is also provided with an adjustment sleeve, by rotating the movable end, the height of the movable end can be adjusted to limit the downward movement distance of the top of the piston rod. In this way, an emergency measure can be provided for the stroke control of the piston rod to avoid the inability to limit the stroke of the piston rod after the medium storage tank fails due to a fault;

[0018] 4) The present invention is also provided with a hollow adjusting rod, through which the filling medium can be filled into the moving cavity on the upper part of the piston via the adjusting rod and the adjusting plug, and the lifting stroke of the piston rod can be limited. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention.

[0020] Figure 2 Schematic diagram of the barometer structure.

[0021] Figure 3 It is a schematic diagram of the structure of the regulating plug part.

[0022] Figure 4 This is a schematic diagram of the structure of the regulating plug from a top view.

[0023] In the figure: 1 cylinder body, 2 piston rod, 3 piston, 4 first hinge block, 5 connecting rod, 6 second hinge block, 7 pressure rod, 8 partition plate, 9 upper chamber, 10 lower chamber, 11 pressure plate, 12 medium storage tank, 13 medium inlet and outlet, 14 floating plate, 15 card seat, 16 gas flow box, 17 air pressure meter, 18 gas valve port, 19 fixed seat, 20 metering chamber, 21 floating column, 22 column head, 23 spring, 24 fixed end, 25 movable end, 26 handle ring, 27 adjusting rod, 28 adjusting plug, 29 first through hole, 30 second through hole, 31 glass window, 32 scale, 33 rotating seat, 34 rubber gasket, 35 sealing gasket, 36 opening. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-3, a piston rod device that is easy to adjust, includes a cylinder body 1, a piston rod 2 is inserted into the cylinder body 1, a sealing gasket 35 is provided between the cylinder body 1 and the piston rod 2, a piston 3 is fixedly connected to the bottom of the piston rod 2, and the piston 3 is arranged in the active chamber inside the cylinder body 1, a first hinge block 4 is provided on the cylinder body 1, and the first hinge block 4 is hinged with a connecting rod 5 through a rotating shaft, a second hinge block 6 is provided on the piston rod 2, and the side of the connecting rod 5 away from the first hinge block 4 is connected to the second hinge block 6, and a pressure rod 7 is provided at the bottom of the connecting rod 5. When the piston rod 2 moves up and down, it will drive the second hinge block 6 to move up and down, and the second hinge block 6 drives the right side of the connecting rod 5 to move up and down with the first hinge block 4 as the center point, and the connecting rod 5 drives the pressure rod 7 to move up and down, and a partition plate 8 is also provided inside the cylinder body 1, and the partition plate 8 separates the cylinder body The interior of the cylinder 1 is divided into an upper chamber 9 and a lower chamber 10. The bottom of the pressure rod 7 penetrates through the partition plate 8 and goes deep into the lower chamber 10 and is fixedly connected with a pressure plate 11. Medium storage tanks 12 are arranged on both sides of the cylinder body 1. The medium storage tank 12 and the lower chamber 10 are connected through a pipeline. A medium inlet and outlet 13 is arranged on the medium storage tank 12. A floating plate 14 and a seat 15 are arranged inside the medium storage tank 12. Liquid or gaseous medium can be injected into the medium storage tank 12 through the medium inlet and outlet 13. From the perspective of buffering effect, a liquid medium such as high-pressure oil is preferably selected. The high-pressure oil is injected into the medium storage tank 12, and the high-pressure oil flows into the lower chamber 10 through the bottom pipe. The floating plate 14 in the medium storage tank 12 is slidably connected to the inside of the medium storage tank 12 and is located above the high-pressure oil. In the lower chamber 10, When the pressure plate 11 moves up and down, the high-pressure oil in the lower chamber 10 will be squeezed into the medium storage tank 12 through the pipeline. The height of the high-pressure oil in the medium storage tank 12 will rise, and at the same time, the floating plate 14 will be pushed up. After the floating plate 14 moves up to a certain distance, it will be stuck by the fixed seat 15 on the medium storage tank 12, limiting the upward movement of the floating plate 14. At this time, the high-pressure oil in the lower chamber 10 cannot be squeezed into the medium storage tank 12, and the downward pressing distance of the pressure plate 11 is limited, thereby limiting the downward stroke of the piston rod 2. The limiting process is buffered to a certain extent by squeezing the liquid, so it will not cause damage to the piston rod 2 when limiting the stroke of the piston rod 2. A gas flow box 16 is set on the top of the medium storage tank 12. The gas flow box 16 is connected to the medium storage tank 12. A gas pressure meter 17 is provided on the top, a gas valve port 18 is provided on one side of the gas flow box 16, the gas pressure meter 17 comprises a fixed seat 19, a metering cavity 20 is provided in the fixed seat 19, a floating column 21 is slidably provided in the metering cavity 20, column heads 22 are symmetrically provided at the upper and lower ends of the floating column 21, a spring 23 is fixedly sleeved on the column head 22 at the upper end of the floating column 21, and a certain amount of gas can be injected into the gas flow box 16 through the medium valve port. Since the gas flow box 16 and the medium storage tank 12 are connected, the floating plate 14 will be restricted by the gas pressure before being restricted by the card seat 15 when it moves upward, thereby avoiding direct collision between the floating plate 14 and the card seat 15, extending the service life of the floating plate 14 and the card seat 15, and further playing a buffering role in limiting the stroke of the piston rod 2.When the floating plate 14 rises, the air pressure in the flow box will increase. The floating column 21 in the air pressure meter 17 will overcome the elastic force of the spring 23 and rise under the action of the air pressure. A glass window 31 is provided on the air pressure meter 17, and a scale 32 is provided on the side wall of the metering cavity 20. The current air pressure in the gas flow box 16 can be observed through the glass window 31. An opening 36 is provided on the top of the metering cavity 20. Since there is a certain gap between the floating column 21 and the metering cavity 20, the gas in the gas flow box 16 will flow out from the opening 36 after being squeezed, so as to avoid the gas flow box 16 being in high pressure for a long time. After the air pressure in the gas flow box 16 is observed to be lower than a certain threshold through the air pressure meter 17, it will be The gas valve port 18 is supplemented. In this embodiment, an emergency structure is also provided. An adjusting sleeve is provided on the top of the cylinder body 1. The adjusting sleeve includes a fixed end 24 fixed to the top of the cylinder body 1 and a movable end 25 threadedly connected to the fixed end 24. The piston rod 2 passes through the movable end 25 and is coaxially arranged with the movable end 25. The top of the movable end 25 is connected to a rotating seat 33. A handle ring 26 is provided on the top of the piston rod 2. A rubber gasket 34 is provided at the bottom of the handle ring 26. The diameter of the handle ring 26 is larger than the diameter of the piston rod 2. The height of the movable end 25 can be adjusted by rotating the rotating seat 33, thereby limiting the downward distance of the handle ring 26 of the piston rod 2. This scheme ensures that the piston rod 2 is in a state of being ... The movement stroke of the piston rod 2 can be prevented as an emergency structure to prevent a certain structure in the scheme of liquid squeezing buffer from failing. When the stroke of the piston rod 2 cannot be limited, this method can be used for emergency response. Otherwise, once the piston rod 2 fails in the working state, it cannot continue to work, which will cause the shutdown of the entire equipment. Through this emergency plan, the stroke of the piston rod 2 can be emergency started until the piston rod 2 stops working and is repaired during non-working hours. Through this emergency plan, the intermittent loss caused by maintenance during working hours can be avoided. This embodiment also includes an adjusting rod 27, which can be rotatably arranged inside the piston rod 2, and the bottom of the adjusting rod 27 is connected to an adjusting plug 28, the regulating plug 28 is arranged in the piston 3, the top of the regulating plug 28 is provided with a first through hole 29, the top of the piston 3 is provided with a second through hole 30 corresponding to the first through hole 29, the regulating rod 27 is a hollow structure, by injecting gas or liquid and other filling materials into the inside of the regulating rod 27, the filling materials are moved along the inside of the regulating rod 27 to the bottom of the regulating plug 28, the rotating regulating rod 27 drives the regulating plug 28 to rotate, so that the first through hole 29 and the second through hole 30 are coaxial, and the filling materials enter the cavity at the top of the piston 3 along the two through holes, and after filling, the regulating rod 27 is rotated to make the two through holes staggered, so that the upward movement stroke of the piston rod 2 will also be limited to meet the needs of some special environments.

[0026] The operating principle of this embodiment is as follows: by injecting high-pressure oil into the medium storage tank 12, the high-pressure oil enters the lower chamber 10, and the piston rod 2 moves downward, driving the pressure plate 11 downward, so that the high-pressure oil in the lower chamber 10 passes through the pipeline into the medium storage tank 12, and when the height of the high-pressure oil in the medium storage tank 12 rises, the floating plate 14 is driven to rise, and after the floating plate 14 is restricted, the pressure plate 11 in the lower chamber 10 cannot be pressed down, thereby limiting the downward stroke of the piston rod 2, and the flow of the liquid medium will buffer the downward movement of the piston rod 2 to avoid damage to the piston rod 2.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable piston rod device, comprising a cylinder block (1), a piston rod (2) is inserted into the cylinder block (1), a piston (3) is fixedly connected to the bottom of the piston rod (2), and the piston (3) is arranged in a movable cavity inside the cylinder block (1). Characterized in that: A first hinge block (4) is arranged on the cylinder block (1), the first hinge block (4) is hinged with a connecting rod (5) through a rotating shaft, a second hinge block (6) is arranged on the piston rod (2), one side of the connecting rod (5) away from the first hinge block (4) is connected with the second hinge block (6), a pressure rod (7) is arranged at the bottom of the connecting rod (5), a partition plate (8) is further arranged inside the cylinder block (1), the partition plate (8) divides the interior of the cylinder block (1) into an upper chamber (9) and a lower chamber (10), the bottom of the pressure rod (7) penetrates through the partition plate (8) and extends into the lower chamber (10) and is fixedly connected with a pressing plate (11), medium storage tanks (12) are arranged on both sides of the cylinder block (1), the medium storage tanks (12) and the lower chamber (10) are communicated through pipelines, a medium inlet and outlet (13) is arranged on the medium storage tanks (12), a floating plate (14) and a clamping seat (15) are arranged inside the medium storage tanks (12), a gas flow box (16) is set at the top of the medium storage tanks (12), the gas flow box (16) is communicated with the medium storage tanks (12), a gas pressure gauge (17) is arranged at the top of the gas flow box (16), a gas valve port (18) is arranged on one side of the gas flow box (16), the gas pressure gauge (17) comprises a fixed seat (19), a measuring cavity (20) is arranged inside the fixed seat (19), a floating column (21) is slidably arranged in the measuring cavity (20), the upper and lower ends of the floating column (21) are symmetrically provided with column heads (22), a spring (23) is fixedly sleeved on the column head (22) at the upper end of the floating column (21), an opening (36) is arranged at the top of the measuring cavity (20), an adjusting sleeve is arranged at the top of the cylinder block (1), the adjusting sleeve comprises a fixed end (24) fixed to the top of the cylinder block (1) and a movable end (25) threadedly connected with the fixed end (24), the piston rod (2) passes through the movable end (25) and is coaxially arranged with the movable end (25), a handle ring (26) is arranged at the top of the piston rod (2), and the diameter of the handle ring (26) is larger than the diameter of the piston rod (2).

2. An adjustable piston rod device according to claim 1, Characterized in that: It further comprises an adjusting rod (27), the adjusting rod (27) is rotatably arranged inside the piston rod (2), the bottom of the adjusting rod (27) is communicated with an adjusting plug (28), the adjusting plug (28) is arranged in the piston (3), a first through hole (29) is arranged at the top of the adjusting plug (28), and a second through hole (30) corresponding to the first through hole (29) is arranged at the top of the piston (3).

3. An adjustable piston rod device according to claim 2, Characterized in that: The air pressure meter (17) is provided with a glass window (31), and the side wall of the metering cavity (20) is provided with a scale (32).

4. A piston rod device that is easy to adjust according to claim 3, Features: The top of the movable end (25) is connected to a rotating seat (33).

5. A piston rod device that is easily adjustable according to claim 4, Features: A rubber gasket (34) is provided at the bottom of the handle ring (26).

6. A piston rod device that is easily adjustable according to claim 5, Features: The medium in the medium storage tank (12) is liquid.

7. A piston rod device that is easily adjustable according to claim 6, Features: A sealing gasket (35) is provided between the cylinder body (1) and the piston rod (2).

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