A hydraulic cylinder with anti-leakage function

Abstract

The present invention relates to the technical field of hydraulic cylinders, and discloses a hydraulic oil cylinder with a liquid leakage prevention function, comprising a hydraulic unit, a fixed locking unit, and a positioning guide unit. The present invention is provided with a fixed locking unit. When locking, the operator can rotate the screw shaft, and the screw shaft drives the synchronous plate engaged with the side wall to move downward, and the synchronous plate can drive the synchronous plate connected to the side wall to move downward, and the synchronous plate pushes the guide slider to move downward, and during the downward movement, the guide slider slides along the lower pressure groove, and the lower pressure rod can be guided to approach the center through the lower pressure groove, so that the lower pressure block on the lower pressure rod can be moved to the top of the external interface. After the screw shaft rotates, the separation path of the external interface is blocked, and the continuous movement of the lower pressure block can press the lower pressure block tightly against the surface of the external interface, so that the rotation and movement separation path of the external interface is restricted, and finally the purpose of locking is achieved, reducing the possibility of hydraulic oil leakage.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydraulic cylinders, and in particular relates to a hydraulic oil cylinder with a liquid leakage prevention function. Background Art

[0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy to perform linear reciprocating motion or swinging motion. It has a simple structure and reliable operation. When using it to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap and the movement is smooth. Therefore, it is widely used in the hydraulic systems of various machines.

[0003] During the operation of existing hydraulic cylinders, the internal hydraulic oil will produce pressure changes, causing the cylinder to vibrate. This vibration is more obvious when the cylinder is frequently extended and retracted or moves under high load and high speed. This vibration may cause the interface to loosen, resulting in hydraulic oil leakage. For hydraulic cylinders with components movably connected at both ends, the position of the entire hydraulic cylinder housing may change during the startup process, which may cause the oil pipe to bend at the interface. With repeated operations, gaps may be generated at the connection between the interface and the oil pipe, resulting in hydraulic oil leakage.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0006] A hydraulic oil cylinder with a liquid leakage prevention function comprises a hydraulic unit, a fixing and locking unit, and a positioning and guiding unit.

[0007] The hydraulic unit includes a hydraulic cylinder, the side wall of the hydraulic cylinder is connected to two connection interfaces, and the connection interfaces are screwed with external interfaces, and the external interfaces are installed with oil pipes;

[0008] Material toggling mechanism, its both ends are to be connected multiple times by two guide rails, and the guide rails are to be connected multiple times by two guide rails respectively. The guide rails are to be connected multiple times by two guide rails of the hydraulic cylinder to form a circle, and a circle with a right angles is fixed to the guide rail.

[0009] The positioning and guiding unit includes a push rod, which movably passes through the lower pressure block. A rocker arm is rotatably installed on the inner wall of the lower pressure block. The rocker arm is slidably connected to the top of the push rod. A flip bracket is installed at the rotation center of the rocker arm. A guide roller is movably inserted on the flip bracket, and a limiting spring is clamped between the guide roller and the side wall of the flip bracket. An inner groove is opened on the surface of the guide roller, and the inner groove corresponds to the side wall of the oil pipe.

[0010] As a preferred embodiment of the present invention, an end cover is installed at one end of the hydraulic cylinder, a base is installed at the other end of the hydraulic cylinder, a fixed block is installed at the bottom of the base, a circular mounting hole is opened on the fixed block, a piston assembly is movably installed inside the hydraulic cylinder, and the piston assembly movably passes through the end cover.

[0011] As a preferred embodiment of the present invention, a connecting block is installed at the end of the screw shaft, a crank is welded on the connecting block, a handle is installed on the crank, and an anti-slip sleeve is installed on the surface of the handle.

[0012] As a preferred embodiment of the present invention, a support cover is rotatably installed on the screw shaft, a support platform is installed on the bottom of the support cover by bolts, and the support platform is cast integrally with the hydraulic cylinder, and a limit rod is vertically installed inside the support cover, the limit rod is movably connected to the synchronization plate, and the synchronization plate is located in the internal chamber of the support cover.

[0013] As a preferred embodiment of the present invention, a clamping seat is installed at the end of each pair of pressure plates, and the clamping seat is slidably clamped on the surface of the synchronous ring. A locking bolt is screwed between the synchronous ring and the clamping seat. The side wall of the partition is installed with an outer cover, and the outer cover is welded to the side wall of the hydraulic cylinder. The connecting interface movably passes through the outer cover, and the side wall of the pressure plate is slidably connected to the side wall of the outer cover.

[0014] As a preferred embodiment of the present invention, a strip groove is provided inside the pressure plate, a guide rod is installed horizontally through the strip groove, a sliding rod is provided through the guide rod, and the sliding rod is placed in the strip groove, the sliding rod is connected to the side wall of the guide slider, and a compression spring is sleeved on the guide rod, one end of the compression spring is clamped to the side wall of the strip groove, and the other end is clamped to the side wall of the sliding rod.

[0015] As a preferred embodiment of the present invention, a plurality of pairs of directional grooves are provided on the outer cover, and extension lines of the plurality of pairs of directional grooves converge at the center of the connection interface. A pressing rod is slidably provided on the directional groove.

[0016] As a preferred embodiment of the present invention, a push plate is installed at the bottom of the push rod, an anti-slip groove is opened at the bottom of the push plate, a baffle is installed on the top of the push rod, the baffle is placed in the cavity opened on the inner wall of the lower pressure block, and a return spring is sleeved on the side wall of the push rod located inside the cavity, one end of the return spring is clamped to the bottom of the cavity, and the other end is clamped to the bottom of the baffle.

[0017] As a preferred embodiment of the present invention, a through slot is provided on the rocker arm, a bump is slidably provided inside the through slot, a side plate is installed on the side wall of the bump, and the end of the side plate is connected to the top of the push rod.

[0018] As a preferred embodiment of the present invention, a synchronization shaft is installed at the rotation center of the rocker arm, and the synchronization shaft movably passes through the side wall of the lower pressure block. The end of the synchronization shaft is interconnected with the rotation center of the flip bracket, and an insertion shaft is installed horizontally through the inside of the flip bracket. The insertion shaft is movably plugged into the guide roller, and the limit spring is sleeved on the outside of the insertion shaft.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention is provided with a fixed locking unit. When locking, the operator can rotate the screw shaft, and the screw shaft drives the synchronous plate engaged with the side wall to move downward, and the synchronous plate can drive the synchronous plate connected to the side wall to move downward, and the synchronous plate pushes the guide slider downward, and during the downward movement, the guide slider slides along the lower pressure groove, and the lower pressure rod can be guided to approach the center through the lower pressure groove, so that the lower pressure block on the lower pressure rod can be moved above the external interface. In this way, it is ensured that when the screw shaft does not rotate, the horizontal installation of the external interface and the connecting interface will not be affected. After the screw shaft rotates, the separation path of the external interface is blocked, and through the continuous movement of the lower pressure block, the lower pressure block can be tightly pressed against the surface of the external interface, so that the rotational movement and separation path of the external interface is restricted, and finally the locking purpose is achieved, reducing the possibility of hydraulic oil leakage.

[0021] The present invention is provided with a positioning guide unit. After the lower pressure block is tightly pressed against the surface of the external interface, the push rod on the lower pressure block is squeezed and moved inward, thereby squeezing the rocker arm to swing, and the rocker arm can drive the coaxially connected flip bracket to rotate, and the flip bracket tightly fits the guide roller on the surface to the surface of the oil pipe. When the oil pipe is bent at a later stage, the bending point is transferred from the connection between the oil pipe and the external interface to the surface of the oil pipe. Since the oil pipe is made of rubber, it has better toughness and will not produce gaps when bent, thereby reducing the possibility of hydraulic oil leakage.

[0022] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In the attached figure:

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of a hydraulic cylinder with a leakage-proof function;

[0025] Figure 2 It is a schematic diagram of the side structure of a hydraulic cylinder with a leakage-proof function;

[0026] Figure 3 This is a cross-sectional view of a support cover of a hydraulic cylinder with a leakage-proof function;

[0027] Figure 4 This is a cross-sectional view of the outer cover of a hydraulic oil cylinder with a leakage-proof function;

[0028] Figure 5 A hydraulic cylinder with anti-leakage function Figure 4 Enlarged view of point A in the middle;

[0029] Figure 6 It is a partial cross-sectional view of an outer cover of a hydraulic oil cylinder with a leakage-proof function;

[0030] Figure 7 This is a schematic diagram of the overall structure of a hydraulic cylinder with a leakage-proof function;

[0031] Figure 8 A hydraulic cylinder with anti-leakage function Figure 7 Enlarged view of point B in the middle;

[0032] Figure 9 This is a cross-sectional view of the lower pressure block of a hydraulic cylinder with a leakage-proof function.

[0033] In the picture:

[0034] 100, hydraulic unit; 101, hydraulic cylinder; 1011, support platform; 102, piston assembly; 103, end cover; 1031, fixing block; 1032, base; 104, connection interface; 1041, external interface; 1042, oil pipe;

[0035] 200, fixed locking unit; 201, screw shaft; 2011, connecting block; 2012, crank; 2013, handle; 202, synchronization plate; 2021, limit rod; 2022, support cover; 203, synchronization ring; 2031, holder; 2032, pressure plate; 2033, strip groove; 204, partition; 2041, outer cover; 2042, lower pressure groove; 2043, guide slider; 2044, slide rod; 2046, guide rod; 2047, compression spring; 205, lower pressure rod; 2051, pointing groove; 2052, lower pressure block; 2053, cavity;

[0036] 300, positioning guide unit; 301, push rod; 3011, push plate; 3012, baffle; 3013, return spring; 3014, side plate; 3015, bump; 302, synchronization shaft; 3021, rocker arm; 3022, through slot; 303, flip bracket; 3031, plug shaft; 3032, guide roller; 3033, inner groove; 3034, limit spring. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0038] Example 1:

[0039] like Figures 1 to 9 As shown, a hydraulic cylinder with a leakage-proof function includes a hydraulic unit 100 , a fixing and locking unit 200 and a positioning and guiding unit 300 .

[0040] The hydraulic unit 100 includes a hydraulic cylinder 101. Two connection interfaces 104 are connected to the side wall of the hydraulic cylinder 101. An external connection interface 1041 is screwed onto the connection interface 104. An oil pipe 1042 is installed on the external connection interface 1041.

[0041] The fixed locking unit 200 includes a screw shaft 201, which is rotatably mounted on the side wall of the hydraulic cylinder 101 and is placed at the center of the two connecting interfaces 104. A synchronization plate 202 is meshed on the screw shaft 201, and synchronization rings 203 are installed at both ends of the synchronization plate 202. The synchronization rings 203 are slidably arranged on the side walls of the corresponding connecting interfaces 104. Three pairs of pressure plates 2032 are installed on the side walls of the synchronization rings 203. Three pairs of partitions 204 are evenly installed around each connecting interface 104. Each pair of partitions 204 has an opening. A lower pressing groove 2042 is provided, and the lower pressing groove 2042 is a linear groove. The end of the lower pressing groove 2042 close to the hydraulic cylinder 101 is closer to the connection interface 104 than the other end. A guide slider 2043 is provided inside the lower pressing groove 2042 for sliding. The guide slider 2043 is horizontally slidably connected to the side wall of the corresponding pressure plate 2032. A lower pressing rod 205 is installed on the guide slider 2043, and a lower pressing block 2052 is installed on the lower pressing rod 205. The lower pressing block 2052 is placed above the external interface 1041. The present invention is provided with a fixed locking unit. 200, when locking, the operator can rotate the screw shaft 201, and the screw shaft 201 drives the synchronous plate 202 engaged with the side wall to move downward, and the synchronous plate 202 can drive the synchronous ring 203 connected to the side wall to move downward, and the synchronous ring 203 drives the guide slider 2043 to move downward through the pressure plate 2032, and during the downward movement, the guide slider 2043 slides along the lower pressure groove 2042, and the lower pressure rod 205 can be guided to move closer to the center through the lower pressure groove 2042, so that the lower pressure block 2052 on the lower pressure rod 205 can be moved to Above the external interface, this method ensures that when the screw shaft 201 is not rotating, the horizontal installation of the external interface 1041 and the connecting interface 104 will not be affected. After the screw shaft 201 rotates, the separation path of the external interface 1041 is blocked, and through the continuous movement of the lower pressing block 2052, the lower pressing block 2052 can be tightly pressed against the surface of the external interface 1041, so that the rotational movement and separation path of the external interface 1041 is restricted, and finally the purpose of locking is achieved, reducing the possibility of hydraulic oil leakage.

[0042] The positioning and guiding unit 300 includes a push rod 301, which movably passes through the lower pressure block 2052. A rocker arm 3021 is rotatably installed on the inner wall of the lower pressure block 2052. The rocker arm 3021 is slidably connected to the top of the push rod 301. A flip bracket 303 is installed at the rotation center of the rocker arm 3021. A guide roller 3032 is movably inserted on the flip bracket 303, and a limiting spring 3034 is clamped between the guide roller 3032 and the side wall of the flip bracket 303. An inner groove 3033 is provided on the surface of the guide roller 3032, and the inner groove 3033 corresponds to the side wall of the oil pipe 1042. The present invention is provided with a positioning guide unit 300. After the lower pressing block 2052 is tightly pressed against the surface of the external interface 1041, the push rod 301 on the lower pressing block 2052 is squeezed and moved inward, thereby squeezing the rocker arm 3021 to swing, and the rocker arm 3021 can drive the coaxially connected flip bracket 303 to rotate, and the flip bracket 303 makes the guide roller 3032 on the surface fit tightly against the surface of the oil pipe 1042. When the oil pipe is bent later, the bending point is transferred from the connection between the oil pipe and the external interface to the surface of the oil pipe. Since the oil pipe is made of rubber, it has better toughness and no gap will be generated when bending, thereby reducing the possibility of hydraulic oil leakage. When the oil pipe 1042 shakes later, it will drive the guide roller 3032 to slide along the plug shaft 3031. The position of the guide roller 3032 changes, which can also serve the purpose of guidance and ensure that the bending angle is not too large.

[0043] like Figures 1 to 9 As shown, in a specific embodiment, an end cap 103 is mounted on one end of the hydraulic cylinder 101, and a base 1032 is mounted on the other end of the hydraulic cylinder 101. The end cap 103 and the base 1032 serve the purpose of connection. A fixing block 1031 is mounted on the bottom of the base 1032, and a circular mounting hole is opened on the fixing block 1031. A piston assembly 102 is movably mounted inside the hydraulic cylinder 101, and the piston assembly 102 movably passes through the end cap 103. The piston assembly 102 is prior art, and its specific structure and working principle are not repeated here.

[0044] like Figures 1 to 9As shown, a connecting block 2011 is mounted at the end of the screw shaft 201, a crank 2012 is welded to the connecting block 2011, a handle 2013 is mounted on the crank 2012, and a non-slip cover is installed on the surface of the handle 2013. A support cover 2022 is rotatably mounted on the screw shaft 201, and a support platform 1011 is bolted to the bottom of the support cover 2022. The support platform 1011 is integrally cast with the hydraulic cylinder 101. A limit rod 2021 is vertically mounted inside the support cover 2022. The limit rod 2021 is movably connected to the synchronization plate 202, and the synchronization plate 202 is located in the internal cavity of the support cover 2022. Then the operator manually turns the handle 2013, which drives the crank 2012 to rotate. The crank 2012 can drive the central connecting block 2011 to rotate, and the connecting block 2011 can drive the coaxial screw shaft 201 to rotate inside the support cover 2022. Finally, under the limit of the limit rod 2021, the rotation of the screw shaft 201 can drive the surface synchronization plate 202 to slide along the limit rod 2021 toward the side wall of the hydraulic cylinder 101.

[0045] Example 2:

[0046] The difference between the above embodiment and this embodiment is that: Figures 1 to 9 As shown, a holder 2031 is installed at the end of each pair of pressure plates 2032, and the holder 2031 is slidably engaged with the surface of the synchronous ring 203. A locking bolt is screwed between the synchronous ring 203 and the holder 2031. An outer cover 2041 is installed on the side wall of the partition 204, and the outer cover 2041 is welded to the side wall of the hydraulic cylinder 101. The connecting interface 104 movably passes through the outer cover 2041, and the side wall of the pressure plate 2032 is slidably connected to the side wall of the outer cover 2041. The position of the holder 2031 is conveniently adjusted later by driving the locking bolt of the holder 2031, so that the holder 2031 corresponds to the designated partition 204.

[0047] like Figures 1 to 9As shown, in a specific embodiment, a strip groove 2033 is defined within the pressure plate 2032. A guide rod 2046 is installed transversely through the strip groove 2033. A slide bar 2044 is provided on the guide rod 2046 and is positioned within the strip groove 2033. The slide bar 2044 is connected to the side wall of the guide slider 2043. A compression spring 2047 is sleeved on the guide rod 2046. One end of the compression spring 2047 is engaged with the side wall of the strip groove 2033, and the other end is engaged with the side wall of the slide bar 2044. The outer cover 2041 is defined by a plurality of pairs of directional grooves 2051. The extension lines of the pairs of directional grooves 2051 converge at the center of the connection interface 104. A downward pressing rod 205 is slidably provided on the directional grooves 2051. When the locking plate 2032 is in the downward direction, the sliding bar 2044 on the pressing plate 2032 pushes the guide slider 2043 to slide along the lower pressing groove 2042. Since the lower pressing groove 2042 is in an inclined state, the guide slider 2043 not only drives the lower pressing rod 205 to move downward, but also the guide slider 2043 can move toward the center of the connecting interface 104. That is, the sliding bar 2044 on the guide slider 2043 slides in the strip groove 2033 at this time, and the sliding bar 2044 slides along the guide rod 2046 at this time, playing a guiding role, and the compression spring 2047 on the guide rod 2046 is compressed synchronously, and the compression spring 2047 facilitates the subsequent reset operation.

[0048] Example 3:

[0049] The difference between the above embodiment and this embodiment is that: Figures 1 to 9 As shown, a push plate 3011 is installed at the bottom of the push rod 301, and an anti-slip groove is opened at the bottom of the push plate 3011. A baffle 3012 is installed on the top of the push rod 301. The baffle 3012 is placed in the cavity 2053 opened on the inner wall of the lower pressure block 2052. A return spring 3013 is sleeved on the side wall of the push rod 301 located inside the cavity 2053. One end of the return spring 3013 is clamped to the bottom of the cavity 2053, and the other end is clamped to the bottom of the baffle 3012. When the lower pressure block 2052 is tightly pressed against the surface of the external interface 1041, the push rod 301 and the push plate 3011 inside the lower pressure block 2052 are squeezed by the external interface 1041, so the push rod 301 is contracted toward the inner wall of the cavity 2053, so the baffle 3012 of the push rod 301 moves upward, and then the return spring 3013 is stretched at this time, which facilitates later reset through the return spring 3013.

[0050] like Figures 1 to 9As shown, in a specific embodiment, a through slot 3022 is formed in the rocker arm 3021. A protrusion 3015 is slidably mounted within the through slot 3022. A side plate 3014 is mounted on the side wall of the protrusion 3015. The distal end of the side plate 3014 is connected to the top of the push rod 301. A synchronization shaft 302 is mounted at the rotation center of the rocker arm 3021. The synchronization shaft 302 movably extends through the side wall of the lower pressure block 2052. The distal end of the synchronization shaft 302 is connected to the rotation center of the flip bracket 303. An insertion shaft 3031 is mounted laterally through the interior of the flip bracket 303. The insertion shaft 3031 is movably engaged with a guide roller 3032, and a limit spring 3034 is sleeved on the outside of the insertion shaft 3031. When the push rod 301 moves upward, the side plate 3014 on the push rod 301 drives the protrusion 3015 to move upward, and the protrusion 3015 will slide along the through groove 3022 at this time, thereby driving the entire rocker arm 3021 to swing, and the rocker arm 3021 drives the synchronous shaft 302 to rotate, and the synchronous shaft 302 can eventually drive the flip bracket 303 to flip, and the flip bracket 303 will fit the guide roller 3032 on the surface tightly against the surface of the oil pipe 1042. When the oil pipe 1042 shakes in the later stage, it will drive the guide roller 3032 to slide along the plug shaft 3031, and it can also serve the purpose of guiding, ensuring that the bending angle will not be too large, and in the later stage, the limit spring 3034 will be used to easily reset the moved guide roller 3032 to ensure that the guide roller 3032 is reset and slides to the center position along the plug shaft 3031.

[0051] The implementation principle of the hydraulic cylinder with anti-leakage function of the present invention is as follows:

[0052] When the oil cylinder of the present invention is connected, the external connection interface 1041 is screwed into the connection interface 104 to complete the pipeline connection of the hydraulic oil cylinder 101.

[0053] Then the operator manually turns the handle 2013, which drives the crank 2012 to rotate. The crank 2012 can drive the central connecting block 2011 to rotate, and the connecting block 2011 can drive the coaxial screw shaft 201 to rotate inside the support cover 2022. Finally, under the limit of the limit rod 2021, the rotation of the screw shaft 201 can drive the surface synchronization plate 202 to slide along the limit rod 2021 toward the side wall of the hydraulic cylinder 101.

[0054] When the locking plate 2032 is in the downward direction, the sliding bar 2044 on the pressing plate 2032 pushes the guide slider 2043 to slide along the lower pressing groove 2042. Since the lower pressing groove 2042 is in an inclined state, the guide slider 2043 not only drives the lower pressing rod 205 to move downward, but also the guide slider 2043 can move toward the center of the connecting interface 104. That is, the sliding bar 2044 on the guide slider 2043 slides in the strip groove 2033 at this time, and the sliding bar 2044 slides along the guide rod 2046 at this time, playing a guiding role, and the compression spring 2047 on the guide rod 2046 is compressed synchronously, and the compression spring 2047 facilitates the subsequent reset operation.

[0055] Through the above movement, the lower pressure rod 205 can be driven to slide downward along the pointing groove 2051, and then the lower pressure block 2052 on the lower pressure rod 205 can be moved to above the external interface. In this way, when the screw shaft 201 is not rotating (initial state), the horizontal installation of the external interface 1041 and the connecting interface 104 will not be affected. After the screw shaft 201 rotates, the separation path of the external interface 1041 is blocked, and through the continuous movement of the lower pressure block 2052, the lower pressure block 2052 can be tightly pressed against the surface of the external interface 1041, so that the rotational movement and separation path of the external interface 1041 is restricted, and the purpose of locking is finally achieved, reducing the possibility of hydraulic oil leakage.

[0056] When the lower pressure block 2052 is tightly pressed against the surface of the external interface 1041, the push rod 301 and the push plate 3011 inside the lower pressure block 2052 are squeezed by the external interface 1041, so the push rod 301 is contracted toward the inner wall of the cavity 2053, so the baffle 3012 of the push rod 301 moves upward, and then the return spring 3013 is stretched at this time, which facilitates later reset through the return spring 3013. When the push rod 301 moves upward, the side plate 3014 on the push rod 301 drives the protrusion 3015 to move upward, and the protrusion 3015 will slide along the through groove 3022 at this time, thereby driving the entire rocker arm 3021 to swing, and the rocker arm 3021 drives the synchronous shaft 302 to rotate, and the synchronous shaft 302 can eventually drive the flip bracket 303 to flip, and the flip bracket 303 will fit the guide roller 3032 on the surface tightly to the surface of the oil pipe 1042. When the oil pipe is bent in the later stage, the bending point at this time is transferred from the connection between the oil pipe and the external interface to the surface of the oil pipe. Since the oil pipe is made of rubber, it has better toughness and will not produce gaps when bending, thereby reducing the possibility of hydraulic oil leakage.

[0057] And later, when the oil pipe 1042 shakes, it will drive the guide roller 3032 to slide along the plug shaft 3031, and it can also serve the purpose of guidance to ensure that the bending angle is not too large. In the later stage, the limit spring 3034 is used to facilitate the reset of the moved guide roller 3032 to ensure that the guide roller 3032 is reset to the center position along the plug shaft 3031.

Claims

1. A hydraulic cylinder with a leak-proof function, comprising a hydraulic unit (100), a fixing and locking unit (200) and a positioning and guiding unit (300), characterized in that: The hydraulic unit (100) comprises a hydraulic cylinder (101), the side wall of the hydraulic cylinder (101) is connected to two connection interfaces (104), and the connection interface (104) is screwed with an external connection interface (1041), and the external connection interface (1041) is installed with an oil pipe (1042); The fixed locking unit (200) includes a screw shaft (201), the screw shaft (201) is rotatably mounted on the side wall of the hydraulic cylinder (101), and the screw shaft (201) is placed at the center of two connecting interfaces (104), and a synchronization plate (202) is meshedly arranged on the screw shaft (201), and synchronization rings (203) are installed at both ends of the synchronization plate (202), and the synchronization rings (203) are slidably arranged on the side walls of the corresponding connecting interfaces (104), and three pairs of pressure plates (2032) are installed on the side walls of the synchronization rings (203), and three pairs of partitions (204) are evenly mounted around each of the connecting interfaces (104), and each pair of partitions (204) is provided. The partition (204) is provided with a lower pressure groove (2042), which is a linear groove. The end of the lower pressure groove (2042) close to the hydraulic cylinder (101) is closer to the connection interface (104) than the other end. A guide slider (2043) is slidingly provided inside the lower pressure groove (2042), and the guide slider (2043) is horizontally slidably connected to the side wall of the corresponding pressure plate (2032). A lower pressure rod (205) is installed on the guide slider (2043), and a lower pressure block (2052) is installed on the lower pressure rod (205). The lower pressure block (2052) is placed above the external interface (1041); The positioning guide unit (300) includes a push rod (301), the push rod (301) movably passes through the lower pressing block (2052), a rocker arm (3021) is rotatably installed on the inner wall of the lower pressing block (2052), the rocker arm (3021) is slidably connected to the top of the push rod (301), a flip bracket (303) is installed at the rotation center of the rocker arm (3021), a guide roller (3032) is movably inserted on the flip bracket (303), and a limit spring (3034) is clamped between the guide roller (3032) and the side wall of the flip bracket (303), and an inner groove (3033) is opened on the surface of the guide roller (3032), and the inner groove (3033) corresponds to the side wall of the oil pipe (1042).

2. The hydraulic cylinder with anti-leakage function according to claim 1, characterized in that: An end cover (103) is installed at one end of the hydraulic cylinder (101), and a base (1032) is installed at the other end of the hydraulic cylinder (101). A fixing block (1031) is installed at the bottom of the base (1032), and a circular mounting hole is opened on the fixing block (1031). A piston assembly (102) is movably installed inside the hydraulic cylinder (101), and the piston assembly (102) movably penetrates the end cover (103).

3. The hydraulic cylinder with anti-leakage function according to claim 1, characterized in that: A connecting block (2011) is installed at the end of the screw shaft (201), a crank (2012) is welded on the connecting block (2011), a handle (2013) is installed on the crank (2012), and an anti-slip sleeve is installed on the surface of the handle (2013).

4. The hydraulic cylinder with anti-leakage function according to claim 1, characterized in that: A support cover (2022) is rotatably mounted on the screw shaft (201); a support platform (1011) is mounted on the bottom of the support cover (2022) via bolts; the support platform (1011) and the hydraulic cylinder (101) are integrally cast; a limiting rod (2021) is vertically mounted inside the support cover (2022); the limiting rod (2021) is movably plugged into a synchronous plate (202); and the synchronous plate (202) is located in an internal chamber of the support cover (2022).

5. The hydraulic cylinder with anti-leakage function according to claim 1, characterized in that: A holder (2031) is installed at the end of each pair of pressure plates (2032), and the holder (2031) is slidably engaged with the surface of the synchronization ring (203). A locking bolt is screwed between the synchronization ring (203) and the holder (2031). An outer cover (2041) is installed on the side wall of the partition (204), and the outer cover (2041) is welded to the side wall of the hydraulic cylinder (101). The connection interface (104) movably passes through the outer cover (2041), and the side wall of the pressure plate (2032) is slidably connected to the side wall of the outer cover (2041).

6. The hydraulic cylinder with anti-leakage function according to claim 1, characterized in that: A strip groove (2033) is provided inside the pressure plate (2032), a guide rod (2046) is installed horizontally through the inside of the strip groove (2033), a slide rod (2044) is provided on the guide rod (2046), and the slide rod (2044) is placed in the strip groove (2033), the slide rod (2044) and the side wall of the guide slider (2043) are interconnected, and a compression spring (2047) is sleeved on the guide rod (2046), one end of the compression spring (2047) is clamped on the side wall of the strip groove (2033), and the other end is clamped on the side wall of the slide rod (2044).

7. The hydraulic cylinder with anti-leakage function according to claim 5, characterized in that: The outer cover (2041) is provided with a plurality of pairs of directional grooves (2051), and the extension lines of the plurality of pairs of directional grooves (2051) converge at the center position of the connection interface (104). A downward pressing rod (205) is slidably provided on the directional groove (2051).

8. The hydraulic cylinder with anti-leakage function according to claim 1, characterized in that: A push plate (3011) is installed at the bottom of the push rod (301), and an anti-slip groove is opened at the bottom of the push plate (3011). A baffle (3012) is installed on the top of the push rod (301), and the baffle (3012) is placed in a cavity (2053) opened on the inner wall of the lower pressure block (2052). A return spring (3013) is sleeved on the side wall of the push rod (301) located inside the cavity (2053), and one end of the return spring (3013) is clamped to the bottom of the cavity (2053), and the other end is clamped to the bottom of the baffle (3012).

9. The hydraulic cylinder with anti-leakage function according to claim 1, characterized in that: A through slot (3022) is provided on the rocker arm (3021), a protrusion (3015) is slidably provided inside the through slot (3022), a side plate (3014) is installed on the side wall of the protrusion (3015), and the end of the side plate (3014) is connected to the top of the push rod (301).

10. The hydraulic cylinder with anti-leakage function according to claim 1, characterized in that: The rocker arm (3021) is provided with a synchronous shaft (302) at its rotation center. The synchronous shaft (302) movably passes through the side wall of the lower pressing block (2052). The end of the synchronous shaft (302) is connected to the rotation center of the flip bracket (303). An insert shaft (3031) is installed transversely through the interior of the flip bracket (303). The insert shaft (3031) is movably plugged into the guide roller (3032), and a limit spring (3034) is sleeved on the outside of the insert shaft (3031).

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