CN117738967A - Buffering hydraulic cylinder - Google Patents

Abstract

The invention discloses a buffer hydraulic cylinder, which comprises a cylinder body and a buffer assembly, wherein the cylinder body at least comprises a cylinder barrel, a piston rod which is slidably arranged in the cylinder barrel, and a sealing end cover which is arranged at the opening of the cylinder barrel, and the buffer assembly comprises an oil inlet jack and a side surface which is radially arranged at the bottom of the cylinder barrel; the main buffer hole is axially arranged at the bottom of the cylinder barrel and is communicated with the oil inlet jack; the main buffer rod is arranged at the bottom of the piston rod and is used for being in plug-in fit with the main buffer hole; the auxiliary communication holes are circumferentially and uniformly distributed on the side surface of the main buffer hole; the auxiliary buffer holes are axially arranged at the bottom of the cylinder barrel, and are in one-to-one correspondence with the auxiliary communication holes and are communicated with each other; the one-way valve bodies are arranged in one-to-one correspondence with the auxiliary communication holes; the valve core balls are in one-to-one correspondence with the one-way valve bodies, and the valve core balls are arranged in the corresponding auxiliary communication holes.

Description

Buffering hydraulic cylinder

Technical Field

The application relates to the technical field of machinery, in particular to a buffer hydraulic cylinder.

Background

At present, hydraulic cylinders, which are hydraulic actuators for converting hydraulic energy into mechanical energy and performing linear reciprocating motion (or swinging motion), are known to be required in various fields of engineering machinery, professional automobiles, agricultural machinery and the like. The buffer effect and the buffer structure design of the hydraulic oil cylinder are very important parts of the hydraulic oil cylinder, and directly influence the stability and vibration of the whole equipment and the service life of the oil cylinder.

The buffering mode of the hydraulic oil cylinder is divided into mechanical structure buffering and interception buffering, wherein interception buffering means that a part of oil ways are closed when a piston rod descends, so that the flux of the oil ways is reduced, damping is increased, and an interception buffering effect is achieved. However, the current hydraulic cylinder cannot be adjusted or is complicated in interception effect, so that a buffer hydraulic cylinder capable of being adjusted conveniently needs to be designed.

Disclosure of Invention

The utility model provides a buffering hydraulic cylinder, includes hydro-cylinder body and buffering assembly, the hydro-cylinder body includes cylinder, slidable establishes the piston rod in the cylinder, establishes the sealed end cover in cylinder opening part at least, the buffering assembly includes:

the oil inlet jack is arranged on the side surface of the bottom of the cylinder barrel in the radial direction;

the main buffer hole is axially arranged at the bottom of the cylinder barrel and is communicated with the oil inlet jack;

the main buffer rod is arranged at the bottom of the piston rod and is used for being in plug-in fit with the main buffer hole;

the auxiliary communication holes are circumferentially and uniformly distributed on the side surface of the main buffer hole;

the auxiliary buffer holes are axially arranged at the bottom of the cylinder barrel, and are in one-to-one correspondence with the auxiliary communication holes and are communicated with each other;

the one-way valve bodies are arranged in one-to-one correspondence with the auxiliary communication holes;

the valve core balls are in one-to-one correspondence with the one-way valve bodies, and the valve core balls are arranged in the corresponding auxiliary communication holes.

As a further embodiment, the one-way valve body includes:

the valve body shell comprises a cylindrical valve body arranged at the bottom of the cylinder barrel, an outer cavity formed at the outer end of the cylindrical valve body, an input opening formed at the outer end of the outer cavity, bases with holes circumferentially and uniformly distributed on the inner wall of the outer cavity, and a ball narrow cavity arranged at the inner end of the cylindrical valve body;

the input device is arranged at the input opening;

the transmission devices are in one-to-one correspondence with the belts Kong Ji and are in transmission connection with the input devices;

and the clamping devices are circumferentially and uniformly distributed on the side wall of the ball narrow cavity and are used for clamping the retracted valve core balls.

Further:

the input device comprises a rotary mandrel which is rotatably inserted into the input opening, a driven bevel gear which is formed on the outer side of the rotary mandrel, a transmission ring gear which is rotatably arranged in the cylindrical valve body, and a transmission upper ring which is formed on the upper edge of the transmission ring gear and is in transmission connection with the rotary mandrel.

Further:

the rotating mandrel is fixedly connected with the transmission upper ring through connecting cross bars circumferentially and uniformly distributed on the inner wall of the rotating mandrel.

Further:

the rotating mandrel is in friction transmission connection with the transmission upper ring through a friction assembly;

the friction assembly comprises a limiting ring arranged on the outer wall of the rotating mandrel and above the outer cavity, a narrow diameter jack arranged on the upper side of the rotating mandrel, a wide diameter cavity formed below the narrow diameter jack, a narrow diameter polish rod rotatably arranged in the narrow diameter jack, a torsion round handle arranged at the upper end of the narrow diameter polish rod, an external threaded rod formed below the narrow diameter polish rod and rotatably arranged in the wide diameter cavity, side jacks circumferentially distributed outside the wide diameter cavity, a sliding sleeve ring slidably sleeved on the outer wall of the rotating mandrel, an axial inserted rod circumferentially distributed on the inner wall of the sliding sleeve ring and penetrating through the external threaded rod, and a thread connected with the external threaded rod in a threaded mode.

Thanks to the improved technical scheme, the friction transmission mode provided by the friction assembly can allow a user to excessively rotate the input device through slipping and drive the clamping device to act through the transmission device, even if the clamping device is retracted or extended to the limit and then continues to rotate the input device, the friction circular ring and the upper transmission ring slip, and further mechanical damage caused by excessive movement of the clamping device is avoided.

Further:

the transmission devices are circumferentially and uniformly distributed in the external cavity and comprise a direct transmission shaft and an edge transmission shaft;

the direct transmission shaft comprises a direct mandrel rotatably arranged in the perforated base, a first gear which is arranged above the direct mandrel and meshed with the transmission ring gear, a direct baffle disc arranged below the direct mandrel, and a second gear arranged below the direct baffle disc;

the side transmission shaft comprises a longitudinal connecting hole, a lower clamping hole, a rotatable side rotation shaft, a third gear, a transmission bevel gear and a telescopic opening, wherein the longitudinal connecting hole is formed in the outer edge of the lower end face of the outer cavity, the lower clamping hole is formed below the longitudinal connecting hole, the rotatable side rotation shaft is arranged in the lower connecting hole, the third gear is arranged at the upper end of the side rotation shaft and meshed with the second gear, the transmission bevel gear is arranged at the lower edge of the side transmission shaft, and the telescopic opening is formed in the inner side of the lower clamping hole.

Further:

the clamping device comprises a rotating assembly and a telescopic assembly;

the rotating assembly comprises an inner threaded pipe rotatably arranged in the lower clamping hole, a clamping bevel gear formed on the inner side of the inner threaded pipe and meshed with the transmission bevel gear, a limiting ring groove formed on the outer wall of the inner threaded pipe, and a limiting convex ring formed on the inner side of the lower clamping hole and matched with the limiting ring groove;

the telescopic assembly comprises a rotation stopping plug arranged on the inner wall of the telescopic opening, an externally threaded rod meshed with the internally threaded tube, and a rotation stopping side hole axially arranged on the outer wall of the externally threaded rod and meshed with the rotation stopping plug.

Further:

the auxiliary communication hole comprises a narrow hole section close to one side of the main buffering hole, a wide hole section far away from one side of the main buffering hole and an excessive section connected between the narrow hole section and the wide hole section;

in the state of the oil cylinder body being longitudinally arranged, the lower end face of the transition section is in a state of being close to the narrow hole Duan Yice and higher than being close to the wide hole Duan Yice.

Advantageous effects

The hydraulic oil cylinder is characterized in that the oil cylinder body is buffered through the buffer assembly, and the buffer assembly is provided with a main buffer hole and an auxiliary buffer hole to realize two-stage buffering.

A check valve body cooperation case ball, can switch the break-make of the auxiliary communication hole that corresponds, through the quantity of the auxiliary communication hole that the adjustment can circulate, can adjust the holistic shutoff effect of device:

after the valve core ball is fixed in the one-way valve body, the auxiliary communication hole can smoothly run on the descending and ascending strokes of the piston rod, and particularly, the passage can play a role in intercepting while keeping oil passing when the piston rod descends;

when the valve core ball is outside the one-way valve body, the valve core ball stops the auxiliary communication hole when the piston rod descends, and at the moment, no liquid flows through the auxiliary communication hole, and no interception function exists.

Description of the drawings:

FIG. 1 is a schematic diagram of one embodiment of the cushion hydraulic cylinder.

FIG. 2 is a cross-sectional view of one embodiment of the cushion hydraulic cylinder.

Fig. 3 is a partial cross-sectional view of an embodiment of the hydraulic ram in a longitudinally disposed condition.

Fig. 4 is a partial cross-sectional view of another embodiment of the hydraulic ram in a longitudinally disposed condition.

Fig. 5 is a cross-sectional view of an embodiment of the hydraulic ram in a landscape orientation.

Fig. 6 is a cross-sectional view of another embodiment of the hydraulic ram in a landscape orientation.

Fig. 7 is a partial view of the partial cross-sectional view of fig. 4.

Fig. 8 is a partial view of the partial cross-sectional view of fig. 4.

Fig. 9 is an enlarged schematic view of an embodiment of portion a of fig. 5.

Fig. 10 is an enlarged schematic view of another embodiment of the portion a of fig. 5.

Fig. 11 is an enlarged schematic view of still another embodiment of the portion a in fig. 5.

Fig. 12 is an enlarged schematic view of an embodiment of portion B of fig. 6.

Fig. 13 is an enlarged schematic view of another embodiment of section B of fig. 6.

Fig. 14 is an enlarged schematic view of still another embodiment of the portion B of fig. 6.

Fig. 15 is an enlarged schematic view of the portion C in fig. 9.

In the figure:

the hydraulic cylinder comprises an oil cylinder body, a m1. cylinder barrel, a 2 piston rod, a 3 sealing end cover, an n buffering assembly, a, an oil inlet jack, b, a main buffering hole, c, a main buffering rod, d, an auxiliary communication hole, e, an auxiliary buffering hole, f, a one-way valve body, g, a valve core ball, h, a driving assembly, h1. fixing convex rings, h2. buffering sleeves, h3. blocking tail rings and h4. driving bevel gears;

1. valve body housing, 11, cylindrical valve body, 12, external chamber, 13, input opening, 14, strap Kong Ji, 15, ball narrow cavity;

2. the input device, 21, the rotating mandrel, 22, the driven bevel gear, 23, the driving ring gear, 24, the driving upper ring, 25, the connecting cross rod, 26, the friction assembly, 26a, the limiting circular ring, 26b, the narrow diameter jack, 26c, the wide diameter cavity, 26d, the narrow diameter polished rod, 26e, the torsion circular handle, 26f, the external threaded rod, 26g, the side jack, 26h, the sliding collar, 26i, the axial inserted link, 26j, the friction pressure spring, 26k, the friction circular ring and 26l, the side inserted key.

3. The transmission device 31, a direct transmission shaft 31a, a direct mandrel 31b, a first gear 31c, a direct baffle disc 31d, a second gear 32, an edge transmission shaft 32a, a longitudinal connecting hole 32b, a lower clamping hole 32c, an edge transmission group 32d, a third gear 32e, a transmission bevel gear 32f and a telescopic opening.

4. The clamping device comprises a clamping device body, a rotating assembly body, a 41a, an internally threaded pipe, a 41b, a clamping bevel gear body, a 41c, a limiting annular groove, a 41d, a limiting convex ring, a 42, a telescopic assembly body, a 42a anti-rotation plug body, a 42b, an externally threaded rod body and a 42c anti-rotation side hole.

Detailed Description

The utility model provides a buffering hydraulic cylinder, includes hydro-cylinder body m and buffering assembly n, hydro-cylinder body m includes cylinder m1 at least, slidable establish in cylinder m1 piston rod m2, establish the seal end cover m3 in cylinder m1 opening part, buffering assembly n includes:

the oil inlet jack a is arranged on the side surface of the bottom of the cylinder barrel m1 in the radial direction;

the main buffer hole b is axially arranged at the bottom of the cylinder barrel m1 and is communicated with the oil inlet jack a;

the main buffer rod c is arranged at the bottom of the piston rod m2 and is used for being in plug-in fit with the main buffer hole b;

auxiliary communication holes d are circumferentially and uniformly distributed on the side surface of the main buffer hole b;

the auxiliary buffer holes e are axially formed in the bottom of the cylinder barrel m1, and the auxiliary buffer holes 3 are in one-to-one correspondence with the auxiliary communication holes d and are communicated with each other;

the one-way valve bodies f are arranged in one-to-one correspondence with the auxiliary communication holes d;

the valve core balls g are in one-to-one correspondence with the one-way valve bodies f, and the valve core balls g are arranged in the corresponding auxiliary communication holes d.

As a further embodiment, the check valve body f includes:

the valve body shell 1 comprises a cylindrical valve body 11 arranged at the bottom of the cylinder barrel m1, an outer cavity 12 formed at the outer end of the cylindrical valve body 11, an input opening 13 formed at the outer end of the outer cavity 12, perforated bases 14 circumferentially and uniformly distributed on the inner wall of the outer cavity 12, and a ball narrow cavity 15 arranged at the inner end of the cylindrical valve body 11;

an input device 2 provided at the input opening 13;

the transmission devices 3 are in one-to-one correspondence with the perforated bases 14, and the transmission devices 3 are in transmission connection with the input devices 2;

the clamping devices 4 are circumferentially and uniformly distributed on the side wall of the ball narrow cavity 15 and are used for clamping the retracted valve core balls g.

Further:

the input device 2 comprises a rotary mandrel 21 rotatably inserted into the input opening 13, a driven bevel gear 22 formed on the outer side of the rotary mandrel 21, a transmission ring gear 23 rotatably arranged in the cylindrical valve body 11, and a transmission upper ring 24 formed on the upper edge of the transmission ring gear 23 and in transmission connection with the rotary mandrel 21.

Further:

the rotating mandrel 21 is fixedly connected with the transmission upper ring 24 through connecting cross bars 25 circumferentially and uniformly distributed on the inner wall of the rotating mandrel.

Further:

the rotating mandrel 21 is in friction transmission connection with the transmission upper ring 24 through a friction assembly 26;

the friction assembly 26 comprises a limit circular ring 26a arranged on the outer wall of the rotating mandrel 21 and above the outer cavity 21, a narrow diameter inserting hole 26b arranged on the outer wall of the rotating mandrel 21, a wide diameter cavity 26c formed below the narrow diameter inserting hole 26b, a narrow diameter polish rod 26d rotatably arranged in the narrow diameter inserting hole 26b, a torsion circular handle 26e arranged at the upper end of the narrow diameter polish rod 26d, an external threaded rod 26f formed below the narrow diameter polish rod 26d and rotatably arranged in the wide diameter cavity 26c, side inserting holes 26g circumferentially distributed outside the wide diameter cavity 26c, a sliding collar 26h slidably sleeved on the outer wall of the rotating mandrel 21, an axial inserting rod 26i circumferentially distributed on the inner wall of the sliding collar 26h and penetrating through the external threaded rod 26f, a thread spirally connected with the external threaded rod 26f, a friction pressing spring 26j arranged around the outer wall of the rotating mandrel 21 and positioned above the sliding collar 26h, a friction pressing spring 21 j slidably sleeved on the outer wall of the sliding collar 26k and a transmission circular ring 26k arranged on the inner wall of the friction collar 26k.

Thanks to the improved solution described above, the friction transmission manner provided by the friction assembly 26 allows the user to rotate the input device excessively and drive the clamping device 4 to act through the transmission device 3 by slipping, even if the clamping device 4 is retracted or extended to the limit and then continues to rotate the input device 2, the friction ring 26k and the upper transmission ring 24 slip, so as to avoid mechanical damage caused by excessive movement of the clamping device 4.

Further:

the transmission devices 3 are circumferentially and uniformly distributed in the outer cavity 12 and comprise a direct transmission shaft 31 and an edge transmission shaft 32;

the direct transmission shaft 31 comprises a direct mandrel 31a rotatably arranged in the perforated base 14, a first gear 31b arranged above the direct mandrel 31a and meshed with the transmission ring gear 23, a direct baffle disc 31c arranged below the direct mandrel 31a, and a second gear 31d arranged below the direct baffle disc 31 c;

the side drive shaft 32 includes a vertical connecting hole 32a provided at the outer edge of the lower end surface of the outer chamber 12, a lower holding hole 32b provided below the vertical connecting hole 32a, a side rotation shaft 32c rotatably provided in the lower connecting hole 32a, a third gear 32d provided at the upper end of the side rotation shaft 32c and engaged with the second gear 31d, a drive bevel gear 32e provided at the lower edge of the side drive shaft 32c, and a telescopic opening 32f provided inside the lower holding hole 32b.

Further:

the clamping device 4 comprises a rotating assembly 41 and a telescopic assembly 42;

the rotating assembly 41 comprises an internal thread tube 41a rotatably arranged in the lower clamping hole 32b, a clamping bevel gear 41b formed on the inner side of the internal thread tube 41a and meshed with the transmission bevel gear 32e, a limit ring groove 41c formed on the outer wall of the internal thread tube 41a, and a limit convex ring 41d formed on the inner side of the lower clamping hole 32b and matched with the limit ring groove 41 c;

the telescopic assembly 42 includes a rotation stopping plug 42a provided on an inner wall of the telescopic opening 32f, an externally threaded rod 42b engaged with the internally threaded tube 41a, and a rotation stopping side hole 42c provided on an outer wall of the externally threaded rod 42b in an axial direction and engaged with the rotation stopping plug 42a.

Further:

the auxiliary communication hole d comprises a narrow hole section d1 close to one side of the main buffer hole b, a wide hole section d2 far away from one side of the main buffer hole b, and an excessive section d3 for connecting the narrow hole section d1 and the wide hole section d 2;

in the vertical state of the cylinder body m, the lower end surface of the transition section d3 is higher than the side close to the narrow hole section d1 than the side close to the wide hole section d 2.

The scheme also discloses a buffering method for buffering the hydraulic cylinder, which comprises the following steps:

step 1, intercepting under normal state:

as shown in figures 1-4 of the drawings,

normally, the oil cylinder body m is longitudinally arranged;

the piston rod m2 moves in the cylinder barrel m1 to drive the main buffer rod c to be inserted into the main buffer hole b;

the hydraulic oil in the cylinder barrel m1 cannot flow out after passing through the main buffer hole b and the oil inlet jack a;

can only flow out through the auxiliary buffer hole e and the auxiliary communication hole d and then flow out through the oil inlet jack a, and obvious interception effect is generated in the process, so that the buffer effect is achieved.

As a further embodiment of the method of the present invention,

still include step 2, adjust the effect of closure one by one:

referring to the drawings in fig. 5 to 6 of the specification, it can be seen that:

step 2.1, preconditioning the valve core ball g:

the cylinder body m is transversely arranged, and the one-way valve body f to be regulated is positioned right below;

the valve core ball g is influenced by the action of an oil belt and the dead weight and enters the upper end of the ball narrow cavity 15, but is blocked by the clamping device 4 and cannot enter the ball narrow cavity 15;

step 2.2, the clamping device 4 is retracted:

the driven bevel gear 22 and the rotating mandrel 21 are rotated, and the friction assembly 26 drives the transmission upper ring 24 and the transmission ring teeth 23 to rotate through friction transmission between the friction circular ring 26k and the transmission upper ring 24;

the transmission ring gear 23 drives the direct transmission shaft 31 and the side transmission shaft 32 to rotate;

the transmission bevel gear 32e drives the clamping bevel gear 41b and the internal threaded pipe 41a to rotate;

the inner threaded tube 41a drives the telescopic assembly 42 to retract;

step 2.3, the valve core ball g enters the cavity;

the blocking of the clamping device 4 is lost, and the valve core ball g smoothly enters the ball narrow cavity 15;

step 2.4, locking the valve core ball g:

rotating the driven bevel gear 22 and the rotating mandrel 21 in the direction opposite to the direction in the step 2.2, wherein the internally threaded tube 41a drives the telescopic assembly 42 to move so as to clamp the valve core ball g in the ball narrow cavity 15;

step 2.5, adjusting the number of the effective check valve bodies f:

for the check valve body and the valve core ball g which are operated in the step 2.2, when the piston rod m2 moves towards the bottom of the cylinder barrel m1, the oil can smoothly flow through the auxiliary buffer hole e, the auxiliary communication hole d and the oil inlet jack a, and the passage flow is smaller than that of the main buffer hole b, so that the intercepting buffer effect can be achieved.

It should be noted that, the buffer assembly n further includes a driving assembly h, where the driving assembly h includes a fixed convex ring h1 provided on an outer wall of the cylinder m1, a buffer sleeve h2 rotatably sleeved on the fixed convex ring h1, a stop tail ring h3 formed on one side of the buffer sleeve h2 away from the one-way valve f, a driving bevel gear h4 formed on one side of the buffer sleeve h2 close to the one-way valve f and engaged with the driven bevel gear 22, and a reset compression spring h5 formed in the buffer sleeve h2 and located between the fixed convex ring h1 and the driving bevel gear h4.

Thanks to the improved technical scheme, the scheme also provides a buffering method for synchronous adjustment, which comprises the following steps:

step 3, quickly adjusting to the minimum interception effect:

step 3.1, the clamping device 4 of all the valve core bodies g is retracted:

as shown in the attached figures 7-8 of the specification, the oil cylinder body m is longitudinally arranged in an upward posture of the sealing end cover m 3;

the buffer sleeve h2 and the drive bevel gear h4 are rotated to synchronously drive the driven bevel gears 22 of all the one-way valve bodies f to rotate;

the corresponding rotating mandrel 21 is driven to rotate, and the corresponding friction assembly 26 drives the transmission upper ring 24 and the transmission ring gear 23 to rotate through friction transmission between the friction circular ring 26k and the transmission upper ring 24;

the transmission ring gear 23 drives the direct transmission shaft 31 and the side transmission shaft 32 to rotate;

the transmission bevel gear 32e drives the clamping bevel gear 41b and the internal threaded pipe 41a to rotate;

the inner threaded tube 41a drives the telescopic assembly 42 to retract;

step 3.2, all valve core balls g enter the cavity:

because the lower end surface of the transition section d3 is higher than the side close to the narrow hole section d1 and higher than the side close to the wide hole section d2 in the vertical state of the oil cylinder body m, the valve core ball g slides downwards into the ball narrow cavity 15 along the lower end surface of the transition section d3 under the action of gravity;

meanwhile, the cylinder body m is rotated manually or mechanically, and the valve core ball g is acted by centrifugal force and can slide into the ball narrow cavity 15 more effectively;

step 3.3, locking all valve core balls g:

in the direction opposite to the direction in the step 3.1, the buffer sleeve h2 and the drive bevel gear h4 are rotated to synchronously drive the driven bevel gears 22 of all the check valve bodies f to rotate, and finally drive the internal threaded pipes 41a of all the check valve bodies f to rotate, so as to drive the telescopic assembly 42 to extend, and clamp the valve core ball g in the ball narrow cavity 15;

step 3.4, achieving the minimum interception effect:

at this time, all passages of the auxiliary buffer hole e, the auxiliary communication hole d and the oil inlet jack a can smoothly circulate when the piston rod m2 moves to the bottom of the cylinder barrel m1, so that a shutoff effect is achieved, but the shutoff buffer effect is reduced due to the fact that all passages are opened, and the minimum shutoff buffer effect is achieved.

The check valve body f is provided with 3 check valves.

A sealing gasket is arranged between the rotary mandrel 21 and the input opening 13 between the cylindrical valve body 11 and the auxiliary communication hole d;

as a further embodiment, a sealing gasket is disposed between the narrow diameter insertion hole 26b and the narrow diameter polish rod 26d.

Claims (8)

1. The utility model provides a buffering hydraulic cylinder, includes hydro-cylinder body (m) and buffering assembly (n), hydro-cylinder body (m) include cylinder (m 1), slidable establish piston rod (m 2) in cylinder (m 1), establish sealed end cover (m 3) at cylinder (m 1) opening part, its characterized in that at least: the buffer assembly (n) comprises:

an oil inlet jack (a) arranged radially on the side surface of the bottom of the cylinder barrel (m 1);

the main buffer hole (b) is axially arranged at the bottom of the cylinder barrel (m 1) and is communicated with the oil inlet jack (a);

the main buffer rod (c) is arranged at the bottom of the piston rod (m 2) and is used for being in plug-in fit with the main buffer hole (b);

auxiliary communication holes (d) are circumferentially distributed on the side surface of the main buffer hole (b);

the auxiliary buffer holes (e) are axially arranged at the bottom of the cylinder barrel (m 1), and the auxiliary buffer holes (3) are in one-to-one correspondence with the auxiliary communication holes (d) and are communicated with each other;

the one-way valve bodies (f) are arranged in one-to-one correspondence with the auxiliary communication holes (d);

the valve core balls (g) are in one-to-one correspondence with the one-way valve bodies (f), and the valve core balls (g) are arranged in the corresponding auxiliary communication holes (d).

2. A cushion hydraulic ram as claimed in claim 1, wherein:

the one-way valve body (f) includes:

the valve body shell (1) comprises a cylindrical valve body (11) arranged at the bottom of the cylinder barrel (m 1), an outer cavity (12) formed at the outer end of the cylindrical valve body (11), an input opening (13) formed at the outer end of the outer cavity (12), belts Kong Ji (14) circumferentially distributed on the inner wall of the outer cavity (12) and a ball narrow cavity (15) arranged at the inner end of the cylindrical valve body (11);

an input device (2) arranged at the input opening (13);

the transmission devices (3) are in one-to-one correspondence with the belts Kong Ji (14), and the transmission devices (3) are in transmission connection with the input devices (2);

the clamping devices (4) are circumferentially and uniformly distributed on the side wall of the ball narrow cavity (15) and used for clamping the retracted valve core balls (g).

3. A cushion hydraulic ram as claimed in claim 2, wherein:

the input device (2) comprises a rotary mandrel (21) which is rotatably inserted into the input opening (13), a driven bevel gear (22) which is formed on the outer side of the rotary mandrel (21), a transmission ring gear (23) which is rotatably arranged in the cylindrical valve body (11), and a transmission upper ring (24) which is formed on the upper edge of the transmission ring gear (23) and is in transmission connection with the rotary mandrel (21).

4. A buffer hydraulic cylinder as claimed in claim 3, wherein:

the rotating mandrel (21) is fixedly connected with the transmission upper ring (24) through connecting cross bars (25) which are circumferentially and uniformly distributed on the inner wall of the rotating mandrel.

5. The cushion hydraulic cylinder according to claim 4, wherein:

the rotating mandrel (21) is in friction transmission connection with the transmission upper ring (24) through a friction assembly (26);

the friction assembly (26) comprises a limit circular ring (26 a) arranged on the outer wall of the rotating mandrel (21) and arranged above the outer cavity (21), a narrow diameter jack (26 b) arranged on the upper side of the rotating mandrel (21), a wide diameter cavity (26 c) formed below the narrow diameter jack (26 b), a narrow diameter polish rod (26 d) rotatably arranged in the narrow diameter jack (26 b), a torsion circular handle (26 e) arranged at the upper end of the narrow diameter polish rod (26 d), an external threaded rod (26 f) which is formed below the narrow diameter polish rod (26 d) and rotatably arranged in the wide diameter cavity (26 c), a sliding lantern ring (26 h) circumferentially uniformly distributed on the outer wall of the rotating mandrel (21) and a shaft inserting rod (26 i) rotatably arranged on the inner wall of the sliding lantern ring (26 h) and penetrating through the external threaded rod (26 f), a compression spring (26 j) rotatably arranged on the outer wall of the rotating mandrel (26 k) and comprising a compression spring (26 j) and a compression spring (26 j) rotatably arranged on the outer wall of the rotating mandrel (26 j) and positioned on the rotating mandrel (26 j) and the outer wall of the rotating mandrel (26 j), and the side inserting key (26 l) is arranged on the inner wall of the friction circular ring (26 k) and is inserted into the side inserting hole (26 g), and the friction circular ring (26 k) is in friction transmission connection with the transmission upper ring (24).

6. The cushion hydraulic cylinder according to claim 5, wherein:

the transmission devices (3) are circumferentially and uniformly distributed in the outer cavity (12) and comprise a direct transmission shaft (31) and an edge transmission shaft (32);

the direct transmission shaft (31) comprises a direct mandrel (31 a) rotatably arranged in the belt Kong Ji (14), a first gear (31 b) arranged above the direct mandrel (31 a) and meshed with the transmission ring gear (23), a direct baffle disc (31 c) arranged below the direct mandrel (31 a) and a second gear (31 d) arranged below the direct baffle disc (31 c);

the side transmission shaft (32) comprises a longitudinal connecting hole (32 a) formed in the outer edge of the lower end face of the outer cavity (12), a lower clamping hole (32 b) formed below the longitudinal connecting hole (32 a), a rotatable side rotation shaft (32 c) formed in the lower connecting hole (32 a), a third gear (32 d) formed at the upper end of the side rotation shaft (32 c) and meshed with the second gear (31 d), a transmission bevel gear (32 e) formed in the lower edge of the side transmission shaft (32 c), and a telescopic opening (32 f) formed in the inner side of the lower clamping hole (32 b).

7. The cushion hydraulic cylinder according to claim 6, wherein:

the clamping device (4) comprises a rotating assembly (41) and a telescopic assembly (42);

the rotating assembly (41) comprises an inner threaded pipe (41 a) rotatably arranged in the lower clamping hole (32 b), a clamping bevel gear (41 b) formed on the inner side of the inner threaded pipe (41 a) and meshed with the transmission bevel gear (32 e), a limiting ring groove (41 c) formed on the outer wall of the inner threaded pipe (41 a), and a limiting convex ring (41 d) formed on the inner side of the lower clamping hole (32 b) and matched with the limiting ring groove (41 c);

the telescopic assembly (42) comprises a rotation stopping plug (42 a) arranged on the inner wall of the telescopic opening (32 f), an externally threaded rod (42 b) meshed with the internally threaded tube (41 a), and a rotation stopping side hole (42 c) axially arranged on the outer wall of the externally threaded rod (42 b) and meshed with the rotation stopping plug (42 a).

8. A cushion hydraulic cylinder according to any one of claims 2-7, wherein:

the auxiliary communication hole (d) comprises a narrow hole section (d 1) close to one side of the main buffer hole (b), a wide hole section (d 2) far away from one side of the main buffer hole (b), and an excessive section (d 3) for connecting the narrow hole section (d 1) and the wide hole section (d 2);

in the vertical state of the oil cylinder body (m), the lower end surface of the transition section (d 3) is higher than the side close to the narrow hole section (d 1) than the side close to the wide hole section (d 2).