Hydraulic distributor with balanced guide rod anti-shake function and method thereof

Abstract

The present application relates to the technical fields of hydraulic distributor, and disclose a hydraulic distributor with balance guide rod anti-shaking function and method thereof, including: the shell is slidably connected with the valve core in the shell, the other end of the shell is provided with the shock absorbing assembly; The shock absorbing assembly includes a shell, a damping tube is fixedly installed in the shell, and the end of the valve core away from the driver is fixedly connected with a guide rod; The piston is provided with a first adjusting part, the first adjusting part includes a swivel ring, the swivel ring is rotatably connected in the piston, and a plurality of valve blocks are fixedly connected to the outer wall of the swivel ring. Through the setting of the shock absorbing assembly, when the valve core is impacted and shaken, the damping oil flows first to form a basic damping force to preliminarily buffer, then the compressed nitrogen absorbs energy to realize secondary buffering, and the first spring and nitrogen can assist the component reset, realize double progressive shock absorbing, and alleviate the shaking of the valve core.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic distributor, in particular to a hydraulic distributor with balanced guide rod anti-shaking function and method thereof. BACKGROUND

[0002] The hydraulic distributor is a core control element in the hydraulic system, which is widely used in the fields of engineering machinery, agricultural machinery, machine tool equipment, etc., and is mainly used for controlling the extension, pressure maintaining and contraction actions of the hydraulic cylinder to realize the precise control of the working mechanism of the equipment. The existing hydraulic distributor is usually composed of a shell, a valve core, a driving part and an oil port, etc. The shell serves as a mounting base and is internally provided with a plurality of oil channels that are in communication with each other. The oil channels are connected with the oil tank, the hydraulic pump and the execution element through the oil port. The driving part is usually an electromagnetic coil, a manual control lever or a hydraulic pilot mechanism, which is used to drive the valve core to realize the switching of the oil channel, so that the hydraulic oil enters the rodless chamber or the rod chamber of the hydraulic cylinder according to the preset path, and the execution element is driven to act, thereby completing the lifting, stretching, rotating and other work functions of the working mechanism of the equipment.

[0003] However, the existing technology has the following problems:

[0004] In the existing hydraulic distributor, the valve core may be shaken due to the pressure impact of the hydraulic system caused by the oil channel switching, load fluctuation or external force, which may cause the instability of the oil channel switching and flow regulation, and may cause the hydraulic rod to stretch and contract at a slow speed or to be positioned off, thereby reducing the work precision. Long-term shaking of the valve core may also increase the friction and wear between the valve core and the shell, thereby shortening the service life of the components. SUMMARY

[0005] The present application aims to solve the above problems and provides a hydraulic distributor with balanced guide rod anti-shaking function and method thereof. The defects of the existing valve core shaking that may cause the instability of the oil channel switching and flow regulation, increase the friction and wear between the valve core and the shell, and shorten the service life of the components are overcome, as described in detail below.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] The application provides a hydraulic distributor with a balanced guide rod anti-shaking function, which comprises a shell, a valve core is slidably connected in the shell, a driver is fixedly installed at one end of the shell, an output end of the driver is connected with the valve core, and a vibration damping assembly is arranged at the other end of the shell; the vibration damping assembly comprises a shell body, the shell body is fixedly connected at the end of the shell body away from the driver, a damping pipe is fixedly installed in the shell body, a guide rod is fixedly connected at the end of the valve core away from the driver, a first spring is connected between the end of the valve core away from the driver and the inner wall of the shell body, a piston is slidably connected to the inner wall of the damping pipe, and the damping pipe is filled with damping oil; a first adjusting part is arranged on the piston, the first adjusting part comprises a swivel ring, the swivel ring is rotatably connected in the piston, a plurality of valve blocks are fixedly connected to the outer wall of the swivel ring, a plurality of oil holes are formed in the piston, and the plurality of valve blocks can adjust the opening degrees of the plurality of oil holes according to the impact force received by the guide rod.

[0008] Preferably, a first oil way, a second oil way, a third oil way, a fourth oil way, a fifth oil way and a sixth oil way are installed on the shell, the first oil way, the second oil way, the third oil way and the fourth oil way are arranged side by side in sequence, two shoulders are fixedly installed on the outer wall of the valve core, the second oil way is connected with an oil outlet pipeline of an oil tank, the fourth oil way is connected with an oil return pipeline of the oil tank, the first oil way is connected with a rod cavity of a hydraulic cylinder, the third oil way is connected with a non-rod cavity of the hydraulic cylinder, the fifth oil way and the sixth oil way are communicated, the sixth oil way and the fourth oil way are communicated, and the first oil way is communicated with the fifth oil way.

[0009] Preferably, the guide rod is slidably connected with the piston, a second spring is connected between the end of the guide rod away from the valve core and the piston, a plurality of sliding tongues are fixedly connected to the inner side of the swivel ring, a plurality of threaded grooves are formed in the guide rod, the plurality of sliding tongues are slidably connected with the plurality of threaded grooves respectively, the guide rod and the swivel ring are relatively moved to drive the swivel ring to rotate through the cooperation of the plurality of threaded grooves and the plurality of sliding tongues, and the swivel ring drives the plurality of valve blocks to rotate when the swivel ring rotates, so that the plurality of valve blocks adjust the opening degrees of the plurality of oil holes respectively.

[0010] Preferably, a floating plug is slidably connected to the inner wall of the damping pipe, and the floating plug and the end of the damping pipe away from the valve core are filled with nitrogen.

[0011] Preferably, a sealing part is arranged on the piston, the sealing part comprises a sealing ring, an installation groove is formed in the outer wall of the piston, the sealing ring is sleeved in the installation groove of the piston, and the outer side of the sealing ring abuts against the inner wall of the damping pipe.

[0012] As preferred, the sealing part further comprises two top rings, both of which are sleeved in the mounting groove of the piston and are mirror-imaged, a V-shaped groove is formed in the inner side of the sealing ring, the top ring is provided with an outer inclined surface and an inner inclined surface, the outer inclined surfaces of the two top rings are embedded in the V-shaped groove of the sealing ring, a plurality of top blocks are slidingly connected to the inner wall of the piston, the top block is provided with an arc surface and a sharp surface, the sharp surfaces of the plurality of top blocks are embedded between the inner inclined surfaces of the two top rings, the arc surfaces of the plurality of top blocks are located on the movement trajectories of the plurality of valve blocks, when the valve block moves, the top block can be driven to move away from the rotating ring by the arc surface, and the movement of the top block away from the rotating ring drives the two top rings to move away from each other and the rotating ring by the sharp surface, so as to increase the pressure of the outer side of the sealing ring on the inner wall of the damping tube and the pressure of the two sides of the sealing ring on the mounting groove of the piston.

[0013] As preferred, the piston is further provided with a second adjusting part, the second adjusting part comprises a mounting ring, the mounting ring is rotationally connected to the piston, a plurality of stop blocks are fixedly connected to the mounting ring, the plurality of stop blocks are located beside the plurality of oil holes respectively, a plurality of protrusions are fixedly installed on the piston, the protrusions are fixedly connected with elastic sheets, one end of the elastic sheet away from the protrusion is fixedly connected with the mounting ring, the elastic sheet is made of shape memory alloy material and has elasticity, and when the damping oil in the damping tube is heated, the plurality of elastic sheets are deformed to drive the mounting ring to rotate, and the mounting ring drives the plurality of stop blocks to adjust the opening degrees of the plurality of oil holes when rotating.

[0014] As preferred, the damping tube is provided with a heat dissipation part, the heat dissipation part comprises a heat conduction ring and a heat dissipation ring, the heat conduction ring is rotationally connected to the inner wall of the damping tube, the heat dissipation ring is fixedly connected to the outer wall of the damping tube, a plurality of heat conduction rods are fixedly connected to the inner side of the heat conduction ring, the heat dissipation ring is located outside the heat conduction ring, the plurality of heat conduction rods are used to absorb the heat of the damping oil in the damping tube and transfer the heat to the heat dissipation ring through the heat conduction ring and the outer wall of the damping tube, and a plurality of fins are connected to the outer wall of the heat dissipation ring.

[0015] As preferred, the heat dissipation part further comprises a plurality of ball head connecting rods, a plurality of first ball sleeves are fixedly installed on the heat conduction ring, a plurality of second ball sleeves are fixedly connected to the floating plug, the plurality of ball head connecting rods are located between the heat conduction ring and the floating plug, one end of each of the plurality of ball head connecting rods is movably sleeved with a first ball sleeve, and the other end of each of the plurality of ball head connecting rods is movably sleeved with a second ball sleeve, and the floating plug can drive the heat conduction ring to rotate through the plurality of ball head connecting rods when moving.

[0016] A hydraulic distribution method with a balance guide rod anti-shake function, comprising the following steps:

[0017] Step one: drive the hydraulic cylinder to extend, use the driver to drive the valve core to move to the rightmost position, at this time the two shoulders block the first and fourth oil paths, the second and third oil paths are connected, at this time the oil tank will deliver hydraulic oil to the hydraulic cylinder rodless cavity through the oil tank outlet pipeline, the second oil path, the third oil path in turn, after the oil pressure in the hydraulic cylinder rodless cavity rises, the hydraulic rod is driven to extend, the hydraulic oil in the hydraulic cylinder rod cavity flows back to the oil tank through the first oil path, the fifth oil path, the sixth oil path, the fourth oil path and the oil tank return pipeline in turn.

[0018] Step two: drive the hydraulic cylinder to maintain pressure, use the driver to drive the valve core to move to the centermost position, at this time the two shoulders block the first and third oil paths, so that the hydraulic oil in the first oil path to the hydraulic cylinder rod cavity is closed, and the hydraulic oil in the third oil path to the hydraulic cylinder rodless cavity is closed, at this time the hydraulic oil in the hydraulic cylinder maintains the current pressure, and the hydraulic rod maintains the current state.

[0019] Step three: drive the hydraulic cylinder to retract, use the driver to drive the valve core to move to the leftmost position, at this time the two shoulders block the fifth and third oil paths, the first and second oil paths are connected, at this time the oil tank will deliver hydraulic oil to the hydraulic cylinder rod cavity through the oil tank outlet pipeline, the second oil path and the first oil path in turn, after the oil pressure in the hydraulic cylinder rod cavity rises, the hydraulic rod is driven to retract, the hydraulic oil in the hydraulic cylinder rodless cavity flows back to the oil tank through the third oil path, the fourth oil path and the oil tank return pipeline in turn.

[0020] Step four: the damping assembly suppresses the whole process of shaking, if the hydraulic system produces pressure impact due to oil path switching, load fluctuation or external force, the valve core is shaken, the valve core drives the guide rod to impact axially, the guide rod transmits the impact force to the piston in the damping pipe, the piston slides along the inner wall of the damping pipe, the damping oil in the damping pipe is forced to flow through the oil hole, at this time the rotating ring automatically rotates according to the impact force received by the guide rod, the greater the impact force, the greater the area of the valve block shielding the oil hole, the smaller the effective flow area of the oil hole, the greater the flow resistance of the damping oil, the greater the damping force generated, which quickly offsets the impact energy, when the impact force weakens, the rotating ring rotates in the opposite direction, the valve block reduces the shielding, the opening degree of the oil hole restores, the damping force adapts to the smooth movement requirement of the valve core, and the smoothness of the hydraulic rod extension and retraction action is guaranteed.

[0021] Beneficial effects are that:

[0022] 1. The hydraulic distributor with balanced guide rod anti-shaking function, through the setting of the damping assembly, when the valve core is shaken by impact, the basic damping force is first formed by the damping oil flow to preliminarily buffer, and then the energy is absorbed by compressed nitrogen to realize secondary buffering, and the first spring and nitrogen can assist the component to reset, realizing double progressive damping, relieving the shaking of the valve core, guaranteeing the stability of oil path switching and flow regulation, and reducing the friction and wear between the valve core and the machine shell as much as possible.

[0023] 2、The hydraulic distributor with balance guide rod anti-shake function, through the setting of the first adjusting part, when the guide rod is impacted, the rotating ring is driven to rotate through the cooperation of the thread groove and the slide tongue, the valve block self-adapts to adjust the oil hole opening degree according to the impact force, the greater the impact force, the smaller the oil hole opening degree, the stronger the damping force, and when the impact force is weakened, the opening degree is restored and the damping force is adapted, the dynamic matching of the damping force and the impact strength is realized, and the self-adaptive buffering performance of the vibration damping assembly is significantly improved; through the setting of the second adjusting part, when the damping oil is heated and the viscosity is reduced due to long-time work of the vibration damping assembly, the shape memory alloy spring plate is deformed with the temperature rise, the mounting ring and the stop block are driven to rotate, the oil hole is shielded to reduce the effective flow area, and then the damping force is increased, the damping force loss caused by the oil temperature rise is offset, the temperature self-adaptive adjustment of the damping force is realized, and reliable buffering and anti-shake effects are continuously achieved.

[0024] 3、The hydraulic distributor with balance guide rod anti-shake function, through the setting of the first adjusting part, when the guide rod is impacted, the rotating ring is driven to rotate through the cooperation of the thread groove and the slide tongue, the valve block self-adapt to adjust the oil hole opening degree according to the impact force, the greater the impact force, the smaller the oil hole opening degree, the stronger the damping force, and when the impact force is weakened, the opening degree is restored and the damping force is adapted, the dynamic matching of the damping force and the impact strength is realized, and the self-adaptive buffering performance of the vibration damping assembly is significantly improved; through the setting of the second adjusting part, when the damping oil is heated and the viscosity is reduced due to long-time work of the vibration damping assembly, the shape memory alloy spring plate is deformed with the temperature rise, the mounting ring and the stop block are driven to rotate, the oil hole is shielded to reduce the effective flow area, and then the damping force is increased, the damping force loss caused by the oil temperature rise is offset, the temperature self-adaptive adjustment of the damping force is realized, and reliable buffering and anti-shake effects are continuously achieved.

[0025] 4、The hydraulic distributor with balance guide rod anti-shake function, through the setting of the first adjusting part, when the guide rod is impacted, the rotating ring is driven to rotate through the cooperation of the thread groove and the slide tongue, the valve block self-adapt to adjust the oil hole opening degree according to the impact force, the greater the impact force, the smaller the oil hole opening degree, the stronger the damping force, and when the impact force is weakened, the opening degree is restored and the damping force is adapted, the dynamic matching of the damping force and the impact strength is realized, and the self-adaptive buffering performance of the vibration damping assembly is significantly improved; through the setting of the second adjusting part, when the damping oil is heated and the viscosity is reduced due to long-time work of the vibration damping assembly, the shape memory alloy spring plate is deformed with the temperature rise, the mounting ring and the stop block are driven to rotate, the oil hole is shielded to reduce the effective flow area, and then the damping force is increased, the damping force loss caused by the oil temperature rise is offset, the temperature self-adaptive adjustment of the damping force is realized, and reliable buffering and anti-shake effects are continuously achieved. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0027] Figure 1 It is the overall structure schematic diagram of the present application;

[0028] Figure 2is a casing structure schematic diagram of the present application;

[0029] Figure 3 is a damping assembly structure schematic diagram of the present application;

[0030] Figure 4 is a damping tube structure schematic diagram of the present application;

[0031] Figure 5 is a floating plug structure schematic diagram of the present application;

[0032] Figure 6 is a piston structure schematic diagram of the present application;

[0033] Figure 7 is a first adjusting part structure schematic diagram of the present application;

[0034] Figure 8 is a swivel structure schematic diagram of the present application;

[0035] Figure 9 is an oil hole structure schematic diagram of the present application;

[0036] Figure 10 is a sealing part structure schematic diagram of the present application;

[0037] Figure 11 is a sealing ring structure schematic diagram of the present application;

[0038] Figure 12 is a top block structure schematic diagram of the present application;

[0039] Figure 13 is a second adjusting part structure schematic diagram of the present application;

[0040] Figure 14 is a heat dissipation part structure schematic diagram of the present application;

[0041] Figure 15 is a ball head connecting rod structure schematic diagram of the present application.

[0042] The figure mark is explained as follows:

[0043] 1, casing; 11, first oil way; 12, second oil way; 13, third oil way; 14, fourth oil way; 15, fifth oil way; 16, sixth oil way;

[0044] 2, driver; 3, valve core; 31, shoulder;

[0045] 4, damping assembly; 41, shell; 42, damping tube; 43, first spring; 44, guide rod; 45, piston; 451, oil hole; 46, second spring; 47, floating plug;

[0046] 5, first adjusting part; 51, swivel ring; 52, valve block; 53, slide tongue; 54, threaded groove;

[0047] 6, sealing part; 61, sealing ring; 62, top ring; 63, top block;

[0048] 7, second adjusting part; 71, protruding block; 72, elastic sheet; 73, mounting ring; 74, stop block;

[0049] 8, heat dissipation part; 81, heat conducting ring; 82, heat conducting rod; 83, heat dissipation ring; 84, fin; 85, first ball sleeve; 86, second ball sleeve; 87, ball head connecting rod. DETAILED DESCRIPTION

[0050] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present application.

[0051] Please refer to Figures 1-2One embodiment of the present application is: a hydraulic distributor with balanced guide rod anti-shake function, comprising: a casing 1, a valve core 3 is slidably connected in the casing 1, a driver 2 is fixedly installed at one end of the casing 1, the output end of the driver 2 is connected with the valve core 3, a damping assembly 4 is arranged at the other end of the casing 1, a first oil way 11, a second oil way 12, a third oil way 13, a fourth oil way 14, a fifth oil way 15 and a sixth oil way 16 are installed on the casing 1, the first oil way 11, the second oil way 12, the third oil way 13 and the fourth oil way 14 are arranged side by side in sequence, two shoulders 31 are fixedly installed on the outer wall of the valve core 3, the second oil way 12 is connected with an oil tank oil outlet pipeline, the fourth oil way 14 is connected with an oil tank oil return pipeline, the first oil way 11 is connected with a rod cavity of a hydraulic cylinder, the third oil way 13 is connected with a rodless cavity of the hydraulic cylinder, the fifth oil way 15 and the sixth oil way 16 are communicated, the sixth oil way 16 and the fourth oil way 14 are communicated, and the first oil way 11 is communicated with the fifth oil way 15; the driver 2 is used for driving the valve core 3 to move left and right, when the valve core 3 is located at the rightmost position, the two shoulders 31 block the first oil way 11 and the fourth oil way 14, the second oil way 12 is communicated with the third oil way 13, at this time, the oil tank delivers hydraulic oil to the rodless cavity of the hydraulic cylinder through the oil tank oil outlet pipeline, the second oil way 12 and the third oil way 13 in sequence, after the oil pressure of the rodless cavity of the hydraulic cylinder is raised, the hydraulic rod is driven to extend, and the hydraulic oil in the rod cavity of the hydraulic cylinder is returned to the oil tank through the first oil way 11, the fifth oil way 15, the sixth oil way 16, the fourth oil way 14 and the oil tank oil return pipeline in sequence; when the valve core 3 is located at the middle position, the two shoulders 31 block the first oil way 11 and the third oil way 13 respectively, so that the hydraulic oil in the rod cavity of the hydraulic cylinder is closed, and the hydraulic oil in the rodless cavity of the hydraulic cylinder is closed, at this time, the hydraulic oil in the hydraulic cylinder maintains the current pressure, and the hydraulic rod maintains the current state; when the valve core 3 is located at the leftmost position, the two shoulders 31 block the fifth oil way 15 and the third oil way 13, and the first oil way 11 is communicated with the second oil way 12, at this time, the oil tank delivers hydraulic oil to the rod cavity of the hydraulic cylinder through the oil tank oil outlet pipeline, the second oil way 12 and the first oil way 11 in sequence, after the oil pressure of the rod cavity of the hydraulic cylinder is raised, the hydraulic rod is driven to contract, and the hydraulic oil in the rodless cavity of the hydraulic cylinder is returned to the oil tank through the third oil way 13, the fourth oil way 14 and the oil tank oil return pipeline in sequence; the hydraulic rod can be accurately controlled to extend and contract by moving the valve core 3 left and right, the oil way switching logic is clear, the reliable regulation and control of the action of the hydraulic cylinder is realized, and the accuracy and operation stability of the hydraulic distribution are improved.

[0052] Further, please refer to Figure 2 - Figure 5The damping assembly 4 comprises a shell 41 fixedly connected to the end of the casing 1 away from the driver 2, a damping tube 42 fixedly installed in the shell 41, a guide rod 44 fixedly connected to the end of the valve core 3 away from the driver 2, a first spring 43 connected between the end of the valve core 3 away from the driver 2 and the inner wall of the shell 41, a piston 45 slidingly connected to the inner wall of the damping tube 42, and damping oil filled in the damping tube 42; when the valve core 3 is impacted and shaken, the guide rod 44 is synchronously moved axially, the piston 45 is pushed to slide along the inner wall of the damping tube 42, the damping oil in the damping tube 42 is forced to flow due to the extrusion of the piston 45, and the oil viscosity and flow resistance form a basic damping force to preliminarily buffer the impact, and the first spring 43 can assist the piston 45 to reset and enhance the damping persistence, relieve the shaking of the valve core 3, ensure the stability of the oil passage switching and flow regulation, and reduce the friction and wear between the valve core 3 and the casing 1 as much as possible.

[0053] Further, please refer to Figure 5 The damping tube 42 is slidingly connected with a floating plug 47, and nitrogen is filled between the floating plug 47 and the end of the damping tube 42 away from the valve core 3; when the piston 45 extrudes the damping oil, the damping oil pushes the floating plug 47 to move to the nitrogen side, so that the nitrogen is compressed, the elastic contraction characteristics of the nitrogen can absorb part of the impact energy to form a secondary buffer; when the impact is weakened, the nitrogen expands to push the floating plug 47 to reset, and the damping oil returns in cooperation with the damping force of the damping oil to realize double damping and improve the anti-shaking effect.

[0054] In addition, please refer to Figure 5 Figure 9 The piston 45 is provided with a first adjusting part 5, the first adjusting part 5 comprises a rotating ring 51 rotatably connected to the inside of the piston 45, a plurality of valve blocks 52 fixedly connected to the outer wall of the rotating ring 51, a plurality of oil holes 451 formed in the piston 45, the plurality of valve blocks 52 can adjust the opening degree of the plurality of oil holes 451 according to the impact force received by the guide rod 44, the guide rod 44 is slidingly connected with the piston 45, the second spring 46 is connected between the end of the guide rod 44 away from the valve core 3 and the piston 45, a plurality of slide tongues 53 are fixedly connected to the inner side of the rotating ring 51, a plurality of threaded grooves 54 are formed in the guide rod 44, the plurality of slide tongues 53 are slidingly connected with the plurality of threaded grooves 54, and the rotating ring 51 can be driven to rotate by the cooperation of the plurality of threaded grooves 54 and the plurality of slide tongues 53 when the guide rod 44 moves relative to the rotating ring 51 (for example Figure 7 ​When the guide rod 44 is impacted by a large impact force, the guide rod 44 moves away from the one end of the valve core 3 to the direction away from the piston 45, and the greater the impact force, the greater the distance between the one end of the guide rod 44 away from the valve core 3 and the piston 45. The valve core 3 and the inner wall of the damping pipe 42 are provided with a limiting mechanism, and the valve core 3 can only slide horizontally and cannot rotate. During the movement of the guide rod 44, the guide rod 44 and the piston 45 move relative to each other, and the plurality of sliding tongues 53 inside the rotating ring 51 also move relative to the guide rod 44, so that the plurality of sliding tongues 53 slide along the plurality of threaded grooves 54, respectively. During the sliding of the sliding tongue 53 along the threaded groove 54, the sliding tongue 53 can move circumferentially, so that the plurality of sliding tongues 53 can drive the rotating ring 51 to rotate when they move circumferentially at the same time, and the rotating ring 51 drives the valve block 52 to rotate synchronously, so that the plurality of valve blocks 52 respectively shield the flow area of the plurality of oil holes 451 (as shown in FIG. 10). Figure 9 When the guide rod 44 is impacted by a large impact force, the guide rod 44 moves away from the one end of the valve core 3 to the direction away from the piston 45, and the greater the impact force, the greater the distance between the one end of the guide rod 44 away from the valve core 3 and the piston 45. The valve core 3 and the inner wall of the damping pipe 42 are provided with a limiting mechanism, and the valve core 3 can only slide horizontally and cannot rotate. During the movement of the guide rod 44, the guide rod 44 and the piston 45 move relative to each other, and the plurality of sliding tongues 53 inside the rotating ring 51 also move relative to the guide rod 44, so that the plurality of sliding tongues 53 slide along the plurality of threaded grooves 54, respectively. During the sliding of the sliding tongue 53 along the threaded groove 54, the sliding tongue 53 can move circumferentially, so that the plurality of sliding tongues 53 can drive the rotating ring 51 to rotate when they move circumferentially at the same time, and the rotating ring 51 drives the valve block 52 to rotate synchronously, so that the plurality of valve blocks 52 respectively shield the flow area of the plurality of oil holes 451 (as shown in FIG. 10).

[0055] Please refer to Figure 5 、 Figure 10 , on the basis of the above embodiment, another embodiment of the present application is:

[0056] The piston 45 is provided with a sealing part 6, and the sealing part 6 comprises a sealing ring 61. The outer wall of the piston 45 is provided with a mounting groove, the sealing ring 61 is sleeved in the mounting groove of the piston 45, and the outer side of the sealing ring 61 abuts against the inner wall of the damping pipe 42. The mounting groove provides accurate assembly positioning for the sealing ring 61, so that the sealing ring 61 is stably sleeved on the outer wall of the piston 45, and the outer side thereof abuts against the inner wall of the damping pipe 42 tightly. The sealing ring 61 can preliminarily block the leakage of damping oil in the damping pipe 42 from the gap between the piston 45 and the damping pipe 42, forms a basic sealing barrier, and guarantees the pressure stability of the damping oil.

[0057] It is worth noting that, please refer to Figure 5 、 Figure 10 - Figure 12 , the sealing part 6 further comprises two top rings 62, both of which are sleeved in the mounting groove of the piston 45. The two top rings 62 are mirror images. The inner side of the sealing ring 61 is provided with a V-shaped groove, and the top ring 62 is provided with an outer inclined surface and an inner inclined surface. The outer inclined surfaces of the two top rings 62 are embedded in the V-shaped groove of the sealing ring 61 (as shown in FIG. 11). Figure 12As shown), the inner wall of the piston 45 is slidingly connected with a plurality of top blocks 63, the top blocks 63 are provided with arc surfaces and sharp surfaces, the sharp surfaces of the plurality of top blocks 63 are embedded between the inner inclined surfaces of the two top rings 62, and the arc surfaces of the plurality of top blocks 63 are located on the movement tracks of the plurality of valve blocks 52 (as shown Figure 12 As shown), when the valve block 52 moves, the top block 63 can be driven to move away from the rotary ring 51 by the arc surface, the top block 63 moves away from the rotary ring 51 by using the sharp surface to drive the two top rings 62 to move away from each other and move away from the rotary ring 51 at the same time, so as to increase the pressure of the outer side of the sealing ring 61 on the inner wall of the damping pipe 42 and the pressure of the sealing ring 61 on the installation groove of the piston 45; when the valve block 52 rotates with the rotary ring 51, the edge thereof touches the arc surface of the top block 63, the arc surface converts the circumferential force into radial thrust, pushes the top block 63 to move outward, the sharp surface of the top block 63 extrudes the inner inclined surfaces of the two top rings 62, forces the two top rings 62 to move away from each other and synchronously move outward away from the rotary ring 51, at this time, the outer inclined surfaces of the two top rings 62 slide along the inner wall of the V-shaped groove of the sealing ring 61, push the V-shaped groove to expand outward along the opening direction, in this process, the V-shaped groove is extruded by the outer inclined surfaces of the two top rings 62 and drives the sealing ring 61 to expand outward as a whole, significantly increases the extrusion degree of the sealing ring 61 on the inner wall of the damping pipe 42, and at the same time, the expansion of the V-shaped groove also makes the two sides of the sealing ring 61 more closely fit with the installation groove, so as to realize the technical effect that the stronger the impact on the guide rod 44, the greater the extrusion force of the sealing ring 61 on the inner wall of the damping pipe 42, so that effective sealing can be ensured when the oil pressure in the damping pipe 42 is high, and part of kinetic energy is balanced by increasing the friction force between the sealing ring 61 and the inner wall of the damping pipe 42, and as the impact force of the guide rod 44 decreases, the extrusion force of the sealing ring 61 on the inner wall of the damping pipe 42 also decreases, unnecessary friction is avoided, and the service life of the sealing ring 61 is prolonged.

[0058] Please refer to Figure 6 、 Figure 13 On the basis of the above-mentioned embodiments, another embodiment of the present application is:

[0059] The second adjusting part 7 is further arranged on the piston 45, and the second adjusting part 7 comprises a mounting ring 73 which is rotationally connected to the piston 45, a plurality of stoppers 74 are fixedly connected to the mounting ring 73, the plurality of stoppers 74 are respectively located beside the plurality of oil holes 451, a plurality of protrusions 71 are fixedly installed on the piston 45, elastic sheets 72 are fixedly connected to the protrusions 71, one end of the elastic sheet 72, which is far away from the protrusion 71, is fixedly connected to the mounting ring 73, the elastic sheet 72 is made of shape memory alloy and has elasticity, and the plurality of elastic sheets 72 are deformed after the temperature of the damping oil in the damping pipe 42 is increased, so that the mounting ring 73 is rotated by the plurality of elastic sheets 72, and the plurality of stoppers 74 are used for adjusting the opening degrees of the plurality of oil holes 451 when the mounting ring 73 is rotated; after the vibration damping assembly 4 works for a long time, the temperature of the damping oil in the damping pipe 42 is gradually increased due to continuous shearing and friction, the viscosity of the oil is reduced, the damping force is reduced with the increase of the temperature, at this time, the plurality of elastic sheets 72 made of shape memory alloy are deformed due to the increase of the temperature of the damping oil, the elastic sheet 72 has a preset bending trend under the action of the temperature, one end of the elastic sheet 72 is fixed to the protrusion 71, and the other end of the elastic sheet 72 pulls the mounting ring 73 to rotate, so that the plurality of stoppers 74 are synchronously rotated when the mounting ring 73 is rotated, the stoppers 74 partially shield the corresponding oil holes 451, and the effective flow area of the oil holes 451 is reduced; through the temperature sensing type adjustment, the opening degrees of the oil holes 451 are reduced with the increase of the temperature, and the damping force is increased, so that the damping force, which is reduced due to the increase of the temperature, is offset, the overall damping force of the damping pipe 42 is kept stable, and the reliable buffering effect of the vibration damping assembly 4 can be continuously exerted in a long time working.

[0060] Please refer to Figure 4 、 Figure 14 On the basis of the above-mentioned embodiments, another embodiment of the present application is:

[0061] The damping pipe 42 is provided with a heat dissipation part 8, the heat dissipation part 8 comprises a heat conduction ring 81 and a heat dissipation ring 83, the heat conduction ring 81 is rotationally connected to the inner wall of the damping pipe 42, the heat dissipation ring 83 is fixedly connected to the outer wall of the damping pipe 42, a plurality of heat conduction rods 82 are fixedly connected to the inner side of the heat conduction ring 81, the heat dissipation ring 83 is located on the outer side of the heat conduction ring 81, the plurality of heat conduction rods 82 are used for absorbing the heat of the damping oil in the damping pipe 42 and transferring the heat to the heat dissipation ring 83 through the heat conduction ring 81 and the outer wall of the damping pipe 42, and a plurality of fins 84 are connected to the outer wall of the heat dissipation ring 83; when the damping oil in the damping pipe 42 generates heat due to work, the plurality of heat conduction rods 82 are directly in contact with the damping oil, absorb the heat in the damping oil and conduct the heat to the heat conduction ring 81, the heat conduction ring 81 further transfers the heat to the heat dissipation ring 83 through the pipe wall of the damping pipe 42, and the plurality of fins 84 on the outer wall of the heat dissipation ring 83 greatly increase the contact area with the air outside, so that the heat is rapidly dissipated to the surrounding environment, thereby effectively reducing the temperature of the damping oil and avoiding the reduction of the damping performance due to the excessively high oil temperature.

[0062] It is worth mentioning that, please refer toFigure 4 、 Figure 14 、 Figure 15 The heat dissipation part 8 further comprises a plurality of ball head connecting rods 87, a plurality of first ball sleeves 85 are fixedly installed on the heat conduction ring 81, a plurality of second ball sleeves 86 are fixedly connected on the floating plug 47, the plurality of ball head connecting rods 87 are located between the heat conduction ring 81 and the floating plug 47, one end of the plurality of ball head connecting rods 87 is movably sleeved with the plurality of first ball sleeves 85 respectively, the other end of the plurality of ball head connecting rods 87 is movably sleeved with the plurality of second ball sleeves 86 respectively, and the floating plug 47 can drive the heat conduction ring 81 to rotate through the plurality of ball head connecting rods 87 when the floating plug 47 moves; the plurality of ball head connecting rods 87 are arranged in an inclined state and are arrayed in a circumferential direction, and the two ends thereof are movably connected with the first ball sleeves 85 and the second ball sleeves 86 through ball heads respectively, so as to form a flexible transmission structure, when the floating plug 47 moves axially under the action of the damping oil pressure, the heat conduction ring 81 is driven to rotate around the inner wall of the damping pipe 42 through the inclined ball head connecting rods 87, and the plurality of heat conduction rods 82 are rotated and stirred in the damping oil synchronously when the heat conduction ring 81 rotates, so as to not only increase the contact area of the heat conduction rods 82 and the damping oil in different regions, improve the heat absorption efficiency, but also promote the mixed flow of the oil in the damping pipe 42, so that the oil temperature distribution is more uniform, and the damping effect is avoided from being affected by local overheating.

[0063] On the basis of the above-mentioned embodiments, another embodiment of the present application is:

[0064] A hydraulic distributor with a balance guide rod anti-shaking function, comprising the following steps:

[0065] Step one: driving the hydraulic cylinder to extend, the driver 2 drives the valve core 3 to move to the rightmost position, at this time, the two shoulders 31 block the first oil way 11 and the fourth oil way 14, and the second oil way 12 is communicated with the third oil way 13, at this time, the oil tank delivers the hydraulic oil to the hydraulic cylinder rodless cavity through the oil tank oil outlet pipeline, the second oil way 12 and the third oil way 13 in turn, and the hydraulic oil in the hydraulic cylinder rod cavity is returned to the oil tank through the first oil way 11, the fifth oil way 15, the sixth oil way 16, the fourth oil way 14 and the oil tank oil return pipeline in turn after the hydraulic cylinder rodless cavity oil pressure rises, so as to drive the hydraulic rod to extend;

[0066] Step two: driving the hydraulic cylinder to keep pressure, the driver 2 drives the valve core 3 to move to the center position, at this time, the two shoulders 31 block the first oil way 11 and the third oil way 13 respectively, so that the hydraulic oil in the first oil way 11 to the hydraulic cylinder rod cavity is closed, and the hydraulic oil in the third oil way 13 to the hydraulic cylinder rodless cavity is closed, at this time, the hydraulic oil in the hydraulic cylinder keeps the current pressure, and the hydraulic rod maintains the current state;

[0067] Step three: drive the hydraulic cylinder to shrink, use the driver 2 to drive the valve core 3 to move to the leftmost, at this time two shoulders 31 block the fifth oil way 15 and the third oil way 13, the first oil way 11 is communicated with the second oil way 12, at this time the oil tank will hydraulic oil is transported to the hydraulic cylinder rod cavity in turn through the oil tank oil outlet pipeline, the second oil way 12, the first oil way 11, the hydraulic cylinder rod cavity oil pressure rises and drives the hydraulic rod to shrink, the hydraulic oil in the hydraulic cylinder rod cavity is returned to the oil tank in turn through the third oil way 13, the fourth oil way 14, the oil tank oil return pipeline;

[0068] Step four: the damping assembly 4 inhibits the whole process of shaking, if the hydraulic system is switched by the oil way, load fluctuation or pressure impact is generated by external force, makes the valve core 3 to shake, the valve core 3 drives the guide rod 44 to impact axially, the guide rod 44 is transmitted to the piston 45 in the damping pipe 42, pushes the piston 45 to slide along the inner wall of the damping pipe 42, the damping oil in the damping pipe 42 is forced to flow through the oil hole 451, at this time the rotating ring 51 is automatically rotated according to the impact force received by the guide rod 44, the greater the impact force, the greater the area of the valve block 52 to the oil hole 451 is blocked by the rotating ring 51, the effective flow area of the oil hole 451 is smaller, the damping oil flow resistance is enhanced, the damping force generated is increased simultaneously, the impact force is weakened, the rotating ring 51 is reversely rotated, the valve block 52 reduces the shielding, the opening of the oil hole 451 recovers, the damping force adapts to the smooth motion requirement of the valve core 3, and the smoothness of the hydraulic rod extension and retraction action is ensured throughout the process.

[0069] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A hydraulic distributor with a balanced guide rod anti-shake function, characterized in that, The utility model relates to a kind of hydraulic shock absorber, including: Casing (1), valve core (3) are slidably connected in the casing (1), one end of the casing (1) is fixedly installed with driver (2), the output end of the driver (2) is connected with valve core (3), the other end of the casing (1) is provided with damping assembly (4); The damping assembly (4) includes housing (41), the housing (41) is fixedly connected in the casing (1) away from the one end of driver (2), the housing (41) is fixedly installed with damping tube (42) in, the one end of valve core (3) away from driver (2) is fixedly connected with guide rod (44), the first spring (43) is connected between the one end of valve core (3) away from driver (2) and the inner wall of housing (41), the damping tube (42) inner wall is slidably connected with piston (45), the damping tube (42) is filled with damping oil in; First adjusting part (5) is provided on the piston (45), and the first adjusting part (5) includes swivel ring (51), the swivel ring (51) is rotatably connected inside piston (45), a plurality of valve blocks (52) are fixedly connected on the outer wall of swivel ring (51), a plurality of oil holes (451) are formed in the piston (45), and the opening degree of the plurality of oil holes (451) can be adjusted according to the impact force that the guide rod (44) receives by the plurality of valve blocks (52). First oil way (11), second oil way (12), third oil way (13), fourth oil way (14), fifth oil way (15) and sixth oil way (16) are installed on the casing (1), the first oil way (11), second oil way (12), third oil way (13) and fourth oil way (14) are sequentially arranged side by side, two shoulders (31) are fixedly installed on the outer wall of valve core (3), the second oil way (12) is connected with oil tank oil outlet pipeline, the fourth oil way (14) is connected with oil tank oil return pipeline, the first oil way (11) is connected with the rod cavity of hydraulic cylinder, the third oil way (13) is connected with the rodless cavity of hydraulic cylinder, the fifth oil way (15) and the sixth oil way (16) are communicated, the sixth oil way (16) and the fourth oil way (14) are communicated, and the first oil way (11) is communicated with the fifth oil way (15). The guide rod (44) and piston (45) are through sliding connection, the second spring (46) is connected between the one end of guide rod (44) away from valve core (3) and piston (45), a plurality of slide tongues (53) are fixedly connected on the inner side of swivel ring (51), a plurality of threaded grooves (54) are formed in the guide rod (44), a plurality of slide tongues (53) are slidably connected with a plurality of threaded grooves (54) respectively, when the guide rod (44) and swivel ring (51) relatively move, the swivel ring (51) can be driven to rotate by the cooperation of a plurality of threaded grooves (54) and a plurality of slide tongues (53), when the swivel ring (51) rotates, a plurality of valve blocks (52) are driven to rotate, so that a plurality of valve blocks (52) adjust the opening degree of a plurality of oil holes (451) respectively.

2. The hydraulic distributor with balanced guide rod anti-hunting function according to claim 1, characterized in that: A floating plug (47) is slidably connected to the inner wall of the damping pipe (42), and nitrogen is filled between the floating plug (47) and the end of the damping pipe (42) away from the valve core (3).

3. The hydraulic distributor with balanced guide rod anti-hunting function according to claim 1, characterized in that: A sealing part (6) is arranged on the piston (45), the sealing part (6) comprises a sealing ring (61), and the outer wall of the piston (45) is provided with a mounting groove, the sealing ring (61) is sleeved in the mounting groove of the piston (45), and the outer side of the sealing ring (61) abuts against the inner wall of the damping pipe (42).

4. The hydraulic distributor with balanced guide rod anti-hunting function according to claim 3, characterized in that: The sealing part (6) further comprises two top rings (62), both of which are sleeved in the mounting groove of the piston (45), and both of which are mirror image arranged, the inner side of the sealing ring (61) is provided with a V-shaped groove, the top ring (62) is provided with an outer inclined surface and an inner inclined surface, the outer inclined surfaces of both of the top rings (62) are embedded in the V-shaped groove of the sealing ring (61) together, the inner wall of the piston (45) is slidably connected with a plurality of top blocks (63), the top block (63) is provided with an arc surface and a sharp surface, the sharp surfaces of the plurality of top blocks (63) are embedded between the inner inclined surfaces of the two top rings (62), and the arc surfaces of the plurality of top blocks (63) are located on the movement trajectories of the plurality of valve blocks (52), respectively, when the valve block (52) moves, the top block (63) can be driven to move away from the rotating ring (51) through the arc surface, and the top block (63) moves away from the rotating ring (51) to drive the two top rings (62) to move away from each other and the rotating ring (51) at the same time, so as to increase the pressure of the outer side of the sealing ring (61) on the inner wall of the damping pipe (42) and the pressure of the two sides of the sealing ring (61) on the mounting groove of the piston (45).

5. The hydraulic distributor with balanced guide rod anti-hunting function according to claim 1, characterized in that: A second adjusting part (7) is further arranged on the piston (45), the second adjusting part (7) comprises a mounting ring (73), the mounting ring (73) is rotatably connected to the piston (45), a plurality of stop blocks (74) are fixedly connected to the mounting ring (73), the plurality of stop blocks (74) are located beside the plurality of oil holes (451), respectively, a plurality of convex blocks (71) are fixedly installed on the piston (45), the convex block (71) is fixedly connected with an elastic sheet (72), one end of the elastic sheet (72) away from the convex block (71) is fixedly connected with the mounting ring (73), the elastic sheet (72) is made of shape memory alloy material and has elasticity, and when the damping oil in the damping pipe (42) is heated, the plurality of elastic sheets (72) are deformed, so that the mounting ring (73) is driven to rotate by the plurality of elastic sheets (72), and when the mounting ring (73) rotates, the plurality of stop blocks (74) are driven to adjust the opening degrees of the plurality of oil holes (451), respectively.

6. The hydraulic distributor with balanced guide rod anti-hunting function according to claim 2, characterized in that: The damping pipe (42) is provided with a heat dissipation part (8), the heat dissipation part (8) includes a heat conduction ring (81) and a heat dissipation ring (83), the heat conduction ring (81) is rotationally connected to the inner wall of the damping pipe (42), the heat dissipation ring (83) is fixedly connected to the outer wall of the damping pipe (42), the inner side of the heat conduction ring (81) is fixedly connected with a plurality of heat conduction rods (82), the heat dissipation ring (83) is located on the outer side of the heat conduction ring (81), the plurality of heat conduction rods (82) are used for absorbing the heat of the damping oil in the damping pipe (42) and transmitting the heat to the heat dissipation ring (83) through the outer wall of the damping pipe (42) via the heat conduction ring (81), and the outer wall of the heat dissipation ring (83) is connected with a plurality of fins (84).

7. The hydraulic distributor with balanced guide rod anti-hunting function according to claim 6, characterized in that: The heat dissipation part (8) further includes a plurality of ball head connecting rods (87), a plurality of first ball sleeves (85) are fixedly installed on the heat conduction ring (81), and a plurality of second ball sleeves (86) are fixedly connected to the floating plug (47), a plurality of the ball head connecting rods (87) are located between the heat conduction ring (81) and the floating plug (47), one end of each of the plurality of ball head connecting rods (87) is movably sleeved with a first ball sleeve (85), and the other end of each of the plurality of ball head connecting rods (87) is movably sleeved with a second ball sleeve (86), and the floating plug (47) can drive the heat conduction ring (81) to rotate through the plurality of ball head connecting rods (87) when the floating plug (47) moves.

8. A hydraulic distribution method with balanced guide bar anti-shake function, characterized in that: The hydraulic distributor with the balance guide rod anti-shaking function according to any one of claims 1-7 further comprises the following steps: Step one: driving the hydraulic cylinder to extend, the driver (2) drives the valve core (3) to move to the rightmost position, at this time, the oil tank delivers hydraulic oil to the rodless cavity of the hydraulic cylinder through the oil tank outlet pipeline, the second oil path (12) and the third oil path (13) in turn, and the hydraulic oil in the rodless cavity of the hydraulic cylinder drives the hydraulic rod to extend after the oil pressure is increased; Step two: driving the hydraulic cylinder to keep pressure, the driver (2) drives the valve core (3) to move to the centermost position, the hydraulic oil in the first oil path (11) to the rod cavity of the hydraulic cylinder is closed, and the hydraulic oil in the hydraulic cylinder keeps the current pressure at this time; Step three: driving the hydraulic cylinder to contract, the driver (2) drives the valve core (3) to move to the leftmost position, the oil tank delivers hydraulic oil to the rod cavity of the hydraulic cylinder through the oil tank outlet pipeline, the second oil path (12) and the first oil path (11) in turn, and the hydraulic oil in the rod cavity of the hydraulic cylinder drives the hydraulic rod to contract after the oil pressure is increased; Step four: the damping force matching valve core (3) meets the smooth movement requirement of the damping assembly (4), and the smoothness of the extension and contraction of the hydraulic rod is ensured throughout the process.

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