Shock-resistant hydraulic valve block

Abstract

The impact-resistant hydraulic valve block comprises a valve block body provided with a first oil port B, a first oil port A, a second oil port B and a second oil port A. A through valve groove is formed in the valve block body, a valve element sleeve is packaged in the valve groove through two sets of packaging mechanisms, and the valve groove is provided with four sets of communication points. The valve element sleeve is rotationally connected into the valve groove, a crescent groove is formed in the outer wall of the valve element sleeve, a valve element rod is arranged in the valve element sleeve, a first spiral opening groove and a second spiral opening groove are formed in the outer wall of the valve element rod, a through hole is formed in the crescent groove, and an oil port P and an oil port T are formed in the packaging mechanism; the direction of the oil way is adjusted through the rotary valve element sleeve, compared with a traditional electromagnetic control mode of axis displacement, the adjusting stroke is small, the axial displacement influence of extra hydraulic impact generated by electromagnetic control on the valve element is avoided, multi-oil-way control is achieved through the rotary valve element sleeve, the structure is simpler, and the maintenance cost is low.

Description

Technical Field

[0001] The present application relates to the field of hydraulic valve blocks, and in particular to an impact-resistant hydraulic valve block. Background Art

[0002] In hydraulic systems, hydraulic valve blocks are key components that control the direction, pressure, and flow of hydraulic oil. Their performance directly impacts the stability and reliability of the entire hydraulic system. With the continuous advancement of industrial technology, the requirements for hydraulic systems are becoming increasingly stringent. Traditional hydraulic valve blocks face numerous challenges, especially in high-impact and high-load environments such as construction machinery and mining equipment.

[0003] Traditional valve blocks often utilize a control method that combines a valve block with multiple sets of solenoid valves. This control method results in a large adjustment stroke and a complex structure, which not only increases equipment cost and size but also makes disassembly and maintenance difficult. Furthermore, traditional axial displacement solenoid control methods are prone to generating additional hydraulic shock, causing axial displacement impacts on the control valve core, resulting in reduced hydraulic control accuracy and affecting system operation. Summary of the Invention

[0004] The purpose of the present application is to solve the technical problems that the traditional electromagnetic controlled valve block has a complex structure, poor maintenance convenience, and is susceptible to axial displacement caused by oil pressure shock, resulting in a decrease in control accuracy. Compared with the existing technology, an impact-resistant hydraulic valve block is provided, including a valve block provided with B oil port 1, A oil port 1, B oil port 2 and A oil port 2, a valve slot is provided through the valve block, a valve core sleeve is encapsulated in the valve slot by two groups of encapsulation mechanisms, the B oil port 1, A oil port 1, B oil port 2 and A oil port 2 are respectively provided with a connection point with the valve slot, and the four groups of the connection points are arranged equidistantly in the vertical direction and evenly distributed at equal angles in the circumferential direction;

[0005] The valve core sleeve is rotatably connected to the valve groove, and the outer wall of the valve core sleeve is provided with a crescent groove corresponding to the communication points one by one. A valve core rod is fixed in the valve core sleeve through an interference groove, and the outer wall of the valve core rod is provided with a spiral opening groove 1 and a spiral opening groove 2 which are rotationally symmetrical. A through hole is provided in the crescent groove, and two of the through holes spaced apart are connected to the spiral opening groove 1, and the other two through holes spaced apart are connected to the spiral opening groove 2. The two groups of packaging mechanisms are respectively provided with a P oil port connected to the spiral opening groove 1 and a T oil port connected to the spiral opening groove 2;

[0006] The valve block is also provided with an executive motor for driving the valve core sleeve to rotate at a fixed angle, and the two sets of packaging mechanisms are provided with anti-impact mechanisms on opposite sides.

[0007] Furthermore, a sealing groove is provided in the middle of the valve core sleeve, and a sealing ring matching the sealing groove is provided in the valve groove;

[0008] The four crescent grooves are arranged equidistantly in the vertical direction and at equal angles in the circumferential direction. The valve core sleeve is provided with a sealing block on the side away from the crescent groove. The four crescent grooves are grouped in pairs, and an oblique separation ring is also provided between the two crescent grooves in the same group.

[0009] Furthermore, two sets of sealing rubber sleeves are fixedly sleeved on the outer wall of the valve core sleeve, and the sealing rubber sleeve is provided with an opening corresponding to the crescent groove. The inner diameter of the sealing rubber sleeve is equal to the outer diameter of the sealing block and the crescent groove, and the outer diameter of the sealing rubber sleeve is larger than the inner diameter of the valve groove.

[0010] Furthermore, the projections of the two blocking blocks in the same group on the horizontal plane have overlapping parts;

[0011] The arc length angle of the crescent groove on the circumference is not less than 90°, and the maximum groove width of the crescent groove in the vertical direction is not less than the vertical arrangement spacing of the four groups of connecting points.

[0012] Furthermore, the packaging mechanism includes a port cover, both ends of the valve slot are provided with assembly grooves that match the port cover, the opposite ends of the two groups of port covers are rotatably connected to the second sealing bearing, the valve core sleeve is rotatably connected between the two groups of second sealing bearings, the anti-impact mechanism includes a buffer member arranged in the port cover, one end of the buffer member is rotatably connected to the piston, the port cover is provided with a sliding cavity that matches the piston, the opening of the sliding cavity is detachably connected to the oil chamber cover, the oil chamber cover is rotatably connected to a drive shaft through the sealing bearing, the end of the drive shaft away from the oil chamber cover is fixed with a spline shaft, the end of the valve core sleeve is provided with a spline groove corresponding to the spline shaft, and a buffer spring is further clamped between the drive shaft and the valve core sleeve;

[0013] The buffer component is provided with a buffer cone head at the end away from the piston, and a sliding cavity 2 corresponding to the buffer cone head is provided in the port cover. A main oil channel is provided in the buffer component, and the drive shaft is rotatably connected in the buffer component. The main oil channel is connected to a plurality of diversion oil channels evenly distributed at equal angles at one end close to the valve core sleeve.

[0014] Furthermore, the diverter oil channel is a spiral channel, and the output direction of the diverter oil channel is arranged tangent to the circumferential direction of the buffer cone head.

[0015] Furthermore, the buffer spring has an elastic force that drives the buffer part and the drive shaft away from the valve core sleeve, and the valve core rod is provided with an oil-passing notch at the end away from the spiral opening groove 1 and the spiral opening groove 2, and the spiral opening groove 1 and the spiral opening groove 2 are respectively connected to the corresponding sliding cavity 2 through the oil-passing notch.

[0016] Furthermore, the P oil port and the T oil port are respectively arranged on the corresponding oil chamber cover, and the end of the drive shaft at one end extends through the oil chamber cover and is transmission-connected to the output end of the actuator motor.

[0017] Furthermore, the drive shaft is provided with a filter cover in the sliding cavity 2, and the filter cover includes a mounting ring for fixing to the end of the buffer cone head. A conical shell is fixed in the filter cover, and the conical shell divides the filter cover into a discharge bin, an oil inlet bin and a collection bin. The discharge bin is a conical cavity, and the collection bin is a semicircular cavity. The output end of the diversion oil channel is arranged in the oil inlet bin.

[0018] Furthermore, the conical shell is an S-shaped conical elastic cover structure with a cross-section. The conical shell is provided with an elastic node on the side close to the collection bin. The elastic node has an elastic force that drives the conical shell close to the buffer cone head. The conical shell is provided with a filter screen 1 between the discharge bin and the oil inlet bin, and a filter screen 2 is provided at the discharge end of the discharge bin.

[0019] Compared with the existing technology, the advantages of this application are:

[0020] The present invention adopts a buffer spring, a buffer component and a buffer component with a diverter oil channel. When a hydraulic shock occurs, the buffer spring is compressed to absorb energy, and at the same time the hydraulic oil is formed into a rotational flow, converting the impact force into the rotational kinetic energy of the buffer cone head, which can effectively absorb and buffer the impact energy generated by the hydraulic system.

[0021] At the same time, the present invention adopts a rotating valve core sleeve to adjust the direction of the oil circuit. Compared with the traditional electromagnetic control method of axial displacement, the adjustment stroke is small, which avoids the influence of the axial displacement of the valve core caused by the additional hydraulic shock generated by electromagnetic control. Multi-oil circuit control is achieved by rotating the valve core sleeve, the structure is simpler, and the maintenance cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of this application;

[0023] Figure 2 This is a schematic diagram of the bottom structure of this application;

[0024] Figure 3 This is a schematic diagram of the explosion structure of this application;

[0025] Figure 4 This is a schematic diagram of the exploded structure of the packaging mechanism and valve core sleeve proposed in this application;

[0026] Figure 5 A perspective view of the internal structure of the valve block proposed in this application;

[0027] Figure 6 This is a schematic diagram of the exploded structure of the valve core sleeve and its components proposed in this application;

[0028] Figure 7 Schematic diagram of the front and back structures of the valve core sleeve proposed in this application;

[0029] Figure 8 A perspective view of the structure of the valve core rod proposed in this application;

[0030] Figure 9 This is a schematic diagram of the distribution of the through holes and the oil port connection points proposed in this application;

[0031] Figure 10 This is a schematic diagram of the internal structure of the valve block proposed in this application;

[0032] Figure 11 This is a schematic diagram of the cross-sectional structure of the valve block proposed in this application;

[0033] Figure 12 This is a schematic diagram of the exploded structure of the packaging mechanism proposed in this application;

[0034] Figure 13 A perspective view of the internal structure of the buffer member proposed in this application;

[0035] Figure 14 This is a schematic diagram of the internal cross-sectional structure of the valve core sleeve proposed in this application;

[0036] Figure 15 This is a schematic diagram of the cross-sectional structure of this application;

[0037] Figure 16 for Figure 15 A schematic diagram of the enlarged structure of the middle part A;

[0038] Figure 17 A schematic cross-sectional view of the buffer and filter cover proposed in this application;

[0039] Figure 18 for Figure 17 Schematic diagram of the enlarged structure of part B in the middle.

[0040] Description of the numbers in the figure:

[0041] 1. Valve block; 11. B oil port 1; 12. A oil port 1; 13. B oil port 2; 14. A oil port 2; 15. Valve spool; 16. Sealing ring; 17. Assembly groove; 2. Actuator; 3. Packaging mechanism; 301. P oil port; 302. T oil port; 31. Port cover; 311. Sliding cavity 1; 312. Sliding cavity 2; 32. Oil chamber cover; 321. Sealed bearing 1; 33. Sealed bearing 2; 34. Buffer; 341. Piston; 342. Buffer cone; 343. Main oil channel; 344. Diverter oil channel; 35. Filter cover; 351. Mounting ring ;352. Collection bin;353. Oil inlet bin;354. Discharge bin;3541. Filter screen 2;355. Conical shell;3551. Filter screen 1;3552. Elastic node;36. Drive shaft;361. Spline shaft;37. Buffer spring;4. Valve core sleeve;401. Sealing rubber sleeve;41. Sealing groove;42. Crescent groove;421. Through hole;43. Blocking block;44. Oblique separating ring;45. Interference groove;5. Valve core rod;501. Oil notch;51. Spiral opening groove 1;52. Spiral opening groove 2;53. Spline groove. DETAILED DESCRIPTION

[0042] The embodiments will be combined with the drawings in the specification to clearly and completely describe the technical solution of this application. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of this application.

[0043] Example:

[0044] The present invention provides a shock-resistant hydraulic valve block, see Figures 1-18 It mainly includes a valve block 1, a valve core sleeve 4, a valve core rod 5, a packaging mechanism 3 and an actuator motor 2, wherein the valve block 1 is provided with a B oil port 11, an A oil port 1 12, a B oil port 2 13 and an A oil port 2 14. These oil ports are used to connect with other components of the hydraulic system to realize the input and output of hydraulic oil. Specifically, the B oil port 11, the A oil port 1 12, the B oil port 2 13 and the A oil port 2 14 correspond to the inlet and outlet ports of the two groups of hydraulic motors respectively.

[0045] See also Figures 1-9 The valve block 1 is provided with a through valve groove 15, and the valve core sleeve 4 is encapsulated in the valve groove 15 by two sets of encapsulation mechanisms 3, which improves the convenience of disassembly and maintenance. The B oil port 11, the A oil port 12, the B oil port 2 13 and the A oil port 2 14 are respectively provided with connection points with the valve groove 15, and the four groups of connection points are arranged equidistantly in the vertical direction and evenly at equal angles in the circumferential direction. For details, please refer to Figure 9 In this embodiment, the four groups of connection points are, from bottom to top, the connection point of A oil port 1 12, the connection point of B oil port 2 13, the connection point of A oil port 2 14 and the connection point of B oil port 1 11.

[0046] Please refer to the Figure 6-Figure 8 The valve core sleeve 4 is rotatably connected to the valve groove 15, and its outer wall is provided with a crescent groove 42 corresponding to the connection point one by one. The valve core rod 5 is firmly fixed in the valve core sleeve 4 through the interference groove 45. The outer wall of the valve core rod 5 is rotationally symmetrically provided with a spiral opening groove 1 51 and a spiral opening groove 2 52. A through hole 421 is provided in the crescent groove 42, wherein two spaced apart through holes 421 are connected to the spiral opening groove 1 51, and the other two spaced apart through holes 421 are connected to the spiral opening groove 2 52.

[0047] See also Figure 1 and Figure 2 as well as Figure 8 The two sets of packaging mechanisms 3 are respectively provided with a P oil port 301 connected to the spiral opening groove 1 51 and a T oil port 302 connected to the spiral opening groove 2 52. Through this structure, the pressure oil enters from the P oil port 301, flows through the spiral opening groove 1 51 and the through hole 421 to the corresponding working oil port; the return oil flows back to the T oil port 302 from the working oil port through the through hole 421 and the spiral opening groove 2 52.

[0048] See also Figure 6 and Figure 11 , a sealing groove 41 is provided in the middle of the valve core sleeve 4, and a sealing ring 16 matching the sealing groove 41 is provided in the valve groove 15, which effectively prevents the leakage of hydraulic oil between the valve core sleeve 4 and the valve groove 15, thereby improving the sealing performance of the valve block 1. The four crescent grooves 42 are arranged equidistantly in the vertical direction and evenly distributed at equal angles in the circumferential direction. The valve core sleeve 4 is provided with a blocking block 43 on the side away from the crescent groove 42. The four crescent grooves 42 are grouped in pairs, and an oblique separating ring 44 is further provided between the two crescent grooves 42 in the same group. The oblique separating ring 44 further optimizes the flow path of the hydraulic oil, reduces the turbulence and pressure fluctuation of the hydraulic oil, and at the same time, the oblique separating ring 44 effectively separates the four crescent grooves 42. Combined with the design of the spiral opening groove 1 51 and the spiral opening groove 2 52, please refer to Figure 9 Taking this embodiment as an example, the four crescent grooves 42 are arranged from bottom to top in the following order: connecting spiral opening groove 2 52, connecting spiral opening groove 1 51, connecting spiral opening groove 2 52, and connecting spiral opening groove 1 51.

[0049] See also Figure 6 Two sets of sealing rubber sleeves 401 are fixedly sleeved on the outer wall of the valve core sleeve 4. The sealing rubber sleeve 401 is provided with an opening corresponding to the crescent groove 42. Its inner diameter is equal to the outer diameter of the sealing block 43 and the crescent groove 42, and the outer diameter is larger than the inner diameter of the valve groove 15. The sealing rubber sleeve 401 further enhances the sealing effect and ensures that the hydraulic oil can only flow through the predetermined channel.

[0050] The projections of the two blocking blocks 43 of the same group on the horizontal plane have overlapping parts, which makes it possible to switch the flow direction of the hydraulic oil more smoothly during the rotation of the valve core sleeve 4, reducing impact and vibration. The arc length angle of the crescent groove 42 on the circumference is not less than 90°, and the maximum groove width in the vertical direction is not less than the vertical arrangement spacing of the four groups of connecting points, so that the maximum width of the crescent groove 42 can simultaneously match two adjacent groups of connecting points, ensuring that the hydraulic oil has sufficient channel area during the flow process and reducing the flow resistance.

[0051] In a specific application scenario, when two groups of hydraulic motors need to rotate in the same direction, the valve core sleeve 4 is rotated and switched, so that one group of spaced crescent grooves 42 is connected to the corresponding A oil port 1 12 and A oil port 2 14 through their respective through holes 421, and the other group of spaced crescent grooves 42 is connected to the corresponding B oil port 1 11 and B oil port 2 13 through their respective through holes 421. At this time, the pressure oil of the P oil port 301 is guided into the spiral opening groove 1 51 and discharged through the B oil port 1 11 and B oil port 2 13. At the same time, the hydraulic oil returning from the A oil port 1 12 and A oil port 2 14 is returned to the T oil port 302 through the spiral opening groove 2 52, thereby driving the two groups of hydraulic motors to move in the same direction.

[0052] When the two hydraulic motors need to rotate in opposite directions, the valve core sleeve 4 is rotated and switched so that the opening of the crescent groove 42 connected to the spiral opening groove 51 is aligned with the connection point of the A oil port 2 14 and the connection point of the B oil port 11. At the same time, the opening of the crescent groove 42 connected to the spiral opening groove 2 52 is aligned with the connection point of the A oil port 12 and the connection point of the B oil port 2 13. At this time, the spiral opening groove 1 51 provides pressure oil to the A oil port 2 14 and the B oil port 11, and the spiral opening groove 2 52 provides a return channel for the A oil port 12 and the B oil port 2 13, thereby driving the two hydraulic motors to move in opposite directions.

[0053] When a single hydraulic motor is required to rotate independently, the valve core sleeve 4 is rotated and switched so that the B oil port 11 and the A oil port 12 are blocked by the corresponding blocking blocks 43, and the A oil port 2 14 and the B oil port 2 13 are connected to the corresponding crescent groove 42 to generate oil circuit circulation.

[0054] The present invention adopts a rotating valve core sleeve 4 to adjust the oil circuit direction and oil circuit control of the valve block 1 with six channels. Compared with the control method of combining the traditional valve block structure with multiple groups of solenoid valves, the adjustment stroke is small, the structure is simple, and it is easy to disassemble and maintain. At the same time, it avoids the traditional electromagnetic control method of axial displacement. There is no additional hydraulic shock to cause axial displacement impact on the control valve core, and the hydraulic control accuracy is improved. Through the design of the spiral opening groove 1 51, the spiral opening groove 2 52 and the crescent groove 42, while controlling the oil circuit, the impact of oil pressure on the rotating valve core sleeve 4 is further buffered.

[0055] See also Figure 12-16 The packaging mechanism 3 includes a port cover 31, and both ends of the valve groove 15 are provided with assembly grooves 17 that match the port cover 31. The opposite ends of the two groups of port covers 31 are rotatably connected to the sealing bearings 2 33, and the valve core sleeve 4 is rotatably connected between the two groups of sealing bearings 2 33, ensuring that the valve core sleeve 4 can rotate flexibly while ensuring the sealing inside the valve groove 15.

[0056] The anti-impact mechanism is arranged on the opposite side of the two groups of packaging mechanisms 3, including a buffer member 34 arranged in the port cover 31, one end of the buffer member 34 is rotatably connected to the piston 341, and a sliding cavity 311 matching the piston 341 is provided in the port cover 31, and the opening of the sliding cavity 311 is detachably connected to the oil chamber cover 32, and the oil chamber cover 32 is rotatably connected to the drive shaft 36 through a sealing bearing 321. A spline shaft 361 is fixed to the end of the drive shaft 36 away from the oil chamber cover 32, and a spline groove 53 corresponding to the spline shaft 361 is provided at the end of the valve core sleeve 4, and a buffer spring 37 is also clamped between the drive shaft 36 and the valve core sleeve 4.

[0057] A buffer cone head 342 is provided at the end of the buffer member 34 away from the piston 341, and a sliding cavity 2 312 corresponding to the buffer cone head 342 is provided in the port cover 31. A main oil channel 343 is provided in the buffer member 34, and the drive shaft 36 is rotatably connected in the buffer member 34. The main oil channel 343 is connected to one end of the valve core sleeve 4 with several diversion oil channels 344 evenly distributed at equal angles. The diversion oil channel 344 is a spiral channel, and its output direction is tangent to the circumferential direction of the buffer cone head 342, so that the hydraulic oil can form a rotational flow when entering the sliding cavity 2 312, converting the impact force of the hydraulic oil into the rotational kinetic energy of the buffer cone head 342, thereby further buffering the hydraulic shock.

[0058] The buffer spring 37 has the elastic force to drive the buffer member 34 and the drive shaft 36 away from the valve core sleeve 4. The valve core rod 5 is provided with an oil-passing notch 501 at the end away from the spiral opening groove 1 51 and the spiral opening groove 2 52. The spiral opening groove 1 51 and the spiral opening groove 2 52 are respectively connected to the corresponding sliding cavity 2 312 through the oil-passing notch 501. When the hydraulic system generates an impact, the buffer member 34 slides in the sliding cavity 1 311 under the action of the piston 341, compressing the buffer spring 37 and absorbing the impact energy; at the same time, the hydraulic oil enters the sliding cavity 2 312 through the main oil channel 343 to further buffer the impact.

[0059] The P oil port 301 and the T oil port 302 are respectively arranged on the corresponding oil chamber cover 32 to facilitate the input and output of hydraulic oil. The end of the drive shaft 36 at one end extends through the oil chamber cover 32 and is transmission-connected to the output end of the actuator motor 2. The actuator motor 2 is used to drive the valve core sleeve 4 to rotate at a fixed angle, thereby realizing the switching of the flow direction of the hydraulic oil.

[0060] See also Figure 17-18 The drive shaft 36 is also provided with a filter cover 35 in the sliding cavity 2 312. The filter cover 35 includes a mounting ring 351 for fixing to the end of the buffer cone head 342. A conical shell 355 is fixed in the filter cover 35. The conical shell 355 divides the filter cover 35 into a discharge bin 354, an oil inlet bin 353 and a collection bin 352. The discharge bin 354 is a conical cavity, and the collection bin 352 is a semi-circular cavity. The output end of the diverter oil channel 344 is arranged in the oil inlet bin 353. The conical shell 355 is an S-shaped conical elastic cover structure with an S-shaped cross-section. An elastic node 3552 is provided near the side of the collection bin 352. The elastic node 3552 has an elastic force that drives the conical shell 355 close to the buffer cone head 342. The conical shell 355 is provided with a filter screen 1 3551 between the discharge bin 354 and the oil inlet bin 353, and a filter screen 2 3541 is provided at the discharge end of the discharge bin 354.

[0061] The filter cover 35 can perform two-stage filtration on the hydraulic oil to remove impurities and pollutants therein. Specifically, when the diverter oil channel 344 is output to the oil inlet bin 353, since the buffer cone head 342 keeps rotating in the oil inlet state, the filter cover 35 rotates accordingly. At this time, the oil in the oil inlet bin 353 uses centrifugal force to separate the large impurities and move them along the inclined surface of the conical shell 355 to the side of the oil inlet bin 353. At the same time, the rotating centrifugal force of the filter cover 35 and the impact force of the oil inlet cause the filter screen 3551 of the conical shell 355 to move away from the rotation axis, driving the elastic node 355 2 is away from the buffer cone head 342, thereby opening the collection chamber 352 and allowing impurities to enter the collection chamber 352. During the oil inlet process, centrifugal force always exists, so the impurities entering the collection chamber 352 will always be stored in the collection chamber 352. When the oil inlet is completed, the elastic node 3552 is reset to close the collection chamber 352, maintaining the impurity collection effect. In later maintenance, the filter cover 35 can be directly disassembled or cleaned to arrange the impurities. The design of the filter cover 35 can effectively separate impurities in the hydraulic oil and prevent impurities from entering the valve core sleeve 4, causing poor rotation or sealing damage.

[0062] The hydraulic oil in the oil inlet tank 353 is filtered through the filter screen 1 3551 and then enters the discharge tank 354. After secondary filtration by the filter screen 2 3541, it enters the sliding cavity 2 312 and is transported through the oil notch 501 to the spiral opening groove 1 51 or the spiral opening groove 2 52, completing the oil supply process and ensuring the cleanliness and normal operation of the hydraulic system.

[0063] The present invention is designed with a buffer spring 37, a buffer member 34 and a buffer member 34 with a diverter oil channel 344. When a hydraulic shock occurs, the buffer spring 37 is compressed to absorb energy, and the buffer member 34 slides in the sliding cavity 311. At the same time, the diverter oil channel 344 causes the hydraulic oil to form a rotational flow, converting the impact force into the rotational kinetic energy of the buffer cone head 342. Compared with the traditional valve block, it can effectively absorb and buffer the impact energy generated by the hydraulic system, thereby improving the impact resistance and reliability of the valve block. At the same time, combined with the rotation action of the buffer cone head 342, the design of the filter cover 35 realizes two-stage filtration of the hydraulic oil. By utilizing centrifugal force and elastic structure, impurities in the hydraulic oil can be effectively separated to prevent impurities from entering the valve core sleeve 4 and causing poor rotation or sealing damage, thereby extending the service life of the valve block and ensuring the stable operation of the hydraulic system.

[0064] At the same time, the present invention adopts a rotating valve core sleeve 4 to adjust the direction of the oil circuit. Compared with the traditional electromagnetic control method of axial displacement, the adjustment stroke is small, which avoids the influence of the axial displacement of the valve core caused by the additional hydraulic shock generated by the electromagnetic control. Through the crescent groove 42, the spiral opening groove 1 51 and the spiral opening groove 2 52 and other structures, the flow direction and flow of the hydraulic oil can be effectively controlled to meet the needs of high-precision hydraulic systems. The valve block structure of the present invention abandons the complex structure of the traditional valve block combined with multiple groups of solenoid valves, and realizes multi-oil circuit control by rotating the valve core sleeve 4. The structure is simpler. The valve core sleeve 4 is encapsulated in the valve groove 15 by the encapsulation mechanism 3. When disassembling and maintenance, it is only necessary to remove the port cover 31 and other components to conveniently inspect and replace the internal components such as the valve core sleeve 4 and the valve core rod 5, thereby reducing maintenance costs and equipment downtime.

[0065] The above is only the best implementation method adopted by this application in combination with current actual needs, but the scope of protection of this application is not limited to this.

Claims

1. A shock-resistant hydraulic valve block, characterized by: The invention comprises a valve block (1) provided with a B oil port 1 (11), an A oil port 1 (12), a B oil port 2 (13) and an A oil port 2 (14); a valve groove (15) is provided in the valve block (1); a valve core sleeve (4) is encapsulated in the valve groove (15) by two groups of encapsulation mechanisms (3); the B oil port 1 (11), the A oil port 1 (12), the B oil port 2 (13) and the A oil port 2 (14) are respectively provided with a connection point with the valve groove (15); and the four groups of the connection points are arranged at equal distances in the vertical direction and at equal angles in the circumferential direction; The valve core sleeve (4) is rotatably connected to the valve groove (15), and the outer wall of the valve core sleeve (4) is provided with a crescent groove (42) corresponding to the connection point one by one, and a valve core rod (5) is fixed in the valve core sleeve (4) through an interference groove (45), and the outer wall of the valve core rod (5) is provided with a spiral opening groove 1 (51) and a spiral opening groove 2 (52) arranged in rotational symmetry, and a through hole (421) is provided in the crescent groove (42), and two spaced through holes (421) are both connected to the spiral opening groove 1 (51), and the other two spaced through holes (421) are both connected to the spiral opening groove 2 (52), and the two groups of the packaging mechanisms (3) are respectively provided with a P oil port (301) connected to the spiral opening groove 1 (51) and a T oil port (302) connected to the spiral opening groove 2 (52); The valve block (1) is also provided with an actuator motor (2) for driving the valve core sleeve (4) to rotate at a fixed angle, and the two sets of packaging mechanisms (3) are provided with anti-impact mechanisms on opposite sides.

2. The impact-resistant hydraulic valve block according to claim 1, characterized in that: A sealing groove (41) is provided in the middle of the valve core sleeve (4), and a sealing ring (16) matching the sealing groove (41) is provided in the valve groove (15); The four crescent grooves (42) are arranged equidistantly in the vertical direction and evenly distributed at equal angles in the circumferential direction. The valve core sleeve (4) is provided with a blocking block (43) on the side away from the crescent groove (42). The four crescent grooves (42) are grouped in pairs, and an oblique separation ring (44) is further provided between the two crescent grooves (42) in the same group.

3. The impact-resistant hydraulic valve block according to claim 2, characterized in that: Two sets of sealing rubber sleeves (401) are fixedly sleeved on the outer wall of the valve core sleeve (4), and the sealing rubber sleeve (401) is provided with an opening corresponding to the crescent groove (42). The inner diameter of the sealing rubber sleeve (401) is equal to the outer diameter of the sealing block (43) and the crescent groove (42), and the outer diameter of the sealing rubber sleeve (401) is larger than the inner diameter of the valve groove (15).

4. The impact-resistant hydraulic valve block according to claim 2, characterized in that: The projections of the two blocking blocks (43) in the same group on the horizontal plane have overlapping parts; The arc length angle of the crescent groove (42) on the circumference is not less than 90°, and the maximum groove width of the crescent groove (42) in the vertical direction is not less than the vertical arrangement spacing of the four groups of connection points.

5. The impact-resistant hydraulic valve block according to claim 1, characterized in that: The packaging mechanism (3) includes a port cover (31), and both ends of the valve groove (15) are provided with assembly grooves (17) that match the port cover (31). The opposite ends of the two groups of port covers (31) are rotatably connected to the second sealing bearing (33), and the valve core sleeve (4) is rotatably connected between the two groups of second sealing bearings (33). The anti-impact mechanism includes a buffer member (34) arranged in the port cover (31), one end of the buffer member (34) is rotatably connected to the piston (341), and the port cover (31) is provided with a piston (341) that matches the piston. (341) is matched with a sliding cavity (311), the opening of the sliding cavity (311) is detachably connected to an oil cavity cover (32), a driving shaft (36) is rotatably connected in the oil cavity cover (32) via a sealing bearing (321), a spline shaft (361) is fixed to one end of the driving shaft (36) away from the oil cavity cover (32), a spline groove (53) corresponding to the spline shaft (361) is provided at the end of the valve core sleeve (4), and a buffer spring (37) is further clamped between the driving shaft (36) and the valve core sleeve (4); The buffer member (34) is provided with a buffer cone head (342) at one end away from the piston (341), and a second sliding cavity (312) corresponding to the buffer cone head (342) is provided in the port cover (31). A main oil channel (343) is provided in the buffer member (34), and the drive shaft (36) is rotatably connected to the buffer member (34). The main oil channel (343) is connected to a plurality of diversion oil channels (344) evenly distributed at equal angles at one end close to the valve core sleeve (4).

6. The impact-resistant hydraulic valve block according to claim 5, characterized in that: The diverter oil passage (344) is a spiral passage, and the output direction of the diverter oil passage (344) is arranged tangentially to the circumferential direction of the buffer cone head (342).

7. The impact-resistant hydraulic valve block according to claim 5, characterized in that: The buffer spring (37) has an elastic force for driving the buffer member (34) and the drive shaft (36) away from the valve core sleeve (4). The valve core rod (5) is provided with an oil-passing notch (501) at one end away from the spiral opening groove 1 (51) and the spiral opening groove 2 (52). The spiral opening groove 1 (51) and the spiral opening groove 2 (52) are respectively connected to the corresponding sliding cavity 2 (312) through the oil-passing notch (501).

8. The impact-resistant hydraulic valve block according to claim 5, characterized in that: The P oil port (301) and the T oil port (302) are respectively arranged on the corresponding oil chamber cover (32), and the end of the drive shaft (36) at one end extends through the oil chamber cover (32) and is transmission-connected to the output end of the actuator motor (2).

9. The impact-resistant hydraulic valve block according to claim 5, characterized in that: The drive shaft (36) is further provided with a filter cover (35) in the second sliding cavity (312). The filter cover (35) includes a mounting ring (351) for fixing to the end of the buffer cone head (342). A conical shell (355) is fixed in the filter cover (35). The conical shell (355) divides the filter cover (35) into a discharge bin (354), an oil inlet bin (353) and a collection bin (352). The discharge bin (354) is a conical cavity, and the collection bin (352) is a semi-circular cavity. The output end of the diverter oil passage (344) is arranged in the oil inlet bin (353).

10. The impact-resistant hydraulic valve block according to claim 9, characterized in that: The conical shell (355) is an S-shaped conical elastic cover structure in cross section. An elastic node (3552) is provided on the side of the conical shell (355) close to the collecting chamber (352). The elastic node (3552) has an elastic force that drives the conical shell (355) close to the buffer cone head (342). The conical shell (355) is provided with a filter screen 1 (3551) between the discharge chamber (354) and the oil inlet chamber (353). The discharge end of the discharge chamber (354) is provided with a filter screen 2 (3541).

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