Multi-way valve rotating bucket positioning device

Abstract

The application discloses a multi-way valve rotating bucket joint positioning device, which comprises a multi-way valve, wherein the multi-way valve comprises a valve body, the end of the valve body is equipped with a positioning device, the inside of the positioning device is equipped with a reset device, the end of the reset device is equipped with a resetter, and the resetter is arranged at the maximum stroke position of the end of a multi-way valve control device. The application drives the displacement of a valve rod by a manual operating rod, and a steel ball at the end of the valve rod is bounced and positioned in the inside of a positioning sleeve, so that the valve rod can be automatically kept at a required gear. An operator does not need to keep the gear at any time, work efficiency and safety are improved, the problem that an operator must keep a handle in a gear by hand when operating a rotating bucket or a collecting bucket is effectively solved, the labor intensity of the operator is reduced, a reset function is provided when a control end reaches a limit stroke, the safety of the device is improved, energy loss and device loss are reduced, and the structure is simple, stable and easy to maintain.

Description

Technical Field

[0001] This invention relates to the field of multi-way valves, specifically a multi-way valve rotating bucket positioning device. Background Technology

[0002] Multi-way valves are a key component in the hydraulic systems of construction machinery. They are highly integrated multi-functional valves that combine directional valves, check valves, relief valves, and replenishing valves. Multi-way valves are mainly divided into manual multi-way valves and hydraulically controlled multi-way valves. Manual multi-way valves are controlled directly by a lever via a mechanical connection, allowing for direct control of the valve stem. This type of control offers good micro-motion characteristics and is simple to operate and replace, making it widely used. However, because control is achieved through a lever, operators sometimes cannot precisely control the valve stem displacement. Furthermore, the bucket linkage of multi-way valves is controlled by a spring-reset assembly, requiring operators to keep the lever in the designated position constantly during tipping or retracting operations, thus increasing the operator's workload. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-way valve rotating bucket positioning device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a multi-way valve rotating bucket positioning device, comprising a multi-way valve, the multi-way valve including a valve body, a valve stem for controlling the direction of hydraulic oil being assembled inside the valve body, a positioning device for temporarily positioning the valve stem being assembled at the end of the valve stem, a reset device being assembled inside the positioning device, the reset device being able to disable the positioning mechanism of the positioning device and reset the entire valve stem, a reset device being assembled at the end of the reset device, the reset device being assembled at the maximum stroke position at the end of the multi-way valve control device; the positioning device including a fixed cover, a positioning core being fixedly assembled inside the fixed cover, the positioning core being sleeved inside the end of the valve stem; a sliding hole being opened at the end of the valve stem, a positioning spring being provided at the center of the sliding hole, steel balls being sleeved on both sides of the positioning spring inside the sliding hole, an annular groove with the same diameter as the steel ball being opened inside the positioning core, the steel ball being tightly fitted to the inner wall of the groove or the inner wall of the positioning core; a guide groove being opened on the outer side of the fixed cover; The reset device includes an elastic annular spring, the end of which is hinged to the inside of the positioning core. The annular spring extends through the inside of the guide groove, passing around the positioning point at the end of the annular spring. A flexible wire core is fitted on the outside of the extension section of the annular spring. The displacement of the wire core can cause the annular spring to stretch and contract around the outside of all the steel balls and the positioning point at the end of the annular spring, changing the inner diameter of the annular spring.

[0005] Preferably, the valve body has an oil port connected to the control pipeline on its exterior, and the valve stem is slidably assembled inside the valve body. The axial displacement of the valve stem can drive the valve block outside the valve stem to change the hydraulic oil flow rate and switching between the oil ports.

[0006] Preferably, the top of the valve body has a through mounting hole, and the outside of the valve body is fitted with a valve core for reversing, throttling, pressure regulation, check valve and flow diversion.

[0007] Preferably, a set of the positioning core includes a positioning kit 1, a positioning kit 3, and several positioning kits 2. The positioning kit 1, positioning kit 2, and positioning kit 3 are sequentially connected and fitted with spacers at the installation gaps. A connecting rod is installed through the center of the positioning kit 1, positioning kit 2, positioning kit 3, and the spacers. Nuts are screwed to both ends of the connecting rod, and the nuts are tightly fitted and fixed to the outer walls of the positioning kit 1 and positioning kit 3.

[0008] Preferably, the slot is formed in a ring shape at the inner edge of positioning kit one and positioning kit three, and at the inner edges of both sides of positioning kit two.

[0009] Preferably, the outer side of the slots of positioning kit one, positioning kit two, and positioning kit three, and the inner side of the connecting rod installation position, are all provided with spring plate positioning holes, and spring plate positioning pins are fixedly installed inside the spring plate positioning holes.

[0010] Preferably, the outer sleeve is fitted around the core wire, and annular plates are positioned and installed at both ends of the outer sleeve. A fixing frame is fitted on the bottom outer wall of the guide groove, and the outer sleeve is fixedly installed with the fixing frame.

[0011] Preferably, the annular spring includes a socket piece fixed to the wire core. The end of the socket piece is integrally cut with claw pieces, which have the same number of gaps as the gaps between the first positioning kit, several sets of second positioning kits, and third positioning kits. The end of the claw piece away from the socket piece is bent into a spring head. A circular hole is formed at the center of the spring head, and the circular hole is sleeved and positioned with the outside of the spring positioning pin.

[0012] Preferably, the resetter includes a fixing member, a slot is provided on one side of the fixing member, the slot is fixedly installed with the end of the outer tube, a flipping member is rotatably installed inside the fixing member, a connector is fixed to the end of the wire core, the connector is hinged to one end of the flipping member, a pressing member is slidably connected to the other end of the flipping member, the pressing member slides linearly outside the fixing member, and a reset spring is assembled between the pressing member and the fixing member.

[0013] Preferably, the outer wall of the fixing member is provided with a sliding groove, the pressing member is slidably assembled inside the sliding groove, the two sides of the flipping member are provided with slots, the installation position of the flipping member and the connector is slidably assembled with a connecting pin, and the other end of the pressing member and the flipping member is slidably assembled with a sliding shaft.

[0014] Compared with the prior art, the beneficial effects of this invention are as follows: This invention provides a spring-reset device in a multi-way valve by replacing the spring-resetting device in the existing mechanical multi-way valve with a spring-loaded positioning device. The valve stem is displaced by a manual operating lever, and the steel ball at the end of the valve stem bounces and positions itself inside the positioning sleeve, automatically maintaining the desired position. Operators do not need to constantly maintain the position, improving work efficiency and safety. Furthermore, before the operating end reaches its maximum stroke position, two adjacent components at the operating end squeeze and displace the fixing and pressing parts inwards. The flipping component flips the core, causing it to slide inside the outer sleeve, pulling the sleeve outwards. Because the end of the claw is positioned... Therefore, the change in the circumference of the claw will reduce the inner diameter of the claw, thereby reducing the diameter and moving the steel ball stuck inside the slot inward, losing the limit depth of the engagement. This results in the steel ball being unable to be fully engaged and positioned. The return spring pushes the valve stem to reset, thus achieving the effect of passive one-piece reset and valve closure. This effectively solves the problem that operators must manually operate the handle to keep it in the gear position when operating the tipping or bucket retraction action, increasing the labor intensity of the operator. It also has a one-piece reset function when the end reaches the limit stroke, improving the safety of the equipment, reducing energy consumption and equipment wear, and has a simple, stable structure that is easy to maintain. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention;

[0016] Figure 2 This is a top view of the present invention;

[0017] Figure 3 for Figure 2 Schematic diagram of the release state of the cross-section at point AA;

[0018] Figure 4 for Figure 2 Schematic diagram of the tightened cross-section at point AA;

[0019] Figure 5 This is an exploded view of the present invention;

[0020] Figure 6 This is a schematic diagram of the fixed cover structure of the present invention;

[0021] Figure 7 This is a schematic diagram of the positioning kit of the present invention;

[0022] Figure 8This is a schematic diagram of the positioning device of the present invention in the released state assembly.

[0023] Figure 9 This is a schematic diagram of the positioning device of the present invention in the tightened state assembly.

[0024] Figure 10 This is a schematic diagram of the reset device structure of the present invention;

[0025] Figure 11 This is a schematic diagram of the resetter structure of the present invention;

[0026] Figure 12 This is a schematic diagram of the release state in cross-sectional view of the reset device of the present invention;

[0027] Figure 13 This is a schematic diagram of the tightened state in cross-sectional view of the resetter of the present invention;

[0028] Figure 14 for Figure 3 Enlarged schematic diagram of the structure at point a;

[0029] Figure 15 for Figure 4 Enlarged schematic diagram of the structure at point b.

[0030] In the diagram: 1. Multi-way valve; 11. Valve body; 12. Oil port; 13. Mounting hole; 14. Valve stem; 15. Valve core; 16. Slide hole; 17. Steel ball; 18. Positioning spring; 2. Positioning device; 21. Fixing cover; 22. Positioning kit one; 23. Positioning kit two; 24. Positioning kit three; 25. Spacer; 26. Connecting rod; 27. Nut; 28. Slot; 29. ​​Spring positioning hole; 210. 211. Spring positioning pin; 3. Guide groove; 3. Reset device; 31. Fixing bracket; 32. Outer tube; 33. Wire core; 34. Annular spring; 341. Sleeve piece; 342. Claw piece; 343. Spring head; 35. Connector; 4. Resetter; 41. Fixing part; 42. Slot; 43. Slide groove; 44. Flipping part; 45. Sliding shaft; 46. Pressing part; 47. Reset spring; 48. Connecting pin. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figure 1-15This invention provides a technical solution: a multi-way valve rotating bucket positioning device, including a multi-way valve 1, the multi-way valve 1 including a valve body 11, a valve stem 14 for controlling the direction of hydraulic oil is assembled inside the valve body 11, a positioning device 2 for temporarily positioning the valve stem 14 is assembled at the end of the valve stem 14, a reset device 3 is assembled inside the positioning device 2, the reset device 3 can disable the positioning mechanism of the positioning device 2 and reset the entire valve stem 14, a reset device 4 is assembled at the end of the reset device 3, the reset device 4 is assembled at the maximum stroke position at the end of the control device of the multi-way valve 1; the positioning device 2 includes a fixed cover 21, a positioning core is fixedly assembled inside the fixed cover 21, and the positioning core is sleeved inside the end of the valve stem 14; A sliding hole 16 is provided at the end of the valve stem 14. A positioning spring 18 is provided at the center of the sliding hole 16. Steel balls 17 are sleeved on both sides of the positioning spring inside the sliding hole 16. A circular groove 28 with the same diameter as the steel ball 17 is provided inside the positioning core. The steel ball 17 is tightly fitted to the inner wall of the groove 28 or the inner wall of the positioning core. A guide groove 211 is provided on the outer side of the fixed cover 21. The reset device 3 includes an elastic annular spring 34. The end of the annular spring 34 is hinged to the inside of the positioning core. The annular spring 34 extends through the inside of the guide groove 211 in a ring shape, passing around the positioning point at the end of the annular spring 34. A flexible wire core 33 is fitted on the outer side of the extension section of the annular spring 34. The displacement of the wire core 33 can drive the annular spring 34 to stretch and contract around the outer side of all the steel balls and the positioning point at the end of the annular spring 34, changing the inner diameter of the annular spring 34.

[0033] This invention provides a spring-reset device in a multi-way valve, replacing the spring-loaded positioning device in existing mechanical multi-way valves. The valve stem 14 is displaced by a manual operating lever, and the steel ball at the end of the valve stem bounces and positions itself inside the positioning sleeve, automatically maintaining the desired position. Operators no longer need to constantly maintain the position, improving work efficiency and safety. Furthermore, before the operating end reaches its maximum stroke position, two adjacent components at the operating end compress and displace the fixing member 41 and the pressing member 46 inwards. The flipping member 44 flips, causing the wire core 33 to slide inside the outer sleeve 32, pulling the sleeve piece 341 outwards. Since the end of the claw piece 342 is positioned, the claw piece 34... The change in the circumference of 2 will reduce the inner diameter of the claw 342, thereby reducing the diameter and moving the steel ball 17 stuck inside the slot 28 inward, losing the limit depth of the engagement. This results in the steel ball 17 being unable to be fully engaged and positioned. The return spring pushes the valve stem 14 to reset, thus achieving the effect of passive one-piece reset and valve closure. This effectively solves the problem that operators must manually operate the handle to keep it in the gear position when operating the tipping or bucket retraction action, increasing the labor intensity of the operators. It also has a one-piece reset function when the end reaches the limit stroke, improving the safety of the equipment, reducing energy consumption and equipment wear, and has a simple, stable, and easy-to-maintain structure.

[0034] Specifically, the valve body 11 has an oil port 12 connected to the control pipeline on its outside. The valve stem 14 is slidably assembled inside the valve body 11. The axial displacement of the valve stem 14 can drive the valve block outside the valve stem 14 to change the hydraulic oil on / off state and flow ratio between the oil ports 12. A large return spring is provided between the valve stem 14 and the fixed cover 21. To avoid making the picture too complicated, the large return spring is omitted. The large return spring is located between the inner wall of the inner plane of the fixed cover 21 and the end section of the valve stem 14.

[0035] Specifically, the top of the valve body 11 has a through mounting hole 13, and the outside of the valve body 11 is equipped with a valve core 15 for reversing, throttling, pressure regulation, check valve and flow diversion. The valve core 15 used in this invention can be divided into reversing, throttling, pressure regulation, check valve and flow diversion types according to its function. It is used to control the direction, flow rate, pressure and on / off state of the fluid to realize the multiple functional requirements of the hydraulic or pneumatic system. When using different multi-way valves, the appropriate valve core can be selected according to the requirements.

[0036] Specifically, a positioning core includes a positioning kit 1 22, a positioning kit 3 24, and several positioning kits 23. Positioning kits 1 22, 23, and 3 24 are sequentially connected and fitted with spacers 25 at the installation gaps. A connecting rod 26 is installed through the center of positioning kits 1 22, 23, 3 24, and spacers 25. Nuts 27 are screwed to both ends of the connecting rod 26, and the nuts 27 are tightly fitted and fixed to the outer walls of positioning kits 1 22 and 3 24. In use, by connecting the screws 26, the three kits can be increased or decreased according to the number of slots required by connecting the holes, and multiple positions can be freely assembled. When the valve body is universal, only the outward positioning device 2 needs to be replaced to achieve multiple positions, which is convenient and quick to use.

[0037] Specifically, the slot 28 is formed in a ring shape on the inner edge of positioning kit 1 22 and positioning kit 3 24, and on the inner edges of both sides of positioning kit 23.

[0038] The arc of the slot 28 is related to the spacing controlled by the spacer 25. The fixed distance between the spacers 25 of a single size can accommodate steel balls 17 of a certain diameter. When the steel balls are the same size, the size of the spacer 25 can remain unchanged. By opening the annular slot 28 according to the spacing of the steel balls and cutting off the middle part, positioning kit 1 22, positioning kit 23 and positioning kit 3 24 can be formed. In use, when the annular spring 34 is in a relaxed state, the steel ball can be inserted into the slot 28 to a certain depth when passing through the slot 28 and the spacing gap to achieve the positioning effect. This depth is the position of the center line of the annular groove of the slot 28. This position is related to the spring thrust of the valve stem 14 for reset. Half of the depth is conventionally set to one-third of the radius of the steel ball.

[0039] The number of connecting screws 26 is preferably an odd number, ideally five. Since the structure is relatively thin to meet the installation position, five numbers can provide sufficient support and tightness while also leaving more space to facilitate the installation of the annular spring 34. The reason for using an odd number of numbers is that the connecting line between the two steel balls 17 passes through the axis of the valve stem 14. Therefore, the connecting line or surface between the axes of the two connecting screws 26 with the largest distance does not pass through the positioning core concentric with the valve stem 14, avoiding the steel ball encountering an odd point and being unable to be positioned. At least in extreme cases, if one steel ball hits the spacer 25, the other steel ball 17 will not be unable to be positioned.

[0040] Specifically, the outer side of the slot 28 of positioning kit 1 22, positioning kit 23 and positioning kit 3 24, and the inner side of the mounting position of the connecting rod 26, are all provided with spring plate positioning holes 29, and spring plate positioning pins 210 are fixedly installed inside the spring plate positioning holes 29.

[0041] The positioning device and the integrated reset device 3 require the following procedures during installation:

[0042] The first type is the basic installation plan.

[0043] First, select a suitable number of positioning kits 1 (22), 23 (23), and 3 (24) with rounded corners and smooth, burr-free edges. Place them horizontally on the table with the slot 28 of positioning kit 1 (22) facing upwards. Then, set up the spacer 25 and align the holes of the spacer 25 with the holes of positioning kit 1 (22). Then, set up positioning kit 23 and spacer 25 in a similar manner. After setting up several sets, finally, align the slot 28 of positioning kit 3 (24) downwards with the uppermost spacer 25 and align the holes.

[0044] After placement, pass the connecting screw 26 through the mounting hole and the center hole of the spacer 25, screw a nut into the top first, then press down the positioning kit 3 24 and pinch the side wall of the positioning kit 1 22 to reverse the whole, and finally screw the nut to achieve a complete clamping effect, forming a complete positioning core.

[0045] Then, the positioning core is placed into the fixing cover 21, and the set screw is screwed into the screw hole on the outer wall of the fixing rod 21. The set screw abuts against one of the positioning kits 23 with an external groove for positioning. Then, the annular spring piece 34 is inserted from the center of the guide groove 211. The claw piece 342 is inserted into the positioning core from the inside of the spacer 25 from the nearest position. A spring piece positioning pin 210 is temporarily inserted into the hole at the end of the claw pieces 342. The claw piece 342 with the spring piece positioning pin 210 installed is guided inward and the annular spring piece 34 is moved inward at the same time. The claw piece 342 is formed into a ring and moved to the vicinity of the spring piece positioning hole 29. Finally, the temporary spring piece positioning pin 210 is pulled out and the spring piece positioning pin 210 is inserted into the inside of the spring piece positioning hole 29 to complete the installation process.

[0046] All of the above methods can be implemented by designing a simple mold or by using a mold in conjunction with automated equipment. In addition to the above methods, there are two other options:

[0047] One of the second installation schemes involves inserting the internal opening of the guide groove 211 of the fixed cover 21 through to the mounting surface between the fixed cover 21 and the valve body 11. After assembling the positioning core, the claw 342 of the annular spring 34 is first combined with the spring positioning pin 210 and the spring positioning hole 29, then wrapped around the entire circle and inserted into the opening of the fixed cover 21 and the through groove of the guide groove 211.

[0048] Another method involves creating grooves on the coaxial positions of all positioning kits 22, 23, and 24. After assembling and fixing the positioning core, guide the annular spring 210 into the interior of the spacer 25. Before the temporary spring positioning pin 210 is pulled out, insert a square rod into the groove. After the temporary spring positioning pin 210 is pulled out, the claw 342 rebounds and is intercepted by the square rod. Then, it can be directly inserted into the spring positioning pin 210 to achieve installation.

[0049] Alternatively, the first or third installation method can be used. Using a key-shaped L-shaped tool, after pulling out the temporary spring positioning pin 210, when inserting the spring positioning pin 210, use the short rod of the L-shaped tool to push the claw 342 inward each time the spring positioning pin 210 is inserted into a gap, so that the hole is aligned with the spring positioning pin 210.

[0050] The outer sleeve 32 is sleeved around the core 33. Annular plates are positioned at both ends of the outer sleeve 32. A fixing bracket 31 is fitted on the bottom outer wall of the guide groove 211. The outer sleeve 32 is fixedly installed with the fixing bracket 31. The cooperative structure of the core 33 and the outer sleeve 32 is the most commonly used brake cable in the prior art. The outer sleeve 32 is responsible for fixing, protecting, and guiding, assisting the core 33 to slide inside it, thereby achieving a flexible connection between two relatively moving parts. It is commonly used in the braking systems of bicycles, motorcycles, and automobiles, as well as in the opening of the engine compartment of automobiles, etc., for flexible connections at the remote ends of mechanical parts. The structure is simple, easy to obtain, and easy to install, making it very suitable for this invention.

[0051] The annular spring 34 includes a socket piece 341 fixed to the wire core 33. The end of the socket piece 341 is integrally cut with claw pieces 342, which are the same number of gaps between the positioning kit 1 22, several positioning kits 23 and positioning kit 3 24. The end of the claw piece 342 away from the socket piece 341 is bent into a spring head 343. A round hole is formed at the center of the spring head 343, and the round hole is externally socketed and positioned with the spring positioning pin 210.

[0052] The resetter 4 includes a fixing member 41. A slot 42 is provided on one side of the fixing member 41. The slot 42 is fixedly installed at the end of the outer sleeve 32. A flipping member 44 is rotatably installed inside the fixing member 41. A connector 35 is fixed at the end of the wire core 33. The connector 35 is hinged to one end of the flipping member 44. A pressing member 46 is slidably connected to the other end of the flipping member 44. The pressing member 46 slides linearly outside the fixing member 41. A reset spring 47 is assembled between the pressing member 46 and the fixing member 41.

[0053] The outer wall of the fastener 41 is provided with a groove 43, the pressing part 46 is slidably assembled inside the groove 43, the two sides of the flipping part 44 are provided with slots, the flipping part 44 and the mounting position of the connector 35 are slidably assembled with a connecting pin 48, and the other end of the pressing part 46 and the flipping part 44 are slidably assembled with a sliding shaft 45.

[0054] When the entire reset unit 4 is in operation, it is positioned between two adjacent parts at the control end, such as the hinge point of the loader bucket. When the bucket reaches its maximum position, it will press down on the pressing part 46, triggering the compression of the reset spring 47. The tilting part 44 will then tilt around the central junction point (e.g., Figure 12 and Figure 13As shown), the hinge point on the right is pressed down, and the left side rises. Due to the fixation of the outer sleeve 32, the flexible wire core 33 is stretched from the inside of the outer sleeve 32, and the wire core 33 is displaced outward as a whole, thereby pulling one side of the sleeve piece 341. Since the end of the claw piece 342 is positioned, the length of the claw piece 342 inside the positioning core changes. After being converted into a geometric principle, that is, the circumference changes, while the approximate center remains unchanged. The claw piece 342 contracts inward, thereby filling the groove that can accommodate the steel ball 17 (as shown). Figure 3 and Figure 4 (The claw plate 342 on the right side changes inside and out), so the steel ball 17 loses its locking depth, and the valve stem 14 will be pushed by the reset spring to achieve the reset effect.

[0055] It should be noted that the annular spring 34 is made of a flexible steel sheet with toughness and elasticity, or it can be made of other materials, such as plastic with high toughness or other materials that can achieve the effect in this application.

[0056] Furthermore, the core 33 is also made of flexible steel wire or other tough cylindrical or braided material that is not easily deformed by pushing or pulling, and can be displaced inside the outer tube 32 by pushing and pulling.

[0057] In actual use, a tension spring can also be set between the socket 341 and the fixing bracket 31 to assist the core 33 in resetting, which is suitable for locations where the installation positions of the outer tube 32 and the core 33 are too far apart.

[0058] In addition to being used in conjunction with the resetter 4, one end of the connector of the reset device 3 of this application can also be equipped with a slider at the bottom of the manual operating lever. When operating from the cab, the operator can lift the slider upwards to pull the wire core 33 out from the fixed outer sleeve 32, which can achieve the same reset effect.

[0059] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-way valve rotating bucket positioning device, comprising a multi-way valve (1), characterized in that: The multi-way valve (1) includes a valve body (11), inside which a valve stem (14) for controlling the direction of hydraulic oil is installed. At the end of the valve stem (14) is a positioning device (2) that can temporarily position the valve stem (14). Inside the positioning device (2) is a reset device (3). The reset device (3) can cause the positioning mechanism of the positioning device (2) to fail and reset the entire valve stem (14). At the end of the reset device (3) is a resetter (4). The resetter (4) is installed at the maximum stroke position at the end of the control device of the multi-way valve (1). The positioning device (2) includes a fixed cover (21), inside which a positioning core is fixedly installed. The inside of the positioning core is sleeved on the end of the valve stem (14). The valve stem (14) has a sliding hole (16) at its end. A positioning spring (18) is provided at the center of the sliding hole (16). Steel balls (17) are sleeved on both sides of the positioning spring inside the sliding hole (16). The positioning core has an annular groove (28) with the same diameter as the steel ball (17). The steel ball (17) fits tightly against the inner wall of the groove (28) or the inner wall of the positioning core. The fixed cover (21) has a guide groove (211) on its outer side. The reset device (3) includes an elastic annular spring (34), the end of which is hinged to the inside of the positioning core. The annular spring (34) extends through the inside of the guide groove (211) in a ring shape, passing around the positioning point at the end of the annular spring (34). A flexible wire core (33) is fitted on the outside of the extension section of the annular spring (34). The displacement of the wire core (33) can cause the annular spring (34) to stretch and contract around the outside of all the steel balls and the positioning point at the end of the annular spring (34), changing the inner diameter of the annular spring (34).

2. The multi-way valve rotating bucket positioning device according to claim 1, characterized in that: The valve body (11) has an oil port (12) connected to the control pipeline on its outside. The valve stem (14) is slidably assembled inside the valve body (11). The axial displacement of the valve stem (14) can drive the valve block outside the valve stem (14) to change the hydraulic oil flow and flow ratio between the oil ports (12).

3. The multi-way valve rotating bucket positioning device according to claim 1, characterized in that: The valve body (11) has a through mounting hole (13) at the top, and the valve body (11) is equipped with a valve core (15) for reversing, throttling, pressure regulation, check valve and flow diversion.

4. The multi-way valve rotating bucket positioning device according to claim 1, characterized in that: A set of the positioning core includes a positioning kit one (22), a positioning kit three (24) and several positioning kit two (23). The positioning kit one (22), positioning kit two (23) and positioning kit three (24) are connected in sequence, and a spacer (25) is fitted tightly at the installation gap. A connecting rod (26) is installed through the center of the positioning kit one (22), positioning kit two (23), positioning kit three (24) and spacer (25). Nuts (27) are screwed to both ends of the connecting rod (26), and the nuts (27) are tightly fitted and fixed to the outer wall of the positioning kit one (22) and positioning kit three (24).

5. A multi-way valve rotating bucket positioning device according to claim 4, characterized in that: The slot (28) is circularly formed on the inner edges of positioning kit one (22) and positioning kit three (24) and on both inner edges of positioning kit two (23).

6. A multi-way valve rotating bucket positioning device according to claim 4, characterized in that: The outer side of the slot (28) of the positioning kit 1 (22), positioning kit 2 (23) and positioning kit 3 (24) and the inner side of the mounting position of the connecting rod (26) are all provided with spring plate positioning holes (29), and spring plate positioning pins (210) are fixedly installed inside the spring plate positioning holes (29).

7. A multi-way valve rotating bucket positioning device according to claim 4, characterized in that: The outer sleeve (32) is fitted around the core (33). Annular plates are positioned at both ends of the outer sleeve (32). A fixing frame (31) is fitted on the bottom outer wall of the guide groove (211). The outer sleeve (32) and the fixing frame (31) are fixedly installed together.

8. A multi-way valve rotating bucket positioning device according to claim 7, characterized in that: The annular spring (34) includes a socket piece (341) fixed between the core (33) and the spring piece (341). The end of the socket piece (341) is integrally cut with claw pieces (342) with the same number of gaps between the positioning kit one (22), several positioning kit two (23) and positioning kit three (24). The end of the claw piece (342) away from the socket piece (341) is bent into a spring head (343). The center of the spring head (343) has a round hole, and the round hole is sleeved and positioned with the outside of the spring positioning pin (210).

9. A multi-way valve rotating bucket positioning device according to claim 8, characterized in that: The resetter (4) includes a fixing member (41), a slot (42) is provided on one side of the fixing member (41), the slot (42) is fixedly installed at the end of the outer tube (32), a flipping member (44) is rotatably installed inside the fixing member (41), a connector (35) is fixed at the end of the wire core (33), the connector (35) is hinged to one end of the flipping member (44), a pressing member (46) is slidably connected to the other end of the flipping member (44), the pressing member (46) slides linearly outside the fixing member (41), and a reset spring (47) is assembled between the pressing member (46) and the fixing member (41).

10. A multi-way valve rotating bucket positioning device according to claim 9, characterized in that: The outer wall of the fixing member (41) is provided with a sliding groove (43), the pressing member (46) is slidably assembled inside the sliding groove (43), the two sides of the flipping member (44) are provided with slots, the flipping member (44) and the connecting head (35) are slidably assembled with a connecting pin (48), and the other end of the pressing member (46) and the flipping member (44) are slidably assembled with a sliding shaft (45).

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