Walking system flow control valve
By designing a flow control valve for the walking system and dynamically adjusting the hydraulic oil distribution, the problem of insufficient power caused by the load difference between the front and rear wheels of agricultural machinery was solved, and the ability to autonomously get out of trouble under complex working conditions was realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN ANJI HYDRAULIC TRANSMISSION EQUIPMENT CO LTD
- Filing Date
- 2025-07-30
- Publication Date
- 2026-07-31
AI Technical Summary
In agricultural machinery, the difference in load between the front and rear wheels causes hydraulic oil to accumulate on the rear wheel with the smaller load, leading to rear wheel slippage, insufficient power to the front wheels, and the inability to get out of trouble on its own.
Design a flow control valve for a walking system. Through a combination of a Y-shaped tube, mounting cylinder, sliding tube, compression spring, and push ring, dynamically adjust the hydraulic oil distribution to ensure balanced oil supply to the front and rear hydraulic motors.
Under load variations, the hydraulic oil distribution is dynamically adjusted to ensure that the front hydraulic motor continuously receives sufficient power, helping agricultural machinery to get out of trouble smoothly under complex working conditions.
Smart Images
Figure CN224579565U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a flow control valve for a walking system. Background Technology
[0002] In agricultural production, harvesters and other agricultural machinery often use hydraulic motors as their core power source. A hydraulic motor is an actuator in a hydraulic system that converts the pressure energy of the liquid provided by a hydraulic pump into the mechanical energy (torque and speed) of its output shaft. Liquid is the medium for transmitting force and motion.
[0003] Some agricultural machinery uses hydraulic motors connected in parallel. While this configuration meets power distribution needs under normal operating conditions, when the front wheels get stuck in mud, the load on the front wheels increases dramatically due to the deep mud, while the rear wheels, not stuck, bear a relatively smaller load. Due to the hydraulic system's characteristic of "pressure flowing to the area of least resistance," hydraulic oil naturally concentrates in the rear wheel motors, which bear a smaller load. This directly causes the rear wheel motors to rotate abnormally, leading to rear wheel slippage. Simultaneously, the front wheel motors, receiving insufficient hydraulic oil, cannot generate enough force to pull the front wheels out of the mud. Ultimately, the agricultural machinery becomes trapped, unable to effectively exert force on either the front or rear wheels, and struggles to extricate itself from the mud. Utility Model Content
[0004] To solve the above problems, this utility model provides a flow control valve for a walking system.
[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a flow control valve for a walking system, including a Y-shaped tube, wherein an annular groove is formed on the inner wall of one section of the Y-shaped tube, and an installation cylinder with one end open is arranged in the annular groove. The outer diameter of the installation cylinder is smaller than the diameter of the annular groove. A sliding tube is slidably arranged in the installation cylinder. An installation ring is arranged at the end of the sliding tube away from the bottom of the cylinder. A compression spring is arranged in the sliding tube between the installation ring and the bottom of the installation cylinder. A connecting tube is arranged on the side of the installation ring away from the sliding tube. A plurality of first through holes are circumferentially spaced in the connecting tube. A second through hole is circumferentially opened on the outer wall of the installation cylinder corresponding to the connecting tube. A pushing ring is arranged at the end of the connecting tube away from the installation ring. The inner diameter of the pushing ring is smaller than the inner diameter of the Y-shaped tube.
[0006] By adopting the above technical solution, a Y-shaped tube, an annular groove, a mounting cylinder, a sliding tube, a compression spring, and a push ring are installed. The end of the Y-shaped tube with the annular groove is connected to the oil supply pipe of the rear hydraulic motor, the other end is connected to the output oil pipe of the hydraulic pump, and the remaining end is connected to the oil supply pipe of the front hydraulic motor, forming a passage for hydraulic oil to flow from the pump body to the front and rear motors. Under normal operating conditions, when the hydraulic oil flows along the pipeline, it will pass through the first through hole and the second through hole on the connecting pipe in sequence, and then flow smoothly through the annular space between the mounting cylinder and the groove wall. When the load on the front hydraulic motor suddenly increases due to mud or other reasons, the hydraulic oil will instinctively tend to flow to the oil supply pipe of the rear hydraulic motor with a smaller load. At this time, the flow rate of hydraulic oil flowing to the rear increases, and the thrust generated also increases. When this thrust exceeds the elastic force of the compression spring, it will push the push ring to move into the mounting cylinder, causing the compression spring to be compressed. As the push ring moves, it gradually blocks the second through hole on the mounting cylinder, thereby limiting the flow of hydraulic oil to the rear hydraulic motor's oil supply pipe. This dynamic adjustment process ensures sufficient hydraulic oil flow to the end connected to the front hydraulic motor's oil supply pipe, continuously providing enough power to the front hydraulic motor. This effectively avoids insufficient power in the front motor due to load differences, helping agricultural machinery to get out of trouble smoothly under complex working conditions.
[0007] Furthermore, the outer diameter of the connecting pipe is smaller than the outer diameter of the sliding pipe, the outer diameter of the pushing ring is the same as the inner diameter of the mounting cylinder, and the pushing ring is slidably connected to the mounting cylinder.
[0008] By adopting the above technical solution, the push ring is guaranteed to slide stably inside the mounting cylinder, ensuring the accuracy of blocking the second through hole.
[0009] Furthermore, the number of the first through holes is the same as the number of the second through holes, and the first through holes and the second through holes are arranged alternately.
[0010] By adopting the above technical solution, the number of first through holes and second through holes are the same and they are arranged in an alternating manner. After the hydraulic oil flows into the space between the connecting pipe and the mounting cylinder from the first through hole, it cannot flow out directly and smoothly from the second through hole. Instead, it needs to be turned or the flow path adjusted to a certain extent in this space before it can pass through the second through hole, which increases the resistance to the flow of hydraulic oil.
[0011] Furthermore, an annular fixing groove is formed on the inner wall of one section of the Y-shaped tube. The annular fixing groove is connected to the annular groove. The mounting cylinder is fixedly connected to the annular fixing groove. The inner diameter of the mounting cylinder is larger than the inner diameter of the Y-shaped tube, and the outer diameter of the pushing ring is larger than the inner diameter of the Y-shaped tube.
[0012] By adopting the above technical solution, an annular fixing groove is set, and the pushing ring contacts the groove wall of the annular fixing groove under the push of the compression spring, thereby limiting the position of the pushing ring and ensuring that the pushing ring is in a suitable initial position under normal working conditions. This ensures the stability of the relative positional relationship between the first through hole and the second through hole, and provides a reliable guarantee for the normal flow of hydraulic oil.
[0013] Furthermore, an annular plug is provided inside the Y-shaped tube, and two contact blocks are symmetrically arranged on the side of the annular plug near the mounting cylinder, with the contact blocks abutting against the bottom of the mounting cylinder.
[0014] By adopting the above technical solution, an annular plug and contact block are installed. These components ensure the stability of the mounting cylinder's position, preventing it from shifting under the impact of hydraulic oil flow or mechanical vibration. Furthermore, the contact block ensures that the annular plug and the bottom of the mounting cylinder are not completely sealed together; instead, the point support of the contact block provides sufficient flow space between them, guaranteeing smooth hydraulic oil flow.
[0015] Furthermore, the bottom of the mounting cylinder is provided with two base gaskets, three intermediate gaskets, and two contact gaskets in sequence from the cylinder opening to the bottom of the mounting cylinder. The outer diameter of the intermediate gaskets is smaller than the outer diameter of the contact gaskets.
[0016] Furthermore, a mounting pad is provided on the side of the mounting ring near the bottom of the mounting cylinder, and one end of the compression spring abuts against the mounting pad and the other end abuts against a contact pad away from the bottom of the mounting cylinder.
[0017] In summary, this utility model has the following beneficial effects: In this application, a Y-shaped tube, an annular groove, a mounting cylinder, a sliding tube, a compression spring, and a pushing ring are provided. The end of the Y-shaped tube with the annular groove is connected to the oil supply pipe of the rear hydraulic motor, the other end is connected to the output oil pipe of the hydraulic pump, and the remaining end is connected to the oil supply pipe of the front hydraulic motor, forming a passage for hydraulic oil to flow from the pump body to the front and rear motors. Under normal operating conditions, when the hydraulic oil flows along the pipeline, it passes through the first and second through holes on the connecting pipe in sequence, and then flows smoothly through the annular space between the mounting cylinder and the wall of the annular groove. When the load on the front hydraulic motor suddenly increases due to factors such as being stuck in mud, the hydraulic oil will instinctively tend to flow towards the oil supply pipe of the rear hydraulic motor with a smaller load. At this time, the flow rate of hydraulic oil flowing to the rear increases, and the thrust generated also increases. When this thrust exceeds the elastic force of the compression spring, it will push the pushing ring into the mounting cylinder, causing the compression spring to be compressed. As the push ring moves, it gradually blocks the second through hole on the mounting cylinder, thereby limiting the flow of hydraulic oil to the rear hydraulic motor's oil supply pipe. This dynamic adjustment process ensures sufficient hydraulic oil flow to the end connected to the front hydraulic motor's oil supply pipe, continuously providing enough power to the front hydraulic motor. This effectively avoids insufficient power in the front motor due to load differences, helping agricultural machinery to get out of trouble smoothly under complex working conditions. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;
[0019] Figure 2 yes Figure 1 A sectional view;
[0020] Figure 3 yes Figure 2 Enlarged view of part A;
[0021] Figure 4 yes Figure 3 Enlarged view of part B;
[0022] Figure 5 This is a schematic diagram of the structure of the mounting cylinder and the annular plug in an embodiment of this utility model;
[0023] Figure 6 This is a schematic diagram of the internal structure of the mounting cylinder in an embodiment of this utility model.
[0024] In the diagram: 10. Y-shaped tube; 11. Annular groove; 12. Mounting cylinder; 13. Annular fixing groove; 20. Sliding tube; 21. Mounting ring; 22. Compression spring; 23. Connecting tube; 24. First through hole; 25. Second through hole; 26. Pushing ring; 30. Annular plug; 31. Contact block; 40. Base gasket; 41. Intermediate gasket; 42. Contact gasket; 43. Mounting gasket. Detailed Implementation
[0025] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0026] like Figure 1-6 As shown in the figure, this application discloses a flow control valve for a walking system, including a Y-shaped tube 10, an annular groove 11, a mounting cylinder 12, a sliding tube 20, a compression spring 22, and a push ring 26. The annular groove 11 is formed on the inner wall of one section of the Y-shaped tube 10. The end of the Y-shaped tube 10 with the annular groove 11 is connected to the oil supply pipe of the rear hydraulic motor, the other end is connected to the output oil pipe of the hydraulic pump, and the remaining end is connected to the oil supply pipe of the front hydraulic motor, forming a passage for hydraulic oil to flow from the pump body to the front and rear motors.
[0027] Specifically, the mounting cylinder 12 is disposed within the annular groove 11 with one end open, the opening facing away from the end of the Y-shaped tube 10. The outer diameter of the mounting cylinder 12 is smaller than the diameter of the annular groove 11, creating an annular space between the mounting cylinder 12 and the annular groove 11. The sliding tube 20 is slidably disposed within the mounting cylinder 12. A mounting ring 21 is disposed at the end of the sliding tube 20 away from the bottom of the cylinder. A connecting tube 23 is disposed on the side of the mounting ring 21 away from the sliding tube 20. The connecting tube 23 has several first through holes 24 spaced apart circumferentially. A second through hole 25 is disposed on the outer wall of the mounting cylinder 12 corresponding to the circumferential of the connecting tube 23. A pushing ring 26 is disposed at the end of the connecting tube 23 away from the mounting ring 21. Under normal operating conditions, when hydraulic oil flows along the pipeline, it will pass through the first through holes 24 and the second through holes 25 on the connecting tube 23 in sequence, and then flow smoothly through the annular space between the mounting cylinder 12 and the wall of the annular groove 11. The compression spring 22 is located inside the sliding tube 20, between the mounting ring 21 and the bottom of the mounting cylinder 12. The inner diameter of the pushing ring 26 is smaller than the inner diameter of the Y-shaped tube 10. When the load on the front hydraulic motor suddenly increases due to mud or other reasons, the hydraulic oil will instinctively tend to flow towards the oil supply pipe of the rear hydraulic motor, which has a smaller load. At this time, the flow rate of hydraulic oil to the rear increases, and the thrust generated also increases. When this thrust exceeds the elastic force of the compression spring 22, it will push the pushing ring 26 into the mounting cylinder 12, causing the compression spring 22 to be compressed. As the pushing ring 26 moves, it gradually blocks the second through hole 25 on the mounting cylinder 12, thereby limiting the flow rate of hydraulic oil to the oil supply pipe of the rear hydraulic motor. This dynamic adjustment process ensures that there is sufficient hydraulic oil flowing to the end connected to the oil supply pipe of the front hydraulic motor, providing sufficient power to the front hydraulic motor continuously, effectively avoiding the problem of insufficient power of the front motor due to load differences, and helping agricultural machinery to get out of trouble smoothly in complex working conditions.
[0028] During setup, the outer diameter of the connecting pipe 23 is smaller than the outer diameter of the sliding pipe 20, and the outer diameter of the pushing ring 26 is the same as the inner diameter of the mounting cylinder 12. The pushing ring 26 is slidably connected to the mounting cylinder 12. This ensures that the pushing ring 26 slides stably within the mounting cylinder 12, guaranteeing the accuracy of blocking the second through hole 25. The number of first through holes 24 is the same as the number of second through holes 25, and the first through holes 24 and second through holes 25 are arranged alternately. After hydraulic oil flows into the space between the connecting pipe 23 and the mounting cylinder 12 from the first through hole 24, it cannot flow directly and smoothly out of the second through hole 25. Instead, it needs to undergo a certain degree of deflection or flow path adjustment within this space to pass through the second through hole 25, increasing the resistance to hydraulic oil flow.
[0029] In the specific configuration, an annular fixing groove 13 is formed on the inner wall of one section of the Y-shaped tube 10. The annular fixing groove 13 is connected to the annular groove 11. The mounting cylinder 12 is fixedly connected to the annular fixing groove 13. The inner diameter of the mounting cylinder 12 is larger than the inner diameter of the Y-shaped tube 10, and the outer diameter of the pushing ring 26 is larger than the inner diameter of the Y-shaped tube 10. Under the push of the compression spring 22, the pushing ring 26 contacts the groove wall of the annular fixing groove 13, thereby limiting the position of the pushing ring 26. This ensures that the pushing ring 26 is in a suitable initial position under normal working conditions, ensuring the stability of the relative positional relationship between the first through hole 24 and the second through hole 25, and providing a reliable guarantee for the normal flow of hydraulic oil. An annular plug 30 is provided inside the Y-shaped tube 10. Two contact blocks 31 are symmetrically arranged on the side of the annular plug 30 near the mounting cylinder 12. The contact blocks 31 abut against the bottom of the mounting cylinder 12. The annular plug 30 and the contact blocks 31 can ensure the stability of the position of the mounting cylinder 12 and prevent it from shaking under the impact of hydraulic oil flow or mechanical vibration. Furthermore, the contact block 31 ensures that the annular plug 30 and the bottom of the mounting cylinder 12 are not completely sealed together. Instead, the contact block 31 provides point support, leaving sufficient flow space between the annular plug 30 and the bottom of the mounting cylinder 12. This ensures smooth flow of hydraulic oil.
[0030] Two base gaskets 40, three intermediate gaskets 41, and two contact gaskets 42 are sequentially arranged at the bottom of the mounting cylinder 12 towards its opening. The outer diameter of the intermediate gaskets 41 is smaller than that of the contact gaskets 42. A mounting gasket 43 is provided on the side of the mounting ring 21 near the bottom of the mounting cylinder 12. One end of the compression spring 22 abuts against the mounting gasket 43, and the other end abuts against the contact gasket 42 away from the bottom of the mounting cylinder 12. The base gaskets 40, intermediate gaskets 41, contact gaskets 42, and mounting gaskets 43 provide support for the compression spring 22 and reduce direct friction between components, thus extending its service life.
[0031] In this embodiment, the operating principle of the flow control valve of the walking system is as follows: Hydraulic oil output from the hydraulic pump flows into the end of the hydraulic pump connected to the Y-shaped pipe 10, and then is divided. Part of the hydraulic oil passes sequentially through the first through hole 24 on the connecting pipe 23, the second through hole 25 on the mounting cylinder 12, and then through the annular space between the mounting cylinder 12 and the wall of the annular groove 11, flowing to the end of the Y-shaped pipe 10 connected to the rear hydraulic motor; the other part flows directly to the end of the Y-shaped pipe 10 connected to the front hydraulic motor, achieving balanced oil supply to the front and rear hydraulic motors. At this time, the push ring 26 contacts the wall of the annular fixed groove 13 under the action of the compression spring 22, and is in the initial limit position. When the load on the front hydraulic motor increases sharply, the hydraulic oil tends to flow to the rear hydraulic motor with a smaller load, resulting in an increase in the flow rate of hydraulic oil to the rear, and the thrust on the push ring 26 exceeds the force of the compression spring 22. Under the action of thrust, the push ring 26 moves into the mounting cylinder 12, compressing the compression spring 22. At the same time, the push ring 26 gradually blocks the second through hole 25 on the mounting cylinder 12, reducing the flow of hydraulic oil to the rear hydraulic motor. When the external load returns to normal, the thrust of the hydraulic oil flowing to the rear decreases, the compression spring 22 rebounds, pushing the push ring 26 back to its initial position in contact with the wall of the annular fixed groove 13. The second through hole 25 is fully opened, and the device returns to normal oil supply.
[0032] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.
Claims
1. A walking system flow control valve characterized by: The device includes a Y-shaped tube (10), one section of which has an annular groove (11) on its inner wall. An installation cylinder (12) with one open end is disposed within the annular groove (11). The outer diameter of the installation cylinder (12) is smaller than the diameter of the annular groove (11). A sliding tube (20) is slidably disposed within the installation cylinder (12). An installation ring (21) is disposed at the end of the sliding tube (20) away from the bottom of the cylinder. The sliding tube (20) is positioned between the installation ring (21) and the installation cylinder (12). A compression spring (22) is provided between the bottom of the cylinder and the mounting ring (21). A connecting pipe (23) is provided on the side of the mounting ring (21) away from the sliding tube (20). A plurality of first through holes (24) are provided circumferentially on the connecting pipe (23). A second through hole (25) is provided circumferentially on the outer wall of the mounting cylinder (12) corresponding to the connecting pipe (23). A push ring (26) is provided at the end of the connecting pipe (23) away from the mounting ring (21). The inner diameter of the push ring (26) is smaller than the inner diameter of the Y-shaped tube (10).
2. The walking system flow control valve of claim 1, wherein: The outer diameter of the connecting pipe (23) is smaller than the outer diameter of the sliding pipe (20), the outer diameter of the pushing ring (26) is the same as the inner diameter of the mounting cylinder (12), and the pushing ring (26) is slidably connected to the mounting cylinder (12).
3. The walking system flow control valve of claim 1, wherein: The number of the first through holes (24) is the same as the number of the second through holes (25), and the first through holes (24) and the second through holes (25) are arranged alternately.
4. The walking system flow control valve of claim 2, wherein: An annular fixing groove (13) is provided on the inner wall of one section of the Y-shaped pipe (10). The annular fixing groove (13) is connected to the annular groove (11). The mounting cylinder (12) is fixedly connected to the annular fixing groove (13). The inner diameter of the mounting cylinder (12) is larger than the inner diameter of the Y-shaped pipe (10). The outer diameter of the pushing ring (26) is larger than the inner diameter of the Y-shaped pipe (10).
5. The walking system flow control valve of claim 1, wherein: The Y-shaped tube (10) is provided with an annular plug (30). Two contact blocks (31) are symmetrically arranged on the side of the annular plug (30) near the mounting cylinder (12). The contact blocks (31) abut against the bottom of the mounting cylinder (12).
6. The walking system flow control valve of claim 1, wherein: The bottom of the mounting cylinder (12) is provided with two base gaskets (40), three intermediate gaskets (41), and two contact gaskets (42) in sequence from the cylinder opening to the cylinder bottom. The outer diameter of the intermediate gaskets (41) is smaller than the outer diameter of the contact gaskets (42).
7. The walking system flow control valve of claim 6, wherein: The mounting ring (21) is provided with a mounting pad (43) on the side of the bottom of the mounting cylinder (12) near the bottom of the mounting cylinder. One end of the compression spring (22) abuts against the mounting pad (43), and the other end abuts against the contact pad (42) away from the bottom of the mounting cylinder (12).