Quick release valve with buffering function
By designing a quick release valve with buffer function, the problems of slow down speed of loading motor arm and large shaking of the whole machine are solved, and the rapid downturn of the boom and the operation comfort are improved.
Patent Information
- Application Number
- CN202421483596.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-06-27
AI Technical Summary
The large-tonnage loading motor arm has slow down speed and low operating efficiency. Due to the large shaking of the whole machine, it brings discomfort to customers.
A quick release valve with buffering function is designed. Through the position change of the valve core and the design of the buffer throttle, the boom's large cavity can quickly drain oil and gradient buffer overflow, reducing the shaking of the whole machine.
It improves the boom drop speed, improves the working efficiency, reduces the shaking of the whole machine, and improves the operating comfort. It also has the advantages of simple structure, convenient assembly, reliable operation and long service life.
Smart Images
Figure CN222615706U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a control system for an engineering vehicle, in particular to a quick-release valve with a buffer function. Background Art
[0002] A loader is a kind of earthwork construction machinery widely used in construction projects such as highways, railways, buildings, hydropower, ports, and mines. It is mainly used to shovel and load bulk materials such as soil, sand, lime, and coal. It can also do light shoveling and digging of ore and hard soil. The loader has the advantages of fast operation speed, high efficiency, good maneuverability, and easy operation. As a heavy-duty engineering machinery, the loader's work mainly involves lifting and moving the bucket horizontally and lowering and laying the bucket horizontally. Specific steps: The bucket is collected from the shoveling position on the ground, the boom lifts the bucket to the highest position, the bucket is lowered to unload, the boom drops to the lowest position, and the bucket is automatically laid flat. After the loader fills the bucket, it retreats a distance. In the process of the loader retreating and lifting the bucket to the unloading height, the dump truck retreats to a position perpendicular to the loader. After the bucket is unloaded, the dump truck moves forward a distance, and the loader quickly lowers the bucket and moves forward to the material pile to continue the next operation.
[0003] At present, large-tonnage loaders at home and abroad do not have quick-release valves, and the boom descent is controlled by the working main valve spool. However, due to the limited structure of the working main valve and insufficient flow capacity, the loader boom descent time cannot meet user requirements, that is, there is still a problem of low operating efficiency. Moreover, due to the relatively complex structure of the working main valve (including the oil circuit structure) and the large number of parts, the boom is unreliable and cannot be adjusted if it is lowered too quickly, there are many restrictions, and the operating efficiency is not high. Moreover, as the tonnage of loaders continues to increase, general main valves cannot meet the demand at all. In order to increase the descent speed of the loader boom to improve operating efficiency, a boom quick-release valve is developed. Although the boom quick-release valve solves the problem of insufficient boom descent time, the increased descent speed and inherent inertia will inevitably lead to the shaking of the entire machine, which will cause discomfort to customers. Utility Model Content
[0004] In order to solve the problems of slow boom lowering speed, low operating efficiency and large shaking of existing loaders in the background technology, the utility model provides a quick release valve with a buffer function.
[0005] The technical solution of the utility model is: a quick release valve with a buffer function, comprising:
[0006] A valve body, wherein the valve body is provided with a containing cavity, an oil return port, a first oil port connected to the large cavity of the boom, and a second oil port connected to the small cavity of the boom;
[0007] A valve core is disposed in the accommodating chamber of the valve body and divides the accommodating chamber into a spring chamber and a control chamber; the valve core has a first position of being closed, a second position of being opened so that the first oil port is connected to the oil return port through the buffer throttling groove to return the oil, and a third position of being fully opened so that the first oil port, the second oil port and the oil return port are connected;
[0008] The first elastic member is arranged in the spring cavity. The first elastic member abuts against the valve core and has a first position that drives the valve core to close.
[0009] As a further improvement of the utility model, the buffer throttling groove includes a first throttling groove, and the first throttling groove includes two throttling notch grooves, and the two throttling notch grooves are both semicircular and interconnected.
[0010] As a further improvement of the utility model, the area of the throttling notch groove near the first oil port is smaller than the area of the throttling notch groove near the oil return port.
[0011] As a further improvement of the utility model, the buffer throttling groove includes a second throttling groove, and the second throttling groove is arranged in a semicircular shape.
[0012] As a further improvement of the utility model, the first throttling groove and the second throttling groove are circumferentially arranged on the outer surface of the valve core, and the first throttling groove and the second throttling groove are arranged at intervals.
[0013] As a further improvement of the utility model, it also includes a first end cover, the first end cover and the valve body cooperate with each other to form a spring cavity, the spring cavity is provided with a stopper sleeve and a sealing sleeve for separating the spring cavity and the first oil port, and the first end cover is abutted against the sealing sleeve through the stopper sleeve.
[0014] As a further improvement of the utility model, it further comprises a second end cover, wherein the second end cover cooperates with the valve body to form the control chamber;
[0015] The pilot oil port is arranged on the valve body. The pilot oil enters the control cavity through the pilot oil port and interacts with the elastic force of the first elastic member to control the action of the valve core.
[0016] As a further improvement of the utility model, an exhaust hole is provided on the outer surface of the valve body, and the exhaust hole is communicated with the spring cavity.
[0017] As a further improvement of the utility model, the valve core is provided with a first sealing surface and a second sealing surface, the second sealing surface is an inclined surface, and the first sealing surface is in contact with the inner wall of the valve body.
[0018] As a further improvement of the utility model, the valve core is arranged in the valve body, and the valve body is detachably connected to the main valve.
[0019] The beneficial effect of the utility model is that the quick release valve is provided to realize the rapid oil discharge of the large cavity of the boom, and the boom lowering speed can be increased during operation, thereby improving the working efficiency. At the same time, the position change of the valve core is increased, and the gradual buffer overflow is realized through the buffer throttling groove, which reduces the shaking of the whole machine when the boom is lowered, and improves the operating comfort. The utility model also has the advantages of simple structure, convenient assembly, reliable action, and long service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Attached Figure 1 It is a structural schematic diagram of an embodiment of the utility model.
[0021] Attached Figure 2 It is a schematic cross-sectional structural diagram of an embodiment of the utility model.
[0022] Attached Figure 3 It is a structural schematic diagram of the valve core of an embodiment of the utility model.
[0023] Attached Figure 4 It is a schematic diagram of the hydraulic principle of an embodiment of the utility model.
[0024] In the figure, 1, valve body; 11, accommodating chamber; 12, spring chamber; 13, control chamber; 14, exhaust hole; 2, valve core; 21, buffer throttling groove; 211, first throttling groove; 2111, throttling notch groove; 212, second throttling groove; 23, first sealing surface; 24, second sealing surface; 3, first elastic member; 4, first end cover; 5, stop sleeve; 6, sealing sleeve; 7, second end cover; A, first oil port; B, second oil port; T, oil return port; Pst, pilot oil port. DETAILED DESCRIPTION
[0025] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:
[0026] Depend on Figure 1 Combination Figure 2-4 As shown, a quick release valve with a buffer function comprises:
[0027] A valve body 1, wherein the valve body 1 is provided with an accommodating chamber 11, an oil return port T, a first oil port A connected to a large chamber of the boom, and a second oil port B connected to a small chamber of the boom;
[0028] The valve core 2 is arranged in the accommodating chamber 11 of the valve body 1 and divides the accommodating chamber 11 into a spring chamber 12 and a control chamber 13; the valve core 2 has a first position of closing, a second position of opening so that the first oil port A is connected to the oil return port through the buffer throttling groove 21 to return oil, and a third position of fully opening so that the first oil port A and the second oil port B are connected to the oil return port T;
[0029] The first elastic member 3 is arranged in the spring chamber 12. The first elastic member 3 abuts against the valve core 2 and has a first position that drives the valve core 2 to be closed. The beneficial effect of the utility model is that the quick release valve is provided to realize the rapid oil discharge of the large chamber of the boom, and the boom lowering speed can be increased during operation, thereby improving the working efficiency. At the same time, the position change of the valve core is increased, and a gradual buffer overflow is realized through the buffer throttling groove, which reduces the shaking of the whole machine when the boom is lowered, and improves the operating comfort. The utility model also has the advantages of simple structure, convenient assembly, reliable action, and long service life.
[0030] The quick release valve A is connected to the large chamber (rodless chamber) of the loader boom, B is connected to the small chamber (rod chamber) of the loader boom, and Pst is connected to the pilot oil. When the loader is operating, the boom is lifted first, and the large chamber of the boom is supplied with oil. At this time, the pilot pressure is low, the valve core cannot be switched, and A is closed. After the bucket is unloaded, the boom begins to descend, and the pilot handle is operated to increase the pilot pressure. The pilot oil enters the non-spring end of the valve core (control chamber). When the pilot pressure is greater than the spring opening pressure, the valve core is pushed to achieve reversal, A is connected to T, and the hydraulic oil returns to the oil tank through the valve core throttle groove. Since the valve core has a small opening in the front stroke, the gradual buffer overflow technology can be used to achieve micro-control, thereby realizing the buffer function and the boom descends; when the boom continues to descend and as the pilot pressure continues to increase, the valve core opening increases, the valve port flow increases, and the oil discharge speed is accelerated, so that the boom can be quickly lowered.
[0031] After the boom is raised, in order to prevent the boom from automatically sliding down and causing a safety accident, low leakage is required, that is, self-locking is required.
[0032] The buffer throttle groove 21 includes a first throttle groove 211, and the first throttle groove 211 includes two throttle notch grooves 2111, and the two throttle notch grooves 2111 are both semicircular and connected to each other. Specifically, the area of the throttle notch groove 2111 near the first oil port A is smaller than the area of the throttle notch groove 2111 near the oil return port T. When such a quick valve is placed downward, the whole machine can be prevented from shaking, the stability of the system during operation is improved, and the staff can operate more comfortably.
[0033] The buffer throttle groove 21 includes a second throttle groove 212, and the second throttle groove 212 is arranged in a semicircular shape. Specifically, the first throttle groove 211 and the second throttle groove 212 are circumferentially arranged on the outer surface of the valve core, and the first throttle groove 211 and the second throttle groove 212 are arranged at intervals. The gradual buffer overflow technology is used to perfectly match the working conditions, and the throttle groove structure is reasonable.
[0034] The utility model further includes a first end cover 4, the first end cover 4 and the valve body 1 cooperate with each other to form a spring chamber 12, the spring chamber 12 is provided with a stopper sleeve 5 and a sealing sleeve 6 for separating the spring chamber 12 and the first oil port A, the first end cover 4 abuts against the sealing sleeve 6 through the stopper sleeve 5. The utility model further includes a second end cover 7, the second end cover 7 and the valve body 1 cooperate with each other to form the control chamber 13;
[0035] The pilot oil port Pst is provided on the valve body 1. The pilot oil enters the control chamber 13 through the pilot oil port Pst and interacts with the elastic force of the first elastic member 3 to control the movement of the valve core 2. Such a structure optimizes the internal oil passage, achieves a large flow rate and ultra-low pressure loss, makes the system more energy-efficient, and greatly improves the operating efficiency. The setting of the sealing sleeve and the stopper sleeve prevents the pressure oil of the first oil port from entering the spring chamber, and at the same time guides the movement of the valve core.
[0036] The outer surface of the valve body 1 is provided with an exhaust hole 14, and the exhaust hole 14 is connected to the spring chamber 12. The setting of the exhaust hole has an impact on the back pressure, avoiding the gap between the opening pressure and the theoretical setting value, which affects the system working condition.
[0037] The valve core 2 is provided with a first sealing surface 23 and a second sealing surface 24, wherein the second sealing surface 24 is an inclined surface, and the first sealing surface 23 is fitted with the inner wall of the valve body 1. The first sealing surface is fitted with the inner wall of the valve body, and the second sealing surface and the valve body form an inclined seal, that is, the product is reliably sealed through double sealing, and self-locking is achieved when the boom rises. The middle position can achieve extremely low leakage requirements and avoid excessive settlement of the boom.
[0038] The valve core 2 is arranged in the valve body 1, and the valve body 1 is detachably connected to the main valve. This makes the product compact and easy to install. The valve body is integrally cast and compact in structure. The pilot oil is used to push the slide valve (valve core) to open and close, so as to achieve rapid lowering of the boom. The valve core in the utility model can be directly integrated into the working oil port of the large and small chambers of the main valve, or it can be arranged on the valve body, and the valve body and the main valve are detachably connected to form an independent external installation.
[0039] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0040] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise specified, "plurality" means two or more.
[0041] Technical personnel should note: Although the utility model has been described according to the above specific implementation methods, the utility model concept is not limited to this utility model. Any modification using the utility model concept will be included in the scope of protection of the utility model patent right.
Claims
1. A quick release valve with buffer function, characterized in that :include: A valve body (1), wherein the valve body (1) is provided with a containing chamber (11), an oil return port (T), a first oil port (A) connected to a large chamber of the boom, and a second oil port (B) connected to a small chamber of the boom; A valve core (2) is disposed in a receiving chamber (11) of a valve body (1) and divides the receiving chamber (11) into a spring chamber (12) and a control chamber (13); the valve core (2) has a first position of being closed, a second position of being opened so that the first oil port (A) is connected to the oil return port through the buffer throttling groove (21) for oil return, and a third position of being fully opened so that the first oil port (A), the second oil port (B) and the oil return port (T) are connected; The first elastic member (3) is arranged in the spring chamber (12); the first elastic member (3) abuts against the valve core (2) and has a first position for driving the valve core (2) to tend to close.
2. A quick release valve with a buffer function according to claim 1, characterized in that The buffer throttling groove (21) comprises a first throttling groove (211), and the first throttling groove (211) comprises two throttling notch grooves (2111), and the two throttling notch grooves (2111) are both semicircular and interconnected.
3. A quick release valve with buffer function according to claim 2, characterized in that in, The area of the throttling notch groove (2111) near the first oil port (A) is smaller than the area of the throttling notch groove (2111) near the oil return port (T).
4. A quick release valve with buffer function according to claim 2 or 3, characterized in that The buffer throttling groove (21) comprises a second throttling groove (212), and the second throttling groove (212) is arranged in a semicircular shape.
5. A quick release valve with buffer function according to claim 4, characterized in that The first throttling groove (211) and the second throttling groove (212) are circumferentially arranged on the outer surface of the valve core, and the first throttling groove (211) and the second throttling groove (212) are arranged at intervals.
6. A quick release valve with a buffer function according to claim 1, characterized in that The valve body (1) further comprises a first end cover (4), wherein the first end cover (4) and the valve body (1) cooperate with each other to form a spring chamber (12), wherein a retaining sleeve (5) and a sealing sleeve (6) for separating the spring chamber (12) and the first oil port (A) are provided in the spring chamber (12), and the first end cover (4) abuts against the sealing sleeve (6) via the retaining sleeve (5).
7. The quick release valve with buffer function according to claim 1, characterized in that It also comprises a second end cover (7), wherein the second end cover (7) cooperates with the valve body (1) to form the control chamber (13); A pilot oil port (Pst) is provided on the valve body (1), and the pilot oil enters the control chamber (13) through the pilot oil port (Pst) and interacts with the elastic force of the first elastic member (3) to control the movement of the valve core (2).
8. The quick release valve with buffer function according to claim 1, characterized in that An exhaust hole (14) is provided on the outer surface of the valve body (1), and the exhaust hole (14) is connected to the spring chamber (12).
9. The quick release valve with buffer function according to claim 1, characterized in that The valve core (2) is provided with a first sealing surface (23) and a second sealing surface (24); the second sealing surface (24) is an inclined surface; and the first sealing surface (23) is in contact with the inner wall of the valve body (1).
10. The quick release valve with buffer function according to claim 1, characterized in that The valve core (2) is arranged in the valve body (1), and the valve body (1) is detachably connected to the main valve.