Hydraulic delay eliminating system of bucket lifting mechanism
By using pressure relief valves and low expansion rate oil pipes in engineering machinery, combined with O-type functional solenoid valves and throttle orifices, the problem of delayed bucket lifting action was solved, achieving pressure balance and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-03-31
AI Technical Summary
In construction machinery, long hydraulic lines cause delays in bucket lifting and lowering. Existing technology lacks effective pressure limiting devices, resulting in high pressure and severe delays in bucket lifting and lowering.
By employing a pressure-limiting valve and a low-expansion-rate oil pipe, combined with an O-type functional solenoid valve and a throttle orifice, the pressure of bucket lifting and lowering is limited, and pressure balance is achieved through a low-expansion-rate pipeline, simplifying the structure and reducing costs.
It effectively solved the problem of delayed bucket lifting action, reduced bucket lifting pressure, simplified the structure and reduced costs.
Smart Images
Figure CN224064629U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a bucket lifting mechanism hydraulic delay elimination system. BACKGROUND
[0002] Some valve groups in engineering machinery are not suitable for using Y type function and need to use O type function, when the hydraulic pipeline is very long, after the operation handle is loosened, the bucket lifting action will not stop and will move a long distance due to the action of residual pressure oil in the pipeline.
[0003] In the prior art, the bucket lifting / lowering is limited by the throttle hole to limit the speed of the action, because the action does not increase a separate pressure limiting device, the increase of the throttle hole makes the bucket lifting / lowering action pressure reach the system set pressure, and the pressure is relatively high. Taking the bucket lifting as an example, the bucket lifting oil way pressure is very high when the bucket lifting is performed, and the pipeline expansion is relatively large, at this time, the bucket lowering oil way pressure is relatively low. After the electromagnetic valve returns to the middle position when the operation handle is loosened, the pipeline is sealed. At this time, the pressure in the bucket lifting oil way needs to be released to drive the bucket to continue to move upward to balance the pressure of the bucket lifting oil way and the bucket lowering oil way. When the bucket lowering is performed, the principle is the same, and the bucket will continue to move downward after the handle is loosened. UTILITY MODEL CONTENTS
[0004] The utility model aims at overcoming the above-mentioned deficiencies in the prior art, and provides a bucket lifting mechanism hydraulic delay elimination system with a reasonable structure design.
[0005] The utility model adopts the technical scheme that the bucket lifting mechanism hydraulic delay elimination system comprises an electromagnetic valve, a large-cavity pressure limiting valve, a bucket lifting oil way, a bucket lowering oil way, a small-cavity pressure limiting valve and a lifting oil cylinder, the lifting oil cylinder is internally provided with a lifting oil cylinder large cavity and a lifting oil cylinder small cavity, and the structure is characterized in that: the system further comprises a throttle hole and a hydraulic control check valve, two ends of the bucket lifting oil way are connected with the electromagnetic valve and the lifting oil cylinder large cavity respectively, two ends of the bucket lowering oil way are connected with the electromagnetic valve and the lifting oil cylinder small cavity respectively, and the bucket lowering oil way is connected with the hydraulic control check valve, the large-cavity pressure limiting valve, the throttle hole and the hydraulic control check valve are arranged on the bucket lifting oil way, and the small-cavity pressure limiting valve is arranged on the bucket lowering oil way.
[0006] Further, a first electromagnet and a second electromagnet are arranged on the electromagnetic valve.
[0007] Further, the bucket lifting oil way and the bucket lowering oil way are processed by using low-expansion-rate oil pipe materials.
[0008] Further, the electromagnetic valve is an O type function electromagnetic valve.
[0009] Compared with the prior art, the bucket lifting mechanism hydraulic delay elimination system has the following advantages: the bucket lifting / lowering pressure is limited by increasing the pressure limiting valve, so that the bucket lifting / lowering pressure is relatively low, and in addition, the pipeline with small expansion rate is used, so that when the bucket lifting / lowering action is performed, the bucket lifting oil way / bucket lowering oil way pipe is slightly expanded, and the expansion pressure is released when the bucket moves a small distance, and the pressure balance of the two oil ways is achieved. BRIEF DESCRIPTION OF DRAWINGS
[0010] Figure 1 is a principle schematic diagram of the bucket lifting mechanism hydraulic delay elimination system of the utility model embodiment.
[0011] In the figure: a solenoid 1, a solenoid valve 2, a large cavity pressure limiting valve 3, a bucket lifting oil way 4, a throttle hole 5, a hydraulic control check valve 6, a lifting oil cylinder large cavity 7, a lifting oil cylinder small cavity 8, a bucket lowering oil way 9, a small cavity pressure limiting valve 10, a second solenoid 11. DETAILED DESCRIPTION
[0012] The utility model will be further explained in detail in combination with the drawings and through the embodiment, and the following embodiment is the explanation of the utility model, and the utility model is not limited to the following embodiment.
[0013] EMBODIMENT
[0014] Referring to Figure 1 It is understood that the structure, proportion, size and the like shown in the drawings attached to the specification are only used to cooperate with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the limited conditions that the utility model can be implemented, so they do not have the substantial meaning of technology, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose that the utility model can produce, should still fall within the range that the technical content disclosed by the utility model can cover. At the same time, the terms such as "upper", "lower", "left", "right", "intermediate" and "one" in the specification are only for the convenience of clear description, and are not used to limit the range that the utility model can be implemented, the change or adjustment of relative relationship, without substantially changing the technical content, is also regarded as the scope that the utility model can be implemented.
[0015] The bucket lifting mechanism hydraulic delay elimination system in the embodiment comprises a solenoid valve 2, a large cavity pressure limiting valve 3, a bucket lifting oil way 4, a throttle hole 5, a hydraulic control check valve 6, a bucket lowering oil way 9, a small cavity pressure limiting valve 10 and a lifting oil cylinder, the lifting oil cylinder is provided with a lifting oil cylinder large cavity 7 and a lifting oil cylinder small cavity 8, and a solenoid valve 2 is provided with a solenoid 1 and a second solenoid 11.
[0016] The two ends of the bucket lifting oil path 4 in the embodiment are connected with the electromagnetic valve 2 and the lifting oil cylinder large cavity 7 respectively, the two ends of the bucket lowering oil path 9 are connected with the electromagnetic valve 2 and the lifting oil cylinder small cavity 8 respectively, and the bucket lowering oil path 9 is connected with the hydraulic control check valve 6, the large cavity pressure limiting valve 3, the throttle hole 5 and the hydraulic control check valve 6 are all arranged on the bucket lifting oil path 4, the small cavity pressure limiting valve 10 is arranged on the bucket lowering oil path 9, the bucket lifting oil path 4 and the bucket lowering oil path 9 are processed by using oil pipe materials with very small expansion rate, and the electromagnetic valve 2 is an O-shaped function electromagnetic valve.
[0017] The set pressure of the large cavity pressure limiting valve 3 is slightly higher than the required pressure of the lifting oil cylinder large cavity 7, and the set pressure of the small cavity pressure limiting valve 10 is slightly higher than the required pressure of the lifting oil cylinder small cavity 8.
[0018] Specifically, when the bucket lifting action is performed, the No. 2 electromagnet 11 is electrified, the hydraulic oil enters the lifting oil cylinder large cavity 7 through the throttle hole 5 and the hydraulic control check valve 6 to drive the lifting oil cylinder to lift, at this time, the set pressure of the large cavity pressure limiting valve 3 is slightly higher than the required pressure of the bucket lifting, and the oil pipe used in the bucket lifting oil path 4 has a small expansion rate, so that the lifting speed is slow under the limitation of the throttle hole 5, and when the electromagnetic valve 2 returns to the middle position, the lifting oil cylinder can stop moving after a very small distance of micro-motion due to the pressure limitation of the large cavity pressure limiting valve 3 and the small expansion rate of the oil pipe used in the bucket lifting oil path 4.
[0019] When the bucket lowering action is performed, the No. 1 electromagnet 1 is electrified, the hydraulic oil enters the lifting oil cylinder small cavity 8, at this time, the hydraulic control check valve 6 is opened under the action of the hydraulic oil in the bucket lowering oil path 9, the hydraulic oil drives the lifting oil cylinder to lower, the set pressure of the small cavity pressure limiting valve 10 is slightly higher than the required pressure of the bucket lowering, and the oil pipe used in the bucket lowering oil path 9 has a small expansion rate, so that the lowering speed is slow under the limitation of the throttle hole 5, and when the electromagnetic valve 2 returns to the middle position, the lifting oil cylinder can stop moving after a very small distance of micro-motion due to the pressure limitation of the small cavity pressure limiting valve 10 and the small expansion rate of the oil pipe used in the bucket lowering oil path 9.
[0020] In addition, it should be noted that the specific embodiments described in the specification, the shape of the zero, the components, the name taken, etc. can be different, the above contents described in the specification are only exemplified for the structure of the utility model. Any equivalent change or simple change made according to the structure, features and principles described in the utility model patent concept is included in the protection scope of the utility model patent. The person skilled in the art of the utility model can make various modifications or supplements or adopt similar ways to replace the specific embodiments described, as long as it does not deviate from the structure of the utility model or exceed the range defined in the claims, which should belong to the protection scope of the utility model.
Claims
1. A bucket lifting mechanism hydraulic delay elimination system, comprising a solenoid valve (2), a large cavity pressure limiting valve (3), a bucket lifting oil path (4), a bucket lowering oil path (9), a small cavity pressure limiting valve (10) and a lifting cylinder, a lifting cylinder large cavity (7) and a lifting cylinder small cavity (8) are arranged in the lifting cylinder, characterized in that: It also includes a throttle hole (5) and a hydraulic control check valve (6), both ends of the bucket lifting oil path (4) are connected with the electromagnetic valve (2) and the lifting oil cylinder large cavity (7) respectively, both ends of the bucket lowering oil path (9) are connected with the electromagnetic valve (2) and the lifting oil cylinder small cavity (8) respectively, and the bucket lowering oil path (9) is connected with the hydraulic control check valve (6), the large cavity pressure limiting valve (3), the throttle hole (5) and the hydraulic control check valve (6) are all arranged on the bucket lifting oil path (4), and the small cavity pressure limiting valve (10) is arranged on the bucket lowering oil path (9).
2. The bucket hoist hydraulic delay cancellation system of claim 1, wherein: The electromagnetic valve (2) is provided with a first electromagnet (1) and a second electromagnet (11).
3. The bucket hoist hydraulic delay cancellation system of claim 1, wherein: The bucket lifting oil path (4) and the bucket lowering oil path (9) are processed by using oil pipe materials.
4. The bucket hoist hydraulic delay cancellation system of claim 1, wherein: The electromagnetic valve (2) is an O-shaped function electromagnetic valve.