CN219911380U - Hedge trimmer hydraulic motor protection system - Google Patents
Hedge trimmer hydraulic motor protection system Download PDFInfo
- Publication number
- CN219911380U CN219911380U CN202320648859.8U CN202320648859U CN219911380U CN 219911380 U CN219911380 U CN 219911380U CN 202320648859 U CN202320648859 U CN 202320648859U CN 219911380 U CN219911380 U CN 219911380U
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- oil
- hydraulic
- communicated
- pipeline
- hydraulic motor
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- 239000003921 oil Substances 0.000 claims abstract description 90
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 38
- 230000000694 effects Effects 0.000 abstract description 3
- 230000003139 buffering effect Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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Abstract
The utility model discloses a hydraulic motor protection system of a hedge trimmer, which relates to the field of hedge trimmers, and comprises a hydraulic oil tank, wherein hydraulic oil is arranged in the hydraulic oil tank and is provided with an oil outlet and an oil inlet, the oil outlet of the hydraulic oil tank is communicated with the oil inlet of a hydraulic pump, and the oil inlet of the hydraulic oil tank is communicated with a main oil return pipeline; an oil outlet of the hydraulic pump is connected with an oil inlet of the reversing valve through an oil supply pipeline; the oil outlet of the reversing valve is communicated with a first pipeline tee joint; the other two ports of the first pipeline tee joint are respectively communicated with the return pipeline and the oil inlet of the overflow valve, and the oil outlet of the overflow valve is connected with the oil inlet of the hydraulic motor. The utility model has the advantages that: 1. the hydraulic motor is prevented from being damaged by circulating and buffering the hydraulic oil in the closed loop, so that the service life of the motor is prolonged; 2. the hydraulic oil returns to the hydraulic oil tank through the overflow pipe from the overflow port of the overflow valve, so that the protection effect on the hydraulic motor and the hedge trimmer cutter head can be achieved.
Description
Technical Field
The utility model relates to the field of hedge trimmers, in particular to a hydraulic motor protection system of a hedge trimmer.
Background
The hydraulic motor of the hedge trimmer is an executive component of a hydraulic system, converts the hydraulic pressure provided by a hydraulic pump into the mechanical energy of an output shaft, drives a cutter head to rotate at a high speed, and achieves the aim of quick cutting.
When the oil supply pipeline of the motor is cut off, the high-speed rotating tool bit can drive the hydraulic motor to continuously rotate under the action of inertia to form a structure similar to a hydraulic pump, oil is continuously pumped from the oil supply pipeline, and as the closed pipeline is arranged between the hydraulic motor and the reversing valve, the oil supply pipeline can form a vacuum environment due to continuous oil pumping, so that the hydraulic motor is damaged, and the service life is shortened; when the hedge trimmer cutter head is blocked greatly in the high-speed rotation process, sudden deceleration or stalling can occur, and the oil supply pressure in the oil supply pipeline and the motor suddenly rises, so that the hydraulic motor is damaged.
Disclosure of Invention
The utility model aims to provide a hydraulic motor protection system of a hedge trimmer, which aims to solve the defects in the prior art.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the hydraulic oil tank is internally provided with hydraulic oil, an oil outlet and an oil inlet are arranged, the oil outlet of the hydraulic oil tank is communicated with the oil inlet of the hydraulic pump, and the oil inlet of the hydraulic oil tank is communicated with a main oil return pipeline; an oil outlet of the hydraulic pump is connected with an oil inlet of the reversing valve through an oil supply pipeline; the oil outlet of the reversing valve is communicated with a first pipeline tee joint; the other two ports of the first pipeline tee joint are respectively communicated with the return pipeline and the oil inlet of the overflow valve, the oil outlet of the overflow valve is connected with the oil inlet of the hydraulic motor, a hedge trimmer cutter head is arranged on the output shaft of the hydraulic motor, and the oil outlet of the hydraulic motor is communicated with the oil inlet of the first one-way valve; the oil outlet of the first one-way valve is communicated with the second pipeline tee joint, the oil outlet of the second pipeline tee joint is communicated with the main oil return pipeline and the oil inlet of the second one-way valve respectively, and the oil outlet of the second one-way valve is connected with the first pipeline tee joint through a return pipeline.
According to the hydraulic motor protection system of the hedge trimmer, the overflow port of the overflow valve is communicated with the hydraulic oil tank through the overflow pipe.
The utility model has the advantages that:
1. the hydraulic motor is prevented from being damaged by circulating and buffering the hydraulic oil in the closed loop, so that the service life of the motor is prolonged;
2. the hydraulic oil returns to the hydraulic oil tank through the overflow pipe from the overflow port of the overflow valve, so that the protection effect on the hydraulic motor and the hedge trimmer cutter head can be achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of a hedge trimmer hydraulic motor protection system.
Reference numerals: 1-hydraulic tank, 2-hydraulic pump, 3-switching-over valve, 4-overflow valve, 5-first check valve, 6-second check valve, 7-hydraulic motor, 8-oil supply pipeline, 9-main oil return pipeline, 10-return line, 11-first pipeline tee bend, 12-second pipeline tee bend, 13-overflow pipe.
Detailed Description
As shown in fig. 1, the hydraulic motor protection system of the hedge trimmer specifically disclosed in the embodiment comprises a hydraulic oil tank 1, wherein hydraulic oil is arranged in the hydraulic oil tank 1, an oil outlet and an oil inlet are arranged in the hydraulic oil tank 1, the oil outlet of the hydraulic oil tank 1 is communicated with the oil inlet of a hydraulic pump 2, and the oil inlet of the hydraulic oil tank 1 is communicated with a main oil return pipeline 9; an oil outlet of the hydraulic pump 2 is connected with an oil inlet of the reversing valve 3 through an oil supply pipeline 8; the oil outlet of the reversing valve 3 is communicated with a first pipeline tee joint 11; the other two ports of the first pipeline tee joint 11 are respectively communicated with the return pipeline 10 and the oil inlet of the overflow valve 4, the oil outlet of the overflow valve 4 is connected with the oil inlet of the hydraulic motor 7, a hedge trimmer cutter head is arranged on the output shaft of the hydraulic motor 7, and the oil outlet of the hydraulic motor 7 is communicated with the oil inlet of the first one-way valve 5; the oil outlet of the first one-way valve 5 is communicated with the second pipeline tee joint 12, and the oil outlet of the second pipeline tee joint 12 is communicated with the main oil return pipeline 9 and the oil inlet of the second one-way valve 6 respectively, so that the reverse flow of hydraulic oil is prevented, and the reverse rotation of the motor hydraulic motor 7 is prevented; the oil outlet of the second one-way valve 6 is connected with a first pipeline tee joint 11 through a return pipeline 10.
When the reversing valve 3 is switched to the oil supply position, hydraulic oil cannot enter the main oil return pipeline 9 through the return pipeline 10 due to the action of the second one-way valve 6, and can only enter the hydraulic motor 7 through the overflow valve 4 to drive the rotary cutter head to rotate;
when the hydraulic pump 2 suddenly stops supplying oil to the hydraulic motor 7, the output shaft of the hydraulic motor 7 continues to rotate under the inertia action of a cutter head rotating at a high speed, the hydraulic motor 7 continues to extract hydraulic oil from the oil supply pipeline 8, negative pressure is formed at the oil inlet end of the hydraulic motor 7, the hydraulic oil in the main oil return pipeline 9 passes through the first one-way valve 5, passes through the return pipeline 10 and then passes through the second one-way valve 6 to enter the first pipeline tee joint 11 and forms a closed circulation loop with the overflow valve 4, the hydraulic oil is circularly buffered in the closed circulation loop, the rotating speed of the hydraulic motor 7 gradually decreases to stop, and the damage of the hydraulic motor 7 caused by sudden oil supply stopping is prevented;
when the hedge trimmer cutter head rotates at a high speed and is blocked, the rotating speed is suddenly reduced or stopped, the rotating speed of the hydraulic motor 7 is suddenly reduced or stopped under the drive of the cutter head, the internal pressure of the oil supply pipeline 8 and the internal pressure of the hydraulic motor 7 are increased, and after the overflow pressure of the overflow valve 4 is reached, hydraulic oil returns to the hydraulic oil tank 1 from an overflow port of the overflow valve 4 through the overflow pipe 13, so that the protection effect on the hydraulic motor 7 and the hedge trimmer cutter head is achieved;
the overflow port of the overflow valve 4 is communicated with the hydraulic oil tank 1 through the overflow pipe 13, and redundant hydraulic oil in the overflow valve 4 flows back to the hydraulic oil tank 1 through the overflow port and the overflow pipe 13, so that the hydraulic oil tank can be reused, and energy sources are saved.
The foregoing description of the embodiments of the present utility model has been presented in conjunction with the following drawings, but is not to be construed as limiting the scope of the utility model, which is defined by the detailed description of the utility model.
Claims (2)
1. A hedge trimmer hydraulic motor protection system, characterized by: the hydraulic oil tank (1) is internally provided with hydraulic oil, an oil outlet and an oil inlet are arranged, the oil outlet of the hydraulic oil tank (1) is communicated with the oil inlet of the hydraulic pump (2), and the oil inlet of the hydraulic oil tank (1) is communicated with a main oil return pipeline (9); an oil outlet of the hydraulic pump (2) is connected with an oil inlet of the reversing valve (3) through an oil supply pipeline (8); an oil outlet of the reversing valve (3) is communicated with a first pipeline tee joint (11); the other two ports of the first pipeline tee joint (11) are respectively communicated with a return pipeline (10) and an oil inlet of the overflow valve (4), an oil outlet of the overflow valve (4) is connected with an oil inlet of the hydraulic motor (7), a hedge trimmer cutter head is arranged on an output shaft of the hydraulic motor (7), and an oil outlet of the hydraulic motor (7) is communicated with an oil inlet of the first one-way valve (5); the oil outlet of the first one-way valve (5) is communicated with a second pipeline tee joint (12), the oil outlet of the second pipeline tee joint (12) is communicated with the main oil return pipeline (9) and the oil inlet of the second one-way valve (6) respectively, and the oil outlet of the second one-way valve (6) is connected with the first pipeline tee joint (11) through a return pipeline (10).
2. A hedge trimmer hydraulic motor protection system according to claim 1 wherein: the overflow port of the overflow valve (4) is communicated with the hydraulic oil tank (1) through an overflow pipe (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320648859.8U CN219911380U (en) | 2023-03-29 | 2023-03-29 | Hedge trimmer hydraulic motor protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320648859.8U CN219911380U (en) | 2023-03-29 | 2023-03-29 | Hedge trimmer hydraulic motor protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219911380U true CN219911380U (en) | 2023-10-27 |
Family
ID=88441116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320648859.8U Active CN219911380U (en) | 2023-03-29 | 2023-03-29 | Hedge trimmer hydraulic motor protection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219911380U (en) |
-
2023
- 2023-03-29 CN CN202320648859.8U patent/CN219911380U/en active Active
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