CN215483232U - Movable arm lifting limiting device of excavator - Google Patents
Movable arm lifting limiting device of excavator Download PDFInfo
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- CN215483232U CN215483232U CN202120709294.0U CN202120709294U CN215483232U CN 215483232 U CN215483232 U CN 215483232U CN 202120709294 U CN202120709294 U CN 202120709294U CN 215483232 U CN215483232 U CN 215483232U
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- movable arm
- excavator
- limiting
- electromagnetic valve
- pilot oil
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Abstract
The utility model discloses a movable arm lifting limiting device of an excavator, which comprises a limiting switch; the hydraulic control system also comprises a first pilot oil way, a second pilot oil way and a movable arm limiting electromagnetic valve; the limit switch is respectively electrically connected with the power supply and the movable arm limit electromagnetic valve; the tail end of the first pilot oil way is connected with an oil inlet of the movable arm limiting electromagnetic valve, and the starting end of the second pilot oil way is connected with an oil outlet of the movable arm limiting electromagnetic valve. When the movable arm of the excavator is lifted to a certain position, the movable arm lifting pilot oil way can be automatically cut off, so that the movable arm lifting action is not continued, and the purpose of movable arm lifting limiting is achieved.
Description
Technical Field
The utility model relates to the technical field of excavators, in particular to a movable arm lifting limiting device of an excavator.
Background
In various engineering constructions, an excavator is a common machine, and in many cases, due to the limitation of working conditions, the lifting amplitude of a movable arm of the excavator is too large, so that parts such as an oil cylinder and an arm collide with the surroundings, the excavator and surrounding people and objects are damaged, and even safety accidents are caused. The movable arm lifting limiting device of the excavator can limit the lifting position of the movable arm of the excavator by utilizing the matching of the electric oil circuit and the hydraulic oil circuit, so that the excavator is safer to construct in a narrow range.
Publication (bulletin) No.: CN105275030A, publication (public notice) day: 2016-01-27 discloses a crane boom jacking limiting device of an excavator, which is applied to an excavator, wherein the excavator comprises a platform, a crane boom and a shed, the shed is provided with a wall plate, the crane boom jacking limiting device comprises a chain rope, a guide structure, a sliding block and a limiting switch, one end of the chain rope is fixedly connected with the crane boom, the other end of the chain rope penetrates through the wall plate and is connected with the sliding block under the guidance of the guide structure, the guide structure and the limiting switch are fixedly arranged on the wall plate, and the limiting switch senses the vertical position of the sliding block so as to control and adjust the motion of the crane boom. Through chain rope, guide structure and slider, convert the upset action of jib loading boom into the vertical straight line action in the hangar, definite limit position that can be more accurate to can not take place to become invalid.
Publication (bulletin) No.: CN105586996A, publication (public notice) day: 2016-05-18 relates to a movable arm limit alarm system, and belongs to the field of mining equipment, and the movable arm limit alarm system comprises a first proximity switch fixed at a protruding position on the upper portion of a cab, an infrared transmitting device is arranged at a hinged position of a movable arm and a frame, the infrared transmitting direction of the infrared transmitting device is vertical to the upward direction of the frame, an infrared receiving device is arranged at the hinged position of the movable arm and a hopper, a second proximity switch is fixed on the upper portion of the movable arm, after the hopper is contacted with the second proximity switch, the included angle between connecting lines of the hinged position of the hopper and the hinged position of the frame is not more than 90 degrees, the first proximity switch, the second proximity switch and the infrared receiving device are all connected with an alarm through a control system, and the alarm can be given when the movable arm and the hopper threaten the safety of a driver, so that the safety of the driver is ensured.
The technical scheme, the technical problems to be solved and the beneficial effects of the prior art disclosed in the society are different from those of the utility model, or the technical field or the application occasion is different, and the technical documents disclosed in the above do not have technical inspiration aiming at more technical characteristics, the technical problems to be solved and the beneficial effects of the utility model.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a movable arm lifting limiting device of an excavator, aiming at the defects in the prior art, wherein when a movable arm of the excavator is lifted to a certain position, a movable arm lifting pilot oil way can be automatically cut off, so that the movable arm lifting action is not continued, and the purpose of limiting the movable arm lifting is achieved.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a movable arm lifting limiting device of an excavator comprises a limiting switch;
the hydraulic control system also comprises a first pilot oil way, a second pilot oil way and a movable arm limiting electromagnetic valve;
the limit switch is respectively electrically connected with the power supply and the movable arm limit electromagnetic valve;
the tail end of the first pilot oil way is connected with an oil inlet of the movable arm limiting electromagnetic valve, and the starting end of the second pilot oil way is connected with an oil outlet of the movable arm limiting electromagnetic valve.
Furthermore, the starting end of the first pilot oil path is connected with a boom lifting pilot valve in a self-contained hydraulic oil path of the excavator, and the tail end of the second pilot oil path is connected with a boom oil cylinder in the self-contained hydraulic oil path of the excavator.
Further, the device also comprises an intermediate relay;
the intermediate relay is electrically connected between the limit switch and the movable arm limit electromagnetic valve.
Further, the device also comprises an adjusting plate;
the adjusting plate is provided with a mounting hole and an adjusting strip hole;
the adjusting plate is fixed on the top of the cab through a mounting hole;
the limiting switch is provided with a fixing plate, the fixing plate is provided with a bolt, and the bolt is adjustably installed in an adjusting strip hole of the adjusting plate.
Furthermore, the limit switch is provided with a touch rod, and the touch rod extends to one side of the movable arm at the top of the cab.
Compared with the prior art, the utility model has the following beneficial effects:
when the movable arm is lifted to a certain position, the movable arm limit switch is triggered to act, the power supply of the coil of the intermediate relay is closed, the power supply of the coil of the movable arm lifting limit electromagnetic valve is closed by the action of the intermediate relay, the valve core of the electromagnetic valve acts, the movable arm lifting pilot oil way is disconnected, the movable arm lifting action is stopped, and the purpose of movable arm lifting limit is achieved.
After the device is adopted, when an excavator driver working in a narrow environment operates, the excavator driver does not need to pay attention to the lifting height of the movable arm by the wing at every time, the working efficiency of the excavator can be improved, the working pressure of the driver is reduced, and the accident occurrence probability is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a boom lifting and limiting device of an excavator;
fig. 2 is a limit switch installation diagram.
In the figure: the excavator is provided with a hydraulic oil circuit 100, a movable arm oil cylinder 101 and a movable arm lifting pilot valve 102;
the device comprises an adjusting plate 1, a switch fixing plate 2, a limit switch 3, a touch rod 4, a mounting hole 5 and an adjusting strip hole 6;
the hydraulic control system comprises a first pilot oil path 7, a second pilot oil path 8, a movable arm limiting electromagnetic valve 9, an intermediate relay 10, a fuse 11 and a power supply 12.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 2, the present invention provides a technical solution:
a movable arm lifting limiting device of an excavator comprises a limiting switch 3;
the hydraulic control system also comprises a first pilot oil path 7, a second pilot oil path 8 and a movable arm limiting electromagnetic valve 9;
the limit switch is respectively and electrically connected with the power supply 12 and the movable arm limit electromagnetic valve 9; a fuse 11 is connected between the limit switch and the power supply 12.
The tail end of the first pilot oil way is connected with an oil inlet of the movable arm limiting electromagnetic valve, and the starting end of the second pilot oil way is connected with an oil outlet of the movable arm limiting electromagnetic valve.
Further, the start end of the first pilot oil path is connected with a boom lifting pilot valve 102 in the self-contained hydraulic oil path of the excavator, and the end of the second pilot oil path is connected with a boom cylinder 101 in the self-contained hydraulic oil path of the excavator.
Further, an intermediate relay 10 is also included;
the intermediate relay is electrically connected between the limit switch and the movable arm limit electromagnetic valve.
Further, the device also comprises an adjusting plate 1;
the adjusting plate is provided with a mounting hole 5 and an adjusting strip hole 6;
the adjusting plate is fixed on the top of the cab through a mounting hole;
the limit switch is provided with a fixing plate 2, the fixing plate is provided with a bolt, and the bolt is adjustably installed in an adjusting strip hole of the adjusting plate.
Furthermore, the limit switch is provided with a touch rod 4, and the touch rod extends to one side of the movable arm at the top of the cab. Limit switch and the last touch stick of limit switch are prior art, and direct purchase can.
1. The device is arranged on an excavator, a movable arm lifting pilot oil way needs to be disconnected according to the requirement of the principle of the attached figure 1, and two pilot oil pipes led out from an electromagnetic valve are connected in series, so that the purpose of controlling the pilot oil way by the electromagnetic valve is achieved.
2. The movable arm limit switch needs to be fixed on the excavator, and the epoxy resin touch rod 4 of the limit switch can be touched in the process of lifting the movable arm of the excavator. As shown in fig. 2: a limit switch fixing plate 2 is designed, a limit switch 3 is fixed on the limit switch fixing plate 2, and the fixed position of the limit switch fixing plate can be changed in a long groove of an adjusting plate 1, so that the lifting and limiting positions of a movable arm can be adjusted according to working requirements. Two ends of the adjusting plate 1 are provided with elongated slot type mounting holes 5 for fixing on the top of the cab.
3. The installation positions of a power supply, an electromagnetic valve, an oil pipe, a circuit, an intermediate relay, a fuse and the like on the excavator are selected according to the conditions of machine types, space and the like.
All parts and parts which are not discussed in the present application and the connection mode of all parts and parts in the present application belong to the known technology in the technical field, and are not described again.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A movable arm lifting limiting device of an excavator comprises a limiting switch;
the hydraulic control system is characterized by further comprising a first pilot oil way, a second pilot oil way and a movable arm limiting electromagnetic valve;
the limit switch is respectively electrically connected with the power supply and the movable arm limit electromagnetic valve;
the tail end of the first pilot oil way is connected with an oil inlet of the movable arm limiting electromagnetic valve, and the starting end of the second pilot oil way is connected with an oil outlet of the movable arm limiting electromagnetic valve.
2. The boom lifting and limiting device for the excavator as claimed in claim 1, wherein the first pilot oil path starting end is connected with a boom lifting pilot valve in a self-contained hydraulic oil path of the excavator, and the second pilot oil path tail end is connected with a boom cylinder in the self-contained hydraulic oil path of the excavator.
3. The excavator boom lifting limiting device as claimed in claim 1 or 2, further comprising an intermediate relay;
the intermediate relay is electrically connected between the limit switch and the movable arm limit electromagnetic valve.
4. The excavator boom lifting and limiting device as claimed in claim 3, further comprising an adjusting plate;
the adjusting plate is provided with a mounting hole and an adjusting strip hole;
the adjusting plate is fixed on the top of the cab through a mounting hole;
the limiting switch is provided with a fixing plate, the fixing plate is provided with a bolt, and the bolt is adjustably installed in an adjusting strip hole of the adjusting plate.
5. The boom lifting limiting device for the excavator as claimed in claim 4, wherein the limiting switch is provided with a touch rod, and the touch rod extends to one side of the boom at the top of the cab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120709294.0U CN215483232U (en) | 2021-04-08 | 2021-04-08 | Movable arm lifting limiting device of excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120709294.0U CN215483232U (en) | 2021-04-08 | 2021-04-08 | Movable arm lifting limiting device of excavator |
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| Publication Number | Publication Date |
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| CN215483232U true CN215483232U (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120709294.0U Active CN215483232U (en) | 2021-04-08 | 2021-04-08 | Movable arm lifting limiting device of excavator |
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| CN (1) | CN215483232U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809179A (en) * | 2022-06-06 | 2022-07-29 | 力士德工程机械股份有限公司 | Excavator movable arm limiting device and excavator with same |
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2021
- 2021-04-08 CN CN202120709294.0U patent/CN215483232U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809179A (en) * | 2022-06-06 | 2022-07-29 | 力士德工程机械股份有限公司 | Excavator movable arm limiting device and excavator with same |
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