CN211774091U - Excavator track beam telescopic mechanism assembly and excavator with same - Google Patents
Excavator track beam telescopic mechanism assembly and excavator with same Download PDFInfo
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- CN211774091U CN211774091U CN201922437482.8U CN201922437482U CN211774091U CN 211774091 U CN211774091 U CN 211774091U CN 201922437482 U CN201922437482 U CN 201922437482U CN 211774091 U CN211774091 U CN 211774091U
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- walking frame
- excavator
- track beam
- screw rod
- screw
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Abstract
The utility model relates to an excavator track beam telescopic mechanism assembly and an excavator with the same, which comprises a walking frame, track beams and oil cylinders, wherein the track beams are arranged at two sides of the walking frame, the walking frame is provided with guide holes with left and right directions, one side of the track beams facing the walking frame is provided with a telescopic crossbeam inserted into the guide holes, the track beams are connected with the oil cylinders for pushing the track beams to move left and right, the excavator track beam telescopic mechanism assembly also comprises a screw rod limiting component, the screw rod limiting component comprises a stop block connected at one side of the track beams facing the walking frame and a screw rod connected on the walking frame through the stop block, one end of the screw rod facing the track beams is provided with a head part of the stop block, the rod body of the screw rod is provided with a flexible connecting section for limiting, when the stop screw rod is subjected to abnormal bending stress and impact load, the flexible connecting section can better absorb impact and bear the radial force borne by the stop screw rod, thereby protecting the limit screw from breaking.
Description
Technical Field
The utility model relates to an engineering machine tool field especially relates to an excavator track beam telescopic machanism assembly and have excavator of this assembly.
Background
The chassis is one of the important structures of the lower vehicle part of the excavator. Referring to fig. 1, in general, an excavator chassis includes a walking frame 1 of an excavator and a track beam 2 fixed to both ends of the walking frame, a track 100 surrounds the track beam and is driven by a power device and a transmission device to realize the walking of the whole excavator, and the track beam 2 and the walking frame 1 of such an excavator are generally fixed to each other and cannot move relative to each other. However, since the excavator is often used in various severe working conditions, in order to improve the flexibility of the whole excavator structure of the excavator to adapt to different working conditions, an excavator chassis structure in which a track beam can be extended and retracted relative to a walking frame to adjust the chassis width has been developed in recent years, wherein one type of excavator chassis with the extensible track beam mainly comprises a guide hole in the left and right directions on the walking frame, an extensible cross beam inserted into the guide hole is arranged on the inner side of the track beam facing the walking frame, and a hydraulic cylinder for pushing the track beam to move left and right is further connected to the track beam. The width of the chassis can be adjusted by pushing the crawler beam to stretch by the hydraulic oil cylinder so as to adapt to different working conditions.
In order to control the working stroke of the oil cylinder in the chassis structure of the excavator and limit and protect the piston during the actuation of the piston, a limit mechanism is usually arranged. In the prior art, a commonly used limiting mechanism is a screw limiting assembly, which mainly includes a stopper connected to a track beam, and a screw penetrating through the stopper and screwed to a traveling frame by a nut lock, wherein a head is provided at one end of the screw close to the track beam, and when the track beam is pushed by an oil cylinder to extend to a certain stroke, the stopper on the track beam is blocked by the head of the screw, so as to limit the track beam and a piston rod.
At present, the screw is mostly a common rigid screw. However, the working conditions of the excavator during use are often complex, and due to various reasons such as uneven ground or shaking and collision, the screw rod is easy to be subjected to various abnormal bending and impact loads in the radial direction while being stretched, and is easy to break after long-term use, so that the serious conditions such as overlong extension of a piston rod which cannot be protected in a limiting way, blocking of a joint of the oil cylinder, oil leakage of the oil cylinder and the like are caused.
SUMMERY OF THE UTILITY MODEL
Therefore, to above-mentioned problem, through inventor's keen study, the utility model provides an excavator track beam telescopic machanism assembly and have excavator of this assembly of configuration optimization.
The utility model discloses a following technical scheme realizes:
the utility model provides an excavator track beam telescopic machanism assembly, including walking frame, track beam and hydro-cylinder, the track beam sets up the both sides of walking frame, the guiding hole of orientation about being equipped with on the walking frame, the track beam orientation one side of walking frame has and inserts flexible crossbeam in the guiding hole, be connected with the hydro-cylinder that removes about promoting the track beam on the track beam, still include the spacing subassembly of screw rod simultaneously, the spacing subassembly of screw rod is including connecting the track beam orientation the dog of walking frame one side, and pass the dog is connected screw rod on the walking frame, the screw rod has the stop towards the one end of track beam the head of dog, the pole of screw rod is gone up to have the flexonics section.
Wherein, for improving the tensile strength of screw rod spacing subassembly, be convenient for make, overhaul, the flexible connection section is wire rope.
For convenience in installation, the oil cylinder penetrates through the walking frame, and the left end and the right end of the oil cylinder are connected to the crawler beams on the left side and the right side respectively.
Wherein, in order to protect the hydro-cylinder, still install the backplate on the hydro-cylinder.
For the convenience of installation, the screw limiting assembly further comprises a gasket, a nut and a bolt, a first through hole and a second through hole are formed in the stop block, the bolt is used for fixedly connecting the stop block to one side, facing the walking frame, of the crawler beam through the first through hole, the screw penetrates through the second through hole to be connected to the walking frame in the left-right direction, and the threaded rod is locked on the walking frame through the nut and the gasket.
The utility model also provides an excavator, which comprises a base plate, the chassis has adopted foretell excavator track beam telescopic machanism assembly.
The utility model discloses following beneficial effect has: the utility model discloses in excavator track beam telescopic machanism's stop component, adopted the screw rod that has flexible connecting portion to carry on spacingly, when stop screw received unusual bending stress and impact load, flexible connecting portion can absorb the impact betterly and bear the radial force that stop screw received to it is difficult for bursting apart to protect stop screw.
Drawings
FIG. 1 is a schematic view of a prior art excavator chassis;
FIG. 2 is a schematic illustration of an embodiment of a track beam telescoping mechanism;
FIG. 3 is a schematic view of an embodiment of a track beam telescoping mechanism and its limiting mechanism;
FIG. 4 is a schematic illustration of an embodiment with two track beams in a minimum collapsed condition;
FIG. 5 is a schematic illustration of an embodiment with two track beams at maximum extension;
FIG. 6 is a schematic view of an embodiment of a screw stop assembly;
FIG. 7 is a schematic view of a stopper in the embodiment;
FIG. 8 is a schematic view of a screw in the example.
Detailed Description
To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
In order to solve the problem of frequent breakage of the limit screw in the background technology, the inventor conducts careful analysis on a fracture surface of the screw, finds that the screw mainly breaks at the joint of the screw and the lock nut, the fracture originates from a thread root, no obvious plastic deformation exists near a fracture opening, the fracture is obviously distributed into a source region, an expansion region and a prompt fracture region, and the thread root has no obvious impact trace. The analysis results preliminarily show that the fracture propagates from one side of the thread root to the other, so that the screw itself is subjected not only to axial tension but also to bending loads. In addition, the inventor also performed a plurality of bending fracture experiments on the limit screw, and applied a certain pressure to the screw in the radial direction, and the screw fractured after reaching a certain degree, and the fracture surface characteristics thereof were substantially the same as the above observation results.
After analysis, it is basically assumed that the reason why the above-mentioned stopper screw is broken is that it is subjected to abnormal bending and impact loads in the radial direction, and the rigid screw is broken after a long-term force application, i.e., at the weakest point in the force application.
Through inventor's keen study, provided an excavator track beam telescopic machanism assembly that structure is more optimized and have the excavator of this assembly, it is right now to combine attached drawing and embodiment the utility model discloses further explain.
Referring to fig. 2-8, a crawler beam telescopic mechanism assembly of an excavator is provided, which mainly comprises a walking frame 1, a crawler beam 2, a telescopic cross beam 3, an oil cylinder 4 and a screw rod limiting component 5. The walking frame 1 is provided with a guide hole 12 with left and right directions, a telescopic crossbeam 3 inserted into the guide hole 12 is arranged on the crawler beam 2 towards the inner side of the walking frame 1, and the crawler beam 2 is also connected with a hydraulic oil cylinder 4 for pushing the crawler beam 2 to move left and right. Specifically, both ends of the oil cylinder 4 are respectively and fixedly connected to the two crawler beams 2 on the left and right sides through the connecting plates 7. Guard plates 6 are respectively arranged above and below the oil cylinder 4 to protect the piston rod 41. The oil cylinder 4 may be provided with only one oil cylinder to push the track beam 2 on one side to extend (as shown in fig. 3), or may be provided with two oil cylinders to push the track beams 2 on both sides to extend (as shown in fig. 4 and 5).
The excavator track beam telescopic mechanism assembly in the embodiment further comprises a screw limiting component 5, and the screw limiting component 5 comprises a gasket 51, a nut 52, a bolt 53, a stopper 54 and a screw 55. The stopper 54 has a first through hole 541 and a second through hole 542, the bolt 53 fixedly connects the stopper 54 to the side of the track beam 2 facing the traveling frame 1 through the first through hole 541, the screw 55 passes through the second through hole 542 to be connected to the threaded hole 11 on the traveling frame 1 in the left-right direction, and the threaded rod 55 is locked to the traveling frame 1 through the nut 52 and the washer 51. The end of the screw 55 close to the track beam 2 is provided with a head 551, the head 551 meets the requirement that the minimum outer diameter is larger than the aperture of the second through hole 542, and when the track beam 2 is pushed by the oil cylinder 4 to extend to a certain stroke, the stop block 54 on the track beam 2 is stopped by the head 551 of the screw 55, so as to realize the limit of the track beam 2 and the piston rod 41.
In particular, the shaft of the screw 55 has a section of flexible connection portion, specifically, in this embodiment, the flexible connection portion is a section of steel cable 552, and when the steel cable 55 is subjected to an abnormal bending stress, the steel cable 55 has a certain flexibility, so that the steel cable can better bear a radial force applied to the screw 55. In addition, the tensile strength of the steel wire rope 55 itself is also high, and the tensile property of the screw limiting component 5 can be enhanced. And, there is the sign of broken string before wire rope 55 breaks, can prevent the appearance of problem in advance through overhauing.
In other embodiments, the cable 55 may be a flexible rod, a flexible metal alloy, or other flexible connecting member, but the material itself should satisfy the tensile strength and bending strength required by the excavator track beam telescopic mechanism assembly in practical use.
Based on foretell excavator track beam telescopic machanism assembly, the utility model also provides an excavator, the excavator chassis adopted foretell excavator track beam telescopic machanism assembly.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides an excavator track beam telescopic machanism assembly, includes walking frame, track beam and hydro-cylinder, the track beam sets up the both sides of walking frame, the guiding hole of orientation about being equipped with on the walking frame, the track beam orientation one side of walking frame has and inserts telescopic cross beam in the guiding hole, be connected with the hydro-cylinder that removes about promoting the track beam on the track beam, its characterized in that: the screw rod limiting assembly comprises a stop block and a screw rod, the stop block is connected to one side, facing the walking frame, of the crawler beam, the screw rod penetrates through the stop block and is connected to the walking frame, a head for stopping the stop block is arranged at one end, facing the crawler beam, of the screw rod, and a flexible connecting section is arranged on the rod body of the screw rod.
2. The excavator track beam telescoping mechanism assembly of claim 1, wherein: the flexible connecting section is a steel wire rope.
3. The excavator track beam telescoping mechanism assembly of claim 1, wherein: the oil cylinder penetrates through the walking frame, and the left end and the right end of the oil cylinder are respectively connected to the crawler beams on the left side and the right side.
4. The excavator track beam telescoping mechanism assembly of claim 1, wherein: and a guard plate is also arranged on the oil cylinder.
5. The excavator track beam telescoping mechanism assembly of claim 1, wherein: the screw limiting assembly further comprises a gasket, a nut and a bolt, a first through hole and a second through hole are formed in the stop block, the bolt enables the stop block to be fixedly connected to one side, facing the walking frame, of the crawler beam through the first through hole, the screw penetrates through the second through hole to be connected to the walking frame in a left-right direction, and the screw passes through the nut and the gasket and is locked on the walking frame.
6. An excavator comprising an undercarriage, wherein the undercarriage incorporates an excavator track beam telescopic assembly as claimed in any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922437482.8U CN211774091U (en) | 2019-12-30 | 2019-12-30 | Excavator track beam telescopic mechanism assembly and excavator with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922437482.8U CN211774091U (en) | 2019-12-30 | 2019-12-30 | Excavator track beam telescopic mechanism assembly and excavator with same |
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| CN211774091U true CN211774091U (en) | 2020-10-27 |
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| CN201922437482.8U Active CN211774091U (en) | 2019-12-30 | 2019-12-30 | Excavator track beam telescopic mechanism assembly and excavator with same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112660258A (en) * | 2020-12-22 | 2021-04-16 | 徐州考拉机器人科技有限公司 | Wheeled robot is with track chassis convenient to overhaul |
-
2019
- 2019-12-30 CN CN201922437482.8U patent/CN211774091U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112660258A (en) * | 2020-12-22 | 2021-04-16 | 徐州考拉机器人科技有限公司 | Wheeled robot is with track chassis convenient to overhaul |
| CN112660258B (en) * | 2020-12-22 | 2022-09-13 | 徐州考拉机器人科技有限公司 | Wheeled robot is with track chassis convenient to overhaul |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: The utility model relates to an excavator crawler beam telescopic mechanism assembly and an excavator with the assembly Effective date of registration: 20211217 Granted publication date: 20201027 Pledgee: China Everbright Bank Limited by Share Ltd. Xiamen branch Pledgor: Kato Zhongjun (Xiamen) Construction Machinery Co.,Ltd. Registration number: Y2021980015435 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230116 Granted publication date: 20201027 Pledgee: China Everbright Bank Limited by Share Ltd. Xiamen branch Pledgor: Kato Zhongjun (Xiamen) Construction Machinery Co.,Ltd. Registration number: Y2021980015435 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An excavator crawler beam telescopic mechanism assembly and an excavator with the assembly Effective date of registration: 20230210 Granted publication date: 20201027 Pledgee: China Everbright Bank Limited by Share Ltd. Xiamen branch Pledgor: Kato Zhongjun (Xiamen) Construction Machinery Co.,Ltd. Registration number: Y2023980032358 |