CN212500697U - Novel floor frame structure of engineering machinery cab - Google Patents
Novel floor frame structure of engineering machinery cab Download PDFInfo
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- CN212500697U CN212500697U CN202021276852.0U CN202021276852U CN212500697U CN 212500697 U CN212500697 U CN 212500697U CN 202021276852 U CN202021276852 U CN 202021276852U CN 212500697 U CN212500697 U CN 212500697U
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Abstract
A novel engineering machinery cab floor frame structure comprises a lower side plate of a floor frame; the lower side plate of the floor frame comprises a main plate and an auxiliary plate, wherein the main plate and the auxiliary plate are both plate-shaped structures with cavities arranged inside, an upper panel of each plate-shaped structure is an upper plate, and a lower panel of each plate-shaped structure is a lower plate; the main plate and the auxiliary plate are both connected with a plurality of bolt holes, and the bolt holes can only penetrate through one of the upper plate or the lower plate; the lower parts of the main board and the auxiliary board are both provided with sound absorbing layers; effectual reduction transmits the inside noise of driver's cabin through the floor frame, and this floor frame structural style makes its structural strength obtain promoting, has reduced its own vibration, has improved the NVH performance of driver's cabin, and local grillage simple structure easily realizes, has good effect to the decay of sound, has promoted driver and crew's travelling comfort.
Description
The technical field is as follows:
the utility model relates to an engineering machine tool equipment technical field, the more specifically novel engineering machine tool driver's cabin floor frame structure that says so.
Background art:
the noise sources in the cab of the engineering machine are mainly air-borne noise and structure-borne noise, which are referred to as air noise and structure noise for short. The air noise mainly comprises surface radiation noise, air intake and exhaust noise, fan noise and other medium-high frequency gas flow noise of the power assembly, and the structure noise mainly comprises low-medium frequency vibration noise generated after vibration of a power transmission system is transmitted to a cab through a frame. The noise reduction mode can be divided into active noise reduction and passive noise reduction, the active noise reduction can be realized by a power transmission system with small vibration and low noise, which is the most direct and simple method for solving the noise problem in a cab, but the high requirement on the power transmission system is difficult to realize in consideration of the economy and the practicability, so the passive noise reduction becomes an effective means for various large engineering machinery manufacturers. Especially, at the inside structure of making an uproar that falls of driver's cabin and external design is reasonable, plays very big effect to the control of driver's cabin internal noise, and the driver's cabin is installed on the floor frame, and the floor frame has direct influence to the internal noise of driver's cabin, consequently needs to design a floor frame structure that can effective damping vibration and noise to promote driver and crew's travelling comfort.
The invention content is as follows:
in order to solve the problems and overcome the defects of the prior art, the utility model provides a novel engineering machinery cab floor frame structure which has simple structure, easy realization, large structural strength, effective attenuation of vibration and noise and improvement of comfort of drivers and passengers, and comprises a lower side plate of the floor frame; the lower side plate of the floor frame comprises a main plate and an auxiliary plate, wherein the main plate and the auxiliary plate are both plate-shaped structures with cavities arranged inside, an upper panel of each plate-shaped structure is an upper plate, and a lower panel of each plate-shaped structure is a lower plate; the main plate and the auxiliary plate are both connected with a plurality of bolt holes, and the bolt holes can only penetrate through one of the upper plate or the lower plate; the lower parts of the main board and the auxiliary board are both provided with sound absorption layers.
Furthermore, the main plate and the auxiliary plate are fixedly connected through bolts.
Furthermore, the floor rack comprises a floor rack upper side plate and a floor rack middle side plate, wherein the floor rack upper side plate, the floor rack middle side plate and the floor rack lower side plate are sequentially connected in a welding mode from top to bottom.
Further, the upper plate is provided with a plurality of nuts.
Furthermore, the sound absorption layer is made of soft sound absorption materials.
Furthermore, the sound absorption layer is made of hard sound absorption materials.
The utility model has the advantages that:
the utility model provides a novel engineering machine tool driver's cabin ground plate frame structure, effectual reduction transmits the inside noise of driver's cabin through ground plate frame, and this ground plate frame structural style makes its structural strength obtain promoting, has reduced the vibration of its own, has improved the NVH performance of driver's cabin, and local grillage simple structure easily realizes, has good effect to the decay of sound, has promoted driver and crew's travelling comfort.
The effect of separation sound wave transmission is realized through the cavity that upper plate and hypoplastron formed, because need pass through bolt installation annex on the floor frame curb plate, lead to inevitably setting up the bolt hole on the floor frame curb plate to influenced the separation sound wave effect of cavity, the utility model discloses a set up the nut on the upper plate, make the bolt hole only need run through upper plate or hypoplastron can, need not run through both simultaneously, guaranteed the leakproofness and the separation effect of cavity.
The lower part of mainboard and subplate all is provided with the sound absorbing layer, adopts soft or stereoplasm sound absorbing material to make, effectively realizes sound absorbing effect, and soft sound absorbing material can also prevent that the foreign matter from beating floor frame downside board and leading to the noise simultaneously.
Description of the drawings:
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic perspective view of the present invention;
in the drawings: 1. the floor frame comprises a floor frame lower side plate 2, a main plate 3, an auxiliary plate 4, an upper plate 5, a lower plate 6, bolt holes 7, a sound absorption layer 8, nuts 9, cavities 10, a floor frame middle side plate 11 and a floor frame upper side plate.
The specific implementation mode is as follows:
in order to make the purpose, technical solution and advantages of the present invention clearer, the following will combine the attached drawings 1 and 2 of the present invention to perform more detailed description of the present invention.
The utility model provides a novel engineering machinery cab floor frame structure, which comprises a floor frame lower side plate 1; the floor frame lower side plate 1 comprises a main plate 2 and an auxiliary plate 3, wherein the main plate 2 and the auxiliary plate 3 are both plate-shaped structures with cavities 9 arranged inside, an upper panel of each plate-shaped structure is an upper plate 4, and a lower panel of each plate-shaped structure is a lower plate 5; the main plate 2 and the auxiliary plate 3 are both connected with a plurality of bolt holes 6, and the bolt holes 6 can only penetrate through one of the upper plate 4 or the lower plate 5; the lower parts of the main board 2 and the auxiliary board 3 are both provided with sound absorption layers 7; the main board 2 and the auxiliary board 3 are fixedly connected through bolts; the floor rack is characterized by further comprising a floor rack upper side plate 11 and a floor rack middle side plate 10, wherein the floor rack upper side plate 11, the floor rack middle side plate 10 and the floor rack lower side plate 1 are connected in sequence from top to bottom in a welding mode; the upper plate 4 is provided with a plurality of nuts 8; the sound absorption layer 7 is made of soft sound absorption materials; the sound absorption layer 7 is made of hard sound absorption materials.
The utility model discloses a one of them embodiment as follows:
the floor frame comprises a floor frame lower side plate 1, a floor frame lower side plate 1 is a main sound insulation structure, and further comprises a floor frame middle side plate 10 and a floor frame upper side plate 11, wherein the floor frame lower side plate 1, the floor frame middle side plate 10 and the floor frame upper side plate 11 are connected in a welding mode sequentially from bottom to top, the floor frame lower side plate 1 and the floor frame upper side plate 11 are arranged horizontally, and the floor frame middle side plate 10 is arranged vertically; the floor frame lower side plate 1, the floor frame middle side plate 10 and the floor frame upper side plate 11 are combined together to form a floor frame, the floor frame is installed on the main frame, and the cab is installed on the floor frame.
The lower side plate 1 of the floor frame mainly comprises a main plate 2 and an auxiliary plate 3, and the main plate 2 and the auxiliary plate 3 are connected through bolts; the main board 2 and the auxiliary board 3 are of the same structure and are of plate-shaped structures with cavities 9 in the middle, and the cavities 9 are filled with air; the main board 2 and the auxiliary board 3 both comprise an upper board 4 and a lower board 5, the upper board of the plate-shaped structure is the upper board 4, the lower board of the plate-shaped structure is the lower board 5, and a cavity 9 is arranged between the upper board 4 and the lower board 5.
The upper plate 4 is fixedly provided with a plurality of nuts, the upper plate 4 and the lower plate 5 are both provided with a plurality of bolt holes 6, the accessory is installed on the lower side plate 1 of the floor frame by the bolt penetrating through the bolt holes 6, and the bolt is screwed with the nut 8 to be fixed after penetrating through the bolt holes 6; the bolt holes 6 can only penetrate through one of the upper plate 4 or the lower plate 5, namely, the bolts cannot penetrate through the upper plate 4 and the lower plate 5 at the same time, and the upper and lower isolation of the cavity 9 is ensured.
The lower part of the lower side plate 1 of the floor frame is also provided with a sound absorption layer 7, and the sound absorption layer 7 is made of soft sound absorption materials or hard sound absorption materials, so that the sound absorption and sound insulation effects can be achieved.
A double-layer sound insulation structure is formed by the sound insulation layer 7 and the cavity 9, so that the sound insulation and absorption effects are improved.
The principle that the floor frame lower side plate 1 has good sound insulation and absorption performance:
the sound at the bottom of the cab absorbs a part of energy through the sound absorption layer 7 and then is transmitted to the lower plate 5, a part of the sound is reflected by the lower plate 5 to form a reflected wave 1 so as to be eliminated, the other part of the sound is transmitted to the cavity 9 through the lower plate 5 to form a transmitted wave 1, the transmitted wave 1 is transmitted to the upper plate 4, a part of the transmitted wave 1 is reflected to form a reflected wave 2, and the other part of the transmitted wave 2 penetrates through the upper plate 4; in the cavity 9, the sound wave repeatedly propagates between the upper plate 4 and the lower plate 5, and new reflected wave and transmitted wave are continuously formed, and the energy of the sound wave is continuously attenuated. The sound wave is transmitted from the external environment to the inside of the cab, and the energy is greatly attenuated through the sound absorption effect of the sound absorption layer 7 and the reflection and transmission of the main board 2 and the auxiliary board 3.
Because the air is arranged in the cavity 9 and has certain elasticity, the vibration of the lower plate 5 is transmitted to the air and then transmitted to the upper plate 4 after being attenuated, the vibration energy is greatly reduced, and the generated sound wave is reduced, so that the cab floor frame structure has good sound absorption and insulation functions.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A novel engineering machinery cab floor frame structure comprises a floor frame lower side plate (1); the method is characterized in that: the floor frame lower side plate (1) comprises a main plate (2) and an auxiliary plate (3), the main plate (2) and the auxiliary plate (3) are both plate-shaped structures with cavities (9) arranged inside, an upper panel of each plate-shaped structure is an upper plate (4), and a lower panel of each plate-shaped structure is a lower plate (5); the main plate (2) and the auxiliary plate (3) are both connected with a plurality of bolt holes (6), and the bolt holes (6) can only penetrate through one of the upper plate (4) or the lower plate (5); and the lower parts of the main board (2) and the auxiliary board (3) are provided with sound absorbing layers (7).
2. The novel engineering machinery cab floor frame structure according to claim 1, wherein: the main plate (2) and the auxiliary plate (3) are fixedly connected through bolts.
3. The novel engineering machinery cab floor frame structure according to claim 1, wherein: the floor frame is characterized by further comprising a floor frame upper side plate (11) and a floor frame middle side plate (10), wherein the floor frame upper side plate (11), the floor frame middle side plate (10) and the floor frame lower side plate (1) are connected in sequence in a welding mode from top to bottom.
4. The novel engineering machinery cab floor frame structure according to claim 1, wherein: the upper plate (4) is provided with a plurality of nuts (8).
5. The novel engineering machinery cab floor frame structure according to claim 1, wherein: the sound absorption layer (7) is made of soft sound absorption materials.
6. The novel engineering machinery cab floor frame structure according to claim 1, wherein: the sound absorption layer (7) is made of hard sound absorption materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021276852.0U CN212500697U (en) | 2020-07-03 | 2020-07-03 | Novel floor frame structure of engineering machinery cab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021276852.0U CN212500697U (en) | 2020-07-03 | 2020-07-03 | Novel floor frame structure of engineering machinery cab |
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| CN212500697U true CN212500697U (en) | 2021-02-09 |
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| CN202021276852.0U Active CN212500697U (en) | 2020-07-03 | 2020-07-03 | Novel floor frame structure of engineering machinery cab |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114802042A (en) * | 2022-06-23 | 2022-07-29 | 质子汽车科技有限公司 | Vehicle cab and vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114802042A (en) * | 2022-06-23 | 2022-07-29 | 质子汽车科技有限公司 | Vehicle cab and vehicle |
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