Shock absorption and noise reduction structure of loader cab

Abstract

The utility model relates to the technical field of engineering machinery cab door sealing, in particular to a loader cab shock absorption and noise reduction structure which comprises a cab body, the cab body comprises a framework, the framework comprises a front side special-shaped stand column, a rear side special-shaped stand column, a top frame and a bottom frame, the front side special-shaped stand column is formed by sequentially connecting nine edges in a surrounding mode, and the rear side special-shaped stand column is formed by sequentially connecting the nine edges in a surrounding mode. Wherein the front-first edge is perpendicular to the front-second edge so as to be matched with a door frame, the front-sixth edge is matched with glass, the front-fifth edge is a bevel edge, the rear side special-shaped stand column is formed by sequentially connecting and enclosing eight edges, the rear-first edge is perpendicular to the rear-second edge so as to be matched with the door frame, the rear-sixth edge is matched with the glass, and the rear side special-shaped stand column is formed by sequentially connecting and enclosing eight edges. The two special-shaped stand columns with different sections are adopted, due to the irregular special-shaped structures of the stand columns, the vibration frequency and the transmission path of sound in the steel pipe are changed, the resonance phenomenon is greatly reduced, and therefore noise is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery cab door sealing, and particularly relates to a shock-absorbing and noise-reducing structure for a loader cab. Background Art

[0002] Loaders are widely used in construction, ports, mines and other engineering sites. They can shovel and load bulk materials such as soil, sand, lime, coal, etc., and can also do light shoveling and digging of ore, hard soil, etc. By replacing different auxiliary working devices, they can also perform bulldozing, lifting and other material loading and unloading operations. They are composed of systems such as engine, transmission system, traveling device, hydraulic steering, electrical instruments, driving control and working device. The cab is the most direct working position for the operator when operating the machine, and its comfort level has a significant impact on the driver's work efficiency.

[0003] As an important source of pollution, noise has received more and more attention, and national mandatory standards have been introduced one after another. With the development of construction machinery, the quality requirements for construction machinery products are no longer just performance indicators such as work efficiency and reliability and stability. The level of product noise has also become an important indicator for measuring product quality. The main sources of noise in the cab are engine vibration noise, transmission system noise, hydraulic system noise, and the noise of the vehicle body itself. Excessive noise not only makes the driver easily fatigued, damages the driver's normal hearing, affects the driver's work efficiency and physical health, but may also cause pollution to the surrounding environment. Reducing the noise inside the cab and improving work comfort are future development trends. Therefore, in order to solve the above problems such as vibration and noise, the utility model design proposes a shock-absorbing and noise-reducing structure for the loader cab. Utility Model Content

[0004] The utility model provides a shock-absorbing and noise-reducing structure for a loader cab, which can solve the problems pointed out in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: including a cab body, the cab body including a frame, the frame including a front special-shaped column, a rear special-shaped column, a top frame and a bottom frame, the front special-shaped column is formed by nine edges connected and enclosed in sequence, wherein the front-first edge and the front-second edge are vertically arranged to cooperate with the door frame, the front-sixth edge cooperates with the glass, and the front-fifth edge is a beveled edge, the rear special-shaped column is formed by eight edges connected and enclosed in sequence, wherein the rear-first edge and the rear-second edge are vertically arranged to cooperate with the door frame, the rear-sixth edge cooperates with the glass, and the rear-fifth edge is a beveled edge.

[0006] Preferably, the bottom of the front special-shaped column is sealed by a first sealing plate, and the bottom of the rear special-shaped column is sealed by a second sealing plate.

[0007] Preferably, the top frame includes side beams and a grid frame on all four sides.

[0008] Preferably, reinforcing ribs are welded at the connections between the front special-shaped column and the rear special-shaped column and the top frame.

[0009] Preferably, front shock absorbers are symmetrically provided on both sides of the front end of the bottom of the bottom frame, and rear shock absorbers are respectively provided on both sides of the rear end of the bottom of the bottom frame, the front shock absorbers and the rear shock absorbers are located on the same installation plane, and the spacing between the front shock absorbers on both sides is not equal to the spacing between the rear shock absorbers on both sides.

[0010] Preferably, the lines connecting the four points of the front shock absorbers on both sides and the rear shock absorbers on both sides are trapezoidal.

[0011] The utility model provides a vibration reduction and noise reduction structure for a loader cab, which has the following beneficial effects:

[0012] 1. Two kinds of special-shaped columns with different cross-sections are used. Due to their irregular structure, the vibration frequency and transmission path of the sound in the steel pipe are changed, which greatly reduces the occurrence of resonance and thus reduces noise.

[0013] 2. The special-shaped columns and the bottom frame are welded together to form an integrated skeleton. The use of special-shaped pipes not only strengthens the overall structural strength of the cab while fully considering noise reduction. The bottom frame and the special-shaped columns are welded together as one, which not only strengthens the structural strength of the cab skeleton, but also increases the sealing of the cab and reduces the external noise transmitted into the cab.

[0014] 3. Setting up a shock-absorbing system can increase the decoupling rate of the shock-absorbing system and improve the seismic isolation rate of the shock-absorbing system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0017] Figure 3 It is a cross-sectional schematic diagram of the front side special-shaped column of the utility model;

[0018] Figure 4 It is a cross-sectional schematic diagram of the rear side special-shaped column of the utility model;

[0019] Figure 5 This is a schematic diagram of the position of the shock absorber of the utility model;

[0020] Description of reference numerals:

[0021] Numbers in the figure: front special-shaped pillar 11; front-first side 111; front-second side 112; front-fifth side 115; front-sixth side 116; rear special-shaped pillar 12; rear-first side 121; rear-second side 122; rear-fifth side 125; rear-sixth side 126; top frame 13; side crossbeam 131; grid frame 132; bottom frame 14; first closing plate 15; second closing plate 16; reinforcing rib 17; front shock absorber 21; rear shock absorbers 22 on both sides. DETAILED DESCRIPTION

[0022] A specific implementation mode of the present utility model is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present utility model is not limited by the specific implementation mode.

[0023] Embodiment 1:

[0024] like Figure 1-4 As shown, a loader cab shock absorption and noise reduction structure includes a cab body, the cab body includes a frame, a skin, a door, a window, etc. The frame includes a front side special-shaped column 11, a rear side special-shaped column 12, a top frame 13 and a bottom frame 14. The front side special-shaped column 11 is formed by nine sides connected and enclosed in sequence, wherein the front-first side 111 and the front-second side 112 are vertically arranged to match the door frame, the front-sixth side 116 matches the glass, the front-fifth side 115 is a bevel, and the rear side special-shaped column 12 is formed by eight The edges are connected and enclosed in sequence, wherein the rear-first edge 121 and the rear-second edge 122 are vertically arranged to cooperate with the door frame, the rear-sixth edge 126 cooperates with the glass, the rear-fifth edge 125 is a beveled edge, and the front-fifth edge 115 and the rear-fifth edge 125 are beveled edges. In order to avoid the field of vision and make the field of vision as unobstructed as possible, two special-shaped columns with different cross-sections are used. Due to their irregular special-shaped structure, the vibration frequency and transmission path of the sound in the steel pipe are changed, which greatly reduces the occurrence of resonance and thus reduces noise.

[0025] The bottom of the front special-shaped pillar 11 is blocked by a first sealing plate 15, and the bottom of the rear special-shaped pillar 12 is blocked by a second sealing plate 16, so as to reduce the noise transmitted into the interior of the cab and improve driving comfort.

[0026] The top frame 13 includes side beams 131 and a grid frame 132 on all sides to meet the need to protect the cab from falling objects.

[0027] Reinforcing ribs 17 are welded at the connection between the front special-shaped column 11 and the rear special-shaped column 12 and the top frame 13, which can improve the structural strength and meet the anti-rollover requirements of the cab.

[0028] Embodiment 2:

[0029] like Figure 5As shown, front shock absorbers 21 are symmetrically provided on both sides of the front end of the bottom of the bottom frame 14, and rear shock absorbers 22 are respectively provided on both sides of the rear end of the bottom of the bottom frame 14. The front shock absorbers 21 and the rear shock absorbers 22 are located on the same installation plane, and the spacing between the front shock absorbers 21 on both sides is not equal to the spacing between the rear shock absorbers 22 on both sides, so as to increase the decoupling rate of the shock absorbing system and improve the seismic isolation rate of the shock absorbing system. Specifically, the lines connecting the four points of the front shock absorbers 21 on both sides and the rear shock absorbers 22 on both sides are trapezoidal.

[0030] The above disclosures are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A vibration and noise reduction structure for a loader cab, comprising a cab body, wherein the cab body comprises a frame, and is characterized in that: The frame comprises a front special-shaped column (11), a rear special-shaped column (12), a top frame (13) and a bottom frame (14); the front special-shaped column (11) is formed by nine edges connected in sequence, wherein a front first edge (111) and a front second edge (112) are arranged vertically to match with a door frame, a front sixth edge (116) matches with glass, and a front fifth edge (115) is a hypotenuse; the rear special-shaped column (12) is formed by eight edges connected in sequence, wherein a rear first edge (121) and a rear second edge (122) are arranged vertically to match with a door frame, a rear sixth edge (126) matches with glass, and a rear fifth edge (125) is a hypotenuse.

2. The vibration and noise reduction structure of a loader cab according to claim 1, characterized in that: The bottom of the front special-shaped column (11) is sealed by a first sealing plate (15), and the bottom of the rear special-shaped column (12) is sealed by a second sealing plate (16).

3. The vibration and noise reduction structure of a loader cab according to claim 1, characterized in that: The top frame (13) comprises side beams (131) and a grid frame (132) on all four sides.

4. The vibration and noise reduction structure of a loader cab according to claim 1, characterized in that: Reinforcing ribs (17) are welded at the connection points between the front special-shaped column (11) and the rear special-shaped column (12) and the top frame (13).

5. A loader cab vibration reduction and noise reduction structure according to any one of claims 1 to 4, characterized in that: Front shock absorbers (21) are symmetrically arranged on both sides of the front end of the bottom of the bottom frame (14), and rear shock absorbers (22) are respectively arranged on both sides of the rear end of the bottom of the bottom frame (14), the front shock absorbers (21) and the rear shock absorbers (22) are located on the same installation plane, and the spacing between the front shock absorbers (21) on both sides is not equal to the spacing between the rear shock absorbers (22) on both sides.

6. The vibration and noise reduction structure of a loader cab according to claim 5, characterized in that: The connecting line of the four points of the front shock absorbers (21) on both sides and the rear shock absorbers (22) on both sides is a trapezoid.

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