Vibration reduction mechanism of turnover cab

Abstract

The utility model belongs to the technical field of engineering machinery, and particularly discloses a damping mechanism of a turnover cab, which comprises a first connecting component and a second connecting component which are used for connecting a frame and the cab, the upper portion of the rear side of the cab is rotationally connected to the frame through a second connecting assembly. The bottom of the cab is connected with the frame through a first connecting assembly. The first connecting assembly comprises a bolt I, a shock absorber I, a shock absorber II and a nut II, and stable shock absorption connection of the bottom of the cab is achieved through combination of the bolt and the shock absorber; the shock absorber I is arranged between a nut of the bolt I and the frame, and the shock absorber II is arranged between the frame and the cab, so that the impact of road bumping on the cab is effectively reduced; the nut II is arranged on the upper side of the cab and is in threaded connection with the bolt I to ensure the connection stability; the bottom fixing position and the upper rotating position of the cab cooperatively play a role, transmission of vibration excitation of the whole machine is blocked to the maximum degree, the comfort of a driver is improved, and disassembly and assembly are convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery, and in particular relates to a vibration reduction mechanism of a flippable cab. Background Art

[0002] In the design and manufacture of skid steer loaders, the vibration reduction mechanism of the flip cab is a crucial component. The traditional way of connecting the cab to the frame usually adopts a rigid connection, that is, the cab is directly fixed on the frame. Although this connection method has a simple structure, it has significant disadvantages in actual use.

[0003] First, due to the direct rigid connection with the frame, it is difficult for the cab to effectively isolate the vibration and impact from the road during driving, resulting in poor vibration reduction performance. This not only affects the stability of the cab, but also reduces driving comfort, causing unnecessary fatigue and safety hazards to the driver.

[0004] Secondly, when the cab needs to be repaired and maintained, such as the engine or chassis, it is usually necessary to flip the cab to expose the relevant parts. However, since the cab is flipped as a whole, the disassembly and assembly of the cab vibration reduction mechanism (such as connecting bolts, shock absorbers, etc.) located at the bottom becomes extremely cumbersome. This not only increases the difficulty and time-consuming work of maintenance personnel, but may also damage the vibration reduction mechanism due to improper operation, further affecting the stability and safety of the cab. Utility Model Content

[0005] Aiming at the problems of poor vibration reduction performance of the cab and frame connection mechanism, poor machine comfort, and cumbersome assembly and disassembly in the prior art, a vibration reduction mechanism for a flippable cab is proposed. The utility model provides the following technical solutions:

[0006] A vibration damping mechanism for a flippable cab comprises a first connecting assembly and a second connecting assembly for connecting a vehicle frame and a cab; the upper rear portion of the cab is rotationally connected to the vehicle frame via the second connecting assembly; the bottom of the cab is connected to the vehicle frame via the first connecting assembly; the first connecting assembly comprises a bolt I, a shock absorber I, a shock absorber II and a nut II, the shock absorber I being arranged between the nut of the bolt I and the vehicle frame, the shock absorber II being arranged between the vehicle frame and the cab, and the nut II being arranged on the upper side of the cab and being threadedly connected to the bolt I.

[0007] Preferably, a sleeve I is sleeved on the outer side of the bolt I, and the shock absorber I and the shock absorber II are sleeved outside the sleeve I.

[0008] Preferably, a plate is sleeved on the shock absorber I, and the upper end surface of the plate abuts against the vehicle frame.

[0009] Preferably, a positioning groove I is provided on the upper side of the shock absorber I, and the plate is installed in the positioning groove I.

[0010] Preferably, a positioning groove II is provided on the lower side of the shock absorber II, and the positioning groove II is clamped on the upper side of the frame.

[0011] Preferably, a gasket I is provided on the lower side of the shock absorber I, and the nut of the bolt I abuts against the gasket I; a gasket II is provided on the upper side of the shock absorber II, and the upper end surface of the gasket II abuts against the cab.

[0012] Preferably, a nut I is provided on the upper side of the gasket II, and the nut I is threadedly connected to the outside of the bolt I and is arranged in the mounting hole of the cab.

[0013] Preferably, a gasket III is provided between the nut II and the cab.

[0014] Preferably, an articulated seat is provided on the frame, and a connecting seat is provided on the rear side of the cab, and the second connecting assembly includes a bolt II and a nut III, the bolt II passes through the articulated seat and the connecting seat, a shock absorber III is provided on the outer sleeve of the bolt II, and the shock absorber III is arranged in the articulated seat.

[0015] Preferably, the shock absorber III is provided with an inner steel sleeve and an outer steel sleeve on the inner and outer sides respectively, the inner steel sleeve abuts against the bolt II, and the outer steel sleeve abuts against the hinge seat.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. The first connecting assembly and the second connecting assembly work together to fix the bottom position of the cab and rotate the upper position, thereby blocking the transmission of the vibration excitation of the whole machine to the greatest extent, improving the comfort of the driver, improving the driver's working environment, and facilitating disassembly and assembly;

[0018] 2. A sleeve I is sleeved on the outer side of the bolt I, and the shock absorber I and the shock absorber II are sleeved outside the sleeve I, which enhances the stability of the structure and the compactness of the connection, and also facilitates the protection and replacement of the shock absorber;

[0019] 3. A gasket I is arranged on the lower side of the shock absorber I, and the nut of the bolt I abuts against the gasket I; a gasket II is arranged on the upper side of the shock absorber II, and the upper end surface of the gasket II abuts against the cab, which not only increases the tightness of the connection, but also plays a role in buffering and vibration reduction, thereby improving the comfort of the cab; a nut I is arranged on the upper side of the gasket II, and the nut I is threadedly connected to the outside of the bolt I and arranged in the mounting hole of the cab, thereby increasing the firmness of the connection, and also facilitating the disassembly and installation of the cab, and can realize double nut fixing, making the repair and maintenance of the whole machine more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 yes Figure 1 A schematic diagram of the local cross-sectional structure at the center A;

[0022] Figure 3 yes Figure 1 A schematic diagram of the partial cross-sectional structure at B in the middle;

[0023] In the attached drawings, 1 is a vehicle frame; 2 is a plate; 3 is a shock absorber Ⅰ; 4 is a gasket Ⅰ; 5 is a bolt Ⅰ; 6 is a sleeve; 7 is a shock absorber Ⅱ; 8 is a gasket Ⅱ; 9 is a cab; 10 is a nut Ⅰ; 11 is a gasket Ⅲ; 12 is a nut Ⅱ; 13 is an outer steel sleeve; 14 is a shock absorber Ⅲ; 15 is an inner steel sleeve; 16 is a bolt Ⅱ; 17 is a nut Ⅲ; 18 is a gasket Ⅳ. DETAILED DESCRIPTION

[0024] The directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only referenced to the directions of the drawings. Therefore, the directional words used are used to illustrate rather than limit the invention of the utility model.

[0025] like Figure 1-3 As shown, a vibration reduction mechanism of a flippable cab includes a first connection assembly and a second connection assembly for connecting a frame 1 and a cab 9; the upper rear part of the cab 9 is rotatably connected to the frame 1 through the second connection assembly; the bottom of the cab 9 is connected to the frame 1 through the first connection assembly. The cab 9 can be flipped when necessary, which is convenient for maintenance and cleaning of the bottom of the cab 9. The first connection assembly includes bolts Ⅰ5, shock absorbers Ⅰ3, shock absorbers Ⅱ7 and nuts Ⅱ12. Through the combination of bolts and shock absorbers, a stable vibration reduction connection is achieved at the bottom of the cab 9. The shock absorber Ⅰ3 is arranged between the nut of the bolt Ⅰ5 and the frame 1, and the shock absorber Ⅱ7 is arranged between the frame 1 and the cab 9, which can effectively reduce the impact of road bumps on the cab 9. The nut II 12 is arranged on the upper side of the cab 9 and is threadedly connected to the bolt I 5, ensuring the stability of the connection; the fixed position at the bottom of the cab 9 and the upper rotating position work together to block the transmission of vibration excitation of the whole machine to the greatest extent, improve the comfort of the driver, improve the driver's working environment, and facilitate disassembly and assembly.

[0026] Furthermore, a sleeve 6 is sleeved on the outer side of the bolt Ⅰ5, and the shock absorber Ⅰ3 and the shock absorber Ⅱ7 are sleeved outside the sleeve 6, which enhances the stability of the structure and the compactness of the connection, and also facilitates the protection and replacement of the shock absorber.

[0027] Furthermore, the shock absorber I3 is sleeved with a plate 2, and the upper end surface of the plate 2 abuts against the frame 1, thereby increasing the contact area between the shock absorber I3 and the frame 1 and improving the connection stability and vibration reduction effect.

[0028] Furthermore, a positioning groove I is provided on the upper side of the shock absorber I3, and the plate 2 is installed in the positioning groove I. The cooperation between the positioning groove I and the plate 2 makes the installation of the plate 2 more stable and not easy to loosen, further enhancing the vibration reduction effect.

[0029] Furthermore, a positioning groove II is provided on the lower side of the shock absorber II 7, and the positioning groove II is clamped on the upper side of the frame 1. This can make the connection between the shock absorber II 7 and the frame 1 tighter, avoid radial movement, and reduce looseness or displacement caused by vibration.

[0030] Furthermore, a gasket I4 is provided on the lower side of the shock absorber I3, and the nut of the bolt I5 abuts against the gasket I4; a gasket II8 is provided on the upper side of the shock absorber II7, and the upper end surface of the gasket II8 abuts against the cab 9. The provision of the gasket I4 and the gasket II8 not only increases the tightness of the connection, but also plays a role in buffering and vibration reduction, thereby improving the comfort of the cab 9.

[0031] Furthermore, a nut Ⅰ10 is provided on the upper side of the gasket Ⅱ8, and the nut Ⅰ10 is threadedly connected to the outside of the bolt Ⅰ5 and is provided in the mounting hole of the cab 9. The provision of the nut Ⅰ10 increases the firmness of the connection, and also facilitates the disassembly and installation of the cab 9; double nut fixation can be achieved, and the maintenance of the whole machine is more convenient. When the internal cabin of the equipment needs maintenance, it is only necessary to remove the nut 12 to flip the cab upwards. After the nut 10 is removed, the first connecting assembly will not fall to the ground due to the presence of the nut 10. A circular hole (i.e., a mounting hole) is opened on the bottom plate of the cab 9. The circular hole is larger than the diagonal diameter of the nut Ⅰ10 and meets the space requirement when the cab 9 is flipped;

[0032] Furthermore, a gasket III 11 is provided between the nut II 12 and the cab 9. The addition of the gasket III 11 further enhances the tightness of the connection and the vibration reduction effect, and improves the stability and comfort of the cab 9.

[0033] Shock absorber I3 and shock absorber II7 are both axisymmetric parts, made of highly elastic and relatively hard materials; the first connecting assembly blocks the transmission of vibration excitation through the double-layer shock absorber and sleeve 6, thereby achieving excellent shock absorption performance.

[0034] Furthermore, a hinge seat is provided on the vehicle frame 1, a connecting seat is provided at the rear side of the cab 9, and the second connecting assembly includes a bolt II 16 and a nut III 17. The bolt II 16 passes through the hinge seat and the connecting seat, and a shock absorber III 14 is provided on the outer sleeve of the bolt II 16, and the shock absorber III 14 is provided in the hinge seat. Such a design enables the rear side of the cab 9 to be stably rotatably connected to the vehicle frame 1, and the provision of the shock absorber III 14 reduces the vibration and impact of the cab 9 during the rotation process.

[0035] Furthermore, the shock absorber III 14 is provided with an inner steel sleeve 15 and an outer steel sleeve 13 on both sides thereof, the inner steel sleeve 15 abuts against the bolt II 16, and the outer steel sleeve 13 abuts against the hinge seat. The provision of the inner steel sleeve 15 and the outer steel sleeve 13 enhances the durability and stability of the shock absorber III 14, and also improves the tightness of the connection and the vibration reduction effect.

[0036] Furthermore, a gasket IV18 is provided on the axial inner side of the nut III17 to further improve the tightness of the connection.

[0037] The first connecting component and the second connecting component can both be used for shock absorption and work together to block the transmission of vibration excitation of the whole machine to the greatest extent, thereby improving the comfort of the driver and the driver's working environment.

Claims

1. A vibration reduction mechanism for a reversible cab, characterized in that: The invention comprises a first connecting assembly and a second connecting assembly for connecting a vehicle frame (1) and a cab (9); the upper rear portion of the cab (9) is rotatably connected to the vehicle frame (1) via the second connecting assembly; the bottom of the cab (9) is connected to the vehicle frame (1) via the first connecting assembly; the first connecting assembly comprises a bolt I (5), a shock absorber I (3), a shock absorber II (7) and a nut II (12); the shock absorber I (3) is arranged between the nut of the bolt I (5) and the vehicle frame (1), the shock absorber II (7) is arranged between the vehicle frame (1) and the cab (9), and the nut II (12) is arranged on the upper side of the cab (9) and is threadedly connected to the bolt I (5).

2. The vibration reduction mechanism of the reversible cab according to claim 1, characterized in that: A sleeve (6) is sleeved on the outer side of the bolt I (5), and the shock absorber I (3) and the shock absorber II (7) are sleeved outside the sleeve (6).

3. The vibration reduction mechanism of the reversible cab according to claim 1, characterized in that: The shock absorber I (3) is sleeved with a contact plate (2), and the upper end surface of the contact plate (2) abuts against the vehicle frame (1).

4. The vibration reduction mechanism of the reversible cab according to claim 3, characterized in that: The shock absorber I (3) is provided with a positioning groove I on its upper side, and the plate (2) is installed in the positioning groove I.

5. The vibration reduction mechanism of the reversible cab according to claim 1, characterized in that: A positioning groove II is provided on the lower side of the shock absorber II (7), and the positioning groove II is clamped on the upper side of the vehicle frame (1).

6. The vibration reduction mechanism of the reversible cab according to claim 1, characterized in that: A gasket I (4) is arranged on the lower side of the shock absorber I (3), and the nut of the bolt I (5) abuts against the gasket I (4); a gasket II (8) is arranged on the upper side of the shock absorber II (7), and the upper end surface of the gasket II (8) abuts against the cab (9).

7. The vibration reduction mechanism of the reversible cab according to claim 6, characterized in that: A nut I (10) is arranged on the upper side of the gasket II (8), and the nut I (10) is threadedly connected to the outside of the bolt I (5) and arranged in the mounting hole of the cab (9).

8. The vibration reduction mechanism of the reversible cab according to claim 1, characterized in that: A gasket III (11) is provided between the nut II (12) and the cab (9).

9. The vibration reduction mechanism of the reversible cab according to claim 1, characterized in that: An articulated seat is provided on the vehicle frame (1), a connecting seat is provided on the rear side of the cab (9), the second connecting assembly comprises a bolt II (16) and a nut III (17), the bolt II (16) passes through the articulated seat and the connecting seat, a shock absorber III (14) is provided on the outer sleeve of the bolt II (16), and the shock absorber III (14) is arranged in the articulated seat.

10. The vibration reduction mechanism of the reversible cab according to claim 9, characterized in that: An inner steel sleeve (15) and an outer steel sleeve (13) are respectively provided on the inner and outer sides of the shock absorber III (14); the inner steel sleeve (15) abuts against the bolt II (16), and the outer steel sleeve (13) abuts against the hinge seat.

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