Cab hydraulic suspension

Abstract

The utility model discloses a hydraulic suspension of a cab, and belongs to the technical field of automobiles. The defect that in the prior art, an automobile cab is large in vibration noise is overcome. The rubber spring mainly comprises a rubber main spring, an upper liquid chamber and a lower liquid chamber are arranged on the upper side and the lower side in the rubber main spring respectively, and a flow channel communicated with the upper liquid chamber and the lower liquid chamber is further arranged in the rubber main spring. An upper mounting plate is mounted at the top of the rubber main spring, a bottom supporting plate connected with the upper mounting plate is mounted at the bottom of the rubber main spring, a lower mounting plate is mounted between the upper liquid chamber and the lower liquid chamber of the rubber main spring, and the lower mounting plate is inserted into the rubber main spring.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobiles, and in particular relates to a hydraulic suspension of a cab. Background Art

[0002] The cab suspension is generally used in a non-load-bearing body structure, installed between the cab and the frame, and is used to reduce the transmission of frame excitation to the cab vibration, reduce the vibration and noise of the cab, and improve the comfort of the cab. Rubber bushings can reduce the transmission of vibration, but since the rubber damping mainly comes from the friction between molecules during deformation, the damping is small during large amplitude vibration, and the effect of reducing vibration is weak. Since the damping of the hydraulic suspension mainly comes from the damping effect when the liquid passes through the flow channel, it can well reduce the vibration during large amplitude and improve the comfort of the cab. Based on this principle, the utility model can reduce the transmission of frame vibration to the cab and improve the comfort of the cab. Patent Publication No. CN217926917U discloses a cab hydraulic suspension rubber pad, which mainly includes a rubber main spring assembly, the rubber main spring assembly includes a rubber main spring, a main liquid chamber arranged on the side wall of the rubber main spring inner cavity, and a movable membrane arranged on the side wall of the rubber main spring inner cavity corresponding to the main liquid chamber. The cab hydraulic suspension rubber pad in the above patent has the disadvantages of complex structure and high cost, and the suspension in the above patent mainly bears load in the radial direction, which is not suitable for the scene that requires axial arrangement. The radial dimension of the hydraulic suspension that bears load in the radial direction is generally larger than that in the axial direction, so it occupies a large space. Summary of the invention

[0003] The utility model aims to provide a hydraulic suspension for a cab, which can be axially installed and arranged, and reduces the vibration amplitude transmitted from the frame to the cab, thereby reducing the vibration and noise of the cab and improving the comfort of the vehicle.

[0004] The utility model is realized by adopting the following technical scheme: a hydraulic suspension of a cab, comprising a rubber main spring, wherein an upper liquid chamber and a lower liquid chamber are respectively arranged on the upper and lower sides of the rubber main spring, and a flow channel connecting the upper liquid chamber and the lower liquid chamber is also arranged in the rubber main spring; an upper mounting plate is installed on the top of the rubber main spring, a bottom support plate connected to the upper mounting plate is installed on the bottom of the rubber main spring, a lower mounting plate is installed between the upper liquid chamber and the lower liquid chamber of the rubber main spring, and the lower mounting plate is inserted into the rubber main spring.

[0005] Furthermore, a connecting hole is provided on the top surface of the rubber main spring, and a fixing bolt passes through the connecting hole. Through holes for the fixing bolt to pass through are respectively provided on the upper mounting plate and the bottom support plate, and a fixing nut is installed on the fixing bolt. The upper mounting plate and the bottom support plate are connected by the fixing bolt and the fixing nut.

[0006] Furthermore, an intermediate support is installed in the rubber main spring, and the flow channel is opened in the intermediate support.

[0007] Furthermore, the middle support is cylindrical, and a plurality of flow channels are arranged in the middle support at intervals along the circumferential direction. The upper side of the flow channel is connected to the upper liquid chamber through an upper connecting port, and the lower side of the flow channel is connected to the lower liquid chamber through a lower connecting port; the upper liquid chamber and the lower liquid chamber are both annular.

[0008] Furthermore, the intermediate support is vulcanizedly connected to the rubber main spring.

[0009] Furthermore, an upper mounting hole is provided on the upper mounting plate.

[0010] Furthermore, the lower mounting plate is provided with a lower mounting hole outside the rubber main spring.

[0011] Furthermore, the rubber main spring is cylindrical, the lower mounting plate is annular and the inner end is inserted into the rubber main spring; the lower mounting plate is vulcanized and connected to the rubber main spring.

[0012] Furthermore, the upper mounting plate and the bottom support plate are respectively connected to the rubber main springs by vulcanization.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The hydraulic suspension of the cab described in the utility model can reduce the vibration amplitude transmitted from the frame to the cab, thereby reducing the vibration and noise of the cab and improving the comfort of the vehicle. Moreover, it is axially installed and arranged, occupying a small space. The utility model also has the advantages of simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 It is the front view of the utility model;

[0017] Figure 3 yes Figure 2 Sectional view at A-A in the middle;

[0018] Figure 4 yes Figure 2 The cross-sectional view at B-B in the middle;

[0019] Figure 5 It is a schematic diagram of the intermediate support 11 of the present invention.

[0020] In the figure: 1. rubber main spring; 2. upper liquid chamber; 3. lower liquid chamber; 4. flow channel; 5. upper mounting plate; 6. bottom support plate; 7. lower mounting plate; 8. connecting hole; 9. fixing bolt; 10. fixing nut; 11. middle support; 12. upper connecting port; 13. lower connecting port; 14. upper mounting hole; 15. lower mounting hole. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0022] A cab hydraulic suspension includes a rubber main spring 1, wherein an upper liquid chamber 2 and a lower liquid chamber 3 are respectively provided on the upper and lower sides of the rubber main spring 1, and a flow channel 4 connecting the upper liquid chamber 2 and the lower liquid chamber 3 is also provided in the rubber main spring 1. In the utility model, the upper liquid chamber 2, the lower liquid chamber 3 and the flow channel 4 are all filled with liquid, and the liquid can enter the lower liquid chamber 3 from the upper liquid chamber 2 or enter the upper liquid chamber 2 from the lower liquid chamber 3 through the flow channel 4.

[0023] An upper mounting plate 5 is installed on the top of the rubber main spring 1, and a bottom support plate 6 connected to the upper mounting plate 5 is installed on the bottom of the rubber main spring 1. When in use, the upper mounting plate 5 is fixedly connected to the connecting plate on the cab, and the cab is connected to the upper mounting plate 5 through the connecting plate. An upper mounting hole 14 is opened on the upper mounting plate 5. In the utility model, three evenly distributed upper mounting holes 14 can be opened on the upper mounting plate 5. During installation, a plurality of fixing holes matching the upper mounting holes 14 can be opened on the connecting plate of the cab. The upper mounting holes 14 and the fixing holes on the connecting plate of the cab are fixedly connected by bolts and nuts. Holes for fixing bolts 9 and fixing nuts 10 to pass through are also opened on the connecting plate of the cab.

[0024] The rubber main spring 1 is provided with a lower mounting plate 7 between the upper liquid chamber 2 and the lower liquid chamber 3, and the lower mounting plate 7 is inserted into the rubber main spring 1. The lower mounting plate 7 is inserted into the rubber main spring 1 to a certain depth so that the inner end of the lower mounting plate 7 is connected to the middle support 11. The lower mounting plate 7 is provided with a lower mounting hole 15 outside the rubber main spring 1. In the utility model, three evenly distributed lower mounting holes 15 can be provided on the lower mounting plate 7. During installation, a plurality of fixing holes cooperating with the lower mounting holes 15 can be provided on the connecting plate of the frame. The lower mounting holes 15 and the fixing holes on the connecting plate of the frame are fixedly connected by bolts and nuts. A hole for the lower side of the rubber main spring 1 to pass through is also provided on the connecting plate of the frame, so that the lower side of the rubber main spring 1 can be inserted into the connecting plate of the frame, and then the lower mounting plate 7 is connected to the connecting plate on the frame by bolts and nuts.

[0025] A connecting hole 8 is provided on the top surface of the rubber main spring 1, and a fixing bolt 9 passes through the connecting hole 8. Through holes for the fixing bolt 9 to pass through are respectively provided on the upper mounting plate 5 and the bottom support plate 6. A fixing nut 10 is installed on the fixing bolt 9. The upper mounting plate 5 and the bottom support plate 6 are connected by the fixing bolt 9 and the fixing nut 10. The fixing bolt 9 passes through the through hole on the bottom support plate 6, the connecting hole 8 on the rubber main spring 1 and the through hole on the upper mounting plate 5 in sequence. The fixing bolt 9 can only have an external thread on the upper side. The fixing bolt 9 is installed with a fixing nut 10 on the upper side of the upper mounting plate 5. The fixing bolt 9 and the fixing nut 10 connect the upper mounting plate 5 and the bottom support plate 6. When the upper mounting plate 5 moves upward, the upper mounting plate 5 drives the bottom support plate 6 to move upward through the fixing bolt 9, thereby causing the bottom support plate 6 to compress the rubber main spring 1 on the lower side of the lower mounting plate 7 upward. Since the lower mounting plate 7 is fixedly connected to the connecting plate of the frame, the part of the rubber main spring 1 on the lower side of the lower mounting plate 7 will be compressed, causing the liquid in the lower liquid chamber 3 to flow to the upper liquid chamber 2 through the flow channel 4.

[0026] The intermediate support 11 is installed in the rubber main spring 1, and the flow channel 4 is opened in the intermediate support 11. The utility model installs the intermediate support 11 in the rubber main spring 1. The intermediate support 11 can connect the upper liquid chamber 2 and the lower liquid chamber 3 while supporting the rubber main spring 1. The liquids in the upper liquid chamber 2 and the lower liquid chamber 3 flow through the flow channel 4 on the intermediate support 11. The intermediate support 11 is vulcanized and connected to the rubber main spring 1.

[0027] The middle support 11 is cylindrical, and a plurality of flow channels 4 are arranged in the middle support 11 at intervals along the circumferential direction. The upper side of the flow channel 4 is connected to the upper liquid chamber 2 through the upper connection port 12, and the lower side of the flow channel 4 is connected to the lower liquid chamber 3 through the lower connection port 13; the upper liquid chamber 2 and the lower liquid chamber 3 are both annular. The utility model can make the flow of liquid in the upper liquid chamber 2 and the lower liquid chamber 3 smoother by opening a plurality of flow channels 4 in the middle support 11 plate.

[0028] The lower mounting plate 7 is annular and the inner end is inserted into the rubber main spring 1; the lower mounting plate 7 is vulcanized and connected to the rubber main spring 1, so that the lower mounting plate 7 and the rubber main spring 1 form a whole, and by inserting the inner end of the lower mounting plate 7 into the rubber main spring 1, the connection between the lower mounting plate 7 and the rubber main spring 1 is made more secure.

[0029] The upper mounting plate 5 and the bottom support plate 6 are respectively connected to the rubber main spring 1 by vulcanization.

[0030] The working principle of the utility model is as follows: when the cab vibrates vertically downward relative to the frame, the cab drives the upper mounting plate 5 to move downward, the rubber main spring 1 is compressed on the upper side of the lower mounting plate 7, and the liquid in the upper liquid chamber 2 moves to the lower liquid chamber 3 through the flow channel 4 in the middle support 11. When the fluid passes through the flow channel 4, damping is generated to attenuate the vibration.

[0031] When the cab vibrates vertically upward relative to the frame, the cab drives the upper mounting plate 5 to move upward. Since the upper mounting plate 5 is connected to the bottom support plate 6 by fixing bolts 9 and fixing nuts 10, the upper mounting plate 5 drives the bottom support plate 6 to move upward. The rubber main spring 1 is compressed at the lower side of the lower mounting plate 7, and the liquid in the lower liquid chamber 3 moves to the upper liquid chamber 2 through the flow channel 4 in the middle support 11. When the fluid passes through the flow channel 4, damping is generated to attenuate the vibration.

Claims

1. A hydraulic suspension for a cab, characterized in that: The invention comprises a rubber main spring (1), wherein an upper liquid chamber (2) and a lower liquid chamber (3) are respectively provided on the upper and lower sides of the rubber main spring (1), and a flow channel (4) connecting the upper liquid chamber (2) and the lower liquid chamber (3) is also provided in the rubber main spring (1); an upper mounting plate (5) is installed on the top of the rubber main spring (1), a bottom support plate (6) connected to the upper mounting plate (5) is installed on the bottom of the rubber main spring (1), and a lower mounting plate (7) is installed between the upper liquid chamber (2) and the lower liquid chamber (3) of the rubber main spring (1), and the lower mounting plate (7) is inserted into the rubber main spring (1).

2. The hydraulic suspension of the cab according to claim 1, characterized in that: The top surface of the rubber main spring (1) is provided with a connection hole (8), a fixing bolt (9) passes through the connection hole (8), the upper mounting plate (5) and the bottom support plate (6) are respectively provided with through holes for the fixing bolt (9) to pass through, a fixing nut (10) is installed on the fixing bolt (9), and the upper mounting plate (5) and the bottom support plate (6) are connected via the fixing bolt (9) and the fixing nut (10).

3. The hydraulic suspension of the cab according to claim 1, characterized in that: An intermediate support (11) is installed in the rubber main spring (1), and the flow channel (4) is opened in the intermediate support (11).

4. The hydraulic suspension of the cab according to claim 3, characterized in that: The intermediate support (11) is cylindrical, and a plurality of flow channels (4) are arranged in the intermediate support (11) at intervals along the circumferential direction; the upper side of the flow channel (4) is connected to the upper liquid chamber (2) via an upper connecting port (12), and the lower side of the flow channel (4) is connected to the lower liquid chamber (3) via a lower connecting port (13); the upper liquid chamber (2) and the lower liquid chamber (3) are both annular.

5. The hydraulic suspension of the cab according to claim 3, characterized in that: The intermediate support (11) is vulcanized and connected to the rubber main spring (1).

6. The hydraulic suspension of the cab according to claim 1, characterized in that: An upper mounting hole (14) is provided on the upper mounting plate (5).

7. The hydraulic suspension of the cab according to claim 1, characterized in that: The lower mounting plate (7) is provided with a lower mounting hole (15) on the outside of the rubber main spring (1).

8. The hydraulic suspension of the cab according to claim 1, characterized in that: The rubber main spring (1) is cylindrical, the lower mounting plate (7) is annular and has an inner end inserted into the rubber main spring (1); the lower mounting plate (7) is vulcanized and connected to the rubber main spring (1).

9. The hydraulic cab mount according to any one of claims 1 to 8, characterized in that: The upper mounting plate (5) and the bottom support plate (6) are respectively connected to the rubber main spring (1) by vulcanization.

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