Suspension device for a cab and working machine

Abstract

The application relates to the technical field of engineering machinery, and provides a suspension device for a cab and a working machine, wherein the suspension device for the cab comprises a front suspension assembly and a rear suspension assembly; the front suspension assembly comprises a first damping member arranged between the front end of the cab and a frame, and the first damping member is arranged to be capable of damping in the height direction of the cab; the rear suspension assembly comprises a second damping member arranged between the rear end of the cab and the frame; the cab is rotatably connected with the frame around a connecting shaft, the axis of the connecting shaft is parallel to the transverse direction of the cab, and the second damping member comprises a first damping part capable of damping in the axial direction of the connecting shaft and a second damping part capable of damping in the radial direction of the connecting shaft. In this way, the problem of poor damping effect of the suspension device for the cab in the prior art is solved.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, and in particular to a suspension device for a driver's cab and a working machine. Background Technology

[0002] With the diversified application and development of construction machinery, the structure of construction machinery is becoming more refined, user-friendly, and convenient for operation and maintenance. For example, taking skid steer loaders as an example, current skid steer loaders have a suspension device between the cab and the frame to improve the comfort of the cab.

[0003] Existing suspension systems typically include multiple shock absorbers, each positioned at a different support location on the vehicle frame. The damping effect of these shock absorbers relies on rubber pads, which can only withstand compression, not tension. This results in a damping effect only when the cab moves downwards, leading to a limited damping capability, poor vibration isolation, and low driving comfort.

[0004] Therefore, how to solve the problem of poor shock absorption effect of the suspension device used in the cab in the prior art has become an important technical problem to be solved by those skilled in the art. Summary of the Invention

[0005] This invention provides a suspension device for a driver's cab and a working machine to solve the defect of poor shock absorption effect of the suspension device for the driver's cab in the prior art.

[0006] This invention provides a suspension device for a driver's cab, comprising:

[0007] The front suspension assembly includes a first shock absorber disposed between the front end of the cab and the vehicle frame, and the first shock absorber is configured to absorb shocks along the height direction of the cab.

[0008] The rear suspension assembly includes a second shock absorber disposed between the rear end of the cab and the frame. The cab is rotatably connected to the frame about a connecting shaft, the axis of which is parallel to the transverse direction of the cab. The second shock absorber includes a first shock absorber capable of damping along the axial direction of the connecting shaft and a second shock absorber capable of damping along the radial direction of the connecting shaft.

[0009] According to a suspension device for a driver's cab provided by the present invention, the front suspension assembly further includes:

[0010] Connectors;

[0011] The first support plate is used to connect to the vehicle frame;

[0012] The first shock absorber includes:

[0013] At least two shock-absorbing pads are provided, each of which is distributed on both sides of the first support plate along the height direction of the cab. The connector is configured to connect each of the shock-absorbing pads and the first support plate to the cab.

[0014] According to a suspension device for a driver's cab provided by the present invention, the rear suspension assembly further includes:

[0015] The second support plate is used to connect to the vehicle frame. The second support plate is perpendicular to the transverse direction of the cab. The second support plate is provided with a first mounting hole for the connecting shaft to pass through.

[0016] The third support plate is used to connect to the rear end of the cab. The third support plate is perpendicular to the transverse direction of the cab. The third support plate is provided with a second mounting hole for the connecting shaft to pass through.

[0017] The first shock absorber is disposed between the second support plate and the third support plate, and the second shock absorber is disposed between the connecting shaft and the side wall of the first mounting hole and / or between the connecting shaft and the side wall of the second mounting hole.

[0018] According to the present invention, a suspension device for a driver's cab is provided, wherein the first shock absorber is disposed at one end of the second shock absorber, and the first shock absorber and the second shock absorber are connected as an integral structure.

[0019] According to the present invention, a suspension device for a cab is provided, wherein the rear suspension assembly is provided in two sets, and the two sets of the rear suspension assembly are distributed laterally along the cab.

[0020] The first damping portion of any group of rear suspension components is located on the side of the second damping portion away from the other group of rear suspension components, or the first damping portion of any group of rear suspension components is located on the side of the second damping portion closer to the other group of rear suspension components.

[0021] According to a suspension device for a driver's cab provided by the present invention, the second shock absorber further includes:

[0022] The first rigid part is disposed on the side of the first damping part close to the second damping part or on the side of the first damping part away from the second damping part;

[0023] The second rigid part is disposed on the side of the second damping part facing the connecting shaft.

[0024] According to the present invention, a suspension device for a cab is provided, wherein the first shock absorber is detachably connected to the vehicle frame, and / or the first shock absorber is detachably connected to the cab.

[0025] According to a suspension device for a cab provided by the present invention, a locking assembly is provided on the second support plate and the third support plate. The locking assembly is configured to restrict the rotation of the cab relative to the frame when at least one of the frame and the cab is disconnected from the first shock absorber and the cab rotates relative to the frame to a target position.

[0026] According to the present invention, a suspension device for a driver's cab includes a locking assembly comprising:

[0027] A first connecting hole is provided on the second support plate;

[0028] The second connecting hole is provided on the third support plate. When the cab is rotated relative to the frame to the target position, the first connecting hole and the second connecting hole are directly opposite each other.

[0029] The fastener is capable of passing through both the first connecting hole and the second connecting hole.

[0030] The present invention also provides a working machine, including the above-described suspension device for the cab.

[0031] The present invention provides a suspension device for a cab, comprising a front suspension assembly and a rear suspension assembly. The front suspension assembly includes a first shock absorber disposed between the front end of the cab and the vehicle frame, for shock absorption along the height direction of the cab. The rear suspension assembly includes a second shock absorber disposed between the rear end of the cab and the vehicle frame. The cab is rotatably connected to the vehicle frame about a connecting shaft, the axis of which is parallel to the transverse direction of the cab. The second shock absorber includes a first shock absorber portion and a second shock absorber portion. The first shock absorber portion is used for shock absorption along the axial direction of the connecting shaft, and the second shock absorber portion is used for shock absorption along the radial direction of the connecting shaft. The radial direction of the connecting shaft includes not only the longitudinal direction and the height direction of the cab, but also a direction inclined relative to both the height direction and the longitudinal direction of the cab. That is, the suspension device for a cab provided by the present invention can absorb shocks not only along the height direction, the front-rear direction, and the left-right direction of the cab, but also along a direction inclined relative to both the height direction and the front-rear direction of the cab. This configuration, with different shock absorbers between the cab and the frame, and shock absorption in different directions, improves the shock absorption effect and driving comfort, solving the problem of poor shock absorption effect of the suspension devices used for the cab in the prior art.

[0032] The two shock absorbers work together to enable the front suspension assembly to absorb shocks in both vertical and horizontal directions.

[0033] The connecting shaft passes through the second and third support plates, and the first damping part is disposed between the second and third support plates, enabling the rear suspension assembly to dampen vibrations in the left and right directions. The second damping part is disposed between the connecting shaft and the side wall of the first mounting hole and / or between the connecting shaft and the side wall of the second mounting hole, allowing vibration damping to occur in any direction perpendicular to the axis of the connecting shaft.

[0034] The first shock absorber is detachably connected to the frame and cab, allowing the cab to rotate relative to the frame around the connecting shaft during maintenance, facilitating inspection and repair of the structure located beneath the cab. The locking assembly allows for easy fixation of the cab's position.

[0035] Furthermore, the operating machinery provided by the present invention also possesses the various advantages described above due to the suspension device for the cab as described above. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the structure of the suspension device for the driver's cab provided by the present invention when it is connected to the driver's cab and the vehicle frame;

[0038] Figure 2 This is a schematic diagram of the suspension device for the driver's cab provided by the present invention;

[0039] Figure 3 This is an exploded view of the front suspension assembly provided by the present invention;

[0040] Figure 4 This is an exploded view of the rear suspension assembly provided by the present invention;

[0041] Figure 5 This is a schematic diagram of the structure of the second shock absorber provided by the present invention;

[0042] Figure 6 This is a cross-sectional view of the rear suspension assembly provided by the present invention.

[0043] Figure label:

[0044] 1. Front suspension assembly; 2. Cab; 3. Rear suspension assembly; 4. Second shock absorber; 5. First shock absorber; 6. Second shock absorber; 7. Connector; 8. First support plate; 9. Shock absorber pad; 10. Connecting shaft; 11. Second support plate; 12. Third support plate; 13. First rigid part; 14. Second rigid part; 15. First connecting hole; 16. Gasket; 17. Frame; 18. Connector. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0046] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0048] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] The following is combined with Figures 1 to 6 The present invention describes a suspension device for a driver's cab.

[0051] like Figures 1 to 6 As shown, the suspension device for the cab provided in this embodiment of the invention includes a front suspension assembly 1 and a rear suspension assembly 3. The front suspension assembly 1 is disposed between the front end of the cab 2 and the frame 17, and the rear suspension assembly 3 is disposed between the rear end of the cab 2 and the frame 17.

[0052] Specifically, the front suspension assembly 1 includes a first shock absorber, which is disposed between the front end of the cab 2 and the frame 17, and is used to dampen vibrations along the height direction of the cab 2.

[0053] The rear suspension assembly 3 includes a second shock absorber 4, which is disposed between the rear end of the cab 2 and the frame 17. The cab 2 is rotatably connected to the frame 17 about a connecting shaft 10, the axis of which is parallel to the transverse direction of the cab. The second shock absorber 4 includes a first shock absorber 5 and a second shock absorber 6. The first shock absorber 5 is used for axial damping along the connecting shaft 10, and the second shock absorber 6 is used for radial damping along the connecting shaft 10.

[0054] Of the three directions of cab 2—height, lateral, and longitudinal—any two are perpendicular to each other. The height direction of cab 2 is the vertical direction, as shown in the reference section. Figure 1 The z-direction indicates the direction; the lateral direction of cab 2 is the driver's left and right direction when driving, as referenced. Figure 1 The x-axis indicates the direction; the longitudinal direction of cab 2 is the driver's forward and backward direction when driving, as referenced. Figure 1 The direction indicated by y in the diagram.

[0055] The radial direction of the connecting shaft 10 includes not only the longitudinal direction and the height direction of the cab 2, but also the direction that is inclined relative to both the height direction and the longitudinal direction of the cab 2. In other words, the suspension device for the cab provided in this embodiment of the invention can dampen vibrations along the height direction, front-back direction and left-right direction of the cab 2, and can also dampen vibrations along the direction that is inclined relative to both the height direction and the front-back direction of the cab 2.

[0056] This configuration, with different shock absorbers installed between the cab 2 and the frame 17, and shock absorption in different directions, improves the shock absorption effect and driving comfort, solving the problem of poor shock absorption effect of the suspension device used for the cab in the prior art.

[0057] In this embodiment of the invention, the front suspension assembly 1 further includes a connector 7 and a first support plate 8, the first support plate 8 being used to connect to the vehicle frame 17.

[0058] The first shock absorber can be, but is not limited to, a shock absorber pad, a spring, etc.

[0059] When the first shock absorber is set as the shock absorber pad 9, the shock absorber pad 9 may be made of rubber material, but is not limited to.

[0060] At least two shock absorber pads 9 are provided, and each shock absorber pad 9 is distributed on both sides of the first support plate 8 along the height direction of the cab 2. The connector 7 connects each shock absorber pad 9 and the first support plate 8 to the cab 2.

[0061] A connecting plate is provided at the bottom of the front end of the cab 2. The connecting plate is located above all the shock absorbers 9. The connecting piece 7 passes through each shock absorber 9, the first support plate 8 and the connecting plate, and the two ends of the connecting piece 7 abut against the upper surface of the connecting plate and the lower surface of the shock absorber 9 located below the first support plate 8, respectively.

[0062] When the cab 2 vibrates upwards, the shock-absorbing pad 9 located below the first support plate 8 is compressed to absorb the vibration; when the cab 2 vibrates downwards, the shock-absorbing pad 9 located above the first support plate 8 is compressed to absorb the vibration. In other words, the front suspension assembly 1 can absorb vibration in both the vertical and horizontal directions.

[0063] In a specific embodiment, the connector 7 includes a first connecting bolt and a first connecting nut. The nut end of the first connecting bolt and the first connecting nut abut against the lower surface of the shock-absorbing pad 9 located below the first support plate 8 and the upper surface of the connecting plate, respectively. To ensure that the nut end of the first connecting bolt and the first connecting nut can effectively abut against the lower surface of the shock-absorbing pad 9 located below the first support plate 8 and the upper surface of the connecting plate, a washer 16 can be provided at the nut end of the first connecting bolt and a washer 16 can be provided on the side of the first connecting nut near the connecting plate.

[0064] At least two front suspension components 1 can be installed between the front end of the cab 2 and the frame 17, with each front suspension component 1 distributed at lateral intervals along the cab 2, which can further improve the shock absorption effect.

[0065] In this embodiment of the invention, the rear suspension assembly 3 further includes a second support plate 11 and a third support plate 12, wherein the second support plate 11 is used to connect to the frame 17, the third support plate 12 is used to connect to the rear end of the cab 2, and the connecting shaft 10 is used to connect the second shock absorber 4, the first support plate 8 and the second support plate 11 together.

[0066] The third support plate 12, serving as the connecting part 18 at the rear end of the cab 2 for connection with the frame 17, can also be made into a cylindrical structure, as shown in the reference. Figure 4 .

[0067] The second support plate 11 is perpendicular to the transverse direction of the cab 2, and a first mounting hole is provided on the second support plate 11 for the connecting shaft 10 to pass through the second support plate 11. The third support plate 12 is perpendicular to the transverse direction of the cab 2, and a second mounting hole is provided on the third support plate 12 for the connecting shaft 10 to pass through the third support plate 12.

[0068] After the connecting shaft 10 passes through the second support plate 11 and the third support plate 12, the first shock absorber 5 is disposed between the second support plate 11 and the third support plate 12. Through the interaction between the end of the second support plate 11 and the end of the first shock absorber 5 and / or the interaction between the end of the third support plate 12 and the end of the first shock absorber 5, shock absorption can be performed along the lateral direction of the cab 2.

[0069] The second damping part 6 is disposed between the connecting shaft 10 and the side wall of the first mounting hole and / or between the connecting shaft 10 and the side wall of the second mounting hole.

[0070] The second shock absorber 6 can be configured as a hollow cylinder, sleeved on the outside of the connecting shaft 10 and located inside the first mounting hole and / or the second mounting hole. The axis of the connecting shaft 10 extends laterally along the cab 2. Through the interaction between the second support plate 11 and the outer side of the second shock absorber 6, and / or the interaction between the third support plate 12 and the outer side of the second shock absorber 6, and / or the interaction between the connecting shaft 10 and the inner side of the second shock absorber 6, shock absorption can be performed along the height direction of the cab 2, along the front-rear direction of the cab 2, and also along a direction inclined relative to both the height direction and the front-rear direction of the cab 2.

[0071] In a specific embodiment, a second connecting bolt can be selected as the connecting shaft 10, and a second connecting nut can be provided on the second connecting bolt. The nut end of the second connecting bolt and the second connecting nut respectively abut against the surfaces of the second support plate 11 and the third support plate 12 that are far apart.

[0072] In some embodiments, the second support plates 11 are arranged in pairs, with a third support plate 12 corresponding to a pair of second support plates 11, and the third support plate 12 is located between the pair of second support plates 11. Both ends of the connecting shaft 10 pass through the pair of second support plates 11, and the pair of second support plates 11 jointly support the connecting shaft 10, improving the stability of the connecting shaft 10. At this time, the nut end of the second connecting bolt and the second connecting nut respectively abut against the distant surfaces of the pair of second support plates 11.

[0073] In some embodiments, a first damping part 5 is provided between each second support plate 11 and the third support plate 12, so that a rear suspension assembly 3 can provide damping in both left and right directions.

[0074] In other embodiments, the first damping part 5 is provided only between one of the second support plates 11 and the third support plate 12. In this case, the first damping part 5 is provided at one end of the second damping part 6, and the first damping part 5 and the second damping part 6 can be connected into an integral structure. Specifically, the first damping part 5 and the second damping part 6 can be integrally formed.

[0075] When the first damping part 5 is provided only between one of the second support plates 11 and the third support plate 12, two sets of rear suspension assemblies 3 can be provided, with the two sets of rear suspension assemblies 3 distributed laterally along the cab 2. Furthermore, the first damping part 5 of any set of rear suspension assemblies 3 is located on the side of the second damping part 6 away from the other set of rear suspension assemblies 3, or the first damping part 5 of any set of rear suspension assemblies 3 is located on the side of the second damping part 6 closer to the other set of rear suspension assemblies 3. Moreover, it is necessary to ensure that the distance between the second support plate 11 of any set of rear suspension assemblies 3 that does not interact with the first damping part 5 and the corresponding third support plate 12 is greater than the limit compression amount of the first damping part 5 of the other set of rear suspension assemblies 3, so as to ensure that each first damping part 5 can effectively provide shock absorption.

[0076] In other words, the second shock absorbers 4 of the two sets of rear suspension components 3 are set in opposite directions, referring to... Figure 6 When the cab 2 vibrates to the left, the first shock absorber 5 on the right side is compressed to absorb the vibration; when the cab 2 vibrates to the right, the first shock absorber 5 on the left side is compressed to absorb the vibration. In other words, the two sets of rear suspension components 3 need to cooperate to absorb vibration in both directions.

[0077] The first damping part 5 and the second damping part 6 mentioned above may be made of rubber, but are not limited to rubber.

[0078] In this embodiment of the invention, the second shock absorber 4 further includes a first rigid part 13 and a second rigid part 14.

[0079] The first rigid part 13 is disposed on the side of the first damping part 5 near the second damping part 6 or on the side of the first damping part 5 away from the second damping part 6, and is used to provide rigid support for the first damping part 5. Specifically, the first rigid part 13 can be configured as a ring-shaped sheet structure, and the sheet structure can be disposed on the side of the first damping part 5 away from the second damping part 6, and fixedly connected to the first damping part 5.

[0080] The second rigid part 14 is disposed on the side of the second damping part 6 facing the connecting shaft 10, and is used to provide rigid support for the second damping part 6. Specifically, the second rigid part 14 can be configured as a hollow cylinder, disposed inside the second damping part 6, and fixedly connected to the second damping part 6.

[0081] In this embodiment, the first shock absorber is detachably connected to the frame 17, and / or the first shock absorber is detachably connected to the cab 2. Specifically, if the first connecting bolt and the first connecting nut are selected as the connecting parts 7, the connection can be made by removing the first connecting bolt and the first connecting nut.

[0082] The connecting shaft 10 serves as the hinge shaft between the second support plate 11 and the third support plate 12. After the first shock absorber is disconnected from the frame 17 or the first shock absorber is disconnected from the cab 2, the cab 2 can rotate relative to the frame 17 around the connecting shaft 10, which facilitates the inspection and maintenance of the structure located below the cab 2.

[0083] At this point, it is necessary to make the axes of the connecting shafts 10 of each rear suspension assembly 3 coincide.

[0084] In a further embodiment, locking components are provided on the second support plate 11 and the third support plate 12 to restrict the rotation of the cab 2 relative to the frame 17 when at least one of the frame 17 and the cab 2 is disengaged from the first shock absorber and the cab 2 rotates relative to the frame 17 to a target position. When it is necessary to inspect or repair the structure below the cab 2, the cab 2 can be rotated from the target position, and the cab 2 is fixed at the target position by the locking components.

[0085] The aforementioned target position is the position where the load-bearing surface of the cab 2 is tilted relative to the load-bearing surface of the frame 17.

[0086] In a specific embodiment, the locking component includes a first connecting hole 15, a second connecting hole, and a fastener.

[0087] The first connecting hole 15 is provided on the second support plate 11, and the second connecting hole is provided on the third support plate 12. When the cab 2 rotates relative to the frame 17 to the target position, the first connecting hole 15 and the second connecting hole are directly opposite each other. At this time, fasteners can be used to pass through the first connecting hole 15 and the second connecting hole to fix the second support plate 11 and the third support plate 12 together.

[0088] Fasteners may include, but are not limited to, pins or connecting bolts.

[0089] In summary, the suspension device for the driver's cab provided by the embodiments of the present invention has the advantages of good buffering and vibration isolation effect, simple structure, and low manufacturing cost.

[0090] On the other hand, embodiments of the present invention also provide a working machine, including the suspension device for the cab provided in any of the above embodiments. The suspension device for the cab provided in the above embodiments has a strong shock absorption effect, which is beneficial to improving driving comfort. Therefore, the working machine in this embodiment has excellent driving comfort. The derivation process of the beneficial effects of the working machine in the embodiments of the present invention is largely similar to the derivation process of the beneficial effects of the suspension device for the cab described above, so it will not be repeated here.

[0091] In embodiments of the present invention, the type of operating machinery is not limited; for example, the operating machinery may be a skid steer loader, a vibratory roller, etc. In other words, as long as the operating machinery can use the suspension device for the cab in the embodiments of the present invention, it is acceptable.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A suspension device for a driver's cab, characterized in that, include: The front suspension assembly includes a first shock absorber disposed between the front end of the cab and the vehicle frame, and the first shock absorber is configured to absorb shocks along the height direction of the cab. The rear suspension assembly includes a second shock absorber disposed between the rear end of the cab and the vehicle frame. The cab is rotatably connected to the vehicle frame about a connecting shaft, the axis of which is parallel to the transverse direction of the cab. The second shock absorber includes a first shock absorber capable of damping along the axial direction of the connecting shaft and a second shock absorber capable of damping along the radial direction of the connecting shaft. The first shock absorber is disposed at one end of the second shock absorber and the first shock absorber is integrated with the second shock absorber. The second shock absorber also includes a first rigid part and a second rigid part. The first rigid part is disposed on the side of the first shock absorber close to the second shock absorber or on the side of the first shock absorber away from the second shock absorber. The second rigid part is disposed on the side of the second shock absorber facing the connecting shaft. The rear suspension assembly also includes: The second support plate is used to connect to the vehicle frame. The second support plate is perpendicular to the transverse direction of the cab. The second support plate is provided with a first mounting hole for the connecting shaft to pass through. The third support plate is used to connect to the rear end of the cab. The third support plate is perpendicular to the transverse direction of the cab. The third support plate is provided with a second mounting hole for the connecting shaft to pass through. The first shock absorber is disposed between the second support plate and the third support plate, and the second shock absorber is disposed between the connecting shaft and the side wall of the first mounting hole and / or between the connecting shaft and the side wall of the second mounting hole.

2. The suspension device for the driver's cab according to claim 1, characterized in that, The front suspension assembly also includes: Connectors; The first support plate is used to connect to the vehicle frame; The first shock absorber includes: At least two shock-absorbing pads are provided, each of which is distributed on both sides of the first support plate along the height direction of the cab. The connector is configured to connect each of the shock-absorbing pads and the first support plate to the cab.

3. The suspension device for the driver's cab according to claim 1, characterized in that, The rear suspension assembly is provided in two sets, and the two sets of the rear suspension assembly are distributed laterally along the cab; The first damping portion of any group of rear suspension components is located on the side of the second damping portion away from the other group of rear suspension components, or the first damping portion of any group of rear suspension components is located on the side of the second damping portion closer to the other group of rear suspension components.

4. The suspension device for the driver's cab according to claim 1, characterized in that, The first shock absorber is detachably connected to the vehicle frame, and / or the first shock absorber is detachably connected to the cab.

5. The suspension device for a driver's cab according to claim 4, characterized in that, The second support plate and the third support plate are provided with locking components, which are configured to restrict the rotation of the cab relative to the frame when the cab is disengaged from the first shock absorber and the cab rotates relative to the frame to a target position.

6. The suspension device for a driver's cab according to claim 5, characterized in that, The locking component includes: A first connecting hole is provided on the second support plate; The second connecting hole is provided on the third support plate. When the cab is rotated relative to the frame to the target position, the first connecting hole and the second connecting hole are directly opposite each other. The fastener is capable of passing through both the first connecting hole and the second connecting hole.

7. A type of operating machinery, characterized in that, Includes the suspension device for the driver's cab as described in any one of claims 1 to 6.

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