Cab supporting system and engineering vehicle

Abstract

The invention relates to the technical field of engineering vehicles, and particularly provides a cab supporting system and an engineering vehicle. The cab supporting system comprises a frame, a cab and a supporting mechanism. The cab is rotatably connected to the frame; the supporting mechanism comprises a main body part as well as a first end structure and a second end structure which are respectively arranged at two ends of the main body part, the first end structure is connected to the frame, and the second end structure is connected to the cab; the main body part is telescopically arranged and supports the cab to rotate relative to the frame; the first end structure and / or the second end structure are / is provided with vibration isolation pieces. According to the invention, the main body part is telescopically arranged and can support the cab to turn over relative to the frame; in addition, at least one of the first end structure and the second end structure arranged at the two ends of the main body part is provided with the vibration isolation piece, so that transmission of vibration of the frame to a cab can be effectively attenuated, noise beside ears is remarkably reduced, and driving and riding comfort is improved.

Description

Technical Field

[0001] This application relates to the technical field of engineering vehicles, and specifically proposes a cab support system and an engineering vehicle. Background Technology

[0002] In related technologies, the hydraulic system of some engineering vehicles is located under the cab, and in order to facilitate the maintenance and repair of the hydraulic system, the cab is designed to be tiltable.

[0003] Specifically, the cab can be opened and closed by rotating around a pivot point using a gas spring support, with the gas spring connecting the frame and the cab. However, during operation, the vibration of the frame is transmitted to the cab via the gas spring, resulting in loud noise for the driver and passengers, affecting the user experience. Summary of the Invention

[0004] The purpose of this application is to at least solve the technical problem of "excessive noise near the ears of drivers and passengers" mentioned above, and this purpose is achieved through the following technical solution: In a first aspect, this application proposes a cab support system, which includes a frame, a cab, and a support mechanism; the cab is rotatably connected to the frame; the support mechanism includes a main body and a first end structure and a second end structure respectively disposed at both ends of the main body, the first end structure being connected to the frame and the second end structure being connected to the cab; the main body is telescopically configured to support the cab to rotate relative to the frame; the first end structure and / or the second end structure are provided with vibration isolation components.

[0005] In some embodiments, a locking assembly is also included; in a first operating condition, the cab is close to the frame, and the locking assembly secures the cab to the frame; the frame includes a first plate, and the cab includes a second plate; the locking assembly also includes a shock absorber, a first bolt, a first nut, a first washer, and a second washer, the first bolt passing sequentially through the first washer, at least a portion of the structure of the shock absorber, the first plate, the second plate, and the second washer, and engaging with the first nut to lock it in place.

[0006] In some embodiments, the locking assembly further includes a reinforcing plate sleeved on the first bolt, the reinforcing plate being connected to the side of the first plate facing away from the second plate; the damping component includes a first sub-dampening component and a second sub-dampening component sleeved on the bolt, the first sub-dampening component being disposed between the reinforcing plate and the first pad, and the second sub-dampening component being disposed between the reinforcing plate and the second plate.

[0007] In some embodiments, the first pad is fixedly connected to the first bolt, and the first pad also has a first opening spaced apart from the first bolt; the locking assembly further includes a limiting member that passes through the first opening and is connected to the reinforcing plate.

[0008] In some embodiments, a limiting structure is provided at the end of the limiting member facing away from the reinforcing plate, and the limiting structure restricts the first pad from disengaging from the limiting member in a direction away from the reinforcing plate.

[0009] In some embodiments, the limiting member has a screw hole at one end facing away from the reinforcing plate, and the limiting structure includes a second bolt and a third washer. The second bolt passes through the third washer and is locked with the screw hole, and the third washer can support the first washer. Alternatively, the limiting member has a through hole in the radial direction, and the limiting structure includes a pin. The pin passes through the through hole and can support the first washer.

[0010] In some embodiments, the locking assembly further includes a fourth washer and a second nut sleeved on the first bolt, the fourth washer being disposed between the second sub-damping member and the second plate; the second nut being disposed between the fourth washer and the second washer; and / or, a buffer layer is provided between the first plate and the second plate.

[0011] In some embodiments, the frame includes a first plate; the vibration isolator includes a first sub-vibration isolator and a second sub-vibration isolator; the first end structure includes a first bracket, a third bolt and a third nut, and the main body is rotatably connected to the first bracket; the vibration isolator further includes a fifth partition, and the third bolt passes through the first bracket, the first sub-vibration isolator, the fifth partition, the first plate and the second sub-vibration isolator in sequence and is locked with the third nut; or, the third bolt passes through the first sub-vibration isolator, the first bracket, the second sub-vibration isolator and the first plate in sequence and is locked with the third nut.

[0012] In some embodiments, a reinforcing sleeve is provided at the opening of the first sub-vibration isolator and / or the second sub-vibration isolator, and the reinforcing sleeve is fitted onto the third bolt.

[0013] Secondly, this application proposes an engineering vehicle that includes the cab support system of the first aspect.

[0014] The technical solution proposed in this application has at least the following technical effects: In this application, the main body is telescopically oriented to support the cab to tilt relative to the frame; in addition, at least one of the first end structure and the second end structure located at both ends of the main body is provided with vibration damping components, thereby effectively attenuating the transmission of frame vibration to the cab, significantly reducing ambient noise and improving driving comfort. Attached Figure Description

[0015] To better integrate the content illustrated in the accompanying drawings with the description of the specific embodiments, a brief introduction to the drawings is provided below. It is understood that the accompanying drawings mentioned below are merely schematic illustrations of some embodiments of the relevant technical solutions and the technical solutions of this application. Without creative effort, those skilled in the art can create drawings illustrating other embodiments.

[0016] Specifically, the annotations for the accompanying drawings are as follows: Figure 1 This is a side view of the cab support system described in some embodiments of this application under a first operating condition; Figure 2 This is an axonometric schematic diagram of the cab support system described in some embodiments of this application under a second operating condition; Figure 3 This is an isometric schematic diagram of the locking component described in some embodiments of this application; Figure 4 This is a cross-sectional schematic diagram of a locking component described in some embodiments of this application; Figure 5 This is a partial structural diagram of the locking component described in some embodiments of this application; Figure 6 This is a cross-sectional schematic diagram of the first end structure described in some embodiments of this application; Figure 7 This is a schematic diagram of the second end structure described in some embodiments of this application; Figure 8 This is a structural schematic diagram of the first sub-vibration isolation member described in some embodiments of this application; Figure 9 This is a structural schematic diagram of the second sub-vibration isolator described in some embodiments of this application.

[0017] Specifically, the annotations for the figure marks in the instruction manual are as follows: 10. Chassis; 11. First Plate; 12. Buffer Layer; 20. Cab; 21. Second Plate; 22. Axle; 30. Support Mechanism; 31. Main Body; 32. First End Structure; 321. Vibration Isolator; 3211. First Sub-Vibration Isolator; 3212. Second Sub-Vibration Isolator; 3213. Fifth Partition; 3214. Assembly Hole; 3215. Protrusion; 322. First Bracket; 323. Third Bolt; 324. Third Bolt 325. Reinforcing sleeve; 33. Second end structure; 331. Second bracket; 40. Locking assembly; 41. First bolt; 42. First nut; 43. First pad; 431. First opening; 44. Second pad; 45. Reinforcing plate; 46. Shock absorber; 461. First sub-shock absorber; 462. Second sub-shock absorber; 47. Limiting component; 48. Second bolt; 49. Third pad; 50. Fourth pad; 51. Second nut. Detailed Implementation

[0018] To make the embodiments of this application clearer, they will be described below in conjunction with the accompanying drawings. It should be understood that the content mentioned below represents only some embodiments of this application, and not all embodiments are listed exhaustively. Therefore, other embodiments that can be obtained based on the following embodiments without any inventive effort fall within the protection scope of this application.

[0019] It should be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to impose strict limitations on the technical solutions unless the context clearly indicates otherwise. For example, the use of "a," "an," and "the" to modify a feature does not preclude the possibility that the feature may be plural in other embodiments.

[0020] It should be understood that the terms "comprising," "including," and "having" are open-ended, indicating the presence of the stated features but not excluding the possibility of other features in the embodiment. Similarly, the use of terms such as "first," "second," etc., to describe multiple features only indicates the distinction between one feature and another, and such terms do not imply order or sequence unless explicitly stated in the context.

[0021] It should be understood that, unless the context clearly indicates otherwise, the terms "setup," "connection," and "installation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integrated connection; they can refer to a direct connection or an indirect connection via a medium. Those skilled in the art will understand the specific meaning of these terms in this document based on the specific circumstances.

[0022] In addition, for ease of description, the text will use terms of spatial relative relationship to describe the position of one feature relative to another feature, such as "inner", "outer", "end", "side", "upper", "middle", "lower", "high", "low", "axial", "circumferential", "radial", "horizontal", "vertical", "first direction", "second direction", etc. It can be understood that the spatial relative relationship between two features should include other specific situations besides those shown in the accompanying drawings of the specification.

[0023] The embodiments of this application are described below with reference to the accompanying drawings. It can be understood that the technical features involved in the different embodiments described below can be combined with each other as long as they do not conflict with each other.

[0024] Firstly, combining Figure 1 and Figure 2The embodiments of this application propose a cab support system, which includes a frame 10, a cab 20, and a support mechanism 30; the cab 20 is rotatably connected to the frame 10; the support mechanism 30 includes a main body 31 and a first end structure 32 and a second end structure 33 respectively disposed at both ends of the main body 31, the first end structure 32 is connected to the frame 10, and the second end structure 33 is connected to the cab 20; the main body 31 is telescopically configurable and supports the cab 20 to rotate relative to the frame 10; the first end structure 32 and / or the second end structure 33 are provided with vibration damping members 321.

[0025] In this embodiment, the main body 31 is telescopically oriented and can support the cab 20 to rotate relative to the frame 10. In addition, at least one of the first end structure 32 and the second end structure 33 located at both ends of the main body 31 is provided with a vibration damping member 321, which can effectively attenuate the transmission of the vibration of the frame 10 to the cab 20, significantly reduce the noise around the ears, and improve the driving comfort.

[0026] In some embodiments, combined with Figures 1 to 4 It also includes a locking component 40; in the first operating condition, the cab 20 is close to the frame 10, and the locking component 40 fixes the cab 20 and the frame 10; the locking component 40 includes a shock absorber 46.

[0027] In this embodiment, refer to Figure 1 and Figure 4 In the first operating condition, i.e., the normal use state of the engineering vehicle, the main body 31 retracts, and the cab 20 rotates towards the frame 10 until it abuts against the frame 10; the locking assembly 40 fixes the cab 20 to the frame 10, thereby ensuring the stability of the cab 20 and preventing abnormal noises and additional vibrations caused by shaking during driving. In addition, the shock absorber 46 is integrated into the locking assembly 40, which can absorb and dissipate residual vibration energy in the locked state, playing a "flexible locking" role and avoiding noise and impact caused by rigid connection.

[0028] It should be noted that, referring to Figure 2 In the second operating condition, the locking component 40 is unlocked, and the cab 20 rotates away from the frame 10, forming an angle between them to expose the hydraulic system at the bottom of the cab 20 for easy maintenance.

[0029] It should be noted that, referring to Figure 1 and Figure 2 The cab 20 and the frame 10 rotate via a pivot 22.

[0030] In some embodiments, refer to Figure 3 and Figure 4The frame 10 includes a first plate 11, and the cab 20 includes a second plate 21. The locking assembly 40 also includes a first bolt 41, a first nut 42, a first washer 43, and a second washer 44. The first bolt 41 passes through the first washer 43, at least part of the structure of the shock absorber 46, the first plate 11, the second plate 21, and the second washer 44 in sequence and is locked in place with the first nut 42.

[0031] In this embodiment, the damping component 46 is reliably clamped between the plates to ensure its vibration isolation function is stable; moreover, the bolt preload is evenly distributed through multiple layers of pads to avoid stress concentration and improve connection strength and durability; this embodiment uses standard parts for connection, which is convenient for design, manufacturing and on-site assembly and maintenance.

[0032] In some embodiments, refer to Figure 4 The locking assembly 40 also includes a reinforcing plate 45 sleeved on the first bolt 41, the reinforcing plate 45 being connected to the side of the first plate 11 facing away from the second plate 21; the shock absorber 46 includes a first sub-shock absorber 461 and a second sub-shock absorber 462 sleeved on the bolt, the first sub-shock absorber 461 being disposed between the reinforcing plate 45 and the first pad 43, and the second sub-shock absorber 462 being disposed between the reinforcing plate 45 and the second plate 21.

[0033] In this embodiment, the design of the dual damping components 46 can significantly improve the local stiffness and bending resistance of the first plate 11 on the frame 10 in the bolt connection area, preventing it from fatigue deformation due to repeated vibration; it also makes the force on each damping component 46 more uniform, improving its vibration isolation efficiency and durability; at the same time, it can ensure that the locking assembly 40 can still provide a stable and reliable locking force after long-term use.

[0034] Optionally, the first sub-damping element 461 and the second sub-damping element 462 are dampers with elastic elements.

[0035] It should be noted that, referring to Figure 4 The first sub-damping component 461 and the second sub-damping component 462 are symmetrically arranged, forming an assembly gap between them. The reinforcing plate 45 is located in the assembly gap and is positioned securely.

[0036] In some embodiments, refer to Figures 3 to 5 The first pad 43 is fixedly connected to the first bolt 41, and the first pad 43 also has a first opening 431 spaced apart from the first bolt 41; the locking assembly 40 also includes a limiting member 47, which passes through the first opening 431 and is connected to the reinforcing plate 45.

[0037] In this embodiment, the limiting member 47 and the reinforcing plate 45 form a "stopping" structure, which is fixedly connected to the first bolt 41. This effectively prevents the first nut 42 from rotating the first bolt 41 when the locking component 40 needs to be unlocked, thus preventing the locking component 40 from being locked. At the same time, it can prevent the first pad 43 from circumferentially moving under vibration, thus preventing the loss of preload.

[0038] Optionally, the first pad 43 is welded to the first bolt 41; the limiting member 47 is welded to the reinforcing plate 45, and the reinforcing plate 45 is welded to the first plate 11.

[0039] In some embodiments, the end of the limiting member 47 facing away from the reinforcing plate 45 is provided with a limiting structure, which restricts the first pad 43 from disengaging from the limiting member 47 in a direction away from the reinforcing plate 45.

[0040] Specifically, refer to Figure 5 The first bolt 41 and the first washer 43 are connected as one piece, as shown in the reference. Figure 4 After the first nut 42 and the second nut 51 are both unscrewed, the limiting structure can limit the first pad 43 to prevent the first bolt 41 and the first pad 43 from falling directly.

[0041] In some embodiments, refer to Figure 3 and Figure 4 The limiting member 47 has a screw hole at one end facing away from the reinforcing plate 45. The limiting structure also includes a second bolt 48 and a third pad 49. The second bolt 48 passes through the third pad 49 and is locked with the screw hole. The third pad 49 can support the first pad 43.

[0042] In this embodiment, the third pad 49 is fixed to the limiting member 47 by the second bolt 48 to prevent the first pad 43 from detaching from the end of the limiting member 47 away from the reinforcing plate 45, thereby limiting the first pad 43; the limiting member 47 prevents the first pad 43 from rotating, that is, prevents the first bolt 41 from rotating, so that the first nut 42 and the subsequent second nut 51 can be easily unscrewed.

[0043] Furthermore, the limiting member 47 allows the first pad 43 to vibrate axially between the reinforcing plate 45 and the third pad 49, avoiding stress concentration, while providing the necessary movement space for vibration damping, thus balancing locking reliability and mechanism flexibility. In addition, this embodiment uses the limiting member 47 as an additional connection point, simplifying the structure and reducing the number of parts.

[0044] Alternatively, in some embodiments not shown in the figures, the limiting member 47 is provided with a through hole in the radial direction, and the limiting structure includes a pin that passes through the through hole and can support the first pad 43.

[0045] In some embodiments, refer to Figure 4The locking assembly 40 also includes a fourth washer 50 and a second nut 51 sleeved on the first bolt 41. The fourth washer 50 is located between the second sub-shock absorber 462 and the second plate 21. The second nut 51 is located between the fourth washer 50 and the second washer 44. And / or, a buffer layer 12 is provided between the first plate 11 and the second plate 21.

[0046] In this embodiment, a fourth washer 50 and a second nut 51 are added to the first bolt 41 to form a double-nut anti-loosening structure, which can more reliably maintain the preload and prevent loosening.

[0047] Optionally, the first nut 42 and the second nut 51 are lock nuts.

[0048] In addition, the buffer layer 12 is provided between the first plate 11 and the second plate 21, which can form a "soft pad" between the plates to further absorb and attenuate high-frequency vibrations and impacts, and improve the vibration isolation effect.

[0049] It should be noted that the buffer layer 12 is disposed on the first plate 11; optionally, the buffer layer 12 is a sponge pad.

[0050] In some embodiments, refer to Figure 6 The frame 10 includes a first plate 11; the vibration isolator 321 includes a first sub-vibration isolator 3211, a second sub-vibration isolator 3212, and a fifth partition 3213 disposed between the two; the first end structure 32 includes a first bracket 322, a third bolt 323, and a third nut 324. The main body 31 is rotatably connected to the first bracket 322. The third bolt 323 passes through the first bracket 322, the first sub-vibration isolator 3211, the fifth partition 3213, the first plate 11, and the second sub-vibration isolator 3212 in sequence and is locked with the third nut 324.

[0051] In this embodiment, by arranging the first sub-vibration isolation member 3211 and the second sub-vibration isolation member 3212 on the third bolt 323, a bidirectional vibration isolation structure is formed, which can more comprehensively suppress vibration transmission.

[0052] Alternatively, in some embodiments not shown in the figures, the third bolt 323 passes sequentially through the first sub-vibration isolator 3211, the first bracket 322, the second sub-vibration isolator 3212 and the first plate 11 and is locked in place with the third nut 324, that is, both vibration isolators are located on the first plate 11, and part of the structure of the first bracket 322 is located between the two vibration isolators, which is also a preferred implementation.

[0053] It should be noted that, referring to Figure 7 The second end structure 33 includes a second bracket 331, which is connected to the cab 20, and the main body 31 is rotatably connected to the second bracket 331.

[0054] Understandably, the second end structure 33 may also be equipped with a vibration isolation element 321.

[0055] In some embodiments, refer to Figure 6 , Figure 8 and Figure 9 A reinforcing sleeve 325 is provided at the opening of the first sub-vibration isolator 3211 and / or the second sub-vibration isolator 3212, and the reinforcing sleeve 325 is fitted onto the third bolt 323.

[0056] In this embodiment, the reinforcing sleeve 325 isolates the vibration isolator 321 and the third bolt 323, protecting the vibration isolator 321 and preventing it from being crushed or cracked under the pre-tightening of the third bolt 323 and vibration, thus extending its service life. Moreover, it can ensure the fitting accuracy and force uniformity between the vibration isolator 321 and the third bolt 323, making the vibration isolation effect more stable and reliable.

[0057] It should be noted that, referring to Figure 6 , Figure 8 and Figure 9 The first sub-vibration isolator 3211 and the second sub-vibration isolator 3212 are provided with protrusions 3215 at the openings. The protrusions 3215 extend into the openings of the fifth partition 3213 and the first plate 11, and serve as positioning.

[0058] It should be noted that, referring to Figure 8 and Figure 9 The first sub-vibration isolator 3211 and the second sub-vibration isolator 3212 have multiple holes and can be used with multiple third bolts 323 for a more secure fixation.

[0059] Optionally, the first sub-vibration isolator 3211 and the second sub-vibration isolator 3212 are rubber blocks.

[0060] Secondly, this application proposes an engineering vehicle that includes the cab support system of the first aspect.

[0061] Understandably, the engineering vehicle of the second aspect possesses all the technical effects of the cab support system of the first aspect, and its specific technical effects will not be elaborated further.

[0062] Alternatively, the engineering vehicle may be a skid steer loader.

[0063] It should be noted that the engineering vehicle in this embodiment may also include other components, such as a power system, which will not be described in detail here.

[0064] In particular, the term "and / or" in this application should be understood as follows: In the first case, the term “and / or” between the first subject and the second subject includes any of the following meanings: (1) only the first subject; (2) only the second subject; and (3) both the first subject and the second subject.

[0065] In the second case, the term "and / or" between the last two of three or more subjects means including at least one of the subjects. For example, "first subject, second subject and / or third subject" has the same meaning as "first subject and / or second subject and / or third subject", specifically including the following combinations: (1) only the first subject; (2) only the second subject; (3) only the third subject; (4) first subject and second subject and no third subject; (5) first subject and third subject and no second subject; (6) second subject and third subject and no first subject; and (7) first subject, second subject and third subject; Furthermore, the character " / " in this application indicates that the objects before and after it are in an "or" relationship.

[0066] Finally, although the embodiments of this application have been described above in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the concept of this application, and such modifications and variations all fall within the scope of protection of this application.

Claims

1. A cab support system, characterized in that, include: Frame (10); The cab (20) is rotatably connected to the frame (10); The support mechanism (30) includes a main body (31) and a first end structure (32) and a second end structure (33) respectively disposed at both ends of the main body (31). The first end structure (32) is connected to the frame (10), and the second end structure (33) is connected to the cab (20). The main body (31) is telescopically oriented and supports the cab (20) to rotate relative to the frame (10). The first end structure (32) and / or the second end structure (33) are provided with vibration damping members (321).

2. The cab support system according to claim 1, characterized in that, It also includes a locking component (40); in the first operating condition, the cab (20) is close to the frame (10), and the locking component (40) secures the cab (20) to the frame (10). The frame (10) includes a first plate (11), and the cab (20) includes a second plate (21); The locking assembly (40) includes a shock absorber (46), a first bolt (41), a first nut (42), a first pad (43), and a second pad (44). The first bolt (41) passes through the first pad (43), at least a portion of the structure of the shock absorber (46), the first plate (11), the second plate (21), and the second pad (44) in sequence and is locked in place with the first nut (42).

3. The cab support system according to claim 2, characterized in that, The locking assembly (40) further includes a reinforcing plate (45) sleeved on the first bolt (41), the reinforcing plate (45) being connected to the side of the first plate (11) facing away from the second plate (21); The shock absorber (46) includes a first sub-shock absorber (461) and a second sub-shock absorber (462) sleeved on the bolt. The first sub-shock absorber (461) is disposed between the reinforcing plate (45) and the first pad (43), and the second sub-shock absorber (462) is disposed between the reinforcing plate (45) and the second plate (21).

4. The cab support system according to claim 3, characterized in that, The first pad (43) is fixedly connected to the first bolt (41), and the first pad (43) also has a first opening (431) spaced apart from the first bolt (41). The locking assembly (40) also includes a limiting member (47), which passes through the first opening (431) and is connected to the reinforcing plate (45).

5. The cab support system according to claim 4, characterized in that, The limiting member (47) has a limiting structure at one end facing away from the reinforcing plate (45), and the limiting structure restricts the first pad (43) from disengaging from the limiting member (47) in a direction away from the reinforcing plate (45).

6. The cab support system according to claim 5, characterized in that, The limiting member (47) has a screw hole at one end facing away from the reinforcing plate (45). The limiting structure includes a second bolt (48) and a third pad (49). The second bolt (48) passes through the third pad (49) and is locked with the screw hole. The third pad (49) can support the first pad (43). Alternatively, the limiting member may have a through hole in its radial direction, and the limiting structure may include a pin that passes through the through hole and can support the first pad (43).

7. The cab support system according to claim 3, characterized in that, The locking assembly (40) further includes a fourth washer (50) and a second nut (51) sleeved on the first bolt (41), the fourth washer (50) being disposed between the second sub-shock absorber (462) and the second plate (21); the second nut (51) being disposed between the fourth washer (50) and the second washer (44); And / or, a buffer layer (12) is provided between the first plate (11) and the second plate (21).

8. The cab support system according to any one of claims 1 to 7, characterized in that, The frame (10) includes a first plate (11); The vibration isolation member (321) includes a first sub-vibration isolation member (3211) and a second sub-vibration isolation member (3212); The first end structure (32) includes a first bracket (322), a third bolt (323) and a third nut (324), and the main body (31) is rotatably connected to the first bracket (322); The vibration isolation component (321) further includes a fifth partition plate (3213), and the third bolt (323) passes through the first bracket (322), the first sub-vibration isolation component (3211), the fifth partition plate (3213), the first plate (11) and the second sub-vibration isolation component (3212) in sequence and is locked with the third nut (324); Alternatively, the third bolt (323) passes sequentially through the first sub-vibration isolator (3211), the first bracket (322), the second sub-vibration isolator (3212), and the first plate (11) and is locked in place with the third nut (324).

9. The cab support system according to claim 8, characterized in that, The first sub-vibration isolator (3211) and / or the second sub-vibration isolator (3212) are provided with a reinforcing sleeve (325) at the opening, and the reinforcing sleeve (325) is sleeved on the third bolt (323).

10. An engineering vehicle, characterized in that, Includes the cab support system as described in any one of claims 1 to 9.

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