Cab overturning secondary protection device and vehicle

Abstract

The invention relates to the technical field of vehicles, in particular to a cab overturning secondary protection device and a vehicle. The protection device comprises two front suspension swing arm assemblies, two front suspension lower support assemblies, a connecting rod and two limiting blocks, the two front suspension swing arm assemblies and the two front suspension lower support assemblies are arranged in a one-to-one correspondence mode, and the front suspension swing arm assemblies are rotationally connected to the front suspension lower support assemblies. The two front suspension lower support assemblies are installed on the two sides of a frame respectively, the two front suspension swing arm assemblies are connected to the two sides of a cab respectively, the two ends of the connecting rod are connected to the two front suspension swing arm assemblies respectively, the two limiting blocks are installed on the two front suspension swing arm assemblies respectively, and the limiting blocks can abut against the front suspension lower support assemblies. Compared with the prior art, the front suspension swing arm assembly is provided with the limiting block, in the overturning process of the cab, when a hydraulic cylinder loses efficacy or is damaged, the limiting block abuts against the front suspension lower support assembly, the cab can be prevented from falling off, and safety accidents are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a secondary protection device for a cab rollover and a vehicle. Background Art

[0002] The hydraulic cylinder assembly plays a vital role in the flipping of the commercial vehicle cab. It withstands the complex forces exerted on it by the cab and maintains the stable flipping posture of the cab. It is the first-level protection device during the flipping process.

[0003] At present, there are still great differences in the quality of hydraulic cylinders, and most commercial vehicles at home and abroad rely only on a single hydraulic cylinder to maintain a stable flipping posture of the cab during the cab flipping process. When the hydraulic cylinder serving as the first-level protection is damaged, the cab will fall and cause a safety accident.

[0004] Therefore, there is an urgent need for a cab rollover secondary protection device and a vehicle to solve the above technical problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a secondary protection device for cab rollover and a vehicle, which can prevent the cab from falling when the primary protection device fails during the rollover process, thereby avoiding safety accidents.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A secondary protection device for cab rollover comprises: two front suspension swing arm assemblies, two front suspension lower bracket assemblies, a connecting rod and two limit blocks, the two front suspension swing arm assemblies are arranged in a one-to-one correspondence with the two front suspension lower bracket assemblies, the front suspension swing arm assemblies are rotatably connected to the front suspension lower bracket assemblies, the two front suspension lower bracket assemblies are respectively installed on both sides of the frame, the two front suspension swing arm assemblies are respectively connected to both sides of the cab, the two ends of the connecting rod are respectively connected to the two front suspension swing arm assemblies, the two limit blocks are respectively installed on the two front suspension swing arm assemblies, and the limit blocks can offset the front suspension lower bracket assemblies.

[0008] As a preferred technical solution of the above-mentioned secondary cab rollover protection device, the secondary cab rollover protection device also includes a plurality of mounting parts, wherein a part of the mounting parts pass through one end of the connecting rod and are connected to one of the front suspension swing arm assemblies, and another part of the mounting parts pass through the other end of the connecting rod and are connected to another of the front suspension swing arm assemblies.

[0009] As a preferred technical solution of the above-mentioned cab rollover secondary protection device, the mounting member is threadedly connected to the front suspension swing arm assembly.

[0010] As a preferred technical solution of the above-mentioned cab rollover secondary protection device, the mounting member is a bolt.

[0011] As a preferred technical solution of the above-mentioned cab rollover secondary protection device, the front suspension swing arm assembly is Y-shaped.

[0012] As an optimal technical solution of the above-mentioned secondary cab rollover protection device, the end of the front suspension swing arm assembly is provided with a first connecting part and a second connecting part, the first connecting part is connected to the connecting rod, and the second connecting part is rotatably connected to the front suspension lower bracket assembly.

[0013] As an optimal technical solution of the above-mentioned secondary cab rollover protection device, the secondary cab rollover protection device also includes two rotating parts, and the two rotating parts are arranged in a one-to-one correspondence with the two front suspension lower bracket assemblies. One end of the rotating part is rotatably passed through the second connecting part, and the other end of the rotating part is fixedly connected to the front suspension lower bracket assembly.

[0014] As an optimal technical solution of the above-mentioned secondary cab rollover protection device, the secondary cab rollover protection device also includes two bushings, the two bushings are arranged in a one-to-one correspondence with the two front suspension lower bracket assemblies, the outer ring of the bushing is rotatably connected to the second connecting part, and the rotating member is passed through the bushing.

[0015] As a preferred technical solution of the above-mentioned cab rollover secondary protection device, the front suspension swing arm assembly and the limit block are integrally formed.

[0016] A vehicle includes a drive system, and the vehicle also includes the secondary cab rollover protection device in any of the above embodiments. The drive system is installed on the frame, and the drive system is used to drive the vehicle to move.

[0017] Beneficial effects of the present invention:

[0018] The present invention provides a secondary protection device for a cab rollover. The secondary protection device for a cab rollover includes: two front suspension swing arm assemblies, two front suspension lower bracket assemblies, a connecting rod, and two limit blocks. The two front suspension swing arm assemblies are arranged in a one-to-one correspondence with the two front suspension lower bracket assemblies. The front suspension swing arm assemblies are rotatably connected to the front suspension lower bracket assemblies. The two front suspension lower bracket assemblies are respectively installed on both sides of the vehicle frame. The two front suspension swing arm assemblies are respectively connected to both sides of the cab. The two ends of the connecting rod are respectively connected to the two front suspension swing arm assemblies. The two limit blocks are respectively installed on the two front suspension swing arm assemblies, and the limit blocks can offset the front suspension lower bracket assemblies. Compared with the existing technology, the limit blocks are provided on the front suspension swing arm assembly. During the cab rollover process, when the hydraulic cylinder fails or is damaged, the limit blocks offset the front suspension lower bracket assembly, which can prevent the cab from falling and avoid causing safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0020] Figure 1 This is a first structural diagram of the cab rollover secondary protection device provided by an embodiment of the present invention;

[0021] Figure 2 This is a second structural diagram of the cab rollover secondary protection device provided by an embodiment of the present invention;

[0022] Figure 3 This is a third structural diagram of the cab rollover secondary protection device provided by an embodiment of the present invention;

[0023] Figure 4 This is a third structural schematic diagram of the cab rollover secondary protection device provided by an embodiment of the present invention.

[0024] In the picture:

[0025] 1. Front suspension swing arm assembly; 11. First connecting part; 111. Threaded hole; 12. Second connecting part; 2. Front suspension lower bracket assembly; 3. Connecting rod; 4. Limit block; 5. Rotating part; 6. Bushing. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0027] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0028] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0029] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0030] like Figures 1 to 4 As shown, the present invention provides a secondary protection device for cab rollover, which includes: two front suspension swing arm assemblies 1, two front suspension lower bracket assemblies 2, a connecting rod 3 and two limit blocks 4.

[0031] Specifically, the two front suspension swing arm assemblies 1 are arranged in a one-to-one correspondence with the two front suspension lower bracket assemblies 2. The front suspension swing arm assembly 1 is rotatably connected to the front suspension lower bracket assembly 2. The two front suspension lower bracket assemblies 2 are respectively installed on both sides of the vehicle frame. The two front suspension swing arm assemblies 1 are respectively connected to both sides of the cab. The two ends of the connecting rod 3 are respectively connected to the two front suspension swing arm assemblies 1. Two limit blocks 4 are respectively installed on the two front suspension swing arm assemblies 1, and the limit blocks 4 can offset the front suspension lower bracket assembly 2. Compared with the existing technology, the limit blocks 4 are provided on the front suspension swing arm assembly 1. During the cab flipping process, when the hydraulic cylinder fails or is damaged, the limit blocks 4 offset the front suspension lower bracket assembly 2, which can prevent the cab from falling and avoid causing safety accidents. It should be noted that when the cab is flipped to the extreme position, there is a distance of 1-2 mm between the limit block 4 and the front suspension lower bracket assembly 2. When the hydraulic cylinder (i.e., the first-level protection device) fails due to some reason, the limit block 4 and the front suspension lower bracket assembly 2 will offset each other, thereby protecting the cab from falling, that is, the second-level protection device will take effect.

[0032] Optionally, the secondary protection device for cab rollover further includes a plurality of mounting parts, wherein a part of the mounting parts pass through one end of the connecting rod 3 and are connected to one of the front suspension swing arm assemblies 1, and another part of the mounting parts pass through the other end of the connecting rod 3 and are connected to another of the front suspension swing arm assemblies 1, thereby improving the stability of the connection between the connecting rod 3 and the front suspension swing arm assembly 1.

[0033] Optionally, the front suspension swing arm assembly 1 is Y-shaped; a first connecting portion 11 and a second connecting portion 12 are provided at the end of the front suspension swing arm assembly 1, the first connecting portion 11 being connected to the connecting rod 3, and the second connecting portion 12 being rotatably connected to the front suspension lower bracket assembly 2. Specifically, the front suspension swing arm assembly 1 is provided with a first connecting portion 11 and a second connecting portion 12, the first connecting portion 11 being fixedly connected to the connecting rod 3, and the second connecting portion 12 being rotatably connected to the front suspension lower bracket assembly 2, so that the overall structure of the front suspension swing arm assembly 1 and the connecting rod 3 can rotate relative to the front suspension lower bracket assembly 2.

[0034] Optionally, the mounting member is threadedly connected to the front suspension arm assembly 1. Specifically, in this embodiment, the first connecting portion 11 is provided with three threaded holes 111. One end of each of the three mounting members can pass through the connecting rod 3 and be threadedly connected to the wall of the corresponding threaded hole 111. The other end of each of the three mounting members can abut the side wall of the connecting rod 3, thereby improving the stability of the connection between the connecting rod 3 and the front suspension arm assembly 1. Of course, in other embodiments, the number of threaded holes 111 is determined based on actual conditions and will not be further described here. Furthermore, the mounting member is a bolt.

[0035] Optionally, the secondary protection device for cab rollover further includes two rotating members 5, which are arranged in one-to-one correspondence with the two front suspension lower bracket assemblies 2. One end of the rotating member 5 is rotated and passed through the second connecting portion 12, and the other end of the rotating member 5 is fixedly connected to the front suspension lower bracket assembly 2, so that the front suspension swing arm assembly 1 can rotate relative to the front suspension lower bracket assembly 2.

[0036] Optionally, the cab rollover secondary protection device further includes two bushings 6, each corresponding to the two front suspension lower bracket assemblies 2. The outer ring of each bushing 6 is rotatably connected to the second connecting portion 12, and the rotating member 5 is inserted through the bushings 6. Specifically, one end of the rotating member 5 is inserted through the bushing 6 and fixedly connected to the front suspension lower bracket assembly 2. The bushing 6 is rotatably inserted through the second connecting portion 12. The provision of the bushing 6 can reduce friction between the rotating member 5 and the second connecting portion 12. Furthermore, the rotating member 5 is a bolt.

[0037] Optionally, the front suspension arm assembly 1 and the stop block 4 are integrally formed. Specifically, the stop block 4 and the front suspension arm assembly 1 are forged together into a single component, forming an integrally formed structure, which can effectively improve the reliability and stability of the structure, thereby enhancing the protection capability; without increasing the number of assembly workpieces and working steps, and without affecting assembly efficiency.

[0038] The present invention also provides a vehicle comprising a drive system and the secondary cab rollover protection device of any of the aforementioned embodiments, wherein the drive system is mounted on a vehicle frame and is configured to drive the vehicle, and the vehicle also comprises other essential components of a vehicle as known in the art. Compared to the prior art, the secondary cab rollover protection device occupies less space, has a simple structure, provides precise fit, reduces structural design redundancy, and thereby optimizes the vehicle's installation location, resulting in a simpler structure and precise fit.

[0039] Furthermore, the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A secondary protection device for cab rollover, characterized in that: include: Two front suspension arm assemblies (1), two front suspension lower bracket assemblies (2), a connecting rod (3) and two limit blocks (4); the two front suspension arm assemblies (1) are arranged in a one-to-one correspondence with the two front suspension lower bracket assemblies (2); the front suspension arm assemblies (1) are rotatably connected to the front suspension lower bracket assemblies (2); the two front suspension lower bracket assemblies (2) are respectively installed on both sides of the vehicle frame; the two front suspension arm assemblies (1) are respectively connected to both sides of the cab; the two ends of the connecting rod (3) are respectively connected to the two front suspension arm assemblies (1); the two limit blocks (4) are respectively installed on the two front suspension arm assemblies (1), and the limit blocks (4) can be offset against the front suspension lower bracket assemblies (2).

2. The cab rollover secondary protection device according to claim 1, characterized in that: The cab rollover secondary protection device further comprises a plurality of mounting parts, wherein a portion of the mounting parts passes through one end of the connecting rod (3) and is connected to one of the front suspension swing arm assemblies (1), and another portion of the mounting parts passes through the other end of the connecting rod (3) and is connected to another of the front suspension swing arm assemblies (1).

3. The cab rollover secondary protection device according to claim 2, characterized in that: The mounting member is threadedly connected to the front suspension swing arm assembly (1).

4. The cab rollover secondary protection device according to claim 3, characterized in that: The mounting piece is a bolt.

5. The cab rollover secondary protection device according to claim 1, characterized in that: The front suspension swing arm assembly (1) is Y-shaped.

6. The cab rollover secondary protection device according to claim 5, characterized in that: The end of the front suspension swing arm assembly (1) is provided with a first connecting portion (11) and a second connecting portion (12), wherein the first connecting portion (11) is connected to the connecting rod (3), and the second connecting portion (12) is rotatably connected to the front suspension lower bracket assembly (2).

7. The cab rollover secondary protection device according to claim 6, characterized in that: The cab rollover secondary protection device further comprises two rotating members (5), the two rotating members (5) being arranged in a one-to-one correspondence with the two front suspension lower bracket assemblies (2), one end of the rotating member (5) being rotatably passed through the second connecting portion (12), and the other end of the rotating member (5) being fixedly connected to the front suspension lower bracket assembly (2).

8. The secondary protection device for cab rollover according to claim 7, characterized in that: The cab rollover secondary protection device further includes two bushings (6), the two bushings (6) are arranged in a one-to-one correspondence with the two front suspension lower bracket assemblies (2), the outer ring of the bushing (6) is rotatably connected to the second connecting portion (12), and the rotating member (5) is passed through the bushing (6).

9. A cab rollover secondary protection device according to any one of claims 1 to 8, characterized in that: The front suspension swing arm assembly (1) and the limit block (4) are integrally formed.

10. A vehicle comprising a drive system, characterized in that: The vehicle further comprises a cab rollover secondary protection device as claimed in any one of claims 1 to 9, the drive system is mounted on the vehicle frame, and the drive system is used to drive the vehicle to move.

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