Cab rollover protection mechanism, cab assembly and vehicle

Abstract

The present application relates to the technical field of vehicles, in particular to a cab rollover protection mechanism, a cab assembly and a vehicle. The cab rollover protection mechanism comprises a seat frame and an adjusting rod set. The seat frame comprises a top seat and support rods. One end of at least two support rods is rotatably installed on the top seat. The other end of the support rods can be detachably installed on a chassis under the cab. The adjusting rod set comprises at least two straight rods connected in sequence. One of the two adjacent straight rods is adjustably connected with the other straight rod. The first straight rod in the adjusting rod set is connected with the top seat. The last straight rod can be connected with the cab after rollover. The cab assembly and the vehicle comprise the cab rollover protection mechanism described above, so as to avoid damage of the cab caused by backfall and injury to the maintenance personnel, and improve the safety of the cab rollover. The seat frame and the adjusting rod set have simple structure and will not cause hydraulic failure and electrical failure, so as to improve the reliability of the cab rollover protection mechanism.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a cab rollover protection mechanism, a cab assembly, and a vehicle. Background Technology

[0002] In the cab assembly of engineering vehicles, various mechanical and electrical components are located in the chassis beneath the cab. The cab is lifted and tilted via a lifting and tilting mechanism to facilitate the inspection and maintenance of components on the chassis. Based on the tilting angle, the cab can be categorized into two types: tilting above the center of gravity and tilting below the center of gravity. When the cab tilts above the center of gravity, if the lifting cylinder in the lifting and tilting mechanism experiences a hydraulic or electrical failure, the cab will tip forward. While this won't injure maintenance personnel, it could result in a fall and the vehicle being scrapped. When the cab tilts below the center of gravity, if the lifting cylinder experiences a hydraulic or electrical failure, the cab will fall back onto the chassis, potentially injuring maintenance personnel and causing a safety accident.

[0003] Existing cab assemblies also include cab rollover protection mechanisms to prevent safety accidents caused by a rolled-over cab. These mechanisms typically include components such as support arms and locking cylinders, resulting in numerous parts, complex structures, and cumbersome operation. Furthermore, the support arms and locking cylinders themselves are susceptible to failure, reducing the reliability of the cab rollover protection mechanism. Summary of the Invention

[0004] The purpose of this invention is to provide a cab rollover protection mechanism, a cab assembly, and a vehicle, so as to simplify the structure of the cab rollover protection mechanism, facilitate installation and use, improve reliability, and ensure safety after the cab rolls over.

[0005] To achieve this objective, the technical solution adopted by the present invention is as follows:

[0006] The cab rollover protection mechanism includes:

[0007] A seat frame, the seat frame including a top seat and support rods, at least two of the support rods having one end rotatably mounted on the top seat, and the other end of the support rods being detachably mounted on the chassis below the cab;

[0008] An adjusting rod assembly includes at least two straight rods connected in sequence, wherein one of the two adjacent straight rods is tunably connected to the other straight rod. The first straight rod in the adjusting rod assembly is connected to the top seat, and the last straight rod is capable of being connected to the overturned cab.

[0009] As an optional solution for the cab rollover protection mechanism, the adjusting rod assembly further includes a first locking member. The straight rods are provided with a plurality of adjusting holes spaced apart along their length. At least one adjusting hole of one of the two adjacent straight rods is selectively coaxial with the adjusting hole of the other straight rod. The first locking member passes through the two coaxial adjusting holes in sequence to lock the two adjacent straight rods.

[0010] As an optional solution for the cab rollover protection mechanism, the straight rod is provided with a plurality of adjustment holes at equal intervals along its length, and the two adjustment holes of one of the two adjacent straight rods are coaxially connected to the two adjustment holes of the other straight rod in a one-to-one correspondence.

[0011] As an optional solution for the cab rollover protection mechanism, the cab rollover protection mechanism further includes a second locking member. The top seat has a fixing hole, and the adjustment hole of the straight rod is coaxially arranged with the fixing hole. The second locking member passes through the coaxially arranged fixing hole and adjustment hole in sequence to lock the top seat and the straight rod.

[0012] As an optional solution for the cab rollover protection mechanism, the top seat is provided with a guide groove through it along the height direction, and the fixing hole communicates with the guide groove; a straight rod passes through the guide groove, and the adjustment hole on the straight rod is coaxially arranged with the fixing hole.

[0013] As an optional solution for the cab rollover protection mechanism, the top seat has at least two fixing holes spaced apart along the height, and the distance between two adjacent fixing holes is equal to the distance between two adjacent adjusting holes.

[0014] As an optional solution for the cab rollover protection mechanism, at least two of the support rods are arranged opposite each other and at an angle on the top seat to form an inverted V-shaped frame, and the included angle of the V-shaped frame is adjustable.

[0015] As an alternative to the cab rollover protection mechanism, an elastic element is telescopically installed between at least two of the support rods, the elastic element being able to limit the included angle of the V-shaped frame opening.

[0016] The cab assembly includes the cab and the aforementioned cab rollover protection mechanism. The support rod is detachably mounted on the chassis, and the last straight rod of the adjusting rod assembly is connected to the cab.

[0017] The vehicle, including the aforementioned cab assembly.

[0018] The beneficial effects of this invention are as follows:

[0019] The cab rollover protection mechanism proposed in this invention includes a seat frame and an adjusting rod assembly. A support rod is mounted on the chassis below the cab. The first straight rod in the adjusting rod assembly is connected to the top seat, and the last straight rod is connected to the rolled-over cab. This allows the cab rollover protection mechanism to be installed between the rolled-over cab and the chassis, providing stable support for the cab and preventing it from falling and becoming unusable or injuring maintenance personnel, thus improving the safety of the cab after rollover. Furthermore, both the seat frame and the adjusting rod assembly are mechanical components, simple in structure, easy to install and use, and free from hydraulic and electrical failures, improving the reliability of the cab rollover protection mechanism and ensuring the safety of the cab after rollover.

[0020] The cab assembly proposed in this invention includes the aforementioned cab rollover protection mechanism. By installing the cab rollover protection mechanism between the rollover cab and the chassis, it provides stable support for the cab, preventing the cab from falling and becoming unusable or causing injury to maintenance personnel, thus improving the safety of the cab after rollover. Furthermore, the seat frame and adjusting rod assembly are both mechanical structural components, with a simple structure, easy installation and use, and no risk of hydraulic or electrical failure, improving the reliability of the cab rollover protection mechanism and ensuring safety after the cab rolls over.

[0021] The vehicle proposed in this invention includes the aforementioned cab assembly. By installing a cab rollover protection mechanism between the rollover cab and the chassis, it provides stable support for the cab, preventing it from falling and becoming unusable or causing injury to maintenance personnel, thus improving safety after the cab rolls over. Furthermore, the seat frame and adjusting rod assembly are both mechanical components, with a simple structure, easy installation and use, and no risk of hydraulic or electrical failure, improving the reliability of the cab rollover protection mechanism and ensuring safety after the cab rolls over. Attached Figure Description

[0022] Figure 1 This is a partial structural schematic diagram of the cab assembly after the cab has been flipped, as provided in an embodiment of the present invention;

[0023] Figure 2 This is a front view of the cab rollover protection mechanism provided in an embodiment of the present invention.

[0024] The component names and labels in the diagram are as follows:

[0025] 10. Cab; 20. Chassis; 30. Lifting and tilting mechanism;

[0026] 1. Base; 11. Top seat; 111. Fixing hole; 112. Mounting hole; 12. Support rod; 121. Second hole; 122. Third hole; 2. Straight rod; 21. Adjustment hole; 3. Elastic element. Detailed Implementation

[0027] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. Furthermore, it should be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, not all of them.

[0028] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0031] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] like Figure 1As shown, this embodiment proposes a cab assembly, which includes a cab 10, a chassis 20, and a lifting and tilting mechanism 30. Both the cab 10 and the lifting and tilting mechanism 30 are mounted on the chassis 20. The lifting and tilting mechanism 30 includes driving components such as a lifting cylinder (generally a hydraulic cylinder). The piston rod of the lifting cylinder is connected to the cab 10 to drive the cab 10 to lift and tilt relative to the chassis 20, so as to facilitate maintenance personnel to repair the parts mounted on the chassis 20.

[0033] The existing cab assembly also includes a cab rollover protection mechanism to prevent safety accidents caused by a rolled-over cab 10. The existing cab rollover protection mechanism usually includes components such as support arms and locking cylinders. Not only are there many parts, but the structure is also complex and the operation is cumbersome. In addition, the support arms and locking cylinders mentioned above are also prone to failure, which reduces the reliability of the cab rollover protection mechanism.

[0034] To solve the above problems, such as Figure 1 and Figure 2 As shown, this embodiment also proposes a cab rollover protection mechanism, which includes a seat frame 1 and an adjusting rod assembly. The seat frame 1 includes a top seat 11 and support rods 12. At least two support rods 12 have one end rotatably mounted on the top seat 11, and the other end of the support rods 12 can be detachably mounted on the chassis 20 below the cab 10. The adjusting rod assembly includes at least two straight rods 2 connected in sequence, and one of two adjacent straight rods 2 is tunably connected to the other straight rod 2. The first straight rod 2 in the adjusting rod assembly is connected to the top seat 11, and the last straight rod 2 can be connected to the rolled-over cab 10. By installing the support rod 12 on the chassis 20 below the cab 10, the first straight rod 2 in the adjusting rod assembly is connected to the top seat 11, and the last straight rod 2 is connected to the overturned cab 10. This allows the cab rollover protection mechanism to be installed between the overturned cab 10 and the chassis 20, providing stable support for the cab 10 and preventing it from falling and being scrapped or causing injury to maintenance personnel, thus improving the safety of the cab 10 after rollover. Furthermore, both the seat frame 1 and the adjusting rod assembly are mechanical components, with a simple structure that is easy to install and use. They also prevent hydraulic and electrical failures, improving the reliability of the cab rollover protection mechanism and ensuring the safety of the cab 10 after rollover.

[0035] It should be noted that, along Figure 2 In the vertical direction, the bottommost straight rod 2 is the first straight rod 2, and the topmost straight rod 2 is the last straight rod 2. The number of straight rods 2 in the adjusting rod group can be increased or decreased according to the lifting height of the cab 10 and the length of each straight rod 2, as long as the last straight rod 2 in the adjusting rod group can be connected to the cab 10 after it is tilted.

[0036] like Figure 2 As shown, at least two support rods 12 are positioned opposite each other and inclined on the top seat 11 to form an inverted V-shaped frame, and the included angle of the V-shaped frame is adjustable. Since the support rods 12 are rotatably mounted on the top seat 11, the tilt angle of each support rod 12 is adjustable, allowing each support rod 12 to flexibly adjust its tilt angle according to different installation positions on the chassis 20, thus improving the versatility of the cab rollover protection mechanism. Simultaneously, when the tilt angle of the support rods 12 is adjusted, the included angle of the V-shaped frame changes accordingly, causing a change in the overall height of the V-shaped frame. This achieves a single adjustment of the overall height of the cab rollover protection mechanism, improving the adjustment range and accuracy of the cab rollover protection mechanism in the height direction (vertical direction in the figure).

[0037] Specifically, a support rod 12 is rotatably mounted on each of the left and right sides of the top seat 11. In other embodiments, the number of support rods 12 may be three or four or more. The top seat 11 has two mounting holes 112. Each end of the support rod 12 has a first hole and a second hole 121. The first hole of the support rod 12 is coaxially aligned with the corresponding mounting hole 112 and connected via a pivot, allowing the support rod 12 to rotate relative to the top seat 11. The second hole 121 of the support rod 12 is pivotally connected to the mounting structure of the chassis 20, achieving a pivotal connection between the support rod 12 and the chassis 20.

[0038] Furthermore, an elastic element 3 is telescopically installed between at least two support rods 12, and the elastic element 3 can limit the opening angle of the V-shaped frame. Specifically, a third hole 122 is provided on the support rod 12, one end of the elastic element 3 is connected to the third hole 122 of one support rod 12, and the other end of the elastic element 3 is connected to the third hole 122 of the other support rod 12, so as to achieve a stable installation of the elastic element 3. Since the elastic element 3 has a compression limit and a tensile limit, it limits the opening angle of the V-shaped frame, avoiding the opening angle of the V-shaped frame being too large or too small, so as to ensure that the cab rollover protection mechanism has good support performance.

[0039] In this embodiment, the elastic element 3 is a spring. The spring has a simple structure and is easy to install and use. The two ends of the spring are respectively installed in the third hole 122 of the two support rods 12, which improves the stability of the base 1 and prevents collisions and interference caused by the free rotation of the support rods 12. Of course, in other embodiments, the elastic element 3 can also be a tension spring, a sheet spring, etc.

[0040] like Figure 2As shown, the adjusting rod assembly also includes a first locking member. The straight rods 2 have multiple adjusting holes 21 spaced apart along their length. At least one adjusting hole 21 of one of two adjacent straight rods 2 is selectively coaxial with the adjusting hole 21 of the other straight rod 2. The first locking member passes through two coaxial adjusting holes 21 in sequence to lock the two adjacent straight rods 2. In this embodiment, the first locking member is a bolt and a nut. The bolt passes through two coaxial adjusting holes 21 in two adjacent straight rods 2 and is locked with the nut to fix the two adjacent straight rods 2 together. By selecting different adjusting holes 21 on two adjacent straight rods 2 according to the length requirements of the adjusting rod assembly to achieve coaxial setting and fixing them together with the first locking member, the assembly operation of the adjusting rod assembly is simplified, and the length of the adjusting rod assembly is adjusted. This allows for secondary adjustment of the overall height of the cab rollover protection mechanism, improving the adjustment range and accuracy of the cab rollover protection mechanism in the height direction.

[0041] Furthermore, the straight rod 2 has multiple adjusting holes 21 evenly spaced along its length. The two adjusting holes 21 of one straight rod 2 are coaxially connected to the two adjusting holes 21 of the other straight rod 2 in a one-to-one correspondence. Since the spacing of the adjusting holes 21 in each straight rod 2 is equal, multiple sets of coaxially arranged adjusting holes 21 can be simultaneously present between two adjacent straight rods 2. These multiple sets of coaxially arranged adjusting holes 21 are locked together by first fasteners, thereby improving the connection strength between adjacent straight rods 2, preventing relative rotation between them, and enhancing the stability of the adjusting rod assembly structure.

[0042] It should be noted that the last straight rod 2 of the adjusting rod assembly can be connected to the bottom pivot of the cab 10 so that the straight rod 2 can achieve a stable supporting contact with the cab 10 at different tilting angles.

[0043] like Figure 2 As shown, the cab rollover protection mechanism also includes a second locking member. The top seat 11 has a fixing hole 111, and the adjusting hole 21 of the straight rod 2 is coaxially arranged with the fixing hole 111. The second locking member passes sequentially through the coaxially arranged fixing hole 111 and adjusting hole 21 to lock the top seat 11 and the straight rod 2. In this embodiment, the second locking member is also a bolt and a nut. The bolt passes through the coaxial fixing hole 111 and adjusting hole 21 and is then locked with the nut to fix the top seat 11 and the straight rod 2 together. Based on the length requirements of the adjusting rod assembly, one of the adjusting holes 21 on the first straight rod 2 is selected to be coaxially arranged with the fixing hole 111 of the top seat 11 and fixedly connected through the second locking member. This simplifies the assembly operation of the top seat 11 and the straight rod 2, further realizing the height adjustment of the cab rollover protection mechanism. It can be understood that the top seat 11 can be fixedly connected to the first straight rod 2 or any other straight rod 2 through the second locking member.

[0044] Specifically, the top seat 11 has at least two fixing holes 111 spaced apart along its height, and the distance between two adjacent fixing holes 111 is equal to the distance between two adjacent adjusting holes 21. Since the fixing holes 111 and the adjusting holes 21 have the same arrangement spacing, multiple adjusting holes 21 can be coaxially arranged in one-to-one correspondence with the corresponding fixing holes 111, so that the top seat 11 and the straight rod 2 are locked together by multiple second fasteners, which improves the connection strength between the top seat 11 and the straight rod 2, prevents the straight rod 2 from rotating or shifting position relative to the top seat 11, and improves the stability of the cab rollover protection mechanism structure.

[0045] In this embodiment, a guide groove is provided through the top seat 11 along the height direction, and the fixing hole 111 communicates with the guide groove. A straight rod 2 passes through the guide groove, and the adjustment hole 21 on the straight rod 2 is coaxially arranged with the fixing hole 111. Through the sliding cooperation between the straight rod 2 and the guide groove, the installation of the straight rod 2 is guided and limited, which improves the installation efficiency of the straight rod 2 on the top seat 11. At the same time, the straight rod 2 is circumferentially limited so that the straight rod 2 is always in a vertical state in the vertical direction, so as to better support the cab 10 after it is tilted.

[0046] This embodiment also proposes a vehicle, which can be an engineering vehicle, etc., and is not specifically limited thereto. The vehicle includes the aforementioned cab assembly. The support rod 12 is detachably mounted on the chassis 20. The last straight rod 2 of the adjusting rod assembly is connected to the overturned cab 10 to provide stable support for the overturned cab 10, thereby improving the safety of the cab 10 after overturning. Moreover, the seat frame 1 and the adjusting rod assembly are both mechanical structural components, with simple structures, easy to install and use, and will not experience hydraulic or electrical failures, thus improving the reliability of the cab overturning protection mechanism and ensuring the safety of the cab 10 after overturning.

[0047] The above embodiments merely illustrate the basic principles and characteristics of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cab rollover protection mechanism, characterized by, The application relates to a cab rollover protection mechanism. The cab rollover protection mechanism comprises a seat frame (1) and an adjusting rod group, wherein the seat frame (1) comprises a top seat (11) and support rods (12), one end of at least two support rods (12) is rotatably arranged on the top seat (11), and the other end of the support rods (12) is detachably arranged on a chassis (20) below a cab (10); the adjusting rod group comprises at least two straight rods (2) which are sequentially connected, one of two adjacent straight rods (2) is adjustably connected with the other straight rod (2), the first straight rod (2) in the adjusting rod group is connected with the top seat (11), and the last straight rod (2) can be connected with the cab (10) after the cab (10) is overturned. The adjusting rod group further comprises a first locking member, a plurality of adjusting holes (21) are arranged on the straight rods (2) and are spaced apart along the length direction, at least one adjusting hole (21) of one of two adjacent straight rods (2) is selectively coaxial with the adjusting hole (21) of the other straight rod (2), and the first locking member sequentially passes through the coaxial adjusting holes (21) to lock the two adjacent straight rods (2). The cab rollover protection mechanism further comprises a second locking member, the top seat (11) is provided with a fixing hole (111), the adjusting hole (21) of the straight rod (2) is coaxially arranged with the fixing hole (111), and the second locking member sequentially passes through the coaxially arranged fixing hole (111) and adjusting hole (21) to lock the top seat (11) and the straight rod (2). The top seat (11) is provided with at least two fixing holes (111) which are spaced apart along the height direction, and the interval between two adjacent fixing holes (111) is equal to the interval between two adjacent adjusting holes (21). At least two support rods (12) are oppositely and obliquely arranged on the top seat (11) to form an inverted V-shaped frame, and the included angle of the V-shaped frame can be adjusted. A resilient member (3) is telescopically arranged between the at least two support rods (12), and the resilient member (3) can limit the included angle of the V-shaped frame. The straight rods (2) are provided with a plurality of adjusting holes (21) which are equally spaced apart along the length direction, and two adjusting holes (21) of one of two adjacent straight rods (2) are coaxially communicated with two adjusting holes (21) of the other straight rod (2) in a one-to-one correspondence.

2. The cab rollover protection mechanism of claim 1, wherein The top seat (11) is provided with a guide groove which penetrates along the height direction, the fixing hole (111) is communicated with the guide groove, one straight rod (2) is arranged in the guide groove, and the adjusting hole (21) on the straight rod (2) is coaxially arranged with the fixing hole (111).

3. The cab rollover protection mechanism of claim 1, wherein The cab assembly comprises the cab (10) and the cab rollover protection mechanism in any one of claims 1-3, the support rods (12) are detachably arranged on the chassis (20), and the last straight rod (2) of the adjusting rod group is connected with the cab (10).

4. A cab assembly characterized by, The cab assembly comprises the cab assembly in claim 4.

5. Vehicle, characterized in that ​

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