Rear suspension damping locking structure of off-highway wide-body cab

Abstract

The rear suspension damping locking structure of the off-highway wide-body cab comprises rear end lengthening assemblies fixed to the two sides of the outer wall of the rear end of the cab and damping locking devices arranged on the two sides of a frame and located on the rear sides of front axle hydro-pneumatic springs on the same side, and the upper ends of the damping locking devices are connected with the rear end lengthening assemblies; the lower end of the damping locking device is fixedly connected with the frame, and in the whole vehicle running process, rear suspension damping of the vehicle is achieved through the damping locking device with the up-down elastic buffering capacity. The structure of the rear end lengthening assembly is optimized, the rear end lengthening assembly is connected with the frame through the damping locking device, rear suspension damping of the vehicle is achieved, the problem that an existing cab rear suspension point cannot be connected with the rear end of a cab is solved, the use requirement for reliability of a locking mechanism is met, and the rear end lengthening assembly is simple in structure, reasonable in design and convenient to use. The guide structure is simple in structure, convenient to assemble and disassemble, reliable in safety, smoother and more reliable in guide effect compared with an original structure, and strength and stability are effectively guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of off-road transport vehicles, and in particular relates to a rear suspension shock-absorbing locking structure of an off-road wide-body cab. Background Art

[0002] As the mining volume increases year by year, the required off-road transport vehicle transportation volume continues to increase, and the tonnage of its off-road mining vehicles is gradually increasing, which will face serious challenges to the practicality and reliability of off-road transport vehicles. The traditional off-road transport vehicle front suspension structure uses a leaf spring structure, which has the disadvantages of poor comfort, long longitudinal dimensions, easy wear of the leaf spring pin at the connection with the frame, etc., and slightly poor in comprehensive shock absorption and transmission of various forces; with the birth and application of the oil-gas spring cylinder, it overcomes the shortcomings of the leaf spring, and the comprehensive performance of shock absorption and force transmission is improved. However, due to the wide-body cab shape and the position of the front and rear suspension points of the off-road wide-body transport vehicle, the oil-gas spring cylinder occupies the position of the rear suspension point, which will cause the rear suspension point to be located in the blank space at the rear end of the cab and cannot be connected to the rear end of the cab. Therefore, in response to this problem, it is necessary to redesign a rear suspension damping locking structure. Utility Model Content

[0003] The technical problem solved by the utility model is: to provide a rear suspension shock-absorbing locking structure for an off-road wide-body cab, by optimizing the structure of the rear end extension component and adopting a shock-absorbing locking device to connect the rear end extension component to the frame, the rear suspension shock absorption of the vehicle is achieved, the problem that the existing rear suspension point of the cab cannot be connected to the rear end of the cab is solved, the reliability requirements of the locking mechanism are met, the structure is simple, the design is reasonable, the assembly and disassembly is convenient, the safety is reliable, the guiding effect is smoother and more reliable than the original structure, and the strength and stability are effectively guaranteed.

[0004] The technical solution adopted by the utility model: a rear suspension shock-absorbing locking structure of an off-road wide-body cab, comprising a rear end extension component fixed to both sides of the rear end outer wall of the cab and a shock-absorbing locking device arranged on both sides of the frame and located behind the oil and gas spring of the front axle on the same side, the upper end of the shock-absorbing locking device is connected to the rear end extension component, and the lower end of the shock-absorbing locking device is fixedly connected to the frame, and during the driving process of the whole vehicle, the rear suspension shock absorption of the vehicle is realized by the shock-absorbing locking device with upper and lower elastic buffer amounts.

[0005] Among them, the shock-absorbing locking device includes an upper bracket, a guide mechanism, a locking mechanism, a support assembly, a shock absorber and a lower bracket, the upper part of the upper bracket is fixedly connected to the lower end of the rear end extension assembly, one side of the lower part of the upper bracket is connected to the upper and lower guiding of the locking mechanism, and the other side of the lower part of the upper bracket is adapted to the upper end guide positioning of the support assembly, the inner side of the support assembly is connected to the locking mechanism, the lower end of the guide mechanism is fixed to the frame, and the outer side of the support assembly is connected to the upper end of the guide mechanism in an up and down movably guiding manner, the lower end of the support assembly is fixedly connected to the upper end of the shock absorber, and the lower end of the shock absorber is fixedly connected to the lower bracket fixed to the frame.

[0006] The guide cone is located on the outer side of the guide locking plate and is fixed to the bottom surface of the bracket, and the lower end of the guide cone is an inverted cone structure, and the lower end of the guide cone is adapted to be connected with the guide circular hole at the upper end of the support assembly, the locking cylinder is adapted to be guided up and down with the upper end of the locking mechanism, and the two ends of the locking cylinder are fixedly connected with the side plates on the corresponding sides of the guide locking plate, and the locking cylinder is adapted to be moved up and down along the adaptation hole on the locking mechanism under the cooperation of the guide cone and the locking mechanism and the locking cylinder and the locking mechanism.

[0007] Furthermore, the cross section of the guide locking plate is an inverted U-shaped structure with the opening facing downward, and the lower ends of the two side plates of the guide locking plate are provided with bent sections bent outward, and the angle between the bent section and the vertical section is 20° to 30°.

[0008] Furthermore, the guide mechanism includes a guide bracket and a guide wheel, the guide bracket is an inverted L-shaped groove structure, the outer side of the lower end of the guide bracket is fixedly connected to the frame, the two guide wheels distributed up and down are located at the upper end of the guide bracket, and the guide wheels are supported on the support assembly through bolts, and under the guiding connection between the guide wheels and the support assembly, the guide wheels can move up and down along the guiding direction of the support assembly.

[0009] Furthermore, the guide wheel has a structure of a steel sleeve inner wheel and a resin outer wheel arranged on the outer wheel surface of the steel sleeve inner wheel.

[0010] Furthermore, the locking mechanism includes a hydraulic lock mounting plate and a hydraulic lock, the hydraulic lock mounting plate is a square structure with a middle hole opened at the upper end, and the outer walls on both sides of the hydraulic lock mounting plate are provided with guide long slot holes, and the locking cylinder on the guide locking plate inserted into the upper end of the hydraulic lock mounting plate is adapted to the guide long slot holes, the hydraulic lock is a U-shaped slot structure with the opening facing outward, and the hydraulic lock is fixed on the side walls of the hydraulic lock mounting plate, and the hydraulic lock is inserted and fixedly connected to the two side walls of the support assembly.

[0011] Furthermore, the support assembly includes a U-shaped support plate with an opening facing outward and a sealing plate fixed to the upper end of the U-shaped support plate, the hydraulic lock is plugged and fixedly connected to the U-shaped support plate, the upper end surface of the sealing plate is provided with a guide circular hole adapted to be connected to the guide cone, long holes are provided on both side walls of the U-shaped support plate, and a guide wheel located inside the U-shaped support plate and in contact with an inner groove surface of the U-shaped support plate is guided and supported on the U-shaped support plate by bolts passing through the long holes, and the lower end of the U-shaped support plate is fixedly connected to the upper end of the shock absorber.

[0012] Furthermore, the lower bracket adopts a structure in which a side plate and a plurality of ear plates fixed on both side walls of the side plate are fixedly connected as one body, the side plate of the lower bracket is fixed on the frame, and the lower end of the shock absorber is fixedly connected to the ear plates at corresponding positions.

[0013] Furthermore, the rear end extension assembly includes an extended crossbeam and a reinforcement plate, the end of the extended crossbeam is fixed to the rear side wall of the cab, and the reinforcement plate fixed to the upper end surface of the extended crossbeam is fixedly connected to the rear side wall of the cab, and the extended crossbeam is fixedly connected to the upper bracket in the shock-absorbing locking device.

[0014] The advantages of this utility model compared with the prior art:

[0015] 1. This technical solution optimizes the structure of the rear-end extension component and uses a shock-absorbing locking device to connect the rear-end extension component to the frame to achieve rear suspension shock absorption of the vehicle, solves the problem that the existing rear suspension point of the cab cannot be connected to the rear end of the cab, and meets the reliability requirements of the locking mechanism;

[0016] 2. In addition to the guide cone, the shock-absorbing locking device of the technical solution is also provided with a guide locking plate with the lower end bent outward. The bending sections at the lower ends of both sides of the guide locking plate are provided with angles to facilitate the guidance with the locking cylinder, making the guiding effect smoother and more reliable;

[0017] 3. The locking mechanism in the shock-absorbing locking device of the technical solution is an assembly structure, which is conducive to the installation and adjustment of the hydraulic lock, without restrictions on the assembly sequence, and the assembly performance is improved while ensuring the strength of the locking mechanism;

[0018] 4. This technical solution has a simple structure, reasonable design, convenient assembly and disassembly, reliable safety, good guiding effect, and effectively guaranteed strength and stability. It can realize the diversified arrangement of different cab rear suspensions, meet different needs, and provide users with different choices. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the installation structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the installation structure of the frame of the utility model and the shock-absorbing locking devices on both sides thereof;

[0021] Figure 3 This is a schematic diagram of the structure of the shock-absorbing locking device of the utility model;

[0022] Figure 4 This is a schematic diagram of the exploded structure of the shock-absorbing locking device of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the rear end extension component of the utility model. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiment of the present utility model Figure 1-5 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that, in this document, unless otherwise stated, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, are only for the convenience of describing 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, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc., are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] In this document, the terms "comprises", "comprising" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further limitations. The elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0027] The rear suspension shock-absorbing locking structure of the off-road wide-body cab, such as Figure 1-5 As shown, it includes a rear end extension component 2 fixed to both sides of the rear end outer wall of the cab 1 and a shock-absorbing locking device 4 arranged on both sides of the frame 5 and located at the rear side of the front axle oil-gas spring 3 on the same side. The upper end of the shock-absorbing locking device 4 is connected to the rear end extension component 2, and the lower end of the shock-absorbing locking device 4 is fixedly connected to the frame 5. During the driving process of the whole vehicle, the rear suspension shock absorption of the vehicle is realized by the shock-absorbing locking device 4 with upper and lower elastic buffer amounts.

[0028] like Figure 1-4 As shown, the specific structure of the shock-absorbing locking device 4 is as follows: the shock-absorbing locking device 4 includes an upper bracket 41, a guide mechanism 42, a locking mechanism 43, a support assembly 44, a shock absorber 45 and a lower bracket 46, the upper portion of the upper bracket 41 is fixedly connected to the lower end of the rear end extension component 2, one side of the lower portion of the upper bracket 41 is connected to the locking mechanism 43 for up and down guiding, and the other side of the lower portion of the upper bracket 41 is adapted to the upper end of the support assembly 44 for guiding and positioning, the inner side of the support assembly 44 is connected to the locking mechanism 43, the lower end of the guide mechanism 42 is fixed to the frame 5, and the outer side of the support assembly 44 is connected to the upper end of the guide mechanism 42 for up and down movable guiding, the lower end of the support assembly 44 is fixedly connected to the upper end of the shock absorber 45, and the lower end of the shock absorber 45 is fixedly connected to the lower bracket 46 fixed to the frame 5; in the above structure, the guide mechanism 42 reciprocates up and down along the Z-axis direction of the frame 5, providing a movable distance for the up and down movement of the cab 1, thereby playing a shock-absorbing role.

[0029] like Figure 3-4As shown, the specific structure of the upper bracket 41 is as follows: the upper bracket 41 includes a bracket 41-1, a guide cone 41-2, a locking cylinder 41-3 and a guide locking plate 41-4, the bracket 41-1 is a structure composed of an L-shaped plate and a vertical plate vertically fixed to the L-shaped plate and arranged parallel to the vertical plate of the L-shaped plate, the outer side of the vertical plate is provided with a reinforcing rib fixedly connected to the horizontal plate of the L-shaped plate, the vertical plate and the vertical plate of the L-shaped plate in the bracket 41-1 are fixedly connected to the lower end of the rear end extension component 2 by bolts, the guide locking plate 41-4 is opened downward and is fixed to the bottom surface of the bracket 41-1, and the guide cone 41-2 is located at the guide locking plate 41-4 The outer side is fixed on the bottom surface of the bracket 41-1, the lower end of the guide cone 41-2 is an inverted cone structure, and the lower end of the guide cone 41-2 is adapted to the guide circular hole at the upper end of the support assembly 44, the locking cylinder 41-3 is adapted to the upper end of the locking mechanism 43 and the two ends of the locking cylinder 41-3 are fixedly connected to the side plates on the corresponding sides of the guide locking plate 41-4, and under the cooperation of the guide cone 41-2 and the locking mechanism 43 and the locking cylinder 41-3 and the locking mechanism 43, the locking cylinder 41-3 is moved up and down along the adaptation hole on the locking mechanism 43; in the above structure, the upper end of the upper bracket 41 is fixedly connected to the lower end of the rear end extension component 2 by bolts,

[0030] like Figure 3-4 As shown, the specific structure of the guide locking plate 41-4 is as follows: the cross-section of the guide locking plate 41-4 is an inverted U-shaped structure with the opening facing downward, and the lower ends of the two side plates of the guide locking plate 41-4 are provided with bent sections bent outward, and the angle between the bent section and the vertical section is 20°~30°, and the bending angle is convenient for guiding.

[0031] like Figure 3-4 As shown, the specific structure of the guide mechanism 42 is as follows: the guide mechanism 42 includes a guide bracket 42-1 and a guide wheel 42-2, the guide bracket 42-1 is an inverted L-shaped groove structure, the outer side of the lower end of the guide bracket 42-1 is fixedly connected to the frame 5, the two guide wheels 42-2 distributed up and down are located at the upper end of the guide bracket 42-1, and the guide wheels 42-2 are supported on the support assembly 44 through bolts, and under the guiding connection between the guide wheels 42-2 and the support assembly 44, the guide wheels 42-2 move up and down along the guiding direction of the support assembly 44; specifically, the structure of the guide wheel 42-2 is a steel sleeve inner wheel and a resin outer wheel arranged on the outer wheel surface of the steel sleeve inner wheel. The guide wheel 42-2 with this structure plays a guiding role and also ensures its service life.

[0032] like Figure 3-4As shown, the specific structure of the locking mechanism 43 is as follows: the locking mechanism 43 includes a hydraulic lock mounting plate 43-1 and a hydraulic lock 43-2, the hydraulic lock mounting plate 43-1 is a square structure with a middle hole opened at the upper end, and the outer walls on both sides of the hydraulic lock mounting plate 43-1 are provided with guide long slot holes, and the locking cylinder 41-3 on the guide locking plate 41-4 inserted into the upper end of the hydraulic lock mounting plate 43-1 is adapted to the guide long slot hole, the hydraulic lock 43-2 is a U-shaped groove structure with an opening arranged outward, and the hydraulic lock 43-2 is fixed on the side wall of the hydraulic lock mounting plate 43-1, and the hydraulic lock 43-2 is inserted and fixedly connected to the two side walls of the support assembly 44.

[0033] like Figure 3-4 As shown, the specific structure of the support assembly 44 is as follows: the support assembly 44 includes a U-shaped support plate 44-1 with an opening facing outward and a sealing plate 44-2 fixed to the upper end of the U-shaped support plate 44-1, the hydraulic lock 43-2 is inserted and fixedly connected to the U-shaped support plate 44-1, and the upper end surface of the sealing plate 44-2 is provided with a guide circular hole adapted to be connected to the guide cone 41-2, and long holes 44-3 are formed on the two side walls of the U-shaped support plate 44-1, and the guide wheel 42-2 located inside the U-shaped support plate 44-1 and in contact with the inner groove surface of the U-shaped support plate 44-1 is guided and supported on the U-shaped support plate 44-1 by bolts passing through the long holes 44-3, and the lower end of the U-shaped support plate 44-1 is fixedly connected to the upper end of the shock absorber 45.

[0034] like Figure 3-4 As shown, the specific structure of the lower bracket 46 is as follows: the lower bracket 46 adopts a structure in which a side plate and a plurality of ear plates fixed on the two side walls of the side plate are fixedly connected as an integral whole, the side plate of the lower bracket 46 is fixed on the frame 5, and the lower end of the shock absorber 45 is fixedly connected to the ear plate at the corresponding position.

[0035] like Figure 5 As shown, the specific structure of the rear end extension component 2 is as follows: the rear end extension component 2 includes an extension beam 7 and a reinforcement plate 6, the end of the extension beam 7 is fixed to the rear side wall of the cab 1, and the reinforcement plate 6 fixed to the upper end surface of the extension beam 7 is fixedly connected to the rear side wall of the cab 1, and the extension beam 7 is fixedly connected to the upper bracket 41 in the shock-absorbing locking device 4. The optimized structure of the rear end extension component 2 not only ensures the connection between the cab 1 and the shock-absorbing locking device 4, but also ensures the strength of the rear end extension component 2, and ensures the overall strength and stability of the cab 1.

[0036] The shock-absorbing locking devices 4 are symmetrically arranged on both sides of the frame 5. Contrary to the traditional structural arrangement, the locking mechanism 43 is located on the outside of the frame 5 to facilitate the guiding and locking of the cab 1 and the locking mechanism 43.

[0037] In this structure, when the cab 1 is falling, the upper bracket 41 installed at the rear end of the cab 1 is guided by the guide cone 41-2 and the guide circular hole on the upper part of the support assembly 44. At the same time, the locking cylinder 41-3 and the guide locking plate 41-4 are respectively matched with the guide circular hole and the guide long slot hole on the hydraulic lock mounting plate 43-1. When the guide cone 15 is fully matched with the guide circular hole, the guide mechanism 42 and the hydraulic lock 43-2 are locked and controlled by the hydraulic system to achieve the locking effect of the rear suspension shock absorption. When the vehicle is driving and the working conditions are more complicated, the cab 1 is compressed and extended in the Z-axis direction of the shock absorber 45 to achieve the shock absorption effect of the rear suspension and ensure the riding comfort.

[0038] The technical solution optimizes the structure of the rear-end extension component 2 and adopts a shock-absorbing locking device 4 to connect the rear-end extension component 2 with the frame 5 to achieve rear suspension shock absorption of the vehicle, solves the problem that the existing rear suspension point of the cab 1 cannot be connected to the rear end of the cab 1, and meets the reliability requirements of the locking mechanism 43; in addition to the guidance of the guide cone 41-2, the shock-absorbing locking device 4 is also provided with a guide locking plate 41-4 with the lower end bent outward, and the bending sections at the lower ends of both sides of the guide locking plate 41-4 are provided with angles to facilitate the guidance with the locking cylinder 41-2, so that the guiding effect is smoother and more reliable; the locking mechanism 43 in the shock-absorbing locking device 4 is an assembly structure, which is conducive to the installation and adjustment of the hydraulic lock 43-2, without the restriction of the assembly order, and the assemblability is improved while ensuring the strength of the locking mechanism 43; the structure is simple, the design is reasonable, the assembly and disassembly are convenient, the safety is reliable, the guiding effect is good, and the strength stability is effectively guaranteed.

[0039] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. The rear suspension shock-absorbing locking structure of the off-road wide-body cab is characterized by: The invention comprises a rear-end extension assembly (2) fixed to both sides of the rear-end outer wall of a cab (1) and a shock-absorbing locking device (4) arranged on both sides of a vehicle frame (5) and located behind a front axle oil-gas spring (3) on the same side, wherein the upper end of the shock-absorbing locking device (4) is connected to the rear-end extension assembly (2), and the lower end of the shock-absorbing locking device (4) is fixedly connected to the vehicle frame (5), and during the driving process of the whole vehicle, the rear suspension shock absorption of the vehicle is realized by the shock-absorbing locking device (4) having upper and lower elastic buffer amounts.

2. The rear suspension shock-absorbing locking structure of the off-road wide-body cab according to claim 1 is characterized in that: The shock absorbing locking device (4) comprises an upper bracket (41), a guide mechanism (42), a locking mechanism (43), a support assembly (44), a shock absorber (45) and a lower bracket (46); the upper portion of the upper bracket (41) is fixedly connected to the lower end of the rear end extension assembly (2); one side of the lower portion of the upper bracket (41) is connected to the locking mechanism (43) for vertical guiding, and the other side of the lower portion of the upper bracket (41) is adapted for guiding and positioning the upper end of the support assembly (44); the inner side of the support assembly (44) is connected to the locking mechanism (43); the lower end of the guide mechanism (42) is fixed to the vehicle frame (5), and the outer side of the support assembly (44) is connected to the upper end of the guide mechanism (42) for vertical movability; the lower end of the support assembly (44) is fixedly connected to the upper end of the shock absorber (45), and the lower end of the shock absorber (45) is fixedly connected to the lower bracket (46) fixed to the vehicle frame (5).

3. The rear suspension shock-absorbing locking structure of the off-road wide-body cab according to claim 2 is characterized in that: The upper bracket (41) comprises a bracket (41-1), a guide cone (41-2), a locking cylinder (41-3) and a guide locking plate (41-4); the bracket (41-1) is a structure consisting of an L-shaped plate and a vertical plate vertically fixed to the L-shaped plate and arranged parallel to the vertical plate of the L-shaped plate; the outer side of the vertical plate is provided with a reinforcing rib fixedly connected to the horizontal plate of the L-shaped plate; the vertical plate and the vertical plate of the L-shaped plate in the bracket (41-1) are fixedly connected to the lower end of the rear end extension component (2) by bolts; the guide locking plate (41-4) is arranged with an opening facing downward and is fixed to the bottom surface of the bracket (41-1); and the guide cone (41-2) is located on the guide locking plate ( The guide cone (41-4) is arranged on the outer side of the guide cone (41-4) and is fixed on the bottom surface of the bracket (41-1), the lower end of the guide cone (41-2) is an inverted cone structure, and the lower end of the guide cone (41-2) is adapted to be connected with the guide circular hole at the upper end of the support assembly (44), the locking cylinder (41-3) is adapted to be guided up and down with the upper end of the locking mechanism (43), and the two ends of the locking cylinder (41-3) are fixedly connected with the side plates on the corresponding sides of the guide locking plate (41-4), and under the cooperation of the guide cone (41-2) and the locking mechanism (43) and the locking cylinder (41-3) and the locking mechanism (43), the locking cylinder (41-3) is moved up and down along the adaptation hole on the locking mechanism (43).

4. The rear suspension shock-absorbing locking structure of the off-road wide-body cab according to claim 3 is characterized in that: The cross section of the guide locking plate (41-4) is an inverted U-shaped structure with the opening facing downwards, and the lower ends of the two side plates of the guide locking plate (41-4) are provided with bent sections bent outwards, and the angle between the bent section and the vertical section is 20° to 30°.

5. The rear suspension shock-absorbing locking structure of the off-road wide-body cab according to claim 4 is characterized in that: The guide mechanism (42) comprises a guide bracket (42-1) and a guide wheel (42-2), wherein the guide bracket (42-1) is an inverted L-shaped groove structure, the outer side of the lower end of the guide bracket (42-1) is fixedly connected to the vehicle frame (5), and the two guide wheels (42-2) distributed up and down are located at the upper end of the guide bracket (42-1), and the guide wheels (42-2) are supported on the support assembly (44) through bolts, and under the guiding connection between the guide wheels (42-2) and the support assembly (44), the guide wheels (42-2) can move up and down along the guiding direction of the support assembly (44).

6. The rear suspension shock-absorbing locking structure of the off-road wide-body cab according to claim 5, characterized in that: The guide wheel (42-2) comprises a steel sleeve inner wheel and a resin outer wheel arranged on the outer wheel surface of the steel sleeve inner wheel.

7. The rear suspension shock-absorbing locking structure of the off-road wide-body cab according to claim 6, characterized in that: The locking mechanism (43) comprises a hydraulic lock mounting plate (43-1) and a hydraulic lock (43-2); the hydraulic lock mounting plate (43-1) is a square structure with a middle hole and an opening at the upper end; and the outer walls on both sides of the hydraulic lock mounting plate (43-1) are provided with guide long slot holes, and the locking cylinder (41-3) on the guide locking plate (41-4) inserted into the upper end of the hydraulic lock mounting plate (43-1) is adapted to fit into the guide long slot holes; the hydraulic lock (43-2) is a U-shaped slot structure with an opening facing outward, and the hydraulic lock (43-2) is fixed on the side wall of the hydraulic lock mounting plate (43-1); and the hydraulic lock (43-2) is inserted and fixedly connected to the side walls of the support assembly (44).

8. The rear suspension shock-absorbing locking structure of the off-road wide-body cab according to claim 7, characterized in that: The support assembly (44) comprises a U-shaped support plate (44-1) with an opening facing outward and a sealing plate (44-2) fixed to the upper end of the U-shaped support plate (44-1); the hydraulic lock (43-2) is plug-fitted and fixedly connected to the U-shaped support plate (44-1); the upper end surface of the sealing plate (44-2) is provided with a guide circular hole adapted to be connected to the guide cone (41-2); both side walls of the U-shaped support plate (44-1) are provided with elongated holes (44-3); and a guide wheel (42-2) located inside the U-shaped support plate (44-1) and in contact with the inner groove surface of the U-shaped support plate (44-1) is guided and supported on the U-shaped support plate (44-1) by bolts passing through the elongated holes (44-3); and the lower end of the U-shaped support plate (44-1) is fixedly connected to the upper end of the shock absorber (45).

9. The rear suspension shock-absorbing locking structure of the off-road wide-body cab according to claim 8, characterized in that: The lower bracket (46) adopts a structure in which a side plate and a plurality of ear plates fixed on both side walls of the side plate are fixedly connected as one body; the side plate of the lower bracket (46) is fixed on the vehicle frame (5), and the lower end of the shock absorber (45) is fixedly connected to the ear plates at corresponding positions.

10. The rear suspension shock-absorbing locking structure of the off-road wide-body cab according to any one of claims 1 to 9, characterized in that: The rear end extension assembly (2) comprises an extension crossbeam (7) and a reinforcement plate (6); the end of the extension crossbeam (7) is fixed to the rear side wall of the cab (1); the reinforcement plate (6) fixed to the upper end surface of the extension crossbeam (7) is fixedly connected to the rear side wall of the cab (1); and the extension crossbeam (7) is fixedly connected to the upper bracket (41) in the shock-absorbing locking device (4).

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