Engineering machinery cab turnover supporting mechanism

Abstract

The invention relates to the technical field of engineering machinery cab turnover supporting, in particular to an engineering machinery cab turnover supporting mechanism which comprises a turnover support used for installing and connecting a chassis and a vehicle head, a limiting rod is fixedly assembled at the connecting position of the turnover support and the vehicle head, and a disc base driven by a motor is assembled on the vehicle chassis. A slidable sliding plate seat is assembled on the surface of the disc seat, and two baffles are symmetrically arranged on the surface of the disc seat; by arranging the equiangular spiral column, the supporting spring, the reset spring and the sliding plate seat, in the whole using process, no matter the vehicle head rotates to the state that the gravity center deviates from the undercarriage or deviates from the undercarriage, when external force on the vehicle head disappears and the rotating speed difference rapidly extrudes the equiangular spiral column to move horizontally, the position of the equiangular spiral column is locked through a T-shaped rod and a limiting block, and the position of the equiangular spiral column is locked; and when external force is applied again, the supporting spring enables the equiangular spiral column to return to the initial position for repeated use, and the use process is more convenient and faster.

Description

Technical Field

[0001] The present invention relates to the technical field of cab flipping supports for construction machinery, and specifically provides a cab flipping support mechanism for construction machinery. Background Art

[0002] The cab flipping bracket assembly is an important device used in vehicles such as construction machinery and trucks. It is mainly used to realize the flipping function of the cab, facilitating the inspection, maintenance, and repair of components such as the engine and transmission system inside the vehicle. Its components include a flipping frame body, a hinged mechanism, a power device, a locking device, and a limiting device, etc. Among them, the flipping frame body is installed and connected to the cab to provide support for the cab.

[0003] The anti-accidental fall-back device is an essential part of cab flipping. It is mainly to improve the safety during flipping. There are also many types of anti-accidental fall-back devices to choose from, including mechanical pins and ratchet and pawl locks. The mechanical pin method requires pinning after the vehicle head rotates a fixed angle, making it difficult to handle sudden falling situations. Although the ratchet and pawl locking method can prevent the accidental fall-back of the vehicle head, it is difficult to lock when the rotation angle of the vehicle head is biased outward. Summary of the Invention

[0004] To solve the above problems, the present invention provides a cab flipping support mechanism for construction machinery to solve the problems mentioned in the above background art.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A cab flipping support mechanism for construction machinery includes a flipping bracket for installing and connecting the chassis and the vehicle head. A limiting rod is fixedly assembled at the position where the flipping bracket is connected to the vehicle head. A disc seat driven by a motor is assembled on the vehicle chassis. A slidable slide seat is assembled on the surface of the disc seat. Two baffles are symmetrically arranged on the surface of the disc seat. An elastic component is assembled between the baffle and the disc seat to hinder the movement of the slide seat and make the slide seat return to the initial state when not subjected to external force.

[0006] Two equiangular spiral columns are assembled on the surface of the slide seat for limiting in two states where the center of gravity of the vehicle head is biased towards the chassis and away from the chassis. The two equiangular spiral columns respectively abut against the centrally symmetric positions on the surface of the limiting rod. The vertical height from the lowest end to the highest end of the equiangular spiral column is greater than the length of the limiting rod.

[0007] Reinforcing components are assembled on the surfaces of the two equiangular spiral columns to improve the strength of the equiangular spiral columns.

[0008] Preferably, the elastic component includes two guide rods for guiding the skateboard seat. The two guide rods are symmetrically assembled on both sides of the skateboard seat. One end of each guide rod is fixed on the surface of the baffle, and the other end of the guide rod movably penetrates through the skateboard seat. A support spring is sleeved on the surface of the guide rod, and the support spring abuts against the surfaces of the baffle and the skateboard seat.

[0009] Preferably, the reinforcement component includes a plurality of support rods assembled on the surface of the skateboard seat. The tops of the plurality of support rods are respectively fixed on the surfaces of two equiangular spiral columns, and the support rods are not located on the movement path of the limit rod.

[0010] Preferably, the heights at which the two equiangular spiral columns act on the surface of the limit rod are different. Two rollers that can rotate in different directions are sleeved on the surface of the limit rod through bearings, and the surfaces of the two rollers respectively abut against the surfaces of the two equiangular spiral columns.

[0011] Preferably, two grooves are formed on the surface of the disc seat, which are respectively located on the movement paths of the skateboard seat in different directions. Two mounting grooves are symmetrically formed on the surface of the skateboard seat. A limit block is installed in the mounting groove through a connecting spring. The two sides of the limit block perpendicular to the movement path are symmetrically inclined planes, and the width of the side close to the mounting groove is greater than the width of the side far from the mounting groove. The two sides of the limit block parallel to the movement path are vertical planes, and the internal shape of the groove is adapted to the shape of the limit block.

[0012] Preferably, an overload protection mechanism is assembled on the surface of the disc seat for overload protection of the motor.

[0013] Preferably, the overload protection mechanism includes through holes symmetrically formed on the surface of the disc seat. The through holes communicate with the inside of the groove. A movable T-shaped rod is assembled in the through hole through a return spring. The top of the T-shaped rod extends into the inside of the groove, and the bottom of the T-shaped rod is flush with the bottom of the disc seat;

[0014] A ring seat is fixedly assembled on the surface of the vehicle disc base. The center of the ring seat and the center of the disc seat are located on the same vertical line. A plurality of annularly arrayed card slots are formed on the surface of the ring seat, and the internal shape of the card slot is adapted to the shape of the end of the T-shaped rod.

[0015] Preferably, the flipping bracket includes a U-shaped shaft seat assembled on the chassis. Two rotatable straight plate seats are sleeved on the surface of the U-shaped shaft seat and are assembled on the surface of the vehicle head. The limit rod and the straight plate seat are integrally formed structures. Two rotatable L-shaped plate seats are sleeved on the surface of the U-shaped shaft seat and are assembled on the surface of the vehicle disc.

[0016] Preferably, two sets of the disc seat, the equiangular spiral columns and the skateboard seat are provided, and are respectively located at the symmetrical positions of the U-shaped shaft seat.

[0017] Preferably, a gear is assembled on the lower surface of the disc seat through a fixed shaft, the two gears are connected by a toothed belt, the gears and the toothed belt are assembled inside a protective cover, the protective cover is assembled on the chassis, and the annular seat is assembled on the surface of the protective cover.

[0018] 1. The above technical solution has the following advantages or beneficial effects: The present invention provides a turning support mechanism for an engineering machinery cab. By setting two equiangular spiral columns, a slide plate seat, a disc seat and an annular seat, when the external force on the vehicle head disappears, the vehicle head immediately increases its rotational speed due to its own gravity. Due to the difference between the rotational speed of the motor and the rotational speed of the vehicle head, the limit rod quickly squeezes the equiangular spiral column, and the limit block is stuck inside the groove. At the same time, the T-shaped rod is squeezed and stuck inside the card slot, thereby realizing the locking of the vehicle head to improve the applicable range of preventing the vehicle head from falling.

[0019] 2. The above technical solution has the following advantages or beneficial effects: The present invention provides a turning support mechanism for an engineering machinery cab. By setting a support spring, a connecting spring and a reset spring, the elastic force of the support spring is greater than that of the connecting spring which is greater than that of the reset spring. When the external force is restored to the vehicle head, the support spring squeezes the slide plate seat back to the initial position, the limit block is squeezed into the installation groove, and the T-shaped rod also returns to the initial position, without the need for additional manual operation control, improving the safety and convenience of use.

[0020] 3. The above technical solution has the following advantages or beneficial effects: The present invention provides a turning support mechanism for an engineering machinery cab. By setting an equiangular spiral column, a support spring, a reset spring and a slide plate seat, during the entire use process, regardless of whether the vehicle head rotates to a state where the center of gravity is biased towards or away from the vehicle disc, when the external force on the vehicle head disappears, the rotational speed difference will quickly squeeze the equiangular spiral column to translate, and the position of the equiangular spiral column is locked by the T-shaped rod and the limit block. When the external force is reapplied, the support spring will make the equiangular spiral column return to the initial position for repeated use, making the use process more convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, the present invention and its features, shape and advantages will become more obvious. The same reference numerals indicate the same parts in all the drawings. The drawings are not deliberately drawn to scale, and the emphasis is on showing the gist of the present invention.

[0022] Figure 1 is a three-dimensional structural schematic diagram of a turning support mechanism for an engineering machinery cab provided by the present invention.

[0023] Figure 2 is a structural schematic diagram of the meshing state of the gear and the toothed belt.

[0024] Figure 3 It is a schematic three-dimensional structure diagram of the flipping bracket.

[0025] Figure 4 It is a schematic structure diagram of the installation state of the disc seat and the slide plate seat.

[0026] Figure 5 It is a schematic structural state diagram of the equiangular spiral column acting on the limiting rod.

[0027] Figure 6 It is Figure 4 front sectional view.

[0028] Figure 7 It is a schematic structure diagram of the disassembled state of the slide plate seat and the limiting block.

[0029] Figure 8 Schematic three-dimensional structure diagram of the disc seat.

[0030] Figure 9 It is a schematic three-dimensional structure diagram of the annular seat.

[0031] In the figure: 1. Limiting rod; 2. Disc seat; 3. Slide plate seat; 4. Baffle; 5. Equiangular spiral column; 6. Guide rod; 7. Support spring; 8. Support rod; 9. Roller; 10. Groove; 11. Installation groove; 12. Connecting spring; 13. Limiting block; 14. Through hole; 15. Return spring; 16. T-shaped rod; 17. Annular seat; 18. Card slot; 19. U-shaped shaft seat; 20. Straight plate seat; 21. L-shaped plate seat; 22. Gear; 23. Toothed belt; 24. Protective cover. Specific implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] In order to enable those in the technical field to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] For the convenience of overhauling the vehicle chassis, the cab of construction machinery needs to have a flipping function, and its external driving force is usually in the form of hydraulic or electric, Figure 1 A flipping support mechanism for the cab of construction machinery is disclosed, including but not limited to driving methods such as hydraulic and electric. The cab head is usually installed on the vehicle chassis through a flipping bracket.

[0035] Such as Figure 3As shown in the figure, the flipping bracket includes a metal U-shaped shaft seat 19. The U-shaped shaft seat 19 is assembled on the vehicle chassis and has a certain strength to provide support for the cab front. Two rotatable straight plate seats 20 are sleeved on the surface of the U-shaped shaft seat 19. The two straight plate seats 20 are located at symmetrical positions of the U-shaped shaft seat 19. A connecting pipe is arranged between the two straight plate seats 20. Mounting holes are provided on the surface of the straight plate seat 20, and the front of the vehicle is fixed at the positions of the mounting holes by bolts. The whole is sleeved on the surface of the U-shaped shaft seat 19. Limiting rods 1 integrally formed with the surface of the two straight plate seats 20 are provided. The limiting rods 1 are symmetrically arranged with the straight plates on the straight plate seats 20. At the same time, a rotatable L-shaped plate seat 21 is also sleeved and assembled on the surface of the U-shaped shaft seat 19. Mounting holes are also provided on its surface for fixing the L-shaped plate seat 21 on the vehicle chassis. The L-shaped plate seat 21 is installed and fixed on the U-shaped shaft seat 19 through a bearing, and the bending direction is vertically downward, leaving a large space below the U-shaped shaft seat 19 for installing an auxiliary mechanism to increase the support force.

[0036] As Figure 1 and Figure 4 shown in the figure, a disc seat 2 is assembled on the vehicle chassis. The disc seat 2 is driven to rotate by a motor (not shown in the figure). A slidable slide seat 3 is assembled on the surface of the disc seat 2. The sliding path direction of the slide seat 3 is perpendicular to the rotation direction of the limiting rod 1. Two baffle plates 4 integrally formed are provided on the surface of the disc seat 2. The two baffle plates 4 are centrosymmetrically arranged. Two equiangular spiral columns 5 are assembled on the surface of the slide seat 3. The minimum vertical height from the lowest end to the highest end of the equiangular spiral column 5 is the length of the limiting rod 1, that is, when the limiting rod 1 rotates completely horizontally, the end of the limiting rod 1 just reaches the highest position of the equiangular spiral column 5. The two equiangular spiral columns 5 respectively abut against the centrosymmetric positions on the surface of the limiting rod 1. To improve the support strength of the equiangular spiral column 5, a plurality of support rods 8 are provided on the surface of the slide seat 3. The tops of the plurality of support rods 8 are respectively fixed on the surfaces of the two equiangular spiral columns 5. The support rods 8 are not located on the movement path of the limiting rod 1.

[0037] It should be noted that the centrosymmetric position at this time is not that the two equiangular spiral columns 5 are symmetrically installed with the axis of the limiting rod 1 as the center. When the limiting rod 1 rotates, its end continuously rises. To ensure the smooth rotation of the limiting rod 1, it is necessary to rotate the disc seat 2, indirectly driving the slide seat 3 to rotate. When rotating, the limiting rod 1 always abuts against the position between the two equiangular spiral columns 5. At any arbitrary moment when the limiting rod 1 rotates, the contact positions of the limiting rod 1 with the two equiangular spiral columns 5 are centrosymmetric with the axis of the limiting rod 1 as the center.

[0038] As Figure 5As shown, during the rotation of the limit rod 1, it will continuously rub against the logarithmic spiral column 5. To improve the service life of the limit rod 1 and reduce the load pressure of hydraulic or electric drive, two rollers 9 are sleeved on the surface of the limit rod 1 through two bearings. The two rollers 9 can rotate in different directions. It should be noted that at this state, the heights at which the two logarithmic spiral columns 5 act on the limit rod 1 at the same moment are different, so that the acting heights of the two logarithmic spiral columns 5 are different. At this time, the sliding friction can be converted into rolling friction, and the frictional force is reduced.

[0039] At this time, when the center of gravity of the cab head during rotation is directly above the inner side of the vehicle disc, the rotation direction of the accidental detachment of the cab head during driving will be towards one side of the vehicle disc. When the center of gravity of the cab head during rotation is directly above the outer side of the vehicle disc, the rotation direction of the accidental detachment of the cab head will be towards the outside of the vehicle disc. No matter which side it tilts towards, the falling speed of the head will be much greater than the driving speed of the motor. At this time, the limit rod 1 will tilt and push any one of the logarithmic spiral columns 5, and the slide plate seat 3 will slide until it abuts against the surface of the baffle 4.

[0040] As Figure 4 , Figures 7 - 8 shown, since the surface of the logarithmic spiral column 5 is an arc surface, when the extrusion force of the limit rod 1 is too large, it may push the slide plate seat 3 to rotate. To ensure the support stability provided by the slide plate seat 3, two grooves 10 are opened on the surface of the disc seat 2, which are respectively located on the moving paths of different directions of the slide plate seat 3 to adapt to the two states where the center of gravity of the head is biased towards the vehicle disc and away from the vehicle disc. Two mounting grooves 11 are symmetrically opened on the surface of the slide plate seat 3. A limit block 13 is installed in the mounting groove 11 through a connecting spring 12. The two sides of the limit block 13 perpendicular to the moving path are arranged as symmetric inclined surfaces, and the width of the side close to the mounting groove 11 is greater than the width of the side far from the mounting groove 11. The two sides of the limit block 13 parallel to the moving path are vertical surfaces. The internal shape of the groove 10 is adapted to the shape of the limit block 13, so as to ensure that when the limit block 13 on the slide plate seat 3 moves and is stuck inside the groove 10, the slide plate seat 3 can be opened along the path direction and will be stuck in the direction perpendicular to the path. At this time, the rotation of the slide plate seat 3 will be prevented.

[0041] However, in this state, the slide plate seat 3 and the disc seat 2 are integrated. The force generated by the rotation of the logarithmic spiral column 5 will be directly applied to the motor. At this time, the downward falling force of the head acts indirectly on the motor shaft, which may cause the motor to operate overloaded and affect the service life of the motor.

[0042] As Figures 6 - 9As shown, two centrally symmetrical through holes 14 are provided on the surface of the disc seat 2, and the through holes 14 are connected to the inside of the groove 10 and to the outside. A movable T-shaped rod 16 is assembled inside the through hole 14 through a return spring 15, and the T-shaped rod 16 can move longitudinally. It should be noted that the elasticity of the connecting spring 12 is greater than the elasticity of the return spring 15. When the limit block 13 moves and is inserted into the inside of the groove 10, the limit block 13 squeezes the T-shaped rod 16 to move downward, and an annular seat 17 is fixedly assembled on the surface of the disc base. The annular seat 17 The center of the circle is located on the same vertical line as the center of the disc seat 2. A plurality of annular array grooves 18 are provided on the surface of the annular seat 17. The internal shape of the groove 18 is adapted to the end shape of the T-shaped rod 16. If the position of the through hole 14 is not aligned with the position of the groove 18, the reset spring 15 is in an uncompressed state, and the limit rod 1 may squeeze the equiangular helical column 5 to rotate until the through hole 14 is aligned with the position of the groove 18. The T-shaped rod 16 is pushed by the extrusion force of the reset spring 15 to be stuck in the inside of the groove 18, thereby providing support stability.

[0043] like Figure 4 and Figure 6 As shown, in order to ensure that after the external force on the front of the vehicle is restored, the skateboard seat 3 returns to the initial state and continues to provide protective support, two guide rods 6 are assembled at the central symmetrical position of the skateboard seat 3 to guide the movement of the skateboard seat 3. One end of the guide rod 6 is fixed to the surface of the baffle 4, and the other end of the guide rod 6 movably penetrates the skateboard seat 3. A support spring 7 is sleeved on the surface of the guide rod 6, and the support spring 7 rests on the surfaces of the baffle 4 and the skateboard seat 3. The elastic force of the support spring 7 is greater than the elastic force of the guide connection spring 12. At this time, when the external force pushes the front of the vehicle to rotate, the force of the limit rod 1 against the surface of the equiangular helical column 5 gradually decreases, and the elastic force of the support spring 7 pushes the skateboard seat 3 back to the initial state and continues to be put into use.

[0044] like Figure 2 As shown, in order to ensure that the two disc seats 2 can provide braking support at the same time and ensure stability during use, a gear 22 is installed on the lower surface of the disc seat 2 through a fixed shaft, and the two gears 22 are connected by a toothed belt 23. The gear 22 and the toothed belt 23 are installed inside the protective cover 24, the protective cover 24 is installed on the chassis, and the annular seat 17 is installed on the surface of the protective cover 24.

[0045] The present invention provides a cab tilting support mechanism for construction machinery. During the rotation of the entire logarithmic spiral column 5, no matter what angle the limiting rod 1 rotates to, as long as the external force on the vehicle head disappears, the rotational speed of the vehicle head will immediately increase. Due to the difference between the motor speed and the vehicle head speed, the limiting rod 1 quickly squeezes the logarithmic spiral column 5, the support spring 7 is compressed, the limiting block 13 is stuck inside the groove 10, and at the same time, the T-shaped rod 16 is squeezed and stuck inside the card slot 18, thereby achieving the locking of the vehicle head. And when the vehicle head resumes external power supply, the support spring 7 squeezes the slide plate seat 3 back to the initial position, the limiting block 13 is squeezed into the inside of the installation groove 11, and the T-shaped rod 16 also returns to the initial position and continues to be put into use.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0047] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0048] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments. The equipment and structures not described in detail should be understood to be implemented in a common manner in the art; any person skilled in the art can make many possible changes and modifications without departing from the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes, which does not affect the essence of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the technical solution of the present invention still fall within the scope of the protection of the technical solution of the present invention.

Claims

1. A tilting support mechanism for a cab of an engineering machinery, comprising a tilting bracket for mounting and connecting a chassis and a vehicle head, characterized in that: The position where the flip bracket is connected to the vehicle head is fixedly equipped with a limit rod, and a disc seat driven by a motor is installed on the vehicle chassis, and a slidable skateboard seat is installed on the surface of the disc seat, and two baffles are symmetrically arranged on the surface of the disc seat, and an elastic component is installed between the baffle and the disc seat to hinder the movement of the skateboard seat, so that the skateboard seat returns to the initial state when no external force is applied; The surface of the skateboard seat is equipped with two equiangular spiral columns, which are used to limit the center of gravity of the front of the skateboard when it is biased toward the chassis and away from the chassis. The two equiangular spiral columns are respectively against the central symmetrical positions of the surface of the limiting rod, and the vertical height from the lowest end to the top end of the equiangular spiral column is greater than the length of the limiting rod; The surfaces of the two equiangular spiral columns are both equipped with reinforcement components for improving the strength of the equiangular spiral columns.

2. The construction machinery cab flip support mechanism according to claim 1, characterized in that: The elastic component includes two guide rods for guiding the skateboard seat, the two guide rods are symmetrically assembled on both sides of the skateboard seat, one end of the guide rod is fixed to the surface of the baffle, and the other end of the guide rod movably penetrates the skateboard seat, and the surface of the guide rod is sleeved with a support spring, which rests on the surface of the baffle and the skateboard seat.

3. The construction machinery cab flip support mechanism according to claim 1, characterized in that: The reinforcement assembly includes a plurality of support rods mounted on the surface of the skateboard seat, the tops of the plurality of support rods are respectively fixed on the surfaces of two equiangular spiral columns, and the support rods are not located on the movement path of the limiting rod.

4. The construction machinery cab flip support mechanism according to claim 3, characterized in that: The two equiangular helical columns act at different heights on the surface of the limiting rod. The surface of the limiting rod is connected to two rollers that can rotate in different directions through a bearing sleeve, and the surfaces of the two rollers respectively abut against the surfaces of the two equiangular helical columns.

5. The construction machinery cab flip support mechanism according to claim 1, characterized in that: Two grooves are provided on the surface of the disc seat, which are respectively located on the moving paths of the skateboard seat in different directions. Two installation grooves are symmetrically provided on the surface of the skateboard seat. A limit block is installed inside the installation groove through a connecting spring. The limit block is arranged to be symmetrically inclined at both sides perpendicular to the moving path, and the width of the side close to the installation groove is greater than the width of the side away from the installation groove. The limit block is parallel to both sides of the moving path as vertical surfaces, and the internal shape of the groove is adapted to the shape of the limit block.

6. The construction machinery cab flip support mechanism according to claim 1, characterized in that: The surface of the disc seat is equipped with an overload protection mechanism for overload protection of the motor.

7. The construction machinery cab flip support mechanism according to claim 6, characterized in that: The overload protection mechanism comprises a through hole centrally and symmetrically opened on the surface of the disc seat, the through hole being connected to the inside of the groove, a movable T-shaped rod being installed inside the through hole via a return spring, the top of the T-shaped rod extending to the inside of the groove, and the bottom of the T-shaped rod being flush with the bottom of the disc seat; An annular seat is fixedly mounted on the surface of the wheel base, the center of which is on the same vertical line as the center of the disc seat, and a plurality of annular array grooves are provided on the surface of the annular seat, the internal shape of which matches the end shape of the T-bar.

8. The construction machinery cab flip support mechanism according to claim 1, characterized in that: The flip bracket includes a U-shaped axle seat mounted on the chassis, the surface of the U-shaped axle seat is sleeved with two rotatable straight plate seats, which are mounted on the surface of the vehicle front, the limit rod and the straight plate seat are an integrally formed structure, and the surface of the U-shaped axle seat is sleeved with two rotatable L-shaped plate seats, which are mounted on the surface of the vehicle disc.

9. The construction machinery cab flip support mechanism according to claim 8, characterized in that: The disc seat, the equiangular spiral column and the slide plate seat are each provided with two groups, which are respectively located at symmetrical positions of the U-shaped shaft seat.

10. The construction machinery cab flip support mechanism according to claim 7, characterized in that: The lower surface of the disc seat is equipped with a gear through a fixed shaft, the two gears are connected through a toothed belt transmission, the gear and the toothed belt are assembled inside the protective cover, the protective cover is assembled on the chassis, and the annular seat is assembled on the surface of the protective cover.

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