A workpiece flipping system and a vehicle with a locking shock absorption device

Abstract

The present invention discloses a workpiece turnover system and a vehicle with a locking and damping device, comprising a base, a workpiece, a lifting operating system, and a locking and damping device; the workpiece is hinged to the base; one end of the lifting operating system is hinged to the base, and the other end is hinged to the workpiece, and the turnover of the workpiece on the base is realized through the lifting operating system; the locking and damping device is installed on the base, and the workpiece can be fixed on the base through the locking and damping device after the workpiece falls back to the base; when the whole system encounters vibration, the workpiece on the base can effectively reduce the vibration through the locking and damping device; when it is necessary to turnover the workpiece, the locking and damping device is released, and the workpiece is turned over to the required position through the lifting operating system. The present invention can realize functions such as turnover, fall-back, locking, and damping of the workpiece, and is applied to the turnover locking and damping of components such as the cab, hood, and cargo box of a vehicle, and can also be applied to the vibration control of equipment such as vibrating screening, with convenient, safe, and reliable operation.

Description

Technical Field

[0001] The invention relates to a workpiece turning system with a locking and shock-absorbing device, belonging to the field of turning systems. Background Art

[0002] There are many pipelines and some control components arranged under the cab of engineering vehicles. The cab needs to be lifted for each inspection and maintenance. Since many pipelines are fixed on the cab, it causes great trouble to lift them. At the same time, frequent lifting can easily cause pipeline joints to loosen or pipelines to break.

[0003] In response to the more serious phenomenon of the above problems, the cab is generally required to have a flip function. The existing technology usually uses a simple cab base that is hinged on one side to the frame to form a structure that can be flipped on one side. However, the cab is often flipped by lifting from one side, which requires special lifting equipment and causes problems for regular maintenance. How to quickly flip the cab for vehicle inspection and maintenance, while reducing the vibration caused by the cab during vehicle operation and providing a more comfortable driving experience for drivers and passengers has always been a problem that has plagued automobile companies. Summary of the Invention

[0004] In order to address the shortcomings of the existing technology, the purpose of the present invention is to provide a lifting system for workpiece flipping with a shock-absorbing locking device, which can realize functions such as flipping, falling back, locking, and shock absorption of the workpiece. The workpiece flipping system can be used for flipping similar components such as cabs, hoods, cargo boxes on vehicles, and can also be used for vibration control of large objects such as vibration screening equipment. It is easy to operate, safe, and reliable.

[0005] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0006] A first aspect of the present invention discloses a workpiece turning system with a locking and damping device, comprising:

[0007] base;

[0008] a workpiece hinged to the base;

[0009] A lifting operating system, one end of which is fixed to the base and the other end is hinged to the workpiece, and the lifting operating system is used to realize the turning of the workpiece on the base;

[0010] A locking shock-absorbing device is installed on the base. When the workpiece falls back onto the base, the workpiece is fixed on the base through the locking shock-absorbing device. When the base encounters vibration, the workpiece on the base is reduced in vibration through the locking shock-absorbing device. When the workpiece needs to be flipped, the locking shock-absorbing device is released and the workpiece is flipped to the desired position through the lifting operating system.

[0011] In some embodiments, the locking and damping device includes:

[0012] Two side supports, which are installed at intervals on the side surface of the base;

[0013] An intermediate support, which is of a U-shaped structure, arranged between the two side supports and connected to the base;

[0014] A roller, which is rotatably supported in the groove of the intermediate support;

[0015] A support leg, which is arranged between the two side supports, the roller is located in the support leg, and the roller can move in the support leg;

[0016] A shock absorber, which is arranged on both sides of the support leg, the lower end of the shock absorber is hinged to the side support, and the upper end of the shock absorber is hinged to the support; when the workpiece presses on the support leg, the shock absorber contracts to make the support leg move downward; when the vibration of the base is transmitted to the workpiece, the vibration amplitude of the workpiece is reduced through the buffering of the support leg;

[0017] A lock, which is fixed on the outer surface of the support leg and cooperates with the card slot on the workpiece to connect the workpiece and the base together. When the workpiece needs to be flipped, the lock is opened to realize the flipping of the workpiece.

[0018] In some embodiments, the locking and damping device further includes:

[0019] A damping pad, which is fixed on the upper surface of the support leg.

[0020] In some embodiments, the support leg is of a T-shaped structure and includes:

[0021] A C-shaped groove plate, which is a two-sided bent plate, and round holes are opened on the bent edges for inserting a pin shaft;

[0022] An L-shaped cover plate, which is bent on one side and covers above the C-shaped groove plate. Round holes are opened on the L-shaped cover plate for installing the damping pad;

[0023] Side plates, which are installed at both ends of the L-shaped cover plate. Round holes opened on the side plates are used to cooperate with the round holes on the bent edges of the C-shaped groove plate to insert the pin shaft;

[0024] A baffle plate, which is located inside the C-shaped groove plate. The roller is installed in the installation space formed by the baffle plate and the C-shaped groove plate. The gap of this installation space is larger than the diameter of the roller, so that the support leg can move up and down, left and right relative to the roller;

[0025] A backing plate, which is installed outside the C-shaped groove plate and is used to fix the lock.

[0026] In some embodiments, the lock includes:

[0027] A base, which is used to be installed on the support leg;

[0028] A tongue, one end of which is hinged to the base, and the other end can rotate around the hinge point;

[0029] A connecting rod passes through the tongue, and there is a clearance fit between the two. A through hole is provided on both sides of the connecting rod;

[0030] A U-shaped hook, the free ends on both sides of which pass through the through holes on both sides of the connecting rod respectively, and the nuts located on both sides of the connecting rod on the U-shaped hook are tightened to complete the positioning of the U-shaped hook on the connecting rod.

[0031] In some embodiments, the side support is a groove-shaped structure that is narrow at the front and wide at the rear. A pair of symmetrically arranged round holes are provided at the narrow ends of both sides of the side support for inserting a pin shaft; bolt holes are provided on the bottom edge of the side support.

[0032] In some embodiments, the workpiece includes a workpiece body. An articulated support I that can rotate around a turning seat, a support II for fixing the telescopic shaft of the lifting cylinder, and a clamping groove for locking and tensioning are provided on the workpiece body.

[0033] In some embodiments, the workpiece is hinged to the base through a turning seat; the turning seat includes a base and a pin shaft; the base is composed of a bottom plate and side plates symmetrically arranged on both sides of the bottom plate. The bottom surface length of the side plates is slightly less than the long side length of the base. One side surface of the side plate close to the wide side of the bottom plate is set as an inclined surface inclined towards the other wide side of the bottom plate. The other side surface of the side plate opposite to the inclined surface protrudes outward. A round hole is provided at each protruding part of the two side plates for inserting a pin shaft.

[0034] In some embodiments, a mounting seat is installed at the round hole on the outer side surface of any one side plate. A U-shaped groove is provided on the top surface of the mounting seat; the pin shaft is a stepped shaft, which is respectively composed of a backing plate at the shaft head, an intermediate shaft, and an external thread at the shaft tail; when the pin shaft is inserted into the two side plates, the backing plate at the shaft head is in the U-shaped groove of the mounting seat, and the outer contour of the backing plate is the same as the outer contour of the U-shaped groove of the mounting seat. The intermediate shaft is located between the two side plates. A nut is screwed on the external thread at the shaft tail. A circle of evenly spaced open slots is provided on the edge of the end of the nut away from the side plate. A radial through hole is provided in the external thread at the shaft tail. After the split pin penetrates into the open slot and the radial through hole, axial limit of the nut is completed.

[0035] In some embodiments, a plurality of radial through holes are provided at intervals on the intermediate shaft. An axial channel is provided at the shaft head, and the axial channel is shorter than the intermediate shaft. The axial channel is connected to the plurality of radial through holes; an internal thread is provided at the inlet end of the axial channel for assembling a grease nipple.

[0036] In some embodiments, the lifting operating system includes a manual hydraulic pump, a lifting cylinder, an oil inlet pipe, an oil return pipe, a lifting seat, and an operating rod; one end of the lifting cylinder is connected to the base through the lifting seat, and the other end is connected to the workpiece through a cylinder pin shaft; the manual hydraulic pump is connected to the lifting cylinder through the oil inlet pipe and the oil return pipe to control the extension and shortening of the lifting cylinder.

[0037] In some embodiments, there are two locking and damping devices, which are symmetrically installed on both side surfaces of the base.

[0038] The second aspect of the present invention discloses a vehicle equipped with the above workpiece flipping system with a locking and damping device; wherein, the workpiece is a cab, and the base is a vehicle frame.

[0039] In some embodiments, the vehicle includes a mining dump truck.

[0040] Advantages of the present invention:

[0041] The present invention can realize functions such as flipping, falling back, and earthquake resistance of the workpiece. When in use, open the lock, and shake the hydraulic cylinder to easily flip the workpiece to the designated position. When falling back, convert the oil circuit through the one-way valve to flip the workpiece back to the designated position, and lock the buckle to lock the workpiece on the base. When the base is vibrated, the locking and damping device can reduce the vibration transmitted to the workpiece through the helical spring shock absorber, thereby protecting the workpiece from the harm caused by vibration. The present invention can be applied to the flipping limit damping of similar components such as cabs, hoods, and cargo boxes on vehicles, and can also be used for the flipping of similar large components in factories and workshops, with convenient, safe, and reliable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings, as a part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention, but do not constitute an improper limitation to the present invention. Obviously, the drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0043] In the drawings:

[0044] Figure 1 is a schematic structural diagram of the workpiece flipping system assembly described in the present invention;

[0045] Figure 2 is a schematic structural diagram of the workpiece described in the present invention;

[0046] Figure 3 is a schematic structural diagram of the damping and locking device described in the present invention Figure 1 ;

[0047] Figure 4Schematic diagram of the shock-absorbing locking device according to the present invention Figure 2 ;

[0048] Figure 5 Schematic diagram of the support leg structure according to the present invention;

[0049] Figure 6 Schematic diagram of the structure when the workpiece is locked according to the present invention;

[0050] Figure 7 Schematic diagram of the workpiece flipping and lifting operating system according to the present invention;

[0051] Figure 8 System schematic diagram when the lifting operating system of the present invention is lifting;

[0052] Figure 9 System schematic diagram when the lifting operating system of the present invention is descending;

[0053] Figure 10 Schematic diagram of the flipping seat structure according to the present invention;

[0054] Figure 11 Schematic diagram of the pin shaft structure of the flipping seat according to the present invention;

[0055] Figure 12 Cross-sectional view of the pin shaft structure of the flipping seat according to the present invention.

[0056] Explanation of reference numerals: 1, workpiece; 2, lifting operating system; 3, base; 4, shock-absorbing locking device; 5, flipping seat;

[0057] 1-1, workpiece body; 1-2, hinge support I; 1-3, support II; 1-4, card slot;

[0058] 2-1, lifting cylinder; 2-2, lifting seat; 2-3, cylinder pin shaft; 2-4, retaining plate; 2-5, split pin; 2-6, oil pipe I; 2-7, oil pipe II; 2-8, manual pump; 2-9, hand rocker; 2-10, pump seat;

[0059] 4-1, helical spring shock absorber; 4-2, T-shaped support leg; 4-3, shock pad; 4-4, side support; 4-5, intermediate support; 4-6, lock; 4-7, roller;

[0060] 4-21, C-shaped groove plate; 4-22, L-shaped cover plate; 4-23, side plate; 4-24, baffle; 4-25, backing plate;

[0061] 5-1, base; 5-2, pin shaft; 5-3, nut; 5-4, split pin; 5-5, grease nipple.

[0062] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the inventive concept in any way, but rather to illustrate the concept of the present invention to those skilled in the art by reference to specific embodiments. Detailed Embodiments

[0063] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0064] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and 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.

[0065] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" 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. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] As Figure 1 shown, a workpiece flipping system with a shock-absorbing locking device includes a workpiece 1, a lifting operating system 2, a base 3, a shock-absorbing locking device 4, and a flipping seat 5; the workpiece 1 is hinged to the base 3 through the flipping seat 5; both ends of the lifting cylinder 2-1 of the lifting operating system 2 connect the workpiece 1 and the base 3, and the workpiece 1 is flipped on the base 3 through the lifting operating system 2; the shock-absorbing locking device 4 is arranged on both sides of the base 3. After the workpiece 1 falls back onto the base 3, the workpiece 1 can be locked to the shock-absorbing device 4 through the lock catch 4-6 on the shock-absorbing locking device 4, making the workpiece 1 and the base 3 an integral whole; when the workpiece 1 needs to be flipped again next time, the lock catch 4-6 is opened, and the lifting operating system is repeated to achieve the flipping of the workpiece 1 again.

[0067] It should be noted that the workpiece 1 can be a cab, a hood on a vehicle, or a similar larger workpiece, and the base 3 can be a vehicle frame or a maintenance platform in a workshop or other similar structures.

[0068] As Figure 2As shown in the figure, the workpiece 1 includes a workpiece body 1-1, on which there are a hinge support I 1-2 capable of rotating around a turning base, a support II 1-3 for fixing the telescopic shaft of the lifting cylinder, and a card slot 1-4 for locking and tensioning.

[0069] As Figure 10 shown in the figure, the turning base 5 includes a base 5-1, a pin shaft 5-2, a nut 5-3, a split pin 5-4, and a grease nipple 5-5; the base 5-1 is composed of a bottom plate and side plates symmetrically arranged on both sides of the bottom plate. The bottom surface length of the side plates is slightly less than the long side length of the base. One side surface of the side plate near the wide side of the bottom plate is set as an inclined surface inclined towards the other wide side of the bottom plate. The other side surface of the side plate opposite to the inclined surface protrudes outward. A round hole is provided at each protruding part of the two side plates for inserting the pin shaft 5-2.

[0070] As Figure 10 、 Figure 11 、 Figure 12 shown in the figure, a mounting seat is installed at the round hole on the outer side surface of any side plate, and a U-shaped groove is provided on the top surface of the mounting seat; the pin shaft 5-2 is a stepped shaft, which is respectively composed of a backing plate at the shaft head, an intermediate shaft, and an external thread at the shaft tail; when the pin shaft 5-2 is inserted into the two side plates, the backing plate at the shaft head is in the U-shaped groove of the mounting seat, and the outer contour of the backing plate is the same as the outer contour of the U-shaped groove of the mounting seat. The intermediate shaft is located between the two side plates, and a nut 5-3 is screwed on the external thread at the shaft tail. A circle of evenly spaced open slots is provided at the edge of the end of the nut 5-3 away from the side plate. A radial through hole is opened on the external thread at the shaft tail, and after the split pin 5-4 passes through the open slot and the radial through hole, axial limit of the nut 5-3 is completed.

[0071] Further solution: A plurality of radial through holes are provided at intervals on the intermediate shaft, an axial channel is opened at the shaft head, and the axial channel is shorter than the intermediate shaft. The axial channel is connected to the plurality of radial through holes; an internal thread is provided at the inlet end of the axial channel for assembling the grease filling nozzle 5-5. The pin shaft 5-2 is in clearance fit with the hinge support I 1-2. During the long-term use of this system, the durability of the turning system can be maintained by regularly injecting grease into the grease nipple 5-5. The grease passes through the grease nipple 5-5 and enters the two radial through holes in the shaft body through the axial hole at the shaft head, thereby lubricating the entire hinge point.

[0072] As Figure 3 、 Figure 4 、 Figure 6 shown in the figure, the locking and damping device includes a helical spring damper 4-1, a T-shaped support leg 4-2, two damping pads 4-3, two side supports 4-4, an intermediate support 4-5, a lock 4-6, and two rollers 4-7.

[0073] The shock-absorbing locking device 4 is fixed on the base 3 through two side supports 4-4 and an intermediate support 4-5. The helical spring shock absorber 4-1 is arranged on both sides of the T-shaped support leg 4-2. Its lower end is pin-connected to the side support 4-4, and its upper end is pin-connected to the T-shaped support leg 4-2. Two rollers 4-7 are arranged vertically inside the intermediate support 4-5. The baffle 4-24 encloses the two rollers 4-7 inside with an active gap in the middle. When the workpiece presses on the T-shaped support leg 4-2, the helical spring shock absorber 4-1 contracts and the T-shaped support leg 4-2 moves downward. When the vibration of the base 3 is transmitted to the workpiece 1, the vibration amplitude of the workpiece 1 can be effectively reduced through the buffering of the T-shaped support leg 4-2.

[0074] As Figure 5 shown, the lower part of the T-shaped support leg 4-2 is welded and composed of a C-shaped groove plate 4-21, an L-shaped cover plate 4-22, a side plate 4-23, a baffle 4-24, and a backing plate 4-25. The C-shaped groove plate 4-21 is a two-sided bent plate with round holes opened on the bent edges for inserting pins. The L-shaped cover plate 4-22 is bent on one side and covers above the C-shaped groove plate 4-21. There are round holes on the L-shaped cover plate 4-22 for installing the shock pad 4-3. The side plates 4-23 are installed at both ends of the L-shaped cover plate 4-22. The round holes opened on the side plates 4-23 are used to cooperate with the round holes on the bent edges of the C-shaped groove plate to insert pins. The baffle 4-24 is located inside the C-shaped groove plate 4-21 with a space left between them. The two rollers 4-7 are arranged vertically in the installation space formed by the baffle 4-24 and the C-shaped groove plate 4-21. The gap of this installation space is larger than the diameter of the rollers 4-7, so that the T-shaped support leg 4-2 can have a left-right swing space around the lower hinge point of the helical spring shock absorber 4-1 on both sides of the base 3 after assembly. The backing plate 4-25 is installed outside the C-shaped groove plate 4-21 for fixing the lock 4-6.

[0075] As Figure 6 shown, after the workpiece 1 rotates and falls back onto the shock-absorbing locking device 4, the lock 4-6 is opened to latch onto the card slot 1-4 on the workpiece 1, connecting the workpiece 1 and the base 3 into an integral structure. When the base 3 is vibrated, most of the vibrations can be filtered through the shock-absorbing locking device 4, thus achieving the beneficial effect of reducing the vibration of the workpiece 1.

[0076] As Figure 7As shown in the figure, the lifting system includes a lifting cylinder 2-1, a lifting seat 2-2, a cylinder pin shaft 2-3, a retaining plate 2-4, a split pin 2-5, a tubing Ⅰ 2-6, a tubing Ⅱ 2-7, a manual pump 2-8, a hand rocker 2-9, and a pump seat 2-10. One end of the lifting cylinder 2-1 is connected to the base 3 through the lifting seat 2-2, and the other end is connected to the workpiece 1 through the cylinder pin shaft 2-3, the retaining plate 2-4, and the split pin 2-5. The manual hydraulic pump is connected to the lifting cylinder 2-1 through the tubing Ⅰ 2-6 and the tubing Ⅱ 2-7 to control the extension and shortening of the lifting cylinder 2-1. The manual pump 2-8 is installed at the corresponding position of the vehicle through the pump seat 2-10.

[0077] It should be noted that the lifting operating system can also change the manual hydraulic operation to an electric cylinder electronic control system to complete this operation.

[0078] As Figure 8 、 Figure 9 shown in the figure, when the workpiece 1 needs to be flipped, use the hand rocker 2-9 to press the manual pump 22-8. The hydraulic oil flows into the lifting cylinder 2-1 through the tubing Ⅰ 2-6 and flows back to the manual pump 2-8 through the tubing Ⅱ 2-7, forming a simple circuit. The hydraulic rod extends to lift the workpiece 1, and the workpiece 1 is flipped through the flipping seat 5. Rotate the reversing valve on the manual pump 2-8 to complete the switching of the oil inlet and return oil circuits. Operate the hand rocker 2-9, and the hydraulic oil flows into the lifting cylinder 2-1 through the tubing Ⅱ 2-7 and flows back to the manual pump 2-8 through the tubing Ⅰ 2-6, forming a simple circuit. The hydraulic rod retracts, and the workpiece 1 returns to the shock absorption locking device 4 through the flipping seat 5, and the tightening lock 4-6 completes a flipping effect.

[0079] In summary, the present invention can realize functions such as flipping, falling back, and earthquake resistance of the workpiece. When in use, open the lock, and shaking the hydraulic cylinder can easily flip the workpiece to the specified position. When falling back, the oil circuit is switched through the one-way valve, and the workpiece can be flipped back to the specified position. Lock the buckle to lock the workpiece on the base. When the base is vibrated, the locking shock absorption device can reduce the vibration transmitted to the workpiece through the spiral shock absorber, thereby protecting the workpiece from the harm caused by vibration. The present invention can be applied to the flipping limit shock absorption of similar components such as the cab, hood, and cargo box on the vehicle, and can also be used for the flipping of similar large components in factories and workshops, with convenient, safe, and reliable operation.

[0080] The present invention also discloses a vehicle with a workpiece flipping system with the above-mentioned shock absorption locking device; wherein the workpiece is a cab and the base is a vehicle frame.

[0081] In the specification provided here, a large number of specific details are described. However, it can be understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0082] In addition, those skilled in the art can understand that although some of the embodiments described herein include certain features contained in other embodiments rather than other features, the combination of features of different embodiments also means that it is within the protection scope of the present invention and forms different embodiments. For example, in the above embodiments, those skilled in the art can use them in a combined manner according to the known technical solutions and the technical problems to be solved by the present application.

[0083] The above are only the preferred embodiments of the present invention, and do not impose any formal restrictions on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications using the technical content prompted above into equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A workpiece flipping system with a locking shock absorption device, which is applied to engineering vehicles, is characterized in that Comprising: A base; A workpiece, hinged to the base; A lifting operating system, one end of which is fixed to the base and the other end is hinged to the workpiece, and the workpiece is flipped on the base through the lifting operating system; A locking and damping device, installed on the base, and the workpiece is fixed to the base through the locking and damping device after the workpiece falls back to the base; When the base encounters vibration, the workpiece on the base reduces vibration through the locking and damping device; when the workpiece needs to be flipped, the locking and damping device is released, and the workpiece is flipped to the required position through the lifting operating system; Wherein, the locking and damping device comprises: Two side supports, spaced and installed on the side surface of the base; An intermediate support, in a U-shaped structure, arranged between the two side supports and connected to the base; A roller, rotatably supported in the groove of the intermediate support; A support leg, arranged between the two side supports, the roller is located in the support leg, and the roller can move in the support leg; A shock absorber, arranged on both sides of the support leg, the lower end of the shock absorber is hinged to the side support, and the upper end of the shock absorber is hinged to the support; when the workpiece presses on the support leg, the shock absorber contracts to make the support leg move downward; when the vibration of the base is transmitted to the workpiece, the vibration amplitude of the workpiece is reduced through the buffering of the support leg; A lock, fixed on the outer surface of the support leg, cooperates with the card slot on the workpiece to connect the workpiece and the base together, and when the workpiece needs to be flipped, the lock is opened to realize the flipping of the workpiece; The support leg is of a T-shaped structure and comprises: A C-shaped groove plate, which is a two-side bending plate, and round holes are opened on the bending edges for inserting a pin shaft; An L-shaped cover plate, with a single-side bend, covering above the C-shaped groove plate, and round holes are opened on the L-shaped cover plate for installing a shock pad; Side plates, installed at both ends of the L-shaped cover plate, and round holes opened on the side plates are used to cooperate with the round holes on the bending edges of the C-shaped groove plate to insert a pin shaft; A baffle, located inside the C-shaped groove plate, the roller is installed in the installation space formed by the baffle and the C-shaped groove plate, and the gap of this installation space is larger than the diameter of the roller, so that the support leg can move up, down, left and right relative to the roller; A backing plate, installed outside the C-shaped groove plate, for fixing the lock; 2. The workpiece flipping system with a safety limit device according to claim 1, characterized in that, The locking and damping device further comprises: A shock pad, fixed on the upper surface of the support leg; 3. The workpiece flipping system with a safety limit device according to claim 1, characterized in that, The lock comprises: A base, used for installing on the support leg; A tongue, one end of which is hinged to the base and the other end can rotate around the hinge point; A connecting rod, passing through the tongue, and there is a clearance fit between the two, and a through hole is provided on both sides of the connecting rod; A U-shaped hook, the free ends on both sides of which respectively pass through the through holes on both sides of the connecting rod, and the position of the U-shaped hook on the connecting rod is positioned by tightening the nuts on both sides of the connecting rod and located on the U-shaped hook; 4. A workpiece flipping system with a safety limit device according to claim 1, wherein: The side support is a groove-shaped structure that is narrow in the front and wide in the back, and a pair of symmetrically arranged round holes are provided at the narrow ends of both sides of the side support for inserting a pin shaft; bolt holes are provided on the bottom edge of the side support; 5. A workpiece flipping system with a safety limit device according to claim 1, wherein: The workpiece includes a workpiece body, on which there are a hinge support I capable of rotating around a flipping seat, a support II for fixing the telescopic shaft of the lifting cylinder, and a clamping groove for locking and tensioning.

6. The workpiece flipping system with a safety limit device according to claim 1, characterized in that: The workpiece is hinged to the base through the flipping seat; The flipping seat includes a base and a pin shaft; The base is composed of a bottom plate and side plates symmetrically arranged on both sides of the bottom plate. The bottom surface length of the side plates is slightly less than the long side length of the base. One side surface of the side plate near the wide side of the bottom plate is set as an inclined surface inclined towards the other wide side of the bottom plate. The other side surface of the side plate opposite to the inclined surface protrudes outwards. A round hole is provided at each protruding part of the two side plates for inserting the pin shaft.

7. The workpiece flipping system with a safety limit device according to claim 6, characterized in that: A mounting seat is installed at the round hole on the outer side surface of any one side plate, and a U-shaped groove is provided on the top surface of the mounting seat; The pin shaft is a stepped shaft, which is respectively composed of a retaining plate at the shaft head, an intermediate shaft, and an external thread at the shaft tail; When the pin shaft is inserted into the two side plates, the retaining plate at the shaft head is in the U-shaped groove of the mounting seat, and the outer contour of the retaining plate is the same as the outer contour of the U-shaped groove of the mounting seat. The intermediate shaft is located between the two side plates. A nut is screwed on the external thread at the shaft tail. A circle of evenly spaced open slots is provided at the edge of the end of the nut away from the side plate. A radial through hole is opened on the external thread at the shaft tail. After the split pin penetrates into the open slot and the radial through hole, axial limit of the nut is completed.

8. The workpiece flipping system with a safety limit device according to claim 7, characterized in that: A plurality of radial through holes are provided at intervals on the intermediate shaft. An axial channel is opened at the shaft head, and the axial channel is shorter than the intermediate shaft. The axial channel is connected to the plurality of radial through holes; an internal thread is provided at the inlet end of the axial channel for assembling a grease nipple.

9. The workpiece flipping system with a safety limit device according to claim 1, characterized in that: The lifting operating system includes a manual hydraulic pump, a lifting cylinder, an oil inlet pipe, an oil return pipe, a lifting seat, and an operating rod; One end of the lifting cylinder is connected to the base through the lifting seat, and the other end is connected to the workpiece through a cylinder pin shaft; The manual hydraulic pump is connected to the lifting cylinder through the oil inlet pipe and the oil return pipe to control the extension and shortening of the lifting cylinder.

10. The workpiece flipping system with a safety limit device according to claim 1, characterized in that: There are two locking and damping devices, and the two locking and damping devices are symmetrically installed on both side surfaces of the base.

11. A vehicle, characterized in that: It is equipped with the workpiece flipping system with a locking and damping device according to any one of claims 1 to 10; Wherein, the workpiece is a cab, and the base is a vehicle frame.

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