CN116002590A

CN116002590A - Workpiece overturning system with locking damping device and vehicle

Info

Publication number: CN116002590A
Application number: CN202211413983.2A
Authority: CN
Inventors: 李国庆; 冯汉队; 黄汉生; 苗天峰; 马玉敏; 冯勋壮; 路亚文; 杜艳伟; 陈成; 彭帅
Original assignee: Xuzhou XCMG Mining Machinery Co Ltd
Current assignee: Xuzhou XCMG Mining Machinery Co Ltd
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-04-25

Abstract

The invention discloses a workpiece overturning system with a locking damping device and a vehicle, comprising a base, a workpiece, a lifting operation system and the locking damping device; the workpiece is hinged on the base; one end of the lifting operation system is hinged with the base, the other end of the lifting operation system is hinged with the workpiece, and the workpiece is turned over on the base through the lifting operation system; the locking damping device is arranged on the base, and the workpiece can be fixed on the base through the locking damping device after falling back onto the base; when the whole system encounters vibration, the workpiece on the base can effectively reduce the vibration through the locking damping device; when the workpiece needs to be turned over, the locking damping device is released, and the workpiece is turned over to a required position by lifting the operating system. The invention can realize the functions of turning, falling back, locking, damping and the like of workpieces, is applied to turning locking damping of parts such as a cab, a hood, a container and the like of a vehicle, can also be applied to vibration control of equipment such as vibration screening and the like, and is convenient, safe and reliable to operate.

Description

Workpiece overturning system with locking damping device and vehicle

Technical Field

The invention relates to a workpiece overturning system with a locking damping device, and belongs to the field of overturning systems.

Background

A plurality of pipeline and a plurality of control elements are arranged below the engineering vehicle cab, the cab is required to be lifted for each maintenance, and as a plurality of pipelines are fixed above the cab, the lifting is very troublesome, and meanwhile, the pipeline joint is easy to loosen or break due to frequent lifting.

Aiming at the phenomenon that the problems are serious, the cab is generally required to have a turnover function. In the prior art, a simple cab base is hinged on a frame at one side to form a structure capable of being turned over at one side, but a cab is turned over in a single-side hoisting mode, special hoisting equipment is needed, and frequent maintenance is needed. How to quickly turn over the cab to carry out vehicle maintenance, and reduce vibration brought by the cab in the running process of the vehicle, so that a driver and passengers can feel comfortable in the vehicle, and the problem of plagued and grooved axles is always solved.

Disclosure of Invention

In order to solve the defects in the prior art, the invention aims to provide a workpiece overturning lifting system with a damping locking device, which can realize the functions of overturning, falling, locking, damping and the like of a workpiece.

In order to achieve the above object, the present invention adopts the following technical scheme:

the first aspect of the invention discloses a workpiece overturning system with a locking and damping device, which comprises the following components:

a base;

the workpiece is hinged on the base;

one end of the lifting operation system is fixed on the base, the other end of the lifting operation system is hinged with the workpiece, and the workpiece is turned over on the base through the lifting operation system;

the locking damping device is arranged on the base, and the workpiece is fixed on the base through the locking damping device after falling back onto the base; when the base encounters vibration, the workpiece on the base reduces the vibration through the locking damping device; when the workpiece needs to be turned over, the locking damping device is released, and the workpiece is turned over to a required position by lifting the operating system.

In some embodiments, the locking damper device includes:

two side supports which are arranged on the side surface of the base at intervals;

the middle support is of a U-shaped structure, is arranged between the two side supports and is connected with the base;

the roller is rotatably supported in the groove of the middle support;

a support leg arranged between the two side brackets, the roller being located in the support leg, the roller being movable in the support leg;

the shock absorbers are arranged on two sides of the supporting legs, the lower ends of the shock absorbers are hinged to the side supports, and the upper ends of the shock absorbers are hinged to the supporting; when the workpiece is pressed on the supporting leg, the shock absorber contracts to enable the supporting leg to move downwards; when the vibration of the base is transmitted to the workpiece, the vibration amplitude of the workpiece is reduced through the buffering of the supporting legs;

the lock catch is fixed on the outer side surface of the supporting leg and matched with the clamping groove on the workpiece to connect the workpiece with the base, and when the workpiece needs to be turned over, the lock catch is opened to turn over the workpiece.

In some embodiments, the locking shock absorber further comprises:

and the shock absorption pad is fixed on the upper surface of the supporting leg.

In some embodiments, the support leg is a T-shaped structure comprising:

the C-shaped groove plate is a two-side bending plate, and round holes are formed in the bending edges and used for inserting pin shafts;

the L-shaped cover plate is bent unilaterally and covered above the C-shaped groove plate, and a round hole is formed in the L-shaped cover plate and used for installing a shock pad;

the side plates are arranged at two ends of the L-shaped cover plate, and round holes formed in the side plates are used for being matched with round holes in the bending edges of the C-shaped groove plates to penetrate through pin shafts;

the baffle is positioned at the inner side of the C-shaped groove plate, the roller is arranged in an installation space formed by the baffle and the C-shaped groove plate, and the gap of the installation space is larger than the diameter of the roller, so that the supporting leg can move up and down and left and right relative to the roller;

and the base plate is arranged on the outer side of the C-shaped groove plate and used for fixing the lock catch.

In some embodiments, the latch comprises:

the base is used for being mounted on the supporting legs;

one end of the clamping tongue is hinged to the base, and the other end of the clamping tongue can rotate around a hinge point;

the connecting rod penetrates through the clamping tongue and is in clearance fit with the clamping tongue, and two through holes are formed in two sides of the connecting rod;

the free ends of the two sides of the U-shaped hook respectively penetrate through the through holes on the two sides of the connecting rod, and the U-shaped hook is positioned on the connecting rod through the fastening of nuts on the U-shaped hook and positioned on the two sides of the connecting rod.

In some embodiments, the side support is of a groove structure with a narrow front and a wide rear, and the narrow ends of the two sides of the side support are respectively provided with a circular hole which is symmetrically arranged and used for inserting the pin shaft; the bottom edge of the side support is provided with a bolt hole.

In some embodiments, the workpiece comprises a workpiece body, and the workpiece body is provided with a hinged support I capable of rotating around a turnover seat, a support II for fixing a telescopic shaft of a lifting cylinder and a clamping groove for locking and tensioning.

In some embodiments, the workpiece is hinged to the base by a flip seat; the overturning seat comprises a base and a pin shaft; the base comprises a bottom plate and side plates which are arranged symmetrically and are positioned on two sides of the bottom plate, the bottom surface length of each side plate is slightly smaller than the length of a long side of the base, one side surface of each side plate, which is close to the wide side of the bottom plate, is provided with an inclined surface which inclines towards the other wide side of the bottom plate, the other side surface of each side plate, which is opposite to the inclined surface, protrudes outwards, and each side plate protruding part on two sides is provided with a round hole for inserting a pin shaft.

In some embodiments, a mounting seat is arranged at the round hole of the outer side surface of any side plate, and a U-shaped groove is arranged on the top surface of the mounting seat; the pin shaft is a stepped shaft and consists of a retaining plate positioned on the shaft head, a middle shaft and external threads positioned at the tail of the shaft respectively; after the pin shaft is inserted into the two side plates, the retaining plate positioned on the shaft head is positioned in the U-shaped groove of the mounting seat, the outer contour of the retaining plate is identical to the outer contour of the U-shaped groove of the mounting seat, the intermediate shaft is positioned between the two side plates, a nut is screwed on the outer thread positioned at the tail of the shaft, a circle of open grooves which are spaced and uniformly distributed are formed at the edge of one end of the nut far away from the side plates, radial through holes are formed in the outer thread of the tail of the shaft, and axial limiting of the nut is completed after the cotter penetrates into the open grooves and the radial through holes.

In some embodiments, a plurality of radial through holes are formed in the intermediate shaft at intervals, the shaft head is provided with an axial channel, the axial channel is shorter than the intermediate shaft, and the axial channel is communicated with the plurality of radial through holes; and an internal thread is arranged at the inlet end of the axial passage and is used for assembling a butter filling nozzle.

In some embodiments, the lifting operation system comprises a manual hydraulic pump, a lifting cylinder, an oil inlet pipe, an oil return pipe, a lifting seat and an operation rod; one end of the lifting cylinder is connected to the base through the lifting seat, and the other end of the lifting cylinder is connected to the workpiece through a cylinder pin shaft; the manual hydraulic pump is connected with the lifting cylinder through an oil inlet pipe and an oil return pipe, and controls the extension and shortening of the lifting cylinder.

In some embodiments, the locking shock absorbing devices are two, and the two locking shock absorbing devices are symmetrically arranged on two side surfaces of the base.

The second aspect of the invention discloses a vehicle equipped with the workpiece overturning system with the locking damping device; wherein the workpiece is a cab, and the base is a frame.

In some embodiments, the vehicle comprises a mining dump truck.

The invention has the beneficial effects that:

the invention can realize the functions of overturning, falling back, anti-vibration and the like of the workpiece, when in use, the lock catch is opened, the hydraulic cylinder is rocked to easily overturn the workpiece to a specified position, when falling back, the workpiece can be overturned back to the specified position through the one-way valve switching oil way, and the lock catch is locked to lock the workpiece on the base. When the base is vibrated, the locking damping device can reduce vibration transmitted to the workpiece through the spiral spring damper, so that the damage of the workpiece caused by vibration is protected. The invention can be applied to the turnover limiting shock absorption of similar components such as a cab, a hood, a container and the like on a vehicle, and can also be used for turnover of similar large components in a factory building and a workshop, and the invention has convenient operation, safety and reliability.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort.

In the drawings:

FIG. 1 is a schematic diagram of a workpiece turnover system assembly according to the present invention;

FIG. 2 is a schematic view of a workpiece structure according to the present invention;

FIG. 3 is a schematic view of a shock absorbing locking device according to the present invention;

FIG. 4 is a schematic diagram of a shock absorbing locking device according to the second embodiment of the present invention;

FIG. 5 is a schematic view of a support leg structure according to the present invention;

FIG. 6 is a schematic view of a structure of the workpiece locking according to the present invention;

FIG. 7 is a schematic diagram of a workpiece overturning and lifting operation system according to the present invention;

FIG. 8 is a schematic diagram of a lifting operation system according to the present invention;

FIG. 9 is a schematic diagram of a lifting operation system according to the present invention when the system is lowered;

FIG. 10 is a schematic view of a flip seat according to the present invention;

FIG. 11 is a schematic view of a pin structure of the flip seat according to the present invention;

fig. 12 is a sectional view of a pin structure of the flip seat according to the present invention.

Reference numerals illustrate: 1. a workpiece; 2. lifting an operating system; 3. a base; 4. damping locking device; 5. turning over the seat;

1-1, a workpiece body; 1-2, a hinged support I; 1-3, a support II; 1-4, a clamping groove;

2-1, lifting cylinders; 2-2 lifting seats; 2-3 cylinder pins; 2-4 baffle plates; 2-5, cotter pin; 2-6, oil pipe I; 2-7, oil pipe II; 2-8, manual pump; 2-9, hand shaking the rod; 2-10, pump seat;

4-1, a coil spring damper; 4-2, T-shaped supporting legs; 4-3, a shock pad; 4-4, side supports; 4-5, an intermediate support; 4-6, locking; 4-7, idler wheels;

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

5-1, a base; 5-2, a pin shaft; 5-3, a screw cap; 5-4, cotter pin; 5-5, a butter filling nozzle.

It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1, a workpiece overturning system with a damping locking device comprises a workpiece 1, a lifting operation system 2, a base 3, the damping locking device 4 and an overturning seat 5; the workpiece 1 is hinged on the base 3 through a turnover seat 5; the workpiece 1 is connected with the base 3 at two ends of a lifting cylinder 2-1 of the lifting operation system 2, and the workpiece 1 is turned over on the base 3 through the lifting operation system 2; the damping locking devices 4 are arranged at two sides of the base 3, and after the workpiece 1 falls back onto the base 3, the workpiece 1 can be locked on the damping device 4 through the lock catches 4-6 on the damping locking devices 4, so that the workpiece 1 and the base 3 are integrated; when the workpiece 1 needs to be turned over next time, the lock catches 4-6 are opened, and the operation system is lifted repeatedly, so that the workpiece 1 can be turned over again.

It should be noted that the workpiece 1 may be a cab, a hood, or a similar large workpiece on a vehicle, and the base 3 may be a frame on the vehicle or a maintenance platform of a workshop, or the like.

As shown in FIG. 2, a workpiece 1 comprises a workpiece body 1-1, wherein a hinged support I1-2 capable of rotating around a turnover seat, a support II 1-3 for fixing a telescopic shaft of a lifting cylinder and a clamping groove 1-4 for locking and tensioning are arranged on the workpiece body 1-1.

As shown in fig. 10, the overturning seat 5 comprises a base 5-1, a pin shaft 5-2, a nut 5-3, a cotter pin 5-4 and a butter filling nozzle 5-5; the base 5-1 is composed of a bottom plate and side plates which are positioned at two sides of the bottom plate and are symmetrically arranged, the bottom surface length of each side plate is slightly smaller than the length of a long side of the base, one side surface of each side plate, which is close to the wide side of the bottom plate, is provided with an inclined surface which inclines towards the other wide side of the bottom plate, the other side surface of each side plate, which is opposite to the inclined surface, protrudes outwards, and the protruding parts of the side plates at two sides are respectively provided with a round hole for inserting the pin shaft 5-2.

As shown in fig. 10, 11 and 12, a mounting seat is mounted at a round hole on the outer side surface of any side plate, and a U-shaped groove is formed in the top surface of the mounting seat; the pin shaft 5-2 is a stepped shaft and consists of a retaining plate positioned on the shaft head, a middle shaft and external threads positioned on the shaft tail; after the pin shaft 5-2 is inserted into the two side plates, the retaining plate positioned on the shaft head is positioned in the U-shaped groove of the mounting seat, the outer contour of the retaining plate is identical to the outer contour of the U-shaped groove of the mounting seat, the middle shaft is positioned between the two side plates, the screw cap 5-3 is screwed on the outer thread positioned at the tail of the shaft, a circle of open grooves which are spaced and uniformly distributed are arranged at the edge of the end far away from the side plates of the screw cap 5-3, the outer thread of the tail of the shaft is provided with radial through holes, and the axial limiting of the screw cap 5-3 is completed after the cotter pin 5-4 penetrates into the open grooves and the radial through holes.

The further scheme is as follows: the intermediate shaft is provided with a plurality of radial through holes at intervals, the shaft head is provided with an axial channel, the axial channel is shorter than the intermediate shaft, and the axial channel is communicated with the plurality of radial through holes; the inlet end of the axial passage is provided with an internal thread for fitting the grease zerk 5-5. The pin shaft 5-2 is in clearance fit with the hinged support I1-2, the durability of the overturning system can be kept by periodically pumping butter into the butter filling nozzle 5-5 during long-term use, and the butter passes through the butter nozzle 5-5 and enters two radial through holes of the shaft body from axial holes on the shaft head, so that the whole hinge point is lubricated.

As shown in fig. 3, 4 and 6, the locking damping device comprises a spiral spring damper 4-1, a T-shaped supporting leg 4-2, two damping cushions 4-3, two side supports 4-4, a middle support 4-5, a lock catch 4-6 and two rollers 4-7.

The damper locking device 4 is fixed to the base 3 by two side brackets 4-4, and a middle bracket 4-5. The spiral spring shock absorbers 4-1 are arranged on two sides of the T-shaped supporting leg 4-2, the lower ends of the spiral spring shock absorbers are in pin shaft connection with the side supporting seats 4-4, and the upper ends of the spiral spring shock absorbers are in pin shaft connection with the T-shaped supporting leg 4-2; the two rollers 4-7 are vertically arranged on the inner side of the middle support 4-5, the baffle 4-24 wraps the two rollers 4-7 inside, a movable gap is arranged in the middle, and when a workpiece is pressed on the T-shaped supporting leg 4-2, the spiral spring damper 4-1 contracts, and the T-shaped supporting leg 4-2 moves downwards. When the vibration of the base 3 is transferred to the workpiece 1, the vibration amplitude of the workpiece 1 can be effectively reduced by the buffering of the T-shaped supporting legs 4-2.

As shown in FIG. 5, the lower part of the T-shaped supporting leg 4-2 is formed by welding a C-shaped groove plate 4-21, an L-shaped cover plate 4-22, a side plate 4-23, a baffle plate 4-24 and a base plate 4-25. The C-shaped groove plates 4-21 are two-side bending plates, and round holes are formed in the bending edges and used for inserting pin shafts; the L-shaped cover plate 4-22 is unilaterally bent and covered above the C-shaped groove plate 4-21, and a round hole is formed in the L-shaped cover plate 4-22 and used for installing the shock pad 4-3; the side plates 4-23 are arranged at two ends of the L-shaped cover plates 4-22, and round holes formed in the side plates 4-23 are used for being matched with round holes in the bending edges of the C-shaped groove plates to penetrate through pin shafts; the baffle plate 4-24 is positioned at the inner side of the C-shaped groove plate 4-21, a space is reserved between the baffle plate 4-24 and the C-shaped groove plate, two rollers 4-7 are arranged in an installation space formed by the baffle plate 4-24 and the C-shaped groove plate 4-21 up and down, and the gap of the installation space is larger than the diameter of the rollers 4-7, so that after the T-shaped supporting leg 4-2 is assembled, a left-right swinging space exists around the lower hinge point of the spiral spring damper 4-1 at two sides of the base 3; the backing plate 4-25 is arranged on the outer side of the C-shaped groove plate 4-21 and is used for fixing the lock catch 4-6.

As shown in fig. 6, after the workpiece 1 rotates and falls back onto the damping locking device 4, the lock catch 4-6 is opened to lock the clamping groove 1-4 on the workpiece 1, so that the workpiece 1 and the base 3 are connected into a whole structure, and most of vibration can be filtered through the damping locking device 4 after the base 3 is vibrated, so that the beneficial effect of reducing the vibration of the workpiece 1 is achieved.

As shown in FIG. 7, the lifting system comprises a lifting cylinder 2-1, a lifting seat 2-2, a cylinder pin shaft 2-3, a baffle plate 2-4, a cotter pin 2-5, an oil pipe I2-6, an oil pipe II 2-7, a manual pump 2-8, a manual rocker 2-9 and a pump seat 2-10. One end of a lifting cylinder 2-1 is connected to a base 3 through a lifting seat 2-2, and the other end is connected to a workpiece 1 through a cylinder pin shaft 2-3, a baffle plate 2-4 and a cotter pin 2-5; the manual hydraulic pump is connected with the lifting cylinder 2-1 through the oil pipe I2-6 and the oil pipe II 2-7 to control the extension and shortening of the lifting cylinder 2-1; the manual pump 2-8 is mounted at a corresponding position of the vehicle through the pump mount 2-10.

It should be noted that, the lifting operation system may also change manual hydraulic operation into electric cylinder electric control system to complete the operation.

As shown in fig. 8 and 9, when the workpiece 1 needs to be turned over, the manual pump 22-8 is pressed by the manual rocker 2-9, hydraulic oil flows into the lifting cylinder 2-1 through the oil pipe i 2-6 and flows back to the manual pump 2-8 through the oil pipe ii 2-7, a simple loop is formed, the hydraulic rod stretches out, the workpiece 1 is lifted up, and the turning over of the workpiece 1 is realized through the turning over seat 5. The reversing valve on the manual pump 2-8 is rotated to finish the switching of an oil inlet and return path, the manual rocker 2-9 is operated, hydraulic oil flows into the lifting cylinder 2-1 through the oil pipe II 2-7, flows back to the manual pump 2-8 through the oil pipe I2-6 to form a simple loop, the hydraulic rod is retracted, the workpiece 1 returns to the damping locking device 4 through the turnover seat 5, and the locking buckle 4-6 is tensioned to finish one-time turnover effect.

In summary, the invention can realize the functions of overturning, falling back, anti-vibration and the like of the workpiece, when in use, the lock catch is opened, the hydraulic cylinder is rocked to easily overturn the workpiece to a prepared position, when falling back, the workpiece can be overturned back to a designated position through the one-way valve switching oil way, and the lock catch is locked on the base to lock the workpiece. When the base is vibrated, the locking damping device can reduce vibration transmitted to the workpiece through the spiral damper, so that the damage of the workpiece caused by vibration is protected. The invention can be applied to the turnover limiting shock absorption of similar components such as a cab, a hood, a container and the like on a vehicle, and can also be used for turnover of similar large components in a factory building and a workshop, and the invention has convenient operation, safety and reliability.

The invention also discloses a vehicle, and a workpiece overturning system with the damping locking device; wherein the workpiece is a cab, and the base is a frame.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features contained in other embodiments, but not others, combinations of features of different embodiments are equally meant to be within the scope of the invention and form different embodiments. For example, in the above embodiments, those skilled in the art can use the above embodiments in combination according to known technical solutions and technical problems to be solved by the present application.

The foregoing description is only illustrative of the preferred embodiment of the present invention, and is not to be construed as limiting the invention, but is to be construed as limiting the invention to any simple modification, equivalent variation and variation of the above embodiments according to the technical matter of the present invention without departing from the scope of the invention.

Claims

1. A workpiece flipping system with a locking shock absorbing device, comprising:

a base;

the workpiece is hinged on the base;

2. The workpiece tilting system with safety limiting device according to claim 1, wherein the locking damper device comprises:

the roller is rotatably supported in the groove of the middle support;

3. The workpiece flipping system with a safety limiting device of claim 2, wherein the locking shock absorbing device further comprises:

4. The workpiece turnover system with safety limiting device of claim 2, wherein the support leg is of T-shaped structure comprising:

5. The workpiece flipping system with a safety stop of claim 2, wherein the latch comprises:

the base is used for being mounted on the supporting legs;

6. A workpiece tilting system with a safety stop device according to claim 2, characterized in that:

the side support is of a groove-shaped structure with a narrow front part and a wide rear part, and the narrow ends of the two sides of the side support are respectively provided with a circular hole which is symmetrically arranged and used for inserting a pin shaft; the bottom edge of the side support is provided with a bolt hole.

7. The workpiece turning system with a safety limiting device according to claim 1, wherein:

the workpiece comprises a workpiece body, and the workpiece body is provided with a hinged support I capable of rotating around a turnover seat, a support II for fixing a lifting cylinder telescopic shaft and a clamping groove for locking and tensioning.

8. The workpiece turning system with a safety limiting device according to claim 1, wherein:

the workpiece is hinged on the base through a turnover seat;

the overturning seat comprises a base and a pin shaft;

the base comprises a bottom plate and side plates which are arranged symmetrically and are positioned on two sides of the bottom plate, the bottom surface length of each side plate is slightly smaller than the length of a long side of the base, one side surface of each side plate, which is close to the wide side of the bottom plate, is provided with an inclined surface which inclines towards the other wide side of the bottom plate, the other side surface of each side plate, which is opposite to the inclined surface, protrudes outwards, and each side plate protruding part on two sides is provided with a round hole for inserting a pin shaft.

9. The workpiece turning system with a safety limiting device of claim 8, wherein:

a mounting seat is arranged at the round hole of the outer side surface of any side plate, and a U-shaped groove is formed in the top surface of the mounting seat;

the pin shaft is a stepped shaft and consists of a retaining plate positioned on the shaft head, a middle shaft and external threads positioned at the tail of the shaft respectively;

after the pin shaft is inserted into the two side plates, the retaining plate positioned on the shaft head is positioned in the U-shaped groove of the mounting seat, the outer contour of the retaining plate is identical to the outer contour of the U-shaped groove of the mounting seat, the intermediate shaft is positioned between the two side plates, a nut is screwed on the outer thread positioned at the tail of the shaft, a circle of open grooves which are spaced and uniformly distributed are formed at the edge of one end of the nut far away from the side plates, radial through holes are formed in the outer thread of the tail of the shaft, and axial limiting of the nut is completed after the cotter penetrates into the open grooves and the radial through holes.

10. The workpiece turning system with a safety limiting device of claim 9, wherein:

the intermediate shaft is provided with a plurality of radial through holes at intervals, the shaft head is provided with an axial channel, the axial channel is shorter than the intermediate shaft, and the axial channel is communicated with the plurality of radial through holes; and an internal thread is arranged at the inlet end of the axial passage and is used for assembling a butter filling nozzle.

11. The workpiece turning system with a safety limiting device according to claim 1, wherein:

the lifting operation system comprises a manual hydraulic pump, a lifting cylinder, an oil inlet pipe, an oil return pipe, a lifting seat and an operation rod;

one end of the lifting cylinder is connected to the base through the lifting seat, and the other end of the lifting cylinder is connected to the workpiece through a cylinder pin shaft;

the manual hydraulic pump is connected with the lifting cylinder through an oil inlet pipe and an oil return pipe, and controls the extension and shortening of the lifting cylinder.

12. The workpiece turning system with a safety limiting device according to claim 1, wherein:

the two locking damping devices are symmetrically arranged on two side surfaces of the base.

13. A vehicle, characterized in that:

a workpiece tilting system equipped with the locking damper device according to any one of claims 1 to 12;

wherein the workpiece is a cab, and the base is a frame.