Turnover mechanism

Abstract

The utility model discloses a turnover mechanism which comprises a fixing seat, a turnover arm rotationally connected with the fixing seat and a driving assembly used for driving the turnover arm to rotate, the turnover mechanism comprises a first state and a second state, the turnover arm comprises a limiting part, the fixing seat comprises a limiting block, and the limiting block is arranged on the limiting part in the first state. In the first state, the limiting part is combined with the limiting block, and in the second state, the limiting block is far away from the limiting block; the turnover mechanism comprises a first buffer and a second buffer which are fixed to the fixing base, the first buffer is used for supporting the first supporting part of the turnover arm in the first state, and the second buffer is used for supporting the second supporting part of the turnover arm in the second state. The first buffer and the second buffer are used for supporting the overturning arm at different motion nodes, kinetic energy in the motion process is effectively absorbed, and impact and vibration caused by inertia or high load are relieved.

Description

Technical Field

[0001] This utility model relates to the field of flipping equipment, and in particular to a flipping mechanism. Background Technology

[0002] Currently, welding is an important processing technology in industrial production, widely used in machinery, automobiles, shipbuilding, and other fields. Existing tooling uses a cylinder-driven tilting structure to flip over the product, achieving precise positioning for welding. However, in current technology, the tooling has a certain weight, placing requirements on the overall load-bearing capacity and stability of the tilting mechanism. When the load is too heavy, problems such as unstable tilting motion and inaccurate positioning often occur. Utility Model Content

[0003] One of the objectives of this invention is to provide a flipping mechanism to at least solve the technical problem that the flipping mechanism is not stable enough when driving high-load motion in the prior art.

[0004] To achieve one of the above-mentioned objectives, one embodiment of this utility model provides a flipping mechanism, comprising: a fixed base, a flipping arm rotatably connected to the fixed base, and a driving assembly for driving the flipping arm to rotate. The flipping mechanism includes a first state and a second state. The flipping arm includes a limiting portion, and the fixed base includes a limiting block. In the first state, the limiting portion is engaged with the limiting block, and in the second state, the limiting block is moved away from the limiting block. The flipping mechanism includes a first buffer and a second buffer fixed to the fixed base. The first buffer supports a first support portion of the flipping arm in the first state, and the second buffer supports a second support portion of the flipping arm in the second state.

[0005] As a further improvement of one embodiment of the present invention, the first support includes an abutting plane formed on the flip arm. In the first state, the abutting plane of the flip arm faces downward and is located directly above the first buffer.

[0006] As a further improvement of one embodiment of the present invention, the first support part includes two first buffer seats symmetrically arranged on two sides of the flipping arm, and the flipping mechanism includes two first buffers arranged in a one-to-one correspondence with the two first buffer seats.

[0007] As a further improvement of one embodiment of the present invention, the second support part includes two second buffer seats symmetrically arranged on two sides of the flipping arm, and the flipping mechanism includes two second buffers arranged in a one-to-one correspondence with the two second buffer seats.

[0008] As a further improvement of one embodiment of the present invention, the flipping arm has a first connecting part and a second connecting part. The first connecting part is rotatably mounted on the fixed base via a first rotating shaft, and the second connecting part is rotatably connected to the drive rod of the drive assembly. In the first state, the drive rod has a first position, and in the second state, the drive rod has a second position. The first rotating shaft is located on the perpendicular bisector of the line connecting the first position and the second position.

[0009] As a further improvement of one embodiment of the present invention, the driving rod is a Y-shaped connecting rod, and the second connecting part is connected to the Y-shaped connecting rod through a second rotating shaft. The driving rod has a first position, which means the position of the second rotating shaft in the first state; the driving rod has a second position, which means the position of the second rotating shaft in the second state.

[0010] As a further improvement of one embodiment of the present invention, the flipping mechanism includes a linkage mechanism for limiting the movement of the flipping arm in a second state. The linkage mechanism is connected to the fixed base via a second rotating shaft. The first end of the linkage mechanism is rotatably connected to the second connecting part, and the second end of the linkage mechanism is rotatably connected to the drive rod.

[0011] As a further improvement of one embodiment of the present invention, in the first state, the drive rod has a first position, and in the second state, the drive rod has a second position, and the second rotation axis is located on the perpendicular bisector of the line connecting the first position and the second position.

[0012] As a further improvement of one embodiment of the present invention, the drive assembly includes a standard cylinder with a stroke greater than 100 mm.

[0013] As a further improvement of one embodiment of the present invention, the flipping angle of the flipping arm from the first state to the second state is not less than 80° and not greater than 90°.

[0014] Compared with the prior art, the present invention provides a flipping mechanism that can be used to drive high loads to flip. A first buffer and a second buffer are set to support the flipping arm in the first state and the second state, respectively, to reduce the impact and vibration caused by inertia or high load, and improve the stability and reliability of the system. Attached Figure Description

[0015] Figure 1 This is a perspective view of the flipping mechanism in the first embodiment of this utility model.

[0016] Figure 2 This is a front view of the flipping mechanism in the first state of the first embodiment of this utility model.

[0017] Figure 3This is a front view of the flipping mechanism in the second state in the first embodiment of this utility model.

[0018] Figure 4 This is an exploded view of the flipping mechanism in the first embodiment of this utility model.

[0019] Figure 5 This is a perspective view of the flipping mechanism in the second embodiment of this utility model.

[0020] Figure 6 This is a front view of the flipping mechanism in the first state in the second embodiment of this utility model.

[0021] Figure 7 This is a front view of the flipping mechanism in the second state of the second embodiment of this utility model.

[0022] Figure 8 This is an exploded view of the flipping mechanism in the second embodiment of this utility model.

[0023] Figure 9 This is a perspective view of the flipping mechanism in the third embodiment of this utility model.

[0024] Figure 10 This is a front view of the flipping mechanism in the first state in the third embodiment of this utility model.

[0025] Figure 11 This is a front view of the flipping mechanism in the second state in the third embodiment of this utility model. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0027] The terms used herein, such as “above,” “over,” “below,” and “under,” indicating spatial relative position, are for illustrative purposes to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. These terms may be intended to include different orientations of the device in use or operation other than those shown in the figures. For example, if the device in the figures is flipped, a unit described as being “below” or “under” another unit or feature would be “above” that unit or feature. Therefore, the exemplary term “below” can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or otherwise) and the spatially related descriptive terms used herein will be interpreted accordingly.

[0028] Please see Figure 1This is a structural schematic diagram of a flipping mechanism 100 provided in an embodiment of the present utility model.

[0029] The flipping mechanism 100 includes: a fixed base 10, a flipping arm 20 rotatably connected to the fixed base 10, and a drive assembly 30 for driving the flipping arm 20 to rotate. The flipping arm 20 is used to connect to an external load and drive the load to rotate, and the drive assembly 30 is used to drive the flipping arm 20 to rotate. Both the flipping arm 20 and the drive assembly 30 can be rotatably mounted on the fixed base 10.

[0030] In practical applications, the flipping mechanism 100 is mainly used to drive the rotation of large loads. Large loads are relatively heavy and have relatively high requirements for driving force and buffering resistance.

[0031] The flipping mechanism 100 includes a first state and a second state, the flipping arm 20 includes a limiting part 23, and the fixed base 10 includes a limiting block 11, combined with... Figure 2-3 As shown, in the first state, the limiting part 23 is engaged with the limiting block 11. Specifically, the first state is equivalent to the initial state and the flipped position state, and the flipping arm 20 is engaged with the fixed base 10. In the second state, the limiting part 23 is away from the limiting block 11. Specifically, the second state is equivalent to the open state, and the flipping arm is rotated open relative to the fixed base 10. The limiting part 23 mounted on the flipping arm 20 cooperates with the limiting block 11 on the fixed base 10 to ensure precise limiting of the flipping movement.

[0032] The flipping mechanism 100 includes a first buffer 40 and a second buffer 50 fixed to the fixed base 10. The first buffer 40 is used to support the first support portion 21 of the flipping arm 20 in a first state, and the second buffer 50 is used to support the second support portion 22 of the flipping arm 20 in a second state.

[0033] Understandably, if left unattended when driving a heavy load to rotate, the impact on the fixed base 10 will be significant, increasing the likelihood of damage to the fixed base 10. The first buffer 40 and the second buffer 50 are provided to support the rotating arm 20 in different motion states to absorb the kinetic energy generated during the rotation of the rotating arm 20, preventing damage to the rotating arm 20 and the fixed base 10 due to inertial impact.

[0034] In one embodiment, the first support 21 includes an abutment plane 201 formed on the flip arm 20. In the first state, the abutment plane 201 of the flip arm 20 faces downward and is located directly above the first buffer 40.

[0035] Combination Figure 2-3As shown, the flipping arm 21 is in the shape of a vertical plate. In the first state, a portion of the lower surface of the flipping arm 20 is formed as the abutment plane 201. The first buffer 40 is disposed on the top of the fixed base 10 and supports the abutment plane 201 of the flipping arm 21.

[0036] In the first state, the lower surface of the other part of the flipping arm 20 forms the limiting part 23, which is adjacent to the abutment plane 201. In the first state, both the limiting part 23 and the abutment plane 201 face downwards and are stepped. It can be understood that the limiting part 23 and the abutment plane 201 are not necessarily located on the same plane. The limiting part 23 is located on the outside relative to the abutment plane 201, which allows the abutment plane 201 to be closer to the first rotation axis 61, which is equivalent to optimizing the position of the first buffer 40 and achieving a better buffering effect.

[0037] The limiting block 11 is set near the first buffer 40 in conjunction with the limiting part 23, and the height of the limiting block 11 can be adjusted according to actual needs.

[0038] In one embodiment, the first support 21 includes two first buffer seats 211 symmetrically arranged on two sides of the flipping arm 20, and the flipping mechanism 100 includes two first buffers 40 arranged in a one-to-one correspondence with the two first buffer seats 211.

[0039] Combination Figure 4-7 As shown, in the second embodiment of this invention, the two first buffers 40 are positioned precisely against the sides of the flipping arm 20 to provide better cushioning. At this time, the first buffer seat 211 is positioned on the outer side to prevent interference with other structures during flipping.

[0040] The difference between the first support part 21 in the two embodiments described above is mainly due to the different cylinder selections of the drive assembly 30 in practice. In the first embodiment, the drive assembly 30 uses a standard cylinder with a diameter of 80mm, which has a large overall load-bearing capacity, so only one first buffer 40 needs to be designed. In the second embodiment, the drive assembly 30 uses a standard cylinder with a diameter of 63mm, which has a relatively small overall load-bearing capacity, so two symmetrical first buffers 40 are designed.

[0041] In one embodiment, the second support 22 includes two second buffer seats 221 symmetrically arranged on two sides of the flipping arm 20, and the flipping mechanism 100 includes two second buffers 50 arranged in a one-to-one correspondence with the two second buffer seats 221.

[0042] Combination Figure 1-3As shown, in the first embodiment of this case, two second buffers 50 are respectively disposed on both sides of the fixed base 10, so that after the flip arm 20 is flipped, the two second buffer seats 221 are just supported on the second buffers 50. In this embodiment, the second buffers 50 abut against the second buffers 50 in the vertical direction.

[0043] Combination Figure 4-7 As shown, in the second embodiment of this case, two second buffers 50 are respectively disposed on both sides of the fixed base 10, so that after the flip arm 20 is flipped, the two second buffer seats 221 are just supported on the second buffers 50. In this embodiment, the second buffers 50 are tilted and abut against the second buffers 50.

[0044] It is understood that in the two embodiments described above, the direction of the second buffer 50 can be set according to the angle that the final flip arm 20 needs to rotate, so that the flip arm 20 can be buffered no matter how many angles it needs to flip.

[0045] The first buffer 40 and the second buffer 50 mentioned above can be connected to the fixed base 10 via connecting blocks. Since they need to withstand significant buffering and impact forces, the connecting blocks also have certain requirements. The connecting blocks are preferably made of 45# steel, which, after quenching and tempering, has high and uniform surface hardness, good wear resistance, and high fatigue resistance.

[0046] In the first and second embodiments of this utility model, there is another difference: in the first embodiment, the telescopic rod of the drive assembly 30 is further equipped with a telescopic protective cover to improve the service life of the drive assembly 30.

[0047] The common point of the two embodiments above lies in the basic principle: the tilting arm 20 rotates and switches between a first state and a second state. Specifically, through the transmission connection between the tilting arm 20, the fixed base 10, and the drive assembly 30, the linear extension and retraction motion of the cylinder 31 is converted into a tilting motion. More specifically, one end of the tilting arm 20 is connected to the drive rod 33 via the second rotating shaft 62, and the drive rod 33 is connected to the extension rod 32 of the cylinder. The other end of the tilting arm 20 is rotatably connected to the fixed base 10 via the first rotating shaft 61.

[0048] A first support portion 21 and a second support portion 22 are provided on the tilting arm 20, which are used to contact the first buffer 40 to provide cushioning when the tilting arm 20 is in the first state; when the tilting arm 20 is in the second state, cushioning is achieved by contacting the second buffer 50 on the fixed base 10. At the same time, the limiting portion 23 mounted on the tilting arm 20 cooperates with the limiting block 11 to ensure precise limiting of the tilting movement.

[0049] The tilting arm 20 integrates a first support part 21, a second support part 22, and a limiting part 23, improving structural compactness and making it suitable for various application scenarios. In practice, the outline and shape of the tilting arm 20 can be changed according to requirements, as long as the first support part 21, the second support part 22, and the limiting part 23 are integrated. The tilting arm 20 can be indirectly connected to the load.

[0050] In one embodiment, the tilting arm 20 has a first connecting portion 24 and a second connecting portion 25. The first connecting portion 24 is rotatably mounted on the fixed base 10 via a first rotating shaft 61, and the second connecting portion 25 is rotatably connected to the drive rod 33 of the drive assembly. The first connecting portion 24 is disposed near the fixed base 10, and the second connecting portion 25 is disposed near the drive assembly 30.

[0051] Combination Figure 2-3 The drive assembly 30 described in 5-6 includes a cylinder 31 and a telescopic rod 32. The drive rod 33 is connected to the telescopic rod 32. The telescopic rod 32 moves linearly and simultaneously drives the drive rod 33 to move linearly. The drive rod 33 is rotatably connected to the tilting arm 20 to convert the linear motion of the drive assembly 30 into rotational motion.

[0052] In the first state, the drive rod 33 has a first position; in the second state, the drive rod 33 has a second position; and the first rotation shaft 61 is located on the perpendicular bisector of the line connecting the first position and the second position.

[0053] It is understood that the fixed base 10 is relatively fixed, and the first connecting part 24 of the flipping arm 20 is rotatably connected to the fixed base 10 through the first rotating shaft 61. This is equivalent to the second connecting part 25 of the flipping arm 20 rotating around the first rotating shaft 61. It can be understood that the first rotating shaft 61 is the center of a circle, and the second connecting part 25 will form an arc trajectory during rotation. The center of the circle must be located on the perpendicular bisector of the line connecting the two endpoints of the arc trajectory of the second connecting part 25. Therefore, when the second connecting part 25 is directly connected to the drive rod 33, in other words, the first rotating shaft 61 is located on the perpendicular bisector of the line connecting the two endpoints of the movement trajectory of the drive rod 33.

[0054] The drive rod 33 is a Y-shaped connector, and the second connecting part 25 is connected to the Y-shaped connector via a second rotating shaft 62, which passes through the second connecting part 25 and the drive rod 33. The drive rod 33 has a first position, meaning the position of the second rotating shaft 62 in the first state; and a second position, meaning the position of the second rotating shaft 62 in the second state. In other words, the first rotating shaft 61 is located on the perpendicular bisector of the line connecting the first and second state positions of the second rotating shaft 62.

[0055] By optimizing the position and structure of the first rotating shaft 61 and the second rotating shaft 62, the overall flipping structure 100 achieves smooth and efficient flipping. The scientific layout of the turning points ensures the stability of the structure and the smoothness of movement during the flipping process. More specifically, placing the first rotating shaft 61 on the vertical line between the two endpoints of the drive rod 33 during movement allows the overall structure to maintain balance during flipping, avoiding motion deviation or vibration problems caused by improper turning point positions.

[0056] The drive assembly 30 includes a standard cylinder with a stroke greater than 100 mm. The tilting arm 20 has a tilting angle of not less than 80° and not more than 90° from the first state to the second state. It is understood that the application scenario of this utility model is mainly to drive the tilting of large loads with large tilting angles, considering the higher requirements for driving force and stability.

[0057] By adopting a standard cylinder and a matching tilting arm 20, the tilting arm 20 can be clamped or opened by utilizing the telescopic function of the standard cylinder telescopic rod. This optimizes the structural design of the tooling, improves the stability of the tilting mechanism 100, and provides a more efficient solution for the design and application of tooling.

[0058] In specific applications, the tilting mechanism 100, which drives the large load tilting, uses a 63mm diameter standard cylinder with a stroke of 125mm, leaving a 5mm stroke margin, which can drive the tilting arm 20 to tilt 81°; the 80mm diameter standard cylinder with a stroke of 150mm, leaving a 5mm stroke margin, can drive the tilting arm 20 to tilt 90°.

[0059] It is understandable that in other embodiments, considering the diverse backgrounds in actual production, the drive assembly 30 may also employ a thin-diameter cylinder, specifically selectable from 63mm and 80mm cylinder diameters. This variety of cylinders and their diameter selection can meet different load requirements and application scenarios, providing users with flexible solutions. The 63mm cylinder diameter large-tilt mechanism has a different overall structure than the 80mm cylinder diameter structure due to its lower load-bearing capacity, but the working principle is the same. Cylinders of different diameters can be selected according to actual working conditions to ensure optimal performance and efficiency.

[0060] In one embodiment, the flipping mechanism 100 includes a linkage mechanism 70 for limiting the movement of the flipping arm 20 in a second state. The linkage mechanism 70 is connected to the fixed base 10 via a third rotating shaft 63. The first end of the linkage mechanism 70 is rotatably connected to the second connecting part 25, and the second end of the linkage mechanism 70 is rotatably connected to the drive rod 33.

[0061] Combination Figure 8 , 11As shown, the linkage mechanism 70 is connected between the drive assembly 30 and the tilting arm 20. The linkage mechanism 70 includes a first rod 71 and a second rod 72 that are pivotally connected. The first rod 71 is rotatably connected to the fixed base 10 and is T-shaped. The first pivot joint 711 of the first rod 71 is connected to the fixed base 10 via a third rotating shaft 63. The second pivot joint 712 of the first rod 71 is rotatably connected to the drive rod 33, and the third pivot joint 713 of the first rod is rotatably connected to the second rod 72. The second end of the linkage mechanism 70 includes the second pivot joint 712.

[0062] The first pivot joint 711 and the third pivot joint 713 are located at both ends of the first rod 71, and the second pivot joint 712 is located between the first pivot joint 711 and the third pivot joint 713.

[0063] The second rod 72 includes a fourth pivot joint connected to the first rod and a fifth pivot joint 721 connected to the tilting arm 20. The fifth pivot joint 721 is connected to the second connecting portion 25, and the first end of the linkage mechanism 70 includes the fifth pivot joint 721. The fourth pivot joint and the fifth pivot joint 721 are located at both ends of the second rod 72.

[0064] Combination Figure 9-10 As shown, in the first state, the first rod 71 and the second rod 72 are vertically connected, and the first pivot joint 711, the third pivot joint 713, the fourth pivot joint, and the fifth pivot joint 721 are arranged sequentially in the vertical direction. The second pivot joint 712 is connected to the drive rod 33 and is located outside the aforementioned four. In the second state, the second pivot joint 712 rotates downwards, and an angle is formed between the first rod 71 and the second rod 72. The specific tilt angle of the first rod 71 and the second rod 72 will adapt to different rotation angles.

[0065] In the first state, the drive rod 33 has a first position; in the second state, the drive rod 33 has a second position; and the third rotation shaft 63 is located on the perpendicular bisector of the line connecting the first and second positions.

[0066] In the third embodiment described above, the tilting arm 20 is not directly connected to the drive rod 33 via the second connecting part 25, but is connected via the linkage mechanism 70. Therefore, the movement arc of one end of the drive rod 33 no longer revolves around the first rotating shaft 61. The drive rod 33 is connected to the second pivot joint 712, and the first rod 71 is connected to the fixed seat 10 via the third rotating shaft 63. Therefore, the movement trajectory of one end of the drive rod 33 should revolve around the third rotating shaft 63.

[0067] The drive rod 33 is a Y-shaped connector. The first rod 71 is connected to the Y-shaped connector via a second pivot joint 712. The second rotating shaft 62 passes through the second pivot joint 712 and the drive rod 33. The third rotating shaft 63 passes through the first pivot joint 711 and the fixed seat 10. The drive rod 33 has a first position, meaning the position of the second pivot joint 712 or the second rotating shaft 62 in the first state; the drive rod 33 has a second position, meaning the position of the second pivot joint 712 or the second rotating shaft 62 in the second state. Specifically, the third rotating shaft 63 is located on the perpendicular bisector of the line connecting the first and second states of the second pivot joint 712, or the third rotating shaft 63 is located on the perpendicular bisector of the line connecting the first and second states of the second rotating shaft 62.

[0068] The beneficial effects of this utility model are as follows: the first buffer 40 and the second buffer 50 are set to support the flip arm 20 in different motion states to absorb the kinetic energy of the flip arm 20 during rotation and prevent damage to the flip arm 20 and the fixed seat 10 due to inertial impact.

[0069] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0070] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A flipping mechanism, characterized in that, include: The mechanism includes a fixed base, a rotating arm rotatably connected to the fixed base, and a drive assembly for driving the rotating arm to rotate. The rotating mechanism includes a first state and a second state. The rotating arm includes a limiting part, and the fixed base includes a limiting block. In the first state, the limiting part is engaged with the limiting block, and in the second state, the limiting block is moved away from the limiting block. The rotating mechanism includes a first buffer and a second buffer fixed to the fixed base. The first buffer supports a first support part of the rotating arm in the first state, and the second buffer supports a second support part of the rotating arm in the second state.

2. The flipping mechanism according to claim 1, characterized in that, The first support includes an abutment plane formed on the flip arm. In the first state, the abutment plane of the flip arm faces downward and is located directly above the first buffer.

3. The flipping mechanism according to claim 1, characterized in that, The first support includes two first buffer seats symmetrically arranged on two sides of the flipping arm, and the flipping mechanism includes two first buffers that correspond one-to-one with the two first buffer seats.

4. The flipping mechanism according to claim 1, characterized in that, The second support includes two second buffer seats symmetrically arranged on two sides of the flipping arm, and the flipping mechanism includes two second buffers that correspond one-to-one with the two second buffer seats.

5. The flipping mechanism according to claim 1, characterized in that, The tilting arm has a first connecting part and a second connecting part. The first connecting part is rotatably mounted on the fixed base via a first rotating shaft, and the second connecting part is rotatably connected to the drive rod of the drive assembly. In the first state, the drive rod has a first position, and in the second state, the drive rod has a second position. The first rotating shaft is located on the perpendicular bisector of the line connecting the first position and the second position.

6. The flipping mechanism according to claim 5, characterized in that, The drive rod is a Y-shaped connector, and the second connecting part is connected to the Y-shaped connector through a second rotating shaft. The drive rod has a first position, which means the position of the second rotating shaft in the first state; the drive rod has a second position, which means the position of the second rotating shaft in the second state.

7. The flipping mechanism according to claim 1, characterized in that, The flipping mechanism includes a linkage mechanism for limiting the movement of the flipping arm in a second state. The linkage mechanism is connected to the fixed base via a second rotating shaft. The first end of the linkage mechanism is rotatably connected to the second connecting part, and the second end of the linkage mechanism is rotatably connected to the drive rod.

8. The flipping mechanism according to claim 7, characterized in that, In the first state, the drive rod has a first position; in the second state, the drive rod has a second position; and the second rotation axis is located on the perpendicular bisector of the line connecting the first position and the second position.

9. The flipping mechanism according to claim 1, characterized in that, The drive assembly includes a standard cylinder with a stroke greater than 100 mm.

10. The flipping mechanism according to claim 1, characterized in that, The flipping angle of the flipping arm from the first state to the second state is not less than 80° and not greater than 90°.

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