Lifting structure and fixing device

Abstract

The invention discloses a lifting structure and a fixing device, and relates to the technical field of mining machinery, in particular to the lifting structure and the fixing device which comprise the lifting structure, a transportation platform, pile legs arranged on the outer wall of the transportation platform, trestles connected to the two ends of the transportation platform and driving parts arranged on the outer walls of the pile legs. The device has the beneficial effects that the transportation platform can be opened up and down, a winch and a pulley are matched to enable trestles at the two ends to be rapidly folded and then matched with a gear box to ascend and descend, and a lifting structure can be driven by a vehicle or a device to move; and the stability of the trestle during traffic can be greatly improved, and the service life is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of mining machinery, in particular to a lifting structure and a fixing device. Background Art

[0002] Open-pit mines refer to workplaces where stripping and mining are carried out directly on the surface. In open-pit coal mines, the crossing routes of dump trucks and coal trucks will bring great safety hazards. Ensure safe production. Coal mine trestles can reduce the risk of accidents during transportation and improve the safety of coal mine production. In the existing coal trestles structure plan, the coal conveyor belt needs to be equipped with a separate steel support to support the belt, and the truss occupies a large space under the bridge deck, which will be restricted in some sections where traffic is required.

[0003] In order to solve the above problems, existing open-pit mines will set up concrete cement bridges on the south side of the mine, and vehicles can go on and under the bridge to solve the problem of the crossing routes of earth dumpers and coal trucks. However, concrete cement bridges cannot be moved. Once the boundary of the open-pit mine moves to a longer distance, the original concrete cement bridge will not be able to function, and a new concrete bridge needs to be rebuilt, which has high duplication costs. In the case of existing open-pit mines choosing temporary trestles, when vehicles travel on the trestles, lateral dynamic loads will be generated on the trestles, which will cause lateral deformation and displacement of the entire steel structure bridge. Then, when vehicles travel on the trestles, the entire trestles may produce tiny and frequent shaking, affecting the life of the bridge and the driver's sense of safety. Summary of the invention

[0004] Some simplifications or omissions may be made in this section and the abstract and title of the present application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In view of the above problems or problems existing in the prior art, the present invention is proposed.

[0006] Therefore, the purpose of the present invention is to provide a lifting structure that can solve the problem that the open-pit mine truss occupies a large space under the bridge deck and cannot be used for traffic, and the concrete cement bridge cannot be moved and needs to be repeatedly built.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: a lifting structure, which includes a lifting structure, a transport platform, pile legs arranged on the outer wall of the transport platform, a trestle connected to both ends of the transport platform, and a driving member arranged on the outer wall of the pile legs.

[0008] As a preferred solution of the lifting structure of the present invention, four pile legs are arranged through the transport platform, and the pile legs are composed of a gear box and a gear column slidably matched with the gear box.

[0009] As a preferred solution of the lifting structure of the present invention, the trestle is hingedly connected to the transport platform, and a protective frame is respectively provided on the outer wall of the trestle near both ends.

[0010] As a preferred solution of the lifting structure of the present invention, the end of the trestle bridge close to the transport platform for connection is a narrow inner bridge, and the end of the trestle bridge away from the transport platform is a wide outer bridge.

[0011] As a preferred solution of the lifting structure of the present invention, first pulleys are provided at both ends of the wide outer bridge, two winches are provided at each end of the transport platform not connected to the pier, and a winch rope is connected between the winch and the first pulley.

[0012] The beneficial effects of the lifting structure of the present invention are as follows: driven by the gear box, the transport platform can rise to vacate the space under the bridge deck so that vehicles can pass up and down the transport platform. The winch and pulley can cooperate to quickly retract the trestles at both ends and then cooperate with the gear box to lift and lower. The lifting structure can be disassembled or directly driven by a vehicle or device to move.

[0013] Another object of the present invention is to provide a fixing device, the purpose of which is to solve the problems of the trestle shaking when the vehicle is moving, short service life and low stability.

[0014] In order to solve the technical problem of low traffic stability of the above-mentioned pier, the present invention also provides the following technical solutions: a fixing device, which includes a lifting structure; and a clamping unit, which includes a clamping plate, and clamping connecting rods arranged at both ends of the clamping plate, one end of the clamping connecting rod is connected to the pier.

[0015] The hydraulic unit is provided with a lower adjusting cylinder connected to one end of the clamping plate, and the end of the lower adjusting cylinder not connected to the clamping plate is connected to the clamping connecting rod; an upper adjusting cylinder connected to the trestle is provided, and the end of the upper adjusting cylinder not connected to the trestle is connected to the clamping connecting rod.

[0016] As a preferred solution of the fixing device of the present invention, there are at least two clamping connecting rods on the clamping plate.

[0017] As a preferred solution of the fixing device of the present invention, the outer wall of the clamping connecting rod is provided with a lower adjusting cylinder and an upper adjusting cylinder.

[0018] As a preferred solution of the fixing device described in the present invention, wherein: the clamping plate is hingedly connected to the clamping connecting rod; the clamping connecting rod is hingedly connected to the trestle, the clamping plate is hingedly connected to the lower adjusting cylinder, the lower adjusting cylinder is hingedly connected to the clamping connecting rod, the upper adjusting cylinder is hingedly connected to the trestle, and the upper adjusting cylinder is hingedly connected to the clamping connecting rod.

[0019] As a preferred solution of the fixing device of the present invention, the lower adjusting cylinder is located on the side of the outer wall of the clamping connecting rod close to the clamping plate, and the upper adjusting cylinder is located on the side of the outer wall of the clamping connecting rod away from the clamping plate.

[0020] The fixing device of the present invention has the beneficial effect that when the pressing plate uses the mass of the whole device and the hydraulic unit to press the slope of the soil pile in the open-pit mine, the stability and service life of the trestle when it is open to traffic can be greatly increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0022] Figure 1 It is an overall three-dimensional schematic diagram of the lifting structure and fixing device.

[0023] Figure 2 It is an overall three-dimensional schematic diagram of the lifting structure and fixing device.

[0024] Figure 3 It is an overall three-dimensional enlarged schematic diagram of the fixing device. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0028] Example 1

[0029] Reference Figures 1-2, which is the first embodiment of the present invention, provides a lifting structure, which includes a transportation platform 101, pile legs 102 that penetrate the outer wall of the transportation platform 101, the transportation platform 101 is movably connected to the pile legs 102, a pier 103 connected to both ends of the transportation platform 101, and a driving member 104 that is arranged on the outer wall of the pile legs 102.

[0030] The transport platform 101 can be in a circular, square or other shapes. In this solution, a square shape is selected. The pile legs 102 are arranged at the four corners of the square transport platform 101. The top of the pile legs 102 is higher than the side of the transport platform 101 away from the ground. The transport platform 101 can move up and down along the outer wall of the pile legs 102 by penetrating its own pile legs 102. It should be noted that the transport platform 101 can move up and down in various ways, such as traction lifting, gear lifting, hydraulic lifting, etc. The trestle 103 is composed of a plurality of frame cross beams and frame vertical beams intersecting each other. The trestle 103 is connected to both ends of the transport platform 101. It should be noted that the two ends of the transport platform 101 connected to the trestle 103 are not adjacent. The trestle 103 itself is overlapped on the top of the earth pile in the open-pit mine for vehicles to go to the transport platform 101. The function of the driving member 104 is to provide driving force for the device that actually enables the transport platform 101 to realize the lifting function. It should be noted that the driving member 104 is the component required for driving, which can be an electric connecting rod driving the transport platform 101, a fuel connecting rod driving the transport platform 101, a hydraulic connecting rod driving the transport platform 101, etc.

[0031] When in use, the transport platform 101 is driven by the driving member 104 to rise to the working position on the pile legs 102, and the trestles 103 at both ends are overlapped on the top of the earth pile in the open-pit mine. The mining vehicles that need to use the transport platform 101 drive onto the transport platform 101 through the trestles 103 at one end at the starting point and then go to the destination from the trestles 103 at the other end. The vehicles that need to pass from the ground start to go to the destination after the transport platform 101 is raised to a passable height. When not in use or when the lifting structure needs to be moved, the transport platform 101 is lowered to the lowest position on the pile legs 102. At this time, the parts can be disassembled or the lifting structure 100 can be directly moved by vehicles or other large heavy object transportation devices.

[0032] In summary, by raising the transport platform 101, traffic can pass under the transport platform 101. After the trestles 103 at both ends are overlapped on the top of the open-pit mine pile, vehicles can go through the transport platform 101 on the trestles 103 to the other end of the trestles 103 to achieve traffic above, thus achieving up and down traffic. When the transport platform 101 drops to the lowest point, the overall lifting structure 100 can be moved by vehicles or other large heavy object transportation devices, thus achieving movable flexibility.

[0033] Example 2

[0034] Reference Figures 1-2 , which is the second embodiment of the present invention, is different from the first embodiment in that it also includes four pile legs 102 penetrating the transport platform 101, and the pile legs 102 are composed of a gear box 102a and a gear column 102b slidingly matched with the gear box 102a.

[0035] Among them, the pile legs 102 are penetrated with four on the transport platform 101, which can greatly improve the stability of the transport platform 101 when in use. It should be noted that the gear box 102a is composed of multiple gears. The gear box 102a only needs to have the output of driving the transport platform 101 to move up and down in the driving member. The position of the gear box 102a is not limited. The gear box 102a can be on any side of the transport platform 101 as long as it can achieve the purpose of driving the transport platform 101. The gear column 102b only needs to cooperate with the gear box 102a to enable the gear box 102a to drive the transport platform 101 to move up and down. The gear box 102a is driven by any type of driving member 104 to move on the gear column 102b. It should be noted that any driving member 104 can be driven by an electric connecting rod, a fuel connecting rod, a hydraulic connecting rod, etc.

[0036] Furthermore, the trestle bridge 103 is hingedly connected to the transport platform 101 , and a protective frame 103 a is respectively provided on the outer wall of the trestle bridge 103 near both ends.

[0037] Among them, it should be noted that the hinge connection means that the connected components cannot move relative to each other at the connection point, but can rotate relative to each other. The hinge connection takes into account the stability of the overall structure while ensuring a certain degree of flexibility. The protective frame 103a is on both ends of the use surface of the trestle 103 that are not used for vehicle entry and exit. It should be noted that the use surface is the surface contacted by the tires when the vehicle drives onto the trestle 103 in actual use. The protective frame 103a is connected to the working surface of the trestle 103. The protective frame 103a is composed of a plurality of frame cross beams and frame vertical beams that intersect with each other and inclined beams. The protective frame 103a can improve the safety of the trestle 103 when in use.

[0038] Furthermore, the end of the trestle bridge 103 close to the transportation platform 101 for connection is a narrow inner bridge 103b, and the end of the trestle bridge 103 away from the transportation platform 101 is a wide outer bridge 103c.

[0039] Furthermore, first pulleys 103b-1 are provided at both ends of the wide outer bridge 103c, and two winches 101a are provided at both ends of the transport platform 101 that are not connected to the pier 103, and a rope 101b is connected between the winch 101a and the first pulley 103b-1.

[0040] The first pulley 103b-1 is connected to the winch 101a by a rope 101b, and the first pulley 103b is located on both ends of the wide outer bridge 103c beyond the narrow inner bridge 103b, and each winch 101a is connected to a first pulley 103b-1. It should be noted that the first pulley 103b-1 is a pulley block with a labor-saving function, and starting the winch 101a can cause the trestle 103 at both ends of the transport platform to be pulled up by the rope 101b through the rope 101b and the first pulley 103b-1.

[0041] When in use, the gear box 102a is driven by any type of driving member 104 to move on the gear column 102b. When the transportation platform 101 is needed, the driving member 104 drives the gear box 102a to drive the transportation platform 101 to rise. When the transportation platform 101 rises to the specified position and stops, the winch 101a rotates to loosen the rope 101b to rotate the trestle 103 and the wide outer bridge 103c is overlapped on the top of the earth pile in the open-pit mine. At this time, the vehicle can pass under and above the transportation platform 101. When the lifting structure 100 is not in use or needs to be moved, the winch 101a rotates and tightens the rope 101b to rotate the trestles 103 to widen the outer bridge 103c and leave the open-pit mine. When the trestles 103 are folded up, the trestles 103 at both ends of the transport platform 101 are away from the trestles 103 and one end of the transport platform 101 contacts each other, and the gear box 102a is started to lower the transport platform 101 to the lowest height. At this time, the components can be disassembled or the pile legs 102 can be directly moved by vehicles or large heavy object transport devices to drive the entire structure to move.

[0042] In summary, by driving the gear box 102a to raise the transport platform 101, traffic can be passed under the transport platform 101. After the trestles 103 at both ends are overlapped on the top of the soil pile in the open-pit mine, vehicles can pass through the trestles 103 to the transport platform 101 to the other end of the trestles 103, and traffic can be passed above, thus realizing up and down traffic in the open-pit mine environment. The winch 101a and the first pulley 103b-1 can cooperate to retract the trestles 103 at both ends and then cooperate with the gear box 102a to rise and fall. When the transport platform 101 drops to the lowest point, the detachable parts can be used or the pile legs 102 can be directly moved by vehicles or other large heavy object transportation devices to drive the overall lifting structure 100, thereby realizing movable flexibility.

[0043] Example 3

[0044] Reference Figures 1 to 3, which is the third embodiment of the present invention, and is different from the previous two embodiments in that this embodiment further provides a fixing device: including a lifting structure, and a clamping unit 200, which includes a clamping plate 201, and clamping connecting rods 202 arranged at both ends of the clamping plate 201, one end of the clamping connecting rod 202 is connected to the trestle 103; a hydraulic unit 300, a lower adjusting cylinder 301 connected to one end of the clamping plate 201, and the end of the lower adjusting cylinder 301 not connected to the clamping plate 201 is connected to the clamping connecting rod 202; an upper adjusting cylinder 302 connected to the trestle 103, and the end of the upper adjusting cylinder 302 not connected to the trestle 103 is connected to the clamping connecting rod 202.

[0045] Among them, all the connection relationships are active connections, and the clamping link 202 can be selected from telescopic links, elastic links, rigid links, etc. The lower adjusting cylinder 301 and the upper adjusting cylinder 302 are both common hydraulic cylinders. Their role in this scheme is to assist the clamping link 202 in clamping the clamping plate 201 so that the clamping plate 201 is close to the non-top surface of the soil pile in the open-pit mine.

[0046] Furthermore, at least two clamping connecting rods 202 are provided on the clamping plate 201 .

[0047] Among them, there are no less than two clamping links 202 on the clamping plate 201. When there is only one clamping link 202 on the clamping plate 201, the force on the clamping plate 201 will be uneven, and the clamping plate 201 will easily break, which is not conducive to the long-term use of the device. It should be noted that the clamping links 202 are located on the two opposite surfaces adjacent to the working surface of the clamping plate 201. Here, the working surface of the clamping plate 201 refers to the side of the clamping plate 201 that directly contacts the soil pile in the open-pit mine.

[0048] Furthermore, a lower adjusting cylinder 301 and an upper adjusting cylinder 302 are provided on the outer wall of the clamping connecting rod 202 .

[0049] The lower adjusting cylinder 301 and the upper adjusting cylinder 302 are not adjacent to each other, but are spaced apart from each other. The lower adjusting cylinder 301 and the upper adjusting cylinder 302 are on different surfaces of the outer wall of the clamping connecting rod 202 .

[0050] Furthermore, the clamping plate 201 is hinged to the clamping link 202; the clamping link 202 is hinged to the pier 103, the clamping plate 201 is hinged to the lower adjusting cylinder 301, the lower adjusting cylinder 301 is hinged to the clamping link 202, the upper adjusting cylinder 302 is hinged to the pier 103, and the upper adjusting cylinder 302 is hinged to the clamping link 202.

[0051] Among them, the hinge connection means that the connected components cannot move relative to each other at the connection point, but can rotate relative to each other. The hinge connection ensures a certain degree of flexibility while taking into account the stability of the overall structure.

[0052] Furthermore, the lower adjusting cylinder 301 is located on a side of the outer wall of the clamping connecting rod 202 close to the clamping plate 201 , and the upper adjusting cylinder 302 is located on a side of the outer wall of the clamping connecting rod 202 away from the clamping plate 201 .

[0053] When in use, the gear box 102a is driven by any type of driving member 104 to move on the gear column 102b. When the transportation platform 101 is needed, the driving member 104 drives the gear box 102a to drive the transportation platform 101 to rise. When the transportation platform 101 rises to the specified position and stops, the winch 101a rotates to loosen the rope 101b to rotate the wide outer bridge 103c of the trestle 103 to overlap the top of the soil pile in the open-pit mine. When the wide outer bridge 103c of the trestle 103 is overlapped on the top of the soil pile in the open-pit mine, the clamping plate 201 is under the mass pressure of the entire device, and the hydraulic thrust provided by the lower adjusting cylinder 301 and the upper adjusting cylinder 302 on the clamping connecting rod 202 is close to the non-top surface of the soil pile in the open-pit mine. When the clamping plate 201 is close to the non-top surface of the soil pile in the open-pit mine, the stability of the vehicle passing when the trestle 103 is overlapped on the top of the open-pit mine is greatly increased, and the vehicle can pass under and above the transportation platform 101. When the lifting structure 100 is not in use or needs to be moved, the winch 101a rotates and tightens the rope 101b to rotate the trestles 103 to widen the outer bridge 103c and leave the open-pit mine. When the trestles 103 are folded up, the trestles 103 at both ends of the transport platform 101 are away from the trestles 103 and one end of the transport platform 101 contacts each other, and the gear box 102a is started to lower the transport platform 101 to the lowest height. At this time, the components can be disassembled or the pile legs 102 can be directly moved by vehicles or large heavy object transport devices to drive the entire structure to move.

[0054] In summary, by driving the gear box 102a to raise the transport platform 101, traffic can be passed under the transport platform 101. After the trestles 103 at both ends are overlapped on the top of the open-pit mine, vehicles can pass through the trestles 103 to the transport platform 101 on the other end to achieve traffic on the top. When the trestles 103 are overlapped on the top of the open-pit mine, the clamping plate 201 uses the hydraulic unit 300 to press the slope of the open-pit mine mound, which can greatly increase the stability of the trestles 103 when passing through the traffic and extend the service life of the trestles 103, thereby achieving up and down traffic in the open-pit mine environment. The winch 101a and the first pulley 103b-1 can cooperate to retract the trestles 103 at both ends and then cooperate with the gear box 102a to rise and fall. When the transport platform 101 drops to the lowest point, the detachable parts or directly move the pile legs 102 through vehicles or other large heavy object transportation devices to drive the overall lifting structure 100, thereby achieving movable flexibility.

[0055] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0056] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0057] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A lifting structure (100), characterized in that: The invention comprises a transport platform (101), pile legs (102) arranged on the outer wall of the transport platform (101), piers (103) connected to both ends of the transport platform (101), and a driving member (104) arranged on the outer wall of the pile legs (102).

2. The lifting structure according to claim 1, characterized in that: Four pile legs (102) are provided through the transport platform (101), and the pile legs (102) are composed of a gear box (102a) and a gear column (102b) that is slidably matched with the gear box (102a).

3. The lifting structure according to claim 2, characterized in that: The trestle (103) is hingedly connected to the transport platform (101), and a protective frame (103a) is respectively provided on the outer wall of the trestle (103) near both ends.

4. The lifting structure according to claim 3, characterized in that: The end of the trestle (103) close to the transport platform (101) for connection is a narrow inner bridge (103b), and the end of the trestle (103) away from the transport platform (101) is a wide outer bridge (103c).

5. The lifting structure according to claim 4, characterized in that: The wide outer bridge (103c) is provided with a first pulley (103b-1) at both ends, and the transport platform (101) is provided with two winches (101a) at both ends not connected to the pier (103), and a winch rope (101b) is connected between the winch (101a) and the first pulley (103b-1).

6. A fixing device, characterized in that: It comprises the lifting structure according to any one of claims 1 to 5, and a clamping unit (200), which comprises a clamping plate (201), clamping connecting rods (202) arranged at both ends of the clamping plate (201), and one end of the clamping connecting rod (202) is connected to the trestle (103); The hydraulic unit (300) is provided with a lower adjustment cylinder (301) connected to one end of the clamping plate (201), and the end of the lower adjustment cylinder (301) not connected to the clamping plate (201) is connected to a clamping connecting rod (202); and an upper adjustment cylinder (302) connected to the trestle (103), and the end of the upper adjustment cylinder (302) not connected to the trestle (103) is connected to a clamping connecting rod (202).

7. The fixing device according to claim 6, characterized in that: No less than two clamping connecting rods (202) are provided on the clamping plate (201).

8. The fixing device according to claim 7, characterized in that: The outer wall of the clamping connecting rod (202) is provided with a lower adjusting oil cylinder (301) and an upper adjusting oil cylinder (302).

9. The fixing device according to claim 8, characterized in that: The clamping plate (201) is hingedly connected to the clamping connecting rod (202); the clamping connecting rod (202) is hingedly connected to the trestle (103); the clamping plate (201) is hingedly connected to the lower adjusting oil cylinder (301); the lower adjusting oil cylinder (301) is hingedly connected to the clamping connecting rod (202); the upper adjusting oil cylinder (302) is hingedly connected to the trestle (103); and the upper adjusting oil cylinder (302) is hingedly connected to the clamping connecting rod (202).

10. The fixing device according to claim 9, characterized in that: The lower adjustment cylinder (301) is located on a side of the outer wall of the clamping connecting rod (202) close to the clamping plate (201), and the upper adjustment cylinder (302) is located on a side of the outer wall of the clamping connecting rod (202) away from the clamping plate (201).

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