Probe rod penetration pulling mechanism

Abstract

The utility model discloses a probing rod penetration pulling mechanism which comprises two sets of clamping mechanisms, and each clamping mechanism comprises an operating rod, a first connecting rod, a second connecting rod, a third connecting rod, a first sliding block, a second sliding block, a third sliding block, a three-fork connecting rod, a first spring piston, a second spring piston, a parallel connecting rod and a clamping plate. The clamping plates on the two clamping mechanisms are clamped on the two sides of the probe rod respectively. The penetration and pulling mechanism for the probe rod integrates penetration and pulling functions of the probe rod, abandons a complex power system and a control mechanism, adopts a connecting rod structure to realize manual operation, effectively reduces the overall size of the mechanism, is easy to carry and deploy, can overcome the transportation problem in the prior art, and can effectively reduce the transportation cost even in an unfavorable transportation environment. And the continuity and the high efficiency of exploration work can be ensured, so that the increasing flexible operation requirements in the geological exploration field are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of exploration device, especially to a kind of probe rod penetration pulling mechanism. BACKGROUND

[0002] In the field of geological exploration, the probe rod needs to be penetrated into the ground to a certain depth, and then pulled out after data collection. Currently, the widely used probe rod penetration and pulling device in the market generally relies on hydraulic or electric power as the core power source. These devices have integrated complex components such as hydraulic pumps and engines inside. Their structure is complex, bulky and heavy, which undoubtedly brings great challenges to transportation and deployment. Especially in remote, rugged or traffic-restricted special operation areas, such as deep mountains, marshland or narrow streets in cities, large-scale exploration equipment often cannot reach, which seriously restricts the smooth progress of exploration engineering. Therefore, it is necessary to improve. SUMMARY

[0003] Therefore, the utility model provides a kind of probe rod penetration pulling mechanism, which aims to realize the penetration and pulling of probe rod, and has the characteristics of easy to carry.

[0004] The utility model provides the scheme including:

[0005] A kind of probe rod penetration pulling mechanism, including two groups of clamping mechanism, the clamping mechanism includes:

[0006] Operating rod, first connecting rod, second connecting rod, third connecting rod, first sliding block, second sliding block, third sliding block, three-pronged connecting rod, first spring piston, second spring piston, parallel connecting rod and clamping plate;

[0007] The first end of the operating rod is hinged to a fixed position, and the second end of the operating rod is an operating end;

[0008] The first sliding block is slidingly arranged on the operating rod;

[0009] The first end of the first connecting rod is hinged to the first sliding block;

[0010] The first end of the second connecting rod is hinged to the second end of the first connecting rod;

[0011] The first end of the third connecting rod is hinged to the second end of the first connecting rod, and the second end of the third connecting rod is hinged to the clamping plate;

[0012] The second sliding block is hinged to a fixed position, and the second sliding block is slidingly connected with the third connecting rod;

[0013] The third sliding block is slidingly arranged vertically;

[0014] The three-pronged link is hinged to the third sliding block, and the three-pronged link comprises a first connecting part, a second connecting part and a third connecting part extending radially from the hinge point thereof, and the second end of the second link is hinged to the first connecting part;

[0015] The first spring piston comprises a first cylinder, a first spring arranged in the first cylinder and a first piston rod slidingly arranged on the first cylinder, the first cylinder is hinged to the second connecting part of the three-pronged link, and the first piston rod is hinged to the clamping plate;

[0016] The first end of the parallel link is hinged to the third link, and the second end of the parallel link is hinged to the first piston rod, so that the third link and the first piston rod are arranged in parallel;

[0017] The second spring piston comprises a second cylinder, a second spring arranged in the second cylinder and a second piston rod slidingly arranged on the second cylinder, the second cylinder is hinged to the third connecting part of the three-pronged link, and the second piston rod is hinged to the second end of the parallel link; the second spring piston is arranged below the first spring piston;

[0018] When the first spring piston is arranged in an inclined manner and the first piston rod is at a higher end, the probe rod penetration and pulling mechanism is in a penetration operation state; when the first spring piston is arranged in an inclined manner and the first piston rod is at a lower end, the probe rod penetration and pulling mechanism is in a pulling operation state;

[0019] In the penetration operation state, the second spring piston rod is arranged in an inclined manner and the second piston rod is at a higher end, and the second spring in the second spring piston rod is separated from the second piston rod;

[0020] In the pulling operation state, the second spring piston rod is arranged in an inclined manner and the second piston rod is at a higher end, and the inclination of the second spring piston rod in the pulling operation state is smaller than that in the penetration operation state, and the second spring in the second spring piston rod is in a pressing fit with the second piston rod;

[0021] The clamping plates of the two clamping mechanisms are respectively clamped on both sides of the probe rod.

[0022] As a further optional solution, the distance between the second sliding block and the second end of the operating rod is equal to the length of the first link, so that the operating rod and the third link are arranged in parallel.

[0023] As a further optional solution, a first fixed link is further included, and the first fixed link is position-fixed, and the first end of the operating rod is hinged to the first fixed link.

[0024] As a further optional solution, a second fixed link is further included, the second fixed link is position fixed, the second sliding block is hinged to the second fixed link.

[0025] As a further optional solution, a third fixed link is further included, the third fixed link is vertically arranged, and the third sliding block is slidingly arranged on the third fixed link.

[0026] As a further optional solution, a plurality of pressing teeth are arranged on the outer side of the clamping plate.

[0027] As a further optional solution, a plurality of synchronous links are slidingly arranged between the two clamping plates, and the synchronous links are horizontally arranged.

[0028] Compared with the prior art, the probe rod penetrating and pulling mechanism has at least the following beneficial effects:

[0029] The probe rod penetrating and pulling mechanism integrates the penetrating and pulling functions of the probe rod, discards the complex power system and control mechanism, adopts a link structure to realize manual operation, effectively reduces the volume of the mechanism as a whole, makes it easy to carry and deploy, can overcome the transportation problem in the prior art, and can ensure the continuity and efficiency of the exploration work even in an unfavorable transportation environment, thereby meeting the increasing flexible operation demand in the geological exploration field. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural principle schematic view of a probe rod penetrating and pulling mechanism in a penetrating operation state according to an embodiment of the utility model;

[0031] Figure 2 is Figure 1 a structural schematic view of the first spring piston and the second spring piston in the embodiment;

[0032] Figure 3 is Figure 1 a cooperation schematic view of the three-pronged link and the first spring piston and the second spring piston in the embodiment;

[0033] Figure 4 is a structural principle schematic view of a probe rod penetrating and pulling mechanism in a pulling operation state according to an embodiment of the utility model;

[0034] Figure 5 is Figure 4 a structural schematic view of the first spring piston and the second spring piston in the embodiment;

[0035] Figure 6 is Figure 4 a cooperation schematic view of the three-pronged link and the first spring piston and the second spring piston in the embodiment;

[0036] In the figure: T, probe rod;

[0037] 100, operating lever; 101, operating end; 200, first connecting rod; 300, second connecting rod; 400, third connecting rod; 500, first slider; 600, second slider; 700, third slider; 800, three-pronged connecting rod; 801, first connecting portion; 802, second connecting portion; 803, third connecting portion; 900, first spring piston; 901, first cylinder; 902, first spring; 903, first piston rod; 110, second spring piston; 111, second cylinder; 112, second spring; 113, second piston rod; 120, parallel connecting rod; 130, clamping plate; 131, pressure tooth; 140, synchronous connecting rod; 150, first fixed connecting rod; 160, second fixed connecting rod; 170, third fixed connecting rod. DETAILED DESCRIPTION

[0038] The specific embodiments of the present application will be further described in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0039] In the description of the present application, it is understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0040] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] In the present application, unless otherwise specifically defined and limited, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0042] Reference Figures 1-6 The utility model discloses an embodiment shows a kind of probe rod penetration pulling mechanism, including two groups of clamping mechanism, the clamping mechanism includes operating lever 100, first connecting rod 200, second connecting rod 300, third connecting rod 400, first slider 500, second slider 600, third slider 700, three-pronged connecting rod 800, first spring piston 900, second spring piston 110, parallel connecting rod 120 and clamping plate 130;

[0043] The first end of the operating lever 100 is hinged to a fixed position, and the second end of the operating lever 100 is an operating end 101.

[0044] The first slider 500 is slidingly arranged on the operating lever 100.

[0045] The first end of the first connecting rod 200 is hinged to the first slider 500.

[0046] The first end of the second connecting rod 300 is hinged to the second end of the first connecting rod 200.

[0047] The first end of the third connecting rod 400 is hinged to the second end of the first connecting rod 200, and the second end of the third connecting rod 400 is hinged to the clamping plate 130.

[0048] The second slider 600 is hinged to a fixed position, and the second slider 600 is slidingly connected to the third connecting rod 400.

[0049] The third slider 700 is slidingly arranged vertically.

[0050] The three-pronged connecting rod 800 is hinged to the third slider 700, and the three-pronged connecting rod 800 includes a first connecting portion 801, a second connecting portion 802, and a third connecting portion 803 extending radially from its hinge point, and the second end of the second connecting rod 300 is hinged to the first connecting portion 801.

[0051] The first spring piston 900 includes a first cylinder 901, a first spring 902 arranged in the first cylinder 901, and a first piston rod 903 slidingly arranged on the first cylinder 901, the first cylinder 901 is hinged to the second connecting portion 802 of the three-pronged connecting rod 800, and the first piston rod 903 is hinged to the clamping plate 130.

[0052] The first end of the parallel connecting rod 120 is hinged to the third connecting rod 400, and the second end of the parallel connecting rod 120 is hinged to the first piston rod 903, so that the third connecting rod 400 and the first piston rod 903 are arranged in parallel.

[0053] The second spring piston 110 comprises a second cylinder 111, a second spring 112 arranged in the second cylinder 111, and a second piston rod 113 slidingly arranged on the second cylinder 111, the second cylinder 111 is hinged to the third connecting part 803 of the three-pronged connecting rod 800, and the second piston rod 113 is hinged to the second end of the parallel connecting rod 120; the second spring piston 110 is arranged below the first spring piston 900;

[0054] When the first spring piston 900 is arranged obliquely and the first piston rod 903 is the higher end, the probe rod penetration and pulling mechanism is in the penetration operation state; when the first spring piston 900 is arranged obliquely and the first piston rod 903 is the lower end, the probe rod penetration and pulling mechanism is in the pulling operation state;

[0055] In the penetration operation state, the second spring piston 110 rod is arranged obliquely and the second piston rod 113 is the higher end, and the second spring 112 in the second spring piston 110 rod is separated from the second piston rod 113;

[0056] In the pulling operation state, the second spring piston 110 rod is arranged obliquely and the second piston rod 113 is the higher end, and the obliquity of the second spring piston 110 rod in the pulling operation state is smaller than that in the penetration operation state, and the second spring 112 in the second spring piston 110 rod is in extrusion fit with the second piston rod 113;

[0057] The clamping plates 130 on the two clamping mechanisms respectively clamp the two sides of the probe rod T.

[0058] Specifically, the working principle is as follows:

[0059] When the probe rod T penetration operation is performed: as Figures 1-3As shown, the probe rod penetration and pulling mechanism is in the penetration operation state; in which, the first piston rod 903 of the first spring piston 900 is arranged upwardly inclined, at this time, if the worker holds the operation end 101 to pull the operation rod 100 upwardly, the operation rod 100 pulls the second connecting rod 300 and the third connecting rod 400 upwardly through the first connecting rod 200, the second connecting rod 300 pulls the first spring piston 900 upwardly through the three-prong connecting rod 800, the inclination of the first spring piston 900 is thereby reduced, i.e. the first spring piston 900 gradually tends to be horizontal, in the process, the first spring 902 is compressed, and the clamping force provided by the first spring piston 900 to the clamping plate 130 gradually increases; in the above process, the third connecting rod 400 is parallel to the first spring piston 900, the second end of the third connecting rod 400 and the first piston rod 903 of the first spring piston 900 have a tendency to move downwardly and close to the probe rod T, so that the clamping plate 130 can clamp the probe rod T and push the probe rod T downwardly. In the process, the limit position of pulling the operation rod 100 upwardly is the position where the first spring piston 900 is in the horizontal state, at this time, the clamping force provided by the first spring piston 900 is the largest; then press the operation rod 100 downwardly, the inclination of the first spring piston 900 increases, the clamping force provided by the first spring piston 900 decreases, the clamping plate 130 releases the probe rod T, and the second end of the third connecting rod 400 and the first piston rod 903 of the first spring piston 900 will be inclined upwardly and away from the probe rod T; in this way, repeatedly pulling the operation rod 100 upwardly (keeping the second piston rod 113 of the first spring piston 900 as the higher end) and pressing it downwardly, the probe rod T can be penetrated into the geology in segments.

[0060] It should be noted that, in the above process, when the second connecting rod 300 is pulled upwardly, the second connecting rod 300 pulls the first connecting part 801 of the three-prong connecting rod 800 upwardly, according to the perspective of Figure 2 and Figure 3 , the first connecting part 801 itself will promote the three-prong connecting rod 800 to rotate clockwise, but since the first spring 902 in the first spring piston 900 provides a pushing force to the second connecting part 802 away from the probe rod T, the second spring 112 blocks the clockwise rotation of the second connecting part 802, therefore the pulling force of the second connecting rod 300 will drive the three-prong connecting rod 800 and the third sliding block 700 to move upwardly. In the above process, although the inclination of the second spring piston 110 also decreases, there is a certain distance allowance between the second spring 112 and the second piston rod 113, therefore the second spring 112 will not generate a pushing force to the third connecting part 803, i.e. the second spring 112 will not provide a driving force to make the three-prong connecting rod 800 rotate clockwise.

[0061] When the probe rod T pulling operation is performed: as Figures 4-6As shown, the probe rod penetration and pulling mechanism is in the pulling operation state; according to the principle of the penetration operation state described above, it can be known that the clamping force provided by the first spring piston 900 is the largest when the first spring piston 900 is in the horizontal position, if the operating rod 100 is continuously pulled upward, the first spring piston 900 will pass the horizontal position, that is, the first piston rod 903 of the first spring piston 900 is located at the lower end, at this time, the second end of the third connecting rod 400 is inclined downward, as the operating rod 100 is pulled upward, the second end of the third connecting rod 400 and the first piston rod 903 of the first spring piston 900 will have a downward inclined movement trend away from the probe rod T, that is, the clamping force of the clamping plate 130 on the probe rod T becomes smaller until the probe rod T is loosened.

[0062] When the operating rod 100 is pressed downward, the second end of the third connecting rod 400 and the first piston rod 903 of the first spring piston 900 will have a upward inclined movement trend close to the probe rod T, and the second connecting rod 300 pushes the first connecting part 801 downward, according to the perspective of Figure 5 and Figure 6 , the three-pronged connecting rod 800 moves counterclockwise, at this time, the second connecting part 802 drives the first cylinder body 901 away from the clamping plate 130, so that the second spring piston 110 cannot provide clamping force; but the third connecting part 803 pushes the second cylinder body 111, so that the second spring 112 increases the elastic force of the second piston rod 113, the clamping force provided by the second spring piston 110 on the clamping plate 130 becomes larger and larger, so that the clamping force of the clamping plate 130 on the probe rod T is provided by the second spring piston 110. Therefore, the clamping plate 130 can clamp the probe rod T and pull the probe rod T upward by a certain distance. Similarly, repeatedly pulling the operating rod 100 upward and pressing it downward can realize the step-by-step pulling of the probe rod T.

[0063] It should be noted that in the process of converting from the penetration operation state to the pulling operation state, the third sliding block 700 and the three-pronged connecting rod 800 will move upward, and the inclination of the second spring piston 110 will become smaller, when in the pulling operation state, the distance allowance between the second spring 112 and the second piston rod 113 disappears, that is, the second spring 112 abuts against the second piston rod 113, so when the second connecting part 802 pushes the second cylinder body 111, the elastic force of the second spring 112 on the second piston rod 113 increases.

[0064] Briefly, in the penetration operation state, pulling the operating rod 100 upward, the clamping plate 130 will clamp the probe rod T and penetrate downward by a certain distance, pressing the operating rod 100 downward, the clamping plate 130 will loosen the probe rod T; in the pulling operation state, pulling the operating rod 100 upward, the clamping plate 130 will loosen the probe rod T, pressing the operating rod 100 downward, the clamping plate 130 will clamp the probe rod T and pull it upward by a certain distance.

[0065] Thus, the probe insertion and extraction mechanism integrates the insertion and extraction functions of the probe T, eliminating the complex power system and control mechanism. It adopts a linkage structure to achieve manual operation, which effectively reduces the overall size of the mechanism, making it easy to carry and deploy. It can overcome the transportation difficulties in the existing technology and ensure the continuity and efficiency of exploration work even in unfavorable transportation environments, thereby meeting the growing demand for flexible operation in the field of geological exploration.

[0066] In some embodiments, to facilitate the operator's determination of whether the first elastic piston has passed the horizontal position, thereby facilitating the determination of whether the probe insertion and extraction mechanism is in the insertion operation state or the extraction operation state, such as... Figure 1 As shown, in this embodiment, the distance between the first end of the operating rod 100 and the second slider 600 is set to be the same as the length of the second connecting rod 300, so that the operating rod 100 is parallel to the third connecting rod 400; in this way, the operator only needs to observe with the naked eye whether the operating end 101 of the operating rod 100 is tilted upward or downward to determine whether the probe insertion and pulling mechanism is in the insertion operation state or the pulling operation state.

[0067] In the above scheme, in order to facilitate the fixing of the position of the first end of the operating lever 100, a first fixed connecting rod 150 is also included. The first fixed connecting rod 150 is fixed in position, and the first end of the operating lever 100 is hinged to the first fixed connecting rod 150.

[0068] To facilitate fixing the position of the second slider 600, such as Figure 1 As shown, it also includes a second fixed link 160, the second fixed link 160 is fixed in position, and the second slider 600 is hinged to the second fixed link 160.

[0069] To facilitate the vertical sliding of the third slider 700, such as Figure 1 As shown, it also includes a third fixed link 170, which is vertically arranged, and the third slider 700 is slidably arranged on the third fixed link 170.

[0070] In some embodiments, the first fixing link 150, the second fixing link 160, and the third fixing link 170 can be disposed on a bracket. When the bracket is fixed, the first fixing link 150, the second fixing link 160, and the third fixing link 170 are all fixed.

[0071] In some embodiments, to improve the clamping stability of the clamping plate 130 on the probe T, such as Figure 1 and Figure 2 As shown, the outer side of the clamping plate 130 is provided with several pressure teeth 131. In this way, the clamping plate 130 is pressed against the probe T by the pressure teeth 131, increasing the pressure on the probe T and improving the clamping stability.

[0072] In some embodiments, to improve the symmetry and synchronization between the two clamping plates 130 of the two sets of clamping mechanisms, as shown, a plurality of synchronous connecting rods 140 are arranged to slide between the two clamping plates 130, and the synchronous connecting rods 140 are horizontally arranged. In this way, the movement of the two clamping plates 130 is more synchronized, and it is ensured that the two clamping plates 130 are always located at symmetrical positions on both sides of the probe rod T, thereby improving the clamping stability of the probe rod T. Figure 1

[0073] It should be noted that the synchronous connecting rods 140 are arranged on the outer side of the probe rod T and not through the probe rod T.

[0074] In the above embodiments, the description of each embodiment is focused on, and the part not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0075] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and substitutions can be made, and these improvements and substitutions should also be considered as the protection scope of the present application.​

Claims

1. A probe rod penetration and extraction mechanism characterized by, The device comprises two sets of clamping mechanisms, which include: an operating rod, a first connecting rod, a second connecting rod, a third connecting rod, a first sliding block, a second sliding block, a third sliding block, a three-pronged connecting rod, a first spring piston, a second spring piston, a parallel connecting rod and a clamping plate; a first end of the operating rod is hinged to a fixed position, and a second end of the operating rod is an operating end; the first sliding block is slidingly arranged on the operating rod; a first end of the first connecting rod is hinged to the first sliding block; a first end of the second connecting rod is hinged to a second end of the first connecting rod; a first end of the third connecting rod is hinged to a second end of the first connecting rod, and a second end of the third connecting rod is hinged to the clamping plate; the second sliding block is hinged to a fixed position, and the second sliding block is slidingly connected to the third connecting rod; the third sliding block is slidingly arranged vertically; the three-pronged connecting rod is hinged to the third sliding block, and the three-pronged connecting rod includes a first connecting part, a second connecting part and a third connecting part extending radially from a hinging point thereof, and a second end of the second connecting rod is hinged to the first connecting part; the first spring piston includes a first cylinder, a first spring arranged in the first cylinder and a first piston rod slidingly arranged on the first cylinder, the first cylinder is hinged to the second connecting part of the three-pronged connecting rod, and the first piston rod is hinged to the clamping plate; a first end of the parallel connecting rod is hinged to the third connecting rod, and a second end of the parallel connecting rod is hinged to the first piston rod, so that the third connecting rod and the first piston rod are arranged in parallel; the second spring piston includes a second cylinder, a second spring arranged in the second cylinder and a second piston rod slidingly arranged on the second cylinder, the second cylinder is hinged to the third connecting part of the three-pronged connecting rod, and the second piston rod is hinged to the second end of the parallel connecting rod; the second spring piston is arranged below the first spring piston; when the first spring piston is arranged in an inclined manner and the first piston rod is at a higher end, the probe rod penetrating and pulling mechanism is in a penetrating operation state; when the first spring piston is arranged in an inclined manner and the first piston rod is at a lower end, the probe rod penetrating and pulling mechanism is in a pulling operation state; in the penetrating operation state, the second spring piston rod is arranged in an inclined manner and the second piston rod is at a higher end, and the second spring in the second spring piston rod is separated from the second piston rod; in the pulling operation state, the second spring piston rod is arranged in an inclined manner and the second piston rod is at a higher end, the inclination of the second spring piston rod in the pulling operation state is smaller than that in the penetrating operation state, and the second spring in the second spring piston rod is in a pressing fit with the second piston rod; the clamping plates of the two sets of clamping mechanisms are respectively clamped on both sides of the probe rod.

2. The probe rod penetrating and withdrawing mechanism according to claim 1, characterized by The distance between the second sliding block and the second end of the operating rod is equal to the length of the first connecting rod, so that the operating rod and the third connecting rod are arranged in parallel.

3. The probe rod penetrating and withdrawing mechanism according to claim 2, characterized by a first fixed connecting rod is further included, the first fixed connecting rod is fixed in position, and a first end of the operating rod is hinged to the first fixed connecting rod.

4. The probe rod penetrating and withdrawing mechanism according to claim 2, characterized by A second fixed connecting rod is further included, which is position-fixed, and the second sliding block is hingedly connected to the second fixed connecting rod.

5. The probe rod penetrating and withdrawing mechanism according to claim 2, characterized by A third fixed connecting rod is further included, which is vertically arranged, and the third sliding block is slidingly arranged on the third fixed connecting rod.

6. The probe rod penetrating and withdrawing mechanism according to claim 1, characterized by The outer side of the clamping plate is provided with a plurality of pressing teeth.

7. The probe rod penetrating and withdrawing mechanism according to claim 1, wherein A plurality of synchronous connecting rods are slidingly arranged between the two clamping plates, and the synchronous connecting rods are horizontally arranged.

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