A manhole cover opening tool

Abstract

The application belongs to the technical field of engineering construction, and particularly relates to a well lid opening tool. The well lid opening tool comprises a first jaw body, a second jaw body, a first connecting rod, a second connecting rod and a cable. The first jaw body comprises a jaw arm and an operating arm arranged in sequence, and the operating arm is provided with a sliding groove. The second jaw body is rotationally connected to the first jaw body, the first jaw body and the jaw arm are oppositely arranged, and the first jaw body and the jaw arm form a jaw gap. The first connecting rod is rotationally connected to the second jaw body, and the first connecting rod and the operating arm are oppositely arranged. The second connecting rod is arranged between the first connecting rod and the operating arm, one end of the second connecting rod is slidingly arranged in the sliding groove, and the other end of the second rod body is rotationally connected to the first connecting rod. The cable is connected to the first jaw body. The well lid opening tool can reliably clamp the well lid by pressing the operating arm, so that the phenomenon of affecting the opening of the well lid caused by the second jaw body and the jaw arm being loosened from the well lid can be avoided, and the operation efficiency of the well lid is improved.

Description

Technical Field

[0001] This application belongs to the field of engineering construction technology, specifically relating to a manhole cover opening tool. Background Technology

[0002] In the field of engineering surveying, the opening and investigation of manholes is the main survey method in pipeline surveys. However, in the implementation of traditional engineering pipeline detection projects, there is a phenomenon that the opening tools become loose from the manhole covers, which affects the efficiency of manhole cover opening operations. Summary of the Invention

[0003] In view of the above-mentioned technical problems, this application provides a manhole cover opening tool, which aims to improve the operation efficiency of manhole cover opening to at least a certain extent.

[0004] This application is achieved through the following technical solution:

[0005] A manhole cover opening tool includes: a first clamp body comprising a clamp arm and an operating arm arranged sequentially, the operating arm having a groove; a second clamp body rotatably connected to the first clamp body, the first clamp body and the clamp arm being disposed opposite each other, the first clamp body and the clamp arm forming a jaw; a first connecting rod rotatably connected to the second clamp body, the first connecting rod and the operating arm being disposed opposite each other; a second connecting rod disposed between the first connecting rod and the operating arm, one end of the second connecting rod being slidably disposed in the groove, the other end of the second connecting rod being rotatably connected to the first connecting rod; and a cable connected to the first clamp body.

[0006] When opening a manhole cover using the manhole cover opening tool provided in this application, the second clamp is placed inside the opening of the manhole cover, and the first connecting rod is placed on the top surface of the manhole cover. Since the second connecting rod is located between the first connecting rod and the operating arm, one end of the second connecting rod is slidably disposed in the groove, and the other end of the second rod is rotatably connected to the first connecting rod. When the operating arm is pressed, one end of the second connecting rod will slide away from the end of the clamp arm in the groove, and through the second connecting rod, it will drive the first connecting rod to move closer to the operating arm, thereby driving the second clamp to move closer to the clamp arm to narrow the jaws until the second clamp and clamp arm can grip the manhole cover. If the operating arm is pressed further, the second connecting rod will continue to rotate towards the first connecting rod until the second connecting rod and the first connecting rod are locked, so that the second clamp and clamp arm can reliably grip the manhole cover and prevent the second clamp and clamp arm from coming loose from the manhole cover. Then, the user can pull up the cable to lift the manhole cover and open it to facilitate subsequent construction.

[0007] The manhole cover opening tool provided in this application can lock the first and second connecting rods that drive the second clamp and clamp arm by pressing the operating arm, thereby enabling the second clamp and clamp arm to reliably clamp the manhole cover and avoiding the phenomenon of the second clamp and clamp arm becoming loose from the manhole cover, thus improving the operating efficiency of the manhole cover.

[0008] In some implementations, the opposing sides of the clamp arms and the first clamp body are both concave arc shapes.

[0009] In some embodiments, at least a portion of the opposing sides of the clamp arms and the first clamp body are serrated.

[0010] In some embodiments, the first link has a first rod body and a second rod body connected together, the first rod body is disposed between the second clamp body and the second rod body, the first link is rotatably connected to the second clamp body, and the distance from the second rod body to the operating arm is greater than the distance from the first rod body to the operating arm.

[0011] In some implementations, at least a portion of the first link is recessed on the side opposite to the operating arm.

[0012] In some implementations, the opening tool further includes: a first adjusting member threadedly connected to the operating arm, the first adjusting member extending from the end of the operating arm away from the clamp arm to the slide groove, and one end of the second connecting rod abutting against the adjusting member.

[0013] In some embodiments, the operating arm has a receiving groove and an adjustment hole at its end facing the clamp arm. The opening of the receiving groove faces the second clamp body. The adjustment hole extends from the side of the operating arm away from the second clamp body to the bottom of the receiving groove. The adjustment hole has a plurality of positioning grooves spaced apart on at least one side along the length direction of the operating arm. The end of the clamp arm facing the operating arm is located in the receiving groove and is rotatably connected to the operating arm. The opening tool also includes a second adjusting member. One end of the second adjusting member is connected to the clamp arm, and the other end of the second adjusting member moves through the adjustment hole. The other end of the second adjusting member can be moved to switch to one of the positioning grooves.

[0014] In some embodiments, the other end of the second adjustment member is connected to a gripping member that protrudes from the side of the operating arm facing away from the second clamp body.

[0015] In some implementations, the manhole cover opening tool further includes an elastic element connecting the operating arm and the second clamp body.

[0016] In some embodiments, the opening tool further includes a grip lever connected to the cable. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 The following is a schematic diagram of the structure of the manhole cover opening tool a in some embodiments of this application;

[0019] Figure 2 It shows Figure 1 Another structural diagram from a different perspective;

[0020] Figure 3 A partial schematic diagram of manhole cover b is shown;

[0021] Figure 4 This shows a schematic diagram of the manhole cover opening tool a in its first state;

[0022] Figure 5 A schematic diagram of the manhole cover opening tool a in its second state is shown.

[0023] Explanation of reference numerals in the attached figures:

[0024] a. Manhole cover opening tools;

[0025] 100. First clamp body; 101. Clamp arm; 102. Operating arm; 103. Slide groove; 104. Receiving groove; 105. Adjustment hole; 106. Positioning groove; 107. Hanging ring;

[0026] 200. Second clamp body; 201. First connecting part; 202. Second connecting part; 203. Connecting hole;

[0027] 300, First link; 301, First link; 302, Second link;

[0028] 400, Second Link;

[0029] 500. Cable;

[0030] 600. First adjusting component;

[0031] 700. Second adjusting component; 701. Holding component;

[0032] 800. Elastic components;

[0033] 900. Grip;

[0034] b. Manhole cover;

[0035] 1000, Connecting column;

[0036] K, jaws;

[0037] P1, First pin;

[0038] P2, second pin;

[0039] P3, the third pin. Detailed Implementation

[0040] The technical solutions in this application will now be clearly and thoroughly described with reference to the accompanying drawings. Specifically, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0041] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0042] Municipal pipelines are an indispensable infrastructure of modern cities. With the accelerating pace of urban construction, the requirements for pipeline maintenance are becoming increasingly stringent. Facilities such as drainage and electricity require regular inspection and repair. However, in actual use and inspection processes, some manhole covers exhibit low opening efficiency, preventing them from being opened quickly.

[0043] The reason for this is that the connection between the manhole cover opening tool and the manhole cover is prone to loosening, which requires replacing the manhole cover with different opening tools, resulting in low opening efficiency and the inability to open the manhole cover quickly.

[0044] Based on the above-mentioned technical problems, this application provides a manhole cover opening tool that can ensure the reliability of the connection between the manhole cover opening tool and the manhole cover, so as to avoid the technical problems of low manhole cover opening efficiency and inability to open the manhole cover quickly due to the loosening of the two.

[0045] Figure 1 The following is a schematic diagram of the structure of the manhole cover opening tool a in some embodiments of this application. Figure 2 It shows Figure 1 A structural diagram from another perspective. Combined with... Figure 1 as well as Figure 2The manhole cover opening tool A provided in this application includes a first clamp body 100, a second clamp body 200, a first connecting rod 300, a second connecting rod 400, and a cable 500. The first clamp body 100 includes a clamp arm 101 and an operating arm 102 arranged sequentially, and the operating arm 102 is provided with a sliding groove 103. The second clamp body 200 is rotatably connected to the first clamp body 100, and the first clamp body 100 and the clamp arm 101 are arranged opposite to each other, forming a clamp jaw K. The first connecting rod 300 is rotatably connected to the second clamp body 200, and the first connecting rod 300 and the operating arm 102 are arranged opposite to each other. The second connecting rod 400 is disposed between the first connecting rod 300 and the operating arm 102, one end of the second connecting rod 400 is slidably disposed in the sliding groove 103, and the other end of the second connecting rod 302 is rotatably connected to the first connecting rod 300. The cable 500 is connected to the first clamp body 100.

[0046] When opening the manhole cover b using the manhole cover opening tool a provided in this application, the second clamp 200 is placed inside the opening of the manhole cover b, and the first connecting rod 300 is placed on the top surface of the manhole cover b, forming... Figure 3 As shown in the diagram; since the second link 400 is located between the first link 300 and the operating arm 102, one end of the second link 400 is slidably disposed in the groove 103, and the other end of the second link 302 is rotatably connected to the first link 300. When the operating arm 102 is pressed, one end of the second link 400 will slide towards the end of the groove 103 away from the clamp arm 101, and through the second link 400, it will drive the first link 300 to move closer to the operating arm 102, thereby driving the second clamp 200 to move closer to the clamp arm 101, so as to narrow the jaw K, until the second clamp 200 and the clamp arm 101 can clamp the well. Press the operating arm 102 again; the second link 400 continues to rotate in the direction of the first link 300. The second link 400 and the first link 300 are in a straight line. Due to the restriction of the end of the slide groove 103 away from the clamp arm 101, the second link 400 cannot continue to rotate. The second link 400 and the first link 300 are locked so that the second clamp body 200 and the clamp arm 101 can reliably clamp the manhole cover b and prevent the second clamp body 200 and the clamp arm 101 from falling off the manhole cover b. Then, the user can pull up the cable 500 to lift the manhole cover b and open it to facilitate subsequent construction.

[0047] For ease of description, we define manhole cover opening tool 'a' as having a vertical direction and a front-back direction, where the vertical direction is the up-down direction shown in the diagram, and the front-back direction is the left-right direction shown in the diagram. The specific details of manhole cover opening tool 'a' will now be further described with reference to the accompanying drawings.

[0048] In some embodiments, the first clamp body 100 and the second clamp body 200 are elongated structures, generally arranged along the front-to-back direction as shown in the figure. The front end of the first clamp body 100 is a clamp arm 101, and the rear end is an operating arm 102. That is, the clamp arm 101 and the operating arm 102 are arranged sequentially along the front-to-back direction. The clamp arm 101 of the second clamp body 200 and the first clamp body 100 are approximately the same size. One end of the operating arm 102 facing the clamp arm 101 (that is, the front end of the operating arm 102) protrudes towards the second clamp body 200 and is inserted into the rear end of the second clamp body 200, and is rotatably connected by a pin.

[0049] In some embodiments, the opposing sides of the clamp arm 101 and the first clamp body 100 are both concave arc-shaped. This configuration is suitable when the opening of the manhole cover b is I-shaped ( Figure 3 As shown), the connecting post 1000 in the middle of the opening of the manhole cover b can better fit the inner wall of the jaw K, so as to more firmly wrap the connecting post, increase the contact area, disperse the pressure, reduce the local stress concentration on the inner wall of the jaw K, thereby increasing the friction between the jaw K and the connecting post 1000, and preventing the connecting post 1000 from sliding or falling off from the jaw K.

[0050] In some embodiments, at least a portion of the opposing sides of the clamp arm 101 and the first clamp body 100 are serrated, thereby enabling the opposing sides of the clamp arm 101 and the first clamp body 100 to engage with the connecting post 1000 to increase friction and prevent slippage.

[0051] In some embodiments, the first connecting rod 300 has a first rod body 301 and a second rod body 302 connected to each other. The first rod body 301 is disposed between the second clamping body 200 and the second rod body 302. The first rod body 301 is rotatably connected to the second clamping body 200. The distance from the second rod body 302 to the operating arm 102 is greater than the distance from the first rod body 301 to the operating arm 102. That is, the distance between the front end of the first connecting rod 300 and the operating arm 102 is less than the distance between the tail end of the first connecting rod 300 and the operating arm 102. With this configuration, when the operating arm 102 moves the first connecting rod 300 closer to the operating arm 102 via the second connecting rod 400, the first connecting rod 300 can have a larger rotation stroke. Correspondingly, the opening degree of the clamping jaws K can also be increased, so that the well cover opening tool a provided in this application can clamp a connecting post with a larger diameter, thereby improving the versatility of the well cover opening tool a.

[0052] In some embodiments, at least a portion of the first link 300 on the side opposite to the operating arm 102 is concave, that is, at least a portion of the bottom of the first link 300 is concave, so that the distance from the second rod 302 to the operating arm 102 is greater than the distance from the first rod 301 to the operating arm 102. In specific implementations, the first rod 301 can be straight, the second rod 302 can be arc-shaped, and the second link 400 is rotatably connected to the junction between the first rod 301 and the second rod 302.

[0053] It should be noted that the inward concavity of the first link 300 on the side facing away from the operating arm 102 shown in this application means that the first link 300 is entirely or partially concave on the side facing away from the operating arm 102. In addition, the shape of the concavity can be arc-shaped or V-shaped, etc., and this application does not limit it.

[0054] In some embodiments, the slide 103 is formed on the side of the operating arm 102 facing the first link 300, that is, the slide 103 is formed at the bottom of the operating arm 102, and the slide 103 has a certain length to accommodate the rotation of the second link 400.

[0055] In some embodiments, the manhole cover opening tool a further includes a first adjusting member 600, which is threadedly connected to the operating arm 102. The first adjusting member 600 extends from the end of the operating arm 102 away from the clamp arm 101 into the slide groove 103. One end of the second connecting rod 400 abuts against the adjusting member, that is, the first adjusting member 600 extends from the rear end of the operating arm 102 into the slide groove 103. With this configuration, by rotating the first adjusting member 600, the second clamp body 200 can be driven to rotate towards or away from the clamp arm 101, thereby adjusting the size of the jaw K formed by the second clamp body 200 and the clamp arm 101 to accommodate connecting posts of different diameters, thus giving the manhole cover opening tool a better versatility.

[0056] In specific implementation, the first adjusting member 600 is a screw, with its front end passing through the rear end of the operating arm 102 into the slide groove 103, and its rear end located outside the rear end of the operating arm 102, so as to facilitate the user to rotate the first adjusting member 600. When the user tightens the first adjusting member 600, the second clamp body 200 rotates towards the clamp arm 101, and the jaw K formed by the second clamp body 200 and the clamp arm 101 shrinks. When the user unscrews the second adjusting member 700, the second clamp body 200 rotates away from the clamp arm 101, and the jaw K formed by the second clamp body 200 and the clamp arm 101 expands.

[0057] In some embodiments, the operating arm 102 has a receiving groove 104 and an adjustment hole 105 at its end facing the clamp arm 101. That is, the receiving groove 104 and the adjustment hole 105 are located at the front end of the operating arm 102. The opening of the receiving groove 104 faces the second clamp body 200 and downwards. The adjustment hole 105 extends from the side of the operating arm 102 away from the second clamp body 200 to the bottom of the receiving groove 104. In other words, the adjustment hole 105 connects the top surface of the operating arm 102 to the receiving groove 104. At least one side of the adjustment hole 105 along the length of the operating arm 102 is provided with a plurality of positioning slots 106 at intervals at the bottom of the groove. The end of the clamp arm 101 facing the operating arm 102 is located in the receiving groove 104 and is rotatably connected to the operating arm 102. The well cover opening tool a also includes a second adjusting member 700, one end of which is connected to the clamp arm 101, and the other end of which moves through the adjustment hole 105 and can be moved to switch to one of the positioning slots 106. With this configuration, the second adjusting member 700 can be operated to rotate the clamp arm 101 toward or away from the second clamp body 200.

[0058] In specific implementation, the operating arm 102 is a U-shaped structure with its opening facing downward, formed by sheet metal. The tail end of the operating arm 102 is tightly fitted and has a threaded hole for the first adjusting member 600 to pass through. The receiving groove 104 and the sliding groove 103 are connected sequentially from front to back. An adjusting hole 105 is opened at the top of the front end of the operating arm 102 (the top plate of the U-shaped structure). The adjusting hole 105 is square, and multiple positioning grooves 106 are opened on one side wall along the length direction of the adjusting hole 105. The rear end clearance of the clamp arm 101 is set in the receiving groove 104. The second adjusting member 700 is a rod-shaped structure, and its bottom end can be connected to the rear end of the clamp arm 101 by integral molding, threaded connection or welding. Its top end passes through the adjusting hole 105.

[0059] Figure 4 This diagram shows the structure of the manhole cover opening tool a in its first state. Figure 5 A schematic diagram of the manhole cover opening tool 'a' in its second state is shown. (Combined with...) Figure 4 The user moves the second adjusting member 700 towards the rear end of the operating arm 102. The second adjusting member 700 causes the clamp arm 101 to rotate away from the second clamp body 200, thereby widening the jaws K formed by the second clamp body 200 and the clamp arm 101 to form... Figure 4 The first state described above. Combined with... Figure 5 The user moves the second adjusting member 700 towards the front end of the operating arm 102. The second adjusting member 700 drives the clamp arm 101 to rotate towards the second clamp body 200, thereby narrowing the jaw K formed by the second clamp body 200 and the clamp arm 101 to form... Figure 5The second state shown; after the jaw K size is adjusted to the correct position, the user operates the second adjusting member 700 to position the second adjusting member 700 in a certain positioning groove 106, so that the clamp arm 101 is fixed relative to the operating arm 102 to maintain the size of the jaw K formed by the second clamp body 200 and the clamp arm 101.

[0060] In some embodiments, the other end of the second adjusting member 700 is connected to a gripping member 701, which is located on the side of the operating arm 102 facing away from the second clamping body 200. The gripping member 701 may be spherical, and is held by the user to move the second adjusting member 700.

[0061] This application, through the setting of the first adjusting member 600 and the second adjusting member 700, can adjust the size of the jaw K formed by the second clamp body 200 and the clamp arm 101 to adapt to the clamping of connecting columns of different diameters, and has good versatility and practicality.

[0062] In some embodiments, the manhole cover opening tool a further includes an elastic element 800, which connects the operating arm 102 and the second clamping body 200. In the initial state, the tension of the elastic element 800 maintains a distance between the operating arm 102 and the first connecting rod 300, keeping the jaws K at a certain opening. When a force is applied to the operating arm 102, and the second connecting rod 400 moves the first connecting rod 300 closer to the operating arm 102, the elastic element 800 is compressed. When the force applied to the operating arm 102 is released, the restoring force of the elastic element 800 drives the operating arm 102 and the second clamping body 200 back to their initial positions, achieving automatic opening of the jaws K. In other words, the elastic element 800 enables the jaws K to automatically reset, reducing the tedium of manual operation. Furthermore, the elastic element 800, through pre-tightening force, ensures that the jaws K maintain a uniform biting force when closed, preventing items from slipping or the jaws K from shifting due to uneven force, thus improving operational convenience.

[0063] In some embodiments, the second clamp body 200 has a first connecting portion 201 and a second connecting portion 202 at the end opposite to the jaw K (the rear end of the second clamp body 200). The first connecting portion 201 protrudes towards the first clamp body 100, that is, it protrudes into the jaw K. The first connecting portion 201 is rotatably connected to the operating arm 102 of the first clamp body 100. The second connecting portion 202 protrudes away from the first clamp body 100 and is rotatably connected to the first connecting rod 300. The second clamp body 200 has a connecting hole 203 for connecting the elastic element 800. The connecting hole 203 is located between the first connecting portion 201 and the second connecting portion 202. This arrangement allows the manhole cover opening tool a to be compactly arranged, reducing the space occupied.

[0064] In some embodiments, the bottom of the groove 103 of the operating arm 102 is provided with a connecting protrusion 107, the elastic element 800 is a spring, one end of the elastic element 800 is hung on the protrusion, and the other end of the elastic element 800 is hung in the connecting hole 203 opened in the second clamp body 200, so that the assembly of the elastic element 800 can be realized.

[0065] Combination Figure 4 as well as Figure 5 In the manhole cover opening tool a provided in this application, the first clamp body 100, the first connecting rod 300, the second connecting rod 400, and the operating arm 102 form a four-bar linkage mechanism. The driving arm 102 of the first clamp body 100 and the first connecting part 201 of the second clamp body 200 are rotatably connected by the first pin P1, which forms the first lever fulcrum. The second connecting part 202 of the second clamp body 200 and the front end of the first connecting rod 300 are rotatably connected by the second pin P2, which forms the second lever fulcrum. This allows the user to use the lever principle on both sides to hold the operating arm 102 with a smaller force, thereby closing and locking the jaws K.

[0066] Combination Figure 4 as well as Figure 5 The rear end of the first clamp body 100 is rotatably connected to the front end of the drive arm 102 via the third pin P3. The first pin P1 is located between the third pin P3 and the second pin P2, and the connecting hole 203 is located between the first pin P1 and the second pin P2 to prevent the movement of the various parts of the well cover opening tool a from interfering with each other.

[0067] In some embodiments, a hanging ring 107 is provided on the side of the operating arm 102 facing away from the first connecting rod 300 (the top of the operating arm 102), and a pull cable 500 is connected to the hanging ring 107. When the manhole cover opening tool a is not in use, the pull cable 500 can be wound around at least one of the first clamp body 100 and the second clamp body 200, facilitating the storage and transportation of the manhole cover opening tool a. In one embodiment, the pull cable 500 is detachably connected to the hanging ring 107, that is, the pull cable 500 and the other parts of the manhole cover opening tool a are separate structures. When not in use, the pull cable 500 and the other parts of the manhole cover opening tool a can be stored and transported separately. When in use, the pull cable 500 is connected to the hanging ring 107. This arrangement can further improve the storage and transportation of the manhole cover opening tool a. In another embodiment, the pull cable 500 is always connected to the hanging ring 107, that is, the manhole cover opening tool a is transported as a whole storage box, improving the convenience of operation.

[0068] Furthermore, the length of the 500 cable is roughly the same as the height of a human waist, so that users can operate the pull ring in an ergonomic posture as much as possible, improving user comfort.

[0069] In some embodiments, the manhole cover opening tool a further includes a gripping rod 900 connected to a cable 500. This configuration allows the user to grip the gripping rod 900 and apply force to the cable 500 and the operating arm 102, improving ease of operation.

[0070] When using the manhole cover opening tool a provided in this application, first place the manhole cover opening tool a so that the connecting post 1000 of the I-shaped opening of the manhole cover b is located in the jaws K of the manhole cover opening tool a, and the first connecting rod 300 is placed on the surface of the manhole cover b in a roughly horizontal direction.

[0071] The user then presses the operating arm 102, causing the jaws K formed by the clamping arms 101 and the second arm to bite the connecting post 1000 of the I-beam opening of the manhole cover b, and locking the first connecting rod 300 and the second connecting rod 400. In one embodiment, before pressing the operating arm 102, one end of the second connecting rod 400 is a certain distance from the rear end of the slide groove 103 (the front end of the first adjusting member 600). During the user's pressing of the operating arm 102, one end of the first connecting rod 400 moves towards the rear end of the slide groove 103 until one end of the second connecting rod 400 abuts against the front end of the first adjusting member 600, and the pressing operation continues. Arm 102, the second link 400 can rotate around the front end of the first adjusting member 600, the jaw K shrinks to fit with the connecting post 1000; continue pressing the operating arm 102, the second link 400 can rotate slightly around the front end of the first adjusting member 600 until the second link 400 can no longer rotate, at this time, the first link 300 and the second link 400 are in a locked state; in another embodiment, before pressing the operating arm 102, one end of the second link 400 abuts against the rear end of the slide groove 103 (the front end of the first adjusting member 600), the subsequent operation process is the same as the above embodiment, and will not be described in detail here.

[0072] The user operates the first adjusting component 600 and the second adjusting component 700 to fine-tune the size of the jaws K, ensuring that the jaws K are perfectly aligned with the connecting post of the I-beam.

[0073] When the user pulls the grip rod 900, the cable 500 straightens under the force and generates an upward pull. Through the transmission of force, the entire manhole cover b is lifted, thus completing the opening of manhole cover b.

[0074] It should be noted that this application is applicable not only to manhole covers b with an H-shaped opening, but also to manhole covers b with a square opening. During operation, it is only necessary to insert the second clamp 200 into the bottom surface of the manhole cover b through the square opening. This application does not impose any restrictions on this.

[0075] In summary, the manhole cover opening tool a provided in this application can reliably clamp the manhole cover b by pressing the operating arm 102, thereby avoiding the phenomenon of the manhole cover b being affected by the second clamp body 200 and clamp arm 101 loosening from the manhole cover b. In addition, by operating the first adjusting member 600 and the second condition member, the size of the jaw K can be finely adjusted so that the jaw K is adapted to the part to be engaged, thereby further avoiding the phenomenon of the manhole cover b being affected by the second clamp body 200 and clamp arm 101 loosening from the manhole cover b, and improving the operating efficiency of the manhole cover b.

[0076] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0077] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0078] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0079] In the description of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0080] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0081] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0082] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A manhole cover opening tool, characterized in that, The manhole cover opening tool includes: The first clamp body includes clamp arms and operating arms arranged in sequence, and the operating arm is provided with a sliding groove; The second clamp body is rotatably connected to the first clamp body. The first clamp body and the clamp arm are arranged opposite to each other, and the first clamp body and the clamp arm form a jaw. The first link is rotatably connected to the second clamp body, and the first link and the operating arm are arranged opposite to each other; The second link is disposed between the first link and the operating arm. One end of the second link is slidably disposed in the slide groove, and the other end of the second link is rotatably connected to the first link. A cable connects to the first clamp body.

2. The manhole cover opening tool according to claim 1, characterized in that, The opposing sides of the clamp arms and the first clamp body are both concave arc shapes.

3. The manhole cover opening tool according to claim 1, characterized in that, At least a portion of the opposing sides of the clamp arm and the first clamp body are serrated.

4. The manhole cover opening tool according to claim 1, characterized in that, The first link has a first rod body and a second rod body connected to each other. The first rod body is disposed between the second clamp body and the second rod body. The first link is rotatably connected to the second clamp body. The distance from the second rod body to the operating arm is greater than the distance from the first rod body to the operating arm.

5. The manhole cover opening tool according to claim 4, characterized in that, At least a portion of the first link is recessed on the side opposite to the operating arm.

6. The manhole cover opening tool according to any one of claims 1-5, characterized in that, The manhole cover opening tool also includes: A first adjusting member is threadedly connected to the operating arm. The first adjusting member extends from the end of the operating arm away from the clamp arm into the slide groove, and one end of the second connecting rod abuts against the adjusting member.

7. The manhole cover opening tool according to any one of claims 1-5, characterized in that, The operating arm has a receiving groove and an adjustment hole at the end facing the clamp arm. The opening of the receiving groove faces the second clamp body. The adjustment hole extends from the side of the operating arm away from the second clamp body to the bottom of the receiving groove. The adjustment hole has a plurality of positioning grooves spaced apart on at least one side along the length direction of the operating arm. The end of the clamp arm facing the operating arm is located in the receiving groove and is rotatably connected to the operating arm; The manhole cover opening tool also includes a second adjusting component, one end of which is connected to the clamp arm, and the other end of which moves through the adjusting hole and can be switched to one of the positioning slots.

8. The manhole cover opening tool according to claim 7, characterized in that, The other end of the second adjustment member is connected to a gripping member, which protrudes from the side of the operating arm facing away from the second clamp body.

9. The manhole cover opening tool according to any one of claims 1-5, characterized in that, The manhole cover opening tool also includes: An elastic element connects the operating arm and the second clamp body.

10. The manhole cover opening tool according to any one of claims 1-5, characterized in that, The opening tool also includes a grip lever connected to the cable.

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