Lifting appliance for rapidly lifting piston and using method of lifting appliance

Abstract

The invention provides a lifting appliance for rapidly lifting a piston and a using method thereof, and belongs to the technical field of lifting. Comprising a base body, a vertically-through mounting inner cavity is formed in the base body, a plurality of supporting blocks are evenly distributed on the periphery of the lower end of the base body, the supporting blocks are movably connected with the base body, a top column is vertically arranged in the mounting inner cavity of the base body in a penetrating mode, and a cone structure larger than the radial size of the mounting inner cavity is arranged at the lower end of the top column. The lower end of the base body, the supporting block in the natural drooping state and the cone structure at the lower end of the jacking column can penetrate through a piston pin hole C of the piston in a clearance mode, and when the cone structure is driven by the jacking column to move upwards, the supporting block is opened to make contact with the inner wall face of the piston pin hole C of the piston. A safety locking structure enabling the cone structure to continuously keep the supporting block open is arranged on the upper portion of the top column. According to the invention, the collision and scratch risks in the piston hoisting process are reduced, the hoisting potential safety hazard is avoided, rapid positioning and safe and efficient hoisting are realized, and the transfer and processing quality is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of lifting, and in particular relates to a lifting device for rapid lifting of a piston and a use method thereof. Background Art

[0002] In the structure of the internal combustion engine, the piston plays a vital role. Its material is mostly forged aluminum with low hardness. During the processing, lifting and transfer process, special attention should be paid to prevent bumps, achieve fast and efficient lifting, and avoid affecting the processing quality. Therefore, the requirements for piston lifting methods and lifting equipment are very high. The lifting method currently used by most factories is to pass the lifting rope through the piston pin hole, fix the lifting rope with a hook, and lift the piston in a horizontal direction. See the lifting diagram Figure 8 and Fig. 9 .

[0003] In the above-mentioned lifting method, the lifting is performed by passing the lifting rope 10 through the piston pin hole and fixing it with the lifting hook 11. This lifting method mainly has the following problems: First, the piston is mostly forged aluminum or cast iron parts, and the outer and inner edges of the piston pin hole are sharp after processing. It is easy to cut the arm when manually passing the lifting rope through the pin hole, which poses a safety hazard; second, because the top wall thickness of the piston is thicker and the bottom wall thickness is thinner, its center of gravity is above the pin hole. This lifting method that puts the piston in a horizontal state causes it to swing left and right and up and down during the lifting process due to the unstable center of gravity, which increases the difficulty and risk of lifting; third, the piston pin hole is a key part of the core parts, and the processing surface quality requirements are extremely high. When the lifting rope is used to pass through the piston pin hole for lifting, the contact part between the lifting rope and the piston pin hole may be scratched due to back and forth friction, affecting the processing quality.

[0004] Based on the above reasons, improvements need to be proposed. Summary of the invention

[0005] The technical problem solved by the present invention is: to provide a lifting device for rapid lifting of a piston and a method of using the same. The present invention aims to reduce the risk of bumps and scratches during the lifting of the piston, avoid safety hazards during lifting, achieve rapid positioning and safe and efficient lifting, and improve the quality of transportation and processing.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A lifting device for rapid lifting of a piston comprises a base body, wherein an installation inner cavity which passes through from top to bottom is provided inside the base body, a plurality of support blocks are evenly distributed around the lower end of the base body, the support blocks are movably connected to the base body, a top column is provided which passes through the installation inner cavity of the base body from top to bottom, a conical structure which is larger than the radial dimension of the installation inner cavity is provided at the lower end of the top column, the lower end of the base body, the support block in a naturally drooping state, and the conical structure at the lower end of the top column can all pass through the gap in the piston pin hole C of the piston, and when the conical structure moves upward driven by the top column, the support block is opened to contact the inner wall surface of the piston pin hole C of the piston, and a safety locking structure which enables the conical structure to continuously keep the support block opened is provided at the upper part of the top column.

[0008] As a further limitation of the above solution, the lower end of the base is evenly provided with mounting grooves, the mounting grooves are provided with fixing pins, and the upper end of the support block is supported on the fixing pins through a bearing.

[0009] To further define the above scheme, the outer surface of the cone structure of the top column that is used to contact the support block is a conical surface, and the surface of the support block that is in contact with the cone structure is an inclined surface; the surface of the support block that is used to contact the inner wall surface of the piston pin hole C of the piston is an arc surface.

[0010] To further define the above scheme, the safety locking structure includes a connecting block, which is fixedly connected to the upper end of the top column, and the upper end surface of the base is located at the upper end of the installation cavity and is surrounded by a safety lock groove X and a safety lock groove Y. The safety lock groove X and the safety lock groove Y are perpendicular to each other, and there is a height difference between the bottom surfaces of the safety lock groove X and the safety lock groove Y, wherein the bottom surface of the safety lock groove X is lower than the bottom surface of the safety lock groove Y.

[0011] As a further limitation of the above scheme, a lifting ring I is provided on the upper part of the connecting block, and a lifting ring II is provided on the upper end surface of the base.

[0012] As a further limitation of the above solution, a radial limiting protrusion for limiting the falling depth of the lifting device is provided on the outer surface of the base.

[0013] A method for using a lifting device for rapid lifting of a piston, comprising the following steps:

[0014] Step 1): Use a hook to connect the sling, and before the sling contacts the piston, the support block is in a natural drooping position;

[0015] Step 2): The whole lifting device starts to fall along the axis direction of the piston pin hole C of the piston. When the lower end surface of the radial limiting protrusion of the base body contacts the upper end surface of the piston, the support block has completely entered the piston pin hole C. At this time, the positioning is completed and the falling stops;

[0016] Step 3): Pull the ejector column to move upward along the axis direction of the piston pin hole C. During the movement, the cone structure at the lower end of the ejector column pushes the multiple support blocks to expand outwards around one circle, and then is fixedly snapped into the safety lock groove Y through the connection block to achieve locking of the expanded state position;

[0017] Step 4): Pull the lifting device upwards. At this time, the lifting device as a whole will move upwards, and the outer side of the support block will contact the inner cavity of the piston pin hole C. As the lifting device continues to be pulled upwards, the piston will be lifted;

[0018] Step 5): After the piston is hoisted to the designated location, the sling is lowered and fixedly engaged in the safety lock slot X by the connecting block to release the position lock. The top column is axially lowered to release the support for the support block. The support block is moved toward the center axis of the sling and separated from the inner cavity of the piston. The support block is in a natural drooping state. Then the hook is lifted to make the sling move upward as a whole and separate from the piston.

[0019] The advantages of the present invention compared with the prior art are:

[0020] 1. Compared with the traditional lifting method, this solution is compact, convenient and easy to operate. It can realize the rapid positioning of the piston and the lifting device, achieve safe and efficient lifting, and greatly improve the quality of transportation and processing;

[0021] 2. The lifting device provided by this solution does not require the lifting personnel to contact the piston during the lifting process, reducing the risk of bumps and scratches. The safety lock slot is set to avoid safety accidents and eliminate safety hazards during lifting;

[0022] 3. This solution has high promotion value. It can solve the lifting problem of different types of parts by designing this type of structural hoist with different sizes. It has a simple structure and a wide range of applications.

[0023] 4. This solution is easy to operate, simple and reliable in positioning, easy to process, and improves lifting efficiency and processing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A structural front view of a lifting device for rapid lifting of a piston provided by the present invention;

[0025] Figure 2 A top view of the structure of a lifting device for rapid lifting of a piston provided by the present invention;

[0026] Figure 3 For the present invention Figure 2 The structural cross-sectional view shown in the AA direction;

[0027] Figure 4 A schematic diagram of the three-dimensional structure of a lifting device for rapid lifting of a piston provided by the present invention;

[0028] Figure 5A schematic diagram of the use process of a piston rapid lifting lifting device provided by the present invention Figure 1 ;

[0029] Figure 6 A schematic diagram of the use process of a piston rapid lifting lifting device provided by the present invention Figure 2 ;

[0030] Figure 7 A schematic diagram of the use process of a piston rapid lifting lifting device provided by the present invention Figure 3 ;

[0031] Figure 8 It is a main view schematic diagram of the existing lifting method;

[0032] Fig. 9 It is a side view schematic diagram of the existing lifting method. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “upper”, “lower”, “top”, “bottom”, “inside” and “outside” are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0035] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0036] See also Figure 1-9 , details of the embodiments of the present invention.

[0037] Embodiment 1: A lifting device for quick lifting of a piston, see Figure 1-4As shown, it includes a base 1, wherein a cylindrical mounting inner cavity 1-1 which passes through from top to bottom is provided inside the base 1, three support blocks 4 are evenly distributed around the lower end of the base 1, and the support blocks 4 are movably connected to the base 1, and a top column 5 is provided through the mounting inner cavity 1-1 of the base 1 from top to bottom, and a conical structure 5-1 which is larger than the radial dimension of the mounting inner cavity 1-1 is provided at the lower end of the top column 5, and the lower end of the base 1, the support block 4 in a naturally drooping state, and the conical structure 5-1 at the lower end of the top column 5 can all pass through the gap in the piston pin hole C9-1 of the piston 9, and when the conical structure 5-1 moves upward driven by the top column 5, the support block 4 is propped open so that it can contact the inner wall surface of the piston pin hole C9-1 of the piston 9, and a safety locking structure is provided on the upper part of the top column 5 so that the conical structure 5-1 can continuously support the support block 4 to prop it open.

[0038] In a specific embodiment, the lower end of the base 1 is evenly provided with mounting grooves 1-5, and a fixing pin 2 is provided in the mounting groove 1-5. The upper end of the support block 4 is supported on the fixing pin 2 through a bearing 3, and the support block can be rotated toward the outside of the base for support with the center of the bearing.

[0039] In a specific embodiment, the outer surface of the cone structure 5-1 of the top column 5 for contacting the support block 4 is a conical surface, and the diameter of the cone surface at the maximum outer diameter cannot be greater than the radial dimension of the lower end of the base 1, so as to ensure that the components at the lower part of the sling can smoothly enter the piston pin hole C. The surface of the support block 4 that contacts the cone structure 5-1 is an inclined surface 4-1; the surface of the support block 4 that contacts the inner wall surface of the piston pin hole C of the piston 9 is an arc surface 4-2.

[0040] In a specific embodiment, the safety locking structure includes a connection block 6, which is fixedly connected to the upper end of the top column 5 by a thread, and can move up and down along the vertical direction in the installation inner cavity 1-1 of the base 1. The upper end surface of the base 1 is located at the upper end of the installation inner cavity 1-1 and is provided with a safety lock groove X1-2 and a safety lock groove Y1-3. The directions of the safety lock groove X1-2 and the safety lock groove Y1-3 are perpendicular, and there is a height difference between the bottom surfaces of the safety lock groove X1-2 and the safety lock groove Y1-3, wherein the bottom surface of the safety lock groove X1-2 is lower than the bottom surface of the safety lock groove Y1-3, which is used to lock the top column 5 at different height positions, thereby changing the height state of the cone structure 5-1 by the height of the top column 5, and realizing the support block 4 being opened or made to droop freely.

[0041] In a specific embodiment, the upper part of the connecting block 6 is provided with a lifting ring I7 through a threaded connection, and the lifting ring I7 is used to pull the top column and the connecting block to move up and down along the vertical direction inside the base. The upper end surface of the base 1 is provided with a lifting ring II8 through a threaded connection, and the lifting ring II8 is used to connect with a hook for lifting.

[0042] In a specific embodiment, radial limiting protrusions 1-4 for limiting the falling depth of the lifting device are provided on the outer surface of the base 1.

[0043] Embodiment 2: A method for using a lifting device for rapid lifting of a piston, comprising the following steps:

[0044] Step 1): Use a hook to connect the sling. Before the sling contacts the piston, the support block 4 is in a naturally drooping position due to gravity; at this time, the connecting block 6 is sunk into the safety lock groove X1-2. Figure 5 shown.

[0045] Step 2): The whole lifting device starts to fall along the axis direction of the piston pin hole C of the piston 9, and the cylindrical surface D of the base 1 is matched with the piston pin hole C with a large gap. When the support block 4 completely enters the piston pin hole C and the E surface of the limiting protrusion 1-4 of the base 1 contacts the F surface of the piston, the lifting device stops falling;

[0046] Step 3): Figure 6 As shown, the top column 5 and the connecting block 6 are pulled by the lifting ring Ⅰ7 to move upward along the axis direction of the piston pin hole C 9-1. During the movement, the outer cone surface of the cone structure 5-1 at the lower end of the top column 5 contacts the inclined surfaces 4-1 of the three support blocks 4, so that the three support blocks 4 are expanded outward along the central axis direction of the bearing 3 until the lower end surface of the connecting block 6 exceeds the upper top surface of the base 1. At this time, there is still a little gap between the outer side surfaces of the three support blocks 4 and the inner cavity of the piston pin hole C 9-1, and they are not in contact. Then the connecting block 6 is rotated 90 degrees along the central axis of the top column 5, and then it is slightly sunk so that the connecting block 6 is stuck in the safety lock groove Y1-3. The connecting block 6 is locked in the safety lock groove Y1-3, and the top column 5 is fixed in the base 1. At this time, there is a small gap between the outer cone surface of the cone structure 5-1 at the lower end of the top column 5 and the inclined surface 4-1 of the support block 4.

[0047] Step 4): Connect the lifting ring II 8 of the lifting device to the lifting hook, and start to pull the lifting device upward. At this time, the lifting device as a whole will move upward, and the support block 4 will be retracted to the inside after contacting the inner cavity of the piston pin hole C 9-1. When it contacts the outer cone surface of the cone structure 5-1 of the top column 5, the position is locked and the piston is fixed. Figure 7 Continue to pull the lifting device upwards to lift the piston as shown.

[0048] Step 5): After lifting the piston 9 to the designated location, lower the hook and the sling descends. Due to the lack of support, the support block 4 will move toward the center of the top column 5 and separate from the inner cavity of the piston. At this time, pull the connecting block 6 upward to make it leave the safety lock groove Y1-3. When the lower end surface of the connecting block 6 is higher than the upper end surface of the base 1, rotate it 90 degrees and push the connecting block 6 downward again to allow the top column 5 to continue to descend, so that the three support blocks 4 are moved inwardly along the center direction of the bearing. When the connecting block 6 is stuck in the safety lock groove X1-2, the three support blocks 4 are in a natural drooping position. Then lift the hook to make the sling move upward and separate from the piston, and continue to lift the next piston.

[0049] Compared with the traditional lifting method, the present invention is compact, convenient and easy to operate. It can realize rapid positioning of the piston and the lifting device, realize safe and efficient lifting, and greatly improve the transportation and processing quality. During the lifting process, the lifting personnel do not need to contact the piston, reducing the risk of bumps and scratches. By setting a safety lock groove, safety accidents can be avoided and lifting safety hazards can be eliminated. The lifting problems of different types of parts can be solved by designing this type of structural lifting devices of different sizes. The structure is simple and the application range is wide. It is easy to use and operate, the positioning is simple and reliable, and the processing is convenient, which improves the lifting efficiency and processing quality.

[0050] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0051] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A lifting device for rapid lifting of a piston, characterized in that: The invention comprises a base body (1), wherein the base body (1) is provided with an installation inner cavity (1-1) which is connected vertically, and a plurality of support blocks (4) are evenly distributed around the lower end of the base body (1), and the support blocks (4) are movably connected to the base body (1), and a top column (5) is provided vertically through the installation inner cavity (1-1) of the base body (1), and the lower end of the top column (5) is provided with a cone structure (5-1) which is larger than the radial size of the installation inner cavity (1-1), and the lower end of the base body (1), The support block (4) in a naturally drooping state and the conical structure (5-1) at the lower end of the top column (5) can pass through the gap in the piston pin hole C (9-1) of the piston (9); when the conical structure (5-1) moves upward driven by the top column (5), the support block (4) is opened to contact the inner wall surface of the piston pin hole C (9-1) of the piston (9); and a safety locking structure is provided on the upper part of the top column (5) to enable the conical structure (5-1) to continuously keep the support block (4) opened.

2. A lifting device for rapid lifting of a piston according to claim 1, characterized in that: The lower end of the base (1) is evenly provided with mounting grooves (1-5), a fixing pin (2) is provided in the mounting groove (1-5), and the upper end of the support block (4) is supported on the fixing pin (2) through a bearing (3).

3. A lifting device for rapid lifting of a piston according to claim 1, characterized in that: The outer surface of the cone structure (5-1) of the top column (5) that is used for contacting the support block (4) is a conical surface, and the surface of the support block (4) that is in contact with the cone structure (5-1) is an inclined surface (4-1); and the surface of the support block (4) that is used for contacting the inner wall surface of the piston pin hole C (9-1) of the piston (9) is an arc surface (4-2).

4. A lifting device for rapid lifting of a piston according to claim 1, characterized in that: The safety locking structure comprises a connecting block (6), wherein the connecting block (6) is fixedly connected to the upper end of the top column (5); the upper end surface of the base body (1) is located at the upper end of the mounting inner cavity (1-1), and a safety lock groove X (1-2) and a safety lock groove Y (1-3) are arranged around the upper end; the safety lock groove X (1-2) and the safety lock groove Y (1-3) are perpendicular to each other; there is a height difference between the bottom surfaces of the safety lock groove X (1-2) and the safety lock groove Y (1-3), wherein the bottom surface of the safety lock groove X (1-2) is lower than the bottom surface of the safety lock groove Y (1-3).

5. A lifting device for rapid lifting of a piston according to claim 4, characterized in that: A lifting ring I (7) is provided on the upper part of the connecting block (6), and a lifting ring II (8) is provided on the upper end surface of the base body (1).

6. A lifting device for rapid lifting of a piston according to claim 1, characterized in that: The outer surface of the base (1) is provided with radial limiting protrusions (1-4) for limiting the falling depth of the sling.

7. A method for using a lifting device for rapid lifting of a piston, characterized in that: The following steps are involved: Step 1): Use a hook to connect the sling, and before the sling contacts the piston, the support block (4) is in a naturally drooping position; Step 2): the whole lifting device is made to fall along the axial direction of the piston pin hole C (9-1) of the piston (9). When the lower end surface of the radial limiting protrusion (1-4) of the base body (1) contacts the upper end surface of the piston (9), the support block (4) has completely entered the piston pin hole C (9-1). At this time, the positioning is completed and the falling stops. Step 3): Pull the top column (5) to move upward along the axis of the piston pin hole C (9-1). During the movement, the cone structure (5-1) at the lower end of the top column (5) pushes the multiple support blocks (4) to expand outwards, and then is fixedly snapped into the safety lock groove Y (1-3) through the connecting block (6) to achieve the expanded state position locking; Step 4): Pull the lifting device upward, the lifting device moves upward as a whole, the outer side surface of the support block (4) contacts the inner cavity of the piston pin hole C (9-1), and as the lifting device continues to be pulled upward, the piston (9) is lifted; Step 5): After the piston (9) is hoisted to the designated location, the sling is lowered and the position lock is released by engaging the connecting block (6) in the safety lock groove X (1-2). The top column (5) is axially lowered to release the support for the support block (4). The support block (4) is moved toward the central axis of the sling and separated from the inner cavity of the piston (9). The support block (4) is in a naturally drooping state. Then, the hook is lifted to make the sling move upward as a whole and separate from the piston.

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