Lifting appliance for rapidly lifting piston

Abstract

The utility model provides a lifting appliance for rapidly lifting a piston, 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 utility model, 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 utility model belongs to the technical field of hoisting, and in particular relates to a hoisting device for rapid hoisting of a piston. Background Art

[0002] In the structure of internal combustion engines, 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 collisions, 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. The lifting diagram is shown in Figure 8 and Figure 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 hook 11. This lifting method mainly has the following problems: First, the piston is mostly made of forged aluminum or cast iron. 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, since 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 component and has extremely high requirements for the processing surface quality. When using the lifting rope 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 are needed. Utility Model Content

[0005] The technical problem solved by the utility model is to provide a lifting device for rapid lifting of pistons. The purpose of the utility model is to reduce the risk of bumps and scratches during the lifting of the pistons, 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-mentioned purpose, the technical solution adopted by this utility model is:

[0007] The lifting device for rapid lifting of a piston comprises a base body, wherein an installation inner cavity which passes through the base body from top to bottom is provided inside the base body, a plurality of support blocks are evenly distributed around the lower end portion 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 portion 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 stretched open to contact the inner wall surface of the piston pin hole C of the piston.

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

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

[0010] A further limitation of the above scheme is that a safety locking structure is provided on the upper part of the top column to enable the conical structure to continuously keep the support block open; 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 provided with 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 solution, a lifting ring I is provided on the upper portion 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] The advantages of this utility model compared with the prior art are:

[0014] 1. Compared with the traditional lifting method, this solution has a small, convenient and easy-to-operate lifting device, which can realize the rapid positioning of the piston and the lifting device, achieve safe and efficient lifting, and greatly improve the transportation and processing quality;

[0015] 2. The lifting device provided by this solution does not require the lifting personnel to come into contact with the piston during the lifting process, reducing the risk of bumps and scratches. The safety lock slot is also provided to avoid safety accidents and eliminate lifting safety hazards.

[0016] 3. This solution has high promotion value. It can solve the lifting problem of different types of parts by designing this type of structural slings of different sizes. It has a simple structure and a wide range of applications.

[0017] 4. This solution is easy to use and operate, has simple and reliable positioning, and is easy to process, which improves lifting efficiency and processing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural front view of a lifting device for rapid lifting of a piston provided by the utility model;

[0019] Figure 2 A top view of the structure of a lifting device for rapid lifting of a piston provided by the utility model;

[0020] Figure 3 For this utility model Figure 2 The structural cross-sectional view shown in the AA direction;

[0021] Figure 4 A schematic diagram of the three-dimensional structure of a lifting device for rapid lifting of a piston provided by the utility model;

[0022] Figure 5 A schematic diagram of the use of a piston rapid lifting sling provided by the utility model Figure 1 ;

[0023] Figure 6 A schematic diagram of the use of a piston rapid lifting sling provided by the utility model Figure 2 ;

[0024] Figure 7 A schematic diagram of the use of a piston rapid lifting sling provided by the utility model Figure 3 ;

[0025] Figure 8 It is a main view schematic diagram of the existing lifting method;

[0026] Figure 9 It is a side view schematic diagram of the existing lifting method. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, 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, they should not be understood as limitations on the present invention.

[0029] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0030] See also Figure 1-9 , describe in detail the embodiments of the present utility model.

[0031] Example 1: Lifting device for quick lifting of piston, see Figure 1-4 As shown, it includes a base 1, wherein the base 1 is provided with a cylindrical mounting cavity 1-1 which passes through from top to bottom, and 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 cavity 1-1 of the base 1 from top to bottom, and the lower end of the top column 5 is provided with a conical structure 5-1 which is larger than the radial size of the mounting cavity 1-1, and the lower end of the base 1, the support block 4 in the natural 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, it will open the support block 4 so that it can contact the inner wall surface of the piston pin hole C9-1 of the piston 9, and the upper part of the top column 5 is provided with a safety locking structure which enables the conical structure 5-1 to continuously support the support block 4 to open it.

[0032] In a specific embodiment, the lower end of the base 1 is evenly provided with mounting grooves 1-5, and the mounting grooves 1-5 are provided with fixing pins 2. 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 with the center of the bearing for support.

[0033] In one specific embodiment, the outer surface of the cone structure 5-1 of the top column 5 that contacts the support block 4 is a conical surface. The diameter of the cone at its maximum outer diameter cannot be larger than the radial dimension of the lower end of the base 1, ensuring that the various components of the lower portion 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 of the piston pin hole C of the piston 9 is an arc surface 4-2.

[0034] In a specific embodiment, the safety locking structure includes a connecting 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 within the installation cavity 1-1 of the base 1. The upper end surface of the base 1 is located at the upper end of the installation cavity 1-1 and is provided with a safety lock groove X1-2 and a safety lock groove Y1-3. The safety lock groove X1-2 and the safety lock groove Y1-3 are perpendicular to each other, 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. This is used to lock the top column 5 at different heights, thereby changing the height state of the cone structure 5-1 according to the height of the top column 5, thereby achieving the expansion of the support block 4 or allowing it to droop freely.

[0035] In a specific embodiment, a lifting ring I 7 is provided on the upper portion of the connecting block 6 via a threaded connection. The lifting ring I 7 is used to pull the top column and the connecting block up and down vertically within the base. A lifting ring II 8 is provided on the upper end surface of the base 1 via a threaded connection. The lifting ring II 8 is used to connect to a hook for lifting.

[0036] 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.

[0037] Example 2: A method for using the lifting device for rapid piston lifting comprises the following steps:

[0038] Step 1): Use the 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.

[0039] Step 2): The entire sling begins to fall along the axis of the piston pin hole C of the piston 9, with the cylindrical surface D of the base 1 and the piston pin hole C having a large clearance fit. The sling stops falling when the support block 4 is completely inserted into the piston pin hole C and the surface E of the limiting protrusions 1-4 of the base 1 contacts the surface F of the piston.

[0040] Step 3): If Figure 6As shown, the lifting column 5 and the connecting block 6 are pulled upward along the axis of the piston pin hole C9-1 by the lifting ring Ⅰ7. During the movement, the outer cone surface of the cone structure 5-1 at the lower end of the lifting column 5 contacts the inclined surface 4-1 of the three support blocks 4, so that the three support blocks 4 are expanded outward along the central axis 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 C9-1, and they are not in contact. Then the connecting block 6 is rotated 90 degrees along the central axis of the lifting column 5, and then 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 lifting 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 lifting column 5 and the inclined surface 4-1 of the support block 4.

[0041] Step 4): Connect the lifting ring II 8 of the sling to the hook and start to pull the sling upwards. The sling will move upwards as a whole. The support block 4 will contact the inner cavity of the piston pin hole C 9-1 and then retract inwards. When it contacts the outer conical surface of the cone structure 5-1 of the top column 5, the position is locked and the piston is fixed. Figure 7 Continue pulling the lifting device upwards to lift the piston as shown.

[0042] Step 5): After lifting the piston 9 to the designated location, lower the hook and the sling descends. Since there is no 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 inward 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, separate from the piston, and continue to lift the next piston.

[0043] Compared with the traditional lifting method, the utility model is compact, convenient and easy to operate, can realize the rapid positioning of the piston and the lifting device, realizes safe and efficient lifting, and greatly improves the transportation and processing quality; during the lifting process, the lifting personnel do not need to come into contact with the piston, reducing the risk of bumps and scratches, and by setting a safety lock groove, safety accidents are avoided and hidden dangers of lifting are 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 range of use 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.

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0045] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method 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 methods that can be understood by those skilled in the art.

Claims

1. A lifting device for rapid lifting of pistons, characterized by: The invention comprises a base (1), wherein the base (1) is provided with an installation inner cavity (1-1) which is passed through from top to bottom, a plurality of support blocks (4) are evenly distributed around the lower end of the base (1), the support blocks (4) and the base (1) are movably connected, a top column (5) is provided through the installation inner cavity (1-1) of the base (1) from top to bottom, 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), the lower end of the base (1), the support block (4) in a naturally drooping state, and the cone structure (5-1) at the lower end of the top column (5) can all pass through the gap in the piston pin hole C (9-1) of the piston (9), and when the cone structure (5-1) moves upward under the drive of the top column (5), the support block (4) is opened and contacts the inner wall surface of the piston pin hole C (9-1) of the piston (9).

2. The lifting device for rapid piston lifting according to claim 1, characterized in that: The lower end of the base (1) is uniformly 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) via a bearing (3).

3. The lifting device for rapid piston lifting according to claim 1, characterized in that: 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 surface of the support block (4) for contacting the cone structure (5-1) is an inclined surface (4-1); and the surface of the support block (4) 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. The lifting device for rapid piston lifting according to claim 1, characterized in that: The top column (5) is provided with a safety locking structure on the upper part thereof, which enables the cone structure (5-1) to continuously keep the support block (4) open; the safety locking structure comprises a connecting block (6), which is fixedly connected to the upper end of the top column (5); the upper end surface of the base (1) is located in the upper periphery of the mounting inner cavity (1-1); a safety locking groove X (1-2) and a safety locking groove Y (1-3) are provided; the directions of the safety locking groove X (1-2) and the safety locking groove Y (1-3) are perpendicular; there is a height difference between the bottom surfaces of the safety locking groove X (1-2) and the safety locking groove Y (1-3), wherein the bottom surface of the safety locking groove X (1-2) is lower than the bottom surface of the safety locking groove Y (1-3).

5. The 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 portion of the connecting block (6), and a lifting ring II (8) is provided on the upper end surface of the base body (1).

6. The lifting device for rapid piston lifting 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.

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