Crane for elevator maintenance

Abstract

The utility model relates to the technical field of cranes, and particularly discloses a crane for elevator maintenance, which comprises a base, two folding legs are symmetrically and rotatably mounted on the base, universal wheels are fixedly mounted on the left and right sides of the bottom of the base and at the front ends of the bottoms of the folding legs, and a stand column and a pull rod are fixedly mounted at the top of the base. A cantilever is rotatably installed on the top of the stand column, a first air cylinder is fixedly installed on the top of the telescopic cantilever, and a connecting plate is fixedly installed at the position, located at the telescopic end, of the top of the telescopic cantilever. A workpiece is installed on the hook, the telescopic cantilever is driven by the second air cylinder to be lifted, and therefore the workpiece can be moved to a proper height, and when the crane needs to be folded, the inclined face clamping block slides out of the clamping groove by pushing the push rod, so that the insertion block installed on the installation block can be detached from the insertion groove.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a crane for elevator maintenance. Background Art

[0002] A crane is a common lifting equipment. For example, in elevator maintenance work, it is often necessary to use a crane to lift objects such as traction machines. The structure of a conventional crane usually includes a base assembly with running wheels at the bottom, a column assembly arranged on the base assembly, a cantilever assembly hinged to the top of the column assembly, a lifting cylinder is arranged between the cantilever assembly and the column assembly, and a lifting component is arranged at the end of the cantilever assembly.

[0003] Most conventional cranes are foldable, and the folding effect is often achieved by contracting the cylinder to drive the cantilever assembly to rotate. However, this method does not have a good folding effect, and the crane still occupies a large space. When the elevator is being repaired, the crane needs to be moved to the elevator room, which is inconvenient to carry and transport.

[0004] For this reason, we propose a crane for elevator maintenance. Utility Model Content

[0005] The purpose of the utility model is to provide a hoist for elevator maintenance to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a crane for elevator maintenance, comprising a base, two folding legs are symmetrically and rotatably installed on the base, universal wheels are fixedly installed on the left and right sides of the bottom of the base and the front end of the bottom of the folding legs, a column and a pull rod are fixedly installed on the top of the base, a cantilever is rotatably installed on the top of the column, the telescopic cantilever, a cylinder 1 is fixedly installed on the top of the telescopic cantilever, a connecting plate is fixedly installed on the top of the telescopic cantilever at the position of the telescopic end, the telescopic end of the cylinder 1 is fixedly installed on the connecting plate, a hook is fixedly connected to the bottom of the telescopic cantilever at the position of the telescopic end, a mounting seat is fixedly installed on the column, a cylinder 2 is rotatably installed in the mounting seat, an insert assembly is fixedly installed on the telescopic end of the cylinder 2, and the telescopic end of the cylinder 2 is fixedly installed on the bottom of the telescopic cantilever through the insert assembly.

[0007] Wherein, the insertion component comprises a mounting block, the mounting block is fixedly mounted on the telescopic end of the second cylinder, and a clamping component is fixedly mounted on the top of the mounting block.

[0008] Among them, the clamping assembly includes an insert block, the insert block is fixedly installed on the top of the installation block, the bottom of the telescopic cantilever is provided with an insert slot for the insert block to be inserted, a telescopic slot is provided in the center of one side of the insert block, a telescopic rod is fixedly installed in the center of the left side of the telescopic slot cavity, an inclined clamping block is fixedly installed at the telescopic end of the telescopic rod, a spring is sleeved on the surface of the telescopic rod, the left end of the spring is fixedly welded to the left side of the telescopic slot cavity, and the right end of the spring is fixedly welded to the side of the inclined clamping block.

[0009] Wherein, a card slot adapted to the inclined card block is provided in the telescopic cantilever.

[0010] Among them, a disassembly assembly is fixedly installed at the bottom of the inclined surface block, and the disassembly assembly includes a connecting rod, which is fixedly installed at the bottom of the inclined surface block, and a push rod is rotatably installed at one end of the connecting rod away from the inclined surface block, a sliding groove 1 for the connecting rod to slide is opened inside the mounting block, and a sliding groove 2 for the push rod to slide is opened on the side of the mounting block.

[0011] Wherein, a limit block is fixedly installed on the top of the push rod surface, and a sliding groove three for the limit block to slide is opened on the side of the installation block.

[0012] Wherein, a rotation groove for the limit block to rotate is opened in the installation block, and the rotation groove is connected with the slide groove.

[0013] The utility model has at least the following beneficial effects:

[0014] The utility model fixes the telescopic end of the second cylinder and the telescopic cantilever by arranging an insert component. When working, the workpiece is installed on the hook and the telescopic cantilever is driven to be lifted by the second cylinder, so that the workpiece can be moved to an appropriate height. When the crane needs to be folded, the inclined surface block is slid out of the slot by pushing the push rod, so that the insert block installed on the mounting block can be removed from the mounting slot, so that the telescopic end of the cylinder can be removed from the telescopic cantilever, and then the second cylinder is retracted and then rotated to a horizontal setting on the mounting seat, and then the telescopic cantilever is driven to retract by the first cylinder, and then the telescopic cantilever is rotated to be folded in the inner cavity of the column, and then the second cylinder is rotated to be parallel to the column, and finally the two folding legs are rotated and folded, so that the crane can be folded to be more compact, the floor space thereof becomes smaller, and it is more convenient to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a crane for elevator maintenance according to the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of a folded elevator maintenance crane according to the utility model;

[0017] Figure 3This is a structural schematic diagram of a crane installation component for elevator maintenance of the utility model;

[0018] Figure 4 for Figure 3 A partial enlarged schematic diagram of the structure at center A;

[0019] Figure 5 The utility model is a schematic diagram of the cross-sectional structure of a crane disassembly assembly for elevator maintenance.

[0020] In the figure: 1. base; 2. universal wheel; 3. folding leg; 4. column; 5. telescopic cantilever; 6. cylinder one; 7. hook; 8. cylinder two; 9. installation component; 91. mounting block; 92. clamping component; 921. installation block; 922. installation slot; 923. telescopic slot; 924. telescopic rod; 925. spring; 926. inclined clamping block; 927. clamping slot; 93. disassembly component; 931. connecting rod; 932. slide slot one; 933. push rod; 934. limit block; 935. slide slot three; 936. rotating slot; 937. slide slot two; 10. connecting plate; 11. pull rod; 12. mounting base. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1

[0023] See also Figure 1-5 The utility model provides a technical solution: a crane for elevator maintenance, comprising a base 1, two folding legs 3 are symmetrically rotatably installed on the base 1, universal wheels 2 are fixedly installed on the left and right sides of the bottom of the base 1 and the front end of the bottom of the folding legs 3, a column 4 and a pull rod 11 are fixedly installed on the top of the base 1, a telescopic cantilever 5 is rotatably installed on the top of the column 4, the telescopic cantilever 5, a cylinder 1 6 is fixedly installed on the top of the telescopic cantilever 5, a connecting plate 10 is fixedly installed at the top of the telescopic cantilever 5 at the position of the telescopic end, the telescopic end of the cylinder 1 6 is fixedly installed on the connecting plate 10, a hook 7 is fixedly connected to the bottom of the telescopic cantilever 5 at the position of the telescopic end, a mounting seat 12 is fixedly installed on the column 4, a cylinder 2 8 is rotatably installed in the mounting seat 12, a plug-in assembly 9 is fixedly installed on the telescopic end of the cylinder 2 8, and the telescopic end of the cylinder 2 8 is fixedly installed at the bottom of the telescopic cantilever 5 through the plug-in assembly 9;

[0024] During operation, the telescopic cantilever 5 is extended to the required length by starting the cylinder 1 6, the workpiece is mounted on the hook 7, and the telescopic cantilever 5 is lifted by the cylinder 2 8, so that the workpiece can be moved to an appropriate height. When the crane needs to be folded for transportation, the two folding legs 3 are rotated and folded to a vertical position, and the cylinder 1 6 drives the telescopic cantilever 5 to retract, so that the crane can be folded to be more compact, so that its footprint becomes smaller and it is more convenient to carry.

[0025] The insertion assembly 9 includes a mounting block 91, which is fixedly mounted on the telescopic end of the cylinder 2 8, and a clamping assembly 92 is fixedly mounted on the top of the mounting block 91;

[0026] The clamping assembly 92 includes an insert block 921, which is fixedly mounted on the top of the installation block 91. An insert slot 922 for inserting the insert block 921 is provided at the bottom of the telescopic cantilever 5. A telescopic slot 923 is provided at the center of one side of the insert block 921. A telescopic rod 924 is fixedly mounted at the center of the left side of the telescopic slot 923. An inclined clamping block 926 is fixedly mounted at the telescopic end of the telescopic rod 924. A spring 925 is sleeved on the surface of the telescopic rod 924. The left end of the spring 925 is fixedly welded to the left side of the telescopic slot 923. The right end of the spring 925 is fixedly welded to the side of the inclined clamping block 926.

[0027] The telescopic end of the cylinder 2 8 is fixedly connected to the telescopic cantilever 5 through the provided insertion assembly 9. The specific installation operation is: by inserting the insertion block 921 into the installation slot 922, the inclined surface of the inclined surface block 926 provided on the insertion block 921 is subjected to force. Through the decomposition of the force, it can be known that the inclined surface block 926 will be subjected to a force in the direction of the telescopic slot 923, so that the inclined surface block 926 slides into the telescopic slot 923, and at the same time compresses the spring 925 and the telescopic rod 924, so that the insertion block 921 can be inserted Into the installation slot 922, and when the installation block 921 is inserted into the installation slot 922, the inclined clamping block 926 is just located at the position of the clamping slot 927, so that the inclined clamping block 926 is clamped in the clamping slot 927. When you want to separate the telescopic end of the cylinder 8 from the telescopic cantilever 5, you can disassemble them through the set disassembly component 93, and then rotate the telescopic cantilever 5 to fold it in the inner cavity of the column 4, so that the crane can be folded to be more compact, its footprint becomes smaller, it is more convenient to carry, and the disassembly and assembly are simple and convenient.

[0028] A slot 927 adapted to the inclined surface block 926 is provided in the telescopic cantilever 5;

[0029] When the insertion block 921 is inserted into the installation slot 922, the inclined clamping block 926 is clamped in the clamping slot 927, so that the insertion block 921 cannot be directly pulled out from the installation slot 922. When the insertion block 921 wants to be pulled out, the force-bearing surface of the inclined clamping block 926 is the bottom plane. The force-bearing surface of the inclined clamping block 926 is parallel to the surface that acts on it, and the action force and the reaction force cancel each other out. The inclined clamping block 926 is not subjected to any force, so that it is clamped in the clamping slot 927, so that the insertion block 921 cannot be pulled out from the installation slot 922, making the structure more stable and firm.

[0030] A disassembly assembly 93 is fixedly installed at the bottom of the inclined surface block 926. The disassembly assembly 93 includes a connecting rod 931, which is fixedly installed at the bottom of the inclined surface block 926. A push rod 933 is rotatably installed at one end of the connecting rod 931 away from the inclined surface block 926. A slide groove 932 for sliding the connecting rod 931 is provided inside the mounting block 91, and a slide groove 937 for sliding the push rod 933 is provided on the side of the mounting block 91.

[0031] When you want to separate the telescopic end of the cylinder 2 8 from the telescopic cantilever 5, by pushing the push rod 933, the push rod 933 slides in the second slide groove 937, and at the same time drives the connecting rod 931 fixedly connected to it to slide in the first slide groove 932, indirectly driving the inclined surface block 926 fixedly connected to the connecting rod 931 to slide toward the telescopic groove 923, so that the inclined surface block 926 is no longer clamped in the clamping groove 927, so that the insertion block 921 can be taken out from the insertion groove 922, so that the telescopic end of the cylinder 2 8 is separated from the telescopic cantilever 5, and then the telescopic cantilever 5 is rotated to fold in the inner cavity of the column 4, so that the crane can be folded to be more compact, its footprint becomes smaller, it is more convenient to carry, and the disassembly and assembly are simple and convenient.

[0032] Embodiment 2

[0033] A limit block 934 is fixedly installed on the top of the push rod 933, and a sliding groove 935 is provided on the side of the mounting block 91 for the limit block 934 to slide.

[0034] The mounting block 91 is provided with a rotation groove 936 for the limit block 934 to rotate, and the rotation groove 936 is connected to the third slide groove 935;

[0035] By pushing the push rod 933, the limit block 934 fixed thereon is driven to slide through the slide groove 935 to the rotating groove 936, and the inclined block 926 slides into the telescopic groove 923. Then, the push rod 933 is rotated, and the push rod 933 drives the limit block 934 to rotate 90° in the rotating groove 936. Then, the hand pushing the push rod 933 is released, and the push rod 933 is limited in this position. The inclined block 926 is connected to the groove 927 due to the rebound of the spring 925, and the rotating groove 936 is only for the limit block 934 to rotate 90°. By setting the limit block 934 to cooperate with the rotating groove 936, the operator does not need to push the push rod 933 by hand all the time, and the operation is simpler and more convenient.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants 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 other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A crane for elevator maintenance, comprising a base (1), characterized in that: Two folding legs (3) are symmetrically mounted on the base (1) for rotation. Universal wheels (2) are fixedly mounted on the left and right sides of the bottom of the base (1) and the front end of the bottom of the folding legs (3). A column (4) and a pull rod (11) are fixedly mounted on the top of the base (1). A telescopic cantilever (5) is rotatably mounted on the top of the column (4). A cylinder (6) is fixedly mounted on the top of the telescopic cantilever (5). A connecting rod (11) is fixedly mounted on the top of the telescopic cantilever (5). A connecting plate (10), the telescopic end of the cylinder one (6) is fixedly mounted on the connecting plate (10), a hook (7) is fixedly connected to the bottom of the telescopic cantilever (5) at the position of the telescopic end, a mounting seat (12) is fixedly mounted on the column (4), a cylinder two (8) is rotatably mounted in the mounting seat (12), a plug-in assembly (9) is fixedly mounted on the telescopic end of the cylinder two (8), and the telescopic end of the cylinder two (8) is fixedly mounted on the bottom of the telescopic cantilever (5) through the plug-in assembly (9); The insertion assembly (9) comprises a mounting block (91), the mounting block (91) is fixedly mounted on the telescopic end of the second cylinder (8), and a clamping assembly (92) is fixedly mounted on the top of the mounting block (91); A clamping groove (927) adapted to the inclined clamping block (926) is provided in the telescopic cantilever (5).

2. The elevator maintenance crane according to claim 1, characterized in that: The clamping assembly (92) comprises an insert block (921), wherein the insert block (921) is fixedly mounted on the top of the installation block (91); a mounting slot (922) for the insert block (921) to be mounted is provided at the bottom of the telescopic cantilever (5); a telescopic slot (923) is provided at the center of one side of the insert block (921); a telescopic rod (924) is fixedly mounted at the center of the left side of the slot cavity of the telescopic slot (923); a bevel clamping block (926) is fixedly mounted at the telescopic end of the telescopic rod (924); a spring (925) is sleeved on the surface of the telescopic rod (924); the left end of the spring (925) is fixedly welded to the left side of the slot cavity of the telescopic slot (923); and the right end of the spring (925) is fixedly welded to the side of the bevel clamping block (926).

3. The elevator maintenance crane according to claim 1, characterized in that: A disassembly assembly (93) is fixedly installed at the bottom of the inclined surface block (926), and the disassembly assembly (93) includes a connecting rod (931), and the connecting rod (931) is fixedly installed at the bottom of the inclined surface block (926). A push rod (933) is rotatably installed at one end of the connecting rod (931) away from the inclined surface block (926). A sliding groove (932) for the connecting rod (931) to slide is provided inside the mounting block (91), and a sliding groove (937) for the push rod (933) to slide is provided on the side of the mounting block (91).

4. The elevator maintenance crane according to claim 3, characterized in that: A limit block (934) is fixedly mounted on the top of the surface of the push rod (933), and a sliding groove (935) for the limit block (934) to slide is provided on the side of the mounting block (91).

5. The elevator maintenance crane according to claim 4, characterized in that: The mounting block (91) is provided with a rotation groove (936) for the limit block (934) to rotate, and the rotation groove (936) is connected to the third slide groove (935).

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