Crane boom tip pulley structure and crane

Abstract

The utility model relates to the technical field of cranes, and discloses a crane boom tip pulley structure and a crane, and the crane boom tip pulley structure comprises a pulley yoke, a boom tip pulley, a driving piece and a sling. The pulley yoke can be detachably arranged at a mounting position of an arm head of the crane through a fastener; the arm tip pulley is rotatably arranged on the pulley yoke through a rotating shaft; the driving part is suitable for being arranged on the crane; the sling is connected with the pulley yoke and the driving piece; the driving piece can drive the pulley yoke to move to the installation position relative to the arm head through the sling, so that the pulley yoke is fixed to the arm head through the fastener, or the pulley yoke is driven to leave the installation position after the connection state of the pulley yoke and the arm head is released. According to the crane boom tip pulley structure, the pulley yoke and the driving piece are connected through the sling, and the sling can pull the pulley yoke to move relative to the boom head, so that the pulley yoke and the boom head are fixed or detached at the mounting position through the fastener, and the crane boom tip pulley structure is simple to operate and convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a crane arm tip pulley structure and a crane. Background Art

[0002] Cranes are essential mechanical equipment in engineering construction. The boom is an important part of the crane, which can lift objects through the cooperation of pulleys and slings.

[0003] like Figure 1 As shown, the arm head 3' of the last arm of the crane arm is usually equipped with an arm tip pulley structure, and the arm tip pulley 4' satisfies the simultaneous use of the main hoisting hook and the auxiliary hoisting hook to achieve rapid lifting.

[0004] Currently, if Figure 2 As shown, the pulley frame 1' of the arm tip pulley 4' is generally fixed to the arm head 3' of the crane through a fastener 2', such as a pin. However, since the arm tip pulley structure is heavy, auxiliary equipment such as a crane, a forklift, etc. are needed to realize the installation and disassembly of the arm tip pulley structure and the arm head 3', which is cumbersome and inconvenient to use. Utility Model Content

[0005] In view of this, the utility model provides a crane arm tip pulley structure and a crane to solve the problem that the installation and disassembly operations of the arm tip pulley structure and the arm head are complicated, resulting in inconvenience in use.

[0006] In a first aspect, the utility model provides a crane arm tip pulley structure, comprising:

[0007] A pulley frame can be detachably mounted on the mounting position of the boom head of the crane by means of fasteners;

[0008] The arm tip pulley is rotatably arranged on the pulley frame via a rotating shaft;

[0009] A driving member, suitable for being arranged on a crane;

[0010] A sling connected to the pulley frame and the driving member;

[0011] The driving member can drive the pulley frame to move to the installation position relative to the arm head through the sling, so that the pulley frame is fixed to the arm head through the fastener, or drive the pulley frame to leave the installation position after releasing the connection between the pulley frame and the arm head.

[0012] Beneficial effects: The crane boom tip pulley structure of the utility model connects the pulley frame and the driving member through a sling, and the sling can pull the pulley frame to move relative to the boom head so that the pulley frame is fixed to the boom head at the installation position through a fastener to achieve installation; or after the connection between the pulley frame and the boom head is released, the pulley frame is driven away from the installation position to achieve disassembly. The operation is simple and convenient to use. No other auxiliary equipment is required. The boom tip pulley can be installed and disassembled by one person. The use cost is low and the efficiency of installing and disassembling the boom tip pulley is high.

[0013] In an optional embodiment, a plurality of through holes are provided at intervals along the width direction of the pulley frame at one end where the pulley frame is connected to the arm head, a plurality of fasteners are provided and correspond one-to-one to the plurality of through holes, and the fasteners pass through the through holes and are fixedly connected to the arm head.

[0014] Beneficial effects: multiple through holes can provide multiple installation methods for fasteners, which is convenient to use. Multiple fasteners can improve the connection stability between the pulley frame and the boom head. In addition, the pulley frame can be installed with different types of boom heads, thereby improving the compatibility and application range of the crane boom tip pulley structure.

[0015] In an optional embodiment, the pulley frame includes a first frame plate, a second frame plate and a connecting plate fixedly connecting the first frame plate and the second frame plate, the first frame plate is provided with a plurality of first through holes at intervals, the second frame plate is provided with a plurality of second through holes corresponding to the plurality of first through holes at intervals, and the fasteners pass through the first through holes and the second through holes to be connected to the arm head.

[0016] Beneficial effect: The pulley frame is arranged in the form of a first frame plate, a second frame plate and a connecting plate, and the structure is stable. The fastener passes through the first through hole on the first frame plate and the second through hole on the second frame plate to achieve fixed connection between the pulley frame and the arm head, which can further improve the connection stability between the pulley frame and the arm head.

[0017] In an optional embodiment, a lifting lug is provided on the pulley frame, and one end of the lifting rope is fixed on the lifting lug.

[0018] Beneficial effect: By arranging the lifting lugs on the pulley frame, the sling can be quickly installed, thereby improving the use efficiency of the crane arm tip pulley structure.

[0019] In an optional embodiment, a plurality of lifting ears are provided and are spaced apart on the upper surface of the pulley frame.

[0020] Beneficial effect: By setting a plurality of lifting ears, the installation position of the sling can be selected according to the actual situation, and a variety of sling installation forms are provided, further improving the compatibility and application range of the crane arm tip pulley structure.

[0021] In an optional embodiment, a plurality of slings are provided, and each lifting eye is fixed with at least one sling.

[0022] Beneficial effect: by setting a plurality of slings, when one of the slings is broken or damaged, the pulley frame and the boom head can continue to be connected through other slings, thus preventing the safety accidents caused by the sling breakage and improving the safety of the crane boom tip pulley structure.

[0023] In an optional embodiment, one end of the pulley frame connected to the arm tip pulley forms two oppositely arranged support ears, and the two ends of the rotating shaft are respectively mounted on the two support ears.

[0024] Beneficial effect: one end of the pulley frame connected to the arm tip pulley forms two oppositely arranged support ears, and the two ends of the rotating shaft are respectively installed on the two support ears. The two support ears can provide support for the rotating shaft, which is beneficial to the installation of the rotating shaft.

[0025] In a second aspect, the utility model further provides a crane, comprising:

[0026] arm head;

[0027] In the above-mentioned crane arm tip pulley structure, the pulley frame is detachably arranged at the installation position of the arm head through fasteners.

[0028] Beneficial effects: because the crane includes a crane boom tip pulley structure, it has the same effect as the crane boom tip pulley structure, that is, the pulley frame and the driving member are connected by a sling, and the sling can pull the pulley frame to move relative to the boom head, so that the pulley frame is fixed to the boom head at the installation position by a fastener to achieve installation; or after the connection between the pulley frame and the boom head is released, the pulley frame is driven away from the installation position to achieve disassembly. The operation is simple and easy to use, and no other auxiliary equipment is required. The boom tip pulley can be installed and disassembled by a single person, and the use cost is low and the efficiency of installing and disassembling the boom tip pulley is high.

[0029] In an optional embodiment, the arm head extends toward the pulley frame to form a mounting end for mounting the pulley frame, and a plurality of sleeves are provided at intervals on the mounting end along the length direction of the arm head.

[0030] Beneficial effect: The fastener passes through the sleeve to achieve fixed connection with the mounting end of the arm head, which can improve the connection stability between the fastener and the arm head and prevent the fastener from shaking.

[0031] In an optional embodiment, through holes are respectively opened at both ends of the sleeve corresponding to one end where the pulley frame is connected to the arm head, and multiple fasteners are provided. The fasteners pass through the sleeve and the through holes at both ends to connect the pulley frame and the arm head.

[0032] Beneficial effect: When the pulley frame and the arm head are installed, it is only necessary to align the through hole of the pulley frame with the sleeve, and then pass the fastener through the sleeve and the through holes at both ends thereof, which is convenient for installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a structural schematic diagram of an existing crane;

[0035] Figure 2 for Figure 1 A schematic structural diagram of the arm tip pulley structure of the crane;

[0036] Figure 3 This is a structural schematic diagram of a crane arm tip pulley structure according to an embodiment of the utility model;

[0037] Figure 4 for Figure 3 The main view of

[0038] Figure 5 for Figure 4 A partial enlarged view of

[0039] Figure 6 for Figure 3 Left view of .

[0040] Description of reference numerals:

[0041] Existing technology: 1', pulley frame; 2', fastener; 3', arm head; 4', arm tip pulley.

[0042] Embodiments of the utility model: 1. pulley frame; 101. first frame plate; 102. second frame plate; 103. connecting plate; 104. lifting ear; 105. supporting ear; 2. fastener; 3. arm head; 301. sleeve; 4. arm tip pulley; 5. rotating shaft; 6. sling; 7. top pulley. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0044] The crane arm tip pulley structure is fixed to the boom head by fasteners. Since the arm tip pulley structure is heavy, it needs to rely on auxiliary equipment to achieve installation and removal with the boom head, which is cumbersome to operate and inconvenient to use. The embodiment of the utility model connects the pulley frame and the driving member by a sling, and the sling can pull the pulley frame to move relative to the boom head, so that the pulley frame of the crane arm tip pulley structure is fixed to or removed from the boom head by fasteners, which is simple to operate and convenient to use.

[0045] Combine the following Figures 1 to 6 , describing an embodiment of the utility model.

[0046] According to an embodiment of the present utility model, on the one hand, as Figure 3 As shown, a crane boom tip pulley structure is provided, which mainly includes: a pulley frame 1, a boom tip pulley 4, a driving member and a sling 6. The pulley frame 1 can be detachably arranged at the installation position of the boom head 3 of the crane through a fastener 2. The boom tip pulley 4 is rotatably arranged on the pulley frame 1 through a rotating shaft 5. The driving member is suitable for being arranged on the crane. The sling 6 is connected to the pulley frame 1 and the driving member. The driving member can drive the pulley frame 1 to move relative to the boom head 3 through the sling 6, so that the pulley frame 1 is fixed to the boom head 3 through the fastener 2, or drive the pulley frame 1 to leave the installation position after the connection state between the pulley frame 1 and the boom head 3 is released.

[0047] The crane arm tip pulley structure of the utility model embodiment connects the pulley frame 1 and the driving member through a sling 6, and the sling 6 can pull the pulley frame 1 to move relative to the arm head 3, so that the pulley frame 1 is fixed with the arm head 3 at the installation position through the fastener 2 to achieve installation; or after the connection state between the pulley frame 1 and the arm head 3 is released, the pulley frame 1 is driven to leave the installation position to achieve disassembly, which is simple to operate and convenient to use.

[0048] Compared with the traditional crane arm tip pulley structure, which is fixed on the arm head 3 by fasteners 2, the removal and installation of the crane arm tip pulley structure requires auxiliary equipment and multi-person collaboration. The crane arm tip pulley structure of the embodiment of the utility model does not require other auxiliary equipment. The crane arm tip pulley structure and the arm head 3 can be installed and removed by adjusting the relative position of the pulley frame 1 and the arm head 3 by a single person controlling the driving member. The use cost is low and the installation and removal efficiency is high.

[0049] Specifically, the pulley frame 1 is used to support the arm tip pulley 4 and is detachably fixedly connected to the arm head 3 through the fastener 2.

[0050] It should be noted that the embodiment of the utility model does not limit the driving member (not shown in the figure), and conventional driving members such as a drum, a hoist, and a driving motor can be used as needed. In addition, the sling 6 and the fastener 2 are not limited. The sling 6 can be a steel wire rope, which has low cost and can drive the pulley frame 1 to rise or fall relative to the arm head 3. The fastener 2 can be a conventional detachable fastener such as a pin, a fixed shaft, a bolt nut, a buckle, etc., which has a simple structure and is easy to use.

[0051] Specifically, when the crane boom tip pulley structure is installed with the boom head 3, the driving component is controlled to rotate forward, the pulley frame 1 and the boom tip pulley 4 thereon move downward under the action of their own gravity, and the sling 6 plays the role of supporting the pulley frame 1. Then, the boom tip pulley 4 is lowered to the installation position corresponding to the boom head 3, and finally the pulley frame 1 and the boom head 3 are fixedly connected by the fastener 2.

[0052] Similarly, when the crane arm tip pulley structure and the arm head 3 are disassembled, the fastener 2 is removed from the crane arm tip pulley structure and the arm head 3 in advance, and the sling 6 can pull the crane arm tip pulley structure to prevent it from falling. After that, the driving member is controlled to reverse, and the traction force generated by the sling 6 is used to lift the pulley frame 1 and the arm tip pulley 4 thereon to a preset height as a whole.

[0053] In one embodiment, a plurality of through holes are provided at intervals along the width direction of the pulley frame 1 at one end of the pulley frame 1 connected to the arm head 3. Figure 6 As shown by arrow A in FIG. 2 . A plurality of fasteners 2 are provided and correspond to a plurality of through holes one by one, and the fasteners 2 are fixedly connected to the boom head 3 through the through holes. The provision of a plurality of through holes can provide a plurality of installation methods for the fasteners 2, which is convenient for use. The provision of a plurality of fasteners 2 can improve the connection stability between the pulley frame 1 and the boom head 3. In addition, the pulley frame 1 can also be installed with different types of boom heads 3, thereby improving the compatibility and application range of the crane boom tip pulley structure.

[0054] It should be noted that the embodiment of the utility model does not limit the specific number of through holes and fasteners 2. Two, three or more through holes can be set as needed. In addition, the spacing of multiple through holes can be set according to actual needs. For example, multiple through holes can be set at equal intervals. Two, three or more fasteners 2 can also be set as needed. In addition, the number of through holes can be greater than the number of fasteners 2 to provide a variety of installation methods.

[0055] In order to reduce the use cost, in one embodiment, two fasteners 2 can be selected and two through holes are also provided. The fasteners 2 are symmetrically installed on the pulley frame 1 to improve the connection stability between the fasteners 2 and the pulley frame 1.

[0056] In one embodiment, Figure 3As shown, the pulley frame 1 includes a first frame plate 101 and a second frame plate 102 arranged in parallel and spaced apart along the length direction of the arm head 3, and a connecting plate 103 fixedly connecting the first frame plate 101 and the second frame plate 102. Figure 6 As shown by arrow B in FIG. A plurality of first through holes are provided at intervals on the first frame plate 101, a plurality of second through holes are provided at intervals on the second frame plate 102, and the fastener 2 passes through the first through holes and the second through holes to connect with the arm head 3. The pulley frame 1 is configured in the form of a first frame plate 101, a second frame plate 102 and a connecting plate 103, and the structure is stable. The fastener 2 passes through the first through hole on the first frame plate 101 and the second through hole on the second frame plate 102 to achieve fixed connection between the pulley frame 1 and the arm head 3, which can further improve the connection stability between the pulley frame 1 and the arm head 3.

[0057] Specifically, the first frame plate 101, the second frame plate 102 and the connecting plate 103 can be welded and connected as a whole to improve the structural stability of the pulley frame 1. The fastener 2 can be a pin, and the multiple first through holes and the multiple second through holes can be circular pin holes with the same diameter, which is convenient for the fastener 2 to pass through the first through hole on the first frame plate 101 and the second through hole on the second frame plate 102 to connect with the arm head 3. The size of the pin matches the diameter of the first through hole and the second through hole. One end of the pin passing through the first through hole and the second through hole is in a conical structure to reduce the difficulty of the pin passing through the first through hole and the second through hole, so as to facilitate the installation of the pin. The other end of the pin forms a support surface fixed on the upper surface of the first frame plate 101.

[0058] In one embodiment, a lifting eye 104 is provided on the pulley frame 1. One end of the sling 6 is fixed on the lifting eye 104. For example, when the sling 6 is a steel wire rope, the rope end of the steel wire rope is fixed on the lifting eye 104. By providing the lifting eye 104 on the pulley frame 1, the sling 6 can be quickly installed, thereby improving the use efficiency of the crane arm tip pulley structure.

[0059] Specifically, Figure 4 As shown, the lifting lug 104 is fixedly mounted on the upper surface of the first frame plate 101, located in the middle area between the arm tip pulley 4 and the plurality of first through holes. The fixing installation form of the lifting lug 104 and the first frame plate 101 can be a fastening fixing form or a detachable fixing form. In order to improve the connection stability between the lifting lug 104 and the first frame plate 101, the lifting lug 104 can be welded to the upper surface of the first frame plate 101, for example.

[0060] Of course, in some other embodiments, the lifting ear 104 can also be fixedly installed on the side of the first frame plate 101 as needed. The specific setting can be based on actual needs, and the embodiment of the utility model does not impose too many restrictions on this.

[0061] In one embodiment, a plurality of lifting ears 104 are provided, and are spaced apart on the upper surface of the pulley frame 1. The number of lifting ears 104 can be set to two, three, or more than three as required. The lifting ears 104 can be spaced apart along the width direction of the pulley frame 1, or can be spaced apart along the length direction of the pulley frame 1. Of course, the lifting ears 104 can also be set in other ways according to actual needs. By providing a plurality of lifting ears 104, the installation position of the sling 6 can be selected according to actual conditions, and a variety of installation forms of the sling 6 can be provided, further improving the compatibility and application range of the crane arm tip pulley structure.

[0062] In one embodiment, a plurality of slings 6 are provided, and at least one sling 6 is fixed to each lifting lug 104. By providing a plurality of slings 6, when one sling 6 is broken or damaged, the pulley frame 1 and the boom head 3 can be continuously connected through other slings 6, thereby preventing safety accidents caused by the breakage of the sling 6 and improving the safety of the crane boom tip pulley structure.

[0063] In one embodiment, Figure 3 and Figure 5 As shown, one end of the pulley frame 1 connected to the arm tip pulley 4 forms two oppositely arranged support ears 105, and the two ends of the rotating shaft 5 are respectively installed on the two support ears 105. The two support ears 105 can provide support for the rotating shaft 5, which is convenient for the installation of the rotating shaft 5. Specifically, the pulley frame 1 forms a quasi-triangular structure, and the two support ears 105 are located at the corners of the quasi-triangular structure, and half surround the arm tip pulley 4, and are fixed by two bolts to improve the connection stability between the pulley frame 1 and the arm tip pulley 4, and the structure is simple. One side of the quasi-triangular structure is close to the arm head 3 to prevent the pulley frame 1 and the arm head 3 from shaking.

[0064] In one embodiment, the crane arm tip pulley structure further includes a controller, and the driving member is electrically connected to the controller. The operator can control the driving member through the controller to remotely adjust the relative position of the pulley frame 1 and the arm head 3, so as to facilitate the rapid installation and removal of the pulley frame 1 and the arm head 3. The controller can be selected from any existing type according to actual needs, for example, any one of a CAN (Controller Area Network) chip, a power chip, and an MCU (Microcontroller Unit) can be selected.

[0065] According to an embodiment of the present invention, on the other hand, a crane is provided, which mainly comprises a boom head 3 and a crane boom tip pulley 4 structure. The pulley frame 1 is detachably arranged at the installation position of the boom head 3 through a fastener 2.

[0066] Because the crane includes a crane boom tip pulley structure, it has the same effect as the crane boom tip pulley structure, that is, the pulley frame 1 and the driving member are connected by a sling 6, and the sling 6 can pull the pulley frame 1 to move relative to the boom head 3, so that the pulley frame 1 is fixed to the boom head 3 at the installation position by the fastener 2 to achieve installation; or after the connection state between the pulley frame 1 and the boom head 3 is released, the pulley frame 1 is driven to leave the installation position to achieve disassembly. The operation is simple and easy to use. No other auxiliary equipment is required. The boom tip pulley 4 can be installed and disassembled by one person, the use cost is low, and the efficiency of installing and disassembling the boom tip pulley 4 is high.

[0067] Specifically, the crane includes a boom, and the boom includes a boom section, a crane boom tip pulley structure, a top pulley 7, a roller and a hook. Among them, the boom section includes a boom head 3 and a boom section body connected to each other. The crane boom tip pulley structure is installed at the front end of the boom head 3. The top pulley 7 is rotatably installed on the top of the boom head 3 through a fixed shaft. The hook is installed at the bottom of the boom head 3. The roller is rotatably installed on the top of the boom section body through a roller shaft. The driving member is installed on the top of the boom section body and is located on the side of the roller away from the top pulley. One end of the sling 6 is fixed to the ear 104 on the pulley frame 1, and is connected to the driving member by passing through the top pulley 7 and the roller in turn. The top pulley 7 plays a role in changing the direction of the sling 6 and reducing the wear of the sling 6. The roller is used to avoid direct contact between the sling 6 and the boom section body, prevent the sling 6 and the boom section body from affecting each other, and reduce the wear of the sling 6.

[0068] In one embodiment, Figure 4 and Figure 6 As shown, the arm head 3 extends toward the pulley frame 1 to form a mounting end for mounting the pulley frame 1, and a plurality of sleeves 301 are provided at intervals along the length direction of the arm head 3. The fastener 2 passes through the sleeve 301 to achieve a fixed connection with the mounting end of the arm head 3, which can improve the connection stability between the fastener 2 and the arm head 3 and prevent the fastener 2 from shaking.

[0069] In one embodiment, through holes are respectively opened at both ends of the sleeve 301 corresponding to the end where the pulley frame 1 is connected to the arm head 3, and a plurality of fasteners 2 are provided. The fasteners 2 pass through the sleeve 301 and the through holes at both ends to connect the pulley frame 1 and the arm head 3. When the pulley frame 1 and the arm head 3 are installed, it is only necessary to align the through hole of the pulley frame 1 with the sleeve 301, and then pass the fasteners 2 through the sleeve 301 and the through holes at both ends to facilitate installation.

[0070] Specifically, the fastener 2 may be selected from two pins, and a plurality of first pin holes are provided at intervals on the first frame plate 101 of the pulley frame 1, and a plurality of second pin holes are provided at intervals on the second frame plate 102, which are opposite to the plurality of first pin holes. The two pins pass through the first pin hole, the sleeve 301, and the second pin hole in sequence from top to bottom to fix the pulley frame 1 and the arm head 3. It should be noted that the first pin hole here serves as the first through hole mentioned above, and the second pin hole serves as the second through hole mentioned above.

[0071] In addition, if Figure 4 As shown, when the crane arm tip pulley structure is fixed to the arm head 3, the lifting lug 104 is not directly below the arm head 3, but is located relatively far away from the arm head 3. The sling 6 is tilted in the vertical direction, and a gap is left between the sleeve 301 and the second pin shaft hole. While the driving member drives the pulley frame 1 to move up and down in the vertical direction through the sling 6, it also has a certain horizontal displacement, so that the sleeve 301 can be installed between the first pin shaft hole and the second pin shaft hole, and when the crane arm tip pulley structure moves upward, the sleeve 301 can be separated from the first pin shaft hole and the second pin shaft hole.

[0072] The working process of the embodiment of the utility model is as follows:

[0073] When installing the crane arm tip pulley structure and the arm head 3, the controller controls the driving part to rotate forward, lowers the arm tip pulley 4 to the installation position corresponding to the arm head 3, and the sling 6 plays the role of supporting the pulley frame 1. The first through hole and the second through hole of the pulley frame 1 are aligned with the upper and lower ends of the sleeve 301 respectively, and finally the fastener 2 is passed through the first through hole, the sleeve 301 and the second through hole from top to bottom in sequence.

[0074] When disassembling the crane arm tip pulley structure and the arm head 3, the fastener 2 is removed from the crane arm tip pulley structure and the arm head 3 in advance, that is, the connection between the pulley frame 1 and the arm head 3 is released, and the sling 6 can pull the crane arm tip pulley structure to prevent it from falling. The controller controls the driving member to reverse, and the traction force generated by the sling 6 lifts the pulley frame 1 and the arm tip pulley 4 thereon to a preset height as a whole.

[0075] In order to realize the basic functions of the crane, the crane in this embodiment may also include other necessary modules or components, such as a turntable, a counterweight, and a chassis. It should be noted that the other necessary modules or components included in the crane can be selected from any suitable existing structures. In order to clearly and briefly explain the technical solution provided by this embodiment, the above part will not be repeated here, and the drawings in the specification are also simplified accordingly. However, it should be understood that the scope of the embodiments of the utility model is not limited by this.

[0076] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A crane arm tip pulley structure, characterized in that: include: A pulley frame (1) can be detachably mounted on a mounting position of a boom head (3) of a crane via a fastener (2); An arm tip pulley (4) is rotatably mounted on the pulley frame (1) via a rotating shaft (5); A driving member, suitable for being arranged on a crane; A sling (6) connected to the pulley frame (1) and the driving member; The driving member can drive the pulley frame (1) to move relative to the arm head (3) to the installation position via the sling (6), so that the pulley frame (1) is fixed to the arm head (3) via the fastener (2), or drive the pulley frame (1) away from the installation position after releasing the connection between the pulley frame (1) and the arm head (3).

2. The crane arm tip pulley structure according to claim 1, characterized in that: One end of the pulley frame (1) connected to the arm head (3) is provided with a plurality of through holes spaced apart along the width direction of the pulley frame (1); a plurality of fasteners (2) are provided and correspond one to one with the plurality of through holes; the fasteners (2) pass through the through holes and are fixedly connected to the arm head (3).

3. The crane arm tip pulley structure according to claim 2, characterized in that: The pulley frame (1) comprises a first frame plate (101), a second frame plate (102) and a connecting plate (103) which are arranged in parallel and at intervals along the length direction of the arm head (3); the first frame plate (101) is provided with a plurality of first through holes at intervals; the second frame plate (102) is provided with a plurality of second through holes which are opposite to the plurality of first through holes at intervals; the fastener (2) passes through the first through holes and the second through holes and is connected to the arm head (3).

4. The crane arm tip pulley structure according to claim 1, characterized in that: The pulley frame (1) is provided with a lifting eye (104), and one end of the lifting rope (6) is fixed on the lifting eye (104).

5. The crane arm tip pulley structure according to claim 4, characterized in that: The lifting ears (104) are provided in plurality and are arranged at intervals on the upper surface of the pulley frame (1).

6. The crane arm tip pulley structure according to claim 5, characterized in that: A plurality of slings (6) are provided, and each of the lifting ears (104) fixes at least one sling (6).

7. The crane arm tip pulley structure according to any one of claims 1 to 6, characterized in that: One end of the pulley frame (1) connected to the arm tip pulley (4) forms two oppositely arranged support ears (105), and the two ends of the rotating shaft (5) are respectively mounted on the two support ears (105).

8. A crane, characterized in that: include: Brachial head (3); The crane arm tip pulley structure according to any one of claims 1 to 7, wherein the pulley frame (1) is detachably arranged at the installation position of the arm head (3) via the fastener (2).

9. The crane according to claim 8, characterized in that The arm head (3) extends toward the pulley frame (1) to form a mounting end for mounting the pulley frame (1), and the mounting end is provided with a plurality of sleeves (301) at intervals along the length direction of the arm head (3).

10. The crane according to claim 9, characterized in that Through holes are respectively provided at the two ends of the sleeve (301) corresponding to the end of the pulley frame (1) connected to the arm head (3), and a plurality of fasteners (2) are provided. The fasteners (2) pass through the sleeve (301) and the through holes at its two ends to connect the pulley frame (1) and the arm head (3).

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