A kind of auxiliary tool for sling lock head disassembly

Abstract

The utility model provides a kind of for hoist lock head dismounting auxiliary tool, belong to lock head dismounting technical field, it includes fixed casing and install two top screw rod on fixed casing, the fixed casing includes bottom plate, and the both sides of bottom plate are respectively vertically fixed with side plate, the upper edge of the length direction both ends of side plate is connected by two end plates, two end plates are vertically arranged, and two top screw rod is respectively installed on two end plates;Cavity is formed between two side plates and is placed into the limiting block in cavity, limiting groove that can be embedded and fixed lock head portion is equipped on limiting block, limiting block is fixed with side plate by limiting screw rod, the through hole is equipped on limiting block and side plate, and limiting screw rod is passed through the through hole on side plate and limiting block after cooperation with limiting nut, the utility model solves the technical problem that the poor commonality of prior art auxiliary tool leads to heavy burden of warehouse management.

Description

Technical Field

[0001] This utility model relates to the field of lifting device lock head disassembly technology, and in particular to an auxiliary tooling for disassembling lifting device lock heads. Background Technology

[0002] In port logistics operations, gantry cranes and rubber-tired gantry cranes are the core equipment for container loading and unloading. The spreader lock head, as a key load-bearing component connecting the spreader and the container, must withstand load impact and friction wear over a long period of time. With increased use, the spreader lock head is prone to problems such as wear on the lock head and jamming of the lock rod, requiring regular disassembly and replacement to ensure the safety of loading and unloading operations.

[0003] Existing lifting gear locks include a lock head, a lock bar, and a lock nut, such as Figure 5 As shown, the lock head 13 is mostly arc-shaped or irregularly shaped to fit the container lock hole; the lock rod 14 is cylindrical, with one end fixedly connected to the lock head 13 and the other end having threads machined on its outer circumference; the lock nut 15 is threaded onto the end of the lock rod, thereby securing the spreader lock head to the spreader. During disassembly, operators typically need to use an extended lever on the nut, leveraging the force to rotate the nut and disengage it from the lock rod. Simultaneously, a wrench must be used to manually clamp the lock head to prevent it from rotating synchronously with the lock rod. However, this disassembly method has a certain drawback: the contact surface between the lock head and the wrench is prone to slippage, causing the lock head to rotate, making nut disassembly difficult. Therefore, in the prior art, operators also use other auxiliary tools, such as the Chinese utility model patent with announcement number CN217195135U, which discloses an auxiliary tool for disassembling a lifting device lock head. It includes a cuboid fixed shell with an opening at the top and a limiting groove adapted to the lock head at the bottom of the fixed shell. When in use, the lock head of the lifting device lock head is inserted into the limiting groove, and the nut at the end of the lock rod is removed with an extension rod, which can prevent the lock head and lock rod from rotating together.

[0004] However, in actual operation, the lock heads of lifting devices may have various shape differences (such as inverted triangles or inverted isosceles trapezoids). The existing integrated fixed limiting grooves can only be adapted to a single specification of lock head, resulting in poor tool versatility and thus increasing the burden of warehouse management. Utility Model Content

[0005] This application provides an auxiliary tooling for disassembling lifting device lock heads, which solves the technical problem of poor versatility of auxiliary tools in the prior art, leading to a heavy burden on warehouse management.

[0006] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: an auxiliary tooling for disassembling a lifting device lock head, comprising a fixed housing and two tightening screws installed on the fixed housing. The fixed housing includes a base plate, two side plates, and two end plates. The two side plates are respectively vertically fixed to the two side edges of the base plate, and the two end plates are respectively vertically fixed to the two ends of the side plates along their length, with the lower edge of the end plates flush with the upper edge of the side plates. The two side plates and the two end plates together form a cavity with a top opening. A limiting block is placed between the two side plates. The top surface of the limiting block has a limiting groove that matches the shape of the lock head. The two side walls of the limiting block fit against the inner side walls of the side plates. At least two sets of through holes are correspondingly opened on the limiting block and the side plates. Each set of through holes is fitted with a limiting screw for fixing the limiting block and the side plates. One end of the limiting screw is threadedly connected to a limiting nut. The two tightening screws are respectively threaded onto the two end plates, and one end of the tightening screw can abut against the outer circumferential surface of the lifting device lock rod.

[0007] When using this tooling, first select a suitable limiting block according to the shape of the lock head of the lifting device to be disassembled. Place the limiting block into the cavity of the fixed housing and fix it with the limiting nut through the limiting screw. Then, insert the lock head into the limiting groove of the limiting block. Next, rotate the tightening screw so that its end abuts against the locking rod. Finally, use the extension rod to remove the lock head nut. Since different specifications of limiting blocks can be replaced to adapt to various shapes of lock heads such as arc, inverted triangle, and inverted isosceles trapezoid, there is no need to equip complete tooling separately for different lock heads. Therefore, it solves the defect of existing integrated fixed limiting grooves that can only adapt to a single specification of lock head and have poor versatility, reduces the number of tooling and reduces the burden of warehouse management.

[0008] As a further improvement to the above solution, a transverse plate is fixedly connected between the upper edges of the two end plates, and the length of the transverse plate is adapted to the distance between the two end plates; thereby preventing the end plates from bending and deforming, ensuring the stability of the cavity size of the fixed housing, extending the service life of the tooling, ensuring smooth replacement of the limit block and stable limiting effect of the lock head.

[0009] As a further improvement to the above solution, both end plates are provided with through holes for the tightening screw to pass through, and tightening nuts are welded to the plate surfaces of the end plates at the positions corresponding to the through holes on the end plates; this ensures that the tightening screw and the end plates always maintain a stable threaded fit relationship.

[0010] As a further improvement to the above solution, the edges of both ends of the limiting block in the length direction are chamfered; this allows the limiting block to be quickly inserted between the two side plates and initially positioned, shortening the alignment time between the through hole of the limiting block and the through hole of the side plate, and improving the efficiency of the limiting block replacement.

[0011] As a further improvement to the above solution, a clamping block is fitted at the front end of the clamping screw. The clamping block rotates with the clamping screw and can contact the locking rod of the lifting device lock head. The clamping block can prevent the locking rod from shaking and further restrict the degree of freedom of the locking rod, ensuring that the locking rod does not move when the lock head nut is disassembled.

[0012] As a further improvement to the above solution, the clamping block includes an arc-shaped plate and a sleeve. The inner arc surface of the arc-shaped plate can contact the locking rod of the lifting device lock head, and the outer arc surface of the arc-shaped plate is fixedly connected to one end of the sleeve.

[0013] As a further improvement to the above solution, a rubber pad is fixed to the inner arc surface of the arc plate.

[0014] As a further improvement to the above solution, the limiting nut is welded and fixed to the side plate, and the axis of the limiting nut coincides with the axis of the through hole on the side plate.

[0015] As can be seen from the above technical solutions, this utility model has at least the following technical effects or advantages: When using this tooling, first select a suitable limiting block according to the shape of the lock head of the lifting device to be disassembled. Place the limiting block into the cavity of the fixed housing and fix it with the limiting nut through the limiting screw. Then, insert the lock head into the limiting groove of the limiting block. Next, rotate the tightening screw so that its end abuts against the locking rod. Finally, use the extension rod to remove the lock head nut. Since different specifications of limiting blocks can be replaced to adapt to various shapes of lock heads such as arc, inverted triangle, and inverted isosceles trapezoid, there is no need to equip complete tooling separately for different lock heads. Therefore, it solves the defect of existing integrated fixed limiting grooves that can only adapt to a single specification of lock head and have poor versatility, reduces the number of tooling and reduces the burden of warehouse management. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram illustrating the use of this utility model; Figure 2 This is a schematic diagram of the structure of the fixed shell; Figure 3 This is a schematic diagram of the limiting block. Figure 4 This is a schematic diagram of the structure of the tightening screw and the tightening block; Figure 5 This is a schematic diagram of the lifting device's lock head.

[0017] Explanation of reference numerals in the attached drawings: 1. Tightening screw, 2. Base plate, 3. Side plate, 4. End plate, 5. Limiting block, 6. Limiting groove, 7. Limiting screw, 8. Limiting nut, 9. Horizontal plate, 10. Tightening nut, 11. Chamfer, 12. Tightening block, 1201. Arc plate, 1202. Sleeve, 13. Lock head, 14. Lock rod, 15. Lock head nut. Detailed Implementation To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, other embodiments obtained by those skilled in the art without creative effort are all within the scope of protection of this patent.

[0018] This utility model discloses an auxiliary tooling for disassembling the lock head of a lifting device, such as... Figure 1 , Figure 2 , Figure 5 As shown, it includes a fixed housing and two tightening screws 1 installed on the fixed housing. The fixed housing includes a base plate 2, and side plates 3 are respectively fixed vertically on both sides of the base plate 2. The upper edges of both ends of the side plates 3 in the length direction are fixedly connected by two end plates 4. The two end plates 4 are vertically arranged, and the two tightening screws 1 are respectively installed on the two end plates 4. A cavity is formed between the two side plates 3, and a limiting block 5 is placed in the cavity. The limiting block 5 is provided with a limiting groove 6 that can be embedded and fixed to the lock head. The limiting block 5 and the side plate 3 are fixed by limiting screws 7. Both the limiting block 5 and the side plate 3 are provided with through holes. The limiting screw 7 passes through the through holes on the side plate 3 and the limiting block 5 and is engaged with a limiting nut 8.

[0019] In this embodiment, the base plate 2, side plate 3, and end plate 4 are all made of steel and welded together to form a fixed shell. The inner surfaces of the two side plates 3 are parallel to each other, and the cavity formed between them has a uniform width. At least two circular through holes are evenly opened along the length of the side plate 3 for the limit bolts to pass through and be fixed to the limit block 5.

[0020] The limiting block 5 is a replaceable component, and various specifications can be designed according to the common shape of the lifting device lock head 13. Each specification of the limiting block 5 is machined with only one limiting groove 6 that matches the shape of the corresponding lock head 13. The depth and groove size of the limiting groove 6 match the corresponding lock head 13 to ensure that the lock head 13 can be smoothly inserted without loosening. All limiting blocks 5 have the same length and thickness, and circular through holes matching the diameter of the through holes on the side plate 3 are opened on both sides along the length direction. After the limiting screw 7 passes through the through holes of the side plate 3 and the limiting block 5, the limiting nut 8 is screwed in, and after tightening, the limiting block 5 is firmly fixed to the fixed housing. In other embodiments, the limiting nut 8 can be welded to the side plate 3. When the limiting nut 8 is welded to the side plate 3, the limiting screw 8 needs to be turned when fixing the limiting block 5.

[0021] When actually carrying out the disassembly of the lifting device lock head, the specific steps are as follows: Step 1: Observe the specific shape of the lifting device lock head 13 to be disassembled, and select a limit block 5 with the same shape limit groove 6 from the spare limit block group; Step 2: Place the selected limit block 5 into the cavity of the fixed housing, manually adjust the position of the limit block 5 so that the through holes on both sides of the limit block 5 are aligned with each group of through holes of the side plate 3, insert the limit screw 7 and tighten the limit nut 8 with a wrench; Step 3: Insert the lock head 13 of the lifting device lock head vertically into the limit nut. Within the limiting groove 6 of block 5, the circumferential limiting of the lock head 13 is achieved by utilizing the shape adaptation characteristics of the limiting groove 6 and the lock head 13, thus preventing it from rotating; Step 4: Use a wrench to rotate the tightening screws 1 on the two end plates 4 respectively, so that the front end of the tightening screw 1 moves axially towards the lock rod 14 until the front end of the tightening screw 1 contacts the surface of the lock rod 14, further restricting the rotational freedom of the lock rod 14; Step 5: Sleeve the extension rod onto the hexagonal surface of the lock nut 15, and apply rotational force by means of the lever principle.

[0022] If it is necessary to disassemble the lifting device lock head 13 with different shapes of lock head, simply use a wrench to unscrew the limit nut 8 and take out the limit screw 7, and remove the old limit block 5 from the cavity of the fixed housing. There is no need to replace the entire tooling body.

[0023] The aforementioned structure, using a single fixed housing paired with multiple sets of limit blocks of different specifications, can cover the vast majority of spreader lock head models currently used in port logistics operations. Furthermore, since the weight and volume of a single limit block are significantly smaller than the fixed housing, the amount of storage space occupied by the tooling can be reduced, alleviating the burden of warehouse management.

[0024] like Figure 2As shown, a transverse plate 9 connects the two end plates 4, with both ends of the transverse plate 9 fixedly connected to the edges of the two end plates 4. Specifically, both ends of the transverse plate 9 are welded to the upper edges of the two end plates 4, thus forming a stable frame structure between the transverse plate 9 and the end plates 4. Since the limiting block 5 needs to be replaced frequently, and the cavity size of the fixed housing needs to remain stable over a long period, the transverse plate 9 can effectively resist the radial force generated by the tightening screw 1 on the end plate 4 when tightening the locking rod 14, preventing the end plate 4 from bending and deforming.

[0025] Furthermore, both end plates 4 are provided with through holes for the tightening screw 1 to pass through, and the diameter of the through holes on the end plates 4 is slightly larger than the outer diameter of the tightening screw 1. Tightening nuts 10 are welded to the plate surfaces of the end plates 4 at positions corresponding to the through holes. When different specifications of the limiting blocks 5 are adapted to different shapes of lock heads 13, by finely adjusting the extension length of the tightening screw 1, it can be ensured that the front end of the tightening screw 1 can always contact the surface of the lock rod 14. Therefore, regardless of which specification of the limiting block 5 is replaced, reliable fixing of the lock rod 14 can be achieved.

[0026] like Figure 3 As shown, the limiting block 5 is also provided with a chamfer 11. The chamfer 11 is formed on the upper and lower edges and left and right edges of the end faces of both ends of the limiting block 5 in the length direction. When the limiting block 5 is placed into the cavity of the fixed housing, the chamfer 11 can play a guiding role, avoiding the edges of the limiting block 5 from bumping and getting stuck with the cavity entrance of the side plate 3, so that the limiting block 5 can be quickly inserted laterally between the two side plates, thereby shortening the alignment time between the through hole of the limiting block 5 and the through hole of the side plate 3.

[0027] like Figure 4 As shown, a tightening block 12 is fitted to the front end of the tightening screw 1. The tightening block 12 is rotatably engaged with the tightening screw 1 and can contact the locking rod 14 of the lifting device lock head. The tightening block 12 includes an arc-shaped plate 1201 and a sleeve 1202. The inner arc surface of the arc-shaped plate 1201 can contact the locking rod 14 of the lifting device lock head, and the outer arc surface of the arc-shaped plate 1201 is fixedly connected to one end of the sleeve 1202. A rubber pad is fixed to the inner arc surface of the arc-shaped plate 1201. Specifically, the inner arc radius of the arc-shaped plate 1201 is adapted to the outer diameter of the common locking rod 14, and the surface of the inner arc surface is rough to ensure a tight fit with the surface of the locking rod 14. One end of the sleeve 1202 is welded and fixed to the center position of the outer arc surface of the arc-shaped plate 1201, and the axis of the sleeve 1202 is collinear with the center of the inner arc surface of the arc-shaped plate 1201. It should be understood that the front end of the tightening screw 1 is also machined to form a circular boss, and the inner diameter of the sleeve 1202 can be clearance-fitted with the outer diameter of the boss, thereby ensuring that the tightening block 12 can rotate flexibly around the axis of the tightening screw 1.

[0028] The rubber pad is made of wear-resistant rubber, and its size matches the inner arc surface of the arc plate 1201. The rubber pad can increase the static friction coefficient between the clamping block 12 and the locking rod 14, avoiding slippage caused by the diameter difference of the locking rod 14 or slight surface corrosion, and ensuring that the locking rod 14 is reliably fixed; at the same time, the rotational cooperation between the clamping block 12 and the clamping screw 1 allows the arc plate 1201 to automatically adjust its fitting posture according to the axial angle of the locking rod 14.

[0029] In the description of this utility model, the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for describing this utility model and do not require that this utility model be constructed or operated in a specific orientation, and therefore should not be construed as limiting this utility model. The terms "connected" and "linked" in this utility model should be interpreted broadly. For example, they can refer to a connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0030] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in its embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. An auxiliary tooling for disassembling a lifting device lock head, comprising a fixed housing and two tightening screws (1) mounted on the fixed housing, characterized in that, The fixed housing includes a base plate (2), two side plates (3) and two end plates (4). The two side plates (3) are respectively vertically fixed to the two sides of the base plate (2), and the two end plates (4) are respectively vertically fixed to the two ends of the side plates (3) along their length. The lower edge of the end plate (4) is flush with the upper edge of the side plate (3). The two side plates (3) and the two end plates (4) together form a cavity with a top opening. A limiting block (5) is placed between the two side plates (3). The top surface of the limiting block (5) has an opening that allows it to engage with the lock head ( 13) A matching groove (6) is provided. The two side walls of the limiting block (5) are fitted with the inner side wall of the side plate (3). At least two sets of through holes are provided on the limiting block (5) and the side plate (3). Each set of through holes is provided with a limiting screw (7) for fixing the limiting block (5) and the side plate (3). One end of the limiting screw (7) is threadedly connected to a limiting nut (8). The two tightening screws (1) are respectively threaded on the two end plates (4). One end of the tightening screw (1) can abut against the outer circumferential surface of the lifting lock rod (14).

2. The auxiliary tooling for disassembling the lock head of a lifting device according to claim 1, characterized in that, A transverse plate (9) is fixedly connected between the upper edges of the two end plates (4), and the length of the transverse plate (9) is adapted to the distance between the two end plates (4).

3. The auxiliary tooling for disassembling the lock head of a lifting device according to claim 2, characterized in that, Both end plates (4) are provided with through holes for the tightening screw (1) to pass through, and tightening nuts (10) are welded to the plate surface of the end plate (4) at the positions corresponding to the through holes on the end plate (4).

4. The auxiliary tooling for disassembling the lock head of a lifting device according to claim 1, characterized in that, The edges of both ends of the limiting block (5) in the length direction are chamfered (11).

5. The auxiliary tooling for disassembling the lock head of a lifting device according to claim 1, characterized in that, The front end of the tightening screw (1) is equipped with a tightening block (12), which rotates with the tightening screw (1) and can contact the locking rod of the lifting device lock head.

6. The auxiliary tooling for disassembling the lock head of a lifting device according to claim 5, characterized in that, The clamping block (12) includes an arc plate (1201) and a sleeve (1202). The inner arc surface of the arc plate (1201) can contact the locking rod of the lifting device lock head, and the outer arc surface of the arc plate (1201) is fixedly connected to one end of the sleeve (1202).

7. The auxiliary tooling for disassembling the lock head of a lifting device according to claim 6, characterized in that, A rubber pad is fixed to the inner arc surface of the arc plate (1201).

8. The auxiliary tooling for disassembling the lock head of a lifting device according to claim 1, characterized in that, The limiting nut (8) is welded and fixed to the side plate (3), and the axis of the limiting nut (8) coincides with the axis of the through hole on the side plate (3).

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