Quick adjustment locking device for chains

Abstract

The application relates to a quick adjusting and locking device for a chain, which comprises an adjusting assembly, a chain sleeve assembly and a connecting lug assembly, the adjusting assembly comprises an adjusting hand wheel and an adjusting screw, the two ends of the adjusting screw are provided with left-handed external threads and right-handed external threads, the right end of the chain sleeve assembly is provided with right-handed internal threads matched with the left-handed external threads, the left end of the connecting lug assembly is provided with left-handed internal threads matched with the right-handed external threads, the left end of the chain sleeve assembly comprises a lock body, the outer side of the lock body is provided with a transversely-extending cylindrical lock head, the upper surface of the cylindrical lock head is provided with a first U-shaped groove with an upward opening, the bottom of the first U-shaped groove is provided with a first cutout, the outer side of the cylindrical lock head is assembled with a limiting cover, the outer circumferential surface of the limiting cover is provided with limiting holes, the limiting holes are provided with rolling balls, and the outer circumferential surface of the cylindrical lock head is provided with an annular clamping groove. The application provides a quick pre-tightening locking adjusting structure with anti-falling and anti-loosening functions, which can effectively guarantee the safety of ships, vehicles and other carriers carrying various products and equipment.

Description

Technical Field

[0001] This invention relates to the field of chain lock technology, and in particular to a chain lock quick adjustment and locking device. Background Technology

[0002] When ships and vehicles transport various products and equipment, they must be secured and pre-tensioned to prevent unforeseen accidents such as cargo swaying, slipping, and overturning caused by road bumps or waves during ship navigation, thus ensuring the safety of goods and personnel. Chain adjustment and locking consists of coarse adjustment and fine adjustment stages. Most existing chain adjustment and locking devices separate coarse and fine adjustment pre-tensioning. Coarse adjustment mainly uses tools such as hooks and chain adjusters. Fine adjustment mainly uses tools such as turnbuckles and handle-type pre-tensioners (i.e., tensioners). These operations must be performed separately, making simultaneous operation impossible, and the adjustment is inconvenient, slow, and inefficient. Summary of the Invention

[0003] In response to the technical problems mentioned in the background, the present invention proposes a chain fast adjustment and locking device that combines coarse adjustment and fine adjustment, and has a fast adjustment speed and high efficiency.

[0004] To achieve the above objectives, the present invention provides a chain quick adjustment and locking device, comprising an adjustment component, a chain sleeve component, and a connecting ear component;

[0005] The adjustment assembly includes an adjustment handwheel and an adjustment screw;

[0006] The adjusting handwheel is riveted to the middle part of the adjusting screw;

[0007] The adjusting screw has a left-hand external thread and a right-hand external thread at its two ends, respectively;

[0008] The right end of the chain sleeve assembly is provided with a right-hand internal thread that mates with the left-hand external thread;

[0009] The left end of the connecting ear assembly is provided with a left-hand internal thread that engages with the right-hand external thread;

[0010] The left end of the chain sleeve assembly includes a lock body;

[0011] The lock body is provided with a first groove;

[0012] The chain ring A can be locked into the first groove;

[0013] The lock body has a horizontally extending cylindrical lock head on its outer side;

[0014] The cylindrical lock head has a first U-shaped groove with the opening facing upward on its upper surface;

[0015] The first U-shaped groove is adapted to the shape of the chain ring A;

[0016] The bottom of the first U-shaped groove is provided with a vertically arranged first cut;

[0017] The waist of the chain link B is secured within the first cut;

[0018] A limit cover is fitted on the outside of the cylindrical lock head;

[0019] The end face of the limiting cover is provided with a second U-shaped groove with an upward opening that is adapted to the shape of the first U-shaped groove;

[0020] The outer circumferential surface of the limiting cover is provided with a limiting hole;

[0021] The limiting hole is equipped with a ball bearing;

[0022] The outer circumferential surface of the cylindrical lock head is provided with an annular groove that matches the size and position of the ball bearing;

[0023] The ball bearing can slide along the annular groove to control the opening and closing of the limiting cover and the lock head.

[0024] Furthermore, a limiting plate is assembled between the lock head and the limiting cover; the limiting plate is adapted to the shape of the outer end face of the cylindrical lock head and is fixedly assembled to the outer end face of the cylindrical lock head by a positioning member; the upper surface of the limiting plate is provided with a third U-shaped groove; the third U-shaped groove is consistent with the shape of the first U-shaped groove; the bottom of the third U-shaped groove is provided with a second cut consistent with the shape of the first cut; the limiting plate is provided with an elastic positioning member for engaging with the limiting cover.

[0025] Furthermore, the elastic positioning component includes a positioning shaft, a first compression spring, a first positioning hole, and a second positioning hole; the first positioning hole is disposed on the surface of the limiting plate; the second positioning hole is correspondingly disposed on the outer end face of the lock head; the end of the positioning shaft and the first compression spring are sequentially inserted into the first positioning hole and the second positioning hole; the front end of the positioning shaft is provided with a hemispherical shaft cap; the hemispherical shaft cap cooperates with a third positioning hole located on the inner end face of the limiting cover; when the limiting cover is rotated to the position where the slot opening faces downward, the hemispherical shaft cap is engaged in the third positioning hole.

[0026] Furthermore, it also includes a fastening assembly for limiting the rotation of the adjusting handwheel; the fastening assembly includes a pin seat; the pin seat is fixed to the bottom of the lock body near the adjusting handwheel; the pin seat has a through first pin hole; the adjusting handwheel has a plurality of second pin holes that cooperate with the first pin hole; the first pin hole has a cylindrical pin rod and a second compression spring; a pull ring is installed at the end of the pin rod away from the adjusting handwheel.

[0027] Furthermore, the pin seat is provided with a deep groove and a shallow groove at one end of the pull ring, which are connected to the pin hole; the deep groove and the shallow groove are arranged in a crisscross pattern.

[0028] Furthermore, each end of the adjusting screw is equipped with an elastic limiting pin.

[0029] Furthermore, the right end of the connecting ear is provided with symmetrical protrusions; bolts and anti-loosening nuts are connected between the protrusions.

[0030] Furthermore, the connecting lug and the lock body are provided with an adjustment groove at one end near the adjustment screw for observing the rotational position of the adjustment screw.

[0031] Compared with existing technologies, the advantages of this invention are as follows: The chain quick adjustment and locking device provided by this invention integrates the coarse and fine pre-tightening functions of chain adjustment. It uses a chain sleeve assembly to lock and fix the slack portion of the chain, achieving the coarse adjustment function. Fine adjustment of the chain is achieved by rotating the adjustment handwheel left and right to adjust the distance between the adjustment screw and the chain sleeve assembly and connecting lug assembly, ultimately reaching pre-tightening and locking. This invention provides a quick pre-tightening and locking adjustment structure with anti-derailment and anti-loosening features. As an important component of rigging, it effectively ensures the safety of ships, vehicles, and other vessels carrying various products and equipment. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the chain quick adjustment and locking device of the present invention;

[0033] Figure 2 This is an exploded view of the chain quick-adjustment locking device of the present invention;

[0034] Figure 3 This is an axial cross-sectional schematic diagram of the chain quick adjustment and locking device of the present invention;

[0035] Figure 4 This is a diagram showing the usage state of the chain quick adjustment and locking device of the present invention;

[0036] Figure 5 This is a schematic diagram of the overall structure of the chain sleeve assembly of the present invention;

[0037] Among them, 100-adjustment component, 200-chain sleeve component, 300-connecting ear component, 400-fastening component,

[0038] 101-Adjusting handwheel, 102-Adjusting screw, 103-Second pin hole, 104-Elastic limit pin, 105-Rivet

[0039] 210-Lock body, 211-First groove,

[0040] 220 - Cylindrical lock head, 221 - First U-shaped groove, 222 - First notch, 223 - Annular groove, 224 - Second positioning hole

[0041] 230 - Limiting cap, 231 - Second U-shaped groove, 232 - Limiting hole, 233 - Ball bearing, 234 - Third positioning hole, 235 - Set screw

[0042] 240 - Limiting plate, 241 - Third U-shaped groove, 242 - Second cut, 243 - First positioning hole

[0043] 250-positioning parts,

[0044] 260 - Elastic positioning element, 261 - Positioning shaft, 262 - First compression spring, 263 - Hemispherical cap,

[0045] 301 - Convex plate, 302 - Bolt, 303 - Anti-loosening nut

[0046] 401-Pin seat, 402-First pin hole, 403-Pin rod, 404-Second compression spring, 405-Pull ring, 406-Deep slot, 407-Shallow slot. Detailed Implementation

[0047] The following description, with reference to the accompanying drawings, is provided to facilitate understanding of the technical solutions of the present invention by those skilled in the art. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention.

[0048] In the following detailed description, numerous specific details are set forth for ease of explanation to provide a full understanding of embodiments of the invention. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of the invention.

[0049] like Figure 1-4The diagram shows the overall structure of the chain quick-adjustment locking device of the present invention. This embodiment mainly includes components such as an adjustment assembly 100, a chain sleeve assembly 200, and a connecting ear assembly 300. The adjustment assembly 100 includes an adjustment handwheel 101 and an adjustment screw 102. The adjustment handwheel 101 is riveted to the middle part of the adjustment screw 102 by rivets 105. The two ends of the adjustment screw 102 are respectively provided with a left-hand external thread and a right-hand external thread. Meanwhile, the right end of the chain sleeve assembly 200 is provided with a right-hand internal thread that engages with the left-hand external thread, and the left end of the connecting ear assembly 300 is provided with a left-hand internal thread that engages with the right-hand external thread. The right end of the connecting ear assembly 300 is provided with symmetrical protrusions 301, and bolts 302 and anti-loosening nuts 303 are connected between the protrusions 301.

[0050] In this embodiment, the distance between the adjusting screw and the chain sleeve assembly and connecting ear assembly is achieved by rotating the adjusting handwheel left and right. The forward and reverse rotation of the adjusting handwheel can achieve the purpose of fine adjustment of the chain length within a certain range.

[0051] like Figure 5 As shown, in this embodiment, the left end of the chain assembly 200 includes a lock body 210, and a first groove 211 is provided inside the lock body 210. The chain loop A can be locked in the first groove 211. A horizontally extending cylindrical lock head 220 is provided on the outside of the lock body 210. The upper surface of the cylindrical lock head 220 has an upward-facing first U-shaped groove 221, which is adapted to the shape of the chain loop A. The bottom of the first U-shaped groove 221 has a vertically arranged first cut 222, and the waist of the chain vertical loop B is locked in the first cut 222, thereby locking the tightly connected loops and vertical loops on the chain. A limiting cover 230 is fitted on the outside of the cylindrical lock head 220. The end face of the limiting cover 230 has a second U-shaped groove 231 with an upward opening that matches the shape of the first U-shaped groove 221. A limiting hole 232 is provided on the outer circumferential surface of the limiting cover 230, and a ball bearing 233 is disposed within the limiting hole 232. During installation, the ball bearing 233 is secured within the hole by a set screw 235. An annular groove 223, matching the size and position of the ball bearing 233, is provided on the outer circumferential surface of the cylindrical lock head 220. The ball bearing 233 and the annular groove 223 achieve a clearance fit. The ball bearing 233 can slide along the annular groove 223, and when the limiting cover rotates, it controls the opening and closing of the limiting cover 230 and the cylindrical lock head 220.

[0052] In this embodiment, the chain sleeve assembly 200 is used to lock and fix the slack part of the chain, thereby realizing the coarse adjustment function of the chain.

[0053] In this embodiment, a limiting plate 240 is assembled between the cylindrical lock head 220 and the limiting cover 230. The limiting plate 240 is adapted to the shape of the outer end face of the cylindrical lock head 220 and is fixedly assembled to the outer end face of the cylindrical lock head 220 by a positioning member 250. In specific implementation, the positioning member 250 can be a countersunk screw. The upper surface of the limiting plate 240 is provided with a third U-shaped groove 241, and the third U-shaped groove 241 has the same shape as the first U-shaped groove 221. The bottom of the third U-shaped groove 241 is provided with a second cut 242 that has the same shape as the first cut 222. The third U-shaped groove 241 and the second cut 242 are used to engage the horizontal ring A and the vertical ring B of the lock chain, respectively. At the same time, the limiting plate 240 is provided with an elastic positioning member 260 for engaging with the limiting cover 230.

[0054] In specific implementation, the elastic positioning component 260 includes a positioning shaft 261, a first compression spring 262, a first positioning hole 243, and a second positioning hole 224. The first positioning hole 243 is located on the surface of the limiting plate 240, and the second positioning hole 224 is correspondingly located on the outer end face of the cylindrical lock head 220. The end of the positioning shaft 261 and the first compression spring 262 are sequentially inserted into the first positioning hole 243 and the second positioning hole 224. A hemispherical cap 263 is provided at the front end of the positioning shaft 261. The hemispherical cap 263 is clearance-fitted with the third positioning hole 234 located on the inner end face of the limiting cover 230. When the limiting cover 230 is rotated to the point where the opening of the second U-shaped groove 231 faces downward, the hemispherical cap 263 is just locked in the third positioning hole 234. When a certain amount of force is applied again to rotate the limiting cover 230, the hemispherical cap 263 slides out of the third positioning hole 234 under the action of the rotational force, thereby unlocking the device.

[0055] In this embodiment, during specific operation, the limiting cover is rotated until the opening of the second U-shaped groove 231 aligns with the U-shaped opening of the limiting plate 240 and the cylindrical lock head 220. Then, the chain is straightened and inserted into the first groove 211 along the U-shaped opening. The limiting cover 230 is rotated back again, so that the opening of the second U-shaped groove 231 faces downward, and the third U-shaped groove 241 of the limiting plate 230 and the first U-shaped groove 221 of the cylindrical lock head 220 are closed. At the same time, the positioning shaft 261 is embedded into the third positioning hole 234 by the elastic force of the first compression spring 262, achieving limiting and locking, thereby ensuring that the limiting cover is locked after being rotated to the correct position and the chain will not come out.

[0056] In this embodiment, the chain length is coarsely adjusted by the cooperation of the limiting cover 230, the limiting plate 240 and the cylindrical lock head 220, and then the chain length is finely adjusted by rotating the cylindrical lock head 220 left and right to achieve the purpose of pre-tightening or loosening.

[0057] In some embodiments, the chain quick-adjustment locking device also includes a latching assembly 400 for limiting the rotation of the adjusting handwheel 101. Specifically, the latching assembly 400 includes a pin seat 401, which is fixed to the bottom of the lock body 210 near the adjusting handwheel 101. The pin seat 401 has a through first pin hole 402, and the adjusting handwheel 101 has multiple second pin holes 103 that mate with the first pin hole 402. A cylindrical pin rod 403 and a second compression spring 404 are provided within the first pin hole 402. A pull ring 405 is installed at the end of the pin rod 403 away from the adjusting handwheel 101. When the adjusting handwheel 101 is rotated to its position, the pin rod 403 is inserted into the corresponding second pin hole 103 to limit the rotation of the adjusting handwheel 101 and ensure adjustment accuracy.

[0058] In some embodiments, the pin seat 401 has a deep groove 406 and a shallow groove 407 at one end of the pull ring 405, which are connected to the first pin hole 402. The deep groove 406 and the shallow groove 407 are arranged alternately. When it is necessary to fix the adjusting handwheel 101, the pin rod 403 is inserted into the second pin hole 103, and the end of the pull ring 405 is engaged in the deep groove 406. When the adjusting handwheel 101 is released, the end of the pull ring 405 is engaged in the shallow groove 407 to prevent the pin rod 403 from sliding.

[0059] In some embodiments, elastic limiting pins 104 are respectively fitted at both ends of the adjusting screw 102 to prevent the adjusting screw 102 from slipping out. Meanwhile, the connecting lug assembly 300 and the lock body 210 have an adjusting groove at the end near the adjusting screw 102 for observing the rotational position of the adjusting screw 102.

[0060] In specific operation, when the preload is appropriate, the pull ring 405 is pulled out from the shallow groove 407 at the end of the pin seat 401. After rotating a certain angle, the pull ring enters the deep groove 406, and at the same time, the pin rod 403 is inserted into the second pin hole 103 of the adjusting handwheel. The second compression spring 404 tensions the pin rod 403, thereby achieving fine-tuning locking of the quick adjustment structure. The adjusting handwheel 101 cannot rotate, ensuring that the thread length of the adjusting screw 102 remains unchanged under external force interference, and the preload value remains unchanged.

[0061] This invention provides a fast pre-tightening and locking adjustment structure with anti-loosening and anti-slip features. As an important component of rigging, it effectively ensures the safety of ships, vehicles, and other vessels carrying various products and equipment. Furthermore, this invention features short operation time, integrates coarse and fine adjustment, is lightweight, and has safe and reliable locking and securing functions.

[0062] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A quick adjustment locking device for a chain, comprising: The adjusting assembly (100), the chain cover assembly (200) and the connecting lug assembly (300) are provided. The adjusting assembly (100) comprises an adjusting hand wheel (101) and an adjusting screw rod (102). The adjusting hand wheel (101) is riveted at the middle part of the adjusting screw rod (102). The two ends of the adjusting screw rod (102) are respectively provided with left-handed external threads and right-handed external threads. The right end of the chain cover assembly (200) is provided with right-handed internal threads matched with the left-handed external threads. The left end of the connecting lug assembly (300) is provided with left-handed internal threads matched with the right-handed external threads. The left end of the chain cover assembly (200) comprises a lock body (210). The lock body (210) is internally provided with a first groove (211). The lock chain lying ring A is integrally clamped in the first groove (211). The lock body (210) is externally provided with a transversely extending cylindrical lock head (220). The upper surface of the cylindrical lock head (220) is provided with a first U-shaped groove (221) with an upward opening. The first U-shaped groove (221) is matched with the shape of the lock chain lying ring A. The bottom of the first U-shaped groove (221) is provided with a first cutout (222) arranged vertically. The waist of the lock chain vertical ring B is clamped into the first cutout (222). The outer side of the cylindrical lock head (220) is assembled with a limiting cover (230). The end surface of the limiting cover (230) is provided with a second U-shaped groove (231) with an upward opening and matched with the shape of the first U-shaped groove (221). The outer circumferential surface of the limiting cover (230) is provided with a limiting hole (232). The limiting hole (232) is internally provided with a ball (233). The outer circumferential surface of the cylindrical lock head (220) is provided with an annular clamping groove (223) matched with the size and position of the ball (233). The ball (233) can slide along the annular clamping groove (223) to control the opening and closing of the limiting cover (230) and the cylindrical lock head (220).

2. The quick-adjust locking device of claim 1, wherein, The limiting cover (230) and the limiting plate (240) are assembled between the cylindrical lock head (220) and the limiting cover (230). The limiting plate (240) is matched with the shape of the outer end surface of the cylindrical lock head (220) and is fixedly assembled on the outer end surface of the cylindrical lock head (220) through a positioning member (250). The upper surface of the limiting plate (240) is provided with a third U-shaped groove (241). The third U-shaped groove (241) is consistent with the shape of the first U-shaped groove (221). The bottom of the third U-shaped groove (241) is provided with a second cutout (242) consistent with the shape of the first cutout (222). The limiting plate (240) is provided with an elastic positioning member (260) for clamping with the limiting cover (230).

3. The quick-adjust locking device of claim 2, wherein, The elastic positioning member (260) comprises a positioning shaft (261), a first compression spring (262), a first positioning hole (243) and a second positioning hole (224); the first positioning hole (243) is arranged on the plate surface of the limiting plate (240); the second positioning hole (224) is correspondingly arranged on the outer end surface of the cylindrical lock head (220); the tail end of the positioning shaft (261) is sequentially arranged in the first positioning hole (243) and the second positioning hole (224) with the first compression spring (262); the front end of the positioning shaft (261) is provided with a hemispherical shaft cap (263); the hemispherical shaft cap (263) is matched with a third positioning hole (234) on the inner end surface of the limiting cover (230); when the limiting cover (230) is rotated to the second U-shaped groove (231) opening downward, the hemispherical shaft cap (263) is clamped into the third positioning hole (234).

4. The quick-adjust locking device of claim 3, wherein, The locking assembly (400) further comprises a latch seat (401); the latch seat (401) is fixed on the bottom of the lock body (210) near one side of the adjusting hand wheel (101); the latch seat (401) is provided with a first latch hole (402) penetrating through; the adjusting hand wheel (101) is provided with a plurality of second latch holes (103) matched with the first latch hole (402); the first latch hole (402) is provided with a cylindrical latch rod (403) and a second compression spring (404); the end of the latch rod (403) away from the adjusting hand wheel (101) is provided with a pull ring (405).

5. The quick-adjust locking device of claim 4, wherein, The latch seat (401) is provided with a deep clamping groove (406) and a shallow clamping groove (407) connected with the first latch hole (402) at one end of the pull ring (405); the deep clamping groove (406) and the shallow clamping groove (407) are arranged in cross.

6. The quick-adjust locking device of claim 5, wherein, The two ends of the adjusting screw rod (102) are respectively provided with elastic limiting latches (104).

7. The quick-adjust locking device of claim 6, wherein, The right end of the connecting lug assembly (300) is provided with symmetrical convex plates (301); the connecting lug assembly (300) and the lock body (210) are provided with adjusting grooves near one end of the adjusting screw rod (102) for observing the rotating position of the adjusting screw rod (102).

8. The quick-adjust locking device of claim 7, wherein, The right end of the connecting lug assembly (300) is provided with symmetrical convex plates (301); the connecting lug assembly (300) and the lock body (210) are provided with adjusting grooves near one end of the adjusting screw rod (102) for observing the rotating position of the adjusting screw rod (102).

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