Telescopic large-stroke clamping buckle

Abstract

The invention provides a telescopic large-stroke clamping buckle, and belongs to the technical field of connecting pieces. The telescopic mechanism is arranged between the hook and the pull rod connected with the handle, the telescopic mechanism is provided with the telescopic main body and the ratchet wheel assembly, the telescopic main body is connected with the pull rod, and the ratchet wheel assembly is installed in the telescopic main body and comprises the ratchet wheel poking piece and the pressing piece; one end of the hook is arranged on the telescopic main body in a sliding mode and provided with sawteeth corresponding to the ratchet wheel poking piece, when the handle deflects, the telescopic main body can be pulled through the pull rod to move relative to the hook, so that the hook can automatically retract under the action of the ratchet wheel assembly, and manual extension is achieved when the pressing piece is pressed downwards; the ratchet wheel assembly can achieve multiple times of automatic retraction of the hook, so that the action length of the clamping buckle can be adjusted, meanwhile, clamping forming and clamping force adjusting can be achieved, the structural flexibility is higher, adaptability is better, and using limitation is smaller.

Description

Technical Field

[0001] The invention relates to the technical field of connecting pieces, in particular to a retractable large-stroke clamping buckle. Background Art

[0002] With the rapid development of the logistics industry, its logistics and transportation equipment has also received attention. For example, express delivery vehicles equipped with cages use cages to store and transport various express parcels, and cage racks are used to load or unload cages from express delivery vehicles. When in use, logistics personnel will load the entire cage on the cage rack, and then transfer the cage to the express delivery vehicle through the cage rack. Therefore, achieving a stable connection between the cage and the cage rack is the key to ensuring the normal operation of logistics.

[0003] At present, the market generally adopts a lever-type clamping buckle to realize the stable connection between the cage box and the cage frame, wherein one end of the handle is hinged on the fixed carrier, the middle part of the handle is hinged on one end of a pull rod, the other end of the pull rod is provided with a hook, and there is a gap between the end of the handle hinged on the fixed carrier and the fixed carrier to form an anti-loosening dead point, so that after the handle is deflected and passes the anti-loosening dead point, it can be locked, thereby maintaining the hook state. In addition, when the above-mentioned lever-type clamping mouth is used in the occasion where the cage box is fixed on the cage frame, one end of the handle is directly hinged on the fixed carrier on the cage frame, and the hook hooks the cage box. The operator only needs to deflect the handle and pass the anti-loosening dead point, and the hook can stably lock the cage box on the cage frame to meet the use requirements. However, the structure of the existing lever-type clamping buckle is a fixed structure, that is, the size and matching form of the handle, pull rod and hook cannot be changed during use, so that the overall action length cannot be adjusted, the clamping stroke and clamping force cannot be changed, the adaptability is poor, and the use restrictions are large. In addition, since the cage is heavy when filled with express parcels, usually reaching about 1 ton, when logistics personnel move the cage, problems such as jamming and deformation may occur, resulting in a misfit between the cage and the cage frame, and the clamping buckle used must also be able to adaptively adjust the action length, clamping stroke and clamping force requirements, and the above-mentioned existing lever-type clamping buckle obviously cannot meet the usage requirements. Summary of the invention

[0004] In view of the above-mentioned problems existing in the prior art, the present invention aims to provide a retractable large-stroke clamping buckle, by setting a telescopic mechanism between the pull rod and the hook, so as to realize the adjustment of the effective length. At the same time, the telescopic mechanism is realized by a ratchet structure, which can automatically retract and manually extend. The clamping stroke and the clamping force can be adjusted by repeatedly swinging the handle. The structure has higher flexibility, better adaptability and less usage restrictions.

[0005] The specific technical solutions are as follows: A telescopic large-stroke clamping buckle comprises a fixed carrier, an articulated seat, a handle, a pull rod and a hook, wherein the articulated seat is mounted on the fixed carrier, one end of the handle is hinged on the articulated seat, one end of the pull rod is hinged to the middle of the handle, and the other end of the pull rod is provided with a hook, and has such a feature that a telescopic mechanism is provided between the hook and the pull rod; In addition, the telescopic mechanism includes a telescopic body and a ratchet assembly, and the ratchet assembly includes a ratchet paddle, a pressing piece and a reset elastic piece. The telescopic body is installed on one end of the pull rod connected to the hook, and a telescopic guide groove is provided on the telescopic body. One end of the hook is slidably set in the telescopic guide groove, and a plurality of serrations are provided on the outer wall of the end of the hook that cooperates with the telescopic guide groove along its length direction. At the same time, the middle part of the ratchet paddle is hinged to the telescopic body, one end of the ratchet paddle is provided with a ratchet and cooperates with the serrations on the hook, and a reset elastic piece is provided between one end of the ratchet paddle provided with a ratchet and located away from the ratchet and the telescopic body. A pressing piece is also provided on the telescopic body, and the pressing piece abuts against the other end of the ratchet paddle and located away from the side where the ratchet is set.

[0006] The above-mentioned retractable large-stroke clamping buckle, wherein the two sides of each saw tooth are respectively a steep side and a gentle side, the angle between the steep side and the telescopic direction of the hook is greater than the angle between the gentle side and the telescopic direction of the hook, and the two sides of each ratchet tooth are also respectively a gentle side and a steep side, and the gentle side and steep side of the ratchet tooth respectively cooperate with the gentle side and steep side of the corresponding saw tooth.

[0007] The above-mentioned telescopic large-stroke clamping buckle, wherein the telescopic main body is box-shaped, including a telescopic box and a box cover, the telescopic box has an installation cavity, one end of the telescopic box is connected to the end of the pull rod away from the handle, the box cover is installed at the cavity opening of the installation cavity of the telescopic box, and the telescopic guide groove, ratchet paddle, and reset elastic member are all installed in the installation cavity.

[0008] The above-mentioned telescopic large-stroke clamping buckle, wherein two baffles are arranged in the telescopic body, the two baffles are arranged along the length direction of the pull rod, and the two baffles are arranged in parallel and spaced apart, and the interval between the two baffles constitutes a telescopic guide groove.

[0009] The above-mentioned telescopic large-stroke clamping buckle, wherein two groups of ratchet assemblies are provided, and the two groups of ratchet assemblies are symmetrically arranged on both sides of the telescopic guide groove. At the same time, the ratchet teeth on the two ratchet paddles in the two groups of ratchet assemblies are arranged relatively, and the serrations at one end of the hook are located on both sides of the hook and respectively cooperate with the ratchet teeth of the two groups of ratchet assemblies.

[0010] The above-mentioned telescopic large-stroke clamping buckle, wherein a hook is slidably arranged at one end in the telescopic guide groove, and a strip-shaped guide limit hole is opened along the length direction of the telescopic guide groove, and a guide limit column is installed on the telescopic body, and the guide limit column is inserted into the guide limit hole.

[0011] The above-mentioned retractable large-stroke clamping buckle, wherein a clamping sleeve is spaced apart on the fixed carrier and located on the side of the hinged seat away from the hook, and the clamping sleeve has an annular clamping groove with an opening, and the opening of the annular clamping groove is smaller than the maximum width of the handle, and the inner contour of the annular clamping groove is consistent with the outer contour of the handle.

[0012] In the above-mentioned telescopic large-stroke clamping buckle, two pull rods are provided, the two pull rods are respectively connected to the two sides of the telescopic body, and the other ends of the two pull rods are respectively hinged to the two sides of the middle part of the handle.

[0013] The above-mentioned telescopic large-stroke clamping buckle, wherein the pressing part includes a pressing rod and a button, the pressing rod is arranged in a "T" shape, a pressing hole is opened on the side wall of the telescopic body, the large head end of the pressing rod is located in the telescopic body and one end is against the end of the ratchet paddle, the small head end of the pressing rod passes through the pressing hole and extends to the outside of the telescopic body, and the button is installed on the end of the pressing rod extending out of the telescopic body.

[0014] The above-mentioned retractable large-stroke clamping buckle, wherein the reset elastic member is a columnar spring, and at the same time, an embedding hole is opened on the end of the ratchet paddle corresponding to the reset elastic member, one end of the reset elastic member is inserted into the embedding hole, and the reset elastic member is always in a compressed state.

[0015] The above-mentioned telescopic large-stroke clamping buckle, wherein the telescopic box and the box cover are locked by connecting screws.

[0016] The positive effects of the above technical solution are: The above-mentioned retractable large-stroke clamping buckle is provided with a retractable mechanism between the hook and the pull rod connected to the handle, and the retractable mechanism includes a retractable body and a ratchet assembly, the retractable body is connected to the pull rod, and the ratchet assembly is installed in the retractable body, and at the same time, the ratchet assembly includes a ratchet paddle with ratchet teeth and a pressing member for pressing to drive the ratchet paddle to deflect, and a saw tooth is provided at one end of the hook and extends into the retractable body to cooperate with the ratchet teeth. The retractable body is driven to move relative to the hook by the deflection of the handle, so that the hook can automatically retract under the action of the ratchet assembly, and the retraction stroke is proportional to the swing frequency of the handle. In addition, after pressing the pressing member downward, the ratchet can be disengaged from the saw tooth, and the hook can be pulled out in the reverse direction, thereby realizing manual extension of the hook, thereby satisfying the adjustable action length of the clamping buckle, and also realizing the adjustable clamping stroke and clamping force, with a more flexible structure, better adaptability and fewer usage restrictions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of an embodiment of a retractable large-stroke clamping buckle of the present invention; Figure 2 An exploded view of an embodiment of a retractable large-stroke clamping buckle of the present invention; Figure 3 It is a schematic diagram of the coordination of a hook and a telescopic mechanism of a telescopic large-stroke clamping buckle of the present invention; Figure 4 This is a reference diagram for the use of a retractable large-stroke clamping buckle of the present invention.

[0018] In the accompanying drawings: 1. fixed carrier; 2. hinged seat; 3. handle; 4. pull rod; 5. hook; 51. sawtooth; 52. guide limit hole; 511. steep edge; 512. gentle edge; 6. telescopic mechanism; 61. telescopic body; 62. ratchet assembly; 63. baffle; 64. guide limit column; 611. telescopic box; 612. box cover; 621. ratchet paddle; 622. pressing piece; 623. resetting elastic piece; 624. telescopic guide groove; 6211. ratchet; 6212. embedded hole; 6221. pressing rod; 6222. button; 7. clamping sleeve. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the following embodiments are combined with the attached Figure 1 To Attachment Figure 4 The technical solution provided by the present invention is described in detail, but the following content is not intended to limit the present invention.

[0020] Figure 1 It is a structural diagram of an embodiment of a retractable large-stroke clamping buckle of the present invention; Figure 2 An exploded view of an embodiment of a retractable large-stroke clamping buckle of the present invention; Figure 3 The figure is a schematic diagram of the coordination of a hook and a telescopic mechanism of a telescopic large-stroke clamping buckle of the present invention. Figure 1 , Figure 2 as well as Figure 3 As shown, the retractable large-stroke clamping buckle provided in this embodiment includes: a fixed carrier 1, an articulated seat 2, a handle 3, a pull rod 4 and a hook 5. The articulated seat 2 is installed on the fixed carrier 1, and one end of the handle 3 is hinged on the articulated seat 2, so that the handle 3 can deflect on the articulated seat 2, and a gap is created between the end of the handle 3 and the fixed carrier 1 through the articulated seat 2, so that an anti-loosening dead point can be formed to meet the use requirements of self-locking. At the same time, one end of the pull rod 4 is hinged to the middle of the handle 3, and the other end of the pull rod 4 is provided with a hook 5, so that when the handle 3 is deflected, the pull rod 4 can pull the hook 5 to move, thereby achieving clamping and unlocking. In addition, Figure 4 This is a reference diagram for the use of a retractable large-stroke clamping buckle of the present invention. Figure 4As shown, there is a gap between the fixed carrier 1 and the object to be clamped. At this time, the hook head of the hook 5 is hooked on the object to be clamped, and then the handle 3 is deflected in the opposite direction, the pull rod 4 is driven by the handle 3 to move, and the hook 5 is pulled by the pull rod 4 to move, thereby connecting the fixed carrier 1 and the clamped object, and the handle 3 can achieve self-locking after passing the anti-loosening dead point, so that the object to be clamped can be stably and reliably clamped to meet the use requirements.

[0021] Specifically, a telescopic mechanism 6 is provided between the hook 5 and the pull rod 4, and the telescopic mechanism 6 is used to realize the telescopic length of the hook 5, so that the effective length of the clamping buckle can be adjusted. In addition, the clamping stroke and the clamping force can also be adjusted by adjusting the telescopic length of the hook 5. The structure is more flexible, better adaptable, and has fewer usage restrictions.

[0022] More specifically, the telescopic mechanism 6 disposed between the hook 5 and the pull rod 4 includes a telescopic body 61 and a ratchet assembly 62. The telescopic body 61 serves as a mounting carrier for the ratchet assembly 62 and is also a carrier for the ratchet assembly 62 to cooperate with the hook 5. At this time, the ratchet assembly 62 includes a ratchet paddle 621, a pressing member 622, and a resetting elastic member 623. During assembly, the telescopic body 61 is mounted on one end of the pull rod 4 connected to the hook 5, so that when the handle 3 is deflected, the telescopic body 61 can be driven by the pull rod 4 to move relative to the hook 5, thereby meeting the use requirements of the hook 5 to be telescopic on the telescopic body 61. In addition, a telescopic guide groove 624 is disposed on the telescopic body 61, and one end of the hook 5 is slidably disposed in the telescopic guide groove 624. The telescopic movement of the hook 5 on the telescopic body 61 is guided by the telescopic guide groove 624, thereby improving the stability of the hook 5 when it is telescopic. In addition, a plurality of saw teeth 51 are provided on the outer wall of one end of the hook 5 that matches the telescopic guide groove 624 along its length direction, so that the saw teeth 51 can cover the telescopic stroke of the hook 5. At the same time, the middle part of the ratchet paddle 621 is hinged to the telescopic body 61, so that the ratchet paddle 621 can deflect on the telescopic body 61, thereby changing the positions of the two ends of the ratchet paddle 621. In addition, a ratchet 6211 is provided at one end of the ratchet paddle 621, and the ratchet 6211 matches the saw teeth 51 on the hook 5. The ratchet 6211 presses against the saw teeth 51 to limit the position of the hook 5 on the telescopic body 61, thereby maintaining the clamping state of the clamping buckle. When the ratchet 6211 loses its pressing effect on the saw teeth 51, the hook 5 can slide on the telescopic body 61, meeting the use requirements of the clamping buckle for length extension. At the same time, the ratchet paddle 621 is provided with one end of the ratchet tooth 6211 and a reset elastic member 623 is provided between the side away from the ratchet tooth 6211 and the telescopic body 61, that is, one end of the reset elastic member 623 abuts against the ratchet paddle 621, and the other end abuts against the telescopic body 61, so that the reset elastic member 623 can apply elastic pressure to the end of the ratchet paddle 621 with the ratchet tooth 6211, so that under normal circumstances the ratchet tooth 6211 can always press the saw tooth 51, restricting the hook 5 from moving to one side, thereby improving the reliability and stability of the clamping buckle when in use; when the hook 5 moves along the unlocking direction of the ratchet tooth 6211, the saw tooth 51 can automatically push open the ratchet tooth 6211, so that the hook 5 can automatically retract, thereby meeting the purpose of being able to deflect the handle 3 multiple times to achieve multiple clamping, and increasing the clamping stroke and clamping force through multiple clamping, and having better adaptability.In addition, a pressing piece 622 is also provided on the telescopic body 61, and the pressing piece 622 abuts against the other end of the ratchet paddle 621 and is located on the side away from the ratchet 6211, that is, the pressing piece 622 can be connected to the non-ratchet 6211 end of the ratchet paddle 621, that is, when the pressing piece 622 is pressed down, the pressing piece 622 can push the ratchet paddle 621 to deflect, so that the ratchet 6211 of the ratchet paddle 621 is separated from the corresponding saw teeth 51, so that the hook 5 can be manually pulled out, thereby realizing manual extension of the hook 5, which also meets the adjustment requirements. It is worth pointing out that when the handle 3 and the pull rod 4 are vertical, the clamping force provided by the clamping buckle is the smallest. At this time, the clamping force is the ratio of the total length of the handle 3 and the distance between the two hinge points on the handle 3 multiplied by the force applied to the handle 3. When the angle between the handle 3 and the pull rod 4 is 0° and 180°, the clamping force provided by the clamping buckle is the largest. At this time, the clamping force is the ratio of the total length of the handle 3 and the distance between the two hinge points on the handle 3 multiplied by the sine value of the angle between the handle 3 and the pull rod 4 multiplied by the force applied to the handle 3. At this time, when the angle between the handle 3 and the pull rod 4 is 0° and 180°, the sine value of the angle between the handle 3 and the pull rod 4 is close to 0, so that its clamping force is the largest. In addition, since the handle 3 of the existing lever-type clamping buckle on the market can only be deflected once, it can only perform one clamping process, resulting in the minimum clamping force in the clamping process being located in the middle of the clamping stroke, and the maximum clamping force is fixed and limited, resulting in greater restrictions on the use of the existing lever-type clamping buckle. The retractable large-stroke clamping buckle provided in this embodiment has a telescopic mechanism 6, and the telescopic mechanism 6 has a ratchet assembly 62. The ratchet assembly 62 realizes repeated deflection of the handle 3 during the clamping process, thereby realizing multiple clamping processes. When a large clamping force is required, it is only necessary to repeatedly deflect and clamp the handle 3 and the pull rod 4 at nearly 180°, which is more convenient to use and has better adaptability.

[0023] More specifically, the two sides of each saw tooth 51 are a steep side 511 and a gentle side 512. At the same time, the angle between the steep side 511 and the telescopic direction of the hook 5 is greater than the angle between the gentle side 512 and the telescopic direction of the hook 5. The gentle side 512 can provide conditions for the subsequent saw tooth 51 to automatically push away the ratchet 6211 and realize automatic unlocking, thereby meeting the automatic retraction requirement, while the steep side 511 can achieve mutual tightening of the saw tooth 51 and the ratchet 6211, thereby meeting the use requirements of clamping and loosening. Furthermore, the two sides of each ratchet tooth 6211 are also respectively a slow side 512 and a steep side 511, and the slow side 512 and the steep side 511 of the ratchet tooth 6211 cooperate with the slow side 512 and the steep side 511 of the corresponding saw tooth 51, respectively, so that the included angle between the steep side 511 of the saw tooth 51 and the center line of the hook is larger, and can be designed to be close to vertical, while the included angle between the slow side 512 of the saw tooth 51 and the center line of the hook is smaller, and can be designed to be less than 45°. In addition, the slow side 512 of the same saw tooth 51 is closer to the pull rod 4 than its steep side 511. Due to the smaller inclination angle of the slow side 512, the saw tooth 51 and the ratchet tooth are closer. The angle between the force direction of the soft edge 512 of 6211 and the moving direction of the hook 5 is extremely small, so that after the hook 5 is connected to the cage box waiting for the connected object, the telescopic body 61 can be driven by the handle 3 and the pull rod 4 to move quickly toward one side of the hook 5, and the ratchet 6211 can be pushed away by the soft edge 512 of the saw tooth 51, so that the hook 5 can be retracted toward the inside of the telescopic body 61, and after each retraction, the steep edge 511 of the ratchet 6211 can be supported against the steep edge 511 of the saw tooth 51 to prevent the hook 5 from being pulled out in the opposite direction toward the outside of the telescopic body 61. After repeated operations like this, the automatic retraction of the telescopic mechanism 6 can be achieved. In addition, after the user presses the pressing piece 622, the pressing piece 622 deflects the ratchet paddle 621, so that the ratchet teeth 6211 of the ratchet paddle 621 are away from the saw teeth 51, so that the user can pull out the hook 5 in the opposite direction, that is, the telescopic mechanism 6 can be manually extended. It can be seen that the telescopic mechanism 6 can be automatically retracted multiple times by repeatedly deflecting the handle 3, and the telescopic mechanism 6 can be extended manually, so that the effective length of the clamping buckle can be adjusted, and at the same time, the clamping stroke and the clamping force can be adjusted, the structure has higher flexibility, better adaptability, and fewer usage restrictions.

[0024] More specifically, the telescopic body 61 is box-shaped, so that the telescopic body 61 has a large internal space to install the telescopic mechanism 6. At this time, the telescopic body 61 includes a telescopic box 611 and a box cover 612, and the telescopic box 611 has an installation cavity, and the telescopic mechanism 6 is installed through the installation cavity. During assembly, one end of the telescopic box 611 is connected to the end of the pull rod 4 away from the handle 3, so that the telescopic box 611 follows the movement of the pull rod 4. In addition, the box cover 612 is installed at the cavity opening of the installation cavity of the telescopic box 611, and the telescopic guide groove 624 and the ratchet paddle 621 and the reset elastic member 623 of the telescopic mechanism 6 are all installed in the installation cavity, which not only facilitates the installation of the telescopic mechanism 6 in the installation cavity of the telescopic box 611, but also realizes the external protection of the telescopic mechanism 6.

[0025] More specifically, two baffles 63 are provided in the telescopic body 61. At this time, the two baffles 63 are arranged along the length direction of the pull rod 4, so that the baffles 63 can adapt to the telescopic movement of the hook 5. In addition, the two baffles 63 are arranged in parallel and spaced apart, and the interval between the two baffles 63 forms a telescopic guide groove 624, that is, the baffles 63 limit and guide the two ends of one end of the hook 5, thereby maintaining the stability of the hook 5 when it is telescoped.

[0026] More specifically, two groups of ratchet assemblies 62 are provided. At this time, the two groups of ratchet assemblies 62 are symmetrically arranged on both sides of the telescopic guide groove 624. At the same time, the ratchet teeth 6211 on the two ratchet paddles 621 in the two groups of ratchet assemblies 62 are arranged relative to each other, that is, the ratchet teeth 6211 of the two groups of ratchet assemblies 62 are arranged toward the telescopic guide groove 624, and the serrations 51 at one end of the hook 5 are located on both sides of the hook 5 and respectively cooperate with the ratchet teeth 6211 of the two groups of ratchet assemblies 62, so that the two sides of the hook 5 can be respectively restricted by the two ratchet assemblies 62, thereby ensuring the stability of the hook 5 during extension and clamping, and also improving the effectiveness of the hook 5 after clamping.

[0027] More specifically, a guide limit hole 52 is provided on one end of the hook 5 that is slidably disposed in the telescopic guide groove 624 and along the length direction of the telescopic guide groove 624. At the same time, a guide limit column 64 is also installed on the telescopic body 61. When assembling, the guide limit column 64 is inserted into the guide limit hole 52, and the telescopic length range of the hook 5 can be limited by the movement of the guide limit column 64 in the guide limit hole 52, and the safety problem caused by excessive telescopic movement of the hook 5 is also prevented. Preferably, the guide limit column 64 can be a limit screw threadedly connected to the telescopic body 61, which facilitates the installation of the guide limit column 64 on the telescopic body 61 and also facilitates the cooperation between the guide limit column 64 and the guide limit hole 52.

[0028] More specifically, a clamping sleeve 7 is arranged on the fixed carrier 1 and on the side of the hinge seat 2 away from the hook 5. At the same time, the clamping sleeve 7 has an annular clamping groove with an opening, and the opening of the annular clamping groove is arranged toward the handle 3, which provides conditions for the handle 3 to be clamped by the clamping sleeve 7 later. At this time, the opening of the annular clamping groove is smaller than the maximum width of the handle 3, and the inner contour of the annular clamping groove is consistent with the outer contour of the handle 3, so that after the user controls the handle 3 to deflect and pass the anti-loosening dead point, the handle 3 can be pressed into the annular clamping groove, and the handle 3 is limited by the clamping sleeve 7 to reversely deflect, thereby improving the stability and reliability of the clamping buckle after clamping.

[0029] More specifically, two pull rods 4 are provided for connecting the telescopic body 61 and the handle 3. At this time, the two pull rods 4 are respectively connected to the two sides of the telescopic body 61, and the other ends of the two pull rods 4 are respectively hinged to the two sides of the middle of the handle 3, so that the two sides of the telescopic body 61 can be respectively connected to the two sides of the handle 3, so that the force of the telescopic body 61 and the handle 3 can be more uniform, and the stability after telescoping and clamping is further improved. Preferably, a duckbill gasket is provided between the end of the pull rod 4 connected to the handle 3 and the handle 3, so that the pull rod 4 can better fit the arc-shaped outer wall of the handle 3, improve the stability of the pull rod 4 hinged on the handle 3, and the structural design is more reasonable.

[0030] More specifically, the pressing member 622 in the ratchet assembly 62 further includes a pressing rod 6221 and a button 6222. At this time, the pressing rod 6221 is arranged in a "T" shape, so that the pressing rod 6221 has a large end and a small end. In addition, a pressing hole is provided on the side wall of the telescopic body 61. During assembly, the large end of the pressing rod 6221 is located inside the telescopic body 61 and one end is pressed against the end of the ratchet paddle 621, so that the pressing rod 6221 and the ratchet paddle 621 are pressed against each other, and the small end of the pressing rod 6221 passes through the pressing hole and extends to the outside of the telescopic body 61. In addition, the variable cross-section formed between the large end and the small end of the pressing rod 6221 presses against the outer wall of the pressing hole, so as to prevent the pressing rod 6221 from falling out of the pressing hole. At the same time, the button 6222 is installed on the end of the pressing rod 6221 extending outside the telescopic body 61. The button 6222 forms a limiting structure on the small end of the pressing rod 6221, which can not only increase the contact area with the user's fingers and facilitate pressing, but also prevent the pressing rod 6221 from falling back from the pressing hole into the telescopic body 61.

[0031] More specifically, the resetting elastic member 623 that applies elastic force to the ratchet paddle 621 is a columnar spring. At the same time, an embedding hole 6212 is provided on one end of the ratchet paddle 621 corresponding to the resetting elastic member 623. During assembly, one end of the resetting elastic member 623 is inserted into the embedding hole 6212. The embedding hole 6212 improves the stability of the resetting elastic member 623 installed on the ratchet paddle 621, and prevents the resetting elastic member 623 from being separated from the ratchet paddle 621, so that the structural stability is better. In addition, the resetting elastic member 623 is always in a compressed state, so that the resetting elastic member 623 can be used to apply elastic force to the ratchet paddle 621, so that the ratchet 6211 can always support the sawtooth 51 without triggering the pressing member 622, so as to prevent the hook 5 from being pulled out in the reverse direction and losing the clamping effect, and the structural design is more reasonable.

[0032] More specifically, the telescopic box 611 and the box cover 612 of the telescopic body 61 are connected and screwed, which facilitates the opening and closing of the box cover 612, thereby facilitating the disassembly and assembly of the telescopic mechanism 6 and other structures on the telescopic body 61, and is conducive to assembly and repair after damage.

[0033] The telescopic large-stroke clamping buckle provided in the present embodiment includes a fixed carrier 1, an articulated seat 2, a handle 3, a pull rod 4, a hook 5 and a telescopic mechanism 6; a telescopic mechanism 6 is arranged between the hook 5 and the pull rod 4 connected to the handle 3, the telescopic mechanism 6 has a telescopic body 61 and a ratchet assembly 62, the telescopic body 61 is connected to the pull rod 4, the ratchet assembly 62 is installed in the telescopic body 61 and includes a ratchet paddle 621 and a pressing piece 622, and one end of the hook 5 is slidably arranged on the telescopic body 61 and has a sawtooth 51 corresponding to the ratchet paddle 621, when the handle 3 is deflected, the telescopic body 61 can be pulled by the pull rod 4 to move relative to the hook 5, so that the hook 5 can automatically retract under the action of the ratchet assembly 62, and can be manually extended when the pressing piece 622 is pressed down, and the ratchet assembly 62 can realize multiple automatic retractions of the hook 5, so that the effective length of the clamping buckle can be adjusted, and the clamping formation and the clamping force can also be adjusted, the structure has higher flexibility, better adaptability and fewer usage restrictions.

[0034] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A retractable large-stroke clamp, comprising a fixed carrier, a hinged seat, a handle, a pull rod and a hook, wherein the hinged seat is mounted on the fixed carrier, one end of the handle is hinged on the hinged seat, one end of the pull rod is hinged to the middle of the handle, and the other end of the pull rod is provided with the hook, characterized in that: A telescopic mechanism is provided between the hook and the pull rod; In addition, the telescopic mechanism includes a telescopic body and a ratchet assembly, and the ratchet assembly includes a ratchet paddle, a pressing piece and a reset elastic piece. The telescopic body is installed on one end of the pull rod connected to the hook, and a telescopic guide groove is provided on the telescopic body, one end of the hook is slidably arranged in the telescopic guide groove, and a plurality of serrations are arranged on the outer wall of the end of the hook that cooperates with the telescopic guide groove along its length direction. At the same time, the middle part of the ratchet paddle is hinged to the telescopic body, one end of the ratchet paddle is provided with a ratchet and cooperates with the serrations on the hook, and the ratchet paddle is provided with one end of the ratchet and is located on a side away from the ratchet, and the reset elastic piece is provided between the telescopic body and the telescopic body, and the pressing piece is also provided on the telescopic body, and the pressing piece abuts against the other end of the ratchet paddle and is located on a side away from the ratchet.

2. The retractable long-stroke clamp according to claim 1, characterized in that: The two sides of each saw tooth are respectively a steep side and a gentle side, the angle between the steep side and the extension and contraction direction of the hook is greater than the angle between the gentle side and the extension and contraction direction of the hook, and the two sides of each ratchet tooth are also respectively a gentle side and a steep side, and the gentle side and the steep side of the ratchet tooth respectively cooperate with the gentle side and the steep side of the corresponding saw tooth.

3. The retractable long-stroke clamp according to claim 1, characterized in that: The telescopic body is box-shaped, including a telescopic box and a box cover. The telescopic box has an installation cavity. One end of the telescopic box is connected to the end of the pull rod away from the handle. The box cover is installed at the cavity opening of the installation cavity of the telescopic box. The telescopic guide groove, the ratchet paddle, and the reset elastic member are all installed in the installation cavity.

4. The retractable long-stroke clamp according to claim 1, characterized in that: Two baffles are arranged in the telescopic body, and both of the baffles are arranged along the length direction of the pull rod. The two baffles are arranged in parallel and at intervals, and the interval between the two baffles constitutes the telescopic guide groove.

5. The retractable long-stroke clamp according to claim 1, characterized in that: The ratchet assemblies are provided in two groups, and the two groups of ratchet assemblies are symmetrically arranged on both sides of the telescopic guide groove. At the same time, the ratchet teeth on the two ratchet paddles in the two groups of ratchet assemblies are arranged opposite to each other, and the serrations at one end of the hook are located on both sides of the hook and respectively cooperate with the ratchet teeth of the two groups of ratchet assemblies.

6. The retractable large-stroke clamp according to claim 1, characterized in that: A strip-shaped guide limit hole is provided on one end of the hook slidably arranged in the telescopic guide slot along the length direction of the telescopic guide slot, and a guide limit column is installed on the telescopic body, and the guide limit column is inserted into the guide limit hole.

7. The retractable large-stroke clamp according to claim 1, characterized in that: A clamping sleeve is arranged on the fixed carrier and located on the side of the hinge seat away from the hook. The clamping sleeve has an annular groove with an opening, and the opening of the annular groove is smaller than the maximum width of the handle, and the inner contour of the annular groove is consistent with the outer contour of the handle.

8. The retractable long-stroke clamp according to claim 1, characterized in that: Two pull rods are provided, and the two pull rods are respectively connected to the two sides of the telescopic body, and the other ends of the two pull rods are respectively hinged to the two sides of the middle part of the handle.

9. The retractable long-stroke clamp according to claim 1, characterized in that: The pressing member includes a pressing rod and a button, the pressing rod is arranged in a "T" shape, a pressing hole is opened on the side wall of the telescopic body, the large head end of the pressing rod is located in the telescopic body and one end is against the end of the ratchet paddle, the small head end of the pressing rod passes through the pressing hole and extends to the outside of the telescopic body, and the button is installed on the end of the pressing rod extending outside the telescopic body.

10. The retractable long-stroke clamp according to claim 1, characterized in that: The resetting elastic member is a columnar spring. At the same time, an embedding hole is opened on the end of the ratchet paddle corresponding to the resetting elastic member. One end of the resetting elastic member is inserted into the embedding hole, and the resetting elastic member is always in a compressed state.

Images