Telescopic large-stroke clamping buckle

Abstract

The utility model 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 utility model relates to the technical field of connectors, 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 the cages to store and transport various express packages, and cage racks are used to load and unload the cages from the delivery vehicles. During use, logistics personnel will install the entire cage on the cage rack, and then transfer the cage to the delivery vehicle using the cage rack. Therefore, achieving a stable connection between the cage and the cage rack is key to ensuring the normal operation of logistics.

[0003] Currently, lever-type clamps are commonly used on the market to achieve a stable connection between a cage and a cage frame. One end of the handle is hinged to a fixed carrier, and the middle of the handle is hinged to one end of a pull rod. The other end of the pull rod is provided with a hook. Furthermore, a gap is formed between the end of the handle hinged to the fixed carrier and the fixed carrier to form an anti-loosening dead point. This allows the handle to be deflected and pass the anti-loosening dead point, resulting in a locked state, thereby maintaining the hooked state. Furthermore, when the lever-type clamp is used to secure the cage to the cage frame, one end of the handle is directly hinged to the fixed carrier on the cage frame, and the hook hooks the cage. The operator only needs to deflect the handle and pass the anti-loosening dead point, and the hook will then securely lock the cage to the cage frame, meeting the requirements. However, existing lever-type clamps are all fixed structures, meaning that the dimensions and configurations of the handle, pull rod, and hook cannot be changed during use. This results in an inability to adjust the overall effective length, clamping stroke, and clamping force, resulting in poor adaptability and significant usage restrictions. In addition, since the cage box is heavy when filled with express parcels, usually reaching about 1 ton, when logistics personnel move the cage box, problems such as jamming and deformation may occur, resulting in a misfit between the cage box and the cage frame. The clamping buckle used must also be able to adaptively adjust the effective 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 response to 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 to realize the adjustment of the effective length. At the same time, the telescopic mechanism adopts 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:

[0006] A retractable large-stroke clamping buckle comprises a fixed carrier, an articulated seat, a handle, a pull rod and a hook. The articulated seat is mounted on the fixed carrier, one end of the handle is hinged to 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. The buckle has the following characteristics: a telescopic mechanism is provided between the hook and the pull rod;

[0007] In addition, the telescopic mechanism includes a telescopic body and a ratchet assembly, and the ratchet assembly includes a ratchet paddle, a pressing member and a reset elastic member. 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 member is provided between one end of the ratchet paddle and the side away from the ratchet and the telescopic body. A pressing member is also provided on the telescopic body, and the pressing member abuts against the other end of the ratchet paddle and the side away from the ratchet.

[0008] The above-mentioned retractable large-stroke clamping buckle, wherein the two sides of each saw tooth are a steep side and a gentle side respectively, 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 are also a gentle side and a steep side respectively, and the gentle side and steep side of the ratchet respectively cooperate with the gentle side and steep side of the corresponding saw tooth.

[0009] 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.

[0010] The above-mentioned telescopic large-stroke clamping buckle has two baffles arranged in the telescopic body, both of which are arranged along the length direction of the pull rod, and the two baffles are arranged in parallel and spaced apart, and the space between the two baffles constitutes a telescopic guide groove.

[0011] The above-mentioned telescopic large-stroke clamping buckle is provided with two groups of ratchet assemblies, 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.

[0012] The above-mentioned telescopic large-stroke clamping buckle, wherein a hook is slidably arranged on one end of 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.

[0013] 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.

[0014] The above-mentioned telescopic large-stroke clamping buckle has two pull rods, which are respectively connected to both sides of the telescopic body, and the other ends of the two pull rods are respectively hinged to both sides of the middle part of the handle.

[0015] 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, and a pressing hole is opened on the side wall of the telescopic body. The large head end of the pressing rod is located inside 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. The button is installed on the end of the pressing rod extending outside the telescopic body.

[0016] 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 corresponding to the ratchet paddle and 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.

[0017] In the above-mentioned telescopic large-stroke clamping buckle, the telescopic box and the box cover are fastened by connecting screws.

[0018] The positive effects of the above technical solution are:

[0019] The above-mentioned retractable large-stroke clamping buckle is achieved by arranging 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. At the same time, the ratchet assembly includes a ratchet paddle with ratchet teeth and a pressing member that is pressed to drive the ratchet paddle to deflect. In addition, a serration 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 serration, and the hook can be pulled out in the opposite 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. The structure is more flexible, the adaptability is better, and the usage restrictions are smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of an embodiment of a retractable large-stroke clamping buckle of the present utility model;

[0021] Figure 2 This is an exploded view of an embodiment of a retractable large-stroke clamping buckle of the present invention;

[0022] Figure 3 This is a schematic diagram of the cooperation between a hook and a telescopic mechanism of a telescopic large-stroke clamping buckle of the present invention;

[0023] Figure 4 This is a reference diagram for the use of a retractable large-stroke clamping buckle of the utility model.

[0024] In the accompanying drawings: 1. Fixed carrier; 2. Articulated seat; 3. Handle; 4. Pull rod; 5. Hook; 51. Sawtooth; 52. Guide limit hole; 511. Steep edge; 512. Soft 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

[0025] 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 the attached 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.

[0026] Figure 1 This is a structural diagram of an embodiment of a retractable large-stroke clamping buckle of the present utility model; Figure 2 This is an exploded view of an embodiment of a retractable large-stroke clamping buckle of the present invention; Figure 3 This 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. In addition, the articulated seat 2 allows a gap to exist between the end of the handle 3 and the fixed carrier 1, thereby forming an anti-loosening dead point 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 deflects, 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 utility model. 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, and the pull rod 4 is driven by the handle 3 to move, and the hook 5 is pulled to move by the pull rod 4, 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 clamped stably and reliably to meet the use requirements.

[0027] Specifically, a telescopic mechanism 6 is provided between the hook 5 and the pull rod 4. The telescopic mechanism 6 realizes the extension and contraction of the 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 extension length of the hook 5. The structure is more flexible, better adaptable, and has fewer usage restrictions.

[0028] More specifically, the telescopic mechanism 6, disposed between the hook 5 and the pull rod 4, comprises a telescopic body 61 and a ratchet assembly 62. The telescopic body 61 serves as a mounting support for the ratchet assembly 62 and also serves as a support for the ratchet assembly 62 to engage with the hook 5. The ratchet assembly 62 further comprises a ratchet paddle 621, a pressing member 622, and a resilient reset member 623. During assembly, the telescopic body 61 is mounted on the end of the pull rod 4 that connects to the hook 5. This allows the pull rod 4 to drive the telescopic body 61 relative to the hook 5 when the handle 3 deflects, thereby allowing the hook 5 to extend and retract on the telescopic body 61. Furthermore, a telescopic guide groove 624 is provided on the telescopic body 61, into which one end of the hook 5 slides. The telescopic guide groove 624 guides the telescopic movement of the hook 5 on the telescopic body 61, improving the stability of the hook 5 during extension and retraction. In addition, a plurality of serrations 51 are provided along the length of the outer wall of the end of the hook 5 that engages the telescopic guide slot 624, allowing the serrations 51 to cover the telescopic travel of the hook 5. Simultaneously, the middle portion of the ratchet paddle 621 is hingedly connected to the telescopic body 61, allowing the ratchet paddle 621 to deflect on the telescopic body 61, thereby changing the position of the two ends of the ratchet paddle 621. Furthermore, a ratchet tooth 6211 is provided at one end of the ratchet paddle 621, which engages with the serrations 51 on the hook 5. The ratchet tooth 6211 abuts against the serrations 51, restricting the position of the hook 5 on the telescopic body 61 and maintaining the clamping state of the clamp. When the ratchet tooth 6211 loses its abutment against the serrations 51, the hook 5 can slide on the telescopic body 61, satisfying the length expansion and contraction requirements of the clamping mechanism. 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 is against the ratchet paddle 621, and the other end is 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, limiting the movement of the hook 5 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 further 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 teeth 6211 of the ratchet paddle 621 are separated from the corresponding serrations 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 perpendicular, 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 angles between the handle 3 and the pull rod 4 are 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 angles between the handle 3 and the pull rod 4 are 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.

[0029] 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, meeting the automatic retraction requirement, while the steep side 511 can realize the mutual tightening of the saw tooth 51 and the ratchet 6211, meeting the use requirement of clamping and loosening. Moreover, the two sides of each ratchet tooth 6211 are also a gentle edge 512 and a steep edge 511, and the gentle edge 512 and the steep edge 511 of the ratchet tooth 6211 cooperate with the gentle edge 512 and the steep edge 511 of the corresponding saw tooth 51, respectively, so that the angle between the steep edge 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 angle between the gentle edge 512 of the saw tooth 51 and the center line of the hook is smaller and can be designed to be less than 45 degrees. In addition, the gentle edge 512 of the same saw tooth 51 is closer to the pull rod 4 than its steep edge 511. Due to the smaller inclination angle of the gentle edge 512, the saw tooth 51 and the ratchet tooth 51 are closer to each other. The angle between the direction of the force 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 connection 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, thereby realizing the retraction of the hook 5 toward the inside of the telescopic body 61, and after each retraction, the steep edge 511 of the ratchet 6211 can be used to support the steep edge 511 of the saw tooth 51, preventing 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 realized. In addition, after the user presses the pressing member 622, the pressing member 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 reverse direction, that is, the telescopic mechanism 6 is 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 also be manually extended, thereby making it possible to adjust the effective length of the clamping buckle, and at the same time, the clamping stroke and the clamping force can be adjusted, so that the structure has higher flexibility, better adaptability, and fewer usage restrictions.

[0030] More specifically, the telescopic body 61 is box-shaped, so that the telescopic body 61 has a large internal space for installing 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, through which the telescopic mechanism 6 is installed. 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 external protection of the telescopic mechanism 6.

[0031] More specifically, the telescopic body 61 is provided with two stoppers 63. Both stoppers 63 are arranged along the length of the pull rod 4 so that they can accommodate the telescopic movement of the hook 5. Furthermore, the two stoppers 63 are arranged side by side with a gap between them, and the gap between the two stoppers 63 forms a telescopic guide slot 624. Specifically, the stoppers 63 constrain and guide both ends of one end of the hook 5, thereby maintaining the stability of the hook 5 during telescopic movement.

[0032] More specifically, there are two groups of ratchet assemblies 62. 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, ensuring the stability of the hook 5 during extension and clamping, and also improving the effectiveness of the hook 5 after clamping.

[0033] More specifically, a linear guide limit hole 52 is provided on one end of the hook 5 that is slidably disposed in the telescopic guide slot 624 and along the length of the telescopic guide slot 624. Furthermore, a guide limit post 64 is mounted on the telescopic body 61. During assembly, the guide limit post 64 is inserted into the guide limit hole 52. The movement of the guide limit post 64 within the guide limit hole 52 limits the telescopic length range of the hook 5, thereby preventing safety issues caused by excessive telescopic movement of the hook 5. Preferably, the guide limit post 64 can be a limit screw threadedly connected to the telescopic body 61, facilitating installation of the guide limit post 64 on the telescopic body 61 and facilitating the fit between the guide limit post 64 and the guide limit hole 52.

[0034] More specifically, a clamping sleeve 7 is spaced apart on the fixed carrier 1, on the side of the hinged base 2 facing away from the hook 5. The clamping sleeve 7 has an annular groove with an opening, and the opening of the annular groove faces the handle 3, facilitating subsequent clamping of the handle 3 by the clamping sleeve 7. The opening of the annular groove is smaller than the maximum width of the handle 3, and the inner contour of the annular groove is consistent with the outer contour of the handle 3. This allows the user to deflect the handle 3 and pass the anti-loosening dead point, then press the handle 3 into the annular groove. The clamping sleeve 7 restricts reverse deflection of the handle 3, thereby improving the stability and reliability of the clamping buckle after it is locked.

[0035] More specifically, two pull rods 4 are provided for connecting the telescopic body 61 and the handle 3. In this case, 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 connected to the two sides of the handle 3 respectively, so that the force applied to the telescopic body 61 and the handle 3 can be more even, further improving the stability after telescoping and clamping. Preferably, a duckbill gasket is provided between the end of the pull rod 4 connected to the handle 3 and the handle 3, which can make the pull rod 4 better fit the curved outer wall of the handle 3, improve the stability of the pull rod 4 hinged to the handle 3, and make the structural design more reasonable.

[0036] More specifically, the pressing member 622 in the ratchet assembly 62 further includes a pressing rod 6221 and a button 6222. The pressing rod 6221 is arranged in a T-shape, having a large end and a small end. Furthermore, a pressing hole is defined on the side wall of the telescopic body 61. During assembly, the large end of the pressing rod 6221 is positioned within the telescopic body 61, with one end resting against the end of the ratchet paddle 621, thereby achieving contact between the pressing rod 6221 and the ratchet paddle 621. The small end of the pressing rod 6221 is then passed through the pressing hole and extended outside the telescopic body 61. Furthermore, the variable cross-section formed between the large and small ends of the pressing rod 6221 rests against the outer wall of the pressing hole, preventing 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.

[0037] More specifically, the return spring 623, which applies elastic force to the ratchet paddle 621, is a cylindrical spring. A recess 6212 is defined on the end of the ratchet paddle 621 corresponding to the return spring 623. During assembly, one end of the return spring 623 is inserted into the recess 6212. The recess 6212 enhances the stability of the return spring 623 mounted on the ratchet paddle 621, preventing the return spring 623 from separating from the ratchet paddle 621 and improving structural stability. Furthermore, the return spring 623 is always in a compressed state, allowing it to exert elastic force on the ratchet paddle 621. This allows the ratchet teeth 6211 to maintain contact with the saw teeth 51 without triggering the pressing member 622, preventing the hook 5 from being pulled out in the opposite direction and losing its grip. This provides a more rational structural design.

[0038] More specifically, the telescopic box 611 and the box cover 612 of the telescopic body 61 are connected by screws for locking, 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.

[0039] The telescopic large-stroke clamping buckle provided in this 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 member 622, and one end of the hook 5 is slidably set on the telescopic body 61 and has a serration 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 member 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.

[0040] The above are only preferred embodiments of the present invention and do not 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 to 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; The retractable mechanism includes a retractable body and a ratchet assembly, and the ratchet assembly includes a ratchet paddle, a pressing member and a reset elastic member, the retractable body is installed on one end of the pull rod connected to the hook, a retractable guide slot is provided on the retractable body, one end of the hook is slidably arranged in the retractable guide slot, and a plurality of serrations are provided on the outer wall of the end of the hook that cooperates with the retractable guide slot along its length direction. At the same time, the middle part of the ratchet paddle is hinged to the retractable 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 the side away from the ratchet, and the reset elastic member is provided between the telescopic body and the retractable body. The pressing member is also provided on the telescopic body, and the pressing member abuts against the other end of the ratchet paddle and on the 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, and 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. The two sides of each ratchet are also respectively a gentle side and a steep side, and the gentle side and the steep side of the ratchet are respectively matched 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 blocking bars are provided in the telescopic main body. Both blocking bars are arranged along the length direction of the pull rod. The two blocking bars are arranged in parallel and spaced apart. The space between the two blocking bars 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 long-stroke clamp according to claim 1, characterized in that: The hook is slidably arranged on one end of the telescopic guide slot, and a strip-shaped guide limit hole is opened along the length direction of the telescopic guide slot. 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 long-stroke clamp according to claim 1, characterized in that: A clamping sleeve is provided on the fixed carrier and located on the side of the hinged 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 both sides of the telescopic body, and the other ends of the two pull rods are respectively hinged to both sides of the middle part of the handle.

9. The retractable long-stroke clamp according to claim 1, characterized in that: 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 inside 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. 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 reset 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 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.

Images