Rope tightening device with double meshing points

Abstract

The utility model relates to a euphroe with double meshing points, which comprises a support, a main shaft, a ratchet wheel, a rear pawl assembly and a rope, the main shaft is arranged on the support, the ratchet wheel is sleeved on the main shaft, the rear pawl assembly is hinged on the support and meshed with the ratchet wheel, the rope is wound on the ratchet wheel, the euphroe further comprises a handle and a front pawl assembly, the handle is sleeved on the main shaft, and the front pawl assembly is sleeved on the main shaft. The front pawl assembly comprises a front pawl, a front shaft and a tension spring, the front shaft is arranged on the handle, the front shaft is sleeved with the front pawl, the front pawl is meshed with the ratchet wheel, the meshing direction of the rear pawl assembly is consistent with that of the front pawl, and the upper end and the lower end of the tension spring are connected with the handle and the front pawl respectively. According to the technical scheme, the single-phase clutch structure of the euphroe can conduct multi-point locking on the ratchet wheel, so that loads are effectively dispersed, it is guaranteed that the structure is not prone to abrasion and deformation, the use safety is high, and the requirement for dragging heavy targets can be met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rope tightener, more particularly to a rope tightener with double tooth engagement points. BACKGROUND

[0002] The rope tightener is a tool for fastening or dragging target objects, which is suitable for transportation and other outdoor operations. The conventional rope tightener is usually composed of a bracket, a ratchet wheel, a pawl, a main shaft and a rope. The ratchet wheel, the pawl and the main shaft are all arranged on the bracket, and the ratchet wheel is arranged on the end of the main shaft. The ratchet wheel is in engagement with the pawl, and the ratchet wheel can rotate around the connecting position of the bracket, so that a one-way clutch structure is formed between the ratchet wheel and the pawl. The rope is wound on the main shaft, and a slot is also formed on the main shaft. For example, a safer multi-wheel tooth rope tightener disclosed in Chinese Patent No. CN219382911U includes a main shaft, a connecting plate arranged on the main shaft, and the main shaft penetrating through the connecting plate at both ends. A ratchet wheel disc is arranged at the first end of the main shaft, and ratchet teeth are uniformly distributed on the outer periphery of the ratchet wheel disc. The number of ratchet teeth is 18-22. The tightness distance is short, which facilitates the reinforcement of the truck when loading large equipment. A stopper is arranged corresponding to the ratchet teeth. The stopper includes a stop block. A groove is arranged on the side of the stop block close to the ratchet wheel disc corresponding to the ratchet teeth. The shape of the groove is adapted to the shape of the ratchet teeth. An arc-shaped handle is arranged on the side of the stop block away from the ratchet wheel disc. The tail end of the arc-shaped handle extends outward and upward. A rotating plate is arranged on the upper part of the stop block. The rotating plate is rotatably arranged on one side of the connecting plate. A rotating shaft is arranged corresponding to the rotating plate and the connecting plate. The rotating shaft connects the rotating plate and the connecting plate together. The rotating plate rotates around the rotating shaft. Two groups of through holes perpendicular to the direction are formed on the tail end of the main shaft. The through holes are used for inserting a crowbar. Two banding slot grooves are arranged on the middle part of the main shaft.

[0003] In use, the bracket of the above-mentioned existing rope tightener is fixedly installed on a vehicle or other tool. The user binds one end of the rope to a target object, and then rotates the main shaft by using a crowbar or other tool to tighten the rope, so as to fix or drag the bound object to move in the direction of the rope winding. The design of the rope tightener enables the above-mentioned operation to be conveniently and quickly performed even without professional tools. In addition, the one-way clutch structure formed between the ratchet wheel and the pawl allows the rope to be gradually tightened in one direction, and prevents the rope from being accidentally released in the opposite direction. Therefore, the operation efficiency of the rope tightener is improved, and the safety of the rope tightener when fixing goods is enhanced. However, when the existing rope tightener is used to drag a heavy target object, the single-phase clutch structure composed of the single ratchet wheel and the pawl will bear a huge load, which causes the ratchet wheel and the pawl to be easily worn or even deformed and broken. In this case, the rope cannot be effectively tightened, which exists a huge safety hazard. SUMMARY

[0004] In view of the above, in order to overcome the problem that the existing rope tightener bears huge load only through the single-phase clutch structure composed of a single ratchet and pawl when dragging heavy target objects, which causes the ratchet and pawl to be easily worn or even deformed and broken, and the rope cannot be effectively tightened, thereby causing huge safety hazards, the utility model aims to provide a single-phase clutch structure capable of locking the ratchet at multiple points, thereby effectively dispersing the load and ensuring that the structure is not easily worn or deformed, and the safety is high, and the rope tightener can meet the requirements of dragging heavy target objects.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present application is:

[0006] The utility model discloses a rope tightener with double tooth engagement points, which comprises a support, a main shaft, a ratchet, a rear pawl assembly and a rope, the main shaft is arranged on the support, the ratchet is sleeved on the main shaft, the rear pawl assembly is hinged to the support and is in engagement with the ratchet, and the rope is wound around the ratchet.

[0007] Preferably, a guide plate is formed on the front pawl, a guide groove is formed in the guide plate, the height of the guide groove increases from the middle to both ends, the both ends are located on both sides of the hinging position of the front pawl, and the lower end of the tension spring is embedded in the guide groove.

[0008] Preferably, the front pawl assembly further comprises a push plate, the push plate is sleeved on the front shaft, the push plate is located on one side of the guide plate, a handle is formed on the push plate, a push-pull groove is formed in the push plate, the push-pull groove is communicated with the guide groove, and the lower end of the tension spring is embedded in the guide groove and the push-pull groove.

[0009] Preferably, the rear pawl assembly comprises a rear pawl, a rear shaft and a torsion spring, the rear shaft is arranged on the support, the rear pawl and the torsion spring are sleeved on the rear shaft, and the two ends of the torsion spring are connected with the support and the rear pawl respectively.

[0010] Preferably, a push-pull head is formed on the rear pawl.

[0011] Preferably, a front hook body is arranged at the front end of the rope, and a rear hook body is arranged at the rear end of the support.

[0012] Preferably, a limiting member is arranged at the front end of the support, a limiting groove is formed in the limiting member, and the rope is slidably connected in the limiting groove.

[0013] Preferably, a sliding groove is formed in the outer peripheral wall of the ratchet, and the rope is wound around the ratchet through the sliding groove.

[0014] Preferably, the rope is made of high-strength fabric.

[0015] Preferably, the rope is a steel wire rope.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] The rope tightener of the utility model is composed of a one-way clutch structure between a rear pawl assembly, a front pawl assembly and a ratchet, so that two engagement points are formed on the ratchet when engaging, which jointly limit the rotation direction of the ratchet, effectively keeping the rope tight when dragging heavy targets, significantly reducing the risk when dragging heavy targets, and can disperse the load, increase the force or torque that the entire one-way clutch structure can withstand, and reduce the possibility of wear, deformation and fracture of the rear pawl assembly, the front pawl of the front pawl assembly and the ratchet when dragging heavy targets, thereby extending the service life. In addition, in some special cases, if one of the engagement points fails, the rope can still be kept tight, thereby improving the safety and reliability during the operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the rope tightener of the utility model when the rear pawl assembly and the front pawl assembly are simultaneously engaged with the ratchet wheel;

[0019] Figure 2 This is a schematic diagram of the overall structure of the rope tightener of the utility model from another perspective when the rear pawl assembly and the front pawl assembly are simultaneously engaged with the ratchet wheel;

[0020] Figure 3 This utility model Figure 1 A schematic diagram of the cross-sectional structure of part A;

[0021] Figure 4 This utility model Figure 2 A schematic diagram of the cross-sectional structure of part B;

[0022] Figure 5 This is a schematic diagram of the structure of the utility model rope tightener in which the rear pawl assembly and the front pawl assembly are simultaneously engaged with the ratchet wheel, and the bracket is disassembled;

[0023] Figure 6 This is a schematic diagram of the structure of the rope tightener of the utility model, in which the rear pawl assembly and the front pawl assembly are simultaneously engaged with the ratchet wheel, and the handle is rotated to tighten the rope (the hollow arrow indicates the direction of rotation of the handle and the direction of movement of the rope);

[0024] Figure 7 This is a schematic diagram of the structure of the rope tightener of the utility model, with the rear pawl assembly and the front pawl assembly separated from the ratchet wheel and the rope being released (the hollow arrow indicates the direction of movement of the rope, and the solid arrow indicates the direction of movement of the handle of the front pawl assembly and the push-pull head of the rear pawl assembly);

[0025] Figure 8 It is the whole structure schematic diagram of the ratcheting device ratchet wheel.

[0026] As shown in the figure:

[0027] 1, support; 2, main shaft; 3, ratchet wheel; 301, sliding groove; 4, rear pawl assembly; 401, rear pawl; 401a, push-pull head; 402, rear shaft; 403, torsional spring; 5, rope; 6, handle; 7, front pawl assembly; 701, front pawl; 701a, guide plate; 701b, guide groove; 702, front shaft; 703, tension spring; 704, push plate; 704a, handle; 704b, push-pull groove; 8, front hook body; 9, rear hook body; 10, limiting piece; 1001, limiting groove. DETAILED DESCRIPTION

[0028] The application will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] In the description of the application, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product is usually placed, and are only for the convenience of simplifying the description, and do not indicate or imply that the orientation is a specific orientation and a specific orientation configuration and operation, and therefore cannot be understood as a limitation on the application.

[0030] Example 1:

[0031] As Figure 1 , Figure 2 , Figures 5 to 7 shown, the utility model relates to a kind of tight rope device of two-way locking, it includes support 1, main shaft 2, ratchet wheel 3, rear pawl assembly 4 and rope 5, main shaft 2 is located on support 1, main shaft 2 is fixedly connected between support 1, ratchet wheel 3 is sleeved on main shaft 2, ratchet wheel 3 can be rotated with main shaft 2 as rotating shaft, rear pawl assembly 4 is hinged on support 1, and is engaged with ratchet wheel 3, rear pawl assembly 4 can be separated from ratchet wheel 3 by rotating, rope 5 is wound on ratchet wheel 3, when ratchet wheel 3 rotates, make rope 5 forward or backward transport, rope 5 is used to tighten target object, or after being fixed with target object, drag by the rotation of ratchet wheel 3;

[0032] As Figures 1 to 7As shown, it also includes a handle 6 and a front pawl assembly 7, the handle 6 is sleeved on the main shaft 2, the handle 6 can be rotated with the main shaft 2 as the rotation axis, the front pawl assembly 7 includes a front pawl 701, a front shaft 702 and a tension spring 703, wherein the front shaft 702 is provided on the handle 6, and the front shaft 702 and the handle 6 are also fixedly connected, the front pawl 701 is sleeved on the front shaft 702, so that the front pawl 701 can be rotated with the front shaft 702 as the rotation axis, the front pawl 701 is engaged with the ratchet 3, and can also be separated from the ratchet 3 by rotation, the engagement direction of the rear pawl assembly 4 and the front pawl 701 is consistent, and the rear pawl assembly 4, the front pawl assembly 7 and the ratchet 3 form a one-way clutch structure, so that two The engagement points jointly limit the rotation direction of the ratchet 3, effectively keeping the rope 5 in a tight state when dragging heavy objects, significantly reducing the risk of dragging heavy objects, and can disperse the load, increasing the force or torque that the entire one-way clutch structure can withstand, reducing the possibility of wear, deformation and breakage of the rear pawl assembly 4, the front pawl 701 of the front pawl assembly 7 and the ratchet 3 when dragging heavy objects, thereby extending the service life. In addition, in certain special circumstances, if one of the engagement points fails, the rope 5 can still be kept tight, thereby improving the safety and reliability during the operation. When the front pawl assembly 7 and the rear pawl assembly 4 are separated from the ratchet 3 by rotation, the rope 5 can be loosened and moved forward any required distance;

[0033] When the pawl 701 is in the unlock state, the front pawl 701 is in the unlock state, and the front pawl 701 is in the unlock state, so the pawl 701 is locked and the front pawl 701 is locked.

[0034] like Figures 1 to 7As shown, the front pawl 701 is formed with a guide plate 701a, the guide plate 701a is provided with a guide groove 701b, the height of the guide groove 701b increases from the middle to both ends, which makes the shape of the guide groove 701b arc or with a single angle, and the both ends of the guide groove 701b are located on both sides of the hinge position of the front pawl 701, the lower end of the tension spring 703 is embedded in the guide groove 701b, thereby forming hooking with the guide plate 701a through the guide groove 701b, the lower end of the tension spring 703 can slide along the guide groove 701b to change the position of the connecting point between the front pawl 701 and the tension spring 703, when the lower end of the tension spring 703 moves to one side of the toothed position of the front pawl 701 and the ratchet wheel 3, the front pawl 701 can be pulled up to separate from the ratchet wheel 3, and when it moves to the other side, the front pawl 701 is pressed again to tightly engage with the ratchet wheel 3.

[0035] As shown in Figures 1 to 7 , the front pawl assembly 7 further comprises a push plate 704, the push plate 704 is sleeved on the front shaft 702, the push plate 704 is located on one side of the guide plate, the push plate 704 is formed with a handle 704a and a push-pull groove 704b, the push-pull groove 704b is communicated with the guide groove 701b, the lower end of the tension spring 703 is embedded in the guide groove 701b and the push-pull groove 704b, the above setting utilizes the rotation of the push plate 704 around the front shaft 702, the inner wall of the push-pull groove 704b pushes and pulls the lower end of the tension spring 703 to move along the guide groove 701b to change the position of the connecting point between the front pawl 701 and the tension spring 703, at the same time, the handle 704a is set to make the rotation of the push plate 704 more labor-saving by the lever principle, thereby easily controlling the movement of the lower end of the tension spring 703.

[0036] As shown in Figure 1 , Figure 2 , Figures 5 to 7 , the rear pawl assembly 4 comprises a rear pawl 401, a rear shaft 402 and a torsion spring 403, the rear shaft 402 is arranged on the support 1 and is fixedly connected, the rear pawl 401 and the torsion spring 403 are both sleeved on the rear shaft 402, thereby being able to rotate around the rear shaft 402 as the rotation axis, and being able to engage or separate with the ratchet wheel 3 by reciprocating rotation, the both ends of the torsion spring 403 are connected with the support 1 and the rear pawl 401 respectively, the rear pawl 401 is tightly engaged with the ratchet wheel 3 by the elastic force of the torsion spring 403, the stable engagement point ensures that the rear pawl 401 can effectively one-way lock the ratchet wheel 3 to prevent it from accidentally rotating, thereby further improving the reliability of the single-phase clutch structure, when the rear pawl 401 is rotated to separate from the ratchet wheel 3 by applying force, the torsion spring 403 is deformed, if the applied force is removed, the rear pawl 401 can automatically reset under the elastic force of the torsion spring 403 returning to deformation, thereby re-engaging with the ratchet wheel 3.

[0037] As shown in Figure 1 , Figure 2 , Figures 5 to 7As shown, a push-pull head 401 a is formed on the rear pawl 401 , and the push-pull head 401 a has the same function as the handle 704 a , and also utilizes the lever principle to facilitate more labor-saving control of the rotation of the rear pawl 401 .

[0038] like Figure 1 、 Figure 2 、 Figures 5 to 7 As shown, the front end of the rope 5 is provided with a front hook 8, and the rear end of the bracket 1 is provided with a rear hook 9. When dragging the target object, the front hook 8 can be directly hooked with the target object, or the auxiliary rope 5 can be tied to the target object to better fix the rope 5. At the same time, when dragging heavy targets, the rear hook 9 can fix the bracket 1 to the support, so that the bracket 1 is away from the heavy target. Correspondingly, the operator can also operate at a position away from the heavy target, so that the dragging operation can be carried out in a safe environment.

[0039] like Figure 1 、 Figure 2 、 Figures 5 to 7 As shown, a limiting member 10 is provided at the front end of the bracket 1, and a limiting groove 1001 is opened on the limiting member 10. The rope 5 is slidably connected to the limiting groove 1001. The limiting member 10 increases the positioning points on the rope 5, so that the positioning points on the rope 5 are increased to two, and the other positioning point is located at the matching position of the rope 5 and the ratchet 3. The part of the rope 5 located between the two positioning points remains straight, so that the rope 5 can be efficiently retracted and released, and the winding phenomenon during the retraction and release process is reduced.

[0040] like Figure 8 As shown, a sliding groove 301 is provided on the outer wall of the ratchet 3, and the rope 5 is wound around the ratchet 3 through the sliding groove 301, thereby engaging with the ratchet 3. The rope 5 is further limited by the sliding groove 301 to prevent separation from the ratchet 3, thereby improving stability.

[0041] Furthermore, the rope 5 is made of high-strength fabric, thereby achieving better flexibility, stretchability and wear resistance.

[0042] Example 2:

[0043] In this embodiment, the rope 5 is a steel wire rope, which is made of multiple strands of steel wire twisted together and has extremely high tensile strength and durability. Compared with the braided fabric rope 5, it can withstand greater tension and has better resistance to wear, cutting and corrosion, which makes it more durable. At the same time, it has greater hardness and is easier to retract and release when passing through the ratchet 3, reducing the possibility of knotting or entanglement during the retraction and release process.

[0044] See Figures 1 to 8And combine embodiment 1 and embodiment 2, the tight rope device of the utility model is composed of one-way clutch structure between rear pawl assembly 4, front pawl assembly 7 and ratchet 3, there are two tooth engagement points on ratchet 3, so the structure is more stable, and it is more suitable for dragging heavy target objects, for example, when using scene is wood operation, first, make a hole on the side of the tree trunk to be dragged, then push the handle 704a on the push plate 704 of front pawl assembly 7, change the position of the lower end of torsion spring 403 in the guide groove 701b of front pawl guide plate 701a, make front pawl 701 rotate and separate from ratchet 3, then press the push-pull head 401a on the rear pawl 401 of rear pawl assembly 4, make rear pawl 401 rotate and separate from ratchet 3 synchronously, prepare for loosening rope 5, when loosening rope 5, make rope 5 move a long distance forward, so as to be able to be sleeved on the tree trunk, and leave a safe distance, rope 5 can be selected from high-strength fabric or steel wire rope, after loosening is completed, remove the force applied to the push-pull head 401a, make rear pawl 401 rotate under the action of torsion spring 403, then push back the handle 704a of push plate 704, control the lower end of torsion spring 403 to reset, so as to make front pawl 701 and rear pawl 401 engage with ratchet 3 again, finally, use rope 5 to cooperate with front hook body 8 to be sleeved on the tree trunk, and fix support 1 and support by rear hook body 9, then the tightening of rope 5 can be carried out, only reciprocating handle 6 is needed, front pawl 701 tightly pressed on ratchet 3 by torsion spring 403 constantly pushes ratchet 3 to rotate in one direction, realize the tightening of rope 5, realize the dragging operation of tree trunk, under the action of pulling force, the tree trunk will finally be broken along the hole position, and the required wood is obtained.

[0045] The above examples and descriptions in the specification are only to illustrate the principles and best modes of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A rope tightener with double engagement points, comprising a bracket (1), a main shaft (2), a ratchet (3), a rear pawl assembly (4) and a rope (5), wherein the main shaft (2) is arranged on the bracket (1), the ratchet (3) is sleeved on the main shaft (2), the rear pawl assembly (4) is hinged to the bracket (1) and engages with the ratchet (3), and the rope (5) is wound around the ratchet (3), characterized in that: It also includes a handle (6) and a front pawl assembly (7), wherein the handle (6) is mounted on the main shaft (2), and the front pawl assembly (7) includes a front pawl (701), a front shaft (702) and a tension spring (703), wherein the front shaft (702) is arranged on the handle (6), and the front pawl (701) is mounted on the front shaft (702), wherein the front pawl (701) is engaged with the ratchet wheel (3), and the engagement directions of the rear pawl assembly (4) and the front pawl (701) are consistent, and the upper and lower ends of the tension spring (703) are respectively connected to the handle (6) and the front pawl (701).

2. The rope tightener with double engagement points according to claim 1, characterized in that: A guide plate (701a) is formed on the front pawl (701), and a guide groove (701b) is provided on the guide plate (701a). The height of the guide groove (701b) increases from the middle to the two ends, and the two ends are located on both sides of the hinge position of the front pawl (701). The lower end of the tension spring (703) is embedded in the guide groove (701b).

3. The rope tightener with double engagement points according to claim 2, characterized in that: The front pawl assembly (7) further includes a push plate (704), which is mounted on the front shaft (702). The push plate (704) is located on one side of the guide plate. A handle (704a) is formed on the push plate (704), and a push-pull groove (704b) is provided. The push-pull groove (704b) is connected to the guide groove (701b), and the lower end of the tension spring (703) is embedded in the guide groove (701b) and the push-pull groove (704b).

4. A rope tightener with double engagement points according to any one of claims 1 to 3, characterized in that: The rear pawl assembly (4) comprises a rear pawl (401), a rear axle (402) and a torsion spring (403); the rear axle (402) is arranged on the bracket (1); the rear pawl (401) and the torsion spring (403) are both sleeved on the rear axle (402); and the two ends of the torsion spring (403) are respectively connected to the bracket (1) and the rear pawl (401).

5. The rope tightener with double engagement points according to claim 4, characterized in that: A push-pull head (401a) is formed on the rear pawl (401).

6. A rope tightener with double engagement points according to any one of claims 1, 2, 3 or 5, characterized in that: The front end of the rope (5) is provided with a front hook body (8), and the rear end of the bracket (1) is provided with a rear hook body (9).

7. The rope tightener with double engagement points according to claim 6, characterized in that: A limiting member (10) is provided at the front end of the bracket (1), a limiting groove (1001) is provided on the limiting member (10), and the rope (5) is slidably connected in the limiting groove (1001).

8. A rope tightener with double engagement points according to claim 1, 2, 3, 5 or 7, characterized in that: A sliding groove (301) is provided on the outer peripheral wall of the ratchet (3), and the rope (5) is wound around the ratchet (3) through the sliding groove (301).

9. The rope tightener with double engagement points according to claim 8, characterized in that: The rope (5) is made of high-strength fabric.

10. The rope tightener with double engagement points according to claim 8, characterized in that: The rope (5) is a steel wire rope.

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