Tensioning mechanism, rope tightening mechanism and splitting device

Abstract

The utility model belongs to the technical field of tighteners, and particularly relates to a tensioning mechanism, a rope tightening mechanism and a splitting device, in the tensioning mechanism, a tensioning rack is arranged on a support in a left-right sliding mode, and the lower end of a driving rod and the upper end of a check pawl are hinged to the support through first rotating shafts; the check pawl is meshed with the tensioning rack, and the meshing point is located on the right side of the driving rod and used for preventing the tensioning rack from sliding leftwards. The upper end of the driving pawl is hinged to the driving rod, the lower end of the driving pawl is meshed with the tensioning rack, the meshing point is located on the right side of the driving rod, the driving pawl is located above the check pawl, and when the driving rod is rotated rightwards, the driving pawl can push the tensioning rack to move rightwards and drive the check pawl to enter a tooth groove in the left side of the tensioning rack. When the driving rod stops rotating, the check pawl is meshed with the tensioning rack, and then the tensioning rack is prevented from returning leftwards. In addition, the tensioning rack can return leftwards, and the overall structure is simple.

Description

Technical Field

[0001] This utility model belongs to the field of wire tensioner technology, specifically relating to a tensioning mechanism, a rope tightening mechanism, and a splitting device. Background Technology

[0002] A wire tensioner, also known as a ratchet tensioner, is used to tighten conductors during overhead line installation. To use it, first loosen the wire rope or galvanized iron wire on the tensioner and secure it to the crossarm. Clamp the conductor with wire clamps, then pull the wire with a special wrench. Due to the anti-reverse action of the pawls, the wire rope gradually winds around the ratchet drum, tightening the conductor. Secure the tightened conductor to the insulator. Then, first loosen the pawls to loosen the wire rope or galvanized iron wire, then loosen the wire clamps, and finally wind the wire rope or galvanized iron wire around the ratchet drum to complete the tensioning process.

[0003] Chinese patent document CN2885730Y(200520106111.7) discloses a wire tensioner that requires two ratchet teeth to mesh with a gear, used to move the gear or restrict the gear from reversing, and the overall mechanism is complex. Utility Model Content

[0004] The main purpose of this utility model is to provide a tensioning mechanism, a rope tightening mechanism, and a splitting device. In this embodiment, the tensioning rack is slidably mounted on the bracket. The lower end of the drive rod and the upper end of the check pawl are both hinged to the bracket via a first rotating shaft. The upper end of the active pawl is hinged to the drive rod. The lower end of the active pawl engages with the tensioning rack, and the engagement point is located on the right side of the drive rod. The active pawl is located above the check pawl. By rotating the drive rod to the right, the active pawl can push the tensioning rack to the right and drive the check pawl into the tooth groove on the left side of the tensioning rack, realizing the unidirectional movement of the tensioning rack. The check pawl prevents the tensioning rack from moving to the left. The overall structure is simple.

[0005] The technical problem to be solved by this utility model is achieved by the following technical solution: a tensioning mechanism, including a bracket, a tensioning rack, an active pawl, a check pawl, a drive rod, a force-applying arm, a first elastic element, a second elastic element, and a connecting component;

[0006] The tension rack is slidably mounted on the bracket;

[0007] The lower end of the drive rod and the upper end of the anti-return pawl are both hinged to the bracket via the first rotating shaft;

[0008] The anti-return pawl engages with the tensioning rack and the engagement point is located on the right side of the drive rod. The force-applying arm is connected to the anti-return pawl and is located on the left side of the drive rod. The force-applying arm is connected to the bracket through a first elastic element, which is used to give the force-applying arm an upward pulling force.

[0009] The upper end of the active pawl is hinged to the drive rod, the lower end of the active pawl meshes with the tension rack and the meshing point is located on the right side of the drive rod, the active pawl is located above the check pawl, and the active pawl is connected to the force-applying arm through the second elastic element. The second elastic element is used to give the active pawl a force pressing against the tooth surface of the tension rack.

[0010] The anti-return pawl, the lever arm, or the drive rod is provided with a connecting component, which is used to enable the drive rod to apply a force to the active pawl and the anti-return pawl to disengage from the tooth surface of the tension rack.

[0011] In a preferred embodiment of this invention, the connecting component includes a second rotating shaft, and the active pawl is hinged to the drive rod via the second rotating shaft. The second rotating shaft is located above the force-applying arm, and the distance between the first rotating shaft and the second rotating shaft is less than the length of the force-applying arm. When the drive rod rotates to the left, the active pawl on the outside of the second rotating shaft presses down on the force-applying arm, lifting the check pawl and simultaneously lifting the active pawl. The lifting of both the active pawl and the check pawl is achieved directly using the second rotating shaft as the connecting component, simplifying the overall structure.

[0012] In a preferred embodiment of this utility model, the connecting component includes a limiting protrusion disposed on the check pawl or the lever arm;

[0013] The drive rod rotates to the left and contacts the limiting protrusion, lifting the check pawl and the driving pawl. By contacting the limiting protrusion on the check pawl or the lever arm, the drive rod rotates to the left and lifts the check pawl, further lifting the driving pawl above the check pawl.

[0014] In a preferred embodiment of this invention, the bracket is provided with a limiting groove that matches the tension rack. The limiting groove is used to limit the tension rack.

[0015] Preferably, in this invention, the first and second elastic elements are springs or elastic bands. The elastic force of the springs or elastic bands provides the force for the active pawl and the check pawl to press down and tighten the rack teeth.

[0016] In a preferred embodiment of this invention, the bracket includes a clamping plate, and the active pawl and the anti-return pawl are located between the clamping plate and the drive rod. Positioning the active pawl and the anti-return pawl between the clamping plate and the drive rod limits their movement and reduces noise.

[0017] This utility model also discloses a rope tightening mechanism. Utilizing the aforementioned tightening mechanism, a rope connecting part is provided at the left end of the tightening rack. By providing the rope connecting part at the left end of the tightening rack, the rope to be tightened is connected to the rope connecting part. The active pawl pushes the tightening rack to the right, and the check pawl engages with the tightening rack, thus completing the rope tightening.

[0018] Preferably, in this invention, the rope connection part is a hook structure. One end of the rope can be directly hung on the hook structure, making it convenient to use.

[0019] This utility model also discloses a splits device, which utilizes the above-mentioned tensioning mechanism, including a support base, a leg support rod and a connecting rod, wherein the bracket is fixedly installed on the front side of the support base;

[0020] The two leg support rods are respectively installed on both sides of the bracket, and one end of each leg support rod is hinged to the support base or the bracket.

[0021] The connecting rod is hinged at both ends to the leg support rod and the tension rack, respectively. Since the connecting rod is hinged at both ends to the leg support rod and the tension rack, the user sits on the support base, places both legs on the leg support rod, and uses the active pawl to push the tension rack, causing the leg support rod to separate to both sides relative to the bracket, thereby controlling the leg separation angle. The connecting component uses a drive rod to apply a force to the active pawl and the check pawl, disengaging them from the teeth of the tension rack, thus facilitating the user to bring their legs together.

[0022] Preferably, in this invention, a roller is provided below the leg support rod, and a leg limiting groove is provided above the leg support rod. The roller below the leg support rod reduces the resistance when the leg support rod separates and reassembles; the leg limiting groove above the leg support rod helps to limit the position of the leg.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows: In the tensioning mechanism of this utility model, the tensioning rack is slidably mounted on the bracket, and the lower end of the drive rod and the upper end of the anti-return pawl are both hinged to the bracket through the first rotating shaft. The anti-return pawl engages with the tensioning rack and the engagement point is located on the right side of the drive rod, which is used to prevent the tensioning rack from sliding to the left. The active pawl of this invention is hinged at its upper end to the drive rod, and its lower end engages with the tensioning rack with the engagement point located on the right side of the drive rod. The active pawl is positioned above the check pawl. When the drive rod is rotated to the right, the active pawl pushes the tensioning rack to the right, overcoming the elastic force of the first elastic element and causing the check pawl to enter the tooth groove on the left side of the tensioning rack. When the drive rod stops rotating, the check pawl engages with the tensioning rack, preventing it from returning to the left. When the drive rod is rotated to the left, it overcomes the elastic force of the second elastic element, causing the active pawl to enter the tooth groove on the left side of the tensioning rack. Repeating these actions completes the unidirectional movement of the tensioning rack. The overall structure of this invention is simple; the unidirectional movement of the tensioning rack can be achieved simply by utilizing the drive rod, active pawl, check pawl, and tensioning rack in cooperation, thus completing the tensioning operation.

[0024] In this invention, the force-applying arm is connected to the check pawl and located on the left side of the drive rod. The force-applying arm is connected to the bracket through a first elastic element. The first elastic element is used to apply an upward pulling force to the force-applying arm, thereby ensuring that the check pawl presses against the tension rack. The driving pawl is connected to the force-applying arm through a second elastic element. The second elastic element is used to apply a force to the driving pawl against the tooth surface of the tension rack, thereby preventing the check pawl from disengaging from the tension rack and losing its check-back effect when the tension rack is not in a horizontal state, under the action of gravity. The driving pawl also disengages from the tension rack and loses its function of driving the tension rack.

[0025] In this invention, a connecting component is provided on the anti-return pawl, the lever arm, or the drive rod. The connecting component is used to enable the drive rod to apply a force to the active pawl and the anti-return pawl to disengage from the tooth surface of the tension rack, thereby releasing the engagement between the active pawl and the anti-return pawl and the tension rack, thus enabling the tension rack to move to the left. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the tensioning mechanism described in Embodiment 1 of this utility model;

[0027] Figure 2 This is a cross-sectional view of the tensioning mechanism described in an embodiment of the present utility model;

[0028] Figure 3 This is a schematic diagram of the tensioning mechanism described in Embodiment 2 of this utility model;

[0029] Figure 4 This is a schematic diagram of the tensioning mechanism described in Embodiment 3 of this utility model;

[0030] Figure 5 This is a schematic diagram of the rope tightening mechanism described in an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the splitting device described in an embodiment of the present invention;

[0032] In the diagram, 1 is the bracket, 11 is the limiting groove, and 12 is the clamping plate;

[0033] 2. Tightening rack; 21. Rope connection part;

[0034] 3 Active pawl, 4 Anti-return pawl, 5 Drive rod, 6 Force arm, 7 First elastic element, 8 Second elastic element;

[0035] 51 First rotating shaft, 52 Second rotating shaft, 9 Limiting protrusion;

[0036] 100 support base, 200 leg support rod, 300 connecting rod, 400 roller, 500 leg limiting groove. Detailed Implementation

[0037] The technical solutions in the embodiments of this utility model will now be clearly and completely described in conjunction with the accompanying drawings.

[0038] Example 1

[0039] like Figure 1 and Figure 2 As shown, a tensioning mechanism includes a bracket 1, a tensioning rack 2, an active pawl 3, a check pawl 4, a drive rod 5, a force-applying arm 6, a first elastic element 7, a second elastic element 8, and a connecting component. In this embodiment, the pressure angle of the left tooth surface of the tensioning rack 2 is smaller than the pressure angle of the right tooth surface.

[0040] The tension rack 2 is slidably mounted on the bracket 1.

[0041] The lower end of the drive rod 5 and the upper end of the anti-return pawl 4 are both hinged to the bracket 1 via the first rotating shaft 51.

[0042] The anti-return pawl 4 meshes with the tension rack 2, and the meshing point is located on the right side of the drive rod 5. The force-applying arm 6 is connected to the anti-return pawl 4 and is located on the left side of the drive rod 5. The force-applying arm 6 is connected to the bracket 1 through the first elastic element 7. The first elastic element 7 is used to give the force-applying arm 6 an upward pulling force, that is, to give the force-applying arm 6 a rightward torque, so that the anti-return pawl 4 presses against the right end face of the meshing teeth of the tension rack 2, preventing the anti-return pawl 4 from coming out of the tooth groove.

[0043] The upper end of the active pawl 3 is hinged to the drive rod 5, and the lower end of the active pawl 3 meshes with the tension rack 2 with the meshing point located on the right side of the drive rod 5. The active pawl 3 is positioned above the check pawl 4. The active pawl 3 is connected to the force-applying arm 6 via a second elastic element 8. The second elastic element 8 applies a force to the active pawl 3, pressing it against the tooth surface of the tension rack 2, thereby pressing the active pawl 3 against the right end face of the meshing teeth of the tension rack 2 and preventing the active pawl 3 from dislodging from the tooth groove. In this embodiment, the length of the active pawl 3 is greater than the length of the check pawl 4.

[0044] The anti-return pawl 4, the force-applying arm 6, or the drive rod 5 is provided with a connecting component, which is used to enable the drive rod 5 to apply a force to the active pawl 3 and the anti-return pawl 4 to disengage from the tooth surface of the tension rack 2.

[0045] The connecting component includes a second rotating shaft 52. The active pawl 3 is hinged to the drive rod 5 via the second rotating shaft 52. The second rotating shaft 52 is located above the force-applying arm 6. The distance between the first rotating shaft 51 and the second rotating shaft 52 is less than the length of the force-applying arm 6.

[0046] The bracket 1 is provided with a limiting groove 11 that matches the tension rack 2.

[0047] The first elastic element 7 and the second elastic element 8 are springs or elastic bands.

[0048] The bracket 1 includes a clamping plate 12, and the active pawl 3 and the anti-return pawl 4 are located between the clamping plate 12 and the drive rod 5.

[0049] Working principle: When the drive rod 5 is rotated to the right, the active pawl 3 pushes the tension rack 2 to the right, overcoming the elastic force of the first elastic element 7, and drives the check pawl 4 into the tooth groove on the left side of the tension rack 2. When the drive rod 5 is stopped, the check pawl 4 engages with the tension rack 2, thus preventing the tension rack 2 from returning to the left. When the drive rod 5 is rotated to the left, it overcomes the elastic force of the second elastic element 8, driving the active pawl 3 into the tooth groove on the left side of the tension rack 2. Repeating the above actions completes the unidirectional movement of the tension rack 2. The movement speed of the tension rack 2 can be controlled by controlling the rotation angle of the drive rod 5.

[0050] like Figure 5 As shown, a rope tightening mechanism utilizes the aforementioned tightening mechanism, with a rope connecting part 21 provided at the left end of the tightening rack 2. The rope to be tightened is fixed to the rope connecting part 21, and the tightening rack 2 is driven to the right by rotating the drive rod 5, thus completing the rope tightening. Furthermore, both the active pawl 3 and the anti-return pawl 4 engage with the tightening rack 2, preventing the rope from retracting.

[0051] The rope connection part 21 is a hook structure. The hook structure has an upward opening, which facilitates the hanging of the rope, and the hook structure is equipped with an anti-disengagement mechanism.

[0052] like Figure 6 As shown, a splits device, utilizing the aforementioned tensioning mechanism, includes a support base 100, a leg support rod 200, and a connecting rod 300. The bracket 1 is fixedly mounted on the front side of the support base 100, and the rotation drive rod 5 drives the tension rack 2 to move forward in the direction of one side of the support base 100. The support base 100 is used to support the user's buttocks.

[0053] The two leg support rods 200 are respectively arranged on both sides of the bracket 1, and one end of the leg support rod 200 is hinged to the support base 100.

[0054] The connecting rod 300 is hinged at both ends to the leg support rod 200 and the tension rack 2, respectively. In this embodiment, a connecting strip is provided below the end of the tension rack 2 to hinge the connecting rod 300 to the connecting strip.

[0055] A roller 400 is provided below the leg support rod 200, and a leg limiting groove 500 with an upward opening is provided above the leg support rod 200. In this embodiment, the roller 400 is a caster wheel.

[0056] The user sits on the support base 100 and fixes both legs to the leg support rod 200. By rotating the drive rod 5 to drive the tension rack 2, a pushing force is applied to separate the legs. When it is necessary to close the legs, the active pawl 3 and the anti-return pawl 4 can be disengaged from the tension rack 2 to release the pushing force of the tension rack 2, and the user can then use their own strength to close their legs.

[0057] Example 2

[0058] like Figure 3 As shown, the difference from Embodiment 1 is that the connecting component includes a limiting protrusion 9 provided on the anti-return pawl 4.

[0059] The drive rod 5 rotates to the left and contacts the limiting protrusion 9, lifting the anti-return pawl 4 and the active pawl 3.

[0060] The limiting protrusion 9 is a rod-shaped structure perpendicular to the side wall of the check pawl 4, and the limiting protrusion 9 is located on the right side of the drive rod 5.

[0061] Example 3

[0062] like Figure 4 As shown, the difference from Embodiment 1 is that the connecting component includes a limiting protrusion 9 disposed on the force-applying arm 6.

[0063] The drive rod 5 rotates to the left and contacts the limiting protrusion 9, lifting the anti-return pawl 4 and the active pawl 3.

[0064] Specifically, the limiting protrusion 9 is a rod-shaped structure perpendicular to the side wall of the force-applying arm 6, and the limiting protrusion 9 is located on the left side of the drive rod 5.

Claims

1. A tensioning mechanism, characterized in that: It includes a bracket (1), a tension rack (2), an active pawl (3), a check pawl (4), a drive rod (5), a force-applying arm (6), a first elastic element (7), a second elastic element (8), and a connecting component; The tension rack (2) is slidably mounted on the bracket (1); The lower end of the drive rod (5) and the upper end of the pawl (4) are both hinged to the bracket (1) via the first rotating shaft (51); The anti-return pawl (4) meshes with the tension rack (2) and the meshing point is located on the right side of the drive rod (5). The force-applying arm (6) is connected to the anti-return pawl (4) and is located on the left side of the drive rod (5). The force-applying arm (6) is connected to the bracket (1) through the first elastic element (7). The first elastic element (7) is used to give the force-applying arm (6) an upward pulling force. The upper end of the active pawl (3) is hinged to the drive rod (5), the lower end of the active pawl (3) meshes with the tension rack (2) and the meshing point is located on the right side of the drive rod (5), the active pawl (3) is located above the check pawl (4), the active pawl (3) is connected to the force arm (6) through the second elastic element (8), the second elastic element (8) is used to give the active pawl (3) a force pressing against the tooth surface of the tension rack (2); The anti-return pawl (4), the force-applying arm (6), or the drive rod (5) is provided with a connecting component, which is used to enable the drive rod (5) to apply a force to the active pawl (3) and the anti-return pawl (4) to disengage from the tooth surface of the tension rack (2).

2. The tensioning mechanism according to claim 1, characterized in that: The connecting component includes a second rotating shaft (52), and the active pawl (3) is hinged to the drive rod (5) via the second rotating shaft (52). The second rotating shaft (52) is located above the force-applying arm (6), and the distance between the first rotating shaft (51) and the second rotating shaft (52) is less than the length of the force-applying arm (6).

3. The tensioning mechanism according to claim 1, characterized in that: The connecting component includes a limiting protrusion (9) provided on the check pawl (4) or the force arm (6); The drive rod (5) rotates to the left and contacts the limiting protrusion (9), lifting the anti-return pawl (4) and the active pawl (3).

4. The tensioning mechanism according to claim 1, characterized in that: The bracket (1) is provided with a limiting groove (11) that matches the tension rack (2).

5. The tensioning mechanism according to claim 1, characterized in that: The first elastic element (7) and the second elastic element (8) are springs or elastic bands.

6. The tensioning mechanism according to claim 1, characterized in that: The bracket (1) includes a clamping plate (12), and the active pawl (3) and the anti-return pawl (4) are located between the clamping plate (12) and the drive rod (5).

7. A rope tensioning mechanism, utilizing the tensioning mechanism according to any one of claims 1 to 6, characterized in that: The left end of the tension rack (2) is provided with a rope connection part (21).

8. The rope tightening mechanism according to claim 7, characterized in that: The rope connection part (21) is a hook structure.

9. A splitting device, utilizing the tensioning mechanism according to any one of claims 1 to 6, characterized in that: It includes a support base (100), a leg support rod (200) and a connecting rod (300), and the bracket (1) is fixedly installed on the front side of the support base (100); The two leg support rods (200) are respectively arranged on both sides of the bracket (1), and one end of the leg support rod (200) is hinged to the support base (100) or the bracket (1); The two ends of the connecting rod (300) are respectively hinged to the leg support rod (200) and the tension rack (2).

10. The splitting device according to claim 9, characterized in that: A roller (400) is provided below the leg support rod (200), and a leg limiting groove (500) is provided above the leg support rod (200).

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