Cable shock-proof hammer

Abstract

The present invention relates to the technical field of cable accessories, and specifically discloses a cable shock-proof hammer, comprising: a mounting fixture, a connecting rope, and hammer heads installed at both ends of the connecting rope, wherein the connecting ropes are two and parallel to each other, and a rotating shaft 1 and a rotating shaft 2 connecting the two are respectively fixedly installed at the middle and both ends of the two connecting ropes, the rotating shaft 1 is rotatably installed in the mounting fixture, and the hammer head is rotatably connected to the rotating shaft 2, and further comprising: two connecting rods, which are slidably installed on the front and rear sides of the mounting fixture, and the two ends of the connecting rods are respectively slidably connected to the two hammer heads in the horizontal direction and are hinged, and in an initial state, the two connecting ropes are located at the same height, and when the cable vibrates at a low frequency, the two ends of the connecting rope swing up and down to reduce the shock of the cable, and when the cable vibrates at a high frequency, the transmission component makes the two connecting ropes located on the same vertical plane, so that the tension generated by the unit bending angle of the connecting rope is larger, so as to adapt to high-frequency vibration.

Description

Technical Field

[0001] The invention relates to the technical field of cable accessories, and in particular to a cable shock-absorbing hammer. Background Art

[0002] Cable anti-vibration hammer is a device used to reduce cable vibration and prevent cable damage due to vibration. It is commonly used in power transmission and communication systems, especially in cable lines that span long distances or are laid in harsh environments. Cables may vibrate under the influence of wind, temperature changes, mechanical stress or other external factors. Cable anti-vibration hammer reduces damage to cables by absorbing and dispersing these vibrations.

[0003] A Chinese patent document with authorization announcement number CN110676787B discloses a cable shock-absorbing hammer, including a cable installation sleeve mounted on a cable, a weight balancing assembly, and a connecting plate for connecting the cable installation sleeve and the weight balancing assembly, wherein the cable installation sleeve includes a semi-arc bearing plate and a semi-arc pressure cover plate hinged to each other, and a hinge axis is provided between the semi-arc bearing plate and the semi-arc pressure cover plate; by providing two semi-arc bearing plates and semi-arc pressure cover plates hinged to each other, the pulling rod at the bottom of the semi-arc pressure cover plate is wrapped around the inner side of the pulling rod clamping plate on the connecting plate, which can form a pulling limit effect to prevent the semi-arc bearing plate from warping and loosening, and a limit pressure plate is provided between the two pulling rod clamping plates, so that the limit pressure plate fixes the pulling rod in the pulling rod clamping plate.

[0004] The elastic modulus of the existing cable shock-absorbing hammer connecting rope remains unchanged. Due to the influence of external factors on the cable, high-frequency vibration and low-frequency vibration may occur. When the cable vibrates at a low frequency, the elastic modulus of the connecting rope is smaller and can better absorb the low-frequency vibration. When the cable vibrates at a high frequency, the elastic modulus of the connecting rope is larger and can better absorb the low-frequency vibration. Therefore, the existing cable shock-absorbing hammer cannot adapt well to these two situations. Summary of the invention

[0005] The present invention provides a cable shock-absorbing hammer, aiming to solve the problem in the related art that the cable shock-absorbing hammer cannot adjust the shock-absorbing effect according to the high-frequency vibration and low-frequency vibration of the cable.

[0006] A cable shock-proof hammer, comprising: a mounting fixture, a connecting cable, and hammer heads mounted at both ends of the connecting cable, wherein the connecting cables are two and parallel to each other, and a first rotating shaft and a second rotating shaft connecting the two are respectively fixedly mounted at the middle and both ends of the two connecting cables, the first rotating shaft is rotatably mounted in the mounting fixture, and the hammer head is rotatably connected to the second rotating shaft, and further comprising:

[0007] Two connecting rods are slidably mounted on the front and rear sides of the mounting fixture, and the two ends of the connecting rods are respectively slidably connected with the two hammer heads in the horizontal direction and are hinged;

[0008] The transmission assembly includes two racks respectively fixedly connected to the connecting rod, a missing tooth portion is provided in the middle of the rack, the missing tooth portion corresponds to the input end of the transmission assembly in the initial state, the output torque direction of the output end is always clockwise, and a limiting structure is provided at the output end so that the maximum rotation angle of the output end is ninety degrees, the output end is connected to the rotating shaft, and the connecting rod slides relative to the mounting fixture to drive the output end to rotate;

[0009] A one-way damper is coaxially installed between the rotating shaft 1 and the mounting fixture to increase the resistance encountered by the rotating shaft 1 when it rotates counterclockwise;

[0010] The elastic reset member is installed between the rotating shaft 1 and the mounting fixture, and is used to reset the rotating shaft 1 to an initial position so that the two connecting cables are located at the same height.

[0011] In the initial state, the two connecting cables are at the same height. At this time, the tension generated by the bending unit angle of the two connecting cables is small. When the cable vibrates at a low frequency, the two ends of the connecting cables swing up and down to reduce the shock of the cable. When the cable vibrates at a high frequency, the transmission assembly rotates the shaft 90°, so that the two connecting cables are located on the same vertical plane. At this time, the tension generated by the bending unit angle of the two connecting cables is large, which is more effective in alleviating high-frequency vibrations.

[0012] Preferably, the transmission assembly also includes gear set 1 and gear set 2 which can respectively engage with the two racks, and one-way couplings are provided in gear set 1 and gear set 2, so that the rotation directions of the output ends of gear set 1 and gear set 2 are the same, and the output ends of gear set 1 and gear set 2 are both coaxially connected with the rotating shaft, and the up and down movement of the connecting rod relative to the mounting fixture is converted into torque that drives the rotating shaft to rotate in the same direction through gear set 1 and the gear set.

[0013] Preferably, gear set 1 includes gear 1 that can mesh with the rack, gear 1 is rotatably installed in the installation fixture, gear 1 is coaxially connected to gear 2 through a one-way coupling, gear 2 is meshed with a gear ring 1, gear ring 1 is coaxially fixedly connected to the rotating shaft, and the one-way coupling is used to make gear 1 rotate in two directions and drive gear 2 to rotate in one direction.

[0014] Preferably, gear set two includes gear three, gear four and ring gear two, and gear set two has the same structure as gear set one and is rotationally symmetrically arranged about a vertical line passing through the center of rotating shaft one, and the restricted rotation directions of the two one-way couplings in gear set one and gear set two are the same.

[0015] Preferably, the limiting structure includes tooth-missing groove 1 and tooth-missing groove 2 respectively provided on gear ring 1 and gear ring 2, so that the maximum rotation angle of gear ring 1 and gear ring 2 is 90°, thereby controlling the switching of the two connecting cables from being located at the same level to being located at the same vertical plane.

[0016] Preferably, in the initial state, the center angle of the arc formed by the meshing portion of the gear 2 with the gear ring 1 in the counterclockwise direction to the tooth-missing groove 1 is 90°, and the center angle of the arc formed by the meshing portion of the gear 4 with the gear ring 2 in the counterclockwise direction to the tooth-missing groove 1 is 90°.

[0017] Preferably, the mounting fixture is composed of a hook and a mounting shell, and the two are detachably connected, so as to facilitate assembly of the transmission component and thus facilitate production.

[0018] Preferably, hinge sleeves are slidably mounted on both ends of the connecting rod, and the two hinge sleeves are hinged to the two hammer heads respectively.

[0019] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0020] In the initial state, the two connecting cables are at the same height, and the two ends of the connecting cables swing up and down to reduce the shock of the cable. At this time, the tension generated by the bending unit angle of the two connecting cables is small, which is suitable for low-frequency vibration. When the cable vibrates at a high frequency, the rotating shaft 1 cannot be reset to the initial position, so that the rotating shaft rotates intermittently until it rotates 90°, and the tooth groove 1 and the tooth groove 2 on the gear ring 1 and the gear ring 2 move to the positions of gear 2 and gear 4 respectively, and the rotating shaft 1 no longer continues to rotate, so that the two connecting cables are located on the same vertical plane. At this time, the tension generated by the bending unit angle of the two connecting cables is large, which is better for reducing high-frequency vibration. When the vibration frequency decreases, the rotating shaft 1 gradually rotates counterclockwise to reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the initial state of the present invention.

[0022] Figure 2 It is a schematic diagram of the structure of the present invention when it adapts to high-frequency vibration.

[0023] Figure 3 This is a schematic diagram of the structure of the present invention after removing the mounting fixture.

[0024] Figure 4 It is a schematic diagram of the structure of the connecting cable in the present invention.

[0025] Figure 5 It is a front view of the transmission assembly in the present invention.

[0026] Figure 6 It is a structural schematic diagram of the transmission component in the present invention.

[0027] Reference numerals:

[0028] 1. Mounting fixture; 2. Connecting rope; 21. Rotating shaft 1; 22. Rotating shaft 2; 3. Hammer; 4. Connecting rod; 41. Articulated sleeve; 5. Transmission assembly; 51. Rack; 52. Gear set 1; 521. Gear 1; 522. Gear 2; 523. Gear ring 1; 53. Gear set 2; 531. Gear 3; 532. Gear 4; 533. Gear ring 2; 54. One-way coupling; 6. One-way damper; 7. Elastic reset member. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0030] like Figure 1 and Figure 6 As shown, a cable shock-absorbing hammer comprises a mounting fixture 1, two connecting cables 2, two hammer heads 3, a connecting rod 4, a transmission assembly 5, a one-way damper 6 and an elastic reset member 7. The top of the mounting fixture 1 is fixedly mounted on the cable through a pre-twisted wire, the two connecting cables 2 are parallel and in contact with each other, and the middle and both ends of the two connecting cables 2 are respectively fixedly mounted with a rotating shaft 1 21 and a rotating shaft 22 (such as Figure 4 As shown in the figure, the rotating shaft 21 is rotatably installed in the installation fixture 1, the hammer head 3 is rotatably connected to the rotating shaft 22, and the two connecting rods 4 are respectively slidably installed on the front and rear sides of the installation fixture 1, and both ends of the connecting rods 4 are slidably installed with hinge sleeves 41, and the two hinge sleeves 41 are respectively hinged to the two hammer heads 3. The transmission assembly 5 is installed inside the installation fixture 1 to control the rotating shaft 21 to rotate to a specific angle.

[0031] like Figure 6 As shown, the elastic reset member 7 is installed between the rotating shaft 21 and the mounting fixture 1, and is used to reset the rotating shaft 21 to the initial position. The elastic reset member 7 is preferably a spiral spring, the outer end of the spiral spring is connected to the mounting fixture 1, and the inner end is connected to the rotating shaft 21.

[0032] The one-way damper 6 is a liquid damper (or magnetic damper), so that the outer ring of the liquid damper is connected to the mounting fixture 1, and the inner ring is connected to the rotating shaft 21 through a one-way bearing, thereby increasing the resistance encountered by the rotating shaft 21 when it rotates counterclockwise to reset.

[0033] In the initial state (such as Figure 1 As shown in FIG. 2 ), the two connecting cables 2 are located at the same height. At this time, the tension generated by the bending unit angle of the two connecting cables 2 is small. When the cable vibrates at a low frequency, the two ends of the connecting cable 2 swing up and down to reduce the vibration of the cable. When the cable vibrates at a high frequency, the transmission component 5 rotates the shaft 21 by 90°, so that the two connecting cables 2 are located on the same vertical plane (as shown in FIG. 2 ). Figure 2As shown), at this time, the tension generated by the bending unit angle of the two connecting cables 2 is relatively large, so the effect of alleviating high-frequency vibration is better.

[0034] like Figure 1 and Figure 6 As shown, the mounting fixture 1 consists of a hook and a mounting shell, the mounting shell is divided into left and right halves, the transmission assembly 5, the one-way damper 6 and the elastic reset member 7 are installed in the mounting shell, and a plurality of equally spaced protrusions are provided on the top of the hook for connecting the hook and the cable together through pre-twisted wires.

[0035] like Figure 3 , Figure 5 and Figure 6 As shown, the transmission assembly 5 includes two racks 51, a gear set 1 52 and a gear set 2 53. The two racks 51 are symmetrically arranged and fixedly connected to the two connecting rods 4 respectively. A toothless portion is arranged in the middle of the rack 51. In the initial state, the toothless portion corresponds to the input end of the gear set 1 52 / gear set 2 53. When the cable vibrates, the hammer head 3 swings to form a height difference relative to the mounting fixture 1, so that the connecting rod 4 is lifted and lowered on the mounting fixture 1, thereby causing the rack 51 to lift and lower, thereby driving the gear set 1 52 and the gear set 2 53 to operate. The output ends of the gear set 1 52 and the gear set 2 53 always output torque in one direction. When low-frequency vibration occurs, the interval time for the gear set 1 52 and the gear set 2 53 to output torque is long, so the elastic reset member 7 resets the rotating shaft 1 21 which rotates at a smaller angle. At this time, the two connecting cables 2 are always approximately at the same height. When high-frequency vibration occurs, the rotating shaft 1 21 has no time to reset, so that the rotating shaft 1 21 rotates slowly intermittently, and finally the two connecting cables 2 are approximately on the same vertical plane.

[0036] like Figure 5 and Figure 6 As shown, gear set 1 52 includes gear 1 521, gear 2 522, gear ring 1 523 and one-way coupling 54. Gear 1 521 can mesh with one of the racks 51. Gear 1 521 is coaxially connected with gear 2 522 through the one-way coupling 54. The one-way coupling 54 is used to limit gear 1 521 from rotating counterclockwise relative to gear 2 522. Gear 2 522 meshes with gear ring 1 523. A toothless groove 1 is provided on gear ring 1 523. In the initial state, the center angle of the arc formed by the meshing part of gear 2 522 and gear ring 1 523 in the counterclockwise direction to the toothless groove 1 is 90°. Therefore, when high-frequency vibration occurs, after the rotating shaft 21 rotates 90°, gear 2 522 no longer meshes with gear ring 1 523, thereby keeping the rotating shaft 21 in the position of rotating 90°.

[0037] Continue to refer to Figure 5 and Figure 6, gear set 2 53 includes gear 3 531, gear 4 532, gear ring 2 533 and another one-way coupling 54. Gear set 2 53 has the same structure as gear set 1 52 and is rotationally symmetrically arranged with a vertical line passing through the center of rotating shaft 1 21. Gear 2 522 can mesh with another rack 51. The one-way coupling 54 in gear set 2 53 is used to limit gear 3 531 from rotating counterclockwise relative to gear 4 532. In the initial state, the center angle of the arc formed by the meshing part of gear 4 532 with gear ring 2 533 in the counterclockwise direction to the tooth-missing groove 1 is 90°.

[0038] Working principle: In the initial state, the two connecting cables 2 are at the same height, and the two ends of the connecting cables 2 swing up and down to reduce the shock of the cable. At this time, the tension generated by the bending unit angle of the two connecting cables 2 is small, which is suitable for low-frequency vibration. When the cable vibrates, the hammer head 3 swings to form a height difference relative to the mounting fixture 1, so that the connecting rod 4 rises and falls on the mounting fixture 1, thereby causing the rack 51 to rise and fall. When the rack 51 rises, the gear 1 521 rotates clockwise. Since the one-way coupling 54 can only limit the gear 1 521 from rotating counterclockwise relative to the gear 2 522, the gear 2 522 does not rotate at this time, and the gear 3 531 rotates counterclockwise through the one-way coupling 54 to drive the gear 4 532 counterclockwise, so that the ring gear 2 533 rotates clockwise, so that the rotating shaft 1 21 rotates clockwise, and when the rack 51 descends, the gear 1 521 rotates counterclockwise, and the gear 2 522 rotates counterclockwise through the one-way coupling 54, so that the ring gear 2 533 rotates clockwise, so that the rotating shaft 2 1 continues to rotate clockwise, and at the same time, gear three 531 rotates clockwise, and gear four 532 does not rotate due to the one-way coupling 54. When gear one 521 and gear three 531 move to the missing tooth portion on the rack 51 and disengage, the elastic reset member 7 causes the rotating shaft 1 21 to rotate counterclockwise and reset. When the cable vibrates at a low frequency, since gear one 521 and gear three 531 stay at the missing tooth portion for a long time, the rotating shaft 1 21 can be completely reset to the initial position. When the cable vibrates at a high frequency, the rotating shaft 1 21 cannot be reset. The first gear 523 is rotated to the initial position, so that the rotating shaft 21 rotates intermittently until it rotates 90°, and the tooth-missing groove 1 and the tooth-missing groove 2 on the gear ring 1 523 and the gear ring 2 533 move to the positions of the gear 2 522 and the gear 4 532 respectively, and the rotating shaft 21 no longer rotates, so that the two connecting cables 2 are located on the same vertical plane. At this time, the tension generated by the bending unit angle of the two connecting cables 2 is larger, so that the effect of alleviating high-frequency vibration is better. When the vibration frequency decreases, the rotating shaft 21 gradually rotates counterclockwise to reset.

[0039] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A cable shock-proof hammer, comprising: The installation fixture, the connecting rope, and the hammer heads installed at both ends of the connecting rope are characterized in that the connecting ropes are two and parallel to each other, and the middle and both ends of the two connecting ropes are respectively fixedly installed with a rotating shaft 1 and a rotating shaft 2 connecting the two together, the rotating shaft 1 is rotatably installed in the installation fixture, and the hammer head is rotatably connected to the rotating shaft 2, and also includes: Two connecting rods are slidably mounted on the front and rear sides of the mounting fixture, and the two ends of the connecting rods are respectively slidably connected with the two hammer heads in the horizontal direction and are hinged; The transmission assembly includes two racks respectively fixedly connected to the connecting rod, a missing tooth portion is provided in the middle of the rack, the missing tooth portion corresponds to the input end of the transmission assembly in the initial state, the output torque direction of the output end is always clockwise, and a limiting structure is provided at the output end so that the maximum rotation angle of the output end is ninety degrees, the output end is connected to the rotating shaft, and the connecting rod slides relative to the mounting fixture to drive the output end to rotate; A one-way damper is coaxially installed between the rotating shaft 1 and the mounting fixture to increase the resistance encountered by the rotating shaft 1 when it rotates counterclockwise; The elastic reset member is installed between the rotating shaft 1 and the installation fixture, and is used to reset the rotating shaft 1 to an initial position so that the two connecting cables are located at the same height.

2. The cable shock-absorbing hammer according to claim 1, characterized in that: The transmission assembly also includes a gear set 1 and a gear set 2 which can be respectively meshed with the two racks. One-way couplings are provided in the gear set 1 and the gear set 2, so that the output ends of the gear set 1 and the gear set 2 have the same rotation direction, and the output ends of the gear set 1 and the gear set 2 are both coaxially connected with the rotating shaft.

3. The cable shock-absorbing hammer according to claim 2, characterized in that: The gear set 1 includes a gear 1 that can mesh with the rack. The gear 1 is rotatably installed in the installation fixture. The gear 1 is coaxially connected to the gear 2 through a one-way coupling. The gear 2 is meshed with a gear ring 1, and the gear ring 1 is coaxially fixedly connected with the rotating shaft.

4. The cable shock-absorbing hammer according to claim 3, characterized in that: Gear set 2 includes gear 3, gear 4 and gear ring 2, and gear set 2 has the same structure as gear set 1 and is rotationally symmetrically arranged about a vertical line passing through the center of rotating shaft 1. The restricted rotation directions of the two one-way couplings in gear set 1 and gear set 2 are the same.

5. The cable shock-absorbing hammer according to claim 4, characterized in that: The limiting structure includes a first missing tooth groove and a second missing tooth groove which are respectively arranged on the first gear ring and the second gear ring.

6. The cable shock-absorbing hammer according to claim 5, characterized in that: In the initial state, the center angle of the arc formed by the meshing part of the gear 2 and the gear ring 1 in the counterclockwise direction to the missing tooth groove 1 is 90°, and the center angle of the arc formed by the meshing part of the gear 4 and the gear ring 2 in the counterclockwise direction to the missing tooth groove 1 is 90°.

7. The cable shock-absorbing hammer according to any one of claims 1 to 6, characterized in that: The mounting fixture consists of a hook and a mounting shell, and the two are detachably connected.

8. The cable shock-absorbing hammer according to claim 1, characterized in that: Both ends of the connecting rod are slidably mounted with hinge sleeves, and the two hinge sleeves are hinged to the two hammer heads respectively.

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