A buffer type tensioner

Abstract

The present invention relates to a buffer type tensioner in the field of cable installation technology. It aims at the technical problem that the existing tensioner cannot lock the ratchet immediately. It includes an L-shaped plate, the L-shaped plate is fixed with a hook, the side of the L-shaped plate away from the hook is rotatably connected to a rotating shaft, the rotating shaft is fixed with a first sleeve, the first sleeve is slidably connected to a sliding rod on the side away from the L-shaped plate, a sealing disk fixed to the sliding rod is slidably connected in the first sleeve, the end of the sliding rod away from the sealing disk is fixed with a second sleeve, the side of the second sleeve away from the sliding rod is provided with a push rod, the push rod is fixed with a wire clamp through a cable, the side of the first sleeve away from the sealing disk is slidably connected to a sliding disk, and the sliding disk is provided with a guide hole. The present invention uses hydraulic transmission to increase the continuity when stretching the cable, and locks the cable immediately after stopping the cable stretching, and does not cause the cable to retreat.

Description

Technical Field

[0001] The invention relates to the technical field of cable installation, and in particular to a buffer type tensioner. Background Art

[0002] After the cable is installed or has been used for a period of time, the cable will sag to varying degrees due to its own gravity or other reasons. At this time, the sagging cable should be repaired and fixed to avoid safety hazards caused by cable sagging.

[0003] At present, the cable is generally tightened by a tensioner, which uses the anti-reversal mechanism of the ratchet pawl. During the use of the tensioner, the operator first fixes the cable with a wire clamp and turns the ratchet with a wrench. The ratchet tightens the cable through the cable and the wire clamp. After the ratchet is rotated, the ratchet is clamped with the pawl. However, since the process of rotating the ratchet is completed manually by the operator, the operator cannot clamp the pawl near a tooth of the ratchet, and the pawl will be located between two teeth of the ratchet. When the operator stops turning the ratchet, the ratchet will rotate in the opposite direction for a certain angle and then be limited by the pawl, instead of being directly stopped by the pawl. This process will cause the cable to retreat and feel frustrated, resulting in excessive friction between the wire clamp and the cable, which can easily cause damage to the cable. Summary of the invention

[0004] The invention provides a buffer type tensioner to solve the technical problem that the existing tensioner cannot lock the ratchet wheel immediately.

[0005] The technical implementation scheme of the present invention is: a buffer type tensioner, including an L-shaped plate, the L-shaped plate is fixedly connected to a hook, the L-shaped plate is rotatably connected to a rotating shaft on a side away from the hook, the rotating shaft is fixedly connected to a first sleeve, the first sleeve is slidably connected to a sliding rod on a side away from the L-shaped plate, a sealing disk fixed to the sliding rod is slidably connected in the first sleeve, an end of the sliding rod away from the sealing disk is fixedly connected to a second sleeve, a push rod is provided on the side of the second sleeve away from the sliding rod, the push rod is fixedly connected to a wire clamp through a cable, a sliding disk is slidably connected to the side of the first sleeve away from the sealing disk, the sliding disk is provided with a guide hole, a one-way valve is provided in the guide hole, hydraulic oil is filled in the first sleeve, the sliding disk is provided with a pushing mechanism, the pushing mechanism is used to move the sliding disk, and the first sleeve is provided with a flow limiting component for guiding the hydraulic oil therein.

[0006] The locking mechanism further comprises an L-shaped rod, wherein the L-shaped rod is fixedly connected to a side of the sliding plate away from the sealing plate, the L-shaped rod is slidably connected to the first sleeve, a fixed shaft is fixedly connected to the upper side of the L-shaped plate, the fixed shaft of the L-shaped plate is rotatably connected to the fixing plate, the fixing plate is fixedly connected to a third sleeve, the third sleeve is slidably connected to a positioning rod, the third sleeve is provided with a first cavity, a disk fixed to the positioning rod is slidably connected in the first cavity, a through hole is provided on a side of the third sleeve close to the positioning rod, an end of the positioning rod away from the disk is hinged to the L-shaped rod, the fixed shaft of the L-shaped plate is rotatably connected to a swing rod located on the front side of the fixing plate, the third sleeve is provided with a connecting frame, a side of the connecting frame away from the third sleeve is fixedly connected to the swing rod, and an end of the L-shaped rod away from the sliding plate is located below the fixed shaft of the L-shaped plate.

[0007] Further, the current limiting assembly includes a "mountain" shaped tube, the "mountain" shaped tube is fixedly connected to the first sleeve, the "mountain" shaped tube connects the two sides and the middle of the first sleeve, the "mountain" shaped tube is filled with hydraulic oil, the branch pipe connecting part of the "mountain" shaped tube is rotatably connected to the first sphere, the "mountain" shaped tube is rotatably connected to the first knob fixed to the first sphere, a through hole is provided in the first sphere, and a one-way valve is provided in the through hole of the first sphere.

[0008] Furthermore, the through hole of the first sphere is a three-way hole, and the one-way valve in the three-way hole of the first sphere is located on a side thereof close to the rocker rod.

[0009] Furthermore, it also includes a detection mechanism, which is arranged on the second sleeve, and the detection mechanism is used to detect the tension of the cable. The detection mechanism includes a pressure plate, and the pressure plate is slidably connected in the second sleeve. The push rod and the second sleeve are slidably connected. A through hole is provided on the side of the second sleeve close to the sliding rod. The pressure plate is fixedly connected to the push rod, and a first spring is fixedly connected between the pressure plate and the second sleeve. The second sleeve is connected with a connecting sleeve, and the third sleeve is provided with a second cavity. The third sleeve is provided with a through groove connecting the first cavity and the second cavity, and the connecting sleeve is connected with a conduit connected to the second cavity. The second sleeve, the connecting sleeve, the conduit, the first cavity and the second cavity are all filled with hydraulic oil.

[0010] Furthermore, the connecting sleeve is rotatably connected to a second sphere, the second sphere is provided with a through hole, a one-way valve is provided in the through hole of the second sphere, the connecting sleeve is rotatably connected to a second knob fixed to the second sphere, a pressure storage assembly for storing hydraulic oil in the second cavity is provided in the third sleeve, and the rocker arm is provided with a sealing assembly for sealing the through groove.

[0011] Furthermore, the pressure storage assembly includes a push plate, which is slidably connected in the second cavity, a second spring is fixedly connected between the push plate and the third sleeve, and a through hole is provided on one side of the third sleeve close to the push plate.

[0012] Further, the blocking assembly includes a push plate, which is fixedly connected to the rocker arm, the third sleeve is provided with a guide hole connected to the through slot, the guide hole is slidably connected with an insertion rod which is extruded and matched with the push plate, the insertion rod is provided with a vertical hole which is connected and matched with the through slot, a third spring is fixedly connected between the insertion rod and the third sleeve, the connecting frame is extruded and matched with the third sleeve, and the positioning rod and the rocker arm are not aligned in the vertical direction.

[0013] Furthermore, the diameter of the guide hole on the side close to the connecting frame is smaller than the diameter of the guide hole on the side close to the push plate, and the guide hole is used to limit the insertion rod.

[0014] Furthermore, the distance between one end of the L-shaped rod away from the sliding plate and the fixed axis of the L-shaped plate is equal to the distance from the circular plate to the top of the third sleeve.

[0015] The beneficial effects of the present invention are as follows: the present invention optimizes the anti-reversal mechanism of the existing wire tensioner to alleviate the problem that when the wrench is rotated in the opposite direction, the pawl is located between the two teeth of the ratchet, causing the ratchet to be unable to be locked immediately and thus rotate in the opposite direction, causing the pulled cable to retreat with a sense of frustration, and increasing the wear between the wire clamp and the cable at the moment of jamming. Therefore, the present invention utilizes hydraulic transmission to increase the continuity when stretching the cable, and locks the cable immediately after stopping the cable stretching, and does not cause the cable to retreat. By sensing the tension of the cable, the resistance of the operator's hand is adjusted to improve the smoothness of the operator pulling the push rod, and automatically stops stretching the cable when the cable tension reaches a certain value, so as to avoid damage to the cable due to excessive stretching or insufficient tension to achieve the purpose of tightening the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0017] Figure 2 It is a cross-sectional view of the three-dimensional structure of the present invention;

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the pushing mechanism of the present invention;

[0019] Figure 4 It is an exploded view of the three-dimensional structure of the "mountain"-shaped tube and the first sphere of the present invention;

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the detection mechanism of the present invention;

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the plugging component of the present invention.

[0022] Figure markings: 1-L-shaped plate, 2-rotating shaft, 3-first sleeve, 4-sliding rod, 5-sealing disk, 6-second sleeve, 7-push rod, 8-sliding disk, 801-guide hole, 9-L-shaped rod, 10-fixed plate, 11-third sleeve, 1101-first cavity, 1102-second cavity, 1103-through groove, 1104-guide hole, 12-positioning rod, 13-disc, 14-rocker rod, 1401-connecting frame, 15-"mountain" shaped tube, 16-first sphere, 17-first knob, 18-pressure disk, 19-first spring, 20-connecting sleeve, 2001-second sphere, 2002-second knob, 21-conduit, 22-push disk, 23-second spring, 24-push plate, 25-insertion rod, 2501-vertical hole, 26-third spring. DETAILED DESCRIPTION

[0023] First of all, it should be pointed out that in the different described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosure contained in the entire description can be transferred to the same parts with the same reference numerals or the same component names. Selected positional descriptions in the description, such as top, bottom, lateral, etc., also refer to the directly described and shown figures and are transferred to the new positions in the case of a change in position.

[0024] Embodiment 1:

[0025] The present embodiment provides a buffer-type tensioner, which optimizes the anti-reversal mechanism of the existing tensioner to alleviate the problem that when the wrench is rotated in the opposite direction, the pawl is located between the two teeth of the ratchet, causing the ratchet to be unable to be locked immediately and thus rotate in the opposite direction, causing the pulled cable to retreat with a sense of frustration, and increasing the wear between the wire clamp and the cable at the moment of jamming. Therefore, the present embodiment uses hydraulic transmission to increase the continuity when stretching the cable, and locks the cable immediately after stopping the cable stretching, and does not cause the cable to retreat.

[0026] The above device Figure 1 and Figure 2As shown, it includes an L-shaped plate 1, a hook is fixedly connected to the right side of the L-shaped plate 1, a rotating shaft 2 is rotatably connected to the left side of the L-shaped plate 1, a first sleeve 3 is fixedly connected to the front end of the rotating shaft 2, a sliding rod 4 is slidably connected to the left side of the first sleeve 3, a sealing disk 5 fixed to the right end of the sliding rod 4 is slidably connected in the first sleeve 3, a second sleeve 6 is fixedly connected to the left end of the sliding rod 4, a push rod 7 is arranged on the left side of the second sleeve 6, and the push rod 7 is fixedly connected to a wire clamp through a cable (the figure is only for illustrating the wire clamp, and the specific structure of the wire clamp is not shown), a sliding disk 8 is slidably connected to the right side in the first sleeve 3, A guide hole 801 is provided on the upper side of the sliding disk 8, and a one-way valve is provided in the guide hole 801. The first sleeve 3 is filled with hydraulic oil. The hydraulic oil on the left side of the sliding disk 8 enters the right side of the sliding disk 8 through the one-way valve of the guide hole 801. The sliding disk 8 is provided with a pushing mechanism, and the pushing mechanism is used to move the sliding disk 8. The sliding disk 8 reciprocates left and right to drive the sealing disk 5 to move intermittently to the right. The sealing disk 5 drives the wire clamp to move to the right through the sliding rod 4, the second sleeve 6, the push rod 7 and the cable to tighten the cable. The first sleeve 3 is provided with a flow limiting component for guiding the hydraulic oil therein.

[0027] like Figure 2 , Figure 3 and Figure 6 As shown, the pushing mechanism includes an L-shaped rod 9, which is fixed to the right side of the sliding plate 8, and the L-shaped rod 9 is slidably connected to the right side of the first sleeve 3. The front part of the upper side of the L-shaped plate 1 is fixed with a fixed shaft, and the fixed shaft of the L-shaped plate 1 is rotatably connected to the fixed plate 10. The front part of the lower side of the fixed plate 10 is fixed with a third sleeve 11, and the upper side of the third sleeve 11 is slidably connected to a positioning rod 12. The upper side of the third sleeve 11 is provided with a first cavity 1101, and a disc 13 fixed to the lower end of the positioning rod 12 is slidably connected in the first cavity 1101. A through hole is provided on the upper side of the cylinder 11 (for balancing the pressure on the upper side of the disc 13 so that the disc 13 can move freely), the upper end of the positioning rod 12 is hinged to the right side of the L-shaped rod 9, the fixed axis of the L-shaped plate 1 is rotatably connected to the rocker arm 14 located on the front side of the fixed plate 10, and the third sleeve 11 is provided with a connecting frame 1401, the upper side of the connecting frame 1401 is fixedly connected to the lower side of the rocker arm 14, when the rocker arm 14 swings, the rocker arm 14 drives the third sleeve 11 to swing synchronously through the connecting frame 1401, and the right end of the L-shaped rod 9 is located on the front side below the fixed axis of the L-shaped plate 1.

[0028] like Figure 3 and Figure 4As shown, the flow limiting component includes a "mountain"-shaped tube 15, which is fixedly connected to the upper side of the first sleeve 3. The "mountain"-shaped tube 15 connects the two sides and the middle of the first sleeve 3. The "mountain"-shaped tube 15 is composed of three branches: left, middle and right. The "mountain"-shaped tube 15 is filled with hydraulic oil. The middle part of the upper side of the "mountain"-shaped tube 15 is rotatably connected to the first sphere 16. The "mountain"-shaped tube 15 is rotatably connected to the first knob 17 fixed to the rear side of the first sphere 16. A three-way hole is arranged in the first sphere 16. In the initial state, the three-way hole of the first sphere 16 connects the branches on the left and right sides of the "mountain"-shaped tube 15 and blocks the branch in the middle of the "mountain"-shaped tube 15. A one-way valve is arranged on the right side of the three-way hole of the first sphere 16. The hydraulic oil on the right side of the "mountain"-shaped tube 15 flows to the left through the one-way valve in the first sphere 16.

[0029] After the operator has fixed the hook, he clamps the cable with a wire clamp, and then the operator pushes the upper side of the swing rod 14 to swing left and right. Taking the upper side of the swing rod 14 to the left as an example, the swing rod 14 drives the connecting frame 1401 to rotate counterclockwise around the fixed axis of the L-shaped plate 1, and the connecting frame 1401 drives the third sleeve 11, the fixed plate 10, the positioning rod 12 and the disc 13 to rotate counterclockwise around the fixed axis of the L-shaped plate 1. Since the upper end of the positioning rod 12 is located below the fixed axis of the L-shaped plate 1, the upper end of the positioning rod 12 will move to the right, and the upper end of the positioning rod 12 drives the sliding plate 8 to move to the right through the L-shaped rod 9. The pressure on the left side of the sliding plate 8 decreases and the pressure on the right side increases. The one-way valve in the guide hole 801 is closed, and the sliding plate 8 squeezes the hydraulic oil on its right side into the right branch of the "mountain" shaped tube 15. In the initial state, the state of the first sphere 16 and the "mountain" shaped tube 15 is as shown in the figure. Figure 4 As shown, the three-way hole of the first sphere 16 enables the left and right side branches of the "mountain" shaped tube 15 to be connected, while the lower side branch is blocked. At this time, the one-way valve on the right side of the three-way hole of the first sphere 16 is opened, and the hydraulic oil entering from the right side of the "mountain" shaped tube 15 passes through the three-way hole of the first sphere 16 and enters the left side of the "mountain" shaped tube 15, and finally enters the left side of the sealing disk 5 in the first sleeve 3. In the process of the sliding disk 8 moving to the right, the sliding disk 8 drives the sealing disk 5 to move to the right through the hydraulic oil between it and the sealing disk 5. At the same time, the hydraulic oil entering the first sleeve 3 from the left side of the "mountain" shaped tube 15 pushes the sealing disk 5 to move to the right. The sealing disk 5 drives the wire clamp to move to the right through the sliding rod 4, the second sleeve 6, the push rod 7, and the cable. The wire clamp pulls the cable to move to the right, so that the cable is tightened.

[0030] When the upper side of the rocker arm 14 no longer moves to the left, the sliding disk 8 no longer drives the sealing disk 5 to move to the right through the hydraulic oil between it and the sealing disk 5. At this time, the cable will apply a pulling force to the left to the sealing disk 5 through the wire clamp, cable, push rod 7, second sleeve 6 and slide rod 4. The pressure of the hydraulic oil on the left side of the sealing disk 5 and the hydraulic oil in the left branch of the "mountain" shaped tube 15 are increased, and the one-way valve in the three-way hole of the first sphere 16 is closed. The hydraulic oil on the left side of the sealing disk 5 cannot flow, so the sealing disk 5 cannot move to the left. At this time, the cable will not move backward when the cable is not stretched.

[0031] When the upper side of the rocker arm 14 moves to the right, the sliding plate 8 starts to move to the left, the pressure on the left side of the sliding plate 8 increases, and the pressure on the right side decreases, the one-way valve in the guide hole 801 opens, and the hydraulic oil on the left side of the sliding plate 8 gradually enters the right side of the sliding plate 8 through the guide hole 801. At this time, the sealing plate 5 remains stationary until the sliding plate 8 returns to its initial position.

[0032] After the cable stretching is completed, the operator removes the wire clamp, and then the operator rotates the first knob 17 counterclockwise by 90°, and the first knob 17 drives the first sphere 16 to rotate counterclockwise by 90°. At this time, the left branch and the middle branch of the "mountain" shaped tube 15 are connected, and the operator pulls the slide bar 4 to the left, and the slide bar 4 drives the sealing disk 5 to move to the left, and the sealing disk 5 releases the hydraulic oil on its left side through the left branch and the middle branch of the "mountain" shaped tube 15 into between the sealing disk 5 and the sliding disk 8.

[0033] Embodiment 2:

[0034] This embodiment senses the tension of the cable and adjusts the resistance of the operator's hand to improve the smoothness of the operator pulling the push rod 7, and automatically stops stretching the cable when the cable tension reaches a certain value to avoid damage to the cable due to excessive stretching or insufficient stretching force to achieve the purpose of tightening the cable.

[0035] On the basis of Example 1, Figure 2 , Figure 5 and Figure 6As shown, it also includes a detection mechanism, which is arranged in the second sleeve 6. The detection mechanism is used to detect the tension of the cable. The detection mechanism includes a pressure plate 18, which is slidably connected to the right side of the second sleeve 6, and the push rod 7 is slidably connected to the second sleeve 6. A through hole is arranged on the right side of the second sleeve 6 (for balancing the pressure, so that the pressure plate 18 can move freely in the second sleeve 6). The pressure plate 18 is fixedly connected to the right end of the push rod 7, and a first spring 19 is fixedly connected between the pressure plate 18 and the left side of the second sleeve 6. The first spring 19 is located on the right part of the outer side of the push rod 7. In the process of stretching the cable, the push rod 7 drives the pressure plate 18 to move to the left relative to the second sleeve 6, and the first spring 19 is compressed. The left side of the lower part of the second sleeve 6 is connected to the connecting sleeve 20, and the lower side of the third sleeve 11 is provided with a second cavity 1102, and the middle part of the third sleeve 11 is provided with a first cavity The through groove 1103 communicates with the second cavity 1102, the lower side of the connecting sleeve 20 is connected with a conduit 21 communicated with the second cavity 1102, the conduit 21 is a hose, the second sleeve 6, the connecting sleeve 20, the conduit 21, the first cavity 1101 and the second cavity 1102 are all filled with hydraulic oil, the middle part of the connecting sleeve 20 is rotatably connected with the second sphere 2001, the second sphere 2001 is provided with a through hole, and a one-way valve is provided in the through hole of the second sphere 2001, the hydraulic oil on the upper side of the connecting sleeve 20 enters the lower side of the connecting sleeve 20 through the one-way valve in the through hole of the second sphere 2001, the left side of the connecting sleeve 20 is rotatably connected with the second knob 2002 fixedly connected to the left side of the second sphere 2001, the third sleeve 11 is provided with a pressure storage assembly for storing the hydraulic oil in the second cavity 1102, and the rocker arm 14 is provided with a blocking assembly for blocking the through groove 1103.

[0036] like Figure 6 As shown, the pressure storage assembly includes a push plate 22, which is slidably connected to the lower side of the second cavity 1102. A second spring 23 is fixedly connected between the push plate 22 and the third sleeve 11. A through hole is provided on the lower side of the third sleeve 11. The hydraulic oil entering the second cavity 1102 through the conduit 21 will preferentially squeeze the push plate 22 downward, and the second spring 23 will be compressed.

[0037] like Figure 3 and Figure 6As shown, the blocking assembly includes a push plate 24, which is fixed to the right side of the lower part of the swing rod 14, and a guide hole 1104 connected to the through slot 1103 is provided in the middle of the third sleeve 11, and the aperture of the left side of the guide hole 1104 is smaller than the aperture of the right side, and the guide hole 1104 is used to limit the insertion rod 25, and the right side of the guide hole 1104 is slidably connected with the insertion rod 25 that is pressed and matched with the push plate 24, and the insertion rod 25 is provided with a vertical hole 2501 that is connected and matched with the through slot 1103. In the initial state, the vertical hole 2501 is not connected to the through slot 1103, and the first cavity 1101 and the second cavity 1103 are connected. The hydraulic oil in the cavity 1102 cannot circulate with each other. A third spring 26 is fixedly connected between the insertion rod 25 and the right side of the third sleeve 11. The connecting frame 1401 is squeezed and fitted with the third sleeve 11. The upper side of the positioning rod 12 is located on the front side below the fixed axis of the L-shaped plate 1, and is not directly below the fixed axis of the L-shaped plate 1. The distance between the upper end of the L-shaped rod 9 and the fixed axis of the L-shaped plate 1 is equal to the distance from the disc 13 to the top of the third sleeve 11. When the disc 13 moves to the top of the third sleeve 11, the central axis of the upper end of the L-shaped rod 9 coincides with the central axis of the fixed axis of the L-shaped plate 1.

[0038] The specific operation is as follows: during the process of the upper side of the swing rod 14 moving to the left (the process of the cable being stretched), the swing rod 14 squeezes the left side of the third sleeve 11 through the connecting frame 1401 and drives it to rotate counterclockwise around the fixed axis of the L-shaped plate 1, and the vertical hole 2501 is not connected to the through groove 1103. Therefore, the hydraulic oil content on the lower side of the disk 13 in the first cavity 1101 remains unchanged, and the distance between the upper end of the positioning rod 12 and the fixed axis of the L-shaped plate 1 remains unchanged. During the process of the cable being stretched, the tension of the cable continues to increase. At this time, relative sliding will occur between the push rod 7 and the second sleeve 6, and the push rod 7 drives the pressure plate 18 to move to the left relative to the second sleeve 6. The first spring 19 is compressed, and the pressure on the left side of the pressure plate 18 and the upper side of the connecting sleeve 20 increases. The one-way valve in the second sphere 2001 opens, and the hydraulic oil on the left side of the pressure plate 18 enters the second cavity 1102 through the conduit 21. The amount of hydraulic oil in the second cavity 1102 increases, pushing the push plate 22 to move downward, and the second spring 23 is compressed, temporarily storing the hydraulic oil in the second cavity 1102.

[0039] When the upper side of the swing rod 14 moves to the right, the swing rod 14 drives the connecting frame 1401 and the push plate 24 to rotate clockwise around the fixed axis of the L-shaped plate 1, and the lower side of the connecting frame 1401 moves away from the third sleeve 11 and no longer squeezes it, and the push plate 24 squeezes the insertion rod 25 to move to the left, and the third spring 26 is compressed. When the vertical hole 2501 is connected with the through groove 1103, the insertion rod 25 is limited by the guide hole 1104 and cannot continue to move to the left. At this time, the through groove 1103 is no longer blocked, and the second spring 23 in the compressed state resets to drive the push plate 22 to move upward, and the hydraulic oil on the upper side of the push plate 22 enters the first cavity 1101 through the through groove 1103 and the vertical hole 2501. The hydraulic oil entering the first cavity 1101 pushes the disc 13 to move upward, and the disc 13 drives the positioning rod 12 to move upward, and the positioning rod 12 drives the right side of the L-shaped rod 9 to move upward, and the distance between the right side of the L-shaped rod 9 and the fixed axis of the L-shaped plate 1 is reduced. The above process is equivalent to the principle of a lever, which reduces the arm length of the resistance arm (the distance between the right side of the L-shaped rod 9 and the fixed axis of the L-shaped plate 1) to reduce the power (the thrust of the push rod 7), so that the thrust of the operator when pushing the push rod 7 next time is reduced, which is convenient for the operator to stretch the cable with a larger tension, and then the lower side of the push plate 24 pushes the third sleeve 11 through the insertion rod 25 to continue to rotate clockwise around the fixed axis of the L-shaped plate 1.

[0040] When the upper side of the swing rod 14 moves to the left again, the swing rod 14 drives the connecting frame 1401 and the push plate 24 to rotate counterclockwise around the fixed axis of the L-shaped plate 1, and the lower side of the push plate 24 no longer squeezes the insertion rod 25. The third spring 26 in the compressed state resets and drives the insertion rod 25 to move to the right. The vertical hole 2501 is misaligned with the through groove 1103, and the first cavity 1101 is in a sealed state. The upper side of the swing rod 14 moves to the left, so that the position of the disk 13 in the third sleeve 11 remains unchanged, avoiding the positioning rod 12 and the disk 13 from being in the process of stretching the cable. The disk 13 moves up and down, affecting the stretching of the cable. Then the tensioner repeats the above steps continuously, increasing the cable tension while reducing the resistance of the operator's arm, assisting the cable stretching. Finally, the disk 13 is located at the top of the third sleeve 11, and the upper side of the positioning rod 12 and the right side of the L-shaped rod 9 are aligned with the fixed axis of the L-shaped plate 1 (the three are at the same height). After that, when the operator swings the push rod 7, the right side of the L-shaped rod 9 no longer moves and the cable will not be stretched. At this time, the tension of the cable reaches the specified value, avoiding damage to the cable due to excessive stretching.

[0041] After the cable stretching is completed, the operator removes the wire clamp and connects the vertical hole 2501 with the through groove 1103. Then the operator rotates the second knob 2002 180°, and the second knob 2002 drives the second sphere 2001 to rotate 180°. The one-way valve in the second sphere 2001 restricts the flow of fluid in the opposite direction. At this time, the first spring 19 in the compressed state resets and drives the pressure plate 18 to move to the right. The hydraulic oil in the first cavity 1101 returns to the second sleeve 6 through the through groove 1103, the vertical hole 2501, the second cavity 1102, the conduit 21 and the connecting sleeve 20.

[0042] Although the present invention is described in detail with reference to the above embodiments, it is obvious to those skilled in the art through this disclosure that various changes or modifications may be made to the present invention without departing from the principle and spirit of the present invention defined in the claims. Therefore, the detailed description of the embodiments of the present disclosure is only used to explain, not to limit the present invention, but the scope of protection is limited by the content of the claims.

Claims

1. A buffer type tensioner, comprising an L-shaped plate (1), the L-shaped plate (1) being fixedly connected to a hook, the side of the L-shaped plate (1) away from the hook being rotatably connected to a rotating shaft (2), the rotating shaft (2) being fixedly connected to a first sleeve (3), the side of the first sleeve (3) away from the L-shaped plate (1) being slidably connected to a sliding rod (4), a sealing disk (5) fixed to the sliding rod (4) being slidably connected inside the first sleeve (3), the end of the sliding rod (4) away from the sealing disk (5) being fixedly connected to a second sleeve (6), the side of the second sleeve (6) away from the sliding rod (4) being provided with a push rod (7), the push rod (7) being fixedly connected to a wire clamp via a cable, wherein: The invention also comprises a sliding disk (8), wherein the sliding disk (8) is slidably connected to a side of the first sleeve (3) away from the sealing disk (5), the sliding disk (8) is provided with a flow guide hole (801), a one-way valve is provided in the flow guide hole (801), the first sleeve (3) is filled with hydraulic oil, the sliding disk (8) is provided with a pushing mechanism, the pushing mechanism is used to move the sliding disk (8), and the first sleeve (3) is provided with a flow limiting component for guiding the hydraulic oil therein; The pushing mechanism comprises an L-shaped rod (9), the L-shaped rod (9) being fixedly connected to a side of the sliding plate (8) away from the sealing plate (5), the L-shaped rod (9) being slidably connected to the first sleeve (3), a fixed shaft being fixedly connected to the upper side of the L-shaped plate (1), the fixed shaft of the L-shaped plate (1) being rotatably connected to a fixed plate (10), the fixed plate (10) being fixedly connected to a third sleeve (11), the third sleeve (11) being slidably connected to a positioning rod (12), the third sleeve (11) being provided with a first cavity (1101), the first cavity (1101) being slidably connected to a member connected to the positioning rod (12) A fixed disc (13), a through hole is provided on a side of the third sleeve (11) close to the positioning rod (12), an end of the positioning rod (12) away from the disc (13) is hinged to the L-shaped rod (9), a fixed axis of the L-shaped plate (1) is rotatably connected to a swing rod (14) located on the front side of the fixed plate (10), the third sleeve (11) is provided with a connecting frame (1401), a side of the connecting frame (1401) away from the third sleeve (11) is fixedly connected to the swing rod (14), and an end of the L-shaped rod (9) away from the sliding disc (8) is located below the fixed axis of the L-shaped plate (1); The flow limiting assembly comprises a "mountain"-shaped tube (15), the "mountain"-shaped tube (15) being fixedly connected to the first sleeve (3), the "mountain"-shaped tube (15) connecting the two sides and the middle of the first sleeve (3), the "mountain"-shaped tube (15) being filled with hydraulic oil, a first ball (16) being rotatably connected to a branch pipe connecting portion of the "mountain"-shaped tube (15), the "mountain"-shaped tube (15) being rotatably connected to a first knob (17) fixedly connected to the first ball (16), a through hole being provided in the first ball (16), and a one-way valve being provided in the through hole of the first ball (16); The through hole of the first sphere (16) is a three-way hole, and the one-way valve in the three-way hole of the first sphere (16) is located on a side thereof close to the swing rod (14).

2. A buffer type tensioner according to claim 1, characterized in that: The cable also includes a detection mechanism, which is arranged in the second sleeve (6) and is used to detect the tension of the cable. The detection mechanism includes a pressure plate (18), which is slidably connected in the second sleeve (6). The push rod (7) and the second sleeve (6) are slidably connected. A through hole is arranged on a side of the second sleeve (6) close to the slide rod (4). The pressure plate (18) is fixedly connected to the push rod (7). A first spring (19) is fixedly connected between the pressure plate (18) and the second sleeve (6). The second sleeve (6) is connected to a connecting sleeve (20); the third sleeve (11) is provided with a second cavity (1102); the third sleeve (11) is provided with a through groove (1103) connecting the first cavity (1101) and the second cavity (1102); the connecting sleeve (20) is connected to a conduit (21) connected to the second cavity (1102); and the second sleeve (6), the connecting sleeve (20), the conduit (21), the first cavity (1101) and the second cavity (1102) are all filled with hydraulic oil.

3. A buffer type tensioner according to claim 2, characterized in that: The connecting sleeve (20) is rotatably connected to a second sphere (2001), the second sphere (2001) is provided with a through hole, a one-way valve is provided in the through hole of the second sphere (2001), the connecting sleeve (20) is rotatably connected to a second knob (2002) fixedly connected to the second sphere (2001), a pressure storage component for storing hydraulic oil in the second cavity (1102) is provided in the third sleeve (11), and the rocker arm (14) is provided with a blocking component for blocking the through groove (1103).

4. A buffer type tensioner according to claim 3, characterized in that: The pressure storage assembly comprises a push plate (22), the push plate (22) being slidably connected in the second cavity (1102), a second spring (23) being fixedly connected between the push plate (22) and the third sleeve (11), and a through hole being provided on a side of the third sleeve (11) close to the push plate (22).

5. A buffer type tensioner according to claim 4, characterized in that: The blocking assembly comprises a push plate (24), the push plate (24) is fixedly connected to the rocker arm (14), the third sleeve (11) is provided with a guide hole (1104) connected to the through slot (1103), the guide hole (1104) is slidably connected with an insertion rod (25) which is pressed and matched with the push plate (24), the insertion rod (25) is provided with a vertical hole (2501) which is connected and matched with the through slot (1103), a third spring (26) is fixedly connected between the insertion rod (25) and the third sleeve (11), the connecting frame (1401) is pressed and matched with the third sleeve (11), and the positioning rod (12) and the rocker arm (14) are not aligned in the vertical direction.

6. A buffer type tensioner according to claim 5, characterized in that: The diameter of the guide hole (1104) on the side close to the connecting frame (1401) is smaller than the diameter of the guide hole on the side close to the push plate (24), and the guide hole (1104) is used to limit the insertion rod (25).

7. A buffer type tensioner according to claim 6, characterized in that: The distance between the end of the L-shaped rod (9) away from the sliding plate (8) and the fixed axis of the L-shaped plate (1) is equal to the distance between the circular plate (13) and the top of the third sleeve (11).

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