An intelligent hydraulic stretcher and its hydraulic system

Abstract

The present invention discloses an intelligent hydraulic tensioner and its hydraulic system, which relate to the field of mechanical fastening technology, and can at least partially solve the problem in the prior art that the nut needs to be tightened manually, resulting in the failure to meet the tightening requirements and precision requirements after the nut is tightened, and the low efficiency caused by manual nut tightening. An intelligent hydraulic tensioner according to an embodiment of the present invention comprises a supporting bridge cylinder for being sleeved on the outside of the nut to be rotated, comprising a ratchet assembly arranged in the supporting bridge cylinder, the ratchet assembly comprising a ratchet piece A sleeved on the nut to be rotated and rotating synchronously therewith, and a ratchet piece B for driving the ratchet piece A to rotate in the same direction, the top of the ratchet piece A and the bottom of the ratchet piece B are provided with mutually matching annular ratchets; comprising a driving assembly, the driving assembly comprising a hydraulic driving assembly for driving the ratchet piece B to rotate repeatedly along its circumference.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical fastening, and in particular to an intelligent hydraulic stretcher and a hydraulic system thereof. Background Art

[0002] At present, the connection and fastening between mechanical devices and various equipment are all carried out through screws and nuts. The common method of fixing the nut to the screw is mainly to directly screw it onto the screw with a wrench manually.

[0003] In the mechanical field, another common tightening method is to use a hydraulic tensioner to assist in manually tightening the nut. When the hydraulic tensioner is used, it needs to be sleeved and rotated onto the screw through a pull rod, and then the oil pump generates oil pressure in the oil cylinder of the hydraulic tensioner. The oil pressure is used to push the pull rod, so that the pull rod generates an axial tensile force on the screw. At this time, the screw will undergo elastic deformation, and then the pull rod is manually inserted into the pull ring sleeved on the nut, and the pull ring is turned to tighten the nut.

[0004] In the prior art, since the tightening of nuts and bolts is mainly achieved through manual operation, and the manual torque is limited, about 100Nm, after the pulling force of the pull rod on the screw is released, the locking force of the nut often fails to meet the tightening requirements and precision requirements; secondly, when manually pulling the pull ring, it is necessary to repeatedly insert the pull rod into the hole of the pull ring and repeatedly pull the pull ring, resulting in low nut tightening efficiency.

[0005] In view of this, this application is hereby filed. Summary of the invention

[0006] The purpose of the present invention is to provide an intelligent hydraulic tensioner and its hydraulic system, which are used to solve the problems in the prior art that nuts need to be tightened manually, resulting in the nuts failing to meet the tightening requirements and precision requirements after tightening, as well as the low efficiency caused by manual nut tightening.

[0007] In order to solve the above technical problems, the present invention adopts the following solutions:

[0008] One aspect of the present invention provides an intelligent hydraulic tensioner, which is used for a supporting bridge cylinder sleeved outside a nut to be rotated, and includes a ratchet assembly arranged in the supporting bridge cylinder, the ratchet assembly includes a ratchet piece A sleeved on the nut to be rotated and rotated synchronously with the nut, and a ratchet piece B used to drive the ratchet piece A to rotate in the same direction, and the top of the ratchet piece A and the bottom of the ratchet piece B are provided with annular ratchets that are adapted to each other;

[0009] The utility model comprises a driving assembly, wherein the driving assembly comprises a hydraulic driving assembly for driving the ratchet member B to rotate repeatedly along its circumference.

[0010] Optionally, the driving assembly includes a crank arm fixed to the ratchet member B and rotating synchronously therewith;

[0011] The hydraulic drive assembly includes a hydraulic drive cylinder fixed on the supporting bridge tube, and a hydraulic piston that causes the ratchet piece B to repeatedly rotate along its circumference through a crank arm. The hydraulic piston is arranged in the hydraulic drive cylinder and is movably sealed therewith. Hydraulic chambers that are connected to the output end of the hydraulic pump are provided between both ends of the hydraulic drive cylinder and both ends of the hydraulic piston. The crank arm has an extension portion that penetrates the supporting bridge tube and extends into the hydraulic piston. An arc-shaped through hole is provided on the supporting bridge tube for the extension portion to swing along the circumference of the supporting bridge tube.

[0012] Optionally, the crank arm includes a fixed portion which is sleeved on the ratchet member B and rotates synchronously therewith, the fixed portion is fixedly connected to the extension portion, the hydraulic drive cylinder and the middle portion of the hydraulic piston are both provided with a recess for placing the extension portion, and the recess of the hydraulic drive cylinder is connected to the arc-shaped through hole.

[0013] Optionally, a detachable sealing end cover is provided at the end of the hydraulic drive cylinder.

[0014] Optionally, the hydraulic drive cylinder and the hydraulic piston are both linear structures, and also include a guide column that passes through the bottom of the hydraulic drive cylinder and is slidably connected to the bottom of the hydraulic piston.

[0015] Optionally, it also includes a guide end cover inserted in the supporting bridge tube and connected to the top thereof, the bottom of the guide end cover is inserted in the ratchet piece B and movably connected thereto, and an elastic pressure piece is also provided between the guide end cover and the ratchet piece B.

[0016] Optionally, it also includes a support member arranged on the top of the ratchet member B and fixedly connected thereto, and the crank arm is arranged on the ratchet member B at the bottom of the support member.

[0017] Optionally, it also includes an eccentric reset assembly, which includes a reset wrench located on the outside of the supporting bridge cylinder, an eccentric wheel located on the inside of the supporting bridge cylinder, and a connecting rod that passes through the supporting bridge cylinder, wherein both ends of the connecting rod are fixedly connected to the reset wrench and the eccentric wheel respectively, and the eccentric wheel is located at the bottom of the support member, and the difference between the major and minor axes of the eccentric wheel is greater than the ratchet height of the ratchet member B.

[0018] Another aspect of the present invention provides a hydraulic system, which is applied to any of the above-mentioned intelligent hydraulic tensioners, and includes a hydraulic drive path connected to the output end of the hydraulic pump; the hydraulic drive path includes a hydraulic drive branch A and a hydraulic drive branch B respectively connected to the two ends of the hydraulic drive component.

[0019] Optionally, it also includes a hydraulic stretching passage connected to the output end of the hydraulic pump, and the hydraulic stretching passage is divided into a hydraulic stretching branch connected to the hydraulic stretching cylinder and a hydraulic counting branch connected to the counter through a diverter.

[0020] Beneficial effects of the present invention:

[0021] An intelligent hydraulic tensioner of the present invention is used to be sleeved on a supporting bridge cylinder outside a nut to be rotated, including a ratchet assembly arranged in the supporting bridge cylinder, the ratchet assembly includes a ratchet piece A sleeved on the nut to be rotated and rotated synchronously with the nut, and a ratchet piece B used to drive the ratchet piece A to rotate in the same direction, and the top of the ratchet piece A and the bottom of the ratchet piece B are provided with mutually compatible annular ratchets; including a driving assembly, the driving assembly includes a hydraulic driving assembly used to drive the ratchet piece B to rotate repeatedly along its circumference.

[0022] The effects are as follows: by cooperating with each other, the ratchet part A and the ratchet part B, and providing a hydraulic drive assembly for driving the ratchet part B to rotate repeatedly along its circumference, the ratchet part A can be continuously rotated in the same direction during the repeated rotation of the ratchet part B, so that the nut located in the ratchet part A is gradually locked during the rotation of the ratchet part A, thereby realizing automatic locking of the nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the explosion structure of the first embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the main structure of the first embodiment of the present invention;

[0026] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of AA;

[0027] Figure 5 It is a left-side structural schematic diagram of the first embodiment of the present invention;

[0028] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure of the CC;

[0029] Figure 7 Schematic diagram of the top view of the ratchet member A in the first embodiment of the present invention;

[0030] Figure 8 Schematic diagram of the top view of the ratchet assembly in the first embodiment of the present invention;

[0031] Fig. 9 Schematic diagram of the liquid channel of the second embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 11-ratchet piece A, 111-through hole, 12-ratchet piece B, 13-support piece, 21-crank arm, 211-extension part, 212-fixed part, 22-hydraulic drive cylinder, 221-end cover, 222-guide column, 23-hydraulic piston, 24-notch, 3-elastic pressure piece, 4-guide end cover, 5-hydraulic stretching cylinder, 51-stretching cylinder body, 52-pull core, 53-piston, 61-diverter, 62-counter, 71-hydraulic drive branch A, 72-hydraulic drive branch B, 73-quick plug connector, 8-support bridge cylinder, 81-strip hole, 9-eccentric reset assembly, 91-reset wrench, 92-connecting rod, 93-eccentric wheel, 100-nut, 200-screw. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0035] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0036] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "opened", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments:

[0038] Embodiment 1:

[0039] like Figures 1 to 8As shown, an intelligent hydraulic tensioner is used to be sleeved on the supporting bridge cylinder 8 outside the nut 100 to be rotated, including a ratchet assembly arranged in the supporting bridge cylinder 8, the ratchet assembly includes a ratchet part A11 sleeved on the nut 100 to be rotated and rotated synchronously therewith, and a ratchet part B12 used to drive the ratchet part A11 to rotate in the same direction, and the top of the ratchet part A11 and the bottom of the ratchet part B12 are provided with mutually compatible annular ratchets; including a driving assembly, the driving assembly includes a hydraulic driving assembly for driving the ratchet part B12 to rotate repeatedly along its circumference.

[0040] like Figure 2 , Figure 8 As shown, the annular ratchet comprises an annular ratchet A disposed at the top of the ratchet piece A11 and an annular ratchet B disposed at the bottom of the ratchet piece B12, and the annular ratchet A and the annular ratchet B are adapted to each other. By sleeved the ratchet piece A11 on the nut 100 to be rotated and rotating synchronously with the nut 100, and driving the ratchet piece B12 cooperating with the ratchet piece A11 to rotate repeatedly along its circumference, the ratchet piece A11 can be continuously rotated in the same direction during the repeated rotation of the ratchet piece B12 along its circumference, so that the ratchet piece A11 can drive the nut 100 to rotate continuously in the same direction, so that the nut 100 is tightened or loosened; when the rotation direction of the ratchet piece A11 is the same as the tightening direction of the nut 100, the ratchet piece A11 and the intelligent hydraulic tensioner can automatically tighten the nut 100; conversely, when the rotation direction of the ratchet piece A11 is opposite to the tightening direction of the nut 100, the ratchet piece A11 and the intelligent hydraulic tensioner can automatically loosen the nut 100, and the rotation direction of the ratchet piece A11 is related to the direction of its ratchet. Therefore, the ratchet assembly and its intelligent hydraulic tensioner in this embodiment can automatically tighten or loosen the nut 100.

[0041] In the present embodiment, the structure in the driving assembly that drives the ratchet member B12 to rotate repeatedly is a hydraulic driving assembly. The hydraulic driving assembly can provide sufficient torque for tightening the nut 100, which is much greater than the 100Nm or so that can be achieved by manual tightening. Therefore, the overall concept of setting the ratchet assembly and the driving assembly can enable the nut 100 to be tightened or loosened automatically, especially the automated tightening of the nut 100, which can solve the problem that the nut 100 fails to meet the tightening requirements and precision requirements after being locked due to manual tightening, and solves the problem that manual tightening is time-consuming and labor-intensive.

[0042] In this embodiment, the ratchet part A11 is a ratchet ring flange sleeved on the nut 100, and the annular ratchet A of the ratchet ring flange is arranged at the top thereof. The internal shape of the ratchet ring flange is adapted to the shape of the nut 100 to be rotated. Therefore, after the ratchet ring flange is sleeved on the nut 100 to be rotated, the ratchet ring flange can drive the nut 100 to be rotated to rotate synchronously. The ratchet part B12 is a ratchet clutch flange, and the annular ratchet B of the ratchet clutch flange is arranged at the bottom thereof, and the annular ratchet B at the bottom of the ratchet clutch flange is adapted to the annular ratchet A at the top of the ratchet ring flange. In this embodiment, the annular ratchet of the ratchet ring flange is in the opposite direction to the tightening direction of the nut 100. The ratchet assembly and its intelligent hydraulic tensioner in this embodiment are used for automatic tightening of the nut 100.

[0043] Specifically, the driving assembly includes a crank arm 21 fixed on the ratchet part B12 and rotating synchronously therewith; the hydraulic driving assembly includes a hydraulic driving cylinder 22 fixed on the supporting bridge tube 8, and a hydraulic piston 23 that causes the ratchet part B12 to repeatedly rotate along its circumference through the crank arm 21. The hydraulic piston 23 is arranged in the hydraulic driving cylinder 22 and is movably sealed therewith. Hydraulic chambers connected to the output end of the hydraulic pump are provided between both ends of the hydraulic driving cylinder 22 and both ends of the hydraulic piston 23. The crank arm 21 has an extension portion 211 that radially penetrates the supporting bridge tube 8 along the supporting bridge tube 8 and extends into the hydraulic piston 23. In this embodiment, an arc-shaped through hole is provided on the supporting bridge tube 8 for the crank arm 21 to swing along the circumference of the supporting bridge tube 8.

[0044] In this embodiment, the hydraulic pump connected to the hydraulic chambers at both ends of the hydraulic drive cylinder 22 is an oil pressure pump. The hydraulic chambers at both ends of the hydraulic drive cylinder 22 are connected to the output ends of the oil pressure pump, so that the hydraulic chambers can receive the hydraulic oil pumped out from the output ends of the oil pressure pump, so that the hydraulic piston 23 is continuously moved repeatedly in the hydraulic drive cylinder 22 under the push of the hydraulic pressure difference of the hydraulic oil at both ends. Since the extension portion 211 of the crank arm 21 extends into the hydraulic piston 23, the extension portion 211 of the crank arm 21 will be repeatedly pushed with the repeated movement of the hydraulic piston 23. At the same time, since the crank arm 21 in the driving assembly rotates synchronously with the ratchet part B12, the hydraulic piston 23 can push the ratchet part B12 to rotate repeatedly along its circumference through the crank arm 21, and the repeated rotation of the ratchet part B12 can drive the ratchet part A11 matched with it to rotate continuously in the same direction, thereby tightening the nut 100 that rotates synchronously with the ratchet part A11.

[0045] Specifically, the crank arm 21 includes a fixed portion 212 that is sleeved on the ratchet member B12 and rotates synchronously therewith, the fixed portion 212 is fixedly connected to the extension portion 211, and the middle portions of the hydraulic drive cylinder 22 and the hydraulic piston 23 are provided with a recess 24 for placing the extension portion 211, and the recess of the hydraulic drive cylinder 22 is connected to the arc-shaped through hole.

[0046] In this embodiment, a supporting bridge tube 8 is further included. A mounting hole is provided on the supporting bridge tube 8 . The extending portion 211 of the crank arm 21 passes through the mounting hole and is located in the recess 24 .

[0047] like Figure 2 As shown, a plurality of teeth are arranged on the outer peripheral wall of the ratchet piece B12 in this embodiment, and the fixing portion 212 of the crank arm 21 is sleeve-shaped, and a plurality of teeth are arranged inside the sleeve, and the teeth on the inner peripheral wall of the fixing portion 212 of the crank arm 21 mesh with the teeth on the outer peripheral wall of the ratchet piece B12. Since the ratchet piece B12 and the fixing portion 212 of the crank arm 21 mesh with each other, the ratchet piece and the crank arm 21 can rotate synchronously, and at the same time, they are easy to install and disassemble, and are convenient for subsequent maintenance and replacement of parts. In this embodiment, as shown in FIG. Figure 2 As shown, washers are provided above and below the fixing portion 212 of the crank arm 21 .

[0048] like Figure 1 and Figure 2 As shown, the hydraulic drive cylinder 22 and the hydraulic piston 23 are both provided with a recess 24 in the middle, and the recess 24 includes a sleeve recess and a piston recess. The extension portion 211 of the crank arm 21 passes through the supporting bridge tube 8 and the sleeve recess in sequence and extends into the piston recess. Therefore, during the repeated movement of the hydraulic piston 23 in the hydraulic drive cylinder 22, the left and right walls of the piston recess 24 continuously push the extension portion 211 of the crank arm 21 to repeatedly swing along the circumference of the ratchet piece B12.

[0049] In some embodiments, an inner screw hole may be further provided on the peripheral wall of the ratchet member B12, and the crank arm 21 may be directly threadedly connected to the ratchet member B12 through the inner screw hole of the ratchet member B12.

[0050] Specifically, a detachable sealing end cover 221 is provided at the end of the hydraulic drive cylinder 22. The detachable connection can be a threaded connection or a clamping connection; the sealing end cover 221 and the hydraulic drive cylinder 22 are detachably sealed, which can prevent oil leakage from the hydraulic chamber between the hydraulic drive cylinder 22 and the hydraulic piston 23. In this embodiment, an internal thread is provided on the inner peripheral wall of the end of the hydraulic drive cylinder 22, and an external thread matching the internal thread is provided on the end cover 221. The detachable connection between the end cover 221 and the hydraulic drive cylinder 22 is a threaded connection. As a conventional detachable method, the threaded connection is not only convenient to process, but also can withstand a sufficiently large axial hydraulic pressure, so that the hydraulic piston 23 can apply sufficient thrust to the crank arm 21 to drive the ratchet B12 to rotate.

[0051] Preferably, the hydraulic drive cylinder 22 and the hydraulic piston 23 are both linear structures, and further include a guide column 222 that penetrates the bottom of the hydraulic drive cylinder 22 and is slidably connected to the bottom of the hydraulic piston 23. In this embodiment, the hydraulic drive cylinder 22 and the hydraulic piston 23 are both linear structures, and the hydraulic piston 23 repeatedly swings along its axis in the hydraulic drive cylinder 22. The guide column 222 provided at the bottom of the hydraulic drive cylinder 22 can prevent the hydraulic piston 23 from rotating along its circumferential direction during the repeated swinging process, thereby affecting the transmission efficiency.

[0052] In some embodiments, the hydraulic drive cylinder 22 and the hydraulic piston 23 may also be an arc-shaped structure, that is, the hydraulic drive cylinder 22 and the hydraulic piston 23 are both arc-shaped, and the hydraulic piston 23 swings repeatedly with the center of the ratchet member B12 as the center.

[0053] Specifically, it also includes a guide end cover 4 inserted into the supporting bridge tube 8 and fixedly connected to the top thereof, the bottom of the guide end cover 4 is inserted into the ratchet piece B12 and movably connected thereto, and an elastic pressure piece 3 is also provided between the guide end cover 4 and the ratchet piece B12.

[0054] In this embodiment, the guide end cover 4 is fixed to the top of the supporting bridge tube 8 by means of a thread on its top, and the guide end cover 4 is coaxially arranged with the supporting bridge tube 8, the ratchet piece B12 is sleeved on the bottom of the guide end cover 4 and movably connected along its axial direction, and the elastic pressure piece 3 in this embodiment is a spring sleeved on the guide end cover 4, and the spring is arranged between the top of the ratchet piece B12 and the top of the guide end cover 4.

[0055] By providing a guide end cover 4 at the bottom of the hydraulic stretching cylinder 5 and providing an elastic pressing member 3 between the guide end cover 4 and the ratchet member B12, the ratchet member B12 is pressed downward during repeated rotations and forms a real-time, tight meshing relationship with the ratchet member A11, thereby avoiding the problem of insufficient meshing relationship between the ratchet member B12 and the ratchet member A11 due to the gravity of the ratchet member B12.

[0056] In this embodiment, when the ratchet part B12 drives the ratchet part A11 to rotate along the tightening direction of the nut 100, the rotation of the ratchet part B12 can directly drive the rotation of the ratchet part A11. After the ratchet part B12 rotates in the opposite direction of the tightening direction of the nut 100, the elastic pressing part can press the ratchet part B12 downward, so that the ratchet teeth at the bottom of the ratchet part B12 and the ratchet teeth at the top of the ratchet part A11 form a tight meshing relationship, thereby avoiding the ratchet part B12 and the ratchet part A11 from being not meshed tightly enough.

[0057] In this embodiment, it also includes a hydraulic stretching cylinder 5 arranged on the top of the supporting bridge tube 8. The hydraulic stretching cylinder 5 includes a pull core 52 that is sleeved on the screw 200 and threadedly connected thereto, and also includes a stretching cylinder body 51 and a piston 53. The piston 53 is movably and sealedly connected to the stretching cylinder body 51. A protrusion is provided on the top of the pull core 52. The top of the piston 53 presses on the protruding bottom surface of the top of the pull core 52. A stretching cylinder cavity for receiving hydraulic oil is provided between the stretching cylinder body 51 and the piston 53. By introducing hydraulic oil into the stretching cylinder cavity, the piston 53 can be pushed upward, thereby pushing the pull core 52 to lengthen the screw 200, so that the screw 200 forms an elastic deformation, which is convenient for tightening the nut 100.

[0058] Specifically, it also includes a support member 13 disposed on the top of the ratchet member B12 and fixedly connected thereto, and the crank arm 21 is disposed on the ratchet member B12 at the bottom of the support member 13 .

[0059] In this embodiment, the support member 13 is a support flange, and the fixed connection between the support member 13 and the top of the ratchet member B12 is a detachable fixed connection. Figure 2 As shown, the detachable fixed connection is a threaded connection.

[0060] By providing the support member 13, the structural strength of the ratchet member B12 can be improved, and the installation and disassembly of the above-mentioned crank arm 21 can be facilitated, thereby preventing the ratchet member B12 from being damaged or having its service life shortened due to insufficient structural strength when the hydraulic stretching cylinder extends along the circumference of the screw rod 200.

[0061] In some embodiments, the support member 13 and the ratchet member B12 can be an integrated structure, and an internal screw hole can be provided on the peripheral wall of the support member 13 and / or the ratchet member B12, and the crank arm 21 can be directly threadedly connected to the ratchet member B12 through the internal screw hole of the ratchet member B12 and / or the support member 13.

[0062] In some embodiments, the meshing point between the inner cylinder of the crank arm 21 and the outer cylinder of the ratchet member B12 is an involute spline meshing.

[0063] In some real-time examples, the ratchet teeth of the ratchet member B12 and the ratchet member B11 that mesh with each other may be end surface groove type or end surface arc type.

[0064] In some embodiments, the support member 13, the ratchet member B12 and the crank arm 21 can be an integrated structure. When the support member 13, the ratchet member B12 and the crank arm 21 are an integrated structure, a slot is provided on the support bridge tube 8 at the top thereof, and the extension portion 211 of the crank arm 21 is placed in the recess 24 of the hydraulic drive cylinder 22 and the hydraulic piston 23 through the slot.

[0065] Specifically, it also includes an eccentric reset assembly 9, which includes a reset wrench 91 located on the outside of the support bridge tube 8, an eccentric wheel 93 located on the inside of the support bridge tube 8, and a connecting rod 92 that penetrates the support bridge tube 8, the two ends of the connecting rod 92 are respectively fixedly connected to the reset wrench 91 and the eccentric wheel 93, the eccentric wheel 93 is located at the bottom of the support member 13, and the difference between the major and minor axes of the eccentric wheel 93 is greater than the ratchet height of the ratchet member B12. In this embodiment, the connecting rod 92 is integrally connected to the reset wrench 91, and the connecting rod 92 and the reset wrench 91 are L-shaped.

[0066] In this embodiment, when the ratchet part A11 is in a meshing state with the ratchet part B12, the short axis of the eccentric wheel 93 and the bottom of the support part 13 are close to or in contact with each other. When the meshing state between the ratchet part B12 and the ratchet part A11 needs to be released, the long axis of the eccentric wheel 93 is pressed against the bottom of the support part 13A. The difference in length between the long axis and the short axis of the eccentric wheel 93 is the rising height of the support part 13. Since the support part 13 is fixedly connected to the ratchet part B12, the difference in length between the long axis and the short axis of the eccentric wheel 93 is the rising height of the ratchet part B12. Therefore, when the difference in length between the long axis and the short axis of the eccentric wheel 93 is greater than the ratchet height of the ratchet part B12, rotating the eccentric wheel 93 can make the ratchet part A11 and the ratchet part B12 disengage from each other, so that the meshing state between the ratchet part A11 and the ratchet part B12 is released.

[0067] Therefore, by setting up the eccentric reset assembly 9, by twisting the reset wrench 91, the connecting rod 92 is driven to rotate, and then the eccentric wheel 93 can be rotated. When the long axis end of the eccentric wheel 93 presses the support member 13 upward, the meshing state of the ratchet member A11 and the ratchet member B12 can be released. When the meshing state of the ratchet member A11 and the ratchet member B12 is released, the ratchet member A11 can be moved by the pull rod, and the nut 100 can be rotated.

[0068] In this embodiment, a plurality of through holes 111 for pulling out the ring are evenly provided on the peripheral wall of the ratchet member A11, and a strip hole 81 is provided on the peripheral wall of the supporting bridge tube 8. The strip hole 81 is horizontally arranged, and the horizontal height of the strip hole 81 is the same as the horizontal height of the through hole 111 on the ratchet member A11. The angle A formed by the two ends of the strip hole 81 to the axis of the ratchet member A11 is greater than the angle B formed by the two adjacent through holes 111 of the ratchet member A11 to its axis. Therefore, when the ratchet member A11 is separated from the ratchet member B12, by passing the pulling rod through the strip hole 81 of the supporting bridge tube 8 and inserting it into the through hole 111 of the ratchet member A11, the ratchet member A11 can drive the nut 100 to rotate in the direction of loosening the nut 100 until the nut 100 is loosened.

[0069] In this embodiment, two eccentric reset assemblies 9 are symmetrically arranged on the supporting bridge tube 8. The two eccentric reset assemblies 9 can avoid uneven force when the eccentric wheel 93 presses the supporting member 13.

[0070] The usage process of this embodiment is as follows:

[0071] When using this embodiment, the support bridge tube 8 is pressed against the head of the screw rod 200, the ratchet piece A11 is sleeved on the nut 100, and then the pull core 52 is sleeved on the other end of the screw rod 200 away from the head of the screw rod 200 and tightened and fixed, and then hydraulic oil is introduced into the stretching cylinder cavity to push the piston 53 upward and make the piston 53 lift the pull core 52 upward. Since the pull core 52 is fixed to the screw rod 200, the screw rod 200 is elongated under the action of its elastic deformation, and the locking force between the nut 100 and the screw rod 200 is reduced, thereby reducing the torque driving the nut 100 to rotate.

[0072] After the screw rod 200 is elongated, hydraulic oil is introduced into the two hydraulic chambers at both ends of the hydraulic piston 23 respectively. Subsequently, the hydraulic oil in the two hydraulic chambers pushes the hydraulic piston 23 to move repeatedly in the hydraulic drive cylinder 22, so that the left and right walls of the recess 24 of the hydraulic piston 23 continuously push the extension portion 211 of the crank arm 21 to repeatedly swing along the circumference of the ratchet piece B12. During the repeated swinging of the ratchet piece B12, the ratchet piece A11 meshing with the ratchet piece B12 continuously rotates in a certain direction. Since the rotation direction of the ratchet piece A11 in this embodiment is the same as the tightening direction of the nut 100, and the ratchet piece A11 rotates synchronously with the nut 100, the ratchet piece can drive the nut 100 to rotate until the nut 100 is tightened.

[0073] Embodiment 2:

[0074] like Figures 1 to 9 As shown, this embodiment provides a hydraulic system, which is applied to the intelligent hydraulic tensioner described above, including a hydraulic drive path connected to the output end of the hydraulic pump; the hydraulic drive path includes a hydraulic drive branch A71 and a hydraulic drive branch B72 respectively connected to the two ends of the hydraulic drive component.

[0075] The hydraulic pump in this embodiment is an oil pump. One end of the hydraulic drive branch A71 and the hydraulic drive branch B72 in this embodiment are both connected to the output end of the oil pump, and the other end is connected to the hydraulic drive cylinder 22 in the hydraulic drive assembly. The hydraulic drive branch A71 and the hydraulic drive branch B72 are respectively connected to the hydraulic chambers at both ends of the hydraulic drive cylinder 22. The two hydraulic chambers of the hydraulic drive cylinder 22 receive the liquid pumped in by the oil pump through the hydraulic drive branch A71 and the hydraulic drive branch B72 respectively. At the same time, the hydraulic drive branch A71 and the hydraulic drive branch B72 are provided with solenoid valves, which are used to open and close the hydraulic drive branch A71 and the hydraulic drive branch B72. In this embodiment, the flowing liquids in the hydraulic drive branch A71 and the hydraulic drive branch B72 are both hydraulic oils. The oil pump and the hydraulic oil in this embodiment are both common knowledge in the art and will not be described in detail here.

[0076] Specifically, it also includes a hydraulic stretching path connected to the output end of the hydraulic pump. The hydraulic stretching path is divided into a hydraulic stretching branch connected to the hydraulic stretching cylinder 5 and a hydraulic counting branch connected to the counter 62 through a diverter 61 .

[0077] The overall concept of this embodiment is that the hydraulic piston 23 and the hydraulic stretching cylinder 5 in the hydraulic drive assembly are connected to the same oil pump through the hydraulic stretching passage and the hydraulic drive passage, and the hydraulic piston 23 and the hydraulic stretching cylinder 5 are driven in coordination by the same oil pump at the same time.

[0078] In this embodiment, Figure 2 As shown, a quick-connect connector 73 is provided on the diverter 61, one end of the hydraulic stretching passage is connected to the output end of the oil pump, and the other end is connected to the diverter 61 through the quick-connect connector 73. The hydraulic stretching passage is divided into a hydraulic stretching branch connected to the hydraulic stretching cylinder 5 and a hydraulic counting branch connected to the counter 62 through the diverter 61. The hydraulic oil of the hydraulic stretching branch is used to drive the hydraulic stretching cylinder 5, and the hydraulic oil of the hydraulic counting branch is used to record the number of stretching times of the hydraulic stretching cylinder 5. In some embodiments, the hydraulic counting branch can also be directly connected to the inner cylinder of the hydraulic stretching cylinder 5.

[0079] The principle of the counter 62 recording the number of stretching times of the hydraulic stretching cylinder 5 is as follows: when the hydraulic pressure in the hydraulic stretching branch reaches the set value, the hydraulic stretching cylinder 5 extends and causes the screw rod 200 to be stretched. Since the hydraulic stretching branch and the hydraulic counting branch are connected, the hydraulic pressure in the counter 62 reaches the set value at the same time, and the valve in the counter 62 is lifted and recorded once. When the hydraulic pressure in the hydraulic stretching branch and the hydraulic counting branch decreases, the valve in the counter 62 is reset and no record is made. Therefore, by setting the counter 62, the number of times the screw rod 200 is stretched can be automatically recorded, thereby indirectly realizing the recording of the number of nuts 100 locked.

[0080] In this embodiment, a quick-connect connector 73 is provided on the flow divider 61, and the hydraulic drive passage is connected to the flow divider 61 through the quick-connect connector 73. The flow divider 61, the quick-connect connector 73 and the counter 62 in this embodiment are all common knowledge and will not be described in detail here.

[0081] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. An intelligent hydraulic tensioner, used for a supporting bridge cylinder (8) sleeved on the outside of a nut to be rotated, characterized in that: The invention comprises a ratchet assembly arranged in a supporting bridge cylinder (8), the ratchet assembly comprising a ratchet member A (11) sleeved on a nut (100) to be rotated and rotating synchronously therewith, and a ratchet member B (12) used for driving the ratchet member A (11) to rotate in the same direction, and the top of the ratchet member A (11) and the bottom of the ratchet member B (12) are provided with annular ratchets that match each other; The drive assembly comprises a hydraulic drive assembly for driving the ratchet member B (12) to repeatedly rotate along its circumference; The driving assembly comprises a crank arm (21) fixed to the ratchet member B (12) and rotating synchronously therewith; The hydraulic drive assembly comprises a hydraulic drive cylinder (22) fixed on the supporting bridge tube (8), and a hydraulic piston (23) which causes the ratchet member B (12) to repeatedly rotate along its circumferential direction through a crank arm (21); the hydraulic piston (23) is arranged in the hydraulic drive cylinder (22) and is movably sealed therewith; hydraulic cavities which are connected to the output end of the hydraulic pump are arranged between the two ends of the hydraulic drive cylinder (22) and the two ends of the hydraulic piston (23); the crank arm (21) has an extension portion (211) which penetrates the supporting bridge tube (8) and extends into the hydraulic piston (23); and the supporting bridge tube (8) is provided with an arc-shaped through hole for the extension portion (211) to swing along the circumferential direction of the supporting bridge tube (8); The crank arm (21) comprises a fixed portion (212) sleeved on the ratchet member B (12) and rotating synchronously therewith, the fixed portion (212) being fixedly connected to the extension portion (211), the middle portions of the hydraulic drive cylinder (22) and the hydraulic piston (23) are both provided with a recess (24) for accommodating the extension portion (211), and the recess (24) of the hydraulic drive cylinder (22) is in communication with the arc-shaped through hole; It also includes a guide end cover (4) inserted into the supporting bridge tube (8) and fixedly connected to the top thereof, the bottom of the guide end cover (4) being inserted into the ratchet member B (12) and movably connected thereto, and an elastic pressure member (3) being provided between the guide end cover (4) and the ratchet member B (12); It also includes a support member (13) disposed on the top of the ratchet member B (12) and fixedly connected thereto, and the crank arm (21) is disposed on the ratchet member B (12) at the bottom of the support member (13); The invention also comprises an eccentric reset assembly (9), the eccentric reset assembly (9) comprising a reset wrench (91) located outside the supporting bridge cylinder (8), an eccentric wheel (93) located inside the supporting bridge cylinder (8), and a connecting rod (92) penetrating the supporting bridge cylinder (8), the two ends of the connecting rod (92) being fixedly connected to the reset wrench (91) and the eccentric wheel (93) respectively, the eccentric wheel (93) being located at the bottom of the supporting member (13), and the difference between the major and minor axes of the eccentric wheel (93) being greater than the ratchet height of the ratchet member B (12).

2. The intelligent hydraulic tensioner according to claim 1, characterized in that: A detachable sealing end cover (221) is provided at the end of the hydraulic drive cylinder (22).

3. The intelligent hydraulic tensioner according to claim 1, characterized in that: The hydraulic drive cylinder (22) and the hydraulic piston (23) are both linear structures, and also include a guide column (222) that penetrates the bottom of the hydraulic drive cylinder (22) and is slidably connected to the bottom of the hydraulic piston (23).

4. A hydraulic system, applied to an intelligent hydraulic tensioner as claimed in any one of claims 1 to 3, characterized in that: It comprises a hydraulic drive passage connected to the output end of the hydraulic pump; the hydraulic drive passage comprises a hydraulic drive branch A (71) and a hydraulic drive branch B (72) respectively connected to the two ends of the hydraulic drive assembly.

5. A hydraulic system according to claim 4, characterized in that: It also includes a hydraulic stretching passage connected to the output end of the hydraulic pump, and the hydraulic stretching passage is divided into a hydraulic stretching branch connected to the hydraulic stretching cylinder (5) and a hydraulic counting branch connected to the counter (62) through a flow divider (61).

Images