CN115383452A - Intelligent hydraulic stretcher and hydraulic system thereof - Google Patents

Abstract

The invention discloses an intelligent hydraulic stretcher and a hydraulic system thereof, relates to the technical field of mechanical fastening, and can at least partially solve the problems that in the prior art, a nut needs to be manually screwed, so that the fastening requirement and the precision requirement cannot be met after the nut is screwed, and the efficiency is low due to manual nut screwing. The intelligent hydraulic stretcher comprises a supporting bridge cylinder sleeved outside a nut to be rotated and a ratchet component arranged in the supporting bridge cylinder, wherein the ratchet component comprises a ratchet piece A sleeved on the nut to be rotated and synchronously rotated with the nut to be rotated and a ratchet piece B used for driving the ratchet piece A to rotate along the same direction; comprises a driving assembly which comprises a hydraulic driving assembly for driving the ratchet member B to rotate repeatedly along the circumferential direction thereof.

Description

Intelligent hydraulic stretcher and hydraulic system thereof

Technical Field

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

Background

At present, the connection and fastening between mechanical devices and various devices are performed through screw nuts. The conventional method for fixing the nut to the screw rod is mainly to screw the nut to the screw rod by a wrench directly by hand.

In the field of machinery, another common fastening mode is to utilize hydraulic stretching ware to assist the manual nut of screwing up, when hydraulic stretching ware used, need establish and rotate to the screw rod through the pull rod cover, produce the oil pressure in making hydraulic stretching ware's the hydro-cylinder afterwards through the oil pump, utilize the oil pressure to promote the pull rod, make the pull rod produce axial tensile force to the screw rod, at this moment, elastic deformation can take place for the screw rod, insert the pull rod by the manual work afterwards and locate the cover on the ring of pulling out of nut, and pull the ring and make the nut screwed up.

In the prior art, because the screwing of the nut and the bolt is mainly realized through manual operation, and the manual torque is limited, about 100Nm, after the pulling force of the pull rod on the screw rod is released, the locking force of the nut often cannot meet the fastening requirement and the precision requirement; secondly, when the pulling ring is pulled out manually, the pulling rod needs to be repeatedly inserted into the hole of the pulling ring and the pulling ring needs to be repeatedly pulled, so that the screwing efficiency of the nut is low.

In view of this, the present application is specifically made.

Disclosure of Invention

The invention aims to provide an intelligent hydraulic stretcher and a hydraulic system thereof, which are used for solving the problems that in the prior art, nuts need to be screwed manually, so that the fastening requirements and the precision requirements cannot be met after the nuts are screwed, and the efficiency is low due to manual nut screwing.

In order to solve the technical problem, the invention adopts the following scheme:

one aspect of the invention provides an intelligent hydraulic stretcher, which is used for a supporting bridge cylinder sleeved outside a nut to be rotated, and comprises a ratchet component arranged in the supporting bridge cylinder, wherein the ratchet component comprises a ratchet part A sleeved on the nut to be rotated and synchronously rotated with the nut to be rotated and a ratchet part B used for driving the ratchet part A to rotate along the same direction, and annular ratchets matched with each other are arranged at the top of the ratchet part A and the bottom of the ratchet part B;

comprises a driving assembly which comprises a hydraulic driving assembly for driving the ratchet member B to rotate repeatedly along the circumferential direction thereof.

Optionally, the driving assembly includes a crank arm fixed on the ratchet member B and rotating synchronously therewith;

the hydraulic drive assembly comprises a hydraulic drive cylinder fixed on the support bridge cylinder and a hydraulic piston which enables the ratchet piece B to repeatedly rotate along the circumferential direction of the ratchet piece B through a connecting lever, the hydraulic piston is arranged in the hydraulic drive cylinder and is movably and hermetically connected with the hydraulic drive cylinder, hydraulic cavities communicated with the output end of the hydraulic pump are arranged between the two ends of the hydraulic drive cylinder and the two ends of the hydraulic piston, the connecting lever is provided with an extending part which penetrates through the support bridge cylinder and extends into the hydraulic piston, and an arc-shaped through hole which is used for the extending part to circumferentially swing along the support bridge cylinder is formed in the support bridge cylinder.

Optionally, the crank arm includes a fixing portion sleeved on the ratchet member B and rotating synchronously therewith, the fixing portion is fixedly connected to the extension portion, the hydraulic driving cylinder and the hydraulic piston are provided with notches for placing the extension portion, and the notches of the hydraulic driving cylinder are communicated with the arc-shaped through hole.

Optionally, a detachable sealing end cover is arranged at the end of the hydraulic driving cylinder.

Optionally, the hydraulic drive cylinder and the hydraulic piston are both linear structures, and the hydraulic drive cylinder further comprises a guide post penetrating through the bottom of the hydraulic drive cylinder and slidably connected with the bottom of the hydraulic piston.

Optionally, the support bridge further comprises a guide end cover inserted into the support bridge cylinder and connected with the top of the support bridge cylinder, the bottom of the guide end cover is inserted into the ratchet member B and movably connected with the ratchet member B, and an elastic pressing member is further arranged between the guide end cover and the ratchet member B.

Optionally, the support is arranged on the top of the ratchet member B and fixedly connected with the ratchet member B, and the crank arm is arranged on the ratchet member B at the bottom of the support.

Optionally, the ratchet mechanism further comprises an eccentric reset assembly, the eccentric reset assembly comprises a reset wrench located on the outer side of the supporting bridge cylinder, an eccentric wheel located on the inner side of the supporting bridge cylinder and a connecting rod penetrating through the supporting bridge cylinder, two ends of the connecting rod are fixedly connected with the reset wrench and the eccentric wheel respectively, the eccentric wheel is located at the bottom of the supporting piece, and the difference between the long axis and the short axis of the eccentric wheel is larger than the ratchet height of the ratchet piece B.

Another aspect of the present invention provides a hydraulic system for use in any one of the above intelligent hydraulic stretchers, comprising a hydraulic drive path in communication with an output of the hydraulic pump; the hydraulic driving passage comprises a hydraulic driving branch A and a hydraulic driving branch B which are respectively communicated with two ends of the hydraulic driving assembly.

Optionally, the hydraulic stretching device further comprises a hydraulic stretching passage communicated with the output end of the hydraulic pump, and the hydraulic stretching passage is divided into a hydraulic stretching branch communicated with the hydraulic stretching cylinder and a hydraulic counting branch communicated with the counter through a flow divider.

The invention has the beneficial effects that:

the invention discloses an intelligent hydraulic stretcher which is used for a supporting bridge cylinder sleeved outside a nut to be rotated and comprises a ratchet component arranged in the supporting bridge cylinder, wherein the ratchet component comprises a ratchet part A sleeved on the nut to be rotated and synchronously rotated with the nut to be rotated and a ratchet part B used for driving the ratchet part A to rotate along the same direction, and annular ratchets matched with each other are arranged at the top of the ratchet part A and the bottom of the ratchet part B; comprises a driving assembly which comprises a hydraulic driving assembly for driving the ratchet member B to rotate repeatedly along the circumferential direction thereof.

The effect is as follows: through ratchet spare A and ratchet spare B of mutually supporting to the setting is used for driving ratchet spare B along its circumference and repeats the pivoted hydraulic drive subassembly, makes ratchet spare A constantly rotate along same direction at ratchet spare B in-process that rotates repeatedly, makes the nut that is located ratchet spare A locked gradually at ratchet spare A pivoted in-process, realizes the automatic locking of nut.

Drawings

FIG. 1 is a schematic diagram of an explosive structure according to a first embodiment of the present invention;

fig. 2 is a schematic perspective view of a first embodiment of the present invention;

FIG. 3 is a schematic front view of a first embodiment of the present invention;

FIG. 4 isbase:Sub>A schematic cross-sectional view of A-A of FIG. 3;

FIG. 5 is a left side view of the first embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of C-C of FIG. 5;

FIG. 7 is a schematic top view of a ratchet member A according to an embodiment of the present invention;

FIG. 8 is a top view of the ratchet assembly in accordance with one embodiment of the present invention;

fig. 9 is a schematic view of a fluid passage according to a second embodiment of the present invention.

Description of the reference numerals:

11-ratchet piece A, 111-through hole, 12-ratchet piece B, 13-supporting piece, 21-crank arm, 211-extending part, 212-fixing part, 22-hydraulic driving cylinder, 221-end cover, 222-guide column, 23-hydraulic piston, 24-notch, 3-elastic pressing piece, 4-guide end cover, 5-hydraulic stretching cylinder, 51-stretching cylinder body, 52-pull core, 53-piston, 61-flow divider, 62-counter, 71-hydraulic driving branch A, 72-hydraulic driving branch B, 73-quick connector, 8-supporting bridge cylinder, 81-strip-shaped hole, 9-eccentric reset component, 91-reset wrench, 92-connecting rod, 93-eccentric wheel, 100-nut and 200-screw rod.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", and the like indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, or that are conventionally placed when the product of the present invention is used, and are used only for convenience in describing and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "opened," "installed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The invention is explained in detail below with reference to the figures and with reference to embodiments:

the first embodiment is as follows:

as shown in fig. 1 to 8, an intelligent hydraulic tensioner for a supporting bridge cylinder 8 sleeved outside a nut 100 to be rotated comprises a ratchet assembly arranged in the supporting bridge cylinder 8, the ratchet assembly comprises a ratchet member a11 sleeved on the nut 100 to be rotated and synchronously rotated with the nut 100, and a ratchet member B12 for driving the ratchet member a11 to rotate in the same direction, wherein the top of the ratchet member a11 and the bottom of the ratchet member B12 are provided with annular ratchets which are matched with each other; comprises a driving assembly which comprises a hydraulic driving assembly for driving the ratchet member B12 to rotate repeatedly along the circumferential direction thereof.

As shown in fig. 2 and 8, the ring-shaped ratchet teeth include a ring-shaped ratchet tooth a arranged at the top of the ratchet member a11 and a ring-shaped ratchet tooth B arranged at the bottom of the ratchet member B12, and the ring-shaped ratchet tooth a and the ring-shaped ratchet tooth B are matched with each other. The ratchet piece A11 is sleeved on the nut 100 to be rotated and synchronously rotates with the nut 100, and meanwhile, the ratchet piece B12 matched with the ratchet piece A11 is driven to repeatedly and ceaselessly rotate along the circumferential direction of the ratchet piece A11, so that the ratchet piece A11 can continuously rotate in the same direction in the process that the ratchet piece B12 repeatedly rotates along the circumferential direction of the ratchet piece B12, the ratchet piece A11 can drive the nut 100 to continuously rotate in the same direction, and the nut 100 is screwed or unscrewed; when the rotation direction of the ratchet member a11 is the same as the screwing direction of the nut 100, the ratchet member a11 and the intelligent hydraulic stretcher can enable the nut 100 to be automatically screwed; on the contrary, when the rotation direction of the ratchet member a11 is opposite to the screwing direction of the nut 100, the ratchet member a11 and the intelligent hydraulic stretcher can automatically screw the nut 100, and the rotation direction of the ratchet member a11 is related to the direction of the ratchet thereof, so that the ratchet assembly and the intelligent hydraulic stretcher thereof in this embodiment can automatically screw or unscrew the nut 100.

In this embodiment, the structure for driving the ratchet member B12 to rotate repeatedly in the driving assembly is a hydraulic driving assembly, and the hydraulic driving assembly can provide sufficient torque for screwing the nut 100, which is much larger than about 100Nm that can be achieved by manual screwing, so that the overall concept of the ratchet assembly and the driving assembly is provided, and the nut 100 can be screwed or unscrewed automatically, especially the nut 100 can be screwed automatically, and the problems that the nut 100 cannot meet the fastening requirement and the precision requirement after being locked due to manual screwing can be solved, and the problems that manual screwing wastes time and labor are solved.

In this embodiment, the ratchet member a11 is a ratchet ring-pulling flange sleeved on the nut 100, the annular ratchet a of the ratchet ring-pulling flange is disposed at the top of the ratchet ring-pulling flange, and the internal shape of the ratchet ring-pulling flange is adapted to the shape of the nut 100 to be rotated, so that after the ratchet ring-pulling flange is sleeved on the nut 100 to be rotated, the ratchet ring-pulling flange can drive the nut 100 to be rotated to rotate synchronously, the ratchet member B12 is a ratchet clutch flange, the annular ratchet B of the ratchet clutch flange is disposed at the bottom of the ratchet ring-pulling flange, 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-pulling flange.

Specifically, the driving assembly comprises a crank arm 21 fixed on the ratchet member B12 and rotating synchronously therewith; the hydraulic driving assembly comprises a hydraulic driving cylinder 22 fixed on the supporting bridge cylinder 8, and a hydraulic piston 23 which enables the ratchet component B12 to repeatedly rotate along the circumferential direction of the ratchet component B through a crank arm 21, the hydraulic piston 23 is arranged in the hydraulic driving cylinder 22 and is movably and hermetically connected with the hydraulic driving cylinder, hydraulic cavities communicated with the output end of a hydraulic pump are arranged between the two ends of the hydraulic driving cylinder 22 and the two ends of the hydraulic piston 23, the crank arm 21 is provided with an extending part 211 which radially penetrates through the supporting bridge cylinder 8 along the supporting bridge cylinder 8 and extends into the hydraulic piston 23, and in the embodiment, an arc-shaped through hole which is used for the crank arm 21 to swing along the circumferential direction of the supporting bridge cylinder 8 is formed in the supporting bridge cylinder 8.

In this embodiment, the hydraulic pumps connected to the hydraulic chambers at the two ends of the hydraulic driving cylinder 22 are hydraulic pumps, the hydraulic chambers at the two ends of the hydraulic driving cylinder 22 are connected to the output end of the hydraulic pump, so that the hydraulic chambers can receive the hydraulic oil pumped from the output end of the hydraulic pump, and the hydraulic piston 23 is continuously and repeatedly moved in the hydraulic driving cylinder 22 under the pushing of the hydraulic pressure difference between the hydraulic oil at the two ends of the hydraulic piston 23, because the extending portion 211 of the crank arm 21 extends into the hydraulic piston 23, the extending portion 211 of the crank arm 21 can be repeatedly pushed along with the repeated movement of the hydraulic piston 23, and meanwhile, because the crank arm 21 in the driving assembly and the ratchet member B12 rotate synchronously, the hydraulic piston 23 can push the ratchet member B12 to rotate repeatedly along the circumferential direction thereof through the crank arm 21, and the ratchet member B12 can be rotated repeatedly to drive the ratchet member a11 adapted thereto to rotate continuously in the same direction, so that the nut 100 rotating synchronously with the ratchet member a11 is screwed.

Specifically, the crank arm 21 includes a fixing portion 212 that is sleeved on the ratchet member B12 and rotates synchronously therewith, the fixing portion 212 is fixedly connected with the extending portion 211, the middle portions of the hydraulic driving cylinder 22 and the hydraulic piston 23 are respectively provided with a notch 24 for placing the extending portion 211, and the notch of the hydraulic driving cylinder 22 is communicated with the arc-shaped through hole.

In this embodiment, the supporting bridge cylinder 8 is further included, a mounting hole is formed in the supporting bridge cylinder 8, and the extending portion 211 of the crank arm 21 penetrates through the mounting hole and is located in the notch 24.

As shown in fig. 2, the outer circumferential wall of the ratchet member B12 in this embodiment is provided with a plurality of teeth, the fixing portion 212 of the crank arm 21 is in a sleeve shape, and the sleeve is internally provided with a plurality of teeth, and the teeth on the inner circumferential wall of the fixing portion 212 of the crank arm 21 are engaged with the teeth on the outer circumferential wall of the ratchet member B12, because the ratchet member B12 and the fixing portion 212 of the crank arm 21 are engaged with each other, the ratchet member and the crank arm 21 can rotate synchronously, and the installation and the disassembly are convenient at the same time, so that the maintenance and the replacement of the subsequent parts are convenient. In the present embodiment, as shown in fig. 2, washers are provided above and below the fixing portion 212 of the crank arm 21.

As shown in fig. 1 and 2, the hydraulic drive cylinder 22 and the hydraulic piston 23 are respectively provided with a notch 24 in the middle, the notch 24 includes a sleeve notch and a piston notch, and the extending portion 211 of the crank arm 21 sequentially penetrates through the support bridge 8 and the sleeve notch and extends into the piston notch, so that during the repeated movement of the hydraulic piston 23 in the hydraulic drive cylinder 22, the left side wall and the right side wall of the piston notch 24 continuously push the extending portion 211 of the crank arm 21 to repeatedly swing along the circumferential direction of the ratchet member B12.

In some embodiments, the circumferential wall of the ratchet member B12 may be provided with an internal screw hole, and the crank arm 21 may be directly screwed with the ratchet member B12 through the internal screw hole of the ratchet member B12.

Specifically, the end of the hydraulic cylinder 22 is provided with a detachable end cover 221. The detachable connection can be a threaded connection and a clamping connection; the sealing end cover 221 is detachably and hermetically connected with the hydraulic driving cylinder 22, so that the situation that oil leaks from a hydraulic cavity between the hydraulic driving cylinder 22 and the hydraulic piston 23 can be avoided. In this embodiment, be provided with the internal thread on the tip internal perisporium of hydraulic drive cylinder 22, be provided with the external screw thread with internal thread looks adaptation on the end cover 221, the dismantled connection between end cover 221 and the hydraulic drive cylinder 22 is threaded connection, and threaded connection is as conventional detachable mode, and not only processing is convenient, can bear enough big axial hydraulic pressure simultaneously for hydraulic piston 23 can exert sufficient thrust to crank arm 21 and rotate in order to promote ratchet piece B12.

Preferably, the hydraulic cylinder 22 and the hydraulic piston 23 are both linear structures, and further include a guide post 222 penetrating the bottom of the hydraulic cylinder 22 and 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, the hydraulic piston 23 swings repeatedly in the hydraulic drive cylinder 22 along the axis thereof, and the guide column 222 arranged at the bottom of the hydraulic drive cylinder 22 can prevent the hydraulic piston 23 from rotating along the circumferential direction thereof to affect the transmission efficiency in the process of swinging repeatedly of the hydraulic piston 23.

In some embodiments, the hydraulic cylinder 22 and the hydraulic piston 23 may also be in an arc-shaped structure, that is, the hydraulic cylinder 22 and the hydraulic piston 23 are both in an arc shape, and the hydraulic piston 23 swings repeatedly around the center of the ratchet member B12.

Specifically, the support bridge further comprises a guide end cover 4 inserted in the support bridge cylinder 8 and fixedly connected with the top of the support bridge cylinder, the bottom of the guide end cover 4 is inserted in the ratchet piece B12 and movably connected with the ratchet piece B12, and an elastic pressing piece 3 is further arranged between the guide end cover 4 and the ratchet piece B12.

In this embodiment, the guide end cap 4 is fixed to the top of the support bridge tube 8 through a thread on the top of the guide end cap, the guide end cap 4 and the support bridge tube 8 are coaxially arranged, the ratchet member B12 is sleeved on the bottom of the guide end cap 4 and movably connected along the axial direction of the guide end cap, the elastic pressing member 3 in this embodiment is a spring sleeved on the guide end cap 4, and the spring is arranged between the top of the ratchet member B12 and the top of the guide end cap 4.

By arranging the guide end cover 4 at the bottom of the hydraulic stretching cylinder 5 and arranging the elastic pressing piece 3 between the guide end cover 4 and the ratchet piece B12, the ratchet piece B12 is pressed downwards and forms a real-time and tight meshing relation with the ratchet piece A11 in the repeated rotation process of the ratchet piece B12, and the problem that the meshing relation with the ratchet piece A11 is not tight enough due to the gravity of the ratchet piece B12 is avoided.

In this embodiment, when the ratchet member B12 drives the ratchet member a11 to rotate along the screwing direction of the nut 100, the rotation of the ratchet member B12 can directly push the rotation of the ratchet member a11, and after the ratchet member B12 rotates along the opposite direction of the screwing direction of the nut 100, the elastic pressing member can press the ratchet member B12 downward, so that the ratchet teeth at the bottom of the ratchet member B12 and the ratchet teeth at the top of the ratchet member a11 form a tight engagement relationship, thereby avoiding the situation that the engagement between the ratchet member B12 and the ratchet member a11 is not tight enough.

In this embodiment, the hydraulic stretching cylinder 5 is further included, the hydraulic stretching cylinder 5 is disposed at the top of the supporting bridge cylinder 8, the hydraulic stretching cylinder 5 includes a pull core 52, the pull core 52 is sleeved on the screw rod 200 and is in threaded connection with the screw rod, the stretching cylinder 51 and the piston 53 are further included, the piston 53 is movably and hermetically connected with the stretching cylinder 51, a protrusion is disposed at the top of the pull core 52, the top of the piston 53 abuts against the bottom surface of the protrusion at the top of the pull core 52, a stretching cylinder cavity for receiving hydraulic oil is disposed between the stretching cylinder 51 and the piston 53, the piston 53 can be pushed upwards by introducing hydraulic oil into the stretching cylinder cavity, and the pull core 52 is further pushed to elongate the screw rod 200, so that the screw rod 200 is elastically deformed, and the nut 100 can be screwed conveniently.

Specifically, the support device further comprises 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.

In this embodiment, the supporting member 13 is a supporting flange, and the fixed connection between the supporting member 13 and the top of the ratchet member B12 is a detachable fixed connection, as shown in fig. 2, the detachable fixed connection is a threaded connection.

Through setting up support piece 13, can improve ratchet piece B12's structural strength, and can be convenient for install in dismantling of above-mentioned crank arm 21, when avoiding the tensile cylinder of hydraulic pressure to extend along the circumference of screw rod 200, ratchet piece B12's structural strength leads to damaging or life shortens inadequately.

In some embodiments, the supporting member 13 and the ratchet member B12 may be an integral structure, the supporting member 13 and/or the ratchet member B12 may further have an internal screw hole on the peripheral wall thereof, and the crank arm 21 may be directly screwed with the ratchet member B12 through the internal screw hole of the ratchet member B12 and/or the supporting member 13.

In some embodiments, the engagement part of the inner cylinder of the crank arm 21 and the outer cylinder of the ratchet member B12 is involute spline engagement.

In some embodiments, the ratchet teeth engaged with the ratchet member B12 and the ratchet member B11 may be of a groove type, or a circular arc type.

In some embodiments, the support member 13, the ratchet member B12 and the connecting lever 21 may be an integrated structure, and when the support member 13, the ratchet member B12 and the connecting lever 21 are integrated, the support bridge 8 is provided with a notch at the top thereof, and the extending portion 211 of the connecting lever 21 is placed in the recess 24 of the hydraulic drive cylinder 22 and the hydraulic piston 23 through the notch.

Specifically, the eccentric resetting assembly 9 is further included, the eccentric resetting assembly 9 includes a resetting 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 through the supporting bridge cylinder 8, two ends of the connecting rod 92 are respectively and fixedly connected with the resetting wrench 91 and the eccentric wheel 93, the eccentric wheel 93 is located at the bottom of the supporting piece 13, and the difference between the long axis and the short axis of the eccentric wheel 93 is greater than the ratchet height of the ratchet piece 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.

In this embodiment, when the ratchet member a11 and the ratchet member B12 are in the engaged state, the short axis of the eccentric wheel 93 and the bottom of the supporting member 13 are close to or in contact with each other, and when the engaged state of the ratchet member B12 and the ratchet member a11 needs to be released, the long axis of the eccentric wheel 93 is pressed against the bottom of the supporting member 13A, the difference between the lengths of the long axis and the short axis of the eccentric wheel 93 is the height at which the supporting member 13 rises, and since the supporting member 13 and the ratchet member B12 are fixedly connected, the difference between the lengths of the long axis and the short axis of the eccentric wheel 93 is the height at which the ratchet member B12 rises, and therefore, when the difference between the lengths of the long axis and the short axis of the eccentric wheel 93 is greater than the ratchet height of the ratchet member B12, the ratchet member a11 and the ratchet member B12 can be disengaged from each other by rotating the eccentric wheel 93, so that the engaged state of the ratchet member a11 and the ratchet member B12 is released.

Therefore, by providing the eccentric reset assembly 9, the connecting rod 92 is driven to rotate by twisting the reset wrench 91, so that the eccentric wheel 93 can rotate, when the long shaft end of the eccentric wheel 93 presses the supporting member 13 upward, the engagement state between the ratchet member a11 and the ratchet member B12 can be released, and when the engagement state between the ratchet member a11 and the ratchet member B12 is released, the ratchet member a11 can be pulled by the pulling rod, so that the nut 100 can be rotated.

In this embodiment, a plurality of through holes 111 for pulling out the ring are uniformly formed in the peripheral wall of the ratchet member a11, a strip hole 81 is formed in the peripheral wall of the support bridge tube 8, the strip hole 81 is horizontally disposed, and the horizontal height of the strip hole 81 is the same as the horizontal height of the through hole 111 in the ratchet member a11, an included angle a formed by two ends of the strip hole 81 to the axis of the ratchet member a11 is greater than an included angle B formed by two adjacent through holes 111 of the ratchet member a11 to the axis thereof, so that after the ratchet member a11 is separated from the ratchet member B12, the pulling rod penetrates through the strip hole 81 of the support bridge tube 8 and is inserted into the through hole 111 of the ratchet member a11, and 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.

In this embodiment, the two eccentric reset assemblies 9 are symmetrically disposed on the supporting bridge 8, and the two eccentric reset assemblies 9 can prevent the eccentric wheel 93 from being stressed unevenly when pressing against the supporting member 13.

The application flow of this embodiment is as follows:

when the present embodiment is used, the supporting bridge cylinder 8 is pressed against the head of the screw rod 200, the ratchet member a11 is sleeved on the nut 100, 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 is screwed and fixed, then hydraulic oil is introduced into the stretching cylinder cavity, so that the piston 53 is pushed upwards, and the pull core 52 is pushed upwards by the piston 53, and because the pull core 52 is fixed to the screw rod 200, the screw rod 200 is stretched under the elastic deformation effect thereof, the locking force between the nut 100 and the screw rod 200 is reduced, and further the torque for driving the nut 100 to rotate is reduced.

After the screw rod 200 is elongated, hydraulic oil is respectively introduced into the two hydraulic cavities at the two ends of the hydraulic piston 23, and then the hydraulic oil in the two hydraulic cavities pushes the hydraulic piston 23 to repeatedly move in the hydraulic driving cylinder 22, so that the left side wall and the right side wall of the notch 24 of the hydraulic piston 23 continuously push the extending portion 211 of the crank arm 21 to repeatedly swing along the circumferential direction of the ratchet member B12, and in the process of repeatedly swinging the ratchet member B12, the ratchet member a11 engaged with the ratchet member B12 continuously rotates in a certain direction, because the rotating direction of the ratchet member a11 is the same as the screwing direction of the nut 100 and the ratchet member a11 and the nut 100 synchronously rotate, the ratchet member can drive the nut 100 to rotate until the nut 100 is screwed.

The second embodiment:

as shown in fig. 1 to 9, the present embodiment provides a hydraulic system, which is applied to an intelligent hydraulic tensioner described above, and includes a hydraulic driving passage communicated with an output end of a hydraulic pump; the hydraulic drive path includes a hydraulic drive branch a71 and a hydraulic drive branch B72 that communicate with the two ends of the hydraulic drive assembly, respectively.

The hydraulic pump in this embodiment is an oil pump, one end of each of the hydraulic drive branch a71 and the hydraulic drive branch B72 in this embodiment is communicated with an output end of the oil pump, the other end of each of the hydraulic drive branch a71 and the hydraulic drive branch B72 is communicated with the hydraulic drive cylinder 22 in the hydraulic drive assembly, the hydraulic drive branch a71 and the hydraulic drive branch B72 are respectively communicated with hydraulic chambers at two ends of the hydraulic drive cylinder 22, two hydraulic chambers of the hydraulic drive cylinder 22 respectively receive liquid pumped by the oil pump through the hydraulic drive branch a71 and the hydraulic drive branch B72, and meanwhile, electromagnetic valves are disposed on the hydraulic drive branch a71 and the hydraulic drive branch B72 and used for switching the hydraulic drive branch a71 and the hydraulic drive branch B72. In this embodiment, the flowing liquid in the hydraulic driving branch a71 and the hydraulic driving branch B72 is hydraulic oil, and the oil pump and the hydraulic oil in this embodiment are common knowledge in the art, and are not described herein again.

Specifically, the hydraulic stretching device further comprises a hydraulic stretching passage communicated with the output end of the hydraulic pump, and the hydraulic stretching passage is divided into a hydraulic stretching branch communicated with the hydraulic stretching cylinder 5 and a hydraulic counting branch communicated with the counter 62 through a flow divider 61.

The general idea of the embodiment is as follows: the hydraulic piston 23 and the hydraulic stretching cylinder 5 in the hydraulic driving assembly are communicated with the same oil pump through a hydraulic stretching passage and a hydraulic driving passage, the cooperative driving of the hydraulic piston 23 and the hydraulic stretching cylinder 5 is realized simultaneously through the same oil pump,

in this embodiment, as shown in fig. 2, a quick connector 73 is disposed on the flow divider 61, one end of the hydraulic stretching passage is communicated with an output end of the oil pump, and the other end of the hydraulic stretching passage is communicated with the flow divider 61 through the quick connector 73, the hydraulic stretching passage is divided into a hydraulic stretching branch communicated with the hydraulic stretching cylinder 5 and a hydraulic counting branch communicated with the counter 62 through the flow divider 61, hydraulic oil of the hydraulic stretching branch is used for driving the hydraulic stretching cylinder 5, and hydraulic oil of the hydraulic counting branch is used for recording stretching times of the hydraulic stretching cylinder 5.

The principle that the counter 62 records the stretching times of the hydraulic stretching cylinder 5 is as follows: when the hydraulic pressure in the hydraulic stretching branch reaches a set value, the hydraulic stretching cylinder 5 stretches, the screw 200 is stretched, and the hydraulic stretching branch is communicated with the hydraulic counting branch, so that the hydraulic pressure in the counter 62 reaches the set value at the same time, the valve in the counter 62 is jacked up and recorded once, and when the hydraulic pressure in the hydraulic stretching branch and the hydraulic counting branch is reduced, the valve in the counter 62 resets and does not record, so that the number of times that the screw 200 is stretched can be automatically recorded by arranging the counter 62, and the number of times that the nut 100 is locked can be indirectly recorded.

In this embodiment, the flow divider 61 is provided with a quick connector 73, and the hydraulic driving passage is communicated with the flow divider 61 through the quick connector 73, and the flow divider 61, the quick connector 73 and the counter 62 in this embodiment are all common knowledge and are not described herein.

It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention, and such changes and modifications are to be considered within the scope of the invention.

Claims (10)

1. An intelligent hydraulic stretcher is used for being sleeved on a supporting bridge cylinder (8) outside a nut to be rotated and is characterized by comprising a ratchet component arranged in the supporting bridge cylinder (8), wherein the ratchet component comprises a ratchet component A (11) which is sleeved on the nut (100) to be rotated and synchronously rotates with the nut to be rotated and a ratchet component B (12) which is used for driving the ratchet component A (11) to rotate along the same direction, and annular ratchets which are mutually matched are arranged at the top of the ratchet component A (11) and the bottom of the ratchet component B (12);

comprises a driving assembly which comprises a hydraulic driving assembly for driving the ratchet member B (12) to rotate repeatedly along the circumferential direction thereof.

2. An intelligent hydraulic tensioner according to claim 1, characterized in that said driving assembly comprises a crank arm (21) fixed to said ratchet member B (12) and rotating synchronously therewith;

the hydraulic drive subassembly is including being fixed in hydraulic drive cylinder (22) on supporting bridge section of thick bamboo (8), and make ratchet piece B (12) along its circumference hydraulic piston (23) of rotation repeatedly through turning arm (21), hydraulic piston (23) are located in hydraulic drive cylinder (22) and are connected rather than the activity sealing, all be equipped with the hydraulic pressure chamber with hydraulic pump output end intercommunication between hydraulic drive cylinder (22) both ends and hydraulic piston (23) both ends, turning arm (21) have run through supporting bridge section of thick bamboo (8) and stretch into extension (211) in hydraulic piston (23), be equipped with on supporting bridge section of thick bamboo (8) and be used for extension (211) along supporting bridge section of thick bamboo (8) circumference wobbling arc through-hole.

3. The intelligent hydraulic tensioner as claimed in claim 2, wherein the crank arm (21) comprises a fixing portion (212) sleeved on the ratchet member B (12) and rotating synchronously therewith, the fixing portion (212) is fixedly connected with the extension portion (211), the hydraulic driving cylinder (22) and the hydraulic piston (23) are provided with a notch (24) for placing the extension portion (211), and the notch (24) of the hydraulic driving cylinder (22) is communicated with the arc-shaped through hole.

4. An intelligent hydraulic tensioner as claimed in claim 2, characterized in that the end of the hydraulic drive cylinder (22) is provided with a detachable end cap seal (221).

5. An intelligent hydraulic tensioner as claimed in claim 2, wherein the hydraulic drive cylinder (22) and the hydraulic piston (23) are of a linear structure, and the intelligent hydraulic tensioner further comprises a guide post (222) which penetrates through the bottom of the hydraulic drive cylinder (22) and is slidably connected with the bottom of the hydraulic piston (23).

6. An intelligent hydraulic tensioner according to claim 2, further comprising a guide end cap (4) inserted into the support bridge cylinder (8) and fixedly connected to the top of the support bridge cylinder, wherein the bottom of the guide end cap (4) is inserted into the ratchet member B (12) and movably connected to the ratchet member B, and an elastic pressing member (3) is further disposed between the guide end cap (4) and the ratchet member B (12).

7. An intelligent hydraulic tensioner as claimed in claim 6, further comprising a support member (13) disposed on top of the ratchet member B (12) and fixedly connected thereto, wherein the crank arm (21) is disposed on the ratchet member B (12) at the bottom of the support member (13).

8. An intelligent hydraulic tensioner according to claim 7, further comprising an eccentric reset assembly (9), wherein the eccentric reset assembly (9) comprises 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 through the supporting bridge cylinder (8), two ends of the connecting rod (92) are respectively and fixedly connected with the reset wrench (91) and the eccentric wheel (93), the eccentric wheel (93) is located at the bottom of the supporting member (13), and the difference between the long axis and the short axis of the eccentric wheel (93) is greater than the height of the ratchet-toothed member B (12).

9. A hydraulic system applied to the intelligent hydraulic stretcher according to any one of claims 1-8, characterized by comprising a hydraulic driving passage communicated with the output end of the hydraulic pump; the hydraulic drive path includes a hydraulic drive branch a (71) and a hydraulic drive branch B (72) that communicate with both ends of the hydraulic drive assembly, respectively.

10. A hydraulic system according to claim 9, characterized by further comprising a hydraulic stretch passage communicating with the hydraulic pump output, the hydraulic stretch passage being split by a splitter (61) into a hydraulic stretch branch communicating with the hydraulic stretch cylinder (5) and a hydraulic count branch communicating with the counter (62).

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