CN115383452A - An intelligent hydraulic tensioner and its hydraulic system - Google Patents

Abstract

The invention discloses an intelligent hydraulic tensioner and its hydraulic system, which relate to the technical field of mechanical fastening, which can at least partly solve the problem of manual tightening of nuts in the prior art, resulting in failure to meet the fastening requirements and precision after the nuts are tightened. requirements and the inefficiencies associated with manual nut turning. An intelligent hydraulic tensioner according to an embodiment of the present invention includes a support bridge tube for being sleeved on the outside of the nut to be rotated, and a ratchet assembly disposed in the support bridge tube, and the ratchet assembly includes a And the ratchet part A which rotates synchronously with it, and the ratchet part B which is used to drive the ratchet part A to rotate in the same direction, the top of the ratchet part A and the bottom of the ratchet part B are provided with ring-shaped ratchets which are adapted to each other ; Including a drive assembly, the drive assembly includes a hydraulic drive assembly for driving the ratchet member B to rotate repeatedly along its circumference.

Description

An intelligent hydraulic stretcher and its hydraulic system

technical field

The invention relates to the technical field of mechanical fastening, in particular to an intelligent hydraulic tensioner and its hydraulic system.

Background technique

At present, the connection and fastening between mechanical devices and a variety of equipment are carried out through screw nuts. And the common method that nut is fixed on the screw rod mainly contains directly screwing on the screw rod with a wrench manually.

In the mechanical field, another common fastening method is to use a hydraulic tensioner to assist the manual tightening of the nut. When the hydraulic tensioner is used, it needs to be set and rotated to the screw through the pull rod, and then the hydraulic tension is driven by the oil pump. Oil pressure is generated in the oil cylinder of the extender, and the pull rod is pushed by the oil pressure, so that the pull rod generates axial tensile force on the screw rod. At this time, the screw rod will undergo elastic deformation, and then manually insert the pull rod into the pull rod sleeved on the nut. On the ring, and pull the pull ring to tighten the nut.

In the prior art, since the tightening of nuts and bolts is mainly realized by manual operation, and the manual torque is limited, about 100Nm, after the pulling force of the tie rod on the screw is released, the locking force of the nut often fails to meet the tightening requirements and accuracy Requirement; Secondly, when manually pulling the puller, it is necessary to repeatedly insert the puller rod into the hole of the puller and repeatedly pull the puller, resulting in inefficient screwing of the nut.

In view of this, this application is proposed.

Contents of the invention

The purpose of the present invention is to provide an intelligent hydraulic tensioner and its hydraulic system, which is used to solve the problem of manually tightening the nuts in the prior art, resulting in failure to meet the tightening requirements, accuracy requirements and manual nut screwing. problem of inefficiency.

In order to solve the problems of the technologies described above, the present invention adopts the following solutions:

One aspect of the present invention provides an intelligent hydraulic tensioner, which is used to fit the support bridge tube outside the nut to be rotated, including a ratchet assembly arranged in the support bridge tube, and the ratchet component includes a And the ratchet part A which rotates synchronously with it, and the ratchet part B which is used to drive the ratchet part A to rotate in the same direction, the top of the ratchet part A and the bottom of the ratchet part B are provided with annular ratchets which are adapted to each other ;

It includes a drive assembly, and the drive assembly includes a hydraulic drive assembly for driving the ratchet part B to rotate repeatedly along its circumferential direction.

Optionally, the drive assembly includes a crank arm that is fixed on the ratchet member B and rotates synchronously therewith;

The hydraulic drive assembly includes a hydraulic drive cylinder fixed on the supporting bridge tube, and a hydraulic piston that repeatedly rotates the ratchet member B along its circumference through the crank arm. The hydraulic piston is arranged in the hydraulic drive cylinder and is connected with its movable seal. Between both ends of the hydraulic drive cylinder and the two ends of the hydraulic piston, there is a hydraulic chamber connected with the output end of the hydraulic pump. The crank arm has an extension part that runs through the support bridge tube and extends into the hydraulic piston. The arc-shaped through hole that swings along the circumferential direction of the supporting bridge tube.

Optionally, the crank arm includes a fixed part sleeved on the ratchet part B and rotates synchronously with it, the fixed part is fixedly connected with the extension part, and the middle part of the hydraulic drive cylinder and the hydraulic piston are both A notch for placing the extension is provided, and the notch of the hydraulic drive cylinder communicates with the arc-shaped through hole.

Optionally, the end of the hydraulic drive cylinder is provided with a detachable sealing end cover.

Optionally, both the hydraulic drive cylinder and the hydraulic piston have a linear structure, and further include a guide column that runs through the bottom of the hydraulic drive cylinder and is slidably connected with the bottom of the hydraulic piston.

Optionally, it also includes a guide end cover inserted in the support bridge tube and on the top thereof, the bottom of the guide end cover is inserted in the ratchet part B and is movably connected with it, and the connection between the guide end cover and the ratchet part B There is also an elastic resisting piece between them.

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

Optionally, an eccentric reset assembly is also included. The eccentric reset assembly includes a reset wrench located outside the support bridge barrel, an eccentric wheel located inside the support bridge barrel, and a connecting rod passing through the support bridge barrel. Both ends of the connecting rod are respectively connected to the reset wrench and the eccentric The wheels are fixedly connected, the eccentric wheel is located at the bottom of the support member, and the difference between the long and short axes of the eccentric wheel is greater than the ratchet height of the ratchet member B.

Another aspect of the present invention provides a hydraulic system, which is applied to any one of the above-mentioned intelligent hydraulic tensioners, including a hydraulic drive passage communicated with the output end of the hydraulic pump; The hydraulic drive branch A and the hydraulic drive branch B connected at both ends of the assembly.

Optionally, it also includes 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 communicating with the hydraulic stretching cylinder and a hydraulic counting branch communicating with the counter through a flow divider.

Beneficial effects of the present invention:

An intelligent hydraulic tensioner of the present invention is used for a support bridge tube set outside the nut to be rotated, and includes a ratchet assembly arranged in the support bridge tube. The rotating ratchet part A, and the ratchet part B used to drive the ratchet part A to rotate in the same direction, the top of the ratchet part A and the bottom of the ratchet part B are provided with mutually matching annular ratchets; Assemblies, the drive assembly includes a hydraulic drive assembly for driving the ratchet member B to rotate repeatedly along its circumference.

Its effects are: through the ratchet piece A and the ratchet piece B that cooperate with each other, and a hydraulic drive assembly for driving the ratchet piece B to rotate repeatedly along its circumference, the ratchet piece A can be rotated repeatedly in the ratchet piece B. During the rotation process, the nut is continuously rotated in the same direction, so that the nut located in the ratchet member A is gradually locked during the rotation process of the ratchet member A, and automatic locking of the nut is realized.

Description of drawings

Fig. 1 is the schematic diagram of the explosion structure of Embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of a three-dimensional structure of Embodiment 1 of the present invention;

Fig. 3 is a front view structural schematic diagram of Embodiment 1 of the present invention;

Fig. 4 is the schematic cross-sectional structure diagram of A-A in Fig. 3;

Fig. 5 is a left view structural schematic diagram of Embodiment 1 of the present invention;

Fig. 6 is a schematic cross-sectional structure diagram of C-C in Fig. 5;

FIG. 7 is a schematic top view of the ratchet member A in Embodiment 1 of the present invention;

Fig. 8 is a schematic top view of the ratchet assembly in Embodiment 1 of the present invention;

FIG. 9 is a schematic diagram of a liquid channel in Embodiment 2 of the present invention.

Explanation of reference signs:

11-Ratchet part A, 111-Through hole, 12-Ratchet part B, 13-Supporting part, 21-Crank arm, 211-Extended part, 212-Fixed part, 22-Hydraulic drive cylinder, 221-End cover, 222-guide column, 23-hydraulic piston, 24-notch, 3-elastic pressure piece, 4-guiding end cover, 5-hydraulic stretching cylinder, 51-stretching cylinder, 52-pull core, 53-piston , 61-Splitter, 62-Counter, 71-Hydraulic drive branch A, 72-Hydraulic drive branch B, 73-Quick connector, 8-Support bridge tube, 81-Strip hole, 9-Eccentric reset assembly, 91-resetting wrench, 92-connecting rod, 93-eccentric wheel, 100-nut, 200-screw rod.

Detailed ways

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

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", "Back", "Top", "Bottom" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the attached drawings, or when the inventive product is used Orientation or positional relationship that is conventionally placed is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a reference to the present invention. Invention Limitations.

In the description of the present invention, it also needs to be explained that, unless otherwise clearly specified and limited, the terms "setting", "opening", "installing", "connecting" and "connecting" 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 an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

The present invention is described in detail below in conjunction with embodiment by referring to accompanying drawing:

Embodiment one:

As shown in Figures 1 to 8, an intelligent hydraulic tensioner is used to fit the support bridge tube 8 outside the nut 100 to be rotated, and includes a ratchet assembly arranged in the support bridge tube 8, and the ratchet assembly includes a sleeve The ratchet part A11 is arranged on the nut 100 to be rotated and rotates synchronously with it, and the ratchet part B12 is used to drive the ratchet part A11 to rotate in the same direction. The top of the ratchet part A11 and the bottom of the ratchet part B12 are provided with The annular ratchets adapted to each other include a driving assembly, and the driving assembly includes a hydraulic driving assembly for driving the ratchet part B12 to repeatedly rotate along its circumference.

As shown in Fig. 2 and Fig. 8, the annular ratchet includes an annular ratchet A on the top of the ratchet part A11 and an annular ratchet B on the bottom of the ratchet part B12, and the annular ratchet A and the annular ratchet B are compatible with each other. match. By setting the ratchet part A11 on the nut 100 to be rotated and rotating synchronously with the nut 100, and simultaneously driving the ratchet part B12 which cooperates with the ratchet part A11 to repeatedly rotate along its circumference, the ratchet part A11 can be The ratchet part B12 continuously rotates in the same direction during the repeated rotation along its circumference, so that the ratchet part A11 can drive the nut 100 to continuously rotate in the same direction, so that the nut 100 is tightened or loosened; when the ratchet When the rotation direction of the ratchet part A11 is the same as that of the nut 100, the ratchet part A11 and the intelligent hydraulic tensioner can automatically tighten the nut 100; otherwise, the rotation direction of the ratchet part A11 is the same as the nut 100. When the rotation direction is opposite, the ratchet part A11 and the intelligent hydraulic tensioner can automatically loosen the nut 100, and the rotation direction of the ratchet part A11 is related to its ratchet orientation. Therefore, the ratchet assembly and its The intelligent hydraulic tensioner can automatically tighten or loosen the nut 100 .

In this embodiment, the structure that drives the ratchet part B12 to rotate repeatedly in the drive assembly is a hydraulic drive assembly. The hydraulic drive assembly can provide sufficient torque for the tightening of the nut 100, which is far greater than about 100 Nm that can be achieved by manual tightening. Therefore, the setting The overall concept of the ratchet assembly and the drive assembly can make the nut 100 realize the automation of tightening or loosening, especially the automatic tightening of the nut 100, which can solve the problem that the nut 100 cannot meet the tightening requirements after being locked due to manual tightening , the problem of precision requirements, and the problem of time-consuming and labor-intensive manual tightening.

In this embodiment, the ratchet member A11 is a ratchet pull-out flange sleeved on the nut 100, the ring-shaped ratchet A of the ratchet pull-out flange is arranged on the top thereof, and the internal shape of the ratchet pull-out flange is the same as The shape of the nut to be rotated 100 is adapted, therefore, after the ratchet ring flange is sleeved on the nut to be rotated 100, the ratchet ring flange can drive the nut to be rotated 100 to rotate synchronously, and the ratchet part B12 is a ratchet For the clutch flange, the ring ratchet B of the ratchet clutch flange is set at the bottom, and the ring ratchet B at the bottom of the ratchet clutch flange matches the ring ratchet A at the top of the ratchet ring flange. This implementation In the example, the direction of the ring ratchet of the ratchet ring flange is opposite to the direction of rotation of the nut 100 when tightened. The ratchet assembly and its intelligent hydraulic tensioner in this embodiment are used for the automatic tightening of the nut 100 .

Specifically, the drive assembly includes a crank arm 21 that is fixed on the ratchet member B12 and rotates synchronously with it; The hydraulic piston 23 that makes the ratchet part B12 rotate repeatedly along its circumferential direction, the hydraulic piston 23 is arranged in the hydraulic drive cylinder 22 and is connected with its movable seal, the two ends of the hydraulic drive cylinder 22 and the two ends of the hydraulic piston 23 are provided with The hydraulic chamber connected to the output end of the hydraulic pump. The crank arm 21 has an extension 211 that penetrates the support bridge tube 8 radially along the support bridge tube 8 and extends into the hydraulic piston 23. In this embodiment, the support bridge tube 8 is provided with a The crank arm 21 swings along the arc-shaped through hole of the bridge tube 8 in the circumferential direction.

In this embodiment, the hydraulic pump communicating with the hydraulic chambers at both ends of the hydraulic drive cylinder 22 is an oil pressure pump, and the hydraulic chambers at both ends of the hydraulic drive cylinder 22 communicate with the output end of the oil pressure pump, so that the hydraulic chamber can receive the output end of the oil pressure pump. The pumped hydraulic oil makes the hydraulic piston 23 move repeatedly in the hydraulic drive cylinder 22 under the pressure of the hydraulic pressure difference between the two ends of the hydraulic oil. Since the extension 211 of the crank arm 21 extends into the hydraulic piston 23, The extension 211 of the crank arm 21 will be repeatedly pushed along with the repeated movement of the hydraulic piston 23, and at the same time, since the crank arm 21 in the drive assembly rotates synchronously with the ratchet member B12, the hydraulic piston 23 can be pushed by the crank arm 21. The ratchet part B12 rotates repeatedly along its circumference, and the repeated rotation of the ratchet part B12 can drive the ratchet part A11 which is matched with it to continuously rotate in the same direction, so that the nut 100 which rotates synchronously with the ratchet part A11 is tightened .

Specifically, the crank arm 21 includes a fixed part 212 sleeved on the ratchet part B12 and rotates synchronously with it, the fixed part 212 is fixedly connected with the extension part 211, the hydraulic drive cylinder 22 and the hydraulic pressure The middle part of the piston 23 is provided with a notch 24 for placing the extension part 211 , and the notch of the hydraulic drive cylinder 22 communicates with the arc-shaped through hole.

In this embodiment, a supporting bridge tube 8 is also included, and a mounting hole is provided on the supporting bridge tube 8 , and the extension 211 of the crank arm 21 passes through the mounting hole and is located in the notch 24 .

As shown in Figure 2, some teeth are arranged on the peripheral wall of the ratchet part B12 in the present embodiment, and the fixing portion 212 of the crank arm 21 is sleeve-shaped, and the inside of the sleeve is provided with some teeth, and the crank arm The teeth on the inner peripheral wall of the fixed part 212 of 21 mesh with the teeth on the outer peripheral wall of the ratchet part B12. Since the ratchet part B12 and the fixed part 212 of the crank arm 21 are meshed with each other, the ratchet part and the crank arm 21 can rotate synchronously. And at the same time, it is convenient for installation and disassembly, and it is convenient for maintenance and replacement of subsequent parts. In this embodiment, as shown in FIG. 2 , washers are provided above and below the fixing portion 212 of the crank arm 21 .

As shown in Figures 1 and 2, a notch 24 is provided in the middle of the hydraulic drive cylinder 22 and the hydraulic piston 23. The notch 24 includes a sleeve notch and a piston notch, and the extension 211 of the crank arm 21 runs through the support bridge in turn. cylinder 8, sleeve notch and extend into the piston notch, therefore, when the hydraulic piston 23 moves repeatedly in the hydraulic drive cylinder 22, the left side wall and the right side wall of the piston notch 24 constantly push the crank arm 21 The extension part 211 of the ratchet member B12 swings repeatedly along the circumference of the ratchet member B12.

In some embodiments, an inner screw hole may be provided on the peripheral wall of the ratchet member B12, and the crank arm 21 may be directly screwed to the ratchet member B12 through the inner screw hole of the ratchet member B12.

Specifically, the end of the hydraulic drive cylinder 22 is provided with a detachable sealing end cover 221 . The detachable connection can be threaded connection or card connection; the sealed end cover 221 and the hydraulic drive cylinder 22 are detachably sealed to avoid oil leakage in the hydraulic cavity between the hydraulic drive cylinder 22 and the hydraulic piston 23 . In this embodiment, the inner peripheral wall of the end of the hydraulic drive cylinder 22 is provided with an internal thread, and the end cover 221 is provided with an external thread suitable for the internal thread, and the detachable connection between the end cover 221 and the hydraulic drive cylinder 22 is as follows: Threaded connection, as a conventional detachable method, not only facilitates processing, but also can withstand a large enough axial hydraulic force, so that the hydraulic piston 23 can exert enough thrust on the crank arm 21 to push the ratchet part B12 to rotate.

Preferably, both the hydraulic drive cylinder 22 and the hydraulic piston 23 are linear structures, and also include a guide post 222 penetrating through the bottom of the hydraulic drive cylinder 22 and slidingly connected with the bottom of the hydraulic piston 23 . In this embodiment, the hydraulic drive cylinder 22 and the hydraulic piston 23 both have a linear structure, and the hydraulic piston 23 swings repeatedly in the hydraulic drive cylinder 22 along its axis. By setting the guide column 222 at the bottom of the hydraulic drive cylinder 22, the hydraulic pressure can be avoided. When the piston 23 swings repeatedly, the hydraulic piston 23 rotates along its circumference, which affects the transmission efficiency.

In some embodiments, the hydraulic drive cylinder 22 and the hydraulic piston 23 can also be arc-shaped structures, that is, the hydraulic drive cylinder 22 and the hydraulic piston 23 are arc-shaped, and the hydraulic piston 23 repeats with the center of the ratchet B12 as the center of the circle. swing.

Specifically, it also includes a guide end cover 4 inserted in the support bridge tube 8 and fixedly connected to its top, the bottom of the guide end cover 4 is inserted in the ratchet part B12 and is movably connected with it, and the guide end cover 4 is connected to the ratchet part B12. Elastic pressing parts 3 are also provided between the ratchet parts B12.

In this embodiment, the guide end cover 4 is fixed on the top of the supporting bridge tube 8 through the thread on the top, and the guide end cover 4 and the supporting bridge tube 8 are coaxially arranged, and the ratchet part B12 is sleeved on the guide end cover 4 The bottom of the bottom and move along its axial direction, the elastic resisting part 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 part B12 and the top of the guide end cover 4.

By setting the guide end cover 4 at the bottom of the hydraulic stretching cylinder 5, and setting the elastic resisting member 3 between the guide end cover 4 and the ratchet part B12, the ratchet part B12 can be rotated repeatedly. B12 is pressed down and forms a real-time, tight meshing relationship with the ratchet part A11, avoiding the problem that the meshing relationship with the ratchet part A11 is not tight enough due to the gravity of the ratchet part B12.

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 promote the rotation of the ratchet part A11, and the ratchet part B12 is tightened along the nut 100 After the direction is reversed, the elastic pressing piece can press the ratchet part B12 downward, so that the ratchet at the bottom of the ratchet part B12 and the ratchet at the top of the ratchet part A11 form a tight meshing relationship, thereby avoiding the ratchet The engagement between the tooth part B12 and the ratchet part A11 is not tight enough.

In this embodiment, it also includes a hydraulic stretching cylinder 5 arranged at the top of the supporting bridge barrel 8, the hydraulic stretching cylinder 5 includes a pulling core 52 sleeved on the screw rod 200 and threaded therewith, and also includes a stretching cylinder body 51 and Piston 53, piston 53 is movable and sealed with stretching cylinder 51, and the top of pulling core 52 is provided with a protrusion. There is a stretching cylinder cavity for receiving hydraulic oil in between. By passing hydraulic oil into the stretching cylinder cavity, the piston 53 can be pushed upwards, and then the pulling core 52 can be pushed to elongate the screw rod 200, so that the screw rod 200 becomes elastic. Deformation facilitates the tightening of the nut 100 .

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

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 part B12 is a detachable fixed connection. As shown in FIG. 2, the detachable fixed connection is a threaded connection .

By arranging the support member 13, the structural strength of the ratchet part B12 can be improved, and the installation and disassembly of the crank arm 21 can be facilitated, so as to avoid the insufficient structural strength of the ratchet part B12 when the hydraulic stretching cylinder extends along the circumferential direction of the screw rod 200. damage or shortened service life.

In some embodiments, the support piece 13 and the ratchet piece B12 can be an integrated structure, and internal screw holes can also be provided on the peripheral wall of the support piece 13 or/and the ratchet piece B12, and the crank arm 21 can directly pass through the ratchet Part B12 or/and the inner screw hole of the support part 13 is threadedly connected with the ratchet part B12.

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

In some real-time examples, the ratchet teeth engaged with the ratchet member B12 and the ratchet member B11 can be groove-shaped or arc-shaped on the end face.

In some embodiments, the support member 13, the ratchet member B12 and the crank arm 21 can be an integrated structure. There is a notch at the top thereof, through which the extension 211 of the crank arm 21 is placed in the notch 24 of the hydraulic drive cylinder 22 and the hydraulic piston 23 .

Specifically, it also includes an eccentric reset assembly 9. The eccentric reset assembly 9 includes a reset wrench 91 located outside the support bridge tube 8, an eccentric wheel 93 located inside the support bridge tube 8, and a connecting rod 92 passing through the support bridge tube 8. The connecting rod 92 The two ends are respectively fixedly connected with 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 long and short axis of the eccentric wheel 93 is greater than the ratchet height of the ratchet part B12. In this embodiment, the connecting rod 92 is integrally connected with the reset wrench 91, and the connecting rod 92 and the reset wrench 91 are L-shaped.

In this embodiment, when the ratchet part A11 and the ratchet part B12 are in the meshed state, the short axis of the eccentric wheel 93 and the bottom of the support part 13 are close to or contact each other. When it is necessary to release the ratchet part B12 and the ratchet part A11 During the meshing state, the major axis of the eccentric wheel 93 is pressed against the bottom of the support member 13A, and the difference between the length of the major axis and the minor axis of the eccentric wheel 93 is the rising height of the support member 13. Since the support member 13 and the ratchet part B12 Fixed connection, therefore, the length difference between the major axis and the minor axis of the eccentric wheel 93 is the rising height of the ratchet part B12, so the difference between the major axis and the minor axis of the eccentric wheel 93 is greater than the ratchet teeth of the ratchet part B12 When the height is high, rotating the eccentric wheel 93 can disengage the ratchet part A11 and the ratchet part B12 from each other, so that the meshing state of the ratchet part A11 and the ratchet part B12 is released.

Therefore, by setting 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. The meshing state of the ratchet part A11 and the ratchet part B12 can be released, and when the meshing state of the ratchet part A11 and the ratchet part B12 is released, the ratchet part A11 can be moved by the pulling rod, and then the nut 100 be spun.

In this embodiment, the peripheral wall of the ratchet part A11 is evenly provided with several through holes 111 for pulling out the ring, and the peripheral wall of the supporting bridge tube 8 is provided with a strip-shaped hole 81, which is horizontally arranged, and the strip-shaped The level of the hole 81 is the same as the level of the through hole 111 on the ratchet part A11, and the angle A formed between the two ends of the strip hole 81 and the axis of the ratchet part A11 is greater than that between the two adjacent through holes 111 of the ratchet part A11. The included angle B formed by its axes, therefore, when the ratchet part A11 is separated from the ratchet part B12, the pull rod passes through the bar-shaped hole 81 of the support bridge tube 8 and is inserted into the through hole 111 of the ratchet part A11, which can The ratchet part A11 drives the nut 100 to rotate in the direction of unscrewing the nut 100 until the nut 100 is unscrewed.

In this embodiment, two eccentric reset assemblies 9 are arranged symmetrically on the support bridge tube 8 , and the arrangement of the two eccentric reset assemblies 9 can avoid uneven force when the eccentric wheel 93 presses against the support member 13 .

The usage process of this embodiment is as follows:

When using this embodiment, the support bridge tube 8 is pressed against the head of the screw rod 200, the ratchet part A11 is sleeved on the nut 100, and then the pulling core 52 is sleeved on the other side of the screw rod 200 away from the head of the screw rod 200. One end is tightened and fixed, and then hydraulic oil is passed into the stretching cylinder cavity, so that the piston 53 is pushed upwards, and the piston 53 pushes up the pulling core 52. Since the pulling core 52 is fixed to the screw rod 200, the , the screw rod 200 is elongated under the action of its elastic deformation, the locking force between the nut 100 and the screw rod 200 is reduced, and the torque driving the rotation of the nut 100 is reduced.

After the screw rod 200 is elongated, hydraulic oil is fed into the two hydraulic chambers at both ends of the hydraulic piston 23 respectively, and then the hydraulic oil in the two hydraulic chambers pushes the hydraulic piston 23 to move repeatedly in the hydraulic drive cylinder 22, thereby making The left side wall and the right side wall of the notch 24 of the hydraulic piston 23 constantly push the extension part 211 of the crank arm 21 to swing repeatedly along the circumference of the ratchet part B12. The ratchet part A11 engaged with B12 rotates continuously in a certain direction. Since the rotation direction of the ratchet part A11 in this embodiment is the same as the tightening direction of the nut 100, and the ratchet part A11 and the nut 100 rotate synchronously, therefore, the ratchet The component can drive the nut 100 to rotate until the nut 100 is tightened.

Embodiment two:

As shown in Figures 1 to 9, this embodiment provides a hydraulic system, which is applied to the above-mentioned intelligent hydraulic tensioner, including a hydraulic drive passage connected to the output end of the hydraulic pump; A hydraulic drive branch A71 and a hydraulic drive branch B72 connected to both ends of the hydraulic drive assembly.

The hydraulic pump in this embodiment is an oil pump, and one end of the hydraulic drive branch circuit A71 and the hydraulic drive branch circuit B72 in this embodiment are both communicated with the output end of the oil pump, and the other ends are communicated with the hydraulic drive cylinder 22 in the hydraulic drive assembly , and the hydraulic drive branch A71 and the hydraulic drive branch B72 communicate with the hydraulic chambers at both ends of the hydraulic drive cylinder 22 respectively, and the two hydraulic chambers of the hydraulic drive cylinder 22 receive the oil pump through the hydraulic drive branch A71 and the hydraulic drive branch B72 respectively. pumped liquid, meanwhile, solenoid valves are provided on the hydraulic driving branch A71 and the hydraulic driving branch B72, and the solenoid valves are used to switch the hydraulic driving branch A71 and the hydraulic driving branch B72. In this embodiment, the liquid flowing in the hydraulic drive branch A71 and the hydraulic drive branch B72 is hydraulic oil, and the oil pump and hydraulic oil in this embodiment are common knowledge in the field, and will not be repeated here.

Specifically, it also includes 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 communicating with the hydraulic stretching cylinder 5 and a hydraulic counting branch communicating with the counter 62 through the flow divider 61 .

The overall idea of this embodiment is: the hydraulic piston 23 and the hydraulic stretching cylinder 5 in the hydraulic drive assembly are all communicated with the same oil pump through the hydraulic stretching passage and the hydraulic driving passage, and the hydraulic piston 23 and the hydraulic stretching cylinder 5 are simultaneously realized by the same oil pump. Synergistic drive of cylinder 5,

In this embodiment, as shown in FIG. 2 , the splitter 61 is provided with a quick-plug joint 73 , one end of the hydraulic stretching passage communicates with the output end of the oil pump, and the other end communicates with the splitter 61 through the quick-plug joint 73 , and the hydraulic pull The extension path 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, and the hydraulic oil in the hydraulic stretching branch is used to drive the hydraulic stretching cylinder 5. , the hydraulic oil in the hydraulic counting branch is used to record the stretching times of the hydraulic stretching cylinder 5 , and in some embodiments, the hydraulic counting branch can also be directly communicated with the inner cylinder of the hydraulic stretching cylinder 5 .

The principle of the counter 62 recording the stretching times of the hydraulic stretching cylinder 5 is: when the hydraulic pressure in the hydraulic stretching branch reaches the set value, the hydraulic stretching cylinder 5 is stretched, and the screw 200 is stretched. The branch and the hydraulic counting branch are connected, therefore, 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 records 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 does not record. Therefore, by setting the counter 62, the number of times the screw 200 is elongated can be automatically recorded, thereby indirectly realizing the recording of the number of nuts 100 locked.

In this embodiment, the shunt 61 is provided with a push-in joint 73, and the hydraulic drive path communicates with the shunt 61 through the push-in joint 73. The shunt 61, the quick-plug joint 73 and the counter 62 in this embodiment are all common knowledge , which will not be repeated here.

It can be understood that, the above embodiments are only exemplary embodiments adopted for illustrating the principle 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 regarded as the protection scope of the present invention.

Claims (10)

1. An intelligent hydraulic tensioner, which is used to be sleeved on a support bridge barrel (8) outside the nut to be rotated, is characterized in that it includes a ratchet assembly arranged in the support bridge barrel (8), and the ratchet assembly includes a sleeve The ratchet part A (11) which is arranged on the nut to be rotated (100) and rotates synchronously with it, and the ratchet part B (12) which is used to drive the ratchet part A (11) to rotate in the same direction, and the ratchet part A The top of (11) and the bottom of ratchet part B (12) are provided with the annular ratchet that fits mutually; It includes a drive assembly, and the drive assembly includes a hydraulic drive assembly for driving the ratchet part B (12) to repeatedly rotate along its circumferential direction. 2. A kind of intelligent hydraulic stretcher according to claim 1, characterized in that, the drive assembly includes a crank arm (21) fixed on the ratchet member B (12) and rotating synchronously therewith; The hydraulic drive assembly includes a hydraulic drive cylinder (22) fixed on the support bridge tube (8), and a hydraulic piston (23) that makes the ratchet B (12) repeatedly rotate along its circumference through the crank arm (21) , the hydraulic piston (23) is located in the hydraulic drive cylinder (22) and is connected with its movable seal, and a hydraulic pressure pump connected to the output end of the hydraulic pump is provided between the two ends of the hydraulic drive cylinder (22) and the two ends of the hydraulic piston (23). Cavity, the crank arm (21) has an extension (211) that runs through the support bridge tube (8) and extends into the hydraulic piston (23), and the support bridge tube (8) is provided with a (8) Arc-shaped through holes that swing in the circumferential direction. 3. A kind of intelligent hydraulic tensioner according to claim 2, characterized in that, the crank arm (21) includes a fixed part ( 212), the fixed part (212) is fixedly connected with the extension part (211), and the middle part of the hydraulic drive cylinder (22) and the hydraulic piston (23) is provided with a notch for placing the extension part (211) (24), the notch (24) of the hydraulic drive cylinder (22) communicates with the arc-shaped through hole. 4. An intelligent hydraulic tensioner according to claim 2, characterized in that, the end of the hydraulic drive cylinder (22) is provided with a detachable sealing end cap (221). 5. A kind of intelligent hydraulic tensioner according to claim 2, characterized in that, the hydraulic drive cylinder (22) and the hydraulic piston (23) are linear structures, and also include a hydraulic drive cylinder (22) Bottom and the guide column (222) that is slidingly connected with the hydraulic piston (23) bottom. 6. A kind of intelligent hydraulic stretcher according to claim 2, is characterized in that, also comprises the guide end cover (4) that is inserted in the support bridge tube (8) and is fixedly connected with its top, guide end cover ( The bottom of 4) is inserted into the ratchet part B (12) and is flexibly connected with it, and an elastic resisting part (3) is also provided between the guide end cover (4) and the ratchet part B (12). 7. A kind of intelligent hydraulic stretcher according to claim 6, characterized in that, it also comprises a support member (13) arranged on the top of the ratchet member B (12) and fixedly connected thereto, the crank arm (21) Set on the ratchet part B (12) at the bottom of the support (13). 8. An intelligent hydraulic tensioner according to claim 7, characterized in that it also includes an eccentric reset assembly (9), and the eccentric reset assembly (9) includes a reset wrench (91) located on the outside of the support bridge barrel (8) ), the eccentric wheel (93) located inside the supporting bridge tube (8) and the connecting rod (92) passing through the supporting bridge tube (8), the two ends of the connecting rod (92) are respectively connected with the reset wrench (91) and the eccentric wheel (93 ) is fixedly connected, the eccentric wheel (93) is located at the bottom of the support (13), and the difference between the long and short axes of the eccentric wheel (93) is greater than the ratchet height of the ratchet part B (12). 9. A hydraulic system, applied to any one of claims 1-8, characterized in that it includes a hydraulic drive path 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) connected to both ends of the hydraulic drive assembly. 10. A kind of hydraulic system according to claim 9, is characterized in that, also comprises the hydraulic stretching path that is communicated with hydraulic pump output end, and hydraulic stretching path is divided into and hydraulic stretching cylinder ( 5) The connected hydraulic stretching branch and the hydraulic counting branch connected with the counter (62).

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