CN213673853U

CN213673853U - Hydraulic wrench

Info

Publication number: CN213673853U
Application number: CN202022569703.XU
Authority: CN
Inventors: 李建军
Original assignee: Wuhan Zhonghong Precision Machinery Co ltd
Current assignee: Wuhan Zhonghong Precision Machinery Co ltd
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2021-07-13
Anticipated expiration: 2030-11-09

Abstract

The utility model relates to a hydraulic machine technical field, concretely relates to hydraulic wrench, which comprises a housin, install hydraulic drive spare in the casing and the piston rod that is driven by hydraulic drive spare, still include ratchet subassembly, ratchet subassembly includes drive fork, ratchet and pawl, the ratchet is the C type structure of seting up the keeping silent on the global and the central point that keeps silent and extend to the ratchet puts, the arc wall has been seted up on the side of ratchet, the arc center of arc wall and the center coincidence of ratchet, the drive fork is equipped with the counterpoint piece towards one side of ratchet, the counterpoint piece with the arc wall sliding fit, the pawl is installed on the drive fork and with the ratchet meshes mutually, the end that the drive fork kept away from the ratchet pass through the removable pin with the end connection of piston rod; the utility model discloses can follow the side implementation of nut or bolt and press from both sides tightly, be applicable to bolt, nut at the narrow and small operating mode of axial space.

Description

Hydraulic wrench

Technical Field

The utility model relates to a hydraulic pressure machinery technical field, concretely relates to hydraulic spanner.

Background

The hydraulic wrench is a hydraulic tool for bolts, can output and set torque, and belongs to a high-pressure hydraulic tool. The method is widely applied to industries such as petrochemical industry, wind power, hydropower, thermoelectricity, mines, machinery, steel mills, rubber, pipelines and the like.

The existing hydraulic wrench has two structures of a sleeve hydraulic wrench and a hollow hydraulic wrench, wherein the sleeve hydraulic wrench is generally used in occasions where the upper spaces of a bolt and a nut are not limited; the upper space of the bolt and the nut is limited, but a hollow hydraulic wrench can be used in the place where the hydraulic wrench can be placed. If the distance between the bolt and the nut close to the connected part is too small, or the space above the bolt and the nut is narrow, and the hydraulic wrench cannot be put in, the bolt and the nut can only be pre-tightened by a method of knocking a common wrench, so that not only can the pre-tightening force not be accurately controlled, but also the tightening speed is slow, and the working hours are long.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at overcoming the defect among the prior art, provide a hydraulic wrench, can implement from the side of nut or bolt and press from both sides tightly, be applicable to bolt, nut in the narrow and small operating mode of axial space.

The utility model discloses a hydraulic wrench, which comprises a housin, install hydraulic drive spare in the casing and the piston rod that is driven by hydraulic drive spare, still include ratchet subassembly, ratchet subassembly includes drive fork, ratchet and pawl, the ratchet is for seting up the C type structure of keeping silent on global just keep silent and extend to the central point of ratchet and put, the arc wall has been seted up on the side of ratchet, the arc center of arc wall and the central coincidence of ratchet, the drive fork towards one side of ratchet is equipped with the counterpoint piece, the counterpoint piece with arc wall sliding fit, the pawl is installed on the drive fork and with the ratchet meshes mutually, the drive fork is kept away from the tip of ratchet pass through the removable pin with the end connection of piston rod.

Further, the matching piece is an arc-shaped sliding block, and the arc length of the arc-shaped sliding block is 1/3-1/2 of the arc length of the arc-shaped groove.

Furthermore, the matching pieces are a plurality of sliding pin shafts, and the included angle formed by the two outermost sliding pin shafts and the center of the ratchet wheel is 1/3-1/2 of the arc center angle of the arc groove.

Furthermore, the number of the driving forks is two, and the two driving forks are arranged on two sides of the ratchet wheel to clamp the ratchet wheel.

Furthermore, the pawl includes first pawl and second pawl, first pawl and second pawl all have the locking arm that offsets with the ratchet, the locking arm rotate through the pivot connect in on the drive fork, first pawl still includes the application of force arm of a reverse extension towards the locking arm direction, the application of force arm and the locking arm of first pawl constitute lever structure jointly, be equipped with compression spring between the application of force arm of first pawl and the locking arm of second pawl.

Furthermore, the locking arms of the first pawl and the second pawl are provided with unlocking pins, and the driving fork and the shell are provided with arc-shaped holes for the unlocking pins to pass through.

The utility model has the advantages that: the utility model discloses a hydraulic wrench drives the drive fork through hydraulic drive spare drive piston rod, and the pawl on the drive fork orders about ratchet simultaneously, and the ratchet is for seting up the C type structure of keeping silent on global for the ratchet can carry out the interlock to the bolt from the side of bolt, twists the bolt during ratchet, has increased hydraulic wrench's use scene.

Drawings

The invention will be further described with reference to the following figures and examples:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the ratchet assembly of the present invention;

FIG. 3 is a schematic view of a structure of a coordination unit of the present invention;

fig. 4 is another schematic structural diagram of the middle positioning member of the present invention.

Description of reference numerals: the hydraulic locking device comprises a shell 1, a hydraulic driving piece 2, a piston rod 3, a driving fork 4, a ratchet wheel 5, a pawl 6, a jaw 7, an arc-shaped groove 8, a matching piece 9, a movable pin 10, a first pawl 601, a second pawl 602, a locking arm 603, a force applying arm 604, a compression spring 11, an unlocking pin 12 and an arc-shaped hole 13.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-3, the hydraulic wrench in this embodiment comprises a housing 1, a hydraulic driver 2 and a piston rod 3 driven by the hydraulic driver 2 are installed in the housing 1, and a ratchet assembly, the ratchet wheel assembly comprises a driving fork 4, a ratchet wheel 5 and a pawl 6, the ratchet wheel 5 is of a C-shaped structure, the peripheral surface of the ratchet wheel is provided with a jaw 7, the jaw 7 extends to the central position of the ratchet wheel 5, the side edge of the ratchet wheel 5 is provided with an arc-shaped groove 8, the arc center of the arc-shaped groove 8 is superposed with the center of the ratchet wheel 5, one side of the driving fork 4 facing the ratchet wheel 5 is provided with a matching part 9, the matching part 9 is in sliding fit with the arc-shaped groove 8, the pawl 6 is installed on the driving fork 4 and meshed with the ratchet wheel 5, and the end part of the driving fork 4 far away from the ratchet wheel 5 is connected with the end part of the piston rod 3 through a movable pin 10.

In practical implementation, the ratchet 5 engages the bolt from the side of the bolt through the jaw 7, rather than just the conventional hydraulic wrench which is sleeved from the axial direction of the bolt, and optimally, after engagement, the axis of the bolt is coincident with the central axis of the ratchet wheel 5, the bolt can be screwed as long as the ratchet wheel 5 rotates, the hydraulic driving piece 2 is utilized to drive the piston rod 3 to extend out, the end part of the piston rod 3 is connected with the driving fork 4 through the movable pin 10, therefore, when the piston rod 3 extends out, the driving fork 4 is driven to rotate, and the driving fork 4 can only rotate along the arc-shaped groove 8, the arc center of the arc-shaped groove 8 is superposed with the center of the ratchet wheel 5, so that the rotating center of the driving fork 4 is consistent with the center of the ratchet wheel 5, at the moment, the ratchet wheel 5 can play a role of transmitting the force on the driving fork 4 to the ratchet wheel 5, the ratchet wheel 5 can be driven to rotate, and in order to counteract the reaction force, the hydraulic wrench can be fixed or a reaction force arm can be arranged on the shell 1.

In this embodiment, the positioning member 9 is an arc-shaped slider, and the arc length of the arc-shaped slider is 1/3-1/2 of the arc length of the arc-shaped slot 8. In another embodiment, as shown in fig. 4, the positioning member 9 is a plurality of sliding pins distributed along the arc-shaped slot 8, and the two outermost sliding pins form an included angle 1/3-1/2 with the center of the ratchet 5, which is the arc center angle of the arc-shaped slot 8.

In this embodiment, the number of the driving forks 4 is two, and the two driving forks 4 are disposed on two sides of the ratchet wheel 5 to clamp the ratchet wheel 5, so that the ratchet wheel 5 can stably rotate.

In this embodiment, the pawl 6 includes a first pawl 601 and a second pawl 602, the first pawl 601 and the second pawl 602 both have a locking arm 603 that abuts against the ratchet 5, the locking arm 603 is rotatably connected to the driving fork 4 through a rotating shaft, the first pawl 601 further includes a force applying arm 604 that extends in a direction opposite to the direction of the locking arm 603, the force applying arm 604 and the locking arm 603 of the first pawl 601 jointly form a lever structure, a compression spring 11 is disposed between the force applying arm 604 of the first pawl 601 and the locking arm 603 of the second pawl 602, the second pawl 602 can always abut against the ratchet 5 under the action of the compression spring 11, and the first pawl 601 can also always abut against the ratchet 5 under the action of the lever structure.

In this embodiment, the locking arms 603 of the first pawl 601 and the second pawl 602 are both provided with an unlocking pin 12, the driving fork 4 and the housing 1 are both provided with an arc-shaped hole 13 for the unlocking pin 12 to pass through, the ratchet 5 can be temporarily unlocked by pulling the unlocking pin 12, and the ratchet 5 can be rotated manually or by setting other structures.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The utility model provides a hydraulic wrench, includes the casing, install hydraulic drive spare and the piston rod that drives by hydraulic drive spare in the casing, its characterized in that: still include the ratchet subassembly, the ratchet subassembly includes drive fork, ratchet and pawl, the ratchet is for offering the C type structure of keeping silent on global just keep silent and extend to the central point of ratchet and put, the arc wall has been seted up on the side of ratchet, the arc center of arc wall and the center coincidence of ratchet, the drive fork towards one side of ratchet is equipped with the counterpoint piece, the counterpoint piece with arc wall sliding fit, the pawl is installed on the drive fork and with the ratchet meshes mutually, the drive fork is kept away from the tip of ratchet pass through the movable pin with the end connection of piston rod.

2. A hydraulic wrench as claimed in claim 1, wherein: the matching piece is an arc-shaped sliding block, and the arc length of the arc-shaped sliding block is 1/3-1/2 of the arc length of the arc-shaped groove.

3. A hydraulic wrench as claimed in claim 1, wherein: the matching pieces are a plurality of sliding pin shafts, and the included angle formed by the two outermost sliding pin shafts and the center of the ratchet wheel is 1/3-1/2 of the arc center angle of the arc groove.

4. A hydraulic wrench as claimed in claim 1, wherein: the two driving forks are arranged on two sides of the ratchet wheel to clamp the ratchet wheel.

5. A hydraulic wrench as claimed in claim 1, wherein: the pawl comprises a first pawl and a second pawl, the first pawl and the second pawl are provided with locking arms which are abutted to the ratchet wheel, the locking arms are connected to the driving fork through rotating shafts in a rotating mode, the first pawl further comprises a force applying arm which extends towards the locking arm in the reverse direction, the force applying arm of the first pawl and the locking arms jointly form a lever structure, and a compression spring is arranged between the force applying arm of the first pawl and the locking arms of the second pawl.

6. A hydraulic wrench as claimed in claim 5, wherein: the locking arms of the first pawl and the second pawl are provided with unlocking pins, and the driving fork and the shell are provided with arc-shaped holes for the unlocking pins to penetrate through.