CN209705191U - A kind of twin-stage stretcher gear assembly - Google Patents
A kind of twin-stage stretcher gear assembly Download PDFInfo
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- CN209705191U CN209705191U CN201920519462.2U CN201920519462U CN209705191U CN 209705191 U CN209705191 U CN 209705191U CN 201920519462 U CN201920519462 U CN 201920519462U CN 209705191 U CN209705191 U CN 209705191U
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Abstract
The utility model discloses a kind of twin-stage stretcher gear assemblies, belong to stretcher technical field.It includes driving gear, transmission gear, case lid, cabinet, set screw；The driving gear is made of the shaft of the hexagon socket head cap screw head at top, the gear part at middle part, lower part；The transmission gear is made of central axis and hollow gear, and the central axis below hollow gear is equipped with a circle limiting slot.Transmission gear is divided into two parts of central axis and hollow gear, and when being driven power rotation, hollow gear set rotates on center shaft, central axis not with hollow gear unitary rotation, the abrasion that transmission gear can be reduced prevents damaged cracking, extends transmission gear service life；It is worn after transmission gear long-time use, it is only necessary to replace hollow gear part, reduce maintenance cost.
Description
Technical field
The utility model relates to a kind of twin-stage stretcher gear assemblies, belong to stretcher technical field.
Background technique
Bolt tensioning jack is a kind of tools for bolts ' pretension and extracting tool, it is will by the hydraulic cylinder structure of stretcher main body
Bolt tension pre-tightens, then drives the intracorporal preload gear of stretcher master by gear-box, pre-tightens geared sleeve on nut, completes to twist
Tight or dismantlement work.Stretcher is simple with product operation, easy to use, and safety height etc. is widely used in large diameter bolt
It pre-tightens.It was verified that hydraulic elongator is small to the damage of equipment, and coupling assembly uniform force, the high reliablity of bolt-connection.City
There is a kind of twin-stage stretcher on, includes driving gear, transmission gear in its gear-box, by external force rotational driving gear,
The rotation of gear band nutating gear is driven, transmission gear drives again pre-tightens gear and nut rotation.Currently, transmission gear is integrated
The central axis of structure, transmission gear can be rotated together with gear part, and the driving force that transmission gear is subject to is bigger, transmission gear
It rubs between fixation hole on central axis and gear-box, transmission gear will lead to biography therefore by excessive frictional resistance
Moving gear is more prone to produce abrasion, rupture；And integral replacing, higher cost are needed after damaging.
Summary of the invention
Technical problem to be solved by the utility model is to provide a kind of twin-stage stretcher gear assemblies, it is solved
The transmission gear in current twin-stage stretcher gear-box is determined and its problem of fixed structure is easily damaged.
Technical problem to be solved in the utility model takes following technical scheme to realize:
A kind of twin-stage stretcher gear assembly, it includes driving gear, transmission gear, case lid, cabinet, positioning spiral shell
Silk；
The driving gear is made of the shaft of the hexagon socket head cap screw head at top, the gear part at middle part, lower part, wherein in
Hex(agonal)screw head, shaft diameter be less than gear part diameter；
The transmission gear is made of central axis and hollow gear, and central axis is Step Shaft, and central axis upper end diameter is less than
Lower end diameter, central axis lower end diameter are equal to hollow gear hollow hole internal diameter, and hollow gear is covered in central axis lower end, hollow gear
The central axis of lower section is equipped with a circle limiting slot；
Both the case lid, cabinet are fixed up and down by screw, case lid be equipped with accommodate hexagon socket head cap screw head upper through-hole,
The upper fixation hole of central axis upper end is accommodated, is equipped in cabinet and is accommodated the first lower fixed hole of shaft, accommodates central axis lower end
Driving gear is placed between upper through-hole, the first lower fixed hole, transmission gear is placed on upper fixation by the second lower fixed hole
Between hole, the second lower fixed hole, driving gear is meshed with transmission gear, and transmission gear exposes from cabinet side, and second is lower solid
Hole side is determined equipped with one and external perforative threaded hole, and set screw is out of, threaded hole insertion central axis limiting slot；
The case lid, cabinet are equipped with the installation screw hole fixed with stretcher main body.
As preferred embodiment, both the case lid, cabinet are fixed up and down by four screws.
Working principle: stretcher main body is made of hydraulic cylinder, piston rod, preload gear ring, and piston rod coaxial line covers
In hydraulic cylinder, it is equipped with sealing cavity between the two, hydraulic cylinder side is equipped with the hydraulic oilhole being connected to sealing cavity, piston
It is equipped with hollow bolt hole in bar, preload gear ring is movably fixed in the hydraulic cylinder below piston rod, pre-tightens in the middle part of gear ring
Equipped with the hollow nut hole for accommodating nut, the hydraulic cylinder for pre-tightening gear ring side is equipped with opening, twin-stage stretcher gear drive
The case lid of device, cabinet are fixed on opening by installing screw hole, and transmission gear exposes from cabinet side, and pre-tighten gear ring
Engagement.
Drawing process: stretcher is covered on bolt, is pre-tightened gear snare on nut, by rotating piston rod, will be lived
Hollow bolt hole and the bolt end of stopper rod are tightened, and hydraulic oil are injected into sealing cavity by hydraulic oilhole, in bolt
Apply drawing force, tensile bolt within the scope of elastic deformation.
It tightens or disassembly process: after stretching, by the hexagon socket head cap screw head that poke rod is manually inserted into driving gear top
It is interior, the rotation of sliding tooth wheel is driven, transmission gear rotates with it, and pre-tightens gear ring under transmission gear drive, drives internal spiral shell
Mother's rotation, completion screws or dismantlement work.
By the hydraulic power that super-pressure pump provides, the elastic amplitude allowed using material will in its elastic deformation area
Bolt tension achievees the purpose that fastening or demounting bolt.In addition it can also be used as the device that hydraulic pressure excessively full connection applies axial force,
Carry out press installation.Especially in the working environment that seriously polluted or spatial area is restricted, using hydraulic strain device
It is that other any tools are all difficult to substitute, is the ideal technology equipment of large and medium-sized engineering goods assembling and maintenance of equipment, significantly
Improve construction working efficiency.
The beneficial effects of the utility model are: (1) transmission gear is divided into two parts of central axis and hollow gear, passed
When powered rotation, hollow gear set rotates on center shaft, and central axis with hollow gear unitary rotation, can not reduce driving cog
The abrasion of wheel prevents damaged cracking, extends transmission gear service life；(2) it is worn after transmission gear long-time use,
Hollow gear part is only needed replacing, maintenance cost is reduced；(3) central axis bottom is limited by set screw, prevents maintenance from tearing open
Central axis is inadvertently fallen off when unloading.
Detailed description of the invention
Fig. 1 is the utility model decomposition texture schematic diagram；
Fig. 2 is the utility model assembly structure diagram；
Fig. 3 is that the utility model is mounted on the structural schematic diagram in stretcher main body；
Fig. 4 is the structural schematic diagram of the utility model and stretcher main body.
In figure: driving gear 1, hexagon socket head cap screw head 11, gear part 12, shaft 13, transmission gear 2, central axis 21, in
Empty gear 22, limiting slot 23, case lid 3, upper through-hole 31, upper fixation hole 32, cabinet 4, the first lower fixed hole 41, the second lower fixed hole
42, threaded hole 43, set screw 5, installation screw hole 6, hydraulic cylinder 7, sealing cavity 71, hydraulic oilhole 72, piston rod 8, in
Empty bolt hole 81 pre-tightens gear ring 9, nut 91, bolt 92.
Specific embodiment
In order to which the technical means, creative features, achievable purpose and effectiveness to the utility model are easy to understand, tie below
Conjunction is specifically illustrating, and the utility model is further described.
As Figure 1-Figure 4, a kind of twin-stage stretcher gear assembly, it includes driving gear 1, transmission gear 2, case
Lid 3, cabinet 4, set screw 5；
Driving gear 1 is made of the shaft 13 of the hexagon socket head cap screw head 11 at top, the gear part 12 at middle part, lower part,
Middle hexagon socket head cap screw head 11, shaft 13 diameter be less than 12 diameter of gear part；
Transmission gear 2 is made of central axis 21 and hollow gear 22, and central axis 21 is Step Shaft, 21 upper end diameter of central axis
Less than lower end diameter, 21 lower end diameter of central axis is equal to 22 hollow hole internal diameter of hollow gear, and 22 sets of hollow gear in central axis 21
Lower end, the central axis 21 of 22 lower section of hollow gear are equipped with a circle limiting slot 23；
Both case lid 3, cabinet 4 are fixed up and down by screw, and case lid 3 is equipped with the upper through-hole for accommodating hexagon socket head cap screw head 11
31, the upper fixation hole 32 of 21 upper end of central axis is accommodated, is equipped in cabinet 4 and is accommodated the first lower fixed hole 41 of shaft 13, accommodates
Driving gear 1 is placed between upper through-hole 31, the first lower fixed hole 41 by the second lower fixed hole 42 of 21 lower end of central axis, will
Transmission gear 2 is placed between fixation hole 32, the second lower fixed hole 42, and driving gear 1 is meshed with transmission gear 2, is driven
Gear 2 exposes from 4 side of cabinet, and 42 side of the second lower fixed hole is equipped with one and external perforative threaded hole 43, set screw 5
Out of, threaded hole 43 is inserted into central axis 21 limiting slot 23；
Case lid 3, cabinet 4 are equipped with the installation screw hole 6 fixed with stretcher main body.
Both case lid 3, cabinet 4 are fixed up and down by four screws.
Working principle: stretcher main body is made of hydraulic cylinder 7, piston rod 8, preload gear ring 9,8 coaxial line of piston rod
It covers in hydraulic cylinder 7, is equipped with sealing cavity 71 between the two, 7 side of hydraulic cylinder is equipped with the liquid being connected to sealing cavity 71
Pressure oil hole 72, piston rod 8 is interior to be equipped with hollow bolt hole 81, is movably fixed with preload gear in the hydraulic cylinder 7 of 8 lower section of piston rod
Circle 9 pre-tightens the hollow nut hole for being equipped in the middle part of gear ring 9 and accommodating nut 91, and the hydraulic cylinder 7 for pre-tightening 9 side of gear ring is equipped with
Opening, case lid 3, the cabinet 4 of twin-stage stretcher gear assembly pass through installation screw hole 6 and are fixed on opening, transmission gear 2
Expose from 4 side of cabinet, is engaged with gear ring 9 is pre-tightened.
Drawing process: stretcher is covered on bolt 92,9 sets of gear ring is pre-tightened on nut 91, by rotating piston rod
8, the hollow bolt hole 81 of piston rod 8 and 92 end of bolt are tightened, infused by hydraulic oilhole 72 into sealing cavity 71
Enter hydraulic oil, applies drawing force, tensile bolt 92 within the scope of 92 elastic deformation of bolt.
It tightens or disassembly process: after stretching, by the way that poke rod (being not drawn into figure) is manually inserted into 1 top of driving gear
In hexagon socket head cap screw head 11, driving gear 1 is driven to rotate, transmission gear 2 rotates with it, and pre-tightens gear ring 9 in 2 band of transmission gear
Under dynamic, internal nut 91 is driven to rotate, completion screws or dismantlement work.
By the hydraulic power that super-pressure pump provides, the elastic amplitude allowed using material will in its elastic deformation area
Bolt 92 stretches, and achievees the purpose that fastening or demounting bolt 92.In addition it can also be used as hydraulic pressure excessively full connection and apply axial force
Device carries out press installation.Especially in the working environment that seriously polluted or spatial area is restricted, using hydraulic tensioning
Device is that other any tools are all difficult to substitute, and is the ideal technology equipment of large and medium-sized engineering goods assembling and maintenance of equipment,
Substantially increase construction working efficiency.
Transmission gear 2 is divided into 22 two parts of central axis 21 and hollow gear, when being driven power rotation, hollow gear 22
It covers and is rotated on central axis 21, central axis 21 with 22 unitary rotation of hollow gear, can not reduce the abrasion of transmission gear 2, prevent
Only damaged cracking, prolongs the service life；It is worn after 2 long-time use of transmission gear, it is only necessary to replace hollow gear 22
Part reduces maintenance cost；21 bottom of central axis is limited by set screw 5, prevents central axis 21 when repair demolition from surprisingly falling
It falls.
The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above.Current row
The technical staff of industry it should be appreciated that the present utility model is not limited to the above embodiments, do not depart from the spirit of the present invention and
Under the premise of range, the utility model also has various changes and improvements, these changes and improvements both fall within the utility model and want
In the range of asking protection.The protection scope of the present invention is defined by the appended claims and their equivalents.
Claims (2)
1. a kind of twin-stage stretcher gear assembly, which is characterized in that it includes driving gear, transmission gear, case lid, case
Body, set screw；
The driving gear is made of the shaft of the hexagon socket head cap screw head at top, the gear part at middle part, lower part, wherein interior hexagonal
Screw terminal, shaft diameter be less than gear part diameter；
The transmission gear is made of central axis and hollow gear, and central axis is Step Shaft, and central axis upper end diameter is less than lower end
Diameter, central axis lower end diameter are equal to hollow gear hollow hole internal diameter, and hollow gear covers below central axis lower end, hollow gear
Central axis be equipped with one circle limiting slot；
Both the case lid, cabinet are fixed up and down by screw, and case lid is equipped with the upper through-hole for accommodating hexagon socket head cap screw head, receiving
The upper fixation hole of central axis upper end, interior be equipped with of cabinet accommodate the first lower fixed hole of shaft, accommodate the second of central axis lower end
Driving gear is placed between upper through-hole, the first lower fixed hole, transmission gear is placed on upper fixation hole, the by lower fixed hole
Between two lower fixed holes, driving gear is meshed with transmission gear, and transmission gear exposes from cabinet side, the second lower fixed hole side
Face is equipped with one and external perforative threaded hole, and set screw is out of, threaded hole insertion central axis limiting slot；
The case lid, cabinet are equipped with the installation screw hole fixed with stretcher main body.
2. a kind of twin-stage stretcher gear assembly according to claim 1, which is characterized in that the case lid, cabinet two
Person is fixed up and down by four screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920519462.2U CN209705191U (en) | 2019-04-17 | 2019-04-17 | A kind of twin-stage stretcher gear assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920519462.2U CN209705191U (en) | 2019-04-17 | 2019-04-17 | A kind of twin-stage stretcher gear assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209705191U true CN209705191U (en) | 2019-11-29 |
Family
ID=68648276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920519462.2U Active CN209705191U (en) | 2019-04-17 | 2019-04-17 | A kind of twin-stage stretcher gear assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209705191U (en) |
-
2019
- 2019-04-17 CN CN201920519462.2U patent/CN209705191U/en active Active
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