CN220612947U - Nut pre-tightening device - Google Patents
Nut pre-tightening device Download PDFInfo
- Publication number
- CN220612947U CN220612947U CN202322274958.7U CN202322274958U CN220612947U CN 220612947 U CN220612947 U CN 220612947U CN 202322274958 U CN202322274958 U CN 202322274958U CN 220612947 U CN220612947 U CN 220612947U
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- nut
- wall
- bolt
- sleeve
- tightening device
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- 239000003921 oil Substances 0.000 claims description 33
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 239000010720 hydraulic oil Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
Abstract
The utility model discloses a nut pre-tightening device which comprises a supporting seat, a stretching mechanism and a bolt, wherein an inner hexagonal limiting head is movably matched in the supporting seat, the stretching mechanism comprises an oil cylinder arranged at the top of the supporting seat, a piston arranged on the inner wall of the oil cylinder and a mounting sleeve arranged on the inner wall of the piston, an inner thread sleeve is detachably arranged on the inner wall of the mounting sleeve and the mounting sleeve, the inner thread sleeve is screwed on the outer wall of the bolt, a nut positioned in the inner hexagonal limiting head is arranged on the periphery of the bolt, and the nut pre-tightening device is arranged on the mounting sleeve through a fixing screw.
Description
Technical Field
The utility model relates to the technical field of nut pre-tightening devices, in particular to a nut pre-tightening device.
Background
In the equipment assembling process, a certain pretightening force is required to be achieved on the mounting bolts, so that the stress on the connecting parts is uniform, the smaller bolts are pretightened manually by using a spanner, and special tools are required to be used as assistance for the larger bolts so as to achieve the pretightening requirement.
At present, a nut pre-tightening device is generally adopted for pre-tightening installation, and the traditional nut pre-tightening device is required to be matched with a bolt to be stretched due to the fact that the specifications of the bolts are different, so that the nut pre-tightening device with threaded holes of different specifications is required to be configured, the suitability is poor, and the cost is high.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description summary and in the title of the application, to avoid obscuring the purpose of this section, the description summary and the title of the utility model, which should not be used to limit the scope of the utility model.
The present utility model has been made in view of the above and/or problems occurring in the use of nut pretensioning devices.
Therefore, the nut pre-tightening device is arranged on the mounting sleeve through the fixing screw, the inner thread aperture of the inner thread sleeve can be selected according to the outer diameter of the bolt to be stretched, the adapting range is wide, the dismounting is simple, the quantity of configuration equipment is saved, and the cost is saved.
In order to solve the technical problems, according to one aspect of the present utility model, the following technical solutions are provided:
a nut pretensioning device, comprising:
the inner hexagon limit head is movably matched in the support seat;
the stretching mechanism comprises an oil cylinder arranged at the top of the supporting seat, a piston arranged on the inner wall of the oil cylinder and a mounting sleeve arranged on the inner wall of the piston, wherein an inner thread sleeve is detachably arranged on the inner wall of the mounting sleeve and the mounting sleeve, and the inner thread sleeve is screwed on the outer wall of the bolt;
the periphery of the bolt is provided with a nut positioned inside the inner hexagonal limiting head.
As a preferable scheme of the nut pre-tightening device, the outer wall of the supporting seat is provided with a through groove, and the side wall of the inner hexagonal limiting head is provided with an inserting hole.
As a preferable mode of the nut pretensioning device according to the present utility model, a poking rod is inserted into the insertion hole, and the other end of the poking rod protrudes from the through groove and is provided with a grip.
As a preferable scheme of the nut pre-tightening device, a positioning groove is formed in the top of the mounting sleeve, and the top of the internal thread sleeve is fixed in the positioning groove through a fastening screw.
As a preferable scheme of the nut pre-tightening device, the side wall of the oil cylinder is provided with an oil inlet and an oil outlet, hydraulic oil is injected between the oil cylinder and the piston through a channel by the oil inlet and the oil outlet, and the bottom of the supporting seat is provided with an anti-skid gasket.
Compared with the prior art, the utility model has the following beneficial effects: the nut pre-tightening device is installed on the installation sleeve through the fixing screw, the inner thread aperture of the inner thread sleeve can be selected according to the outer diameter of a bolt to be stretched, the adaptation range is wide, the disassembly and assembly are simple, the number of configuration equipment is saved, and the cost is saved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following detailed description of the embodiments of the present utility model will be given with reference to the accompanying drawings, which are to be understood as merely some embodiments of the present utility model, and from which other drawings can be obtained by those skilled in the art without inventive faculty. Wherein:
FIG. 1 is a schematic view of the overall structure of a nut pretensioner according to the present utility model;
FIG. 2 is a schematic view of a part of a structure of a bolt in a stretched state of a nut pretensioning device according to the present utility model;
fig. 3 is a schematic view of a part of the structure of a nut tightening state of a nut pre-tightening device according to the present utility model.
100. A support base; 110. an inner hexagonal limit head; 111. a jack; 112. a poking stick; 120. an anti-slip washer; 200. a stretching mechanism; 210. an oil cylinder; 211. an oil inlet and outlet; 220. a piston; 230. a mounting sleeve; 231. an internal thread sleeve; 300. a bolt; 310. and (3) a nut.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings.
Next, the present utility model will be described in detail with reference to the drawings, wherein the sectional view of the device structure is not partially enlarged to general scale for the convenience of description, and the drawings are only examples, which should not limit the scope of the present utility model. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.
The nut pre-tightening device is arranged on the mounting sleeve through the fixing screw, the inner thread aperture of the inner thread sleeve can be selected according to the outer diameter of the bolt to be stretched, the adapting range is wide, the dismounting is simple, the quantity of configuration equipment is saved, and the cost is saved.
Fig. 1 to 3 are schematic structural views of an embodiment of a nut pre-tightening device according to the present utility model, referring to fig. 1 to 3, a main body portion of the nut pre-tightening device includes a supporting seat 100, a stretching mechanism 200 and a bolt 300.
The support seat 100 is supported on a flange on which the bolt 300 is mounted, friction is prevented from being increased and sliding is prevented by the anti-slip washer 120, when the bolt 300 is stretched to reach the pretightening force, the poking rod 112 is inserted into the jack 111 to abut against the outer wall of the nut 310, the poking rod 112 is broken off to enable the nut 310 to rotate, the nut 310 is used for screwing up the nut 310, so that the axial pretightening force of the bolt 300 is kept inside the bolt 300, in particular, the inner part of the support seat 100 is movably matched with the inner hexagonal limiting head 110, in the embodiment, a through groove is formed in the outer wall of the support seat 100, the jack 111 is formed in the side wall of the inner hexagonal limiting head 110, the poking rod 112 is inserted into the jack 111, the other end of the poking rod 112 extends out of the through groove and is provided with a grip, and the anti-slip washer 120 is arranged at the bottom of the support seat 100;
the stretching mechanism 200 rotates the mounting sleeve 230 to enable the internal thread sleeve 231 to be screwed on the bolt 300, the internal thread aperture of the internal thread sleeve 231 can be selected according to the outer diameter of the bolt 300 to be stretched, the internal thread sleeve 231 is mounted on the mounting sleeve 230 through a fixing screw, the adapting range is wide, the dismounting is simple, the quantity of configuration equipment is saved, the cost is saved, the external oil supply equipment is used, oil is injected between the oil cylinder 210 and the piston 220 through the oil inlet and outlet 211 through a pipeline, the piston 220 is pushed to rise, the mounting sleeve 230 and the internal thread sleeve 231 are driven to rise, and the bolt 300 is stretched, specifically, the stretching mechanism 200 comprises the oil cylinder 210 arranged at the top of the supporting seat 100, the piston 220 arranged on the inner wall of the oil cylinder 210 and the mounting sleeve 230 are detachably provided with the internal thread sleeve 231, the internal thread sleeve 231 is screwed on the outer wall of the bolt 300, in this embodiment, the top of the mounting sleeve 230 is fixedly arranged in the positioning groove through a fastening screw, the side wall of the oil cylinder 210 is provided with the oil inlet and outlet 211, the oil inlet and outlet 211 is arranged between the oil cylinder 210 and the bottom of the supporting seat 120 through the oil inlet and the oil outlet 211, and the bottom of the supporting seat 120 is arranged on the bottom of the oil inlet and outlet 211;
during the process of stretching the bolt 300, the nut 310 rises as the bolt 300 rises, and specifically, the outer circumference of the bolt 300 is provided with the nut 310 positioned inside the hexagon socket head 110.
Referring to fig. 1-3, in a specific use process of the nut pre-tightening device of the present embodiment, the installation sleeve 230 is rotated, so that the internal thread sleeve 231 is screwed on the bolt 300, the internal thread aperture of the internal thread sleeve 231 can be selected according to the outer diameter of the bolt 300 to be stretched, the nut 310 is installed on the installation sleeve 230 through a fixing screw, the adapting range is wide, the dismounting is simple, the number of configuration devices is saved, the cost is saved, the external oil supply device is used for injecting oil between the oil cylinder 210 and the piston 220 through the oil inlet and outlet 211 through a pipeline, the piston 220 is pushed to rise, the installation sleeve 230 and the internal thread sleeve 231 are driven to rise, the bolt 300 is stretched, the nut 310 rises along with the rising of the bolt 300 in the stretching process, and when the stretching bolt 300 reaches the pre-tightening force, the pulling rod 112 is inserted into the jack 111 to abut against the outer wall of the nut 310, the nut 310 is rotated by the pulling rod 112, the nut 310 is used for screwing the nut 310, and the axial pre-tightening force of the bolt 300 is kept inside the bolt 300.
Although the utility model has been described hereinabove with reference to embodiments, various modifications thereof may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the features of the disclosed embodiments may be combined with each other in any manner as long as there is no structural conflict, and the exhaustive description of these combinations is not given in this specification merely for the sake of omitting the descriptions and saving resources. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.
Claims (5)
1. A nut pretensioning device, comprising:
the support seat (100), the inside of the support seat (100) is movably matched with an inner hexagonal limiting head (110);
the stretching mechanism (200) comprises an oil cylinder (210) arranged at the top of the supporting seat (100), a piston (220) arranged on the inner wall of the oil cylinder (210) and a mounting sleeve (230) arranged on the inner wall of the piston (220), wherein an inner thread sleeve (231) is detachably arranged on the inner wall of the mounting sleeve (230) and the mounting sleeve (230), and the inner thread sleeve (231) is screwed on the outer wall of the bolt (300);
the outer periphery of the bolt (300) is provided with a nut (310) positioned inside the inner hexagonal limiting head (110).
2. The nut pre-tightening device according to claim 1, wherein the outer wall of the supporting seat (100) is provided with a through groove, and the side wall of the inner hexagonal limiting head (110) is provided with an insertion hole (111).
3. A nut pretensioning device according to claim 2, characterized in that a poking rod (112) is inserted into the insertion hole (111), and the other end of the poking rod (112) protrudes from the through groove and is provided with a grip.
4. A nut pre-tightening device according to claim 3, characterized in that the top of the mounting sleeve (230) is provided with a positioning groove, and the top of the female screw sleeve (231) is fixed inside the positioning groove by a fastening screw.
5. The nut pre-tightening device according to claim 4, wherein an oil inlet and outlet port (211) is provided on a side wall of the oil cylinder (210), hydraulic oil is injected between the oil cylinder (210) and the piston (220) through the oil inlet and outlet port (211), and an anti-slip washer (120) is provided on the bottom of the support base (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322274958.7U CN220612947U (en) | 2023-08-23 | 2023-08-23 | Nut pre-tightening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322274958.7U CN220612947U (en) | 2023-08-23 | 2023-08-23 | Nut pre-tightening device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220612947U true CN220612947U (en) | 2024-03-19 |
Family
ID=90227107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322274958.7U Active CN220612947U (en) | 2023-08-23 | 2023-08-23 | Nut pre-tightening device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220612947U (en) |
-
2023
- 2023-08-23 CN CN202322274958.7U patent/CN220612947U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |