CN2270603Y - Torque indicating type wrench - Google Patents
Torque indicating type wrench Download PDFInfo
- Publication number
- CN2270603Y CN2270603Y CN 96233369 CN96233369U CN2270603Y CN 2270603 Y CN2270603 Y CN 2270603Y CN 96233369 CN96233369 CN 96233369 CN 96233369 U CN96233369 U CN 96233369U CN 2270603 Y CN2270603 Y CN 2270603Y
- Authority
- CN
- China
- Prior art keywords
- spanner
- wrench body
- wedge shape
- utility
- traveller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a torque indicating type wrench, belonging to the technical field of the general machine tool. The utility model solves the technical problem of the superposition assembly of the standard knot of the tower crane, etc. When the utility model assembles each standard knot according to the national standard prescription, screw bolts is exerted with sufficient pretightening force to ensure the quality of the superposition assembly and the safe of the construction. The utility model is characterized in that a torque indication mechanism is arranged on a wrench body, and the mechanism is composed of an inner sleeve of the wrench, a wedge-shaped sliding column, a compression spring system and a drive pin and shifting fork lever type pointer system. The utility model is a reliable tool for ensuring the connection of the screw bolts in the superposition assembly of the standard knot of the tower crane and the installation of various tall heavy duty devices.
Description
The utility model belongs to the conventional machinery technical field of tools.
In the modern architecture construction, used construction machineries such as derrick crane, building hoist in a large number, and the important structure parts of this class machinery are up to tens of rice even surpass hundred meters body of the tower, it is assembled by numerous high 2～4 meters standard knot stack.Generally then paying (bolts and nuts) by a plurality of high-strength bolts between each standard knot connects securely.Because this class mechanical structures characteristics and job specification are very high to its construction safety and functional reliability requirement, to reduce the possibility that equipment, the person or other accidents occur as far as possible.For this reason, when the countries concerned's standard all is defined in each standard knot of assembling, must apply enough pretightning forces to its attachment bolt.Not only be not applicable to the execution conditions of this class bolt but also can indicate the spanner that when tighting a bolt, adds torque value but still have at present, and generally only depend on experiential operating, so in installation process, whether Bolt Connection enough pretightning forces have been reached, the workmen is actually and feels unsure of, thereby in the work of tower machine, because this class is former thereby security incident that cause also happens occasionally.
Purpose; the torque spanner of selling on market only has two kinds; as general expression (dial type) and presetting system (AC type); but they all are not suitable for the standard knot stack assembling of above-mentioned machinery; its former because: 1. general expression (dial type) torque spanner; its operation principle is when leaning against fastening nut (or bolt head); because of the stressed relative resilient that is produced between Wrench head and wrenching bar and handgrip that makes is out of shape; thereby make pointer on dial, produce deflection and indicate add the size of torque value; but do pointer not only long but also thin; and not only wide but also thin dial is fixed on the elongated wrenching bar, the protecting sheathing of instrument can't be installed.Therefore the deadly defect of this spanner is to be easy to suffer collision, extrusion damage, thereby need can't to be used to work high above the ground, assembly yard (building site) condition difference and often to shift the installation of the above-mentioned construction machinery of construction site: 2. presetting system (AC type) torque spanner, can set (preset) torque value in advance, during operation, when applying moment of torsion above setting value, spanner promptly produces and skids, the shortcoming of this torque spanner is the increase and decrease situation that can not show moment of torsion in the process of tighting a bolt, and every change all need be readjusted when once setting value; 3. above-mentioned two kinds of torque spanneres all must be used with wrench socket, and the degree of depth of the plum blossom hole of wrench socket or hexagon ring (cover nut or bolt head are used) is limited, only allows the screw rod of bolt to surpass several height of buckleing of nut when fastening nut.But, in the installation of the standard knot of above-mentioned machinery,, often adopt double nut to compress in order to guarantee the reliability of Bolt Connection.Like this, the wrench socket that is used just is difficult to tighten the 1st nut.Based on above reason, above-mentioned two kinds of torque spanneres generally all can only be used for as fixing work-yard such as the cylinder assembling of automobile, tractor, the diameter of bolt is little and condition of work place preferably, are not suitable on the abominable construction machinery of assembled condition.
The purpose of this utility model, in view of develop rapidly along with the development of the national economy, the skyscraper emerge in multitude, in modern construction, a large amount of construction machineries such as derrick crane and building hoist that use, and a kind of safe and reliable tool wrench is badly in need of in the assembling of above-mentioned construction machinery, ad hoc meter exploitation is a kind of can to apply enough pretightning forces to its attachment bolt, can indicate again add the moment of torsion indicating type spanner of torque value, and be made into the series of products of compact conformation cost in light weight, easy to manufacture low and guarantee to superpose assembling quality, construction safety.
Structure of the present utility model is made up of with being threaded with wrenching bar (9) wrench body (1), be provided with at the left end inner chamber of wrench body (1) that cover (2) cooperates with wrench body in the spanner, putting making wedge shape notch in spanner combines with the left end of wedge shape traveller (3), right-hand member at the wedge shape traveller is provided with cylindrical helical compression spring (7), making internal thread at the right-hand member of wrench body is connected with screw rod (8), to overlap in the spanner, wedge shape traveller and cylindrical helical compression spring are formed a stressed system, finger (4) is set on wedge shape traveller (3), on wrench body, make straight-line guidance slotted eye (12), move as straight line by finger (4) restriction wedge shape traveller, straight-line displacement with torque conversion wedgewise traveller, and needle pivot (5) is set on wrench body, declutch lever formula pointer (6) is set on needle pivot, the fork slot of one end of shifting fork bar thick stick formula pointer links to each other with finger (4), when finger is done straight-line displacement, drive declutch lever formula pointer and do angular displacement, torque value scale plate (10) is set on wrench body, can read torque value by declutch lever formula pointer, and make protective cover (11), constitute moment of torsion indicating type spanner.
In spanner, can relatively rotate certain angle between the cover (2) in wrench body (1) and the spanner, and wedge shape traveller (3) can horizontally slip in the hole of wrench body (1) under external force.In the pre-installed timing of dispatching from the factory, the minimal torque M that should indicate according to design code
1, calculate the degree of depth that screw rod (8) should be screwed in the screwed hole of wrench body (1), be about to screw rod (8) and be threaded to this depth value, make the cylindrical helical compression spring (7) in the hole be subjected to compression stress P just
1, produce compression amount λ just
1, also make wedge shape traveller (3) be subjected to identical pressure P
1, and be crushed in the wedge-shaped slot of cover (2) in the spanner.Finger (4) is fixed on the wedge shape traveller (3), and is enclosed within the fork slot of pointer (6) after passing gathering sill on the wrench body (1).Moving of finger (4) can make pointer (6) rotate around needle pivot (5).
In the fastening nut process, the minimal torque M that should indicate less than design code as moment of torsion M that spanner applied
1Before, cover (2) is keeping rotating together in wrench body (1) and the spanner, and pointer (6) also remains on the sensing minimal torque value motionless.As moment of torsion M that spanner applied in case surpass M
1Value acts on the component P of normal pressure on wedge shape traveller (3) inclined-plane (this power is that cover (2) is gone up the counter-force of wedge-shaped slot inclined-plane to wedge shape traveller (3) inclined-plane in the spanner) along wedge shape traveller axis direction this moment
xTo act on initial pressure P on the wedge shape traveller greater than spring (7)
1, and both directions are opposite.Because P
x＞P
1So, will promote to produce displacement h to the wedge shape traveller to the right, spring is further compressed, its decrement (λ-λ
1)=h.M is big more, i.e. P
xBig more, then make displacement h and amount of spring compression (λ-λ
1) big more.Therefore, in the fastening nut process, the displacement h of wedge shape traveller (3) has reflected that spanner applies the size of moment of torsion M.Be also pointed out that when the wedge shape traveller moves wrench body (1) (being actually whole spanner) will relatively and overlap (2) and turn an angle in the spanner.
When wedge shape traveller (3) at P
x＞P
1During the situation lower slider, the finger (4) that is fixed on above it also moves right thereupon, thereby drives declutch lever formula pointer (6) around needle pivot (5) rotational angle θ, forwards the maximum θ of design to when pointer
Max(corresponding to the M of design
MaxAnd h
Max) time, pointer will stop at the M on the dial
MaxOn the graduation mark.After this, even the operator increases the screw-down torque value again, and pointer can not rotate yet again.But this moment, the operator should stop afterburning again, otherwise can damage spanner.As seen, the rectilinear motion of wedge shape traveller can not only be transformed into the rotation of pointer, but also play the effect of further amplification, make the operator can easily read pointer indicated torque value on dial by finger-declutch lever formula index system.Work as θ
MaxValue hour, rotational angle theta is linear basically with the moment of torsion M that is applied.The inventor determines θ by design for this reason
MaxSize, torque value indicating range and by the measures such as calibration before dispatching from the factory, can guarantee the pointing accuracy of its indicating meter.And on wrench body solid meter case of device, cover parts such as finger, pointer, needle pivot and dial, protect it to exempt to collide with, clash into or push impaired.Leave a window on shell, this window seals with transparent plexiglass plate, from the outside reading clearly.
The size of the several main parameters by designing suitable adjustment spanner just can change the size and the scope of the torque value that moment of torsion indicating type spanner can indicate, and the different size bolt is paid and the requirement of different pre-fastening moment values thereby can adapt to.Therefore, according to structure of the present utility model and operation principle, the series of products of producing a moment of torsion indicating type spanner will be designed and developed.The prospect of this product, the owning amount of present domestic tower machine and lift is very big, and demand is still continuing increase, and the torque spanner that never is suitable for, therefore, the potentiality in its market of the utility model product are very big, and the production unit of this class machinery and applying unit all are potential users.
Advantage of the present utility model and effect:
1. the size of the torque value in the time of accurately indicating fastening nut, construction safety is required high and the pretightning force of Bolt Connection had the assembling operation of the construction machinery that explicitly calls for, the not scientific method that when installation code save, has tighted a bolt by rule of thumb always and to have connected before having changed, thus the civilization in assembling and the security of machine work improved;
2. moment of torsion indicating mechanism is a mechanical type, and this mechanism is simple, reasonable, reliable, is not subjected to the influence of external environmental condition (electromagnetic field, temperature, humidity, dust etc.), can guarantee certain pointing accuracy, can satisfy the requirement of above-mentioned machinery to the Bolt Connection pretension;
3. compact conformation, in light weight particularly can stand to collide with, clash into or push, can be in operate as normal under the mal-condition;
4. easy to manufacture, cost is low, is convenient to promote.
Description of drawings:
Fig. 1. moment of torsion indicating type spanner structure figure
Fig. 2. moment of torsion indicating type spanner outside drawing (removing sequence number (11) protective cover)
Fig. 3. cover front view in the spanner
Fig. 4. cover side view in the spanner
Fig. 5. wedge shape traveller front view
Fig. 6. wedge shape traveller vertical view
Fig. 7. wedge shape traveller side view
Fig. 8. finger-declutch lever formula index system schematic diagram.
Sequence number among the figure: cover, (3) wedge shape traveller, (4) finger, (5) needle pivot, (6) declutch lever formula pointer, (7) cylindrical helical compression spring, (8) screw rod, (9) wrenching bar, (10) torque value scale plate, (11) protective cover, (12) straight-line guidance slotted eye, (13) wedge-shaped slot, (14) tapered end, (15) pin-shifting hole in (1) wrench body, (2) spanner.
Embodiment of the present utility model: the material of cover and wedge shape traveller adopts the high-quality steel in wrench body, the spanner, and through forging, machine cut processing and fabricating, cylindroid helical-coil compression spring can adopt cooperation part, gets product through factory-assembled.The debugging of relevant pretightning force and instrument is undertaken by the guidance of the design seminar.Treated related parameter after debugging accurately, it is fixing also the outside circumferential weld with wrench body that is threaded and wrenching bar can be added again welding.All workmans who has the factory of forging, machine cut processing and Equipment for Heating Processing and possess metal cutting processing technical ability can realize.
Claims (1)
1. torque spanner, form with being threaded with wrenching bar (9) by wrench body (1), it is characterized in that left end inner chamber at wrench body (1) is provided with that cover (2) cooperates with wrench body in the spanner, putting making wedge shape notch in spanner combines with the left end of wedge shape traveller (3), right-hand member at the wedge shape traveller is provided with cylindrical helical compression spring (7), making internal thread at the right-hand member of wrench body is connected with screw rod (8), to overlap in the spanner, wedge shape traveller and cylindrical helical compression spring are formed a stressed system, finger (4) is set on wedge shape traveller (3), on wrench body, make straight-line guidance slotted eye (12), move as straight line by finger (4) restriction wedge shape traveller, straight-line displacement with torque conversion wedgewise traveller, and needle pivot (5) is set on wrench body, declutch lever formula pointer (6) is set on needle pivot, the fork slot of one end of declutch lever formula pointer links to each other with finger (4), when finger is done straight-line displacement, drive declutch lever formula pointer and do angular displacement, torque value scale plate (10) is set on wrench body, can read torque value by declutch lever formula pointer, and make protective cover (11), constitute moment of torsion indicating type spanner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96233369 CN2270603Y (en) | 1996-07-02 | 1996-07-02 | Torque indicating type wrench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96233369 CN2270603Y (en) | 1996-07-02 | 1996-07-02 | Torque indicating type wrench |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2270603Y true CN2270603Y (en) | 1997-12-17 |
Family
ID=33910068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96233369 Expired - Fee Related CN2270603Y (en) | 1996-07-02 | 1996-07-02 | Torque indicating type wrench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2270603Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100408274C (en) * | 2003-11-24 | 2008-08-06 | 伊斯卡有限公司 | Torque indicating wrench |
| RU2446041C2 (en) * | 2010-03-15 | 2012-03-27 | Федеральное государственное образовательное учреждение высшего профессионального образования "Башкирский государственный аграрный университет" | Appliance for assembly of automotive diesel engine injection nozzles |
| CN103115706A (en) * | 2013-01-29 | 2013-05-22 | 江苏新洛凯机电有限公司 | Device and method for detecting torque of flat spiral springs |
| CN106541353A (en) * | 2017-01-27 | 2017-03-29 | 奉化市飞天人精密模具设计有限公司 | It is provided with the torque wrench of alarm function |
| CN106737329A (en) * | 2017-01-27 | 2017-05-31 | 奉化市飞天人精密模具设计有限公司 | It is provided with the alarm function torque wrench of transparent holddown plate |
-
1996
- 1996-07-02 CN CN 96233369 patent/CN2270603Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100408274C (en) * | 2003-11-24 | 2008-08-06 | 伊斯卡有限公司 | Torque indicating wrench |
| RU2446041C2 (en) * | 2010-03-15 | 2012-03-27 | Федеральное государственное образовательное учреждение высшего профессионального образования "Башкирский государственный аграрный университет" | Appliance for assembly of automotive diesel engine injection nozzles |
| CN103115706A (en) * | 2013-01-29 | 2013-05-22 | 江苏新洛凯机电有限公司 | Device and method for detecting torque of flat spiral springs |
| CN106541353A (en) * | 2017-01-27 | 2017-03-29 | 奉化市飞天人精密模具设计有限公司 | It is provided with the torque wrench of alarm function |
| CN106737329A (en) * | 2017-01-27 | 2017-05-31 | 奉化市飞天人精密模具设计有限公司 | It is provided with the alarm function torque wrench of transparent holddown plate |
| CN109822485A (en) * | 2017-01-27 | 2019-05-31 | 丽水市伊凡家模具科技有限公司 | Alarm function torque wrench equipped with transparent holddown plate |
| CN106737329B (en) * | 2017-01-27 | 2019-09-13 | 平湖市飞天人图文设计有限公司 | Alarm function torque wrench equipped with transparent holddown plate |
| CN106541353B (en) * | 2017-01-27 | 2019-09-13 | 平湖市飞天人图文设计有限公司 | Torque wrench equipped with alarm function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |