CN206767499U - A kind of limiter of moment - Google Patents
A kind of limiter of moment Download PDFInfo
- Publication number
- CN206767499U CN206767499U CN201720548336.0U CN201720548336U CN206767499U CN 206767499 U CN206767499 U CN 206767499U CN 201720548336 U CN201720548336 U CN 201720548336U CN 206767499 U CN206767499 U CN 206767499U
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- CN
- China
- Prior art keywords
- closed shell
- pressure measurement
- measurement plate
- limiter
- contact board
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Abstract
A kind of limiter of moment, including closed shell and second connecting rod affixed with closed shell top, include testing agency and pressure measuring mechanism inside closed shell, pressure measuring mechanism includes pressure measurement plate successively from top to bottom, head rod and contact board, the lower surface of pressure measurement plate is provided with multiple microswitches, the back-moving spring that pressure measurement plate lower surface is provided with is through contact board and is connected in the bottom surface of closed shell, head rod is vertically arranged with pressure measurement plate and the upper surface of head rod and pressure measurement plate are affixed, contact board is parallel with pressure measurement plate and contact board upper surface is provided with the contact being engaged with microswitch, testing agency at least two is used for the linearity for detecting pressure measurement plate.Effect is as return unit using back-moving spring, the minimum generation for avoiding the deformation of pressure measurement plate, the testing agency of setting can be with, it can be realized that the clear condition of deformation of pressure measurement plate, avoid causing the accident due to torquer, so that the security of whole device is higher.
Description
Technical field
It the utility model is related to a kind of safety device for preventing crane overload operation, more particularly to a kind of limitation of torque
Device.
Background technology
Limiter of moment be applied to jib-type crane tool safety guard, it can prevent crane because overload and
Operational error and trigger accident, make crane safe handling reach standardization and it is scientific.The operation principle of limiter of moment:
The curve of load table of crane is inputted in memory by programmable device first, then the work(for the human-computer dialogue window for passing through panel
Can, various duty parameters are given and set, main frame can work.Main frame gathers the signal from weight sensor, by signal
Amplification, then data signal is converted into by A/D converter, it is sent into microprocessor CPU and carries out computing, after comparing processing, on the one hand
Give display screen show correlation data, on the other hand with the pole of weight set in advance, amplitude, angle etc. in instrument internal
Limit value is compared, so as to judge current working condition.
Existing limiter of moment long-term use easilys lead to the pressure measurement plate deformation of induced inside, the acquisition signal made
Reaction slows up, and causes limiter of moment not reach due effect, is easily out of order after long-term use of, easily causes accident
Accident, existing torquer is also without the situation that can monitor the deformation of pressure measurement plate, it is impossible to which the very first time finds the survey of torquer
Pressing plate deformation, pressure measurement plate can cause limiter of moment to report by mistake or do not report, can cause great accident in the event of deforming
Occur.
Utility model content
The purpose of this utility model solves the survey that existing limiter of moment long-term use easilys lead to induced inside
Pressing plate deforms, and cannot monitor the situation of pressure measurement plate deformation, avoids causing the accident due to torquer etc. and asks
Topic, so as to provide a kind of limiter of moment simple in construction, reasonable in design.
2nd, to achieve the above object, the technical scheme that the utility model is provided is as follows：A kind of limiter of moment, including it is closed
Housing and second connecting rod affixed with closed shell top, the closed shell inside include pressure measuring mechanism and testing agency,
The pressure measuring mechanism is sequentially provided with pressure measurement plate, head rod and contact board from top to bottom, and the lower surface of the pressure measurement plate is provided with
Multiple microswitches, the pressure measurement plate lower surface are additionally provided with back-moving spring, and the back-moving spring is through contact board and is connected
In the bottom surface of closed shell, the head rod is vertically arranged with pressure measurement plate and the upper surface of head rod is consolidated with pressure measurement plate
Connect, the head rod lower end is stretched out in outside closed shell after sequentially passing through contact board and closed shell, the contact board
Parallel and contact board and closed shell inner surface are affixed with pressure measurement plate, and closed shell is divided into two chambers up and down by contact board
Room, the contact board upper surface are provided with the contact being engaged with microswitch, and the testing agency is fixed in closed shell top surface
And testing agency at least two.
The beneficial effects of the utility model are：Using back-moving spring as return unit, minimum avoids the deformation of pressure measurement plate
Generation, while be provided with testing agency and can monitor the deformation of pressure measurement plate, pressure measurement plate can be recognized with the very first time
Clear condition is deformed, when deforming serious, torquer can be overhauled or changed, avoid causing thing due to torquer
Therefore occur, so that the security of whole device is higher.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is Fig. 1 B partial structurtes enlarged diagrams；
Fig. 3 is Fig. 1 A-A profiles.
Specific reference is as follows in figure：1st, closed shell, 2, pressure measurement plate, 3, contact board, 4, head rod, 5, reset
Spring, 6, microswitch, 7, contact, the 8, second connecting rod, 9, testing agency, 901, waterproof layer, 902, storage cavity, 903, swash
Optical displacement sensor, 10, dehydrating unit, 11, dustproof filter screen layer, 12, dedusting mechanism, 1201, electric pushrod, 1202, dedusting plate,
1203rd, the first rack, the 1204, second rack, 1205, gear, 13, inlet cylinder, the 14, the 3rd connecting rod, 15, closure
Embodiment
Below in conjunction with the accompanying drawings and preferred embodiment is further described with regard to the technical solution of the utility model.
As shown in Figure 1-Figure 3, a kind of limiter of moment, including closed shell 1 and affixed with the top of closed shell 1 second
Connecting rod 8, fairlead is provided with inside the second connecting rod 8, for through signal wire, closed shell 1 includes and pressure measuring mechanism and inspection
Mechanism 9 is surveyed, pressure measuring mechanism includes pressure measurement plate 2, head rod 4 and contact board 3, the following table of pressure measurement plate 2 successively from top to bottom
Face is provided with two microswitches 6, and contact board 3 be arranged in parallel with pressure measurement plate 2, and the both sides of contact board 3 and closed shell 1 are affixed, and
Contact board 3 divides closed shell 1 for upper and lower two chambers, and what is set in contact board 3 has two contacts to match with microswitch 6
7, for detecting pressure signal and being transferred to processor by the signal wire of the second connecting rod 8, the lower surface of pressure measurement plate 2 is additionally provided with multiple
Position spring 5, back-moving spring 5 passes through contact board 3 and is connected is mainly in the bottom surface of closed shell 1, the effect of back-moving spring 5
For after pressure measurement plate 2 is not by pulling force, making pressure measurement plate 2 recover initial position, head rod 4 is vertically arranged with pressure measurement plate 2
And the upper surface of head rod 4 and pressure measurement plate 2 are affixed, after the under tension of head rod 4, pressure measurement plate 2 is driven to moving down
It is dynamic, microswitch 6 is contacted pressed transport pressure signal with contact 7 to processor, processor is according to the different pressures received
Signal value takes different measures to prevent the overload operation of tower crane, and the lower end of head rod 4 sequentially passes through contact board 3 and closed
Stretched out after housing 1 outside closed shell 1, contact board 3 is parallel with pressure measurement plate 2 and the upper surface of contact board 3 is provided with and the phase of microswitch 6
The contact 7 of cooperation, the quantity of microswitch 6 are two, and substantially symmetrical about its central axis are arranged on the vertical of pressure measurement plate 2 under pressure measurement plate 2
Surface.
Testing agency 9 at least two, for detecting the linearity of pressure measurement plate 2.Testing agency 9 includes storage cavity 902
And laser displacement sensor 903, to store cavity 902 and the top surface of closed shell 1 is affixed, storage cavity 902 lower end is provided with spacing hole,
Because laser displacement sensor 903 is easy to generation damage of making moist, waterproof layer 901 is provided with the upside of spacing hole, is mainly
Protection laser displacement sensor 903 inner body will not produce damage because of making moist.Laser displacement sensor 903 is positioned at receipts
Receive within cavity 902, displacement sensor probe, by stretching out outside storage cavity 902, is arrived by spacing hole for detecting pressure measurement plate 2
The vertical distance of displacement sensor probe, consolidate away from one end that laser displacement sensor 903 is popped one's head in storing the top surface of cavity 902
Connect, and on the setting substantially symmetrical about its central axis vertically of closed shell 1, testing agency 9 is visited by detecting pressure measurement plate 2 to laser displacement device
The distance of head, each testing agency 9 can obtain a data, and two data are closer, prove that linearity is higher, pressure measurement
The deformation of plate 2 is just smaller, when two groups of gap datas are bigger, it was demonstrated that deformation is bigger, and torquer may produce wrong report and reaction
The problems such as not sensitive enough, so as to which can is overhauled or replaced to limiter of moment.
Ventilating opening is set in the bottom right of closed shell 1, dustproof filter screen layer 11 is provided with ventilating opening, is additionally provided with ventilating opening
Remove the dedusting mechanism 12 of dust on dustproof filter screen layer 11, because the working environment of limiter of moment is usually construction site, institute
Can be relatively more with dust, it is easy to which blocking dustproof filter screen causes air to be difficult to pass into inside closed shell 1, so entering
The dedusting mechanism 12 for removing dust on dustproof filter screen layer 11 is additionally provided with gas port, dedusting mechanism 12 includes electric pushrod 1201, removed
Dirt plate 1202 and gear 1205, electric pushrod 1201 are arranged on the lower end of the right hand external of closed shell 1, and electric pushrod 1201 is one
The rotary motion of motor kind is changed into the power-driven gear of the straight reciprocating motion of push rod, the one side of dedusting plate 1202 with
Dustproof filter screen layer 11 is slidably connected, and the another side of dedusting plate 1202 is provided with the first rack 1203 being meshed with gear 1205,
The 3rd connecting rod 14 is provided between gear 1205 and closed shell 1, the one end of the 3rd connecting rod 14 and closed shell 1 are affixed, and the 3rd
The other end of connecting rod 14 is rotatablely connected with gear 1205, and electric pushrod 1201, which provides power, makes the second rack 1204 do up and down reciprocatingly
Motion, the second rack 1204 is meshed with gear 1205, is rotated clockwise or counterclockwise so drive gear 1205, due to the
One rack 1203 is meshed with gear 1205, so that the first rack 1203 moves back and forth, because the first rack 1203 is with removing
Dirt plate 1202 is connected, and so as to drive dedusting plate 1202 to move back and forth, the final dust caused on dustproof filter screen layer 11 is scraped
Dedusting plate 1202 is wiped off.
In the further preferred scheme of the utility model, closed shell inside top surface is provided with dehydrating unit 10；At ventilating opening
Inlet cylinder 13 is set, and the top of inlet cylinder 13 sets closure 15；Wherein, dedusting mechanism 12 and dehydrating unit 10 pass through electrical connection
Temperature detect switch (TDS), temperature detect switch (TDS) are arranged in closed shell 1.Set whether closure 15 and effect can mainly be allowed with autonomous control
Air, which is entered inside closed shell 1, to be circulated, it is necessary to open closure 15 when air circulation, it is not necessary to when just
Closure 15 is closed, ventilating fan can also be set the inside of closed shell 1 again, dedusting mechanism 12, dehydrating unit 10 and ventilating fan are equal
Temperature detect switch (TDS) is connected to, temperature detect switch (TDS) is arranged in closed shell 1, and after temperature reaches certain temperature, temperature detect switch (TDS) is opened
Dedusting mechanism 12, dehydrating unit 10 and ventilating fan, are dehumidified and air exchange to the air of airtight cavity 1, ventilating fan
Effect is not only to accelerate the air circulation inside closed shell 1, and can be to one cooling of the inside of closed shell 1 progress
Effect, and dehydrating unit can dehumidify to the air of airtight cavity 1, prevent component from making moist, and avoid shortening torquer
Service life, made by such set-up mode the component inside closed shell 1 be at one it is metastable warm and humid
Spend environment so that the component service life inside closed shell 1 is longer.
The operation principle of the present embodiment is：Limiter of moment is arranged on the main limb of the main limb in front or rear of tower cap, by the
Two connecting rods 8 are fixed on the fixing point on main limb, and head rod 4 is fixed on into the stress point on main limb, and the one of signal wire
End is connected on contact 7 by the threading hole in the second connecting rod 8, and the other end is connected to processor.When limiter of moment receives
After the deformation pressure of main limb, head rod 4 therein is under the drive of deformation power so that compression reseting spring 5 simultaneously makes pressure measurement
Microswitch 6 on plate 2 contacts with the contact 7 of the upper surface of 7 plate of contact 3, then transmits pressure conversion everywhere in pressure signal
Manage device.When pressure value corresponding to processor receives tower crane hoisting weight, different measures is taken, reaches rated weight
When 95%, acousto-optic early warning is sent；When reaching the 100% of rated weight, sound and light alarm prompting is sent；Reach rated weight
When 105%, the control circuit that tower crane is run to dangerous direction is automatically cut off, but allows to run to safe direction, so as to reach peace
The purpose of full guard.And when pressure measurement plate 2 is reset to initial position by each back-moving spring 5, Liang Ge testing agencies 9 can pass through
The range data detected, and distance data transmission is judged whether pressure measurement plate 2 deforms into processor, it is whole so as to improve
The security of device.
In description of the present utility model, it is to be understood that term " first ", " second ", " the 3rd ", " upper end ", " under
End ", " left side ", " right side " " on ", " under ", "left", "right" etc. are only used for describing purpose, and it is not intended that instruction or implying phase
To importance or the implicit quantity for indicating indicated technical characteristic.Explanation is needed further exist for, the utility model not only may be used
Used with the longitudinal direction for such as scheming to place, horizontal can also use, be not limited to orientation expressed in figure.
Above-described is only principle of the present utility model and preferred embodiment.It should be pointed out that the common skill to this area
For art personnel, on the premise of the utility model principle is not departed from, moreover it is possible to make some variations and modifications, should be regarded as belonging to yet
In the scope of protection of the utility model.
Claims (7)
1. a kind of limiter of moment, including closed shell and second connecting rod affixed with closed shell top, it is characterised in that：
Include pressure measuring mechanism and testing agency inside the closed shell, the pressure measuring mechanism is sequentially provided with pressure measurement plate, the from top to bottom
One connecting rod and contact board, the lower surface of the pressure measurement plate are provided with multiple microswitches, and the pressure measurement plate lower surface is additionally provided with multiple
Position spring, the back-moving spring is through contact board and is connected in the bottom surface of closed shell, the head rod and pressure measurement
Plate is vertically arranged and the upper surface of head rod and pressure measurement plate are affixed, the head rod lower end sequentially pass through contact board and
Stretched out in after closed shell outside closed shell, the contact board is parallel with pressure measurement plate and contact board is consolidated with closed shell inner surface
Connect, and closed shell is divided into two chambers up and down by contact board, and the contact board upper surface is provided with and is engaged with microswitch
Contact, the testing agency is fixed in closed shell top surface and testing agency at least two.
A kind of 2. limiter of moment according to claim 1, it is characterised in that：The closed shell bottom right sets logical
Air port, dustproof filter screen layer is provided with the ventilating opening, the dedusting for removing dust on dustproof filter screen layer is additionally provided with the ventilating opening
Mechanism.
3. a kind of limiter of moment according to claim 2, the dedusting mechanism includes dedusting plate, gear and electronic pushed away
Bar, the dedusting plate one side are slidably connected with dustproof filter screen layer, and the dedusting plate another side is connected with to be meshed with gear
The first rack, the gear is connected on closed shell by the 3rd connecting rod, and the electric pushrod is connected with and gear phase
Second rack of engagement, the electric pushrod promote the second rack to move back and forth so as to which drive gear running drives the first rack fortune
Dynamic, the first rack drives dedusting plate moves back and forth.
A kind of 4. limiter of moment according to claim 1, it is characterised in that：The testing agency include storage cavity and
Laser displacement sensor, the storage cavity and closed shell top surface are affixed, and storage cavity lower end is provided with spacing hole, laser displacement
For sensor within storage cavity, the laser displacement sensor probe is external by stretching out containing cavities by spacing hole.
A kind of 5. limiter of moment according to claim 2, it is characterised in that：The closed shell inside top surface is provided with and removed
Wet device；Inlet cylinder is set at the ventilating opening, closure is set at the top of the inlet cylinder；Wherein, the dedusting mechanism and remove
Wet device electrically connects temperature detect switch (TDS), and the temperature detect switch (TDS) is arranged in closed shell.
A kind of 6. limiter of moment according to claim 1, it is characterised in that：The microswitch quantity is two, and
Vertical on pressure measurement plate substantially symmetrical about its central axis is arranged on pressure measurement plate lower surface.
A kind of 7. limiter of moment according to claim 4, it is characterised in that：The spacing hole upper end is provided with waterproof layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720548336.0U CN206767499U (en) | 2017-05-17 | 2017-05-17 | A kind of limiter of moment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720548336.0U CN206767499U (en) | 2017-05-17 | 2017-05-17 | A kind of limiter of moment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206767499U true CN206767499U (en) | 2017-12-19 |
Family
ID=60640117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720548336.0U Expired - Fee Related CN206767499U (en) | 2017-05-17 | 2017-05-17 | A kind of limiter of moment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206767499U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109019338A (en) * | 2018-09-21 | 2018-12-18 | 长沙中联恒通机械有限公司 | The limiter of moment control method of double hoisting crane |
-
2017
- 2017-05-17 CN CN201720548336.0U patent/CN206767499U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109019338A (en) * | 2018-09-21 | 2018-12-18 | 长沙中联恒通机械有限公司 | The limiter of moment control method of double hoisting crane |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171219 Termination date: 20180517 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |