CN109914196A - The side tension device and paver of screed - Google Patents
The side tension device and paver of screed Download PDFInfo
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- CN109914196A CN109914196A CN201910244257.4A CN201910244257A CN109914196A CN 109914196 A CN109914196 A CN 109914196A CN 201910244257 A CN201910244257 A CN 201910244257A CN 109914196 A CN109914196 A CN 109914196A
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- screed
- tension device
- side tension
- flexible element
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Abstract
The present invention relates to road surface construction machinery technical fields, disclose the side tension device and paver of a kind of screed.The side tension device of the screed includes: main body (1), and the main body (1) is fixed on paver；Linear unit (3), described linear unit (3) one end are connected to the screed of paver；And Flexible element (5), one end of the Flexible element (5) is connected to the main body (1), and the Flexible element (5) can deformation occurs and can the linear unit (3) be provided with the recovery nyctitropic biasing force of shape under the tractive force state by the linear unit (3) other end.Side tension device of the invention is changed by the deformation of Flexible element, to balance the position of screed, prevents screed from deforming in use.
Description
Technical field
The present invention relates to road surface construction machinery technical fields, and in particular, to a kind of side tension device of screed and booth
Paving machine.
Background technique
In construction, freely-moving mangle can be generated deformation backward, that is, be schemed paver due to the resistance by front material
In in downward direction.When freely-moving mangle extension is bigger, deflection backward is bigger, and construction quality just will be greatly reduced.
The deformation backward of freely-moving mangle in the construction process in order to prevent is provided with side tensioning mechanism.In the construction process, side tenses
Mechanism tenses freely-moving mangle end by wirerope, can be effectively prevented freely-moving mangle and deform backward.
As shown in Figure 1, being the structural schematic diagram of existing paver.Serial number 16 is body, is equipped on body 16 left and right
Freely-moving mangle 4, freely-moving mangle 4 can be along the guide rails on body 16 to external extension.In telescopic process, it is assemblied in host
Hydraulic side tensioning mechanism 17 on frame is connected and is tensioned with the outside of freely-moving mangle by wirerope, so as to prevent flexible press
Plate deforms backward.
But current this side tensioning mechanism 3 has the following deficiencies:
1, side tensioning mechanism is fluid pressure type, including hydraulic pump 171, hydraulic valve block 172, layback locking oil cylinder 173, oil pipe arrangement
Difficulty, pipeline is long, the pressure loss is big；
2, in freely-moving mangle telescopic process, hydraulic system pressure is constant, the constant guarantor of tightening force that layback locking oil cylinder provides
It holds constant, cannot increase with the increasing of screed extension；
3, the stroke of layback locking oil cylinder is big, and arrangement space needed for total is big.
Summary of the invention
The object of the present invention is to provide one kind to be capable of providing suitable tightening force to prevent screed from occurring in use
The side tension device and paver of the screed of deformation.
To achieve the goals above, the present invention provides a kind of side tension device of screed, comprising:
Main body, the main body are fixed on paver；
Linear unit, described linear unit one end are connected to the screed of paver；And
Flexible element, one end of the Flexible element are connected to the main body, and the Flexible element can be by described
Deformation occurs under the tractive force state of the linear unit other end and it is nyctitropic partially to provide the linear unit recovery shape
Pressure.
Optionally, the side tension device of the screed further includes the sliding list that can be reciprocatingly slided in the main body
Member, the other end of the linear unit is used to draw the sliding unit and is slided with the flexible of the screed, described
One end of Flexible element is connected to the main body, and the other end of the Flexible element is connected to the sliding unit by described
The sliding of sliding unit makes the Flexible element stretch along the glide direction.
Optionally, the body interior is equipped with multiple guide rods extended along the glide direction, the sliding unit in parallel
It is set on the guide rod and is slided along the guide rod.
Optionally, it is arranged with the Flexible element on each guide rod, the Flexible element includes spring.
Optionally, the side tension device of the screed includes leading block, and the leading block is arranged in the main body
Outer wall is to guide the linear unit to be connected to the screed through the leading block.
Optionally, the side tension device of the screed includes multiple pulley blocks, and pulley blocks described in every group include setting in opposite directions
The movable pulley and fixed pulley set, on the sliding unit, the fixed pulley is arranged on the body for the movable pulley setting,
The linear unit successively continues to pass through the fixed pulley and movable pulley of every group of pulley blocks.
Optionally, the same side of the sliding unit is arranged in the pulley blocks and the Flexible element, and described determines cunning
The inner wall opposite with the sliding unit of wheel setting on the body.
Optionally, the pulley blocks include movable pulley seat for installing the movable pulley and for installing the fixed pulley
Fixed pulley seat, the linear unit from first group of pulley blocks the movable pulley seat draw, successively pass through this group of fixed pulley
With after movable pulley using remaining each group pulley blocks.
Optionally, the wall opposite with the other side of the sliding unit of the main body is equipped with pretension bolt, described pre-
The end of tight bolt can be resisted against the sliding unit and is adjusted with the pre compressed magnitude to the Flexible element.
Second aspect of the present invention provides a kind of paver, comprising:
Body；
A pair of of screed, a pair of screed are arranged on the body and can lean on each other relative to the body
Close or remote from movement；
Side tension device, the side tension device are side tension device described in any of the above scheme, and the side tenses dress
The quantity set is two and is arranged on the body that the linear unit of each side tension device is correspondingly connected to one
The screed.
Through the above technical solutions, side tension device of the invention is changed by the deformation of Flexible element, in sliding unit
Suitable tightening force is provided to linear unit in sliding process, and the tightening force size can change with the flexible adaptability of screed
Become, to balance the position of screed, prevents screed from deforming in use.In addition, the mechanical structure letter of the device
It is single, reliable operation；Complicated hydraulic component pump, control valve, hydraulic cylinder and electric-control system are not needed.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the paver of the prior art；
Fig. 2 is the structural schematic diagram under the original state of the side tension device of one embodiment of the present invention；
Fig. 3 is the structural schematic diagram under the working condition of the side tension device of Fig. 2；
Fig. 4 is the structural schematic diagram under the initial and screed retracted mode of the paver of one embodiment of the present invention；
Fig. 5 is the structural schematic diagram under the screed elongation state of the paver of Fig. 4.
Description of symbols
1-main body, 2-sliding units, 3-linear units, 4-screeds, 5-Flexible elements, 6-leading blocks, 7-
Guide rod, 8-movable pulleys, 9-fixed pulleys, 10-movable pulley seats, 11-fixed pulley seats, 12-pretension bolts, 13-top plates, 14-
Bottom plate, 15-support rods, 16-bodies, 17-hydraulic side tensioning mechanisms, 171-hydraulic pumps, 172-hydraulic valve blocks, 173-sides
Drawing cylinder.
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
In conjunction with Fig. 2, Fig. 3, according to an aspect of the present invention, a kind of side tension device of screed is provided, comprising:
Main body 1, the main body 1 are fixed on paver；
Linear unit 3, described 3 one end of linear unit are connected to the screed of paver；And
Flexible element 5, one end of the Flexible element 5 are connected to the main body 1, the Flexible element 5 can by
Deformation occurs under the tractive force state of 3 other end of linear unit and can provide the linear unit 3 recovery deformation side
To biasing force.
In the use process of paver, the screed 4 is able to carry out automatic telescopic.It was extended in the screed 4
Cheng Zhong will persistently pull the linear unit 3, and the pulling force that the linear unit 3 is subject at this time will increase, while the linear list
Member 3 will draw Flexible element 5, and deformation occurs, and correspondingly, Flexible element 5 is to recovery Flexible element shape provided by linear unit 3
Nyctitropic biasing force also increases adaptability, so that the tightening force for the linear unit 3 that screed 4 is subject to and to linear unit 3
Pulling force balance each other；Conversely, the pulling force that the linear unit 3 is subject to will reduce, described in 4 contraction process of screed
The deformation quantity that linear unit 3 is allowed to generate to the traction of the Flexible element 5 becomes smaller, and correspondingly, Flexible element 5 is to linear unit
Restore the nyctitropic biasing force of Flexible element shape provided by 3 also to reduce adaptability, finally makes screed 4 in this state
Keep balance.As it can be seen that preventing screed by introducing Flexible element 5 so as to realize the stability of screed use process
It deforms in use.
It is understood that Flexible element 5 can use the structure type of any suitable, as long as it can ensure that in stress shape
Deformation occurs under state and has the elastic force for restoring deformation.Such as torsional spring structure, the torsional spring structure can be wound around on axis, line
Property unit 3 can draw torsional spring in the screed course of work and make torsional spring deformation occurs, while torsional spring can restore deformation again
Biasing force is provided to linear unit 3 on direction, with the balance of maintenance energy.
Alternatively, also Flexible element 5 can be made indirectly by other component, deformation occurs.As one such embodiment,
The side tension device of the screed further includes the sliding unit 2 that can be reciprocatingly slided in the main body 1, the linear unit
3 other end is used to draw the sliding unit 2 and is slided, the one of the Flexible element 5 with the flexible of the screed 4
End is connected to the main body 1, and the other end of the Flexible element 5 is connected to the sliding unit 2 by the sliding unit 2
Sliding so that the Flexible element 5 is stretched along the glide direction.At this point, Flexible element 5 can use common coil
Shape spring structure under the structure type, in 4 elongation process of screed, will persistently pull the linear unit 3, at this time
The pulling force that the linear unit 3 is subject to will increase, while the linear unit 3 will draw the sliding unit 2 along the ironing
4 prolonging direction of plate is slided, and correspondingly, the sliding of the sliding unit 2 will carry out in glide direction the Flexible element 5
Compression, the biasing force that the Flexible element 5 provides the sliding unit 2 at this time increases adaptability.
Since in 4 elongation process of screed, the Flexible element 5 is constantly compressed, therefore, the Flexible element 5 is right
The restoring force of the biasing force that the sliding unit 2 provides, i.e., the described Flexible element 5 will increase with compression adaptability, and due to
In elongation process, the linear unit 3 to the tightening force of the screed 4 is provided by the restoring force of the Flexible element 5,
It can be said that enabling the tightening force size with the elongation adaptability of screed 4 by the compression variation of the Flexible element 5
Increase, to guarantee that the tightening force can balance each other with pulling force of the screed 4 to the linear unit 3, is pressed to realize
The stability of plate use process, prevents screed from deforming in use.
And in 4 contraction process of screed, the pulling force that the linear unit 3 is subject to will reduce, the Flexible element 5
Decrement become smaller, the sliding unit 2 screed 4 described in the bias effect lower edge of the Flexible element 5 shorten direction into
Row sliding, meanwhile, the biasing force that the Flexible element 5 provides the sliding unit 2 also reduces adaptability.
Since in 4 contraction process of screed, the Flexible element 5 constantly replys elongation, and decrement is gradually reduced, because
This, the restoring force of the biasing force that the Flexible element 5 provides the sliding unit 2, i.e., the described Flexible element 5 will be with elongation
Adaptability reduces, similarly, since tightening force of the linear unit 3 to the screed 4 is returning by the Flexible element 5
Power is answered to provide, it may be said that by the variable elongation of the Flexible element 5, which can be with the shortening of screed
Adaptability reduces, to guarantee to balance each other with pulling force of the screed 4 to the linear unit 3.
As it can be seen that through the above technical solutions, side tension device of the invention under the elongation of screed or contraction state, all
Suitable tightening force can be provided to linear unit in sliding unit sliding process by the telescopic variation of Flexible element, and
The tightening force size can be with the flexible adaptive change of screed, specifically, tightening force can be with screed extension
Increase and increase, reduce with the diminution of extension, to balance the position of screed, prevent screed in use process
In deform.In addition, the mechanical structure of the device is simple, reliable operation；Complicated hydraulic component pump, control are not needed
Valve, hydraulic cylinder and electric-control system.
Wherein, the automatic telescopic of the screed 4 is identical as common paver structure, can by hydraulic mechanism etc. into
Row driving.Above-mentioned sliding unit 2 is in sliding process, and the Flexible element 5 is always in compressive state to stablize the ironing
The position of plate 4, and the linear unit 3 will also be in tension always.
It should be noted that the main body 1 can be arranged using arbitrary structures, as long as can be used to be fixed to the paver
, such as the main body 1 can be set to framework or body structure.For the sliding convenient for the sliding unit 2, the main body
1 interior parallel is equipped with multiple guide rods 7 extended along the glide direction, and the sliding unit 2 is set on the guide rod 7 and edge
The guide rod 7 is slided.
Further, the Flexible element 5 is arranged on each guide rod 7, the Flexible element 5 includes spring.Root
According to described above, the Flexible element 5 is set on the guide rod 7, and one end is connected to 1 inner wall of main body, and the other end is connected to
The sliding unit 2 can carry out different degrees of compression to realize to Flexible element 5 in 2 sliding process of sliding unit.
It draws for the ease of linear unit 3 to be connected to the screed 4, prevents from stretching between screed 4 and linear unit 3
Occurs bite phenomenon in the process, the side tension device of the screed includes leading block 6, and the leading block 6 is arranged in institute
1 outer wall of main body is stated to guide the linear unit 3 to be connected to the screed 4 through the leading block 6.Specifically, the master
It may be provided with leading block seat on 1 outer wall of body, and the leading block 6 is then rotatably arranged on leading block seat.
For the space setting for saving main body 1, the side tension device of the screed includes multiple pulley blocks, sliding described in every group
Wheel group includes the movable pulley 8 and fixed pulley 9 being oppositely arranged, and the movable pulley 8 is arranged on the sliding unit 2, described to determine cunning
Wheel 9 is arranged in the main body 1, and the linear unit 3 successively continues to pass through the fixed pulley 9 and movable pulley 8 of every group of pulley blocks.
For example, when two groups of pulley blocks are arranged, the linear unit 3 determines cunning for sequentially pass through first group of pulley blocks
After the fixed pulley 9 and movable pulley 8 of wheel 9 and movable pulley 8 and second group of pulley blocks, then along the leading block 6 extraction.
As a result, when the elongation of the linear unit 3 changes, it can be contracted to the trip by pulley blocks
It is short, to be converted to smaller 5 decrement of Flexible element, so that the sliding unit 2 can be slided within the scope of suitable space
It is dynamic, it reduces to the arrangement space demand in main body 1.
Specifically, as 4 extension W1 of screed, 3 length L1 of linear unit, 5 height H1 of Flexible element；Work as ironing
After plate continuation is protruding, extension becomes W2,3 length L2 of linear unit, 5 height H2 of Flexible element.
Extension incrementss: △ W=W2-W1；
Linear unit length incrementss: △ L=L2-L1；
Flexible element high variable quantity: △ H=H1-H2.
That is, linear unit 3 stretches out length △ L, Flexible element 5 is just by compression height △ H, and due to pulley
The effect of group, during the length incrementss △ L of linear unit 3 is converted into 5 decrement △ H of Flexible element, △ H is not relative to
It will greatly reduce in the case of setting pulley blocks, correspondingly 2 sliding distance of sliding unit will also be reduced.For example, using wirerope or
In the case of other flexible ropes are as linear unit, if there is n sections of wirerope between movable pulley and fixed pulley, △ H=△ L/n；
Wherein, wirerope number of segment can be it is any be greater than 1 positive integer, with shown in Fig. 2 and Fig. 3, for the n=3, △ H=△
Thus L/3 illustrates that the arrangement space to main body 1 will be substantially reduced by the way that pulley blocks are arranged between main body 1 and sliding unit 2
Demand.
Meanwhile when 4 extension of screed becomes larger, (in figure in downward direction) deflection is bigger backward for screed 4, thus
The tightening force F for needing wirerope to provide is also bigger.And the tightening force of the wirerope is provided by the restoring force f of Flexible element 5.
Assuming that spring unit 5 uses spring, the coefficient of elasticity of spring is k, then each spring-return power f=k* △ H；
The tightening force of wirerope in pulley blocks: F=n*f=n*k* △ H；
When 4 extension △ W of screed becomes larger, the decrement △ H of spring also accordingly becomes larger, and spring-return power f increases,
Tightening force F also accordingly becomes larger, and thus can be reduced the deflection of screed backward.
On the contrary, equally providing the tightening force of wirerope by the restoring force f of spring-compressed generation when screed 4 is shunk.
After screed retraction, extension △ W becomes smaller, and deformation moving distance becomes smaller, and the tightening force of wirerope is needed also to become smaller at this time, and this
When, the decrement of spring becomes smaller, and is just able to satisfy duty requirements.
To sum up, screed 2 it is overhanging and shrink when, due to the presence of side tension device, wirerope can obtain properly always
Tightening force, the deformation moving distance of Lai Pingheng screed 2.
For the consistency for guaranteeing 3 length of the linear unit variation and 5 compression process of Flexible element, the pulley blocks
The same side of the sliding unit 2 is set with the Flexible element 5, and the fixed pulley 9 be arranged in the main body 1 with
The opposite inner wall of the sliding unit 2.
In addition, the pulley blocks include movable pulley seat 10 for installing the movable pulley 8 and described determine cunning for installing
The fixed pulley seat 11 of wheel 9, the linear unit 3 are drawn from the movable pulley seat 10 in first group of pulley blocks, successively by being somebody's turn to do
Using remaining each group pulley blocks after group fixed pulley 9 and movable pulley 8.The movable pulley seat 10 and the fixed pulley seat 11 are set relatively
It sets on opposite wall surface on the sliding unit 2 and the main body 1.
In use, the Flexible element 5 is in compressive state to whole device always, meanwhile, to guarantee inoperative
The screed 4 is still in settling position under state, therefore, the main body 1 it is opposite with the other side of the sliding unit 2
Wall is equipped with pretension bolt 12, and the end of the pretension bolt 12 can be resisted against the sliding unit 2 with single to the elasticity
The pre compressed magnitude of member 5 is adjusted.It is screwed into depth by the adjusting pretension bolt 12, it is single can accordingly to adjust the elasticity
The pre compressed magnitude of member 5.
The above-mentioned other side is referred to that side opposite with the side that the sliding unit 2 is provided with elastomeric element 5, that is,
Say that the pretension bolt 12 and the elastomeric element 5 are located at the two sides of the sliding unit 2.
Second aspect of the present invention provides a kind of paver, comprising:
Body；
A pair of of screed, a pair of screed 4 are arranged on the body and can make each other relative to the body
Close to or far from movement；
Side tension device, the side tension device are side tension device described in any of the above scheme, and the side tenses dress
The quantity set is two and is arranged on the body that the linear unit 3 of each side tension device is correspondingly connected to one
A screed 4.
It should be noted that since the direction of motion of a pair of screed 4 is on the contrary, therefore two side tension devices use
When generate that tightening force is contrary, but the two principle is identical, specifically refers to record above.
Through the above technical solutions, in paver use process of the invention, the elongation of screed or contraction state at any time
Under, linear unit can be mentioned in sliding unit sliding process by the telescopic variation of Flexible element in the tension device of side
For suitable tightening force, and the tightening force size can with the flexible adaptive change of screed, to balance the position of screed,
Prevent screed from deforming in use.
Certainly, the body can be set as arbitrary structures on the basis of meeting mounting condition, in the present embodiment,
The body includes top plate 13, bottom plate 14 and the support rod 15 for connecting the top plate 13 and bottom plate 14, is pressed described in a pair
Plate 4 is arranged on the bottom plate 14, and two side tension devices correspond to the top plate 13 is arranged in the screed 4 two
Side.
It is worth noting that, when setting, the leading block 6 and the Flexible element 5 be respectively positioned on the main body 1 with phase
The ipsilateral position of the screed 4 that should be controlled, by taking Fig. 4 and Fig. 5 as an example, for the screed 4 on right side in figure, accordingly
The leading block 6 for controlling the side tension device of the screed 4 is arranged in the right side of the main body 1, and the Flexible element 5
The right side of the sliding unit 2 in the main body 1 is then similarly disposed at the pulley blocks, sliding unit here can be cunning
Movable plate.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited to above-mentioned realities
The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical solution of the present invention
Monotropic type, these simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (10)
1. a kind of side tension device of screed characterized by comprising
Main body (1), the main body (1) are fixed on paver；
Linear unit (3), described linear unit (3) one end are connected to the screed of paver；And
One end of Flexible element (5), the Flexible element (5) is connected to the main body (1), and the Flexible element (5) can be
Deformation occurs under tractive force state by the linear unit (3) other end and can provide the linear unit (3) extensive
The nyctitropic biasing force of complex.
2. the side tension device of screed according to claim 1, which is characterized in that the side tension device of the screed
It further include the sliding unit (2) that can be reciprocatingly slided in the main body (1), the other end of the linear unit (3) is for leading
Draw the sliding unit (2) to be slided, the other end connection of the Flexible element (5) with the flexible of the screed (4)
In the sliding unit (2) with the sliding by the sliding unit (2) make the Flexible element (5) along the glide direction into
Row is flexible.
3. the side tension device of screed according to claim 2, which is characterized in that main body (1) interior parallel is set
There are multiple guide rods (7) extended along the glide direction, the sliding unit (2) is set on the guide rod (7) and along described
Guide rod (7) is slided.
4. the side tension device of screed according to claim 3, which is characterized in that be arranged on each guide rod (7)
Have the Flexible element (5), the Flexible element (5) includes spring.
5. the side tension device of screed according to claim 2, which is characterized in that the side tension device of the screed
Including leading block (6), the leading block (6) is arranged in the main body (1) outer wall to guide the linear unit (3) through institute
It states leading block (6) and is connected to the screed (4).
6. the side tension device of screed according to claim 2, which is characterized in that the side tension device of the screed
Including multiple pulley blocks, pulley blocks described in every group include the movable pulley (8) and fixed pulley (9) being oppositely arranged, the movable pulley (8)
It is arranged on the sliding unit (2), the fixed pulley (9) is arranged on the main body (1), and the linear unit (3) is successively
Continue to pass through the fixed pulley (9) and movable pulley (8) of every group of pulley blocks.
7. the side tension device of screed according to claim 6, which is characterized in that the pulley blocks and the elasticity are single
First (5) setting in the same side of the sliding unit (2), and the fixed pulley (9) be arranged on the main body (1) with it is described
The opposite inner wall of sliding unit (2).
8. the side tension device of screed according to claim 7, which is characterized in that the pulley blocks include for installing
The movable pulley seat (10) of the movable pulley (8) and fixed pulley seat (11) for installing the fixed pulley (9), the linear unit
(3) it is drawn from the movable pulley seat (10) in first group of pulley blocks, successively after this group of fixed pulley (9) and movable pulley (8)
Using remaining each group pulley blocks.
9. the side tension device of screed according to claim 7, which is characterized in that the main body (1) with the cunning
The opposite wall in the other side of moving cell (2) is equipped with pretension bolt (12), and the end of the pretension bolt (12) can be resisted against
The sliding unit (2) is adjusted with the pre compressed magnitude to the Flexible element (5).
10. a kind of paver characterized by comprising
Body；
A pair of of screed, a pair of screed (4) are arranged on the body and can lean on each other relative to the body
Close or remote from movement；
Side tension device, the side tension device are side tension device described in any one of claim 1-9, the layback
The quantity of tight device is two and is arranged on the body that the linear unit (3) of each side tension device is corresponding to be connected
It is connected to the screed (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910244257.4A CN109914196B (en) | 2019-03-28 | 2019-03-28 | Side tensioning device of ironing plate and paver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910244257.4A CN109914196B (en) | 2019-03-28 | 2019-03-28 | Side tensioning device of ironing plate and paver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109914196A true CN109914196A (en) | 2019-06-21 |
| CN109914196B CN109914196B (en) | 2020-01-10 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910244257.4A Expired - Fee Related CN109914196B (en) | 2019-03-28 | 2019-03-28 | Side tensioning device of ironing plate and paver |
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| CN207003202U (en) * | 2017-07-20 | 2018-02-13 | 徐工集团工程机械股份有限公司 | Freely-moving mangle suspension arrangement |
| CN207176457U (en) * | 2017-08-23 | 2018-04-03 | 江苏金石稀土有限公司 | A kind of telescopic ironing board of spreading machine Anti-bending tension device |
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2019
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| CN109914196B (en) | 2020-01-10 |
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