CN109914196B - Side tensioning device of ironing plate and paver - Google Patents
Side tensioning device of ironing plate and paver Download PDFInfo
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- CN109914196B CN109914196B CN201910244257.4A CN201910244257A CN109914196B CN 109914196 B CN109914196 B CN 109914196B CN 201910244257 A CN201910244257 A CN 201910244257A CN 109914196 B CN109914196 B CN 109914196B
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Abstract
The invention relates to the technical field of pavement construction machinery, and discloses a side tensioning device of a screed plate and a paver. The side tension apparatus of the screed comprises: the main body (1), the said main body (1) is fixed on paver; one end of the linear unit (3) is connected with an ironing plate of the paver; and the elastic unit (5), one end of the elastic unit (5) is connected to the main body (1), and the elastic unit (5) can deform under the traction state of the other end of the linear unit (3) and can provide a biasing force for restoring the deformation direction to the linear unit (3). The side tensioning device of the invention balances the position of the ironing plate through the deformation change of the elastic unit, and prevents the ironing plate from deforming in the using process.
Description
Technical Field
The invention relates to the technical field of pavement construction machinery, in particular to a side tensioning device of an ironing plate and a paver.
Background
When the spreading machine is constructed, the telescopic screed plate can generate backward deformation, namely a downward direction in the drawing, due to the resistance of the front material. When the extension length of the telescopic ironing plate is larger, the backward deformation is larger, and the construction quality is greatly reduced. In order to prevent the telescopic screed from deforming backwards during construction, a side tensioning mechanism is provided. In the construction process, the end part of the telescopic ironing plate is tensioned by the side tensioning mechanism through the steel wire rope, so that the telescopic ironing plate can be effectively prevented from deforming backwards.
Fig. 1 is a schematic structural diagram of a conventional paver. The number 16 is the machine body, a left telescopic ironing board and a right telescopic ironing board 4 are assembled on the machine body 16, and the telescopic ironing boards 4 can be outwards telescopic along a guide rail on the machine body 16. In the telescopic process, the hydraulic side tension mechanism 17 assembled on the main frame is connected and tensioned with the outside of the telescopic screed through a wire rope, so that the telescopic screed can be prevented from being deformed backward.
However, the side tensioning mechanism 3 of the prior art has the following disadvantages:
1. the side tightening mechanism is hydraulic, comprises a hydraulic pump 171, a hydraulic valve block 172 and a side tightening oil cylinder 173, and is difficult in oil pipe arrangement, long in pipeline and large in pressure loss;
2. in the process of stretching the telescopic ironing plate, the pressure of a hydraulic system is constant, the tension force provided by the side tensioning oil cylinder is constant and is not increased along with the increase of the extension length of the ironing plate;
3. the stroke of the side tensioning oil cylinder is large, and the required arrangement space of the whole structure is large.
Disclosure of Invention
The invention aims to provide a side tensioning device of a screed plate and a paver, which can provide proper tensioning force to prevent the screed plate from deforming in the using process.
In order to achieve the above object, the present invention provides a side tension apparatus of a screed, including:
the main body is fixed on the paver;
one end of the linear unit is connected with an ironing plate of the paver; and
and one end of the elastic unit is connected to the main body, and the elastic unit can deform under the traction state of the other end of the linear unit and can provide a biasing force for restoring the deformation direction to the linear unit.
Optionally, the side tensioning device of the screed further includes a sliding unit capable of sliding back and forth in the main body, the other end of the linear unit is used for drawing the sliding unit to slide along with the extension and retraction of the screed, one end of the elastic unit is connected to the main body, and the other end of the elastic unit is connected to the sliding unit so as to enable the elastic unit to extend and retract along the sliding direction through the sliding of the sliding unit.
Optionally, a plurality of guide rods extending along the sliding direction are arranged in the main body in parallel, and the sliding unit is sleeved on the guide rods and slides along the guide rods.
Optionally, each guide rod is sleeved with the elastic unit, and the elastic unit comprises a spring.
Optionally, the side tension means of the screed plate includes a guide pulley provided at an outer wall of the main body to guide the linear unit to be connected to the screed plate via the guide pulley.
Optionally, the side tensioning device of the screed plate includes a plurality of pulley blocks, each group of the pulley blocks includes a movable pulley and a fixed pulley which are oppositely arranged, the movable pulley is arranged on the sliding unit, the fixed pulley is arranged on the main body, and the linear unit sequentially and continuously penetrates through the fixed pulley and the movable pulley of each group of the pulley blocks.
Optionally, the pulley block and the elastic unit are disposed on the same side of the sliding unit, and the fixed pulley is disposed on an inner wall of the main body opposite to the sliding unit.
Optionally, the pulley block includes a movable pulley seat for mounting the movable pulley and a fixed pulley seat for mounting the fixed pulley, and the linear unit is led out from the movable pulley seat in the first group of pulley blocks, sequentially passes through the group of fixed pulleys and the movable pulley, and then passes through the other groups of pulley blocks.
Optionally, a pre-tightening bolt is arranged on a wall of the main body opposite to the other side of the sliding unit, and an end of the pre-tightening bolt can abut against the sliding unit to adjust the pre-compression amount of the elastic unit.
A second aspect of the present invention provides a paving machine, comprising:
a body;
a pair of screed plates provided on the body and capable of moving toward or away from each other with respect to the body;
the side tensioning device is the side tensioning device of any scheme above, the number of the side tensioning devices is two, the side tensioning devices are all arranged on the machine body, and the linear unit of each side tensioning device is correspondingly connected to one ironing board.
Through the technical scheme, the side tensioning device provides proper tensioning force for the linear unit in the sliding process of the sliding unit through the deformation change of the elastic unit, and the tensioning force can be adaptively changed along with the expansion and contraction of the ironing plate so as to balance the position of the ironing plate and prevent the ironing plate from deforming in the using process. In addition, the device has simple mechanical structure and reliable work; complex hydraulic component pumps, control valves, hydraulic oil cylinders and electric control systems are not needed.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view of a prior art paver;
FIG. 2 is a schematic structural view of a side tension apparatus in an initial state according to an embodiment of the present invention;
FIG. 3 is a schematic view of the side tension device of FIG. 2 in an operating condition;
fig. 4 is a schematic illustration of the construction of one embodiment of the paving machine of the present disclosure in an initial and screed retracted state;
fig. 5 is a schematic view of the screed of the paver of fig. 4 in an extended state.
Description of the reference numerals
The hydraulic side tensioning device comprises a main body 1, a sliding unit 2, a linear unit 3, a ironing plate 4, an elastic unit 5, a guide pulley 6, a guide rod 7, a movable pulley 8, a fixed pulley 9, a movable pulley seat 10, a fixed pulley seat 11, a pre-tightening bolt 12, a top plate 13, a bottom plate 14, a supporting rod 15, a machine body 16, a hydraulic side tensioning mechanism 17, a hydraulic pump 171, a hydraulic valve block 172 and a side tensioning oil cylinder 173.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Referring to fig. 2 and 3, according to an aspect of the present invention, there is provided a side tension apparatus of a screed including:
the main body 1 is fixed on the paver 1;
one end of the linear unit 3 is connected with an ironing plate of the paver; and
and one end of the elastic unit 5 is connected to the main body 1, and the elastic unit 5 can deform under the traction state of the other end of the linear unit 3 and can provide a biasing force for restoring the deformation direction to the linear unit 3.
During the use process of the paver, the screed 4 can be automatically extended and retracted. During the extension process of the screed plate 4, the linear unit 3 is continuously pulled, at this time, the tensile force applied to the linear unit 3 will increase, and at the same time, the linear unit 3 will pull the elastic unit 5 to deform, and accordingly, the biasing force of the elastic unit 5 on the linear unit 3 for recovering the deformation direction of the elastic unit will also increase adaptively, so that the tension force applied to the screed plate 4 by the linear unit 3 is balanced with the tensile force applied to the linear unit 3; on the contrary, during the contraction of the screed 4, the pulling force applied to the linear unit 3 will be reduced, the deformation amount generated by the traction of the linear unit 3 on the elastic unit 5 will be reduced, and accordingly, the biasing force provided by the elastic unit 5 on the linear unit 3 for restoring the deformation direction of the elastic unit will also be reduced adaptively, and finally the screed 4 will be kept balanced in the state. It can be seen that by introducing the elastic unit 5, stability of the screed during use can be achieved, preventing the screed from deforming during use.
It will be appreciated that the resilient unit 5 may take any suitable form, provided that it is capable of deforming under a force and has a resilient force to recover the deformation. For example, a torsion spring structure, which can be wound around the shaft, the linear unit 3 can pull the torsion spring to deform the torsion spring during the operation of the screed plate, and the torsion spring can provide a biasing force to the linear unit 3 in the direction of restoring the deformation to maintain the balance of the forces.
Alternatively, the elastic unit 5 may be indirectly deformed by other means. As one embodiment, the side tension apparatus of the screed further includes a sliding unit 2 capable of sliding back and forth in the main body 1, the other end of the linear unit 3 is used for drawing the sliding unit 2 to slide along with the extension and contraction of the screed 4, one end of the elastic unit 5 is connected to the main body 1, and the other end of the elastic unit 5 is connected to the sliding unit 2 so as to extend and contract the elastic unit 5 in the sliding direction by the sliding of the sliding unit 2. In this case, the elastic unit 5 may adopt a common coil-shaped spring structure, in which the linear unit 3 is continuously pulled during the extension of the screed 4, the tensile force applied to the linear unit 3 is increased, and the linear unit 3 pulls the sliding unit 2 to slide along the extension direction of the screed 4, accordingly, the sliding of the sliding unit 2 compresses the elastic unit 5 in the sliding direction, and the biasing force provided by the elastic unit 5 to the sliding unit 2 is adaptively increased.
Since the elastic unit 5 is continuously compressed during the extension of the screed plate 4, the biasing force provided by the elastic unit 5 to the sliding unit 2, i.e. the restoring force of the elastic unit 5, will increase with the adaptability to compression, and since the tensioning force of the linear unit 3 to the screed plate 4 during the extension is provided by the restoring force of the elastic unit 5, so to speak, the magnitude of the tensioning force can be adaptively increased along with the extension of the screed plate 4 through the compression change of the elastic unit 5, so as to ensure that the tensioning force can be balanced with the tension of the screed plate 4 to the linear unit 3, thereby realizing the stability of the screed plate during the use and preventing the screed plate from deforming during the use.
During the contraction of the screed plate 4, the pulling force applied to the linear unit 3 is reduced, the compression amount of the elastic unit 5 is reduced, the sliding unit 2 slides in the shortening direction of the screed plate 4 under the bias of the elastic unit 5, and the bias force applied to the sliding unit 2 by the elastic unit 5 is also reduced.
Since the elastic unit 5 is continuously extended and the compression amount is gradually reduced during the contraction of the screed 4, the biasing force provided by the elastic unit 5 to the sliding unit 2, i.e. the restoring force of the elastic unit 5, is adaptively reduced along with the elongation, and similarly, since the tension force of the linear unit 3 to the screed 4 is provided by the restoring force of the elastic unit 5, it can be said that the magnitude of the tension force can be adaptively reduced along with the shortening of the screed through the change of the elongation of the elastic unit 5, so as to ensure the balance with the tension force of the screed 4 to the linear unit 3.
Therefore, according to the technical scheme, the side tensioning device can provide proper tensioning force for the linear unit in the sliding process of the sliding unit through the stretching and retracting changes of the elastic unit in the stretching or contracting state of the ironing plate, and the tensioning force can be changed along with the stretching and retracting adaptability of the ironing plate, specifically, the tensioning force can be increased along with the increase of the extending length of the ironing plate and reduced along with the reduction of the extending length of the ironing plate, so that the position of the ironing plate is balanced, and the ironing plate is prevented from being deformed in the using process. In addition, the device has simple mechanical structure and reliable work; complex hydraulic component pumps, control valves, hydraulic oil cylinders and electric control systems are not needed.
The automatic stretching and retracting of the screed plate 4 is the same as that of a common paver in structure, and can be driven by a hydraulic mechanism and the like. During the sliding of the sliding unit 2, the elastic unit 5 is always under compression to stabilize the position of the screed 4, while the linear unit 3 will also be always under tension.
It should be noted that the main body 1 may be configured in any structure as long as it can be used to be fixed to the paver, for example, the main body 1 may be configured in a frame or box structure. In order to facilitate the sliding of the sliding unit 2, a plurality of guide rods 7 extending along the sliding direction are arranged in parallel in the main body 1, and the sliding unit 2 is sleeved on the guide rods 7 and slides along the guide rods 7.
Further, each guide rod 7 is sleeved with the elastic unit 5, and each elastic unit 5 comprises a spring. According to the above, the elastic unit 5 is sleeved on the guide rod 7, one end of the elastic unit is connected to the inner wall of the main body 1, and the other end of the elastic unit is connected to the sliding unit 2, so that the elastic unit 5 can be compressed to different degrees in the sliding process of the sliding unit 2.
In order to facilitate the extraction of the linear unit 3 for connection to the screed 4 and to prevent jamming during the stretching between the screed 4 and the linear unit 3, the side tensioning device of the screed comprises a guide pulley 6, the guide pulley 6 being disposed on the outer wall of the main body 1 to guide the connection of the linear unit 3 to the screed 4 via the guide pulley 6. Specifically, the outer wall of the main body 1 may be provided with a guide pulley seat, and the guide pulley 6 is rotatably disposed on the guide pulley seat.
In order to save the space of the main body 1, the side tensioning device of the ironing plate comprises a plurality of pulley blocks, each pulley block comprises a movable pulley 8 and a fixed pulley 9 which are oppositely arranged, the movable pulley 8 is arranged on the sliding unit 2, the fixed pulley 9 is arranged on the main body 1, and the linear unit 3 sequentially and continuously penetrates through the fixed pulley 9 and the movable pulley 8 of each pulley block.
For example, when two sets of pulley blocks are provided, the linear unit 3 passes through the fixed pulley 9 and the movable pulley 8 of the first set of pulley blocks and the fixed pulley 9 and the movable pulley 8 of the second set of pulley blocks in sequence and then is led out along the guide pulley 6.
Thus, when the elongation of the linear unit 3 is changed, the stroke can be shortened by the pulley block to be converted into a smaller compression of the elastic unit 5, so that the sliding unit 2 can slide in a suitable space range, reducing the requirement for the arrangement space in the main body 1.
Specifically, when the screed 4 is extended by the length W1, the linear unit 3 has a length L1, and the elastic unit 5 has a height H1; when the ironing board continues to extend outward, the extending length becomes W2, the length L2 of the linear unit 3, and the height H2 of the elastic unit 5.
The extending length is increased by △ W which is W2-W1;
increase of linear unit length is △ L-L2-L1;
the height variation of the elastic unit is △ H-H1-H2.
That is, the linear unit 3 stretches the length △ L outwards, the elastic unit 5 is compressed to the height △ H, and when the length increment △ L of the linear unit 3 is converted into the compression △ H of the elastic unit 5 due to the pulley block, △ H is greatly reduced compared to the case that the pulley block is not provided, and accordingly the sliding distance of the sliding unit 2 is also reduced.
Meanwhile, when the extended length of the screed plate 4 becomes larger, the amount of rearward (downward in the drawing) deformation of the screed plate 4 becomes larger, and thus the tensioning force F required to be provided by the wire rope becomes larger, and the tensioning force of the wire rope is provided by the restoring force F of the elastic unit 5. assuming that the spring unit 5 is a spring having a spring constant k, each spring restoring force F is k × △ H;
f, k, △ H;
as the extension length △ W of screed plate 4 increases, the amount of spring compression △ H increases, the spring return force F increases, and the tension force F increases, thus reducing the amount of screed plate deformation in the rearward direction.
When the screed plate 4 retracts, the extension length △ W becomes smaller, the backward deformation becomes smaller, the tensioning force required for the steel wire rope becomes smaller, and at the moment, the compression amount of the spring becomes smaller, so that the working condition requirement can be met.
In conclusion, when the screed plate 2 extends and contracts, the steel wire rope can always obtain a proper tension force due to the side tensioning device so as to balance the backward deformation amount of the screed plate 2.
In order to ensure the consistency of the length change of the linear unit 3 and the compression process of the elastic unit 5, the pulley block and the elastic unit 5 are arranged on the same side of the sliding unit 2, and the fixed pulley 9 is arranged on the inner wall of the main body 1 opposite to the sliding unit 2.
In addition, the pulley block comprises a movable pulley seat 10 for installing the movable pulley 8 and a fixed pulley seat 11 for installing the fixed pulley 9, and the linear unit 3 is led out from the movable pulley seat 10 in the first group of pulley blocks, sequentially passes through the group of fixed pulleys 9 and the movable pulley 8, and then passes through the rest groups of pulley blocks. The movable pulley seat 10 and the fixed pulley seat 11 are oppositely arranged on opposite wall surfaces of the sliding unit 2 and the main body 1.
In the use process of the whole device, the elastic unit 5 is always in a compressed state, and meanwhile, in order to ensure that the ironing plate 4 is still in a stable position in a non-working state, a pre-tightening bolt 12 is arranged on the wall of the main body 1 opposite to the other side of the sliding unit 2, and the end part of the pre-tightening bolt 12 can abut against the sliding unit 2 so as to adjust the pre-compression amount of the elastic unit 5. By adjusting the screw-in depth of the pretensioning screw 12, the precompression of the spring unit 5 can be adjusted accordingly.
The other side refers to the side opposite to the side of the sliding unit 2 provided with the elastic member 5, that is, the pretensioning bolt 12 and the elastic member 5 are respectively located on both sides of the sliding unit 2.
A second aspect of the present invention provides a paving machine, comprising:
a body;
a pair of ironing boards 4 disposed on the body and capable of moving toward or away from each other with respect to the body;
the number of the side tensioning devices is two, the side tensioning devices are arranged on the machine body, and the linear unit 3 of each side tensioning device is correspondingly connected to one ironing plate 4.
It should be noted that, because the moving directions of the pair of ironing plates 4 are opposite, the directions of the tension forces generated by the two side tension devices are opposite when the ironing plates are used, but the principles of the two side tension devices are the same, and specific reference may be made to the above description.
Through the technical scheme, in the using process of the paver, under the extension or contraction state of the screed plate at any time, proper tension can be provided for the linear unit in the sliding process of the sliding unit through the extension and contraction change of the elastic unit in the side tensioning device, and the tension can be adaptively changed along with the extension and contraction of the screed plate so as to balance the position of the screed plate and prevent the screed plate from deforming in the using process.
Of course, the machine body may be provided in any structure on the basis of satisfying the installation condition, and in this embodiment, the machine body includes a top plate 13, a bottom plate 14, and a support rod 15 for connecting the top plate 13 and the bottom plate 14, a pair of the screed plates 4 is provided on the bottom plate 14, and two side tension devices are provided on both sides of the top plate 13 corresponding to the screed plates 4.
It is to be noted that, when provided, the guide pulley 6 and the elastic unit 5 are both located on the same side of the main body 1 as the screed 4 controlled accordingly, and as an example in fig. 4 and 5, for the screed 4 on the right in the figure, the guide pulley 6 controlling the side tensioning means of the screed 4 is correspondingly located on the right side of the main body 1, and the elastic unit 5 and the pulley block are also located on the right side of the sliding unit 2 in the main body 1, where the sliding unit may be a sliding plate.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. A side tensioning device for a screed, comprising:
the main body (1), the said main body (1) is fixed on paver;
one end of the linear unit (3) is connected with an ironing plate of the paver; and
the elastic unit (5), one end of the elastic unit (5) is connected to the main body (1), and the elastic unit (5) can be deformed under the traction force state of the other end of the linear unit (3) and can provide a biasing force for restoring the deformation direction to the linear unit (3).
2. The side tightening apparatus of an ironing board according to claim 1, further comprising a sliding unit (2) capable of sliding reciprocally in the main body (1), the other end of the linear unit (3) being used to draw the sliding unit (2) to slide with the extension and contraction of the ironing board (4), and the other end of the elastic unit (5) being connected to the sliding unit (2) to make the elastic unit (5) to extend and contract in the sliding direction by the sliding of the sliding unit (2).
3. The side pulling apparatus of an ironing board according to claim 2, wherein a plurality of guide rods (7) extending in the sliding direction are provided in parallel inside the main body (1), and the sliding unit (2) is fitted over the guide rods (7) and slides along the guide rods (7).
4. A side pulling arrangement of a screed according to claim 3, characterised in that each of the guiding rods (7) is sleeved with the resilient unit (5), the resilient unit (5) comprising a spring.
5. The side pulling device of the screed according to claim 2, characterized in that the side pulling device of the screed comprises a guide pulley (6), the guide pulley (6) being provided at an outer wall of the main body (1) to guide the linear unit (3) to be connected to the screed (4) via the guide pulley (6).
6. The side tensioning device of an ironing board according to claim 2, characterized in that it comprises a plurality of groups of pulleys, each group of said groups of pulleys comprising a mobile pulley (8) and a fixed pulley (9) arranged opposite each other, said mobile pulley (8) being arranged on said sliding unit (2), said fixed pulley (9) being arranged on said main body (1), said linear unit (3) passing in succession, in turn, through the fixed pulley (9) and the mobile pulley (8) of each group of groups of pulleys.
7. The device for the lateral tightening of ironing boards according to claim 6, characterized in that the set of pulleys and the elastic unit (5) are arranged on the same side of the sliding unit (2) and the fixed pulley (9) is arranged on the inner wall of the body (1) opposite to the sliding unit (2).
8. The device for the lateral tightening of ironing boards according to claim 7, characterized in that the set of pulleys comprises a movable pulley seat (10) for mounting the movable pulley (8) and a fixed pulley seat (11) for mounting the fixed pulley (9), the linear unit (3) being led out from the movable pulley seat (10) of the first set of pulleys, passing through the set of fixed pulleys (9) and movable pulleys (8) in sequence, and then passing through the remaining sets of pulleys.
9. The side tightening device of a screed according to claim 7, characterised in that a pre-tightening bolt (12) is provided on a wall of the main body (1) opposite the other side of the sliding unit (2), an end of the pre-tightening bolt (12) being abuttable against the sliding unit (2) to adjust the pre-compression amount of the resilient unit (5).
10. A paving machine, comprising:
a body;
a pair of ironing plates (4) disposed on the body and capable of moving toward and away from each other with respect to the body;
side tightening devices according to any one of claims 1 to 9, the number of which is two and each of which is arranged on the machine body, the linear unit (3) of each side tightening device being connected to a corresponding one of the screed plates (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 CN109914196A (en) | 2019-06-21 |
| CN109914196B true CN109914196B (en) | 2020-01-10 |
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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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| CN (1) | CN109914196B (en) |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07279116A (en) * | 1994-04-11 | 1995-10-24 | Mitsui Toatsu Chem Inc | Soldering iron |
| US7695214B2 (en) * | 2007-05-07 | 2010-04-13 | Robert Mailand | Asphalt pavement remover |
| US20090092444A1 (en) * | 2008-12-03 | 2009-04-09 | Schoen Richard A | Double-bladed vibrating concrete screed |
| CN201678928U (en) * | 2010-04-08 | 2010-12-22 | 长沙中联重工科技发展股份有限公司 | Tensioning and position-limiting mechanism for front baffle of spreading machine |
| CN202644361U (en) * | 2012-06-26 | 2013-01-02 | 中联重科股份有限公司 | Screed device of paver and paver comprising the same |
| CN102720117B (en) * | 2012-06-27 | 2015-01-07 | 中联重科股份有限公司 | Screed and paver |
| CN202881827U (en) * | 2012-09-13 | 2013-04-17 | 三一重工股份有限公司 | Spreading machine and screed bending resisting device thereof |
| CN202969223U (en) * | 2012-12-07 | 2013-06-05 | 中联重科股份有限公司 | Screed plate side tension device and paver with same |
| CN204112193U (en) * | 2014-09-02 | 2015-01-21 | 中联重科股份有限公司 | Wirerope fixing device, tightening structure and paver |
| CN204435174U (en) * | 2014-12-05 | 2015-07-01 | 天津康远工程机械有限公司 | The paver that a kind of paving width is adjustable |
| CN204435178U (en) * | 2014-12-05 | 2015-07-01 | 天津康远工程机械有限公司 | A kind of hydraulic tensioning control system of paver screed of improvement |
| CN104452549A (en) * | 2014-12-05 | 2015-03-25 | 天津康远工程机械有限公司 | Paver with adjustable paving width |
| 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 |
-
2019
- 2019-03-28 CN CN201910244257.4A patent/CN109914196B/en not_active Expired - Fee Related
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| CN109914196A (en) | 2019-06-21 |
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