WO2013026198A1

WO2013026198A1 - Spreading machine and ironing device thereof

Info

Publication number: WO2013026198A1
Application number: PCT/CN2011/078823
Authority: WO
Inventors: 余林; 刘兵华; 龚敬; 许辉; 彭志威
Original assignee: 长沙中联重工科技发展股份有限公司; 湖南中联重科专用车有限责任公司
Priority date: 2011-08-24
Filing date: 2011-08-24
Publication date: 2013-02-28

Abstract

An ironing device and a spreading machine having same. The ironing device comprises a basic ironing plate (10) and a lengthened ironing plate (40) connected thereto, and further comprises a clamping mechanism (30). The clamping mechanism (30) comprises: a driving system comprising a cylinder body (331), a piston (333) and a supporting rod (335), the supporting rod (335) passing through the basic ironing plate (10) and the lengthened ironing plate (40), and a first end of the cylinder body (331) being pressed against the lengthened ironing plate (40); a power system comprising a pressure source communicated with the cylinder body (331); an energy storage system comprising a spring component (321), a first end of the spring component (321) being pressed against a second end of the cylinder body (331); and a limit adjustment system comprising a first limit adjustment portion, the first limit adjustment portion and the supporting rod (335) being provided with a first position passing through the basic ironing plate (10) and a second position pressed against the basic ironing plate (10). When the ironing plate is lengthened, the ironing device is easy to mount, and fastening pieces do not need to be screwed up manually, so that the labor intensity of operators is reduced, and the mounting speed of the lengthened ironing plate is increased.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of road construction machinery, and more particularly to a paver and an ironing apparatus therefor. BACKGROUND OF THE INVENTION A screed is a working device of a paver, which is disposed at the rear of the paver and is responsible for completing the initial compaction and ironing tasks of the mixture. The operation function and the work quality of the paver are all determined by the ironing device. Realized. As shown in Figures 1 and 2, the screed consists essentially of a basic screed 10' (the basic screed of the retractable screed includes a main screed and a secondary screed), an extended screed 40' of various lengths, and the like. Both the basic screed 10' and the extended screed 40' are symmetrically distributed. Both the basic screed 10' and the extended screed 40' each include an end plate and a bottom plate 83', wherein the elongated screed 40' has an end plate for attachment on both sides. In the advancing direction of the paver as indicated by the direction of the arrow in Fig. 1, a hammer mechanism 82' is disposed directly in front of the bottom plate 83', and a hammer front baffle 8 is disposed in front of the hammer mechanism 82'. A vibrator is arranged on the screed box, and the tamper mechanism 82' and the vibrator are vibration systems with eccentric shafts. The basic screed 10' is mounted on the towing boom of the paver mainframe, and the entire screed is advanced by the mainframe. The extended screed 40'-side extension end plate 41' is attached to the base section end plate 1 of the base screed 10', and the extended side end plate 4' on the other side can be used to connect other extension screeds 40'. The screed includes a plurality of lengthened screeds 40' of different lengths. In order to achieve different working widths, the lengthening screed 40' is currently attached to each side by a human connecting bolt 30'. When attaching the screed 40', the front mounting bolts need to be lifted. The hammer front baffle 8 Γ leaves the wrench's operating space to tighten the bolts, and the installation space is limited. In addition, due to the limitations of the mechanism, the installation space here is very limited, so that the pre-tightening force of the bolts at this place is smaller than others. Under the vibration of the mechanism such as the tamper mechanism 82' and the vibration system, the bolt with a small preload force is easily loosened, resulting in insufficient clamping force between the two screeds. In addition, the screed is bonded with asphalt material after use, and it is difficult to lift the tamper front baffle 8 前 at the front of the screed, and sometimes even after the asphalt is cleaned. In addition, the extended screed 40' is heavy and takes a long time to install, and the operator is labor intensive and time consuming. In summary, the existing ironing device has the following disadvantages: 1. When installing the bolt on the front part of the screed, lift the hammer baffle in front of the tamper mechanism to leave the operating space of the wrench to tighten the bolt. When the screed is used, it will be bonded with asphalt. It is difficult to lift the front shovel front sill at the front of the screed, and sometimes it is necessary to clean the asphalt before it can be operated.

2. The length of the screed is very heavy, the pre-tightening force of the connecting bolt is large, and the labor intensity of the operator is great. 3. Due to the limited operation space of the wrench, the pre-tightening force of the mounting bolt at the front of the screed is smaller than other ones, and it is easy to loosen, which affects the overall rigidity of the screed, thereby affecting the paving quality of the road surface. SUMMARY OF THE INVENTION An object of the present invention is to provide a paver and an ironing apparatus thereof which are easy to install and which can reduce the labor intensity of an operator. The invention provides a screeding device comprising a basic screed and an elongated screed connected thereto, a clamping mechanism, a basic screed and an extended screed, the clamping mechanism comprising: a drive system, including a cylinder block, a piston and a support rod, the support rod passes through the basic screed and the extension screed, the support rod is coupled to the piston, and the first end of the cylinder is pressed against one of the elongated screed and the basic screed; the power system, including the pressure The source, the pressure source is connected to the cylinder; the energy storage system includes a spring assembly, the first end of the spring assembly is pressed against the second end of the cylinder; the limit adjustment system is connected with the support rod, and the limit adjustment system includes a first limit adjustment portion, the first limit adjustment portion and the support rod have a first position to pass through the basic screed, and a second position to press against the other of the elongated screed and the basic screed; When the tightening mechanism is in the clamped state, the cylinder body is filled with oil pressure; when the clamping mechanism is in the released state, the cylinder body releases the oil pressure. Further, the first limit adjustment portion includes a limit nut, and the limit nut is screwed to the support rod. Further, the basic screed is provided with an insertion hole and a positioning hole which are connected to each other, and the limiting nut and the support rod which are sleeved on the support rod pass through the insertion hole when the support rod is in the first position, and the limit nut and the support rod are at The second position is pressed against the edge of the positioning hole. Further, a spring assembly is interposed between the piston and the second end of the cylinder. Further, the piston opens a spring assembly guiding groove, and the spring assembly is compressively disposed between the bottom surface of the spring assembly guiding groove and the second end of the cylinder. Further, the second end of the piston is provided with a spring assembly guiding groove, and the spring assembly is compressively disposed in the spring assembly guiding groove. Further, the ironing device further includes a vertical adjusting portion including an adjusting member and a pressing member screwed to the adjusting member, and one end of the pressing member is coupled to the elongated screed. Further, the drive system further includes a pressure source connection pipe, one end of the pressure source connection pipe is in communication with the pressure source, and the other end is in communication with the interior of the cylinder block. Further, the first end of the cylinder is provided with a first end cover, and the second end is provided with a second end cover. The side of the first end cover facing the interior of the cylinder has a boss, and the boss faces the interior of the cylinder. The maximum distance of the end face along the axial direction of the support rod from the end face of the second end cover facing the inside of the cylinder body is H. The pressure source connection pipe has an oil inlet port, and the oil inlet port is axially oriented along the support rod. The maximum distance of the end face of the two end cap facing the inside of the cylinder is H ₂ , wherein H ₂ > H _lt) Further, the ironing device further comprises a connection force driving mechanism including an accumulator, an accumulator The first end is in communication with the pressure source, and the second end is in communication with the pressure source connection tube. The accumulator is used to maintain the oil pressure in the cylinder when the clamping mechanism is in the clamped state. Further, the connection force driving mechanism further includes a pressure monitoring mechanism connected to the pressure source connecting pipe for monitoring the internal pressure of the cylinder. Further, the connection force driving mechanism further includes an overflow mechanism that communicates with both the pressure source and the pressure source connection pipe for defining the internal maximum pressure of the cylinder. Further, the connection force drive mechanism further includes a shutoff valve that is in communication with both the pressure source and the pressure source connection pipe. The present invention also provides a paver comprising the aforementioned ironing device. Using the paver of the present invention and its ironing device, when extending the working width of the screed, the first end of the cylinder is pressed against the elongated screed, and the first limit adjustment portion is passed through the basic screed And in the first position, the spring assembly is in an initial compressed state; the first limit adjustment portion is adjusted from the first position to the second position, and then the pressure source connected to the cylinder is turned on, and is directed to the cylinder Internally input pressure oil, driven by hydraulic pressure, the first limit adjustment is pressed against the basic screed and the basic screed is clamped to the extended screed by hydraulic pressure. This screed and paver is easy to install when extending the screed, eliminating the need to manually tighten the fasteners, reducing the operator's labor intensity and speeding up the installation of the extended screed. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in FIG. In the drawing: BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a front elevational view of a prior art ironing apparatus, wherein the direction indicated by the arrow is the forward direction of the paver; Figure 2 is a side view of the prior art ironing apparatus; Figure 3 is a schematic view of the present invention; Figure 4 is a schematic view showing the structure of the clamping mechanism of the ironing device according to the present invention; Figure 5 is a schematic front view showing the lengthening screed of the ironing device according to the present invention; A side view of a basic screed of the screed apparatus of the present invention; FIG. 7 is a side elevational view of the screed apparatus in accordance with the present invention; and FIG. 8 is a side view of the screed of the screed apparatus in accordance with the present invention. Schematic. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. As shown in FIG. 3, the ironing apparatus in accordance with the present invention includes a base screed 10 and an elongate screed 40 coupled thereto, and a clamping mechanism 30 that connects the base screed 10 and the elongate screed 40. As shown in FIG. 4, the clamping mechanism 30 includes: a drive system including a cylinder block 331, a piston 333 and a support rod 335. The support rod 335 passes through the basic screed 10 and the elongated screed 40, and the support rod 335 is coupled to the piston 333. The first end of the cylinder block 331 is pressed against the elongated screed 40; the power system includes a pressure source, and the pressure source is in communication with the cylinder block 331; the energy storage system includes a spring assembly 321, and the first end of the spring assembly 321 is abutted Pressing on the second end of the cylinder block 331; the limit adjustment system is connected to the support rod 335, the limit adjustment system includes a first limit adjustment portion, and the first limit adjustment portion and the support rod 335 have a basic screed The first position of 10 and the second position against the basic screed 10. When the clamping mechanism is in the clamped state, the cylinder 331 is filled with oil pressure; when the clamping mechanism is in the released state, the oil pressure is released in the cylinder 331. To extend the working width of the screed, the first end of the cylinder 331 is pressed against the elongated screed 40, and the first limit adjustment portion is passed out of the basic screed 10 and in the first position, at which time the spring assembly 321 is in an initial compressed state. Then, the first limit adjusting portion is adjusted from the first position to the second position, then the pressure source communicating with the cylinder 331 is turned on, and the pressure oil is input to the inside of the cylinder 331, and driven by the hydraulic pressure, first The limit adjustment portion retracts and presses against the basic screed 10 and clamps the basic screed 10 to the extended screed 40 by hydraulic pressure. This kind of ironing device is easy to install the extended screed 40 when the screed is extended, no need for manual The fasteners are tightened so that the screed is not affected by the front bezel 81 of the tamper mechanism 82 when lengthened, which reduces the labor intensity of the operator and speeds up the installation of the screed 40. In addition, the cylinder block 331 can also be pressed against the basic screed 10, and the first limit adjustment portion is pressed against the elongated screed 40. It is worth noting that, for convenience of description, the screed to which the extension screed 40 is to be attached, which is already connected to the paver, is referred to as a basic screed 10; the screed to be connected outside the basic screed 10 is referred to as Lengthen the screed 40. Taking Figure 3 as an example, when there is only one screed on each side of the paver, the screed is referred to as the basic screed 10 at this time. When an extended operation is required, the screed connected thereto is referred to as an extended screed 40. When there are only two screeds on both sides of the paver and the lengthening operation is required, the screed to be connected to the paver is called the extension screed 40, and the connection to be connected is already connected to the paver at this time. The outermost screed is called the basic screed 10. According to an embodiment of the present invention, as shown in FIG. 4, the first limit adjustment portion includes a limit nut 314, and the limit nut 314 is screwed to the support rod 335. A limit nut 314 is disposed at one end of the support rod 335 and is threadedly coupled thereto. In the present embodiment, the first limit adjustment portion further includes a washer 313 disposed between the limit nut 314 and the basic screed 10. By adjusting the limit nut 314 and the washer 313, the distance between the washer 313 and the first end of the cylinder 331 and the clamping face of the elongated screed 40 can be adjusted to satisfy the basic screed 10 and the extended screed 40. The required distance between connections. After the power system is turned on, the washer 313 abuts against the basic screed 10, and the first end of the cylinder 331 abuts against the elongated screed 40 to complete the tight connection of the two connected members. As shown in Figures 3 and 4, the first end of the cylinder block 331 is detachably coupled to the elongated screed 40. At least two threaded holes 340 for attachment are provided on the first end of the cylinder block 331, and the cylinder 331 of the clamping mechanism is coupled to the elongated end plate 41 of the elongated screed 40 by the threaded holes 340. After the cylinder block 331 is mounted on the elongated end plate 41 of the elongated screed 40, as shown in FIG. 5, the distance L between the elongated end plate 41 and the washer 313 of the clamping mechanism is slightly larger than that of the basic screed 10 being connected. The thickness of the base end plate 11, the connection between the elongated screed 40 and the basic screed 10 is as shown in FIG. As shown in FIG. 6, the basic screed 10 is provided with a mounting hole 121 and a positioning hole 122 which are connected to each other, and are sleeved through the mounting hole when the limiting nut 314 of the support rod 335 and the support rod 335 are in the first position. 121. The limit nut 314 and the support rod 335 are pressed against the edge of the positioning hole 122 when in the second position. Preferably, as shown in FIG. 3, the ironing device further includes a vertical adjustment portion 20. In the present embodiment, the first limit adjustment portion further includes a washer 313 disposed between the limit nut 314 and the basic screed 10. The diameter of the loading hole 121 is larger than the diameters of the limiting nut 314 and the washer 313, so that in the first position, the limiting nut 314 and the washer 313 can move in the axial direction of the support rod 335, penetrate from the loading hole 121 or Wear it out. When the limit nut 314 and the washer 313 are in the second position, they are pressed against the edge of the positioning hole 122. The locating hole 122 has a diameter at least smaller than the washer 313, so that in the second position, the limit nut 314 and the washer 313 are pressed against the periphery of the locating hole 122. To extend the working width of the screed, the support rod 335 of the clamping mechanism 30 on the screed 40 is inserted into the corresponding loading hole 121 of the end plate 11 of the connected basic screed 10, and then placed in the positioning hole 122. Then, the adjustment vertical adjustment portion 20 is adjusted so that the bottom plates 83 of the adjacent two screeds are on the same horizontal plane. As shown in FIG. 3, the vertical adjustment portion 20 includes an adjustment member 21 and a pressing member 22 screwed to the adjustment member 21, and one end of the pressing member 22 is coupled to the extension screed 40. In the present embodiment, the adjusting member 21 is an adjusting bolt which is screwed to the inverted "L"-shaped pressing member 22. The adjusting member 21 is pressed against the outer side of each connected basic screed, and the pressing member 22 is attached to the elongated screed 40. When the position of the elongated screed 40 needs to be adjusted, only the adjusting member 21 needs to be screwed. The pressing member 22 is driven to move in the vertical direction to drive the elongated screed 40 to move in the vertical direction. The arrangement of the vertical adjustment portion 20 allows the operator to conveniently and accurately adjust the position of the elongated screed 40. In addition, since the vertical adjustment portion 20 is provided on the outer side of the screed, it is easier to adjust. As shown in FIG. 4, the spring assembly 321 is interposed between the piston 333 and the second end of the cylinder block 331. Preferably, the second end of the piston 333 is provided with a spring assembly guiding groove, and the spring assembly 321 is compressively disposed between the bottom surface of the spring assembly guiding groove and the second end of the cylinder block 331. The first end of the piston 333 is fixedly coupled or detachably coupled to the support rod 335. The piston 333 is provided with a spring assembly guide groove recessed inside the piston 333, and the spring assembly 321 is disposed between the bottom surface of the spring assembly guide groove and the second end cover 323 of the second end of the cylinder 331. In the initial state of the clamping mechanism, the spring assembly 321 is in a compressed state, and under the force of the spring assembly 321, the end face A of the piston 333 is fitted to the end face B of the first end cap 332 at the first end of the cylinder block 331. . The first end cover 332 is a guiding end cover, which itself has a certain length along the axial direction of the support rod 335, and guides the movement of the support rod 335 passing therethrough to ensure the smoothness of the movement of the support rod 335. . As shown in FIG. 4, the drive system further includes a pressure source connecting pipe 334 having one end connected to the pressure source and the other end communicating with the inside of the cylinder 331. The pressure source connecting pipe 334 is disposed on the side of the cylinder block 331 and communicates with the inside of the cylinder block 331 for connecting the pressure source. Preferably, as shown in FIG. 4, the first end of the cylinder block 331 is provided with a first end cover 332, and the second end is provided with a second end cover 323, and the side of the first end cover 332 facing the inside of the cylinder block 331 has Boss, the boss facing the cylinder 331 The inner end face has a maximum distance Hi from the end face of the second end cover 323 toward the inner side of the cylinder block 331 in the axial direction of the support rod 335, and the pressure source connection pipe 334 has an oil inlet port, and the oil inlet port supports the oil inlet port. The axial direction of the rod 335 is a maximum distance of 3⁄4 from the end face of the second end cover 323 facing the inside of the cylinder 331, wherein 3⁄4>3⁄4. In the present embodiment, the pressure source connecting pipe 334 is a fuel pipe joint, and the cylinder block 331 is fixedly coupled to the first end cap 332 with the boss and the oil pipe joint. The piston 333 is in the initial position before the hydraulic oil is introduced into the pressure source connecting pipe 334. Under the action of the spring assembly 321, the end face A of the piston 333 is brought into contact with the end face B of the boss. In the present embodiment, the arrangement of the boss and its positional relationship with the oil inlet ensures the communication between the oil inlet and the internal space of the cylinder 331. As shown in FIG. 7, the ironing device further includes a connection force driving mechanism including an accumulator 61, the first end of the accumulator 61 is in communication with the pressure source, and the second end thereof is in communication with the pressure source connection pipe 334. The accumulator 61 is for holding the oil pressure in the cylinder 331 when the clamp mechanism 30 is in the clamped state. The connection force drive mechanism further includes an overflow mechanism 63 that communicates with both the pressure source and the pressure source connection pipe 334 for defining the internal maximum pressure of the cylinder block 331. The connection force drive mechanism further includes a pressure monitoring mechanism 64 in communication with the pressure source connection pipe 334 for monitoring the internal pressure of the cylinder block 331. According to one embodiment of the invention, the overflow mechanism 63 is a relief valve and the pressure monitoring mechanism 64 is a pressure relay or a pressure sensor. The connecting force driving mechanism is composed of an accumulator 61, a shut-off valve 62 or other type of valve, a relief valve, a pressure relay or a pressure sensor which can block the oil passage, and the connecting force driving mechanism is connected by a hydraulic hose 65 at one end. The upper pressure source is connected to the other end to a hydraulic hose 65, and the end of the hydraulic hose 65 is provided with a quick joint 69. The connection force drive mechanism is mounted on the paver mainframe or the basic screed 10. Specifically, in the present embodiment, the quick joint 69 is directly connected to the pressure source connecting pipe 334 through the oil pipe distributing valve block 68 and the hydraulic oil pipe 67. The accumulator 61 holds the oil pressure in the cylinder 331 of the clamp mechanism 30 and replenishes the leakage of the hydraulic fluid of each hydraulic component to ensure the clamping force of the clamp mechanism. When the oil leaks and the oil pressure in the cylinder is reduced to the threshold set by the pressure relay or the pressure sensor, the connecting force driving mechanism opens the control switch to timely pressurize the cylinder 331. The maximum value of the charge is set by the relief valve. The clamping force of the clamping mechanism is always between the value set by the pressure relay or pressure sensor and the value set by the relief valve, ensuring sufficient clamping force between the two screeds. In addition, according to the actual situation, the pressure relay or the pressure sensor and the relief valve can be adjusted quickly and in time to obtain the clamping force of different clamping mechanisms, which can meet the connection of screeds of different specifications and sizes. As can be seen from the above, the force required for the connection of different screeds can be quickly adjusted according to the actual situation. As shown in Figures 7 and 8, the two interconnected screeds are connected by a plurality of clamping mechanisms. Since the plurality of clamping mechanisms are respectively connected to the aforementioned coupling force driving mechanism through the hydraulic oil pipe 67, the clamping forces of the respective clamping mechanisms 30 on the connecting end plates are substantially the same, so that the overall rigidity of the screed is good. In accordance with an embodiment of the present invention, to extend the working width of the screed, the support rod 335 of the clamping mechanism 30 on the elongated screed 40 is inserted into the corresponding loading of the base end plate 11 of the connected basic screed 10. After the hole 121, it is placed in the positioning hole 122. The adjustment member 21 is then adjusted so that the bottom plates 83 of the adjacent two screed are on the same level. The power system is connected by a connection drive mechanism, and a hydraulic hose 65 with a quick connector 69 on the connection force drive system is connected to the pressure source connection pipe 334 on the extension screed. The control switch of the connection force driving mechanism is opened, and under the driving of the hydraulic pressure, the flat washer 313 on the support rod 335 is fitted on the basic end plate 11 of the connected basic screed 10, and finally the adjacent two ironings are clamped. flat. When the extension screed 40 is removed, the control switch of the connection force drive mechanism is opened, the oil in the cylinder 331 of the clamp mechanism 30 is returned to the oil tank, and the quick connection 69 connected to the extension screed 40 is released. At this time, under the action of the spring assembly 321 at the end of the piston 333, the support rod 335 extends outward. The distance L between the elongated end plate 41 of the elongated screed 40 of the mounting clamp mechanism 30 and the flat washer 313 is slightly greater than the thickness of the base end plate 11 to which the basic screed 10 is to be attached, and the screed 40 is raised. The flat washer 313 on the clamping mechanism is withdrawn from the loading aperture 121 of the base end plate 11 of the attached basic screed 10. Thereby the lengthening screed 40 is removed from the entire paver. The quick loading and unloading screed of the invention can realize the rapid assembly and disassembly of the extended screed according to the variation of the paving work width, and greatly reduces the labor intensity of the operator, saving time and labor. And it is not affected by the vibration of the mechanism such as the hammer, vibrator, etc., and its clamping force is always kept within the preset range. The screed has sufficient overall rigidity to ensure paving quality. The present invention also provides a paver comprising the aforementioned ironing device. The paver of the present invention can quickly realize the loading and unloading of the screed according to the required width of the paved road surface, and the connecting force of the connecting end plates is substantially the same, which improves the overall rigidity of the screed. In addition, the paver of the present invention can quickly adjust the connection force according to the actual situation, thereby ensuring a stable connection between the screeds and ensuring the paving quality of the road surface. From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: 1. The screed of the paver is not affected by the front baffle of the hammer when lengthened;

2. It is no longer necessary to manually tighten the fasteners, and the operator has low labor intensity;

3. Loading and unloading long screeds is faster;

4. The clamping force of each clamping cylinder on the connecting end plate is basically the same, so that the overall rigidity of the screed is better; 5. The force required for the connection can be quickly adjusted according to the actual situation. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A screed apparatus comprising a basic screed (10) and an elongated screed (40) coupled thereto, further comprising a clamping mechanism (30) connecting the basic screed (10) and The extended screed

(40), the clamping mechanism (30) comprises:

a drive system comprising a cylinder (331), a piston (333) and a support rod (335), the support rod (335) passing through the basic screed (10) and the elongated screed (40), A support rod (335) is coupled to the piston (333), and a first end of the cylinder (331) is pressed against one of the elongated screed (40) and the basic screed (10) ;

a power system including a pressure source, the pressure source being in communication with the cylinder block (331); an energy storage system including a spring assembly (321), the first end of the spring assembly (321) being pressed against the cylinder The second end of the body (331);

a limit adjustment system, connected to the support rod (335), the limit adjustment system includes a first limit adjustment portion, and the first limit adjustment portion and the support rod (335) have a through-out a first position of the basic screed (10), and a second position against the elongated screed (40) and the other of the basic screed (10);

When the clamping mechanism is in the clamped state, the cylinder (331) is filled with oil pressure; when the clamping mechanism is in the released state, the oil pressure is released in the cylinder (331).

2. The ironing device according to claim 1, wherein the first limit adjustment portion includes a limit nut (314), and the limit nut (314) and the support rod (335) are threaded. connection.

3. The ironing device according to claim 2, wherein the basic screed (10) is provided with a mounting hole (121) and a positioning hole (122) that communicate with each other, and is sleeved on the support The limit nut (314) on the rod (335) and the support rod (335) pass through the loading hole (121) when the first rod is in the first position, the limit nut (314) and the support The rod (335) is pressed against the positioning hole when in the second position

The edge of (122).

4. The ironing device according to claim 1, wherein the spring assembly (321) is interposed between the piston (333) and the second end of the cylinder (331).

The ironing device according to claim 1, wherein the piston (333) defines a spring assembly guiding groove, and the spring assembly (321) is compressively disposed on a bottom surface of the guiding groove of the spring assembly. Between the second ends of the cylinders (331).

6. The ironing device according to claim 5, wherein the second end of the piston (333) is provided with a spring assembly guiding groove, and the spring assembly (321) is compressibly disposed on the spring assembly Guided in the slot.

7. The ironing device according to claim 1, further comprising a vertical adjustment portion (20) including an adjustment member (21) and a pressing member screwed to the adjustment member (21) ( 22), one end of the pressing member (22) is connected to the elongated screed (40).

8. The ironing apparatus according to claim 1, wherein the drive system further comprises a pressure source connection pipe (334), and one end of the pressure source connection pipe (334) is in communication with the pressure source. The other end thereof is in communication with the inside of the cylinder (331).

9. The ironing device according to claim 8, wherein the first end of the cylinder (331) is provided with a first end cover (332), and the second end is provided with a second end cover (323) a side of the first end cover (332) facing the inside of the cylinder (331) has a boss, and an end surface of the boss facing the inside of the cylinder (331) along the support rod (335) The axial direction is a maximum distance H from the end surface of the second end cover (323) facing the inside of the cylinder (331), and the pressure source connecting pipe (334) has an oil inlet. The maximum distance of the oil inlet port along the axial direction of the support rod (335) from the end surface of the second end cover (323) facing the inside of the cylinder block (331) is 3⁄4, wherein 3⁄4>3⁄4.

10. The ironing device according to claim 8, further comprising a connection force driving mechanism comprising an accumulator (61), a first end of the accumulator (61) and the pressure source In communication, the second end thereof is in communication with the pressure source connecting pipe (334), and the accumulator (61) is for the cylinder body when the clamping mechanism (30) is in a clamped state ( 331) The oil pressure inside is kept.

11. The ironing apparatus according to claim 10, wherein the connection force driving mechanism further comprises a pressure monitoring mechanism (64) in communication with the pressure source connection tube (334) for monitoring the The internal pressure of the cylinder (331).

12. The ironing apparatus according to claim 10, wherein the connection force driving mechanism further comprises an overflow mechanism (63) that is in communication with the pressure source and the pressure source connection pipe (334). , used to define the internal maximum pressure of the cylinder (331).

13. The ironing apparatus of claim 10, wherein the coupling force drive mechanism further comprises a shutoff valve (62) in communication with the pressure source and the pressure source connection tube (334).

A paving machine comprising the ironing apparatus according to any one of claims 1 to 13.