Fixing device for heating rod of screed plate of paver

Abstract

The utility model discloses a paver screed plate heating rod fixing device which comprises a pressing plate, a mounting rod with a threaded hole, a first through hole penetrating through the pressing plate, a stud penetrating through the first through hole and mounted on a bottom plate, and a mounting assembly fixedly mounted on the upper end face of the pressing plate, the mounting rod comprises a rod body, a first boss, a connecting part and a second boss which are connected in sequence, the diameters of the first boss and the second boss are larger than those of the rod body and the connecting part, a second through hole is formed in the mounting assembly, the connecting part penetrates through the second through hole, and the diameter of the second through hole is smaller than those of the first boss and the second boss; and a side box plate of the screed plate box body is provided with a heating rod replacement port. The pressing and lifting effects on the pressing plate are achieved through the first boss and the second boss of the mounting rod respectively, when the heating rod needs to be quickly disassembled after pressing, the sleeve only needs to penetrate through the circular groove to rotate the mounting rod, then the heating rod can be loosened for replacement, the structure is simple, the quick disassembling efficiency is high, and the compressive strength of the mounting assembly is high.

Description

Technical Field

[0001] The utility model relates to a heating rod fixing device for a paving machine ironing board, belonging to the technical field of paving machines. Background Art

[0002] A paver is a type of construction machinery widely used on highways, railways, rural roads, and in confined spaces such as underground parking lots. Its primary function is to evenly lay asphalt, concrete, or water-stabilized materials on the road surface and compact the surface through vibration and other methods to ensure adequate flatness and density. During the paving process, the paver's performance directly impacts the quality and service life of the road, and the screed, as a key working device of the paver, plays a crucial role.

[0003] The screed plate is a critical component of the paver. It comes into direct contact with the asphalt and, through a heating device, maintains the asphalt at the proper temperature to ensure fluidity and workability. Asphalt temperature control has a crucial impact on paving results. Typically, the paver's baseplate temperature must be maintained within a certain range to prevent the asphalt from cooling or hardening too quickly during the paving process. If the temperature is too low, the asphalt loses its adhesion, resulting in unevenness or cracking on the paved surface, affecting the quality of the pavement and even hindering subsequent construction.

[0004] Uneven baseplate temperature is a common problem during paver operation. Uneven temperature distribution is often caused by a malfunction in the screed heating system or aging of the heating device. For example, a loose or damaged fixture on the heating rod can prevent the heating rod from effectively transferring heat to the screed, resulting in locally low temperatures and directly affecting the uniformity of asphalt heating. Furthermore, after prolonged use, especially after multiple paving operations, frequent vibrations can loosen heating system components, leading to poor contact between the heating rod and the baseplate, further exacerbating the uneven temperature distribution. Furthermore, the heating rod is typically located at the bottom of the screed housing. If damaged, the heating rod must be removed from the housing and replaced. This often requires the complete removal of the fixtures before replacement. After replacement, the fixtures must be reinstalled to secure the heating rod. This not only increases labor costs and involves tedious repetitive work, but also reduces work efficiency. Summary of the Invention

[0005] Purpose of the invention: In order to solve the above technical problems, the utility model provides a heating rod fixing device for a paving machine ironing plate. The device adopts a mounting rod to drive the pressure plate to follow the movement, thereby realizing the pressing and quick release of the heating rod, with a simple structure and high efficiency.

[0006] Technical solution: A heating rod fixing device for a paving machine ironing plate, comprising a pressure plate, a mounting rod with a threaded hole, and a first through hole passing through the pressure plate, wherein the heating rod is arranged between the bottom plate of the ironing plate box and the pressure plate, a stud passing through the first through hole is installed on the bottom plate, the mounting rod is threadedly connected to the stud, and further comprises a mounting assembly fixedly mounted on the upper end face of the pressure plate, the mounting rod comprising a rod body, a first boss, a connecting portion, and a second boss connected in sequence, the diameters of the first boss and the second boss being larger than the diameters of the rod body and the connecting portion, a second through hole being provided on the mounting assembly, the connecting portion passing through the second through hole and moving up and down in the second through hole, the diameter of the second through hole being smaller than the diameters of the first boss and the second boss, and a heating rod replacement port being provided on the side box plate of the ironing plate box.

[0007] The utility model discloses that when the heating rod needs to be pressed, in the initial state, the lower surface of the second through hole on the mounting assembly abuts against the upper surface of the second boss. As the mounting rod and the stud continue to rotate along the threaded connection, the pressing plate gradually contacts and abuts against the upper surface of the heating rod, and the second boss gradually disengages from the lower surface of the second through hole. The connecting portion and the second through hole undergo relative displacement, so that the lower surface of the first boss gradually abuts against the upper surface of the second through hole, and the lower surface of the second boss abuts against the upper surface of the pressing plate. After the mounting rod is installed, the heating rod is fixed. When the heating rod is damaged and needs to be replaced, it is only necessary to twist the mounting rod in the opposite direction to drive the pressing plate to disengage from the mounting rod. The heating rod can be pulled out from the replacement port, and a new heating rod can be reinserted, and then the mounting rod can be twisted to make the pressure plate press the heating rod tightly. The mounting assembly can set the pressure plate and the mounting rod into a linkage structure, that is, the mounting rod can simultaneously drive the pressure plate to move, which is not only convenient for pressing the heating rod, but also convenient for quick replacement of the heating rod. There is no need to open the upper box cover or completely remove the pressure plate and the mounting rod to achieve quick replacement of the heating rod. Moreover, since the mounting rod and the pressure plate have no contact with the upper box cover of the ironing plate box, the resonance of the paver during the paving process, which causes the pressure plate to loosen and the heating rod to loosen, is avoided. The structure is simple and can improve work efficiency.

[0008] Preferably, in order to facilitate the rapid installation of the mounting assembly, the mounting assembly includes side panels and an upper cover plate fixedly connected to each other, the side panels are arranged between the upper cover plate and the pressure plate, and are respectively arranged at both ends of the bottom surface of the upper cover plate, the side panels are fixedly connected to the pressure plate, the second through hole is opened on the upper cover plate, and the first through hole and the second through hole are coaxially arranged, and the distance from the lower surface of the first boss to the lower surface of the second boss is equal to the distance from the upper surface of the upper cover plate to the upper surface of the pressure plate.

[0009] The installation of the mounting assembly can be completed by simply welding the side panels to the pressure plate and then welding the upper cover plate. The structure is simple and easy to weld and install on site. In the initial state, the upper surface of the second boss abuts against the lower surface of the upper cover plate. After the pressing is completed, the lower surface of the first boss abuts against the upper surface of the upper cover plate, and the lower surface of the second boss abuts against the upper surface of the pressure plate.

[0010] Preferably, in order to facilitate the installation of the mounting rod, it also includes a first groove opened along the edge of the upper cover plate surface and a second groove opened along the edge of the side plate surface, the first groove is connected to the second through hole, the notch of the first groove is docked with the notch of the second groove, the groove width of the first groove is greater than the diameter of the connecting part and smaller than the diameter of the first boss and the second boss, and the groove width of the second groove is greater than the diameter of the second boss.

[0011] The connecting portion of the mounting rod and the second boss pass through the first groove and the second groove at the same time, so that the connecting portion enters the second through hole, and in the initial state, the upper surface of the second boss abuts against the lower surface of the upper cover plate, completing the installation of the mounting rod.

[0012] Preferably, in order to guide the stud and prevent the pressure plate from being squeezed and deformed, a guide block with a guide hole is provided on the bottom surface of the pressure plate, the guide hole is coaxially arranged with the first through hole, and the stud passes through the guide hole and the first through hole at the same time.

[0013] When the heating rod is finally tightened on the mounting rod, the compression between the second boss and the pressure plate will cause the pressure on the pressure plate at the first through hole to increase, resulting in concave deformation. The provision of the guide block increases the rigidity of the first through hole and reduces the occurrence of extrusion deformation.

[0014] Preferably, in order to limit the movement of the heating rod in the width direction, limit blocks are provided at both ends of the bottom surface of the pressure plate in the width direction of the heating rod, and the heating rod is provided between the limit blocks.

[0015] Preferably, in order to leave a rotation margin for the mounting rod, the thickness of the limit block and the thickness of the guide block are both smaller than the thickness of the heating rod.

[0016] When pressing the heating rod, avoid the limit block and the guide block from contacting the bottom plate before final tightening, which makes it impossible to final tighten the heating rod and the heating rod cannot be tightened. After the lower surface of the pressure plate abuts the upper surface of the heating rod, the heating rod can be limited as long as the distance between the lower surface of the limit block and the bottom plate is smaller than the distance between the upper surface of the heating rod and the bottom plate.

[0017] Preferably, in order to improve the compressive strength of the upper cover plate, the upper cover plate is a bent plate, including a first straight portion, a second straight portion, and a third straight portion. The two ends of the first straight portion are connected to the second straight portion and the third straight portion through the bent portions, respectively. The distance from the first straight portion to the pressure plate is greater than the distance from the second straight portion and the third straight portion to the pressure plate. The second through hole is arranged on the first straight portion, and the upper end surface of the side plate matches and abuts against the bottom surface of the upper cover plate.

[0018] The upper cover plate and the side plates are combined and designed to resemble an arch bridge structure, so that the pressure of the first boss on the first straight portion during final tightening is decomposed into a downward force and two outward thrusts, thereby reducing the degree of extrusion deformation of the first straight portion where the second through hole is located, reducing the pressure of the original first boss on the upper cover plate of the straight plate structure, and improving the compressive strength of the upper cover plate.

[0019] Preferably, in order to reduce the weight of the pressing plate, a weight-reducing through groove is provided on the pressing plate.

[0020] Preferably, in order to facilitate quick removal and replacement of the heating rod, the heating rod replacement port is arranged between the side box plate and the bottom plate of the ironing plate box in the same direction as the width direction of the heating rod, and the height of the heating rod replacement port is greater than the thickness of the heating rod.

[0021] Preferably, to facilitate rotation of the mounting rod without removing the upper cover, a circular groove is provided on the upper cover of the screed housing, the groove being coaxial with the mounting rod. The upper portion of the mounting rod has a hexagonal bolt head, which can be threaded into the mounting rod by passing a sleeve through the circular groove. A rubber stopper can be provided in the circular groove to prevent foreign matter from entering the housing.

[0022] Beneficial effect: The utility model drives the pressure plate to move by the installation rod, that is, the first boss and the second boss of the installation rod can respectively realize the pressing and lifting effects on the pressure plate. When the heating rod needs to be quickly removed after pressing, there is no need to remove the upper box cover. It is only necessary to use the sleeve to pass through the circular groove to rotate the installation rod, and then loosen the heating rod, and pull it out from the heating rod replacement port for replacement. The structure is simple and the quick-disassembly efficiency is high, and the structural compressive strength of the installation component is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of the installation of the fixing device of the utility model;

[0025] Figure 2 This is a schematic diagram of the installation of the screed box of the utility model;

[0026] Figure 3 It is a cross-sectional view of the fixing device of the utility model;

[0027] Figure 4 This is an axonometric drawing of the fixing device of the present invention;

[0028] Figure 5 This is an exploded view of the fixing device of the present invention;

[0029] Figure 6 This is a schematic diagram of the heating rod replacement port of the utility model. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0032] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0033] like Figures 1-6As shown, a paving machine ironing plate heating rod fixing device includes a pressing plate 1, a mounting rod 2 with a threaded hole 21, a first through hole 3 passing through the pressing plate 1, a heating rod 4 is arranged between the bottom plate 51 of the ironing plate box 5 and the pressing plate 1, a stud 6 passing through the first through hole 3 is installed on the bottom plate 51, the mounting rod 2 is threadedly connected to the stud 6, and also includes a mounting assembly 7 fixedly mounted on the upper end surface of the pressing plate 1, the mounting rod 2 includes a rod body 22, a first boss 23, a connecting portion 24, and a second boss 25 connected in sequence, the diameters of the first boss 23 and the second boss 25 are both larger than the diameters of the rod body 22 and the connecting portion 24, a second through hole 71 is provided on the mounting assembly 7, the connecting portion 24 passes through the second through hole 71 and moves up and down in the second through hole 71, the diameter of the second through hole 71 is smaller than the diameters of the first boss 23 and the second boss 25, and the side box plate 52 of the ironing plate box 5 is provided with a heating rod replacement port 521.

[0034] When the heating rod 4 needs to be compressed, in the initial state, the lower surface of the second through hole 71 on the mounting assembly 7 abuts the upper surface of the second boss 25. As the mounting rod 2 and the stud 6 continue to rotate and connect along the thread, the pressing plate 1 gradually contacts and abuts the upper surface of the heating rod 4, and the second boss 25 gradually disengages from the lower surface of the second through hole 71. The connecting portion 24 and the second through hole 71 are relatively displaced, so that the lower surface of the first boss 23 gradually abuts the upper surface of the second through hole 71, and the lower surface of the second boss 25 abuts the upper surface of the pressing plate 1. After the mounting rod 2 is installed, the heating rod 4 is fixed. When the heating rod 4 is damaged and needs to be replaced, it is only necessary to screw the mounting rod 2 in the opposite direction to drive the pressing plate 1 to disengage from the mounting rod 2. The heating rod 4 can be pulled out from the replacement port, and a new heating rod 4 can be reinserted, and then the mounting rod 2 can be twisted to make the pressure plate 1 press the heating rod 4; the pressure plate 1 and the mounting rod 2 can be set into a linkage structure by the mounting assembly 7, that is, the mounting rod 2 can drive the pressure plate 1 to move at the same time, which is not only convenient for pressing the heating rod 4, but also convenient for quick replacement of the heating rod 4. There is no need to open the upper box cover 53, and there is no need to completely remove the pressure plate 1 and the mounting rod 2 to achieve quick replacement of the heating rod 4. Moreover, since the mounting rod 2 and the pressure plate 1 have no contact with the upper box cover 53 of the ironing plate box 5, the resonance of the paver during the paving process, which causes the pressure plate 1 to loosen and the heating rod 4 to loosen, is avoided. The structure is simple and can improve work efficiency.

[0035] In order to facilitate the rapid installation of the mounting assembly 7, the mounting assembly 7 includes a side plate 72 and an upper cover plate 73 fixedly connected to each other. The side plate 72 is arranged between the upper cover plate 73 and the pressure plate 1, and is respectively arranged at both ends of the bottom surface of the upper cover plate 73. The side plate 72 is fixedly connected to the pressure plate 1. The second through hole 71 is opened on the upper cover plate 73, and the first through hole 3 and the second through hole 71 are coaxially arranged. The distance from the lower surface of the first boss 23 to the lower surface of the second boss 25 is equal to the distance from the upper surface of the upper cover plate 73 to the upper surface of the pressure plate 1.

[0036] It is only necessary to weld the side plate 72 to the pressure plate 1 and then weld the upper cover plate 73 to complete the installation of the mounting assembly 7. The structure is simple and easy to weld and install on site. In the initial state, the upper surface of the second boss 25 abuts against the lower surface of the upper cover plate 73. After the clamping is completed, the lower surface of the first boss 23 abuts against the upper surface of the upper cover plate 73, and the lower surface of the second boss 25 abuts against the upper surface of the pressure plate 1.

[0037] In order to facilitate the installation of the mounting rod 2, it also includes a first groove 731 opened along the edge of the upper cover plate 73 and a second groove 721 opened along the edge of the side plate 72. The first groove 731 is connected to the second through hole 71, and the notch of the first groove 731 is docked with the notch of the second groove 721. The groove width of the first groove 731 is greater than the diameter of the connecting part 24 and smaller than the diameters of the first boss 23 and the second boss 25. The groove width of the second groove 721 is greater than the diameter of the second boss 25.

[0038] The connecting portion 24 and the second boss 25 of the mounting rod 2 pass through the first groove 731 and the second groove 721 at the same time, so that the connecting portion 24 enters the second through hole 71, and in the initial state, the upper surface of the second boss 25 abuts against the lower surface of the upper cover plate 73, completing the installation of the mounting rod 2.

[0039] In order to guide the stud 6 and prevent the pressure plate 1 from being squeezed and deformed, a guide block 8 with a guide hole 81 is provided on the bottom surface of the pressure plate 1. The guide hole 81 is coaxially arranged with the first through hole 3, and the stud 6 passes through the guide hole 81 and the first through hole 3 at the same time.

[0040] When the heating rod 4 is finally tightened on the mounting rod 2, the second boss 25 and the pressure plate 1 are squeezed, which will cause the pressure on the pressure plate 1 at the first through hole 3 to increase, resulting in concave deformation. The guide block 8 is provided to increase the rigidity of the first through hole 3 and reduce the occurrence of extrusion deformation.

[0041] In order to limit the movement of the heating rod 4 along the width direction, limit blocks 9 are provided at both ends of the bottom surface of the pressing plate 1 along the width direction of the heating rod 4 , and the heating rod 4 is arranged between the limit blocks 9 .

[0042] In order to leave a rotation margin for the mounting rod 2, the thickness of the limit block 9 and the thickness of the guide block 8 are both smaller than the thickness of the heating rod 4. When the heating rod 4 is pressed, the limit block 9 and the guide block 8 are prevented from contacting the bottom plate 51 before the final tightening is performed, which would prevent the final tightening of the heating rod 4 from occurring, and thus prevent the heating rod 4 from being tightened. After the lower surface of the pressing plate 1 abuts the upper surface of the heating rod 4, the heating rod 4 can be limited as long as the distance between the lower surface of the limit block 9 and the bottom plate 51 is smaller than the distance between the upper surface of the heating rod 4 and the bottom plate 51.

[0043] In order to improve the compressive strength of the upper cover plate 73, the upper cover plate 73 is a bent plate, including a first straight portion 732, a second straight portion 733, and a third straight portion 734. The two ends of the first straight portion 732 are connected to the second straight portion 733 and the third straight portion 734 through the bent portions 735 respectively. The distance from the first straight portion 732 to the pressure plate 1 is greater than the distance from the second straight portion 733 and the third straight portion 734 to the pressure plate 1. The second through hole 71 is provided on the first straight portion 732, and the upper end surface of the side plate 72 matches and abuts against the bottom surface of the upper cover plate 73.

[0044] The upper cover plate 73 and the side plate 72 are designed to be combined into an arch bridge structure, so that the pressure of the first boss 23 on the first straight portion 732 during final tightening is decomposed into a downward force and two outward thrusts, thereby reducing the degree of extrusion deformation of the first straight portion 732 where the second through hole 71 is located, reducing the pressure of the original first boss 23 on the upper cover plate 73 of the straight plate structure, and improving the compressive strength of the upper cover plate 73.

[0045] In order to reduce the weight of the pressing plate 1 , a weight-reducing through groove 101 is provided on the pressing plate 1 .

[0046] In order to facilitate the quick removal and replacement of the heating rod 4, the heating rod replacement port 521 is arranged between the side box plate 52 and the bottom plate 51 of the ironing plate box 5 in the same direction as the width direction of the heating rod 4, and the height of the heating rod replacement port 521 is greater than the thickness of the heating rod 4.

[0047] To facilitate rotation of the mounting rod 2 without removing the upper cover 53, a circular groove 531 is provided on the upper cover 53 of the screed box 5. The groove 531 is coaxial with the mounting rod 2. The upper portion of the shaft 22 of the mounting rod 2 has a hexagonal bolt head, which can be screwed into the mounting rod 2 by passing a sleeve through the circular groove 531. A rubber plug can be provided in the circular groove 531 to prevent foreign matter from entering the box.

[0048] In order to facilitate welding of the pressing plate 1 and the limiting block 9 , a welding groove 102 is provided along the edge of the pressing plate 1 at the connection between the pressing plate 1 and the limiting block 9 .

[0049] In order to avoid interference with the mounting studs 532 of the upper box cover 53 , a mounting groove 103 is provided on the edge of the plate surface of the pressure plate 1 on the same side as the limit block 9 , and the mounting groove 103 passes through both the pressure plate 1 and the limit block 9 .

[0050] In this embodiment, at least two sets of mounting rods 2 and mounting assemblies 7 are provided on the same pressing plate 1. When tightening the heating rod 4, at least two sets are provided on the pressing plate 1 to ensure that the heating rod 4 is tightly attached to the bottom plate 51 so that the temperature on the bottom plate 51 is evenly distributed.

[0051] To facilitate installation of the heating rod head 4, a mounting slot 533 is formed through the edge of the upper cover 53 of the screed box 5, near the heating rod replacement port 521. The side panel 52 of the screed box 5 is provided with a rod head mounting slot 522, which is vertically connected to the mounting slot 533 and is in communication with the heating rod replacement port 521. After the heating rod 4 is installed, the rod head simultaneously enters the rod head mounting slot 522 and the mounting slot 533, forming a single piece with the screed box 5. This prevents the rod head from protruding from the box and causing damage, and also facilitates installation and replacement of the heating rod 4.

[0052] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0053] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for fixing a heating rod of a paving machine ironing plate, comprising a pressing plate (1), a mounting rod (2) with a threaded hole (21), and a first through hole (3) penetrating the pressing plate (1); a heating rod (4) is arranged between a bottom plate (51) of a screed box (5) and the pressing plate (1); a stud (6) penetrating the first through hole (3) is mounted on the bottom plate (51); the mounting rod (2) is threadedly connected to the stud (6); and the device is characterized in that: The invention also includes a mounting assembly (7) fixedly mounted on the upper end surface of the pressure plate (1), wherein the mounting rod (2) includes a rod body (22), a first boss (23), a connecting portion (24), and a second boss (25) connected in sequence, wherein the diameters of the first boss (23) and the second boss (25) are both larger than the diameters of the rod body (22) and the connecting portion (24), and the mounting assembly (7) is provided with a second through hole (71), wherein the connecting portion (24) passes through the second through hole (71) and moves up and down in the second through hole (71), wherein the diameter of the second through hole (71) is smaller than the diameters of the first boss (23) and the second boss (25), and the side box plate (52) of the screed box body (5) is provided with a heating rod replacement port (521).

2. The device for fixing the heating rod of the paving machine screed plate according to claim 1, characterized in that: The mounting assembly (7) comprises a side plate (72) and an upper cover plate (73) fixedly connected to each other, the side plate (72) being arranged between the upper cover plate (73) and the pressure plate (1), and respectively arranged at both ends of the bottom surface of the upper cover plate (73), the side plate (72) being fixedly connected to the pressure plate (1), the second through hole (71) being opened on the upper cover plate (73), and the first through hole (3) and the second through hole (71) being coaxially arranged, and the distance from the lower surface of the first boss (23) to the lower surface of the second boss (25) being equal to the distance from the upper surface of the upper cover plate (73) to the upper surface of the pressure plate (1).

3. The device for fixing the heating rod of the paving machine screed plate according to claim 2, characterized in that: The first groove (731) is formed along the edge of the upper cover plate (73), and the second groove (721) is formed along the edge of the side plate (72). The first groove (731) is connected to the second through hole (71). The notch of the first groove (731) is connected to the notch of the second groove (721). The groove width of the first groove (731) is greater than the diameter of the connecting portion (24) and smaller than the diameters of the first boss (23) and the second boss (25). The groove width of the second groove (721) is greater than the diameter of the second boss (25).

4. The device for fixing a heating rod of a paving machine screed plate according to claim 1, characterized in that: The bottom surface of the pressure plate (1) is provided with a guide block (8) with a guide hole (81), the guide hole (81) is coaxially arranged with the first through hole (3), and the stud (6) passes through both the guide hole (81) and the first through hole (3).

5. The device for fixing the heating rod of the paving machine screed plate according to claim 4, characterized in that: Limit blocks (9) are provided on both ends of the bottom surface of the pressing plate (1) along the width direction of the heating rod (4), and the heating rod (4) is arranged between the limit blocks (9).

6. The device for fixing a heating rod of a paving machine screed plate according to claim 5, characterized in that: The thickness of the limiting block (9) and the thickness of the guide block (8) are both smaller than the thickness of the heating rod (4).

7. The device for fixing heating rods for paving machine screed plates according to claim 2, characterized in that: The upper cover plate (73) is a bent plate, comprising a first straight portion (732), a second straight portion (733), and a third straight portion (734); the two ends of the first straight portion (732) are connected to the second straight portion (733) and the third straight portion (734) via the bent portions (735), respectively; the distance from the first straight portion (732) to the pressing plate (1) is greater than the distance from the second straight portion (733) and the third straight portion (734) to the pressing plate (1); the second through hole (71) is provided on the first straight portion (732); and the upper end surface of the side plate (72) is matched and abutted against the bottom surface of the upper cover plate (73).

8. The device for fixing a heating rod of a paving machine screed plate according to claim 1, characterized in that: The pressing plate (1) is provided with a weight-reducing through groove (101).

9. The device for fixing a heating rod of a paving machine screed plate according to claim 1, characterized in that: The heating rod replacement opening (521) is arranged between the side box plate (52) and the bottom plate (51) of the screed box (5) in the same direction as the width direction of the heating rod (4), and the height of the heating rod replacement opening (521) is greater than the thickness of the heating rod (4).

10. The device for fixing heating rods for paving machine screed plates according to claim 1, characterized in that: A circular groove (531) is provided on the upper box cover (53) of the screed box body (5), and the circular groove (531) is coaxially arranged with the mounting rod (2).

Images