A chassis adjustment device for a wheeled road milling machine

Abstract

The present invention discloses a chassis adjustment device for a wheeled road milling machine, which includes a vehicle frame, a milling drum assembly and a chassis assembly. The milling drum assembly and the chassis assembly are respectively installed on the vehicle frame; the milling drum assembly is connected with a lateral adjustment component, and the lateral adjustment component drives the milling drum assembly to move left and right relative to the vehicle frame in the lateral direction. Beneficial effects: By adjusting the position of the milling drum assembly on the chassis, the present invention can avoid road obstacles during the operation process, without having to reposition the milling position by retransferring the site, thus improving the operation efficiency; at the same time, the positions of two independently controlled driving rear wheels can also be adjusted to achieve a symmetrical arrangement of the four tires of the tire-type milling machine during the transfer and transportation process, improving the stability of the whole machine.

Description

Technical Field

[0001] The present invention relates to a component of a wheeled road milling machine, and particularly to a chassis adjustment device of a wheeled road milling machine, belonging to the technical field of construction machinery. Background Art

[0002] A road milling machine is a special road maintenance equipment belonging to construction machinery. According to the driving form, it can be divided into a tire-type road milling machine and a crawler-type road milling machine. The tire-type road milling machine is more flexible than the crawler-type road milling machine and is mainly applicable to the construction of municipal roads. In order to endow the tire-type road milling machine with more applicable working conditions, the two driving front wheels of the road milling machines on the market are uniformly controlled by the front axle and their heights are not adjustable; the two driving rear wheels are independently controlled and their heights are adjustable. It should be particularly emphasized that the driving right rear wheel can rotate 180° around a fixed axis, and the milling machine after rotation can perform edge milling.

[0003] In order to meet the working condition of the milling machine to perform edge milling, the four tires of the tire-type milling machine adopt an asymmetric layout, and this asymmetric layout also brings great inconvenience to the tire-type milling machine. Especially when the tire-type milling machine climbs onto the boarding vehicle by itself, there is a great risk of tipping over.

[0004] In addition, the milling drums of most tire-type road milling machines on the market are fixedly connected to the frame, and the milling drums cannot move horizontally (the longitudinal direction is the forward direction of the vehicle head). In municipal work, there are drainage fences at the road edge. In this case, the milling machine needs to reposition the milling position after relocating, which seriously affects the operation efficiency. Summary of the Invention

[0005] Object of the Invention: The object of the present invention is to solve the problems existing in the prior art and provide a chassis adjustment device for a wheeled road milling machine. By adjusting the position of the milling drum assembly on the chassis, the present invention can avoid road obstacles during the operation process, without repositioning the milling position after relocating, thus improving the operation efficiency; at the same time, it can also adjust the positions of the two independently controlled driving rear wheels to achieve a symmetric layout of the four tires of the tire-type milling machine during the transportation process, improving the overall stability of the machine.

[0006] Technical Solution: A chassis adjustment device for a wheeled road milling machine includes a frame, a milling drum assembly, and a chassis assembly. The milling drum assembly and the chassis assembly are respectively installed on the frame; the milling drum assembly is connected with a horizontal adjustment component, and the horizontal adjustment component drives the milling drum assembly to move left and right relative to the frame in the horizontal direction.

[0007] In the present invention, a milling drum assembly is driven by a lateral adjustment component to move left and right relative to a vehicle frame in the lateral direction, so that road surface obstacles can be avoided during the milling operation, and there is no need to reposition the milling position by retransferring the site, thereby improving the operation efficiency.

[0008] Preferably, in order to enable the lateral adjustment component to drive the milling drum assembly to move left and right relative to the vehicle frame in the lateral direction, the lateral adjustment component includes a lateral adjustment oil cylinder and a sliding component. The milling drum assembly is movably connected to the vehicle frame in the lateral direction through the sliding component, and the lateral adjustment oil cylinder pushes the milling drum assembly to move left and right relative to the vehicle frame in the lateral direction.

[0009] The present invention is driven by a hydraulic oil cylinder and can also be driven by an electric lead screw.

[0010] Preferably, in order to ensure that the milling drum assembly is movably connected to the vehicle frame laterally and ensure the reliability of the connection, the sliding component includes a connecting sleeve, a connecting shaft and a connecting block. The connecting sleeve is fixedly connected to the milling drum assembly. The connecting shaft is fixedly connected to the vehicle frame in the lateral direction through the connecting blocks at both ends. The connecting sleeve is sleeved on the connecting shaft, and the lateral adjustment oil cylinder pushes the milling drum assembly to move along the connecting shaft.

[0011] In addition to the above solutions, the present invention can also adopt a solution in which the connecting sleeve is connected to the vehicle frame, the connecting shaft is connected to the milling drum assembly, and the connecting sleeve and the connecting shaft are connected in a sleeved manner.

[0012] Preferably, in order to ensure that the position of the milling drum assembly and the vehicle frame is relatively stable and fixed during the normal operation of the milling machine, limiting plates are respectively arranged on both sides of the milling drum assembly. The limiting plates are respectively detachably installed on the outer side of the milling drum assembly, and the connecting blocks at both ends of the connecting shaft are located between the limiting plates on both sides of the milling drum assembly.

[0013] The connecting blocks at both ends of the connecting shaft are located between the limiting plates on both sides of the milling drum assembly. Since the limiting plates are fixedly connected to the milling drum assembly and the connecting sleeve is fixedly connected to the milling drum assembly; therefore, the positions of the connecting sleeve and the connecting shaft are relatively fixed, ensuring the relative stability and fixation of the position between the milling drum assembly and the vehicle frame.

[0014] Preferably, in order to improve the stability of the whole machine, the chassis assembly includes a left lifting leg assembly and a right lifting leg assembly. The left lifting leg assembly and the right lifting leg assembly are respectively installed on both sides of the vehicle frame. A left leg lateral adjustment component is provided between the left lifting leg assembly and the vehicle frame, and the right lifting leg assembly is hinged to the vehicle frame.

[0015] When the whole machine is transferred onto the flatbed truck, the left outrigger horizontal adjustment assembly is used to extend the left lifting outrigger assembly outward from the frame. The left lifting outrigger assembly and the right lifting outrigger assembly are symmetrically distributed left and right relative to the frame, improving the stability of the whole machine; the right lifting outrigger assembly is hinged to the frame and can rotate 180° around the fixed axis, so that the milling drum assembly can perform edge milling, improving the performance of the whole machine.

[0016] Preferred option, in order to enable the left lifting outrigger assembly to move outward relative to the frame and ensure a reliable connection between the left lifting outrigger assembly and the frame, the left outrigger horizontal adjustment assembly includes a outrigger adjustment plate and a frame adjustment plate. The outrigger adjustment plate and the frame adjustment plate are respectively provided with connection hole groups with at least two rows in the vertical direction and at least three columns in the horizontal direction. The hole distances between adjacent two rows and adjacent two columns on the outrigger adjustment plate and the frame adjustment plate are equal. The outrigger adjustment plate and the frame adjustment plate are connected by fastening bolts passing through the connection holes.

[0017] When the outrigger adjustment plate and the frame adjustment plate are aligned, it is the initial position of the left lifting outrigger assembly. When it is necessary to move the left lifting outrigger assembly outward, remove the fastening bolts, move the left lifting outrigger assembly by an integer multiple of the hole distance between adjacent two columns of the connection hole group. There will be partial overlap of the connection hole groups on the outrigger adjustment plate and the frame adjustment plate, and the outrigger adjustment plate and the frame adjustment plate are fixed together by fastening bolts passing through the overlapping connection hole groups.

[0018] Preferred option, in order to ensure that the left lifting outrigger assembly can still be effectively connected to the frame during the side shift process, "L" - shaped bent plates are respectively arranged above and below the frame adjustment plate. The bent parts of the "L" - shaped bent plates are arranged oppositely to form a chute in the horizontal direction, and the outrigger adjustment plate moves in the chute.

[0019] Preferred option, in order to improve the reliability of the connection between the left lifting outrigger assembly and the frame during the side shift process, at least two identical long - shaped holes are respectively arranged in the same horizontal positions on the outrigger adjustment plate and the frame adjustment plate. At least two positioning pins are installed in each long - shaped hole, and the positioning pins respectively penetrate the long - shaped holes on the outrigger adjustment plate and the frame adjustment plate.

[0020] Preferred option, in order to reduce the difficulty of side shift adjustment of the left lifting outrigger assembly, both ends of the horizontal adjustment oil cylinder are respectively connected to the left lifting outrigger assembly and the milling drum assembly.

[0021] When it is necessary to extend the left lifting leg assembly outward from the vehicle frame, remove the fastening bolts, install the limit plate, and extend the lateral adjustment cylinder. Since one end of the lateral adjustment cylinder is connected to the milling drum assembly, at this time, under the action of the limit plate, the milling drum assembly is fixedly connected to the vehicle frame, and the left lifting leg assembly is movably connected to the vehicle frame. Under the action of the lateral adjustment cylinder, the left lifting leg assembly moves outward from the vehicle frame. After the movement is completed, reconnect the left lifting leg assembly to the vehicle frame through the fastening bolts. When the left lifting leg assembly needs to be restored to the initial state, the operation method is the same as above, and the lateral adjustment cylinder contracts.

[0022] Beneficial effects: By adjusting the position of the milling drum assembly on the chassis, the present invention can avoid road surface obstacles during operation, eliminating the need to relocate the milling position by repositioning the work site, thus improving the operation efficiency. At the same time, it can also adjust the positions of two independently controlled drive rear wheels to achieve a symmetrical arrangement of the four tires of the wheeled milling machine during the transfer transportation process, enhancing the overall stability of the machine. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0024] Figure 1 It is a schematic structural diagram of the whole machine of the present invention;

[0025] Figure 2 It is an exploded view of the installation structure of the present invention;

[0026] Figure 3 It is a simplified structural decomposition diagram of the present invention;

[0027] Figure 4 It is a partial enlarged view of the left leg lateral adjustment assembly of the present invention;

[0028] Figure 5 It is a schematic structural diagram when the sliding assembly is connected to the milling drum assembly of the present invention. Detailed Embodiments

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0031] In the present invention, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0032] As Figure 1 and 2 As shown, a chassis adjustment device for a wheeled road milling machine includes a vehicle frame 1, a milling drum assembly 2 and a chassis assembly 3. The milling drum assembly 2 and the chassis assembly 3 are respectively mounted on the vehicle frame 1; the milling drum assembly 2 is connected with a lateral adjustment assembly 4, and the lateral adjustment assembly 4 drives the milling drum assembly 2 to move left and right relative to the vehicle frame 1 in the lateral direction.

[0033] In the present invention, by driving the milling drum assembly 5 to move left and right relative to the vehicle frame 1 in the lateral direction through the lateral adjustment assembly 4, it is possible to avoid road obstacles during the milling operation, without the need to reposition the milling position by retransferring the site, thereby improving the operation efficiency.

[0034] In order to enable the lateral adjustment assembly 4 to drive the milling drum assembly 2 to move left and right relative to the vehicle frame 1 in the lateral direction, the lateral adjustment assembly 4 includes a lateral adjustment oil cylinder 41 and a sliding assembly 42. The milling drum assembly 2 is movably connected to the vehicle frame 1 in the lateral direction through the sliding assembly 42, and the lateral adjustment oil cylinder 41 pushes the milling drum assembly 2 to move left and right relative to the vehicle frame 1 in the lateral direction.

[0035] As Figure 2 and 5As shown in the figure, in order to ensure that the milling drum assembly 2 is horizontally movably connected to the vehicle frame 1 and to ensure the reliability of the connection, the sliding assembly 42 includes a connecting sleeve 421, a connecting shaft 422 and a connecting block 423. The connecting sleeve 421 is fixedly connected to the milling drum assembly 2. The connecting shaft 422 is fixedly connected to the vehicle frame 1 in the horizontal direction through the connecting blocks 423 at both ends. The connecting sleeve 421 is sleeved on the connecting shaft 422. The horizontal adjustment oil cylinder 41 pushes the milling drum assembly 2 to move along the connecting shaft 422.

[0036] As Figure 2 shown in the figure, in order to ensure that the positions of the milling drum assembly 2 and the vehicle frame 1 are relatively stable and fixed during the normal operation of the milling machine, limit plates 43 are respectively provided on both sides of the milling drum assembly 2. The limit plates 43 are respectively detachably installed on the outside of the milling drum assembly 2. The connecting blocks 423 at both ends of the connecting shaft 422 are located between the limit plates 43 on both sides of the milling drum assembly 2.

[0037] The connecting blocks 423 at both ends of the connecting shaft 422 are located between the limit plates 43 on both sides of the milling drum assembly 2. Since the limit plates 43 are fixedly connected to the milling drum assembly 2 and the connecting sleeve 421 is fixedly connected to the milling drum assembly 2; therefore, the positions of the connecting sleeve 421 and the connecting shaft 422 are relatively fixed, ensuring the relative stability and fixation of the positions between the milling drum assembly 2 and the vehicle frame 1.

[0038] As Figure 2 and 3 shown in the figure, in order to improve the stability of the whole machine, the chassis assembly 3 includes a left lifting leg assembly 31 and a right lifting leg assembly 32. The left lifting leg assembly 31 and the right lifting leg assembly 32 are respectively installed on both sides of the vehicle frame 1. A left leg horizontal adjustment assembly 33 is provided between the left lifting leg assembly 31 and the vehicle frame 1. The right lifting leg assembly 32 is hinged to the vehicle frame 1.

[0039] When the whole machine is transferred onto the flatbed truck, the left lifting leg assembly 31 is extended outward from the vehicle frame 1 through the left leg horizontal adjustment assembly 33. The left lifting leg assembly 31 and the right lifting leg assembly 32 are symmetrically distributed left and right relative to the vehicle frame 1, improving the stability of the whole machine; the right lifting leg assembly 32 is hinged to the vehicle frame 1 and can rotate 180° around a fixed axis, thereby enabling the milling drum assembly 2 to perform edge milling, improving the performance of the whole machine.

[0040] As Figure 2 、 3As shown in FIGS. 3 and 4, in order to enable the left lifting leg assembly 31 to move laterally relative to the vehicle frame 1 and ensure a reliable connection between the left lifting leg assembly 31 and the vehicle frame 1, the left leg lateral adjustment assembly 33 includes a leg adjustment plate 331 and a vehicle frame adjustment plate 332. The leg adjustment plate 331 and the vehicle frame adjustment plate 332 are respectively provided with connection hole groups having at least two rows in the vertical direction and at least three columns in the horizontal direction. The hole pitches between adjacent two rows and adjacent two columns on the leg adjustment plate 331 and the vehicle frame adjustment plate 332 are equal. The leg adjustment plate 331 and the vehicle frame adjustment plate 332 are connected by fastening bolts passing through the connection holes.

[0041] When the leg adjustment plate 331 and the vehicle frame adjustment plate 332 are aligned, it is the initial position of the left lifting leg assembly 31. When it is necessary to move the left lifting leg assembly 31 laterally outward, the fastening bolts are removed, and the left lifting leg assembly 31 is moved by an integer multiple of the hole pitch between adjacent two columns of the connection hole group. There will be partial overlap of the connection hole groups on the leg adjustment plate 331 and the vehicle frame adjustment plate 332, and the leg adjustment plate 331 and the vehicle frame adjustment plate 332 are fixed together by fastening bolts passing through the overlapping connection hole groups.

[0042] In order to ensure that the left lifting leg assembly 31 can still be effectively connected to the vehicle frame 1 during the lateral movement process, "L"-shaped bent plates 333 are respectively provided above and below the vehicle frame adjustment plate 332. The bent parts of the "L"-shaped bent plates 333 are oppositely arranged to form a chute in the horizontal direction, and the leg adjustment plate 331 moves in the chute.

[0043] In order to improve the reliability of the connection between the left lifting leg assembly 31 and the vehicle frame 1 during the lateral movement process, at least two identical long holes 334 are respectively provided in the horizontal direction at the same positions on the leg adjustment plate 331 and the vehicle frame adjustment plate 332. At least two positioning pins 335 are installed in each long hole 334, and the positioning pins 335 respectively penetrate through the long holes 334 on the leg adjustment plate 331 and the vehicle frame adjustment plate 332.

[0044] As Figure 2 shown, in order to reduce the difficulty of lateral movement adjustment of the left lifting leg assembly 31, both ends of the lateral adjustment oil cylinder 41 are respectively connected to the left lifting leg assembly 31 and the milling drum assembly 2.

[0045] When it is necessary to extend the left lifting leg assembly 31 outward from the vehicle frame 1, remove the fastening bolts, install the limit plate 43, extend the transverse adjustment oil cylinder 41. Since one end of the transverse adjustment oil cylinder 41 is connected to the milling drum assembly 2, at this time, under the action of the limit plate 43, the milling drum assembly 2 is fixedly connected to the vehicle frame 1, and the left lifting leg assembly 31 is movably connected to the vehicle frame 1. Under the action of the transverse adjustment oil cylinder 41, the left lifting leg assembly 31 moves outward from the vehicle frame 1. After the movement is completed, reconnect the left lifting leg assembly 31 to the vehicle frame 1 through the fastening bolts. When the left lifting leg assembly 31 needs to return to the initial state, the operation method is the same, and the transverse adjustment oil cylinder 41 contracts.

[0046] By adjusting the position of the milling drum assembly 1 on the chassis 3, the present invention can avoid road surface obstacles during the operation process, without the need to reposition the milling position by retransferring the site, thus improving the operation efficiency. At the same time, the positions of two independently controlled drive rear wheels can also be adjusted to achieve a symmetrical arrangement of the four tires of the wheeled milling machine during the transfer transportation process, improving the overall stability of the machine.

[0047] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and reference can be made to the description of the method part for related parts.

[0048] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A chassis adjustment device for a wheeled road milling machine, comprising a vehicle frame (1), a milling drum assembly (2) and a chassis assembly (3), wherein the milling drum assembly (2) and the chassis assembly (3) are respectively installed on the vehicle frame (1); characterized in that: The milling drum assembly (2) is connected with a lateral adjustment assembly (4), and the lateral adjustment assembly (4) drives the milling drum assembly (2) to move left and right relative to the vehicle frame (1) in the lateral direction; The chassis assembly (3) includes a left lifting leg assembly (31) and a right lifting leg assembly (32). The left lifting leg assembly (31) and the right lifting leg assembly (32) are respectively installed on both sides of the vehicle frame (1). A left leg lateral adjustment assembly (33) is provided between the left lifting leg assembly (31) and the vehicle frame (1), and the right lifting leg assembly (32) is hinged to the vehicle frame (1).

2. The chassis adjustment device of the wheeled road milling machine according to claim 1, wherein: The lateral adjustment assembly (4) includes a lateral adjustment oil cylinder (41) and a sliding assembly (42). The milling drum assembly (2) is movably connected to the vehicle frame (1) in the lateral direction through the sliding assembly (42), and the lateral adjustment oil cylinder (41) pushes the milling drum assembly (2) to move left and right relative to the vehicle frame (1) in the lateral direction.

3. The chassis adjustment device of the wheeled road milling machine according to claim 2, characterized in that: The sliding assembly (42) includes a connecting sleeve (421), a connecting shaft (422) and a connecting block (423). The connecting sleeve (421) is fixedly connected to the milling drum assembly (2). The connecting shaft (422) is fixedly connected to the vehicle frame (1) in the lateral direction through the connecting blocks (423) at both ends. The connecting sleeve (421) is sleeved on the connecting shaft (422), and the lateral adjustment oil cylinder (41) pushes the milling drum assembly (2) to move along the connecting shaft (422).

4. The chassis adjustment device of the wheeled road milling machine according to claim 3, characterized in that: Limit plates (43) are respectively arranged on both sides of the milling drum assembly (2). The limit plates (43) are respectively detachably installed on the outer side of the milling drum assembly (2), and the connecting blocks (423) at both ends of the connecting shaft (422) are located between the limit plates (43) on both sides of the milling drum assembly (2).

5. The chassis adjustment device of the wheeled road milling machine according to claim 1, characterized in that: The left leg lateral adjustment assembly (33) includes a leg adjustment plate (331) and a vehicle frame adjustment plate (332). The leg adjustment plate (331) and the vehicle frame adjustment plate (332) are respectively provided with connection hole groups with at least two rows in the vertical direction and at least three columns in the horizontal direction. The hole distances between adjacent rows and adjacent columns on the leg adjustment plate (331) and the vehicle frame adjustment plate (332) are equal. The leg adjustment plate (331) and the vehicle frame adjustment plate (332) are connected through fastening bolts passing through the connection holes.

6. The chassis adjusting device of the wheeled road milling machine according to claim 5, characterized in that: "L”-shaped bent plates (333) are respectively arranged above and below the vehicle frame adjustment plate (332). The bent parts of the "L”-shaped bent plates (333) are oppositely arranged to form a chute in the horizontal direction, and the leg adjustment plate (331) moves in the chute.

7. The chassis adjustment device of the wheeled road milling machine according to claim 5 or 6, characterized in that: At least two identical long holes (334) are respectively arranged in the horizontal direction at the same positions on the leg adjustment plate (331) and the vehicle frame adjustment plate (332). At least two positioning pin bolts (335) are installed in each long hole (334), and the positioning pin bolts (335) respectively penetrate through the long holes (334) on the leg adjustment plate (331) and the vehicle frame adjustment plate (332).

8. The chassis adjusting device of the wheeled road milling machine according to claim 2, characterized in that: Both ends of the lateral adjustment oil cylinder (41) are respectively connected to the left lifting leg assembly (31) and the milling drum assembly (2).

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