Road marking machine walking mechanism

Abstract

The invention discloses a walking mechanism of a road marking machine. The driving wheel is arranged on the front portion of the chassis, the transmission mechanism is used for driving the driving wheel to rotate, the installation frame is installed on the rear portion of the chassis through a vertical rotating shaft, the universal wheel is arranged on the installation frame, and the limiting mechanism is used for limiting rotation of the universal wheel. The limiting mechanism comprises a limiting groove formed in the mounting frame and a limiting pin arranged above the limiting groove, and the top of the limiting pin is connected with a shifting rod. An adjusting plate with an adjusting face with the height continuously changing at the top is fixed to the chassis, and the shifting rod is erected on the adjusting face and can drive the limiting pin to move up and down through interaction with the adjusting face so as to be clamped into or leave the limiting groove. The device has the advantages that the limiting pins are driven to ascend and descend through the action relation between the shifting rods and the adjusting faces, the universal wheels are mechanically limited in the mode that the limiting pins are clamped into the limiting grooves, therefore, linear walking of the marking machine is achieved, the structure is simple, switching is flexible and convenient, and the maintenance cost is low.

Description

TECHNICAL FIELD

[0001] The present application relates to a road marking machine, in particular to a walking mechanism of a road marking machine. BACKGROUND

[0002] As a road construction equipment, the flexibility and stability of the walking mechanism of the road marking machine will directly affect the moving precision and marking quality. The traditional marking machine chassis is usually a rigid frame welded structure, which has high strength but large weight and insufficient steering flexibility. During the marking operation, especially when on a curve or complex road surface, the chassis needs to meet the requirements of steering flexibility and straight walking retention, otherwise the marking track may deviate, affecting the construction quality. In some existing improved schemes, the flexibility is improved by increasing the steering mechanism or adjusting the wheel track, such as using a hydraulic steering system or a multi-motor independent driving steering. Although the flexibility can be improved, the structure is relatively complex and the failure rate is high, which not only increases the equipment procurement cost but also increases the difficulty of later maintenance, thus being not conducive to large-scale popularization and use. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a road marking machine walking mechanism with simple structure, flexible steering and good straight walking retention.

[0004] In order to solve the above technical problems, the road marking machine walking mechanism of the present application comprises a chassis, a driving wheel arranged at the front of the chassis, a transmission mechanism for driving the driving wheel to rotate, a mounting frame installed at the rear of the chassis through a vertical rotating shaft, a universal wheel arranged on the mounting frame, and a limiting mechanism for limiting the rotation of the universal wheel; the limiting mechanism comprises a limiting slot opened on the mounting frame and a limiting pin arranged above the limiting slot and having a top connected with a lever; an adjusting plate with a top adjusting surface with continuously changing height is fixed on the chassis, the lever is arranged on the adjusting surface and can drive the limiting pin to move up and down by interacting with the adjusting surface, so as to be clamped into or out of the limiting slot.

[0005] The mounting frame comprises a mounting disc and two universal wheel plates symmetrically arranged below the mounting disc, and the rotating shaft is fixed above the mounting disc; the limiting slot is opened on the mounting disc; the universal wheel is arranged between the two universal wheel plates.

[0006] A through hole is opened on the chassis for the rotating shaft to pass through, and a spacer sleeve is arranged between the rotating shaft and the chassis; after the rotating shaft passes through the through hole, a pressure pad is sleeved at the end of the rotating shaft and a lock nut is arranged for fastening.

[0007] The lower conical roller bearing, the shaft sleeve and the upper conical roller bearing are sequentially sleeved on the rotating shaft between the mounting disc and the spacer sleeve, and the shaft sleeve is fixedly connected with the bottom disc.

[0008] The universal wheel plate is provided with a through slot and a universal wheel shaft arranged in the through slot, the universal wheel is arranged on the universal wheel shaft through a bearing, and the universal wheel shaft is fastened to the universal wheel plate through lock nuts at both ends.

[0009] The limiting sleeve is fixed on the bottom disc, the limiting pin is arranged in the limiting sleeve, and a blind hole nut is arranged on the top end of the limiting pin; a compression spring is arranged between the limiting pin and the limiting sleeve to reset the limiting pin after movement; and the push rod is fixed on the side surface of the blind hole nut.

[0010] The adjusting surface comprises an adjusting inclined surface and an adjusting flat surface; when the action point of the push rod and the adjusting surface is located at the bottom of the adjusting inclined surface, the limiting pin is clamped into the limiting slot; and when the action point of the push rod and the adjusting surface is located on the adjusting flat surface, the limiting pin is separated from the limiting slot.

[0011] Two drive wheel plates are symmetrically arranged below the rear part of the bottom disc, the drive wheel plates are provided with through holes and drive shafts penetrating through the through holes, and the drive wheels are arranged on both sides of the drive shafts.

[0012] The transmission mechanism comprises a gear set arranged on the bottom disc for transmitting driving force and a driving sprocket arranged at the end of the gear set; the driving sprocket is fixed on the hub cover of the drive wheel towards the inner side; and chain transmission is formed between the driving sprocket and the driven sprocket.

[0013] The bottom disc is made of aluminum alloy profiles.

[0014] The present application has the following advantages: (1) the push rod and the adjusting surface are interacted to drive the limiting pin to be lifted and lowered, the universal wheel is mechanically limited in the mode that the limiting pin is clamped into the limiting slot, the straight-line walking of the line marking machine is realized, the straight-line locking and the universal movement can be switched only by pushing the push rod, the structure is simple, the switching is flexible and convenient, and the maintenance cost is low; (2) the universal wheel is used as the steering mechanism, compared with the hydraulic steering and the motor-driven steering, the maintenance difficulty is lower, two conical roller bearings are arranged in the shaft sleeve of the rotating shaft of the universal wheel, the universal wheel can still be stably rotated under the condition that the universal wheel bears a large axial load at the rotating shaft, and the reliability of the walking mechanism is improved; (3) the bottom disc is made of aluminum alloy profiles, the self-weight is low, the bottom disc is light and reliable, and the steering flexibility can be further improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a top perspective view of the present application; Figure 2 is a front view of the limiting mechanism of the present application; Figure 3 is a right view of the limiting mechanism of the present application; Figure 4 is Figure 2 is a sectional view along A-A of Figure 5 is a bottom perspective view of the present application. DETAILED DESCRIPTION

[0016] The road marking machine walking mechanism of the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0017] As shown in the drawings, the road marking machine walking mechanism of the present application comprises a chassis 1 spliced from aluminum alloy profiles, two drive wheel plates 25 are symmetrically fixed to the lower front part of the chassis 1, a through hole is formed in the drive wheel plate 25 and a drive wheel shaft 26 passes through the through hole, drive wheels 6 are installed on both sides of the drive wheel shaft 26, a gear set 27 connected with a driving mechanism (not shown in the drawings) is arranged in the middle of the chassis 1, a drive sprocket 28 is coaxially connected to the end of the gear set 27, a driven sprocket 30 fixed to the inner hub cover 29 of the drive wheel 6 is formed between the drive sprocket 28 and the driven sprocket 30 to form a chain transmission, and the transmission mechanism 7 composed of the gear set 27, the drive sprocket 28 and the driven sprocket 30 can transmit power from the driving mechanism to the drive wheel 6 to drive it to rotate.

[0018] A mounting rack 3 is fixed to the lower rear part of the chassis 1, the mounting rack 3 comprises two universal wheel plates 13 symmetrically fixed to the lower part and a mounting disc 12 with a rotating shaft 14 welded to the upper part, an inclined through slot is formed in the universal wheel plate 13, a universal wheel shaft 15 is arranged in the through slot, a universal wheel 4 is arranged in the middle of the universal wheel shaft 15 through a bearing, and the universal wheel shaft 15 is fastened to the universal wheel plate 13 through a lock nut (not shown in the drawings) after being mounted in the through slot. A shaft sleeve 19 with a stepped surface formed in the inner part is sleeved on the rotating shaft 14, the shaft sleeve 19 is fixedly connected to the chassis 1 through a bolt, an upper conical roller bearing 20 and a lower conical roller bearing 18 are arranged on the stepped surface of the shaft sleeve 19 respectively, a spacer sleeve 16 is sleeved on the top of the rotating shaft 14 after the shaft sleeve 19 is mounted on the rotating shaft 14, then the spacer sleeve 16 passes through the through hole formed in the chassis 1, and the spacer sleeve 16 is fastened through a lock nut (not shown in the drawings) after a pressing pad 17 is sleeved on the top of the spacer sleeve 16, finally the shaft sleeve 19 is fixed to the chassis 1 through a bolt to complete the installation of the universal wheel 4, at this time the universal wheel 4 can rotate with the rotation of the rotating shaft 4.

[0019] The installation disc 12 is provided with a limiting slot 2, when the universal wheel 4 and the driving wheel 6 are in the same direction, the bottom disc 1 is provided with a through hole above the limiting slot 2 and a limiting sleeve 21 with an open bottom is fixed in the through hole, the limiting sleeve 21 is provided with a through hole with a smaller diameter at the top, a limiting pin 9 with a smaller diameter at the top and a larger diameter at the bottom is arranged in the through hole, the limiting pin 9 is arranged in the limiting sleeve 21 from the bottom and the top of the limiting pin 9 extends out of the through hole at the top of the limiting sleeve 21 and is screwed with a blind hole nut 22, the bottom of the limiting pin 9 extends out of the limiting sleeve 21.

[0020] The bottom disc 1 is provided with an L-shaped adjusting plate 8 beside the limiting sleeve 21 and is fixed by a bolt, the adjusting plate 8 is provided with an adjusting surface with a continuously changing height, specifically, an adjusting inclined surface 23 and an adjusting flat surface 24, one end of the adjusting inclined surface 23 is at a low point and one end of the adjusting flat surface 24 is at a high point, the blind hole nut 22 is provided with a lever 10 on the side surface, the lever 10 is arranged on the adjusting surface, when the action point of the lever 10 and the adjusting surface moves to the high point of the adjusting flat surface 24, the lever 10 drives the limiting pin 9 to move upwards and the spring in the limiting sleeve 21 is compressed, at this time, the universal wheel 4 can rotate freely, when it is needed to make the line marking machine move straightly, the universal wheel 4 is adjusted to be in the same direction with the driving wheel 6, the limiting slot 2 on the installation disc 12 is below the limiting pin 9, then the lever 10 is pulled to move away from the adjusting flat surface 24 and enter the adjusting inclined surface 23, the lever 10 automatically slides along the inclined surface under the action of the compression spring until the action point of the lever 10 and the adjusting surface moves to the low point of the adjusting inclined surface 23, in this process, the lever 10 drives the limiting pin 9 to move downwards and the limiting pin 9 is clamped in the limiting slot 2, that is, the rotation of the universal wheel 4 is limited and the line marking machine keeps straight walking.

[0021] Of course, the above description is not a limitation of the present application, the present application is not limited to the above examples, the changes, modifications, additions or replacements made by the person skilled in the art within the essential scope of the present application should also belong to the protection scope of the present application.

Claims

1. A road marking machine travel mechanism characterized by: The utility model provides a kind of universal wheel vehicle, including chassis (1), the drive wheel (6) of being arranged in the front of the chassis (1), the transmission mechanism (7) for driving the drive wheel (6) rotation, the mounting bracket (3) being installed in the rear of the chassis (1) by vertical rotation shaft (14), the universal wheel (4) being arranged on the mounting bracket (3) and the limiting mechanism (5) for the rotation of the universal wheel (4) is limited;The limiting mechanism (5) includes the limiting slot (2) opened on the mounting bracket (3) and the limiting pin (9) being arranged above the limiting slot (2) and top is connected with the lever (10);The adjusting plate (8) with the adjusting surface of height continuous change is fixed on the chassis (1), the lever (10) is erected on the adjusting surface and can be moved up and down by interacting with it to drive the limiting pin (9) to be inserted or leave the limiting slot (2).

2. The road marking machine travel mechanism of claim 1, wherein: The mounting bracket (3) includes mounting disc (12) and two universal wheel plates (13) being arranged symmetrically below the mounting disc (12), and the rotation shaft (14) is fixed above the mounting disc (12);The limiting slot (2) is opened on the mounting disc (12);The universal wheel (4) is arranged between the two universal wheel plates (13).

3. The road marking machine travel mechanism of claim 2, wherein: The through hole is opened on the chassis (1) for the rotation shaft (14) to pass through, and the spacer sleeve (16) is arranged between the rotation shaft (14) and the chassis (1);After the rotation shaft (14) passes through the through hole, the end portion is sleeved with the pressure pad (17) and is provided with the lock nut for fastening.

4. The road marking machine travel mechanism of claim 3, wherein: The lower conical roller bearing (18), the shaft sleeve (19) and the upper conical roller bearing (20) are sequentially sleeved between the mounting disc (12) and the spacer sleeve (16) on the rotation shaft (14), and the shaft sleeve (19) is fixedly connected with the chassis (1).

5. The road marking machine travel mechanism of claim 2, wherein: The through slot is opened on the universal wheel plate (13) and the universal wheel shaft (15) is erected in it, and the universal wheel (4) is arranged on the universal wheel shaft (15) through bearing, and the universal wheel shaft (15) is fastened on the universal wheel plate (13) through the lock nut at both ends.

6. A road marking machine travel mechanism according to any one of claims 1 to 5 wherein: The limiting sleeve (21) is fixed on the chassis (1), the limiting pin (9) is arranged in the limiting sleeve (21), and the blind hole nut (22) is screwed on the top end of the limiting pin (9);The compression spring is arranged between the limiting pin (9) and the limiting sleeve (21) for resetting the limiting pin (9) after moving;The lever (10) is fixed on the side surface of the blind hole nut (22).

7. A road marking machine travel mechanism according to any one of claims 1 to 5 wherein: The adjusting surface includes the adjusting inclined surface (23) and the adjusting plane (24) connected;When the action point of the lever (10) and the adjusting surface is located at the bottom of the adjusting inclined surface (23), the limiting pin (9) is inserted into the limiting slot (2);When the action point of the lever (10) and the adjusting surface is located on the adjusting plane (23), the limiting pin (9) is separated from the limiting slot (2).

8. The road marking machine travel mechanism of claim 1, wherein: Two driving wheel plates (25) are symmetrically arranged below the rear of the chassis (1), a through hole is formed in the driving wheel plate (25), a driving wheel shaft (26) passes through the through hole, and the driving wheel (6) is mounted on both sides of the driving wheel shaft (26).

9. The road marking machine travel mechanism of claim 1, wherein: The transmission mechanism (7) comprises a gear set (27) arranged on the chassis (1) for transmitting driving force and a driving sprocket (28) arranged at the end of the gear set (27); a driven sprocket (30) is fixed to the hub cover (29) on the inner side of the driving wheel (6); and chain transmission is formed between the driving sprocket (28) and the driven sprocket (30).

10. The road marking machine travel mechanism of claim 1, wherein: The chassis (1) is spliced by aluminum alloy profiles.

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