Universal support steering structure of marking vehicle

Abstract

A universal supporting and steering structure of a line marking vehicle comprises a connecting shaft, a rotating shaft fork, a steering block, a direction shaft fork, a front axle, front wheels and a brake assembly, the connecting shaft is horizontally connected to the front side of a chassis of the line marking vehicle, and one end of the rotating shaft fork is rotationally connected to the peripheral face of the connecting shaft along the axis of the connecting shaft; the steering block is connected to the other end of the rotating shaft fork, the direction shaft fork is horizontally and rotationally connected to the lower side of the steering block, the front axle is horizontally arranged and rotationally connected to the lower side of the direction shaft fork, and the front wheels are connected to the two ends of the front axle. The brake assembly is installed on the inner side, close to the lower portion, of the direction shaft fork, and the brake assembly is used for automatically locking the front axle when the marking vehicle stops working. According to the design, vertical rotation can be achieved through the rotating shaft fork, horizontal rotation can be achieved through the direction shaft fork, adaptability is high, safety is high, and mounting and dismounting are easy and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of road marking equipment, in particular to a universal support steering structure of a road marking vehicle. Background Art

[0002] Before construction, it is often necessary to draw the boundary line and construction reference line. For example, during the filling process of the highway subgrade, a grid needs to be drawn for zoning and filling, the excavation of the foundation pit needs to be marked to determine the boundary, and the construction of the auxiliary project ditch needs to be marked for reference. Therefore, construction layout is the most important part to ensure the normal progress of the project. At present, marking vehicles are often used for marking. For example, a hand-pushed marking vehicle disclosed in Chinese patent announcement number CN210886885U is manually pushed to move the marking vehicle, and the marking material is evenly sprayed on the road with a paint bucket to mark the road. However, the wheel structure of the marking vehicle is relatively simple. During the forward process, when encountering slopes, depressions or earth mounds, the linear quality is difficult to guarantee due to the unstable support of the vehicle body. At the same time, due to the manual method, the vehicle is prone to slipping, resulting in poor safety. Summary of the invention

[0003] The utility model aims to overcome the defects and problems of poor adaptability and poor safety of the marking vehicle in the prior art, and to provide a universal support steering structure of the marking vehicle with strong adaptability and high safety.

[0004] To achieve the above objectives, the technical solution of the utility model is: a universal support steering structure of a marking vehicle, comprising a connecting shaft, a rotating shaft fork, a steering block, a steering shaft fork, a front axle, a front wheel, and a brake assembly, wherein the connecting shaft is horizontally connected to the front side of the chassis of the marking vehicle, one end of the rotating shaft fork is rotatably connected to the outer peripheral surface of the connecting shaft along the axis of the connecting shaft, the steering block is connected to the other end of the rotating shaft fork, the steering shaft fork is horizontally rotatably connected to the lower side of the steering block, the front axle is horizontally arranged and rotatably connected to the lower side of the steering shaft fork, the front wheel is connected to both ends of the front axle, the brake assembly is installed on the inner side of the steering shaft fork near the lower part, and the brake assembly is used to automatically lock the front axle when the marking vehicle stops operating.

[0005] The connecting shaft is in a three-step shape, and comprises a coaxially connected primary shaft, a secondary shaft and a tertiary shaft with external threads, and the rotating shaft fork is rotatably connected to the outer circumference of the primary shaft and the secondary shaft.

[0006] The steering block is provided with a plurality of screw holes along the length direction, a screw is arranged in the screw hole, one end of the screw passes through the steering block and is connected to the rotating shaft fork, the other end of the screw passes through the steering block and is threadedly connected to a fixing nut, and the fixing nut abuts against one side of the steering block.

[0007] The outer circumference of the tertiary shaft is sleeved with a pressure plate, and the pressure plate abuts against the end face of the secondary shaft. The steering block is provided with a mounting hole on the side close to the secondary shaft, and a mounting nut is arranged in the mounting hole. The mounting nut is threadedly connected to the tertiary shaft and abuts against one side of the pressure plate. The end face of the secondary shaft is flush with the end face of the rotating shaft fork.

[0008] Tapered roller bearings are connected between the rotating shaft fork and the primary shaft and the secondary shaft.

[0009] The direction shaft fork includes a mounting plate, a connecting rod, two direction limit pins and two connecting blocks. The mounting plate, the connecting rod and the two connecting blocks together form an inverted Y-shaped structure. The connecting rod is rotatably connected to the steering block. The mounting plate is connected to the lower end of the connecting rod. The two connecting blocks are symmetrically connected to the lower side of the mounting plate. The lower sides of the two connecting blocks are both provided with through holes for the front axle to pass through. The two direction limit pins are symmetrically connected to the upper side of the mounting plate. The two direction limit pins are used to horizontally limit the rotation angle of the direction shaft fork relative to the steering block.

[0010] The outer peripheral surface of the connecting rod is threadedly connected with an anti-loosening locking nut, and the anti-loosening locking nut is located on the upper side of the steering block.

[0011] A thrust bearing is connected to the lower side of the steering block, and the thrust bearing is sleeved on the outer peripheral surface of the connecting rod at the lower end.

[0012] The brake assembly includes a brake disc, a push-pull electromagnet, a rack, two mounting blocks, and a relay. The brake disc is sleeved on the outer circumference of the front axle, and the outer circumference of the brake disc is gear-shaped. The fixed end of the push-pull electromagnet is connected to the inner side of one of the connecting blocks. The relay is connected to the push-pull electromagnet. The movable end of the push-pull electromagnet is connected to the middle part of the rack. The two mounting blocks are respectively connected between the two connecting blocks. The upper and lower ends of the rack are respectively slidably connected to the two mounting blocks. The teeth of the rack are meshed and connected to the brake disc.

[0013] The mounting block is provided with a dovetail slot along the length direction, and the upper and lower ends of the rack are connected with sliders, the sliders are dovetail-shaped, and the two sliders are slidably connected in the two dovetail slots respectively.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. In the universal support steering structure of a marking vehicle of the utility model, the rotating shaft fork is used for point support, so that the overall vertical rotation of the front wheel can be realized. Therefore, when encountering a slope, a concave ground or a mound of earth, the vertical rotation of the front wheel can ensure that the four wheels touch the ground at the same time, so that the marking vehicle can mark the line smoothly. The steering shaft fork can make the front wheel rotate horizontally to achieve turning; when the marking vehicle stops working, the brake assembly automatically prevents the front axle from rotating to avoid slipping. Therefore, the utility model has strong adaptability and high safety.

[0016] 2. In the universal support steering structure of a marking vehicle of the utility model, the steering block and the rotating shaft fork are connected together by a screw connection method to form an integral body, which is convenient for installation and disassembly. The connecting shaft is formed in a stepped shape, which is convenient for connection with the rotating shaft fork and axial limitation in the direction of the large shaft diameter. By setting the mounting nut and the pressure plate, it is convenient to axially limit the rotating shaft fork in the direction of the small shaft diameter; the direction shaft fork adopts an inverted Y-shaped arc structure design, which is used to increase the steering torque to make the front wheel steering light and prevent structural deformation. By setting the thrust bearing, the friction between the steering block and the mounting plate can be reduced while bearing the load, which is convenient for the horizontal rotation of the connecting rod. The connecting rod is fastened by the anti-loosening locking nut. The front axle passes through the direction shaft fork hole and the two ends are connected to the front wheels. In this way, on an uneven road surface, the front axle is rotated vertically around the connecting shaft as a whole to realize the landing of the two front wheels. The vertical rotating triangle formed by the two front wheels and the center of the connecting shaft ensures the stability of the front part of the vehicle body. The point support formed by the center of the connecting shaft and the two rear wheel independent supports are combined to form a triangular support on the plane, so that the four wheels of the vehicle can stably land on the ground to ensure the overall stability of the vehicle. Therefore, the utility model is easy to install and disassemble and has a stable structure.

[0017] 3. In the universal support steering structure of a marking vehicle of the utility model, by designing the brake disc into a gear shape, the brake disc can mesh with the horizontally movable rack to limit the rotation of the front wheel, and one end of the rack side is connected to the push-pull electromagnet, and the push-pull electromagnet is electrically connected to the relay. When the vehicle travel motor is powered on, the relay is powered on to drive the push-pull electromagnet to move the rack, and the rack is automatically separated from the brake disc to facilitate the travel of the marking vehicle. When the travel motor is powered off, the relay is powered off, and the rack is horizontally slid and reset under the action of the spring force in the push-pull electromagnet to mesh with the rack for braking, so as to facilitate automatic braking at any time to prevent the vehicle from slipping. Therefore, the utility model is easy to operate and has high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is a partial structural schematic diagram of the marking vehicle in Example 1 of the utility model.

[0020] Figure 3It is a structural schematic diagram of a connecting shaft, a rotating shaft fork and a steering block in the utility model.

[0021] Figure 4 It is a cross-sectional schematic diagram of a connecting shaft, a rotating shaft fork and a steering block in the utility model.

[0022] Figure 5 It is a structural schematic diagram of the directional shaft fork in the utility model.

[0023] Figure 6 It is a partial enlarged view of the brake assembly, the front axle and the steering shaft fork in the utility model.

[0024] In the figure: rotating shaft fork 1, connecting shaft 2, primary shaft 21, secondary shaft 22, steering block 3, screw hole 31, mounting hole 32, direction shaft fork 4, connecting rod 41, mounting plate 42, connecting block 43, through hole 44, front axle 5, front wheel 6, brake assembly 7, brake disc 71, push-pull electromagnet 72, rack 73, mounting block 74, slider 75, dovetail slide 76, tertiary shaft 8, screw 9, mounting nut 10, anti-loosening locking nut 11, fixing nut 12, tapered roller bearing 13, thrust bearing 14, chassis 15, pressure plate 16, direction limit pin 17. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] Embodiment 1:

[0027] See also Figures 1 to 6 A universal support steering structure of a marking vehicle, comprising a connecting shaft 2, a rotating shaft fork 1, a steering block 3, a steering shaft fork 4, a front axle 5, a front wheel 6, and a brake assembly 7. The connecting shaft 2 is horizontally connected to the front side of a chassis 15 of the marking vehicle, one end of the rotating shaft fork 1 is rotatably connected to the outer peripheral surface of the connecting shaft 2 along the axis of the connecting shaft 2, the steering block 3 is connected to the other end of the rotating shaft fork 1, the steering shaft fork 4 is horizontally rotatably connected to the lower side of the steering block 3, the front axle 5 is horizontally arranged and rotatably connected to the lower side of the steering shaft fork 4, the front wheel 6 is connected to both ends of the front axle 5, the brake assembly 7 is installed on the inner side of the steering shaft fork 4 near the lower part, and the brake assembly 7 is used to automatically lock the front axle 5 when the marking vehicle stops operating.

[0028] In this embodiment, the marking vehicle adopts a four-wheel structure, and the two front wheels 6 are coaxial wheels. The vertical rotation is performed on the connecting shaft 2 by rotating the axle fork 1. The turning is achieved by slowing down or stopping one side of the rear wheel of the marking vehicle and accelerating the other side, thereby driving the direction axle fork 4 to rotate horizontally under the steering block 3.

[0029] Embodiment 2:

[0030] The basic content is the same as that of Example 1, except that:

[0031] See also Figure 2 and Figure 3 The connecting shaft 2 is in a three-step shape, and includes a primary shaft 21, a secondary shaft 22 and a tertiary shaft 8 with external threads that are coaxially connected. The rotating shaft fork 1 is rotatably connected to the outer circumference of the primary shaft 21 and the secondary shaft 22. The steering block 3 is provided with a plurality of screw holes 31 along the length direction, and a screw 9 is arranged in the screw hole 31. One end of the screw 9 passes through the steering block 3 and is connected to the rotating shaft fork 1. The other end of the screw 9 passes through the steering block 3 and is threadedly connected to a fixing nut 12, and the fixing nut 12 abuts against one side of the steering block 3. The outer circumference of the tertiary shaft 8 is sleeved with a pressure plate 16, which abuts against the end face of the secondary shaft 22. The steering block 3 is provided with a mounting hole 32 on the side close to the secondary shaft 22. A mounting nut 10 is provided in the mounting hole 32. The mounting nut 10 is threadedly connected to the tertiary shaft 8 and abuts against one side of the pressure plate 16. The end face of the secondary shaft 22 is flush with the end face of the rotating shaft fork 1. Tapered roller bearings 13 are connected between the rotating shaft fork 1 and the primary shaft 21 and the secondary shaft 22.

[0032] In this embodiment, the rotating shaft fork 1 uses multiple screws 9 to horizontally pass through the steering block 3 and is fastened to the steering block 3. A through hole is opened in the vertical center of the steering block 3, and the steering shaft fork 4 is installed in the through hole. When encountering a slope, a depression or a mound of earth, the rotating shaft fork 1 rotates vertically along the connecting shaft 2, thereby driving the steering block 3, the steering shaft fork 4, the front axle 5, and the front wheel 6 to rotate vertically synchronously to achieve four-wheel landing.

[0033] Embodiment 3:

[0034] The basic content is the same as that of Example 1, except that:

[0035] See also Figure 4The direction shaft fork 4 includes a mounting plate 42, a connecting rod 41, two direction stop pins 17 and two connecting blocks 43. The mounting plate 42, the connecting rod 41 and the two connecting blocks 43 are combined to form an inverted Y-shaped structure. The connecting rod 41 is rotatably connected to the steering block 3. The mounting plate 42 is connected to the lower end of the connecting rod 41. The two connecting blocks 43 are symmetrically connected to the lower side of the mounting plate 42. The lower sides of the two connecting blocks 43 are both provided with through holes 44 for the front axle 5 to pass through. The two direction stop pins 17 are symmetrically connected to the upper side of the mounting plate 42. The two direction stop pins 17 are used to horizontally limit the rotation angle of the direction shaft fork 4 relative to the steering block 3. The outer peripheral surface of the connecting rod 41 is threadedly connected with a locking nut 11, and the locking nut 11 is located on the upper side of the steering block 3. The lower side of the steering block 3 is connected with a thrust bearing 14, and the thrust bearing 14 is sleeved on the outer peripheral surface of the connecting rod 41 at the lower end.

[0036] In this embodiment, when turning, the steering shaft fork 4 rotates horizontally along the axis of the steering block 3, thereby driving the two front wheels 6 to rotate horizontally synchronously to achieve turning. The lower side of the connecting block 43 adopts an arc-shaped design. After the steering shaft fork 4 and the steering block 3 are installed, they are connected and fixed by screwing the anti-loosening locking nut 11 on the connecting rod 41.

[0037] Embodiment 4:

[0038] The basic content is the same as that of Example 1, except that:

[0039] See also Figure 5 The brake assembly 7 includes a brake disc 71, a push-pull electromagnet 72, a rack 73, two mounting blocks 74, and a relay. The brake disc 71 is sleeved on the outer peripheral surface of the front axle 5. The outer peripheral surface of the brake disc 71 is gear-shaped. The fixed end of the push-pull electromagnet 72 is connected to the inner side of one of the connecting blocks 43. The relay is connected to the push-pull electromagnet 72. The movable end of the push-pull electromagnet 72 is connected to the middle of the rack 73. The two mounting blocks 74 are respectively connected between the two connecting blocks 43. The upper and lower ends of the rack 73 are respectively slidably connected to the two mounting blocks 74. The teeth of the rack 73 are meshed and connected to the brake disc 71. The mounting block 74 is provided with a dovetail groove 76 along the length direction. The upper and lower ends of the rack 73 are connected to a slider 75. The slider 75 is dovetail-shaped. The two sliders 75 are respectively slidably connected in the two dovetail grooves 76.

[0040] In this embodiment, when the travel motor of the marking vehicle is energized, the relay is energized at the same time, and the push-pull electromagnet 72 is energized to drive the rack 73 to move horizontally, so that the rack 73 slides horizontally between the mounting blocks 74 and separates from the brake disc 71, and the spring of the push-pull electromagnet 72 is compressed, and the front axle 5 can rotate. When the travel motor is powered off, the relay is powered off, and the spring of the push-pull electromagnet 72 is reset. The rack 73 slides horizontally and resets under the action of the spring force and contacts and engages with the brake disc 71 to brake.

Claims

1. A universal support steering structure for a marking vehicle, characterized in that: The invention comprises a connecting shaft (2), a rotating shaft fork (1), a steering block (3), a steering shaft fork (4), a front axle (5), a front wheel (6), and a brake assembly (7), wherein the connecting shaft (2) is horizontally connected to the front side of a chassis (15) of a marking vehicle, one end of the rotating shaft fork (1) is rotatably connected to the outer peripheral surface of the connecting shaft (2) along the axis of the connecting shaft (2), the steering block (3) is connected to the other end of the rotating shaft fork (1), the steering shaft fork (4) is horizontally rotatably connected to the lower side of the steering block (3), the front axle (5) is horizontally arranged and rotatably connected to the lower side of the steering shaft fork (4), the front wheel (6) is connected to both ends of the front axle (5), and the brake assembly (7) is installed on the inner side of the steering shaft fork (4) near the lower part, and the brake assembly (7) is used to automatically lock the front axle (5) when the marking vehicle stops operating.

2. The universal support steering structure of a marking vehicle according to claim 1, characterized in that: The connecting shaft (2) is in a three-step shape, comprising a coaxially connected primary shaft (21), a secondary shaft (22) and a tertiary shaft (8) with external threads, and the rotating shaft fork (1) is rotatably connected to the outer circumferential surfaces of the primary shaft (21) and the secondary shaft (22).

3. The universal support steering structure of a marking vehicle according to claim 1, characterized in that: The steering block (3) is provided with a plurality of screw holes (31) along the length direction, a screw (9) is arranged in each of the screw holes (31), one end of the screw (9) passes through the steering block (3) and is connected to the rotating shaft fork (1), the other end of the screw (9) passes through the steering block (3) and is threadedly connected to a fixing nut (12), and the fixing nut (12) abuts against one side of the steering block (3).

4. The universal support steering structure of a marking vehicle according to claim 2, characterized in that: The outer circumferential surface of the tertiary shaft (8) is sleeved with a pressure plate (16), and the pressure plate (16) abuts against the end face of the secondary shaft (22). The steering block (3) is provided with a mounting hole (32) on the side close to the secondary shaft (22), and a mounting nut (10) is arranged in the mounting hole (32). The mounting nut (10) is threadedly connected to the tertiary shaft (8) and abuts against one side of the pressure plate (16). The end face of the secondary shaft (22) is flush with the end face of the rotating shaft fork (1).

5. The universal support steering structure of a marking vehicle according to claim 2, characterized in that: Tapered roller bearings (13) are connected between the rotating shaft fork (1) and the primary shaft (21) and the secondary shaft (22).

6. The universal support steering structure of a marking vehicle according to claim 1, characterized in that: The steering shaft fork (4) comprises a mounting plate (42), a connecting rod (41), two direction limiting pins (17) and two connecting blocks (43); the mounting plate (42), the connecting rod (41) and the two connecting blocks (43) are combined to form an inverted Y-shaped structure; the connecting rod (41) is rotatably connected to the steering block (3); the mounting plate (42) is connected to the lower end of the connecting rod (41); the two connecting blocks (43) are symmetrically connected to the lower side of the mounting plate (42); the lower sides of the two connecting blocks (43) are both provided with through holes (44) for the front axle (5) to pass through; the two direction limiting pins (17) are symmetrically connected to the upper side of the mounting plate (42); the two direction limiting pins (17) are used to horizontally limit the rotation angle of the steering shaft fork (4) relative to the steering block (3).

7. The universal support steering structure of a marking vehicle according to claim 6, characterized in that: The outer peripheral surface of the connecting rod (41) is threadedly connected with an anti-loosening locking nut (11), and the anti-loosening locking nut (11) is located on the upper side of the steering block (3).

8. The universal support steering structure of a marking vehicle according to claim 6, characterized in that: A thrust bearing (14) is connected to the lower side of the steering block (3), and the thrust bearing (14) is sleeved on the outer peripheral surface of the connecting rod (41) at the lower end.

9. The universal support steering structure of a marking vehicle according to claim 6, characterized in that: The brake assembly (7) comprises a brake disc (71), a push-pull electromagnet (72), a rack (73), two mounting blocks (74), and a relay. The brake disc (71) is sleeved on the outer peripheral surface of the front axle (5). The outer peripheral surface of the brake disc (71) is gear-shaped. The fixed end of the push-pull electromagnet (72) is connected to the inner side of one of the connecting blocks (43). The relay is connected to the push-pull electromagnet (72). The movable end of the push-pull electromagnet (72) is connected to the middle part of the rack (73). The two mounting blocks (74) are respectively connected between the two connecting blocks (43). The upper and lower ends of the rack (73) are respectively slidably connected to the two mounting blocks (74). The toothed portion of the rack (73) is meshedly connected to the brake disc (71).

10. The universal support steering structure of a marking vehicle according to claim 9, characterized in that: The mounting block (74) is provided with a dovetail slide groove (76) along the length direction. The upper and lower ends of the rack (73) are connected with sliders (75). The sliders (75) are dovetail-shaped. The two sliders (75) are slidably connected in the two dovetail slide grooves (76) respectively.

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