Damping front wheel supporting structure of marking vehicle

Abstract

A damping front wheel supporting structure of a marking vehicle comprises a stepped shaft, a rotating shaft fork, a mounting block, a base, a damping assembly and a rotating shaft, the stepped shaft is horizontally connected to the front side of a chassis of the marking vehicle, the rotating shaft fork is rotationally connected to the peripheral face of the stepped shaft, the mounting block is connected to one end of the rotating shaft fork, and the base is connected to the damping assembly. The base is connected to the lower side of the mounting block, one end of a connecting rod in the damping assembly is hinged to the base, the rotating shaft is rotationally connected to the other end of the connecting rod in the damping assembly, and the two ends of the rotating shaft are connected with front wheels. Through the arrangement of the rotating shaft fork, the whole vertical rotation of the front wheels of the marking vehicle can be realized, the four wheels are ensured to touch the ground at the same time, the stability of the marking vehicle in the running process is improved, and through the arrangement of the damping assembly, vibration generated when the marking vehicle crosses obstacles can be buffered, so that the marking vehicle runs stably.

Description

Technical Field

[0001] The utility model relates to the technical field of road marking equipment, in particular to a shock-absorbing front wheel supporting 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 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. When it encounters a slope, depression or earth bag during the forward movement, the marking vehicle will vibrate during the driving process, making it difficult to ensure the quality of the line shape. Summary of the invention

[0003] The utility model aims to overcome the defects and problems of unstable driving process and poor marking quality of the road marking vehicle in the prior art, and to provide a shock-absorbing front wheel support structure of the road marking vehicle with stable driving process and high marking quality.

[0004] To achieve the above objectives, the technical solution of the utility model is: a shock-absorbing front wheel support structure of a marking vehicle, comprising a stepped shaft, a rotating shaft fork, a mounting block, a base, a shock-absorbing assembly, and a rotating shaft, wherein the stepped shaft is horizontally connected to the front side of the chassis of the marking vehicle, the rotating shaft fork is rotatably connected to the outer circumferential surface of the stepped shaft, the mounting block is connected to one end of the rotating shaft fork, the base is connected to the lower side of the mounting block, one end of the connecting rod in the shock-absorbing assembly is hinged to the base, the rotating shaft is rotatably connected to the other end of the connecting rod in the shock-absorbing assembly, and the two ends of the rotating shaft are connected to the front wheels.

[0005] The shock absorbing assembly includes a base plate, two connecting rods, two hydraulic spring shock absorbers and a spring seat. The base plate is arranged horizontally and connected to the outer circumferential surface of the rotating shaft fork on the lower side. The two connecting rods are arranged symmetrically. One end of the two connecting rods are rotatably connected to the left and right sides of the base respectively, and the other ends of the two connecting rods are respectively sleeved on the outer circumferential surface of the rotating shaft. The upper sides of the two connecting rods close to the rotating shaft are connected with spring seats, and the left and right sides of the base plate are connected with spring seats. Connecting holes are opened on the spring seats, and high-strength bolts are connected in the connecting holes. One end of the two hydraulic spring shock absorbers is rotatably connected to the two spring seats on the base plate by high-strength bolts, and the other end is rotatably connected to the two spring seats on the connecting rods by high-strength bolts.

[0006] The cross-section of the base is H-shaped, and mounting holes and axle pins are provided on both sides of the base. One end of the axle pin is inserted into the mounting hole and fixedly connected to the base, and the other end of the axle pin is threadedly connected with a clamping nut, and one end of the connecting rod is inserted into the axle pin and abuts against the clamping nut.

[0007] A reinforcing plate is welded between the bottom plate and the rotating shaft fork.

[0008] The connecting rod is an arc-shaped structure and has shaft holes at both ends. One end of the connecting rod is sleeved on the shaft pin through the shaft hole, and the other end of the connecting rod is sleeved on the rotating shaft through the shaft hole.

[0009] The shock absorbing assembly as a whole is in a variable isosceles triangle structure, the distance from the center line of the axle pin to the center line of the connecting hole of the spring seat on the connecting rod is equal to the distance from the center line of the axle pin to the center line of the connecting hole of the spring seat on the bottom plate, and the base of the variable isosceles triangle structure is the distance between the center lines of the connecting holes at both ends of the hydraulic spring shock absorber.

[0010] The top surface of the base is a concave structure, and the bottom surface of the mounting block is a convex structure. The upper top wall of the base is connected to a mounting rod, and the mounting block fits with the base after passing through the mounting rod. The outer peripheral surface of the mounting rod is threadedly connected with an anti-loosening locking nut, and the lower end surface of the anti-loosening locking nut abuts against the upper end surface of the mounting block.

[0011] The stepped shaft includes a coaxially connected primary shaft, a secondary shaft and a tertiary shaft with external threads, the primary shaft is connected to the front side of the chassis, and the rotating shaft fork is rotatably connected to the outer circumferences of the primary shaft and the secondary shaft through bearings.

[0012] The mounting block is provided with a plurality of screw holes along the length direction, a screw is passed through the screw hole, one end of the screw is connected to the rotating shaft fork, the other end of the screw passes through the mounting block and is threadedly connected with a locking nut, and the locking nut abuts against one side of the mounting block.

[0013] The outer circumference of the tertiary shaft is sleeved with a pressure cover, one side of the pressure cover abuts against the end face of the secondary shaft, the end face of the secondary shaft is flush with the end face of the rotating shaft fork, a countersunk hole is provided on the side of the mounting block close to the secondary shaft, a mounting nut is arranged in the countersunk hole, the mounting nut is threadedly connected to the tertiary shaft and abuts against one side of the pressure cover.

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

[0015] 1. In the shock-absorbing front wheel support structure of a marking vehicle of the utility model, a rotating shaft fork is provided, so that the front wheel of the marking vehicle can be rotated vertically as a whole, so as to ensure that the four wheels are on the ground and improve the stability of the marking vehicle during driving. The front wheel support point and the two rear wheels form a plane triangle support, and the two front wheels form a point support by rotating vertically around the stepped shaft. When the wheels encounter an uneven road, the four wheels are always on the ground at the same time through the overall vertical rotation. Therefore, the utility model has a stable driving process and a high marking quality.

[0016] 2. In the shock-absorbing front wheel support structure of a marking vehicle of the utility model, the shock-absorbing assembly is set by utilizing the stability of the triangle, and its three hinged vertices form a variable isosceles triangle structure, the two waist lengths remain unchanged, and the hydraulic spring shock absorption is used to form a variable bottom side for vertical shock absorption, and the waist length is used as the radius to form an inscribed circle to ensure that the rod is reasonably stressed. Therefore, the utility model has a stable structure and good reliability.

[0017] 3. In the shock-absorbing front wheel support structure of a marking vehicle of the utility model, a hydraulic spring shock absorber is arranged. When the marking vehicle encounters an obstacle, the front wheel drives the connecting rod to rotate around the base, and at the same time, the spring in the hydraulic spring shock absorber is compressed to ensure that the four wheels are on the ground. At the same time, the vibration can be reduced to make the marking vehicle run smoothly. By arranging a reinforcement plate, the overall structure of the shock-absorbing assembly is more stable; the base adopts an H-shaped design, which is convenient for installing the connecting rod. At the same time, the connecting rod is tightened on the outside by a clamping nut to avoid loosening during the driving of the marking vehicle. Therefore, the utility model has a smooth driving process and high structural stability.

[0018] 4. In the shock-absorbing front wheel support structure of a marking vehicle of the utility model, the top of the base adopts a concave shape design, and the bottom of the mounting block adopts a convex shape design, so that the mounting block and the base are conveniently connected to form a whole, which is convenient for installation and maintenance; by setting a stepped shaft, a gland can be installed on the stepped shaft to limit the axial movement of the rotating shaft fork, and by setting a mounting nut and a gland, it is convenient to limit the axial displacement of the rotating shaft fork, and by installing a locking nut on the screw rod, the mounting block and the rotating shaft fork are connected to form a whole, making the overall structure more stable. Therefore, the utility model has a simple structure and high stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 It is a structural schematic diagram of Example 1 in the utility model.

[0021] Figure 3 It is a structural schematic diagram of the shock absorbing component in the utility model.

[0022] Figure 4It is a structural schematic diagram of the hydraulic spring shock absorber in the utility model.

[0023] Figure 5 It is a structural schematic diagram of the mounting block and the base in the utility model.

[0024] Figure 6 It is a cross-sectional schematic diagram of the rotating shaft fork, the mounting block and the stepped shaft in the utility model.

[0025] In the figure: stepped shaft 1, primary shaft 11, secondary shaft 12, tertiary shaft 13, pressure cover 14, mounting nut 15, rotating shaft fork 2, mounting block 3, countersunk hole 31, screw hole 32, threaded rod 33, anti-loosening nut 34, base 4, mounting hole 41, axle pin 42, clamping nut 43, shock absorbing assembly 5, base plate 51, connecting rod 52, hydraulic spring shock absorber 53, spring seat 54, connecting hole 55, high-strength bolt 56, axle hole 57, reinforcement plate 58, rotating shaft 6, front wheel 7, mounting rod 8, anti-loosening locking nut 9, chassis 10. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Example 1

[0027] See also Figures 1 to 6 A shock-absorbing front wheel support structure of a marking vehicle, comprising a stepped shaft 1, a rotating shaft fork 2, a mounting block 3, a base 4, a shock-absorbing assembly 5, and a rotating shaft 6. The stepped shaft 1 is horizontally connected to the front side of a chassis 10 of the marking vehicle, the rotating shaft fork 2 is rotatably connected to the outer peripheral surface of the stepped shaft 1, the mounting block 3 is connected to one end of the rotating shaft fork 2, the base 4 is connected to the lower side of the mounting block 3, one end of a connecting rod 52 in the shock-absorbing assembly 5 is hinged to the base 4, the rotating shaft 6 is rotatably connected to the other end of the connecting rod 52 in the shock-absorbing assembly 5, and the two ends of the rotating shaft 6 are connected to front wheels 7. The shock-absorbing assembly 5 comprises a bottom plate 51, two connecting rods 52 , two hydraulic spring shock absorbers 53 and spring seats 54, the base plate 51 is arranged horizontally and connected to the outer circumferential surface of the rotating shaft fork 2 at the lower side, the two connecting rods 52 are arranged symmetrically, one end of the two connecting rods 52 is rotatably connected to the left and right sides of the base 4 respectively, the other ends of the two connecting rods 52 are respectively sleeved on the outer circumferential surface of the rotating shaft 6, the two connecting rods 52 are connected to the upper side of the rotating shaft 6 close to the spring seats 54, the left and right sides of the base plate 51 are connected to the spring seats 54, the spring seats 54 are opened with connecting holes 55, and the connecting holes 55 are connected with high-strength bolts 56, one end of the two hydraulic spring shock absorbers 53 is rotatably connected to the two spring seats 54 on the base plate 51 through high-strength bolts 56, and the other end is rotatably connected to the two spring seats 54 on the connecting rods 52 through high-strength bolts 56. Example 2

[0028] The basic content is the same as that of Example 1, except that:

[0029] See also Figures 3 to 5 The cross section of the base 4 is H-shaped, and both sides of the base 4 are provided with mounting holes 41 and shaft pins 42. One end of the shaft pin 42 is inserted into the mounting hole 41 and fixedly connected to the base 4. The other end of the shaft pin 42 is threadedly connected with a clamping nut 43. One end of the connecting rod 52 is inserted into the shaft pin 42 and abuts against the clamping nut 43. A reinforcing plate 58 is welded between the bottom plate 51 and the rotating shaft fork 2. The connecting rod 52 is an arc-shaped structure and has shaft holes 57 at both ends. One end of the connecting rod 52 is sleeved on the shaft pin 42 through the shaft hole 57, and the other end of the connecting rod 52 is sleeved on the rotating shaft 6 through the shaft hole 57. Example 3

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

[0031] See also Figure 3 and Figure 4 The shock absorbing assembly 5 is a variable isosceles triangle structure as a whole. The distance from the center line of the shaft pin 42 to the center line of the connecting hole 55 of the spring seat 54 on the connecting rod 52 is equal to the distance from the center line of the shaft pin 42 to the center line of the connecting hole 55 of the spring seat 54 on the bottom plate 51. The base of the variable isosceles triangle structure is the distance between the center lines of the connecting holes 55 at both ends of the hydraulic spring shock absorber 53. The top surface of the base 4 is a concave structure, and the bottom surface of the mounting block 3 is a convex structure. The upper top wall of the base 4 is connected to a mounting rod 8. The mounting block 3 fits with the base 4 after passing through the mounting rod 8. The outer peripheral surface of the mounting rod 8 is threadedly connected to a locking nut 9. The lower end surface of the locking nut 9 abuts against the upper end surface of the mounting block 3. Example 4

[0032] The basic content is the same as that of Example 1, except that:

[0033] See also Figure 6The stepped shaft 1 includes a primary shaft 11, a secondary shaft 12 and a tertiary shaft 13 with external threads which are coaxially connected. The primary shaft 11 is connected to the front side of the chassis 10. The rotating shaft fork 2 is rotatably connected to the outer circumference of the primary shaft 11 and the secondary shaft 12 through a bearing. The mounting block 3 is provided with a plurality of screw holes 32 along the length direction. A screw 33 is inserted into the screw hole 32. One end of the screw 33 is connected to the rotating shaft fork 2. The other end of the screw 33 passes through the mounting block 3 and is threadedly connected to a locking nut 34. The locking nut 34 abuts against one side of the mounting block 3. The outer circumference of the tertiary shaft 13 is sleeved with a pressure cover 14, one side of the pressure cover 14 abuts against the end face of the secondary shaft 12, the end face of the secondary shaft 12 is flush with the end face of the rotating shaft fork 2, and the mounting block 3 is provided with a countersunk hole 31 on the side close to the secondary shaft 12, and a mounting nut 15 is arranged in the countersunk hole 31, and the mounting nut 15 is threadedly connected to the tertiary shaft 13 and abuts against one side of the pressure cover 14.

Claims

1. A shock-absorbing front wheel support structure for a marking vehicle, characterized in that: The invention comprises a stepped shaft (1), a rotating shaft fork (2), a mounting block (3), a base (4), a shock absorbing assembly (5), and a rotating shaft (6), wherein the stepped shaft (1) is horizontally connected to the front side of a chassis (10) of a marking vehicle, the rotating shaft fork (2) is rotatably connected to the outer peripheral surface of the stepped shaft (1), the mounting block (3) is connected to one end of the rotating shaft fork (2), the base (4) is connected to the lower side of the mounting block (3), one end of a connecting rod (52) in the shock absorbing assembly (5) is hinged on the base (4), the rotating shaft (6) is rotatably connected to the other end of the connecting rod (52) in the shock absorbing assembly (5), and both ends of the rotating shaft (6) are connected to front wheels (7).

2. The shock-absorbing front wheel support structure of a line marking vehicle according to claim 1, characterized in that: The shock absorbing assembly (5) comprises a base plate (51), two connecting rods (52), two hydraulic spring shock absorbers (53) and a spring seat (54). The base plate (51) is arranged horizontally and connected to the outer peripheral surface of the rotating shaft fork (2) at the lower side. The two connecting rods (52) are arranged symmetrically. One end of the two connecting rods (52) is rotatably connected to the left and right sides of the base (4) respectively. The other ends of the two connecting rods (52) are respectively sleeved on the outer peripheral surface of the rotating shaft (6). The upper sides of the two connecting rods (52) close to the rotating shaft (6) are connected to the spring seat (54). 4), the left and right sides of the bottom plate (51) are connected to spring seats (54), the spring seats (54) are provided with connection holes (55), the connection holes (55) are connected with high-strength bolts (56), one end of the two hydraulic spring shock absorbers (53) are respectively rotatably connected to the two spring seats (54) on the bottom plate (51) through the high-strength bolts (56), and the other end is respectively rotatably connected to the two spring seats (54) on the connecting rod (52) through the high-strength bolts (56).

3. The shock-absorbing front wheel support structure of a line marking vehicle according to claim 2, characterized in that: The cross section of the base (4) is H-shaped, and mounting holes (41) and shaft pins (42) are provided on both sides of the base (4). One end of the shaft pin (42) is inserted into the mounting hole (41) and fixedly connected to the base (4), and the other end of the shaft pin (42) is threadedly connected to a clamping nut (43), and one end of the connecting rod (52) is inserted into the shaft pin (42) and abuts against the clamping nut (43).

4. The shock-absorbing front wheel support structure of a line marking vehicle according to claim 2, characterized in that: A reinforcing plate (58) is welded between the bottom plate (51) and the rotating shaft fork (2).

5. The shock-absorbing front wheel support structure of a line marking vehicle according to claim 3, characterized in that: The connecting rod (52) is an arc-shaped structure and has shaft holes (57) at both ends. One end of the connecting rod (52) is sleeved on the shaft pin (42) through the shaft hole (57), and the other end of the connecting rod (52) is sleeved on the rotating shaft (6) through the shaft hole (57).

6. The shock-absorbing front wheel support structure of a line marking vehicle according to claim 3, characterized in that: The shock absorbing assembly (5) is in the form of a variable isosceles triangle structure as a whole. The distance from the center line of the shaft pin (42) to the center line of the connecting hole (55) of the spring seat (54) on the connecting rod (52) is equal to the distance from the center line of the shaft pin (42) to the center line of the connecting hole (55) of the spring seat (54) on the bottom plate (51). The base of the variable isosceles triangle structure is the distance between the center lines of the connecting holes (55) at both ends of the hydraulic spring shock absorber (53).

7. The shock-absorbing front wheel support structure of a line marking vehicle according to claim 6, characterized in that: The top surface of the base (4) is in a concave shape, and the bottom surface of the mounting block (3) is in a convex shape. The top wall of the base (4) is connected to a mounting rod (8), and the mounting block (3) fits with the base (4) after passing through the mounting rod (8). The outer peripheral surface of the mounting rod (8) is threadedly connected to a locking nut (9), and the lower end surface of the locking nut (9) abuts against the upper end surface of the mounting block (3).

8. The shock-absorbing front wheel support structure of a line marking vehicle according to claim 1, characterized in that: The stepped shaft (1) comprises a coaxially connected primary shaft (11), a secondary shaft (12) and a tertiary shaft (13) with external threads, the primary shaft (11) being connected to the front side of the chassis (10), and the rotating shaft fork (2) being rotatably connected to the outer circumferential surfaces of the primary shaft (11) and the secondary shaft (12) via bearings.

9. The shock-absorbing front wheel support structure of a line marking vehicle according to claim 8, characterized in that: The mounting block (3) is provided with a plurality of screw holes (32) along the length direction, a screw (33) is inserted into each of the screw holes (32), one end of the screw (33) is connected to the rotating shaft fork (2), and the other end of the screw (33) passes through the mounting block (3) and is threadedly connected to a locking nut (34), and the locking nut (34) abuts against one side of the mounting block (3).

10. The shock-absorbing front wheel support structure of a line marking vehicle according to claim 8, characterized in that: The outer circumferential surface of the tertiary shaft (13) is sleeved with a pressure cover (14), one side of the pressure cover (14) abuts against the end face of the secondary shaft (12), the end face of the secondary shaft (12) is flush with the end face of the rotating shaft fork (2), and the mounting block (3) is provided with a countersunk hole (31) on the side close to the secondary shaft (12), and a mounting nut (15) is arranged in the countersunk hole (31), and the mounting nut (15) is threadedly connected to the tertiary shaft (13) and abuts against one side of the pressure cover (14).

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