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CN-122013704-A - Side-mounted passive steering suction nozzle wheel assembly for road sweeper

CN122013704ACN 122013704 ACN122013704 ACN 122013704ACN-122013704-A

Abstract

The invention relates to a side-mounted passive steering suction nozzle wheel assembly for a road sweeper, which comprises a mounting bracket, two ball head assemblies, a bearing seat, a shaft, a tire assembly and the like. The two ball head assemblies are connected with the mounting bracket through the ball heads with taper, the ball seats with flanges are connected with the bearing seats, so that a double-ball head parallel suspension is formed, a virtual main pin is formed, the connecting line of the two ball head mounting holes is arranged to form an included angle with a vertical line, and the adjusting gaskets are additionally arranged at the ball head assemblies below, so that the main pin is inclined backwards and inclined inwards, and the functions of passive follow-up steering, automatic alignment and linear stable walking of the tire assembly are realized. In particular, the central plane of the tire is overlapped with the axis of the virtual kingpin through structural design, so that zero transverse offset is realized, and the offset abrasion phenomenon of the side-mounted steering wheel is eliminated from the root. In addition, the tire assembly adopts a multistage seal and special bearing structure, so that the durability and the safety under severe working conditions are improved.

Inventors

  • WANG YU
  • YIN BING
  • WANG XIANG

Assignees

  • 长沙本星智能科技有限公司

Dates

Publication Date
20260512
Application Date
20260210

Claims (9)

  1. 1. A side-mounted passive steering nozzle wheel assembly for a sweeper truck, comprising: a mounting bracket (14) for laterally mounting to the nozzle body; Each ball head assembly (3) comprises a ball seat (35) with two hole flange surfaces and a ball rod (34) with taper, and a ball head (31) at one end of the ball rod far away from the taper is assembled in a ball head hole of the ball seat; Wherein, the ball rods of the two ball head assemblies (3) respectively pass through two ball rod mounting holes (33) on the mounting bracket (14) and are locked by nuts (15), so that the conical surface of the ball rod (34) is matched with the conical surface of the mounting hole; The bearing seat (4) is connected with ball seat flanges of the two ball head assemblies (3) through first bolts (22); The integral bearing (10) is an integral maintenance-free double-row angular contact ball bearing or a maintenance-free double-row tapered roller bearing, is arranged in the bearing seat (4), and realizes axial limit through the oil seal seat (5); the shaft (7) is arranged in the bearing inner ring of the integral bearing (10) in a penetrating manner; The tire assembly comprises an integrally vulcanized or split-assembled hub assembly (2) and a tire (1), wherein the hub assembly (2) is assembled at the front end of the shaft (7) through conical surface fit and is locked through a front end gland assembly; the connecting line of the ball centers of the two ball head assemblies (3) forms a virtual main pin, and the central plane of the tire assembly coincides with the axis of the virtual main pin so as to realize zero transverse offset.
  2. 2. The side-mounted passive steering nozzle wheel assembly for the road sweeper according to claim 1, wherein an included angle B is formed between a connecting line of centers of two ball arm mounting holes (33) on the mounting bracket (14) and a vertical line, the caster is realized, and the axial height of the gasket (24) is adjusted by increasing or decreasing the flange surface of the ball seat and the bearing seat (4) so as to finely adjust the length difference of the two ball head assemblies (3), so that the caster is realized.
  3. 3. The side-mounted passive steering nozzle wheel assembly for the road sweeper according to claim 1, wherein the outer side and the inner side of the maintenance-free double-row angular contact ball bearing and the maintenance-free double-row tapered roller bearing are respectively provided with a first framework oil seal (29), the side-mounted passive steering nozzle wheel assembly further comprises a bearing outer ring (26), symmetrically arranged double-half bearing inner rings (27) and two ball assemblies (28) arranged between the bearing inner rings and the bearing outer rings, and the minimum diameter D1 of the bearing outer rings is smaller than the maximum diameter D2 of the bearing inner rings.
  4. 4. The side-mounted passive steering suction nozzle wheel assembly for the road sweeper according to claim 1, wherein the oil seal seat is connected with the bearing seat through a second bolt (13), oil seal positions are respectively arranged inside the oil seal seat (5) and at the tail of the bearing seat (4), a second framework oil seal (12) is respectively arranged in the oil seal positions, a first O-shaped ring (23) is arranged between the oil seal seat (5) and the bearing seat (4), and a second O-shaped ring (11) is further arranged between the hub assembly (2) and the oil seal seat (5) to form a multistage sealing structure.
  5. 5. The side-mounted passive steering nozzle wheel assembly for the road sweeper according to claim 1, wherein at least two dismounting auxiliary threaded holes (25) are formed in a spoke of the hub assembly (2).
  6. 6. The side-mounted passive steering nozzle wheel assembly for the road sweeper of claim 1, wherein a dust cover (30) is arranged between the ball seat and the ball rod of the ball head assembly (3), two ends of the dust cover are respectively connected with the ball seat and the ball rod through a clamp, so that the ball head assembly (3) has maintenance-free capability, and meanwhile, a ball head at one end of the ball rod is assembled in a ball head hole of the ball seat in a spin riveting connection mode.
  7. 7. The side-mounted passive steering nozzle wheel assembly for the road sweeper according to claim 1, wherein the front end gland assembly comprises a front end gland (6) arranged at the front end of the shaft (7) and a first gland bolt (8) for pressing the front end gland (6), the front end gland (6) is provided with a decorative cover (9), and the rear end gland assembly comprises a rear end gland (16) positioned by a positioning pin (17) and arranged at the rear end of the shaft, and a second bolt (18), a spring pad (19) and a stop pad (20) which are assembled in sequence.
  8. 8. The side-mounted passive steering nozzle wheel assembly for a sweeper truck as set forth in claim 2, wherein said included angle B has a value ranging from 0.5 ° to 35 °.
  9. 9. The side-mounted passive steering nozzle wheel assembly for the sweeper truck of claim 4, wherein the bearing block, the integral bearing, the shaft, the front end gland of the front end gland assembly, the rear end gland of the rear end gland assembly, the oil seal block and the second framework oil seal are assembled and combined to form the integral hub bearing.

Description

Side-mounted passive steering suction nozzle wheel assembly for road sweeper Technical Field The invention relates to the technical field of road sweeper, in particular to a side-mounted passive follow-up steering suction nozzle wheel assembly for a road sweeper. Background The road sweeper is a main device for mechanically sweeping roads, and the suction nozzle body is generally provided with a plurality of suction nozzle wheel assemblies for supporting the suction nozzle body and keeping a reasonable gap between the suction nozzle body and the ground, so that the suction nozzle body is in a floating state to ensure uniform suction force. The suction nozzle body is generally arranged between the front axle and the rear axle of the vehicle body, and is also arranged in front of the front axle and behind the rear axle, and is generally in a passive dragging walking state, and has no advancing and steering functions. Most of suction nozzle wheels of the existing road sweeper are side-mounted directional wheels, and the suction nozzle wheels do not have a steering function. In the operation process, the road sweeper needs to adjust a route for avoiding curves or obstacles, and the vehicle cannot completely run straight when walking, so that the suction nozzle body passively follows the vehicle body to do curve motion. Because the directional wheel can not turn, the track change can be adapted only through the lateral sliding of the tire, the lateral load of the tire is increased, the single rolling friction motion is changed into rolling friction and sliding friction, the rapid abrasion of the tire is extremely easy to be caused, the service life is greatly shortened, and the tire can be maintained for about half a year generally. This not only increases maintenance costs and frequency, but also affects the continuity and economy of operation of the sweeper truck. There are a small number of suction nozzle wheels with steering function in the market, but there are many problems that the structure is complex, the volume is huge, or the existing sweeping machine is difficult to be adapted to the wide side mounting interface. In particular, for side-mounted steering wheels, how to effectively solve the inherent problem of eccentric wear of the tires, and to realize products which have compact size, reliable structure, no maintenance and can directly replace the existing directional wheels is still a technical blank which needs breakthrough in the field. Disclosure of Invention Aiming at the problems, the invention provides a side-mounted passive follow-up steering suction nozzle wheel assembly for a road sweeper, which fills the market blank. Secondly, the problem that the side-mounted suction nozzle wheel assembly is easy to wear and is not compact in structure is thoroughly solved. Further, the problem of rapid abrasion of the existing directional wheel is solved, the service life of the tire is remarkably prolonged, maintenance-free and height-free adjustment of the vehicle suction nozzle body in the life cycle of the suction nozzle wheel assembly is realized, and the sweeping machine can keep the optimal working state of delivery for a long time. The invention solves the technical problems by adopting the technical scheme that the side-mounted passive follow-up steering suction nozzle wheel assembly for the road sweeper comprises the following components: the mounting bracket is used for being laterally mounted on the suction nozzle body; each ball head assembly comprises a ball seat with two hole flange surfaces and a ball rod with taper, and a ball head at one end of the ball rod far away from the taper is assembled in a ball head hole of the ball seat; wherein, the ball rods of the two ball head assemblies respectively pass through the two ball rod mounting holes on the mounting bracket and are locked by nuts, so that the conical surface of the ball rod is matched with the conical surface of the mounting hole; The bearing seat is connected with ball seat flanges of the two ball head assemblies through first bolts; the integral bearing is an integral maintenance-free double-row angular contact ball bearing or a maintenance-free double-row tapered roller bearing, is arranged in the bearing seat, and realizes axial limit through an oil seal seat; The shaft penetrates through the bearing inner ring of the integral bearing; The tire assembly comprises an integrally vulcanized or split-assembled hub assembly and a tire, wherein the hub assembly is assembled at the front end of the shaft through conical surface fit and is locked through a front end gland assembly; the connecting line of the spherical centers of the two ball head assemblies forms a virtual master pin, and the central plane of the tire assembly coincides with the axis of the virtual master pin so as to realize zero transverse offset. Preferably, the connecting line of the centers of the two ball rod mounting holes on the mounting bracket and the ve