Anti-collision mechanism for sweeper truck

Abstract

The utility model relates to an anti-collision mechanism for a sweeper truck, which comprises a rotating arm, a mounting seat, a main bearing, an air cylinder and two limiting rods, the mounting seat is rotatably connected with the rotating arm through the main bearing, the main bearing is an integral double-row tapered roller bearing, the main bearing is arranged on a bearing position inside the rotating arm, and the air cylinder is arranged on the rotating arm. An inner ring of the main bearing is mounted on the mounting seat shaft and is locked with a first bolt through a check ring arranged at the top of the main bearing for axial positioning, a sealing ring is assembled between the lower end of the main bearing and the mounting seat, an O-shaped ring is assembled between the upper end of the main bearing and the end cover, and the two limiting rods are symmetrically arranged on the two sides of the mounting seat; the driving side of the rotating arm is connected with the head of the cylinder to form a kinematic pair; and the cylinder diameter parameter of the cylinder is matched with the jet counter-acting force of the high-pressure nozzle. The three actions of pushing out, withdrawing and avoiding are achieved through the same rotating mechanism, the structure is simple, the number of parts is small, the weight is light, assembling and disassembling are convenient, and the service life of the whole mechanism is greatly prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical equipment technical field, specifically say a kind of anti-collision mechanism for road sweeper. BACKGROUND

[0002] Road sweeper as today's road mechanization cleaning main equipment, part model has washing ground function, by engine or motor provides power source and drives water pump, pumped water flow generally exceeds 10Mpa, forms high-pressure water flow, water flow is again through various pipelines, reaches various model high-pressure nozzle, enters high-pressure nozzle and shoots water flow and strikes ground to reach the function of washing road surface. To reach certain size of washing width, part high-pressure nozzle is stretched out from vehicle body by a specific mechanism to reach the width required for use. Road sweeper is operated at road side, operating speed is 5-30km / h, there are rock, tree and other obstacles at road side, when driving at high speed, driver cannot avoid obstacles in time, so the mechanism should have passive obstacle avoidance function. The obstacle avoidance mechanism of current road sweeper is all realized by two sets of combined structures to realize swing arm pushing out, retraction and avoidance, specifically, swing arm pushing out and retraction are realized by one set of combined structure, and swing arm avoidance is realized by another set of structure, because of complex structure, self-weight is too heavy, and cylinder only plays the role of pushing out and retraction, cannot play buffering role, secondly, multiple bearings are combined as rotating structure, cannot guarantee bearing axial play, so bearing retainer is easy to be scattered. Therefore, when operating, bearing is damaged, service life is short, and durability is poor, which troubles users. SUMMARY

[0003] In view of the above problems, the utility model provides an anti-collision mechanism for road sweeper, which realizes three actions of pushing out, retraction and avoidance through the same rotating mechanism, has simple structure, light weight and long service life of the whole mechanism.

[0004] The utility model provides a kind of anti-collision mechanism for road sweeper, which solves the above technical problems, and the technical scheme is as follows: the anti-collision mechanism for road sweeper includes rotating arm, mounting seat, main bearing, cylinder and two limit rods, the mounting seat is rotatably connected with the rotating arm by the main bearing, and the main bearing is an integrated double-row tapered roller bearing, the main bearing is arranged in the bearing position inside the rotating arm, the inner ring of the main bearing is arranged on the shaft of the mounting seat and axially positioned by the lock ring arranged on the top of the main bearing and the first bolt, a sealing ring is arranged between the lower end of the main bearing and the mounting seat, and an O-ring is arranged between the upper end of the main bearing and the end cover, the sealing effect is further improved by the multi-stage sealing of the integrated double-row tapered roller bearing itself and the arrangement of the sealing ring and the O-ring. The two limit rods are symmetrically arranged on both sides of the mounting seat, and the rotating arm driving side is connected with the head of the cylinder to form a kinematic pair.

[0005] As a preferred embodiment, the shaft of the main bearing and the mounting seat is loosely fitted, and the end cover is tightly screwed on the end face of the main bearing by the second bolt to form a pressure limit.

[0006] Preferably, the two limiting rods are arranged at an angle with the mounting base, and the limiting rods are provided with threads, and the rotation angle of the rotating arm is adjusted by adjusting the corresponding position.

[0007] Preferably, the mounting base is fixed to the suction nozzle body, one end of the rotating arm away from the mounting base is fixed to the side spraying rod, the side spraying rod is provided with a high-pressure nozzle, and the cylinder diameter parameter of the cylinder is matched with the jet reaction force of the high-pressure nozzle.

[0008] Preferably, the driving side of the rotating arm is rotatably connected to the head of the cylinder through a hinge joint, and the tail of the cylinder is fixed to the suction nozzle body through a pin shaft.

[0009] Preferably, a telescopic protective sleeve is sleeved on the push rod of the cylinder.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1. The utility model discloses a function optimization: compared with the existing structure in the market, the device realizes three actions of pushing out, retracting and avoiding through the same rotating mechanism, the cylinder of the device not only provides power for the swinging out and retracting of the swing arm, but also effectively reduces the axial rigidity of the cylinder under full gas pressure by reasonably setting the cylinder parameter, that is, reasonably matching the cylinder diameter, on the basis of single bearing design, the innovation makes the swing arm passively retract when encountering external impact, buffer function is realized, when the swing arm is impacted, the cylinder quickly reacts, active avoidance of the swing arm is realized, rigid collision damage is greatly reduced, swing arm damage caused by collision is reduced, swing arm service life is prolonged, maintenance cost is reduced, and powerful guarantee is provided for the safe and stable operation of the road sweeper under complex road conditions.

[0012] 2. The utility model discloses a structure optimization: compared with the structure on the market, the device is simple in structure, greatly simplifies the structure, and the number of parts is reduced by 45%, not only the assembly complexity is effectively reduced, but also the potential fault points are reduced, and the overall reliability is improved, at the same time, the weight is reduced by 50%, the equipment operation load is reduced, and the energy use efficiency is improved, on the cost level, the cost is greatly reduced due to the structure simplification and lightweight design, in addition, the device adopts an integrated bearing, the innovative design ensures the high consistency of the bearing axial play from the source, effectively resists the impact of road vibration on the bearing, reduces the bearing damage risk caused by vibration transmission, prolongs the service life of the overall mechanism, reduces the later maintenance cost, and brings excellent economic benefit and practical value for the user.

[0013] 3, The utility model discloses maintenance cost reduction: the overall maintenance -free design concept, from main bearing self -sealing combines simple maintenance -free oil seal, forms multilayer sealing structure, prevents the impurity such as mud and enters the bearing interior while effectively controlling cost, reduces the failure due to pollution. Meanwhile, reduce the workload of routine maintenance, improve the use efficiency of road sweeper, reduce manual maintenance cost;

[0014] 4, The utility model discloses assembly disassembly convenient: the loose fit design of main bearing and mounting seat axle, and the pressure limit inner ring rotation mode that the end cover is tightened in the main bearing end face through the second bolt, both guarantee the stability of main bearing when working, guarantee its service life, and when needing to disassemble maintenance, it is more convenient and fast, improve the maintenance efficiency;

[0015] 5, The utility model discloses adaptability enhancement: the limiting rod that can be length adjusted through screw thread is equipped on the mounting seat, can flexibly adjust the rotation angle of rotating arm according to different working scenes, makes the obstacle avoidance mechanism better adapt to the diversified working environment, improves the working adaptability and obstacle avoidance effect of road sweeper. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structure schematic diagram of the utility model;

[0017] Figure 2 It is the partial structure explosion schematic diagram of the utility model;

[0018] Figure 3 It is the cylinder extension, and the rotating arm retraction state schematic diagram of the utility model;

[0019] Figure 4 It is the cylinder retraction, and the rotating arm opening state schematic diagram of the utility model. DETAILED DESCRIPTION

[0020] The utility model will be combined in the following with Figures 1-4 Detailed description, in this the illustrative embodiment of the utility model and the explanation of the utility model are used to explain the utility model, but do not as the limitation of the utility model.

[0021] The anti-collision mechanism for the road sweeper comprises a rotating arm 7, a mounting seat 9, a main bearing 6, a gas cylinder 12 and two limiting rods 10, the mounting seat is fixed on a suction nozzle body, the mounting seat is rotatably connected with the rotating arm through the main bearing, the main bearing is an integrated double-row tapered roller bearing, the main bearing is arranged in a bearing position inside the rotating arm, an inner ring of the main bearing is arranged on a mounting seat shaft and is axially positioned by being locked through a retaining ring 5 arranged on a top of the main bearing and a first bolt 3, a sealing ring 8 is arranged between a lower end of the main bearing and the mounting seat, and an O-ring 4 is arranged between an upper end of the main bearing and an end cover 2, meanwhile, the shaft of the main bearing and the mounting seat is in a loose fit, and the end cover is fastened on an end surface of the main bearing through a second bolt 1 to form a pressure, so as to limit rotation of the inner ring of the main bearing, which not only guarantees the service life, but also facilitates assembly and disassembly. The two limiting rods are symmetrically arranged on two sides of the mounting seat, and a driving side of the rotating arm is connected with a head of the gas cylinder to form a pair of moving parts. In the scheme, the driving side of the rotating arm is rotatably connected with the head of the gas cylinder through a hinge 11, a tail of the gas cylinder is fixed on the suction nozzle body through a pin shaft, a telescopic protective sleeve is sleeved on a push rod of the gas cylinder, which is beneficial to protecting the gas cylinder and improving the service life of the gas cylinder, one end of the rotating arm away from the mounting seat is fixed on a side spraying rod, a high-pressure nozzle is arranged on the side spraying rod, so as to drive the high-pressure nozzle to avoid obstacles, the high-pressure nozzle can be arranged as a plurality of high-pressure nozzles according to operation requirements, and the cylinder diameter parameters of the gas cylinder and the jet reaction force of the high-pressure nozzle form a matching relationship, that is, the high-pressure nozzle pressure, flow and quantity on the side spraying rod are matched with the appropriate cylinder parameters. By adopting the appropriate cylinder diameter, the axial rigidity of the gas cylinder under full gas pressure is reduced, so that the gas cylinder can be passively retracted under the premise of a single bearing when the swing arm is subjected to external impact, so as to achieve that the swing arm avoids external rigid collision and reduces damage of the swing arm caused by the collision.

[0022] Further, the two limiting rods are arranged at an angle with the mounting seat, and the limiting rods are provided with threads, so that the rotating angle of the rotating arm is adjusted by adjusting the corresponding positions through the threads according to different working scenes.

[0023] In the implementation process, the length of the limiting rod is adjusted through the thread adjustment according to different working scenes, the rotating arm is driven to a specified working rotating angle by the gas cylinder, the rotating arm is pulled to a recovery state by a driving force source of the gas cylinder after the work is completed, and the angle of the rotating arm is avoided by the compressible characteristics of the gas cylinder gas when the emergency obstacle avoidance is performed, so that the obstacle avoidance function is realized.

[0024] The technical scheme provided by the embodiment of the utility model is described in detail above, the principle and implementation mode of the embodiment of the utility model are described by applying specific examples in this paper, and the description of the above embodiments is only applicable to helping understand the principle of the embodiment of the utility model; meanwhile, for the general technical personnel in the art, the embodiment of the utility model will have changes in the specific implementation mode and application range, and the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A crash avoidance mechanism for a road sweeping vehicle, characterized by: It includes a rotating arm (7), a mounting base (9), a main bearing (6), a cylinder (12) and two limiting rods (10), the mounting base is rotatably connected with the rotating arm through the main bearing, the main bearing is an integrated double-row tapered roller bearing, the main bearing is arranged in a bearing position inside the rotating arm, an inner ring of the main bearing is arranged on a shaft of the mounting base and is axially positioned by a retaining ring (5) and a first bolt (3) arranged on a top of the main bearing, a sealing ring (8) is arranged between a lower end of the main bearing and the mounting base, an O-ring (4) is arranged between an upper end of the main bearing and an end cover (2), the two limiting rods are symmetrically arranged on two sides of the mounting base, and a driving side of the rotating arm is connected with a head of the cylinder to form a pair of moving parts.

2. The anti-collision mechanism for the road sweeper vehicle of claim 1, wherein: The shaft of the main bearing and the mounting base is in loose fit, the end cover is tightened on an end face of the main bearing through a second bolt (1) to form pressure limiting.

3. The anti-collision mechanism for the road sweeper vehicle of claim 1, wherein: The two limiting rods are arranged at an angle with the mounting base, and the limiting rods are provided with threads, the rotating angle of the rotating arm is adjusted by adjusting the corresponding positions through the threads.

4. The anti-collision mechanism for the road sweeper vehicle of claim 1, wherein: The mounting base is fixed on a suction nozzle body, one end of the rotating arm away from the mounting base is fixed on an edge spraying rod, the edge spraying rod is provided with a high-pressure nozzle, a cylinder diameter parameter of the cylinder and a jet reaction force of the high-pressure nozzle form a matching relationship.

5. The anti-collision mechanism for a road sweeper as claimed in claim 1, wherein: The driving side of the rotating arm is rotatably connected with the head of the cylinder through a hinge joint (11), and a tail of the cylinder is fixed on the suction nozzle body through a pin shaft.

6. The anti-collision mechanism for a road sweeper as claimed in claim 1, wherein: A telescopic protective sleeve is sleeved on a push rod of the cylinder.

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