CN215927948U

CN215927948U - Flexible arm straightness adjustment system that hangs down of platform fire engine ascends a height

Info

Publication number: CN215927948U
Application number: CN202122182633.7U
Authority: CN
Inventors: 李祥啟; 李文明; 朱玉莘
Original assignee: Dayang Parking Co Ltd
Current assignee: Dayang Parking Co Ltd
Priority date: 2021-09-09
Filing date: 2021-09-09
Publication date: 2022-03-01
Anticipated expiration: 2031-09-09

Abstract

The embodiment of the utility model discloses a verticality adjusting system for a telescopic arm of a fire truck of a climbing platform, which belongs to the technical field of fire fighting and rescue equipment and comprises a telescopic arm hinged to the tail of an automobile chassis, wherein a turning hydraulic cylinder is mounted on the automobile chassis, one end of the turning hydraulic cylinder is hinged to the automobile chassis, the other end of the turning hydraulic cylinder is hinged to the telescopic arm, front hydraulic support legs are mounted on the automobile chassis on the left and right sides of the position close to a cab of an automobile, rear hydraulic support legs are mounted on the telescopic arm on the left and right sides of the position far away from the cab of the automobile, transition hydraulic cylinders are mounted on the left and right sides of the position at the tail end of the automobile chassis, an inclination angle sensor is mounted on the telescopic arm, and the turning hydraulic cylinder, the front hydraulic support legs, the rear hydraulic support legs, the transition hydraulic cylinder and the inclination angle sensor are all connected with a control unit. The utility model solves the technical problem that the verticality in the lifting process of the traditional telescopic boom cannot be adjusted, and is widely applied to high-altitude fire fighting or rescue.

Description

Flexible arm straightness adjustment system that hangs down of platform fire engine ascends a height

Technical Field

The embodiment of the utility model relates to the technical field of fire fighting and rescue equipment, in particular to a system for adjusting the verticality of a telescopic arm of a fire fighting truck with an ascending platform.

Background

At present, the telescopic boom of a high-altitude fire-fighting rescue vehicle usually has two forms, one is a crank arm structure, the other is a telescopic cylinder structure, the number of the sections of the crank arm structure is small, the number of the sections of the telescopic cylinder structure is large, and in the telescopic boom of the existing telescopic cylinder structure, the sliding gap between the telescopic joints is large, so that the telescopic joints are seriously shaken after being stretched out, most of the telescopic booms adopt inclined lifting, and the dead weight of the telescopic booms is utilized to overcome the sliding gap between the telescopic joints. However, in the vertically lifting telescopic arm, the superposition of the sliding gaps can lead to the telescopic arm to tilt, so that the gravity center of the automobile chassis is unstable, and even the vehicle can roll over. Therefore, how to keep the perpendicularity of the telescopic boom in the lifting process is a technical problem troubling the technical personnel in the field.

Therefore, in the technical field of fire fighting and rescue equipment, the need of research and improvement on the verticality adjusting system of the telescopic arm of the elevating platform fire fighting truck still exists, which is a research focus and a focus in the technical field of fire fighting and rescue equipment at present and is a starting point of the utility model.

SUMMERY OF THE UTILITY MODEL

Therefore, the embodiment of the utility model provides a system for adjusting the verticality of a telescopic arm of a fire truck of a climbing platform, which aims to solve the technical problem that the verticality cannot be adjusted in the lifting process of the conventional telescopic arm.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

according to the embodiment of the utility model, the verticality adjusting system comprises a telescopic arm which is hinged to the tail of an automobile chassis, a turning hydraulic cylinder is installed on the automobile chassis, one end of the turning hydraulic cylinder is hinged to the automobile chassis, the other end of the turning hydraulic cylinder is hinged to the telescopic arm, front hydraulic support legs are installed on the automobile chassis close to the left side and the right side of a cab of an automobile respectively, rear hydraulic support legs are installed on the telescopic arm far away from the left side and the right side of the cab of the automobile respectively, transition hydraulic cylinders are installed on the automobile chassis tail end respectively, an inclination angle sensor is installed on the telescopic arm, and the turning hydraulic cylinder, the front hydraulic support legs, the rear hydraulic support legs, the transition hydraulic cylinder and the inclination angle sensor are all connected with a control unit.

Furthermore, every two working ports of the front hydraulic support leg are respectively connected with an oil inlet pipeline and an oil return pipeline through a first reversing valve, every two working ports of the rear hydraulic support leg are respectively connected with the oil inlet pipeline and the oil return pipeline through a second reversing valve, every two working ports of the transition hydraulic oil cylinder are respectively connected with the oil inlet pipeline and the oil return pipeline through a third reversing valve, and the two working ports of the turnover hydraulic oil cylinder are respectively connected with the oil inlet pipeline and the oil return pipeline through a fourth reversing valve.

Furthermore, the first reversing valve, the second reversing valve, the third reversing valve and the fourth reversing valve are Y-shaped three-position four-way electromagnetic reversing valves, and the first reversing valve, the second reversing valve, the third reversing valve and the fourth reversing valve are all connected with the control unit.

Furthermore, the rodless cavity of the front hydraulic support leg is connected with the oil port A of the first reversing valve through a first hydraulic control one-way valve, the rod cavity of the front hydraulic support leg is connected with the oil port B of the first reversing valve through a second hydraulic control one-way valve, the hydraulic control port of the first hydraulic control one-way valve is connected with the oil port B of the first reversing valve, the hydraulic control port of the second hydraulic control one-way valve is connected with the oil port A of the first reversing valve, the oil port P of the first reversing valve is communicated with an oil inlet pipeline, and the oil port T of the first reversing valve is communicated with an oil return pipeline; the rodless cavity of the rear hydraulic support leg is connected with the oil port A of the second reversing valve through a third hydraulic control one-way valve, the rod cavity of the rear hydraulic support leg is connected with the oil port B of the second reversing valve through a fourth hydraulic control one-way valve, the hydraulic control port of the third hydraulic control one-way valve is connected with the oil port B of the second reversing valve, the hydraulic control port of the fourth hydraulic control one-way valve is connected with the oil port A of the second reversing valve, the oil port P of the second reversing valve is communicated with an oil inlet pipeline, and the oil port T of the second reversing valve is communicated with an oil return pipeline; the rodless cavity of the transition hydraulic oil cylinder is connected with an oil port A of the third reversing valve through a fifth hydraulic control one-way valve, the rod cavity of the transition hydraulic oil cylinder is connected with an oil port B of the third reversing valve through a sixth hydraulic control one-way valve, a hydraulic control port of the fifth hydraulic control one-way valve is connected with the oil port B of the third reversing valve, the hydraulic control port of the sixth hydraulic control one-way valve is connected with the oil port A of the third reversing valve, an oil port P of the third reversing valve is communicated with an oil inlet pipeline, and an oil port T of the third reversing valve is communicated with an oil return pipeline.

The embodiment of the utility model has the following advantages:

(1) the tilt angle sensor on the telescopic arm monitors the tilt condition of the telescopic arm at any time and feeds the tilt condition back to the control unit, and the control unit controls the overturning hydraulic cylinder, the front hydraulic support leg, the rear hydraulic support leg or the transition hydraulic cylinder in the corresponding direction to compensate the tilt amount of the telescopic arm so as to keep the telescopic arm in a vertical state, thereby solving the technical problem that the verticality of the existing telescopic arm in the lifting process can not be adjusted.

(2) Because the front hydraulic support leg, the rear hydraulic support leg and the transition hydraulic oil cylinder are all provided with the two hydraulic control one-way valves, the current pressure of the front hydraulic support leg, the rear hydraulic support leg and the transition hydraulic oil cylinder can be kept, the leakage of hydraulic oil caused by the change of bearing is avoided, and the current verticality of the telescopic boom is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a layout diagram of the cylinders according to the embodiment of the present invention;

FIG. 3 is a hydraulic control schematic of an embodiment of the present invention;

in the figure: 1. automobile chassis, 2, telescopic boom, 3, preceding hydraulic leg, 4, back hydraulic leg, 5, upset hydraulic cylinder, 6, transition hydraulic cylinder, 7, oil inlet pipeline, 8, return oil pipeline, 9, first switching-over valve, 10, second switching-over valve, 11, third switching-over valve, 12, fourth switching-over valve, 13, first liquid accuse check valve, 14, second liquid accuse check valve, 15, third liquid accuse check valve, 16, fourth liquid accuse check valve, 17, fifth liquid accuse check valve, 18, sixth liquid accuse check valve.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the utility model will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the utility model and that it is not intended to limit the utility model to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the present specification, the terms "front", "rear", "left", "right" and "middle" are used for clarity of description only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof are also regarded as the scope of the present invention without substantial changes in the technical content.

As shown in fig. 1 and 2, the embodiment of the utility model provides a verticality adjusting system for a telescopic arm of a fire truck with a climbing platform, which comprises a telescopic arm 2 which is hinged and installed at the tail part of a vehicle chassis 1, wherein a turning hydraulic cylinder 5 is installed on the vehicle chassis 1, one end of the turning hydraulic cylinder 5 is hinged and installed on the vehicle chassis 1, the other end of the turning hydraulic cylinder 5 is hinged and installed on the telescopic arm 2, front hydraulic support legs 3 are respectively installed at the left and right of the position, close to a cab of a vehicle, on the vehicle chassis 1, respectively, rear hydraulic support legs 4 are installed at the left and right of the position, far away from the cab of the vehicle, on the telescopic arm 2, transition hydraulic cylinders 6 are respectively installed at the left and right of the tail end position of the vehicle chassis 1, an inclination angle sensor is installed on the telescopic arm 2, the turning hydraulic cylinder 5, the front hydraulic support legs 3, the rear hydraulic support legs 4, the transition hydraulic support legs 6 and the inclination angle sensor are all connected with a control unit, when the inclination angle sensor detects that the telescopic arm 2 inclines, the control unit controls the corresponding oil cylinder to act, adjusts the inclination angle of the telescopic arm 2 and ensures the verticality of the telescopic arm 2 in the lifting process. During the adjustment, preferentially correct the straightness that hangs down of flexible arm 2 through the flexible volume of adjustment distance flexible arm 2 nearest transition hydraulic cylinder 6 and back hydraulic leg 4, the distance is far away preceding hydraulic leg 3 is as driven adjustment because of considering automobile chassis 1's deflection, in order to reach the effect of stable support, it is serious when flexible arm 2 slopes, when back hydraulic leg 4 and transition hydraulic cylinder 6's adjustment volume can't satisfy normal correction, then change flexible arm 2's inclination through upset hydraulic cylinder 5, in order to guarantee the straightness that hangs down of flexible arm 2.

As shown in fig. 3, two working ports of each front hydraulic leg 3 are respectively connected with an oil inlet pipeline 7 and an oil return pipeline 8 through a first reversing valve 9, two working ports of each rear hydraulic leg 4 are respectively connected with the oil inlet pipeline 7 and the oil return pipeline 8 through a second reversing valve 10, two working ports of each transition hydraulic cylinder 6 are respectively connected with the oil inlet pipeline 7 and the oil return pipeline 8 through a third reversing valve 11, and two working ports of the turnover hydraulic cylinder 5 are respectively connected with the oil inlet pipeline 7 and the oil return pipeline 8 through a fourth reversing valve 12. The first reversing valve 9, the second reversing valve 10, the third reversing valve 11 and the fourth reversing valve 12 are Y-shaped three-position four-way electromagnetic reversing valves, and the first reversing valve 9, the second reversing valve 10, the third reversing valve 11 and the fourth reversing valve 12 are all connected with the control unit.

Specifically, a rodless cavity of the front hydraulic support leg 3 is connected with an oil port A of the first reversing valve 9 through a first hydraulic control one-way valve 13, a rod cavity of the front hydraulic support leg 3 is connected with an oil port B of the first reversing valve 9 through a second hydraulic control one-way valve 14, a hydraulic control port of the first hydraulic control one-way valve 13 is connected with the oil port B of the first reversing valve 9, a hydraulic control port of the second hydraulic control one-way valve 14 is connected with the oil port A of the first reversing valve 9, an oil port P of the first reversing valve 9 is communicated with the oil inlet pipeline 7, and an oil port T of the first reversing valve 9 is communicated with the oil return pipeline 8; the rodless cavity of the rear hydraulic support leg 4 is connected with the oil port A of the second reversing valve 10 through a third hydraulic control one-way valve 15, the rod cavity of the rear hydraulic support leg 4 is connected with the oil port B of the second reversing valve 10 through a fourth hydraulic control one-way valve 16, the hydraulic control port of the third hydraulic control one-way valve 15 is connected with the oil port B of the second reversing valve 10, the hydraulic control port of the fourth hydraulic control one-way valve 16 is connected with the oil port A of the second reversing valve 10, the oil port P of the second reversing valve 10 is communicated with the oil inlet pipeline 7, and the oil port T of the second reversing valve 10 is communicated with the oil return pipeline 8; the rodless cavity of the transition hydraulic oil cylinder 6 is connected with the oil port A of the third reversing valve 11 through the fifth hydraulic control one-way valve 17, the rod cavity of the transition hydraulic oil cylinder 6 is connected with the oil port B of the third reversing valve 11 through the sixth hydraulic control one-way valve 18, the hydraulic control port of the fifth hydraulic control one-way valve 17 is connected with the oil port B of the third reversing valve 11, the hydraulic control port of the sixth hydraulic control one-way valve 18 is connected with the oil port A of the third reversing valve 11, the oil port P of the third reversing valve 11 is communicated with the oil inlet pipeline 7, and the oil port T of the third reversing valve 11 is communicated with the oil return pipeline 8. In the embodiment of the utility model, the front hydraulic support leg 3, the rear hydraulic support leg 4 and the transition hydraulic oil cylinder 6 are respectively provided with two hydraulic control one-way valves, so that the current pressure of the hydraulic control one-way valves can be kept, the leakage of hydraulic oil caused by bearing change is avoided, and the current verticality of the telescopic arm 2 is ensured.

Preceding hydraulic leg 3, transition hydraulic cylinder 6 all stretch out and support in ground, and upset hydraulic cylinder 5 supports telescopic boom 2 in vertical direction, and back hydraulic leg 4 stretches out and supports in ground for vehicle chassis 1 keeps the level, and telescopic boom 2 begins to stretch out, and when inclination sensor detected telescopic boom 2 and leaned on to a certain direction, the hydraulic cylinder of the relevant position of control unit control stretched out, compensated inclination at any time, made telescopic boom 2 be in vertical state always. For example, the tilt sensor detects that the telescopic boom 2 inclines towards the left front hydraulic leg 3, at this time, the control unit controls the third reversing valve 11 to be switched to the rodless cavity oil inlet position of the direction transition hydraulic cylinder 6, at this time, the sixth hydraulic control one-way valve 18 is opened by hydraulic oil, the rodless cavity oil inlet of the transition hydraulic cylinder 6 is realized, the hydraulic oil in the rod cavity flows into the oil return pipeline 8 through the sixth hydraulic control one-way valve 18, the piston rod of the transition hydraulic cylinder 6 extends out, the telescopic boom 2 is righted to be in a vertical state, in the adjustment process, the control unit controls the front hydraulic leg 3 in the direction to correspondingly extend out for a certain distance, the overall level of the automobile chassis 1 is met, the control process of the control unit is the same as that of the transition hydraulic cylinder 6, and the description is omitted here.

Although the utility model has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the utility model. Accordingly, such modifications and improvements are intended to be within the scope of the utility model as claimed.

Claims

1. The utility model provides a flexible arm straightness adjustment system that hangs down of platform fire engine ascends a height, its characterized in that, including articulated the flexible arm of installing in vehicle chassis afterbody, install upset hydraulic cylinder on the vehicle chassis, the articulated one end of upset hydraulic cylinder install in on the vehicle chassis, the other end is articulated install in on the flexible arm, respectively install preceding hydraulic leg about the driver's cabin position that is close to the car on the vehicle chassis, respectively install back hydraulic leg about the driver's cabin position of keeping away from the car on the flexible arm, respectively install transition hydraulic cylinder about vehicle chassis tail end position, install inclination sensor on the flexible arm, equal the control unit of upset hydraulic cylinder, preceding hydraulic leg, back hydraulic leg, transition hydraulic cylinder and inclination sensor.

2. The system for adjusting the perpendicularity of the telescopic boom of the elevating platform fire truck according to claim 1, wherein two working ports of each front hydraulic leg are respectively connected with an oil inlet pipeline and an oil return pipeline through a first reversing valve, two working ports of each rear hydraulic leg are respectively connected with the oil inlet pipeline and the oil return pipeline through a second reversing valve, two working ports of each transition hydraulic cylinder are respectively connected with the oil inlet pipeline and the oil return pipeline through a third reversing valve, and two working ports of each overturning hydraulic cylinder are respectively connected with the oil inlet pipeline and the oil return pipeline through a fourth reversing valve.

3. The system for adjusting the perpendicularity of the telescopic arm of the elevating platform fire truck according to claim 2, wherein the first reversing valve, the second reversing valve, the third reversing valve and the fourth reversing valve are Y-shaped three-position four-way electromagnetic reversing valves, and the first reversing valve, the second reversing valve, the third reversing valve and the fourth reversing valve are all connected with the control unit.

4. The system for adjusting the perpendicularity of the telescopic arm of the elevating platform fire truck according to claim 3, wherein a rodless cavity of the front hydraulic support leg is connected with an oil port A of a first reversing valve through a first hydraulic control one-way valve, a rod cavity of the front hydraulic support leg is connected with an oil port B of the first reversing valve through a second hydraulic control one-way valve, a hydraulic control port of the first hydraulic control one-way valve is connected with the oil port B of the first reversing valve, an oil port A of the first reversing valve is connected with an oil port P of the first reversing valve, and an oil port T of the first reversing valve is communicated with an oil return pipeline; the rodless cavity of the rear hydraulic support leg is connected with the oil port A of the second reversing valve through a third hydraulic control one-way valve, the rod cavity of the rear hydraulic support leg is connected with the oil port B of the second reversing valve through a fourth hydraulic control one-way valve, the hydraulic control port of the third hydraulic control one-way valve is connected with the oil port B of the second reversing valve, the hydraulic control port of the fourth hydraulic control one-way valve is connected with the oil port A of the second reversing valve, the oil port P of the second reversing valve is communicated with an oil inlet pipeline, and the oil port T of the second reversing valve is communicated with an oil return pipeline; the rodless cavity of the transition hydraulic oil cylinder is connected with an oil port A of the third reversing valve through a fifth hydraulic control one-way valve, the rod cavity of the transition hydraulic oil cylinder is connected with an oil port B of the third reversing valve through a sixth hydraulic control one-way valve, a hydraulic control port of the fifth hydraulic control one-way valve is connected with the oil port B of the third reversing valve, the hydraulic control port of the sixth hydraulic control one-way valve is connected with the oil port A of the third reversing valve, an oil port P of the third reversing valve is communicated with an oil inlet pipeline, and an oil port T of the third reversing valve is communicated with an oil return pipeline.