CN-122010025-A - Lifting mechanism of high-altitude rescue fire-fighting vehicle frame and gap adjustment maintenance method

CN122010025ACN 122010025 ACN122010025 ACN 122010025ACN-122010025-A

Abstract

The invention relates to the technical field of fire trucks, in particular to a lifting mechanism of a fire truck for high-altitude rescue and a gap adjustment maintenance method, which comprises a chassis, a movable ladder hinged on the chassis, a lifting cylinder for driving the movable ladder to perform pitching action, and at least one lifting center column, wherein one end of the lifting center column is rotatably connected with the chassis, the other end of the lifting center column is rotatably connected with the movable ladder, the lifting center column is configured into a multi-section telescopic structure and stretches along with the pitching action of the movable ladder, and a gap adjustment part is arranged on at least one section of telescopic rod of the lifting center column and is used for adjusting and limiting the fit gap between the telescopic rods. According to the lifting mechanism of the high-altitude rescue fire-fighting frame, the lifting center column is additionally arranged between the chassis and the movable ladder, so that the gravity load of the movable ladder is effectively shared, and the lateral rigidity is remarkably improved. The left-right shaking and torsion of the movable ladder during high-altitude operation can be greatly restrained, and the stability and safety of the rescue platform are improved.

Inventors

SHAN PING
GU XIAOKANG
MA LIE
MA HAIBING
Ling Weishan

Assignees

江苏天一航空工业股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260408

Claims (13)

1. The lifting mechanism of the high-altitude rescue fire truck frame comprises a movable ladder (200) hinged on a chassis (100) and a lifting oil cylinder (500) for driving the movable ladder (200) to perform pitching action, and is characterized by further comprising at least one lifting center column (300), wherein one end of the lifting center column (300) is rotatably connected with the chassis (100), the other end of the lifting center column is rotatably connected with the movable ladder (200), and the lifting center column (300) is configured into a multi-section telescopic structure and stretches along with the pitching action of the movable ladder (200); And a gap adjusting part (400) is arranged on at least one section of telescopic rod of the lifting middle column (300) and is used for adjusting and limiting the fit gap between the sections of telescopic rods.
2. The lifting mechanism for the high-altitude rescue fire truck frame as claimed in claim 1, wherein the lifting center column (300) and the lifting oil cylinder (500) together with the chassis (100) and the movable ladder (200) form a triangular supporting structure.
3. The lifting mechanism for the high-altitude rescue fire truck frame as claimed in claim 2, wherein the lifting center column (300) comprises two groups of telescopic rod assemblies (301) which are arranged at left and right intervals, at least one connecting beam (302) is arranged between the left and right groups of telescopic rod assemblies (301), and two ends of the connecting beam (302) are respectively and fixedly connected to corresponding sections of the left and right groups of telescopic rod assemblies (301).
4. The lifting mechanism for the high-altitude rescue fire truck frame according to claim 1 or 3, wherein the gap adjusting component (400) is arranged at a sleeving part of an outer layer rod body and an inner layer rod body of the lifting middle column (300); The gap adjusting component (400) comprises an installing groove (401) formed in the side wall of the outer-layer rod body, a guide piece (402) which is contained in the installing groove (401) and is in butt joint with the outer wall of the inner-layer rod body, and an installing plate (403) which is arranged outside the outer-layer rod body and covers the installing groove (401), wherein an inwards-extending adjusting piece (404) is arranged on the installing plate (403).
5. The lifting mechanism for the high-altitude rescue fire truck frame as defined in claim 4, wherein the gap adjusting component (400) further comprises a pressing plate (405) arranged in the mounting groove (401), the pressing plate (405) is located between the adjusting piece (404) and the guiding piece (402), the adjusting piece (404) passes through the mounting plate (403) and then abuts against the outer surface of the pressing plate (405), and the inner surface of the pressing plate (405) is attached to the outer surface of the guiding piece (402).
6. The lifting mechanism for the high-altitude rescue fire truck frame as claimed in claim 5, wherein a fixing plate (406) is further fixedly arranged around the mounting groove (401), the fixing plate (406) is fixed on the outer wall of the outer-layer rod body, and the mounting plate (403) is detachably connected to the fixing plate (406).
7. The lifting mechanism of the high-altitude rescue fire truck frame as claimed in claim 5 or 6, wherein the adjusting piece (404) is at least two adjusting bolts (404 a) axially arranged along the telescopic rod, and the mounting plate (403) is provided with threaded holes (404 b) matched with the adjusting bolts (404 a).
8. The lifting mechanism of the high-altitude rescue fire truck frame as claimed in claim 7, wherein the guide piece (402) is a nylon pad, the guide piece (402) is embedded in the mounting groove (401), and the inner side surface of the guide piece (402) is abutted with the outer surface of the inner-layer rod body.
9. The lifting mechanism for the high-altitude rescue fire truck frame as defined in any one of claims 1, 2, 3, 5, 6 and 8, wherein the lifting center column (300) comprises a first column (301 a) connected to a chassis (100), a third column (301 c) connected to a ramp (200), and a second column (301 b) located between the first column (301 a) and the third column (301 c), the third column (301 c) is sleeved outside the second column (301 b), and the second column (301 b) is sleeved outside the first column (301 a); Wherein, first post (301 a), second post (301 b) and third post (301 c) are rectangular tubular structure, just clearance adjustment component (400) set up respectively in the bottom of third post (301 c) and the bottom of second post (301 b) to the displacement of restriction inside body of rod.
10. The lifting mechanism of the high-altitude rescue fire truck frame as claimed in claim 9, wherein a rotating member (303) is arranged at the bottom end of the first column (301 a), the rotating member (303) is rotatably connected with the first column (301 a) and fixedly connected with the chassis (100), another rotating member (303) is arranged at the top end of the third column (301 c), and the other rotating member (303) is rotatably connected with the third column (301 c) and fixedly connected with the movable ladder (200).
11. A gap adjustment maintenance method is suitable for the lifting mechanism of the high-altitude rescue fire-fighting truck frame, which is characterized by comprising the following steps of, The lifting middle column (300) keeps a telescopic connection state, and an adjusting piece (404) is operated from the outside of the outer-layer rod body to enable the adjusting piece to move in a feeding mode towards the direction of the inner-layer rod body; the pressing plate (405) is used for receiving the thrust of the adjusting piece (404) and converting the thrust into surface contact pressure, and the guiding piece (402) is uniformly pushed to be closely attached to the outer surface of the inner-layer rod body, so that friction damping for preventing lateral shaking is established.
12. The gap-adjusting maintenance method of claim 11, further comprising, Releasing the compressed state of the adjusting piece (404); Removing the mounting plate (403) covered outside the mounting groove (401) to expose the mounting groove (401); the installation groove (401) is used as a maintenance window, and the old guide piece (402) is directly taken out and the new guide piece (402) is embedded; the mounting plate (403) is re-covered and the adjusting step is performed.
13. The gap adjusting and maintaining method according to claim 11 or 12, wherein the parallelism between the pressing plate (405) and the outer surface of the inner rod body is corrected by adjusting the pressing depth of the pressing plate (405) relative to the guide member (402) by the adjusting member (404).

Description

Lifting mechanism of high-altitude rescue fire-fighting vehicle frame and gap adjustment maintenance method Technical Field The invention relates to the technical field of fire engines, in particular to a lifting mechanism of a fire truck frame for high-altitude rescue and a gap adjusting and maintaining method. Background The high-altitude rescue fire engine is an essential device in urban fire control and emergency rescue, and mainly relies on a telescopic arm support or a ladder frame arranged on a chassis to convey rescue workers and equipment to a high-altitude appointed position. The existing high-altitude rescue fire truck generally adopts a single hydraulic cylinder or a double hydraulic cylinder to directly drive the movable ladder to pitch and change amplitude. However, as high-rise buildings increase, the lifting height of fire trucks is continually refreshed, and existing lifting mechanisms are increasingly exposed to problems. The traditional lifting mechanism is mainly supported by means of a hinge point of a lifting oil cylinder at the bottom and a hinge point of the tail. When the ladder is extended long (e.g., more than 30 meters or more), the ladder resembles a large cantilever beam. Under the influence of high altitude wind load, water cannon jet reaction force or personnel walking, the ladder frame is very easy to shake left and right (swing sideways) and twist. The shaking not only seriously affects the rescue precision, but also can cause the trapped personnel and the rescue personnel to generate strong panic feeling, and even the ladder frame structure can be damaged due to fatigue or overload. Disclosure of Invention The invention is provided in view of the problem of insufficient stability of the ladder frame of the existing high-altitude rescue fire-fighting frame lifting mechanism. Therefore, the invention aims to provide a lifting mechanism of a fire truck frame for high-altitude rescue, which aims to improve the stability of a movable ladder of a fire truck and reduce shaking during use. The lifting mechanism of the high-altitude rescue fire-fighting frame comprises a movable ladder hinged to a chassis, a lifting oil cylinder used for driving the movable ladder to perform pitching action, and at least one lifting center column, wherein one end of the lifting center column is rotatably connected to the chassis, the other end of the lifting center column is rotatably connected to the movable ladder, the lifting center column is configured into a multi-section telescopic structure and stretches along with the pitching action of the movable ladder, and a gap adjusting part is arranged on at least one section of telescopic rod of the lifting center column and used for adjusting and limiting fit gaps among all sections of telescopic rods. As an optimal scheme of the lifting mechanism of the high-altitude rescue fire-fighting vehicle frame, the lifting center column, the lifting oil cylinder, the chassis and the movable ladder form a triangular supporting structure. As a preferable scheme of the lifting mechanism of the high-altitude rescue fire-fighting vehicle frame, the lifting center column comprises two groups of telescopic rod assemblies which are arranged at intervals left and right, at least one connecting beam is arranged between the left and right groups of telescopic rod assemblies, and two ends of the connecting beam are respectively and fixedly connected to corresponding sections of the left and right groups of telescopic rod assemblies. The high-altitude rescue fire-fighting vehicle frame lifting mechanism is characterized in that the gap adjusting component is arranged at a sleeving part of an outer layer rod body and an inner layer rod body of the lifting center column, the gap adjusting component comprises a mounting groove formed in the side wall of the outer layer rod body, a guide piece accommodated in the mounting groove and abutted to the outer wall of the inner layer rod body, and a mounting plate arranged outside the outer layer rod body and covering the mounting groove, and an inwards-extending adjusting piece is arranged on the mounting plate. As a preferable scheme of the lifting mechanism of the high-altitude rescue fire-fighting vehicle frame, the gap adjusting component further comprises a pressing plate arranged in the mounting groove, the pressing plate is arranged between the adjusting piece and the guide piece, the adjusting piece passes through the mounting plate and then abuts against the outer surface of the pressing plate, and the inner surface of the pressing plate is attached to the outer surface of the guide piece. As an optimal scheme of the lifting mechanism of the high-altitude rescue fire-fighting vehicle frame, a fixing plate is fixedly arranged around the mounting groove, the fixing plate is fixed on the outer wall of the outer-layer rod body, and the mounting plate is detachably connected to the fixing plate. As an optimal scheme of the l