CN104891386A - Elbow joint arm lifting device with unpowered locked top point - Google Patents

Abstract

The invention relates to a lifting device for detecting the braking performance of a multi-axle vehicle, in particular to an elbow-joint arm lifting device with no dynamic locking apex. The device includes a lifting platform mechanism, an elbow arm mechanism, a lifting air bag mechanism and a bottom frame mechanism. The four corners of the mechanism set above the bottom frame mechanism are fixedly connected with the bottom frame mechanism by bolts; The airbag mechanism is fixedly connected by bolts. The invention provides an elbow-joint arm lifting device with no dynamic locking apex. The two sets of elbow-joint arm mechanisms bypass the unstable position of the dead point for lifting and lowering, which can test the braking safety of multi-axle trucks and automobile trains composed of parallel-axle semi-trailers.

Description

An Elbow-Joint Arm Lifting Device with No Power Locking Vertex

technical field

The invention relates to a lifting device for detecting the braking performance of a multi-axle vehicle, in particular to an elbow-joint arm lifting device with no dynamic locking apex.

Background technique

With the rapid development of national defense modernization and national economy, some special vehicles with high power and large carrying capacity have been widely used. Due to the limitation of road surface conditions and traffic regulations, simply relying on increasing the bearing capacity of a single axle and reducing the quality of the whole vehicle can no longer meet the requirements. The only way to meet the requirements of the national standard is to increase the number of axles. Therefore, the safety performance of multi-axle vehicles has been paid more and more attention.

According to the latest revision of GB21861 "Motor Vehicle Safety Technical Inspection Items and Methods", the standard revision highlights key vehicles and strengthens the safety technical inspection requirements for school buses, large and medium-sized buses, heavy and medium-sized trucks, and trailers. For multi-axle trucks and car trains composed of double-axle semi-trailers, it is necessary to carry out load braking inspection, so a roller reaction braking inspection table with platform lifting function is used. There is no such inspection in the domestic market. platform applications.

Patent No.: 95223459.9 discloses a car repair lifting platform, which is composed of a base, a supporting platform body and a lifting mechanism. The supporting platform body is hinged on the base with a rotating shaft to form a seesaw structure; the lifting mechanism is on one side of the rotating shaft , the upper end is hinged with the support platform, and the lower end is hinged with the base.

Patent No.: 201420267341.0 discloses a hydraulic lifting platform for automobile repair, including two sets of lifting frames. The lifting frame has a bottom frame with lower raceways on the left and right sides. There are support arms cross-connected by hinge shafts in the middle of the two sets of X-shape. The lower end of the support arm is connected to the chassis, and the upper end of the support arm is connected to the platform for parking the wheels. There are upper raceways on the left and right sides under the platform. A hydraulic cylinder is connected between the support arm and the base frame, and the opening angle of the two sets of cross-connected support arms is controlled by the piston rod of the hydraulic cylinder, so that the platform is raised or lowered in parallel. The hydraulic cylinders in the two sets of lifting frames Two hydraulic oil pipes are respectively connected to the same foot-operated hydraulic jack to simultaneously lift the rear wheels or front wheels on the left and right sides of the car.

The two car lifting platforms mentioned above cannot realize no-power locking at the highest lifting point, and occupy a large area, which is not conducive to the layout and placement of the test bench, and cannot be used in the reaction-type drum brake test. More can not realize the test of multi-axle vehicle loaded braking performance.

Therefore, the research and development structure is simple and reasonable, aiming at the load braking test bench for axle trucks and automobiles and trains composed of parallel axle semi-trailers, so as to standardize the load braking performance of multi-axle vehicles and ensure better safety and reliability. sex is an urgent task.

Contents of the invention

The purpose of the present invention is to solve the urgent need for a loaded brake inspection platform in the current market to inspect the brake safety of multi-axle trucks and automobile trains composed of parallel axle semi-trailers, and provides a non-powered locking Vertex rocker lift.

The technical solution of the present invention is described as follows in conjunction with the accompanying drawings of the description:

An elbow-joint arm lifting device with no power to lock the apex, the device includes a lifting platform mechanism A, two sets of elbow-joint arm mechanisms B, a lifting air bag mechanism C and a bottom frame mechanism D, the bottom frame mechanism D is horizontally fixed on the foundation, the two sets of elbow joint arm mechanisms B are fixed on the left and right ends above the bottom frame mechanism D, and the lift air bag mechanism C is arranged on the four corners above the bottom frame mechanism D and the bottom layer The frame mechanism D is fixedly connected by bolts; the lifting platform mechanism A is arranged above the elbow joint arm mechanism B, the lifting air bag mechanism C and the bottom frame mechanism D, and is fixedly connected with the elbow joint arm mechanism B by bolts. The upper ends of the lifting platform mechanism A and the lifting air bag mechanism C are fixed by long bolts.

The lifting platform mechanism A includes platform 1, No. 1 upper platform pin assembly 2, No. 2 upper platform pin assembly 3, No. 1 supporting roller assembly 4 and No. 2 supporting roller assembly 5. The No. 1 roller assembly 4 and the No. 2 roller assembly 5 have the same structure, and are symmetrically welded in the middle of the left and right sides of the platform 1; the platform 1 is a rectangular plate, and its left and right Holes are processed on the outer sides of the two sides. The holes run through the rectangular steel on the left and right sides of the table 1. The front and rear positions are symmetrical, and the left and right positions are symmetrical. The holes are concentrically fitted with the No. 1 upper table pin assembly 2 and the No. 2 upper table pin. Shaft assembly 3; the No. 1 upper deck pin assembly 2 and No. 2 upper deck pin assembly 3 have the same structure, and are composed of upper deck pin 6 and pin fixing bolt 7, and the upper deck pin 6 is installed In the platen hole; the platen 1 and the pin shaft 6 of the upper platen are fixedly connected by pin shaft fixing bolts 7 .

The elbow joint arm mechanism B includes a lower support arm seat assembly 8, a No. 1 upper support arm assembly 9, a No. 1 lower support arm assembly 10, a lower support rotating arm connecting pipe 11, a cylinder assembly 12, and a No. 2 support arm assembly. Upper support arm assembly 13 and No. 2 lower support arm assembly 14; said No. 1 upper support arm assembly 9 is arranged above No. 1 lower support arm assembly 10 and hinged with No. 1 lower support arm assembly 10; The No. 1 lower support arm assembly 10 includes the lower support arm 15, the No. 1 lower support arm pin assembly 16 and the No. 2 lower support arm pin assembly 17; the No. 1 lower support arm pin assembly Body 16 and No. 2 lower support arm pin assembly 17 are concentrically arranged at both ends of the lower support arm 15, and No. 1 lower support arm pin assembly 16 and No. 2 lower support arm pin assembly 17 are fixed on the lower support arm by screws. On the arm 15; wherein said lower supporting arm connecting pipe 11 is a tubular part, and its two ends are symmetrically welded with No. 1 lower supporting arm assembly 10 and No. 2 lower supporting arm assembly 14; No. 1 lower support arm assembly 10 and No. 2 lower support arm assembly 14 are installed concentrically with No. 1 lower support arm pin assembly 16 and lower support arm seat assembly 8; No. 1 upper support arm assembly 9 and 2 The No. 2 upper support arm assembly 13 is concentrically installed through the No. 2 lower support arm pin shaft assembly 17, and a steel plate and an ear seat are welded in the middle of the lower support arm connecting pipe 11 .

The lifting airbag mechanism C includes four airbag assemblies 18 and four adapter plates 19; the adapter plates 19 are arranged at the lower end of the airbag assembly 18 and are fixedly connected with the airbag assembly 18 by bolts.

The bottom frame mechanism D includes No. 1 channel steel 20, No. 2 channel steel 21, No. 3 channel steel 22, No. 4 channel steel 23, four rectangular plates 24, No. 1 guide groove 25 and No. 2 guide groove 26; The No. 1 channel steel 20 and No. 2 channel steel 21 have the same structure and are arranged on the longitudinal sides of the bottom frame mechanism D, with the grooves facing upward; the No. 3 channel steel 22 and No. 4 channel steel 23 are horizontally and laterally symmetrical Set, the groove faces down; the No. 1 channel steel 20, the No. 2 channel steel 21, the No. 3 channel steel 22, and the No. 4 channel steel 23 are welded together horizontally and vertically; the four rectangular plates 24 are welded on At the four corners of the bottom frame mechanism D, two opposite rectangular plates 25 have opposite notches; the No. 1 guide groove 25 and the No. 2 guide groove 26 have the same structure, and are vertically welded on the No. 1 channel steel 20, On the outside of the No. 2 channel steel 21, the No. 1 track roller assembly 4 is installed in the No. 1 guide groove 25, and the No. 2 track roller assembly 5 is installed in the No. 2 guide slot 26.

The four airbag assemblies 18 and the four adapter plates 19 are arranged directly above the four rectangular plates 25 and are fixedly connected with the rectangular plates 25 by bolts.

The beneficial effects of the present invention are:

1. The elbow-joint arm lifting device without power to lock the apex according to the present invention adopts two sets of elbow-joint arm mechanisms to perform lifting and lowering actions. The lowering action of the lifting platform.

2. The elbow joint arm lifting device without power locking apex according to the present invention adopts the air bag and the cylinder to act on the lifting and lowering, so that the lifting and lowering of the lifting platform can be balanced in force, and it also has a buffer effect.

3. The elbow-joint arm lifting device without power to lock the apex according to the present invention adopts a method of locking around the unstable position of the dead point so that the lifting platform can be stably at the highest position. At this time, the airbag and the cylinder All can stop inflation, which greatly reduces energy consumption and prolongs the service life of airbags and cylinders.

Description of drawings

Fig. 1 is the axonometric schematic view of the elbow-joint arm lifting device without power locking apex of the present invention;

Fig. 2 is a schematic diagram of the right side view of the highest lifting position of the elbow joint arm lifting device without power locking apex according to the present invention;

Fig. 3 is a schematic diagram of the right side view of the lowest landing position of the elbow-joint arm lifting device without power locking apex of the present invention;

Fig. 4 is a schematic diagram of the right side view of the lifting platform mechanism of the present invention;

Fig. 5 is a schematic sectional view of Fig. 4A-A of the present invention;

Fig. 6 is an axonometric schematic diagram of the No. 1 lifting platform pin assembly of the present invention;

Fig. 7 is an axonometric schematic diagram of No. 1 elbow joint arm mechanism B of the present invention;

Fig. 8 is an axonometric schematic view of the right lower arm assembly of No. 1 elbow joint arm mechanism B of the present invention;

Fig. 9 is a schematic cross-sectional view of the right lower arm assembly of No. 1 elbow joint arm mechanism B of the present invention;

Fig. 10 is a schematic diagram of the C axis of the lifting air bag mechanism of the present invention;

Fig. 11 is a schematic axonometric view of the bottom frame mechanism D of the present invention;

Fig. 12 is an axonometric schematic diagram of the assembly structure of the bottom frame mechanism D, the elbow joint arm mechanism B, and the lifting airbag mechanism C of the present invention;

In the figure: A, lifting platform mechanism, B, elbow joint arm mechanism, C, lifting airbag mechanism, D, bottom frame mechanism, 1, platform, 2, No. 1 upper platform pin assembly, 3, 2 No. upper deck pin assembly, No. 4, No. 1 supporting wheel assembly, No. 5, No. 2 supporting wheel assembly, 6, upper deck pin, 7, pin fixing bolt, 8, lower support arm seat assembly , No. 9, No. 1 upper support arm assembly, No. 10, No. 1 lower support arm assembly, 11. Lower support arm connecting pipe, 12. Cylinder assembly, No. 13, No. 2 upper support arm assembly, No. 14, No. 2 Lower support arm assembly, 15, lower support arm, 16, No. 1 lower support arm pin assembly, 17, No. 2 lower support arm pin assembly, 18, airbag assembly, 19, adapter plate, 20, No. 1 channel steel, No. 21, No. 2 channel steel, 22, No. 3 channel steel, 23, No. 4 channel steel, 24,, rectangular plate, 25, No. 1 guide groove, 26, No. 2 guide groove.

Detailed ways

Refer to Fig. 1, Fig. 2, Fig. 3, Fig. 12, an elbow-joint arm lifting device with no power to lock the apex, the device includes a lifting platform mechanism A, two sets of elbow-joint arm mechanisms B, and a lifting air bag mechanism C and the bottom frame mechanism D, the bottom frame mechanism D is horizontally fixed on the foundation, the two sets of elbow joint arm mechanisms B are fixed on the left and right ends above the bottom frame mechanism D, and the lifting airbag mechanism C The four corners arranged above the bottom frame mechanism D are fixedly connected with the bottom frame mechanism D by bolts; It is fixedly connected with the elbow joint arm mechanism B by bolts, and the upper end of the lifting platform mechanism A and the lifting air bag mechanism (C) is fixed by long bolts.

Referring to Fig. 4, Fig. 5 and Fig. 6, the lifting platform mechanism A includes platform 1, No. 1 upper platform pin assembly 2, No. 2 upper platform pin assembly 3, and No. 1 supporting wheel assembly Body 4 and the No. 2 track roller assembly 5; the No. 1 track roller assembly 4 and the No. 2 track wheel assembly 5 have the same structure, and are symmetrically welded at the middle positions on the left and right sides of the platen 1; Platen 1 is a rectangular plate with holes processed on the outer sides of its left and right sides. The holes run through the rectangular steel on the left and right sides of platen 1. The front and rear positions are symmetrical, and the left and right positions are symmetrical. The holes are concentrically fitted with No. 1 upper platen pins The shaft assembly 2 and the No. 2 upper deck pin assembly 3; the No. 1 upper deck pin assembly 2 and the No. 2 upper deck pin assembly 3 have the same structure, and are fixed by the upper deck pin 6 and pin Composed of bolts 7, the pin shaft 6 of the upper deck is installed in the hole of the deck; the deck 1 and the pin shaft 6 of the upper deck are fixedly connected by the fixing bolt 7 of the pin.

Referring to Fig. 7, Fig. 8 and Fig. 9, the elbow joint arm mechanism B includes the lower support arm seat assembly 8, the No. 1 upper support arm assembly 9, the No. 1 lower support arm assembly 10, the lower support arm connecting Pipe 11, cylinder assembly 12, No. 2 upper support arm assembly 13 and No. 2 lower support arm assembly 14; the No. 1 upper support arm assembly 9 is arranged above No. 1 lower support arm assembly 10 and 1 The No. 1 lower support arm assembly 10 is hinged; the No. 1 lower support arm assembly 10 includes the lower support arm 15, the No. 1 lower support arm pin assembly 16 and the No. 2 lower support arm pin assembly 17; The No. 1 lower support arm pin shaft assembly 16 and the No. 2 lower support arm pin shaft assembly 17 are concentrically arranged at both ends of the lower support arm 15, and the No. 1 lower support arm pin shaft assembly 16 and the No. 2 lower support arm pin shaft assembly are connected by screws. The support arm pin shaft assembly 17 is fixed on the lower support arm 15; wherein the lower support arm connecting pipe 11 is a tubular part, and its two ends are assembled with the No. 1 lower support arm assembly 10 and the No. 2 lower support arm The body 14 is welded symmetrically to realize the synchronous movement of the lower support arm connecting pipe 11 and the No. 1 lower support arm assembly 10 and the No. 2 lower support arm assembly 14; The No. 1 lower support arm pin shaft assembly 16 at the lower end of No. 1 lower support arm assembly 14 is concentrically installed with the lower support arm seat assembly 8 to realize the connection pipe 11 of the lower support rotating arm with the No. 1 lower support arm assembly 10 and the No. 2 support arm assembly. The connecting body of the lower support arm assembly 14 can rotate around the No. 1 lower support arm pin assembly 16; the No. 1 upper support arm assembly 9 and the No. 2 upper support arm assembly 13 are assembled through the No. 2 lower support arm pin shaft The body 17 is concentrically installed to realize that the No. 1 upper support arm assembly 9 and the No. 2 upper support arm assembly 13 can rotate around the pin shaft; the middle of the lower support arm connecting pipe 11 is welded with a steel plate and an ear seat for assembly with the cylinder The piston rods of the body 12 are connected together, and when the lower support arm seat assembly 8 and the fixed support at the lower end of the cylinder assembly are fixed, the cylinder can be rotated at a certain angle around the base, so that the piston rod pushes the lower support arm connecting pipe 11 Rotating at a certain angle around the No. 1 lower support arm pin shaft assembly 16 can quickly and only need a small cylinder thrust to realize the lowering action of the lifting platform.

The elbow-joint arm mechanism of the elbow-joint arm lifting device without power to lock the apex adopts a way of locking around the unstable position of the dead point so that the lifting platform can be stably at the highest position. At this time, the airbag and the All cylinders can stop inflating, which greatly reduces energy consumption and prolongs the service life of airbags and cylinders.

Referring to Fig. 10, the lifting airbag mechanism C includes four airbag assemblies 18 and four adapter plates 19; the upper end surface of the airbag assembly 18 and the lower end surface of the platen 1 are fixed together by long bolts, and the rest The three airbag assemblies are also installed together in contact with the lower end surface of the platen 1 in this way; the adapter plate 19 is arranged at the lower end of the airbag assembly 18 and is fixedly connected with the airbag assembly 18 by bolts; the airbag assembly 18 The lower end is equipped with a ventilation pipeline to facilitate the filling of gas. The elbow arm lifting mechanism adopts the air bag and the cylinder to act on the lifting and lowering, so that the lifting and lowering of the lifting platform can be balanced in force, and it also has a buffering effect.

Referring to Fig. 11 and Fig. 12, the bottom frame mechanism D includes No. 1 channel steel 20, No. 2 channel steel 21, No. 3 channel steel 22, No. 4 channel steel 23, four rectangular plates 24, and No. 1 guide groove 25 And No. 2 guide groove 26; Described No. 1 channel steel 20, No. 2 channel steel 21 structural identical levels are arranged on the longitudinal both sides of bottom frame mechanism D, groove upwards; Described No. 3 channel steel 22,4 No. channel steel 23 is arranged horizontally and laterally symmetrically, with the grooves facing downwards; the No. 1 channel steel 20, No. 2 channel steel 21, No. 3 channel steel 22, and No. 4 channel steel 23 are welded together horizontally and vertically; Four rectangular plates 24 are welded on the four corners of the bottom frame mechanism D, and each two opposite rectangular plates 25 have opposite notches; the No. 1 guide groove 25 and the No. 2 guide groove 26 have the same structure and are welded vertically On the outside of No. 1 channel steel 20 and No. 2 channel steel 21. The No. 1 guide groove 25 is welded side by side on a rectangular steel plate by two channel steels. There is a certain distance between the two channel steels to facilitate the up and down movement of the guide wheels. The flat bottom of the channel steel is vertically welded on the No. 1 channel steel 20 ; The No. 1 roller assembly 4 is installed in the No. 1 guide groove 25, and the No. 2 roller assembly 5 is installed in the No. 2 guide groove 26, ensuring that the No. 1 roller assembly 4 and No. 2 The track roller assembly 5 can slide up and down in the No. 1 guide groove 25 and the No. 2 guide groove 26, and limits the front-back and left-right directions of the lifting platform mechanism A.

The working principle of the elbow arm lift without power locking apex:

Lifting process: the cylinder assembly 12 on both sides and the lifting air bag mechanism C are inflated at the same time, so that the piston rod of the cylinder assembly 12 drives the lower support arm connecting pipe 11 on both sides to move around the lower support arm seat assembly 8. The external rotation drives the No. 1 support arm assembly 9 and the No. 2 upper support arm assembly 13 to drive the lifting platform mechanism A to rise upward. When it reaches the highest position, the four elbows of the elbow joint arm mechanism B The joint is in contact with the installation walls on both sides for compaction, and the center of the contact point is in contact with the No. 1 upper platform pin assembly 2 of the lifting platform mechanism A and the No. 1 lower support arm pin assembly 16 of the elbow joint arm mechanism B. There is a certain distance between the axis line in the horizontal direction, which can make the entire elbow joint arm mechanism B be in the stuck position. At this time, there is no need to inflate the lifting airbag mechanism C and the cylinder assembly 12, and the platen 1 can also be in the locked position. The highest lifting position, keep stable without falling.

Falling process: the cylinder assembly 12 on both sides is inflated in the opposite direction, at this time the piston rod of the cylinder assembly 12 pulls inward the lower support arm connecting pipe 11 on both sides to rotate inwardly around the lower support arm seat assembly 8 , so as to drive the No. 1 support arm assembly 9 and the No. 2 upper support arm assembly 13 to drive the lifting platform mechanism A to descend downward, reaching the No. 1 lower support arm assembly of the lifting platform A and the elbow joint arm mechanism B Body 10 and No. 2 lower support arm assembly 14 are in contact with the extreme position of compaction, that is, the lowest position of falling.

Claims (6)

1. the elbow joint arm lifting device on a unpowered locking summit, it is characterized in that, this device comprises lifting table mechanism (A), two covers elbow joint arm mechanism (B), Lifting air sac mechanism (C) and bottom frame mechanism (D), described bottom frame mechanism (D) is horizontally fixed on ground, two described covers elbow joint arm mechanism (B) are fixed on the two ends, left and right of bottom frame mechanism (D) top, described Lifting air sac mechanism (C) be arranged on bottom frame mechanism (D) top four angles and bottom frame mechanism (D) be bolted to connection, described lifting table mechanism (A) is arranged on elbow joint arm mechanism (B), the top of Lifting air sac mechanism (C) and bottom frame mechanism (D) and elbow joint arm mechanism (B) and is bolted to connection, and described lifting table mechanism (A) is fixed by overbolt with the upper end of Lifting air sac mechanism (C).

2. the elbow joint arm lifting device on a kind of unpowered locking summit according to claim 1, it is characterized in that, described lifting table mechanism (A) comprises platen (1), No. 1 upper platen bearing pin assembly (2), No. 2 upper platen bearing pin assemblies (3), No. 1 caterpillar wheel assembly (4) and No. 2 caterpillar wheel assemblies (5); No. 1 described caterpillar wheel assembly (4) is identical with No. 2 caterpillar wheel assembly (5) structures, is symmetrically welded at platen (1) left and right sides midway location; Described platen (1) is a rectangular plate, about it, the outside of two sides all processes porose, the right and left rectangle steel of platen (1) is run through in this hole, front and back position is symmetrical, right position is symmetrical, and in hole, concentric fit installs No. 1 upper platen bearing pin assembly (2) and No. 2 upper platen bearing pin assemblies (3); No. 1 described upper platen bearing pin assembly (2), No. 2 upper platen bearing pin assembly (3) structures are identical, be made up of upper platen bearing pin (6) and bearing pin bolt of rear end plate (7), upper platen bearing pin (6) is arranged in platen hole; Described platen (1) is fixedly connected with by bearing pin bolt of rear end plate (7) with upper platen bearing pin (6).

3. the elbow joint arm lifting device on a kind of unpowered locking summit according to claim 1, it is characterized in that, described elbow joint arm mechanism (B) comprises lower support arm seat assembly (8), No. 1 upper hold-down arm assembly (9), No. 1 lower support arm assembly (10), lower support pivoted arm adapting pipe (11), cylinder assembly (12), No. 2 upper hold-down arm assemblies (13) and No. 2 lower support arm assemblies (14); Described No. 1 upper hold-down arm assembly (9) is arranged on above No. 1 lower support arm assembly (10) hinged with No. 1 lower support arm assembly (10); No. 1 described lower support arm assembly (10) comprises lower support arm (15), No. 1 lower support arm bearing pin assembly (16) and No. 2 lower support arm bearing pins assembly (17); Described, No. 1 lower support arm bearing pin assembly (16) and No. 2 lower support arm bearing pins assembly (17) are arranged on the two ends of lower support arm (15) with one heart and are fixed on lower support arm (15) by screw by No. 1 lower support arm bearing pin assembly (16) and No. 2 lower support arm bearing pins assembly (17); Wherein said lower support pivoted arm adapting pipe 11 is a kind of tubular members, and its two ends and No. 1 lower support arm assembly (10) and No. 2 lower support arm assemblies (14) are symmetrically welded; Described No. 1 lower support arm bearing pin assembly (16) being arranged on No. 1 lower support arm assembly (10) and No. 2 lower support arm assembly (14) lower ends is installed with lower support arm seat assembly (8) is concentric; No. 1 upper hold-down arm assembly (9) and No. 2 upper hold-down arm assemblies (13) are installed with one heart by No. 2 lower support arm bearing pins assembly (17); Steel plate and ear seat is welded with in the middle of described lower support pivoted arm adapting pipe (11).

4. the elbow joint arm lifting device on a kind of unpowered locking summit according to claim 1, is characterized in that, described Lifting air sac mechanism (C) comprises 4 air bag assemblies (18) and 4 keysetss (19); Described keysets (19) is arranged on air bag assembly (18) lower end and air bag assembly (18) is bolted to connection.

5. the elbow joint arm lifting device on a kind of unpowered locking summit according to claim 1, it is characterized in that, described bottom frame mechanism (D) comprises No. 1 channel-section steel (20), No. 2 channel-section steels (21), No. 3 channel-section steels (22), No. 4 channel-section steels (23), four rectangular plates (24), No. 1 guide groove (25) and No. 2 guide grooves (26); No. 1 described channel-section steel (20), No. 2 identical longitudinal both sides being horizontally set on bottom frame mechanism (D) of channel-section steel (21) structure, groove is upward; No. 3 described channel-section steels (22), No. 4 channel-section steel (23) horizontal cross are symmetrical arranged, and groove down; No. 1 described channel-section steel (20), No. 2 channel-section steels (21), No. 3 channel-section steels (22), No. 4 alternate weld togethers of channel-section steel (23) transverse and longitudinal; Four described rectangular plates (24) are welded on four angles of bottom frame mechanism (D), and every two relative rectangular plates (25) have relative notch; No. 1 described guide groove (25) is identical with No. 2 guide groove (26) structures, be vertically welded in the outside of No. 1 channel-section steel (20), No. 2 channel-section steels (21), No. 1 described caterpillar wheel assembly (4) is arranged in No. 1 guide groove (25), and No. 2 caterpillar wheel assemblies (5) are arranged in No. 2 guide grooves (26).

6. the elbow joint arm lifting device on a kind of unpowered locking summit according to claim 4-5, it is characterized in that, 4 described air bag assemblies (18) and 4 keysetss (19) are arranged on directly over four rectangular plates (25) and are bolted to connection with rectangular plate (25).