CN2600312Y

CN2600312Y - Driver's cab hydraulic tilting apparatus

Info

Publication number: CN2600312Y
Application number: CN 02279279
Authority: CN
Inventors: 刘光荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-09-20
Filing date: 2002-09-20
Publication date: 2004-01-21
Anticipated expiration: 2012-09-20

Abstract

A hydraulic-pressure overturn apparatus in cab comprises a lifting cylinder, a slide slot, a ratchet bar, a pallet, a lifting and declining position-limiting switch. The slide slot connected at the lifting cylinder, the ratchet bar is connected with the piston rod of the lifting cylinder and is also arranged in the slide slot, the lifting and declining position-limiting switch is respectively arranged at the lifting cylinder body opposite to the respective contact plate. The utility model is characterized in that the slide slot is connected with a support, an auxiliary cylinder and a reset mechanism are arranged adjacently on the support in order, the pallet is hinged in the support, the root of the support is extended into the cavity of the reset mechanism, one side of support contacts with an ejecting rod that a reset spring is sleeved on, the other side of the support contacts with the piston rod of the auxiliary cylinder; the auxiliary cylinder is a single-directional cylinder, the oil way of the auxiliary cylinder is connected with the falling oil way of the lifting cylinder. For the improved hydraulic pressure overturn apparatus, all motion members are located in the cavity, avoiding the brushing of the spattered mud and sand when driving, the pallet is to realize the swing depending on the advance and retreat of the piston rod and the ejection rod and has stable reliable action, moreover the structure of the utility model is more compact, completely avoiding the failure of the mechanism due to external corrosion damage.

Description

Operator's compartment hydraulic overturn device

One, technical field

The utility model relates to this device of preceding turning-up devices, particularly fluid pressure type of cab over type automobile cab.

Two, technical background

Use a kind of operator's compartment hydraulic overturn device on the cab over type automobile now, its structure is seen Fig. 4: be articulated on the piston rod 3 of the elevating ram 6 on the vehicle body and be associated with ratchet bar 2, ratchet bar is positioned in the chute 19 on the elevating ram cylinder body, the top of ratchet bar and operator's compartment base plate 1 are hinged, on the cylinder body of elevating ram 6, be hinged with the ratchet 10 of band return spring 11, ratchet links to each other with the operating handle 17 of change-over valve 16 by steel wire 15, the output of driver's cab turnover oil pump inserts the rising oil circuit C and the decline oil circuit D of elevating ram 6 respectively by change-over valve 16, oil circuit with the hydraulic pressure lock bolt 18 of operator's compartment base plate and vehicle body locking inserts rising oil circuit C.

The handle 17 of the moving change-over valve of plate, the rising oil circuit C oil-feed of elevating ram, hydraulic pressure lock bolt 18 is opened simultaneously, exercise the upset forward gradually of operator's compartment base plate on the ratchet bar 2, when driver's cab turnover puts in place, rising limit switch 5 stops pump fuel feed, and spring 11 makes ratchet 10 stick into ratchet bar 2, and the ratchet bar that is positioned turns over state before operator's compartment reliably is in.

Buck Plate fixed handle 17, steel wire 15 make ratchet overcome spring force and withdraw from ratchet bar, simultaneously, decline oil circuit D oil-feed, ratchet band base plate 1 return, the back decline limit switch 4 that puts in place stops pump fuel feed, and the return spring in the lock bolt 18 is locked operator's compartment base plate and vehicle body again.

In the said structure, steel wire, ratchet and return spring thereof, it all is certain position that exposes under vehicle bridge, the muddy water that automobile splashes in motion, sandstone are all directly played brush in the above, under the long-term rugged environment like this, make steel wire, ratchet and the return spring thereof of generation interlocking action become rusty easily extremely, rupture, be out of shape, make this mechanism occur operating malfunctioning.

Three, summary of the invention

The purpose of this utility model is that above-mentioned operator's compartment hydraulic overturn device is improved, the muddy water that splashes when making this mechanism avoid running car, sandstone play brush, thereby avoid this mechanism owing to the operation that corrosion, fracture and distortion cause is malfunctioning.

Above-mentioned purpose is to be achieved with following technical scheme: remove steel wire, be connected in connection one support on the chute of elevating ram, device is close to along row on the support auxiliary oil cylinder and Bringing-back mechanism, ratchet is hinged in the support, its root stretches in the cavity of Bringing-back mechanism, one side contacts wherein is with the push rod of return spring, the piston rod of opposite side Contact Pair oil cylinder; Auxiliary oil cylinder is unidirectional oil cylinder, and its oil circuit links to each other with the decline oil circuit of elevating ram.

When the moving change-over valve handle of plate makes the ratchet bar return, the decline oil circuit oil-feed of elevating ram, this moment since the working resistance of auxiliary oil cylinder less than elevating ram, thereby its piston at first moves ahead, the promotion ratchet overcomes the spring force rotation that acts on push rod and withdraws from ratchet bar, then, ratchet bar begins return, after putting in place, the decline limiting device stops fuel feeding, and return spring promotes push rod makes ratchet rotate back into original position again.

Operator's compartment hydraulic overturn device after the improvement, action piece all is positioned within the cavity, muddy water that has splash when having avoided running car and sandstone play brush, ratchet leans on piston rod and push rod to advance and retreat each other and realizes swing, move reliable and stable, and texture ratio was more compact in the past, avoided fully this mechanism owing to extraneous corrosion failure cause malfunctioning.

Four, description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is that the P of Fig. 1 is to enlarged drawing;

Fig. 3 is the utility model hydraulic schematic diagram;

Fig. 4 is this structural scheme of mechanism before improving.

Five, embodiment

Below in conjunction with Fig. 2 improvements are described further.

Empty support 13 in welding has on chute 19,9 times welding of auxiliary oil cylinder oil cylinder props up drives 8, cylinder bracket 8 is set in support 13 1 ends, the oil inlet of auxiliary oil cylinder links to each other with the decline oil circuit D of elevating ram 6, Bringing-back mechanism is by tubular cavity 7, push rod 12 and the return spring 11 and the reset cradle 14 that are enclosed within on the push rod are formed, has the opening that stretches into and swing for ratchet on the stack shell of cavity 7, the external diameter of stack shell is consistent with the cylinder body external diameter of auxiliary oil cylinder 9 substantially, cavity welds mutually with reset cradle 14, at the bottom of the push rod 12 that is with return spring 11 stretches out in the tube tin, reset cradle 14 is set in the other end of support 13, its direction is the piston rod of the nozzle of cavity 7 facing to auxiliary oil cylinder 9, and its end face is adjacent to the end face of auxiliary oil cylinder 9, ratchet 10 is hinged on the interior aerial of support 13, ratchet 10 has long root, the one side is an arc surface, opposite side is the plane, the root of ratchet stretches in the cavity 7 from the opening part on the stack shell of Bringing-back mechanism cavity 7, the plane of its arc surface one side contacts push rod 12, the piston rod bulb end of its plane one side contacts auxiliary oil cylinder 9.

Claims

1. operator's compartment hydraulic overturn device, comprise elevating ram, chute, ratchet bar, ratchet, and rise, the limit switch that descends, chute is connected on the elevating ram, the piston rod of ratchet bar and elevating ram links, and be positioned in the chute, rise, the decline limit switch is installed on the elevating ram cylinder body and opposite position its contact separately respectively, it is characterized in that, on chute, be connected with a support, auxiliary oil cylinder and the Bringing-back mechanism be close to along row are housed on the support, ratchet is hinged within the described support, its root stretches in the cavity of Bringing-back mechanism, and a side contacts wherein is with the push rod of return spring, the piston rod of opposite side Contact Pair oil cylinder; Auxiliary oil cylinder is unidirectional oil cylinder, and its oil circuit links to each other with the decline oil circuit of elevating ram.

2. according to the operator's compartment hydraulic overturn device of claim 1, it is characterized in that, described Bringing-back mechanism is by the tubular cavity, push rod and the return spring and the reset cradle that are enclosed within on the push rod are formed, has the opening that stretches into and swing for ratchet on the stack shell of cavity, the external diameter of stack shell is consistent with the cylinder body external diameter of auxiliary oil cylinder, and cavity links to each other with reset cradle, at the bottom of the push rod that is with return spring stretches out in the cavity tube tin.

3. according to the operator's compartment hydraulic overturn device of claim 1, it is characterized in that described ratchet has long root, the one side is an arc surface, opposite side is the plane, the plane of its arc surface one side contacts push rod, the piston rod bulb end of its plane one side contacts auxiliary oil cylinder.