CN2874173Y

CN2874173Y - Safety lock rod mechanism for cut-off valve

Info

Publication number: CN2874173Y
Application number: CN 200520099315
Authority: CN
Inventors: 周锐; 韦刚; 黄宇; 林家平
Original assignee: LIUZHOU HUALI INDUSTRY Co Ltd
Current assignee: LIUZHOU HUALI INDUSTRY Co Ltd
Priority date: 2005-12-07
Filing date: 2005-12-07
Publication date: 2007-02-28
Anticipated expiration: 2015-12-07

Abstract

This utility model relates to a safe locking bar mechanism for the shut-off valve, which belongs to the technical field of accessories for construction machineries and comprises a handle, a shut-off valve, a base, a rotation transmission unit consisted of the shut-off board, a thorn board and a support as well as the locking mechanism composed of an air spring and an extension spring. One end of the support is fixed to the base via the rotor axis of fixing base and can be revolved around the latter; the operating handle is fixed to the left supporting board via the rotor axis of support and can be revolved around the latter; the shut-off board is fixed at the lower section of right supporting board; the fixing pin shaft is fixed in the fixing support; the fixing end of the thorn board is fixed in the rotor axis of support; the right angle arc groove at the movable end of the thorn board passes through the fixing pin shaft and can be moved along the latter; the shut-off valve is fixed to the fixing base via the supporting board of shut-off valve; one end of the air spring in the locking mechanism is fixed to the fixing base; another end of the air spring is fixed at the upper section of the left supporting board; one end of the extension spring is fixed at the middle of thorn board; another end of the extension spring is fixed at the upper section of the left supporting board. This utility model has the advantages of simple operation, reliable action and excellent safety performance.

Description

The cut-off valve safety lock rod mechanism

Technical field:

The utility model relates to a kind of building machinery accessory, particularly a kind of cut-off valve safety lock rod mechanism.

Background technique:

The movement arm of general heavy construction machinery as: the action of the digging arm of excavator or the shear leg of hoist is controlled startup by cut-off valve, for guaranteeing the reliable and Safety performance of contact, general cut-off valve all should dispose a safe locking mechanism, connects during work, disconnects when not working.But what existing mechanical adopted is to realize that by the cam mechanism of the additional tool with lock of a cover complex structure and locking are not firm.

The model utility content:

The technical problems to be solved in the utility model is: provide a kind of cut-off valve safety lock rod mechanism of simple in structure, reliable in action, with the existing complex structure of locking framework and the not firm problem of locking of the movement arm cut-off valve that solves existing heavy construction machinery.

The technological scheme that solves the problems of the technologies described above is:

A kind of cut-off valve safety lock rod mechanism, comprise operating grip, cut-off valve, fixed bearing, it is characterized in that: it also has rotating transmission device, locking framework, described rotating transmission device is by the break-make plate, sour jujube plate and by left and right sides supporting plate, the support that rack connecting plate constitutes is formed, described locking framework is by pneumatic spring, extension spring is formed, the two ends that one end of left and right sides supporting plate lays respectively at the fixed bearing rotating shaft are fixed on the fixed bearing by Bolt Connection and can rotate around the rotating shaft of support fixed bearing, operating grip is fixed on the left socle plate by rack shaft and can rotates around rack shaft, the break-make plate is fixed on right support plate bottom, fixed pin shaft is fixed on the fixed bearing, the fixed end of sour jujube plate is fixed on the rack shaft, the right angle type arc-shaped slot of its movable end passes fixed pin shaft, and can move along fixed pin shaft, cut-off valve is fixed on the bearing and close right support plate one side by the cut-off valve support plate, one end of the pneumatic spring motion bar of locking framework is fixed on the fixed bearing by fixing pin I, and can rotate around fixing pin I, the other end is fixed on left socle plate top by fixing pin II, extension spring one end is fixed on sour jujube plate middle part, and the other end is fixed on left socle plate middle and upper part.

Owing to adopt said structure, the cut-off valve safety lock rod mechanism of the utility model is compared with the cam cut-off valve safe locking mechanism of original tool with lock, has advantage simple in structure, reliable in action, this is because the cut-off valve safety lock rod mechanism of the utility model forms lock out action by each moving link that retrains mutually interlock, thereby safe and reliable.

Below, the technical characteristics to the cut-off valve safety lock rod mechanism of the utility model is further described in conjunction with the accompanying drawings and embodiments.

Description of drawings:

Fig. 1～Fig. 3: the cut-off valve safety lock rod mechanism overall structure schematic representation (stereogram, cut-off valve are in opening state) of the utility model:

Fig. 1-remove supporting plate 72, Fig. 2, Fig. 3-remove supporting plate 71;

Fig. 4: (remove supporting plate 72, support is in rotary state to the cut-off valve safety lock rod mechanism structural representation of the utility model, and cut-off valve is in on-state (in the process);

Fig. 5: the cut-off valve safety lock rod mechanism structural representation (support is in the lock state, and cut-off valve is in on-state) of the utility model;

Fig. 6: the sour jujube plate structure schematic representation of the cut-off valve safety lock rod mechanism of the utility model.

Among the figure:

The 1-handle, 2-pneumatic spring, 3-break-make plate, the 4-cut-off valve, 5-sour jujube plate, 51-sour jujube plate fixed end circular hole, 52-right angle type arc-shaped slot, first section of 521-right angle type arc-shaped slot, second section of 522-right angle type arc-shaped slot, the 6-rack shaft, the 7-support, 71,72-left and right sides supporting plate, 73,74, the 75-rack connecting plate, the rotating shaft of 8-fixed bearing, the 9-fixed pin shaft, 10-extension spring, 11-fixed bearing, 12-cut-off valve support plate, the 13-bolt, 14-fixing pin I, 15-fixing pin II, the fixed end G of G-sour jujube plate 5, the movable end of H-sour jujube plate 5.

Embodiment:

A kind of cut-off valve safety lock rod mechanism, comprise operating grip 1, cut-off valve 4, bearing 11, rotating transmission device, locking framework, described rotating transmission device is by break-make plate 3, sour jujube plate 5 and by left and right

sides supporting plate

71,72, connect left and right

sides supporting plate

71,72

rack connecting plate

73,74,75 supports that constitute 7 are formed, described locking framework is by pneumatic spring 2, extension spring 10 is formed, left and right sides supporting plate 71, the two ends that an end of 72 lays respectively at fixed bearing rotating shaft 8 are connected and fixed on fixed bearing 11 by bolt 13 and can rotate around fixed bearing rotating shaft 8, operating grip 1 is fixed on the left socle plate 71 by rack shaft 6 and can rotates around rack shaft 6, break-make plate 3 is fixed on right support plate 72 bottoms, fixed pin shaft 9 is fixed on the fixed bearing 11, the circular hole 51 of the fixed end G end of sour jujube plate 5 passes rack shaft 6 and is fixed on the rack shaft 6, the right angle type arc-shaped slot 52 of its movable end H passes bearing pin 9, and can move along bearing pin 9, cut-off valve 4 is fixed on the fixed bearing 11 near right support plate 72 1 sides by cut-off valve support plate 12, one end of pneumatic spring 2 motion bars of locking framework is fixed on the fixed bearing 11 by fixing pin I-14, and can rotate around fixing pin I-14, the other end is fixed on left socle plate 71 tops by fixing pin II-15, extension spring 10 1 ends are fixed on sour jujube plate 5 middle parts, and the other end is fixed on left socle plate 71 middle and upper parts.

Course of action:

As Fig. 1, Fig. 2, shown in Figure 3, when handle 1 lifts, overcome the resistance of extension spring 10, handle 1 drives sour jujube plate 5 and rotates around rack shaft 6, sour jujube plate 5 moves at the constraint lower edge of fixed pin shaft 9 sour jujube plate arc groove simultaneously, when moving to first section arc groove of sour jujube plate 5, pneumatic spring 2 rotates with support 7 swings and around fixing pin I, pneumatic spring 2 is opened, under pneumatic spring 2 thrusts, support 7 rotates around fixed bearing rotating shaft 8, drives break-make plate 3 and separates (referring to Fig. 1) with cut-off valve 4, cut-off valve 4 is opened, circuitry is in off state, when pneumatic spring 2 is opened to long status, and pneumatic spring 2 supporting brackets 7, this moment, entire mechanism was in steady state, (referring to Fig. 1, Fig. 2, Fig. 3); When handle 1 is depressed, driving sour jujube plate 5 rotates, sour jujube plate 5 drives support 7 and rotates around fixed bearing rotating shaft 8 under the effect of contraction of fixed pin shaft 9, pneumatic spring 2 rotates around fixing pin I-14 simultaneously, pneumatic spring 2 compressions, support 7 drives break-make plate 3 and presses cut-off valve 4, make circuitry be in (referring to Fig. 4) in the connection process, when handle 1 forwards minimum point to, that is: bearing pin 9 is in the end (referring to Fig. 5) of second section arc groove of sour jujube plate 5, decontrol handle 1, this moment under the active force of extension spring 10, the position relative fixed of sour jujube plate 5 (referring to Fig. 6) and fixed pin shaft 9, pneumatic spring 2 is locked, cut-off valve 4 constant connections are excavated function and are carried out work at any time.

Claims

1, a kind of cut-off valve safety lock rod mechanism, comprise operating grip (1), cut-off valve (4), fixed bearing (11), it is characterized in that: it also has rotating transmission device, locking framework, described rotating transmission device is by break-make plate (3), sour jujube plate (5) and by left and right sides supporting plate (71,72), rack connecting plate (73,74,75) support of Gou Chenging (7) is formed, described locking framework is by pneumatic spring (2), extension spring (10) is formed, left and right sides supporting plate (71,72) two ends that a end lays respectively at fixed bearing rotating shaft (8) are connected and fixed by bolt (13) and go up and can rotate around support fixed bearing rotating shaft (8) at fixed bearing (11), operating grip (1) is fixed on left socle plate (71) by rack shaft (6) and goes up and can rotate around rack shaft (6), break-make plate (3) is fixed on right support plate (72) bottom, fixed pin shaft (9) is fixed on the fixed bearing (11), the fixed end (G) of sour jujube plate (5) is fixed on the rack shaft (6), the right angle type arc-shaped slot (52) of its movable end (H) passes fixed pin shaft (9), and can move along fixed pin shaft (9), cut-off valve (4) is fixed on bearing (11) by cut-off valve support plate (12) and goes up also near right support plate (72) one sides, one end of the pneumatic spring of locking framework (2) motion bar is fixed on the fixed bearing (11) by fixing pin I (14), and can rotate around fixing pin I (14), the other end is fixed on left socle plate (71) top by fixing pin II (15), extension spring (10) one ends are fixed on sour jujube plate (5) middle part, and the other end is fixed on left socle plate (71) middle and upper part.