CN114141559A - Mechanical interlocking mechanism for electric reversing switch - Google Patents

Abstract

The invention discloses a mechanical interlocking mechanism for an electric reversing switch. The mechanism is used for a mining explosion-proof electric phase change switch and comprises a track assembly, a main lead screw assembly, a clutch pull rod, an auxiliary lead screw assembly, a intermittent wheel cam assembly, an intermittent wheel concave wheel assembly, a main control rack assembly, an auxiliary control rack assembly, a head raising clamping assembly, a chain and the like. The invention can fix the operation logic relation among the main control crank, the clutch pull rod and the auxiliary control crank, and avoids the possibility of misoperation, thereby greatly reducing the probability of machine damage and operator injury.

Description

Mechanical interlocking mechanism for electric reversing switch

Technical Field

The invention relates to the technical field of coal mine machinery, in particular to a mechanical interlocking mechanism for an electric reversing switch.

Background

At present, a mining electric phase change switch has two working states, one is a conventional working state, and the other is a debugging state for debugging a weak current control module without driving a lower motor to operate. The debugging state is entered from the conventional state, and the operator operates the main control crank, the clutch pull rod and the auxiliary control crank in a specific sequence. However, the three parts move relatively independently, no corresponding mechanism is used for restricting the interlocking relation, the operator is easy to operate mistakenly, and once an accident happens during the misoperation, the machine can be damaged, and the serious consequences of personnel injury can be caused. Therefore, the mechanism which can fix the operation logic relation among the three mechanisms of the main control crank, the clutch pull rod and the auxiliary control crank and avoid the possibility of misoperation becomes a technical difficulty and a key point.

Disclosure of Invention

The invention aims to provide a mechanical interlocking mechanism for an electric reversing switch, so that three sets of relatively independent moving components have an interlocking logical relationship, and the possibility of misoperation is avoided.

The purpose of the invention is realized by the following technical scheme:

the mechanism comprises a track assembly, a main screw rod assembly, a clutch pull rod, an auxiliary screw rod assembly, a intermittent wheel cam assembly, an intermittent wheel concave wheel assembly, a main control rack assembly, an auxiliary control rack assembly, a head raising clamping assembly and a chain, wherein the track assembly consists of a fixed plate, a display window, a sliding track and a roller chain inertia wheel; the main lead screw component consists of a main lead screw, a crank and a chain wheel; the clutch pull rod assembly consists of a handle, a transmission rod and a clamping shifting fork; the auxiliary lead screw component consists of an auxiliary lead screw, a crank and a gear; the intermittent wheel cam component consists of an intermittent wheel cam and a chain wheel; the intermittent wheel concave wheel component consists of an intermittent wheel concave wheel and a gear; the main control rack assembly consists of a main control rack, a position indicating needle and a clamping block; the auxiliary control rack assembly consists of a rack, a position clamping block and a head raising clamping block; the head raising clamping component consists of a head raising clamping device, an extension spring and a positioning pin.

2, the fixing plate and the track assembly are fixed inside the outer box body, and the main lead screw assembly and the auxiliary lead screw assembly are arranged on the outer box body through bearings and can rotate; the clutch pull rod assembly is arranged on the outer box body and can be pulled and can not rotate; the intermittent wheel cam assembly and the intermittent wheel concave wheel assembly are positioned on the fixed plate and can rotate; the main control rack assembly and the auxiliary control rack assembly are arranged in the sliding track and can slide; the head raising clamping component is arranged on the fixing plate and can carry out head raising action through a rotating shaft of the head raising clamping component; the chain connects the sprocket and the sprocket.

3 furthermore, the main lead screw component drives the intermittent wheel cam component through a chain, and the transmission ratio is one to one.

And 4, the intermittent wheel cam assembly is meshed with the intermittent wheel concave wheel assembly, the intermittent wheel concave wheel assembly intermittently rotates for a quarter of a circle every time the intermittent wheel cam assembly rotates for one circle, and the transmission ratio is one to four.

5 further, the clamping fork can only pass through the groove of the main control rack in the eighth circle to perform drawing action, and is clamped through the main control rack in the non-eighth circle.

Further, before the clutch pull rod assembly is pulled, the groove of the auxiliary control rack is clamped with the clamping shifting fork, and the grooves of the main control rack and the auxiliary lead screw are also clamped for double clamping; after the clutch pull rod assembly is pulled, the main control rack is clamped with the groove of the auxiliary lead screw.

The invention has the following beneficial effects:

the complete mechanism limits the movement among the main screw rod assembly, the clutch pull rod assembly and the auxiliary screw rod assembly, so that three sets of relatively independent movement assemblies have an interlocking logical relationship, and the uniqueness of operation is determined. The mechanism avoids the possibility of misoperation, thereby greatly reducing the probability of machine damage and operator injury.

Description of the drawings:

FIG. 1 is a three-dimensional general view of the mechanism (0 circle position)

FIG. 2 is a three-dimensional general view reverse side of the mechanism (0 ring position)

FIG. 3 is a three-dimensional general view reverse side of the mechanism (8-ring position, no operation clutch and auxiliary screw)

FIG. 4 is a three-dimensional general view reverse side of the mechanism (8-ring position, operation clutch and auxiliary screw)

FIG. 5 track assembly

FIG. 6 shows a spindle screw assembly, a clutch-pull rod assembly, and an auxiliary screw assembly

Figure 7 geneva wheel cam assembly and geneva wheel pocket wheel assembly

Fig. 8 master rack component (front)

FIG. 9 auxiliary rack assembly (front and back)

FIG. 10 head-up detent assembly

In the figure: 10. the chain wheel type hydraulic lifting device comprises a rail assembly, 11, a fixed plate, 12, a display window, 13, a sliding rail, 14, a roller chain idler wheel, 20, a main screw rod assembly, 21, a main screw rod, 22, a crank, 23, a chain wheel, 30, a clutch pull rod assembly, 31, a handle, 32, a transmission rod, 33, a clamping fork, 40, an auxiliary screw rod assembly, 41, an auxiliary screw rod, 42, a crank, 43, a gear, 50, a intermittent wheel cam assembly, 51, an intermittent wheel cam, 52, a chain wheel, 60, an intermittent wheel concave wheel assembly, 61, an intermittent wheel concave wheel, 62, a gear, 70, a main rack assembly, 71, a main rack, 72, a position indicating pin, 73, 80, an auxiliary control rack assembly, 81, a rack, 82, a position clamping block, 83, a head lifting clamping block, 90, a head lifting clamping assembly, 91, a head lifting clamping block, 92, a tension spring, 93, a positioning pin and 100.

The specific implementation mode is as follows:

according to fig. 1-10:

the fixing plate 11 and the rail assembly 10 are mounted on the outer case by bolts, and the main screw bar assembly 20 and the sub screw bar assembly 40 are rotatably mounted on the outer case. The clutch lever assembly 30 is mounted on the outer housing and is non-rotatable by pulling. The geneva wheel pocket wheel assembly 60 and the geneva wheel cam assembly 50 are rotatably positioned on the main plate. The master rack assembly 70 and the slave rack assembly 80 are slidably mounted in the sliding track. The head-up clamping component 90 is arranged on the main board and can perform head-up action through a rotating shaft of the head-up clamping component. Chain 100 connects two 18-tooth sprockets.

Under the normal working condition of the mechanism 2, the main lead screw 21 drives the 18-tooth chain wheel 23 by the counterclockwise rotation of the crank 22, and the chain 100 transmits the motion to the intermittent wheel cam assembly 50 one by one. For every counterclockwise rotation of the geneva wheel cam assembly 50, the geneva wheel pocket assembly 60 rotates one tooth, i.e., one quarter of a turn, clockwise, and the 1.5-die 15-tooth gear drives the master rack assembly 70 to move 17.7 mm. The position indication of the position indicator 72 on the glass dial can be from 0 to 212 mm. Through scale marking, the current number of turns of the main lead screw 21 can be displayed.

3 the main control crank rotates anticlockwise and rotates from 0 circle to 12 circles, except the eighth circle, the grooves of the clamping shifting forks 33 are clamped in the main control rack 71 and cannot be stretched outwards. The groove of the auxiliary lead screw 41 is clamped in the main control rack 71; the position block 82 of the secondary rack assembly 80 is recessed to block the position block fork 33 therein, and the secondary rack 81 is engaged with the gear of the secondary screw assembly 40. Under the action of the double-bumper, the sub-bumper assembly 40 cannot rotate.

4 when the spindle screw assembly 20 rotates anticlockwise to the eighth circle, the position indicator 72 indicates the eighth circle, when the moving distance of the main control rack assembly 20 is 141.3mm, the clutch pull rod assembly 30 is pulled outwards by 15mm, and the notch on the main control rack 71 can accommodate the position shifting fork to pass through. After the rotation, the position shifting fork clamps the clamping block 73 of the main control rack 71, so that the main control rack cannot rotate anticlockwise continuously; the groove of the position clamping block 82 of the auxiliary rack assembly 80 is separated from the position shifting fork, so that the movement limitation of the auxiliary rack assembly 80 is relieved.

5, since the auxiliary control rack assembly 80 is meshed with the auxiliary lead screw assembly 40 through the 1.5-die 15-tooth gear, the rotation limitation of the auxiliary lead screw assembly 40 is released after the clutch pull rod is stretched at the eighth turn position. The secondary screw assembly 40 is rotated clockwise for 2 revolutions. In the process, the stopper 91 of the head-up stopper assembly 90 contacts the head-up stopper 83 of the secondary control rack assembly 80, and the positioning pin 93 on the stopper 91 enters the circular hole of the main control rack 71, so that the main lead screw assembly 20 of the main control rack 71 is limited in movement. After 2-cycle clockwise rotation, the auxiliary control rack assembly 80 moves 141.3mm, the head-up fixture block 83 falls down, and the positioning pin 93 automatically retracts through the extension spring 92, so that the movement limitation of the main control rack assembly 70 and the main lead screw assembly 20 is removed.

6 the main crank 22 needs to be rotated clockwise from the eighth turn to the 0 position for the low voltage test of the integral switch. In the process, the main control rack 71 moves, the opening on the main control rack is staggered with the clutch pull rod 30, and the movement of the clutch pull rod 30 is limited; the semicircular gap below the main control rack 71 moves and is staggered with the semicircular gap of the auxiliary main shaft, so that the rotation of the auxiliary main shaft is limited.

Claims (6)

1. A mechanical interlock mechanism for an electrically operated reversing switch, comprising: the mechanism comprises a track assembly (10), a main lead screw assembly (20), a clutch pull rod (30), an auxiliary lead screw assembly (40), a intermittent wheel cam assembly (50), an intermittent wheel concave wheel assembly (60), a main control rack assembly (70), an auxiliary control rack assembly (80), a head raising clamping assembly (90) and a chain (100);

the track assembly (10) consists of a fixing plate (11), a display window (12), a sliding track (13) and a roller chain idler wheel (14);

the main screw component (20) consists of a main screw (21), a crank (22) and a chain wheel (23);

the clutch pull rod assembly (30) consists of a handle (31), a transmission rod (32) and a clamping shifting fork (33);

the auxiliary screw rod component (40) consists of an auxiliary screw rod (41), a crank (42) and a gear (43);

the intermittent wheel cam assembly (50) consists of an intermittent wheel cam (51) and a chain wheel (52);

the intermittent wheel concave wheel assembly (60) consists of an intermittent wheel concave wheel (61) and a gear (62);

the master control rack assembly (70) consists of a master control rack (71), a position indicating needle (72) and a clamping block (73);

the auxiliary control rack assembly (80) consists of a rack (81), a position fixture block (82) and a head-up fixture block (83);

the head raising clamping component (90) consists of a head raising clamping device (91), an extension spring (92) and a positioning pin (93).

2. A mechanical interlock mechanism for an electrically operated reversing switch according to claim 1, wherein the fixing plate and rail assembly (10) is fixed inside an outer case, and the main screw bar assembly (20) and the auxiliary screw bar assembly (40) are rotatably mounted on the outer case through bearings; the clutch pull rod assembly (30) is arranged on the outer box body and can be pulled and can not rotate; the intermittent wheel cam assembly (50) and the intermittent wheel concave wheel (60) assembly are positioned on the fixing plate (11) and can rotate; the main control rack assembly (70) and the auxiliary control rack assembly (80) are arranged in the sliding track (13) and can slide; the head raising clamping component (90) is arranged on the fixing plate (11) and can carry out head raising action through a rotating shaft of the head raising clamping component; a chain (100) connects the sprocket (23) and the sprocket (52).

3. A mechanical interlock mechanism for an electrically operated reversing switch according to claim 1, characterized in that the main lead screw assembly (20) drives the geneva wheel cam assembly (50) via a chain (100) with a one to one ratio.

4. A mechanical interlock mechanism for an electrically operated reversing switch according to claim 1, wherein the geneva wheel cam assembly (50) and the geneva wheel well assembly (60) are in meshing engagement, the geneva wheel well assembly (60) being intermittently rotated one quarter of a revolution for each revolution of the geneva wheel cam assembly (50) and the transmission ratio being one to four.

5. A mechanical interlock mechanism for an electrically operated reversing switch according to claim 1, characterized in that the detent fork (33) can only be pulled through the groove of the master rack (71) in the eighth turn and can be locked by the master rack in the case of a non-eighth turn.

6. The mechanical interlocking mechanism for the electric reversing switch is characterized in that before the clutch pull rod assembly (30) is pulled, the groove of the auxiliary control rack (81) is clamped with the clamping fork (33), and the main control rack (71) and the groove of the auxiliary lead screw (41) are also clamped, so that double clamping is realized; after the clutch pull rod assembly (30) is pulled, the main control rack (71) is clamped with the groove of the auxiliary screw rod.

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