CN102299009B - A motor travel switch control mechanism - Google Patents

Abstract

The invention discloses a position switch control mechanism of an electrical machine. The position switch control mechanism comprises a gear case assembly, a position switch, a position adjustment reset block matched with the gear case assembly, and an emergency stop switch. The control mechanism is characterized in that the emergency stop switch and the position adjustment reset block can trigger a position switch contact of the position switch directly and respectively. The position switch control mechanism can realize emergency stop more reliably and control the travel accurately, and is simple in the structure and lower in the manufacturing accuracy and the cost.

Description

A motor travel switch control mechanism

technical field

The invention relates to a motor, in particular to a travel switch control mechanism of the motor.

Background technique

In the lifting mechanism, after the motor is decelerated by the reducer, the output shaft of the reducer is connected to the lifting transmission mechanism, and the object moves up and down through the transmission of the lifting mechanism, and the rising or falling to the required position is generally controlled by the travel switch. That is, the travel of the object is controlled by opening and closing the travel switch.

For example, a lever limit switch disclosed in European Patent Publication No. EP0665361A1, a relatively movable lever device is arranged on the clutch cam, and the lever device is composed of a first lever and a second lever, and the second lever Toggle through the first driving lever, thus the tappet of the touch switch makes the motor stop running, and in an emergency, the tappet can also be touched by the emergency stop switch by means of the driving rod device so that the motor stops running. However, the emergency stop switch needs to use the lever to realize the emergency stop, which reduces the reliability of the emergency stop, and because the lever device is composed of the first lever and the second lever, the shrinkage properties of different plastics are different, and the two levers The separation makes the change of the stroke angle very easy to cause the displacement of the stroke, the structure is relatively complicated, and the manufacturing precision and cost are high.

Contents of the invention

The technical problem to be solved by the present invention is to provide a motor travel switch control structure, which can realize emergency stop more reliably with a simple structure.

The technical solution adopted by the present invention to solve the above technical problems is: a motor stroke switch control mechanism, including a gear box combination, a stroke switch, a stroke adjustment reset block and an emergency stop switch meshed with the gear box combination, which is characterized in that , the emergency stop switch and the stroke adjustment reset block can directly touch the travel switch contacts of the travel switch respectively.

The stroke adjustment reset block is integrated, the stroke adjustment reset block at least includes a first part and a second part, the first part of the stroke adjustment reset block is combined with the gear box, and the stroke adjustment The second part of the adjustment reset shape block is located below the contact of the travel switch. It is used to directly touch the travel switch contact when the travel is limited.

The tappet at one end of the emergency stop switch is passed through the second part of the stroke adjustment reset block and corresponds to the contact position of the travel switch, and the elongated piece at the other end of the emergency stop switch extends to The bottom of the motor casing of the motor makes the emergency stop switch independent of the stroke reset block, and the contact of the travel switch can be directly touched without the help of the stroke adjustment reset block, making the emergency stop more reliable.

The second part of the stroke adjustment reset block is provided with a groove corresponding to the contact position of the stroke switch, and the tappet is passed through the groove.

Preferably, the cross section of the tappet is straight.

Alternatively, a through hole is opened at the position corresponding to the contact position of the travel switch on the second part of the stroke adjustment reset block, and the tappet is passed through the through hole.

Alternatively, the tappet at one end of the emergency stop switch and the second part of the travel reset block are arranged side by side under the contact of the travel switch, so that the emergency stop switch and the travel reset block are independent of each other.

An emergency stop switch hole is opened at the bottom of the motor housing corresponding to the position of the elongated piece.

The gearbox combination includes a first gear in the middle driven by the output shaft of the motor and second gears on both sides meshing with the stroke adjustment reset block, the first gear meshing with the second gear , so that the gear box combination can drive the stroke adjustment reset block to move.

The stroke adjustment reset shape block is rotatably fixed on the motor housing of the motor through a shaft.

Compared with the prior art, the present invention has the advantages that: the emergency stop switch can touch the contacts of the travel switch without the help of the stroke adjustment reset block, making the emergency stop more reliable; since the stroke adjustment reset block is set as an independent One piece, the change error of its travel angle is 0, which improves the precision of the whole switch system and reduces the complexity of manufacturing.

Description of drawings

Fig. 1 is the schematic diagram of motor of the present invention;

Fig. 2 is the front view of the motor housing without front of the motor of the present invention;

Fig. 3 is the rear view of the non-motor housing of the motor of the present invention;

Fig. 4 is the A-A to sectional view of embodiment 1;

Fig. 5 is the A-A to sectional view of embodiment 2;

Fig. 6 is a schematic diagram during emergency stop operation of the travel switch control mechanism of the present invention;

Fig. 7 is a schematic diagram of another embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Referring to Fig. 2 and Fig. 3, a motor travel switch control mechanism includes a motor housing 1, and a left-right symmetrical gear box combination 2 is arranged at the bottom of the motor housing 1, and the first gear 21 in the middle of the gear box combination 2 is connected to the two sides. The second gear 22 meshes. The side of the second gear 22 meshes with the stroke adjustment reset block 4, the stroke adjustment reset block 4 is an independent integral piece, at least includes two parts, the first part 41 is claw-shaped, and meshes with the gear box combination 2, the second The part 42 is substantially horizontal and is located below the stroke adjustment reset block 4 , and the stroke adjustment reset block 4 is rotatably fixed to the motor through the shaft rod 5 .

A travel switch 6 is arranged above the travel adjustment reset block 4, and a protruding travel switch contact 7 is provided at the bottom of the travel switch 6. The second part 42 of the travel adjustment reset block 4 corresponds to a position of the travel switch contact 7. Groove 43, see FIG. 4 . The bottom of the stroke adjustment reset block 4 is provided with an integrated emergency stop switch 8, and the tappet 81 at one end of the emergency stop switch 8 is worn in the groove 43. The elongated piece 82 extends to the bottom of the motor housing 1 . Preferably, the cross-section of the tappet 81 is straight, so that the contact surface is relatively large, and it is not easy to deflect when the travel switch contact 7 is lifted.

Referring to FIG. 1 , the bottom of the motor housing 1 is provided with an emergency stop switch hole 11 at a position corresponding to the elongated piece 82 , through which the elongated piece 82 can be accessed.

Alternatively, the second part 42 of the travel adjustment reset block 4 is provided with a through hole 44 corresponding to the position of the travel switch contact 7. Referring to FIG. Cylindrical. The cross-section of the travel switch contact 7 makes it not completely fall into the groove 43 or the through hole 44, so that the second part 42 can touch the travel switch contact 7 when the travel adjustment reset shape block 4 moves without making the travel switch contact. The point 7 falls into the groove 43 or the through hole 44. Preferably, the travel switch contact 7 and the groove 43 are elongated and crossed, and the length of the travel switch contact 7 is greater than the width of the groove 43, or the travel switch contact The length of 7 is greater than the diameter of the through hole 44 .

Principle of the present invention and working process are as follows:

When the motor is powered on, the output shaft of the motor passes through the first gear 21 to drive the first gear 21 to rotate, thus the second gear 22 rotates. Because the stroke adjustment reset shape block 4 meshes with the second gear 22, the rotation of the second gear 22 drives the stroke adjustment reset shape block 4 to rotate accordingly. When the travel limit point is reached, the second part 42 of the travel adjustment reset shape block 4 touches the travel switch contact 7 at the bottom of the travel switch 6, so that the motor stops. When an emergency occurs, referring to Fig. 6, the elongated piece 82 is moved through the emergency stop switch hole 11 at the bottom of the motor housing 1, so that the tappet 81 of the emergency stop switch 8 protrudes from the groove 43 or the through hole 44 to touch the travel switch contact. Point 7 makes the motor stop rotating; thus, the stroke switch contact 7 can be directly touched by the emergency stop switch 8 without resorting to the stroke adjustment reset block 4 .

Since the stroke adjustment reset block 4 is an independent whole, its stroke angle change error is 0, which improves the precision of the whole switch system and reduces the complexity of manufacturing. Owing to being provided with groove 43 or through hole 44 in stroke adjustment reset shape block 4, emergency stop switch 8 just can touch travel switch contact 7 by stroke adjustment reset shape block 4, makes emergency stop more reliable.

Alternatively, referring to Fig. 7, the difference from the above-mentioned embodiment is that the second part 42' of the stroke adjustment reset block 4' is not provided with a groove or a through hole, and it is compatible with the tappet 81' of the emergency stop switch 8'. They are arranged side by side under the travel switch contacts 7, and can be pushed to the corresponding parts of the travel switch contacts 7 independently. The first part 41' of the stroke adjustment resetting block 4' is still meshed with the second gear 22.

The above description is only a preferred embodiment of the present invention, and it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, various modifications and improvements can be made, which should also be regarded as protection scope of the present invention.

Claims (10)

1. A motor stroke switch control mechanism, comprising a gear box combination (2), a stroke switch (6), a stroke adjustment reset block (4) and an emergency stop switch (8) meshed with the gear box combination (2) , characterized in that the emergency stop switch (8) and the stroke adjustment reset block (4) can directly touch the stroke switch contact (7) of the stroke switch (6) respectively, and the stroke adjustment reset shape The block (4) is integrated, and the stroke adjustment reset block (4) at least includes a first part (41) and a second part (42), and the first part (41) of the stroke adjustment reset block (4) ) meshes with the gear box combination (2), and the second part (42) of the travel adjustment reset block (4) is located below the travel switch contact (7); the emergency stop switch (8 ) the tappet (81) at one end is passed through the second part (42) of the stroke adjustment reset block (4) and corresponds to the position of the stroke switch contact (7), the emergency stop switch (8) The elongated piece (82) at the other end extends to the bottom of the motor casing (1) of the motor. 2. The switch control mechanism according to claim 1, characterized in that, the second part (42) of the stroke adjustment reset block (4) corresponds to the position of the stroke switch contact (7). There is a slot (43), and the tappet (81) is passed through the slot (43). 3. The switch control mechanism according to claim 2, characterized in that, the cross section of the tappet (81) is in-line. 4. The switch control mechanism according to claim 1, characterized in that, the second part (42) of the travel adjustment reset block (4) corresponds to the position of the travel switch contact (7). There is a through hole (44), and the tappet (81) is penetrated in the through hole (44). 5. The switch control mechanism according to any one of claims 1-4, characterized in that an emergency stop switch hole is opened at the bottom of the motor housing (1) corresponding to the position of the elongated piece (82) (11). 6. The switch control mechanism according to any one of claims 1-4, characterized in that, the gearbox combination (2) comprises a middle first gear (21) driven by the output shaft of the motor and The second gear (22) on both sides meshes with the stroke adjustment reset block (4), and the first gear (21) meshes with the second gear (22). 7. The switch control mechanism according to any one of claims 1-4, characterized in that, the stroke adjustment reset block (4) is rotatably fixed on the motor through a shaft (5). 8. A motor stroke switch control mechanism, comprising a gear box combination (2), a stroke switch (6), a stroke adjustment reset block (4') meshed with the gear box combination (2) and an emergency stop switch (8 '), characterized in that the emergency stop switch (8') and the travel adjustment reset block (4') can directly touch the travel switch contact (7) of the travel switch (6) respectively, the The stroke adjustment reset block (4') is integral, and the stroke adjustment reset block (4') at least includes a first part (41') and a second part (42'), and the stroke adjustment reset block (4 ') The first part (41') is engaged with the gearbox combination (2), and the second part (42') of the stroke adjustment reset block (4') is located at the travel switch contact (7) below: the tappet (81') at one end of the emergency stop switch (8') and the second part (42') of the stroke reset block (4') are arranged side by side on the stroke switch below the contacts (7). 9. The switch control mechanism according to claim 8, characterized in that, the gear box combination (2) comprises a middle first gear (21) driven by the output shaft of the motor and two sides connected to the The stroke is adjusted by the second gear (22) engaged with the resetting block (4), and the first gear (21) is engaged with the second gear (22). 10. The switch control mechanism according to claim 8, characterized in that the stroke adjustment reset block (4) is rotatably fixed on the motor through a shaft (5).