CN217453216U - Speed monitoring device for special machine tool rotating shaft - Google Patents
Speed monitoring device for special machine tool rotating shaft Download PDFInfo
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- CN217453216U CN217453216U CN202222071811.3U CN202222071811U CN217453216U CN 217453216 U CN217453216 U CN 217453216U CN 202222071811 U CN202222071811 U CN 202222071811U CN 217453216 U CN217453216 U CN 217453216U
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- 238000001514 detection method Methods 0.000 claims abstract description 13
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- 238000013459 approach Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 6
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- 238000003754 machining Methods 0.000 description 5
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- 239000002184 metal Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
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Abstract
The utility model discloses a speed monitoring device for a special machine tool rotating shaft; the device includes the main motor that is used for driving the lathe main shaft, establishes belt pulley on main motor output shaft, establishes the scram switch on the lathe, and the device still includes: the speed detection device is arranged between the main motor and the belt pulley, the speed monitor is electrically connected with the speed detection device, and the safety relay is electrically connected with the speed monitor; the power output end of the safety relay is connected into a main control loop used for controlling the action of the main motor, and the emergency stop switch is connected between the safety relay and the speed monitor. The utility model discloses combine together artifical scram operation and automated inspection control, can realize unusual automated inspection of lathe main motor output speed and automatic control.
Description
Technical Field
The utility model belongs to the technical field of the machine tool production and processing, concretely relates to a speed monitoring device for special machine tool rotation axis.
Background
At present, common machine tool equipment is applied to various machining industries, the workshop environment is quite complex, and the machining quality and the machining safety are difficult to effectively ensure.
When the machine tool spindle rotates at a high speed, the centripetal force effect is large, so that surrounding scrap irons or other objects cannot be close to the spindle, during machining, high-speed cutting is performed, the scrap irons splash, then the high-speed turntable is used for applying force, serious safety threat is caused to a human body and other important equipment, meanwhile, the spindle rotating speed is not easy to find out abnormally in time, the unstable quality of a workpiece in the continuous machining process is difficult to guarantee, the emergency stop switch is operated by a worker for a long time, and quick response cannot be realized.
In the prior art, a speed monitoring device capable of quickly responding to the abnormal rotating speed of a machine tool spindle is lacked.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a speed monitoring device for a special machine tool rotating shaft aiming at the defects in the prior art; the device combines manual emergency stop operation with automatic detection control, can realize automatic speed measurement control, conveniently carries out manual emergency stop control again.
In order to achieve the above object, the utility model adopts the following technical scheme:
a speed monitoring device for a special machine tool rotating shaft comprises a main motor for driving a machine tool spindle, a belt pulley arranged on an output shaft of the main motor, and an emergency stop switch arranged on the machine tool, and further comprises: the speed detection device is arranged between the main motor and the belt pulley, the speed monitor is electrically connected with the speed detection device, and the safety relay is electrically connected with the speed monitor; the power output end of the safety relay is connected into a main control loop used for controlling the action of the main motor, and the emergency stop switch is connected between the safety relay and the speed monitor.
Further, the safety relay is provided with a reset circuit, and the reset circuit comprises a reset switch and a main circuit contact which are sequentially connected from the power supply side of the safety relay to the reset input end of the safety relay.
Further, the speed detection device comprises a C-shaped frame arranged at the end face of the main motor, a connecting plate vertically arranged on the C-shaped frame, a proximity switch arranged on the connecting plate, and a proximity block arranged on the end face of the belt pulley; the two proximity switches are oppositely arranged and can correspond to the two ends of the proximity block, and the two proximity switches are respectively connected to the two signal input ends of the speed monitor.
Further, the main control loop comprises a main power supply, a contactor and a main motor which are electrically connected in sequence; the power supply input side of the contactor is connected with an intermediate relay, the power output end of the safety relay is connected with the power supply end of the intermediate relay, and a group of contacts of the contactor are connected into a reset circuit of the safety relay to form main circuit contacts.
The utility model has the advantages that:
1. a speed detection device is additionally arranged on a main motor of the machine tool, a speed monitor is used for carrying out speed abnormity analysis, and the abnormal speed is found and then fed back to a safety relay, the safety relay controls a main control loop to cut off the power supply of the main motor, so that emergency stop is realized, and further damage or damage to a workpiece is avoided; the control process has high response speed, and the control operation is safe, stable and reliable;
2. the utility model also keeps a manually controlled emergency stop switch, which increases the flexibility of operation; the on-off of the emergency stop switch acts on the speed monitor in a feedback signal mode, and the speed monitor acts on the safety relay, so that the action control of the main control loop is realized;
3. the utility model discloses in the return circuit that resets with a set of main circuit contact access safety relay in the main control circuit, when main motor operation, the disconnection of main circuit contact, even the maloperation reset switch also can not influence speed testing process, has increased the security and the stability of system operation.
Drawings
FIG. 1 is an electrical schematic diagram of the system control of the present invention;
fig. 2 is a schematic view of the connection structure between the middle speed detecting device and the main motor and the belt pulley of the present invention.
Wherein, 1-the main motor; 2-a belt pulley; 3-emergency stop switch; 4-a speed monitor; 5-a safety relay; 6-C type frame; 7-a connecting plate; 8-a proximity switch; 9-proximity block; 10-a reset switch; 11-main return contact; 12-main power supply.
Detailed Description
The following describes preferred embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1 and 2, a speed monitoring device for a rotating shaft of a special machine tool; the device comprises a main motor 1, a belt pulley 2 and an emergency stop switch 3; the belt pulley 2 is arranged on the output shaft of the main motor 1, and the main shaft of the motor is driven in a belt transmission mode; the emergency stop switch 3 is arranged on the motor and used for cutting off the power supply of the system and stopping the power supply of the main motor 1. The key improvement of the device is that a speed detection device, a speed monitor 4 and a safety relay 5 are additionally arranged, the abnormal monitoring of the rotating speed of the main motor 1 is realized by utilizing the additionally arranged components, the power supply of the main motor 1 is automatically and rapidly cut off after the abnormality occurs, and meanwhile, the manual operation of the emergency stop switch 3 is kept.
The speed detection device is arranged between the main motor 1 and the belt pulley 2 and is used for realizing the monitoring of the rotating speed of the belt pulley 2; the speed detection device comprises a C-shaped frame 6, a connecting plate 7, a proximity switch 8 and a proximity block 9; a threaded hole is machined in the end face where the output shaft of the main motor 1 is located, the C-shaped frame 6 is installed on the end face where the output shaft of the main motor 1 is located through screws, and the C-shaped mechanism of the C-shaped frame 6 is convenient to install and fix laterally; two connecting plates 7 are arranged and are vertically arranged at the end face of the C-shaped frame 6, and the connecting plates 7 are oppositely arranged; two proximity switches 8 are arranged and are respectively arranged at the connecting plate 7; the approach block 9 is fixed on the end face of the belt pulley 2, and can be fixed by using a screw after a threaded hole is processed on the end face of the belt pulley 2, and other fixing modes can also be applied; the whole approach block 9 is in a long strip plate shape, two ends of the approach block are in arc shapes, and a round hole is formed in the middle of the approach block; in order to facilitate the installation of the approach block 9, the approach block 9 can be divided into two parts by a circular hole and is arranged outside the output shaft of the main motor 1 in a splicing mode, so that the belt pulley 2 does not need to be disassembled; the two ends of the approach block 9 should be metal surfaces, or a metal block structure is added to trigger the approach switch 8, and the distance between the approach switch 8 and the end of the approach block 9 should be controlled to be 2-3 mm. The belt pulley 2 drives the approach blocks 9 to synchronously rotate, two approach switches 8 are triggered once when rotating 180 degrees, and the rotating speed of the belt pulley 2 can be known by knowing the triggering times of the approach switches 8 in unit time.
The speed monitor 4 and the safety relay 5 can be built into the interior of the distribution box. The speed monitor 4 is an existing product and can be programmed and controlled; two proximity switches 8 are respectively connected with two signal input ends of the speed monitor 4, the output end of the speed monitor 4 is connected with a signal feedback end of the safety relay 5, and the safety relay 5 realizes the control of a main control loop according to the signal feedback, so that the quick power-off of the main motor 1 is realized. In order to keep the manual control of the emergency stop switch 3, the emergency stop switch 3 is additionally arranged between the safety relay 5 and the speed monitor 4, the emergency stop switch 3 adopts double linkage control, and is connected with the other two signal input ends of the speed monitor 4. In the reset circuit of the safety relay 5, the power input side of the safety relay 5 is sequentially connected to the self reset input end through the reset switch 10 and the main circuit contact 11, in the running process of the main control circuit, the normal work of the speed monitor 4 and the safety relay 5 can not be influenced even if the reset switch 10 is triggered by mistake, and meanwhile, after the main control circuit is disconnected, the reset circuit can avoid the main motor 1 from being started again under no operation.
The main control loop of the machine tool comprises a control loop of a main motor 1, and the control loop comprises a main power supply 12, a contactor KM and the main motor 1 which are electrically connected in sequence; the specific connection relation is that the power supply input side of the contactor KM is connected with the intermediate relay KA, the power supply voltage of the contactor KM is AC110V, the power output end of the safety relay 5 is connected with the power supply end of the intermediate relay KA, and a group of normally closed contacts of the contactor KM are connected with the reset loop of the safety relay 5 to form a main loop contact 11; the intermediate relay KA is controlled through the safety relay 5, the contact action of the contactor KM is controlled by the intermediate relay KA, and therefore the main motor 1 and the main power supply 12 are cut off.
The utility model discloses a working process and principle are:
in the operation process of the machine tool: the two proximity switches 8 are matched with the proximity block 9, the proximity switches 8 are triggered and send signals to the speed monitor 4, the speed monitor 4 carries out speed comparison, and if the detected speed does not exceed a set value, the whole system operates normally; if the rotating speed of the main motor 1 exceeds a set value, the rotating speed of the main motor 1 is abnormal, the speed monitor 4 sends an abnormal feedback signal to the safety relay 5 at the moment, the safety relay 5 stops outputting +24V to the intermediate relay KA, a coil of the intermediate relay KA loses power, a normally open contact of the intermediate relay KA is converted into a separated state from a closed state, a coil of the contactor KM loses power at the moment, a normally open contact of the contactor KM connected with the main power supply 12 and the main motor 1 is converted into a separated state from a closed state, a normally closed main loop contact 11 of the contactor KM in a reset loop of the safety relay 5 is converted into a closed state from a separated state, the safety relay 5 cannot act at the moment, and the power supply of the main motor 1 is cut off; the control process is high in automation degree and response speed, and the power supply of the main motor 1 is quickly cut off after the main motor 1 outputs abnormity, so that a machine tool and a workpiece are effectively protected. If the control system operates again, firstly operating the reset switch 10 to enable the safety relay 5 to act again and continuously outputting +24V to the intermediate relay KA; after the intermediate relay KA obtains +24V input, the coil is electrified, the normally open contact of the coil is switched to a closed state from an open state, the coil of the contactor KM is electrified at the moment, the normally open contact of the contactor KM between the main motor 1 and the main power supply 12 is switched to the closed state from the open state, and the main motor 1 is started; after the coil of the contactor KM is electrified, the main circuit contact 11 is converted into an open state from a closed state. When the emergency stop switch 3 needs to be controlled manually: after the emergency stop switch 3 is triggered, the speed monitor 4 receives the feedback signal and sends the feedback signal to the safety relay 5, and the safety relay 5 controls the contactor and finally realizes the circuit disconnection between the main motor 1 and the power supply.
Claims (1)
1. The utility model provides a speed monitoring device for special machine tool rotation axis, includes the main motor that is used for driving the lathe main shaft, establishes the belt pulley on main motor output shaft, establishes the scram switch on the lathe, its characterized in that still includes: the speed detection device is arranged between the main motor and the belt pulley, the speed monitor is electrically connected with the speed detection device, and the safety relay is electrically connected with the speed monitor; the power output end of the safety relay is connected into a main control loop for controlling the action of a main motor, and the emergency stop switch is connected between the safety relay and the speed monitor; the safety relay is provided with a reset loop, and the reset loop comprises a reset switch and a main loop contact which are sequentially connected from the power supply side of the safety relay to the self reset input end; the speed detection device comprises a C-shaped frame arranged at the end face of the main motor, a connecting plate vertically arranged on the C-shaped frame, a proximity switch arranged on the connecting plate, and a proximity block arranged on the end face of the belt pulley; the two proximity switches are oppositely arranged and can be correspondingly arranged at two ends of the proximity block, and the two proximity switches are respectively connected with two signal input ends of the speed monitor; the main control loop comprises a main power supply, a contactor and a main motor which are electrically connected in sequence; the power supply input side of the contactor is connected with an intermediate relay, the power output end of the safety relay is connected with the power supply end of the intermediate relay, and a group of contacts of the contactor are connected into a reset circuit of the safety relay to form main circuit contacts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222071811.3U CN217453216U (en) | 2022-08-08 | 2022-08-08 | Speed monitoring device for special machine tool rotating shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222071811.3U CN217453216U (en) | 2022-08-08 | 2022-08-08 | Speed monitoring device for special machine tool rotating shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217453216U true CN217453216U (en) | 2022-09-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222071811.3U Active CN217453216U (en) | 2022-08-08 | 2022-08-08 | Speed monitoring device for special machine tool rotating shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217453216U (en) |
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2022
- 2022-08-08 CN CN202222071811.3U patent/CN217453216U/en active Active
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Effective date of registration: 20240527 Address after: No. 41 East Road, Shetang Town, Maiji District, Tianshui City, Gansu Province, 741020 Patentee after: Gansu Xinghuo Intelligent CNC Machine Tool Co.,Ltd. Country or region after: China Address before: Shetang Industrial Park, Tianshui Economic and Technological Development Zone, Tianshui City, Gansu Province, 741020 Patentee before: Tianshui Spark Machine Tool Co.,Ltd. Country or region before: China |