CN220718672U - Lubrication system of numerical control machine tool - Google Patents
Lubrication system of numerical control machine tool Download PDFInfo
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- CN220718672U CN220718672U CN202322176697.5U CN202322176697U CN220718672U CN 220718672 U CN220718672 U CN 220718672U CN 202322176697 U CN202322176697 U CN 202322176697U CN 220718672 U CN220718672 U CN 220718672U
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- 238000005461 lubrication Methods 0.000 title claims abstract description 44
- 238000012544 monitoring process Methods 0.000 claims abstract description 33
- 230000002159 abnormal effect Effects 0.000 claims abstract description 6
- 230000001050 lubricating effect Effects 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000001934 delay Effects 0.000 claims description 4
- 230000007547 defect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 abstract 7
- 239000010687 lubricating oil Substances 0.000 abstract 2
- 238000003754 machining Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009193 crawling Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of pressure monitoring, in particular to a lubrication system of a numerical control machine tool, which comprises a main oil pipe and a branch oil pipe, and further comprises: the pressure switch is provided with a plurality of pressure switches, corresponds to the main oil pipe and the branch oil pipe one by one, and comprises a switch body and switch contacts, wherein the switch body is connected in series in the corresponding oil pipe, and the switch contacts are normally open contacts; the pressure monitoring circuit is in one-to-one correspondence with the pressure switch; the switch contact is connected to the pressure monitoring circuit, and the pressure monitoring circuit is used for detecting the initial state and the working state of the switch contact and outputting an alarm signal when the switch contact is abnormal. The system can realize the whole coverage of the whole lubricating oil path, can timely detect when the main oil pipe or any branch oil pipe of the lubricating oil path breaks down, generates an alarm signal and sends the alarm signal to the machine tool control system to prompt an operator to timely process, overcomes the serious defects of the conventional numerical control machine tool lubricating system, and avoids larger faults and losses.
Description
Technical Field
The utility model relates to the technical field of pressure monitoring, in particular to a lubrication system of a numerical control machine tool.
Background
The lubrication system of the numerical control machine tool is mainly applied to lubrication of parts such as guide rails, bearings, lead screws, nuts, gears, tips and the like. The system is an indispensable important system of the numerical control machine tool, and has important roles in improving the machining precision of the machine tool, prolonging the service life of the machine tool and the like.
The lubrication system of the numerical control machine tool mainly comprises a lubrication workstation, a main oil pipe, an oil distributor, a branch oil pipe and an oil nozzle. The key element of the coordinated operation of the system is a control circuit board of the lubrication work station, wherein the control circuit board can set the starting interval time and the lubrication work time, and is provided with a pressure switch for detecting whether the pressure of the main oil pipe can reach the required pressure value in the lubrication process.
In the existing numerical control machine tool lubrication system, only a pressure switch is arranged on a main oil pipe, and the pressure switch can only be used for monitoring the pressure of the main oil pipe. However, the numerical control machine tool often has more than ten branch oil pipes, if only a small part of branch oil pipes are blocked, broken and other faults occur, the pressure of the main oil pipe is still in a normal state, and the normal operation of all branch oil pipes cannot be ensured through a main oil pipe pressure switch. This results in: firstly, because the lubrication of individual moving parts of the lubricating points of the branch oil pipes is insufficient, local serious abrasion is caused, the normal movement of the whole movement system is gradually influenced over time, and the service life of a machine tool is reduced; secondly, the crawling phenomenon of the machine tool is caused by insufficient lubrication, and accordingly the machining precision of the machine tool is reduced, and the quality of products cannot be guaranteed.
Disclosure of Invention
The utility model provides a lubrication system of a numerical control machine tool, which aims to overcome the technical defect that the lubrication system of the traditional numerical control machine tool cannot ensure that all branch oil pipes work normally.
The utility model provides a lubrication system of a numerical control machine tool, which comprises a main oil pipe and a branch oil pipe and is characterized by further comprising:
the pressure switch is provided with a plurality of pressure switches and corresponds to the main oil pipe and the branch oil pipe one by one, the pressure switch comprises a switch body and switch contacts, the switch body is connected in the corresponding oil pipe in series, and the switch contacts are normally open contacts;
the pressure monitoring circuits are in one-to-one correspondence with the pressure switches;
the switch contact is connected to the pressure monitoring circuit, and the pressure monitoring circuit is used for detecting the initial state and the working state of the switch contact and outputting an alarm signal when the switch contact is abnormal.
Optionally, the pressure monitoring circuit includes a first delayer IC1, a second delayer IC2, a third delayer IC3, a first relay K1, a second relay K2, a third relay K3, a fourth relay K4, a fifth relay K5, a sixth relay K6, a switch contact, a first voltage comparator U1A, a second voltage comparator U1B, and an alarm circuit, the first relay K1 includes a coil K1 and a normally open contact K1, the second relay K2 includes a coil K2 and a normally open contact K2, the third relay K3 includes a coil K3 and a normally closed contact K3, the fourth relay K4 includes a coil K4 and a normally closed contact K4, the fifth relay K5 includes a coil K5 and a normally open contact K5, and the sixth relay K6 includes a coil K6 and a normally open contact K6;
the input end of the first delayer IC1 is grounded through a first resistor and sequentially connected with the power supply positive electrode through a capacitor C1, a normally open contact K2 and a normally closed contact K3, the input end of the second delayer IC2 is grounded through a second resistor and sequentially connected with the power supply positive electrode through the capacitor C2, the normally open contact K2 and the normally closed contact K3, the input end of the third delayer IC3 is grounded through a third resistor and sequentially connected with the power supply positive electrode through the capacitor C3, the normally open contact K2 and the normally closed contact K3, the output end of the first delayer IC1, the output end of the second delayer IC2 and the output end of the third delayer IC3 are respectively grounded through the coil K3, the coil K4 and the coil K5, the delay time of the first delayer IC1 is suitable for controlling the on-off of the whole pressure monitoring circuit, the delay time of the second delayer IC2 is suitable for controlling the first voltage comparator U1A to detect the switch contact in an initial state, and the third delayer IC3 controls the second voltage comparator U1 to detect the switch contact in a state;
one end of the pressure switch is connected with the positive electrode of the power supply through a normally open contact K2 and a normally closed contact K3 in sequence;
the positive input end of the first voltage comparator U1A and the negative input end of the second voltage comparator U1B are connected with the other end of the pressure switch, the negative input end of the first voltage comparator U1A and the positive input end of the second voltage comparator U1B are connected with a reference circuit to obtain reference voltage, the output end of the first voltage comparator U1A is grounded through a normally closed contact K4 and a coil K6 in sequence, and the output end of the second voltage comparator U1B is grounded through a normally open contact K5 and a coil K6 in sequence;
the coil K1 is suitable for being connected to two power supply terminals of the lubricating motor in parallel, one end of the normally open contact K1 is connected with the positive electrode of the power supply through a normally closed contact K3, the other end of the normally open contact K1 is grounded through a coil K2, and the normally open contact K6 is connected in series in the alarm circuit.
Optionally, the normally open contact K2 comprises a normally open contact K2-1 and a normally open contact K2-2, the normally open contact K2-1 is connected to two ends of the normally open contact K1 in parallel, and the normally open contact K2-2 is connected with the positive electrode of the power supply through a normally closed contact K3.
Optionally, the first resistor includes a first sliding resistor RP1 and a first resistor R1, the second resistor is a second resistor R2, and the third resistor includes a second sliding resistor RP2 and a third resistor R3.
Optionally, the pressure monitoring circuit is powered by direct current 12V.
Optionally, the first delay device IC1, the second delay device IC2 and the third delay device IC3 are 555 delay devices.
Compared with the prior art, the technical scheme provided by the utility model has the following advantages:
according to the numerical control machine tool lubrication system provided by the utility model, the switch bodies are connected in series in the main oil pipe and the branch oil pipe, the switch contacts corresponding to the switch bodies are connected with the pressure monitoring circuit, the pressure monitoring circuit can detect the initial state and the working state of the switch contacts and output alarm signals when the switch contacts are abnormal, so that the whole coverage of the whole lubrication oil path is realized, when the main oil pipe or any branch oil pipe of the lubrication oil path breaks down, the whole lubrication oil path can be detected in time, the alarm signals are generated and sent to the machine tool control system to prompt an operator to process in time, the major defects of the traditional numerical control machine tool lubrication system are overcome, and larger faults and losses are avoided.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 shows a structural layout of a lubrication system of a numerical control machine in an embodiment of the present utility model;
fig. 2 shows a schematic circuit diagram of a pressure monitoring circuit according to an embodiment of the utility model.
In the figure:
1. a lubrication workstation; 2. a main oil pipe; 3. an oil separator; 4. a branch oil pipe; 5. a nipple; 6. a switch body.
Detailed Description
In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be made. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the utility model.
Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
In one embodiment, referring to fig. 1, a numerically controlled machine tool lubrication system includes a main oil pipe 2, a branch oil pipe 4, a pressure switch, and a pressure monitoring circuit; the pressure switch is provided with a plurality of pressure switches and corresponds to the main oil pipe 2 and the branch oil pipe 4 one by one, the pressure switch comprises a switch body 6 and switch contacts, the switch body 6 is connected in series in the corresponding oil pipe, and the switch contacts are normally open contacts; the pressure monitoring circuits are in one-to-one correspondence with the pressure switches; the switch contact is connected to the pressure monitoring circuit, and the pressure monitoring circuit is used for detecting the initial state and the working state of the switch contact and outputting an alarm signal when the switch contact is abnormal.
It should be noted that the above only outlines the parts modified in this embodiment, but it is clear to those skilled in the art that the lubrication system of the numerically controlled machine tool should further include the lubrication workstation 1, the oil separator 3, and the oil nozzle 5.
The operating principle of the switch body 6 is easily understood as follows: the switch body 6 is connected in series in the corresponding oil pipe, and when the oil pressure of the oil pipe reaches a preset value, the switch body 6 controls the switch contact to be turned on from normally open.
Specifically, referring to fig. 2, the pressure monitoring circuit includes a first delay IC1, a second delay IC2, a third delay IC3, a first relay K1, a second relay K2, a third relay K3, a fourth relay K4, a fifth relay K5, a sixth relay K6, a switch contact, a first voltage comparator U1A, a second voltage comparator U1B, and an alarm circuit, the first relay K1 includes a coil K1 and a normally open contact K1, the second relay K2 includes a coil K2 and a normally open contact K2, the third relay K3 includes a coil K3 and a normally closed contact K3, the fourth relay K4 includes a coil K4 and a normally closed contact K4, the fifth relay K5 includes a coil K5 and a normally open contact K5, and the sixth relay K6 includes a coil K6 and a normally open contact K6; the input end of the first delayer IC1 is grounded through a first resistor and sequentially connected with the power supply positive electrode through a capacitor C1, a normally open contact K2 and a normally closed contact K3, the input end of the second delayer IC2 is grounded through a second resistor and sequentially connected with the power supply positive electrode through the capacitor C2, the normally open contact K2 and the normally closed contact K3, the input end of the third delayer IC3 is grounded through a third resistor and sequentially connected with the power supply positive electrode through the capacitor C3, the normally open contact K2 and the normally closed contact K3, the output end of the first delayer IC1, the output end of the second delayer IC2 and the output end of the third delayer IC3 are grounded through a coil K3, a coil K4 and a coil K5 respectively, the delay time of the first delayer IC1 is suitable for controlling the on-off of the whole pressure monitoring circuit, the delay time of the second delayer IC2 is suitable for controlling the first voltage comparator U1A to detect the switching contact in an initial state, and the delay time of the third delayer IC3 is suitable for controlling the second voltage comparator U1B to detect the switching contact in an operating state; one end of the pressure switch is connected with the positive electrode of the power supply through a normally open contact K2 and a normally closed contact K3 in sequence; the positive input end of the first voltage comparator U1A and the negative input end of the second voltage comparator U1B are connected with the other end of the pressure switch, the negative input end of the first voltage comparator U1A and the positive input end of the second voltage comparator U1B are connected with a reference circuit to obtain reference voltage, the output end of the first voltage comparator U1A is grounded through a normally-closed contact K4 and a coil K6 in sequence, and the output end of the second voltage comparator U1B is grounded through a normally-open contact K5 and a coil K6 in sequence; the coil K1 is suitable for being connected to two power supply terminals of the lubricating motor in parallel, one end of the normally open contact K1 is connected with the positive electrode of the power supply through the normally closed contact K3, the other end of the normally open contact K1 is grounded through the coil K2, and the normally open contact K6 is connected in series in the alarm circuit.
Specifically, the normally open contact K2 comprises a normally open contact K2-1 and a normally open contact K2-2, the normally open contact K2-1 is connected to two ends of the normally open contact K1 in parallel, and the normally open contact K2-2 is connected with the positive electrode of the power supply through a normally closed contact K3. The normally open contact K2-1 and the normally open contact K1 can form a starting self-locking circuit. In other embodiments, normally open contact K2 may include only normally open contact K2-2.
More specifically, the first resistor includes a first slide resistor RP1 and a first resistor R1, the second resistor is a second resistor R2, and the third resistor includes a second slide resistor RP2 and a third resistor R3. The delay time length of the first delayer IC1 can be adjusted by adjusting the resistance value of the first slide rheostat RP1, and the delay time length of the third delayer IC3 can be adjusted by adjusting the resistance value of the second slide rheostat RP2, so that the circuit of the embodiment can be suitable for scenes with different starting intervals and different lubrication working times, and the application range is wider. It is easy to understand that since the delay time of the second delay IC2 is suitable for controlling the first voltage comparator U1A to detect the switch contact in the initial state, generally about 1 second, no adjustment is required. In other embodiments, the first resistor and the second resistor may also be set to a fixed resistance value for detecting a specific adaptation scene.
More specifically, the pressure monitoring circuit is powered by direct current 12V. In other embodiments, other voltage sources may be used to provide power.
More specifically, the first delay IC1, the second delay IC2, and the third delay IC3 are 555 delays. The circuit structure is simpler and the control is stable. In other embodiments, other types of delays may be used, as long as the delay requirement is met.
More specifically, the delay time of the first delay IC1 is 30 to 60 seconds, the delay time of the second delay IC2 is 1 second, and the delay time of the third delay IC3 is 20 to 50 seconds. In other embodiments, the delay time may be selected to be other values depending on the actual start-up interval and lubrication operation time. However, it should be noted that, since the delay time of the first delayer IC1 is suitable for controlling the on-off of the whole pressure monitoring circuit, the delay time of the second delayer IC2 is suitable for controlling the first voltage comparator U1A to detect the switch contact in the initial state, and the delay time of the third delayer IC3 is suitable for controlling the second voltage comparator U1B to detect the switch contact in the working state, the delay time of the first delayer IC1 should be longer than the delay time of the third delayer IC3, and the delay time of the third delayer IC3 should be longer than the delay time of the second delayer IC 2.
As can be easily understood, as shown in fig. 2, in the first delay device IC1, the second delay device IC2, and the third delay device IC3, the pin 2 and the pin 6 are connected together as input terminals, the pin 3 is an output terminal, the pin 8 is a power terminal, and the pin 1 is grounded; in the first voltage comparator U1A, pin 1 is an output terminal, pin 2 is a negative input terminal, pin 3 is a positive input terminal, and pins 4 and 8 are power supply terminals; in the second voltage comparator U1B, pin 7 is an output terminal, pin 6 is a negative input terminal, pin 5 is a positive input terminal, and the power supply terminal is not identified.
The working principle of the pressure monitoring circuit of this embodiment is as follows:
when the lubrication workstation 1 of the numerical control machine starts to work according to a preset interval time, a lubrication motor is started to be electrified, a coil K1 is electrified, a normally open contact K1 is attracted, a coil K2 is electrified, normally open contacts K2-1 and K2-2 are attracted, and a first delayer IC1, a second delayer IC2 and a third delayer IC3 are electrified at the same time; the first voltage comparator U1A detects the initial pressure at the switch contact within 1 second after power-on, if the switch contact is opened to represent normal, the output end of the first voltage comparator U1A outputs a low level, the alarm circuit is not started, if the switch contact is closed, the pressure generated by the last lubrication work is not discharged to represent the blockage inside an oil pipe, the output end of the first voltage comparator U1A outputs a high level, the coil K6 is powered on, the normally open contact K6 is closed, and the alarm circuit is started; after 1 second of power-on, the second delay device IC2 controls the coil K4 to be powered on, the normally closed contact K4 is disconnected, and the first voltage comparator U1A does not detect the state of the switch contact any more so as to prevent erroneous judgment; after 20 to 50 seconds of power-on, the lubrication system works for a period of time, oil pressure of each oil pipe is established, a third delay device IC3 controls a coil K5 to be electrified, a normally open contact K5 is closed, a second voltage comparator U1B detects the state of a switch contact, if the switch contact is closed to represent normal, the output end of the second voltage comparator U1B outputs a low level, an alarm circuit is not started, if the switch contact is opened, the oil pipe pressure is not established, oil pipe breakage or oil distributor 3 faults exist, the output end of the second voltage comparator U1B outputs a high level, a coil K6 is electrified, the normally open contact K6 is closed, and the alarm circuit is started; after the power is applied for 30 to 60 seconds, the first delayer IC1 controls the coil K3 to be electrified, the normally closed contact K3 is disconnected, and the detection is finished. When the lubrication station 1 is started again, the next cycle starts.
The pressure monitoring circuit of the embodiment is composed of three delayers, six relays, two voltage comparators and a plurality of components, and is simple and reliable in circuit structure and high in practicability.
According to the numerical control machine tool lubrication system provided by the embodiment, the switch body 6 is connected in series in the main oil pipe 2 and the branch oil pipe 4, and the switch contact corresponding to the switch body 6 is connected with the pressure monitoring circuit, the pressure monitoring circuit can detect the initial state and the working state of the switch contact and output an alarm signal when abnormal, so that the whole coverage of the whole lubrication oil path is realized, when the main oil pipe 2 or any branch oil pipe 4 of the lubrication oil path breaks down, the whole lubrication oil path can be detected in time, the alarm signal is generated and sent to the machine tool control system to prompt an operator to process in time, the serious defect of the traditional numerical control machine tool lubrication system is overcome, and larger faults and losses are avoided.
The foregoing is only a specific embodiment of the utility model to enable those skilled in the art to understand or practice the utility model. Although described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and they should be construed as covering the scope of the appended claims.
Claims (6)
1. The utility model provides a digit control machine tool lubricating system, includes main oil pipe (2) and branch road oil pipe (4), its characterized in that still includes:
the pressure switch is provided with a plurality of pressure switches and corresponds to the main oil pipe (2) and the branch oil pipe (4) one by one, the pressure switch comprises a switch body (6) and switch contacts, the switch body (6) is connected in series in the corresponding oil pipe, and the switch contacts are normally open contacts;
the pressure monitoring circuits are in one-to-one correspondence with the pressure switches;
the switch contact is connected to the pressure monitoring circuit, and the pressure monitoring circuit is used for detecting the initial state and the working state of the switch contact and outputting an alarm signal when the switch contact is abnormal.
2. The numerically controlled machine tool lubrication system of claim 1, wherein the pressure monitoring circuit comprises a first delay IC1, a second delay IC2, a third delay IC3, a first relay K1, a second relay K2, a third relay K3, a fourth relay K4, a fifth relay K5, a sixth relay K6, a switch contact, a first voltage comparator U1A, a second voltage comparator U1B, and an alarm circuit, the first relay K1 comprises a coil K1 and a normally open contact K1, the second relay K2 comprises a coil K2 and a normally open contact K2, the third relay K3 comprises a coil K3 and a normally closed contact K3, the fourth relay K4 comprises a coil K4 and a normally closed contact K4, the fifth relay K5 comprises a coil K5 and a normally open contact K5, and the sixth relay K6 comprises a coil K6 and a normally open contact K6;
the input end of the first delayer IC1 is grounded through a first resistor and sequentially connected with the power supply positive electrode through a capacitor C1, a normally open contact K2 and a normally closed contact K3, the input end of the second delayer IC2 is grounded through a second resistor and sequentially connected with the power supply positive electrode through the capacitor C2, the normally open contact K2 and the normally closed contact K3, the input end of the third delayer IC3 is grounded through a third resistor and sequentially connected with the power supply positive electrode through the capacitor C3, the normally open contact K2 and the normally closed contact K3, the output end of the first delayer IC1, the output end of the second delayer IC2 and the output end of the third delayer IC3 are respectively grounded through the coil K3, the coil K4 and the coil K5, the delay time of the first delayer IC1 is suitable for controlling the on-off of the whole pressure monitoring circuit, the delay time of the second delayer IC2 is suitable for controlling the first voltage comparator U1A to detect the switch contact in an initial state, and the third delayer IC3 controls the second voltage comparator U1 to detect the switch contact in a state;
one end of the pressure switch is connected with the positive electrode of the power supply through a normally open contact K2 and a normally closed contact K3 in sequence;
the positive input end of the first voltage comparator U1A and the negative input end of the second voltage comparator U1B are connected with the other end of the pressure switch, the negative input end of the first voltage comparator U1A and the positive input end of the second voltage comparator U1B are connected with a reference circuit to obtain reference voltage, the output end of the first voltage comparator U1A is grounded through a normally closed contact K4 and a coil K6 in sequence, and the output end of the second voltage comparator U1B is grounded through a normally open contact K5 and a coil K6 in sequence;
the coil K1 is suitable for being connected to two power supply terminals of the lubricating motor in parallel, one end of the normally open contact K1 is connected with the positive electrode of the power supply through a normally closed contact K3, the other end of the normally open contact K1 is grounded through a coil K2, and the normally open contact K6 is connected in series in the alarm circuit.
3. The lubrication system of the numerical control machine tool according to claim 2, wherein the normally open contact K2 comprises a normally open contact K2-1 and a normally open contact K2-2, the normally open contact K2-1 is connected to two ends of the normally open contact K1 in parallel, and the normally open contact K2-2 is connected with a positive electrode of a power supply through a normally closed contact K3.
4. The numerically controlled machine tool lubrication system of claim 2, wherein the first resistor comprises a first slide resistor RP1 and a first resistor R1, the second resistor is a second resistor R2, and the third resistor comprises a second slide resistor RP2 and a third resistor R3.
5. The numerically controlled machine tool lubrication system of any of claims 2 to 4, wherein the pressure monitoring circuit is powered by dc 12V.
6. The lubrication system of any one of claims 2 to 4, wherein the first, second and third delays IC1, IC2 and IC3 are 555 delays.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322176697.5U CN220718672U (en) | 2023-08-14 | 2023-08-14 | Lubrication system of numerical control machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322176697.5U CN220718672U (en) | 2023-08-14 | 2023-08-14 | Lubrication system of numerical control machine tool |
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| Publication Number | Publication Date |
|---|---|
| CN220718672U true CN220718672U (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322176697.5U Active CN220718672U (en) | 2023-08-14 | 2023-08-14 | Lubrication system of numerical control machine tool |
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| Country | Link |
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| CN (1) | CN220718672U (en) |
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- 2023-08-14 CN CN202322176697.5U patent/CN220718672U/en active Active
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