CN113839585A - Brake control circuit, device and equipment - Google Patents
Brake control circuit, device and equipment Download PDFInfo
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- CN113839585A CN113839585A CN202111217400.4A CN202111217400A CN113839585A CN 113839585 A CN113839585 A CN 113839585A CN 202111217400 A CN202111217400 A CN 202111217400A CN 113839585 A CN113839585 A CN 113839585A
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- relay
- switch
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- power supply
- brake
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- 101100153768 Oryza sativa subsp. japonica TPR2 gene Proteins 0.000 description 12
- 101150037899 REL1 gene Proteins 0.000 description 12
- 101150102021 REL2 gene Proteins 0.000 description 12
- 101100099158 Xenopus laevis rela gene Proteins 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
- H02P3/08—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a DC motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/24—Operating devices
- B66D5/30—Operating devices electrical
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The application provides a brake control circuit, a brake control device and brake control equipment. In the circuit, the negative pole of the power supply unit is connected with the negative pole of the output unit, the positive pole of the power supply unit is connected with one end of a normally open contact of a third relay, the other end of the normally open contact of the third relay is connected with the positive pole of the output unit, a coil of the third relay is connected with a software control end, the software control end is also respectively connected with a first switch and a second switch, the anode of the battery unit is connected with one end of the coil of the first relay, the other end of the coil of the first relay is connected with the negative pole of the output unit through the second switch, and meanwhile, the coil of the second relay is connected with a system power supply.
Description
Technical Field
The application relates to the technical field of engineering machinery, in particular to a brake control circuit, a brake control device and brake control equipment.
Background
The tower crane is the most common lifting equipment on the construction site, and is also called tower crane, and is provided with three mechanisms of lifting, rotating and amplitude-changing, and the lifting, rotating and amplitude-changing motors are respectively controlled to carry out up-and-down, left-and-right and front-and-back space movement on goods. The rotary brake is an essential component of a rotary motor, controls the stop brake of the large arm of the tower crane, and is an important part in the control of the tower crane.
The gyration brake is different according to rotary motor mechanical structure, can divide into normal open brake and normal close formula brake, and wherein, normal open brake is for the big arm of the dead tower crane of brake lock when giving the power, then loosens big arm when stopping giving the power, and normal close formula brake then is opposite with it, loosens big arm when giving the power, and the big arm of the dead tower crane of brake lock when stopping giving the power. At present, tower crane manufacture factory designs control circuit respectively to two kinds of brake modes mostly, promptly, designs a control circuit to open brake in usual for control open brake in usual, designs a control circuit to close brake in usual for control close brake in usual.
However, the control circuits are respectively designed for the normally open type brake and the normally closed type brake for control, so that the production cost is higher.
Disclosure of Invention
An object of the embodiment of the application is to provide a brake control circuit, device and equipment to solve and design control circuit respectively to open brake and normal close formula brake and control, the higher problem of manufacturing cost. The specific technical scheme is as follows:
in a first aspect, a brake control circuit is provided, the circuit comprising: the control unit comprises a first relay, a second relay, a third relay, a first switch and a second switch;
the negative pole of the power supply unit is connected with the negative pole of the output unit, the positive pole of the power supply unit is connected with one end of a third relay normally open contact, the other end of the third relay normally open contact is connected with the positive pole of the output unit, a coil of the third relay is connected with the software control end, the software control end is also connected with the first switch and the second switch respectively, the anode of the battery unit is connected with one end of the first relay coil, the other end of the first relay coil is connected with the negative pole of the output unit through the second switch and is connected with the cathode of the battery unit, one end of the first relay normally open contact is connected with the anode of the battery unit through the first switch, and the other end of the first relay normally open contact is connected with one end of the second relay normally closed contact, the other end of the normally closed contact of the second relay is connected with the anode of the output unit, and a coil of the second relay is connected with a system power supply;
when the first switch is turned off, the control circuit is switched to a normally open type braking mode, and when the first switch is turned off, the control circuit is switched to a normally closed type braking mode.
In one possible embodiment, the first switch comprises a first contact and a second contact, the second switch comprises a third contact and a fourth contact,
one end of the first contact is connected with the anode of the battery unit, the other end of the first contact is connected with the normally open contact of the first relay, and the second contact is connected with the software control end;
one end of the third contact is connected with the coil of the first relay, the other end of the third contact is connected with the negative electrode of the output unit and the cathode of the battery unit, and the fourth contact is connected with the software control end.
In one possible embodiment, the battery unit includes a battery, a first resistor, a first diode, and a third switch,
one end of the third switch is connected with the anode of the power supply unit, the other end of the third switch is connected with the anode of the first diode, the cathode of the first diode is connected with the anode of the battery through the first resistor, the anode of the battery is connected with the coil of the first relay, and the third switch is also connected with the normally open contact of the first relay through the first switch; the cathode of the battery is connected with the negative electrode of the power supply unit and also connected with the negative electrode of the output unit;
when the third switch is closed, the power supply unit charges the battery through the third switch, the first diode and the first resistor.
In one possible embodiment, the output unit includes a brake coil, a second diode and a second resistor,
the positive electrode of the brake coil is connected with one end of the normally closed contact of the second relay and is also connected with one end of the normally open contact of the third relay, and the negative electrode of the brake coil is connected with the negative electrode of the power supply unit and is also connected with one end of the second switch; and the second diode is connected in series with the second resistor and then connected in parallel with two ends of the brake coil and used for afterflow of the brake coil.
In one possible embodiment, the power supply unit comprises an alternating current power supply and a rectifier bridge,
after the alternating current power supply is rectified by the rectifier bridge, the positive electrode of the alternating current power supply is respectively connected with the battery unit and the third relay, and the negative electrode of the alternating current power supply is connected with the negative electrode of the output unit.
In a second aspect, there is provided a brake control apparatus comprising the brake control circuit according to the first aspect.
In a third aspect, there is provided an apparatus comprising the brake control device according to the second aspect.
The embodiment of the application has the following beneficial effects:
the embodiment of the application provides a brake control circuit, device and equipment, the circuit includes: the control unit comprises a first relay, a second relay, a third relay, a first switch and a second switch; the negative pole of the power supply unit is connected with the negative pole of the output unit, the positive pole of the power supply unit is connected with one end of a third relay normally open contact, the other end of the third relay normally open contact is connected with the positive pole of the output unit, a coil of the third relay is connected with the software control end, the software control end is also connected with the first switch and the second switch respectively, the anode of the battery unit is connected with one end of the first relay coil, the other end of the first relay coil is connected with the negative pole of the output unit through the second switch and is connected with the cathode of the battery unit, one end of the first relay normally open contact is connected with the anode of the battery unit through the first switch, and the other end of the first relay normally open contact is connected with one end of the second relay normally closed contact, the other end of the normally closed contact of the second relay is connected with the anode of the output unit, and a coil of the second relay is connected with a system power supply; when the first switch is turned off, the control circuit is switched to a normally open type braking mode, and when the first switch is turned off, the control circuit is switched to a normally closed type braking mode.
Through this application, can utilize a control circuit to realize open and closed gyration brake always, for designing control circuit respectively to open brake always and closed brake always, reduced manufacturing cost and later maintenance's maintenance cost, in practical application, through two kinds of brake modes of a control circuit control, reduced the use degree of difficulty, convenience of customers operation.
Of course, not all advantages described above need to be achieved at the same time in the practice of any one product or method of the present application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a circuit diagram of a brake control circuit according to an embodiment of the present application.
Wherein the reference numerals are as follows:
d1: a rectifier bridge; k1: a third switch; d2: a first diode; r1: a first resistor; e1: a battery; k2: a first contact; k5: a second contact; k3: a third contact; k4: a fourth contact; REL 1: a first relay; REL 2: a second relay; REL 3: a third relay; d3: a second diode; r2: a second resistor; l1: and a brake coil.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The present application will now be described in further detail with reference to the accompanying drawings and detailed description: as shown in fig. 1, the present application discloses a brake control circuit, the circuit comprising: the control unit comprises a first relay REL1, a second relay REL2, a third relay REL3, a first switch and a second switch.
The negative electrode of the power supply unit is connected with the negative electrode of the output unit, the positive electrode of the power supply unit is connected with one end of a normally open contact of a third relay REL3, the other end of the normally open contact of the third relay REL3 is connected with the positive electrode of the output unit, a coil of the third relay REL3 is connected with the software control end, the software control end is further connected with the first switch and the second switch respectively, the anode of the battery unit is connected with one end of a coil of the first relay REL1, the other end of the coil of the first relay REL1 is connected with the negative electrode of the output unit through the second switch and is simultaneously connected with the cathode of the battery unit, one end of the normally open contact of the first relay REL1 is connected with the anode of the battery unit through the first switch, the other end of the normally open contact of the first relay REL1 is connected with one end of the normally closed contact of the second relay REL2, the other end of the normally closed contact of the second relay REL2 is connected with the positive electrode of the output unit, and the coil of the second relay REL2 is connected with the system power supply.
The first switch is a brake mode change-over switch and is used for changing over the brake modes (the brake modes comprise a normally open type brake mode and a normally closed type brake mode). When the first switch is closed, the control circuit is switched to a normally open type brake mode, and meanwhile, a first signal is sent to the software control end, the first signal is used for informing the software control end that the first switch is in a closed state, the software control end can determine that the control circuit is switched to the normally open type brake mode, and when the first switch is disconnected, the control circuit is switched to the normally closed type brake mode.
When the system power supply is powered off, the coil of the second relay REL2 loses power, the normally closed contact of the second relay REL2 is in a closed state, when the system power supply is powered on, the coil of the second relay REL2 is powered on, and the normally closed contact of the second relay REL2 is in an open state.
Under the condition that the first switch is closed and the system power supply is powered off, the control circuit is switched to a normally open braking mode, the normally closed contact of the second relay REL2 is in a closed state, and at the moment, a user can control the brake to be opened or closed by controlling the second switch (a manual brake switch), specifically: when the second switch is controlled to be closed, the normally open contact of the first relay REL1 is closed, the battery unit supplies power to the output unit through the first switch, the first relay REL1 and the second relay REL2, and a brake is opened; when the second switch is switched off, the normally open contact of the first relay REL1 is switched off, and the brake is closed.
Under the condition that the first switch is closed and the system power supply is electrified, the control circuit is in a normally open braking mode, the normally closed contact of the second relay REL2 is in an open state, at the moment, the battery unit cannot supply power to the output unit to control braking, and the second switch can be controlled to send a signal to the software control end so as to inform the software control end to control braking. Specifically, control during the second switch is closed, to software control end sends the second signal, and after software control end received the second signal, can get electric through software control signal control third relay REL3 coil, make its normally open contact closed, can supply power to output unit through the power supply unit like this, in addition, software control end basis receiving when first switch is closed first signal can be confirmed control circuit and be in the brake mode of normally opening, consequently, when tower crane gyration large arm received software control end control and moved, software control end can be according to the control logic of the brake mode of normally opening, and the state of control third relay REL3 is opened or is closed in order to control the brake.
First switch disconnection just under the condition of system power outage, control circuit switches to normal close formula brake mode, and at this moment, the big arm of tower crane gyration is in the lock dead state, generally comes to loosen the brake through electric vane in practical application, breaks off first switch can make battery unit not participate in brake control.
Under the condition that the first switch is disconnected and the system power supply is electrified, a signal can be sent to a software control end by controlling the second switch, the software control end is informed to control the brake, specifically, when the second switch is controlled to be closed, a second signal is sent to the software control end, after the software control end receives the second signal, the coil of the third relay REL3 can be controlled to be powered by the software control signal, so that the normally open contact of the third relay REL3 is closed, and then the power supply unit can supply power to the output unit, in addition, the software control end does not receive the first signal of the first switch closing, so that the control circuit can be determined to be in the normal close type braking mode, therefore, when the large revolving arm of the tower crane is controlled by the software control end to operate, the software control end can control the state of the third relay REL3 to control the brake to be opened or closed according to the control logic of the normal close type brake mode.
Through this application, can utilize a control circuit to realize open and closed gyration brake always, for designing control circuit respectively to open brake always and closed brake always, reduced manufacturing cost and later maintenance's maintenance cost, in practical application, through two kinds of brake modes of a control circuit control, reduced the use degree of difficulty, convenience of customers operation.
According to an embodiment of the application, the first switch comprises a first contact K2 and a second contact K5, the second switch comprises a third contact K3 and a fourth contact K4,
one end of the first contact K2 is connected with the anode of the battery unit, the other end of the first contact K2 is connected with the normally open contact of the first relay REL1, and the second contact K5 is connected with the software control end. The switching states of the first contact K2 and the second contact K5 are the same, the first switch is closed, that is, the first contact K2 and the second contact K5 are closed, the first switch is opened, that is, the first contact K2 and the second contact K5 are opened, and when the second contact K5 is closed, the first switch is sent to the software control end to inform the software control end that the first switch is switched to the closed state.
One end of the third contact K3 is connected with the coil of the first relay REL1, the other end is connected with the negative electrode of the output unit and the cathode of the battery unit, and the fourth contact K4 is connected with the software control end. The switching states of the third contact K3 and the fourth contact K4 are the same, the second switch is closed, that is, the third contact K3 and the fourth contact K4 are closed, the second switch is opened, that is, the third contact K3 and the fourth contact K4 are opened, and when the fourth contact K4 is closed, the second switch sends a second signal to the software control end to inform the software control end that the second switch is switched to the closed state.
According to one embodiment of the present application, the battery cell includes a battery E1, a first resistor R1, a first diode D2, and a third switch K1. One end of the third switch K1 is connected with the anode of the power supply unit, the other end is connected with the anode of the first diode D2, the cathode of the first diode D2 is connected with the anode of the battery E1 through the first resistor R1, the anode of the battery E1 is connected with the coil of the first relay REL1, and is also connected with the normally open contact of the first relay REL1 through the first switch; the cathode of the battery E1 is connected to the negative electrode of the power supply unit and also to the negative electrode of the output unit. Wherein, when the third switch K1 is closed, the power supply unit charges the battery E1 through the third switch K1, the first diode D2 and the first resistor R1.
According to an embodiment of the present application, the output unit includes a brake coil L1, a second diode D3, and a second resistor R2, an anode of the brake coil L1 is connected to one end of a normally closed contact of the second relay REL2 and is also connected to one end of a normally open contact of the third relay REL3, and a cathode of the brake coil L1 is connected to a cathode of the power supply unit and is also connected to one end of the second switch; the second diode D3 is connected in series with the second resistor R2 and then connected in parallel to two ends of the brake coil L1 for freewheeling of the brake coil L1, preferably, the second diode D3 may be a double diode connected in parallel, so as to be able to bear a larger current and perform a shunting function, and in addition, when one of the diodes is damaged, the other diode enables the circuit to continue to work.
According to one embodiment of the present application, the power supply unit includes an ac power source and a rectifier bridge D1, the rectifier bridge D1 is used for converting ac power provided by the ac power source into dc power. After the alternating current power supply is rectified by the rectifier bridge D1, the positive electrode of the alternating current power supply is respectively connected with the battery unit and the third relay REL3, and the negative electrode of the alternating current power supply is connected with the negative electrode of the output unit.
The application also provides a brake control device, which comprises the brake control circuit.
The application also proposes a device comprising a brake control device according to the preceding description.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A brake control circuit, the circuit comprising: the control unit comprises a first relay, a second relay, a third relay, a first switch and a second switch;
the negative pole of the power supply unit is connected with the negative pole of the output unit, the positive pole of the power supply unit is connected with one end of a third relay normally open contact, the other end of the third relay normally open contact is connected with the positive pole of the output unit, a coil of the third relay is connected with the software control end, the software control end is also connected with the first switch and the second switch respectively, the anode of the battery unit is connected with one end of the first relay coil, the other end of the first relay coil is connected with the negative pole of the output unit through the second switch and is connected with the cathode of the battery unit, one end of the first relay normally open contact is connected with the anode of the battery unit through the first switch, and the other end of the first relay normally open contact is connected with one end of the second relay normally closed contact, the other end of the normally closed contact of the second relay is connected with the anode of the output unit, and a coil of the second relay is connected with a system power supply;
when the first switch is turned off, the control circuit is switched to a normally open type braking mode, and when the first switch is turned off, the control circuit is switched to a normally closed type braking mode.
2. The circuit of claim 1, wherein the first switch comprises a first contact and a second contact, wherein the second switch comprises a third contact and a fourth contact,
one end of the first contact is connected with the anode of the battery unit, the other end of the first contact is connected with the normally open contact of the first relay, and the second contact is connected with the software control end;
one end of the third contact is connected with the coil of the first relay, the other end of the third contact is connected with the negative electrode of the output unit and the cathode of the battery unit, and the fourth contact is connected with the software control end.
3. The circuit of claim 1, wherein the battery cell comprises a battery, a first resistor, a first diode, and a third switch,
one end of the third switch is connected with the anode of the power supply unit, the other end of the third switch is connected with the anode of the first diode, the cathode of the first diode is connected with the anode of the battery through the first resistor, the anode of the battery is connected with the coil of the first relay, and the third switch is also connected with the normally open contact of the first relay through the first switch; the cathode of the battery is connected with the negative electrode of the power supply unit and also connected with the negative electrode of the output unit;
when the third switch is closed, the power supply unit charges the battery through the third switch, the first diode and the first resistor.
4. The circuit of claim 1, wherein the output unit comprises a brake coil, a second diode, and a second resistor,
the positive electrode of the brake coil is connected with one end of the normally closed contact of the second relay and is also connected with one end of the normally open contact of the third relay, and the negative electrode of the brake coil is connected with the negative electrode of the power supply unit and is also connected with one end of the second switch; and the second diode is connected in series with the second resistor and then connected in parallel with two ends of the brake coil and used for afterflow of the brake coil.
5. The circuit of claim 1, wherein the power supply unit comprises an AC power source and a rectifier bridge,
after the alternating current power supply is rectified by the rectifier bridge, the positive electrode of the alternating current power supply is respectively connected with the battery unit and the third relay, and the negative electrode of the alternating current power supply is connected with the negative electrode of the output unit.
6. A brake control apparatus, characterized in that the apparatus comprises a brake control circuit according to any one of claims 1 to 5.
7. An apparatus, characterized in that the apparatus comprises a brake control device according to claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111217400.4A CN113839585B (en) | 2021-10-19 | 2021-10-19 | Brake control circuit, device and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111217400.4A CN113839585B (en) | 2021-10-19 | 2021-10-19 | Brake control circuit, device and equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113839585A true CN113839585A (en) | 2021-12-24 |
| CN113839585B CN113839585B (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111217400.4A Active CN113839585B (en) | 2021-10-19 | 2021-10-19 | Brake control circuit, device and equipment |
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| CN (1) | CN113839585B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1331260A (en) * | 1970-05-15 | 1973-09-26 | J T Electrical Controls Ltd | Braking of rotary electrical machines |
| JPS5274816A (en) * | 1975-11-25 | 1977-06-23 | Gen Electric | Motor control circuit |
| CN2741948Y (en) * | 2004-05-24 | 2005-11-23 | 孔凡华 | Controller for AC crane speed regulation |
| CN201667626U (en) * | 2010-01-16 | 2010-12-08 | 刘勇 | Electrocar motor brake |
| CN103326635A (en) * | 2012-03-23 | 2013-09-25 | 海洋王照明科技股份有限公司 | Direct current motor braking circuit |
| CN203368377U (en) * | 2013-07-22 | 2013-12-25 | Asco电力技术公司 | Control circuit and switch apparatus |
| CN211744375U (en) * | 2020-01-21 | 2020-10-23 | 漳州市安麟机电研究所有限公司 | Fire prevention keeps off cigarette motor brake circuit |
-
2021
- 2021-10-19 CN CN202111217400.4A patent/CN113839585B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1331260A (en) * | 1970-05-15 | 1973-09-26 | J T Electrical Controls Ltd | Braking of rotary electrical machines |
| JPS5274816A (en) * | 1975-11-25 | 1977-06-23 | Gen Electric | Motor control circuit |
| CN2741948Y (en) * | 2004-05-24 | 2005-11-23 | 孔凡华 | Controller for AC crane speed regulation |
| CN201667626U (en) * | 2010-01-16 | 2010-12-08 | 刘勇 | Electrocar motor brake |
| CN103326635A (en) * | 2012-03-23 | 2013-09-25 | 海洋王照明科技股份有限公司 | Direct current motor braking circuit |
| CN203368377U (en) * | 2013-07-22 | 2013-12-25 | Asco电力技术公司 | Control circuit and switch apparatus |
| CN211744375U (en) * | 2020-01-21 | 2020-10-23 | 漳州市安麟机电研究所有限公司 | Fire prevention keeps off cigarette motor brake circuit |
Non-Patent Citations (1)
| Title |
|---|
| 许建平: "桥门式起重机平移机构制动装置的研制与应用", 机床电器, no. 06, pages 49 - 50 * |
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| Publication number | Publication date |
|---|---|
| CN113839585B (en) | 2024-04-02 |
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