CN110332303A - Gearbox protection system, method and excavator - Google Patents

Gearbox protection system, method and excavator Download PDF

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Publication number
CN110332303A
CN110332303A CN201910579009.5A CN201910579009A CN110332303A CN 110332303 A CN110332303 A CN 110332303A CN 201910579009 A CN201910579009 A CN 201910579009A CN 110332303 A CN110332303 A CN 110332303A
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CN
China
Prior art keywords
gearbox
controller
temperature
real time
alarm
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201910579009.5A
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Chinese (zh)
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CN110332303B (en
Inventor
杨赋
孙东来
李春德
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Sany Heavy Machinery Ltd
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Sany Heavy Machinery Ltd
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Priority to CN201910579009.5A priority Critical patent/CN110332303B/en
Publication of CN110332303A publication Critical patent/CN110332303A/en
Application granted granted Critical
Publication of CN110332303B publication Critical patent/CN110332303B/en
Active legal-status Critical Current
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/0412Cooling or heating; Control of temperature
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/02Means for indicating or recording specially adapted for thermometers
    • G01K1/024Means for indicating or recording specially adapted for thermometers for remote indication
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/08Protective devices, e.g. casings
    • G01K1/12Protective devices, e.g. casings for preventing damage due to heat overloading
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00Thermometers specially adapted for specific purposes

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Control Of Transmission Device (AREA)

Abstract

The present invention relates to a kind of gearbox protection systems, method and excavator, the gearbox protection system includes temperature sensor, electric slip ring, warning note device and controller, temperature sensor is set to gearbox outer surface and is connected by electric slip ring with controller, temperature sensor is for obtaining gearbox real time temperature and being transformed into electric signal, electric slip ring is used to electric signal being sent to controller, controller is used to judge whether gearbox real time temperature is more than preset temperature threshold according to electric signal, when gearbox real time temperature is more than preset temperature threshold, controller generates gearbox protection and instructs and be sent to warning note device.By the gearbox protection system, the temperature information of gearbox can be obtained in real time, so that gearbox protection instruction can be timely generated when high temperature occurs in gearbox, to realize the real-time guard to gearbox.

Description

Gearbox protection system, method and excavator
Technical field
The present invention relates to machinery field more particularly to a kind of gearbox protection systems, method and excavator.
Background technique
Wheel excavator is generally divided into mining mode and walking mode.Wherein, under walking mode, excavator is needed each Transition is carried out between a building site.However, wheel excavator, in the case where running at high speed for a long time, high temperature can occur for gearbox presence Risk.After high temperature occurs for gearbox, if continuing to travel, heat dissipation not in time, often damages gearbox life, even results in change Fast case cisco unity malfunction.
Summary of the invention
In consideration of it, providing a kind of gearbox protection system, it is capable of the temperature information of real-time monitoring gearbox, when gearbox goes out When existing high temperature, warning note is timely obtained, to realize the protection to gearbox.
A kind of gearbox protection system includes: temperature sensor, electric slip ring, warning note device and controller, and temperature passes Sensor is set to gearbox outer surface and is connected by electric slip ring with controller;
Temperature sensor is for obtaining gearbox real time temperature and being transformed into electric signal;
Electric slip ring is used to electric signal being sent to controller;
Controller is used to judge whether gearbox real time temperature is more than preset temperature threshold according to electric signal;
When gearbox real time temperature is more than preset temperature threshold, controller generates gearbox protection and instructs and be sent to report Alert suggestion device.
In one embodiment, warning note device includes alarm, and gearbox protection instruction includes gearbox high temperature report Alert instruction, alarm are used to receive the gearbox that controller is sent when gearbox real time temperature is more than preset temperature threshold high Warm alarm command is to alarm.
In one embodiment, warning note device includes display, and gearbox protection instruction includes that manual shut-down prompts Instruction, display are used to receive the manual shut-down that controller is sent when gearbox real time temperature is more than preset temperature threshold and mention Show and instructs and shown.
In one embodiment, controller is also used to after issuing manual shut-down hint instructions, detection engine whether It is closed in first preset time range;
When engine is not closed in the first preset time, controller, which is also used to control engine, reduces revolving speed.
In one embodiment, controller is also used to detect whether engine is closed in the second preset time, control Device is also used to when engine is not closed in the second preset time, controls engine self-stopping.
In addition, also providing a kind of gearbox guard method, gearbox guard method includes:
Receive the electric signal for the gearbox real time temperature that temperature sensor is uploaded by electric slip ring;
Judge whether gearbox real time temperature is more than preset temperature threshold according to electric signal;
When gearbox real time temperature is more than preset temperature threshold, generates gearbox protection and instruct and be sent to warning note Device.
In one embodiment, warning note device includes alarm, and gearbox protection instruction includes gearbox high temperature report Alert instruction;
When gearbox real time temperature be more than preset temperature threshold when, send gearbox high temperature alarm instruct to alarm with into Row alarm.
In one embodiment, warning note device includes display, and gearbox protection instruction includes that manual shut-down prompts Instruction;
When gearbox real time temperature is more than preset temperature threshold, manual shut-down hint instructions are sent to display to carry out Display.
In one embodiment, after issuing manual shut-down hint instructions, whether engine is detected in the first preset time It is closed in range;
When engine is not closed in the first preset time, control engine reduces revolving speed.
In addition, also providing a kind of excavator, excavator uses above-mentioned gearbox protection system.
Above-mentioned gearbox protection system, including temperature sensor, electric slip ring, warning note device and controller, temperature pass Sensor is set to gearbox outer surface and is connected by electric slip ring with controller, and temperature sensor is for obtaining gearbox reality Shi Wendu is simultaneously transformed into electric signal, and electric slip ring is used to for electric signal being sent to controller, and controller according to electric signal for judging Whether gearbox real time temperature is more than preset temperature threshold, when gearbox real time temperature is more than preset temperature threshold, controller It generates gearbox protection to instruct and be sent to warning note device, the temperature information of gearbox can be obtained in real time, thus when becoming Fast case can timely generate gearbox protection instruction when there is high temperature, to realize the real-time guard to gearbox.
Detailed description of the invention
In order to illustrate more clearly of technical solution of the present invention, letter will be made to attached drawing needed in the embodiment below It singly introduces, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as to the present invention The restriction of protection scope.In various figures, part is similarly comprised using similar number.
Fig. 1 is a kind of structural block diagram of gearbox protection system in one embodiment of the invention;
Fig. 2 is a kind of structural block diagram of warning note device in one embodiment of the invention;
Fig. 3 is a kind of gearbox guard method in one embodiment of the invention;
Fig. 4 is a kind of gearbox guard method in another embodiment of the present invention;
Fig. 5 is a kind of gearbox guard method in another embodiment of the present invention.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
The component of embodiments of the present invention, which are generally described and illustrated herein in the accompanying drawings can be come with a variety of different configurations Arrangement and design.Therefore, requirement is not intended to limit to the detailed description of the embodiment of the present invention provided in the accompanying drawings below The scope of the present invention of protection, but it is merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, this field skill Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects It encloses.
Hereinafter, the various embodiments of the disclosure will be described more fully.The disclosure can have various embodiments, and It can adjust and change wherein.It should be understood, however, that: there is no the various embodiments of the disclosure are limited to spy disclosed herein Determine the intention of embodiment, but the disclosure should be interpreted as in the spirit and scope for covering the various embodiments for falling into the disclosure All adjustment, equivalent and/or optinal plan.
Hereinafter, term " includes ", " having " and its cognate that can be used in various embodiments of the present invention are only It is intended to mean that special characteristic, number, step, operation, the combination of element, component or aforementioned item, and is understood not to first Exclude the combined presence or increase by one of one or more other features, number, step, operation, element, component or aforementioned item A or more feature, number, step, operation, element, component or aforementioned item combination a possibility that.
In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, it is not understood to indicate or imply Relative importance.
Unless otherwise defined, otherwise all terms (including technical terms and scientific terms) used herein have and this The identical meaning of the various normally understood meanings of embodiment one skilled in the art of invention.The term (such as exists The term limited in the dictionary generally used) it is to be interpreted as that there is contain identical with situational meaning in the related technical field Justice and Utopian meaning or meaning too formal will be interpreted as having, unless in various embodiments of the present invention It is clearly defined.
Fig. 1 is a kind of structural block diagram of gearbox protection system 100 in one embodiment, the gearbox protection system 100 It include: temperature sensor 110, electric slip ring 120, warning note device 130 and controller 140, temperature sensor 110 is set to change Fast case outer surface is simultaneously connected by electric slip ring 120 with controller 140.
Wherein, temperature sensor 110 is for obtaining gearbox real time temperature and being transformed into electric signal;
Electric slip ring 120 is used to electric signal being sent to controller 140;
Controller 140 is used to judge whether gearbox real time temperature is more than preset temperature threshold according to electric signal;
When gearbox real time temperature is more than preset temperature threshold, controller 140 generates gearbox protection and instructs and send To warning note device 130.
Wherein, the outer surface of gearbox is arranged in temperature sensor 110, simple and easy, is conducive to quickly obtain change The real time temperature of fast case, so that controller 140 is accurately judged and generated gearbox protection instruction and is sent to report Alert suggestion device 130.
Above-mentioned gearbox protection system 100, including temperature sensor 110, electric slip ring 120, warning note device 130 and control Device 140 processed, temperature sensor 110 are set to gearbox outer surface and are connected by electric slip ring 120 with controller 140, temperature For obtaining gearbox real time temperature and being transformed into electric signal, electric slip ring 120 is used to electric signal being sent to control degree sensor 110 Device 140 processed, controller 140 work as speed change for judging whether gearbox real time temperature is more than preset temperature threshold according to electric signal When case real time temperature is more than preset temperature threshold, controller 140 generates gearbox protection and instructs and be sent to warning note device 130, the temperature information of gearbox can be obtained in real time, to can timely generate gearbox guarantor when high temperature occurs in gearbox Finger shield enables, to realize the real-time guard to gearbox.
In one embodiment, warning note device 130 includes alarm, and gearbox protection instruction includes gearbox high temperature Alarm command, when gearbox real time temperature is more than preset temperature threshold, alarm is used to receive the speed change of the transmission of controller 140 Case high temperature alarm is instructed to carry out warning note.
Wherein, warning note device 130 is internally provided with alarm, and alarm generally uses visual alarm and/or sound Sound alarm, gearbox protection instruction include that gearbox high temperature alarm instructs, when gearbox real time temperature is more than preset temperature threshold When value, alarm receives the gearbox high temperature alarm instruction that controller 140 is sent, and passes through visual alarm and/or audible alarm Device carries out warning note.
It is internally provided with alarm by warning note device 130, is conducive to user or driver and quickly obtains change The high temperature alarm information of fast case, in order to avoid gearbox is in the condition of high temperature for a long time, avoids becoming to take appropriate measures Fast case damage.
In one embodiment, warning note device 130 includes display, and gearbox protection instruction is mentioned including manual shut-down Show instruction, when gearbox real time temperature is more than preset temperature threshold, display is also used to receive the manual of the transmission of controller 140 It shuts down hint instructions and is shown.
Wherein, warning note device 130 is internally provided with display, before display is generally located on user or driver Side, gearbox protection instruction includes manual shut-down hint instructions, when gearbox real time temperature is more than preset temperature threshold, display Device receives the manual shut-down hint instructions that controller 140 is sent and is shown.
By the way that display is arranged inside warning note device 130, user or driver is enabled to quickly to obtain Manual shut-down hint instructions, in order to avoid gearbox is in the condition of high temperature for a long time, avoid to take corresponding manual shut-down measure Gearbox is caused to damage.
In one embodiment, as shown in Fig. 2, warning note device 130 simultaneously include display 132 and alarm 134, Display 132 is connected with controller 140 respectively with alarm 134, and gearbox protection instruction includes manual shut-down hint instructions It is instructed with gearbox high temperature alarm, when gearbox real time temperature is more than preset temperature threshold, controller 140 sends manual shut-down Hint instructions to display 132 is shown, while being sent gearbox high temperature alarm and being instructed to alarm 134, and light report is passed through Alert device and/or voice guard carry out warning note.
By the way that display 132 and alarm 134 is arranged simultaneously in the inside of warning note device 130, enable to user or Person driver quickly obtains the high temperature alarm information of gearbox, at the same by display 132 give user or driver with Manual shut-down hint instructions information, so that user is made to take corresponding manual shut-down hint instructions measure faster, in order to avoid speed change Case is in the condition of high temperature for a long time, avoids gearbox damage.
In one embodiment, controller 140 is also used to after issuing manual shut-down hint instructions, and whether detection engine It is closed in the first preset time range.
Wherein, it when display 132 shows manual shut-down hint instructions information, generally requires and gives user or operator Reaction time appropriate executes manual shut-down hint instructions, which is commonly referred to as the first preset time, and controller 140 exists After issuing manual shut-down hint instructions, further detect whether engine is closed in the first preset time range.
When engine is not closed in the first preset time, controller 140, which is also used to control engine, reduces revolving speed.
Wherein, due to the carelessness of user or operator, in the first preset time, manual shut-down hint instructions may It is not performed, engine is not closed in the first preset time, and controller 140 needs further to control engine reduction at this time Revolving speed can play the protective effect to gearbox to reduce torque output to a certain extent.
In one embodiment, when engine is not closed in the second preset time, controller 140 is also used to control Engine self-stopping.
Wherein, due to the carelessness of user or operator, when engine is not closed in the first preset time, control Device 140 processed is also used to detect whether engine is closed in the second preset time, when engine is not in the second preset time When being closed, engine self-stopping is controlled.
By the way that the second preset time is arranged, it can be ensured that engine self-stopping, to realize the protection for gearbox.
In addition, gearbox guard method includes: as shown in figure 3, also providing a kind of gearbox guard method
Step S210 receives the electric signal for the gearbox real time temperature that temperature sensor is uploaded by electric slip ring.
Step S220 judges whether gearbox real time temperature is more than preset temperature threshold according to electric signal.
Step S230 generates gearbox protection and instructs and send when gearbox real time temperature is more than preset temperature threshold To warning note device.
In one embodiment, warning note device includes alarm, and gearbox protection instruction includes gearbox high temperature report Alert instruction, step S230 include:
When gearbox real time temperature be more than preset temperature threshold when, send gearbox high temperature alarm instruct to alarm with into Row alarm.
In one embodiment, warning note device includes display, and gearbox protection instruction includes that manual shut-down prompts Instruction, step S230 include:
When gearbox real time temperature is more than preset temperature threshold, manual shut-down hint instructions are sent to display to carry out Display.
In one embodiment, as shown in figure 4, the above method further include:
Step S240 detects engine whether in the first preset time range after issuing manual shut-down hint instructions It is closed.
Step S250, when engine is not closed in the first preset time, control engine reduces revolving speed.
In one embodiment, as shown in figure 5, the above method further include:
Whether step S260, detection engine are closed in the second preset time range.
Step S270, when engine is not closed in the second preset time, controller controls engine self-stopping.
In addition, also providing a kind of excavator, excavator uses above-mentioned gearbox protection system.
In one embodiment, above-mentioned excavator is excavator.
In several embodiments provided herein, it should be understood that disclosed device and method can also pass through Other modes are realized.The apparatus embodiments described above are merely exemplary, for example, flow chart and structure in attached drawing Figure shows the system frame in the cards of the device of multiple embodiments according to the present invention, method and computer program product Structure, function and operation.In this regard, each box in flowchart or block diagram can represent a module, section or code A part, a part of the module, section or code includes one or more for implementing the specified logical function Executable instruction.It should also be noted that function marked in the box can also be to be different from the implementation as replacement The sequence marked in attached drawing occurs.For example, two continuous boxes can actually be basically executed in parallel, they are sometimes It can execute in the opposite order, this depends on the function involved.It is also noted that in structure chart and/or flow chart The combination of each box and the box in structure chart and/or flow chart, can function or movement as defined in executing it is dedicated Hardware based system realize, or can realize using a combination of dedicated hardware and computer instructions.
In addition, each functional module or unit in each embodiment of the present invention can integrate one independence of formation together Part, be also possible to modules individualism, an independent part can also be integrated to form with two or more modules.
It, can be with if the function is realized and when sold or used as an independent product in the form of software function module It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be intelligence Can mobile phone, personal computer, server or network equipment etc.) execute each embodiment the method for the present invention whole or Part steps.And storage medium above-mentioned include: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), Random access memory (RAM, Random Access Memory), magnetic or disk etc. be various to can store program code Medium.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain Lid is within protection scope of the present invention.

Claims (10)

1. a kind of gearbox protection system, which is characterized in that the gearbox protection system include: temperature sensor, electric slip ring, Warning note device and controller, the temperature sensor be set to gearbox outer surface and by the electric slip ring with it is described Controller is connected;
The temperature sensor is for obtaining gearbox real time temperature and being transformed into electric signal;
The electric slip ring is used to the electric signal being sent to the controller;
The controller for judging whether the gearbox real time temperature is more than preset temperature threshold according to the electric signal;
When the gearbox real time temperature is more than preset temperature threshold, the controller generates gearbox protection and instructs and send To the warning note device.
2. gearbox protection system according to claim 1, which is characterized in that the warning note device includes alarm Device, the gearbox protection instruction include that gearbox high temperature alarm instructs, and the alarm is used for when the gearbox is warm in real time When degree is more than preset temperature threshold, receives the gearbox high temperature alarm that the controller is sent and instruct to alarm.
3. gearbox protection system according to claim 1, which is characterized in that the warning note device includes display Device, the gearbox protection instruction include manual shut-down hint instructions, and the display is used to work as the gearbox real time temperature When more than preset temperature threshold, receives the manual shut-down hint instructions that the controller is sent and shown.
4. gearbox protection system according to claim 3, which is characterized in that the controller is also used to described in the sending After manual shut-down hint instructions, whether detection engine is closed in the first preset time range;
When the engine is not closed in first preset time, the controller is also used to control the engine Reduce revolving speed.
5. gearbox protection system according to claim 4, which is characterized in that the controller is also used to detect engine Whether it is closed in the second preset time, the controller is also used to when the engine is not in second preset time When being closed, the engine self-stopping is controlled.
6. a kind of gearbox guard method, which is characterized in that the gearbox guard method includes:
Receive the electric signal for the gearbox real time temperature that temperature sensor is uploaded by electric slip ring;
Judge whether the gearbox real time temperature is more than preset temperature threshold according to the electric signal;
When the gearbox real time temperature is more than preset temperature threshold, generates gearbox protection and instruct and be sent to warning note Device.
7. gearbox guard method according to claim 6, which is characterized in that the warning note device includes alarm Device, the gearbox protection instruction include that gearbox high temperature alarm instructs;
When the gearbox real time temperature is more than preset temperature threshold, sends the gearbox high temperature alarm and instruct to the report Alert device is to alarm.
8. gearbox guard method according to claim 6, which is characterized in that the warning note device includes display Device, the gearbox protection instruction includes manual shut-down hint instructions;
When the gearbox real time temperature is more than preset temperature threshold, the manual shut-down hint instructions are sent to the display Device is to be shown.
9. gearbox guard method according to claim 8, which is characterized in that issuing the manual shut-down hint instructions Afterwards, whether detection engine is closed in the first preset time range;
When the engine is not closed in first preset time, controlling the engine reduces revolving speed.
10. a kind of excavator, which is characterized in that the excavator is using gearbox described in any one of claim 1-5 Protection system.
CN201910579009.5A 2019-06-28 2019-06-28 Gearbox protection system and method and excavator Active CN110332303B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910579009.5A CN110332303B (en) 2019-06-28 2019-06-28 Gearbox protection system and method and excavator

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Application Number Priority Date Filing Date Title
CN201910579009.5A CN110332303B (en) 2019-06-28 2019-06-28 Gearbox protection system and method and excavator

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CN110332303A true CN110332303A (en) 2019-10-15
CN110332303B CN110332303B (en) 2020-11-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111535392A (en) * 2020-05-08 2020-08-14 三一重机有限公司 Walking control method and walking control device for wheel type excavator and wheel type excavator

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Publication number Priority date Publication date Assignee Title
US5716134A (en) * 1995-02-13 1998-02-10 Mercedes Benz Ag Device for detecting the temperature of a gearbox
CN202074015U (en) * 2011-05-24 2011-12-14 庄河市天成机械有限公司 Self-protecting gearbox
CN104315126A (en) * 2014-09-02 2015-01-28 潘树东 Gear reducer box with temperature alarm
CN204851453U (en) * 2015-07-27 2015-12-09 无锡硕卓电气科技有限公司 Take controller of CAN bus
CN207349403U (en) * 2017-08-01 2018-05-11 新昌县澄潭镇科创机械配件厂 A kind of gearbox of new-energy automobile
CN108591448A (en) * 2018-07-12 2018-09-28 盛瑞传动股份有限公司 Automatic gear-box guard method and automatic gear-box
CN208085587U (en) * 2018-04-21 2018-11-13 朱海恋 A kind of speed change control equipment for electric automobile

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5716134A (en) * 1995-02-13 1998-02-10 Mercedes Benz Ag Device for detecting the temperature of a gearbox
CN202074015U (en) * 2011-05-24 2011-12-14 庄河市天成机械有限公司 Self-protecting gearbox
CN104315126A (en) * 2014-09-02 2015-01-28 潘树东 Gear reducer box with temperature alarm
CN204851453U (en) * 2015-07-27 2015-12-09 无锡硕卓电气科技有限公司 Take controller of CAN bus
CN207349403U (en) * 2017-08-01 2018-05-11 新昌县澄潭镇科创机械配件厂 A kind of gearbox of new-energy automobile
CN208085587U (en) * 2018-04-21 2018-11-13 朱海恋 A kind of speed change control equipment for electric automobile
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111535392A (en) * 2020-05-08 2020-08-14 三一重机有限公司 Walking control method and walking control device for wheel type excavator and wheel type excavator

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