CN112614727A - Mechanical interlocking device of multiple devices - Google Patents
Mechanical interlocking device of multiple devices Download PDFInfo
- Publication number
- CN112614727A CN112614727A CN202011560976.6A CN202011560976A CN112614727A CN 112614727 A CN112614727 A CN 112614727A CN 202011560976 A CN202011560976 A CN 202011560976A CN 112614727 A CN112614727 A CN 112614727A
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- switch
- ratchet wheel
- wheel
- main shaft
- interlocking
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- 230000007547 defect Effects 0.000 abstract description 5
- 238000004880 explosion Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/04—Interlocking mechanisms
- H01H31/10—Interlocking mechanisms for interlocking two or more switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
- H01H2009/265—Interlocking, locking, or latching mechanisms for interlocking two or more switches with interlocking of more than two switches
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention provides a mechanical interlocking device of multiple devices, which comprises at least two switch body interlocking structures and a switch body interlocking mechanism interlocking with the switch bodies, wherein each switch body interlocking structure comprises a first ratchet wheel arranged on a main shaft of an isolating switch, a second ratchet wheel and a third ratchet wheel arranged on a main shaft of a breaker switch and a ratchet wheel interlocking mechanism interlocking the first ratchet wheel and the second ratchet wheel, the ratchet wheel interlocking mechanism limits the rotation of the second ratchet wheel when the isolating switch is switched off and further limits the switching-on of a breaker switch, and the switch body interlocking mechanism can limit the rotation of the third ratchet wheel in the interlocking structure of the adjacent switch body when the third ratchet wheel rotates and further limits the switching-on of the breaker switch in the interlocking structure of the adjacent switch body. The switch body linkage mechanism and the ratchet wheel linkage mechanism can effectively overcome the defects that the existing spare power automatic switching scheme can only realize electric locking and cannot realize locking manual button operation.
Description
Technical Field
The invention relates to an interlocking device, in particular to a mechanical interlocking device for multiple devices.
Background
Along with the increasing modernization degree of the living standard of people in China, the demand and the dependence degree of people on electric power are increased, the requirement on the quality of electric energy is stricter, and the requirements on the reliability and the safety of power supply are higher and higher. In the prior art, a standby incoming line automatic switching device is arranged in a main and standby two-circuit and multi-circuit power supply circuit, and when a bus fails and cannot supply power, a standby circuit is switched in to supply power, so that the power supply reliability is improved. However, in practical use, the main supply line and the standby line in the switch cabinet cannot be connected simultaneously, otherwise, the safety accidents of short circuit, fire and even explosion can occur.
Therefore, at present, in order to prevent the main supply line and the standby supply line from being simultaneously connected, an electrical interlocking mode and a mechanical interlocking mode are generally adopted, wherein the mechanical interlocking can also prevent the main supply line and the standby supply line from being simultaneously connected due to manual switching-on by manual misoperation.
The current electric interlocking commonly-used circuit breaker auxiliary contact mode; the mechanical interlocking generally adopts a mode of locking two and locking one key, namely, only when one circuit breaker is opened, the key can be locked, and the same key can be used for operating the other circuit breaker to be closed. And the double-power-supply incoming line needs to realize the automatic switching of the automatic.
Disclosure of Invention
In view of the defects of the existing interlocking device, the invention provides a mechanical interlocking device for multiple devices, which can effectively solve the defects that the existing spare power automatic switching scheme can only realize electric locking and can not realize locking manual button operation and the technical problems that the safety accident is caused by the simultaneous closing of a main power supply incoming line and a spare power supply incoming line is easy to happen.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a mechanical interlock of many equipment, the mechanical interlock of many equipment includes two at least switch body interlocking structure and interlock switch body interlock mechanism of interlock switch body, switch body interlocking structure is including setting up the first ratchet on the isolator main shaft, setting up second ratchet and third ratchet and the ratchet interlock mechanism of interlock first ratchet and second ratchet on the circuit breaker switch main shaft, ratchet interlock mechanism restricts the second ratchet and rotates when making isolator separating brake, and then restricts the circuit breaker switch and close a floodgate, switch body interlock mechanism can restrict the third ratchet in the adjacent switch body interlocking structure when the third ratchet rotates and rotate, and then restrict the circuit breaker switch in the adjacent switch body interlocking structure and close a floodgate.
According to one aspect of the invention, the ratchet wheel linkage mechanism comprises a ratchet wheel connecting rod, an upper limiting wheel and a lower limiting wheel which are arranged at the upper end and the lower end of the ratchet wheel connecting rod, grooves are formed in the first ratchet wheel and the second ratchet wheel, the connecting line of the isolating switch main shaft and the breaker switch main shaft is perpendicular to the ground, and the ratchet wheel connecting rod is arranged on the connecting line of the isolating switch main shaft and the breaker switch main shaft.
According to one aspect of the invention, the ratchet wheel linkage mechanism further comprises an upper limiting rod and a lower limiting rod, the upper limiting wheel and the lower limiting wheel are respectively arranged on the upper limiting rod and the lower limiting rod through shaft sleeves, and the upper limiting rod and the lower limiting rod are movably arranged on the equipment body.
According to one aspect of the invention, one end of the upper limiting rod and one end of the lower limiting rod are movably arranged on the equipment body through the shaft sleeve.
According to one aspect of the invention, the switch body linkage mechanism comprises a switch connecting rod, a left limiting wheel and a right limiting wheel which are arranged at the left end and the right end of the switch connecting rod, the third ratchet wheel is provided with a limiting groove, the connecting line of the main shaft of the circuit breaker switch and the main shaft of the circuit breaker switch in the adjacent switch body interlocking structure is parallel to the ground, and the switch connecting rod is arranged on the connecting line of the main shaft of the circuit breaker switch and the main shaft of the circuit breaker switch in the adjacent switch body interlocking structure.
According to one aspect of the invention, the switch body linkage mechanism further comprises a left limiting rod and a right limiting rod, and the left limiting wheel and the right limiting wheel are respectively arranged on the left limiting rod and the right limiting rod through shaft sleeves.
According to one aspect of the invention, the left limiting rod and the right limiting rod are arranged on adjacent equipment or on the other end of the upper limiting rod in the adjacent switch body interlocking structure through shaft sleeves.
According to one aspect of the invention, the limiting groove and the groove are arc-shaped grooves, the radian of the limiting groove is the same as that of the third ratchet wheel, and the radian of the groove is the same as that of the first ratchet wheel and the second ratchet wheel.
According to one aspect of the invention, the distance between the main shaft of the disconnector and the main shaft of the disconnector is greater than the length of the link plus the depth of the groove.
The implementation of the invention has the advantages that:
the invention provides a mechanical interlocking device of multiple devices, which comprises at least two switch body interlocking structures and a switch body interlocking mechanism interlocking with the switch bodies, wherein each switch body interlocking structure comprises a first ratchet wheel arranged on a main shaft of an isolating switch, a second ratchet wheel and a third ratchet wheel arranged on a main shaft of a breaker switch and a ratchet wheel interlocking mechanism interlocking the first ratchet wheel and the second ratchet wheel, the ratchet wheel interlocking mechanism limits the rotation of the second ratchet wheel when the isolating switch is switched off and further limits the switching-on of a breaker switch, and the switch body interlocking mechanism can limit the rotation of the third ratchet wheel in the interlocking structure of the adjacent switch body when the third ratchet wheel rotates and further limits the switching-on of the breaker switch in the interlocking structure of the adjacent switch body. The switch body linkage mechanism and the ratchet wheel linkage mechanism can effectively solve the defects that the existing spare power automatic switching scheme can only realize electric locking and cannot realize locking manual button operation, and the technical problems that a main power supply incoming line and a spare power supply incoming line are simultaneously switched on to cause safety accidents, which are easy to occur.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of a mechanical interlock device for multiple apparatuses according to the present invention;
fig. 2 is a schematic structural diagram of a multi-device mechanical interlocking device installed on development equipment according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
As shown in fig. 1-2, the mechanical interlocking device of multiple devices includes at least two switch body interlocking structures and a switch body interlocking mechanism interlocking with the switch bodies, where the switch body interlocking structures include a first ratchet 2 disposed on a main shaft 1 of an isolation switch, a second ratchet 5 and a third ratchet 6 disposed on a main shaft 7 of a circuit breaker switch, and a ratchet interlocking mechanism interlocking the first ratchet 2 and the second ratchet 5, the ratchet interlocking mechanism restricts rotation of the second ratchet 5 when the isolation switch is opened, and further restricts closing of the circuit breaker switch, and the switch body interlocking mechanism restricts rotation of the third ratchet 6 in the adjacent switch body interlocking structure when the third ratchet 6 rotates, and further restricts closing of the circuit breaker switch in the adjacent switch body interlocking structure.
In this embodiment, the ratchet linkage mechanism includes a ratchet connecting rod-3, and an upper limit wheel 4-1 and a lower limit wheel 4-4 disposed at the upper and lower ends of the ratchet connecting rod-3, the first ratchet 2 and the second ratchet 5 are both provided with grooves 3, a connection line between the main shaft 1 of the disconnecting switch and the main shaft 7 of the circuit breaker switch is perpendicular to the ground, and the ratchet connecting rod-3 is disposed on a connection line between the main shaft 1 of the disconnecting switch and the main shaft 7 of the circuit breaker switch.
In order to realize the function that the ratchet linkage mechanism limits the rotation of the second ratchet wheel when the isolating switch is switched off and further limits the switching-on of the circuit breaker switch, the ratchet linkage mechanism can also adopt the following structure, comprising a guide rail arranged on the equipment, a slide block clamped in the guide rail, a slide rod arranged in the slide block, an upper limiting wheel and a lower limiting wheel which are arranged at two ends of the slide rod, grooves are arranged on the first ratchet wheel and the second ratchet wheel, and the guide rail is arranged on a connecting line of a main shaft of the isolating switch and a main shaft of the circuit breaker switch.
The ratchet wheel linkage mechanism can also adopt the following structure: the circuit breaker comprises a ratchet wheel connecting rod-3, an upper clamping block and a lower clamping block, wherein the upper clamping block and the lower clamping block are arranged at the upper end and the lower end of the ratchet wheel connecting rod-3, grooves 3 are formed in a first ratchet wheel 2 and a second ratchet wheel 5, the connecting line of a disconnecting switch main shaft 1 and a breaker switch main shaft 7 is perpendicular to the ground, and the ratchet wheel connecting rod-3 is arranged on the connecting line of the disconnecting switch main shaft 1 and the breaker switch main shaft 7.
In this embodiment, the ratchet linkage mechanism further includes an upper limit rod 4-2 and a lower limit rod 4-3, the upper limit wheel 4-1 and the lower limit wheel 4-4 are respectively arranged on the upper limit rod 4-2 and the lower limit rod 4-3 through shaft sleeves, and the upper limit rod 4-2 and the lower limit rod 4-3 are movably arranged on the device body.
In this embodiment, one end of the upper limiting rod 4-2 and one end of the lower limiting rod 4-3 are movably arranged on the device body through shaft sleeves.
In this embodiment, the switch body interlocking mechanism includes a switch connecting rod 8-3, and a left limit wheel 8-2 and a right limit wheel which are disposed at the left and right ends of the switch connecting rod 8-3, the third ratchet 6 is provided with a limit groove 9, a connection line between the breaker switch main shaft 7 and the breaker switch main shaft 7 in the adjacent switch body interlocking structure is parallel to the ground, and the switch connecting rod 8-3 is disposed on a connection line between the breaker switch main shaft 7 and the breaker switch main shaft 7 in the adjacent switch body interlocking structure.
In this embodiment, the switch body linkage mechanism further includes a left limit rod 8-1 and a right limit rod, and the left limit wheel 8-2 and the right limit wheel are respectively disposed on the left limit rod 8-1 and the right limit rod through shaft sleeves.
In this embodiment, the left limiting rod 8-1 and the right limiting rod are both disposed on the adjacent device through a shaft sleeve or disposed on the other end of the upper limiting rod 4-2 in the adjacent switch body interlocking structure.
In this embodiment, the limiting groove 9 and the groove 3 are both arc-shaped grooves 3, the radian of the limiting groove 9 is the same as that of the third ratchet wheel 6, and the radian of the groove 3 is the same as that of the first ratchet wheel 2 and the second ratchet wheel 5.
In this embodiment, the distance between the disconnector main shaft 1 and the disconnector main shaft 7 is greater than the length of the link plus the depth of the recess 3.
In order to realize the function that the ratchet wheel linkage mechanism limits the rotation of the second ratchet wheel when the disconnecting switch is switched off and further limits the switching-on of the circuit breaker switch, the ratchet wheel linkage mechanism can also adopt the following structure, comprising a guide rail arranged on the equipment, a slide block clamped in the guide rail, a slide rod arranged in the slide block, and a left limit wheel and a right limit wheel arranged at two ends of the slide rod, wherein the guide rail is arranged on a connecting line of a circuit breaker switch main shaft and a circuit breaker switch main shaft in an adjacent switch body interlocking structure.
In practical use, in order to limit the rotation angle of the ratchet wheel, a ratchet wheel limiting structure is arranged, the first ratchet wheel, the second ratchet wheel and the third ratchet wheel are all provided with limiting structures, each limiting structure comprises a limiting groove arranged on the ratchet wheel and a limiting rod arranged on the equipment body, the limiting rods are arranged in the limiting grooves, and when the ratchet wheel rotates, the limiting grooves can limit the rotation angle of the ratchet wheel.
The working principle is as follows:
when the disconnecting switch is in a switching-off state, the first ratchet wheel rotates, the lower limiting wheel is propped by the first ratchet wheel to move upwards, the upper limiting wheel props against a second ratchet wheel arranged on a main shaft of the breaker switch, and the breaker switch positioned at the switching-off position cannot be switched on; when the disconnecting switch is in a switching-on position, the first ratchet wheel groove is aligned to the lower limiting wheel, and at the moment, the breaker switch in the switching-off position can perform switching-on operation; otherwise, when the breaker switch is located at the switching-on position, the second ratchet wheel can prop against the upper limiting wheel to drive the ratchet wheel connecting rod to move downwards, the lower limiting wheel can prop against the first ratchet wheel groove, and at the moment, the disconnecting switch cannot be switched off, so that the circuit breaker switch and the disconnecting switch are interlocked.
The two switch cabinets are in switch interlocking and consist of a third ratchet wheel, a left limit wheel, a switch connecting rod, a third ratchet wheel of the other switch and a right limit wheel, when the two switch cabinet isolating switches are simultaneously in a switch-on state, when the first switch is positioned at a switch-on position, the third ratchet wheel arranged on a main shaft of the circuit breaker can prop against the left limit wheel of the first switch, the switch connecting rod can move rightwards, the left limit wheel of the second switch can prop against a limit groove of the third ratchet wheel of the second switch, and the circuit breaker of the second switch can not carry out switch-on operation; on the contrary, the two incoming line switches are the same, the scheme can realize that the two switches cannot be switched on simultaneously, and the safety accidents of short circuit, fire and even explosion caused by the simultaneous switching on of the two incoming line switches are avoided.
The implementation of the invention has the advantages that:
the invention provides a mechanical interlocking device of multiple devices, which comprises at least two switch body interlocking structures and a switch body interlocking mechanism interlocking with the switch bodies, wherein each switch body interlocking structure comprises a first ratchet wheel arranged on a main shaft of an isolating switch, a second ratchet wheel and a third ratchet wheel arranged on a main shaft of a breaker switch and a ratchet wheel interlocking mechanism interlocking the first ratchet wheel and the second ratchet wheel, the ratchet wheel interlocking mechanism limits the rotation of the second ratchet wheel when the isolating switch is switched off and further limits the switching-on of a breaker switch, and the switch body interlocking mechanism can limit the rotation of the third ratchet wheel in the interlocking structure of the adjacent switch body when the third ratchet wheel rotates and further limits the switching-on of the breaker switch in the interlocking structure of the adjacent switch body. The switch body linkage mechanism and the ratchet wheel linkage mechanism can effectively solve the defects that the existing spare power automatic switching scheme can only realize electric locking and cannot realize locking manual button operation, and the technical problems that a main power supply incoming line and a spare power supply incoming line are simultaneously switched on to cause safety accidents, which are easy to occur.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed herein are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A mechanical interlock for multiple devices, comprising: the mechanical interlocking device of the multiple devices comprises at least two switch body interlocking structures and a switch body interlocking mechanism interlocking with the switch bodies, wherein each switch body interlocking structure comprises a first ratchet wheel arranged on a main shaft of a disconnecting switch, a second ratchet wheel and a third ratchet wheel arranged on the main shaft of a circuit breaker switch and a ratchet wheel interlocking mechanism interlocking the first ratchet wheel and the second ratchet wheel, the ratchet wheel interlocking mechanism limits the rotation of the second ratchet wheel when the disconnecting switch is switched off and further limits the switching-on of a circuit breaker switch, and the switch body interlocking mechanism can limit the rotation of the third ratchet wheel in the adjacent switch body interlocking structure when the third ratchet wheel rotates and further limits the switching-on of the circuit breaker switch in the adjacent switch body interlocking structure.
2. A multiple device mechanical interlock as defined in claim 1, wherein: the ratchet wheel linkage mechanism comprises a ratchet wheel connecting rod, an upper limiting wheel and a lower limiting wheel, the upper limiting wheel and the lower limiting wheel are arranged at the upper end and the lower end of the ratchet wheel connecting rod, grooves are formed in the first ratchet wheel and the second ratchet wheel, the connecting line of the isolating switch main shaft and the breaker switch main shaft is perpendicular to the ground, and the ratchet wheel connecting rod is arranged on the connecting line of the isolating switch main shaft and the breaker switch main shaft.
3. A multiple device mechanical interlock as defined in claim 2, wherein: the ratchet wheel linkage mechanism further comprises an upper limiting rod and a lower limiting rod, the upper limiting wheel and the lower limiting wheel are respectively arranged on the upper limiting rod and the lower limiting rod through shaft sleeves, and the upper limiting rod and the lower limiting rod are movably arranged on the equipment body.
4. A multiple device mechanical interlock as defined in claim 3, wherein: one end of the upper limiting rod and one end of the lower limiting rod are movably arranged on the equipment body through shaft sleeves.
5. A multiple device mechanical interlock as defined in claim 1, wherein: the switch body linkage mechanism comprises a switch connecting rod, a left limiting wheel and a right limiting wheel, the left limiting wheel and the right limiting wheel are arranged at the left end and the right end of the switch connecting rod, a limiting groove is formed in the third ratchet wheel, a connecting line of a breaker switch main shaft and a circuit breaker switch main shaft in an adjacent switch body interlocking structure is parallel to the ground, and the switch connecting rod is arranged on the connecting line of the breaker switch main shaft and the circuit breaker switch main shaft in the adjacent switch body interlocking structure.
6. A multiple device mechanical interlock as defined in claim 5, wherein: switch body link gear still includes left gag lever post and right gag lever post, left side spacing wheel all sets up respectively on left gag lever post and right gag lever post with right spacing wheel through the axle sleeve.
7. A multiple device mechanical interlock as defined in claim 6, wherein: the left limiting rod and the right limiting rod are arranged on adjacent equipment or on the other end of the upper limiting rod in the adjacent switch body interlocking structure through shaft sleeves.
8. A multiple device mechanical interlock as claimed in any one of claims 1 to 7, wherein: the limiting groove and the groove are arc-shaped grooves, the radian of the limiting groove is the same as that of the third ratchet wheel, and the radian of the groove is the same as that of the first ratchet wheel and that of the second ratchet wheel.
9. A multiple device mechanical interlock as defined in claim 8, wherein: the distance between the main shaft of the isolating switch and the main shaft of the breaker switch is larger than the length of the connecting rod plus the depth of the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011560976.6A CN112614727A (en) | 2020-12-25 | 2020-12-25 | Mechanical interlocking device of multiple devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011560976.6A CN112614727A (en) | 2020-12-25 | 2020-12-25 | Mechanical interlocking device of multiple devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112614727A true CN112614727A (en) | 2021-04-06 |
Family
ID=75245073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011560976.6A Pending CN112614727A (en) | 2020-12-25 | 2020-12-25 | Mechanical interlocking device of multiple devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112614727A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1758393A (en) * | 2004-10-06 | 2006-04-12 | 三菱电机株式会社 | Operation devcie for three-position opener |
| EP2346055A1 (en) * | 2010-01-13 | 2011-07-20 | Kabushiki Kaisha Toshiba | Switch operating device |
| CN206225271U (en) * | 2016-11-17 | 2017-06-06 | 湖南平高开关有限公司 | On-load switch |
| JP2018179113A (en) * | 2017-04-11 | 2018-11-15 | 株式会社クボタ | Transmission device of work machine |
| CN109515727A (en) * | 2018-12-07 | 2019-03-26 | 贵州华阳电工有限公司 | The positive and negative push rod of throttle platform interlocks transmission mechanism |
-
2020
- 2020-12-25 CN CN202011560976.6A patent/CN112614727A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1758393A (en) * | 2004-10-06 | 2006-04-12 | 三菱电机株式会社 | Operation devcie for three-position opener |
| EP2346055A1 (en) * | 2010-01-13 | 2011-07-20 | Kabushiki Kaisha Toshiba | Switch operating device |
| CN206225271U (en) * | 2016-11-17 | 2017-06-06 | 湖南平高开关有限公司 | On-load switch |
| JP2018179113A (en) * | 2017-04-11 | 2018-11-15 | 株式会社クボタ | Transmission device of work machine |
| CN109515727A (en) * | 2018-12-07 | 2019-03-26 | 贵州华阳电工有限公司 | The positive and negative push rod of throttle platform interlocks transmission mechanism |
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