CN114001173A - Automatically controlled safe locking mechanism of industrial vehicle - Google Patents
Automatically controlled safe locking mechanism of industrial vehicle Download PDFInfo
- Publication number
- CN114001173A CN114001173A CN202111247430.XA CN202111247430A CN114001173A CN 114001173 A CN114001173 A CN 114001173A CN 202111247430 A CN202111247430 A CN 202111247430A CN 114001173 A CN114001173 A CN 114001173A
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- China
- Prior art keywords
- push rod
- valve core
- electromagnetic
- locking mechanism
- valve
- Prior art date
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/0759—Details of operating station, e.g. seats, levers, operator platforms, cabin suspension
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K35/00—Means to prevent accidental or unauthorised actuation
- F16K35/02—Means to prevent accidental or unauthorised actuation to be locked or disconnected by means of a pushing or pulling action
- F16K35/022—Means to prevent accidental or unauthorised actuation to be locked or disconnected by means of a pushing or pulling action the locking mechanism being actuated by a separate actuating element
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
- F16K37/0083—For recording or indicating the functioning of a valve in combination with test equipment by measuring valve parameters
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Magnetically Actuated Valves (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention discloses an industrial vehicle electric control safety locking mechanism which is used for being matched with an operation handle and comprises a valve body and a valve core, wherein one end of the valve core is arranged in the valve body in a sliding mode, an end cover matched with the other end of the valve core is fixedly arranged on the outer side of the valve body, a limiting groove is formed in the valve core, and an electromagnetic push rod matched with the limiting groove is arranged on the outer side of the end cover. The invention has the advantages that the control of the valve core can be completed through the extension and contraction of the electromagnetic push rod, so that the locking of the operating handle is realized, the locking device is matched with a seat for use, and different electromagnetic valve switches can be conveniently combined to realize the required functions; not only optimizes the original complex mechanism and reduces the failure rate, but also greatly reduces the design and manufacturing cost.
Description
Technical Field
The application relates to the technical field of electric control safety locks of forklifts, in particular to an electric control safety locking mechanism matched with a forklift seat for use.
Background
The manual multi-way valve controls each action executed by the multi-way valve through the control handle, and when the operation of workers is not standard, the operators touch the handle by mistake, and unnecessary actions are generated, accidents such as heavy object falling, out-of-control forklift and the like can be caused. At present, a mechanical structure is generally adopted in the market to lock a multi-way valve rod which does not need to be operated, and a locking mechanism is opened when the valve rod needs to be operated, for example, a lock pin device disclosed in a utility model patent with the patent number of CN2020203859658 in Chinese patent documents is disclosed.
According to the safety requirement of CE authentication, namely product safety authentication, the forklift multi-way valve needs to have a seat safety sensing function, namely an OPS function for short, namely when an operator leaves a driving position, a handle of the multi-way valve is operated, and the forklift gantry does not slide downwards. The multi-way valve with the OPS function is additionally provided with two combination valves, when an operator leaves a seat, electromagnetic valves of the two combination valves cannot be electrified, an oil port A1 is sealed, and when a lifting handle is operated, a gantry does not act. When an operator sits on the seat, the electromagnetic valve switch of the combined valve is touched, the electromagnetic valve is electrified, the control handle and the A1 oil port can feed oil or return oil, and the gantry can normally lift and descend.
The prior art has the following problems:
1. the mechanical locking mechanism has a complex structure and higher processing cost, the installation position of the mechanism is very low, an operator needs to bend down to operate when leaving a seat, and the operation is very inconvenient and the efficiency is low;
2. in order to realize the OPS function, the multi-way valve needs to integrate four small valves, so that the cost is high, the failure rate is high, and the maintenance is inconvenient.
Disclosure of Invention
Based on the defects in the prior art, the invention provides the electric control safety locking mechanism for the industrial vehicle, which does not need two combination valves to be matched with a multi-way valve, can be matched with automatic control of seat lifting, and has the advantages of lower cost and reliable operation.
In order to achieve the above object, the present invention adopts the following technical solutions.
The utility model provides an automatically controlled safe locking mechanism of industrial vehicle for cooperation operating handle, characterized by, including valve body and case, the one end of case slides and sets up in the valve body, and the fixed end cover that is equipped with the cooperation case other end in the valve body outside is equipped with spacing recess on the case, and the end cover outside is equipped with the electromagnetism push rod that is used for cooperating spacing recess.
The control of the valve core can be completed through the extension and contraction of the electromagnetic push rod, so that the locking of the operating handle is realized, and the electromagnetic push rod can be conveniently combined with different electromagnetic valve switches to realize the required functions in cooperation with a seat for use; not only optimizes the original complex mechanism and reduces the failure rate, but also greatly reduces the design and manufacturing cost.
Preferably, the valve core is provided with a mounting seat in the end cover, the mounting seat is provided with a limiting hole corresponding to the electromagnetic push rod, and the mounting seat is arranged in a sliding manner relative to the valve core; the outer side surface of the mounting seat is provided with a step surface, the mounting seat is provided with a positioning hole corresponding to the electromagnetic push rod, the lower end of the valve core is provided with a guide sleeve which is arranged in a sliding mode, and a compression spring is arranged between the guide sleeve and the mounting seat. The guide sleeve can form guiding limit on the lower end of the valve core, and the compression spring pushes the mounting seat and the guide sleeve out to two ends of the compression spring, so that a positioning hole in the mounting seat can keep a corresponding state with the electromagnetic push rod, and the reliability of the electromagnetic push rod is improved; the compression spring is also a reset piece of the valve core, and when the valve core is lifted, the limit position of the lowest end of the valve core can be limited through the compression spring, so that when the valve core is at the limit position under the normal state, the electromagnetic push rod can be reliably matched with the limit groove on the valve core.
Preferably, the lower end of the valve core is provided with an annular groove, and the guide sleeve and the mounting seat are respectively provided with an annular bulge matched with the annular groove. The annular groove is matched with the annular protrusion, so that the guide sleeve and the mounting seat can be arranged in a sliding mode relative to the annular groove, the two annular protrusions on the guide sleeve and the mounting seat can be used for positioning the lower end of the valve core in a guiding mode, and the stability of the sliding valve core is improved.
Preferably, the limiting groove is of an annular structure surrounding the radial section of the valve core, and the cross section of the limiting groove is rectangular. The annular limiting groove enables the limiting groove to be reliably matched with the electromagnetic push rod even if the valve core deflects in assembly precision.
Preferably, the control end of the electromagnetic push rod is arranged on the seat. The electromagnetic push rod is convenient to operate.
Preferably, the electromagnetic push rod is used in combination with a lifting seat, when the seat is lifted, the electromagnetic push rod is triggered to be pushed out, and the valve core cannot move; when the seat descends, the electromagnetic push rod is triggered to retract, and the valve core can move. Electromagnetic push rod and lift seat cooperation automatic working need not manual operation, avoids operating personnel to forget, and the personnel just can't carry out fork truck operation after standing up from fork truck, and the security is higher.
Preferably, the electromagnetic push rod comprises an electromagnetic valve and a push rod matched with the electromagnetic valve, and when the push rod is in the retracted extreme position, the outer end of the push rod is positioned in the limit hole. The push rod is always matched with the limiting hole, so that the sliding reliability of the push rod is ensured.
Preferably, the valve body is respectively provided with a sealing groove at the outer side of each of two ends corresponding to the valve core, a double-layer sealing ring is arranged in each sealing groove, each double-layer sealing ring comprises a first sealing ring and a second sealing ring which are sequentially arranged from the outside of the valve body to the inside of the valve body, the cross section of each first sealing ring is rectangular, and the cross section of each second sealing ring is rounded rectangular; the end face of the valve body is fixedly provided with a sealing cover which is matched with and compresses the double-layer sealing ring. The double-layer sealing ring forms reliable double-layer sealing, the fillet of the second sealing ring of the inner layer is arranged to facilitate installation of the second sealing ring, the double-layer sealing ring is tightly pressed in the sealing groove through the sealing cover, and the sealing effect is reliable.
Preferably, the push rod is cylindrical, a spiral groove is formed in the wall surface of the push rod, a limiting convex tooth matched with the spiral groove is arranged on the limiting hole, and a cylindrical arc surface is arranged at the outer end of the push rod; when the end face of the push rod extends out of the limiting hole, the cylindrical cambered surface at the outer end of the push rod is upwards convexly arranged, and the thread pitch of the spiral groove is matched with the hole depth of the positioning hole. The spacing dogtooth of helicla flute cooperation, after the push rod stretches out spacing hole, the interior concave part of cylindricality cambered surface corresponds at the upside, consequently, even some article have been put on compression spring surpassed fatigue limit or the seat and have caused the push rod to slightly misplace downwards, the push rod screw feed still can stretch into in locating hole and the spacing recess to can guarantee the reliability of push rod effect.
Preferably, a first limiting ring and a second limiting ring which are coaxial with the valve core are respectively arranged on two groove walls of the limiting groove; the end face of the push rod is provided with a pressure sensor, and a lead matched with the pressure sensor is arranged in the push rod. The pressure sensor forms feedback, and the magnetic force exerted on the push rod before and after the push rod extends is different, so that whether the push rod is matched in the positioning hole or not can be detected through the pressure sensor; first spacing ring and second spacing ring can cooperate the helicla flute, realize spacing to case radial movement, when the case rotated, can drive the push rod spiral and get into or the spiral is released, whether cooperation pressure sensor can feed back the case rotation volume, improve the security of operation.
The invention has the following beneficial effects: two combination valves are not needed to be matched with the multi-way valve, the lifting of the seat can be automatically controlled in a matched manner, the cost is low, and the operation is reliable; the reliability of the electromagnetic push rod is high.
Drawings
Fig. 1 is a schematic structural view of a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the embodiment shown in fig. 1 when the electromagnetic push rod is pushed out.
Fig. 3 is a schematic structural diagram of the electromagnetic push rod and the valve core in a second embodiment of the invention.
In the figure: a valve body 1, a valve core 2, an oil passage 3, a sealing groove 4, a first sealing ring 5, a second sealing ring 6, a sealing cover 7, an end cover 8, a limiting groove 9, an electromagnetic valve 10, a mounting seat 12, a limiting hole 13, a positioning hole 15, a guide sleeve 16, an annular groove 17, an annular bulge 18, a compression spring 19, a spiral groove 20, a limiting convex tooth 21, a cylindrical cambered surface 22, a first limiting ring 23, a second limiting ring 24 and a pressure sensor 25 are arranged on the pressure sensor.
Detailed Description
The invention is further illustrated with reference to the figures and the specific embodiments.
In the embodiment of the method, the first step,
as shown in fig. 1 to 2, an electric control safety locking mechanism for an industrial vehicle is used for being matched with an operating handle of a forklift, and comprises a valve body 1 and a valve core 2, wherein an oil passage 3 is arranged in the valve body 1. The valve body 1 is respectively provided with a sealing groove 4 at the outer side of the two ends corresponding to the valve core 2, a double-layer sealing ring is arranged in the sealing groove 4, the double-layer sealing ring comprises a first sealing ring 5 and a second sealing ring 6 which are sequentially arranged from the outside of the valve body 1 to the inside of the valve body 1, the cross section of the first sealing ring 5 is rectangular, and the cross section of the second sealing ring 6 is rounded rectangular; the end face of the valve body 1 is fixedly provided with a sealing cover 7 which is matched with and compresses the double-layer sealing ring. One end of the valve core 2 is arranged in the valve body 1 in a sliding mode, an end cover 8 matched with the other end of the valve core 2 is fixedly arranged on the outer side of the valve body 1, a limiting groove 9 is formed in the valve core 2, the limiting groove 9 is of an annular structure surrounding the radial section of the valve core 2, and the cross section of the limiting groove 9 is rectangular. An electromagnetic push rod used for being matched with the limiting groove 9 is arranged on the outer side of the end cover 8. The control end of the electromagnetic push rod is arranged on the seat. The electromagnetic push rod comprises an electromagnetic valve 10 and a push rod 11 matched with the electromagnetic valve 10, and a switch of the electromagnetic valve 10 is arranged beside the seat through a lead. Furthermore, the electromagnetic push rod is used in combination with a lifting seat, the switch of the electromagnetic valve 10 in the electromagnetic push rod is automatically controlled by the lifting of the seat, when the seat is lifted, the electromagnetic push rod is triggered to be pushed out, and as shown in fig. 2, the valve core 2 cannot move; when the seat descends, the electromagnetic push rod is triggered to retract, and as shown in fig. 1, the valve core 2 can move.
The valve core 2 is provided with a mounting seat 12 inside the end cover 8, the mounting seat 12 is provided with a limiting hole 13 corresponding to the electromagnetic push rod, when the push rod 11 is at the retraction limit position, the outer end of the push rod 11 is positioned in the limiting hole 13, and the mounting seat 12 is arranged in a sliding way relative to the valve core 2; the outer side surface of the mounting seat 12 is provided with a step surface 14, the mounting seat 12 is provided with a positioning hole 15 corresponding to the electromagnetic push rod, the lower end of the valve core 2 is provided with a guide sleeve 16 which is arranged in a sliding manner, the lower end of the valve core 2 is provided with an annular groove 17, and the guide sleeve 16 and the mounting seat 12 are respectively provided with an annular bulge 18 which is matched with the annular groove 17. A compression spring 19 is arranged between the guide sleeve 16 and the mounting seat 12. The guide sleeve 16 can form guiding limit on the lower end of the valve core 2, the compression spring 19 pushes the installation seat 12 and the guide sleeve 16 out to two ends of the compression spring 19, so that the positioning hole 15 on the installation seat 12 can keep a corresponding state with the electromagnetic push rod, and the reliability of the electromagnetic push rod is improved; the compression spring 19 is also a reset piece for the valve core 2, when the valve core 2 goes up and down, the limit position of the lowest end of the valve core 2 can be limited through the compression spring 19, and therefore when the valve core 2 is in the limit position under the normal state, the electromagnetic push rod can be reliably matched with the limit groove 9 on the valve core 2. The control of the valve core 2 can be completed through the extension and contraction of the electromagnetic push rod, so that the locking of the operating handle is realized, and the electromagnetic push rod can be conveniently combined with different electromagnetic valves 10 to realize the required functions by being matched with a seat for use; not only optimizes the original complex mechanism and reduces the failure rate, but also greatly reduces the design and manufacturing cost.
In the case of the example 2, the following examples are given,
an electric control safety locking mechanism of an industrial vehicle is shown in fig. 3, and the embodiment 2 is different from the embodiment 1 in that: the push rod 11 is cylindrical, the wall surface of the push rod 11 is provided with a spiral groove 20, and the spiral groove 20 is provided with four strips arranged in a circumferential array around the axis of the push rod 11. The limiting hole 13 is provided with a limiting convex tooth 21 matched with the spiral groove 20, and the outer end of the push rod 11 is provided with a cylindrical cambered surface 22; the maximum central angle of the cross section of the cylindrical arc surface 22 is 66 degrees, and the lower end of the cylindrical arc surface 22 is tangent with the end surface of the push rod 11. When the end face of the push rod 11 extends out of the limiting hole 13, the cylindrical cambered surface 22 at the outer end of the push rod 11 is arranged in a protruding mode, and the thread pitch of the spiral groove 20 is matched with the hole depth of the positioning hole 15. A first limiting ring 23 and a second limiting ring 24 which are coaxial with the valve core 2 are respectively arranged on two groove walls of the limiting groove 9, a pressure sensor 25 is arranged on the end face of the push rod 11, and the pressure sensor 25 and the cylindrical cambered surface 22 are respectively positioned at two opposite ends of the outer end face of the push rod 11. A lead wire is provided in the push rod 11 to engage the pressure sensor 25.
The spiral groove 20 is matched with the limit convex tooth 21, and after the push rod 11 extends out of the limit hole 13, the concave part of the cylindrical arc surface 22 corresponds to the upper side, so that even if the compression spring 19 exceeds the fatigue limit or some articles are placed on the seat to cause slight downward dislocation of the push rod 11, the push rod 11 can still extend into the positioning hole 15 and the limit groove 9 in a spiral feeding mode, and the reliability of the action of the push rod 11 can be ensured. The pressure sensor 25 forms feedback, and the magnetic force applied to the push rod 11 before and after the push rod 11 extends is different, so that whether the push rod 11 is matched into the positioning hole 15 can be detected through the pressure sensor 25; the first limiting ring 23 and the second limiting ring 24 can be matched with the spiral groove 20 to limit radial movement of the valve core 2, when the valve core 2 deflects and rotates, the push rod 11 can be driven to enter in a spiral mode or be pushed out in a spiral mode, whether the valve core 2 rotates or not can be fed back through the cooperation of the pressure sensor 25, and operation safety is improved.
Claims (8)
1. The utility model provides an automatically controlled safe locking mechanism of industrial vehicle for cooperation operating handle, characterized by, including valve body and case, the one end of case slides and sets up in the valve body, and the fixed end cover that is equipped with the cooperation case other end in the valve body outside is equipped with spacing recess on the case, and the end cover outside is equipped with the electromagnetism push rod that is used for cooperating spacing recess.
2. The electrically controlled safety locking mechanism for industrial vehicles according to claim 1, wherein the valve core is provided with a mounting seat inside the end cover, the mounting seat is provided with a limiting hole corresponding to the electromagnetic push rod, and the mounting seat is slidably arranged relative to the valve core; the outer side surface of the mounting seat is provided with a step surface, the mounting seat is provided with a positioning hole corresponding to the electromagnetic push rod, the lower end of the valve core is provided with a guide sleeve which is arranged in a sliding mode, and a compression spring is arranged between the guide sleeve and the mounting seat.
3. The electrically controlled safety locking mechanism for industrial vehicles as claimed in claim 2, wherein the lower end of the valve core is provided with an annular groove, and the guide sleeve and the mounting seat are respectively provided with an annular protrusion matching with the annular groove.
4. The electrically controlled safety locking mechanism for industrial vehicles as claimed in claim 1, wherein the limiting groove is an annular structure surrounding a radial section of the valve core, and the cross-sectional shape of the limiting groove is rectangular.
5. The industrial vehicle electric control safety locking mechanism as claimed in claim 1, wherein the electromagnetic push rod is used in combination with a lifting seat, when the seat is lifted, the electromagnetic push rod is triggered to push out, and the valve core cannot move; when the seat descends, the electromagnetic push rod is triggered to retract, and the valve core can move.
6. The electrically controlled safety locking mechanism for industrial vehicles as claimed in claim 1, 2 or 5, wherein the electromagnetic push rod comprises an electromagnetic valve and a push rod cooperating with the electromagnetic valve, and when the push rod is at the retracted extreme position, the outer end of the push rod is located in the limit hole.
7. The electrically controlled safety locking mechanism for industrial vehicles as claimed in claim 6, wherein the push rod is cylindrical, the wall of the push rod is provided with a spiral groove, the limiting hole is provided with a limiting convex tooth matching with the spiral groove, and the outer end of the push rod is provided with a cylindrical cambered surface; when the end face of the push rod extends out of the limiting hole, the cylindrical cambered surface at the outer end of the push rod is upwards convexly arranged, and the thread pitch of the spiral groove is matched with the hole depth of the positioning hole.
8. The electrically controlled safety locking mechanism for industrial vehicles as claimed in claim 7, wherein the two walls of the limiting groove are respectively provided with a first limiting ring and a second limiting ring which are coaxially arranged with the valve core; the end face of the push rod is provided with a pressure sensor, and a lead matched with the pressure sensor is arranged in the push rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111247430.XA CN114001173A (en) | 2021-10-26 | 2021-10-26 | Automatically controlled safe locking mechanism of industrial vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111247430.XA CN114001173A (en) | 2021-10-26 | 2021-10-26 | Automatically controlled safe locking mechanism of industrial vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114001173A true CN114001173A (en) | 2022-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111247430.XA Pending CN114001173A (en) | 2021-10-26 | 2021-10-26 | Automatically controlled safe locking mechanism of industrial vehicle |
Country Status (1)
| Country | Link |
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| CN (1) | CN114001173A (en) |
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| CN101769274A (en) * | 2010-01-14 | 2010-07-07 | 戴豫 | Electromagnetic self-locking protecting device for multi-way valve |
| CN204284523U (en) * | 2014-08-28 | 2015-04-22 | 比亚迪股份有限公司 | Control valve |
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| CN105715248A (en) * | 2016-04-11 | 2016-06-29 | 谭金山 | Safety drilling control device |
| US20170241566A1 (en) * | 2016-02-24 | 2017-08-24 | Toyota Jidosha Kabushiki Kaisha | Replacement necessity determination device for snap-in valve |
| CN213540970U (en) * | 2020-09-23 | 2021-06-25 | 北京金隅天坛家具股份有限公司 | Portable wooden board connection structure |
| CN216235887U (en) * | 2021-10-26 | 2022-04-08 | 杭叉集团股份有限公司 | Automatically controlled safe locking mechanism of industrial vehicle |
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2021
- 2021-10-26 CN CN202111247430.XA patent/CN114001173A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003148430A (en) * | 2001-11-15 | 2003-05-21 | Nifco Inc | Plate material connecting clip |
| US20050144887A1 (en) * | 2003-12-23 | 2005-07-07 | Spirol International Corporation | Helical grooved pin |
| CN1740577A (en) * | 2004-08-23 | 2006-03-01 | 希尔蒂股份公司 | Fastening element |
| US20060137752A1 (en) * | 2004-12-28 | 2006-06-29 | Paolo Rusconi | Control device for controlling the movements in a multi-way valve for driving a cylinder-piston assembly |
| CN201129495Y (en) * | 2007-12-18 | 2008-10-08 | 卫靖江 | Lock control type ball valve |
| CN101769274A (en) * | 2010-01-14 | 2010-07-07 | 戴豫 | Electromagnetic self-locking protecting device for multi-way valve |
| CN204284523U (en) * | 2014-08-28 | 2015-04-22 | 比亚迪股份有限公司 | Control valve |
| CN105692508A (en) * | 2015-11-02 | 2016-06-22 | 林德（中国）叉车有限公司 | Multi-way valve control handle connection device and multi-way valve control mechanism |
| US20170241566A1 (en) * | 2016-02-24 | 2017-08-24 | Toyota Jidosha Kabushiki Kaisha | Replacement necessity determination device for snap-in valve |
| CN105715248A (en) * | 2016-04-11 | 2016-06-29 | 谭金山 | Safety drilling control device |
| CN213540970U (en) * | 2020-09-23 | 2021-06-25 | 北京金隅天坛家具股份有限公司 | Portable wooden board connection structure |
| CN216235887U (en) * | 2021-10-26 | 2022-04-08 | 杭叉集团股份有限公司 | Automatically controlled safe locking mechanism of industrial vehicle |
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