CN203079620U - Brake control device and crane - Google Patents

Brake control device and crane Download PDF

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Publication number
CN203079620U
CN203079620U CN 201220735554 CN201220735554U CN203079620U CN 203079620 U CN203079620 U CN 203079620U CN 201220735554 CN201220735554 CN 201220735554 CN 201220735554 U CN201220735554 U CN 201220735554U CN 203079620 U CN203079620 U CN 203079620U
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CN
China
Prior art keywords
oil
brake cylinder
return opening
brake
braking
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.)
Withdrawn - After Issue
Application number
CN 201220735554
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Chinese (zh)
Inventor
单增海
胡小冬
靳亮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xuzhou Heavy Machinery Co Ltd
Original Assignee
Xuzhou Heavy Machinery Co Ltd
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Filing date
Publication date
Application filed by Xuzhou Heavy Machinery Co Ltd filed Critical Xuzhou Heavy Machinery Co Ltd
Priority to CN 201220735554 priority Critical patent/CN203079620U/en
Application granted granted Critical
Publication of CN203079620U publication Critical patent/CN203079620U/en
Withdrawn - After Issue legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a brake control device and a crane, and relates to the engineering machinery technical field. The brake control device and the crane solve the technical problem existing in the prior art that a brake containing cavity of a brake oil cylinder is too large in oil return back pressure. The brake control device comprises a brake oil cylinder, a control valve and bypass oil ways, wherein an oil return opening of the brake containing cavity of the brake oil cylinder is connected with an oil cylinder through the control valve, when the control valve is in a first state, oil ways between the oil return opening of the brake containing cavity of the brake oil cylinder and the oil cylinder are communicated through the control valve; when the control valve is in a second state, the oil ways between the oil return opening of the brake containing cavity of the brake oil cylinder and the oil cylinder are closed; the bypass oil ways are connected between the oil return opening of the brake containing cavity of the brake oil cylinder and the oil cylinder in parallel, and hydraulic oil flowing out from the oil return opening of the brake containing cavity of the brake containing cavity can flow into the oil cylinder through the bypass oil ways. The crane comprises the brake control device. The brake control device and the crane are used for reducing the oil return back pressure of the brake containing cavity of the braking oil cylinder.

Description

Braking force control system and hoisting crane
Technical field
The utility model relates to technical field of engineering machinery, the hoisting crane that is specifically related to a kind of braking force control system and this braking force control system is set.
Background technology
Domestic and international hoisting crane production firm is common equal first-selected Closed Hydraulic control system when hoister in large tonnage elevator design of Hydraulic System, and the Closed Hydraulic control system also can abbreviate closed system as.Large-tonnage elevator closed fhdraulic system is made up of bidirectional hydraulic pump, two-way hydraulic motor etc. usually, and other establishes slippage pump is system's fuel feeding, and is the unlatching fuel feeding of drg.
The oil inlet of Hydraulic Pump directly links to each other with the oil return pipe of power element (for example two-way hydraulic motor) in the Closed Hydraulic control system, and hydraulic oil (or claims: power fluid) carry out close cycle in the pipeline of system.The major advantage of Closed Hydraulic control system is the system effectiveness height, and cal val is little, compact conformation etc.
Increasingly mature along with the hoister in large tonnage product, more and more higher in-use performance and safety performance have been subjected to people's attention, and wherein: the hoister in large tonnage elevator falls braking incessantly, and the hook phenomenon of slipping has become the difficult problem that technical personnel need be captured.
At present, the braking scheme that generally adopts in the industry is to adopt the braking force control system 7 of the two-position three way solenoid directional control valve of band check valve as shown in Figure 1 to brake oil inlet and oil return control.Slip the problem of hook easily in order to solve the elevator brake system, mainly be now by the electrical control logic go to change drg control solenoid directional control valve and controllable capacity pump 50 the control solenoid directional control valve dead electricity in sequence, promptly by control logic drg is braked in advance with this and eliminated slide hook phenomenon, specific implementation is as follows:
When handle will return meta, in controller, store a controlling quantity in advance, when handle is repositioned to this controlling quantity, controller just thinks that the operator need stop the elevator operation, will send the control current of closing drg, be that solenoid directional control valve will dead electricity, at this moment, the hydraulic oil in the control cavity volume of brake cylinder 1 flows into fuel tank 4 by the return opening on the brake cylinder 1 through solenoid directional control valve.When handle was finished back meta, controller just sent the solenoid directional control valve that control signal is closed controllable capacity pump 50, made controllable capacity pump 50 stop pump oil, and then made the hoist motor 60 that hoists stop action.
In the prior art, brake in advance to reach and reduce to slip the method for hook, just must send the closing control signal to drg in advance, make that when handle was not finished back meta, drg was just braked by changing drg control cock logic realization.In practical operation, this braking scheme solves effect and bad, reason mainly contain following some:
1., owing to drg just braking in advance when handle does not return meta fully, so the feasible fine motion decline of hoist motor 60 when the crack mouth of handle that hoists as shown in Figure 1;
2., if control logic is provided with improperly, drg then can occur and brake, and oil pump will make brake bush be in the dry grinding state also in the phenomenon that continues pump oil like this, has reduced the service life of drg brake plate;
3., because empty hook and when hanging underloading, the power difference that affacts on the whole Closed Hydraulic control system is not many, so system is difficult to distinguish empty hook and hangs the difference of carrying operating mode.
There is following technical matters at least in prior art:
According to the analysis of technical personnel, the reason of above-mentioned many adverse consequencess is: the defective on the control logic, it is unreasonable to also have big and this valve latus rectum of drain tap back pressure factor such as to choose.These reasons finally cause the regular appearance of drg oil return to postpone (when particularly winter, hydraulic oil viscosity increased), and finally cause slide hook phenomenon.
The utility model content
The purpose of this utility model is the hoisting crane that proposes a kind of braking force control system and this braking force control system is set, and solved the too big technical matters of braking cavity volume return oil pressure that there is brake cylinder in prior art.In addition, of the present utility model optionally or optimized technical scheme also have hoisting crane and be not prone at glancing impact that to slip hook, brake cylinder opening procedure more steady, and advantage simple in structure, with low cost.
For achieving the above object, the utility model provides following technical scheme:
The braking force control system that the utility model embodiment provides comprises brake cylinder, control cock and bleed off circuit, wherein:
Link to each other by described control cock between return opening on the braking cavity volume of described brake cylinder and the fuel tank, return opening when described control cock is in first state on the braking cavity volume of described brake cylinder is connected by described control cock with oil circuit between the described fuel tank, and return opening when described control cock is in second state on the braking cavity volume of described brake cylinder and the oil circuit between the described fuel tank end;
Described bleed off circuit is parallel between the return opening and described fuel tank on the braking cavity volume of described brake cylinder, and the hydraulic oil that flows out of the return opening from the braking cavity volume of described brake cylinder can pass through described bleed off circuit and flow into described fuel tank.
In an optional or preferred embodiment, the resistance that the resistance that described bleed off circuit applies the hydraulic oil of flowing through applies the hydraulic oil of flowing through greater than described control cock, described bleed off circuit comprises at least one damping element, wherein:
Described damping element is provided with damping hole, and the return opening on the braking cavity volume of described brake cylinder is connected with described fuel tank by described damping hole.
In an optional or preferred embodiment, described bleed off circuit comprises at least two described damping elements, the mutual serial or parallel connection of the damping hole on the described damping element.
In an optional or preferred embodiment, described damping element is the outside thread damping plug.
In an optional or preferred embodiment, described bleed off circuit comprises at least one filter, and the return opening on the braking cavity volume of described brake cylinder is connected with described damping hole by described filter.
In an optional or preferred embodiment, described control cock is the two-position three way solenoid directional control valve.
In an optional or preferred embodiment, be connected by check valve between the return opening of described two-position three way solenoid directional control valve and the described fuel tank, described check valve is along the direction conducting from the return opening of described two-position three way solenoid directional control valve to described fuel tank.
In an optional or preferred embodiment, described two-position three way solenoid directional control valve is band zero leakage ball leak free two-position three way solenoid directional control valve.
The hoisting crane that the utility model embodiment provides comprises the braking force control system that bidirectional hydraulic pump, two-way hydraulic motor and the arbitrary technical scheme of the utility model embodiment provide, wherein:
Two actuator ports of described two-way hydraulic motor are connected with two actuator ports of described bidirectional hydraulic pump respectively, and described bidirectional hydraulic pump provides power in the mode of supply hydraulic fluid for described two-way hydraulic motor; The braking cavity volume of described brake cylinder is the rod chamber of described brake cylinder.
In an optional or preferred embodiment, described two-way hydraulic motor is the hoist motor that hoists.
Based on technique scheme, the utility model embodiment can produce following technique effect at least:
Owing to be parallel with bleed off circuit between return opening on the braking cavity volume of the brake cylinder in the braking force control system that the utility model embodiment provides and the fuel tank, and the hydraulic oil that the return opening from the braking cavity volume of brake cylinder flows out can flow into fuel tank through bleed off circuit, therefore, the braking cavity volume oil return of brake cylinder is to realize glancing impact, the hydraulic oil control cock that is in first state of not only can flowing through finally flows into fuel tank, but also the bleed off circuit of can flowing through finally flows into fuel tank, bleed off circuit can be shunted the hydraulic oil that flows out from the braking cavity volume return opening of brake cylinder by actv. owing to flow through, and then effectively reduced the braking cavity volume return oil pressure of brake cylinder, so solved the too big technical matters of braking cavity volume return oil pressure that there is brake cylinder in prior art.
When the braking force control system that provides as the utility model embodiment is applied on the hoisting crane, because the braking cavity volume return oil pressure of brake cylinder is less,, avoided the generation of slide hook phenomenon thus so but the piston rod at high speed of the brake cylinder of braking force control system is realized the braking to the hoist motor that hoists.
Optimal technical scheme of the present utility model compared with prior art can also produce following advantage at least:
1, because bleed off circuit (or claim: the existence bypass damping circuit), increased the drg drainback passage, accelerated oil return speed, reduced the braking time of drg;
2, the two-position three way solenoid directional control valve stimulates the menstrual flow and selectes according to the oil return flow, the loss of pressure when reducing to brake the cavity volume oil return, and then reduce return oil pressure;
3, increase drg and open stationarity, promote the system performance that hoists, bleed off circuit can effectively eliminate the pressure crest of system, reduces to brake the compression shock of cavity volume, and it is more steady that drg is opened, and promotes the system operation performance that hoists.
4, it is less that bleed off circuit uses element, has advantage simple in structure, with low cost.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, and illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model.In the accompanying drawings:
Fig. 1 is the scheme drawing of annexation between the chief component in the Closed Hydraulic control system that braking force control system is set in the prior art;
The scheme drawing of annexation between the braking force control system internal by-pas oil circuit that Fig. 2 is provided for the utility model embodiment and control cock, brake cylinder and the bidirectional hydraulic pump;
Fig. 3 is the enlarged diagram of C part shown in Figure 2;
The scheme drawing of the part hydraulic circuit in the hoisting crane of the braking force control system that the utility model embodiment is set is provided is provided Fig. 4;
Mark among the figure: 1, brake cylinder; 11, piston rod; 2, control cock; 3, bleed off circuit; 31, damping element; 32, filter; 4, fuel tank; 5, bidirectional hydraulic pump; 50, controllable capacity pump; 6, two-way hydraulic motor; 60, the hoist motor that hoists; 7, braking force control system; 8, check valve.
The specific embodiment
Below by accompanying drawing Fig. 2~Fig. 4 and the mode of enumerating optional embodiment more of the present utility model, the technical solution of the utility model (comprising optimal technical scheme) is described in further detail.Need to prove: any technical characterictic in the present embodiment (can use comma between the technical characterictic; fullstop; punctuation mark such as pause mark or branch etc. arbitrarily separate); any technical scheme all is the technical characterictic of plurality of optional or optional one or more in the technical scheme; can't exhaustive all alternative technical characterictics of the present utility model and alternative technical scheme in order to describe succinct need in the presents; the embodiment that also is not easy to each technical characterictic emphasizes that all it is one of optional numerous embodiments; so those skilled in the art should know: any technical characterictic and any technical scheme in the present embodiment all do not limit protection domain of the present utility model, and protection domain of the present utility model should comprise that those skilled in the art do not pay the thinkable any alternate embodiments of creative work.
The utility model embodiment provides that a kind of braking cavity volume return oil pressure of brake cylinder is smaller, the brake cylinder opening procedure is more steady, and braking force control system simple in structure, with low cost and hoisting crane that this braking force control system is set.
Below in conjunction with Fig. 2~Fig. 4 the technical scheme that the utility model provides is carried out more detailed elaboration, the technical scheme that arbitrary technological means that the utility model is provided is replaced or two or more technological means that the utility model provides are made up mutually and obtains all should be within protection domain of the present utility model.
As Fig. 2~shown in Figure 4, the braking force control system that the utility model embodiment is provided comprise brake cylinder (or claim: drg) 1, control cock (this control cock can be electromagnetic valve, is preferably the two-position three way solenoid directional control valve) 2 and bleed off circuit 3, wherein:
Link to each other by control cock 2 between return opening on the braking cavity volume of brake cylinder 1 and the fuel tank 4, control cock 2 is in first state, and (for example: the return opening in the time of the electromagnetic valve dead electricity) on the brake cylinder 1 braking cavity volume is communicated with by control cock 2 with the oil circuit between the fuel tank 4.
Return opening when control cock 2 is in second state (for example: electromagnetic valve gets) on the braking cavity volume of brake cylinder 1 and the oil circuit between the fuel tank 4 end.With it this moment, the return opening on the braking cavity volume of brake cylinder 1 can also be connected with the pipeline that is braking cavity volume input hydraulic pressure oil.
Bleed off circuit 3 is parallel between return opening and the fuel tank 4 on the brake cylinder 1 braking cavity volume, and the hydraulic oil that the return opening from brake cylinder 1 braking cavity volume flows out can the described bleed off circuit 3 inflow fuel tanks 4 of process.
Owing to be parallel with bleed off circuit 3 between return opening on the braking cavity volume of the brake cylinder 1 in the braking force control system that the utility model embodiment provides and the fuel tank 4, the hydraulic oil that return opening from brake cylinder 1 braking cavity volume flows out can flow into fuel tank 4 through bleed off circuit 3, therefore, brake cylinder 1 braking cavity volume oil return is to realize glancing impact, the hydraulic oil final fuel tanks 4 that flow into of control cock 2 of not only can flowing through, but also the bleed off circuit 3 final fuel tanks 4 that flow into of can flowing through, bleed off circuit 3 can the actv. shunting be braked the hydraulic oil that the cavity volume return opening flows out from brake cylinder 1 owing to flow through, and then has effectively reduced the return oil pressure of the braking cavity volume of brake cylinder 1.
As a kind of optional or preferred embodiment, the resistance that the resistance that 3 pairs of hydraulic oil of flowing through of bleed off circuit apply in the present embodiment applies greater than 2 pairs of hydraulic oil of flowing through of control cock.This structure can guarantee that control cock 2 has under the prerequisite of the effect of oil circuit break-make between return opening and the fuel tank 4 on the control brake oil cylinder 1 braking cavity volume, effectively reduces the return oil pressure that brake cylinder 1 is braked cavity volume.
As a kind of optional or preferred embodiment, bleed off circuit 3 comprises at least one damping element 31 in the present embodiment, damping element 31 is preferably the outside thread damping plug.Wherein: damping element 31 is provided with damping hole, and the return opening on the brake cylinder 1 braking cavity volume is connected with fuel tank 4 by damping hole.
Damping hole can increase the resistance that 3 pairs of hydraulic oil of flowing through of bleed off circuit apply.Damping plug can be lifted down, if in a plurality of damping hole, certain damping hole of packing into is off size suitable, can adjust other damping hole sizes, also the off size suitable damping plug of damping hole can be lifted down and adjust, and reinstalls after adjusting.
Certainly, use other elements with the technical scheme that substitutes damping element 31 also within protection domain of the present utility model.
As a kind of optional or preferred embodiment, bleed off circuit 3 comprises at least two damping elements 31 in the present embodiment, the mutual serial or parallel connection of the damping hole on the damping element 31 is preferably mutual series connection.
Certainly, the technical scheme of a damping hole only is set also within protection domain of the present utility model.
As a kind of optional or preferred embodiment, bleed off circuit 3 comprises at least one filter 32 in the present embodiment, the return opening on the brake cylinder 1 braking cavity volume is connected with damping hole by filter 32.Filter 32 is used to filter hydraulic oil, avoids solid dregs in the hydraulic oil that damping hole is resulted in blockage or damages.
As a kind of optional or preferred embodiment, control cock 2 is preferably the two-position three way solenoid directional control valve in the present embodiment.This two-position three way solenoid directional control valve has is convenient to the advantage that connects, control.
As a kind of optional or preferred embodiment, be connected by check valve 8 between the return opening of two-position three way solenoid directional control valve and the fuel tank 4 in the present embodiment, check valve 8 is along the direction conducting from the return opening of two-position three way solenoid directional control valve to fuel tank 4.Check valve 8 can be avoided the in-oil cylinder hydraulic oil of return opening suck-back on the brake cylinder 1 braking cavity volume, thereby guarantees that brake cylinder 1 is able to reliable braking.
As a kind of optional or preferred embodiment, the two-position three way solenoid directional control valve is preferably band zero leakage ball leak free two-position three way solenoid directional control valve in the present embodiment.This valve has the advantage of good seal performance.
As Fig. 2~shown in Figure 4, the hoisting crane that the utility model embodiment provides comprises the braking force control system that bidirectional hydraulic pump 5, two-way hydraulic motor 6 and the arbitrary technical scheme of the utility model embodiment provide, wherein:
Two-way hydraulic motor 6 is preferably the hoist motor that hoists.Two actuator ports (comprising oil inlet, oil outlet) of two-way hydraulic motor 6 are connected with two actuator ports (comprising oil inlet, oil outlet) of bidirectional hydraulic pump 5 respectively, and A, B represent two actuator ports of bidirectional hydraulic pump 5 respectively among Fig. 4.Bidirectional hydraulic pump 5 is that two-way hydraulic motor 6 provides power in the mode of supply hydraulic fluid.
The braking cavity volume of brake cylinder 1 be preferably brake cylinder 1 rod chamber.When stretching out, can realize in the piston rod of brake cylinder 1 braking to the reductor of two-way hydraulic motor 6 drivings.
Certainly, the braking force control system that the arbitrary technical scheme of the utility model embodiment is provided is applied to brake technical scheme on the reductor that other motor or motors drove outside the hoist motor also within protection domain of the present utility model.
Above-mentioned arbitrary technical scheme disclosed in the utility model unless otherwise stated outside, if it discloses number range, so disclosed number range is preferred number range, any it should be appreciated by those skilled in the art: preferred number range only is the apparent in view or representative numerical value of technique effect in many enforceable numerical value.Because numerical value is more, can't be exhaustive, so the utility model just discloses part numerical value with the casehistory the technical solution of the utility model, and the above-mentioned numerical value of enumerating should not constitute the restriction of the utility model being created protection domain.
Simultaneously, if above-mentioned the utility model is open or related to bonded assembly parts fastened to each other or framing member, so, unless otherwise stated, captive joint can be understood as: can dismantle ground captive joint (for example using bolt or screw to connect), also can be understood as: non-removable captive joint (for example rivet, weld), certainly, connection fastened to each other also can be replaced (obviously can't adopt except the integrally formed technology) by integral structure (for example use casting, forging or Shooting Technique are integrally formed to create).
In addition, if there is the term be used to represent position relation or shape in the disclosed arbitrary technical scheme of above-mentioned the utility model, so appliedly be used to represent that outer unless otherwise stated its implication of term of position relation or shape comprises and its approximate, similar or approaching state or shape.Arbitrary parts that the utility model provides both can be to be assembled by a plurality of independent component parts, the produced separate part of the technology that also can be one of the forming.
Should be noted that at last: above embodiment only is not intended to limit in order to the explanation the technical solution of the utility model; Although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present utility model; And not breaking away from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.

Claims (10)

1. a braking force control system is characterized in that, comprises brake cylinder, control cock and bleed off circuit, wherein:
Link to each other by described control cock between return opening on the braking cavity volume of described brake cylinder and the fuel tank, return opening when described control cock is in first state on the braking cavity volume of described brake cylinder is connected by described control cock with oil circuit between the described fuel tank, and return opening when described control cock is in second state on the braking cavity volume of described brake cylinder and the oil circuit between the described fuel tank end;
Described bleed off circuit is parallel between the return opening and described fuel tank on the braking cavity volume of described brake cylinder, and the hydraulic oil that flows out of the return opening from the braking cavity volume of described brake cylinder can pass through described bleed off circuit and flow into described fuel tank.
2. braking force control system according to claim 1 is characterized in that, the resistance that the resistance that described bleed off circuit applies the hydraulic oil of flowing through applies the hydraulic oil of flowing through greater than described control cock, and described bleed off circuit comprises at least one damping element, wherein:
Described damping element is provided with damping hole, and the return opening on the braking cavity volume of described brake cylinder is connected with described fuel tank by described damping hole.
3. braking force control system according to claim 2 is characterized in that, described bleed off circuit comprises at least two described damping elements, the mutual serial or parallel connection of the damping hole on the described damping element.
4. braking force control system according to claim 2 is characterized in that, described damping element is the outside thread damping plug.
5. braking force control system according to claim 2 is characterized in that described bleed off circuit comprises at least one filter, and the return opening on the braking cavity volume of described brake cylinder is connected with described damping hole by described filter.
6. braking force control system according to claim 1 is characterized in that, described control cock is the two-position three way solenoid directional control valve.
7. braking force control system according to claim 6, it is characterized in that, be connected by check valve between the return opening of described two-position three way solenoid directional control valve and the described fuel tank, described check valve is along the direction conducting from the return opening of described two-position three way solenoid directional control valve to described fuel tank.
8. braking force control system according to claim 6 is characterized in that, described two-position three way solenoid directional control valve is band zero leakage ball leak free two-position three way solenoid directional control valve.
9. a hoisting crane is characterized in that, comprises the arbitrary described braking force control system of bidirectional hydraulic pump, two-way hydraulic motor and claim 1-8, wherein:
Two actuator ports of described two-way hydraulic motor are connected with two actuator ports of described bidirectional hydraulic pump respectively, and described bidirectional hydraulic pump provides power in the mode of supply hydraulic fluid for described two-way hydraulic motor;
The braking cavity volume of described brake cylinder is the rod chamber of described brake cylinder.
10. hoisting crane according to claim 9 is characterized in that described two-way hydraulic motor is the hoist motor that hoists.
CN 201220735554 2012-12-28 2012-12-28 Brake control device and crane Withdrawn - After Issue CN203079620U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220735554 CN203079620U (en) 2012-12-28 2012-12-28 Brake control device and crane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220735554 CN203079620U (en) 2012-12-28 2012-12-28 Brake control device and crane

Publications (1)

Publication Number Publication Date
CN203079620U true CN203079620U (en) 2013-07-24

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Family Applications (1)

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CN 201220735554 Withdrawn - After Issue CN203079620U (en) 2012-12-28 2012-12-28 Brake control device and crane

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103030081A (en) * 2012-12-28 2013-04-10 徐州重型机械有限公司 Brake control device and crane

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103030081A (en) * 2012-12-28 2013-04-10 徐州重型机械有限公司 Brake control device and crane
CN103030081B (en) * 2012-12-28 2015-04-22 徐州重型机械有限公司 Brake control device and crane

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