CN209267354U - The electric cylinder of external cooling cycle structure - Google Patents

Abstract

The utility model provides a kind of electric cylinder of external cooling cycle structure, comprising: electric cylinder ontology and cooling cycle structure, the outside of the electric cylinder ontology is arranged in the cooling outer circulation structure, the cooling outer circulation structure includes filter, heat exchanger, fuel tank, oil pump and delivery pipe, after the pump start, lubricating oil in the fuel tank is delivered to electric cylinder ontology input port by delivery pipe, lubricating oil exports out by the intrinsic cavity of electric cylinder from electric cylinder bulk circulation, it is transferred to electric cylinder bulk circulation entrance again by delivery pipe, by the cavity of electric cylinder body interior running gear, finally flowed out from the delivery outlet of electric cylinder ontology, then pass through heat exchanger again by the filter and flow back into the fuel tank.While effectively reducing parts running temperature using external efficient heat exchanger, impurity inside electric cylinder is discharged by the export of lubricating oil, it imports again after filtration, guarantee the operation good lubricant effect of parts, the abrasion of electric cylinder operation parts can be effectively reduced, the ability for improving antifatigue destruction improves electric cylinder reliability of operation, stability and service life.

Description

The electric cylinder of external cooling cycle structure

Technical field

The utility model belongs to electromechanical power transmission machinery field, and in particular to a kind of external cooling cycle structure Electric cylinder.

Background technique

Electric cylinder be it is a kind of the rotary motion of servo motor is changed into piston rod linear reciprocating motion, drive electric cylinder silk The flexible equipment for generating push-and-pull strength of bar.The kinematic accuracy of electric cylinder is high, response is fast, rigidity is good, has substituted in many fields Servo hydraulic cylinder.Traditional electric cylinder it is cooling using, by external cooling water by pipeline introducing electric cylinder body, thus Have the function that reduce electric cylinder operating mechanism temperature.This mode is in long-play because pipeline sealing is asked Topic, cooling water can be permeated and is mixed into lubricating oil, so that lubricating oil reduces or loses the lubricant effect of operating mechanism, in turn The probability for increasing abrasion, reduces actual life；Meanwhile the infiltration of cooling water will lead to the appearance electric leakage of electric cylinder cylinder body and do It disturbs, forms current overload alarm, occur shutting down phenomenon.

Utility model content

In view of this, it is necessory to provide a kind of electric cylinder reliable, stable and with long service life.

A kind of electric cylinder of external cooling cycle structure comprising: electric cylinder ontology and cooling cycle structure, the cooling The outside of the electric cylinder ontology is arranged in outer circulation structure, which includes filter, heat exchanger, oil Case, oil pump and delivery pipe, after the pump start, the lubricating oil in the fuel tank is delivered to electric cylinder sheet by delivery pipe Body input port, lubricating oil export out, be turned again by delivery pipe by the intrinsic cavity of electric cylinder from electric cylinder bulk circulation Enter electric cylinder bulk circulation entrance, by the cavity of electric cylinder body interior running gear, finally from the output of electric cylinder ontology Mouth outflow, then passes through heat exchanger by the filter again and flows back into the fuel tank.

The electric cylinder of the external cooling cycle structure further comprise the first temperatuer detector, second temperature detection meter, First check-valve and second check-valve, first temperatuer detector and first check-valve setting are defeated in the electric cylinder ontology Inlet, the other end of the first check-valve are connect with the heat exchanger；The second temperature detection meter and the second non-return Valve is arranged in the electric cylinder ontology equipped at outlet port, and the other end of the second check-valve is connect with the fuel tank.

The electric cylinder of the external cooling cycle structure further comprise electric cylinder cylinder body, motor, screw rod subcomponent and Dual thrust parts of bearings, the motor are mounted on the inside of the electric cylinder cylinder body, including stator and rotor；The screw pair group Part includes lead screw and the lead screw pair nut that lead screw is arranged in, which is fixed on the rotor, the lead screw pair spiral shell Female outer peripheral surface has a flange；The dual thrust parts of bearings includes two secondary self-aligning thrust roller bearings and rear bearing block, is somebody's turn to do Rear bearing block inner hole has a bulge loop, and lead screw pair nut flange rear end is arranged in described two secondary self-aligning thrust roller bearings back-to-back Outer peripheral surface, and separated among the two secondary self-aligning thrust roller bearing by the rear bearing block bulge loop and locked by circle locking nut Tightly, the rear bearing block is fixed on the electric cylinder cylinder body.

The dual thrust parts of bearings further comprises bearing adjustment gasket, which adjusts gasket and be arranged in the lead screw Between secondary nut flange and two secondary self-aligning thrust roller bearings.

Lead screw pair nut inner hole front has driving function part, and inner hole rear portion has guide function part, described Driving function part, guide function part and the flange of lead screw pair nut are integral structures.

The electric cylinder of the external cooling cycle structure further comprises rear guiding parts and preceding guiding parts, the rear guiding Component includes rear guide pad, which is arranged in the guide function part of the lead screw pair nut inner hole and is located at the silk The end of thick stick；The preceding guiding parts includes preceding guide sleeve support ring, preceding guide sleeve, preceding guide sleeve support base, it is described it is leading to Set support ring is arranged in the inner hole groove of the preceding guide sleeve and contacts with the lead screw, and the preceding guide sleeve is sleeved on described Lead screw, the preceding guide sleeve support base are fixed on the electric cylinder cylinder body.

The electric cylinder of the external cooling cycle structure, is tightly connected module after further comprising, the rear sealed connection mould Block includes rear flow guiding disc and rear attachment base, and the rear flow guiding disc and rear attachment base are fixed on the rear bearing block.

The electric cylinder of the external cooling cycle structure further comprises fore bearing component, which includes zanjon Ball bearing, front-end bearing pedestal and fore bearing support base, the fore bearing support base are sleeved on the lead screw, and the front-end bearing pedestal is solid It is scheduled on the front end of the electric cylinder cylinder body.

The electric cylinder of the external cooling cycle structure, seal modules device, the preceding sealed mould are packaged before further comprising It sets including dust-proof seal ring, seal cover board, O-ring seal, the seal cover board is set in the lead screw, and the seal cover board is solid Be scheduled on the preceding guiding parts, the dust-proof seal ring be located in the inner hole groove of the seal cover board and at runtime with it is described Lead screw contact, the O-ring seal be located at the seal cover board inner hole groove it is interior and with it is described leading to component contact.

The lead screw has preceding connection disputer, and the electric cylinder further comprises preceding attachment base, which has one Boss, the boss have a linking matching hole, at least one mating surface of the outer peripheral surface of the preceding connection disputer is plane, institute The plane of connection disputer cooperates with the matching hole that is connected of the preceding attachment base boss before stating.

The electric cylinder of external cooling cycle structure provided by the utility model is being utilized using external cooling cycle structure While external efficient heat exchanger effectively reduces parts running temperature, by the leading by lubricating oil of impurity inside electric cylinder It is discharged, imports again after filtration out, guarantee the operation good lubricant effect of parts, electric cylinder operation parts can be effectively reduced Abrasion, improves the ability of antifatigue destruction, improves electric cylinder reliability of operation, stability and service life.

Detailed description of the invention

Fig. 1 is the sectional view of electric cylinder provided by the embodiment of the utility model.

Fig. 2 is the partial enlarged view at the III of Fig. 1.

Fig. 3 is the K direction view of Fig. 2.

Enlarged partial sectional view at the I of Fig. 4 Fig. 1.

Fig. 5 is the enlarged partial sectional view at the II of Fig. 1.

Fig. 6 is Fig. 5 overhead, partial cut-away view.

Fig. 7 is the sectional view of another kind structure at the II of Fig. 1.

Fig. 8 is the structural schematic diagram of the electric cylinder of external cooling cycle structure.

Main element symbol description

Electric cylinder 10

Electric cylinder cylinder body 1

Motor 2

Screw rod subcomponent 3

Dual thrust parts of bearings 4

Guiding parts 5 afterwards

Fore bearing component 6

Preceding guiding parts 7

Seal modules device 8 before detachable

It is tightly connected module 9 afterwards

Cooling outer circulation structure 11

Input port 12

Delivery outlet 13

Loop exit 14

Preceding attachment base 15

Loop head 16

Rotor 21

Stator 22

Lead screw 31

Lead screw pair nut 32

Preceding connection disputer 33

Bearing adjusts gasket 41

Self-aligning thrust roller bearing 42,42 '

Rear bearing block 43

Circle locking nut 44

Support ring 51

Guide pad 52 afterwards

Deep groove ball bearing 61

Front-end bearing pedestal 62

Fore bearing support base 63

Preceding guide sleeve support ring 71

Preceding guide sleeve 72

Preceding guide sleeve support base 73

Dust-proof seal ring 81

Seal cover board 82

O-ring seal 84

Flow guiding disc 91 afterwards

Attachment base 93 afterwards

Magnetic-type filter 111

Heat exchanger 112

Fuel tank 113

Oil pump 114

First temperatuer detector 115

Second temperature detection meter 116

First check-valve 117

Second check-valve 118

Connection screw thread 156,157

Fastening bolt 83,92,158,162

Pin axis 101,161

To enable above and other objects, features and advantages of the utility model to be clearer and more comprehensible, the utility model will be tied It closes attached drawing and makes further description.

Specific embodiment

Referring to Fig. 1, present embodiments providing a kind of high thrust, antifatigue electric cylinder 10, electric cylinder 10 includes electric cylinder Cylinder body 1 is mounted on the intracorporal motor 2 of cylinder, screw rod subcomponent 3, dual thrust parts of bearings 4, rear guiding parts 5, fore bearing component 6, preceding guiding parts 7, detachable preceding seal modules device 8, rear sealed connection module 9 and preceding attachment base 15.

Motor 2 includes rotor 21 and stator 22, and rotor 21 has a cavity, and stator 22 is fixed on electric cylinder cylinder body 1.Silk Thick stick subcomponent 3 includes lead screw 31 and lead screw pair nut 32, and lead screw pair nut 32 is set to lead screw 31, and lead screw 31 connects before having one Disputer 33.32 outer peripheral surface of lead screw pair nut has a flange, and 32 inner hole front of lead screw pair nut has driving function part, inner hole Rear portion has guide function part, and driving function part, guide function part and the flange of lead screw pair nut are integral structures. It is built in the cavity of rotor 21 with Fig. 3, a part of lead screw subcomponent 3 referring to Figure 2 together, specific connection side Formula is that the end face of flange of lead screw pair nut 32 and the end face of rotor 21 are locked by fastening bolt 162, and adjacent 161 tensioner of pin axis is used between fastening bolt 162, prevents periodic positive and negative rotation torsion shear force square from being formed to fastening bolt 162 tired Labor is destroyed.

Dual thrust parts of bearings 4 is mounted on behind lead screw pair nut flange, and fore bearing component 6 is mounted on electric cylinder cylinder body 1 front end, rear guiding parts 5 are mounted on the rear end of lead screw 31, and preceding guiding parts 7 is mounted on the front end of fore bearing component 6, removable The front end of guiding parts 7 before seal modules device 8 is mounted on before unloading, is used for closed front.After sealed connection module 9 is mounted on afterwards The rear end of guiding parts 5 is used for closed rear end.The preceding connection disputer 33 of preceding attachment base 15 and lead screw 31 is connected and fixed, for connecting Connect driven equipment.By the positive and negative rotation of motor 2, lead screw pair nut 32 is driven to rotate, so that lead screw 31 does straight reciprocating motion, It realizes outwardly or reciprocating sliding inwardly.

Dual thrust parts of bearings 4 includes bearing adjustment gasket 41, two secondary self-aligning thrust roller bearing 42,42 ', rear bearing block 43 and circle locking nut 44.The inner hole of rear bearing block 43 has a bulge loop.Two secondary self-aligning thrust roller bearings 42,42 ' lean against The outer peripheral surface of 32 flange rear end of lead screw pair nut is arranged in back, and two secondary self-aligning thrust roller bearings 42,42 ' are intermediate by rear bearing 43 inner hole bulge loops of seat separate.Bearing adjust the setting of gasket 41 lead screw pair nut flange and two secondary self-aligning thrust roller bearings 42, Between 42 ', bearing adjustment gasket 41 is contacted with the end face of 32 flange of lead screw pair nut.Rear bearing block 43 is arranged in electric cylinder cylinder body 1 rear end, and electric cylinder cylinder body 1 is fixed on by fastening bolt.32 rear end of lead screw pair nut is arranged in circle locking nut 44 Outer peripheral surface is simultaneously located at behind self-aligning thrust roller bearing 42,42 ', for locking self-aligning thrust roller bearing 42,42 '.

Guiding parts 5 includes support ring 51 and rear guide pad 52 afterwards.The inner hole ditch of rear guide pad 52 is arranged in support ring 51 It is contacted in slot and with the inner hole of lead screw pair nut 32, the rear targeting part of lead screw pair nut inner hole and position is arranged in rear guide pad 52 In the end of lead screw 31.Guiding parts 5 provides guiding to lead screw 31 afterwards, and radial pendulum is generated in 31 operational process of lead screw for preventing It is dynamic.

Being tightly connected module 9 afterwards includes rear flow guiding disc 91, fastening bolt 92, rear attachment base 93, and rear flow guiding disc 91 connects with after Joint chair 93 is fixed on rear bearing block 43 by fastening bolt 92.Module 9 is tightly connected afterwards to be used for screw rod subcomponent 3 and rear guiding Component 5 seals.

Fore bearing component 6 includes deep groove ball bearing 61, front-end bearing pedestal 62 and fore bearing support base 63.Fore bearing support base 63 are sleeved on lead screw 31, and are fixed on the front end of rotor 21, specifically, by pin and bolt fastening in the motor The front end of rotor 21, front-end bearing pedestal 62 are fixed on the front end of electric cylinder cylinder body 1.

Preceding guiding parts 7 includes preceding guide sleeve support ring 71, preceding guide sleeve 72, preceding guide sleeve support base 73.Preceding guide sleeve Support ring 71 is arranged in the inner hole groove of preceding guide sleeve 72 and contacts with lead screw 31, and preceding guide sleeve 72 is sleeved on lead screw 31, preceding Guide sleeve support base 73 is fixed on fore bearing component 6.Preceding guiding parts 7 generates radial pendulum for preventing in 31 operational process of lead screw It is dynamic.

Referring to Figure 4 together, preceding seal modules device 8 includes dust-proof seal ring 81, seal cover board 82, fastening bolt 83, O Type sealing ring 84.Seal cover board 82 is set in lead screw 31, guiding parts 7 before seal cover board 82 is fixed on by fastening bolt 83. Dust-proof seal ring 81 is located in the inner hole groove of seal cover board 82 and contacts at runtime with lead screw 31, can prevent from falling in lead screw The dust that disputer 33 is connected before 31 is in-house into preceding guiding parts 7 in electric cylinder operational process, and abrasion is avoided to aggravate, into And extend the service life of preceding guiding parts 7.O-ring seal 84 be located in 82 inner hole groove of seal cover board and with preceding guiding parts 7 contacts can prevent dust from entering preceding guiding parts 7 in-house.

Also referring to Fig. 5 and Fig. 6, in the present embodiment, preceding attachment base 15 has a boss, and there is boss a linking to match Hole is closed, preceding connection disputer 33 protrudes into linking matching hole, is fixedly connected with preceding attachment base 15.Preceding connection disputer 33 and preceding attachment base 15 Clipping type locking mechanism can be used, specifically, preceding connection disputer 33 is cylindrical body, is connected matching hole spiral shell with preceding attachment base 15 Line connection, also, preceding connection disputer 33 is fixed on the boss of preceding attachment base 15 by fastening bolt 158.

In addition, referring to Figure 7 together, preceding connection disputer 33 and preceding attachment base 15 can also use anti-rotational Tensioning structure. Specifically, at least one mating surface of the outer peripheral surface of preceding connection disputer 33 is plane, through the plane of preceding connection disputer 33 with before The cooperation of the linking matching hole of 15 boss of attachment base, limits the rotation of lead screw 31 caused by the turning moment of circumferencial direction；Exist simultaneously In coordinate contact surface by the way of 101 tensioner of pin axis.In the present embodiment, there are two cooperations for the outer peripheral surface of preceding connection disputer 33 Face is plane, which is symmetrical arranged, that is, preceding connection disputer 33 is symmetrical section structure.

When motor 2 rotates forward, rotor 21 drives lead screw pair nut 32 to rotate, and turning moment is rolled by lead screw pair nut 32 Ball driving lead screw 31 in road is pushed forward, and then realizes that heavy duty is pushed forward.At this point, what the ball in 32 raceway of lead screw pair nut was born The moment of reaction acts directly on lead screw pair nut 32, then acts on bearing adjustment by the end face of flange of lead screw pair nut 32 Gasket 41, then pass to self-aligning thrust roller bearing 42, then after being passed to by the 43 inner hole bulge loop of rear bearing block contacted that connects Bearing block 43, then rear flow guiding disc 91 is passed to, finally, moment loading is on rear attachment base 93.Entire heavy duty is pushed forward operational process In, the fastening bolt of electric cylinder cylinder body 1 and each components is not subject to squeeze and stretch alternation torque, only lead screw subcomponent 3, bearing adjustment gasket 41, rear bearing block 43 and rear flow guiding disc 91 and rear attachment base 93 bear torque.

When motor 2 inverts, rotor 21 drives lead screw pair nut 32 to rotate, and turning moment passes through lead screw pair nut 32 Ball in raceway drives 31 post-tensioning of lead screw, and then realizes underloading post-tensioning.At this point, the ball in 32 raceway of lead screw pair nut is born The moment of reaction act directly on lead screw pair nut 32, then self-aligning thrust roller bearing is acted on by circle locking nut 44 42 ', then 43 inner hole bulge loop of rear bearing block is passed to, then pass between rear bearing block 43 and rear flow guiding disc 91 and rear attachment base 93 Fastening bolt 92, finally, moment loading is on rear attachment base 93.It is entirely lightly loaded in post-tensioning operational process, only lead screw pair group Fastening bolt 92 between part 3, rear bearing block 43 and rear flow guiding disc 91 and rear attachment base 93 bears stretch force moment, fastening bolt 92 Behaviour in service can be confirmed whether that exception, controllability are good by Daily Round Check.

The present embodiment is placed on 32 flange rear end outer peripheral surface of lead screw pair nut, two secondary thrusts using dual thrust parts of bearings 4 Self-aligning roller bearing 42/42 ' is arranged as being divided to column back-to-back and two secondary self-aligning thrust roller bearings 42/42 ' are intermediate by rear bearing block 43 inner hole bulge loops separate.No matter the lead screw 31 of lead screw subcomponent 3 is that heavy duty is pushed forward or is lightly loaded post-tensioning, the torsion drag torque generated It does not all act on 43 front end of rear bearing block to the fastening bolt and electric cylinder cylinder body 1 between preceding guide sleeve support base 73, it can It is destroyed to avoid fatigue stress is generated to it during continuous push-pull operation for a long time, not preventible loosening or disconnected occurs It splits, guarantees the reliability and stability of electric cylinder 10, improve the service life of electric cylinder 10.

The present embodiment lead screw subcomponent 3 is built in the cavity of servo motor rotor 21, and connection type is lead screw pair nut The end face and 21 end face of servo motor rotor of flange are locked by fastening bolt 162, and between adjacent fastening bolt 162 With 161 tensioner of pin axis, it can prevent periodic positive and negative rotation from turning round shear force square and fatigue rupture is formed to fastening bolt 162, improve The service life of electric cylinder 10.

32 inner hole rear portion of the present embodiment lead screw pair nut has guide function, the driving function with 32 front of lead screw pair nut Part and flange are integral structures, are cooperated with guiding parts 7 before the guide pad 52 and electric cylinder of 31 rear end of lead screw is mounted on, institute To limit radially wobbling of generating in 31 operational process of lead screw in electric cylinder, guarantee high-precision coaxial degree, reduces friction resistance Power reduces abrasion, improves stability and reliability that electric cylinder 10 is run, extends the service life of electric cylinder 10.Meanwhile one Change does not need fastening bolt to connect between structure, caused by the alternate stress formed during can pushing and pulling repeatedly to avoid lead screw Fatigue rupture extends the service life of electric cylinder 10.

The preceding connection disputer 33 and preceding attachment base 15 of the present embodiment lead screw 31 are fixed using clipping type locking mechanism, that is, logical The locking of fastening bolt 158 is crossed, the gap of disputer and attachment base connection screw thread 156,157 is eliminated, it can be to avoid push-pull operation mistake Cheng Zhong, connection screw thread expand gap during bearing frictional force repeatedly and impact force, avoid result in fatigue damage, reduce mill Damage, prolongs the service life.

It is appreciated that since the preceding connection disputer 33 and preceding attachment base 15 of lead screw 31 can also use anti-rotational Tensioning structure It is fixed, that is, pass through the linking matching hole mode of 15 boss of preceding connection disputer symmetrical section structure and preceding attachment base of lead screw 31, institute To limit the rotation of lead screw 31 caused by the turning moment of circumferencial direction；Risen in coordinate contact surface using pin axis 101 simultaneously Tight mode, further eliminates fit clearance, avoids fit clearance from wearing in the process of running excessive, generates to loosen and hit, breaks The normal linking of bad connecting portion cooperates.

Guiding parts 7 uses removable seal device 8 before the present embodiment lead screw 31, dust-proof in the removable seal device Sealing ring 81 is located in the inner hole groove of seal cover board 82 and contacts at runtime with lead screw 31, so, it can prevent from falling in silk The dust that disputer 33 is connected before thick stick 31 is in-house into preceding guiding parts 7 in electric cylinder operational process, and abrasion is avoided to aggravate, And then extend the service life of preceding guiding parts 7.

Electric cylinder 10 further comprises cooling outer circulation structure, cools down outer circulation structure for lead screw subcomponent and each activity The lubricating oil of component running protection is guided out electric cylinder cylinder body and is filtered, cools down.Cooling outer circulation structure includes magnetic-type mistake Filter, heat exchanger, fuel tank, oil pump and delivery pipe.Electric cylinder includes input port, loop exit, loop head and output Mouthful.Input port is located at electric cylinder cylinder body rear portion periphery, and loop exit is located at electric cylinder cylinder body front periphery, and loop head is located at electricity Dynamic cylinder front-end bearing pedestal, delivery outlet are located at the periphery of electric cylinder rear bearing block.Oil pump is connected with fuel tank, for by the lubrication in fuel tank Input port is extracted and be delivered to oil out, and lubricating oil comes out from loop exit by the intracorporal cavity of cylinder, is transferred to and followed again by delivery pipe Ring entrance, by the cavity of lead screw subcomponent and the running gears such as bearing inside electric cylinder, finally from the delivery outlet of electric cylinder Then outflow comes out the impurity absorption in lubricating oil by magnetic-type filter, then by heat exchange to lubricating oil cooling after Flow back into fuel tank.

Referring to Fig. 8, in the present embodiment, cooling outer circulation structure 11 include magnetic-type filter 111, heat exchanger 112, Fuel tank 113, oil pump 114, the first temperatuer detector 115, second temperature detection meter 116, first check-valve 117, second check-valve 118 and delivery pipe.Input port 12 is provided with the first temperatuer detector 115 and first check-valve 117.First temperatuer detector 115 for measuring the temperature of lubricating oil at input port.Delivery outlet 13 is provided with second temperature detection meter 116 and second check-valve 118, second temperature detection meter 116 is for measuring the temperature of equipped at outlet port lubricating oil.It is adjusted according to the temperature requirement to lubricating oil The refrigerating capacity of whole heat exchanger 112, so that the temperature of 13 lubricating oil of input port 12 and delivery outlet reaches specified value.

After oil pump 114 starts, the lubricating oil in fuel tank 113 is transported to the input port 12 of electric cylinder by delivery pipe, passed through Electric cylinder cylinder body internal cavity is crossed, is come out from electric cylinder loop exit 14, electric cylinder loop head 15 is transferred to, inside electric cylinder Lead screw subcomponent and the running gears such as bearing cavity, finally come out from the delivery outlet of electric cylinder 13, then by magnetic-type Filter 111 comes out the impurity absorption in lubricating oil, then flows back into fuel tank after cooling down by heat exchanger 112 to lubricating oil 113.It is provided with first check-valve 117 between the first temperatuer detector 115 and magnetic-type filter 111, is lubricated for preventing Oil is flow backwards into electric cylinder.It is provided with second check-valve 118 between second temperature detection meter 116 and fuel tank 113, when oil pump 114 When the pressure of the lubricating oil of output is greater than specified value, second check-valve 118 is opened under the action of lubricating oil flow, lubricates oil stream Oil-feed tank 113.

The electric cylinder 10 of the present embodiment includes cooling outer circulation structure 11, that is to say, that electric cylinder 10 uses electric cylinder Lubricating oil export/the guiding structure for running parts runs temperature effectively reducing parts using external efficient heat-exchange device While spending, impurity inside electric cylinder is discharged by the export of lubricating oil, is imported again after filtration, guarantees that operation parts are good Good lubricant effect can be effectively reduced the abrasion of electric cylinder operation parts, improve the ability of antifatigue destruction, improve electronic Cylinder reliability of operation, stability and service life.

Above embodiments are only for illustration of the utility model, rather than limitations of the present invention, the art Those of ordinary skill can also make various transformation or variation in the case where not departing from the spirit and scope of the utility model. Therefore, all equivalent technical solutions also should belong to the scope of the utility model, should be claimed with each claim Subject to range.

Claims (10)

1. a kind of electric cylinder of external cooling cycle structure comprising: electric cylinder ontology and cooling cycle structure, outside the cooling The outside of the electric cylinder ontology is arranged in loop structure, the cooling outer circulation structure include filter, heat exchanger, fuel tank, Oil pump and delivery pipe, after the pump start, the lubricating oil in the fuel tank is delivered to electric cylinder ontology by delivery pipe Input port, lubricating oil are exported out, is transferred to again by delivery pipe by the intrinsic cavity of electric cylinder from electric cylinder bulk circulation Electric cylinder bulk circulation entrance, by the cavity of electric cylinder body interior running gear, finally from the delivery outlet of electric cylinder ontology Then outflow passes through heat exchanger by the filter again and flows back into the fuel tank.

2. the electric cylinder of external cooling cycle structure as described in claim 1, which is characterized in that further comprise the first temperature Detection meter, second temperature detection meter, first check-valve and second check-valve, first temperatuer detector and first check-valve It is arranged at electric cylinder ontology input port, the other end of the first check-valve is connect with the heat exchanger；Described Two temperatuer detectors and second check-valve setting in the electric cylinder ontology equipped at outlet port, the other end of the second check-valve with The fuel tank connection.

3. the electric cylinder of external cooling cycle structure as described in claim 1, which is characterized in that further comprise electric cylinder cylinder Body, motor, screw rod subcomponent and dual thrust parts of bearings, the motor are mounted on the inside of the electric cylinder cylinder body, including Stator and rotor；The screw rod subcomponent includes lead screw and the lead screw pair nut that lead screw is arranged in, which is fixed on The rotor, the lead screw pair nut outer peripheral surface have a flange；The dual thrust parts of bearings includes two secondary thrust force aligning rollers Bearing and rear bearing block, the rear bearing block inner hole have a bulge loop, and described two secondary self-aligning thrust roller bearings are arranged back-to-back In lead screw pair nut flange rear end outer peripheral surface, and by the rear bearing block bulge loop point among the two secondary self-aligning thrust roller bearing Every, and by circle locking nut locking, the rear bearing block is fixed on the electric cylinder cylinder body.

4. the electric cylinder of external cooling cycle structure as claimed in claim 3, which is characterized in that the dual thrust parts of bearings It further comprise bearing adjustment gasket, which adjusts gasket setting in the lead screw pair nut flange and two secondary thrust force aligning rollings Between sub- bearing.

5. the electric cylinder of external cooling cycle structure as claimed in claim 3, which is characterized in that the lead screw pair nut inner hole Front has driving function part, and inner hole rear portion has guide function part, and the driving function part of the lead screw pair nut is led It is integral structure to funtion part and flange.

6. the electric cylinder of external cooling cycle structure as claimed in claim 5, which is characterized in that further comprise rear guide part Part and preceding guiding parts, the rear guiding parts include rear guide pad, which is arranged in the lead screw pair nut inner hole Guide function part and the end for being located at the lead screw；The preceding guiding parts includes preceding guide sleeve support ring, preceding guide sleeve, preceding Guide sleeve support base, the preceding guide sleeve support ring are arranged in the inner hole groove of the preceding guide sleeve and connect with the lead screw Touching, the preceding guide sleeve are sleeved on the lead screw, and the preceding guide sleeve support base is fixed on the electric cylinder cylinder body.

7. the electric cylinder of external cooling cycle structure as claimed in claim 3, which is characterized in that the company of sealing after further comprising Connection module, the rear sealed connection module include rear flow guiding disc and rear attachment base, and the rear flow guiding disc and rear attachment base are fixed on The rear bearing block.

8. the electric cylinder of external cooling cycle structure as claimed in claim 3, which is characterized in that further comprise front axle bearing portion Part, the fore bearing component include deep groove ball bearing, front-end bearing pedestal and fore bearing support base, and the fore bearing support base is sleeved on The lead screw, the front-end bearing pedestal are fixed on the front end of the electric cylinder cylinder body.

9. the electric cylinder of external cooling cycle structure as claimed in claim 6, which is characterized in that further comprise preceding sealed mould Block assembly, which includes dust-proof seal ring, seal cover board, O-ring seal, and the seal cover board is set in institute Lead screw is stated, the seal cover board is fixed on the preceding guiding parts, and the dust-proof seal ring is located at the inner hole of the seal cover board Contact in groove and with the lead screw at runtime, the O-ring seal be located at the seal cover board inner hole groove it is interior and with institute It states leading to component contact.

10. the electric cylinder of external cooling cycle structure as claimed in claim 3, which is characterized in that the lead screw connects before having Disputer is connect, the electric cylinder further comprises preceding attachment base, which has a boss, which there is a linking to match Close hole, it is described before outer peripheral surface at least one mating surface of connection disputer be plane, it is described before connection disputer plane with it is described The linking matching hole of preceding attachment base boss cooperates.