CN112460193B - Electric loader with hydraulic buffer device - Google Patents

Electric loader with hydraulic buffer device Download PDF

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Publication number
CN112460193B
CN112460193B CN202011395248.4A CN202011395248A CN112460193B CN 112460193 B CN112460193 B CN 112460193B CN 202011395248 A CN202011395248 A CN 202011395248A CN 112460193 B CN112460193 B CN 112460193B
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end cover
bearing
ring
valve
piston
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CN112460193A (en
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闫世程
薛亚红
葛家尚
张健钊
王占朝
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Tianjin University of Technology
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Tianjin University of Technology
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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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2247—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with rollers
    • 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
    • F16H25/2418—Screw seals, wipers, scrapers or the like
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H2025/2062—Arrangements for driving the actuator
    • F16H2025/2075—Coaxial drive motors

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transmission Devices (AREA)
  • Actuator (AREA)

Abstract

The invention provides an electric loader with a hydraulic buffer device, which belongs to the field of mechanical and electric servo loading and comprises a motor and a loading mechanism, wherein the output end of the motor is connected with the input end of the loading mechanism, the loading mechanism comprises a buffer assembly, the buffer assembly comprises a first shell, a working cylinder barrel, a guide seat, a compensating valve, a compression valve, a sealing ring, a spring, an oil seal, a gasket, an oil seal cover, a movable piston, a circulation valve, an extension valve and a piston rod, the first shell comprises a first left end cover, an oil storage cylinder barrel and a right end cover, and the first left end cover, the oil storage cylinder barrel and the right end cover are coaxially arranged from left to right. The buffer assembly can effectively relieve the rigid impact of external load, has the functions of buffering and damping vibration and protects a loading device and loaded components.

Description

Electric loader with hydraulic buffer device
Technical Field
The invention belongs to the field of mechanical and electric servo loading, and relates to an electric loader with a hydraulic buffer device.
Background
Along with the development of servo control technology, electrical and electronic products and precision transmission parts, the electric loading device is widely applied to the fields of aerospace, intelligent manufacturing, medical instruments, engineering machinery, national defense and military industry and the like, and compared with the traditional mechanical and hydraulic loading device, the electric loading device has the advantages of high transmission efficiency, good electrical synchronism, stable work and operation, compact structure, convenience in maintenance and the like, and is more and more favored by the majority of technical workers.
In the prior art, a mechanical spring is mostly adopted as a load buffering component of an electric loading device. Chinese patent CN201711488253.8 discloses an electronic jar loading double spring buffer, among the technical scheme, because double spring buffer's rigidity is great, yielding damage after suffering impact load, the structure is comparatively complicated to the spring is easy fatigue failure under the effect of alternating stress repeatedly, can cause device mechanical structure to age with higher speed, is unfavorable for the maintenance in later stage. Chinese patent CN201510137801.7 discloses a bidirectional double-acting integrated loader, in the technical scheme, two sets of belleville springs are used as load output and buffering components, and because the belleville springs belong to the special-shaped springs, the requirement of manufacturing precision is high, the processing cost is high, and the load deviation is difficult to be ensured. Chinese patent CN201610116836.7 discloses an axial loading device for a harmonic reducer vibration detection table, in this technical scheme, a compression spring is used as a buffer component to output a flexible load, and because the spring is in a compressed state, the axial loading device can only output a compression load, and cannot provide a dynamic load or a static load in a stretching direction. When the dynamic load or the static load which can output stretching and compressing directions is provided for the electric loader, and the loading precision requirement is high, the load stability is good, the loading feedback response is fast, the mechanical structure is compact, and other harsh requirements are met, the existing electric loading device can not meet the requirements.
Disclosure of Invention
The invention aims to solve the problem that an electric loader with a hydraulic buffer device belongs to the field of mechanical and electric servo loading, and a buffer assembly can effectively relieve the rigid impact of an external load, has the functions of buffering and damping vibration and protects a loading device and loaded components.
In order to solve the technical problems, the invention adopts the technical scheme that: an electric loader with a hydraulic buffer device belongs to the field of mechanical electric servo loading, and comprises a motor and a loading mechanism, wherein the output end of the motor is connected with the input end of the loading mechanism, the loading mechanism comprises a buffer assembly, the buffer assembly comprises a first shell, a working cylinder, a guide seat, a compensating valve, a compression valve, a sealing ring, a spring, an oil seal, a gasket, an oil seal cover, a movable piston, a circulation valve, an extension valve and a piston rod, the first shell comprises a first left end cover, an oil storage cylinder and a right end cover, the first left end cover, the oil storage cylinder and the right end cover are coaxially arranged from left to right, the working cylinder and the guide seat are arranged in the first shell, the guide seat is fixed at the right end of the working cylinder, the compensating valve and the compression valve are arranged on the working cylinder, the right end of the guide seat is provided with a first bulge, the oil seal, the gasket and the oil seal cover are coaxially and sequentially arranged from left to right, the first bulge, the spring and the sealing ring are coaxially arranged from inside to outside, an oil storage cavity is arranged between the first shell and the working cylinder barrel, the guide seat and the sealing ring, the movable piston is installed in the working cylinder barrel, a left cavity is arranged on the left side of the movable piston, a right cavity is arranged on the right side of the movable piston, the piston rod sequentially penetrates through the movable piston, the guide seat, an oil seal, a gasket, an oil seal cover and a right end cover from left to right, the left end of the piston rod is fixed on the movable piston, the circulation valve and the expansion valve are installed on the movable piston, hydraulic oil is arranged in the oil storage cavity, the left cavity and the right cavity, and by utilizing the damping effect and the energy transfer function of the hydraulic oil, the rigid impact of external load can be effectively relieved, the buffering and vibration damping functions are achieved, and the loading device and loaded components are protected.
Furthermore, the number of the buffer assemblies is 2-6.
Furthermore, the loading mechanism also comprises a main screw, a plurality of rollers, an inner gear ring, a screw nut seat, a first sealing end cover, an extension piston, a first bearing, a first elastic retainer ring and a connecting joint, wherein the left end of the main screw is connected with the output end of the motor, the rollers are distributed at equal intervals in the circumferential direction, the rollers are arranged in parallel with the main screw and are in threaded connection with the main screw, the left end and the right end of each roller are provided with a second bulge, the inner gear ring is arranged on the second bulge and is meshed with the second bulge, the screw nut seat is coaxially arranged on the outer side of the main screw and is meshed with the rollers, the first sealing end cover is fixed on the left side of the screw nut seat, the right side of the screw nut seat is fixed on the left side of the buffer component, the extension piston is arranged on the right side of the piston rod, the left side surface extending out of the piston is provided with an opening, the first bearing is fixed in the opening, the first elastic retainer ring is arranged on the right side of the first bearing, the inner diameter of the first elastic check ring is smaller than the diameter of the bearing inner ring of the first bearing, the main screw rod penetrates through the opening and the bearing inner ring of the first bearing and is arranged on the left side of the first elastic check ring, and a connecting joint is arranged on the right side extending out of the piston.
Furthermore, the loading mechanism further comprises a retainer and a second elastic check ring, the main screw rod penetrates through the retainer and the second elastic check ring, the retainer is installed on one side, away from the roller, of the inner gear ring, and the second elastic check ring is installed on one side, away from the inner gear ring, of the retainer.
Furthermore, the loading mechanism further comprises a second shell, a felt oil ring, a shaft sleeve, a bearing seat, a second bearing and a locking nut, the main lead screw horizontally penetrates through the second shell, the felt oil ring, the shaft sleeve, the bearing seat, the second bearing and the locking nut, the first shell and the second shell are coaxially arranged from inside to outside, the second shell comprises a second sealing end cover, a second left end cover, an outer cylinder barrel and a third sealing end cover, the second left end cover, the outer cylinder barrel and the third sealing end cover are fixedly connected from left to right in sequence, a groove is formed in the inner side of the second sealing end cover, the felt oil ring is embedded in the groove, the bearing seat is fixed on the right side of the second sealing end cover, the second bearing is fixed in the bearing seat, and the locking nut is fixed on the left side of the second bearing.
Furthermore, the loading mechanism further comprises a connecting sleeve and a fourth sealing end cover, the connecting sleeve and the fourth sealing end cover are arranged in the second shell, the main lead screw penetrates through the connecting sleeve and the fourth sealing end cover, the connecting sleeve is fixed on the right side of the right end cover, and the fourth sealing end cover is fixed on the right side of the connecting sleeve.
Furthermore, the device also comprises a rotary speed reducer, wherein the input end of the rotary speed reducer is connected with the output end of the motor, and the output end of the rotary speed reducer is connected with the input end of the loading mechanism.
The device further comprises a coupler, wherein the input end of the coupler is connected with the output end of the rotary speed reducer, and the output end of the coupler is connected with the input end of the loading mechanism.
Compared with the prior art, the invention has the advantages and positive effects as follows:
1. the buffer assembly can effectively relieve the rigid impact of external load, has the functions of buffering and damping vibration and protects a loading device and loaded components.
2. The invention has the advantages that the range, the speed, the precision and other key parameters of the output load are closely related to the performance of the servo control valve of the buffer assembly, the flow and the pressure of hydraulic oil are controlled by adjusting the electric analog signal of the servo valve, the electric automation is conveniently realized, the actual characteristic requirements of load output are met, the purposes of continuous and stable load output, obviously improved load regulation and control range and obviously improved loading precision are achieved.
3. The buffer assembly controls the flow direction and pressure of hydraulic oil by regulating the closing and opening sizes of the control valve, so that the movable piston is pushed to drive the piston rod to reciprocate left and right, the tension-compression type loading of the electric loader is realized, and meanwhile, the application of dynamic and static loads of the electric loader can be realized by regulating the parameters such as the displacement size, the moving speed, the reciprocating frequency and the like of the output shaft of the motor, and the accurate control of load output is realized.
4. The number of the buffer assemblies is 2-6, and the distances between the adjacent buffer assemblies are equal, so that the stability of load output of the extending piston and the coordination of movement are ensured.
5. The main screw rod penetrates through the retainer and the second elastic check ring, the retainer is arranged on one side of the inner gear ring, which is far away from the roller, the position of the roller in the horizontal direction is limited, and the roller is prevented from loosening.
6. The input end of the rotary speed reducer is connected with the output end of the motor, the output end of the rotary speed reducer is connected with the input end of the loading mechanism, and the rotary speed reducer can effectively improve the transmission ratio of the electric loader, enhance the bearing performance of the electric loader, improve the transmission precision and the load transmission efficiency of the electric loader, and has the advantages of simple structure, small size, light weight and the like.
7. The input end of the coupling is connected with the output end of the rotary speed reducer, and the output end of the coupling is connected with the input end of the loading mechanism, so that the coupling is convenient to mount, dismount and maintain, and has high integration degree.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic cross-sectional view of an electric loader with a hydraulic cushion according to the present invention;
FIG. 2 is a schematic cross-sectional view of the loading mechanism of the electric loader with hydraulic cushion of the present invention;
fig. 3 is a schematic cross-sectional view of a damper assembly of the electric loader with hydraulic damper apparatus of the present invention.
Reference numerals:
1. a motor; 2. a loading mechanism; 5. rotating the speed reducer; 6. a coupling; 21. a buffer assembly; 22. a main lead screw; 23. a roller; 24. an inner gear ring; 25. a lead screw nut seat; 26. a first end seal cap; 27. extending the piston; 28. a first bearing; 29. a first circlip; 30. connecting a joint; 31. a holder; 32. a second circlip; 33. a second housing; 34. felt sealing oil ring; 35. a shaft sleeve; 36. a bearing seat; 37. a second bearing; 38. locking the nut; 39. a connecting sleeve; 40. a fourth end seal cap; 211. a first housing; 212. a working cylinder barrel; 213. a guide seat; 214. a compensation valve; 215. a compression valve; 216. a seal ring; 217. a spring; 218. oil sealing; 219. a gasket; 220. sealing the oil cover; 221. an oil storage chamber; 222. a moving piston; 223. a left chamber; 224. a right chamber; 225. a flow-through valve; 226. a valve is extended; 227. a piston rod; 231. a second protrusion; 331. a second end seal cap; 332. a second left end cap; 333. an outer cylinder barrel; 334. a third end seal cap; 2111. a first left end cap; 2112. an oil storage cylinder; 2113. a right end cap; 2131. a first protrusion.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The following detailed description of specific embodiments of the invention refers to the accompanying drawings.
As shown in fig. 1 to 3, the present invention relates to an electric loader with a hydraulic buffer device, which belongs to the field of mechanical and electric servo loading, and comprises a motor 1 and a loading mechanism 2, wherein an output end of the motor 1 is connected with an input end of the loading mechanism 2, the loading mechanism 2 comprises a buffer assembly 21, the buffer assembly 21 comprises a first housing 211, a working cylinder 212, a guide seat 213, a compensation valve 214, a compression valve 215, a sealing ring 216, a spring 217, an oil seal 218, a gasket 219, an oil seal cover 220, a movable piston 222, a flow valve 225, an extension valve 226 and a piston rod 227, the first housing 211 comprises a first left end cover 2111, an oil storage cylinder 2112 and a right end cover 2113, the first left end cover 2111, the oil storage cylinder 2112 and the right end cover 2113 are coaxially arranged from left to right, the working cylinder 212 and the guide seat 213 are installed in the first housing 211, the guide seat 213 is fixed at the right end of the working cylinder 212, the compensation valve 214 and the compression valve 215 are installed on the working cylinder 212, the right end of the guide seat 213 is provided with a first protrusion 2131, the first protrusion 2131, an oil seal 218, a gasket 219 and an oil seal cover 220 are coaxially and sequentially arranged from left to right, the first protrusion 2131, a spring 217 and a seal ring 216 are coaxially and sequentially arranged from inside to outside, an oil storage cavity 221 is arranged between the first shell 211 and the working cylinder 212, the guide seat 213 and the seal ring 216, the movable piston 222 is arranged in the working cylinder 212, the left side of the movable piston 222 is provided with a left chamber 223, the right side of the movable piston 222 is provided with a right chamber 224, a piston rod 227 sequentially penetrates through the movable piston 222, the guide seat 213, the oil seal 218, the gasket 219, the oil seal cover 220 and a right end cover 2113 from left to right, the left end of the piston rod 227 is fixed on the movable piston 222, and the circulation valve 225 and the expansion valve 226 are arranged on the movable piston 222.
Preferably, the number of the buffer assemblies 21 is 2-6, and the distances between the adjacent buffer assemblies 21 are equal, so that the load output smoothness and the movement coordination of the extension piston 27 are ensured.
Preferably, the loading mechanism 2 further includes a main screw 22, rollers 23, an inner gear ring 24, a screw nut seat 25, a first end seal cover 26, an extension piston 27, a first bearing 28, a first elastic retainer 29 and a connecting joint 30, the left end of the main screw 22 is connected with the output end of the motor 1, the rollers 23 are distributed at equal intervals in the circumferential direction, the rollers 23 are arranged parallel to the main screw 22 and are in threaded connection with the main screw 22, the left and right ends of the rollers 23 are provided with second protrusions 231, the inner gear ring 24 is mounted on the second protrusions 231 and is engaged with the second protrusions 231, the screw nut seat 25 is coaxially arranged outside the main screw 22 and is engaged with the rollers 23, the first end seal cover 26 is fixed on the left side of the screw nut seat 25, the right side of the screw nut seat 25 is fixed on the left side of the buffer assembly 21, the extension piston 27 is mounted on the right side of the piston rod 227, the left side of the extension piston 27 is provided with an opening, the first bearing 28 is fixed in the opening, the first elastic check ring 29 is installed on the right side of the first bearing 28, the inner diameter of the first elastic check ring 29 is smaller than the diameter of the inner bearing ring of the first bearing 28, the main screw rod 22 penetrates through the opening and the inner bearing ring of the first bearing 28 and is arranged on the left side of the first elastic check ring 29, the right side extending out of the piston 27 is provided with a connecting joint 30, and the connecting joint 30 can be provided with external threads so as to be conveniently and fixedly connected with a loaded component in a threaded connection mode.
Preferably, the loading mechanism 2 further comprises a retainer 31 and a second elastic retainer 32, the main screw 22 passes through the retainer 31 and the second elastic retainer 32, the retainer 31 is installed on the side of the inner gear ring 24 away from the rollers 23 to limit the position of the rollers 23 in the horizontal direction and ensure that the rollers 23 are not loosened, and the second elastic retainer 32 is installed on the side of the retainer 31 away from the inner gear ring 24.
Preferably, the loading mechanism 2 further comprises a second housing 33, a felt oil ring 34, a shaft sleeve 35, a bearing seat 36, a second bearing 37 and a lock nut 38, the main screw 22 horizontally penetrates through the second housing 33, the felt oil ring 34, the shaft sleeve 35, the bearing seat 36, the second bearing 37 and the lock nut 38, the first housing 211 and the second housing 33 are coaxially arranged from inside to outside, the second housing 33 comprises a second sealing end cover 331, a second left end cover 332, an outer cylinder 333 and a third sealing end cover 334, the second sealing end cover 331, the second left end cover 332, the outer cylinder 333 and the third sealing end cover 334 are fixedly connected from left to right, a groove is formed in the inner side of the second sealing end cover 331, the felt oil ring 34 is embedded in the groove, the bearing seat 36 is fixed on the right side of the second sealing end cover 331, the second bearing 37 is fixed in the bearing seat 36, the lock nut 38 is fixed on the left side of the second bearing 37, and limits the position of the second bearing 37 in the horizontal direction, it is ensured that the second bearing 37 does not come loose.
Preferably, the loading mechanism 2 further includes a connecting sleeve 39 and a fourth end cap 40, the connecting sleeve 39 and the fourth end cap 40 are disposed in the second housing 33, the main lead screw 22 passes through the connecting sleeve 39 and the fourth end cap 40, the connecting sleeve 39 is fixed to the right side of the right end cap 2113, and the fourth end cap 40 is fixed to the right side of the connecting sleeve 39, and is used for limiting the main lead screw 22.
Preferably, still include rotation reducer 5, rotation reducer 5's input and motor 1's output are connected, and rotation reducer 5's output and loading mechanism 2's input are connected, and rotation reducer 5 can effectively improve the drive ratio of electronic loader, strengthens its bearing capacity, promotes its transmission precision and load transmission efficiency to have advantages such as simple structure, small, light in weight concurrently.
Preferably, still include shaft coupling 6, the input of shaft coupling 6 and the output of rotary reducer 5 are connected, and the output of shaft coupling 6 and the input of loading mechanism 2 are connected, and the installation of being convenient for is dismantled the maintenance, and the degree of integration height.
In the actual working process, when the electric loader needs to output a compression load, the motor 1 is started, the motor 1 rotates forward to rotate the output shaft of the motor 1, the speed and torque are reduced and increased through the rotating speed reducer 5, the motion and the power are transmitted to the main screw rod 22 through the coupler 6, the main screw rod 22 respectively drives the roller 23, the screw rod nut seat 25 and the buffer assembly 21 to do linear motion, at this time, a certain amount of hydraulic oil is stored in the oil storage cavity 221, the left chamber 223 and the right chamber 224 of the buffer assembly 21, the hydraulic control valves such as the compensation valve 214, the compression valve 215, the flow valve 225 and the expansion valve 226 are all in a closed state, so that certain pressure is generated inside the oil storage cavity 221, the left chamber 223 and the right chamber 224, the relative position between the movable piston 222 and the working cylinder 212 is kept unchanged, and the piston rod 227 drives the extending piston 27 and the connecting joint 30 to continue to do linear motion rightward under the guiding action of the shaft sleeve 35, the fourth sealing end cover 40 and the third sealing end cover 334, until the connecting joint 30 is in contact with the loaded component, the relative position is fixed. When the connecting joint 30 contacts with the loaded component, the piston rod 227 of the buffer assembly 21, the extension piston 27 and the connecting joint 30 stop moving linearly, the screw nut seat 25 and the buffer assembly 21 fixed with the screw nut seat continue moving linearly to the right under the drive of the motor 1, the working cylinder 212 in the buffer assembly 21 moves to the right, while the piston rod 227 is fixed, so that the volume of the left chamber 223 is reduced, the pressure of the hydraulic oil is increased, the pressure is transmitted to the loaded component through the moving piston 222, the piston rod 227, the extension piston 27 and the connecting joint 30, when the pressure provided by the buffer assembly 21 reaches the set output load, the flow valve 225 is opened, the hydraulic oil flows through the flow valve 225 to enter the right chamber 224, because the right chamber 224 is partially occupied by the piston rod 227, the increased volume of the right chamber 224 is smaller than the reduced volume of the left chamber 223, and a part of the left chamber 223 pushes open the compression valve 215, and the hydraulic oil flows back to the oil storage cavity 221, so that the output pressure of the buffer assembly 21 is kept stable, the electric loader applies static load to a loaded component, meanwhile, the hydraulic valve performs a damping function when outputting a compression load to the electric loader under the throttling action of the hydraulic oil, and in the process, the right end cover 2113 performs a limiting effect on the extending piston 27. In addition, when a dynamic pressure load needs to be applied to the loaded component, the dynamic pressure load can be realized by regulating and controlling parameters such as displacement magnitude, rotating speed, rotating frequency and the like of the output shaft of the motor 1, or by regulating parameters such as opening closing, flow rate magnitude, system pressure and the like of the compensating valve 214, the compression valve 215, the flow through valve 225 and the extension valve 226, the buffering component 21 can adjust the load output characteristics by changing the parameters of the compensating valve 214, the compression valve 215, the flow through valve 225 and the extension valve 226, so as to achieve the purpose of regulating and controlling the working performance of the electric loader, such as load range, output speed, loading precision and the like, therefore, the flexible transmission of the output load of the electric loader, the effective adjustment of the stroke and the efficient control of the vibration amplitude and the vibration load are realized, and the aims of continuous and stable load output, obviously improved load regulation and control range and obviously improved loading precision are achieved.
When the electric loader needs to output a tensile load, the connecting joint 30 and the loaded component are fixedly connected in a threaded connection mode and the like, then the motor 1 is started, the motor 1 rotates reversely to enable an output shaft of the motor to provide reverse rotation motion, after the speed and the torque are reduced and increased through the rotating speed reducer 5, the motion and the power are transmitted to the main screw rod 22 through the coupler 6, the main screw rod 22 respectively drives the roller 23, the screw rod nut seat 25 and the buffer assembly 21 to do linear motion, at the moment, a certain amount of hydraulic oil is stored in an oil storage cavity 221, a left cavity 223 and a right cavity 224 of the buffer assembly 21, and hydraulic control valves such as the compensation valve 214, the compression valve 215, the circulation valve 225 and the extension valve 226 are all in a closed state, so that certain pressure can be generated inside the oil storage cavity 221, the left cavity 223 and the right cavity 224, and the screw rod nut seat 25 and the buffer assembly 21 fixed with the screw rod nut seat 25 continue to do linear motion leftwards under the driving of the motor 1, the working cylinder 212 and the movable piston 222 inside the buffer assembly 21 will generate relative displacement, so that the volume of the right chamber 224 is reduced, the hydraulic oil pressure is increased, the pressure is transmitted to the loaded component through the movable piston 222, the piston rod 227, the extension piston 27 and the connecting joint 30, when the tensile force provided by the buffer assembly 21 reaches the set output load, the hydraulic oil in the right chamber 224 pushes the extension valve 226 to enter the left chamber 223, because the right chamber 224 is partially occupied by the piston rod 227, the hydraulic oil flowing out from the right chamber 224 is not enough to fill the increased volume of the left chamber 223, so that a certain vacuum degree is generated in the left chamber 223, at this time, the hydraulic oil in the oil storage chamber 221 opens the compensation valve 214 to enter the left chamber 223 for supplement, so as to keep the output tensile force of the buffer assembly 21 stable, the electric loader applies static tensile load to the loaded component, and simultaneously the compensation valve 214 and the compression valve 215 apply static tensile load to the loaded component, The throttling effect of the flow valve 225 and the expansion valve 226 on hydraulic oil can play a role in damping vibration when the electric loader outputs tensile load, and in the process, the right end cover 2113 plays a role in limiting and protecting the extension piston 27. In addition, when a dynamic tensile load needs to be applied to the loaded component, the dynamic tensile load can be realized by regulating and controlling parameters such as the displacement size, the rotating speed, the rotating frequency and the like of the output shaft of the motor 1, and can also be realized by regulating parameters such as the opening closing, the flow rate size, the system pressure and the like of the compensation valve, the compression valve 215, the flow valve 225 and the expansion valve 226.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims (5)

1. Take hydraulic buffer's electronic loader, its characterized in that: the loading mechanism comprises a buffer assembly, the buffer assembly comprises a first shell, a working cylinder, a guide seat, a compensating valve, a compression valve, a sealing ring, a spring, an oil seal, a gasket, an oil seal cover, a movable piston, a circulation valve, an extension valve and a piston rod, the first shell comprises a first left end cover, an oil storage cylinder and a right end cover, the first left end cover, the oil storage cylinder and the right end cover are coaxially arranged from left to right, the working cylinder and the guide seat are installed in the first shell, the guide seat is fixed at the right end of the working cylinder, the compensating valve and the compression valve are installed on the working cylinder, a first bulge is arranged at the right end of the guide seat, the first bulge, the oil seal, the gasket and the oil seal cover are coaxially arranged from left to right in sequence, the first bulge, the spring and the sealing ring are coaxially arranged from inside to outside, the first shell and the working cylinder, An oil storage cavity is arranged between the guide seat and the sealing ring, the movable piston is arranged in the working cylinder barrel, the left side of the movable piston is provided with a left cavity, the right side of the movable piston is provided with a right cavity, the piston rod sequentially penetrates through the movable piston, the guide seat, an oil seal, a gasket, an oil seal cover and a right end cover from left to right, the left end of the piston rod is fixed on the movable piston, and the circulating valve and the expansion valve are arranged on the movable piston;
the loading mechanism further comprises a main screw, a plurality of rollers, an inner gear ring, a screw nut seat, a first sealing end cover, an extension piston, a first bearing, a first elastic check ring and a connecting joint, the left end of the main screw is connected with the output end of the motor, the rollers are distributed at equal intervals in the circumferential direction, the rollers are arranged in parallel with the main screw and are in threaded connection with the main screw, second bulges are arranged at the left end and the right end of each roller, the inner gear ring is arranged on the second bulges and is meshed with the second bulges, the screw nut seat is coaxially arranged on the outer side of the main screw and is meshed with the rollers, the first sealing end cover is fixed on the left side of the screw nut seat, the right side of the screw nut seat is fixed on the left side of the buffer component, the extension piston is arranged on the right side of the piston rod, an opening is arranged on the left side face of the extension piston, the first bearing is fixed in the opening, the first elastic check ring is arranged on the right side of the first bearing, the inner diameter of the first elastic check ring is smaller than the diameter of the bearing inner ring of the first bearing, the main screw rod penetrates through the opening and the bearing inner ring of the first bearing and is arranged on the left side of the first elastic check ring, and a connecting joint is arranged on the right side extending out of the piston;
the loading mechanism further comprises a retainer and a second elastic retainer ring, the main screw rod penetrates through the retainer and the second elastic retainer ring, the retainer is installed on one side, far away from the roller, of the inner gear ring, and the second elastic retainer ring is installed on one side, far away from the inner gear ring, of the retainer;
the loading mechanism further comprises a second shell, a felt seal oil ring, a shaft sleeve, a bearing seat, a second bearing and a locking nut, the main lead screw horizontally penetrates through the second shell, the felt seal oil ring, the shaft sleeve, the bearing seat, the second bearing and the locking nut, the first shell and the second shell are coaxially arranged from inside to outside, the second shell comprises a second sealing end cover, a second left end cover, an outer cylinder barrel and a third sealing end cover, the second left end cover, the outer cylinder barrel and the third sealing end cover are fixedly connected from left to right in sequence, a groove is formed in the inner side of the second sealing end cover, the felt seal oil ring is embedded in the groove, the bearing seat is fixed on the right side of the second sealing end cover, the second bearing is fixed in the bearing seat, and the locking nut is fixed on the left side of the second bearing.
2. The electric loader with hydraulic cushion device according to claim 1, characterized in that: the number of the buffer assemblies is 2-6.
3. The electric loader with hydraulic cushion device according to claim 1, characterized in that: the loading mechanism further comprises a connecting sleeve and a fourth sealing end cover, the connecting sleeve and the fourth sealing end cover are arranged in the second shell, the main lead screw penetrates through the connecting sleeve and the fourth sealing end cover, the connecting sleeve is fixed to the right side of the right end cover, and the fourth sealing end cover is fixed to the right side of the connecting sleeve.
4. The electric loader with hydraulic cushion device according to any one of claims 1 to 3, characterized in that: the loading device is characterized by further comprising a rotary speed reducer, wherein the input end of the rotary speed reducer is connected with the output end of the motor, and the output end of the rotary speed reducer is connected with the input end of the loading mechanism.
5. The electric loader with hydraulic buffer device of claim 4, characterized in that: the loading device is characterized by further comprising a coupler, wherein the input end of the coupler is connected with the output end of the rotary speed reducer, and the output end of the coupler is connected with the input end of the loading mechanism.
CN202011395248.4A 2020-12-03 2020-12-03 Electric loader with hydraulic buffer device Active CN112460193B (en)

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JP2012209991A (en) * 2011-03-29 2012-10-25 Tokuo Takamura Electric cylinder device with both-end flange type motor
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