CN203238683U - Tension spring energy storage device type loading machine movable arm potential energy recovery regenerative device - Google Patents
Tension spring energy storage device type loading machine movable arm potential energy recovery regenerative device Download PDFInfo
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- CN203238683U CN203238683U CN 201320242231 CN201320242231U CN203238683U CN 203238683 U CN203238683 U CN 203238683U CN 201320242231 CN201320242231 CN 201320242231 CN 201320242231 U CN201320242231 U CN 201320242231U CN 203238683 U CN203238683 U CN 203238683U
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- extension spring
- swing arm
- oil
- potential energy
- pull bar
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Abstract
The utility model discloses a tension spring energy storage device type loading machine movable arm potential energy recovery regenerative device, and aims to provide the loading machine movable arm potential energy recovery regenerative device which is high in energy conversion rate, large in energy density, light in weight and simple in structure. The tension spring energy storage device type loading machine movable arm potential energy recovery regenerative device comprises a front bridge frame, a movable arm, a steel wire rope, a fixed pulley, a tension spring energy storage device and a hydraulic magnetic directional valve. According to the tension spring energy storage device type loading machine movable arm potential energy recovery regenerative device, a loading machine can recover gravitational potential energy of a working device when the movable arm declines, the gravitational potential energy is converted into elastic potential energy and stored in the tension spring energy storage device, and when the movable arm of the loading machine is lifted, the elastic potential energy stored in the tension spring energy storage device is converted into the gravitational potential energy of the movable arm, so that the goals of recovering and recycling the potential energy of the movable arm of the loading machine, saving energy and reducing emission are achieved.
Description
Technical field
The utility model relates to a kind of loading arm potential energy reclaiming device, more precisely a kind of extension spring energy storage type loading arm potential energy reclaiming device.
Background technology
In loader loading operation process, loading arm needs frequently lifting and decline, in the moved arm lifting process, Engine driven Hydraulic Pump is controlled boom cylinder through hydraulicdirectional control valve, swing arm is lifted to the discharging height together with scraper bowl and rocking arm, after the scraper bowl discharging, Engine driven Hydraulic Pump is controlled boom cylinder through hydraulicdirectional control valve, with swing arm, scraper bowl and rocking arm drop to work loading height together, in moved arm lifting and decline process, all need motor that power is provided, and swing arm gravitional force wastes, make loader exist oil consumption high, the large deficiency that waits of exhaust emission.
Existing loading arm potential energy recovery device adopts the way of recycling that hydraulic pressure reclaims or hydraulic-driven is generated electricity usually, and the oil back chamber that is about to boom cylinder connects a hydraulic motor, and hydraulic motor pumps into high-voltage oil liquid to hydraulic accumulator; Or hydraulic motor linked to each other with motor coaxle, when descending, swing arm makes electric power generation, reclaim the gravitional force that swing arm descends.There is complex structure in this movable arm potential energy way of recycling, energy transformation ratio is low, dynamic response is slow, weight is large, the high in cost of production shortcoming.
Summary of the invention
The purpose of this utility model is to overcome defects, provide a kind of simple in structure, energy transformation ratio is high, dynamic response is fast, lightweight, cost is low, energy density is large extension spring energy storage type loading arm potential energy reclaiming device.
For solving the problems of the technologies described above, extension spring energy storage type loading arm potential energy reclaiming device of the present utility model, comprise propons vehicle frame, swing arm, moved arm lifting limit switch, swing arm control stick, ignition switch, fuel tank, it is characterized in that it also comprises extension spring accumulator, fixed pulley, wire rope, ECU, swing arm control stick lifting gear on-off, swing arm control stick decline gear on-off, hydraulic electromagnetic change valve.
Wherein, the extension spring accumulator comprises: housing, mounting seat, extension spring hook, extension spring, terminal pad, minute pull bar, tension board, pull bar, piston rod, piston, oil cylinder, oil cylinder capping.
The mounting seat of accumulator is fixedly mounted on the propons vehicle frame, and fixed pulley is fixedly mounted on the pulley bracket of propons vehicle frame, and wire rope one end is fixedly connected with an end of pull bar, and it is hinged that the other end of wire rope is walked around the middle part of fixed pulley and swing arm.
The pull bar other end of accumulator is fixedly connected with an end face of tension board, the other end of tension board is fixedly connected with an end of piston rod, the central through hole that the other end of piston rod passes the oil cylinder capping is fixedly connected with piston, piston is packed in the oil cylinder, piston is divided into rod chamber and rodless cavity with the oil cylinder cavity, and the longitudinal axis of the longitudinal axis of the longitudinal axis of pull bar and the longitudinal axis of tension board, piston rod, the longitudinal axis of piston, oil cylinder is on the same straight line; Vertical central position of housing is provided with a cylindrical hole, and the bottom of cylindrical hole is provided with circumferential boss, by this circumferential boss oil cylinder is fixedly mounted on this cylindrical hole; Also be fixedly connected with an end of a plurality of minutes pull bars on the periphery of the other end of tension board, a plurality of minutes pull bars are arranged symmetrically with the longitudinal axis of tension board, each divides the other end of pull bar to be fixedly connected with an end face of terminal pad, each terminal pad places in the cavity of housing, be fixedly connected with many extension springs between another end face of each terminal pad and the housing base plate, one end of every extension spring is fixed on the terminal pad, and the other end of every extension spring is fixed on the housing base plate.
The bottom of oil cylinder is provided with the first oil-in, and the first oil-in is communicated to rodless cavity; The oil cylinder capping is provided with the second oil-in, and the second oil-in is communicated to rod chamber.
A control port of hydraulic electromagnetic change valve is connected to the first oil-in by fluid pressure line, and another control port of hydraulic electromagnetic change valve is connected to the second oil-in by fluid pressure line.
With fixed pulley, wire rope, the extension spring accumulator is at each side layout one cover of propons vehicle frame, and two covering devices are installed so that the longitudinal axis of propons vehicle frame is symmetrical.
The length that wire rope spurred when the maximum tension amount of extension spring accumulator dropped to extreme lower position greater than swing arm from the extreme higher position.
The input of ECU connects swing arm control stick lifting gear on-off, swing arm control stick decline gear on-off, moved arm lifting limit switch, ignition switch, and the output of ECU connects the electromagnetic coil of hydraulic electromagnetic change valve.
The operating principle of movable arm potential energy removal process is: the driver connects ignition switch, in the loader operation process, when the driver is pushed into the decline gear with the swing arm control stick, the decline gear on-off is closed, loading arm begins to descend, after ECU detects the closure signal of decline gear on-off, the electromagnetic coil energising of ECU control hydraulic electromagnetic change valve, hydraulic electromagnetic change valve energising action; Along with the decline of loading arm, the pull bar that is fixed on the wire rope pulling accumulator on the swing arm moves upward, and pull bar is by tension board pulling minute pull bar, and a minute pull bar stretches extension spring through terminal pad again; Pull bar spurs piston rod by tension board simultaneously, piston rod pulling piston rises together, the hydraulic oil of rod chamber is discharged from the second oil-in, flow back to fuel tank through hydraulic electromagnetic change valve, rodless cavity forms vacuum owing to moving on the piston, hydraulic oil passes through the first oil-in through fuel tank and hydraulic electromagnetic change valve, is inhaled into rodless cavity; When stopping swing arm and descending then hydraulic electromagnetic change valve be repositioned to fastening position, the first oil-in of rodless cavity and the second oil-in of rod chamber are all turn-offed by hydraulic electromagnetic change valve at this moment, piston is fixed motionless, piston rod, tension board, pull bar, minute pull bar, terminal pad all keep maintaining static, extension spring is maintained at extended state, and the elastic potential energy that the gravitional force that so just swing arm is fallen is converted to extension spring stores.
The operating principle of movable arm potential energy regenerative process is: in the loader operation process, when the driver is pushed into the lifting gear with the swing arm control stick, the lifting gear on-off is closed, loading arm begins lifting, after ECU detects the closure signal of lifting gear on-off, the electromagnetic coil energising of ECU control hydraulic electromagnetic change valve, hydraulic electromagnetic change valve energising action, extension spring is shunk, through terminal pad pulling minute pull bar, divide pull bar to move downward through tension board pulling pull bar, pull bar rises by wire rope pulling swing arm again; Simultaneously, tension board pulling piston rod moves downward and pushing piston moves down, the hydraulic oil of rodless cavity is discharged from the first oil-in, flow back to fuel tank through hydraulic electromagnetic change valve, rod chamber is owing to moving down of piston forms vacuum, hydraulic oil passes through the second oil-in through fuel tank and hydraulic electromagnetic change valve, is inhaled into rod chamber; The elastic potential of extension spring this moment is converted to the gravitional force of swing arm; When stopping swing arm and rising then hydraulic electromagnetic change valve be repositioned to fastening position, the first oil-in of rodless cavity and the second oil-in of rod chamber are all turn-offed by hydraulic electromagnetic change valve at this moment, piston is fixed motionless, piston rod, tension board, pull bar, minute pull bar, terminal pad all keep maintaining static, extension spring is maintained at contraction state, and so just the elastic potential energy with extension spring is converted to the gravitional force that swing arm rises.When moved arm lifting to the spacing height of lifting, the moved arm lifting limit switch is closed, the outage of ECU control electromagnetic coil, the extension spring accumulator is in the energy reserving state.
When loader strikes off operation or does not work, the swing arm control stick places meta or floating position, ECU control this moment hydraulic electromagnetic change valve can keep de-energized, and the hydraulic oil of rod chamber and rodless cavity flows no longer mutually, and the extension spring accumulator is in the energy reserving state.
The utility model compared with prior art, its advantage is:
(1) the accumulation of energy parts of extension spring energy storage type loading arm potential energy reclaiming device of the present utility model have adopted a plurality of extension springs, directly the gravitional force of swing arm is converted into the elastic potential energy of extension spring, simple in structure, energy transformation ratio is high, dynamic response is fast, lightweight, cost is low;
(2) the extension spring accumulator in the utility model, integrated oil cylinder in the extension spring accumulator can be realized storage control, release control and the retentive control of extension spring accumulator elastic potential energy, simple in structure, dependable performance by hydraulic electromagnetic change valve.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment extension spring energy storage type loading arm potential energy reclaiming device.
Fig. 2 is longitudinal profile structure and the oil cylinder oil circuit control schematic diagram of the utility model embodiment extension spring accumulator.
Fig. 3 is the top view of the utility model embodiment Fig. 2.
In figure: 1. swing arm, 2. propons vehicle frame, 3. fixed pulley, 4. steel wire rope, 6. fuel tank, 100. extension spring accumulator, 101. housing, 101a. mounting seat, 101b. housing base plate, 102. extension spring hook, 103. extension spring, 104. terminal pad, 105. minute pull bar, 106. tension board, 107. pull bar, 107a. pull bar flange, 107b. pull bar suspension ring, 108. piston rod, 109. piston, 110. oil cylinder, 110a. the first oil-in, 111. oil cylinder capping, 111a. the second oil-in, 112. rod chamber, 113. rodless cavity, 500. ECU, 501. swing arm control stick lifting gear on-off, 502. swing arm control stick decline gear on-off, 503. moved arm lifting limit switch, 504. hydraulic electromagnetic change valve, 504a. solenoid, 505. swing arm control stick, 506. ignition switch
The specific embodiment
Below in conjunction with drawings and Examples the utility model is described in detail.
Shown in Fig. 1 ~ 3, extension spring energy storage type loading arm potential energy reclaiming device of the present utility model, comprise swing arm 1, propons vehicle frame 2, fuel tank 6, swing arm control stick 505, it is characterized in that it also comprises fixed pulley 3, wire rope 4, extension spring accumulator 100, ECU 500, swing arm control stick lifting gear on-off 501, swing arm control stick decline gear on-off 502, moved arm lifting limit switch 503, hydraulic electromagnetic change valve 504, ignition switch 506.
Wherein, extension spring accumulator 100 comprises: housing 101, mounting seat 101a, extension spring hook 102, extension spring 103, terminal pad 104, minute pull bar 105, tension board 106, pull bar 107, piston rod 108, piston 109, oil cylinder 110, oil cylinder capping 111.
The mounting seat 101a of extension spring accumulator 100 is fixedly mounted on the propons vehicle frame 2, fixed pulley 3 is fixedly mounted on the pulley bracket of propons vehicle frame 2, wire rope 4 one ends are fixedly connected with an end of pull bar 107, and it is hinged with the middle part of swing arm 1 that the other end of wire rope 4 is walked around fixed pulley 3.
The other end of pull bar 107 is provided with pull bar flange 107a, the pull bar flange 107a end of pull bar 107 is fixedly connected with an end face of tension board 106, the other end of tension board 107 is fixedly connected with an end of piston rod 108, and the central through hole that the other end of piston rod 108 passes oil cylinder capping 111 is fixedly connected with piston 109; Piston 109 is packed in the oil cylinder 110, piston 109 is divided into rod chamber 112 and rodless cavity 113 with the oil cylinder cavity, and the longitudinal axis of the longitudinal axis of the longitudinal axis of pull bar 107 and tension board 106, the longitudinal axis of piston rod 108, piston 109, the longitudinal axis of oil cylinder 110 are on the same straight line; Vertical central position of housing 101 is provided with a cylindrical hole, and the bottom of cylindrical hole is provided with circumferential boss, oil cylinder 110 is fixedly mounted on this cylindrical hole of housing 101 by this circumferential boss; Also be fixedly connected with an end of six minutes pull bars 105 on the periphery of tension board 106 other ends, this six minutes pull bars 105 are arranged symmetrically with the longitudinal axis of tension board 106, each minute, the other end of pull bar 105 was fixedly connected with an end face of terminal pad 104, and each terminal pad 104 places in the cavity of housing 101; Be fixedly connected with 16 extension springs 103 between another end face of each terminal pad 104 and the housing base plate 101b, one end of every extension spring 103 is fixed on the extension spring hook 102 on the terminal pad 105, and the other end of every extension spring 103 is fixed on the extension spring hook 102 on the housing base plate 101b.
The bottom of oil cylinder 110 is provided with the first oil-in 110a, and the first oil-in 110a is communicated to rodless cavity 113; Also be provided with the second oil-in 111a in the oil cylinder capping 111, the second oil-in 111a is communicated to rod chamber 112.
The A hydraulic fluid port of hydraulic electromagnetic change valve 504 is connected to the first oil-in 110a by fluid pressure line, the B hydraulic fluid port of hydraulic electromagnetic change valve 504 is connected to the second oil-in 111a by fluid pressure line, and the P of hydraulic electromagnetic change valve 504, T hydraulic fluid port are connected to fuel tank 6 by fluid pressure line.
The input of ECU 500 connects swing arm control stick lifting gear on-off 501, swing arm control stick decline gear on-off 502, moved arm lifting limit switch 503, ignition switch 506, and the output of ECU 500 connects the electromagnetic coil 504a of hydraulic electromagnetic change valve 504.
Swing arm control stick lifting gear on-off 501, swing arm control stick decline gear on-off 502 all adopt proximity Hall switch, be installed in respectively on the fixed support of swing arm control stick 505 lift location and down position, when swing arm control stick 505 is placed in lift location, swing arm control stick lifting gear on-off 501 closures, when swing arm control stick 505 is placed in down position, swing arm control stick decline gear on-off 502 closures; Moved arm lifting limit switch 503 is fixed on the propons vehicle frame 2, when swing arm 1 is lifted to the highest spacing height, and moved arm lifting limit switch 503 closures, otherwise moved arm lifting limit switch 503 disconnects.
With fixed pulley 3, wire rope 4, extension spring accumulator 100 is at each side layout one cover of propons vehicle frame 2, and two covering devices are installed so that the longitudinal axis of propons vehicle frame 2 is symmetrical.
10%～20% of the length that wire rope 4 spurred when the maximum tension amount of extension spring accumulator 100 dropped to extreme lower position greater than swing arm 1 from the extreme higher position to prevent that extension spring from excessively being stretched, guarantees to use safety.
The driver connects ignition switch 506, in the loader operation process, when the driver is pushed into the decline gear with swing arm control stick 505, swing arm control stick decline gear on-off 502 closures, loading arm 1 begins to descend, after ECU 500 detects the closure signal of decline gear on-off 502, the electromagnetic coil 504a energising of ECU 500 control hydraulic electromagnetic change valves 504, hydraulic electromagnetic change valve 504 energising actions; Along with the decline of loading arm 1, the pull bar 107 that is fixed on the wire rope 4 pulling accumulators 100 on the swing arm 1 moves upward, and pull bar 107 is by tension board 106 pulling minute pull bars 105, and minute pull bar 105 stretches extension spring 103 through terminal pad 104 again; Pull bar 107 is by tension board 106 pulling piston rods 108 simultaneously, piston rod 108 pulling pistons 109 rise together, the hydraulic oil of rod chamber 112 is discharged from the second oil-in 111a, flow back to fuel tank 6 through hydraulic electromagnetic change valve 504, rodless cavity 113 forms vacuum owing to moving on the piston 109, hydraulic oil passes through the first oil-in 110a through fuel tank 6 and hydraulic electromagnetic change valve 504, is inhaled into rodless cavity 113; When stopping swing arm 1 and descending then hydraulic electromagnetic change valve 504 be repositioned to fastening position, the first oil-in 110a of rodless cavity 113 and the second oil-in 111a of rod chamber 112 are all turn-offed by hydraulic electromagnetic change valve 504 at this moment, piston 109 is fixed motionless, piston rod 108, tension board 106, pull bar 107, minute pull bar 105, terminal pad 104 all keep maintaining static, extension spring 103 is maintained at extended state, and the elastic potential energy that the gravitional force that so just swing arm 1 is fallen is converted to extension spring 103 stores.
In the loader operation process, when the driver is pushed into the lifting gear with swing arm control stick 505, swing arm control stick lifting gear on-off 501 closures, loading arm 1 beginning lifting, after ECU 500 detects the closure signal of swing arm control stick lifting gear on-off 501, the electromagnetic coil 504a energising of ECU 500 control hydraulic electromagnetic change valves 504, hydraulic electromagnetic change valve 504 energising actions, extension spring 103 is shunk, through terminal pad 104 pulling minute pull bars 105, divide pull bar 105 to move downward through tension board 106 pulling pull bars 107, pull bar 107 rises by wire rope 4 pulling swing arms 1 again; Simultaneously, tension board 106 pulling piston rods 108 move downward and pushing piston 109 moves down, the hydraulic oil of rodless cavity 113 is discharged from the first oil-in 110a, flow back to fuel tank 6 through hydraulic electromagnetic change valve 504, rod chamber 112 is owing to moving down of piston 109 forms vacuum, hydraulic oil passes through the second oil-in 111a through fuel tank 6 and hydraulic electromagnetic change valve 504, is inhaled into rod chamber 112; The elastic potential of extension spring 103 this moment is converted to the gravitional force of swing arm 1; When stopping swing arm 1 and rising then hydraulic electromagnetic change valve 504 be repositioned to fastening position, the first oil-in 110a of rodless cavity 113 and the second oil-in 111a of rod chamber 112 are all turn-offed by hydraulic electromagnetic change valve 504 at this moment, piston 109 is fixed motionless, piston rod 108, tension board 106, pull bar 107, minute pull bar 105, terminal pad 104 all keep maintaining static, extension spring 103 is maintained at contraction state, and so just the elastic potential energy with extension spring 103 is converted to the gravitional force that swing arm 1 rises.When swing arm 1 is lifted to the spacing height of lifting, moved arm lifting limit switch 503 closures, ECU 500 control electromagnetic coil 504a outages, extension spring accumulator 100 is in the energy reserving state.
When loader strikes off operation or does not work, swing arm control stick 505 places meta or floating position, this moment, ECU 500 control hydraulic electromagnetic change valves 504 can keep de-energized, the hydraulic oil of rod chamber 112 and rodless cavity 113 flows no longer mutually, and extension spring accumulator 100 is in the energy reserving state.
The above has done detailed description to embodiment of the present utility model by reference to the accompanying drawings, but the utility model is not limited to above-mentioned embodiment, in the ken that affiliated technical field those of ordinary skill possesses, can also under the prerequisite that does not break away from the utility model aim, make various variations.
Claims (3)
1. extension spring energy storage type loading arm potential energy reclaiming device, it comprises propons vehicle frame (2), swing arm (1), moved arm lifting limit switch (503), swing arm control stick (505), ignition switch (506), it is characterized in that:
It also comprises extension spring accumulator (100), fixed pulley (3), wire rope (4), ECU (500), swing arm control stick lifting gear on-off (501), swing arm control stick decline gear on-off (502), hydraulic electromagnetic change valve (504);
The mounting seat (101a) of described extension spring accumulator (100) is fixedly mounted on the propons vehicle frame (2), fixed pulley (3) is fixedly mounted on the pulley bracket of propons vehicle frame (2), wire rope (4) one ends are fixedly connected with an end of pull bar (107), and it is hinged with the middle part of swing arm (1) that the other end of wire rope (4) is walked around fixed pulley (3); The other end of pull bar (107) is fixedly connected with an end face of tension board (106), the other end of tension board (106) is fixedly connected with an end of piston rod (108), and the central through hole that the other end of piston rod (108) passes oil cylinder capping (111) is fixedly connected with piston (109); Piston (109) is packed in the oil cylinder (110), piston (109) is divided into rod chamber (112) and rodless cavity (113) with the oil cylinder cavity, and the longitudinal axis of the longitudinal axis of the longitudinal axis of pull bar (107) and tension board (106), the longitudinal axis of piston rod (108), piston (109), the longitudinal axis of oil cylinder (110) are on the same straight line; Vertical central position of housing (101) is provided with a cylindrical hole, and the bottom of cylindrical hole is provided with circumferential boss, oil cylinder (110) is fixedly mounted on this cylindrical hole of housing (101) by this circumferential boss; On the periphery of tension board (106) other end with a plurality of minutes pull bar (105) an end be fixedly connected with, a plurality of minutes pull bar (105) be arranged symmetrically with the longitudinal axis of tension board (106), each minute, the other end of pull bar (105) was fixedly connected with an end face of terminal pad (104), and each terminal pad (104) places in the cavity of housing (101); Be fixedly connected with many extension springs (103) between another end face of each terminal pad (104) and the housing base plate (101b), one end of every extension spring (103) is fixed on the terminal pad (104), and the other end of every extension spring (103) is fixed on the housing base plate (101b);
The bottom of described oil cylinder (110) also is provided with the first oil-in (110a), and the first oil-in (110a) is communicated to rodless cavity (113); Also be provided with the second oil-in (111a) in the oil cylinder capping (111), the second oil-in (111a) is communicated to rod chamber (112);
A control port of described hydraulic electromagnetic change valve (504) is connected to the first oil-in (110a) by fluid pressure line, and another control port of hydraulic electromagnetic change valve (504) is connected to the second oil-in (111a) by fluid pressure line;
The input of described ECU (500) connects swing arm control stick lifting gear on-off (501), swing arm control stick decline gear on-off (502), moved arm lifting limit switch (503), ignition switch (506), and the output of ECU (500) connects the electromagnetic coil (504a) of hydraulic electromagnetic change valve (504).
2. extension spring energy storage type loading arm potential energy reclaiming device as claimed in claim 1, it is characterized in that: described extension spring accumulator (100), fixed pulley (3), wire rope (4), at each side layout one cover of propons vehicle frame (2), and two covering devices are installed so that the longitudinal axis of propons vehicle frame (2) is symmetrical.
3. extension spring energy storage type loading arm potential energy reclaiming device as claimed in claim 1 is characterized in that: the length that wire rope (4) spurred when the maximum tension amount of described extension spring accumulator (100) dropped to extreme lower position greater than swing arm (1) from the extreme higher position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320242231 CN203238683U (en) | 2013-05-07 | 2013-05-07 | Tension spring energy storage device type loading machine movable arm potential energy recovery regenerative device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320242231 CN203238683U (en) | 2013-05-07 | 2013-05-07 | Tension spring energy storage device type loading machine movable arm potential energy recovery regenerative device |
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| Publication Number | Publication Date |
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| CN203238683U true CN203238683U (en) | 2013-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320242231 Withdrawn - After Issue CN203238683U (en) | 2013-05-07 | 2013-05-07 | Tension spring energy storage device type loading machine movable arm potential energy recovery regenerative device |
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| CN (1) | CN203238683U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103215978A (en) * | 2013-05-07 | 2013-07-24 | 山东理工大学 | Tension spring energy accumulator type loader swing arm potential energy recycling and regenerating device |
-
2013
- 2013-05-07 CN CN 201320242231 patent/CN203238683U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103215978A (en) * | 2013-05-07 | 2013-07-24 | 山东理工大学 | Tension spring energy accumulator type loader swing arm potential energy recycling and regenerating device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131016 Effective date of abandoning: 20141210 |
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| RGAV | Abandon patent right to avoid regrant |