CN102493913A - Shell turn type inner-curve radial plunger hydraulic motor - Google Patents
Shell turn type inner-curve radial plunger hydraulic motor Download PDFInfo
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- CN102493913A CN102493913A CN2011104129111A CN201110412911A CN102493913A CN 102493913 A CN102493913 A CN 102493913A CN 2011104129111 A CN2011104129111 A CN 2011104129111A CN 201110412911 A CN201110412911 A CN 201110412911A CN 102493913 A CN102493913 A CN 102493913A
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- 230000003068 static effect Effects 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 6
- 230000000670 limiting effect Effects 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 210000001991 scapula Anatomy 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 63
- 230000005540 biological transmission Effects 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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Abstract
The invention relates to a shell turn type inner-curve radial plunger hydraulic motor, which comprises a machine casing composed of a front cover, a stator and a rear cover. The machine casing is provided with an oil through shaft, a rotor and an oil distribution disc. The shell turn type inner-curve radial plunger hydraulic motor is characterized in that the oil distribution disc is sleeved on the oil through shaft and fixed with an inner scapula of the rear cover, a fixed brake seat is fixed on the periphery of the oil through shaft, the machine casing can rotate around the axis relative to the oil through shaft, and a plurality of dynamic friction sheets and a plurality of static friction sheets which are arranged at mutual intervals and in an overlaying mode are sleeved on the periphery of the fixed brake seat. A plunger is further arranged in the rear cover and sleeved on the fixed brake seat and can glide in the axial direction, a spring enabling the plunger to keep the mutual tight compression between the dynamic friction sheets and the static friction sheets is further arranged in the rear cover, a sealed oil cavity is formed between the plunger and fixed brake seat, and the fixed brake seat is provided with an oil hole communicated with the oil. The shell turn type inner-curve radial plunger hydraulic motor is provided with a brake structure organically combined with the hydraulic motor, thereby being compact and reasonable in structure.
Description
Technical field
The present invention relates to a kind of shell-rotating type inner curve radial plunger type motor.
Background technique
Mostly inner curve formula radial plunger type motor is pivoting, i.e. cylinder body relative fixed, the relative cylinder body rotation of transmission shaft and output torque and rotating speed; Its structure comprises the cylinder body that cover plate, bonnet, stator and protecgulum form, and protecgulum and bonnet are fixed on the rear and front end of stator, and transmission shaft and pintle are installed in the cavity of cylinder body; The front portion of transmission shaft is bearing on the protecgulum through two rolling bearings that front and back are provided with at interval, and pintle is installed in the bonnet, and the front end of transmission shaft stretches out protecgulum outward and outwards exports torque and rotating speed; Also be equipped with rotor on the transmission shaft; Connect realization rotation synchronously through spline between transmission shaft and the rotor, the rotor flank upper edge circle spacing is furnished with a plurality of plunger holes that radially are provided with, and plunger and roller are installed in each plunger hole; The inner circle wall of roller and stator is conflicted; The inner circle wall of stator is wavy, and the end face of rotor is provided with the passage of a plurality of connection pintles, and the number of passage is identical with the number of plunger hole.
This inner curve formula radial piston hydraulic motor working principle is following: the oil-feed process when the bottom of the plunger of pressure oil in the oil inlet passage of oil distributing shaft, epitrochanterian passage get into plunger hole, is pushed at the effect lower plunger of pressure oil; Move to the stator direction along plunger hole, plunger passes to roller with power, and the conflict inner peripheral surface upper recess of stator of roller produces tangential force; Stator produces torque to the reaction force of plunger to rotor; The oil return process, when rotor rotation when making roller be positioned at the low spot of stator inner peripheral surface recess, the sealing of the oil inlet passage of epitrochanterian passage and pintle; When roller is crossed the recess low spot when the protuberance direction is rolled; The oil discharge passage of oil distributing shaft communicates with plunger hole through epitrochanterian passage, and the camming surface of stator inner circle wall pushes back plunger, and the internal volume of plunger hole dwindles and the oil discharge passage that pressure oil advances epitrochanterian passage and oil distributing shaft is discharged; So constantly at interval circulation finally drives the transmission shaft rotation and outwards exports torque and rotating speed.
Like an application number is a kind of pivoting inner curve radial plunger type motor the Chinese invention patent " inner curve multiaction radial plunger type motor " of ZL201010197277.X (publication number is CN101858300A) has disclosed.
The shell-rotating type hydraulic motor with inner curved piston is also arranged on the market; It is the central shaft relative fixed; The rotation of the relative central shaft of cylinder body is a kind of shell-rotating type hydraulic motor with inner curved piston the Chinese utility model patent " shell-rotating type hydraulic motor with inner curved piston " of ZL03226808.4 (notification number is CN2619064Y) has disclosed like a patent No..
The working principle of pivoting inner curve radial plunger type motor and shell-rotating type inner curve radial plunger type motor is similar basically, and pluses and minuses are respectively arranged.But existing no matter which kind of all is not provided with brake portion; As this inner curve radial plunger type motor is applied in the machinery; Also need the additional configuration brake structure, break and inner curve radial plunger type motor separate and use and install, and cost is high, fitting operation is inconvenient.
Summary of the invention
Technical problem to be solved by this invention is to above-mentioned existing technology present situation a kind of shell-rotating type inner curve radial plunger type motor that is provided with brake structure to be provided, and this brake structure and oil hydraulic motor organically combine, compactness rational in infrastructure.
The present invention solves the problems of the technologies described above the technological scheme that is adopted: a kind of shell-rotating type inner curve radial plunger type motor, comprise the casing of forming by protecgulum, stator and bonnet, and protecgulum and bonnet are fixed on the rear and front end of stator; Casing is equipped with logical oil axle, rotor and oil distribution casing; Said rotor is fixed on to be thrown on the oil axle, and the rotor flank upper edge circle spacing is furnished with a plurality of plunger holes that radially are provided with, and plunger and roller are installed in each plunger hole; The inner circle wall of roller and stator is conflicted; Rotor is provided with the passage that the runner on the number a plurality of and oil distribution casing identical with plunger hole is communicated with, and it is characterized in that: said oil distribution casing is set on the logical oil axle, and the interior omoplate of oil distribution casing and bonnet is fixed together simultaneously; Be processed with on the said logical oil axle with oil distribution casing on runner the oil-feed runner and the fuel-displaced runner that communicate; The periphery at logical oil axle rear portion is fixed with decides Brake Block, and said casing can lead to oil axle and rotor relatively around self axis rotation, and said periphery of deciding Brake Block is arranged with each interval superpose the multi-disc movable friction plate and the static friction sheet of setting; Movable friction plate is circumferentially spacing in the endoporus of bonnet; The static friction sheet is circumferentially spacing is deciding the periphery of Brake Block, also is provided with piston in the said bonnet, and this piston sleeve is located to be decided on the Brake Block and the ability axial slip; Said movable friction plate and static friction sheet are between the interior omoplate and piston of bonnet; Also be provided with in the said bonnet and make piston keep the spring that movable friction plate and static friction sheet are compressed each other, said piston with decide the oil pocket that formation is sealed between the Brake Block, decide to be processed with on the Brake Block oilhole that communicates with said oil pocket.
Owing to will become greatly decide between Brake Block and the bonnet endoporus to install the radial dimension that friction plate certainly will make casing; The side face position and the spacing between the casing endoporus of logical oil axle are big, as will directly being installed in the protecgulum through fore bearing leading to the oil axle, then need very big bearing; For making overall structure more reasonable; Above-mentionedly decide Brake Block and be installed in the bonnet through rear bearing, said rotor has the ring-type assembly department that extends forward, and this ring-type assembly department is installed in the protecgulum through fore bearing.The spacing size is relatively reasonable between the side face of the ring-type assembly department of rotor and the inner hole wall of protecgulum, so rotor can be through adopting the fair-sized bearings in protecgulum.
The endoporus of above-mentioned rotor is connected on the logical oil axle through spline, and the front end of said logical oil axle is provided with the locking nut that rotor axial is spacing.
Between above-mentioned protecgulum, stator and the bonnet through many screw together.
Be provided with the hole in the above-mentioned bonnet and use back-up ring, said spring is supported on the hole with between back-up ring and the piston.Play a supporting role to spring with back-up ring in the hole, for the installation of spring provides rational position, the hole is equivalent to the effect of spring seat with back-up ring.
Be provided with baffle ring between the macropore portion of the shoulder hole of the above-mentioned outer circumferential face of deciding Brake Block and piston; This baffle ring axial limiting is being decided on the Brake Block; The endoporus of baffle ring and cylindrical are respectively and decide to form liquid sealing between the macropore portion of shoulder hole of Brake Block periphery and piston; The macropore portion of the shoulder hole of said piston and decide to form liquid sealing between the outer circumferential face of Brake Block, decides to form said oil pocket between the macropore portion of shoulder hole of Brake Block and piston said baffle ring.
The front end activity of above-mentioned logical oil axle passes protecgulum, and is provided with oil seal between the endoporus of the outer circumferential face of logical oil axle and protecgulum.The rear and front end of logical like this oil axle all can be supported, and this oil hydraulic motor is particularly suitable on the winch.
Above-mentioned logical oil axle has the central through bore that axially runs through its axle center.The installation shaft of winch can wear and be fixed on the central through bore, is convenient on the installation winch with this oil hydraulic motor, in addition; Can be at central through bore ventilate body or liquid; Use under particular surroundings with convenient, when this motor is used for the pick of rig brill, can discharge underground water fast through this central through bore; When this motor is used for rig and in the end breaker is installed carrying out broken road surface, can feed gas through this central through bore.
Compared with prior art; The invention has the advantages that: have additional brake portion in this shell-rotating type inner curve radial plunger type motor, under out-of-work state, piston is pressed together the bonnet of each movable friction plate and static friction sheet and casing under spring action; Stop the logical relatively oil axle of casing around self axis rotation; Realize braking, a kind of shell-rotating type inner curve radial plunger type motor with braking function is provided, use the apparatus of this motor to need not the extra brake structure of setting up; And this brake structure is reasonable in design, supplies the installing space of each friction plate big, and the quantity that can increase friction plate increases braking torque; Braking is reliable; Because braking torque increases, for increasing input power condition is provided, thereby has realized bigger casing output torque.
Description of drawings
Fig. 1 is the structure sectional view of first embodiment of the invention;
Fig. 2 is the structure sectional view of second embodiment of the invention.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, be first embodiment of the present invention.
A kind of shell-rotating type inner curve radial plunger type motor comprises the casing that is assemblied by protecgulum 1, stator 2 and bonnet 3, and protecgulum 1 and bonnet 3 are fixed on the rear and front end of stator 2, are fixed together through many screws 18 between protecgulum 1, stator 2 and the bonnet 3.
Casing is equipped with and leads to oil axle 4, rotor 5 and oil distribution casing 6, and rotor 5 is fixed on logical oily 4, and the endoporus of rotor 5 is connected on the logical oil axle 4 through spline, and the front end that leads to oily axle 4 is provided with the locking nut 17 with rotor 5 axial limitings.The 5 side face upper edge circle spacings of rotor are furnished with a plurality of plunger holes 51 that radially are provided with; Plunger 7 and roller 8 are installed in each plunger hole 51; Roller 8 is conflicted with the inner circle wall of stator 2, and rotor 5 is provided with the passage 52 that the runner 61 on the identical a plurality of and oil distribution casing of number and plunger hole 51 is communicated with.
Be processed with on the logical oil axle 4 with oil distribution casing 6 on runner 61 the oil-feed runner 41 and fuel-displaced runner 42 that communicate; Oil distribution casing 6 be set on the logical oil axle 4 and and logical oil axle 4 between form liquid sealing; Oil distribution casing 6 is fixed together with the interior omoplate 31 of bonnet simultaneously; The periphery at logical oil axle 4 rear portions is fixed with decides Brake Block 9, logical oil axle 4 and decide to pass through screw together between the Brake Block 9.
Decide Brake Block 9 and be installed in the bonnet 3 through rear bearing 15, rotor 5 has forward the ring-type assembly department 53 that extends, and this ring-type assembly department 53 is installed in the protecgulum 1 through fore bearing 16, and casing just can lead to oil axle 4 and rotor 5 relatively and rotate around self axis like this.
The periphery of deciding Brake Block 9 is arranged with the multi-disc movable friction plate 10 and static friction sheet 11 that the each interval stack is provided with; Movable friction plate 10 is circumferentially spacing in the endoporus of bonnet 3; Static friction sheet 11 is circumferentially spacing in the periphery of deciding Brake Block 9, also is provided with piston 12 in the bonnet 3, and piston 12 is set in to be decided on the Brake Block 11 and the ability axial slip; Piston 12 and decide to form liquid sealing between the Brake Block 11; Movable friction plate 11 and static friction sheet 12 also are provided with the spring 13 that makes piston 12 keep trend that movable friction plate 11 and static friction sheet 12 are compressed each other in the bonnet 3 between the interior omoplate 31 and piston 12 of bonnet, be provided with the hole in the bonnet 3 with back-up ring 19; Spring 13 is supported on the hole with between back-up ring 19 and the piston 12, and the spring 13 in the present embodiment is a butterfly spring.
Piston 12 and decide between the Brake Block 11 to form the oil pocket 14 of sealing decides to be processed with on the Brake Block 9 oilhole 91 that communicates with oil pocket 14.Decide to be provided with baffle ring 20 between the macropore portion of shoulder hole of outer circumferential face and piston 12 of Brake Block 9; These baffle ring 20 axial limitings are being decided on the Brake Block 9; The endoporus of baffle ring 20 and cylindrical are respectively and decide to form liquid sealing between the macropore portion of shoulder hole of Brake Block 9 peripheries and piston 12; The macropore portion of the shoulder hole of piston 12 and decide to form liquid sealing between the outer circumferential face of Brake Block 9, decides to form aforementioned oil pocket 14 between the macropore portion of shoulder hole of Brake Block 9 and piston 12 baffle ring 20.
The working principle of this shell-rotating type inner curve radial plunger type motor and process and the multiple-action inner curved radial plunger type motor of pivoting are basic identical, no longer set forth at this.
Braking process: piston 12 is pressed together each movable friction plate 10 under spring 13 effects with static friction sheet 11, stops the logical relatively oil axle 4 of casing around self axis rotation, realizes braking; During releasing, hydraulic oil gets into oil pocket 14 through oilhole 91, and with piston 12 pushers, each friction plate loses pressure, and loosening between multi-disc movable friction plate 10 and the static friction sheet 11, casing can rotate freely.
This brake structure is reasonable in design, supplies the installing space of each friction plate big, and the quantity that can increase friction plate increases braking torque, and braking is reliable, because braking torque increases, for increasing input power condition is provided, thereby has realized bigger casing output torque.
As shown in Figure 2, be second embodiment of the present invention,
Present embodiment and first embodiment's difference is: the front end activity of logical oil axle 4 passes protecgulum 1; The rear and front end of logical like this oil axle 4 all can be supported; This oil hydraulic motor is particularly suitable on the winch, and is provided with oil seal 43 between the endoporus of the outer circumferential face of logical oil axle 4 and protecgulum 1.
Claims (8)
1. shell-rotating type inner curve radial plunger type motor; Comprise the casing of forming by protecgulum (1), stator (2) and bonnet (3); Protecgulum (1) and bonnet (3) are fixed on the rear and front end of stator (2), and casing is equipped with logical oil axle (4), rotor (5) and oil distribution casing (6), and said rotor (5) is fixed on the logical oil axle (4); Rotor (5) the side face upper edge circle spacing is furnished with a plurality of plunger holes (51) that radially are provided with; Plunger (7) and roller (8) are installed in each plunger hole (51), and roller (8) is conflicted with the inner circle wall of stator (2), and rotor (5) is provided with the passage (52) that the runner (61) on the number a plurality of and oil distribution casing identical with plunger hole (51) is communicated with; It is characterized in that: said oil distribution casing (6) is set on the logical oil axle (4); Simultaneously oil distribution casing (6) is fixed together with the interior omoplate (31) of bonnet, be processed with on the said logical oil axle (4) with oil distribution casing (6) on runner (61) the oil-feed runner (41) and the fuel-displaced runner (42) that communicate, the periphery at logical oily (4) rear portion is fixed with decides Brake Block (9); Casing can lead to oil axle (4) and rotor (5) relatively and rotate around self axis; Said periphery of deciding Brake Block (9) is arranged with multi-disc movable friction plate (10) and the static friction sheet (11) that the each interval stack is provided with, and movable friction plate (10) is circumferentially spacing in the endoporus of bonnet (3), and static friction sheet (11) is circumferentially spacing in the periphery of deciding Brake Block (9); Also be provided with piston (12) in the said bonnet (3); This piston (12) is set in decides that Brake Block (11) is gone up and can axial slip, and said movable friction plate (11) and static friction sheet (12) are positioned between the omoplate (31) and piston (12) of bonnet, also is provided with the spring (13) that piston (12) maintenance is compressed movable friction plate (11) and static friction sheet (12) each other in the said bonnet (3); Said piston (12) and decide between the Brake Block (11) to form the oil pocket (14) of sealing decides to be processed with on the Brake Block (9) oilhole (91) that communicates with said oil pocket (14).
2. shell-rotating type inner curve radial plunger type motor according to claim 1; It is characterized in that: saidly decide Brake Block (9) and be installed in the bonnet (3) through rear bearing (15); Said rotor (5) has the ring-type assembly department (53) that extends forward, and this ring-type assembly department (53) is installed in the protecgulum (1) through fore bearing (16).
3. shell-rotating type inner curve radial plunger type motor according to claim 1; It is characterized in that: the endoporus of said rotor (5) is connected on the logical oil axle (4) through spline, and the front end of said logical oil axle (4) is provided with the locking nut (17) with rotor (5) axial limiting.
4. shell-rotating type inner curve radial plunger type motor according to claim 1 is characterized in that: be fixed together through many screws (18) between said protecgulum (1), stator (2) and the bonnet (3).
5. shell-rotating type inner curve radial plunger type motor according to claim 1 is characterized in that: be provided with the hole in the said bonnet (3) with back-up ring (19), said spring (13) is supported on the hole with between back-up ring (19) and the piston (12).
6. shell-rotating type inner curve radial plunger type motor according to claim 1; It is characterized in that: be provided with baffle ring (20) between the macropore portion of the shoulder hole of the said outer circumferential face of deciding Brake Block (9) and piston (12); This baffle ring (20) axial limiting is being decided on the Brake Block (9); The endoporus of baffle ring (20) and cylindrical are respectively and decide to form liquid sealing between the macropore portion of shoulder hole of Brake Block (9) periphery and piston (12); The macropore portion of the shoulder hole of said piston (12) and decide to form liquid sealing between the outer circumferential face of Brake Block (9), decides to form said oil pocket (14) between the macropore portion of shoulder hole of Brake Block (9) and piston (12) said baffle ring (20).
7. according to the described shell-rotating type inner curve of arbitrary claim radial plunger type motor in the claim 1～6; It is characterized in that: the front end activity of said logical oil axle (4) passes protecgulum (1), and is provided with oil seal (43) between the endoporus of the outer circumferential face of logical oil axle (4) and protecgulum (1).
8. shell-rotating type inner curve radial plunger type motor according to claim 7 is characterized in that: said logical oil axle (4) has the central through bore (44) that axially runs through its axle center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110412911.1A CN102493913B (en) | 2011-12-13 | 2011-12-13 | Shell turn type inner-curve radial plunger hydraulic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110412911.1A CN102493913B (en) | 2011-12-13 | 2011-12-13 | Shell turn type inner-curve radial plunger hydraulic motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102493913A true CN102493913A (en) | 2012-06-13 |
| CN102493913B CN102493913B (en) | 2015-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110412911.1A Active CN102493913B (en) | 2011-12-13 | 2011-12-13 | Shell turn type inner-curve radial plunger hydraulic motor |
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| Country | Link |
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| CN (1) | CN102493913B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216552A (en) * | 2013-05-06 | 2013-07-24 | 张庆冬 | Brake device |
| CN103434392A (en) * | 2013-06-26 | 2013-12-11 | 贵州大学 | Novel hydraulic automobile wheel |
| CN106495039A (en) * | 2016-12-26 | 2017-03-15 | 广东工业大学 | A kind of hydraulic wireline winch driving means |
| CN106988958A (en) * | 2017-04-05 | 2017-07-28 | 温州职业技术学院 | Low-speed big axial-piston hydraulic motor |
| WO2018090159A1 (en) * | 2016-11-18 | 2018-05-24 | 秦皇岛正时乐液压设备有限公司 | Internally curved low-speed high-torque hydraulic motor with torque being output by means of rotation of housing |
| CN107806391B (en) * | 2017-11-08 | 2023-10-31 | 南昌大学 | Radial hydraulic plunger motor |
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| GB2086991A (en) * | 1980-08-26 | 1982-05-19 | Staffa Products Ltd | Improvements in and relating to hydraulic motors |
| US5697765A (en) * | 1993-04-13 | 1997-12-16 | Sauer Inc. | Hydraulic motor |
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| US20040194619A1 (en) * | 2003-04-01 | 2004-10-07 | Sampo-Hydraulics Oy | Radial piston hydraulic motor and method in the control of a radial piston hydraulic motor |
| CN101709685A (en) * | 2009-11-11 | 2010-05-19 | 宜昌市燕狮科技开发有限责任公司 | Radial plunger type multiple-action inner curved hydraulic motor |
| CN202326004U (en) * | 2011-12-13 | 2012-07-11 | 宁波德辰液压科技有限公司 | Shell rotary inner curve radial plunger hydraulic motor |
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2011
- 2011-12-13 CN CN201110412911.1A patent/CN102493913B/en active Active
Patent Citations (7)
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| GB2086991A (en) * | 1980-08-26 | 1982-05-19 | Staffa Products Ltd | Improvements in and relating to hydraulic motors |
| US5697765A (en) * | 1993-04-13 | 1997-12-16 | Sauer Inc. | Hydraulic motor |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216552A (en) * | 2013-05-06 | 2013-07-24 | 张庆冬 | Brake device |
| CN103216552B (en) * | 2013-05-06 | 2015-06-10 | 张庆冬 | Brake device |
| CN103434392A (en) * | 2013-06-26 | 2013-12-11 | 贵州大学 | Novel hydraulic automobile wheel |
| WO2018090159A1 (en) * | 2016-11-18 | 2018-05-24 | 秦皇岛正时乐液压设备有限公司 | Internally curved low-speed high-torque hydraulic motor with torque being output by means of rotation of housing |
| CN106495039A (en) * | 2016-12-26 | 2017-03-15 | 广东工业大学 | A kind of hydraulic wireline winch driving means |
| CN106495039B (en) * | 2016-12-26 | 2019-09-24 | 广东工业大学 | A kind of hydraulic wireline winch driving device |
| CN106988958A (en) * | 2017-04-05 | 2017-07-28 | 温州职业技术学院 | Low-speed big axial-piston hydraulic motor |
| CN106988958B (en) * | 2017-04-05 | 2018-09-18 | 温州职业技术学院 | Low-speed big axial-piston hydraulic motor |
| CN107806391B (en) * | 2017-11-08 | 2023-10-31 | 南昌大学 | Radial hydraulic plunger motor |
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| Publication number | Publication date |
|---|---|
| CN102493913B (en) | 2015-05-13 |
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Owner name: NINGBO DECHEN HYDRAULIC TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ZHOU WEI Effective date: 20150116 |
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Effective date of registration: 20150116 Address after: 315800, No. 503, West Road, A2 Science Park, Beilun District, Zhejiang, Ningbo Applicant after: Ningbo Dechen Hydraulic Technology Co., Ltd. Address before: 315000, Beilun, Zhejiang province Ningbo science and Technology Park, A2 West 503 West Road, Ningbo Hydraulic Technology Co., Ltd. Applicant before: Zhou Wei |
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