CN106884767B - Novel inclined tray axial plunger pump - Google Patents
Novel inclined tray axial plunger pump Download PDFInfo
- Publication number
- CN106884767B CN106884767B CN201710235097.8A CN201710235097A CN106884767B CN 106884767 B CN106884767 B CN 106884767B CN 201710235097 A CN201710235097 A CN 201710235097A CN 106884767 B CN106884767 B CN 106884767B
- Authority
- CN
- China
- Prior art keywords
- plunger
- hole
- pump housing
- pitch
- platen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/22—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
- F04B1/124—Pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
- F04B1/124—Pistons
- F04B1/126—Piston shoe retaining means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/2014—Details or component parts
- F04B1/2064—Housings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/2014—Details or component parts
- F04B1/2078—Swash plates
- F04B1/2085—Bearings for swash plates or driving axles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
A kind of novel inclined tray axial plunger pump is provided, including the preceding pump housing, the intermediate pump housing, cylinder body, the pump housing and transmission shaft afterwards, installation inclined hole is formed with after described in the pump housing and the pitch and the rear pump housing being set to inside installation inclined hole are rotatablely connected, it is butted in the middle part of platen after steel ball and platen cooperation in the steel ball and spring holder assembly in transmission shaft other end spline, it is formed on the cylinder body end face on multiple equally distributed plunger holes and platen and is formed with through-hole corresponding with plunger hole hole location, plunger assembly one end is inserted into plunger hole after passing through through-hole and is slidably matched with plunger hole, it is butted in inclination side surface after through-hole cooperation on the plunger assembly other end and platen.Traditional fixed pitch is changed to rotary pitch by the present invention, pitch is set to follow plunger rotation, reduce the frictional force of pitch and plunger, improve mechanical efficiency, meet the belief system requirement of hydraulic pump, plunger and piston shoes are designed as plunger assembly simultaneously, reduce the assembly difficulty of each section.
Description
Technical field
The invention belongs to railway switch machine hydraulic system pump technical fields, and in particular to a kind of novel inclined tray is axial
Plunger pump.
Background technique
With the rapid development of railway technology, the separation of track turnout is become controlling automatically from original manual control
System, this just requires Hydraulic Switch Machine system not only to have very high reliability requirement when automatically controlling, but also is breaking down
When, system can manual switching at the low rotational speed, and the reliability of original hydraulic pump is not able to satisfy system requirements.Patent of invention Shen
It numbers 201120206690.8 please disclose a kind of " plunger pump " (calling file 1 in the following text), the fixed peace of the swash plate of hemisphere face structure in file 1
Loaded on rear pump body, when main shaft drives plunger to do flexible move back and forth in the cylinder holes of cylinder body, plunger is that sliding rubs with swash plate
It wipes, frictional resistance is big, meanwhile, the installation form of plunger is clad type structure, and installation difficulty is larger；Application number of invention patent
201220064342.6 disclose a kind of " novel axial plunger pump " (calling file 2 in the following text), and swash plate is fixedly installed in rear cover in file 2
In inner cavity, plunger end face is butted on always on the disc end face being cooperatively connected with swash plate, and main shaft makes plunger exist after driving plunger rotation
When doing flexible move back and forth in plunger hole, under plunger spring effect, plunger end face is butted on always on disc end face, and plunger is turning
It with disc is sliding friction during dynamic, meanwhile, plunger spring connect in plunger hole and with plunger is vulnerable part, is replaced
Difficulty is big, and the failure rate of plunger pump is big, in summary, it is necessary to improve.
Summary of the invention
Present invention solves the technical problem that: a kind of novel inclined tray axial plunger pump is provided, fixed is inclined traditional
Swash plate is changed to rotary pitch, and pitch is made to follow plunger rotation, substantially reduces the frictional force of pitch and plunger, improves
Mechanical efficiency meets the belief system requirement of hydraulic pump, while plunger and piston shoes is designed as plunger assembly, structure letter
It is single, greatly reduce the assembly difficulty of each section.
The technical solution adopted by the present invention: novel inclined tray axial plunger pump, including the preceding pump housing, the intermediate pump housing, cylinder body,
The pump housing and transmission shaft afterwards, the preceding pump housing are installed on transmission shaft one end by bearing, and the cylinder body is set in the transmission shaft other end
And connect with the spline fitted of the transmission shaft other end, steel loop and cylinder body excircle are interference fitted, and the intermediate pump housing passes through needle roller
Bearing I and steel loop excircle are cooperatively connected, described intermediate pump housing one end and the preceding pump housing be fixedly connected and the intermediate pump housing other end and
The rear pump housing positioned at the transmission shaft other end is fixedly connected, and is formed with installation inclined hole in the rear pump housing and is set to inside installation inclined hole
Pitch and the rear pump housing are rotatablely connected, and platen are equipped between the pitch and cylinder body, in transmission shaft other end spline
It is butted in the middle part of platen after steel ball and platen cooperation in steel ball and spring holder assembly, is formed with multiple be uniformly distributed on the cylinder body end face
Plunger hole and platen on be formed with through-hole corresponding with plunger hole hole location, plunger assembly one end is inserted into plunger hole after passing through through-hole
And be slidably matched with plunger hole, it is butted in inclination side surface and leads to after the plunger assembly other end and the through-hole cooperation on platen
Crossing after transmission shaft drives plunger rotation makes pitch follow plunger rotation.
Wherein, the installation inclined hole is stepped hole and installation inclined hole is provided with needle bearing II and ball bearing, described to incline
It is installed on the rear pump housing after swash plate and needle bearing II and ball bearing interference fit.
Further, the plunger assembly includes plunger and piston shoes, and installation rank hole, the installation are formed with inside the piston shoes
Rank hole right end is equipped with locking nut and one end is formed with after screwing in externally threaded plunger insertion installation rank hole with locking nut cooperation
Plunger is fixedly installed on piston shoes, plunger other end end is butted on the limited cap on pitch and being set to the plunger other end
Lower end is inserted into through-hole, and the piston shoes are passed through in through-hole insertion plunger hole and are slidably matched with plunger hole.
Further, V-shaped groove is formed in the middle part of the platen right side and V-shaped groove bottom surface is formed with hemisphere compatible with steel ball
Slot, the steel ball are pushed against pitch by steel ball and spring holder assembly promotion platen drive plunger assembly after cooperating with half ball groove.
The present invention compared with prior art the advantages of:
1, make pitch after being cooperatively connected by the ball bearing II and ball bearing and pitch that are set in installation inclined hole
It is rotatablely connected with the rear pump housing, traditional fixed pitch is changed to rotary pitch, so that pitch is followed plunger rotation, makes
Traditional sliding friction becomes rolling friction, substantially reduces the frictional force of pitch and plunger, improves mechanical efficiency, meets
The belief system requirement of hydraulic pump；
2, plunger and piston shoes are designed as plunger assembly, are fixedly connected with plunger by locking nut with piston shoes, structure letter
It is single, it is quickly and expediently installed, greatly reduces the assembly difficulty of each section, meet craftsmanship requirement；
3, this structure be applied to goat system, improve the reliability of hydraulic pump, can complete import substitutes,
Strong technical guarantee is provided for the development of China railways system.
Detailed description of the invention
Fig. 1 is schematic diagram of internal structure of the present invention；
Fig. 2 is the mounting structure schematic diagram of the pump housing and pitch after the present invention；
Fig. 3 is plunger assembly structural schematic diagram of the present invention.
Specific embodiment
1-3 describes a kind of embodiment of the invention with reference to the accompanying drawing.
Novel inclined tray axial plunger pump, including the preceding pump housing 9, the intermediate pump housing 17, cylinder body 12, the rear pump housing 18 and transmission shaft
2, the preceding pump housing 9 is installed on 2 one end of transmission shaft by bearing, the cylinder body 12 be set in 2 other end of transmission shaft and with transmission
The spline fitted of 2 other end of axis connects, and steel loop 13 and 12 excircle of cylinder body are interference fitted, and the intermediate pump housing 17 passes through needle roller axis
I 14 and the mating connection of 13 excircle of steel loop are held, described intermediate 17 one end of the pump housing and the preceding pump housing 9 are fixedly connected and the intermediate pump housing 17 is another
One end is fixedly connected with the rear pump housing 18 for being located at 2 other end of transmission shaft, is formed with installation inclined hole 1 in the rear pump housing 18 and is set to peace
It fills pitch 20 and the rear pump housing 18 inside inclined hole 1 to be rotatablely connected, platen 15 is equipped between the pitch 20 and cylinder body 12, if
Steel ball 16 and platen 15 in the steel ball and spring holder assembly in 2 other end spline of transmission shaft are butted on 15 middle part of platen after cooperating,
It is formed on 12 end face of cylinder body on multiple equally distributed plunger holes 3 and platen 15 and is formed with lead to corresponding with 3 hole location of plunger hole
Hole 4,11 one end of plunger assembly are inserted into plunger hole 3 after passing through through-hole 4 and are slidably matched with plunger hole 3, the plunger assembly 11
The other end is butted on 20 end face of pitch after cooperating with the through-hole 4 on platen 15 and makes after driving plunger 6 to rotate by transmission shaft 2
Pitch 20 follows plunger 6 to rotate；Specifically, the installation inclined hole 1 is stepped hole and installation inclined hole 1 is provided with needle bearing II
19 and ball bearing 21, the pitch 20 is installed on the rear pump housing 18 after being interference fitted with needle bearing II 19 and ball bearing 21
On；Specifically, the plunger assembly 11 includes plunger 6 and piston shoes 7, installation rank hole 8, the installation are formed with inside the piston shoes 7
8 right end of rank hole is equipped with locking nut 22 and one end is formed in the externally threaded insertion of plunger 6 installation rank hole 8 and cooperates with locking nut 22
Plunger 6 is fixedly installed on piston shoes 7 after screwing, 6 other end end of plunger is butted on pitch 20 and is set to plunger 6 separately
In 10 lower end of the limited cap insertion through-hole 4 of one end, the piston shoes 7 pass through through-hole 4 and are inserted into plunger hole 3 and slide with plunger hole 3
Cooperation；Specifically, 15 right side of the platen middle part is formed with V-shaped groove and V-shaped groove bottom surface is formed with hemisphere compatible with steel ball 16
Platen 15 is pushed to drive plunger assembly 11 by pitch by steel ball and spring holder assembly after slot 5, the steel ball 16 and the cooperation of half ball groove 5
20 push against.
In this structure, under the action of steel ball and spring holder assembly, steel ball 16 is pushed against always on 15 end face of platen, and by
Platen 15 drives plunger assembly 11 to push against 6 end of plunger in plunger assembly 11 on 20 end face of pitch, when work, transmission
Axis 2 drives steel ball and spring holder assembly, cylinder body 12, plunger assembly 11 and platen 15 to rotate synchronously after rotating, in the effect of plunger 6
Under, pitch 20 follows plunger 6 to rotate, at this point, plunger 6 and pitch 20 are pivoting friction, frictional force is substantially reduced, such as Fig. 1
Shown, under the action of pitch 20, the sealed volume that the plunger 6 and cylinder body 12 for turning to 2 top of transmission shaft are formed is maximum, liquid
Pressure oil is pressed under the action of atmosphere through oil inlet, and the sealing that the plunger 6 and cylinder body 12 positioned at 2 lower section of transmission shaft are formed is held
Chamber is minimum, and hydraulic oil is forced out under the action of atmosphere through oil outlet.This structure passes through the ball axis being set in installation inclined hole 1
It is rotatablely connected pitch 20 and the rear pump housing 18 after holding II 19 and ball bearing 21 and the mating connection of pitch 20, traditional is consolidated
Fixed pattern pitch 20 is changed to rotary pitch 20, makes pitch 20 that plunger 6 be followed to rotate, traditional sliding friction is made to become rolling
Dynamic friction substantially reduces the frictional force of pitch 20 Yu plunger 6, improves mechanical efficiency, meets the reliability system of hydraulic pump
System requires, and plunger 6 and piston shoes 7 are designed as plunger assembly, is fixedly connected with plunger 6 by locking nut 22 with piston shoes 7, structure
Simply, it is quickly and expediently installed, greatly reduces the assembly difficulty of each section, meet craftsmanship requirement, this structure is applied to railway
Goat system improves the reliability of hydraulic pump, can complete import substitutes, the development for China railways system provides
Strong technical guarantee.
Above-described embodiment, only presently preferred embodiments of the present invention, is not intended to limit the invention practical range, therefore all with this
The equivalence changes that content described in invention claim is done should all be included within scope of the invention as claimed.
Claims (2)
1. novel inclined tray axial plunger pump, including the preceding pump housing (9), the intermediate pump housing (17), cylinder body (12), the rear pump housing (18) and
Transmission shaft (2), the preceding pump housing (9) are installed on transmission shaft (2) one end by bearing, and the cylinder body (12) is set in transmission shaft
(2) it the other end and being connect with the spline fitted of transmission shaft (2) other end, steel loop (13) and cylinder body (12) excircle are interference fitted,
The intermediate pump housing (17) is cooperatively connected by needle bearing I (14) and steel loop (13) excircle, the intermediate pump housing (17) one
End is fixedly connected with the preceding pump housing (9) and the intermediate pump housing (17) other end and the rear pump housing (18) positioned at transmission shaft (2) other end are solid
Fixed connection, it is characterised in that: be formed with installation inclined hole (1) after described in the pump housing (18) and be set to the internal inclination of installation inclined hole (1)
Disk (20) and the rear pump housing (18) are rotatablely connected, and are equipped with platen (15) between the pitch (20) and cylinder body (12), are set to transmission
The steel ball (16) in steel ball and spring holder assembly in axis (2) other end spline is butted in platen (15) after cooperating with platen (15)
Portion is formed on multiple equally distributed plunger holes (3) and platen (15) on cylinder body (12) end face and is formed with and plunger hole (3) hole
The corresponding through-hole (4) in position, plunger assembly (11) one end pass through through-hole (4) and are inserted into plunger hole (3) and slide afterwards with plunger hole (3)
It is butted on pitch (20) end face simultaneously after cooperation, plunger assembly (11) other end and through-hole (4) cooperation on platen (15)
Make pitch (20) that plunger (6) be followed to rotate after driving plunger (6) rotation by transmission shaft (2), the installation inclined hole (1) is rank
Terraced hole and installation inclined hole (1) be provided with needle bearing II (19) and ball bearing (21), the pitch (20) and needle bearing
It is installed on the rear pump housing (18) after II (19) and ball bearing (21) interference fit, the plunger assembly (11) includes plunger (6)
With piston shoes (7), the piston shoes (7) are internal to be formed with installation rank hole (8), and the installation rank hole (8) right end is equipped with locking nut (22)
And one end be formed in externally threaded plunger (6) insertion installation rank hole (8) it is after being screwed with locking nut (22) cooperation that plunger (6) are solid
Loaded on piston shoes (7), plunger (6) other end end is butted on pitch (20) and is set to plunger (6) other end for Dingan County
Limited cap (10) lower end is inserted into through-hole (4), and the piston shoes (7) pass through in through-hole (4) insertion plunger hole (3) and and plunger hole
(3) it is slidably matched.
2. novel inclined tray axial plunger pump according to claim 1, it is characterised in that: platen (15) right side
Middle part is formed with V-shaped groove and V-shaped groove bottom surface is formed with and steel ball (16) compatible half ball groove (5), the steel ball (16) and half ball groove
(5) push platen (15) that plunger assembly (11) is driven to push against pitch (20) by steel ball and spring holder assembly after cooperating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710235097.8A CN106884767B (en) | 2017-04-12 | 2017-04-12 | Novel inclined tray axial plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710235097.8A CN106884767B (en) | 2017-04-12 | 2017-04-12 | Novel inclined tray axial plunger pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106884767A CN106884767A (en) | 2017-06-23 |
| CN106884767B true CN106884767B (en) | 2019-08-09 |
Family
ID=59183437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710235097.8A Active CN106884767B (en) | 2017-04-12 | 2017-04-12 | Novel inclined tray axial plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106884767B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654365A (en) * | 2017-10-09 | 2018-02-02 | 陕西航天动力高科技股份有限公司 | A kind of plunger and plunger pump |
| CN108035858A (en) * | 2017-12-04 | 2018-05-15 | 陕西航天动力高科技股份有限公司 | A kind of plunger pump |
| CN110748468B (en) * | 2019-11-28 | 2020-07-03 | 厦门大学 | High-speed high-pressure axial plunger pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055041A (en) * | 1990-02-19 | 1991-10-02 | 三电有限公司 | Ball-and-socket connector lubricating structure rotation detecting device refrigeration compressor is arranged |
| CN2164469Y (en) * | 1993-03-05 | 1994-05-11 | 建设部长沙建设机械研究院 | Hydraulic pump |
| CN2268129Y (en) * | 1996-08-20 | 1997-11-19 | 北京铁路局太原电务器材厂 | Semi-axis type axial plunger pump |
| CN201687676U (en) * | 2010-05-21 | 2010-12-29 | 李泽民 | Half-shaft adjustable axial plunger pump |
| CN102454567A (en) * | 2010-10-15 | 2012-05-16 | 夏成法 | Low-noise and large-power hydraulic plunger pump |
| CN206785575U (en) * | 2017-04-12 | 2017-12-22 | 宝鸡和新机电设备有限公司 | New inclined tray axial plunger pump |
-
2017
- 2017-04-12 CN CN201710235097.8A patent/CN106884767B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055041A (en) * | 1990-02-19 | 1991-10-02 | 三电有限公司 | Ball-and-socket connector lubricating structure rotation detecting device refrigeration compressor is arranged |
| CN2164469Y (en) * | 1993-03-05 | 1994-05-11 | 建设部长沙建设机械研究院 | Hydraulic pump |
| CN2268129Y (en) * | 1996-08-20 | 1997-11-19 | 北京铁路局太原电务器材厂 | Semi-axis type axial plunger pump |
| CN201687676U (en) * | 2010-05-21 | 2010-12-29 | 李泽民 | Half-shaft adjustable axial plunger pump |
| CN102454567A (en) * | 2010-10-15 | 2012-05-16 | 夏成法 | Low-noise and large-power hydraulic plunger pump |
| CN206785575U (en) * | 2017-04-12 | 2017-12-22 | 宝鸡和新机电设备有限公司 | New inclined tray axial plunger pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106884767A (en) | 2017-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106884767B (en) | Novel inclined tray axial plunger pump | |
| US2324291A (en) | Pump | |
| CN106593851A (en) | Inclined disc and axial plunger pump/motor adopting inclined disc | |
| CN101418784A (en) | Positive and negative rotating axial plunger pump | |
| CN2328811Y (en) | Electromagnetic controlled variable axial plunger pump | |
| US8807297B2 (en) | Mechanical disk brake caliper assembly | |
| CN206785575U (en) | New inclined tray axial plunger pump | |
| CN110397565A (en) | A kind of Variable plunger pump | |
| CN101539130B (en) | Hydraulic clino-axial piston pump or motor | |
| CN205634761U (en) | Screw pushes away cheng hengli push mechanism greatly | |
| CN201096061Y (en) | 50Mpa self complementing type electrohydraulic proportional control axial plunger variable pump | |
| JPS6385266A (en) | Axial piston pump | |
| CN108105048A (en) | Hydraulic axial piston unit with fixed pressing device placed in the middle | |
| CN208123016U (en) | A kind of axial plunger pump | |
| CN201433866Y (en) | Inclined-shaft hydraulic plunger pump or a motor | |
| CN201433867Y (en) | Shaft-type hydraulic plunger pump or motor | |
| CN101865267B (en) | Connecting rod type transmission mechanism | |
| CN210000334U (en) | Damping adjusting device for handle of brake controller | |
| CN210422902U (en) | Antipollution dual-redundancy variable plunger pump | |
| CN2886207Y (en) | Hydraulic damping device | |
| CN209354658U (en) | A kind of novel sealing component | |
| CN209510547U (en) | A kind of axial plunger pump | |
| CN101539129A (en) | Hydraulic axial piston pump or motor | |
| CN221093564U (en) | Elevator brake | |
| CN203770047U (en) | Axial plunger pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |