CN105371088A - Synchronous hydraulic pump device - Google Patents
Synchronous hydraulic pump device Download PDFInfo
- Publication number
- CN105371088A CN105371088A CN201410432575.0A CN201410432575A CN105371088A CN 105371088 A CN105371088 A CN 105371088A CN 201410432575 A CN201410432575 A CN 201410432575A CN 105371088 A CN105371088 A CN 105371088A
- Authority
- CN
- China
- Prior art keywords
- pump
- core assembly
- synchronous
- hydraulic pump
- unit
- 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.)
- Pending
Links
Landscapes
- Reciprocating Pumps (AREA)
Abstract
The invention provides a synchronous hydraulic pump device. Both-way alternate hydraulic power input of a peripheral device can be utilized as a power source of the device, and lubricant output is provided for the outside in a synchronous alternate manner. The hydraulic pump device comprises a first transmission mechanism (10) used for converting the hydraulic power input into the linear reciprocating movement of a mechanical component (12) in the first direction, a first pump core assembly (30), a second pump core assembly (30') and a second transmission mechanism (20), wherein the first pump core assembly (30) and the second pump core assembly (30') are used for providing lubricant output for the outside in the synchronous alternate manner, and the second transmission mechanism (20) is used for converting the linear reciprocating movement of the mechanical component (12) in the first direction into the alternate linear reciprocating movement of respective pump plugs (32) of the first pump core assembly (30) and the second pump core assembly (30') in the second direction. The first pump core assembly (30) and the second pump core assembly (30') body comprise cylinders (31) used for containing lubricant and the pump plugs (32) capable of doing the linear reciprocating movement in the cylinders. The pump plugs (32) suck the lubricant into the cylinders from the outside of the cylinders (31) through lubricant inlets (36) in the pumping stroke, and the lubricant in the cylinders (31) is discharged out of the synchronous hydraulic pump device through lubricant outlets (34) in the compression stroke. The first direction and the second direction are roughly perpendicular to each other.
Description
Technical field
The present invention relates to a kind of synchronous hydraulic pump-unit (hydraulicsynchronizingpump) for outwardly providing alternately oiling agent to export.
Background technique
Existing for oiling agent export synchronous hydraulic pump-unit mainly with electric power as power source.But, in actual applications, some equipment, such as transportable concrete pump pressure equipment (mobileconcretepumpingequipment), needs be but that a kind of alternate hydraulic of himself that can utilize exports the synchronous hydraulic pump-unit itself providing synchronous oiling agent to input for this mobile device as power source.Herein, so-called " synchronously " refer to two strands of synchronous hydraulic pump-unit alternately oiling agent output two strands of alternate hydraulic outputting powers must be provided to keep synchronous with equipment.
Summary of the invention
The invention provides a kind of two way alternate hydraulic power of external equipment that utilizes to input as its power source, the synchronous hydraulic pump-unit that the mode can replaced with timed delivery outwardly provides oiling agent to export.Described hydraulic pumping unit comprises: for described hydraulic power input is converted into the first driving mechanism that mechanical component carries out straight reciprocating motion in a first direction; The first pump core assembly that the mode replaced with timed delivery outwardly provides oiling agent to export and the second pump core assembly; And for the straight reciprocating motion in a first direction of described mechanical component being converted into reciprocating second driving mechanism of each self-pumping plug alternating rectilinear in a second direction of the first pump core assembly and the second pump core assembly.Described first pump core assembly and the second pump core assembly all comprise for lubricant cylinder body and the pump plug of straight reciprocating motion can be made in cylinder body.Oiling agent can be drawn into cylinder interior from cylinder body outside by lubricant entry (36) by described pump plug in aspiration stroke; Oiling agent can be discharged to outside synchronous hydraulic pump-unit from cylinder interior through lubricant outlet in compression stroke.Described first direction and described second direction are roughly mutually vertical.
The two way alternate hydraulic power input adopting the synchronous hydraulic pump-unit of said structure can directly utilize the external equipments such as transportable concrete pump truck to provide, as its power source, thus provides power without the need to extra power supply.
Various mode of execution of the present invention and useful technique effect is described in detail below in conjunction with accompanying drawing.
Accompanying drawing explanation
Fig. 1 be synchronous hydraulic pump-unit of the present invention and lubricant container with the use of overall structure schematic diagram;
Fig. 2 a is the overall structure schematic diagram of the first mode of execution of synchronous hydraulic pump-unit of the present invention;
Fig. 2 b is the vertical profile schematic cross-section of the first mode of execution of synchronous hydraulic pump-unit of the present invention;
Fig. 3 is the structural representation of an independent pump core assembly of synchronous hydraulic pump-unit of the present invention;
Fig. 4 a and 4b is the structural representation of two auxiliary cams that inversion symmetry is arranged;
Fig. 5 is the perspective view of the second mode of execution of described synchronous hydraulic pump-unit;
Fig. 6 is the structural representation of the 3rd driving mechanism driving paddle one-way rotation; And
Fig. 7 be with synchronous hydraulic pump-unit of the present invention with the use of the structural representation of hand pump assembly.
Embodiment
As shown in Figure 1, synchronous hydraulic pump-unit of the present invention must with lubricant container (lubricantreservoir) with the use of.Wherein, described hydraulic pumping unit is contained in the base 2 be arranged in below lubricant container 1 on the whole.Lubricant container 1 seals with base 2 and mates, and oiling agent, under the double action of gravity and paddle (stirringpaddle) 3, injects base 2 by inner passage, the synchronous hydraulic pump-unit in submergence base 2.
What Fig. 2 a showed is the overall structure schematic diagram of the synchronous hydraulic pump-unit being arranged in base 2.On the whole, synchronous hydraulic pump-unit comprises the first driving mechanism 10, second driving mechanism 20 and two groups of pump core assembly (pumpelementassemblies) 30 and 30 ＇.Described first driving mechanism 10 comprises pair of hydraulic cylinders (hydrauliccylinders) 11 and 11 ＇ that opening is arranged in opposite directions and the plunger rod (pistonrod) 12 that can move back and forth between this is to oil hydraulic cylinder further.Described oil hydraulic cylinder 11 and 11 ＇ is reliably fixed on the sidewall of base 2, receive the input of two way alternate hydraulic power from extraneous (such as transportable concrete pump pressure equipment etc.) respectively by hydraulic oil gateway (hydraulicoilinlet & outlet) 13 and 13 ＇ (wherein 13 is not shown in the drawings), thus make plunger rod 12 under the effect of two way alternate hydraulic oil input power, in oil hydraulic cylinder 11 and 11 ＇, carry out straight reciprocating motion.Described straight reciprocating motion is carried out on pair of hydraulic cylinders 11 and 11 ＇ and the determined direction of plunger rod 12, is defined as in this article " first direction ".Functionally, the effect of the first driving mechanism 10 is that the converting hydraulic power that the external world is alternately inputted is mechanical component (such as plunger rod 12) straight reciprocating motion in a first direction.
Second driving mechanism 20 structurally can have various ways.In the structural representation of the synchronous hydraulic pump-unit under the first mode of execution of the present invention shown in Fig. 2 a, the second driving mechanism 20 comprises rotating shaft 21 and can with the tooth sector 22 of rotating shaft 21 synchronous axial system and two auxiliary cam 23 and 23 ＇.The two ends of rotating shaft 21 are reliably fixed on the upper bottom surface of base 2 by rotatable parts such as bearings.Tooth sector 22 keeps synchronous by engaging with the bar shaped gear (rackpinion) 14 on plunger rod 12 with plunger rod 12 straight reciprocating motion in a first direction.As power input link, the effect of tooth sector 22 is to drive rotating shaft 21 and two auxiliary cam 23 and 23 ＇ to carry out synchronous reciprocating rotation in certain angular range.In longitudinal sectional drawing in figure 2b, two auxiliary cam 23 and 23 ＇ are separately positioned on rotating shaft 21 two ends in the longitudinal direction, and tooth sector 22 is then arranged on the position between two auxiliary cam 23 and 23 ＇.
Alternatively, described power input link also can be the swing arm (rockingarm in oscillating guidebar mechanism (oscillatingguide-barmechanism), be similar to the fork 44 shown in Fig. 5), keep synchronous hunting by sliding adaptive with the slide block (slider) 15 that is fixedly installed on plunger rod 12 with plunger rod.Oscillating guidebar mechanism is common structure a kind of in mechanical field, for being the reciprocally swinging of guide rod by the convert rotational motion of crank, is not described in detail herein.
That adopt in Fig. 2 a and 2b is identical two groups of pump core assemblies 30 and 30 ＇ in structure.The detailed construction of two groups of pump core assembly 30 and 30 ＇ as shown in Figure 3.Each group pump core assembly 30 or 30 ＇ all comprise for lubricant cylinder body (cylinderbody) 31 and the pump plug (pumppiston) 32 of straight reciprocating motion can be made in cylinder body.The afterbody of pump plug 32 is provided with roller 33, rolls for coordinating with cam 23 and 23 ＇ in the second driving mechanism 20.As shown in Figure 2 a, when tooth sector 22 moves along direction shown in arrow A in figure along with plunger rod 12, the oiling agent of cam 23 pushing rolling wheels 33 extruding cylinder body 31 inside in the compression stroke (compressionstroke) of the first pump core assembly 30, thus oiling agent is discharged to outside hydraulic pumping unit from cylinder interior through lubricant outlet 34; And when tooth sector 22 moves along direction shown in arrow A ＇ in Fig. 2 along with plunger rod 12, in compression stroke by 35, spring compressing under the effect of self-recovery power, driving pump plug 32 is along the direction action contrary with compression stroke before, force the first pump core assembly 30 to enter aspiration stroke (intakestroke), oiling agent is drawn into cylinder interior from cylinder body 31 outside through lubricant entry 36 by the negative pressure utilizing suction to produce.
Be necessary to point out, in the cam structure in figs 4 a and 4b, what two auxiliary cam 23 and 23 ＇ adopted is inversion symmetry (that is " Mirror Symmetry ") design.Moreover, the working surface profile of two auxiliary cam 23 and 23 ＇ all adopts sinusoidal curve to design, and is between crest and trough the one section of curve shape adjoined.The rigid impulse (impactloads) that this contour shape can reliably avoid cam to cause pump core assembly 30 and 30 ＇ in the process (i.e. the compression stroke of pump core assembly) of thrust roller 33, effectively reduces the noise of hydraulic pumping unit and improves system lifetim.Under the concrete state shown in Fig. 2 a and 2b, the position that the roller 33 of pump core assembly 30 contacts cam 23 is just in time the crest location of the latter's working surface profile (workingsurfaceprofile), and the position that roller 33 ＇ of pump core assembly 30 ＇ contacts cam 23 ＇ is just in time the wave trough position of cam 23 ＇ working surface profile.Visible, when pump core assembly 30 is in compression stroke, pump core assembly 30 ＇ is then just in time in aspiration stroke.Therefore, the reciprocating action of two groups of pump core assembly 30 and 30 ＇ is alternately reverse all the time, and the output of oiling agent also correspondingly keeps synchronous with the alternate hydraulic input power finally promoting two groups of pump core assemblies 30 and 30 ＇.
Fig. 5 display be the overall structure schematic diagram of synchronous hydraulic pump-unit under the second mode of execution of the present invention.In the structure shown in Fig. 5, the second driving mechanism 20 is reduced to two auxiliary cam 23 and 23 ＇ be arranged on plunger rod 12 further.Easy understand, as long as oil hydraulic cylinder 11 and 11 ＇ can reliably be fixed on the sidewall of base 2, and oil hydraulic cylinder and plunger rod all have enough intensity, and this structure is just enough to secure support pump core assembly 30 and 30 ＇.Adopt this cam design, not only structure is simple, and with low cost.As a kind of preferred version, the opposite side that can also be positioned at pump core assembly 30 and 30 ＇ at plunger rod 12 arranges two secondary support roller (supportingrollers) 24 and 24 ＇, for providing extra cross-brace for plunger rod 12.This two secondary support roller 24 can be corresponding with pump plug the roller 33 and 33 ＇ position of pump core assembly with the position of 24 ＇, thus realize better support effect.
When temperature is lower, oiling agent (especially lubricating grease) easily becomes thickness.For impelling oiling agent can flow into hydraulic pumping unit smoothly, as shown in Figure 1, be necessary in lubricant container, arrange paddle 3.The 3rd driving mechanism is defined as in the present invention for driving the driving mechanism of paddle.As shown in Figure 6, the 3rd driving mechanism 40 structurally comprise ratchet (ratchetwheel) 41, can with the stirring shaft 42 of ratchet synchronous axial system and can the oscillating guidebar mechanism 43 of driving pawl 41 reciprocally swinging in certain angular range.As previously mentioned, oscillating guidebar mechanism is common structure a kind of in mechanical field, for being the reciprocally swinging of guide rod by the convert rotational motion of crank.In the situation shown in Fig. 6, oscillating guidebar mechanism 43 is directly connected with the rotating shaft 21 in the second driving mechanism, thus can obtain power resources from the second driving mechanism 20.In the situation shown in Fig. 5, oscillating guidebar mechanism 43 is directly connected with the fixing slide block 15 on plunger rod 12, also can obtain power resources from the first driving mechanism 10.Easy understand, any type of oscillating guidebar mechanism 43, as long as power can be conducted to the 3rd driving mechanism from the first driving mechanism or the second driving mechanism, just can realize the function of paddle one-way rotation of the present invention, and be not limited to the concrete structure shown in Fig. 5 and Fig. 6 and form.
Be necessary to point out, synchronous hydraulic pump-unit in practice often with Double-wire distributor (due-linelubricantdistributor) with the use of.As shown in fig. 1, Double-wire distributor 4 structurally has two lubricant entries and two lubricant outlets, in design for two lubricating oil paties provide the oiling agent alternative supply of prescribed dose.Double-wire distributor is the matured product in lubricating area, and thus its structure is in no longer elaborating herein.In use, two groups of pump core assemblies 30 are connected with two lubricant entries of Double-wire distributor respectively with the lubricant outlet of 30 ＇, and two lubricant outlets of Double-wire distributor provide the timed delivery of prescribed dose to export for oiling agent for the external world.
Except Double-wire distributor, synchronous hydraulic pump-unit sometimes also need with Manual lubrication pump (hand-drivelubricantpump) with the use of.In this case, Manual lubrication pump provides the 3rd road oiling agent beyond two groups of pump core assemblies to export for the external world.As shown in Figure 7, Manual lubrication pump assembly 5 can independently be arranged on base 2 removably, and its oiling agent is exported and can be achieved by the additional lubrication agent passage be arranged in Double-wire distributor.
It will be understood by those of skill in the art that change and the improvement of relative synchronous hydraulic pumping unit and various application thereof, as long as meet the restriction of following claims, all belong to protection scope of the present invention.
Claims (10)
1. a synchronous hydraulic pump-unit, the two way alternate hydraulic power input of external equipment can be utilized as its power source, and the mode replaced with timed delivery outwardly provides oiling agent to export, and described hydraulic pumping unit comprises:
For described hydraulic power input is converted into the first driving mechanism (10) that mechanical component (12) carries out straight reciprocating motion in a first direction;
The first pump core assembly (30) that the mode replaced with timed delivery outwardly provides oiling agent to export and the second pump core assembly (30 ＇), described first pump core assembly (30) and the second pump core assembly (30 ＇) all comprise for lubricant cylinder body (31) and the pump plug (32) of straight reciprocating motion can be made in cylinder body, oiling agent is drawn in cylinder body from cylinder body (31) outside by lubricant entry (36) by described pump plug (32) in aspiration stroke, in compression stroke, oiling agent is discharged to outside synchronous hydraulic pump-unit through lubricant outlet (34) in cylinder body (31), and
For described mechanical component (12) straight reciprocating motion being in a first direction converted into reciprocating second driving mechanism (20) of each self-pumping plug (32) alternating rectilinear in a second direction of the first pump core assembly (30) and the second pump core assembly (30 ＇);
It is characterized in that: described first direction and described second direction are mutually vertical substantially.
2. synchronous hydraulic pump-unit as claimed in claim 1, it is characterized in that: described second driving mechanism (20) is rotation shaft driving mechanism, comprise rotating shaft (21) and can along with the power input link (22) of rotating shaft synchronous axial system and two auxiliary cams (23 and 23 ＇), described power input link (22) is under the driving of the straight reciprocating motion of described mechanical component (12), described rotating shaft (21) and two auxiliary cams (23 and 23 ＇) are driven to carry out synchronous axial system in certain angular range, described two auxiliary cams (23 and 23 ＇) adopt inversion symmetry to arrange, the each self-pumping plug (32) promoting the first pump core assembly (30) and the second pump core assembly (30 ＇) successively in a second direction carry out alternating rectilinear to-and-fro motion.
3. synchronous hydraulic pump-unit as claimed in claim 2, it is characterized in that: described power input link (22) is tooth sector (22), keeps with it synchronous by engaging with the bar shaped gear (14) on described mechanical component (12); Or be pendulum guide rod, by adaptive with the fixing skid on described mechanical component (12) and keep being synchronized with the movement with mechanical component (12).
4. synchronous hydraulic pump-unit as claimed in claim 1, is characterized in that: described second driving mechanism (20) is for being arranged on two auxiliary cams (23 and 23 ＇) on described mechanical component (12).
5. synchronous hydraulic pump-unit as claimed in claim 4, is characterized in that: described mechanical component (12) is provided with two secondary support rollers (24 and 24 ＇) in the opposition side position that it is positioned at two auxiliary cams (23 and 23 ＇).
6. the synchronous hydraulic pump-unit according to any one of claim 1 to 5, it is characterized in that: the pair of hydraulic cylinders (11 and 11 ＇) that described first driving mechanism (20) is oppositely arranged by opening and the plunger rod (12) that can carry out straight reciprocating motion in this pair of hydraulic cylinders (11 and 11 ＇) are formed, and described mechanical component (12) straight reciprocating motion in a first direction refers to that described plunger rod (12) carries out straight reciprocating motion under the driving of two way alternate hydraulic power in described pair of hydraulic cylinders (11 and 11 ＇).
7. the synchronous hydraulic pump-unit according to any one of claim 2 to 5, is characterized in that: the working surface profile line of described two auxiliary cams (23 and 23 ＇) adopts the curve shape between crest and trough adjoined in sinusoidal curve.
8. the synchronous hydraulic pump-unit according to any one of claim 1 to 5, is characterized in that:
Described synchronous hydraulic pump-unit and lubricant container (1) with the use of, be positioned in the middle of the base (2) below described lubricant container (1), the inside of described lubricant container (1) is provided with paddle (3), for stirring and forcing oiling agent to flow into base (2) downwards, thus the synchronous hydraulic pump-unit that submergence is whole; And
Described synchronous hydraulic pump-unit comprises for driving paddle (3) one-way rotation the 3rd driving mechanism (40), described 3rd driving mechanism (40) comprises ratchet (41) and the stirring shaft (42) with described paddle (3) synchronous axial system, described ratchet (41) obtains power by oscillating guidebar mechanism (43) from the first driving mechanism (10) or the second driving mechanism (20), drives stirring shaft (42) and the synchronous one-way rotation of paddle (3).
9. the synchronous hydraulic pump-unit according to any one of claim 1 to 5, it is characterized in that: described synchronous hydraulic pump-unit and Double-wire distributor assembly (4) with the use of, described first pump core assembly (30) is connected with two lubricant entries of Double-wire distributor assembly respectively with the lubricant outlet (34) of the second pump core assembly (30 ＇).
10. the synchronous hydraulic pump-unit according to any one of claim 1 to 5, it is characterized in that: described synchronous hydraulic pump-unit and Manual lubrication pump assembly (5) with the use of, described Manual lubrication pump assembly (5) provides the 3rd road oiling agent beyond the first pump core assembly (30) and the second pump core assembly (30 ＇) to export by the extra lubricant passageway be arranged in Double-wire distributor (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410432575.0A CN105371088A (en) | 2014-08-29 | 2014-08-29 | Synchronous hydraulic pump device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410432575.0A CN105371088A (en) | 2014-08-29 | 2014-08-29 | Synchronous hydraulic pump device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105371088A true CN105371088A (en) | 2016-03-02 |
Family
ID=55373533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410432575.0A Pending CN105371088A (en) | 2014-08-29 | 2014-08-29 | Synchronous hydraulic pump device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105371088A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113490812A (en) * | 2019-03-06 | 2021-10-08 | 瓦锡兰芬兰有限公司 | Pump module and piston engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB460823A (en) * | 1936-06-05 | 1937-02-04 | Charles Edward Stewart | Improvements in or relating to lubricating pumps |
| DE20118920U1 (en) * | 2000-10-28 | 2002-03-14 | Lincoln Gmbh | Automatic lubrication device |
| EP1112820A3 (en) * | 1999-12-27 | 2003-01-22 | Lincoln Industrial Corporation | Lubrication system |
| CN201100515Y (en) * | 2007-08-06 | 2008-08-13 | 韩玉东 | Pole piston lubrication pump |
| CN201443675U (en) * | 2009-06-12 | 2010-04-28 | 潍坊市机械设计研究院有限责任公司 | Grease pump |
-
2014
- 2014-08-29 CN CN201410432575.0A patent/CN105371088A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB460823A (en) * | 1936-06-05 | 1937-02-04 | Charles Edward Stewart | Improvements in or relating to lubricating pumps |
| EP1112820A3 (en) * | 1999-12-27 | 2003-01-22 | Lincoln Industrial Corporation | Lubrication system |
| DE20118920U1 (en) * | 2000-10-28 | 2002-03-14 | Lincoln Gmbh | Automatic lubrication device |
| CN201100515Y (en) * | 2007-08-06 | 2008-08-13 | 韩玉东 | Pole piston lubrication pump |
| CN201443675U (en) * | 2009-06-12 | 2010-04-28 | 潍坊市机械设计研究院有限责任公司 | Grease pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113490812A (en) * | 2019-03-06 | 2021-10-08 | 瓦锡兰芬兰有限公司 | Pump module and piston engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101696681A (en) | Cam-restricting reciprocating piston type compressor | |
| CN104100372A (en) | Opposed piston guide rail rolling type engine/compressor and working method thereof | |
| CN203822985U (en) | Rotation reciprocating conversion mechanism | |
| CN202598093U (en) | Oil scraping device of hydraulic lubricating pump | |
| CN204365646U (en) | A kind of throwing elevator of supersonic wave cleaning machine | |
| CN105371088A (en) | Synchronous hydraulic pump device | |
| CN2900853Y (en) | Large displacement plunger pump | |
| CN111648933B (en) | Fracturing pump driven by linear motor | |
| CN203051025U (en) | Reciprocating type double-cylinder compressor | |
| CN102953954A (en) | Electric oil pump | |
| CN203939663U (en) | Reciprocal compressor and wrist pin thereof | |
| MX2017010612A (en) | High pressure pump for pumping a highly viscous material. | |
| CN202580555U (en) | Lubrication system and construction machinery | |
| CN201110360Y (en) | Novel crank connecting-rod mechanism | |
| CN203925743U (en) | A kind of opposed pistons guide rail rolling type motor/gas compressor | |
| CN103449120A (en) | Transition pushing hand device of packaging machine | |
| CN205173398U (en) | Eccentric gear shaft connecting rod sliding block device | |
| CN202946334U (en) | Large-power five-plunger high pressure reciprocation pump | |
| CN105134539A (en) | Eccentric rotation power end structure of reciprocation pump | |
| CN202768756U (en) | Guide rod mechanism switchover-free type mechanical reversing apparatus | |
| CN201202603Y (en) | Improved plunger pump structure | |
| CN203297908U (en) | Bidirectional plunger lubricating oil pump | |
| CN102853043A (en) | Non-switching type mechanical reversing device of guide rod mechanism | |
| CN205423090U (en) | Reciprocal drive return means of measuring pump | |
| CN203730127U (en) | Power transmission mechanism for internal combustion engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160302 |