CN114321085B - Pressing force adjusting assembly of plunger type hydraulic element - Google Patents
Pressing force adjusting assembly of plunger type hydraulic element Download PDFInfo
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- CN114321085B CN114321085B CN202111643488.6A CN202111643488A CN114321085B CN 114321085 B CN114321085 B CN 114321085B CN 202111643488 A CN202111643488 A CN 202111643488A CN 114321085 B CN114321085 B CN 114321085B
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Abstract
The invention relates to the technical field of hydraulic elements, in particular to a pressing force adjusting assembly of a plunger type hydraulic element, which comprises a connecting shell and a piston rod, wherein the bottom of the connecting shell is rotatably connected with a first adjusting knob and a second adjusting knob, one end of the first adjusting knob is connected with a pressing force adjusting assembly through the connecting shell, one end of the second adjusting knob is connected with a balance adjusting assembly through the connecting shell, the top end of the pressing force adjusting assembly is connected with a contact base, the top end of the balance adjusting assembly is connected with the contact base, the top end of the contact base is connected with a contact piece in a sliding manner, the top end of the contact piece is connected with the bottom of the piston rod, two sides of the pressing force adjusting assembly are fixedly provided with connecting plates, and the inner wall of the bottom of the connecting shell is fixedly provided with two guide rods. The invention can adjust the pressing force and the balance of the piston rod, and has practicability.
Description
Technical Field
The invention relates to the technical field of hydraulic elements, in particular to a pressing force adjusting assembly of a plunger type hydraulic element.
Background
The plunger type hydraulic component mainly comprises an axial plunger pump (motor), a floating cup type hydraulic pump (motor), a hydraulic transformer based on the axial plunger pump and the floating cup type hydraulic pump (motor), and the like, and a residual pressing force coefficient design principle is usually adopted in the design process of a flow distribution pair of the hydraulic component. The residual pressure coefficient has great influence on the performance of the distribution pair, if the residual pressure coefficient is too large, the friction between the distribution plate and the plunger cylinder is increased, the mechanical efficiency is reduced, and even the 'disc burning' can occur; if the residual compression force coefficient is too small, the leakage amount is increased and the volumetric efficiency is reduced due to the fact that the fit clearance between the valve plate and the plunger cylinder is too large, according to the existing design method, the residual compression force coefficient depends on the diameter of the plunger and the structural dimensions of a kidney-shaped hole of the valve plate, and the like, so that after elements such as a radial plunger pump and the like are shaped, the residual compression force coefficient cannot be changed, and the lubricating property of a valve pair and the overall efficiency of the elements such as the radial plunger pump and the like are seriously influenced.
Therefore, it is necessary to design a pressing force adjusting assembly of the plunger type hydraulic component to adjust the pressing force so as to prevent the disc from being burned due to excessive friction.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a pressing force adjusting assembly of a plunger type hydraulic element.
In order to achieve the purpose, the invention adopts the following technical scheme:
the pressing force adjusting assembly of the plunger type hydraulic element comprises a connecting shell and a piston rod, wherein the bottom of the connecting shell is rotatably connected with a first adjusting knob and a second adjusting knob, one end of the first adjusting knob is connected with a pressing force adjusting assembly through the connecting shell, one end of the second adjusting knob is connected with a balance adjusting assembly through the connecting shell, the top end of the pressing force adjusting assembly is connected with a contact base, the top end of the balance adjusting assembly is connected with the contact base, the top end of the contact base is connected with a contact element in a sliding mode, the top end of the contact element is connected with the bottom of the piston rod, connecting plates are fixedly arranged on two sides of the pressing force adjusting assembly, and two guide rods are fixedly arranged on the inner wall of the bottom of the connecting shell;
the pressing force adjusting assembly comprises a first rotating shaft, a first adjusting rod, a first rotating wheel, a ball and a connecting rod, the first rotating shaft is fixedly connected with a first adjusting knob through a connecting shell, the top end of the first rotating shaft is connected with the first rotating wheel, the first adjusting rod is positioned outside the first rotating wheel, the top end of the first adjusting rod is rotatably connected with the ball, the top end of the ball is fixedly provided with the connecting rod, and the top end of the connecting rod is fixedly connected with the contact base;
the balance adjusting assembly comprises a second rotating shaft, a second adjusting rod, a second rotating wheel, a first spring, a supporting rod and a positioning rod, the bottom of the second rotating shaft is fixedly connected with a second adjusting knob through a connecting shell, the top end of the second rotating shaft is fixedly provided with the second rotating wheel, the second adjusting rod is positioned outside the second rotating wheel, the top end of the second adjusting rod is fixedly provided with the first spring and the positioning rod, and the top end of the first spring is fixedly provided with the supporting rod;
the contact base is composed of a base, a fixed rod, a movable block and a second spring, two grooves are formed in the top end of the base, the fixed rod is fixedly installed in each groove, the movable block is fixedly installed on the outer side of each fixed rod, and the top end of the movable block is fixedly connected with the contact element.
Preferably, the number of the second adjusting knobs is four, the second adjusting knobs are arranged at the bottom of the connecting shell in an annular array manner, and the angles of the contact base and the contact piece can be changed by adjusting the length of the balance adjusting assembly, so that the piston rod can be kept in balance, and the deviation is prevented.
Preferably, the outer sides of the first adjusting knob and the second adjusting knob are marked with marks and are marked with scales, the bottom of the connecting shell is marked with marks corresponding to the first adjusting knob and the second adjusting knob, the rotating angle and the moving length of the pressing force adjusting assembly and the balance adjusting assembly can be judged according to the marks and the scales, and calculation is convenient.
Preferably, all set up the circular through-hole with the guide bar adaptation in the connecting plate, and the equal fixed mounting of one end of guide bar has first limiting plate, can lead to packing force adjusting part, prevents that packing force adjusting part from following first adjust knob synchronous revolution to avoid packing force adjusting part can't go up and down.
Preferably, the outer sides of the first rotating wheel and the second rotating wheel are designed in a threaded structure, threaded grooves matched with the first rotating wheel and the second rotating wheel are formed in the first adjusting rod and the second adjusting rod, the first adjusting rod and the first rotating wheel can be controlled to move through threads, and therefore the adjusting effect is achieved.
Preferably, the first spring sleeve is arranged outside the positioning rod, the second limiting plate is fixedly mounted at the top end of the positioning rod, a cavity matched with the second limiting plate is formed in the supporting rod, the top end of the supporting rod is designed to be in an arc-shaped structure, the contact base can be supported, and a certain buffering effect can be achieved.
Preferably, the inner wall of the bottom of the connecting shell is fixedly provided with a limiting rod, and the second adjusting rod is internally provided with a through hole matched with the limiting rod, so that the balance adjusting assembly can be controlled to ascend, and idling is prevented.
Preferably, the base is designed to be of a U-shaped structure, and the bottom of the contact piece is provided with a groove matched with the base, so that the contact piece can be guided and protected.
Preferably, a second spring is fixedly installed in the groove at the top end of the base, the second spring is sleeved on the outer side of the fixed rod, one end of the second spring is connected with the moving block, and the contact element can be always attached to the inner wall of the connecting shell through the elastic force of the second spring when the contact element inclines.
Preferably, connect the casing outside and be annular array and install four observation windows, and the observation window adopts transparent glass material to make, can follow the outside and observe connecting the casing inside to judge whether need adjust the work.
The pressing force adjusting assembly can be used for adjusting the heights of the contact base and the contact piece by matching with the first adjusting knob, the first rotating shaft and the first rotating wheel can be driven to rotate by the first adjusting knob, the first adjusting rod is controlled to vertically ascend by positioning the connecting plate and the guide rod, and the effect of adjusting the pressing force on the piston rod is achieved by adjusting the heights of the contact base and the contact piece;
the balance adjusting assembly can be used for adjusting the angles of the contact base and the contact element by matching with the second adjusting knob, when the contact element is abraded in long-term use to cause the inclination of the piston rod, the second adjusting knob can be used for controlling the second rotating shaft and the second rotating wheel to rotate, the limiting rod is used for enabling the second adjusting rod to ascend, and therefore the purpose of adjusting the angles of the contact base and the contact element is achieved, the supporting rod is contacted with the contact base and the purpose of buffering is achieved through the elastic force of the first spring, and the contact base can be always attached to the contact base;
the contact base and the contact element are in contact with the piston rod to generate pressing force, and when the contact base and the contact element are inclined, the fixed rod and the second spring can control the moving block and the contact element to move, so that the contact element can be always attached to the inner wall of the connecting shell and the outer end of the piston rod, and the balance of the piston rod is kept.
Drawings
FIG. 1 is a 3D view of a ram hydraulic component compression force adjustment assembly according to the present invention;
fig. 2 is a front view schematically showing a pressing force adjusting assembly of a plunger type hydraulic component according to the present invention;
FIG. 3 is a schematic bottom view of a ram hydraulic component clamping force adjustment assembly according to the present invention;
FIG. 4 is a schematic view of a press-fit sleeve assembly of the press-force adjustment assembly of the plunger-type hydraulic component according to the present invention;
FIG. 5 is a schematic view showing a structure of a balance adjustment assembly in a pressing force adjustment assembly of a plunger type hydraulic component according to the present invention;
FIG. 6 is a schematic view of a contact base in a pressing force adjusting assembly of a plunger-type hydraulic component according to the present invention;
fig. 7 is a front view of a contact base in a pressing force adjusting assembly of a plunger type hydraulic component according to the present invention.
In the figure: the device comprises a connecting shell 1, a piston rod 2, a first adjusting knob 3, a second adjusting knob 4, a pressing force adjusting assembly 5, a balance adjusting assembly 6, a contact base 7, a contact element 8, a connecting plate 9, a guide rod 10, a first limiting plate 11, an observation window 12, a first rotating shaft 51, a first adjusting rod 52, a first rotating wheel 53, a ball 54, a connecting rod 55, a second rotating shaft 61, a second adjusting rod 62, a second rotating wheel 63, a first spring 64, a supporting rod 65, a positioning rod 66, a second limiting plate 67, a limiting rod 68, a base 71, a fixing rod 72, a moving block 73 and a second spring 74.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example (b): referring to fig. 1-7, the pressing force adjusting assembly of the plunger type hydraulic component comprises a connecting shell 1 and a piston rod 2, the bottom of the connecting shell 1 is rotatably connected with a first adjusting knob 3 and a second adjusting knob 4, one end of the first adjusting knob 3 is connected with a pressing force adjusting assembly 5 through the connecting shell 1, one end of the second adjusting knob 4 is connected with a balance adjusting assembly 6 through the connecting shell 1, the top end of the pressing force adjusting assembly 5 is connected with a contact base 7, the top end of the balance adjusting assembly 6 is connected with the contact base 7, the top end of the contact base 7 is slidably connected with a contact element 8, the top end of the contact element 8 is connected with the bottom of the piston rod 2, connecting plates 9 are fixedly installed on two sides of the pressing force adjusting assembly 5, and two guide rods 10 are fixedly installed on the inner wall of the bottom of the connecting shell 1;
the pressing force adjusting assembly 5 comprises a first rotating shaft 51, a first adjusting rod 52, a first rotating wheel 53, a ball 54 and a connecting rod 55, the first rotating shaft 51 is fixedly connected with the first adjusting knob 3 through the connecting shell 1, the top end of the first rotating shaft 51 is connected with the first rotating wheel 53, the first adjusting rod 52 is positioned outside the first rotating wheel 53, the top end of the first adjusting rod 52 is rotatably connected with the ball 54, the top end of the ball 54 is fixedly provided with the connecting rod 55, and the top end of the connecting rod 55 is fixedly connected with the contact base 7;
the balance adjusting assembly 6 comprises a second rotating shaft 61, a second adjusting rod 62, a second rotating wheel 63, a first spring 64, a supporting rod 65 and a positioning rod 66, the bottom of the second rotating shaft 61 is fixedly connected with the second adjusting knob 4 through the connecting shell 1, the top end of the second rotating shaft 61 is fixedly provided with the second rotating wheel 63, the second adjusting rod 62 is positioned outside the second rotating wheel 63, the top end of the second adjusting rod 62 is fixedly provided with the first spring 64 and the positioning rod 66, and the top end of the first spring 64 is fixedly provided with the supporting rod 65;
the contact base 7 is composed of a base 71, a fixed rod 72, a moving block 73 and a second spring 74, two grooves are formed in the top end of the base 71, the fixed rod 72 is fixedly installed in each groove, the moving block 73 is fixedly installed on the outer side of each fixed rod 72, and the top end of each moving block 73 is fixedly connected with the contact element 8.
Furthermore, the number of the second adjusting knobs 4 is four, and the second adjusting knobs are arranged at the bottom of the connecting shell 1 in an annular array manner, so that the angles of the contact base 7 and the contact element 8 can be changed by adjusting the length of the balance adjusting assembly 6, and the piston rod 2 can be kept in balance to prevent deviation.
Furthermore, marks are marked on the outer sides of the first adjusting knob 3 and the second adjusting knob 4 and are marked with scales, marks corresponding to the first adjusting knob 3 and the second adjusting knob 4 are marked at the bottom of the connecting shell 1, and the rotating angle, the moving length of the pressing force adjusting assembly 5 and the moving length of the balance adjusting assembly 6 can be judged according to the marks and the scales, so that calculation is convenient.
Further, all set up the circular through-hole with guide bar 10 adaptation in the connecting plate 9, and the equal fixed mounting of one end of guide bar 10 has first limiting plate 11, can lead to pressing force adjusting part 5, prevents that pressing force adjusting part 5 from following first adjust knob 3 synchronous revolution to avoid pressing force adjusting part 5 can not go up and down.
Furthermore, the outer sides of the first rotating wheel 53 and the second rotating wheel 63 are both designed by adopting a thread structure, and threaded grooves matched with the first rotating wheel 53 and the second rotating wheel 63 are formed in the first adjusting rod 52 and the second adjusting rod 62, so that the first adjusting rod 52 and the first rotating wheel 53 can be controlled to move through threads, and the adjusting effect is achieved.
Further, first spring 64 cover is established in the locating lever 66 outside, and locating lever 66 top fixed mounting has second limiting plate 67, sets up the cavity with second limiting plate 67 adaptation in the bracing piece 65, and the bracing piece 65 top adopts the arc structural design, both can support contact base 7, but also can play certain cushioning effect.
Furthermore, the inner wall of the bottom of the connecting shell 1 is fixedly provided with a limiting rod 68, and a through hole matched with the limiting rod 68 is formed in the second adjusting rod 62, so that the balance adjusting assembly 6 can be controlled to ascend, and idling is prevented.
Furthermore, the base 71 is designed to be of a U-shaped structure, and the bottom of the contact element 8 is provided with a groove matched with the base 71, so that the contact element 8 can be guided and protected.
Furthermore, a second spring 74 is fixedly installed in a groove at the top end of the base 71, the second spring 74 is sleeved outside the fixing rod 72, one end of the second spring 74 is connected with the moving block 73, and the contact element 8 can be always attached to the inner wall of the connecting shell 1 through the elastic force of the second spring 74 when the contact element 8 inclines.
Further, connect the casing 1 outside and be four observation windows 12 installed in annular array, and observation window 12 adopts transparent glass material to make, can follow the outside and observe connecting casing 1 inside to judge whether need adjust work.
The working principle is as follows: when the pressing force of the piston rod 2 needs to be adjusted, the first adjusting knob 3 needs to be rotated, the thread structure of the first rotating wheel 53 is used for controlling the first adjusting rod 52 to vertically move downwards, so that the contact base 7 and the contact element 8 are controlled to descend, and meanwhile, the supporting rod 65 can be always attached to the bottom of the contact base 7 by the elastic force of the first spring 64 for supporting, so that obstruction is avoided;
when the contact element 8 is worn to incline the piston rod 2, the inclination direction can be observed through the observation window 12, the second adjusting knob 4 corresponding to the direction is rotated, the second adjusting rod 62 is controlled to ascend by utilizing the thread structure of the second rotating wheel 63 and the limiting rod 68, the contact element 8 is inclined, so that the piston rod 2 is kept balanced, when the contact element 8 inclines, the contact element 8 is controlled to move by utilizing the elastic force of the second spring 74, and is enabled to be tightly attached to the inner wall of the connecting shell 1 and the outer end of the bottom of the piston rod 2 for supporting, so that the balance adjusting effect is achieved.
Those not described in detail in this specification are well within the skill of the art.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The pressing force adjusting assembly of the plunger type hydraulic element comprises a connecting shell (1) and a piston rod (2), and is characterized in that the bottom of the connecting shell (1) is rotatably connected with a first adjusting knob (3) and a second adjusting knob (4), one end of the first adjusting knob (3) is connected with a pressing force adjusting assembly (5) through the connecting shell (1), one end of the second adjusting knob (4) is connected with a balance adjusting assembly (6) through the connecting shell (1), the top end of the pressing force adjusting assembly (5) is connected with a contact base (7), the top end of the balance adjusting assembly (6) is connected with the contact base (7), the top end of the contact base (7) is slidably connected with a contact element (8), the top end of the contact element (8) is connected with the bottom of the piston rod (2), connecting plates (9) are fixedly arranged on two sides of the pressing force adjusting assembly (5), and two guide rods (10) are fixedly arranged on the inner wall of the bottom of the connecting shell (1);
the pressing force adjusting assembly (5) comprises a first rotating shaft (51), a first adjusting rod (52), a first rotating wheel (53), balls (54) and a connecting rod (55), the first rotating shaft (51) is fixedly connected with a first adjusting knob (3) through a connecting shell (1), the top end of the first rotating shaft (51) is connected with the first rotating wheel (53), the first adjusting rod (52) is located on the outer side of the first rotating wheel (53), the top end of the first adjusting rod (52) is rotatably connected with the balls (54), the top end of the balls (54) is fixedly provided with the connecting rod (55), and the top end of the connecting rod (55) is fixedly connected with a contact base (7);
the balance adjusting assembly (6) comprises a second rotating shaft (61), a second adjusting rod (62), a second rotating wheel (63), a first spring (64), a supporting rod (65) and a positioning rod (66), the bottom of the second rotating shaft (61) is fixedly connected with a second adjusting knob (4) through a connecting shell (1), the top end of the second rotating shaft (61) is fixedly provided with the second rotating wheel (63), the second adjusting rod (62) is positioned on the outer side of the second rotating wheel (63), the top end of the second adjusting rod (62) is fixedly provided with the first spring (64) and the positioning rod (66), and the top end of the first spring (64) is fixedly provided with the supporting rod (65);
the contact base (7) is composed of a base (71), a fixing rod (72), a moving block (73) and a second spring (74), two grooves are formed in the top end of the base (71), the fixing rod (72) is fixedly installed in each groove, the moving block (73) is fixedly installed on the outer side of each fixing rod (72), and the top end of each moving block (73) is fixedly connected with the corresponding contact element (8).
2. The plunger-type hydraulic component packing force adjustment assembly according to claim 1, characterized in that the second adjustment knobs (4) are four in number and are mounted in an annular array at the bottom of the connection housing (1).
3. The plunger-type hydraulic component plunger-type plunger-force adjustment assembly according to claim 1, characterized in that the first and second adjustment knobs (3, 4) are marked and graduated on the outside and the connection housing (1) is marked with corresponding markings on the bottom of the first and second adjustment knobs (3, 4).
4. The pressing force adjusting assembly of a plunger type hydraulic component as claimed in claim 1, wherein circular through holes matched with the guide rods (10) are formed in the connecting plates (9), and a first limiting plate (11) is fixedly mounted at one end of each guide rod (10).
5. The ram-type hydraulic component pressing force adjusting assembly as recited in claim 1, characterized in that the outer sides of the first rotating wheel (53) and the second rotating wheel (63) are both designed by adopting a thread structure, and the first adjusting rod (52) and the second adjusting rod (62) are both provided with a thread groove which is matched with the first rotating wheel (53) and the second rotating wheel (63).
6. The pressing force adjusting assembly of a plunger type hydraulic component as set forth in claim 1, wherein the first spring (64) is sleeved outside the positioning rod (66), a second limiting plate (67) is fixedly mounted at the top end of the positioning rod (66), a cavity adapted to the second limiting plate (67) is formed in the support rod (65), and the top end of the support rod (65) is designed to have an arc-shaped structure.
7. The ram-type hydraulic component packing force adjustment assembly as set forth in claim 5, characterized in that a limiting rod (68) is fixedly mounted on the inner wall of the bottom of the connecting housing (1), and a through hole adapted to the limiting rod (68) is formed in the second adjustment rod (62).
8. The plunger-type hydraulic component pressing force adjusting assembly as recited in claim 1, characterized in that the base (71) is designed in a U-shaped structure, and the bottom of the contact member (8) is provided with a groove matched with the base (71).
9. The plunger-type hydraulic component pressing force adjusting assembly as set forth in claim 1, characterized in that a second spring (74) is fixedly installed in a groove at the top end of the base (71), the second spring (74) is sleeved outside the fixed rod (72), and one end of the second spring (74) is connected with the movable block (73).
10. The plunger-type hydraulic component packing force adjustment assembly according to claim 1, characterized in that four observation windows (12) are installed in a circular array on the outside of the connection housing (1), and the observation windows (12) are made of a transparent glass material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111643488.6A CN114321085B (en) | 2021-12-30 | 2021-12-30 | Pressing force adjusting assembly of plunger type hydraulic element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111643488.6A CN114321085B (en) | 2021-12-30 | 2021-12-30 | Pressing force adjusting assembly of plunger type hydraulic element |
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| Publication Number | Publication Date |
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| CN114321085A CN114321085A (en) | 2022-04-12 |
| CN114321085B true CN114321085B (en) | 2023-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111643488.6A Active CN114321085B (en) | 2021-12-30 | 2021-12-30 | Pressing force adjusting assembly of plunger type hydraulic element |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3627067A1 (en) * | 1986-08-09 | 1988-02-11 | Heringer & Schipper Gmbh | Compensating jaw for clamping devices |
| US4750870A (en) * | 1987-02-13 | 1988-06-14 | Mechanical Technology Incorporated | Pressure actuated movable head for a resonant reciprocating compressor balance chamber |
| JP2010137318A (en) * | 2008-12-10 | 2010-06-24 | Niigata Machine Techno Co Ltd | Apparatus and method for adjusting pressure fluctuation of machine tool |
| CN211852317U (en) * | 2020-03-31 | 2020-11-03 | 天津市奥其蓄能器有限公司 | Novel pressure regulating device of diaphragm type energy accumulator |
| CN214639689U (en) * | 2021-04-09 | 2021-11-09 | 广东凯达兴塑胶模具有限公司 | Quick adjustable supporting device for die balance |
| CN214734075U (en) * | 2021-05-17 | 2021-11-16 | 无锡市思进工业自动化设备有限公司 | Jacking jack device |
-
2021
- 2021-12-30 CN CN202111643488.6A patent/CN114321085B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3627067A1 (en) * | 1986-08-09 | 1988-02-11 | Heringer & Schipper Gmbh | Compensating jaw for clamping devices |
| US4750870A (en) * | 1987-02-13 | 1988-06-14 | Mechanical Technology Incorporated | Pressure actuated movable head for a resonant reciprocating compressor balance chamber |
| JP2010137318A (en) * | 2008-12-10 | 2010-06-24 | Niigata Machine Techno Co Ltd | Apparatus and method for adjusting pressure fluctuation of machine tool |
| CN211852317U (en) * | 2020-03-31 | 2020-11-03 | 天津市奥其蓄能器有限公司 | Novel pressure regulating device of diaphragm type energy accumulator |
| CN214639689U (en) * | 2021-04-09 | 2021-11-09 | 广东凯达兴塑胶模具有限公司 | Quick adjustable supporting device for die balance |
| CN214734075U (en) * | 2021-05-17 | 2021-11-16 | 无锡市思进工业自动化设备有限公司 | Jacking jack device |
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| CN114321085A (en) | 2022-04-12 |
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Effective date of registration: 20221124 Address after: 214500 No. 3, liuzhugang Road, Xingang Park, Jingjiang Economic Development Zone, Taizhou City, Jiangsu Province Applicant after: Jingjiang Aiwei machinery parts manufacturing Co.,Ltd. Address before: 214500 No. 23 Dajue North Road, Xieqiao Town, Jingjiang City, Taizhou City, Jiangsu Province Applicant before: Jingjiang Nanzheng Machinery Technology Co.,Ltd. |
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