CN212091742U - Gear proportional valve - Google Patents
Gear proportional valve Download PDFInfo
- Publication number
- CN212091742U CN212091742U CN202020513050.0U CN202020513050U CN212091742U CN 212091742 U CN212091742 U CN 212091742U CN 202020513050 U CN202020513050 U CN 202020513050U CN 212091742 U CN212091742 U CN 212091742U
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- gear
- proportioning
- gear box
- transmission
- transmission shaft
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- 239000003292 glue Substances 0.000 claims abstract description 69
- 230000005540 biological transmission Effects 0.000 claims description 90
- 238000007789 sealing Methods 0.000 claims description 17
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 5
- 239000000084 colloidal system Substances 0.000 abstract description 3
- 239000004615 ingredient Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 12
- 230000008901 benefit Effects 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model provides a gear proportional valve relates to the colloid ratio field of mixing. The gear proportional valve comprises a gear box cover, a gear box, a first proportioning gear, a second proportioning gear and a rotary power source. The first proportioning gear and the second proportioning gear are meshed and connected and are loaded in the containing space formed by tightly jointing the gear box and the gear box cover. The rotary power source drives the first proportioning gear to rotate. The two end faces of the first proportioning gear and the two end faces of the second proportioning gear are tightly jointed with the inner bottom face of the gear box and the gear box cover. The side wall of the gear box is provided with a first glue inlet, a second glue inlet and a glue outlet. The two components of the glue are respectively fed into the gear box through the first glue inlet and the second glue inlet, and are discharged from the glue outlet after being mixed. The utility model discloses a pair of intermeshing's ratio gear, and only need a power supply can drive two ratio gear rotation and carry out the ratio of two ingredient colloids, its overall structure is simple, and the routine maintenance is convenient.
Description
Technical Field
The utility model relates to a colloid ratio mixes the field, especially relates to a gear proportional valve.
Background
Although the patent CN 103657964a utilizes a gear pump to perform the proportioning glue supply of the two-component liquid, the design needs two servo motors to drive the two gear pumps respectively, and the proportioning glue supply with different proportions can only be realized by changing the proportioning ratios of the two servo motors. In the in-service use, because need two gear pumps and servo motor, this design occupation workspace is great, and use cost is higher, and washs comparatively troublesome, causes economic benefits low scheduling phenomenon easily, only is applicable to some specific fields.
The existing double-component liquid proportioning glue supply system mainly has the following defects: the existing system utilizes two gear pumps to realize the transmission of two-component liquid, and two servo motors are needed in the working process, so that the cost is increased to a certain extent, and the occupied working space is larger; the proportioning glue supply system realizes glue supply of two-component liquid in different proportions by adjusting the rotating speed of the servo motor, and during proportioning, the rotation speed error between the two motors inevitably exists, so that high-precision proportioning cannot be realized; thirdly, in order to better ensure the proportion of the existing two-component proportion glue supply system, two gear pumps need to be kept in a low-speed running state even when not working, so that the abrasion of gears and related parts is accelerated to a great extent, and the service life is short; 4. the system has more core parts, increases the difficulty of daily cleaning and maintenance in the use process, and greatly reduces the working efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problems that the existing double-component liquid proportioning glue supply system needs two power sources and has high cost, low precision and difficult routine maintenance. The utility model provides an adopt a power supply, a set of reference circle is direct, the base circle diameter, the addendum circle is direct, the dedendum circle diameter, tooth number and modulus all equal but the gear of tooth thickness difference realize the ratio as required of bi-component liquid, the volume ratio decision in single sealed chamber that its ratio proportion mainly comprises adjacent two teeth and the gear box inner wall of every gear (supposing that the cavity volume that two adjacent teeth of ratio gear 1 and gear box inner wall formed is a, the cavity volume that ratio gear 2 and gear box inner wall formed is b, then its ratio proportion is a b). The specific scheme is as follows.
The utility model provides a gear proportional valve, include: the gear box comprises a gear box cover, a gear box, a first proportioning gear, a second proportioning gear and a rotary power source;
the first proportioning gear and the second proportioning gear are meshed and connected and are loaded in an accommodating space formed by tightly jointing the gear box and the gear box cover; the two end faces of the first proportioning gear and the two end faces of the second proportioning gear are tightly jointed with the inner bottom face of the gear box and the gear box cover; the inner side wall of the gear box is engaged with the partial tooth circumference of the first proportioning gear and the partial tooth circumference of the second proportioning gear;
after the first proportioning gear and the second proportioning gear are loaded in the accommodating space, the meshing part of the first proportioning gear and the second proportioning gear divides the remaining accommodating space into a space before meshing and a space after meshing;
the rotary power source penetrates through the bottom of the gear box and is fixedly connected to the axis of the first proportioning gear so as to drive the first proportioning gear to rotate;
a first glue inlet, a second glue inlet and a glue outlet are formed in the side wall of the gear box; the first glue inlet is communicated with the joint of the gear periphery of the first proportioning gear and the gear box; the second glue inlet is communicated with the joint of the gear periphery of the second proportioning gear and the gear box; the glue outlet is communicated with the space before engagement.
Preferably, the gear box is further provided with a residual glue collecting port, and the residual glue collecting port is communicated with the space after meshing.
Preferably, the tooth root circle diameter, the base circle diameter, the reference circle diameter, the tooth top circle diameter, the modulus and the number of teeth of the first proportioning gear and the second proportioning gear are equal, and the tooth thicknesses are not equal.
Preferably, a first sealing ring is arranged between the upper end surface of the first proportioning gear and the gear box cover; a second sealing ring is arranged between the upper end face of the second proportioning gear and the gear box cover; a third sealing ring is arranged between the lower end face of the first proportioning gear and the gear box; and a fourth sealing ring is arranged between the lower end surface of the second proportioning gear and the gear box.
Preferably, the rotary power source comprises a servo motor, a coupling and a first transmission shaft; the coupler is connected with an output shaft of the servo motor and the first transmission shaft; the first transmission shaft sequentially penetrates through the bottom of the gear box in the upward direction, penetrates through and is fixedly connected with the axle center of the first proportioning gear, and the upper end of the first transmission shaft is rotatably inserted into the gear box cover.
Preferably, the gear proportional valve is further provided with a motor fixing plate, a transmission gear fixing plate and a fixing rod; the fixed rod penetrates through and is fixedly connected with the transmission gear fixing plate, the lower end of the fixed rod is fixed on the motor fixing plate, and the upper end of the fixed rod is fixed on the outer bottom surface of the gear box; the servo motor is fixed on the lower surface of the motor fixing plate, and an output shaft of the servo motor penetrates through the motor fixing plate in a non-contact manner; the first transmission shaft can also rotatably penetrate through the transmission gear fixing plate before the first transmission shaft can upwardly and rotatably penetrate through the bottom of the gear box.
Preferably, the gear proportional valve is further provided with a first transmission gear and a second transmission gear which are identical in shape and size; the first transmission gear is meshed with the second transmission gear and is arranged between the gear box and the transmission gear fixing plate; the first transmission shaft also penetrates through and is fixed at the axis of the first transmission gear; the gear proportional valve is also provided with a second transmission shaft, the lower end of the second transmission shaft is rotatably inserted into the transmission gear fixing plate, the other end of the second transmission shaft upwards sequentially penetrates through and is fixedly connected with the axle center of the second transmission gear, the second transmission shaft rotatably penetrates through the bottom of the gear box and penetrates through and is fixedly connected with the axle center of the second proportioning gear, and the upper end of the second proportioning gear is rotatably inserted into the gear box cover.
Preferably, the first transmission shaft is rotatably connected with the transmission gear fixing plate, the gear box and the gear box cover through bearings respectively; the second transmission shaft is respectively connected with the transmission gear fixing plate, the gear box and the gear box cover in a rotatable mode through bearings.
The utility model has the advantages that: a pair of matching gears which are meshed with each other is adopted, and the double matching gears can be driven to rotate only by a single power source to match, mix and convey the double-component liquid, so that the matching precision is high, and the working efficiency is improved; the whole structure is simple, the daily maintenance, the disassembly, the assembly and the cleaning are convenient, the investment of a front glue supply system can be reduced to a certain extent, the equipment cost is saved, and the economic benefit is improved; the gear proportional valve can meet the glue preparation requirements of different proportions by replacing the proportioning gears with different tooth thicknesses, has low requirements on the conditions of viscosity, working pressure, temperature and the like of two-component liquid, is suitable for various occasions, and particularly has obvious advantages in the field of high viscosity of the two-component liquid.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required for the embodiments will be briefly described below, and obviously, the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of an external overall structure of a gear proportional valve provided by an embodiment of the present invention;
fig. 2 is a schematic structural view of a meshing connection of double-proportioning gears provided by the embodiment of the present invention;
FIG. 3 is an internal cross-sectional view of a gear proportional valve provided by an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a seal ring according to an embodiment of the present invention;
fig. 5 is an external oblique view of a gear proportional valve provided by an embodiment of the present invention;
fig. 6 is a schematic structural view of a glue inlet, a glue outlet and a residual glue collecting opening provided on a gear box according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Examples
As shown in fig. 1 and 2, the utility model provides a gear proportional valve for ratio glue two components to mix and export glue. The gear proportional valve comprises: gear box lid 1, gear box 7, first ratio gear 23, second ratio gear 24 and rotary power source. The rotary power source drives the first proportioning gear 23 to rotate.
The first matching gear 23 and the second matching gear 24 are engaged and connected, and are loaded in the accommodating space where the gear box 7 and the gear box cover 1 are tightly jointed. The gear box 7 is connected with the gear box cover 1 in a seamless mode and fixed through bolts. The two end faces of the first proportioning gear 23 are tightly jointed with the inner bottom face of the gear box 7 and the gear box cover 1. The two end faces of the second matching gear 24 are also tightly jointed with the inner bottom face of the gear box 7 and the gear box cover 1.
As shown in fig. 3, specifically: a first sealing ring 19 is arranged between the upper end surface of the first proportioning gear and the gear box cover; a second sealing ring 20 is arranged between the upper end face of the second proportioning gear and the gear box cover; a third sealing ring 21 is arranged between the lower end face of the first proportioning gear and the gear box; a fourth sealing ring 22 is arranged between the lower end surface of the second proportioning gear and the gear box.
Fig. 4 is a schematic diagram of the shape of the sealing ring in an embodiment, and the four sealing rings are the same in shape and are all circular rings. The first proportioning gear 23 and the second proportioning gear 24 are respectively and tightly connected with the gear box 7 and the gear box cover 1 through sealing rings, so that glue in the gear box cannot penetrate into the axis of the gear, and further cannot penetrate out of the gear box 7.
With reference to fig. 2, the inner side wall of the gear box 7 is cut into a part of the circumference of the first proportioning gear 23 and a part of the circumference of the second proportioning gear 24. After the first proportioning gear 23 and the second proportioning gear 24 are loaded in the accommodating space, the remaining accommodating space is divided into a space before meshing 12 and a space after meshing 30 by the meshing part of the first proportioning gear 23 and the second proportioning gear 24.
As shown in fig. 5 and 6, a first glue inlet 5, a second glue inlet 6 and a glue outlet 2 are formed in the side wall of the gear box 7. Referring to fig. 2, the first glue inlet 5 is connected to the engagement portion of the gear box 7 and the gear periphery of the first proportioning gear 23. The second glue inlet 6 is communicated with the gear box 7 at the joint of the gear periphery of the second proportioning gear 24. The glue outlet 2 is communicated with the space 12 before meshing.
Further, in a preferred embodiment, the gear box 7 is further provided with a residual glue collecting port 16, and the residual glue collecting port 16 is communicated with the space 30 after meshing. When the two proportioning gears are meshed, a small closed space is formed between the tooth of one gear and the tooth groove of the other gear, so that a small part of mixed glue is conveyed to the space 30 after meshing. Therefore, the residual glue collecting port 16 can be arranged at the position for collecting the residual glue amount, and the residual glue amount can be directly used for production operation after a certain amount of residual glue is collected, so that the waste of glue is reduced.
In one preferred embodiment, the root circle diameter, base circle diameter, pitch circle diameter, addendum circle diameter, module, pitch, and number of teeth of the first ratio gear 23 and the second ratio gear 24 are all equal, but the tooth thicknesses are not equal. And the two matching gears have the same height. The proportion of the two components of the glue is determined according to the tooth thickness. In other embodiments, the proportion of the two components of the glue can be adjusted by replacing proportion gears with different tooth thicknesses.
The rotary power source comprises a servo motor 15, a coupling 11 and a first transmission shaft 8. The servomotor 15 has an output shaft 13, and the coupling 11 connects the output shaft 13 of the servomotor 15 and the first transmission shaft 8.
The first transmission shaft 8 sequentially and rotatably penetrates through the bottom of the gear box 7 upwards, penetrates through and is fixedly connected with the axle center of the first proportioning gear 23 to drive the first proportioning gear 23 to rotate, and the upper end of the first transmission shaft is rotatably inserted into the gear box cover 1.
When the gear proportional valve operates, the glue A component enters from the first glue inlet 5, and the glue B component enters from the second glue inlet 6. The servo motor 15 drives the first transmission shaft 8 to rotate, so as to drive the first proportioning gear 23 to rotate, and the first proportioning gear 23 drives the second proportioning gear 24 to rotate reversely through meshing. The rotation speed of the servo motor 15 can be set to about 1r/s by reference, and the present invention is not limited in particular. The glue A component fills one tooth groove of the first proportioning gear 23, and the glue B component fills one tooth groove of the second proportioning gear 24. Assuming that the volume of the cavity formed by the two adjacent teeth of the first proportioning gear 23 and the inner wall of the gear box is a, and the volume of the cavity formed by the two adjacent teeth of the second proportioning gear 24 and the inner wall of the gear box is b, the proportioning ratio of the two components of the glue is a: b. the glue a component and the glue B component are mixed in the pre-engagement space 12 and discharged through the glue outlet 2. The proportion of the two components of the glue can be adjusted by replacing the proportion gears with different tooth thicknesses according to actual use requirements.
With continuing reference to fig. 1 and 5, further, in a preferred embodiment, the gear proportional valve is further provided with a first transmission gear 3 and a second transmission gear 4 which are identical in shape and size, a motor fixing plate 14, a transmission gear fixing plate 9 and four fixing rods 10. Four fixed rods 10 respectively penetrate through and are fixedly connected with four corners of the transmission gear fixing plate 9, the lower end of each fixed rod 10 is respectively fixed at four corners of the motor fixing plate 14, and the upper end of each fixed rod is fixed at four corners of the outer bottom surface of the gear box 7. The first transmission gear 3 is meshed with the second transmission gear 4 and is arranged between the gear box 7 and the transmission gear fixing plate 9.
The servo motor 15 is fixed on the lower surface of the motor fixing plate 14, the output shaft 13 of the servo motor penetrates through the motor fixing plate 14 without contact, and the coupler 11 is arranged between the motor fixing plate 14 and the transmission gear fixing plate 9. Before the first transmission shaft 8 upwards rotatably penetrates through the bottom of the gear box 7, the first transmission shaft sequentially and rotatably penetrates through the transmission gear fixing plate 9 and penetrates through and is fixedly connected with the axle center of the first transmission gear 3. The first transmission gear 3 and the first proportioning gear 23 are respectively fixed to the first transmission shaft 8 and driven by the servo motor 15 to rotate in the same speed and direction. The first transmission shaft 8 also passes through the centers of the first sealing ring 19 and the third sealing ring 21, respectively, so that glue cannot seep onto the first transmission shaft 8 and overflow out of the box.
Referring to fig. 3, the gear ratio valve further has a second transmission shaft 29, the lower end of which is rotatably inserted into the transmission gear fixing plate 9, the other end of which is upwardly and sequentially passed through and fixedly connected to the axis of the second transmission gear 4, the bottom of the gear box 7, and the axis of the second proportioning gear 24, and the upper end of which is rotatably inserted into the gear box cover 1. This design enables the second transmission gear 4 and the second proportioning gear 24 to be braked against each other by being fixed to the second transmission shaft 29. The second drive shaft 29 also passes through the centers of the second seal ring 20 and the fourth seal ring 22, respectively, so that glue does not seep onto the second drive shaft 29 and spill out of the cartridge.
With reference to fig. 3, in a preferred embodiment, six joints between the first transmission shaft 8 and the second transmission shaft 29, and the transmission gear fixing plate 9, the gear box 7 and the gear box cover 1 are rotatably connected through bearings. The method specifically comprises the following steps: the first transmission shaft 8 and the gear box cover 1 are rotatably connected through a first bearing 17; the second transmission shaft 29 is rotatably connected with the gearbox cover 1 through a second bearing 18; the first transmission shaft 8 and the gear box 7 are rotatably connected through a third bearing 25; the second transmission shaft 29 is rotatably connected with the gear box 7 through a fourth bearing 26; the first transmission shaft 8 and the transmission gear fixing plate 9 are rotatably connected through a fifth bearing 27; the second transmission shaft 29 is rotatably connected with the transmission gear fixing plate 9 through a sixth bearing 28. Through the bearing connection, the transmission shaft and the gear run smoothly, the abrasion of parts is small, and the service life is long.
Set up identical and intermeshing's first drive gear 3 and second drive gear 4, its meshing rotation is comparatively accurate stable, can stabilize the meshing rotation mechanism of first ratio gear 23 and second ratio gear 24 for the ratio precision is higher.
In summary, the utility model adopts a pair of matching gears meshed with each other, and only one servo motor is needed to drive the double matching gears to rotate to match, mix and convey the double-component liquid, so that the matching precision is high, and the working efficiency is improved; the whole structure is simple, the daily maintenance, the disassembly, the assembly and the cleaning are convenient, the investment of a front glue supply system can be reduced to a certain extent, the equipment cost is saved, and the economic benefit is improved; the gear proportional valve can also replace proportioning gears with different tooth thicknesses to meet the glue proportioning requirements of different proportions, has low requirements on the conditions of viscosity, working pressure, temperature and the like of two-component liquid, is suitable for various occasions, and particularly has obvious advantages in the field of high viscosity of the two-component liquid.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (8)
1. A geared proportional valve, comprising: the gear box comprises a gear box cover (1), a gear box (7), a first proportioning gear (23), a second proportioning gear (24) and a rotary power source;
the first proportioning gear (23) and the second proportioning gear (24) are meshed and connected and are loaded in an accommodating space where the gear box (7) and the gear box cover (1) are tightly connected; two end faces of the first proportioning gear (23) and two end faces of the second proportioning gear (24) are tightly jointed with the inner bottom face of the gear box (7) and the gear box cover (1); the inner side wall of the gear box (7) is engaged with a part of the tooth circumference of the first proportioning gear (23) and a part of the tooth circumference of the second proportioning gear (24);
after the accommodating space is loaded with the first proportioning gear (23) and the second proportioning gear (24), the meshing part of the first proportioning gear (23) and the second proportioning gear (24) divides the rest accommodating space into a space before meshing (12) and a space after meshing (30);
the rotary power source penetrates through the bottom of the gear box (7) and is fixedly connected to the axis of the first proportioning gear (23) so as to drive the first proportioning gear (23) to rotate;
a first glue inlet (5), a second glue inlet (6) and a glue outlet (2) are formed in the side wall of the gear box (7); the first glue inlet (5) is communicated with the joint of the gear periphery of the first proportioning gear (23) and the gear box (7); the second glue inlet (6) is communicated with the joint of the gear periphery of the second proportioning gear (24) and the gear box (7); the glue outlet (2) is communicated with the space (12) before engagement.
2. The gear proportional valve according to claim 1, wherein a residual glue collecting port (16) is further formed in a side wall of the gear box (7), and the residual glue collecting port (16) is communicated with the meshing rear space (30).
3. The geared proportional valve of claim 1, wherein the first ratio gear and the second ratio gear have equal root diameter, base diameter, pitch diameter, tip diameter, module and number of teeth, and unequal tooth thicknesses.
4. The gear ratio valve according to claim 1, characterized in that a first sealing ring (19) is arranged between the upper end face of the first proportioning gear and the gearbox cover; a second sealing ring (20) is arranged between the upper end face of the second proportioning gear and the gear box cover; a third sealing ring (21) is arranged between the lower end face of the first proportioning gear and the gear box; and a fourth sealing ring (22) is arranged between the lower end face of the second proportioning gear and the gear box.
5. Gear ratio valve according to claim 1, characterized in that the source of rotational power comprises a servomotor (15), a coupling (11) and a first transmission shaft (8); the coupler (11) is connected with an output shaft (13) of the servo motor (15) at the lower end and the first transmission shaft (8) at the upper end;
first transmission shaft (8) upwards in proper order rotatable pass gear box (7) bottom passes and fixed connection the axle center department of first ratio gear (23), the rotatable insertion in upper end of first transmission shaft (8) in gear box lid (1).
6. The gear ratio valve according to claim 5, characterized in that it is further provided with a motor fixing plate (14), a transmission gear fixing plate (9) and a fixing rod (10); the fixed rod (10) penetrates through and is fixedly connected with the transmission gear fixing plate (9), the lower end of the fixed rod is fixed on the motor fixing plate (14), and the upper end of the fixed rod is fixed on the outer bottom surface of the gear box (7);
the servo motor (15) is fixed on the lower surface of the motor fixing plate (14), and an output shaft (13) of the servo motor penetrates through the motor fixing plate (14) in a non-contact manner; the first transmission shaft (8) can also rotatably penetrate through the transmission gear fixing plate (9) before the first transmission shaft can rotatably penetrate through the bottom of the gear box (7) upwards.
7. The gear ratio valve according to claim 6, characterized in that it is further provided with a first transmission gear (3) and a second transmission gear (4) of the same shape and size; the first transmission gear (3) is meshed with the second transmission gear (4) and is arranged between the gear box (7) and the transmission gear fixing plate (9);
the first transmission shaft (8) also penetrates through and fixes the axis of the first transmission gear (3);
the gear proportional valve is further provided with a second transmission shaft (29), the lower end of the second transmission shaft is rotatably inserted into the transmission gear fixing plate (9), the other end of the second transmission shaft upwards sequentially penetrates through and is fixedly connected with the axis of the second transmission gear (4), the bottom of the gear box (7) and the axis of the second proportioning gear (24), and the upper end of the second transmission shaft is rotatably inserted into the gear box cover (1).
8. The gear ratio valve of claim 7 wherein: the first transmission shaft (8) and the second transmission shaft (29) are respectively rotatably connected with the transmission gear fixing plate (9), the gear box (7) and the gear box cover (1) through bearings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020513050.0U CN212091742U (en) | 2020-04-09 | 2020-04-09 | Gear proportional valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020513050.0U CN212091742U (en) | 2020-04-09 | 2020-04-09 | Gear proportional valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212091742U true CN212091742U (en) | 2020-12-08 |
Family
ID=73629996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020513050.0U Expired - Fee Related CN212091742U (en) | 2020-04-09 | 2020-04-09 | Gear proportional valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212091742U (en) |
-
2020
- 2020-04-09 CN CN202020513050.0U patent/CN212091742U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201208 |