CN208153751U - A kind of motor-driven valve - Google Patents

Abstract

A kind of motor-driven valve, externally threaded item is by being threadedly engaged in the internal thread hole for being threaded onto interior threaded part, internal thread hole is pierced by the top of externally threaded item, externally threaded item is provided with spool pilot hole, spool is threaded onto spool pilot hole, and externally threaded item is divided into two sections, including external thread section and rotor linkage section, rotor linkage section be in hollow cavity and bottom opening it is semicylinder shape, the top of the hollow cavity of rotor linkage section is fixed at the top of external thread section；Motor-driven valve further includes external screw thread seat, and external screw thread seat is symmetrical set with rotor linkage section, and rotor linkage section and external screw thread seat cooperatively form cylindrical body, and cylinder engagement is threaded onto the central through hole of rotor.The utility model guarantees to be easier with existing assembly method outer by the cooperation of semicolumn positioning region, externally threaded item ensure that external screw thread and guide section are complete, reduce the internal screw thread and externally threaded frictional resistance of interior threaded part, and improves and screw togather precision and guiding accuracy.

Description

A kind of motor-driven valve

Technical field

The utility model belongs to motor-driven valve technical field, especially related with a kind of motor-driven valve.

Background technique

Patent publication No. discloses a kind of for adjusting the motor-driven valve of fluid flow, valve seat and adapter tube for CN202992195U Welding forms valve component, externally threaded item and valve component integrated injection molding.Interior threaded part（With rotor integration knot Structure）It is split into two halves from center, injection molding forms two half-threads respectively, is then combined with to form a whole internal screw thread, threaded component Spring accommodating chamber and needle installation and positioning structure are yet formed after merging.Although the technology reduces the components of motor-driven valve, but It is that interior threaded part is divided into two parts, merges posterior restoration screw thread and certainly exist size and position precision difference, reduce interior spiral shell There is the increase of threads turn resistance so as to cause the engaging portion of internal screw thread in the precision of line.Same needle accommodating chamber is also It is made of two halves, also will increase spool and relatively rotate inflexible problem.Rotor simultaneously（Interior threaded part）Deflection and vibration are only By original precision, just not high screw thread guarantees, therefore rotor is easy to glance off.

Utility model content

Precision existing for split type structure for existing motor-driven valve interior threaded part it is not high and cause spool be easy deflection, The problems such as vibration, the utility model are intended to provide a kind of motor-driven valve.

For this purpose, the utility model uses following technical scheme：A kind of motor-driven valve, including valve body outer cover, valve seat, internal thread part Part, externally threaded item, rotor and spool, the externally threaded item is by being threadedly engaged the internal screw thread for being threaded onto interior threaded part Kong Zhong is pierced by internal thread hole at the top of externally threaded item, and the externally threaded item is provided with spool pilot hole, and spool is threaded onto In spool pilot hole, the externally threaded item is divided into two sections, including external thread section and rotor linkage section, the rotor connection Section in hollow cavity and bottom opening it is semicylinder shape, the rotor linkage section is fixed at the top of external thread section The top of hollow cavity；The motor-driven valve further includes external screw thread seat, and the external screw thread seat is in the rotor linkage section It is symmetrical arranged, rotor linkage section and external screw thread seat cooperatively form cylindrical body, and cylinder engagement is threaded onto the central through hole of rotor.

As supplement to above-mentioned technical proposal and perfect, the utility model further includes following technical characteristic.

The spool pilot hole is set in the external thread section, and the top of external thread section is equipped with the first positioning region, First positioning region is in semicylinder shape, the bottom of half of center hole and the spool pilot hole with half of center hole Connection, the diameter of half of center hole are greater than the diameter of the spool pilot hole；

It is provided with second positioning region symmetrical with first positioning region at the top of the external screw thread seat, first Half of center hole of positioning region and the second positioning region forms complete center hole, and spring is arranged in center hole, described Spool upper end has ring-shaped step shoulder, and the bottom of ring-shaped step shoulder is resisted against between center hole and spool pilot hole and is formed Step surface on, the bottom of the spring is resisted against the top of the ring-shaped step shoulder, second positioning region Top is provided with spring shoulder, is resisted against in the spring shoulder of the second positioning region at the top of spring, will leave or complete in spool After the valve port lifted off a seat entirely, ring-shaped step shoulder is connected on step surface, to realize positioning.Pass through shoulder and ring-shaped step Spring is compressed in shoulder cooperation, and spring is made to generate pressure to spool.

The externally threaded item and external screw thread seat passes through injection mold integrated injection molding respectively；The external thread part The peripheral part of the external thread section of part sequentially forms guide section and thread segment from top to bottom, and the outer diameter of guide section is greater than the outer of thread segment Diameter；The bottom of half of center hole of the second positioning region of the external screw thread seat be equipped with outside the top of the external thread section The shoulder of circumference cooperation, to ensure that radial positioning requirement between externally threaded item and external screw thread seat.

Half of center hole of the second positioning region of the external screw thread seat cooperated with first positioning region is matched Conjunction face is equipped with multiple positioning protrusion, and first positioning region is equipped with the positioning groove cooperated with positioning protrusion, convex It rises in insertion positioning groove, to prevent from relatively rotating between external screw thread seat and externally threaded item.

The rotor linkage section and the first positioning region and external screw thread seat and the second positioning region are respectively formed up-small and down-big Semicolumn Step Shaft, the stepped hole of the rotor setting and the cooperation of semicolumn Step Shaft, rotor linkage section and external screw thread seat are matched It closes and is set to the lower hole of stepped hole, the lower section of the lower section of the first positioning region and the second positioning region is equipped in platform The lower section of the upper hole in rank hole, the lower section of the first positioning region and the second positioning region is respectively equipped with the arc positioning of evagination Protrusion is provided with the arc positioning groove with the cooperation of arc positioning protrusion on the hole wall of the upper hole of the stepped hole.

The middle section outer peripheral surface of first positioning region and the second positioning region is equipped with circlip holding tank, and circlip inlay card is in first In the circlip holding tank of positioning region and the second positioning region, the axial direction of externally threaded item and external screw thread seat is determined to further increase Position and radial positioning.

Interior threaded part is molded by the interior threaded part by injection mold injection molding and by the injection mold It is fixed on the valve seat, the bottom of the valve body outer cover is by being fixedly welded on the valve seat.

The spring shoulder is equipped with the balance through-hole of perforation center hole, and balance through-hole is led with central through hole, spool To the valve port of hole and valve seat be connected to, thus be completely eliminated externally threaded item, external screw thread seat, spool three constitute cavity inside and outside Air pressure balance problem.

The utility model can achieve following beneficial effect：1, the externally threaded item of the utility model passes through integrated through injection molding shape At semicolumn positioning region, it also is provided with semicolumn positioning region on threaded block, full circle column is constituted after cooperation, and by circlip realization and outside Screwed part and rotor axial and radial positioning guarantee to hold compared with existing assembly method by the cooperation of semicolumn positioning region Easily outer, externally threaded item ensure that external screw thread and guide section are complete, and the internal screw thread for reducing interior threaded part rubs with externally threaded Resistance is wiped, and improves and screws togather precision and guiding accuracy.2, the utility model realize external screw thread and internal thread structure simplification and Under conditions of assembly simplifies, external screw thread and guide section are arranged by the peripheral part in externally threaded item, it is inclined to be beneficial to prevent rotor Turn, improves the reliability of product.3, the spool of the utility model is threaded onto the spool pilot hole of externally threaded item, due to valve The face that core is contacted with externally threaded item is complete face（Without in conjunction with gap）, therefore the resistance of needle and externally threaded item rotation It is small.The cooperation for passing through semicolumn positioning region simultaneously, facilitates the installation of spool and spring.4, interior threaded part and externally threaded item are equal Using injection molding, since the plastics with self-lubricating both can be selected, so internal screw thread and external screw thread frictional resistance are small, Wearability is good.In addition internal screw thread and valve seat integrated injection molding simplify the process that interior threaded part and valve seat are fixed, improve Internal screw thread fixed precision, and internal screw thread has complete, integrated tooth form, accuracy of thread is higher.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model.

Fig. 2 is the side-looking direction structural schematic diagram of the externally threaded item of the utility model.

Fig. 3 is that the externally threaded item of the utility model faces direction structure schematic diagram.

Fig. 4 is the side-looking direction structural schematic diagram of the external screw thread seat of the utility model.

Fig. 5 is that the external screw thread seat of the utility model faces direction structure schematic diagram.

Fig. 6 is the externally threaded item of the utility model and the assembly decomposition state schematic diagram of external screw thread seat.

Fig. 7 is the externally threaded item of the utility model and the assembly exploded perspective status diagram of external screw thread seat.

Fig. 8 is the schematic perspective view of the rotor of the utility model.

Fig. 9 is the valve core structure schematic diagram of the utility model.

Specific embodiment

Specific embodiment of the present utility model is described in detail with reference to the accompanying drawing.

As shown in figs. 1-9, the utility model include valve body outer cover 1, valve seat 5, interior threaded part 2, externally threaded item 3, Rotor 6, spool 4 and external screw thread seat 8, externally threaded item 3, which passes through, to be threadedly engaged in the internal thread hole for being threaded onto interior threaded part 2, The top of externally threaded item 3 is pierced by internal thread hole, and externally threaded item 3 is provided with spool pilot hole, and spool 4 is threaded onto spool guiding Kong Zhong, externally threaded item 3 are divided into two sections, including external thread section 31 and rotor linkage section 32, and rotor linkage section 32 is in hollow Inner cavity and bottom opening it is semicylinder shape, the top of the hollow cavity of rotor linkage section 32 is fixed at the top of external thread section 31 Portion；External screw thread seat 8 is symmetrical set with rotor linkage section 32, and rotor linkage section 32 and external screw thread seat 8 cooperatively form cylindrical body, circle Cylinder fits through in the central through hole loaded on rotor 6.Preferably, spool pilot hole is set in external thread section 31, external thread section 31 top is equipped with the first positioning region 33, and the first positioning region 33 is in semicylinder shape, half of center with half of center hole The bottom of circular hole is connected to spool pilot hole, and the diameter of half of center hole is greater than the diameter of spool pilot hole；External screw thread seat 8 Top is provided with second positioning region 9 symmetrical with the first positioning region 33, and half of the first positioning region 33 and the second positioning region 9 Center hole forms complete center hole, and spring 7 is arranged in center hole, and spool upper end has ring-shaped step shoulder 41, ring The bottom of shape step shoulder 41 is resisted against on the step surface formed between center hole and spool pilot hole, and the bottom of spring 7 is supported It is against the top of ring-shaped step shoulder 41, the top of the second positioning region 9 is provided with spring shoulder 91, and the top of spring 7 is resisted against In the spring shoulder 91 of second positioning region 9, after the valve port that spool will leave or lift off a seat completely, ring-shaped step shoulder is supported It connects on step surface, to realize positioning.Spring is compressed by shoulder and the cooperation of ring-shaped step shoulder, makes spring to valve Core generates pressure.

Further, externally threaded item 3 and external screw thread seat 8 pass through injection mold integrated injection molding respectively；External thread part The peripheral part of the external thread section 31 of part 3 sequentially forms guide section and thread segment from top to bottom, and the outer diameter of guide section is greater than thread segment Outer diameter；The bottom of half of center hole of the second positioning region 9 of external screw thread seat 8 is equipped with the top peripheral portion with external thread section 31 The shoulder 93 of cooperation, to ensure that radial positioning requirement between externally threaded item and external screw thread seat.

Further, half of center hole of the second positioning region 9 of the external screw thread seat 8 cooperated with the first positioning region 33 is matched Conjunction face is equipped with multiple positioning protrusion 92, and the first positioning region 33 is equipped with the positioning groove 34 cooperated with positioning protrusion 92, positioning Protrusion 92 is inserted into positioning groove 34, to prevent from relatively rotating between external screw thread seat and externally threaded item.

Further, rotor linkage section 32 and the first positioning region 33 and external screw thread seat 8 and the second positioning region 9 are respectively formed Small lower big semicolumn Step Shaft, the stepped hole of the setting of rotor 6 and the cooperation of semicolumn Step Shaft, rotor linkage section 32 and external screw thread Seat 8 is equipped with the lower hole in stepped hole, the lower section cooperation of the lower section of the first positioning region 33 and the second positioning region 9 It is set to the upper hole of stepped hole, the lower section of the lower section of the first positioning region 33 and the second positioning region 9 is respectively equipped with outer Convex arc positioning protrusion 10 is provided with the arc cooperated with arc positioning protrusion 10 on the hole wall of the upper hole of stepped hole and positions Groove 61.

Further, the middle section outer peripheral surface of the first positioning region 33 and the second positioning region 9 is equipped with circlip holding tank, circlip inlay card In the circlip holding tank of the first positioning region 33 and the second positioning region 9, to further increase to externally threaded item and external screw thread The axially position and radial positioning of seat.

Further, interior threaded part 2 passes through injection mold injection molding and passes through the injection mold for interior threaded part 2 Injection molding is fixed on valve seat 5, and the bottom of valve body outer cover 1 is by being fixedly welded on valve seat 5.

Further, spring shoulder 91 is equipped with the balance through-hole of perforation center hole, balance through-hole and central through hole, valve The valve port of core pilot hole and valve seat connection, so that externally threaded item, external screw thread seat, spool three composition cavity be completely eliminated Inside and outside air pressure balance problem.

Motor-driven valve includes following installation step：

Step 1：Valve seat injection molding on interior threaded part and valve base part；

Step 2：Externally threaded item is screwed into interior threaded part by externally threaded item and external screw thread seat injection molding, and spool is inserted Enter in externally threaded item through hole, spring is installed on spool top, by the location hole of external screw thread seat opposite direction insertion externally threaded item In.

Step 3: covering rotor in the periphery of externally threaded item and external screw thread seat, and by snap ring be stuck in externally threaded item and In the annular groove of external screw thread seat.

Step 4: outer cover part is formed by welding in outer cover and horizontal adapter tube, outer cover part and valve base part are welded.7

Further, there are also following processes before step 1：Valve seat is fixed with the cover, by valve port and periphery Precision Machining, Vertical joint pipe is welded in the hole of the cover protrusion, constitutes valve base part.

Further, when internal screw thread and valve seat are molded, spool pilot hole, internal screw thread, outer spiral shell have been sequentially formed from top to bottom Line pilot hole.And spool pilot hole internal diameter is less than internal thread hole from top to bottom, internal thread hole is less than external screw thread pilot hole.Described Spool and spool pilot hole constitute secondary positioning and guiding, but the gap of spool and spool pilot hole is less than spool and externally threaded item It is small to penetrate through interporal lacuna.

Further, outer cover inner circumferential and the cover periphery cooperate, and laser welding is in the cover and outer cover bottom face.

Claims (8)

1. a kind of motor-driven valve, including valve body outer cover（1）, valve seat（5）, interior threaded part（2）, externally threaded item（3）, rotor（6） And spool（4）, it is characterised in that：The externally threaded item（3）Interior threaded part is threaded by being threadedly engaged（2）Interior spiral shell In pit, externally threaded item（3）Top be pierced by internal thread hole, the externally threaded item（3）It is provided with spool pilot hole, valve Core（4）It is threaded onto spool pilot hole, the externally threaded item（3）It is divided into two sections, including external thread section（31）Connect with rotor Connect section（32）, the rotor linkage section（32）In semicylinder shape, the external thread section with hollow cavity and bottom opening （31）Top be fixed on the rotor linkage section（32）Hollow cavity top；The motor-driven valve further includes external screw thread Seat（8）, the external screw thread seat（8）With the rotor linkage section（32）It is symmetrical set, rotor linkage section（32）With outer spiral shell Line seat（8）Cylindrical body is cooperatively formed, cylinder engagement is threaded onto rotor（6）Central through hole in.

2. a kind of motor-driven valve according to claim 1, it is characterised in that：The spool pilot hole is set to described outer Thread segment（31）In, external thread section（31）Top be equipped with the first positioning region（33）, the first positioning region（33）In in half Heart circular hole it is semicylinder shape, the bottom of half of center hole is connected to the spool pilot hole, half center hole it is straight Diameter is greater than the diameter of the spool pilot hole；

The external screw thread seat（8）Top be provided with and first positioning region（33）The second symmetrical positioning region （9）, the first positioning region（33）With the second positioning region（9）Half of center hole form complete center hole, in center hole Spring is set（7）, the spool upper end has ring-shaped step shoulder（41）, ring-shaped step shoulder（41）Bottom be resisted against On the step surface formed between heart circular hole and spool pilot hole, the spring（7）Bottom be resisted against the ring-shaped step Shoulder（41）Top, second positioning region（9）Top be provided with spring shoulder（91）, spring（7）Top against In the second positioning region（9）Spring shoulder（91）On.

3. a kind of motor-driven valve according to claim 2, it is characterised in that：The externally threaded item（3）With external screw thread seat （8）Pass through injection mold integrated injection molding respectively；The externally threaded item（3）External thread section（31）Peripheral part from upper Guide section and thread segment are sequentially formed under and, the outer diameter of guide section is greater than the outer diameter of thread segment；The external screw thread seat（8）? Two positioning regions（9）Half of center hole bottom be equipped with and the external thread section（31）Top peripheral portion cooperation shoulder （93）.

4. a kind of motor-driven valve according to claim 3, it is characterised in that：With first positioning region（33）The institute of cooperation The external screw thread seat stated（8）The second positioning region（9）Half of center hole mating surface be equipped with multiple positioning protrusion（92）, institute The first positioning region stated（33）It is equipped with and positioning protrusion（92）The positioning groove of cooperation（34）, positioning protrusion（92）Insertion positioning Groove（34）It is interior.

5. a kind of motor-driven valve according to claim 4, it is characterised in that：The rotor linkage section（32）With the first positioning Portion（33）And external screw thread seat（8）With the second positioning region（9）It is respectively formed up-small and down-big semicolumn Step Shaft, the rotor （6）Stepped hole with the cooperation of semicolumn Step Shaft, rotor linkage section are set（32）With external screw thread seat（8）It is equipped in stepped hole Lower hole, the first positioning region（33）The lower section and the second positioning region（9）The lower section be equipped in stepped hole Upper hole, the first positioning region（33）The lower section and the second positioning region（9）The lower section be respectively equipped with evagination arc it is fixed Position protrusion（10）, it is provided with and arc positioning protrusion on the hole wall of the upper hole of the stepped hole（10）The arc of cooperation positions Groove（61）.

6. a kind of motor-driven valve according to claim 5, it is characterised in that：First positioning region（33）With the second positioning Portion（9）Middle section outer peripheral surface be equipped with circlip holding tank, circlip inlay card is in the first positioning region（33）With the second positioning region（9）Circlip In holding tank.

7. a kind of motor-driven valve according to claim 6, it is characterised in that：The interior threaded part（2）Pass through injection mould Have injection molding and passes through the injection mold for interior threaded part（2）The valve seat is fixed in injection molding（5）On, the valve body Outer cover（1）Bottom by being fixedly welded on the valve seat（5）On.

8. a kind of motor-driven valve according to claim 7, it is characterised in that：The spring shoulder（91）It is equipped in perforation The balance through-hole of heart circular hole, balance through-hole are connected to the valve port of central through hole, spool pilot hole and valve seat.