CN211715787U

CN211715787U - Electronic expansion valve rotor with optimized valve needle structure

Info

Publication number: CN211715787U
Application number: CN202020187601.9U
Authority: CN
Inventors: 何泽淼
Original assignee: Zhejiang Hengsen Industry Group Co ltd
Current assignee: Zhejiang Hengsen Industry Group Co ltd
Priority date: 2020-02-20
Filing date: 2020-02-20
Publication date: 2020-10-20
Anticipated expiration: 2030-02-20

Abstract

An electronic expansion valve rotor with an optimized valve needle structure comprises a positioning shaft, a supporting seat, a shell, a sliding ring, a stop rod, a screw rod, a spring supporting seat, a seat ring, a nut, a transverse connecting pipe, a vertical connecting pipe, a valve seat, a valve needle, a fixed sleeve, a snap spring, a fixed frame, a valve needle spring, a magnetic ring and a spring guide rail. On the basis of the structure of the traditional electronic expansion valve, the purposes of simplifying the process, saving the energy consumption and reducing the production cost are achieved by adjusting the valve needle structure.

Description

Electronic expansion valve rotor with optimized valve needle structure

Technical Field

The utility model relates to an optimize electronic expansion valve rotor of needle structure.

Background

The main body structure of the existing electronic expansion valve rotor is basically similar, and on the combined design of a valve needle structure and a screw rod, the valve needle mostly adopts an inverted hanging structure with a retaining shoulder arranged at the tail part, namely the valve needle penetrates into a stepped hole of the screw rod from the upper part of the screw rod, and the retaining shoulder at the tail part of the valve needle is clamped at the step of the stepped hole; or the blocking shoulder penetrates from the lower part of the screw rod and is limited in the central hole of the screw rod through the lock sleeve, however, the cutting processing of the slender valve needle with the blocking shoulder is troublesome, the material utilization rate is low, and the manufacturing cost is relatively high. On the premise of not influencing the use effect, the market competitiveness of the product can be effectively improved by changing the structure of the part to reduce the consumption, so that the optimization and transformation of the part of the product in the industry are rather valued.

Disclosure of Invention

The utility model relates to an optimize electronic expansion valve rotor of needle structure, through the adjustment to the needle structure, make it reach the simplification technology, practice thrift the energy consumption, reduction in production cost's purpose.

The utility model discloses a realize like this, it comprises location axle, supporting seat, shell, sliding ring, check rod, lead screw, spring support, seat circle, nut, horizontal takeover, perpendicular takeover, disk seat, needle, fixed cover, jump ring, mount, needle spring, magnetic ring, spring rail. The positioning shaft is a stainless steel smooth round bar, is an injection molding insert of the supporting seat, and the embedding part is roughened to increase the combination firmness. The stop rod is a stainless steel rectangular strip material and is an injection molding insert of the support seat; the supporting seat is formed by plastic injection molding, the overall appearance is a cylinder with a cambered surface at the upper end, a through groove is formed in the end of the cambered surface, the cambered surface is matched with the cambered surface at the bottom end of the inner side of the shell, the overall bottom end of the supporting seat is a plane, an insert positioning shaft is arranged in the center of the vertical plane, and an insert stop rod is arranged beside the positioning shaft. The shell is a cylindrical thin-wall part, the arc surface at the bottom end of the shell is matched with the supporting seat, and the supporting seat is locked by pressing the riveting pit through the shell when being assembled in place. The nut is made of metal materials, the shape of the nut is cylindrical, the nut is fixedly connected with the valve seat, a pressure balance groove is arranged on the matching surface of the nut, a stepped threaded hole is formed in the center of the nut, an internal thread matched with the screw threads of the screw rod is arranged at the small-bore end, and the large-bore end is in clearance fit with the smooth circle of the middle section of the screw rod. The valve seat appearance be round step ladder form, the shoulder hole is established at one end center, large aperture and nut excircle tight fit, the centre is equipped with the direction section with needle clearance fit, the taper hole with needle complex is established to the other end, the toper diffusion hole is established to the taper hole outer end, toper diffusion hole peripheral hardware and direct pipe welded round platform, the horizontal connecting pipe is established to the below trompil in valve seat middle section. The spring guide rail is a steel wire winding part and laid on the positioning shaft to guide the sliding ring. The screw rod is made of metal materials, the shape of the screw rod is generally cylindrical, one end of the outer circumference is provided with an external thread matched with the nut, the hole port is provided with a thin lip, the diameter of the middle position is in clearance fit with the non-threaded hole section of the nut, and the other end of the screw rod is provided with a thread guide rail and a groove for installing a die-casting magnetic ring; a stepped hole is formed in the center of the screw rod, the threaded end is large in diameter, and a valve needle spring, a spring support, a valve needle, a clamp spring and a fixing sleeve are arranged in a cavity of the large hole; the small aperture of the screw rod is fixedly connected with the positioning shaft. The valve needle is made of a stainless steel polished round bar, one end of the valve needle is provided with a conical head matched with the conical hole of the valve seat, and the other end of the valve needle is provided with a groove for installing the clamp spring. The fixed sleeve is a metal round sleeve, the outer diameter of the fixed sleeve is matched with the screw rod hole, and the inner diameter of the fixed sleeve is in clearance fit with the valve needle. The spring support is in a stepped cylinder shape, the diameter of the small end is in clearance fit with the inner diameter of a valve needle spring, the diameter of the large end is in clearance fit with the aperture of the screw rod, and a spherical bearing point is arranged at the center of the end face of the large end. The magnetic ring is made of neodymium iron boron materials, the shape is cylindrical, one end of the magnetic ring is open, and the other end of the magnetic ring and the screw rod are integrally molded through injection. The fixing frame is an annular part, a plurality of positioning holes are formed in the half circumference of the ring and used for positioning the rotor and the stator, and the fixing frame is made of stainless steel materials.

During assembly, a sliding ring and a spring guide rail are arranged on a positioning shaft of an assembly of the positioning shaft, a stop rod and a supporting seat, then the positioning shaft is pressed into a screw rod hole of a magnetic ring and a screw rod injection molding assembly, the spring guide rail is fixed in a clamping groove of the screw rod and a clamping hole of the magnetic ring, a valve needle spring, a spring supporting seat and a valve needle provided with a snap spring are sequentially arranged at the other end of the screw rod, a fixing sleeve is arranged, and a thin lip of the screw rod is inwards extruded to lock the fixing sleeve or is locally welded and fixed by laser. Then the screw rod is screwed into a nut of an assembly consisting of the valve seat, the nut and the seat ring, the shell is buckled into the seat ring for consolidation, the fixed frame is welded at the joint of the shell and the seat ring, the position of the shell bordering on the supporting seat is pressed and riveted for consolidation, and finally the horizontal connecting pipe and the vertical connecting pipe are welded on the valve seat.

Drawings

The present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is the schematic view of the valve needle, the clamp spring and the assembly of the present invention.

In the figure 1, a shaft is positioned; 2. a supporting seat; 3. a housing; 4. a slip ring; 5. a stopper rod; 6. a screw rod; 7. a spring support; 8. a seat ring; 9. a nut; 10. a transverse connection pipe; 11. a vertical connection pipe; 12. a valve seat; 13. a valve needle; 14. fixing a sleeve; 15. a clamp spring; 16. a fixed mount; 17. a valve needle spring; 18. a magnetic ring; 19. a spring guide.

Detailed Description

The utility model discloses constitute by location axle (1), supporting seat (2), shell (3), sliding ring (4), stop lever (5), lead screw (6), spring support (7), seat circle (8), nut (9), horizontal takeover (10), erect and connect pipe (11), disk seat (12), needle (13), fixed cover (14), jump ring (15), mount (16), needle spring (17), magnetic ring (18), spring rail (19). The positioning shaft (1) is a stainless steel smooth round bar, is an injection molding insert of the supporting seat (2), and is scratched and roughened at the embedding part to increase the combination firmness. The stop rod (5) is a stainless steel rectangular strip material and is an injection molding insert of the support seat (2); the supporting seat (2) is formed by plastic injection molding, the overall appearance is a cylinder with a cambered surface at the upper end, a hollow groove is formed in the end of the cambered surface, the cambered surface is matched with the cambered surface at the bottom end inside the shell, the bottom end of the supporting seat (2) is overall a plane, an insert positioning shaft (1) is arranged at the center of the vertical plane, and an insert stop rod (5) is arranged beside the positioning shaft (1). The shell (3) is a cylindrical thin-wall part, the arc surface at the bottom end is matched with the supporting seat (2), and the supporting seat (2) is locked by pressing the riveting pit through the shell (3) when being assembled in place. The nut (9) is made of metal materials, is cylindrical in shape and is fixedly connected with the valve seat (12), a pressure balance groove is arranged on a matching surface of the nut, a stepped threaded hole is formed in the center of the nut (9), an internal thread matched with the screw thread of the screw rod (6) is arranged at the small-bore end, and the large-bore end is in clearance fit with the middle section smooth circle of the screw rod (6). The appearance of valve seat (12) be the circular ladder form, the shoulder hole is established at one end center, large aperture and nut (9) excircle tight fit, the centre is equipped with the direction section with needle (13) clearance fit, the other end establish with needle (13) complex taper hole, the toper diffusion hole is established to the taper hole outer end, toper diffusion hole peripheral hardware and direct pipe welded round platform, horizontal connecting pipe (10) are established to the below trompil in valve seat (12) middle section. The spring guide rail (19) is a steel wire winding part and laid on the positioning shaft (1) to guide the operation of the sliding ring. The screw rod (6) is made of metal materials, the shape of the screw rod is generally cylindrical, an external thread matched with the nut (9) is arranged at one end of the outer circumference, a thin lip is arranged at the hole port, the diameter of the middle position of the screw rod is in clearance fit with the unthreaded hole section of the nut (9), and a groove for installing a threaded guide rail (19) and a die-casting magnetic ring (18) is arranged at the other end of the screw rod (6); a stepped hole is formed in the center of the screw rod (6), the threaded end is large in diameter, and a valve needle spring (17), a spring support (7), a valve needle (13), a clamp spring (15) and a fixing sleeve (14) are arranged in a cavity of the large hole; the small aperture of the screw rod (6) is fixedly connected with the positioning shaft (1). The valve needle (13) is made of a stainless steel polished round bar, one end of the valve needle is provided with a conical head matched with the conical hole of the valve seat (12), and the other end of the valve needle is provided with a groove for installing the clamp spring (15). The fixed sleeve (14) is a metal round sleeve, the outer diameter of the fixed sleeve is matched with the hole of the screw rod (6), and the inner diameter of the fixed sleeve is in clearance fit with the valve needle (13). The spring support (7) is in a stepped cylinder shape, the diameter of the small end is in clearance fit with the inner diameter of the valve needle spring (17), the diameter of the large end is in clearance fit with the aperture of the screw rod (6), and a spherical bearing point is arranged at the center of the end face of the large end. The magnetic ring (18) is made of neodymium iron boron materials, the shape is cylindrical, one end is open, and the other end and the screw rod (6) are integrally molded through injection. The fixing frame (16) is an annular part, a plurality of positioning holes are formed in the half circumference of the ring for positioning the rotor and the stator, and the fixing frame is made of stainless steel materials.

During assembly, a sliding ring (4) and a spring guide rail (19) are arranged on a positioning shaft (1) of a component of the positioning shaft (1), a stop rod (5) and a supporting seat (2), then the positioning shaft (1) is pressed into screw rod (6) holes of a magnetic ring (18) and a screw rod (6) injection molding component, the spring guide rail (19) is fixed in clamping grooves of the screw rod (6) and clamping holes of the magnetic ring (18), a valve needle spring (17), a spring support (7) and a valve needle (13) provided with a clamping spring (15) are sequentially arranged at the other end of the screw rod (6), a fixing sleeve (14) is arranged, and a thin lip of the screw rod (6) is inwards extruded to lock the fixing sleeve (14) or is locally welded and fixed by adopting laser. Then a screw rod (6) is screwed into a nut (9) of an assembly consisting of a valve seat (12), a nut (9) and a seat ring (8), then the shell (3) is buckled into the seat ring for consolidation, then a fixed frame is welded at the joint of the shell and the seat ring, then a pressing and riveting point is formed at the position where the shell is connected with a supporting seat for consolidation, and finally a transverse connecting pipe and a vertical connecting pipe are welded on the valve seat.

Claims

1. An electronic expansion valve rotor with an optimized valve needle structure is characterized by comprising a positioning shaft, a supporting seat, a shell, a sliding ring, a stop rod, a screw rod, a spring support, a seat ring, a nut, a transverse connecting pipe, a vertical connecting pipe, a valve seat, a valve needle, a fixing sleeve, a clamp spring, a fixing frame, a valve needle spring, a magnetic ring and a spring guide rail, wherein the positioning shaft is an injection molding insert of the supporting seat, the stop rod is an injection molding insert of the supporting seat, the supporting seat is formed by injection molding of plastics, the nut is made of metal materials, is cylindrical in appearance, is fixedly connected with the valve seat, a pressure balance groove is arranged on a matching surface of the nut, a stepped threaded hole is arranged in the center of the nut, an internal thread matched with a screw thread is arranged at a small-bore end, a large-bore end is in clearance fit with a middle section of the screw, the middle part of the valve seat is provided with a guide section which is in clearance fit with the valve needle, the other end of the valve seat is provided with a taper hole which is matched with the valve needle, the outer end of the taper hole is provided with a taper diffusion hole, a circular table which is welded with the direct pipe is arranged outside the taper diffusion hole, and a transverse connecting pipe is arranged at a hole below the middle section of the valve seat; the screw rod is made of metal materials, the shape of the screw rod is generally cylindrical, one end of the outer circumference is provided with an external thread matched with the nut, the hole port is provided with a thin lip, the diameter of the middle position is in clearance fit with the non-threaded hole section of the nut, and the other end of the screw rod is provided with a thread guide rail and a groove for installing a die-casting magnetic ring; a stepped hole is formed in the center of the screw rod, the threaded end is large in diameter, a valve needle spring, a spring support, a valve needle, a snap spring and a fixing sleeve are installed in a cavity of the large hole, and the small diameter of the screw rod is fixedly connected with the positioning shaft; the valve needle make by the drawing smooth pole of stainless steel material, one end establish with disk seat taper hole assorted conical head, the slot of installation jump ring is established to the other end, fixed cover be metal circle sleeve pipe, the external diameter matches with the lead screw hole, internal diameter and valve needle clearance fit, spring support be the ladder cylindric, tip diameter and valve needle spring internal diameter clearance fit, tip diameter and lead screw aperture clearance fit establish the sphere supporting point in the terminal surface center department of tip, the magnetic ring appearance be cylindricly, one end is opened, the other end moulds plastics integratively with the lead screw.