CN210034625U

CN210034625U - Combined structure of electronic expansion valve positioning shaft and sliding rail shaft

Info

Publication number: CN210034625U
Application number: CN201920774276.3U
Authority: CN
Inventors: 何泽淼
Original assignee: ZHEJIANG HENGSEN INDUSTRY GROUP Co Ltd
Current assignee: ZHEJIANG HENGSEN INDUSTRY GROUP Co Ltd
Priority date: 2019-05-27
Filing date: 2019-05-27
Publication date: 2020-02-07
Anticipated expiration: 2029-05-27

Abstract

The utility model provides a combined structure of electronic expansion valve location axle and slide rail axle comprises slide rail axle, locking cover, location axle, the slide rail axle adopt plastics to mould plastics and form, the appearance is screw thread step shaft form, this structure unites two into one traditional spring slide rail and rotor shaft, the centre bore of installation location axle is established to slide rail axle center, the centre bore is a through-hole, it still gives the balance of ensureing the upper and lower chamber pressure of electronic expansion valve operating condition rotor. The locking sleeve is made of plastic, the overall shape is cylindrical, one end of the locking sleeve is a plane and is provided with a stepped counter bore, the other end of the locking sleeve is provided with a retaining shoulder for limiting the upward movement of the sliding ring, and the center of the locking sleeve is provided with a flat potential hole which is matched with the end of the chamfered edge of the sliding rail shaft. Assembling: the sliding ring is buckled at the flat potential end of the sliding rail shaft by the locking sleeve after being screwed into the sliding rail shaft, the blocking shoulder of the locking sleeve is aligned with the groove of the sliding rail shaft and is slowly inserted, when the non-return tooth rebounds through the tenon behind the edging hole, after the central hole of the sliding rail shaft is inserted into the positioning shaft, the tenon deforms and is restricted, and the positioning shaft, the sliding rail shaft and the locking sleeve are mutually locked.

Description

Combined structure of electronic expansion valve positioning shaft and sliding rail shaft

Technical Field

The utility model relates to a composite structure of electronic expansion valve location axle and slide rail axle.

Background

The existing electronic expansion valve rotor assembly main structure is characterized in that a valve seat is fixedly connected with a guide nut, a screw rod shaft and a magnetic ring are molded into a whole by injection, a positioning shaft is fixedly connected with the screw rod shaft, a valve needle spring is arranged in the screw rod and locked by a locking sleeve, the valve needle has certain freedom of movement under the action of the valve needle spring, a spring guide rail and a sliding ring are arranged on the positioning shaft, the screw rod shaft is in threaded connection with the guide nut, a positioning support provided with a stop rod is fixedly connected with a rotor shell, the rotor shell is fixedly connected with the valve seat, and a transverse pipe and. The rotor assembly rotates under the action of the stator electrified coil, and drives the screw rod shaft to lift under the action of the sliding ring, the spring guide rail and the stop rod so as to complete the change of opening and closing of the valve formed by the valve needle and the valve seat. The slip ring lifting guide is formed by assembling a spring guide rail, a rotor positioning shaft and a clamp spring, the number of working procedures is increased by combining a plurality of parts, the process is complex, the production cost is high, and the slip ring and the spring guide rail belong to the same flexible winding part, so that the assembly is troublesome.

Disclosure of Invention

The utility model designs a sliding rail axle that a section collected sliding ring direction, slide rail location, location axle fixed function and the integrated configuration of location axle, its beneficial effect is: the slide rail and the rotor shaft are combined into a whole, and plastic is adopted to replace metal materials, so that the structure and the manufacturing process of parts are easy, the production efficiency is improved, the energy conservation and the efficiency conservation are remarkable, and the slide rail shaft is good in stability by fixedly connecting the locking sleeve and the positioning shaft.

The utility model discloses constitute by slide rail axle, locking cover, location axle, the slide rail axle adopt plastics to mould plastics and form, the appearance totality is screw thread shoulder shaft form, the centre bore of installation location axle is established in slide rail axle center, the centre bore is a through-hole, it still gives the balance of ensureing electronic expansion valve operating condition rotor upper and lower chamber pressure, the initial thread end is established a set of tenon form hasp of taking the non return tooth to and be equipped with and keep off the identical recess of shoulder with the locking cover, the hasp is cut apart into two halves by a groove of crossing the centre bore. After the locking sleeve is installed, a blocking shoulder of the locking sleeve is used for limiting the sliding ring to move upwards, a thread tail end pit for limiting the sliding ring to move downwards is arranged at the tail end of a thread, a shaft block with a shaft shoulder is arranged below the thread, a positioning rib meshed with a rotor magnetic ring connecting sleeve is arranged at the position of the shaft block, a station identification plane parallel to the axis is arranged at the position of the shaft shoulder, and a shaft end cylinder is arranged below the shaft shoulder. In addition, on the premise of not influencing the screwing of the slip ring, a part of the thread is cut off to form a group of symmetrical planes, so that the manufacture of a mold and the demolding of an injection molding workpiece are facilitated. The locking sleeve is made of plastic, the overall shape is cylindrical, one end of the locking sleeve is a plane and is provided with a stepped counter bore, the other end of the locking sleeve is provided with a retaining shoulder for limiting the upward movement of the sliding ring, and the center of the locking sleeve is provided with a flat potential hole which is matched with the end of the chamfered edge of the sliding rail shaft. During assembly, the sliding ring is screwed into the sliding rail shaft and then buckled at the flat end of the sliding rail shaft by the locking sleeve, the blocking shoulder of the locking sleeve is aligned with the groove of the sliding rail shaft and is slowly inserted, the non-return teeth on the convex tenons of the sliding rail shaft are inwards squeezed and blended under the action of the central edging hole of the locking sleeve, when the non-return teeth rebound through the edging hole, the non-return teeth are opened again and are clamped at the edge of the edging hole, after the central hole of the sliding rail shaft is inserted into the positioning shaft, the inward deformation of the convex tenons is restricted, and the positioning shaft, the sliding rail shaft and the locking sleeve are mutually locked.

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 a front half-sectional view of fig. 1 according to the present invention.

Fig. 3 is a left side half-sectional view of fig. 1 according to the present invention.

Fig. 4 is a left side half-sectional view of fig. 3 according to the present invention.

Fig. 5 is a schematic top view of fig. 2 according to the present invention.

Fig. 6 is a schematic bottom view of fig. 2 according to the present invention.

Fig. 7 is a shaft measuring and indicating view of the slide rail shaft of the present invention.

Fig. 8 is an axial view of the locking sleeve of the present invention.

Fig. 9 is a schematic view of the position of the present invention in the rotor of the electronic expansion valve.

In the figure 1, a slide rail shaft; 1-1, a thread end pit; 1-2, positioning ribs; 1-3, shaft end cylinder; 1-4, shaft shoulder; 1-5, a starting thread end; 1-6, check teeth; 1-7, a groove; 1-8, identifying a plane; 2. a locking sleeve; 2-1, blocking shoulders; 3. positioning the shaft; 01. a rotor housing; 02. a fixed seat; 03. a stop lever; 04 a magnetic ring; 05. connecting sleeves; 06. a valve body; 07. a feed screw nut; 08. a screw rod; 09. and a slip ring.

Detailed Description

The utility model discloses constitute by slide rail axle (1), locking cover (2), location axle (3), slide rail axle (1) adopt plastics to mould plastics and form, the appearance totality is screw thread shoulder shaft form, the centre bore of installation location axle (3) is established in slide rail axle (1) axle center, the centre bore is a through-hole, it still gives in order to ensure the balance of electronic expansion valve operating condition rotor cavity pressure from top to bottom, the tenon form hasp of taking non return tooth (1-6) is established to originated screw thread end (1-5) to and be equipped with and keep off the identical recess of shoulder (1-7) with locking cover (2), the hasp is cut apart into two halves by a groove of crossing the centre bore. After the locking sleeve (2) is installed, a blocking shoulder (2-1) of the locking sleeve (2) is used for limiting the sliding ring (09) to go upwards, a thread tail end pit (1-1) for limiting the sliding ring (09) to go downwards is arranged at the tail end of a thread, a shaft stop with a shaft shoulder (1-4) is arranged below the thread, a positioning rib (1-2) meshed with a connecting sleeve of a rotor magnetic ring (04) is arranged at the shaft stop, a station identification plane (1-8) parallel to the axis is arranged at the shaft shoulder (1-4), and a shaft end cylinder (1-3) is arranged below the shaft shoulder. In addition, a part of the thread is cut off on the premise of not influencing the screwing of the sliding ring (09) to form a group of symmetrical planes, so that the manufacturing of a die and the demoulding of an injection molding workpiece are facilitated. The locking sleeve (1) is made of plastic, the overall shape is cylindrical, one end of the locking sleeve is a plane and is provided with a stepped counter bore, the other end of the locking sleeve is provided with a retaining shoulder (2-1) for limiting the upward movement of the sliding ring (09), and the center of the locking sleeve is provided with a flat hole which is matched with the chamfered shaft end of the sliding rail shaft (1). During assembly, a sliding ring (09) is screwed into a sliding rail shaft (1) and then is buckled at the flat potential end of the sliding rail shaft (1) by a locking sleeve (2), a blocking shoulder (2-1) of the locking sleeve (2) is aligned with a groove (1-7) of the sliding rail shaft (1) and is slowly inserted, a non-return tooth (1-6) on a tenon of the sliding rail shaft (1) is inwards extruded under the action of a central edging hole of the locking sleeve (2), when the non-return tooth (1-6) passes through the edging hole, the tenon rebounds, the non-return tooth (1-6) is propped open again and is clamped at the edge of the edging hole, after a central hole of the sliding rail shaft (1) is inserted into a positioning shaft (3), the inward deformation scope of the tenon is limited, and the positioning shaft (3), the sliding rail shaft (1) and the locking sleeve (2) are mutually locked.

Claims

1. A combined structure of an electronic expansion valve positioning shaft and a sliding rail shaft is characterized by consisting of the sliding rail shaft, a locking sleeve and the positioning shaft, wherein the sliding rail shaft is formed by plastic injection molding, is generally in a threaded stepped shaft shape and is provided with a threaded tail end pit, a positioning rib, a shaft end cylinder, a shaft shoulder, a starting threaded end, a non-return tooth, a groove and an identification plane; the axis is provided with a central hole for installing a positioning shaft, the central hole is a through hole, the starting thread end is a lead-in end of the sliding ring, the non-return tooth is a tenon-shaped lock catch, and the lock catch is divided into two parts by a groove passing through the central hole; a shaft stop with a shaft shoulder is arranged below the screw thread tail end pit, a positioning rib meshed with the rotor magnetic ring connecting sleeve is arranged at the shaft stop, a station identification plane parallel to the axis is arranged at the shaft shoulder, and a shaft end cylinder is arranged below the shaft shoulder; the locking sleeve is made of plastic, the overall shape is cylindrical, one end of the locking sleeve is a plane and is provided with a stepped counter bore, the other end of the locking sleeve is provided with a retaining shoulder for limiting the upward movement of the sliding ring, and the center of the locking sleeve is provided with a flat potential hole which is matched with the end of the chamfered edge of the sliding rail shaft.