CN211501690U

CN211501690U - Electronic expansion valve stop structure capable of reducing number of parts

Info

Publication number: CN211501690U
Application number: CN201922301473.6U
Authority: CN
Inventors: 徐协斌; 陆海明
Original assignee: Hilite Automobile Technology Co ltd
Current assignee: Hilite Automobile Technology Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-09-15
Anticipated expiration: 2029-12-19

Abstract

The utility model discloses a can reduce electronic expansion valve backstop structure of part quantity, it relates to the electronic expansion valve field. The problem that the existing stop structure is large in part number, so that failure risks are large and the assembling process is complex is solved. The technical scheme is characterized by comprising a female thread seat, a mandrel screw, a connecting plate and a rotor magnetic ring; a guide rail spring and a sliding ring are respectively sleeved on the female thread seat, a radial extending section is arranged at one end of the sliding ring, and a limiting sliding groove is formed in the outer side wall of the female thread seat; the guide rail spring comprises a spiral part, and both ends of the spiral part are respectively provided with a short shaft extending section and a long shaft extending section penetrating through the connecting plate; the mandrel screw comprises two stopping states, wherein one stopping state is that the long shaft extending section is contacted with the end part of the slip ring, the other stopping state is that the short shaft extending section is contacted with the radial extending section, and the radial extending section is respectively contacted with two inner end walls of the limiting sliding groove in the two stopping states. The utility model discloses thereby have and reduce part quantity and reduce the simple advantage of inefficacy risk and assembly process.

Description

Electronic expansion valve stop structure capable of reducing number of parts

Technical Field

The utility model relates to an electronic expansion valve field, more specifically say, it relates to an electronic expansion valve backstop structure that can reduce part quantity.

Background

The existing electronic expansion valve is generally controlled by a stepping motor to regulate the flow of a refrigerant, and comprises a driver (the stepping motor), an actuating mechanism (a thread pair), a throttling mechanism (a valve needle valve port) and related auxiliary mechanisms. The stator coil of the stepping motor receives a pulse signal provided by the controller to drive the rotor magnetic ring to rotate, and the rotor magnetic ring (integrated with the mandrel screw) rotates to drive the valve needle (integrated with the female thread) to axially move up and down, so that the sizes of the through-flow sectional areas of the valve needle and the valve port are controlled.

In the refrigerating system, refrigerant enters the valve body through the refrigerant inlet and flows out of the valve body through the outlet pipe. When the valve is in a closed state, the valve needle assembly is in close contact with the valve port; when the valve is in the fully open state, the female thread runs to its highest position. If the stop structure is not provided, when the valve runs from the opening state to the closing state (or the valve is opened from the closing state to the maximum), if the stator of the stepping motor continues to drive the rotor magnetic ring to close (or open) the valve, the valve needle and the valve port (or the female thread and the sliding bearing) are blocked, and when the valve is opened reversely (or closed), the valve cannot be driven.

The stop structure of the existing scheme basically comprises three parts, namely a guide rail spring, a deflector rod and a sliding ring (the guide rail spring and the sliding ring have the same pitch and the same rotating direction). The rotor magnetic ring is fixedly connected with the mandrel screw, and the deflector rod is fixedly connected with the mandrel screw through laser welding, so that the deflector rod can rotate along with the rotor.

However, the deflector rod needs to be fixed on the mandrel screw rod through laser welding, so that the laser welding investment is increased, and the risk of insufficient welding failure exists; in addition, the rail spring needs to be fixed on the spindle and there is a risk of drop failure.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a can reduce the electronic expansion valve backstop structure of part quantity, thereby it has the advantage that reduces part quantity and reduce the inefficacy risk.

In order to achieve the above purpose, the utility model provides a following technical scheme:

an electronic expansion valve stop structure capable of reducing the number of parts comprises a female thread seat, wherein a mandrel screw is arranged in the middle of the female thread seat; one end of the mandrel screw rod protrudes out of the female thread seat, a connecting plate is fixedly sleeved at the end of the mandrel screw rod, and a rotor magnetic ring is fixedly sleeved on the connecting plate;

the outer side wall of the female thread seat is respectively sleeved with a guide rail spring and a sliding ring, a radial extending section is arranged at one end of the sliding ring, a limiting sliding groove matched with the radial extending section is axially formed in the outer side wall of the female thread seat, and the sliding ring can be driven to axially move in the rotating process of the guide rail spring;

the guide rail spring comprises a spiral part, and both ends of the spiral part are respectively provided with a short shaft extending section and a long shaft extending section penetrating through the connecting plate;

the mandrel screw comprises two stopping states, one is that the long shaft extending section is in contact with the end part of the slip ring, the other is that the short shaft extending section is in contact with the radial extending section, and the radial extending sections are in contact with the two inner end walls of the limiting sliding groove respectively in the two stopping states.

Furthermore, one or more eccentric through holes matched with the long shaft extending section are formed in the connecting plate.

Further, the number of turns of the slip ring is greater than 1 and less than 2.

To sum up, the utility model discloses following beneficial effect has:

only two parts which need to be installed are arranged in the stop structure, namely the guide rail spring and the sliding ring, so that the number of the parts can be reduced, and the failure risk is reduced; meanwhile, the guide rail spring and the sliding ring are simple to mount and do not need to be fixed.

Drawings

FIG. 1 is a schematic diagram of an electronic expansion valve stop structure capable of reducing the number of parts in an embodiment;

fig. 2 is a schematic structural view of the slip ring in the embodiment.

In the figure: 1. a female thread seat; 11. a limiting chute; 21. a spiral portion; 22. a short axis extension; 23. a long shaft extension section; 3. a slip ring; 31. a radially extending section; 4. a mandrel screw; 5. a rotor magnetic ring; 6. a connecting plate; 61. an eccentric through hole.

Detailed Description

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

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Example (b):

an electronic expansion valve stop structure capable of reducing the number of parts is disclosed, and referring to fig. 1, the electronic expansion valve stop structure comprises a female thread seat 1, wherein a mandrel screw rod 4 is arranged in the middle of the female thread seat 1; one end of the mandrel screw rod 4 protrudes out of the female thread seat 1, the connecting plate 6 is fixedly sleeved at the end of the mandrel screw rod, the rotor magnetic ring 5 is fixedly sleeved on the connecting plate 6, and the rotor magnetic ring 5, the connecting plate 6 and the mandrel screw rod 4 are fixed into a whole so as to synchronously rotate.

Referring to fig. 1 and 2, the outer side wall of the female thread seat 1 is respectively sleeved with a guide rail spring and a slip ring 3, one end of the slip ring 3 is bent to be provided with a radial extending section 31, and the outer side wall of the female thread seat 1 is axially provided with a limiting chute 11 matched with the radial extending section 31; the pitch of the guide rail spring is equal to that of the sliding ring 3, the rotating direction of the guide rail spring is the same, and the sliding ring 3 can be driven to move along the axial direction in the rotating process of the guide rail spring; the number of turns of the slip ring 3 is greater than 1 and less than 2, and the number of turns of the slip ring 3 is 1.5 in the embodiment.

Referring to fig. 1, the guide rail spring includes a spiral part 21, both ends of the spiral part 21 are respectively provided with a short axis extending section 22 and a long axis extending section 23 passing through the connecting plate 6, and the axes of the long axis extending section 23, the short axis extending section 22 and the female screw seat 1 are parallel; set up on the connecting plate 6 with major axis stretch out the eccentric through-hole 61 of section 23 complex, the quantity of eccentric through-hole 61 can be one or more, four eccentric through-holes 61 have been seted up to the equipartition on the connecting plate 6 in this embodiment.

Referring to fig. 1 and 2, the mandrel screw 4 includes two stop states, one is that the long axis extending section 23 contacts with the end of the sliding ring 3, the other is that the short axis extending section 22 contacts with the radial extending section 31, and the radial extending section 31 contacts with the two inner end walls of the limiting sliding groove 11 respectively in the two stop states.

The working principle is as follows:

after the rotor magnetic ring 5 rotates, the long shaft extension section 23 drives the spiral part 21 to rotate, and the spiral part 21 can drive the slip ring 3 to slide along the direction of the limiting chute 11; when the long shaft extending section 23 is contacted with the end part of the slip ring 3 and the radial extending section 31 is contacted with the inner end wall, close to the connecting plate 6, on the limiting sliding groove 11, the guide rail spring stops rotating, so that the spindle screw rod 4 is prevented from further rotating to reach a stop state; when the short shaft extension 22 contacts with the radial extension 31 and the radial extension 31 contacts with the inner end wall of the limit chute 11 far away from the connecting plate 6, the guide rail spring stops rotating, so that the spindle screw 4 is prevented from further rotating to reach a stop state.

The stop structure of the utility model is only provided with two parts to be installed, namely the guide rail spring and the slip ring 3, thereby reducing the number of the parts and reducing the failure risk; meanwhile, the guide rail spring and the sliding ring 3 are simple to install and do not need to be fixed.

Claims

1. The utility model provides a can reduce electronic expansion valve backstop structure of part quantity which characterized in that: the screw thread structure comprises a female thread seat, wherein a mandrel screw is arranged in the middle of the female thread seat; one end of the mandrel screw rod protrudes out of the female thread seat, a connecting plate is fixedly sleeved at the end of the mandrel screw rod, and a rotor magnetic ring is fixedly sleeved on the connecting plate;

2. The electronic expansion valve stop structure capable of reducing the number of parts according to claim 1, wherein: one or more eccentric through holes matched with the long shaft extending section are formed in the connecting plate.

3. The electronic expansion valve stop structure capable of reducing the number of parts according to claim 1 or 2, wherein: the number of turns of the slip ring is greater than 1 and less than 2.