A stop device for an electronic expansion valve and a method for installing a stopper

Abstract

The present invention discloses a stop device of an electronic expansion valve and a method for installing a stopper. The stop device of the electronic expansion valve includes a core shaft, a stop ring and a stopper. The stop ring is sleeved on the core shaft and can be spirally rotated along the axial direction of the core shaft; a plurality of grooves are provided on the side wall of one end of the core shaft along the radial direction of the core shaft; the stopper includes an annular block, a plurality of protrusions and a stopper; the annular block is sleeved on one end of the core shaft with the groove; one end of the plurality of protrusions is fixed on the inner side wall of the annular block close to the core shaft, and the other end of the protrusion is inserted into the corresponding groove; the stopper is fixed on the outer wall of the annular block away from the core shaft and has a plane one; the plane one is used to stop the rotation of the stopper ring. In the present invention, since the stopper is used to stop the stopper ring, the top end of the elastic member is not subjected to the stopping force and the stopping force is only borne by the stopper alone. The elastic member will not be deformed, so as not to affect the sliding of the stopper ring.

Description

Technical Field

[0001] The invention relates to the field of electronic expansion valves, in particular to a stopping device of an electronic expansion valve and a method for installing a stopper. Background Art

[0002] The electronic expansion valve uses the electrical signal generated by the adjusted parameter to control the voltage or current applied to the expansion valve, thereby achieving the purpose of adjusting the liquid supply. The stepless variable capacity refrigeration system has a wide range of refrigeration liquid supply adjustment and requires a fast adjustment response. Traditional throttling devices (such as thermal expansion valves) are difficult to perform well, but electronic expansion valves can meet the requirements well.

[0003] The stopping device in the installation method of an electric valve and its stopping device and a stopping guide rail with publication number CN105333197B111 includes a stopping guide rail with upper and lower stopping parts, and a core shaft with upper and lower fixing parts for installing the stopping guide rail. The stopping guide rail clamps the core shaft by twisting, and is connected to the two ends of the core shaft by the upper fixing part and the lower fixing part respectively. However, in this scheme: the top of the stopping guide rail is fixed circumferentially, and the stop ring is attached to the stopping guide rail when stopping. The spring is easy to deform and the positioning is inaccurate. At the same time, the stopping guide rail has the risk of slipping due to its elasticity. In addition, the stopping guide rail has a complicated part at the top, which is difficult to process and the size is not easy to control, which is very likely to cause dimensional deviation and lead to the risk of positioning failure. Summary of the invention

[0004] The purpose of the present invention is to provide a stopper device for an electronic expansion valve and a method for installing a stopper. The stopper device for an electronic expansion valve is used to solve the problem that when the top end of a stopper guide rail is used to prevent the stopper ring from rotating, the stopper guide rail is easily deformed due to its elasticity, thereby affecting the sliding of the stopper ring.

[0005] To achieve the above object, the present invention provides the following technical solution: a stopping device for an electronic expansion valve, comprising:

[0006] Mandrel;

[0007] A stop ring is sleeved on the mandrel and can be spirally rotated along the axial direction of the mandrel;

[0008] A plurality of grooves are formed on the side wall of one end of the mandrel in the radial direction of the mandrel, and the plurality of grooves are arranged in an annular shape on the side wall of the mandrel;

[0009] The stopping device also includes:

[0010] A stopper, which is fixed on one end of the core shaft having the groove and is used to block the rotation of the stop ring;

[0011] Preferably, the stopper comprises:

[0012] An annular block is mounted on one end of the mandrel having the groove;

[0013] A plurality of protrusions corresponding to the plurality of grooves, one end of each of the plurality of protrusions being fixed on the inner side wall of the annular block close to the core shaft, and the other end of the protrusion being inserted into the corresponding groove;

[0014] The stop block is arranged on the annular block and has a plane 1; when the stop ring rotates to the end of the core shaft close to the stop piece, the plane 1 abuts against the stop ring and blocks the stop ring from continuing to rotate.

[0015] Preferably, the stopping device further comprises:

[0016] The protrusion is fixed on the end of the core shaft away from the stopper, and when the stopper ring rotates to the end of the core shaft away from the stopper, the protrusion abuts against the stopper ring and blocks the stopper ring from continuing to rotate.

[0017] Preferably, the stop block further has a plane 2 which is perpendicular to the plane 1, and the stopping device further comprises:

[0018] An elastic member is sleeved on the core shaft and installed between the stop block and the protrusion; one end of the elastic member abuts against the second plane, and the other end abuts against the protrusion;

[0019] The stop ring is sleeved on the elastic member so as to be indirectly sleeved on the core shaft.

[0020] Preferably, the end of the elastic member that abuts against the protrusion is also provided with a fixing portion; the stopping device further comprises:

[0021] A base is mounted on the end of the mandrel close to the protrusion; a notch is provided at the edge of the end of the base away from the mandrel;

[0022] Wherein, one end of the fixing portion away from the elastic member is fixed in the notch.

[0023] Preferably, the base and the core shaft are integrally formed.

[0024] Preferably, a plurality of channels are provided on the side wall of one end of the mandrel having the groove, and the plurality of channels correspond to the plurality of grooves and are arranged in a ring shape on the side wall of the mandrel; one end of each channel extends to the end surface of the mandrel, and the other end is connected to the corresponding groove;

[0025] When installing the stopper, the annular block is sleeved on one end of the core shaft with the groove, and the protrusion is located in the corresponding channel; the annular block is rotated to make the protrusion slide into the corresponding groove.

[0026] Preferably, when the stopper rotates, the second plane always abuts against one end of the elastic member.

[0027] Preferably, the plurality of protrusions are integrally formed with the annular block.

[0028] The present invention also provides a method for installing a stopper, which is applied to a stopper device of any of the above-mentioned electronic expansion valves. The method for installing the stopper comprises the following steps:

[0029] The annular block is mounted on the end of the mandrel having the groove, and the projection is located in the corresponding groove;

[0030] Rotate the annular block so that the projections slide into the corresponding grooves.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] In the present invention, a stopper is added to the top of the mandrel so that when the stop ring rotates to the end of the mandrel close to the stopper, a plane on the stop block contacts the stop ring and bears the stopping force to prevent the stop ring from continuing to rotate. In the present invention, since a stopper is used to stop the stop ring, the top of the elastic member is not subjected to the stopping force but only to the stopping member. The elastic member will not deform, thereby not affecting the sliding of the stop ring. At the same time, the stopper is a non-elastic body and will not cause the stopper to rebound, thereby enhancing the reliability of the stopper. In addition, since there is no special structure at the top of the elastic member, the elastic member is easy to process and convenient for size control. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the explosion structure of the present invention;

[0034] Figure 2 A schematic diagram of the stopper structure;

[0035] Figure 3 It is a schematic diagram of the combined structure of the present invention when the bump is located in the trench;

[0036] Figure 4 It is a schematic diagram of the combined structure of the present invention when the protrusion is located in the groove;

[0037] Figure 5 Schematic diagram of the structure of an electronic expansion valve using a stop device.

[0038] In the figure: base 1, notch 11, protrusion 12, core shaft 2, groove 21, channel 22, elastic member 3, fixing portion 31, stop ring 4, stop member 5, annular block 51, protrusion 52, stop block 53, plane 1 531, plane 2 532, valve needle component 6, rotor 7. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Example 1

[0041] This embodiment provides a stop device for an electronic expansion valve, which is used to solve the problem that when the top end of the stop rail is used to prevent the stop ring from rotating, the stop rail is easily deformed due to its elasticity, thus affecting the sliding of the stop ring 4.

[0042] refer to Figure 1-3 The stopping device includes a base 1, a core shaft 2, an elastic member 3, a stop ring 4, a stop member 5, and a protrusion 12.

[0043] The core shaft 2 may be a cylindrical structure. A plurality of grooves 21 are provided on the side wall of one end of the core shaft 2 along the radial direction of the core shaft 2. The plurality of grooves 21 are arranged in a ring shape on the side wall of the core shaft 2. A plurality of channels 22 are provided on the side wall of the core shaft 2 having the grooves 21. The plurality of channels 22 correspond to the plurality of grooves 21 and are arranged in a ring shape on the side wall of the core shaft 2. One end of each channel 22 extends to the end face of the core shaft 2, and the other end is connected to the corresponding groove 21 and can be perpendicular to the groove 21 to form an L-shaped positioning groove.

[0044] The elastic member 3 may be a spring and may be sleeved on the core shaft 2. The stop ring 4 is sleeved on the core shaft 2 and can be rotated in a spiral manner along the axial direction of the core shaft 2. In this embodiment, the stop ring 4 is sleeved on the elastic member 3 to be indirectly sleeved on the core shaft 2, and can also be rotated up and down in a spiral manner along the axial direction of the elastic member 3.

[0045] The stopper 5 is fixed on one end of the mandrel 2 having the groove 21 and is used to stop the rotation of the stop ring 4. That is, the stopper 5 is fixed on a plurality of L-shaped positioning grooves. Figure 2 As shown, the stopper 5 includes an annular block 51, a plurality of protrusions 52 and a stopper block 53. The annular block 51 is mounted on one end of the core shaft 2 having the groove 21. That is, the annular block 51 and the plurality of grooves 21 overlap in rotation circle. The plurality of protrusions 52 correspond to the plurality of grooves 21. The plurality of protrusions 52 can be integrally formed with the annular block 51. One end of the plurality of protrusions 52 is fixed on the inner side wall of the annular block 51 close to the core shaft 2, and the other end of the protrusion 52 is inserted into the corresponding groove 21. The inner walls of the plurality of grooves 21 are installed with rubber pads to reduce the impact force of the protrusions 52 on the grooves 21.

[0046] The stop block 53 is arranged on the annular block 51. In this embodiment, the stop block 53 can be fixed on the outer wall of the annular block 51 away from the core shaft 2, and has a plane 1 531 and a plane 2 532 which is perpendicular to the plane 1 531. When the stop ring 4 rotates to the end of the core shaft 2 close to the stopper 5, the plane 1 531 abuts against the stop ring 4 and prevents the stop ring 4 from continuing to rotate.

[0047] When installing the stopper 5, the annular block 51 is mounted on the end of the mandrel 2 having the groove 21, and the protrusion 52 is located in the corresponding groove 22 (such as Figure 3 Rotate the annular block 51 to allow the protrusion 52 to slide into the corresponding groove 21 (as shown). Figure 4 When the stopper 5 rotates, the second plane 532 always abuts against one end of the elastic member 3.

[0048] The protrusion 12 is fixed on the end of the core shaft 2 away from the stopper 5, and when the stopper ring 4 rotates to the end of the core shaft 2 away from the stopper 5, it abuts against the stopper ring 4 and blocks the stopper ring 4 from continuing to rotate. The elastic member 3 is installed between the stop block 53 and the protrusion 12. One end of the elastic member 3 abuts against the plane 2 532, and the other end abuts against the protrusion 12. In this way, when the plane 1 531 blocks the stopper ring 4 from rotating, the stopper ring 4 will not contact the elastic member 3, that is, the top of the elastic member 3 is not subject to the stopping force and the stopping force is only borne by the stopper 5 alone. The elastic member 3 will not be deformed, so as not to affect the sliding of the stopper ring 4. At the same time, the stopper 5 is a non-elastic body, which will not cause the stopper to rebound, thereby enhancing reliability. In addition, the top of the elastic member 3 has no special structure, and the processing is simple, which is convenient for size control.

[0049] The base 1 is mounted on one end of the mandrel 2 close to the protrusion 12; a notch 11 is provided at the edge of the end of the base 1 away from the mandrel 2. A fixing portion 31 is also provided at the end of the elastic member 3 that abuts against the protrusion 12. The end of the fixing portion 31 away from the elastic member 3 is fixed in the notch 11 to stabilize the elastic member 3 on the mandrel 2 and prevent it from being displaced with the rotation of the stop ring 4. In this embodiment, the base 1 and the mandrel 2 can be integrally formed.

[0050] In this embodiment, a stopper 5 is added to the top of the core shaft 2, so that when the stop ring 4 rotates to the end of the core shaft 2 close to the stopper 5, the plane 531 on the stop block 53 abuts against the stop ring 4 and bears the stopping force to prevent the stop ring 4 from continuing to rotate. In this embodiment, because the stopper 5 is used to stop the stop ring 4, the top of the elastic member 3 is not subject to the stopping force and the stopping force is only borne by the stopper 5 alone. The elastic member 3 will not be deformed, so it will not affect the sliding of the stop ring 4. At the same time, the stopper 5 is a non-elastic body, which will not cause the stopper to rebound, thereby enhancing the reliability of the stopper. In addition, because there is no special structure at the top of the elastic member 3, the elastic member 3 is simple to process and easy to control in size.

[0051] Example 2

[0052] refer to Figure 5 This embodiment provides an electronic expansion valve, which includes a valve needle component 6, a rotor 7 and a stop device for controlling the valve needle opening and closing stroke of the valve needle component 6.

[0053] The valve needle of the valve needle component 6 is inserted into the core shaft 2 and can move up and down along the axial direction of the core shaft 2. One end of the rotor 7 is installed with the stop ring 4 and is used to drive the stop ring 4 to rotate spirally. The other end of the rotor 7 is connected to the valve needle of the valve needle component 6 and drives the valve needle to move up and down to adjust the opening and closing of the valve and the size of the opening. The stop device is the stop device described in Example 1.

[0054] Example 3

[0055] This embodiment provides a method for installing a stopper, which is applied to the stopper device of the electronic expansion valve described in Example 1. The method for installing the stopper includes the following steps:

[0056] The annular block 51 is mounted on the end of the mandrel 2 having the groove 21 , and the projection 52 is located in the corresponding groove 22 .

[0057] The annular block 51 is rotated so that the protrusion 52 slides into the corresponding groove 21. The fixed rotation direction of the annular block 51 is consistent with the stop direction, and the annular block 51 will not slip off. The protrusion 52 and the groove 21 are interference fit.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stopping device for an electronic expansion valve, comprising: Mandrel (2); A stop ring (4) is sleeved on the core shaft (2) and is capable of spirally rotating along the axial direction of the core shaft (2); The invention is characterized in that a side wall at one end of the mandrel (2) is provided with a plurality of grooves (21) along the radial direction of the mandrel (2), and the plurality of grooves (21) are arranged in an annular shape on the side wall of the mandrel (2); the stopping device further comprises: A stopper (5) is fixed to one end of the mandrel (2) having the groove (21) and is used to stop the rotation of the stopper ring (4); the stopper (5) comprises a stopper block (53), and when the stopper ring (4) rotates to an end of the mandrel (2) close to the stopper block (53), the stopper ring (53) abuts against the stopper ring (4) and stops the stopper ring (4) from continuing to rotate; A protrusion (12) is fixed on the end of the core shaft (2) away from the stopper (5), and when the stopper ring (4) rotates to the end of the core shaft (2) away from the stopper (5), it abuts against the stopper ring (4) and blocks the stopper ring (4) from continuing to rotate; An elastic member (3) is sleeved on the core shaft (2) and installed between the stop block (53) and the protrusion (12); one end of the elastic member (3) abuts against the stop block (53), and the other end abuts against the protrusion (12); the stop ring (4) is sleeved on the elastic member (3) to be indirectly sleeved on the core shaft (2).

2. The electronic expansion valve stop device according to claim 1, characterized in that: The stopper (5) comprises: An annular block (51) is mounted on one end of the mandrel (2) having the groove (21); A plurality of protrusions (52) correspond to the plurality of grooves (21); one end of the plurality of protrusions (52) is fixed on the inner wall of the annular block (51) close to the core shaft (2), and the other end of the protrusion (52) is inserted into the corresponding groove (21); the stop block (53) is arranged on the annular block (51) and has a plane 1 (531); when the stop ring (4) rotates to one end of the core shaft (2) close to the stop member (5), the plane 1 (531) abuts against the stop ring (4) and prevents the stop ring (4) from continuing to rotate.

3. The stopping device of the electronic expansion valve according to claim 2, characterized in that: The stop block (53) further comprises a second plane (532) which is perpendicular to the first plane (531); One end of the elastic member (3) abuts against the second plane (532), and the other end abuts against the protrusion (12).

4. The stopping device of the electronic expansion valve according to claim 3, characterized in that: One end of the elastic member (3) that abuts against the protrusion (12) is also provided with a fixing portion (31); the stopping device further comprises: A base (1) is mounted on an end of the core shaft (2) close to the protrusion (12); a notch (11) is provided at an edge of an end of the base (1) away from the core shaft (2); One end of the fixing portion (31) away from the elastic member (3) is fixed in the notch (11).

5. The stopping device of the electronic expansion valve according to claim 4, characterized in that: The base (1) and the core shaft (2) are integrally formed.

6. The stopping device of the electronic expansion valve according to claim 3, characterized in that: A plurality of grooves (22) are formed on the side wall of one end of the mandrel (2) having a groove (21), and the plurality of grooves (22) correspond to the plurality of grooves (21) and are arranged in a ring shape on the side wall of the mandrel (2); one end of each groove (22) extends to the end face of the mandrel (2), and the other end is connected to the corresponding groove (21); when installing the stopper (5), the annular block (51) is mounted on the end of the mandrel (2) having the groove (21), and the protrusion (52) is located in the corresponding groove (22); the annular block (51) is rotated to make the protrusion (52) slide into the corresponding groove (21).

7. The stopping device of the electronic expansion valve according to claim 6, characterized in that: When the stopper (5) rotates, the second plane (532) always abuts against one end of the elastic member (3).

8. The stopping device of the electronic expansion valve according to claim 2, characterized in that: The plurality of protrusions (52) are integrally formed with the annular block (51).

9. A method for installing a stopper, applied to the stopper device of an electronic expansion valve as claimed in any one of claims 1 to 8, characterized in that: The stopper installation method comprises the following steps: fitting an annular block (51) onto one end of a core shaft (2) having a groove (21), and positioning a protrusion (52) in a corresponding groove (22); and rotating the annular block (51) so that the protrusion (52) slides into the corresponding groove (21).

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