Valve driving device

Abstract

The utility model provides a valve driving device, which is helpful for inhibiting a welding part between a holding seat and a cylindrical part from being damaged and separated due to an axial force of the cylindrical part. The valve driving device comprises a shell, the shell is provided with a first face and a barrel-shaped part, the barrel-shaped part protrudes from the first face, and a protruding block is arranged on the peripheral face of the barrel-shaped part; the holding seat is arranged on the cylindrical part in a sleeving manner, is provided with a groove which is opened towards the first surface and is used for the convex block to be inserted, and is welded with the cylindrical part, a protruding part which protrudes towards one side of the cylindrical part in the circumferential direction is arranged in the groove, and the convex block is arranged in the protruding part in the circumferential direction of the cylindrical part. At least one part of the protruding part is located between the first face and the protruding block in the axial direction of the cylindrical part, and at least one part of the protruding part is welded to the protruding block on the axial opposite face, opposite to the protruding block, of the first face side in the axial direction of the cylindrical part.

Description

Technical Field

[0001] This utility model relates to a valve driving device. Background Technology

[0002] Conventionally, there is a valve actuation device comprising: a housing having a first face and a cylindrical portion protruding from the first face and having a protrusion on its outer peripheral surface; and a retaining seat fitted onto the cylindrical portion, having a groove opening toward the first face for the protrusion to be inserted into for circumferential locking, and being joined to the axial end face of the cylindrical portion by ultrasonic welding.

[0003] However, during the transportation of the aforementioned valve drive device, impacts may sometimes generate forces that could cause the retaining seat and the cylindrical part to separate axially in the cylindrical part. These forces may damage the weld between the retaining seat and the cylindrical part, resulting in the separation of the retaining seat and the cylindrical part.

[0004] To address the aforementioned issues, increasing the strength of ultrasonic welding could be considered. However, if both the cylindrical part and the retainer are made of resin, increasing the strength of ultrasonic welding (e.g., increasing the welding frequency or amplitude) may damage the resin material of both the cylindrical part and the retainer. Therefore, the problem that needs to be solved is how to prevent the weld between the retainer and the cylindrical part from breaking due to the axial force of the cylindrical part without increasing the strength of ultrasonic welding. Utility Model Content

[0005] This invention was made in view of the above-mentioned problems, and its purpose is to provide a valve driving device that helps to prevent the weld between the retaining seat and the cylindrical part from being broken and separated due to the axial force of the cylindrical part.

[0006] To achieve the above objectives, the present invention provides a valve driving device, comprising: a housing having a first surface and a cylindrical portion protruding from the first surface and having a protrusion on its outer peripheral surface; and a retaining seat sleeved on the cylindrical portion, having a groove opening toward the first surface for insertion of the protrusion, and welded to the cylindrical portion, wherein a protrusion protruding toward one side of the cylindrical portion in the circumferential direction is provided in the groove, at least a portion of the protrusion being located axially between the first surface and the protrusion in the cylindrical portion, and the at least a portion being welded to the protrusion on the axially opposite side of the cylindrical portion on the first surface side opposite to the protrusion.

[0007] According to the valve driving device of this utility model, a protrusion is provided in the groove, protruding towards one side of the cylindrical part in the circumferential direction. At least a portion of the protrusion is located between the first surface and the protrusion in the axial direction of the cylindrical part, and the at least a portion is welded to the protrusion on the axially opposite side of the first surface of the cylindrical part. Therefore, during transportation, even if a force is generated that would cause the retaining seat and the cylindrical part to separate in the axial direction of the cylindrical part due to impact, the force will be borne by the abutting portion of the at least a portion of the protrusion and the protrusion in the axial direction of the cylindrical part, thus preventing the retaining seat and the cylindrical part from separating due to the failure of the weld between them.

[0008] Furthermore, in the valve driving device of this utility model, it is preferable that the bottom surface of the groove is welded to the protrusion.

[0009] According to the valve drive device of this utility model, the bottom surface of the groove is welded to the protrusion. Therefore, during transportation or other processes, even if a force is generated that would cause the retaining seat and the cylindrical part to move closer together in the axial direction of the cylindrical part due to an impact, the force will be borne by the abutting part of the bottom surface of the groove and the protrusion in the axial direction of the cylindrical part, thus preventing the retaining seat and the cylindrical part from separating due to the failure of the weld between them.

[0010] Furthermore, in the valve drive device of this invention, it is preferable that the axially opposing surfaces extend in a plane perpendicular to the axial direction of the cylindrical portion.

[0011] According to the valve drive device of this utility model, the axially opposite surfaces extend in a plane perpendicular to the axial direction of the cylindrical part. Therefore, even if a force is generated due to impact or the like that would separate the retaining seat and the cylindrical part in the axial direction of the cylindrical part, a force that would separate the retaining seat and the cylindrical part in the circumferential direction of the cylindrical part will not be generated at the axially opposite surfaces due to this force. This helps to more reliably suppress the separation of the retaining seat and the cylindrical part due to the failure of the weld between them.

[0012] Furthermore, in the valve driving device of this utility model, the groove preferably has a first sidewall located on the other side of the cylindrical portion in the circumferential direction, the protrusion protrudes from the first sidewall, the protrusion has a circumferential opposing surface on the other side of the cylindrical portion in the circumferential direction opposite to the protrusion, the circumferential opposing surface extends along the axial direction of the cylindrical portion and is welded to the protrusion.

[0013] According to the valve driving device of this utility model, the protrusion has a circumferential opposing surface on the other side of the cylindrical portion in the circumferential direction, which is opposite to the protrusion. The circumferential opposing surface extends along the axial direction of the cylindrical portion and is welded to the protrusion. Therefore, the joint portion formed by welding the circumferential opposing surface of the protrusion on the other side of the cylindrical portion in the circumferential direction to the protrusion can withstand the force that would cause the retaining seat and the cylindrical portion to separate or approach each other in the axial direction of the cylindrical portion, and can further suppress the separation of the retaining seat and the cylindrical portion due to the failure of the weld between them.

[0014] Furthermore, in the valve driving device of this utility model, it is preferable that the protrusion and the bottom surface of the groove are separated axially from the cylindrical part, and the first sidewall is welded to the protrusion.

[0015] According to the valve driving device of this utility model, the first sidewall is welded to the protrusion. Therefore, the joint formed by welding the first sidewall to the protrusion can withstand the force that would cause the retaining seat and the cylindrical part to separate or move closer in the axial direction of the cylindrical part, and can further suppress the separation of the retaining seat and the cylindrical part due to the failure of the weld between them.

[0016] Furthermore, in the valve driving device of this invention, preferably in the circumferential direction of the cylindrical portion, the size of the opening of the groove is approximately equal to the size of the protrusion.

[0017] Furthermore, in the valve driving device of this utility model, it is preferable that the protrusions and the grooves are formed in multiple pairs in the circumferential direction of the cylindrical portion.

[0018] According to the valve drive device of this utility model, multiple pairs of protrusions and grooves are formed in the circumferential direction of the cylindrical part. Therefore, the axial bonding force between the retaining seat and the cylindrical part can be further enhanced, thereby further suppressing the separation of the retaining seat and the cylindrical part due to the failure of the weld between them.

[0019] Furthermore, in the valve drive device of this utility model, the protrusion preferably has: an axial extension that extends axially from the first surface along the cylindrical portion; and a circumferential extension that extends from the axial extension toward the other side of the cylindrical portion in the circumferential direction, wherein the axially opposite surfaces are welded to at least the circumferential extension of the axial extension and the circumferential extension.

[0020] Furthermore, the valve driving device of this utility model preferably further includes: a driving source disposed within the housing; an output shaft coaxially disposed within the housing with the cylindrical portion; and a transmission mechanism disposed within the housing, which transmits the driving force of the driving source to the output shaft.

[0021] Furthermore, in the valve driving device of this utility model, the retaining seat preferably has a retaining seat cylinder portion coaxially sleeved on the cylindrical portion, the retaining seat cylinder portion having the groove, a retaining seat flange formed on the outer circumferential surface of the retaining seat cylinder portion at a position farther from the first surface than the groove, and an annular portion protruding towards the inner circumferential side formed on the inner circumferential surface of the retaining seat cylinder portion at a position farther from the first surface than the groove, the end face of the first surface side of the annular portion being welded to the end face of the cylindrical portion, the valve driving device also having an annular component, a threaded portion and an annular component flange closer to the first surface than the threaded portion are provided on the inner circumferential surface of the annular component, the annular component is coaxially sleeved on the retaining seat cylinder portion, and the annular component flange is sandwiched between the first surface and the retaining seat flange in the axial direction of the cylindrical portion.

[0022] (Utility Model Effect)

[0023] According to this utility model, a protrusion is provided in the groove, protruding towards one side of the cylindrical part in the circumferential direction. At least a portion of the protrusion is located between the first surface and the protrusion in the axial direction of the cylindrical part, and the at least a portion is welded to the protrusion on the axially opposite side of the first surface of the cylindrical part. Therefore, during transportation, even if a force is generated that would cause the retainer and the cylindrical part to separate in the axial direction of the cylindrical part due to impact, the force will be borne by the abutting portion of the at least a portion of the protrusion and the protrusion in the axial direction of the cylindrical part, thus preventing the retainer and the cylindrical part from separating due to the failure of the weld between them. Attached Figure Description

[0024] Figure 1 This is a perspective view schematically illustrating a valve driving device according to an embodiment of the present invention, wherein the annular component is omitted.

[0025] Figure 2 This is a side view schematically illustrating a valve driving device according to an embodiment of the present invention, wherein the annular component is omitted.

[0026] Figure 3 This is a partial cross-sectional perspective view schematically illustrating the valve driving device according to an embodiment of the present invention, and showing the state of the annular component near the first surface of the housing.

[0027] Figure 4 This is a partial cross-sectional perspective view schematically illustrating the valve driving device according to an embodiment of the present invention, showing the state of the annular component away from the first surface of the housing.

[0028] Figure 5 This is a partial perspective view schematically showing the housing in the valve drive device according to an embodiment of the present invention.

[0029] (Symbol Explanation)

[0030] 1 Valve Actuation Device

[0031] 10. Shell

[0032] 11. Top Slab

[0033] 111 First page

[0034] 12 cylindrical part

[0035] 121 bumps

[0036] 1211 Axial extension

[0037] 1212 Circumferential Extension

[0038] 13 Side panels

[0039] 20. Maintain a seat

[0040] 21. Maintain seat portion

[0041] 211 Groove

[0042] 2111 First sidewall

[0043] 212 Protrusion

[0044] 213 Retaining seat flange

[0045] 214 Annular portion

[0046] 30 Ring-shaped components

[0047] 31 Threaded section

[0048] 32. Annular component flange

[0049] 90 Output Shaft

[0050] SF1 Axial Relative Surface

[0051] SF2 circumferential opposite surface

[0052] SF3 Bottom Detailed Implementation

[0053] Below, in conjunction with Figures 1 to 5 The embodiments of this utility model will be described.

[0054] For ease of explanation, the three mutually orthogonal directions are designated as the X direction, Y direction, and Z direction. One side of the X direction is designated as X1, and the other side of the X direction is designated as X2. One side of the Y direction is designated as Y1, and the other side of the Y direction is designated as Y2. One side of the Z direction is designated as Z1, and the other side of the Z direction is designated as Z2. Furthermore, the axis of rotation of the hinge is assumed to be aligned with the X direction.

[0055] (Overall structure of the valve drive device)

[0056] like Figures 1 to 5 As shown, the valve drive device 1 includes: a housing 10 having a first surface 111 and a cylindrical portion 12 protruding from the first surface 111 and having a protrusion 121 on its outer peripheral surface; and a retaining seat 20 sleeved on the cylindrical portion 12, having a groove 211 opening toward the first surface 111 for the protrusion 121 to be inserted, and being welded to the cylindrical portion 12.

[0057] Here, as Figure 3 and Figure 4 As shown, the valve drive device 1 also includes an annular component 30, which is sleeved on the retaining seat 20.

[0058] In addition, such as Figure 3 and Figure 4 As shown, the valve drive device 1 further includes: a drive source (not shown) disposed within the housing 10; an output shaft 90 coaxially disposed within the housing 10 with the cylindrical portion 12; and a transmission mechanism (not shown) disposed within the housing 10 and transmitting the driving force of the drive source to the output shaft 90. The output shaft 90 is used to connect to the driven object (e.g., the valve core of a valve).

[0059] (Structure of the shell)

[0060] As described above, the housing 10 has a first surface 111 and a cylindrical portion 12.

[0061] Here, as Figure 1 As shown, the housing 10 has a top plate 11 and a side plate 13. The thickness direction of the top plate 11 is aligned with the Z-direction. A surface on one side of the top plate 11 in its thickness direction forms a first surface 111, which extends in a plane perpendicular to the Z-direction. Figure 3 and Figure 4 As shown, the top plate 11 has a through hole extending along the Z direction. A cylindrical portion 12 extends along the periphery of the through hole in the top plate 11 in the Z1 direction. That is, the axial direction of the cylindrical portion 12 is aligned with the Z direction. A side plate 13 extends from the periphery of the top plate 11 in the Z2 direction. The side plate 13 includes plate portions opposite each other in the X direction and plate portions opposite each other in the Y direction.

[0062] In addition, such as Figure 1 , Figure 2 and Figure 5As shown, the protrusion 121 is formed in an L-shape and has: an axially extending portion 1211 that extends axially from the first surface 111 along the cylindrical portion 12; and a circumferentially extending portion 1212 that extends from the axially extending portion 1211 toward the other side of the cylindrical portion 12 in the circumferential direction. Multiple protrusions 121 are formed at intervals in the circumferential direction of the cylindrical portion 12. Preferably, multiple protrusions 121 are formed at equal intervals in the circumferential direction of the cylindrical portion 12.

[0063] (The structure of the seat)

[0064] As described above, the retainer 20 has a groove 211 and is welded to the cylindrical portion 12.

[0065] Here, as Figures 1 to 4 As shown, the retaining seat 20 has a retaining seat cylinder portion 21 coaxially sleeved on the cylindrical portion 12, and the retaining seat cylinder portion 21 has a groove 211. Multiple grooves 211 and protrusions 121 are formed at intervals in the circumferential direction of the cylindrical portion 12, corresponding to each other. Preferably, multiple grooves 211 and protrusions 121 are formed at equal intervals in the circumferential direction of the cylindrical portion 12.

[0066] In addition, such as Figure 2 As shown, a protrusion 212 protruding towards one side of the cylindrical portion 12 in the circumferential direction is provided within the groove 211. At least a portion of the protrusion 212 is located axially between the first surface 111 and the protrusion 121 of the cylindrical portion 12, and the axial opposing surface SF1 of this at least portion opposite the protrusion 121 on the first surface 111 side is welded to the protrusion 121. Specifically, the groove 211 has a first sidewall 2111 located on the other side of the cylindrical portion 12 in the circumferential direction. The protrusion 212 protrudes from the first sidewall 2111, and the axial opposing surface SF1 of the protrusion 212 extends in a plane perpendicular to the axial direction of the cylindrical portion 12 and is welded to the protrusion 121. The protrusion 212 has a circumferential opposing surface SF2 opposite the protrusion 121 on the other side of the cylindrical portion 12 in the circumferential direction, the circumferential opposing surface SF2 extends along the axial direction of the cylindrical portion 12 and is welded to the protrusion 121. The protrusion 212 and the bottom surface SF3 of the groove 211 are separated axially from the cylindrical portion 12, and the first sidewall 2111 is welded to the protrusion 121. Furthermore, the bottom surface SF3 of the groove 211 is welded to the protrusion 121. In the circumferential direction of the cylindrical portion 12, the size of the opening of the groove 211 is approximately equal to the size of the protrusion 121.

[0067] In addition, such as Figure 2 As shown, a retaining flange 213 is formed on the outer peripheral surface of the retaining sleeve portion 21 at a position farther from the first surface 111 than the groove 211. Figure 3As shown, on the inner circumferential surface of the retaining sleeve portion 21, an annular portion 214 protruding toward the inner circumferential side is formed at a position farther away from the first surface 111 than the groove 211. The end face of the annular portion 214 in the Z2 direction is welded to the end face of the sleeve portion 12 in the Z1 direction.

[0068] (Structure of the ring-shaped component)

[0069] As described above, the annular component 30 is fitted onto the retainer 20.

[0070] Here, as Figure 3 and Figure 4 As shown, the annular component 30 is coaxially sleeved on the retaining cylinder portion 21 of the retaining seat 20.

[0071] In addition, such as Figure 3 and Figure 4 As shown, a threaded portion 31 and an annular flange 32 closer to the first face 111 than the threaded portion 31 are provided on the inner circumferential surface of the annular member 30. The annular flange 32 is sandwiched between the first face 111 and the retaining seat flange 213 in the axial direction of the cylindrical portion 12. The threaded portion 31 is used to engage with the thread on the driven object side (e.g., the thread on the valve housing).

[0072] In addition, such as Figure 3 and Figure 4 As shown, the annular member 30 can move axially along the cylindrical portion 12 within a certain range relative to the retainer 20. Specifically, the annular member 30 can move relative to the retainer 20 between a first position and a second position. In the first position, the Z2 direction end face of the annular member 30 abuts against the first surface 111 (see reference). Figure 3 In the second position, the Z1 direction end face of the annular flange 32 of the annular member 30 abuts against the retaining seat flange 213 (see reference). Figure 4 ).

[0073] (Main effects of this implementation method)

[0074] According to the valve drive device 1 of this embodiment, a protrusion 212 protruding toward one side of the cylindrical portion 12 in the circumferential direction is provided in the groove 211. At least a portion of the protrusion 212 is located between the first surface 111 and the protrusion 121 in the axial direction of the cylindrical portion 12. The at least portion is welded to the protrusion 121 on the axial facing surface SF1 opposite to the protrusion 121 on the first surface 111 side in the axial direction of the cylindrical portion 12. Therefore, even if a force is generated in the axial direction of the cylindrical portion 12 due to impact or the like during transportation, the force will be borne by the abutment portion of the protrusion 212 and the protrusion 121 in the axial direction of the cylindrical portion 12, and the separation of the retaining seat 20 and the cylindrical portion 12 due to the failure of the weld between them is suppressed.

[0075] Furthermore, in the valve drive device 1 according to this embodiment, the bottom surface SF3 of the groove 211 is welded to the protrusion 121. Therefore, during transportation or other processes, even if a force is generated that would cause the retaining seat 20 and the cylindrical portion 12 to move closer together in the axial direction of the cylindrical portion 12 due to an impact, this force will be borne by the abutting portion of the bottom surface SF3 of the groove 211 and the protrusion 121 in the axial direction of the cylindrical portion 12, thus preventing the retaining seat 20 and the cylindrical portion 12 from separating due to the failure of the weld between them.

[0076] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above embodiments.

[0077] For example, in the above embodiment, the bottom surface SF3 of the groove 211 is welded to the protrusion 121, but it is not limited to this, the bottom surface SF3 of the groove 211 and the protrusion 121 can also be separated.

[0078] Furthermore, in the above embodiment, the axially opposing surface SF1 of the protrusion 212 extends in a plane perpendicular to the axial direction of the cylindrical portion 12, but is not limited thereto; the axially opposing surface SF1 may also be inclined relative to the axial direction of the cylindrical portion 12.

[0079] Furthermore, in the above embodiment, the circumferential opposing surface SF2 of the protrusion 212 is welded to the protrusion 121, but it is not limited to this, the circumferential opposing surface SF2 may also be separated from the protrusion 121.

[0080] Furthermore, in the above embodiment, the first sidewall 2111 of the groove 211 is welded to the protrusion 121, but it is not limited to this, and the first sidewall 2111 and the protrusion 121 can also be separated.

[0081] Furthermore, in the above embodiment, multiple protrusions 121 are formed in the circumferential direction of the cylindrical portion 12, but only one protrusion may also be formed.

[0082] Furthermore, in the above embodiment, the protrusion 121 is L-shaped, but it is not limited to this and can also be formed into other shapes such as T-shaped or straight.

[0083] Furthermore, in the above embodiments, the welding can be ultrasonic welding or soldering, etc.

[0084] It should be understood that within the scope of this utility model, the various parts in the embodiments can be freely combined, or the various parts in the embodiments can be appropriately modified or omitted.

Claims

1. A valve drive apparatus comprising: A housing having a first face and a cylindrical portion protruding from the first face and provided with a protrusion on an outer peripheral surface, and a retainer fitted to the cylindrical portion and having a groove opening toward the first face and into which the protrusion is inserted and being welded to the cylindrical portion, characterized by a protruding portion protruding toward one side in the circumferential direction of the cylindrical portion is provided in the groove, at least a portion of the protruding portion is located between the first face and the protrusion in the axial direction of the cylindrical portion, and the at least a portion is welded to the protrusion on the axial direction of the cylindrical portion and on an axial opposite face of the first face side opposite to the protrusion.

2. The valve drive device according to claim 1, wherein a bottom surface of the groove is welded to the protrusion.

3. The valve drive device according to claim 2, wherein the axial opposite face extends in a plane perpendicular to the axial direction of the cylindrical portion.

4. The valve drive device according to claim 3, wherein the groove has a first side wall on the other side in the circumferential direction of the cylindrical portion, the protruding portion protrudes from the first side wall, the protruding portion has a circumferential opposite face on the other side in the circumferential direction of the cylindrical portion opposite to the protrusion, the circumferential opposite face extends in the axial direction of the cylindrical portion and is welded to the protrusion.

5. The valve drive device according to claim 4, wherein the protruding portion is separated from the bottom surface of the groove in the axial direction of the cylindrical portion, the first side wall is welded to the protrusion.

6. The valve drive device according to claim 1, wherein the size of the opening of the groove is equal to the size of the protrusion in the circumferential direction of the cylindrical portion.

7. The valve drive device according to claim 1, wherein the protrusion has: an axial extension extending from the first face in the axial direction of the cylindrical portion; and a circumferential extension extending from the axial extension toward the other side in the circumferential direction of the cylindrical portion, the axial opposite face is welded to at least the circumferential extension of the axial extension and the circumferential extension.

8. The valve drive device according to claim 1, wherein the protrusion and the groove are formed in a plurality of pairs in the circumferential direction of the cylindrical portion.

9. The valve drive apparatus as defined in claim 1, wherein Further comprising: a drive source provided in the housing; an output shaft provided coaxially with the cylindrical portion in the housing; and a transmission mechanism provided in the housing and transmitting a driving force of the drive source to the output shaft.

10. The valve drive device according to claim 1, wherein the retainer has a retainer cylindrical portion fitted coaxially to the cylindrical portion, the retainer cylindrical portion has the groove, a retainer flange is formed on an outer peripheral surface of the retainer cylindrical portion at a position farther from the first face than the groove, a ring-shaped portion protruding toward an inner peripheral side is formed on an inner peripheral surface of the retainer cylindrical portion at a position farther from the first face than the groove, and an end face of the first face side of the ring-shaped portion is welded to an end face of the cylindrical portion, ​ The valve driving device further has a ring member, a threaded portion is provided on an inner peripheral surface of the ring member, and a ring member flange closer to the first face than the threaded portion is provided, the ring member is coaxially fitted to the holding seat cylindrical portion, the ring member flange is sandwiched between the first face and the holding seat flange in the axial direction of the cylindrical portion.

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