Valve needle anti-rotation assembly and valve needle driving structure

Abstract

The utility model discloses a valve needle anti-rotation assembly and a valve needle driving structure. The valve needle anti-rotation assembly comprises a fixing base, an anti-rotation sleeve and a valve needle. A first through hole is formed in the fixed seat, and a first straight surface is arranged on the side wall of the first through hole; a second through hole is formed in the anti-rotation sleeve, a second straight face is arranged on the outer side wall of the anti-rotation sleeve, one end of the anti-rotation sleeve is located in the first through hole, and the second straight face makes contact with the first straight face; the side wall of the head of the valve needle is provided with a third straight face, the end face of the end, away from the fixing base, of the anti-rotation sleeve is provided with a groove communicated with the second through hole, the side wall of the groove is provided with a fourth straight face, and after the end, away from the head of the valve needle, of the valve needle sequentially penetrates through the second through hole and the first through hole, at least part of the head of the valve needle is located in the groove. And the third straight surface is in contact with the fourth straight surface. According to the utility model, the third straight surface and the fourth straight surface are matched with each other, and the second straight surface and the first straight surface are matched with each other, so that the valve needle is fixed in the circumferential direction, and the production quality is prevented from being influenced by the rotation of the valve needle in the production process.

Description

Technical Field

[0001] The utility model relates to the technical field of hot runner molds, and specifically, to a valve needle anti-rotation assembly and a valve needle driving structure. Background Art

[0002] In the related art, the valve needle of a hot runner mold is usually designed to be cylindrical. However, the cylindrical valve needle is prone to rotation during actual application, and the rotation of the valve needle will affect the production quality.

[0003] Therefore, the prior art needs to be improved and developed. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a valve needle anti-rotation assembly and a valve needle driving structure, which can prevent the valve needle from rotating during the production process to ensure the production quality.

[0005] In a first aspect, a valve needle anti-rotation assembly provided by the utility model includes: a fixed seat, an anti-rotation sleeve and a valve needle; a first through hole is provided on the fixed seat, and the side wall of the first through hole has a first straight surface; a second through hole is provided in the anti-rotation sleeve, and the outer side wall of the anti-rotation sleeve has a second straight surface. One end of the anti-rotation sleeve is located in the first through hole, and the second straight surface is in contact with the first straight surface; the side wall of the head of the valve needle has a third straight surface. A groove communicating with the second through hole is provided on the end surface of the anti-rotation sleeve away from the fixed seat, and the side wall of the groove has a fourth straight surface. After one end of the valve needle away from its head sequentially passes through the second through hole and the first through hole, at least part of the head of the valve needle is located in the groove, so that the third straight surface is in contact with the fourth straight surface.

[0006] According to an embodiment of the utility model, an extension part is provided on the surface of the fixed seat close to the anti-rotation sleeve, a third through hole is provided in the extension part, and the side wall of the third through hole has a fifth straight surface, and the fifth straight surface is coplanar with the first straight surface.

[0007] According to an embodiment of the utility model, the depth of the groove is greater than or equal to the thickness of the head of the valve needle.

[0008] According to an embodiment of the utility model, a plurality of positioning holes are provided on the surface of the fixed seat away from the anti-rotation sleeve.

[0009] According to an embodiment of the utility model, the number of the positioning holes is two, and the two positioning holes are arranged oppositely.

[0010] According to an embodiment of the utility model, a receiving groove communicating with the first through hole is provided on the surface of the fixed seat away from the anti-rotation sleeve.

[0011] According to an embodiment of the present invention, the fixing base is provided with a plurality of mounting holes.

[0012] According to an embodiment of the present invention, the number of the mounting holes is four, and the four mounting holes are evenly distributed around the first through hole.

[0013] In a second aspect, the present invention provides a valve needle driving structure, including the valve needle anti-rotation assembly described in the first aspect above.

[0014] According to an embodiment of the present invention, the valve needle driving structure further includes a driving member, and the driving member includes a base, a cylinder block, a cylinder head, a piston and a connecting head; one end of the cylinder block is connected to the base, the other end of the cylinder block is connected to the cylinder head, and a cavity is formed among the base, the cylinder block and the cylinder head; the piston is arranged in the cavity and can move in the cavity; one end of the connecting head penetrates through the base and extends into the cavity to be connected to the piston and is sleeved on the anti-rotation sleeve.

[0015] The beneficial effects of the present invention are as follows: The valve needle anti-rotation assembly and the valve needle driving structure of the present invention realize the circumferential fixation of the valve needle through the cooperation of the third straight surface and the fourth straight surface and the cooperation of the second straight surface and the first straight surface, so as to avoid the rotation of the valve needle during the production process and affect the production quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0017] Figure 1 is a schematic structural diagram of the valve needle anti-rotation assembly in an embodiment of the present invention;

[0018] Figure 2 is a cross-sectional view of the valve needle anti-rotation assembly in an embodiment of the present invention;

[0019] Figure 3 is an exploded schematic diagram of the valve needle anti-rotation assembly in an embodiment of the present invention;

[0020] Figure 4 is a schematic structural diagram of the valve needle driving structure in an embodiment of the present invention;

[0021] Figure 5 is a cross-sectional view of the valve needle driving structure in an embodiment of the present invention.

[0022] Description of the reference numerals:

[0023] 1. Fixed seat; 11. First through hole; 12. First straight surface; 13. Positioning hole; 14. Accommodating groove; 15. Mounting hole; 2. Anti-rotation sleeve; 21. Second through hole; 22. Second straight surface; 23. Groove; 24. Fourth straight surface; 3. Valve needle; 31. Third straight surface; 4. Extension part; 41. Third through hole; 42. Fifth straight surface; 5. Base; 6. Cylinder block; 7. Cylinder head; 8. Piston; 9. Connector; A. Mounting plate; B. Flow dividing plate. Detailed implementation manners

[0024] The following will disclose multiple implementation manners of the present utility model with diagrams. For the sake of clear illustration, many practical details will be described together in the following narration. However, it should be understood that these practical details are not used to limit the present utility model. That is to say, in some implementation manners of the present utility model, these practical details are not necessary. In addition, for the purpose of simplifying the diagrams, some conventional structures and components will be shown in a simple schematic manner in the diagrams.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the attached drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0026] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes, not specifically referring to the order or sequence, nor are they used to limit the present utility model. It is only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0027] To further understand the content, characteristics and effects of the present utility model, the following embodiments are cited and described in detail with the attached drawings as follows:

[0028] In the first aspect, as Figure 1 、 Figure 2 and Figure 3As shown in the figure, a valve needle 3 anti-rotation assembly provided by the present utility model includes a fixed seat 1, an anti-rotation sleeve 2 and a valve needle 3. The fixed seat 1 is provided with a first through hole 11, and the side wall of the first through hole 11 has a first straight surface 12. The anti-rotation sleeve 2 is provided with a second through hole 21, and the outer side wall of the anti-rotation sleeve 2 has a second straight surface 22. One end of the anti-rotation sleeve 2 is located in the first through hole 11, and the second straight surface 22 contacts the first straight surface 12; the side wall of the head of the valve needle 3 has a third straight surface 31, and a groove 23 communicating with the second through hole 21 is provided on the end surface of the anti-rotation sleeve 2 away from the fixed seat 1, and a fourth straight surface 24 is provided on the side wall of the groove 23. After one end of the valve needle 3 away from its head passes through the second through hole 21 and the first through hole 11 in sequence, at least part of the head of the valve needle 3 is located in the groove 23, so that the third straight surface 31 contacts the fourth straight surface 24.

[0029] In specific applications, the fixed seat 1 is fixedly arranged on the flow splitter plate B. The second straight surface 22 on the anti-rotation sleeve 2 cooperates with the first straight surface 12 on the fixed seat 1, which can make the anti-rotation sleeve 2 fixed relative to the fixed seat 1. The third straight surface 31 on the valve needle 3 cooperates with the fourth straight surface 24 on the side wall of the groove 23, which can make the valve needle 3 fixed relative to the anti-rotation sleeve 2. In this way, the valve needle 3 cannot rotate. It should be noted that the anti-rotation sleeve 2 being fixed relative to the fixed seat 1 means that the anti-rotation sleeve 2 cannot rotate relative to the fixed seat 1, and the valve needle 3 being fixed relative to the anti-rotation sleeve 2 means that the valve needle 3 cannot rotate relative to the anti-rotation sleeve 2.

[0030] In some preferred embodiments, an extension part 4 is provided on the surface of the fixed seat 1 close to the anti-rotation sleeve 2. The extension part 4 has a third through hole 41, and the side wall of the third through hole 41 has a fifth straight surface 42, and the fifth straight surface 42 is coplanar with the first straight surface 12. In specific applications, by providing the extension part 4 on the fixed seat 1, and providing the third through hole 41 communicating with the first through hole 11 in the extension part 4 and the fifth straight surface 42 coplanar with the first straight surface 12 on the side wall of the third through hole 41, it is equivalent to increasing the length of the first through hole 11 and the first straight surface 12, so that when the valve needle 3 and the anti-rotation sleeve 2 move relative to the fixed seat 1, one end of the anti-rotation sleeve 2 and the second straight surface 22 on the anti-rotation sleeve 2 can cooperate with the third through hole 41 and the fifth straight surface 42 on the extension part 4 to play a guiding and limiting role, so as to avoid the valve needle 3 rotating during the movement.

[0031] In some preferred embodiments, the depth of the groove 23 is greater than or equal to the thickness of the head of the valve needle 3. In specific applications, by designing the depth of the groove 23 to be greater than or equal to the thickness of the head of the valve needle 3, the head of the valve needle 3 can be received in the groove 23.

[0032] In some preferred embodiments, a plurality of positioning holes 13 are provided on the surface of the fixing base 1 away from the anti-rotation sleeve 2. In specific applications, the position of the fixing base 1 and the flow dividing plate B can be determined by the cooperation of the positioning pins and the positioning holes 13 to ensure accuracy and stability. Specifically, the number of the positioning holes 13 is two, and the two positioning holes 13 are arranged oppositely.

[0033] In some preferred embodiments, a receiving groove 14 communicating with the first through hole 11 is provided on the surface of the fixing base 1 away from the anti-rotation sleeve 2. In specific applications, a valve sleeve for guiding the valve needle 3 is provided on the flow dividing plate B, and the shape of the receiving groove 14 is adapted to the shape of the valve sleeve. In this way, when the fixing base 1 is installed on the flow dividing plate B, the receiving groove 14 can fix the valve sleeve to ensure its guiding accuracy.

[0034] In some preferred embodiments, a plurality of mounting holes 15 are provided on the fixing base 1. In specific applications, one end of a fastening bolt passes through the mounting hole 15 and is screwed to the flow dividing plate B to realize the installation and fixation of the fixing base 1. Specifically, the number of the mounting holes 15 is four, and the four mounting holes 15 are evenly distributed around the first through hole 11. In this way, the fixing base 1 can be uniformly stressed and firmly fixed.

[0035] In the second aspect, as Figure 4 and Figure 5 shown, the present invention provides a valve needle 3 driving structure, which includes the valve needle 3 anti-rotation assembly of the first aspect, and further includes a driving member. The driving member includes a base 5, a cylinder block 6, a cylinder head 7, a piston 8 and a connecting head 9. One end of the cylinder block 6 is connected to the base 5, and the other end of the cylinder block 6 is connected to the cylinder head 7. A cavity is formed among the base 5, the cylinder block 6 and the cylinder head 7; the piston 8 is arranged in the cavity and can move in the cavity; one end of the connecting head 9 passes through the base 5 and extends into the cavity to be connected to the piston 8 and is sleeved on the anti-rotation sleeve 2.

[0036] In specific applications, a mounting position adapted to the shape of the driving member is provided on the mounting plate A. The driving member is arranged in the mounting position, the fixing base 1 is arranged on the flow dividing plate B, and the valve needle 3 is connected to the connecting head 9 through the anti-rotation sleeve 2, so that it can move under the drive of the piston 8.

[0037] In summary, in one or more embodiments of the present invention, the valve needle anti-rotation assembly and the valve needle driving structure of the present invention realize the circumferential fixation of the valve needle through the cooperation of the third straight surface and the fourth straight surface and the cooperation of the second straight surface and the first straight surface, so as to avoid the rotation of the valve needle during the production process and affect the production quality.

[0038] The above are only the embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the scope of the claims of the present utility model.

Claims

1. A valve needle (3) anti-rotation assembly, characterized in that: include: A fixing seat (1), an anti-rotation sleeve (2) and a valve needle (3); the fixing seat (1) is provided with a first through hole (11), and the side wall of the first through hole (11) has a first straight surface (12); the anti-rotation sleeve (2) is provided with a second through hole (21), and the outer side wall of the anti-rotation sleeve (2) has a second straight surface (22); one end of the anti-rotation sleeve (2) is located in the first through hole (11), and the second straight surface (22) is in contact with the first straight surface (12); the side wall of the head of the valve needle (3) has a second straight surface (22) Three straight surfaces (31), a groove (23) connected to the second through hole (21) is provided on the end surface of the anti-rotation sleeve (2) away from the fixed seat (1), and the side wall of the groove (23) is provided with a fourth straight surface (24), after the end of the valve needle (3) away from its head passes through the second through hole (21) and the first through hole (11) in sequence, at least part of the head of the valve needle (3) is located in the groove (23), so that the third straight surface (31) is in contact with the fourth straight surface (24).

2. The valve needle (3) anti-rotation assembly according to claim 1, characterized in that: An extension portion (4) is provided on a surface of the fixing seat (1) close to the anti-rotation sleeve (2), wherein a third through hole (41) is provided in the extension portion (4), and a side wall of the third through hole (41) has a fifth straight surface (42), and the fifth straight surface (42) is coplanar with the first straight surface (12).

3. The valve needle (3) anti-rotation assembly according to claim 1, characterized in that: The depth of the groove (23) is greater than or equal to the thickness of the head of the valve needle (3).

4. The valve needle (3) anti-rotation assembly according to claim 1, characterized in that: A plurality of positioning holes (13) are provided on a surface of the fixing seat (1) away from the anti-rotation sleeve (2).

5. The valve needle (3) anti-rotation assembly according to claim 4, characterized in that: The number of the positioning holes (13) is two, and the two positioning holes (13) are arranged opposite to each other.

6. The valve needle (3) anti-rotation assembly according to claim 1, characterized in that: A receiving groove (14) communicating with the first through hole (11) is provided on a surface of the fixing seat (1) away from the anti-rotation sleeve (2).

7. The valve needle (3) anti-rotation assembly according to claim 1, characterized in that: The fixing seat (1) is provided with a plurality of mounting holes (15).

8. The valve needle (3) anti-rotation assembly according to claim 7, characterized in that: The number of the mounting holes (15) is four, and the four mounting holes (15) are evenly distributed with the first through hole (11) as the center.

9. A valve needle (3) driving structure, characterized in that: A valve needle (3) anti-rotation assembly comprising the valve needle (3) according to any one of claims 1 to 8.

10. The valve needle (3) driving structure according to claim 9, characterized in that: The invention also comprises a driving member, which comprises a base (5), a cylinder body (6), a cylinder cover (7), a piston (8) and a connecting head (9); one end of the cylinder body (6) is connected to the base (5), and the other end of the cylinder body (6) is connected to the cylinder cover (7); a cavity is formed among the base (5), the cylinder body (6) and the cylinder cover (7); The piston (8) is arranged in the cavity and is movable in the cavity; one end of the connector (9) penetrates the base (5) and extends into the cavity to be connected to the piston (8), and is sleeved on the anti-rotation sleeve (2).

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