Universal valve needle driving piece

Abstract

The utility model discloses a universal valve needle driving piece which comprises a cylinder cover, a cylinder body, a base, a piston, a connector and a gasket. One end of the cylinder body is connected with the cylinder cover, the other end of the cylinder body is connected with the base, and a cavity is formed among the cylinder cover, the cylinder body and the base; the piston is arranged in the cavity and can move in the cavity; one end of the connector penetrates through the base and extends into the cavity to be connected with the piston, and the connector is provided with a first through hole for the valve needle to penetrate through; the gasket is arranged at one end of the connector, the gasket cannot penetrate through the first through hole, a second through hole is formed in the gasket, the diameter of the second through hole is smaller than or equal to that of the first through hole, and the diameter of the second through hole is smaller than that of the head of the valve needle. According to the universal valve needle driving piece, the connector is matched with the gasket, so that a piston can be matched with valve needles of various specifications, the piston can be produced in a standardized mode, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hot runner molds, and specifically, to a universal valve needle driving part. Background Art

[0002] In a hot runner mold, a valve needle is usually driven by a cylinder or an oil cylinder. One end of the valve needle is installed on a piston, and the movement of the piston drives the valve needle to move. However, the specifications of the valve needles required in different environments are different, and each piston can only be adapted to one specification of the valve needle. This requires multiple pistons to adapt to multiple specifications of the valve needles, resulting in non-standardized production of the pistons and increasing the production cost.

[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 universal valve needle driving part, which can be adapted to multiple specifications of valve needles to reduce the production cost.

[0005] A universal valve needle driving part provided by the utility model includes: a cylinder head, a cylinder body, a base, a piston, a connecting head and a gasket; one end of the cylinder body is connected to the cylinder head, the other end of the cylinder body is connected to the base, and a cavity is formed among the cylinder head, the cylinder body and the base; 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 with the piston, and the connecting head has a first through hole for the valve needle to pass through; the gasket is arranged at one end of the connecting head, the gasket cannot pass through the first through hole, the gasket is provided with a second through hole, the diameter of the second through hole is less than or equal to the diameter of the first through hole, and the diameter of the second through hole is less than the diameter of the head of the valve needle.

[0006] According to an embodiment of the utility model, the end of the connecting head close to the piston has a receiving groove communicated with the first through hole, and the gasket is located in the receiving groove.

[0007] According to an embodiment of the utility model, the sum of the thickness of the gasket and the thickness of the head of the valve needle is less than the depth of the receiving groove.

[0008] According to an embodiment of the utility model, the shape of the receiving groove is adapted to the shape of the gasket.

[0009] According to an embodiment of the utility model, the end of the piston close to the connecting head has a mounting groove, and one end of the connecting head extends into the mounting groove.

[0010] According to an embodiment of the present utility model, a first sealing groove is provided on the end face of one end of the above-mentioned connector. A first sealing ring is provided in the first sealing groove, and the first sealing ring abuts against the piston.

[0011] According to an embodiment of the present utility model, a second sealing groove is provided on the outer side wall of the above-mentioned piston. A second sealing ring is provided in the second sealing groove, and the second sealing ring abuts against the inner side wall of the cylinder block.

[0012] According to an embodiment of the present utility model, the number of the above-mentioned second sealing grooves is multiple.

[0013] The beneficial effect of the present utility model is that: the universal valve needle driving part of the present utility model is matched with a gasket through a connector, so that a kind of piston can be adapted to valve needles of multiple specifications, thereby enabling the piston to be produced in a standardized manner to reduce production costs. Description of the Drawings

[0014] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0015] Figure 1 It is a schematic structural diagram of the universal valve needle driving part in the embodiment of the present utility model;

[0016] Figure 2 It is a schematic structural diagram of the cooperation between the universal valve needle driving part and the valve needle in the embodiment of the present utility model;

[0017] Figure 3 It is a cross-sectional view of the cooperation between the universal valve needle driving part and the valve needle in the embodiment of the present utility model.

[0018] Description of the Reference Numerals:

[0019] 1. Cylinder head; 2. Cylinder block; 3. Base; 4. Piston; 41. Installation groove; 42. Second sealing groove; 5. Connector; 51. First through hole; 52. Accommodation groove; 53. First sealing groove; 6. Gasket; 61. Second through hole; 7. Cavity; 8. Valve needle. Detailed Embodiments

[0020] Hereinafter, multiple embodiments of the present utility model will be disclosed with reference to the drawings. For the sake of clarity, many practical details will be described together in the following description. However, it should be understood that these practical details are not used to limit the present utility model. That is to say, in some embodiments of the present utility model, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some well-known and commonly used structures and components will be shown in a simple schematic manner in the drawings.

[0021] 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, movement conditions, etc. between components in a specific posture (as shown in the attached drawings). If this specific posture changes, the directional indications will also change accordingly.

[0022] 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. They are 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, the features defined with "first" and "second" can explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. 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.

[0023] To further understand the content, characteristics and effects of the present utility model, the following embodiments are exemplified and described in detail with reference to the attached drawings as follows:

[0024] As Figure 1 , Figure 2 and Figure 3 shown, a general-purpose valve needle driving member provided by the present utility model includes a cylinder head 1, a cylinder body 2, a base 3, a piston 4, a connecting head 5 and a gasket 6. One end of the cylinder body 2 is connected to the cylinder head 1, and the other end of the cylinder body 2 is connected to the base 3. A cavity 7 is formed among the cylinder head 1, the cylinder body 2 and the base 3. The piston 4 is arranged in the cavity 7 and can move in the cavity 7. One end of the connecting head 5 penetrates through the base 3 and extends into the cavity 7 to be connected with the piston 4. The connecting head 5 has a first through hole 51 for the valve needle 8 to pass through. The gasket 6 is arranged at one end of the connecting head 5. The gasket 6 cannot pass through the first through hole 51. A second through hole 61 is provided on the gasket 6. The diameter of the second through hole 61 is less than or equal to the diameter of the first through hole 51, and the diameter of the second through hole 61 is less than the diameter of the head of the valve needle 8.

[0025] Through the above technical solution, when different specifications of valve needles 8 are needed, only the gasket 6 of the general-purpose valve needle driving member needs to be replaced, so that the general-purpose valve needle driving member can be adaptively connected with different specifications of valve needles 8, without replacing the piston 4, enabling one type of piston 4 to be adapted to multiple specifications of valve needles 8. Thus, only one type of piston 4 needs to be standardized for production, thereby reducing the production cost; in addition, replacing only the gasket 6 is faster and more efficient.

[0026] It can be understood that the diameters of the second through holes 61 on each gasket 6 are different to match valve needles 8 of different specifications.

[0027] In some preferred embodiments, one end of the above-mentioned connector 5 close to the piston 4 has a receiving groove 52 communicating with the first through hole 51, and the gasket 6 is located in the receiving groove 52. In specific applications, by providing a receiving cavity on the connector 5, the receiving cavity can accommodate the gasket 6, so that when the gasket 6 is installed or removed, the gasket 6 is not easily dropped. Specifically, the receiving groove 52 is adapted to the shape of the gasket 6. With such a design, the receiving groove 52 can limit the gasket 6 in the radial direction, so that the rod portion of the valve needle 8 can more easily pass through the second through hole 61 on the gasket 6 and the first through hole 51 on the connector 5.

[0028] In some preferred embodiments, the sum of the thickness of the above-mentioned gasket 6 and the thickness of the head of the valve needle 8 is less than the depth of the receiving groove 52. In specific applications, by designing the sum of the thickness of the gasket 6 and the thickness of the head of the valve needle 8 to be less than the depth of the receiving groove 52, interference between the head of the valve needle 8 and the piston 4 is avoided after the valve needle 8 is connected to the general-purpose valve needle driving member.

[0029] In some preferred embodiments, one end of the above-mentioned piston 4 close to the connector 5 has a mounting groove 41, and one end of the connector 5 extends into the mounting groove 41. In specific applications, by providing a mounting groove 41 on the piston 4 and making one end of the connector 5 extend into the mounting groove 41, the overall length of the assembled general-purpose valve needle driving member can be relatively reduced to be applicable to more application scenarios.

[0030] In some preferred embodiments, a first sealing groove 53 is provided on the end face of one end of the above-mentioned connector 5, a first sealing ring is provided in the first sealing groove 53, and the first sealing ring abuts against the piston 4. In specific applications, the first sealing ring in the first sealing groove 53 seals the gap between the connector 5 and the piston 4 to prevent the oil or gas in the cavity 7 from flowing out through the gap between the connector 5 and the piston 4 and the first through hole 51.

[0031] In some preferred embodiments, a second sealing groove 42 is provided on the outer side wall of the above-mentioned piston 4, a second sealing ring is provided in the second sealing groove 42, and the second sealing ring abuts against the inner side wall of the cylinder block 2. In specific applications, the piston 4 divides the cavity 7 into a first cavity and a second cavity. The second sealing ring in the second sealing groove 42 seals the gap between the piston 4 and the cylinder block 2 to prevent the oil or gas in the first cavity from flowing back and forth with the oil or gas in the second cavity, which affects the normal use of the general-purpose valve needle driving member. Specifically, the number of the second sealing grooves 42 is multiple, and second sealing cavities are provided in all the multiple second sealing grooves 42. In this way, the sealing effect is further improved.

[0032] In summary, in one or more embodiments of the present utility model, the general valve needle driver of the present utility model cooperates with a gasket through a connector, enabling a piston to adapt to valve needles of multiple specifications, so that the piston can be produced in a standardized manner to reduce production costs.

[0033] The above description is only for the embodiments of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. 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 universal valve needle drive component, characterized in that: The invention comprises a cylinder cover (1), a cylinder body (2), a base (3), a piston (4), a connecting head (5) and a gasket (6); one end of the cylinder body (2) is connected to the cylinder cover (1), the other end of the cylinder body (2) is connected to the base (3), and a cavity (7) is formed among the cylinder cover (1), the cylinder body (2) and the base (3); the piston (4) is arranged in the cavity (7) and can move in the cavity (7); one end of the connecting head (5) penetrates the base (3) and extends into the cavity (7); The cavity (7) is connected to the piston (4), and the connecting head (5) has a first through hole (51) for the valve needle (8) to pass through; the gasket (6) is arranged at one end of the connecting head (5), and the gasket (6) cannot pass through the first through hole (51), and the gasket (6) is provided with a second through hole (61), the diameter of the second through hole (61) is less than or equal to the diameter of the first through hole (51), and the diameter of the second through hole (61) is smaller than the diameter of the head of the valve needle (8).

2. The universal valve needle driving member according to claim 1, characterized in that: The end of the connecting head (5) close to the piston (4) has a receiving groove (52) connected to the first through hole (51), and the gasket (6) is located in the receiving groove (52).

3. The universal valve needle driving member according to claim 2, characterized in that: The sum of the thickness of the gasket (6) and the thickness of the head of the valve needle (8) is less than the depth of the accommodating groove (52).

4. The universal valve needle driving member according to claim 2, characterized in that: The receiving groove (52) is adapted to the shape of the gasket (6).

5. The universal valve needle driving member according to claim 1, characterized in that: An end of the piston (4) close to the connecting head (5) has a mounting groove (41), and one end of the connecting head (5) extends into the mounting groove (41).

6. The universal valve needle driving member according to claim 1, characterized in that: A first sealing groove (53) is provided on the end surface of one end of the connecting head (5), a first sealing ring is provided in the first sealing groove (53), and the first sealing ring abuts against the piston (4).

7. The universal valve needle driving member according to claim 1, characterized in that: The outer side wall of the piston (4) is provided with a second sealing groove (42), a second sealing ring is provided in the second sealing groove (42), and the second sealing ring abuts against the inner side wall of the cylinder body (2).

8. The universal valve needle driving member according to claim 7, characterized in that: The number of the second sealing grooves (42) is plural.

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