Stroke-adjustable oil cylinder structure, injection molding nozzle and injection molding device

Abstract

The oil cylinder structure with the adjustable stroke comprises an injection molding nozzle and an injection molding device. The oil cylinder structure comprises an adjusting outer seat, a cylinder body, a connecting rod, an oil cylinder fixing seat and a piston; one end of the connecting rod is connected to the adjusting outer seat, and the other end is connected to the oil cylinder fixing seat; one end of the piston moves in the inner cavity of the cylinder body in a limited manner; the other end of the piston extends out of the inner cavity and relatively moves on the oil cylinder fixing seat; the cylinder body is positioned between the adjusting outer seat and the oil cylinder fixing seat; the cylinder body is in threaded fit with the adjusting outer base, and the threaded fit degree of the cylinder body and the adjusting outer base is adjusted to drive the cylinder body to be close to or away from the oil cylinder fixing base so as to adjust the relative position of the piston on the oil cylinder fixing base. According to the scheme, the position of the piston can be adjusted only by adjusting the thread fit degree of the adjusting outer seat and the cylinder body, so that the stroke of the piston is controlled, the stroke of the oil cylinder is controllable, and the problem that the stroke of an existing oil cylinder piston cannot be finely adjusted and needs to be frequently disassembled and adjusted is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of oil cylinder structure, especially a stroke adjustable oil cylinder structure, injection molding nozzle and injection molding device. BACKGROUND

[0002] The existing oil cylinder structure has only two moving endpoints for the piston, and the piston of the oil cylinder cannot be quickly adjusted in stroke according to actual conditions due to the limitation of the structure of the oil cylinder structure, so that the oil cylinder needs to be frequently replaced or disassembled to adjust the position of the piston during actual application, resulting in a decrease in the use flexibility of the piston and a decrease in the injection molding application. SUMMARY

[0003] The utility model discloses a stroke adjustable oil cylinder structure, which only needs to adjust the threaded cooperation degree of the adjusting outer seat and the cylinder body to adjust the position of the piston, thereby controlling the stroke of the piston and providing the oil cylinder with the advantage of controllable stroke.

[0004] The utility model further discloses an injection molding nozzle, which is provided with the above oil cylinder structure.

[0005] The utility model further discloses an injection molding device, which is provided with the above injection molding nozzle.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A stroke adjustable oil cylinder structure comprises an adjusting outer seat, a cylinder body, a connecting rod, an oil cylinder fixing seat and a piston.

[0008] One end of the connecting rod is connected to the adjusting outer seat, and the other end of the connecting rod is connected to the oil cylinder fixing seat; one end of the piston is limited to move in the inner cavity of the cylinder body; the other end of the piston extends out of the inner cavity and moves relative to the oil cylinder fixing seat.

[0009] The cylinder body is located between the adjusting outer seat and the oil cylinder fixing seat; the cylinder body is threadedly connected to the adjusting outer seat, and the threaded cooperation degree of the two is adjusted to drive the cylinder body to move close to or away from the oil cylinder fixing seat, so as to adjust the relative position of the piston in the oil cylinder fixing seat.

[0010] Optimally, the cylinder body is provided with a rod groove, and the connecting rod moves relative to the rod groove.

[0011] Optimally, the adjusting screw further comprises a screw rod, a screw head and a screw body.

[0012] The screw rod of the adjusting screw passes through the outer seat hole of the adjusting outer seat and is threadedly connected to the cylinder outer hole of the cylinder body; and the screw head of the adjusting screw is adjusted to rotate in the outer seat hole.

[0013] The end of the piston is provided with a moving block, which is limited to move in the inner cavity.

[0014] The inner cavity is provided with a pair of oil passage channels, and the moving block moves between the two oil passage channels.

[0015] The outer sidewall of the piston and / or the inner sidewall of the inner cavity is provided with an annular sealing groove, and a sealing ring is installed in the annular sealing groove.

[0016] The inner cavity and the piston are provided with a rotation prevention column and a rotation prevention groove, respectively; the rotation prevention column is limited to move in the rotation prevention groove in the moving direction of the piston.

[0017] The cylinder is provided with a movable port connected to the inner cavity; the piston is coaxially installed in the movable port.

[0018] The rotation prevention column and the rotation prevention groove are linearly aligned, and the linear position deviates from the axis a of the movable port, thereby limiting the rotation of the piston in the movable port.

[0019] The inner diameter of the slot of the rotation prevention groove gradually increases in the direction away from the rotation prevention column, so that the inner wall of the slot of the rotation prevention groove forms an inclined guide surface.

[0020] An injection nozzle is installed with a valve needle and the stroke-adjustable oil cylinder structure.

[0021] The valve needle is installed in the piston.

[0022] An injection device is provided with a flow distribution plate and the injection nozzle; the injection nozzle is installed in the flow distribution plate.

[0023] Compared with the prior art, one of the technical solutions has the following beneficial effects:

[0024] The stroke-adjustable oil cylinder structure only needs to adjust the threaded cooperation degree of the outer seat and the cylinder to adjust the position of the piston, thereby controlling the stroke of the piston, providing the advantage of stroke-controllable oil cylinder, and solving the problem that the stroke of the piston of the existing oil cylinder cannot be finely adjusted and needs to be frequently disassembled and adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic diagram of one embodiment of the oil cylinder structure;

[0026] Figure 2 is Figure 1 is an enlarged view of A part in

[0027] Figure 3 is a structural schematic diagram of one embodiment of the injection device;

[0028] Wherein:

[0029] Adjusting outer seat 1, cylinder 2, connecting rod 3, oil cylinder fixed seat 4, piston 5; Adjusting screw 6; Valve needle 7; Splitter plate 8; Injection nozzle 9;

[0030] Outer seat hole 11; Inner cavity 20; Rod groove 21; Cylinder outer hole 22; Oil passage 23; Annular sealing groove 24; Sealing ring 25; Movable port 26;

[0031] Moving block 51; Anti-rotation column 52; Anti-rotation groove 53; Lead-in inclined surface 54. DETAILED DESCRIPTION

[0032] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application.

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", "inner side", "outer side", "inner end", "outer end", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the features limited as "first" and "second" can explicitly or implicitly include one or more of the features, which are used to distinguish the described features, and have no order or weight. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0034] As Figures 1-3 , a stroke-adjustable oil cylinder structure, comprising: adjusting outer seat 1, cylinder 2, connecting rod 3, oil cylinder fixed seat 4 and piston 5;

[0035] One end of the connecting rod 3 is connected to the adjusting outer seat 1, and the other end of the connecting rod 3 is connected to the oil cylinder fixed seat 4; One end of the piston 5 is limited to move in the inner cavity 20 of the cylinder 2; The other end of the piston 5 extends out of the inner cavity 20 and moves relative to the oil cylinder fixed seat 4;

[0036] The cylinder body 2 is located between the adjusting outer seat 1 and the oil cylinder fixing seat 4; the cylinder body 2 is threadedly fitted to the adjusting outer seat 1, and the threaded fitting degree of the two is adjusted to drive the cylinder body 2 to move close to or away from the oil cylinder fixing seat 4, so as to adjust the relative position of the piston 5 in the oil cylinder fixing seat 4.

[0037] The scheme provides an oil cylinder structure with adjustable stroke, which only needs to adjust the threaded fitting degree of the adjusting outer seat 1 and the cylinder body 2 to adjust the position of the piston 5, thereby controlling the stroke of the piston 5, and providing the oil cylinder with the advantage of controllable stroke, solving the problem that the stroke of the piston 5 of the existing oil cylinder cannot be finely adjusted and needs to be frequently disassembled and adjusted.

[0038] Specifically, the cylinder body 2 is located between the adjusting outer seat 1 and the oil cylinder fixing seat 4, as shown in Figure 1 , the adjusting outer seat 1, the cylinder body 2 and the oil cylinder fixing seat 4 are sequentially distributed; the adjusting outer seat 1 and the oil cylinder fixing seat 4 are connected through the connecting rod 3; at the same time, the cylinder body 2 is threadedly fitted to the adjusting outer seat 1, that is, one of the two is provided with an external thread structure, the other of the two is provided with an internal thread structure, and the external thread structure is fitted with the internal thread structure; as known to the public, when the external thread structure is relatively rotated in the internal thread structure, the two will relatively linearly move; thus, when the threaded fitting degree of the adjusting outer seat 1 and the cylinder body 2 is adjusted, the two can move towards each other or move away from each other; when the adjusting outer seat 1 and the cylinder body 2 move towards each other, the cylinder body 2 moves away from the oil cylinder fixing seat 4; when the adjusting outer seat 1 and the cylinder body 2 move away from each other, the cylinder body 2 moves close to the oil cylinder fixing seat 4; and the piston 5 is limited to move in the inner cavity 20 of the cylinder body 2, and the movement of the cylinder body 2 will drive the piston 5 to move, thereby adjusting the relative position of the piston 5 in the oil cylinder fixing seat 4; generally, the oil cylinder fixing seat 4 is the fixed end of the entire oil cylinder, which is used to fix the entire oil cylinder on a carrier, for example, on a flow distribution plate 8; thus, the position of the oil cylinder fixing seat 4 is fixed, and at this time, only the threaded fitting degree of the adjusting outer seat 1 and the cylinder body 2 needs to be adjusted, so as to drive the piston 5 to relatively move on the carrier, thereby making the stroke of the piston 5 adjustable, solving the problem that the stroke of the piston 5 of the existing oil cylinder cannot be finely adjusted and needs to be frequently disassembled and adjusted.

[0039] Optimally, the cylinder body 2 is provided with a rod groove 21, and the connecting rod 3 relatively moves in the rod groove 21.

[0040] Beneficial effects:

[0041] In some embodiments, the cylinder body 2 can be arranged outside the cylinder body 2; and in a more optimal implementation, the connecting rod 3 can pass through the rod groove 21 of the cylinder body 2; the limiting action between the rod groove 21 and the cylinder body 2 can provide a guiding action for the relative movement of the cylinder body 2, making the movement of the cylinder body 2 more smooth.

[0042] Optimally, it further comprises an adjusting screw 6.

[0043] The screw rod of the adjusting screw 6 passes through the outer seat hole 11 of the adjusting outer seat 1 and is threadedly connected to the cylinder outer hole 22 of the cylinder body 2; the screw head of the adjusting screw 6 is rotationally adjusted in the outer seat hole 11.

[0044] The threadedly connected mode of the adjusting outer seat 1 and the cylinder body 2 in the present solution can be determined according to requirements, and in the optimal implementation, the screw head of the adjusting screw 6 is located in the outer seat hole 11 of the adjusting outer seat 1, and the screw rod of the adjusting screw 6 is inserted into and threadedly connected to the cylinder outer hole 22 of the cylinder body 2. In this way, the two ends of the adjusting screw 6 are respectively connected to the cylinder body 2 and the adjusting outer seat 1; the outer seat hole 11 is located in the adjusting outer seat 1, i.e., at the outermost side of the oil cylinder structure, and can be directly adjusted by using a screwdriver.

[0045] Optimally, one end of the piston 5 is provided with a moving block 51 which is limited to move in the inner cavity 20.

[0046] The inner cavity 20 is provided with a pair of oil passage channels 23, and the moving block 51 moves between the two oil passage channels 23.

[0047] The present solution preferably uses a double-oil-channel structure to drive the piston 5 to move; specifically, the moving block 51 at one end of the piston 5 is located between the two oil passage channels 23 of the inner cavity 20, and a single oil passage channel 23 can be filled with oil or drained of oil according to requirements; for example Figure 1 When the lower oil passage channel 23 is filled with oil and the upper oil passage channel 23 is drained of oil, the piston 5 can be moved upward; when the upper oil passage channel 23 is filled with oil and the lower oil passage channel 23 is drained of oil, the piston 5 can be moved downward, thereby achieving the reset movement of the piston 5.

[0048] Optimally, the outer side wall of the piston 5 and / or the inner side wall of the inner cavity 20 is provided with an annular sealing groove 24, and the annular sealing groove 24 is installed with a sealing ring 25.

[0049] The piston 5 and / or the inner cavity 20 of the present solution are provided with annular sealing grooves 24 which can be used to accommodate sealing rings 25, thereby forming an oil separation structure between the contact surfaces of the piston 5 and the inner cavity 20 to prevent oil leakage.

[0050] Optimally, one of the inner cavity 20 and the piston 5 is provided with an anti-rotation column 52, and the other is provided with an anti-rotation groove 53; the anti-rotation column 52 is limited to move in the anti-rotation groove 53 in the moving direction of the piston 5.

[0051] The present solution can use the anti-rotation column 52 to provide a guiding effect for the relative movement of the piston 5; specifically, one of the inner cavity 20 and the piston 5 is provided with an anti-rotation column 52, and the other is provided with an anti-rotation groove 53; for example Figure 1The inner cavity 20 is provided with an anti-rotation column 52, and the piston 5 is provided with an anti-rotation groove 53; when the piston 5 moves, the anti-rotation column 52 moves relative to the anti-rotation groove 53; under the relative limiting action of the anti-rotation column 52 and the anti-rotation groove 53, the piston 5 can be provided with a guiding action, so that the piston 5 keeps linear movement.

[0052] Optimally, the cylinder 2 is provided with a movable port 26 which is communicated with the inner cavity 20; the piston 5 is coaxially installed on the movable port 26.

[0053] The anti-rotation column 52 and the anti-rotation groove 53 are linearly aligned, and the linear position deviates from the axis a of the movable port 26, so as to limit the rotation of the piston 5 in the movable port 26.

[0054] In addition to the guiding action, the anti-rotation column 52 can also limit the rotation of the piston 5, so as to prevent the rotation of the connecting member (for example, the valve needle 7) of the piston 5; specifically, the inner cavity 20 is provided with the movable port 26 at a position close to the outside, and the piston 5 extends out of the inner cavity 20 through the movable port 26; generally, if there is no anti-rotation column 52, the piston 5 can rotate around the axis of the movable port 26, so that the connecting member connected therewith rotates, and can have a rotating tendency during movement, which affects the movement stability. In this regard, the piston 5 is coaxially installed on the movable port 26 according to the present scheme; however, the anti-rotation column 52 and the anti-rotation groove 53 are linearly aligned, that is, the linear position deviates from the axis of the piston 5, so that the piston 5 cannot rotate around the axis of the movable port 26 under the action of the anti-rotation column, thereby limiting the angle of the piston 5, so as to limit the rotation of the piston 5 in the movable port 26, and ensure the movement stability of the connecting member.

[0055] Optimally, the inner diameter of the slot of the anti-rotation groove 53 gradually increases in the direction away from the anti-rotation column 52, so that the inner wall of the slot of the anti-rotation groove 53 forms a guide inclined surface 54.

[0056] The slot of the anti-rotation groove 53 is specially designed in the present scheme; in the optimal embodiment, the inner diameter of the slot of the anti-rotation groove 53 gradually decreases in the depth direction (that is, the direction away from the anti-rotation column 52), so that the guide inclined surface 54 is formed; when the anti-rotation column 52 extends into the anti-rotation groove 53, the slot of the anti-rotation groove 53 is provided with the largest inner diameter at the nearest end of the anti-rotation column 52, and the anti-rotation column 52 can be guided to extend into the anti-rotation groove 53 through the guide inclined surface 54, so that the anti-rotation column 52 can conveniently enter the inner part of the anti-rotation groove 53 through the slot of the anti-rotation groove 53, and the installation difficulty of the anti-rotation column 52 is reduced.

[0057] An injection nozzle is installed with a valve needle 7 and the above-mentioned stroke-adjustable oil cylinder structure.

[0058] The valve needle 7 is installed on the piston 5.

[0059] The oil cylinder structure of the scheme is preferably applied to the injection nozzle 9, and only the threaded fitting degree of the outer seat 1 and the cylinder body 2 needs to be adjusted to adjust the position of the piston 5, so that the stroke of the valve needle 7 is quickly adjusted, and the oil cylinder structure does not need to be frequently disassembled to adjust the stroke of the piston 5.

[0060] An injection molding device is provided with a flow distribution plate 8 and the injection molding nozzle 9 described above; the injection molding nozzle 9 is installed on the flow distribution plate 8.

[0061] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A hydraulic cylinder structure with adjustable stroke, characterized in that, The adjustable cylinder structure comprises: an adjusting outer seat, a cylinder body, a connecting rod, a cylinder fixing seat and a piston; one end of the connecting rod is connected to the adjusting outer seat, and the other end of the connecting rod is connected to the cylinder fixing seat; one end of the piston is limited to move in the inner cavity of the cylinder body, and the other end of the piston extends out of the inner cavity and moves relative to the cylinder fixing seat; the cylinder body is located between the adjusting outer seat and the cylinder fixing seat; the cylinder body is screwed to the adjusting outer seat, and the degree of screwing of the two is adjusted to drive the cylinder body to move close to or away from the cylinder fixing seat, so as to adjust the relative position of the piston in the cylinder fixing seat.

2. The stroke-adjustable oil cylinder structure according to claim 1, wherein The cylinder body is provided with a rod groove, and the connecting rod moves relative to the rod groove.

3. The stroke-adjustable oil cylinder structure according to claim 1, characterized by The adjustable cylinder structure further comprises: an adjusting screw; the screw rod of the adjusting screw passes through the outer seat hole of the adjusting outer seat and is screwed to the outer cylinder hole of the cylinder body; the screw head of the adjusting screw is adjusted to rotate in the outer seat hole.

4. The stroke-adjustable oil cylinder structure according to claim 1, wherein One end of the piston is provided with a moving block, and the moving block is limited to move in the inner cavity; the inner cavity is provided with a pair of oil passage channels, and the moving block moves between the two oil passage channels.

5. The stroke-adjustable oil cylinder structure according to claim 4, wherein The outer side wall of the piston and / or the inner side wall of the inner cavity is provided with an annular sealing groove, and a sealing ring is installed in the annular sealing groove.

6. The stroke-adjustable oil cylinder structure according to any one of claims 1 to 5, characterized by One of the inner cavity and the piston is provided with an anti-rotation column, and the other is provided with an anti-rotation groove; the anti-rotation column is limited to move in the anti-rotation groove in the moving direction of the piston.

7. The stroke-adjustable oil cylinder structure according to claim 6, wherein The cylinder body is provided with a movable port communicating with the inner cavity; the piston is coaxially installed in the movable port; the anti-rotation column and the anti-rotation groove are linearly aligned, and the linear position deviates from the axis a of the movable port, thereby limiting the rotation of the piston in the movable port.

8. The stroke-adjustable oil cylinder structure according to claim 6, wherein The inner diameter of the slot of the anti-rotation groove gradually increases in the direction away from the anti-rotation column, so that the inner wall of the slot of the anti-rotation groove forms a guide inclined surface.

9. An injection molding nozzle characterized by, a valve needle and the stroke-adjustable cylinder structure of any one of claims 1-8 are installed; the valve needle is installed in the piston.

10. An injection molding apparatus characterized by comprising: a shunt plate and the injection nozzle of claim 9 are provided; the injection nozzle is installed in the shunt plate.

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