Oil cylinder structure of single oil pipe, injection molding nozzle and injection molding device

Abstract

The oil cylinder structure of the single oil pipe comprises an injection molding nozzle and an injection molding device. The oil cylinder structure comprises a cylinder body, a piston and a spring, the cylinder body is provided with an inner cavity, one end of the inner cavity is provided with a cavity bottom wall, and the other opposite end of the inner cavity is provided with a movable opening communicated with the outside. A pressing step is arranged between the inner cavity and the movable opening; the piston is movably installed in the movable opening, one end of the piston is provided with a movable block moving in the inner cavity, and the other end of the piston extends out of the inner cavity. The spring is arranged in the inner cavity, one end of the spring is in contact with the cavity bottom wall, and the other end of the spring presses the moving block on the pressing step; the cylinder body is provided with an oil way channel, and one port of the oil way channel is located on the pressing step. According to the scheme, the piston can be driven by a single oil pipe to move, and the problem that a double-oil-pipe structure of an existing oil cylinder needs oil feeding and oil discharging respectively is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of oil cylinder structure, especially single oil pipe's oil cylinder structure, injection molding nozzle and injection molding device. BACKGROUND

[0002] The existing oil cylinder structure generally is equipped with two oil paths, the piston of the oil cylinder is arranged between the two oil paths, oil liquid is respectively introduced into one of the oil paths, and the oil liquid is discharged to the other oil path, so that the reset movement of the piston can be realized. Thus, the existing oil cylinder needs to use at least two oil paths. Meanwhile, the piston requires a large guide in the cylinder body, which limits the structure of the oil cylinder, causes the oil cylinder installation process to be complicated, and thus affects the daily maintenance of the oil cylinder. SUMMARY

[0003] The utility model discloses a kind of single oil pipe's oil cylinder structure, piston is pressed to compression step using spring, and the port of oil path passage is set on compression step, single oil pipe driven piston movement can be realized.

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

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

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A single oil pipe's oil cylinder structure, comprising: cylinder body, piston and spring;

[0008] The cylinder body is provided with an inner cavity, a cavity bottom wall is provided at one end of the inner cavity, and a movable port communicating with the outside is provided at the other opposite end of the inner cavity;A compression step is provided between the inner cavity and the movable port;The piston is movably installed in the movable port, one end of the piston is provided with a moving block moving in the inner cavity, and the other end of the piston extends out of the inner cavity;The spring is arranged in the inner cavity, one end of the spring contacts the cavity bottom wall, and the other end of the spring presses the moving block against the compression step;

[0009] The cylinder body is provided with an oil path passage, and one of the ports of the oil path passage is located at the compression step.

[0010] Optimally, it further comprises a matching block.

[0011] One end of the matching block is limited to the spring, and the other end of the matching block is provided with a hemispherical surface;The moving block is provided with an arc-shaped groove on the side away from the compression step, and the spring presses the hemispherical surface against the arc-shaped groove.

[0012] Optimally, the fitting block is provided with a clamping joint at one end away from the hemispherical face, and an annular boss is further provided between the clamping joint and the hemispherical face.

[0013] The clamping joint extends into the inner ring of the spring, and the spring abuts against the annular boss at one end away from the cavity bottom wall.

[0014] Optimally, the outer ring of the spring is close to the inner side wall of the inner cavity.

[0015] Optimally, the cylinder body comprises a through shell and a cover plate.

[0016] The through shell is provided with the inner cavity; the cover plate is detachably mounted on the opening at one end of the through shell, and the cover plate forms the cavity bottom wall on one side of the through shell; and the other end of the through shell is provided with the movable port.

[0017] Optimally, further comprising a fixing screw.

[0018] The fixing screw fixes the cover plate to the through shell.

[0019] Optimally, further comprising an oil cylinder fixing seat and a fixing screw.

[0020] The oil cylinder fixing seat is located at the movable port; the fixing screw passes through the cover plate, the through shell and the oil cylinder fixing seat in sequence, and detachably connects the cover plate, the through shell and the oil cylinder fixing seat together; and one end of the piston moves relative to the oil cylinder fixing seat.

[0021] Optimally, one of the ports of the oil passage is located on the outer side wall of the cylinder body.

[0022] An injection nozzle is provided with a valve needle and the single-oil-pipe oil cylinder structure.

[0023] The valve needle is mounted on the piston.

[0024] An injection device is provided with a flow distribution plate and the injection nozzle; and the injection nozzle is mounted on the flow distribution plate.

[0025] Compared with the prior art, one of the technical solutions has the following beneficial effects:

[0026] The single-oil-pipe oil cylinder structure uses a spring to press the moving block of the piston against the pressing step, and sets a port of an oil passage on the pressing step, so that the single-oil-pipe oil cylinder structure can drive the piston to move, and the problem that the double-oil-pipe structure of the existing oil cylinder needs to be separately filled with oil and drained is solved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1is a structural schematic view of one embodiment of the oil cylinder structure;

[0028] Fig. 2 is a structural schematic view of one embodiment of the injection molding device.

[0029] wherein:

[0030] cylinder body 1, piston 2, spring 3, matching block 4, fixing screw 5, oil cylinder fixing base 7, valve needle 8, injection molding nozzle 9, flow distribution plate 10;

[0031] inner cavity 11, cavity bottom wall 12, movable port 13, compression step 14, oil passage 15, through housing 16, cover plate 17, moving block 21, arc-shaped groove 22, semispherical surface 41, clamping joint 42, annular boss 43. DETAILED DESCRIPTION

[0032] The embodiments of the present application are 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 defined 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 importance. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0034] As Figs. 1-2 , a single oil pipe oil cylinder structure, comprising: cylinder body 1, piston 2 and spring 3;

[0035] The cylinder body 1 is provided with an inner cavity 11, one end of the inner cavity 11 is provided with a cavity bottom wall 12, and the other opposite end of the inner cavity 11 is provided with a movable port 13 communicated with the outside; the inner cavity 11 is provided with a compression step 14 communicated with the movable port 13; the piston 2 is movably installed in the movable port 13, one end of the piston 2 is provided with a moving block 21 movably installed in the inner cavity 11, and the other end of the piston 2 extends out of the inner cavity 11; the spring 3 is arranged in the inner cavity 11, one end of the spring 3 is in contact with the cavity bottom wall 12, and the other end of the spring 3 compresses the moving block 21 to the compression step 14.

[0036] The cylinder body 1 is provided with an oil passage 15, and one end of the oil passage 15 is located at the compression step 14.

[0037] The present scheme provides a single-oil-pipe oil cylinder structure, which uses a spring 3 to compress a moving block 21 of a piston 2 to a compression step 14 and arranges a port of an oil passage 15 on the compression step 14, so that the piston 2 can be driven to move by a single-oil-pipe, and the problem that an existing oil cylinder needs to be respectively filled with oil and discharged is solved.

[0038] Specifically, the cylinder body 1 is provided with an inner cavity 11, and the inner cavity 11 is provided with a cavity bottom wall 12 and a movable port 13 at two opposite ends of the inner cavity 11; the inner cavity 11 is provided with a compression step 14 communicated with the movable port 13; the piston 2 is installed in the movable port 13, and the piston 2 can move relative to the movable port 13, so that the moving block 21 of the piston 2 can be limited to move in the inner cavity 11; the inner cavity 11 is provided with a spring 3, the spring 3 is in a compressed state, one end of the spring 3 directly or indirectly contacts the cavity bottom wall 12, and the other end of the spring 3 directly or indirectly compresses the moving block 21 of the piston 2 to the compression step 14 between the inner cavity 11 and the movable port 13; the cylinder body 1 is provided with an oil passage 15 for oil input and output, and the compression step 14 is provided with a port of the oil passage 15, so that oil can be output from the compression step 14 to contact the moving block 21; under the action of hydraulic pressure, the oil can drive the moving block 21 to overcome the elastic force of the spring 3, so that the moving block 21 is separated from the compression step 14, the piston 2 moves towards the cavity bottom wall 12, and a connecting member (for example, a valve needle 8) connected with the piston 2 is driven to retract. When the oil in the oil passage 15 is discharged, the oil between the compression step 14 and the moving block 21 is discharged from the oil passage 15, the spring 3 drives the moving block 21 to reset under the action of elastic recovery, so that the moving block 21 is compressed to the compression step 14 again, the piston 2 moves away from the cavity bottom wall 12, and the connecting member (for example, the valve needle 8) connected with the piston 2 is driven to extend. In this way, the present scheme can drive the piston 2 to reset and move by a single-oil-pipe, and the problem that an existing oil cylinder needs to be respectively filled with oil and discharged is solved.

[0039] Optimally, the scheme further comprises a matching block 4.

[0040] One end of the matching block 4 is limited by the spring 3, and the other end of the matching block 4 is provided with a hemispherical surface 41; the moving block 21 is provided with an arc-shaped groove 22 on the side away from the compression step 14, and the spring 3 compresses the hemispherical surface 41 to the arc-shaped groove 22.

[0041] The scheme preferably sets the hemispherical surface 41 between the spring 3 and the moving block 21; under the compression of the spring 3, the hemispherical surface 41 extends into and is limited by the arc-shaped groove 22; and the hemispherical surface 41 has a partial spherical surface structure, the spherical surface structure is a plane structure, which contacts the arc-shaped groove 22 in multiple orientation areas, and the stress of the spherical surface is towards the spherical center, so that the spherical surface cooperation between the arc-shaped groove 22 and the moving block 21 can allow the spring 3 to move freely in different directions, has the advantages of improving the flexibility of the spring 3, improving the movement degree of freedom of the spring 3, and being able to disperse and balance the stress of the piston 2 in all aspects, ensuring the stability and reliability of the piston 2.

[0042] Optimally, the matching block 4 is provided with a clamping head 42 at the end away from the hemispherical surface 41, and an annular boss 43 is further arranged between the clamping head 42 and the hemispherical surface 41.

[0043] The clamping head 42 extends into the inner ring of the spring 3; and the spring 3 abuts against the annular boss 43 at the end away from the cavity bottom wall 12.

[0044] The clamping head 42 can extend into the spring 3, thereby increasing the contact area of the matching block 4 and the spring 3 inside the spring 3, preventing the spring 3 from being separated from the matching block 4 during stretching and contraction; at the same time, the annular boss 43 is arranged between the clamping head 42 and the hemispherical surface 41, and the end of the spring 3 can fully contact the annular boss 43, thereby increasing the contact area of the matching block 4 outside the spring 3 and improving the movement stability of the spring 3.

[0045] Optimally, the outer ring of the spring 3 is close to the inner side wall of the inner cavity 11.

[0046] The spring 3 of the scheme is designed to have an outer diameter that is infinitely close to the inner diameter of the inner cavity 11, i.e., the outer ring of the spring 3 is close to the inner side wall of the inner cavity 11, so that when the spring 3 stretches and contracts in different directions, the inner side wall of the inner cavity 11 limits the stretching and contraction direction of the spring 3, thereby avoiding the end of the spring 3 from excessively deviating from the movement direction of the piston 2, and also increasing the elasticity of the spring.

[0047] Optimally, the cylinder body 1 comprises a through shell 16 and a cover plate 17.

[0048] The through shell 16 is provided with the inner cavity 11; the cover plate 17 is detachably mounted on the opening of one end of the through shell 16, and the cover plate 17 forms the cavity bottom wall 12 on one side of the through shell 16; and the other end of the through shell 16 is provided with the movable port 13.

[0049] The through shell 16 and the cover plate 17 of the scheme are preferably detachable split structures, which mainly reduce the installation difficulty and requirement of the spring 3 and still maintain sufficient stability by matching the hemispherical surface 41 of the matching block 4 and the relative position of the spring 3. Specifically, when the oil cylinder structure needs to be assembled, the piston 2 is only needed to be first installed into the inner cavity 11 of the through shell 16 and placed at the movable port 13, then the hemispherical surface 41 of the matching block 4 is clamped in the arc-shaped groove 22, then the inner ring of the spring 3 is clamped in the clamping head 42, and finally the cover plate 17 is installed on the through shell 16.

[0050] Optimally, the scheme further comprises a fixing screw 5.

[0051] The fixing screw 5 fixes the cover plate 17 on the through shell 16.

[0052] The installation of the fixing screw 5 is convenient, and only needs to be loosened or tightened to install or dismount the cover plate 17, thereby reducing the assembly difficulty.

[0053] Optimally, the scheme further comprises an oil cylinder fixing seat 7 and a fixing screw 5.

[0054] The oil cylinder fixing seat 7 is located at the movable port 13; the fixing screw 5 passes through the cover plate 17, the through shell 16 and the oil cylinder fixing seat 7 in sequence to detachably connect the cover plate 17, the through shell 16 and the oil cylinder fixing seat 7 as a whole; and one end of the piston 2 moves relative to the oil cylinder fixing seat 7.

[0055] Generally, the oil cylinder fixing seat 7 is the fixed end of the whole oil cylinder, which is used to fix the oil cylinder on a carrier, such as a splitter plate 10 or other areas of an injection molding device; and the scheme can use a single fixing screw 5 to connect the cover plate 17, the through shell 16 and the oil cylinder fixing seat 7 as a whole; only needs to provide an internal thread hole or groove at any position of the cover plate 17, the through shell 16 and the oil cylinder fixing seat 7 to complete the fixing; for example, the oil cylinder fixing seat 7 is provided with an internal thread hole matched with the fixing screw 5, the screw head of the fixing screw 5 is located at the cover plate 17, and the oil cylinder fixing seat 7 and the screw head of the fixing screw 5 jointly press the through shell 16.

[0056] Optimally, one of the ports of the oil passage 15 is located on the outer side wall of the cylinder body 1.

[0057] The scheme can directly pass or discharge oil outside the cylinder body 1, and the oil passage 15 directly penetrates the inner side and the outer side of the cylinder body 1, thereby shortening the stroke of the oil passage.

[0058] An injection nozzle, which is provided with a valve needle 8 and a single-oil-pipe oil cylinder structure of any of the above embodiments;

[0059] The valve needle 8 is installed on the piston 2.

[0060] The oil cylinder structure of the present scheme is preferably applied to the injection nozzle 9, and the reset movement of the valve needle 8 can be controlled through the single-oil-pipe structure, thereby simplifying at least two oil passage channels 15 required for the reset movement of the valve needle 8; and based on the connection relationship between the hemispherical surface 41 of the matching block 4, the piston 2 and the spring 3, the movement of the valve needle 8 can be ensured to have stability and reliability.

[0061] An injection device, which is provided with a flow distribution plate 10 and an injection nozzle 9 of the above, and the injection nozzle 9 is installed on the flow distribution plate 10.

[0062] Although the embodiments of the present application 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 present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A single-oil-tube cylinder structure characterized by comprising: The single-oil-pipe cylinder structure comprises: a cylinder, a piston and a spring; the cylinder is provided with an inner cavity, a cavity bottom wall at one end of the inner cavity and a movable port at the other end of the inner cavity; a compression step is arranged between the inner cavity and the movable port; the piston is movably installed at the movable port, one end of the piston is provided with a moving block moving in the inner cavity, and the other end of the piston extends out of the inner cavity; the spring is arranged in the inner cavity, one end of the spring is in contact with the cavity bottom wall, and the other end of the spring compresses the moving block against the compression step; the cylinder is provided with an oil passage, and one of the ports of the oil passage is located at the compression step.

2. The single-oil-hydraulic cylinder structure according to claim 1, characterized by Further comprising: a matching block; one end of the matching block is limited by the spring, and the other end of the matching block is provided with a hemispherical surface; the moving block is provided with an arc-shaped groove on the side away from the compression step, and the spring compresses the hemispherical surface against the arc-shaped groove.

3. The single-oil-hydraulic cylinder structure according to claim 2, characterized by the matching block is provided with a clamping head at the end away from the hemispherical surface, and an annular boss is further arranged between the clamping head and the hemispherical surface; the clamping head extends into the inner ring of the spring; and the other end of the spring away from the cavity bottom wall abuts against the annular boss.

4. The single-oil-hydraulic cylinder structure according to claim 3, wherein the outer ring of the spring is close to the inner side wall of the inner cavity.

5. A single-oil-hydraulic cylinder structure according to claim 3 or 4, characterized in that The cylinder comprises: a through shell and a cover plate; 6. The single-oil-hydraulic cylinder structure according to claim 5, wherein the through shell is provided with the inner cavity; the cover plate is detachably installed at the opening of one end of the through shell, and the cover plate forms the cavity bottom wall on one side of the through shell; and the other end of the through shell is provided with the movable port. Further comprising: a fixing screw; 7. The single-oil-hydraulic cylinder structure according to claim 5, wherein the fixing screw fixes the cover plate to the through shell. Further comprising:

8. The single-oil-hydraulic cylinder structure according to claim 1, wherein a cylinder fixing seat and a fixing screw; 9. An injection molding nozzle characterized by, the cylinder fixing seat is located at the movable port; and the fixing screw passes through the cover plate, the through shell and the cylinder fixing seat in sequence to detachably connect the cover plate, the through shell and the cylinder fixing seat into one body; and one end of the piston moves relative to the cylinder fixing seat. One of the ports of the oil passage is located at the outer side wall of the cylinder.

10. An injection molding apparatus characterized by comprising: a valve needle and the single-oil-pipe cylinder structure according to any one of claims 1-8 are installed; the valve needle is installed at the piston. a shunt plate and the injection nozzle according to claim 9 are provided; and the injection nozzle is installed at the shunt plate.

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