CN219262838U - Novel valve needle driving cylinder with adjustable linear travel - Google Patents

Abstract

The utility model relates to a novel linear travel adjustable valve needle driving cylinder, which comprises a cylinder body, a piston matched with the inner cavity of the cylinder body, and a piston base for sealing the piston in the cylinder body; the piston is provided with an extension boss downwards, the piston base is provided with a movable through hole matched with the extension boss, the piston base is arranged in the cylinder body and is in coaxial threaded connection with the cylinder body, the side wall of the piston base is provided with an adjusting groove, the cylinder body is provided with an adjusting window corresponding to the adjusting groove, and the adjusting window is arranged along the circumferential direction of the piston base; the cylinder also comprises a stop piece for preventing the piston base from rotating, and the stop piece is arranged on the cylinder body in a removable way; when the piston adjusting device is used, if the stroke of the piston needs to be adjusted, the adjusting tool stretches into the adjusting groove through the adjusting window, the piston base is screwed circumferentially to enable the piston base to move towards or away from the piston, and then the movable stroke of the piston is limited, so that the piston adjusting device is convenient and practical, and the appearance of the whole structure is neat.

Description

Novel valve needle driving cylinder with adjustable linear travel

Technical Field

The utility model relates to the technical field of injection molding, in particular to a novel linear travel adjustable valve needle driving cylinder.

Background

The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). When it is used to realize reciprocating motion, it can eliminate speed reducer, and has no transmission clearance and smooth motion, so that it can be widely used in hydraulic systems of various machines. Hydraulic cylinders are classified into piston type, plunger type, swing type and telescopic type according to the structural type, wherein the piston type hydraulic cylinder is most used. The piston type hydraulic cylinder is generally composed of an oil cylinder body, an oil cylinder piston, a piston rod, a front cylinder cover, a rear cylinder cover and the like, and the transmission distance is the movement stroke of the piston rod.

At present, the stroke of a valve needle driving cylinder of an injection molding machine is fixed, a designer generally considers limit design in structure to carry out constraint setting on the stroke of a cylinder piston when designing the driving cylinder, the stroke setting in the mode is adopted, the general stroke can be fixed and cannot be changed, once the valve needle needs to change the stroke due to special conditions, the driving cylinder can only be disassembled and the limit structure can be modified, or a new driving cylinder can be directly replaced, so that the design cost or the purchase cost of a product is increased intactly, when adopting a stroke adjustable cylinder, the stroke setting problem of the piston limit structure is not needed to be additionally considered, and the stroke setting of the valve needle can be completed only by carrying out simple operation outside the cylinder, so that a novel linear stroke adjustable valve needle driving cylinder is necessary to be provided for meeting the daily production requirement aiming at the short plate in the prior art.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide a novel linear travel adjustable valve needle driving cylinder which can well solve the problems.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the novel linear travel adjustable valve needle driving cylinder comprises a cylinder body, a piston matched with the inner cavity of the cylinder body, and a piston base for sealing the piston in the cylinder body; the piston is provided with an extension boss downwards, the piston base is provided with a movable through hole matched with the extension boss, the piston base is arranged in the cylinder body and is in coaxial threaded connection with the cylinder body, the side wall of the piston base is provided with an adjusting groove, the cylinder body is provided with an adjusting window corresponding to the adjusting groove, and the adjusting window is arranged along the circumferential direction of the piston base; the cylinder also comprises a stop piece for preventing the piston base from rotating, and the stop piece is arranged on the cylinder body in a removable way.

The novel linear travel adjustable valve needle driving cylinder comprises a cylinder body, wherein a groove is formed in the inner wall of the cylinder body, corresponding to a piston base, a tightening plate is arranged in the groove, a stop screw hole is formed in the inner wall of the groove, the inner wall of the piston base is provided with a tightening screw matched with the stop screw hole, and when the novel linear travel adjustable valve needle driving cylinder is assembled in place, the tightening screw tightly abuts against the tightening plate on the piston base.

The utility model discloses a novel linear travel adjustable valve needle driving cylinder, wherein a first annular table is convexly arranged at the lower end of a piston base, a second annular table is convexly arranged at the lower end of the first annular table, a first annular groove and a second annular groove which are matched with the first annular table and the second annular table are respectively arranged on the inner wall of an inner cavity, a sealing ring is arranged on the first annular table, and the second annular table is in threaded connection with the second annular groove.

The novel linear travel adjustable valve needle driving cylinder comprises a piston base, wherein a cavity is arranged between the outer side wall of the upper end of the piston base and the inner wall of a first annular groove when the novel linear travel adjustable valve needle driving cylinder is assembled in place, a first channel for fluid to pass through is arranged on the inner wall of the first annular groove, and a second channel for fluid to pass through is arranged on the top surface of the cavity.

The novel linear travel adjustable valve needle driving cylinder disclosed by the utility model has the advantages that when the piston is in a maximum travel state, the upper end of the piston base is flush with the upper end of the first annular groove.

The novel linear travel adjustable valve needle driving cylinder comprises a first annular table, a second annular table, a groove, a supporting plate, a locking plate and a locking mechanism.

The novel linear travel adjustable valve needle driving cylinder disclosed by the utility model is characterized in that the edge part of the abutting plate is connected with the cylinder body, and the stop screw hole is opposite to the right center of the abutting plate.

The novel linear travel adjustable valve needle driving cylinder is characterized in that a sealing ring group is arranged on the inner wall of the movable through hole.

The novel linear travel adjustable valve needle driving cylinder is characterized in that a plurality of adjusting grooves are formed in the piston base and are uniformly distributed on the piston base.

The novel linear travel adjustable valve needle driving cylinder comprises a valve needle detachably arranged at the lower end of an extension boss, and a cooling water plate detachably arranged at the lower end of a cylinder body, wherein a movable hole for the valve needle to pass through is formed in the cooling water plate, and a circulating cooling channel is further formed in the cooling water plate.

The utility model has the beneficial effects that: when the piston adjusting device is used, if the stroke of the piston needs to be adjusted, the adjusting tool stretches into the adjusting groove through the adjusting window, the piston base is screwed circumferentially to enable the piston base to move towards or away from the piston, the movable stroke of the piston is limited, the piston adjusting device is convenient and fast, the structure of the cylinder does not need to be modified in the adjusting process, and the piston base is arranged inside the cylinder body to enable the appearance of the whole structure to be neat.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the present utility model will be further described with reference to the accompanying drawings and embodiments, in which the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained by those skilled in the art without inventive effort:

fig. 1 is an overall exploded aerial view of the novel linear travel adjustable valve needle driving cylinder of the present utility model.

Fig. 2 is an exploded bottom view of the novel linear travel adjustable valve needle actuation cylinder of the present utility model.

Fig. 3 is a top view of the novel linear travel adjustable valve needle driving cylinder of the present utility model.

Fig. 4 is a cross-sectional view A-A of fig. 3.

Fig. 5 is a B-B cross-sectional view of fig. 3.

Detailed Description

The terms "first," "second," "third," and "fourth" and the like in the description and in the claims and drawings are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

"plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

Moreover, the terms "upper, lower, left, right, upper end, lower end, longitudinal" and the like that represent the orientation are all referred to with reference to the attitude position of the apparatus or device described in this scheme when in normal use.

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the following description will be made in detail with reference to the technical solutions in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present utility model, based on the embodiments of the present utility model.

The novel linear travel adjustable valve needle driving cylinder of the preferred embodiment of the utility model comprises a cylinder body 1 which is in a cuboid shape and is vertically arranged downwards, a piston 2 which is matched with an inner cavity 1a of the cylinder body 1, and a piston base 3 which seals the piston 2 in the cylinder body 1 from the lower end of the cylinder body 1, as shown in figures 1-5; the piston 2 is provided with an extending boss 2a downwards coaxially, the extending boss 2a is of a cylinder structure in a stroke T-shaped structure, the piston base 3 is provided with a movable through hole 3a which is matched with the outer diameter of the extending boss 2a, the piston base 3 is arranged in the cylinder 1 and is connected with the piston base 3 in a coaxial threaded manner, the side wall of the piston base 3 is provided with an adjusting groove 4, the cylinder 1 is provided with an adjusting window 5 corresponding to the adjusting groove 4, and the adjusting window 5 is of a strip shape and is arranged along the circumferential direction of the piston base 3; further, this cylinder still includes prevents piston base 3 pivoted and ends position spare 6, end position spare 6 removable setting is on cylinder body 1, further, the top surface of inner chamber still eccentrically is provided with an anti-rotating pin 2b, correspond anti-rotating pin 2b eccentric on the upper surface of piston and be equipped with guiding hole 2c, when assembling in place, anti-rotating pin stretches into in the guiding hole, anti-rotating pin's upper end runs through, during the use, if need adjust the stroke of piston 2, use adjusting tool stretches into adjustment tank 4 through adjusting window 5, circumferential screwing piston base 3 makes its orientation or deviate from piston 2 and remove, and then play and carry out spacingly to piston 2's movable stroke, convenient and fast, and accessible end position spare 6 is fixed a position piston base 3 after adjusting, prevent to rotate and lead to piston 2 stroke to change, the adjusting process need not to modify the structure of cylinder, piston base 3 locates cylinder body 1 inside and makes overall structure's outward appearance clean and tidy.

Preferably, the inner wall of the cylinder body 1 is provided with a groove 7 corresponding to the piston base 3, a tightening plate 8 is arranged in the groove 7, a stop screw hole 9 is arranged on the inner wall of the piston base 3 on the inner wall of the groove 7, the stop piece 6 is a tightening screw matched with the stop screw hole 9, when the cylinder body 1 is assembled, the tightening screw is used for tightly tightening the tightening plate 8 on the piston base 3, when the cylinder body 1 is assembled, the piston base 3 is arranged in place, the tightening plate 8 is tightly tightened on the piston base 3 through the tightening screw, further, the piston base 3 is prevented from rotating easily, and in general, the piston base 3 is prevented from rotating through friction force, and of course, a plane is arranged on the side wall of the piston base 3, and the purpose of preventing the piston base 3 from rotating automatically can be achieved through the cooperation of the plane and the tightening plate 8.

Preferably, the lower end of the piston base 3 is convexly provided with a first annular table 31, the lower end of the first annular table 31 is convexly provided with a second annular table 32, the lower end of the inner wall of the inner cavity 1a is respectively provided with a first annular groove 10 and a second annular groove 11 which are matched with the first annular table 31 and the second annular table 32, the first annular table 31 is provided with a sealing ring 12 so as to ensure that the piston base 3 can move up and down and simultaneously seal the inner cavity 1a, the second annular table 32 is in threaded connection with the second annular groove 11, when the piston base is assembled in place, a cavity 21 is arranged between the outer side wall of the upper end of the piston base 3 and the inner wall of the first annular groove 10, a first channel 13 through which fluid passes is arranged on the inner wall of the first annular groove 10, a second channel 14 through which the fluid passes is arranged on the top surface of the inner cavity 1a, and the first channel 13 and the second channel 14 are communicated with an external air source or a hydraulic source so that the fluid in the inner cavity 1a and the cavity 21 is increased, and the fluid in the cavity is decreased.

In the process, when the piston 2 is in the maximum stroke state, the upper end of the piston base 3 is flush with the upper end of the first annular groove 10 to prevent the piston 2 from entering the first annular groove 10, and when the piston 2 is in the minimum stroke state, the upper end of the piston base 3 extends into the inner cavity 1a and the upper end of the first annular table 31 abuts against the upper end of the inner wall of the first annular groove 10.

Further, the adjusting groove 4 is arranged on the second annular table 32, the groove 7 is opposite to the second annular table 32, the groove 7 is directly communicated with the lower end face of the cylinder body 1, the abutting plate 8 is provided with threads matched with the second annular table 32, when the adjusting groove is assembled in place, the abutting plate 8 abuts against the second annular table 32, the edge part of the abutting plate 8 is fixedly connected with the cylinder body 1 integrally, so that complex assembly operation of excessive parts is avoided, in practice, the groove 7 is formed through CNC processing, the abutting plate 8 is formed by the part of the cylinder body 1 between the groove 7 and the piston base 3, the axial structural strength is guaranteed, the further stop screw hole 9 is opposite to the center of the abutting plate 8, and therefore the fastening screw can normally abut against the abutting plate 8 towards the piston base 3 to deform, and then the piston base 3 abuts against the inner wall of the second annular groove 11.

Preferably, the inner wall of the movable through hole 3a is provided with a sealing ring set 15 to ensure the air tightness of the inner cavity 1a when the extension boss 2a moves up and down, and generally, the sealing ring set 15 generally comprises two sealing rings arranged up and down.

Preferably, the adjustment groove 4 is provided with a plurality of evenly distributed on the piston base 3 so that the piston base 3 can be circumferentially adjusted.

Preferably, the lower extreme that extends boss 2a can be dismantled and be equipped with needle 16, and this cylinder still is equipped with the movable hole 18 that supplies needle 16 to pass including dismantling the cooling water board 17 that sets up at cylinder body 1 lower extreme on the cooling water board 17, still is equipped with circulation cooling channel 19 on the cooling water board 17, can avoid the heat transfer to the cylinder on the hot nozzle of moulding plastics at the in-process of moulding plastics through setting up the cooling water board, and then causes harmful effects to each sealing washer.

It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.

Claims (10)

1. The novel linear travel adjustable valve needle driving cylinder is characterized by comprising a cylinder body, a piston matched with the inner cavity of the cylinder body, and a piston base for sealing the piston in the cylinder body; the piston is provided with an extension boss downwards, the piston base is provided with a movable through hole matched with the extension boss, the piston base is arranged in the cylinder body and is in coaxial threaded connection with the cylinder body, the side wall of the piston base is provided with an adjusting groove, the cylinder body is provided with an adjusting window corresponding to the adjusting groove, and the adjusting window is arranged along the circumferential direction of the piston base; the cylinder also comprises a stop piece for preventing the piston base from rotating, and the stop piece is arranged on the cylinder body in a removable way.

2. The novel linear stroke adjustable valve needle driving cylinder as claimed in claim 1, wherein a groove is formed in the inner wall of the cylinder body corresponding to the piston base, a tightening plate is arranged in the groove, a stop screw hole is formed in the inner wall of the piston base on the inner wall of the groove, the stop member is a tightening screw matched with the stop screw hole, and when the novel linear stroke adjustable valve needle driving cylinder is assembled in place, the tightening screw tightly abuts the tightening plate on the piston base.

3. The novel linear stroke adjustable valve needle driving cylinder according to claim 2, wherein a first annular table is convexly arranged at the lower end of the piston base, a second annular table is convexly arranged at the lower end of the first annular table, a first annular groove and a second annular groove which are matched with the first annular table and the second annular table are respectively arranged on the inner wall of the inner cavity, a sealing ring is arranged on the first annular table, and the second annular table is in threaded connection with the second annular groove.

4. A novel linear travel adjustable valve needle driving cylinder as claimed in claim 3, wherein when assembled in place, a chamber is arranged between the outer side wall of the upper end of the piston base and the inner wall of the first annular groove, a first channel for fluid to pass through is arranged on the inner wall of the first annular groove, and a second channel for fluid to pass through is arranged on the top surface of the inner cavity.

5. A novel linear travel adjustable valve needle actuation cylinder according to claim 3, wherein the upper end of the piston base is flush with the upper end of the first annular groove when the piston is in the maximum travel condition.

6. The novel linear stroke adjustable valve needle driving cylinder as claimed in claim 3, wherein the adjusting groove is formed in the second annular table, the groove is opposite to the second annular table, threads matched with the second annular table are formed on the abutting plate, and when the novel linear stroke adjustable valve needle driving cylinder is assembled in place, the abutting plate abuts against the second annular table.

7. The novel linear-motion adjustable valve needle driving cylinder according to claim 2 or 6, wherein the edge part of the abutting plate is connected with the cylinder body, and the stop screw hole is opposite to the center of the abutting plate.

8. The novel linear travel adjustable valve needle driving cylinder as claimed in claim 1, wherein a sealing ring group is arranged on the inner wall of the movable through hole.

9. The novel linear travel adjustable valve needle driving cylinder as claimed in claim 1, wherein the adjusting groove is provided with a plurality of adjusting grooves which are uniformly distributed on the piston base.

10. The novel linear travel adjustable valve needle driving cylinder as claimed in claim 1, wherein the lower end of the extension boss is detachably provided with a valve needle, the cylinder further comprises a cooling water plate detachably arranged at the lower end of the cylinder body, the cooling water plate is provided with a movable hole for the valve needle to pass through, and the cooling water plate is further provided with a circulating cooling channel.

Images