Injection molding machine integrated quick oil cylinder

Abstract

The application discloses a whole type quick oil cylinder of an injection molding machine, which is composed of an oil cylinder front cover, a cylinder body rear cover and an oil cylinder body located between the oil cylinder front cover and the cylinder body rear cover; an oil cylinder piston rod is slidably arranged in the oil cylinder body; an oil cylinder fixing flange is arranged at a middle position of the oil cylinder body; an end of the oil cylinder piston rod is sleeved with an oil cylinder piston; and a deformation preventing structure for avoiding oil cylinder deformation is arranged on the whole type quick oil cylinder of the injection molding machine. The deformation preventing structure can avoid the problem that when the piston rod runs to a position beyond the gravity center, the piston rod and the piston will droop as a whole due to the dead weight, and the oil cylinder is deformed. The whole type quick oil cylinder can achieve large ejection force, consume less oil, not increase energy consumption much, ensure the ejection speed, effectively avoid the problem that the oil cylinder body is deformed due to the droop of the piston rod caused by large stroke, and cause oil leakage.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of injection molding machine integrated quick oil cylinder. BACKGROUND

[0002] Traditional injection molding machine quick oil cylinder structure is as shown in Figure 1 Oil cylinder body is seamless steel pipe, and threaded flange is installed after processing thread at both ends, and sealing ring is used for sealing at the contact position of oil cylinder front and rear cylinder cover flange and oil cylinder, when oil cylinder stroke is particularly long, especially on some large even super large injection molding machine, oil cylinder stroke is more than two meters even reaches four meters or more, when oil cylinder piston runs to the position exceeding gravity center during oil cylinder operation, piston rod and piston will droop as a whole due to gravity, which causes oil cylinder deformation, and flange connected to oil cylinder is deformed, which causes cylinder cover sealing ring position to leak. The longer the oil cylinder stroke is, the more likely it is to leak. Therefore, oil drain hole is processed on the front cover of traditional quick oil cylinder to assemble oil drain pipe to ensure that the leaked hydraulic oil is collected to prevent environmental pollution. SUMMARY

[0003] The present application aims to overcome the defects in the prior art, and provides an injection molding machine integrated quick oil cylinder, which is applied to large and super large injection molding machine large stroke movement station, can reduce oil cylinder deformation during machine operation, reduce machine sealing parts and oil leakage points, and prolong the service life of oil cylinder and injection molding machine.

[0004] To achieve the above-mentioned purpose, the technical scheme of the present application is to design an injection molding machine integrated quick oil cylinder, which is composed of oil cylinder front cover, cylinder body rear cover and oil cylinder body located between oil cylinder front cover and cylinder body rear cover; oil cylinder piston rod is slidably arranged in oil cylinder body, and oil cylinder fixed flange is arranged at the middle position of oil cylinder body; oil cylinder piston is arranged on the end of oil cylinder piston rod; the injection molding machine integrated quick oil cylinder is provided with a deformation prevention structure for avoiding oil cylinder deformation. The deformation prevention structure can avoid the problem that piston rod will droop as a whole due to gravity when running to the position exceeding gravity center, which causes oil cylinder deformation.

[0005] Further technical scheme is that the deformation prevention structure is the welding seam at the connection between oil cylinder front cover and oil cylinder body, and the welding seam at the connection between cylinder body rear cover and oil cylinder body. The integrated quick oil cylinder structure is applied to large and super large injection molding machine large stroke movement station, which can reduce oil cylinder deformation during machine operation, increase oil cylinder rigidity, reduce machine sealing parts and oil leakage points, reduce material cost and maintenance cost of the whole assembly, and prolong the service life of oil cylinder and injection molding machine.

[0006] Another technical solution is that the anti-deformation structure is a square plate or a round plate fixedly arranged on the oil cylinder piston rod, the lower end of the square plate or the round plate is provided with a roller, and the square plate or the round plate is fixedly connected to the inner side of the exposed end of the oil cylinder piston rod. The square plate or the round plate for supporting the piston rod is fixed to the inner side of the exposed end of the piston rod, so that no matter how long the piston rod is extended, the square plate or the round plate for supporting the piston rod is always at the end farthest from the cylinder body, which plays a good supporting and avoiding effect on preventing drooping.

[0007] Another technical solution is that the anti-deformation structure includes a sprocket and chain mechanism, a driven sprocket of the sprocket and chain mechanism is sleeved on the oil cylinder piston rod, a driving sprocket of the sprocket and chain mechanism is fixedly connected with an output shaft of a speed reducer, and the speed reducer is fixedly connected to a rack of the injection molding machine; the rotation axis of the output shaft of the speed reducer is parallel to the length direction of the oil cylinder body. After being arranged in this way, the driving sprocket rotation axis can be ensured to be parallel to the length direction of the oil cylinder body because the speed reducer is fixedly arranged on the rack of the injection molding machine, so that even if the large-stroke piston rod exceeds the center of gravity and tends to droop, the driven sprocket tends to have its wheel shaft still parallel to the length direction of the oil cylinder body under the high-speed rotation of the driven sprocket, which can correct or avoid the drooping of the piston rod, so that the oil cylinder can be prevented from deforming and leaking. The piston rod acts as the wheel shaft of the driven sprocket (because the driven sprocket is sleeved on the oil cylinder piston rod, so the driven sprocket has a relative rotation freedom with the piston rod), so that the drooping of the piston rod can be corrected by the centrifugal force of the driven sprocket through the action of the sprocket and chain mechanism; after being arranged in this way, the anti-deformation structure can be arranged in any direction, so that the installation selectivity is greatly improved, and the installation and arrangement of the anti-deformation structure are facilitated. Compared with the anti-deformation structure such as a round plate or a square plate that supports the piston rod from below, or compared with the way of preventing the piston rod from deforming by hanging a rope above the piston rod, the installation and arrangement of the anti-deformation structure can be selected according to the actual situation, and the installation position is not limited.

[0008] A further technical solution is that a tire is fixedly arranged outside the driven sprocket, and a belt transmission belt is arranged below or above the tire. The belt transmission belt has no driving mechanism such as a driving motor, and only runs by the friction between the belt and the tire; whether the belt transmission belt is arranged above or below the tire depends on the actual space condition on site; the tire is additionally arranged outside the driven sprocket, which increases the mass and radius, increases the moment of inertia, and increases the stability, so that the drooping of the piston rod can be better corrected; the structure is appropriately changed: the speed reducer of the driving sprocket and chain mechanism can also be fixedly arranged on a stand, and the stand is fixedly connected with the rack of the belt transmission belt, so that the injection molding machine has no installation space for the speed reducer, and the vibration of the speed reducer during operation is avoided from being transmitted to the belt transmission belt. A brake device is arranged on the speed reducer, so as to facilitate accurate control of the stop position.

[0009] Another technical solution is that the anti-deformation structure includes a cavity arranged in the oil cylinder piston rod, the length of the cavity is half of the length of the oil cylinder piston rod, and the cavity is located closer to the exposed end of the oil cylinder piston rod. In this way, the center of gravity of the oil cylinder piston rod is changed, which can better avoid the problem of oil cylinder deformation caused by the drooping of the piston rod during long stroke; and the technical improvement is easy and the cost is low; such structural improvement does not need to add structures outside the oil cylinder, is not affected by other structures of the injection molding machine, and does not need to consider the problem of insufficient space for setting the anti-deformation structure.

[0010] Another technical solution is that the anti-deformation structure includes a cavity arranged in the oil cylinder piston rod, the length of the cavity is half of the length of the oil cylinder piston rod, and the cavity is located closer to the exposed end of the oil cylinder piston rod. In this way, the center of gravity of the oil cylinder piston rod is changed, which can better avoid the problem of oil cylinder deformation caused by the drooping of the piston rod during long stroke; and the technical improvement is easy and the cost is low; such structural improvement does not need to add structures outside the oil cylinder, is not affected by other structures of the injection molding machine, and does not need to consider the problem of insufficient space for setting the anti-deformation structure.

[0011] The advantages and beneficial effects of the present application are that the square plate or circular plate for supporting the piston rod is fixed on the inner side of the exposed end of the piston rod, so that no matter how long the piston rod is extended, the square plate or circular plate for supporting the piston rod is always at the farthest end from the cylinder body, which has good supporting and avoiding effects for avoiding drooping.

[0012] Thus, the rotation axis of the driving sprocket is parallel to the length direction of the cylinder body, so that even if the large-stroke piston rod deviates from the center of gravity and tends to droop, the driven sprocket tends to have its wheel shaft parallel to the length direction of the cylinder body due to high-speed rotation, so that the droop of the piston rod is corrected or avoided, and the deformation of the cylinder is avoided, so that the leakage of the cylinder is avoided. The piston rod acts as the wheel shaft of the driven sprocket (since the driven sprocket is sleeved on the piston rod of the cylinder, the driven sprocket has a relative rotation freedom with the piston rod), so that the droop of the piston rod is corrected by the centrifugal force of the driven sprocket through the action of the sprocket and chain mechanism. Thus, the anti-deformation structure can be arranged in any direction, so that the installation selectivity is greatly improved, and the installation and arrangement of the anti-deformation structure are facilitated. Compared with the anti-deformation structure such as a circular plate or a square plate arranged below the piston rod, or compared with the method of preventing the deformation of the piston rod by hanging a rope above the piston rod, the installation and arrangement of the anti-deformation structure can be selected according to the actual situation, and the installation position is not limited.

[0013] The belt drive does not have a driving mechanism such as a driving motor, and only relies on the friction between the belt of the belt drive and the tire to run. Whether the belt drive is arranged above or below the tire depends on the actual space condition on site. The additional tire outside the driven sprocket increases the mass and radius, increases the moment of inertia, and increases the stability, so that the droop of the piston rod is better corrected. The structure is appropriately changed: the reduction motor of the driving sprocket and chain mechanism can be fixedly arranged on the stand, and the stand is fixedly connected with the frame of the belt drive. Thus, the injection molding machine has no installation space for the reduction motor, and the vibration of the reduction motor during operation is avoided from being transmitted to the belt drive.

[0014] The center of gravity of the piston rod of the cylinder is changed, so that the problem of the droop of the piston rod during large stroke and the deformation of the cylinder are better avoided. The technical improvement is easy, and the cost is low. The structure is improved without the need to additionally arrange a structure outside the cylinder, and is not affected by other structures of the injection molding machine, that is, the problem of insufficient space for arranging the anti-deformation structure is avoided.

[0015] After starting work, first start the upper quick oil cylinder, so that the piston rod of the quick oil cylinder extends to drive the lower injection molding machine integrated quick oil cylinder to extend as a whole, and since the structure of the upper quick oil cylinder and the lower injection molding machine integrated quick oil cylinder is completely identical, when the piston rod of the upper quick oil cylinder extends, the piston rods of the upper and lower quick oil cylinders extend outward, forming a simultaneous ejection action with greater ejection force. Moreover, even if the piston rod of the upper quick oil cylinder extends beyond its center of gravity, since it is fixed to the oil cylinder body of the lower injection molding machine integrated quick oil cylinder through the connecting rod, the lower injection molding machine integrated quick oil cylinder can effectively prevent the piston rod of the upper quick oil cylinder from extending too much and sagging. Since the piston rod of the upper quick oil cylinder extends to drive the entire lower injection molding machine integrated quick oil cylinder, when the subsequent injection molding machine integrated quick oil cylinder moves, the injection molding machine integrated quick oil cylinder has already had a certain stroke, so when the subsequent injection molding machine integrated quick oil cylinder moves, the piston rod (i.e. the oil cylinder piston rod) of the injection molding machine integrated quick oil cylinder can avoid the problem of extending beyond its center of gravity and sagging. Therefore, after such a setting, the problem of piston rod sagging, oil cylinder deformation, and hydraulic oil leakage can be avoided, and a large-diameter oil cylinder is not required. Instead, two quick oil cylinders are used to achieve a large ejection force, which consumes less oil and does not increase energy consumption much, and ensures the ejection speed. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural diagram of an existing injection molding machine quick oil cylinder;

[0017] Figure 2 is a schematic diagram of an embodiment one of an injection molding machine integrated quick oil cylinder of the present application;

[0018] Figure 3 is an effect principle diagram of Figure 2

[0019] Figure 4 is a schematic diagram of an injection molding machine quick oil cylinder in embodiment two of the present application;

[0020] Figure 5 is a front view of Figure 4

[0021] Figure 6 is a B-B sectional view of Figure 5

[0022] Figure 7 is a schematic diagram of embodiment three of the present application;

[0023] Figure 8 is a schematic diagram of embodiment four of the present application;

[0024] Figure 9 is a schematic diagram of Figure 8 ​​​Another working state schematic view of

[0025] Figure 10 Is Figure 8 Side view of the middle chain wheel chain mechanism

[0026] Figure 11 Is Figure 10 Schematic view after showing the integral quick oil cylinder, tire and belt drive belt on the basis of

[0027] Figure 12 Is Figure 11 Exploded schematic view of

[0028] Figure 13 Schematic view of the fifth embodiment of the present application

[0029] Figure 14 Is Figure 13 Another working state schematic view of

[0030] Figure 15 Schematic view of the sixth embodiment of the present application

[0031] Figure 16 Is Figure 15 Another working state schematic view of

[0032] Figure 17 Schematic view of the seventh embodiment of the present application

[0033] Figure 18 Is Figure 17 Another working state schematic view of

[0034] Figure 19 Is Figure 18 Side view of the rope between the higher position of the fixed pulley and the counterweight and

[0035] In the figure: 1, oil cylinder front cover; 2, front cover fixing screw; 3, oil cylinder piston rod; 4, oil cylinder cylinder body; 5, joint; 6, oil cylinder piston; 7, piston rod end plug; 8, guide support ring; 9, piston sealing ring; 10, end cover sealing ring; 11, buffer sealing ring; 12, piston rod sealing ring; 13, dustproof ring; 14, cylinder body front flange; 15, square plate or round plate; 16, oil cylinder fixing flange; 17, cylinder body rear cover; 18, driven sprocket; 19, driving sprocket; 20, tire; 21, belt drive belt; 22, quick oil cylinder; 23, connecting rod; 24, lever; 25, rope; 26, counterweight; 27, fixed pulley; 28, branch rope. DETAILED DESCRIPTION

[0036] The specific embodiments of the present application are further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present application, and cannot be used to limit the protection scope of the present application.

[0037] Embodiment one: as shown in the figure, the present application is a whole type fast oil cylinder of injection molding machine, which mainly consists of oil cylinder front cover 1, oil cylinder piston rod 3, oil cylinder body 4, oil cylinder piston 6, front cover fixing screw 2 and the like, plus various sealing rings, piston sealing ring 9, guide support ring 8, buffer sealing ring 11, piston rod sealing ring 12, dustproof ring 13, joint 5, piston rod end plug 7, end cover sealing ring 10, and constitutes a complete set of oil cylinder. Figure 2 The whole type fast oil cylinder can well avoid such problems, as shown in the figure, the fast oil cylinder body is composed of four single parts before processing, i.e. cylinder front flange 14, oil cylinder body 4, oil cylinder fixing flange 16 and cylinder rear cover 17, wherein the oil cylinder fixing flange 16 is processed into a semi-finished product according to the design position, and then welded with the oil cylinder body 4 into a whole, which mainly functions to fix the complete set of fast oil cylinder, after the pre-processing of each part is completed, the initial welding is performed according to the design size, after the welding is completed, each part becomes a whole part, and then the secondary processing is performed according to the actual design size, and after the processing is completed, the complete set of oil cylinder is assembled.

[0038] Figure 3 The whole type fast oil cylinder structure applied to the large stroke movement station of large and super large injection molding machine can reduce the deformation of the oil cylinder during the operation of the machine, reduce the sealing elements and oil leakage points of the machine, prolong the service life of the oil cylinder and the injection molding machine, reduce the material cost of the oil cylinder, and reduce the maintenance cost of the equipment parts.

[0039] Embodiment two: different from embodiment one, as shown in the figure, the whole type fast oil cylinder of injection molding machine is composed of oil cylinder front cover 1, cylinder rear cover 17 and oil cylinder body 4 which is fixedly connected with the oil cylinder front cover 1 and the cylinder rear cover 17 by welding; the oil cylinder piston rod 3 is slidably arranged in the oil cylinder body 4, and the oil cylinder fixing flange 16 is fixedly welded at the middle position of the oil cylinder body 4. The end of the oil cylinder piston rod 3 is sleeved with the oil cylinder piston 6.

[0040] Embodiment three: different from embodiment two, as shown in the figure, the anti-deformation structure is a square plate or a round plate 15 fixedly arranged on the oil cylinder piston rod 3, the lower end of the square plate or the round plate is provided with a roller, and the square plate or the round plate 15 is fixedly connected to the inner side of the exposed end of the oil cylinder piston rod 3. Figures 4 to 6 Embodiment four: different from embodiment two, as shown in the figure (for the convenience of illustration,

[0041] Figure 7 Embodiment five: different from embodiment four, as shown in the figure, the anti-deformation structure is a square plate or a round plate 15 fixedly arranged on the oil cylinder piston rod 3, the lower end of the square plate or the round plate is provided with a roller, and the square plate or the round plate 15 is fixedly connected to the inner side of the exposed end of the oil cylinder piston rod 3.

[0042] Embodiment six: different from embodiment five, as shown in the figure, the anti-deformation structure is a square plate or a round plate 15 fixedly arranged on the oil cylinder piston rod 3, the lower end of the square plate or the round plate is provided with a roller, and the square plate or the round plate 15 is fixedly connected to the inner side of the exposed end of the oil cylinder piston rod 3. Figures 8 to 12 Figure 8 ​​​The tire and the belt transmission belt are not shown; the anti-deformation structure includes a sprocket chain mechanism, a driven sprocket 18 of the sprocket chain mechanism is sleeved on the oil cylinder piston rod 3, a driving sprocket 19 of the sprocket chain mechanism is fixedly connected with the output shaft of the speed reducer motor, and the speed reducer motor is fixedly connected on the frame of the injection molding machine; the rotation axis of the output shaft of the speed reducer motor is parallel to the length direction of the oil cylinder cylinder body 4. The tire 20 is fixedly arranged outside the driven sprocket, and the belt transmission belt 21 is arranged below or above the tire.

[0043] Example five: different from example two is that, as shown in Figure 13 、 Figure 14 , the anti-deformation structure includes a cavity 22 arranged in the oil cylinder piston rod 3, the length of the cavity is half of the length of the oil cylinder piston rod, and the cavity is located closer to the exposed end of the oil cylinder piston rod.

[0044] Example six: different from example two is that, as shown in Figure 15 、 Figure 16 , the anti-deformation structure includes a quick oil cylinder 22 arranged above the overall structure composed of the oil cylinder front cover, the cylinder body rear cover and the oil cylinder cylinder body 4, the piston rod of the quick oil cylinder is fixedly connected with the oil cylinder cylinder body 4 through a connecting rod 23, a sliding block is fixedly arranged on the oil cylinder cylinder body, a sliding block adapted to the sliding block is arranged on the frame of the injection molding machine, and the sliding direction of the overall structure is parallel sliding relative to the quick oil cylinder.

[0045] The prior art patent CN202846836U: injection molding machine pressurized quick ejection mechanism discloses that: the ejection force required in the initial stage of top falling of the bottle embryo is very large, therefore, the ejection design scheme is usually to design an oil cylinder with a large enough cylinder diameter to complete the ejection action, which ensures that the bottle embryo can be effectively top fallen, but the oil cylinder is large, the stroke is long, and the oil consumption is large, that is, the energy consumption is large, at the same time, in order to ensure the ejection speed, a large enough hydraulic control valve and pipeline are required, the production cost is high, but limited by the structural factors, the pipeline is difficult to be designed to bear a large enough pressure, that is, the ejection speed cannot be fast enough. After the embodiment is adopted, a large ejection force can be achieved without using an oil cylinder with a large cylinder diameter, but two quick oil cylinders (that is, the quick oil cylinder 22 located above and the injection molding machine integrated quick oil cylinder located below) are used, so that the oil consumption is not large, the energy consumption is not increased much, and the ejection speed is ensured. Moreover, the embodiment can also effectively avoid the problem of oil leakage caused by the deformation of the oil cylinder cylinder body due to the drooping of the piston rod in a large stroke.

[0046] Example seven: different from example two is that, as shown in Figures 17 to 19As shown, the anti-deformation structure comprises a lever structure arranged outside the frame of the injection molding machine, the fulcrum of the lever 24 of the lever structure is arranged close to the cylinder body 4 of the oil cylinder, and the two ends of the lever are respectively fixedly connected with a rope 25, the ends of the two ropes away from the lever are fixedly connected with a counterweight branch rope 26, a fixed pulley 27 is arranged in the middle of the two ropes for changing the direction of the rope, and the moment of the side of the lever close to the fulcrum is smaller than that of the side of the lever away from the fulcrum; each rope is composed of two branch ropes 28, and the two branch ropes of the part of the two ropes located at the oil cylinder piston rod are respectively wound around two symmetrically arranged fixed pulleys (so as to realize that the two branch ropes located at the oil cylinder piston rod are "opened", that is, the two branch ropes are separated so as to facilitate the oil cylinder piston rod 6 to enter and exit without colliding with the rope; the fixed pulleys around which the two branch ropes are wound also play a role in positioning the counterweight 26, avoiding the transverse movement of the counterweight along with the oil cylinder piston rod, and ensuring that the counterweight always moves up and down at the initial position).

[0047] Because the moment of the lever on the side close to the fulcrum is smaller than the moment on the side far from the fulcrum, the counterweight at the tail end of the rope connected to the end point of the lever is in a state of upwardly pushing the oil cylinder piston rod, so that at the beginning, the counterweight pushes the end of the oil cylinder piston rod (i.e. the head of the oil cylinder piston rod with a larger size), and after the oil cylinder piston rod is extended, the counterweight continues to push the rod of the oil cylinder piston rod due to the smaller moment, and the moment on the other side is larger, so that the counterweight at the tail end of the rope connected to the end of the lever far from the fulcrum is in a state of downwardly moving, i.e. moving away from the rod of the oil cylinder piston rod, and when the oil cylinder piston rod is extended too long to exceed its center of gravity, the oil cylinder piston rod is lowered, so that the counterweight originally pushing the oil cylinder piston rod is pressed downward, so that the rope close to the fulcrum is lifted upward, and due to the structure of the lever, the rope far from the fulcrum is pulled, so that the counterweight originally far from the oil cylinder piston rod pushes the oil cylinder piston rod upward, although the lowered oil cylinder piston rod can press the counterweight originally far from the piston rod, but because the counterweight originally far from the piston rod is farther from the exposed end of the piston rod than the counterweight originally close to the piston rod, the distance of the lowered oil cylinder piston rod at the counterweight originally far from the piston rod is smaller, and the distance of the lowered oil cylinder piston rod at the counterweight originally pushing the piston rod is larger, so that the counterweight originally far from the piston rod can not be pressed, even if it is pressed, the tension of the rope is smaller than that of the other rope, so that the lowered oil cylinder piston rod can be used to lift the other rope to support the piston rod to avoid its lowering; for the cylinder structure with flanges on both sides in the prior art, the flange connection cannot withstand small deformation or lowering of the piston rod, but cannot withstand large distance lowering, so that the small distance lowering is corrected in time to avoid further lowering caused by deformation of the cylinder to cause leakage; in addition, the present embodiment is not affected by the movement of the fast oil cylinder of the injection molding machine, because the two branch ropes are arranged to facilitate the extension and reset of the oil cylinder piston rod, because the moment on the side close to the fulcrum of the lever is smaller than the moment on the side far from the fulcrum, so that the counterweight at the tail end of the rope connected to the end point on the side close to the fulcrum is always upwardly pushing, so that the problem of the larger size of the head of the oil cylinder piston rod is also solved, without manual intervention, the counterweight is always upwardly pushing during the whole process of the extension of the piston rod, and is always in a balanced state when the piston rod is not lowered; the weight of the counterweight and the position of the fulcrum can be designed in advance to avoid the problem of too large moment and too large force on the piston rod (the oil cylinder is deformed due to the counterweight pushing the piston rod).

[0048] The above only describes the preferred embodiments of the present application, and it should be noted that those skilled in the art can make some improvements and refinements without departing from the technical principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. An all-in-one quick oil cylinder for an injection molding machine, characterized by, The oil cylinder is composed of a front cover, a rear cover and a cylinder body located between the front cover and the rear cover; an oil cylinder piston rod is slidably arranged in the cylinder body; an oil cylinder fixing flange is arranged at a middle position of the cylinder body; an oil cylinder piston is arranged on an end of the oil cylinder piston rod; and an anti-deformation structure is arranged on the integrated quick oil cylinder of the injection molding machine to prevent deformation of the oil cylinder. The anti-deformation structure comprises a chain wheel and chain mechanism, a driven chain wheel of the chain wheel and chain mechanism is sleeved on the oil cylinder piston rod, a driving chain wheel of the chain wheel and chain mechanism is fixedly connected with an output shaft of a speed reducer motor, the speed reducer motor is fixedly arranged on a stand, the stand is fixedly connected with a rack of a belt transmission belt, a rotation axis of the output shaft of the speed reducer motor is parallel to a length direction of the cylinder body, and a tire is fixedly arranged outside the driven chain wheel, and the belt transmission belt is arranged below the tire.

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