Hydraulic oil automatic circulation cooling oil cylinder

Abstract

The utility model relates to the field of hydraulic oil cylinders, and discloses a hydraulic oil automatic circulation cooling oil cylinder. The device comprises a hydraulic shell, a piston rod is arranged in the hydraulic shell, a piston is fixedly connected to the lower end of the piston rod, and an anti-collision structure is arranged at the lower end of the piston; the anti-collision structure comprises a first sliding plate, the lower end of the first sliding plate is fixedly connected with a reset spring, the lower end of the reset spring is fixedly connected with a second sliding plate, a hydraulic bin is arranged on the inner side of the hydraulic shell, an upper fixing block is arranged at the upper end of the interior of the hydraulic bin, and a lower fixing block is arranged at the lower end of the hydraulic bin. When the piston rod reciprocates, initial pressure reduction is carried out through the piston and the anti-collision rubber, meanwhile, the first sliding plate is driven by the reset spring to move downwards, and the impact between the piston and the lower fixing block can be reduced when the piston runs to generate collision.

Description

Technical Field

[0001] The present application belongs to the technical field of hydraulic cylinders, and in particular relates to a hydraulic oil automatic circulation cooling cylinder. Background Art

[0002] The hydraulic system evolved slowly from fluid transmission. In 1795, Joseph Braman (1749-1814) of England used water as the working medium in London and applied it to industry in the form of a hydraulic press, which gave birth to the world's first hydraulic press. In 1905, the working medium of water was changed to oil, and it was further improved. When the die-casting mold is performing die-casting operations, most of them use hydraulic cylinders to push the core rod or slider into the inner cavity of the die-casting mold for extrusion, which makes the volume of the inner cavity of the die-casting mold relatively smaller, pressurizes the liquid metal, improves the compactness of the casting structure, and reduces casting defects;

[0003] The patent document with announcement number CN 218862980 U discloses a hydraulic oil automatic circulation cooling hydraulic cylinder, including a cylinder body, a cold water chamber and a hydraulic chamber arranged in the cylinder body, the cold water chamber is located outside the hydraulic chamber, a piston is movably connected to the inner wall of the hydraulic chamber, one end of the piston is fixedly connected to a piston rod, a spirally wrapped oil pipe is fixedly installed on the outer wall of the hydraulic chamber, and a sealing cover 1 and a sealing cover 2 are correspondingly arranged on the top and bottom of the cylinder body, which solves the problems of complicated cooling operation, poor cooling effect and inability to cool the seal, and realizes the technical characteristics of simple cooling operation, good cooling effect and ability to cool the seal.

[0004] However, the applicant discovered during the process of implementing the above application that when the piston is reciprocating, the contact end between the sealing cover 2 and the piston is prone to damage to the sealing cover 2 or the piston due to long-term impact. Utility Model Content

[0005] The purpose of the present application is to provide a hydraulic oil automatic circulation cooling cylinder in order to solve the above-mentioned problems.

[0006] The technical solution adopted in the present application is as follows: a hydraulic oil automatic circulation cooling cylinder, comprising a hydraulic shell, a piston rod is arranged inside the hydraulic shell, the lower end of the piston rod is fixedly connected to a piston, and the lower end of the piston is provided with an anti-collision structure; the anti-collision structure comprises a slide plate one, the lower end of the slide plate one is fixedly connected to a return spring, the lower end of the return spring is fixedly connected to a slide plate two, a hydraulic bin is arranged on the inner side of the hydraulic shell, an upper fixed block is arranged at the inner upper end of the hydraulic bin, and a lower fixed block is arranged at the lower end of the hydraulic bin.

[0007] By adopting the above technical solution, when the piston rod reciprocates, the initial pressure reduction is performed by the piston and the anti-collision rubber, and at the same time, the return spring drives the slide plate to move down, which can reduce the impact between the piston and the lower fixed block when the piston collides during operation.

[0008] In a preferred embodiment, an oil inlet pipe is fixedly connected to the right side of the lower end of the lower fixed block, and a circulating oil pipe 1 is fixedly connected to the left side of the lower end of the lower fixed block. The circulating oil pipe 1 is divided into two groups and is respectively fixedly connected to the upper fixed block and the lower fixed block.

[0009] By adopting the above technical solution, the oil inlet pipe can add oil to the inside of the hydraulic housing, and the upper fixing block and the lower fixing block can connect the connecting pipe.

[0010] In a preferred embodiment, one end of the circulating oil pipe 1 away from the upper fixed block and the lower fixed block is fixedly connected to a cooling bin, and one end of the cooling bin away from the circulating oil pipe 1 is fixedly connected to a circulating oil pipe 2.

[0011] By adopting the above technical solution, the cooling chambers are divided into two groups, which can disperse and transport the oil and perform double circulation to increase the cooling effect of the oil.

[0012] In a preferred embodiment, a liquid inlet pipe and a liquid outlet pipe are respectively provided at the upper and lower ends of the cooling bin, a cooling fin is fixedly connected to one end of the cooling bin away from the hydraulic housing, and the interior of the cooling bin is filled with coolant.

[0013] By adopting the above technical solution, the liquid inlet pipe is connected to the cooling pump, and after absorbing heat from the liquid infusion pipe inside the cooling chamber, the heat is discharged through the liquid discharge pipe.

[0014] In a preferred embodiment, the upper end of the skateboard one is fixedly connected with an anti-collision rubber, the lower end of the skateboard one is fixedly connected with a rubber protective ring, the lower end of the rubber protective ring is fixedly connected to the upper end of the skateboard two, and a rubber protective ring reinforcement strip is provided at the intersection of the rubber protective ring and the skateboards one and two.

[0015] By adopting the above technical solution, the rubber protective ring can protect the reset spring, and the rubber protective ring reinforcement strip can reinforce the intersection of the rubber protective ring.

[0016] In a preferred embodiment, a one-way valve is provided inside the circulating oil pipe 1 and the circulating oil pipe 2, and a sealing ring is provided at the intersection of the piston rod and the hydraulic housing.

[0017] By adopting the above technical solution, the one-way valve can prevent the oil in the cylinder from flowing back, and at the same time discharge the hot oil through the circulating oil pipe 1 at the upper right end, and transport it to the inside of the hydraulic housing and the piston rod through the circulating oil pipe 2 on the left side of the hydraulic housing.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are:

[0019] In the present application, when the piston rod performs reciprocating motion, initial decompression is performed by the piston and the anti-collision rubber, and at the same time, the return spring drives the slide plate to move downward, which can reduce the impact between the piston and the lower fixed block when the piston collides during operation; through the cooperation of the above structures, damage to the cover 2 after long-term contact with the piston can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of this application;

[0021] Figure 2 This is a schematic diagram of the internal structure of the cooling chamber in this application;

[0022] Figure 3 For this application Figure 1 Enlarged view of point A.

[0023] Markings in the figure: 1. Hydraulic housing; 2. Piston rod; 3. Cooling chamber; 301. Circulating oil pipe 1; 302. Circulating oil pipe 2; 303. Drain pipe; 304. Inlet pipe; 305. Cooling liquid; 4. Upper fixed block; 5. Piston; 6. Anti-collision structure; 601. Slide plate 1; 602. Anti-collision rubber; 603. Reset spring; 604. Rubber protective ring; 605. Rubber protective ring reinforcement strip; 606. Slide plate 2; 7. Oil inlet pipe; 8. Cooling fins. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] Example:

[0026] Reference Figure 1-3A hydraulic oil automatic circulation cooling cylinder comprises a hydraulic shell 1, a piston rod 2 is arranged inside the hydraulic shell 1, a piston 5 is fixedly connected to the lower end of the piston rod 2, and an anti-collision structure 6 is arranged at the lower end of the piston 5; the anti-collision structure 6 comprises a slide plate 601, a return spring 603 is fixedly connected to the lower end of the return spring 603, and a slide plate 606 is fixedly connected to the lower end of the return spring 603; a hydraulic warehouse is arranged on the inner side of the hydraulic shell 1, an upper fixed 4 is arranged at the upper end of the hydraulic warehouse, and a lower fixed block is arranged at the lower end of the hydraulic warehouse; when the piston rod 2 reciprocates, the initial decompression is performed by the piston 5 and the anti-collision rubber 602, and at the same time, the return spring 603 drives the slide plate 601 to move downward, so as to reduce the impact between the piston 5 and the lower fixed block when the piston 5 collides during operation.

[0027] Reference Figure 1-3 The lower right side of the lower end of the lower fixed block is fixedly connected with an oil inlet pipe 7, and the lower left side of the lower end of the lower fixed block is fixedly connected with a circulating oil pipe 301. The circulating oil pipe 301 is divided into two groups and is respectively fixedly connected to the upper fixed block 4 and the lower fixed block. The oil inlet pipe 7 can add oil to the inside of the hydraulic housing 1, and the upper fixed block 4 and the lower fixed block can connect the connecting pipe.

[0028] Reference Figure 1-3 One end of the circulating oil pipe 301 away from the upper fixed block 4 and the lower fixed block is fixedly connected to the cooling bin 3, and one end of the cooling bin 3 away from the circulating oil pipe 301 is fixedly connected to the circulating oil pipe 2 302. The cooling bins 3 are divided into two groups, which can be used for dispersed transportation and double circulation to increase the cooling effect of the oil.

[0029] Reference Figure 1-3 The upper and lower ends of the cooling bin 3 are respectively provided with a liquid inlet pipe 304 and a liquid discharge pipe 303. The end of the cooling bin 3 away from the hydraulic housing 1 is fixedly connected with a heat dissipation fin 8. The interior of the cooling bin 3 is filled with coolant 305. The liquid inlet pipe 304 is connected to the cooling pump. After absorbing heat from the liquid infusion pipe inside the cooling bin 3, the heat is discharged through the liquid discharge pipe 303.

[0030] Reference Figure 1-3 The upper end of the skateboard 1 601 is fixedly connected with an anti-collision rubber 602, the lower end of the skateboard 1 601 is fixedly connected with a rubber protective ring 604, the lower end of the rubber protective ring 604 is fixedly connected to the upper end of the skateboard 2 606, and a rubber protective ring reinforcement strip 605 is provided at the intersection of the rubber protective ring 604, the skateboard 1 601 and the skateboard 2 606. The rubber protective ring 604 can protect the reset spring 603, and the rubber protective ring reinforcement strip 605 can reinforce the intersection of the rubber protective ring 604.

[0031] Reference Figure 1-3A one-way valve is arranged inside the circulating oil pipe 1 301 and the circulating oil pipe 2 302, and a sealing ring is arranged at the intersection of the piston rod 2 and the hydraulic housing 1. The one-way valve can prevent the oil in the cylinder from flowing back, and at the same time, the hot oil is discharged into the circulating oil pipe 1 301 at the upper end of the right side, and is transported to the inside of the hydraulic housing 1 and the piston rod 2 through the circulating oil pipe 2 302 on the left side of the hydraulic housing 1.

[0032] The implementation principle of the hydraulic oil automatic circulation cooling cylinder embodiment of the present application is:

[0033] The hydraulic oil is transported through the oil inlet pipe 7. When the piston rod 2 and the piston 5 work, the heat causes the temperature of the hydraulic oil to rise. The hot oil is then transported to the interior of the cooling bin 3 through the circulating oil pipe 1 301. The coolant 305 inside the cooling bin 3 cools down the internal transport pipe. Through the control of the one-way valve, when the right hydraulic oil enters through the circulating oil pipe 1 301, the pressure generated by the operation of the piston rod 2 drives the circulating oil pipe 2 302 of the right cooling bin 3 to open, and the hydraulic oil after cooling is transported. At the same time, the opening of the circulating oil pipe 1 301 is controlled to disperse and absorb heat in the cooling bins 3 at the left and right ends of the hydraulic housing 1 to improve the cooling effect of the hydraulic oil. When the piston rod 2 reciprocates, the initial decompression is performed through the piston 5 and the anti-collision rubber 602. At the same time, the return spring 603 drives the slide plate 1 601 to move downward, which can reduce the impact of the piston 5 and the lower fixed block when the piston 5 collides during operation. Through the cooperation of the above structure, the damage of the cover 2 after long-term contact with the piston is reduced.

[0034] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A hydraulic oil automatic circulation cooling cylinder, comprising a hydraulic housing (1), characterized in that: A piston rod (2) is arranged inside the hydraulic housing (1), a piston (5) is fixedly connected to the lower end of the piston rod (2), and an anti-collision structure (6) is arranged at the lower end of the piston (5); The anti-collision structure (6) includes a slide plate 1 (601), the lower end of which is fixedly connected to a return spring (603), the lower end of which is fixedly connected to a slide plate 2 (606), a hydraulic compartment is arranged on the inner side of the hydraulic housing (1), an upper fixing (4) is arranged on the inner upper end of the hydraulic compartment, and a lower fixing block is arranged on the lower end of the hydraulic compartment.

2. A hydraulic oil automatic circulation cooling cylinder according to claim 1, characterized in that: The lower right side of the lower fixed block is fixedly connected to an oil inlet pipe (7), and the lower left side of the lower fixed block is fixedly connected to a circulating oil pipe 1 (301). The circulating oil pipe 1 (301) is composed of two groups, which are respectively fixedly connected to the upper fixed block (4) and the lower fixed block.

3. A hydraulic oil automatic circulation cooling cylinder as claimed in claim 2, characterized in that: One end of the circulating oil pipe 1 (301) away from the upper fixing block (4) and the lower fixing block is fixedly connected to a cooling bin (3), and one end of the cooling bin (3) away from the circulating oil pipe 1 (301) is fixedly connected to a circulating oil pipe 2 (302).

4. A hydraulic oil automatic circulation cooling cylinder as claimed in claim 3, characterized in that: The upper and lower ends of the cooling bin (3) are respectively provided with a liquid inlet pipe (304) and a liquid outlet pipe (303); one end of the cooling bin (3) away from the hydraulic housing (1) is fixedly connected with a heat dissipation fin (8); and the interior of the cooling bin (3) is filled with coolant (305).

5. The hydraulic oil automatic circulation cooling cylinder according to claim 1, characterized in that: The upper end of the slide plate 1 (601) is fixedly connected with an anti-collision rubber (602), the lower end of the slide plate 1 (601) is fixedly connected with a rubber protective ring (604), the lower end of the rubber protective ring (604) is fixedly connected with the upper end of the slide plate 2 (606), and a rubber protective ring reinforcement strip (605) is provided at the intersection of the rubber protective ring (604) and the slide plates 1 (601) and 2 (606).

6. A hydraulic oil automatic circulation cooling cylinder as claimed in claim 4, characterized in that: One-way valves are arranged inside the circulating oil pipe 1 (301) and the circulating oil pipe 2 (302), and a sealing ring is arranged at the intersection of the piston rod (2) and the hydraulic housing (1).

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