High-stability low-noise oil hydraulic cylinder

Abstract

The utility model relates to the related field of oil hydraulic cylinders, in particular to a high-stability low-noise oil hydraulic cylinder which comprises a cylinder body, a piston, a piston rod, a connecting opening, a fixing sleeve, a groove, an annular sealing plate, an arc-shaped sliding plate, a spring, a connecting plate, a cleaning piece, an inserting ring, an annular groove, a limiting bolt, a cleaning block and the like. The spring and the cleaning block are arranged, the connecting plate and the cleaning piece contract inwards under the action of the elastic force of the spring, the cleaning piece can be attached to the piston rod more stably, when the cleaning piece is abraded, the spring can extrude the cleaning piece to be attached to the piston rod, and therefore dust and impurities on the piston rod are effectively cleaned, and the service life of the piston rod is prolonged. The friction noise between the piston rod and the cylinder body during movement is reduced, blockage of the piston rod due to dust and impurities is also reduced, the stability of the piston rod during movement is improved, and stable use of the oil hydraulic cylinder is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic cylinders, in particular to a high-stability and low-noise hydraulic cylinder. Background Art

[0002] A hydraulic cylinder is a common hydraulic component, usually composed of a cylinder body, a cylinder head, a piston, an oil port, a pressure relief port and other parts. The hydraulic cylinder injects high-pressure hydraulic oil to make the piston reciprocate in the cylinder, thereby realizing mechanical transmission and performing various actions.

[0003] Existing patent: CN218000038U discloses a smooth progressive buffer cylinder, which can protect the piston rod and the cylinder body through the protection component setting, prevent the dust attached to the piston rod from entering the cylinder body, avoid the dust from causing a greater impact on the piston rod and the cylinder body, and avoid greater wear and noise during use of the piston rod and the cylinder body.

[0004] This existing patent uses a dustproof pad to clean dust and impurities on the piston rod, but the dustproof pad is prone to wear after being used for a period of time, resulting in unstable contact between the dustproof pad and the piston rod, thereby reducing the dust cleaning effect. The cleaned dust is also prone to accumulation at the connection between the dustproof pad and the piston rod, which is also likely to reduce the dust cleaning effect. It is easy to cause the piston rod to get stuck during movement due to dust and impurities, and the dust and impurities also rub against the cylinder body to produce noise, which is not conducive to the stable use of the hydraulic cylinder. Summary of the invention

[0005] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a high-stability and low-noise hydraulic cylinder to solve the above-mentioned technical problems.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a high-stable low-noise hydraulic cylinder, comprising a cylinder body, a piston slidably mounted in the cylinder body, a piston rod fixedly mounted on one side of the piston and movably passing through the inner side of the cylinder body, a connecting port is respectively provided at both ends of the top of the cylinder body, a fixed sleeve movably mounted on the piston rod is installed on the outer side of the cylinder body, a groove is provided on the outer side of the fixed sleeve, and an annular sealing plate sealing the inner side of the groove is movably mounted on the outer side of the fixed sleeve, a plurality of arc-shaped slide plates are slidably mounted on the side surface of the annular sealing plate, and the annular sealing plate is connected to the fixed sleeve through a connecting mechanism;

[0007] The arc-shaped slide plate is movably connected to the inner side of the groove, and the inner side of the arc-shaped slide plate is connected to the connecting plate through a spring. The inner end surface of the connecting plate is fixed with a cleaning sheet that fits the piston. A cleaning block is arranged on the outer side of the cleaning sheet, and the cleaning block is connected to the bottom of the piston rod.

[0008] Preferably, the cleaning pieces in the groove are distributed in an annular shape with equal spacing around the piston rod as the center, and each

[0009] The cleaning sheets are surrounded to form a ring with an inner diameter corresponding to the outer diameter of the piston rod.

[0010] Preferably, the inner diameter of the annular sealing plate is larger than the outer diameter of the piston rod, and the size of the gap between the annular sealing plate and the piston rod corresponds to the cleaning block.

[0011] Preferably, the cleaning block is made of stainless steel, and when the piston rod is in a fully retracted state, the cleaning block fits against the outer end surface of the cleaning sheet.

[0012] Preferably, an annular collecting groove is provided at one end of the annular sealing plate close to the fixing sleeve, and the annular collecting groove covers the outer side of the cleaning block.

[0013] Preferably, an inclined surface is provided on one end of the outer side of the arc-shaped slide plate away from the annular sealing plate, and the middle of the inclined surface faces the inner circle of the groove when the spring is in a natural state.

[0014] Preferably, the connecting mechanism includes an insert ring arranged on the inner side of the annular sealing plate, an annular groove opened along the circumferential side surface of the insert ring, and a plurality of limit bolts movably inserted into the annular groove; the insert ring is movably inserted into an annular slot pre-opened on the side surface of the fixing sleeve, and the limit bolts and the fixing sleeve movably pass through the outer end surface of the fixing sleeve.

[0015] Preferably, a plurality of screw holes are provided on the outer end surface of the fixing sleeve, and the screw holes are matched with the limiting bolts one by one.

[0016] Beneficial effects of the utility model:

[0017] The utility model provides a spring and a cleaning block, and the connecting plate and the cleaning sheet are retracted inwardly under the action of the spring elastic force, so that the cleaning sheet can be more stably fitted on the piston rod. When the cleaning sheet is worn, the spring can also squeeze the cleaning sheet to fit on the piston rod, thereby effectively cleaning dust and impurities on the piston rod, reducing the friction noise between the piston rod and the cylinder body when the piston rod moves, and reducing the jamming of the piston rod due to dust and impurities, thereby improving the stability of the piston rod when moving, and being more conducive to the stable use of the oil hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 The utility model Figure 1 A schematic diagram of the structure enlargement in the middle;

[0020] Figure 3 It is a schematic diagram of the connection of the fixed sleeve of the utility model;

[0021] Figure 4 This is a schematic diagram of the right side connection structure of the fixed sleeve of the utility model;

[0022] Figure 5 It is a schematic diagram of the structure of the arc-shaped slider of the utility model.

[0023] Among them: cylinder body-1, piston-2, piston rod-3, connecting port-4, fixing sleeve-5, groove-6, annular sealing plate-7, arc-shaped slide plate-8, spring-9, connecting plate-10, cleaning sheet-11, insert ring-12, annular groove-13, limit bolt-14, cleaning block-15. DETAILED DESCRIPTION

[0024] In order to further explain the technical solution of the present utility model, it is described in detail through specific embodiments below.

[0025] like Figure 1 As shown, the utility model provides a high-stability low-noise hydraulic cylinder, comprising a cylinder body 1, a piston 2 slidably mounted in the cylinder body 1, a piston rod 3 fixed to one side of the piston 2 and movable through the inner side of the cylinder body 1, and a connection port 4 for introducing oil is respectively provided at both ends of the top of the cylinder body 1;

[0026] When in use, the end of the piston rod 3 is connected to the external component to be connected, and the two connecting ports 4 are connected to the external hydraulic equipment through oil pipes. The external hydraulic equipment introduces oil into different connecting ports 4 through oil pipes to realize the movement of the piston 2 along the inner wall of the cylinder body 1, and the piston 2 drives the piston rod 3 to move synchronously, and the piston rod 3 drives the external connecting components to move synchronously.

[0027] like Figures 1 to 5 As shown, in this embodiment, a fixed sleeve 5 movably mounted on the piston rod 3 is locked and fixed on the outer side of the cylinder body 1, a groove 6 is vertically opened on the outer side of the fixed sleeve 5, and an annular sealing plate 7 for sealing the inner side of the groove 6 is movably installed on the outer side of the fixed sleeve 5, and the annular sealing plate 7 can be vertically rotated along the outer side of the fixed sleeve 5, so that the annular sealing plate 7 drives the parts connected to it on the inner side to rotate to clean dust;

[0028] A plurality of arc-shaped slide plates 8 are slidably mounted on the side surface of the annular sealing plate 7, and the annular sealing plate 7 is movably connected to the fixed sleeve 5 through a connecting mechanism;

[0029] The arc-shaped slide plate 8 is movably connected to the inner side of the groove 6, and the arc-shaped slide plate 8 can move along the inner side of the groove 6 to realize that the arc-shaped slide plate 8 drives the spring 9, the connecting plate 10 and the cleaning sheet 11 to shrink inward, so that the cleaning sheet 11 shrinks inward and fits on the outer surface of the piston rod 3, and the inner side of the arc-shaped slide plate 8 is connected to the connecting plate 10 through the spring 9, and the inner end surface of the connecting plate 10 is fixed with a cleaning sheet 11 that fits with the piston 2. The cleaning sheet 11 is used to scrape off dust and impurities on the outer surface of the piston rod 3. A cleaning block 15 is arranged on the outer side of the cleaning sheet 11, and the cleaning block 15 is connected to the bottom of the piston rod 3;

[0030] The cleaning pieces 11 in the groove 6 are distributed in a ring shape with equal intervals around the piston rod 3 as the center, and the cleaning pieces 11 enclose a ring with an inner diameter corresponding to the outer diameter of the piston rod 3, so that the ring formed by the cleaning surfaces 11 can more comprehensively clean the dust and impurities on the piston rod 3;

[0031] In this embodiment, the inner diameter of the annular sealing plate 7 is larger than the outer diameter of the piston rod 3, and the gap between the annular sealing plate 7 and the piston rod 3 corresponds to the cleaning block 15, so that the cleaning block 15 can stably pass through the annular sealing plate 7 to clean the dust and impurities collected by the cleaning sheet 11;

[0032] The cleaning block 15 is made of stainless steel, and when the piston rod 3 is in a fully retracted state, the cleaning block 15 is attached to the outer end surface of the cleaning sheet 11, so that the cleaning block 15 can clean the dust and impurities accumulated on the outer side of the cleaning sheet 11;

[0033] In this embodiment, an inclined surface is provided at one end of the outer side of the arc-shaped slide plate 8 away from the annular sealing plate 7. When the spring 9 is in a natural state, the middle of the inclined surface faces the inner circle of the groove 6, so that the arc-shaped slide plate 8 can be inserted into the inner side of the groove 6 and contract inwardly through the provided inclined surface. The arc-shaped slide plate 8 contracts inwardly to squeeze the spring 9, the connecting plate 10 and the cleaning sheet 11, so that the cleaning sheet 11 can be stably attached to the outer surface of the piston rod 3.

[0034] In this embodiment, the cleaning sheet 11 is made of sponge material, which is relatively soft and can better clean the dust and impurities on the piston rod 3;

[0035] When in use, the piston rod 3 rubs against the cleaning sheet 11 during movement, and the cleaning sheet 11 scrapes off the dust and impurities remaining on the piston rod 3, reducing the friction between the piston rod 3 and the cylinder body 1 caused by the dust and impurities. While reducing the jamming and friction of the piston rod 3 caused by the dust and impurities during movement, it also improves the stability of the piston rod 3 during movement, and reduces the noise generated by the friction between the piston rod 3 and the cylinder body 1. The connecting plate 10 and the cleaning sheet 11 are retracted inwardly by the elastic force of the spring 9, so that the cleaning sheet 11 fits more stably on the piston rod 3 after retracting inwardly. When the cleaning sheet 11 is worn, the spring 9 can also squeeze the cleaning sheet 11 to fit on the piston rod 3, so that the cleaning sheet 11 can clean the dust and impurities on the piston rod 3 stably for a long time.

[0036] like Figure 2 As shown, the connection mechanism in this embodiment includes an insert ring 12 arranged on the inner side of the annular sealing plate 7, an annular groove 13 opened along the circumferential side surface of the insert ring 12, and a plurality of limit bolts 14 movably inserted into the annular groove 13. The limit bolts 14 can cooperate with the annular groove 13 to limit the horizontal position of the insert ring 12 to prevent the insert ring 12 from falling off the fixing sleeve 5. The insert ring 12 is movably inserted into the annular slot pre-opened on the side surface of the fixing sleeve 5. The insert ring 12 can rotate vertically along the annular slot on the fixing sleeve 5, and the limit bolts 14 and the fixing sleeve 5 can movably pass through the outer end surface of the fixing sleeve 5.

[0037] In this embodiment, an annular sealing plate 7 is provided with an annular collecting groove at one end close to the fixing sleeve 5, and the annular collecting groove covers the outer side of the cleaning block 15, so that the dust scraped by the cleaning block 15 can be collected through the annular collecting groove;

[0038] In this embodiment, a plurality of screw holes are provided on the outer end surface of the fixing sleeve 5, and the screw holes are matched with the limiting bolts 14 one by one, so that the limiting bolts 14 can be installed in the screw holes, and the limiting bolts 14 can match the annular groove 13 to limit the insert ring 12;

[0039] During use, when it is necessary to clean the dust and impurities accumulated outside the cleaning sheet 11, the annular sealing plate 7 can be rotated, and the annular sealing plate 7 drives the arc-shaped slide plate 8, the spring 9, the connecting plate 10 and the cleaning sheet 11 to rotate synchronously. When the cleaning sheet 11 rotates, it rubs against the cleaning block 15, and the cleaning block 15 scrapes off the dust and impurities accumulated outside the cleaning sheet 11. The scraped dust and impurities fall into the collecting groove on the annular sealing plate 7 for collection, so that the cleaning sheet 11 can continuously clean the dust and impurities on the piston rod 3.

[0040] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-stability, low-noise hydraulic cylinder, comprising a cylinder body, a piston slidably mounted in the cylinder body, a piston rod fixed to one side of the piston and movable through the inner side of the cylinder body, and a connection port is respectively provided at both ends of the top of the cylinder body; It is characterized in that The outer side of the cylinder body is provided with a fixed sleeve movably mounted on the piston rod, the outer side of the fixed sleeve is provided with a groove, and the outer side of the fixed sleeve is movably provided with an annular sealing plate for sealing the inner side of the groove, a plurality of arc-shaped slide plates are slidably mounted on the side surface of the annular sealing plate, and the annular sealing plate is connected to the fixed sleeve through a connecting mechanism; The arc-shaped slide plate is movably connected to the inner side of the groove, and the inner side of the arc-shaped slide plate is connected to the connecting plate through a spring. The inner end surface of the connecting plate is fixed with a cleaning sheet that fits the piston. A cleaning block is arranged on the outer side of the cleaning sheet, and the cleaning block is connected to the bottom of the piston rod.

2. According to claim 1, a high stability and low noise hydraulic cylinder is characterized in that: The cleaning pieces in the groove are distributed in a ring shape with equal intervals around the piston rod as the center, and the cleaning pieces are surrounded to form a ring with an inner diameter corresponding to the outer diameter of the piston rod.

3. According to claim 1, a high stability and low noise hydraulic cylinder is characterized in that: The inner diameter of the annular sealing plate is larger than the outer diameter of the piston rod, and the size of the gap between the annular sealing plate and the piston rod corresponds to the cleaning block.

4. According to claim 1, a high stability and low noise hydraulic cylinder is characterized in that: The cleaning block is made of stainless steel, and when the piston rod is in a fully retracted state, the cleaning block is attached to the outer end surface of the cleaning sheet.

5. According to claim 1, a high stability and low noise hydraulic cylinder is characterized in that: An annular collecting groove is provided at one end of the annular sealing plate close to the fixing sleeve, and the annular collecting groove covers the outer side of the cleaning block.

6. According to claim 1, a high stability and low noise hydraulic cylinder is characterized in that: An inclined surface is arranged on one end of the outer side of the arc-shaped slide plate away from the annular sealing plate, and the middle of the inclined surface faces the inner circle of the groove when the spring is in the natural state.

7. According to claim 1, a high stability and low noise hydraulic cylinder is characterized by: The connecting mechanism includes an insert ring arranged on the inner side of the annular sealing plate, an annular groove opened along the circumferential side surface of the insert ring, and a plurality of limit bolts movably inserted into the annular groove; the insert ring is movably inserted into an annular slot pre-opened on the side surface of the fixing sleeve; the limit bolts and the fixing sleeve movably pass through the outer end surface of the fixing sleeve.

8. According to claim 7, a high stability and low noise hydraulic cylinder is characterized in that: The outer end surface of the fixing sleeve is provided with a plurality of screw holes, and the screw holes are matched with the limiting bolts one by one.

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