Lifting oil cylinder structure of carrier

Abstract

The invention discloses a lifting oil cylinder structure of a carrier, and relates to the technical field of oil cylinder structures. The dust scraping device comprises an oil cylinder shell and a piston rod movably and slidably connected into the oil cylinder shell, a mounting cover is fixedly mounted at the end, close to the piston rod, of the oil cylinder shell, a dust scraping ring is fixedly connected to the top of the mounting cover, and the piston rod is sleeved with the dust scraping ring which is used for scraping dust on the piston rod. Dust, a dust-oil mixture and oil are separated in different spaces through the structure of the inner ring layer and the outer ring layer, oil is adsorbed and dust is isolated through the characteristics of the sponge block, meanwhile, the sponge block is extruded through vertical movement of the extrusion column, the extruded oil is guided back to the contact end of the piston rod and the oil cylinder shell, oil loss is avoided, and dust is isolated. The ash-oil mixture is prevented from entering the oil cylinder shell, and the problem that the service life of the oil cylinder is shortened due to the fact that the ash-oil mixture easily enters the oil cylinder when the carrier is in a high-dust environment is thoroughly solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil cylinder structure, in particular to a lifting oil cylinder structure of a trolley. BACKGROUND

[0002] The trolley usually runs in warehouses, workshops, ports and other places, and the environment is dusty and humid, and dust and sand particles are often adhered to the exposed piston rod surface and brought into the sealing ring, scratching the piston rod and the sealing element to cause leakage, and the dust and a small amount of leaked hydraulic oil can form a paste with strong abrasiveness, further damaging the internal structure of the oil cylinder.

[0003] The existing method of isolating dust through a corrugated pipe protective sleeve will cause the corrugated part to bear repeated bending and stretching under the high frequency and long stroke extension of the trolley, and the material will crack or break due to fatigue, resulting in the need to frequently replace the corrugated pipe protective sleeve on the lifting oil cylinder of the trolley.

[0004] In view of the above technical defects, the present application provides a solution. SUMMARY

[0005] The present application provides a lifting oil cylinder structure of a trolley, which solves the problem that the trolley in a high-dust environment is easy to cause a dust-oil mixture to enter the oil cylinder, thereby reducing the service life of the oil cylinder.

[0006] To achieve the purpose of avoiding the entry of the oil-dust mixture into the oil cylinder and reducing the oil loss in the oil cylinder, the present application realizes the purpose by the following technical scheme: a lifting oil cylinder structure of a trolley, comprising an oil cylinder shell and a piston rod movably and slidingly connected in the oil cylinder shell, an installation cover is fixedly installed on the oil cylinder shell near one end of the piston rod, a dust scraping ring is fixedly connected to the top of the installation cover, the dust scraping ring is sleeved on the piston rod, and the dust scraping ring is used for scraping dust on the piston rod;

[0007] A oil scraping ring is sleeved on the piston rod, the oil scraping ring is used for scraping dust and oil on the piston rod, and a movable cylinder is fixedly connected between the bottom end of the oil scraping ring and the top end of the oil cylinder shell; the movable cylinder, the oil scraping ring and the dust scraping ring are all made of polyurethane rubber;

[0008] A sponge block is arranged between the movable cylinder and the installation cover, the sponge block is used for adsorbing oil and separating dust and oil, a connecting rod is fixedly connected to the bottom of the oil scraping ring, and a pressing column is fixedly installed on the connecting rod, the pressing column is used for pressing the sponge block and extruding the oil in the sponge block.

[0009] Further, the dust scraping ring is located above the oil scraping ring.

[0010] Further, the inner wall of the mounting cover is fixedly connected with a connecting hopper, the bottom end of the connecting hopper is fixedly connected with a fixed cylinder, the fixed cylinder is movably connected with a mounting bent plate, the mounting bent plate is fixedly connected with a positioning column, the bottom of the sponge block is provided with a positioning hole, and the positioning hole is embedded with the positioning column.

[0011] Further, the fixed cylinder and the mounting cylinder are provided with a cavity, the cavity is provided with a spring, and the spring is fixed between the end of the connecting rod away from the oil scraping ring and the bottom of the inner wall of the mounting cover.

[0012] The connecting hopper is provided with a movable opening, the connecting rod is arranged in the movable opening, and the connecting rod and the connecting hopper are movably and slidably connected.

[0013] Further, the fixed cylinder and the movable cylinder are fixedly connected with a connecting channel, the bottom of the mounting bent plate is provided with an output slot, the input slot is fixedly connected with a second filter screen, and the input slot is connected with the connecting channel.

[0014] Further, the sponge block is movably connected with a first filter screen, and the top end of the first filter screen is in contact with the bottom end of the extrusion column.

[0015] Further, the mounting cover and the fixed cylinder are both provided with a material replacing opening, the inner diameter of the material replacing opening is the same as the outer diameter of the mounting bent plate, the number of the mounting bent plates is two, the two mounting bent plates are symmetrically distributed, and the two mounting bent plates are both fixedly provided with a sealing strip.

[0016] Further, the opposite sides of the two mounting bent plates are both fixedly connected with two elastic sheets which are symmetrically distributed, the side of the elastic sheet away from the mounting bent plate is fixedly connected with an abutting plate, the elastic sheet and the abutting plate are both in contact with the mounting cover, the opposite ends of the two elastic sheets on the same mounting bent plate are both fixedly connected with a pressing plate, and when the end of the elastic sheet away from the pressing plate is located between the mounting cover and the fixed cylinder, the sealing strips of the two mounting bent plates are in abutment.

[0017] The present application has the following advantages:

[0018] The lifting oil cylinder structure of the carrier realizes the relative movement of the oil scraping ring and the piston rod, the relative movement of the dust scraping ring and the piston rod and the up-down movement of the extrusion column through the power of the oil cylinder and the piston rod, realizes the oil scraping, dust scraping and oil and dust mixture scraping of the piston rod, separates the dust, oil and dust mixture and oil in different spaces through the structure of the inner and outer ring layers, sets the detachable sponge block in the space of the oil and dust mixture, adsorbs the oil through the characteristics of the sponge block, isolates the dust, extrudes the sponge block through the up-down movement of the extrusion column, realizes the guiding of the extruded oil to the contact end of the piston rod and the oil cylinder shell, avoids the oil loss and isolates the dust, and prevents the oil and dust mixture from entering the oil cylinder shell.

[0019] Of course, any product implementing the present application does not necessarily need to achieve all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the whole structure schematic diagram of the application;

[0021] Figure 2 It is the internal structure schematic diagram of the application;

[0022] Figure 3 It is the structure schematic diagram that the cavity is set between the installation cover and the fixed cylinder of the application;

[0023] Figure 4 It is the structure explosion schematic diagram between the installation cover and the movable cylinder of the application;

[0024] Figure 5 It is the structure schematic diagram that the connecting rod is fixedly connected at the bottom of the dust scraping ring of the application;

[0025] Figure 6 It is the structure schematic diagram that the output slot is set at the bottom of the installation bending plate of the application;

[0026] Figure 7 It is the structure schematic diagram that the elastic sheet is fixedly connected on the installation bending plate of the application;

[0027] Figure 8 It is the structure schematic diagram that the positioning hole is set at the bottom of the sponge block and is embedded with the positioning column of the application.

[0028] In the drawing: 1, oil cylinder shell; 2, piston rod; 3, installation cover; 4, dust scraping ring; 5, oil scraping ring; 6, movable cylinder; 7, connecting rod; 8, extrusion column; 9, spring; 10, filter screen one; 11, sponge block; 12, installation bending plate; 13, fixed cylinder; 14, connecting hopper; 15, connecting channel; 16, filter screen two; 17, elastic sheet; 18, pressing plate; 19, abutting plate; 20, positioning column. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0030] In the description of the application, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery" and the like indicate the orientation or positional relationship, which are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the indicated component or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0031] Please refer to Figures 1-8 The embodiment of the present application provides a technical scheme: a lifting oil cylinder structure of a carrier, comprising an oil cylinder shell 1 and a piston rod 2 movably and slidingly connected in the oil cylinder shell 1, the oil cylinder shell 1 is fixedly installed with a mounting cover 3 near one end of the piston rod 2, the mounting cover 3 is fixedly connected with a dust scraping ring 4 at the top, the dust scraping ring 4 is sleeved on the piston rod 2, and the dust scraping ring 4 is used for scraping dust on the piston rod 2.

[0032] The internal structure of the oil cylinder shell 1 is the same as that of the existing oil cylinder, and the specific structure and working principle of the oil cylinder shell 1 and the piston rod 2 are prior art.

[0033] The piston rod 2 is sleeved with an oil scraping ring 5, the oil scraping ring 5 is used for scraping dust and oil on the piston rod 2, a movable cylinder 6 is fixedly connected between the bottom end of the oil scraping ring 5 and the top end of the oil cylinder shell 1, the dust scraping ring 4 is located above the oil scraping ring 5, and the movable cylinder 6, the oil scraping ring 5 and the dust scraping ring 4 are all made of polyurethane rubber.

[0034] The dust scraping ring 4 and the oil scraping ring 5 are both in the shape of a cone, and the cone is arranged on the piston rod 2.

[0035] The movable cylinder 6 and the mounting cover 3 are provided with a sponge block 11, the sponge block 11 is used for adsorbing oil and separating dust and oil, the bottom of the oil scraping ring 5 is fixedly connected with a connecting rod 7, the connecting rod 7 is fixedly installed with an extrusion column 8, and the extrusion column 8 is used for extruding the sponge block 11 and extruding oil in the sponge block 11.

[0036] The connecting rod 7 and the extrusion column 8 are connected through bolts, the top end of the extrusion column 8 is a threaded rod, a nut is threadedly connected on the threaded rod, and the nut is used for mounting the extrusion column 8 on the connecting rod 7.

[0037] When the piston rod 2 is retracted into the oil cylinder shell 1, the dust scraping ring 4 contacts the piston rod 2 to scrape dust on the surface of the piston rod 2, the piston rod 2 passing through the dust scraping ring 4 continues to pass through the oil scraping ring 5, a friction force is generated between the piston rod 2 and the oil scraping ring 5, the oil scraping ring 5 moves downward with the piston rod 2 through the friction force, the movable cylinder 6 moves downward with the oil scraping ring 5 to deform, when the movable cylinder 6 deforms to the limit, the oil scraping ring 5 moves relative to the piston rod 2 to scrape off dust on the surface of the piston rod 2 which is not cleaned and oil brought out when the piston rod 2 is stretched out, the scraped oil and dust mixture moves to the surface of the filter screen I 10 along the slope on the surface of the oil scraping ring 5 along with the accumulation of the amount, along with long-term use, the oil in the mixture is absorbed by the sponge block 11, and the dust stays above the sponge block 11.

[0038] When the piston rod 2 extends out of the oil cylinder shell 1, the oil scraping ring 5 is reset by friction, the connecting rod 7 moves up with the oil scraping ring 5, and the piston rod 2 continues to extend out after the oil scraping ring 5 is reset, the sponge block 11 loses the extrusion force and gradually recovers, and the filter screen one 10 resets with the sponge block 11. At this time, the oil on the surface of the piston rod 2 is scraped to the lower side of the oil scraping ring 5, the oil and ash mixture is scraped to the lower side of the dust scraping ring 4, and the scraped oil and ash mixture also flows to the upper side of the sponge block 11, and the collection of ash and oil is repeated.

[0039] The connecting hopper 14 is fixedly connected to the inner wall of the mounting cover 3, the fixed cylinder 13 is fixedly connected to the bottom end of the connecting hopper 14, the mounting bent plate 12 is movably connected to the fixed cylinder 13, the positioning column 20 is fixedly connected to the mounting bent plate 12, and the sponge block 11 is provided with a positioning hole at the bottom.

[0040] The mounting bent plate 12 is a semicircular bent plate, the longitudinal section of the bent plate is L-shaped, and the mounting bent plate 12 can be pulled out from the refueling opening of the fixed cylinder 13.

[0041] The fixed cylinder 13 and the mounting cover 3 are provided with a cavity therebetween, the cavity is provided with a spring 9, the spring 9 is fixed between the end of the connecting rod 7 away from the oil scraping ring 5 and the bottom inner wall of the mounting cover 3, the connecting hopper 14 is provided with a movable opening, the connecting rod 7 is arranged in the movable opening, the connecting rod 7 is movably and slidably connected to the connecting hopper 14, the fixed cylinder 13 and the movable cylinder 6 are fixedly connected with a connecting channel 15, the mounting bent plate 12 is provided with an output slot at the bottom, the filter screen two 16 is fixedly connected to the input slot, and the input slot is in communication with the connecting channel 15.

[0042] The spring 9 is used to increase the path of the connecting rod 7, so that when the connecting rod 7 extrudes the spring 9 downward, the force is applied to the extrusion column 8 to directly extrude the sponge block 11, and the efficiency of extruding the sponge block 11 is improved.

[0043] When the oil scraping ring 5 moves downward again, the connecting rod 7 moves downward with the oil scraping ring 5, the end of the connecting rod 7 away from the oil scraping ring 5 extrudes the spring 9, the displacement of the connecting rod 7 extruding the spring 9 causes the extrusion column 8 to move downward with the connecting rod 7, the extrusion column 8 pushes the filter screen one 10 to move downward, the filter screen one 10 extrudes the sponge block 11 downward, and the oil in the sponge block 11 is extruded out of the sponge block 11 and flows into the connecting channel 15. In this process, the filter screen two 16 is located between the sponge block 11 and the connecting channel 15, the filter screen two 16 prevents solid from sinking into the connecting channel 15, and finally enters the joint between the piston rod 2 and the oil cylinder shell 1, so that the oil is soaked in the contact end of the piston rod 2 and the oil cylinder shell 1.

[0044] The sponge block 11 is movably connected with a filter screen 10 at the top, and the top end of the filter screen 10 is in contact with the bottom end of the extrusion column 8. The mounting cover 3 and the fixed cylinder 13 are both provided with a material replacement opening, the inner diameter of the material replacement opening is the same as the outer diameter of the mounting bent plate 12, the number of the mounting bent plate 12 is two, and the two mounting bent plates 12 are symmetrically distributed towards each other. The two mounting bent plates 12 are both fixedly connected with two elastic sheets 17 which are symmetrically distributed upwards and downwards. The elastic sheet 17 is fixedly connected with a contact plate 19 on the side away from the mounting bent plate 12. The elastic sheet 17 and the contact plate 19 are both in contact with the mounting cover 3. The two elastic sheets 17 located on the same mounting bent plate 12 are both fixedly connected with a pressing plate 18 towards the end. When the end of the elastic sheet 17 away from the pressing plate 18 is located between the mounting cover 3 and the fixed cylinder 13, the sealing strips of the two mounting bent plates 12 abut.

[0045] The shape of the elastic sheet 17 is V-shaped. When the pressing plate 18 is operated, the two parts of the elastic sheet 17 that are bent tend to be in a flat angle state.

[0046] When the sponge block 11 needs to be replaced, the pressing plates 18 are extruded towards each other. The elastic sheets 17 are deformed under stress. The elastic sheets 17 located upwards and downwards move towards each other with the pressing plate 18. The elastic sheet 17 and the contact plate 19 are separated from the mounting cover 3. The mounting bent plate 12 can be taken out from the material replacement opening on the mounting cover 3. The sponge block 11 is taken out, and the new sponge block 11 is installed by aligning the positioning hole at the bottom of the sponge block 11 with the positioning column 20. Then, the mounting bent plate 12 is slid into the fixed cylinder 13, and the pressing plates 18 are extruded towards each other so that the uppermost elastic sheet 17 can pass through the material replacement opening of the mounting cover 3. When the elastic sheet 17 is located in the mounting cover 3, the pressing plate 18 is loosened. The contact plate 19 is in contact with the material replacement opening through the restoring force of the elastic sheet 17. The installation of the mounting bent plate 12 is realized, and the replacement of the sponge block 11 is realized.

[0047] Working principle: when the piston rod 2 is retracted into the oil cylinder shell 1, the dust scraping ring 4 contacts the piston rod 2 to scrape off the dust on its surface, the piston rod 2 passing through the dust scraping ring 4 continues to pass through the oil scraping ring 5, and the friction between the piston rod 2 and the oil scraping ring 5 causes the oil scraping ring 5 to move downward with the piston rod 2, the movable cylinder 6 moves downward with the oil scraping ring 5 to deform, when the movable cylinder 6 deforms to the limit, the oil scraping ring 5 moves relative to the piston rod 2 to scrape off the dust on the surface of the piston rod 2 and the oil brought out when the piston rod 2 is extended, and the scraped oil and dust mixture moves along the slope on the surface of the oil scraping ring 5 to the surface of the filter screen one 10, with long-term use, the oil in the mixture is absorbed by the sponge block 11, and the dust stays above the sponge block 11, when the oil scraping ring 5 moves downward again, the connecting rod 7 moves downward with the oil scraping ring 5, the end of the connecting rod 7 away from the oil scraping ring 5 presses the spring 9, the displacement of the connecting rod 7 pressing the spring 9 causes the pressing column 8 to move downward with the connecting rod 7, the pressing column 8 pushes the filter screen one 10 to move downward, the filter screen one 10 presses the sponge block 11 to move downward, the oil in the sponge block 11 is pressed out of the sponge block 11 and flows into the connecting channel 15, in this process, the filter screen two 16 is located between the sponge block 11 and the connecting channel 15, and the filter screen two 16 prevents solid from sinking into the connecting channel 15, and finally enters the joint between the piston rod 2 and the oil cylinder shell 1 to make the oil wet the joint between the piston rod 2 and the oil cylinder shell 1.

[0048] When the piston rod 2 is extended out of the oil cylinder shell 1, the oil scraping ring 5 is reset by the friction, the connecting rod 7 moves upward with the oil scraping ring 5, the piston rod 2 continues to extend upward after the oil scraping ring 5 is reset, the sponge block 11 gradually recovers from the pressing force, and the filter screen one 10 recovers with the sponge block 11, at this time, the oil on the surface of the piston rod 2 is scraped to the lower side of the oil scraping ring 5, the oil and dust mixture is scraped to the lower side of the dust scraping ring 4, and the scraped oil and dust mixture also flows to the upper side of the sponge block 11 to repeat the collection of dust and oil.

[0049] When the sponge block 11 needs to be replaced, the pressing plates 18 are pressed towards each other, the elastic pieces 17 are deformed under the force, the upper and lower elastic pieces 17 move towards each other with the pressing plates 18, the elastic pieces 17 are separated from the abutting plate 19 and the installation cover 3, the installation bending plate 12 can be taken out of the replacement opening of the installation cover 3, the sponge block 11 is taken out, and a new sponge block 11 is installed by aligning the positioning holes at the bottom of the sponge block 11 with the positioning columns 20, then the installation bending plate 12 is slid into the fixed cylinder 13, the pressing plates 18 are pressed towards each other to make the uppermost elastic pieces 17 pass through the replacement opening of the installation cover 3, the pressing plates 18 are released when the elastic pieces 17 are located in the installation cover 3, the abutting plate 19 abuts against the replacement opening through the restoring force of the elastic pieces 17, the installation of the installation bending plate 12 is realized, and the replacement of the sponge block 11 is realized.

[0050] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other presenters can develop. It is also possible, however, that only a single element can be present. It is further noted that such a term as "comprising" is intended to mean that the embodiments include the recited elements, but not excluding other elements. "Consisting essentially of when used herein in relation to a composition, means that the composition includes the recited elements, and can include additional elements, so long as the additional elements do not materially alter the basic and novel properties of the claimed composition. "Consisting of" means the composition includes the recited elements and nothing more.

[0051] The preferred embodiments of the application disclosed above are only used to help explain the present application. The preferred embodiments do not describe all the details of the present application, nor limit the present application to only the specific embodiments. It is apparent that many modifications and variations of the present application are possible in light of this teaching. The embodiments are chosen and described in order to best explain the principles of the present application and its practical application and to thereby enable others skilled in the art to best utilize the present application. The present application is limited only by the following claims and their equivalents.

Claims

1. A lifting cylinder structure for a transport vehicle, comprising a cylinder housing (1) and a piston rod (2) movably and slidably connected within the cylinder housing (1), characterized in that, The cylinder housing (1) is fixedly installed with a mounting cover (3) at one end near the piston rod (2). A dust scraper ring (4) is fixedly connected to the top of the mounting cover (3). The dust scraper ring (4) is sleeved on the piston rod (2) and is used to scrape off the dust on the piston rod (2). The piston rod (2) is fitted with an oil scraper ring (5), which is used to scrape off the dust and oil on the piston rod (2). A movable cylinder (6) is fixedly connected between the bottom end of the oil scraper ring (5) and the top end of the cylinder housing (1). The movable cylinder (6), the oil scraper ring (5) and the dust scraper ring (4) are all made of polyurethane rubber. A sponge block (11) is provided between the movable cylinder (6) and the mounting cover (3). The sponge block (11) is used to absorb oil and separate dust from oil. A connecting rod (7) is fixedly connected to the bottom of the oil scraper ring (5). An extrusion column (8) is fixedly installed on the connecting rod (7). The extrusion column (8) is used to extrude the sponge block (11) and squeeze out the oil inside the sponge block (11).

2. The lifting cylinder structure for a transport vehicle according to claim 1, characterized in that: The dust scraper ring (4) is located above the oil scraper ring (5).

3. The lifting cylinder structure for a transport vehicle according to claim 1, characterized in that: The inner wall of the mounting cover (3) is fixedly connected to a connecting bucket (14), the bottom end of the connecting bucket (14) is fixedly connected to a fixing cylinder (13), the fixing cylinder (13) is movably connected to a mounting bend plate (12), the mounting bend plate (12) is fixedly connected to a positioning post (20), the bottom of the sponge block (11) is provided with a positioning hole, and the positioning hole is fitted with the positioning post (20).

4. The lifting cylinder structure for a transport vehicle according to claim 3, characterized in that: A cavity is provided between the fixed cylinder (13) and the mounting cylinder (3), and a spring (9) is provided in the cavity. The spring (9) is fixed between the end of the connecting rod (7) away from the oil scraper ring (5) and the bottom of the inner wall of the mounting cover (3). The connecting bucket (14) has an opening for movement, and the connecting rod (7) passes through the opening for movement. The connecting rod (7) is movably and slidably connected to the connecting bucket (14).

5. The lifting cylinder structure for a transport vehicle according to claim 3, characterized in that: A connecting channel (15) is fixedly connected between the fixed cylinder (13) and the movable cylinder (6). An output slot is provided at the bottom of the mounting plate (12), and a filter screen (16) is fixedly connected in the input slot. The input slot is connected to the connecting channel (15).

6. The lifting cylinder structure for a transport vehicle according to claim 1, characterized in that: The top of the sponge block (11) is movably connected to a filter screen (10), and the top of the filter screen (10) is in contact with the bottom of the extrusion column (8).

7. The lifting cylinder structure for a transport vehicle according to claim 3, characterized in that: Both the mounting cover (3) and the fixing cylinder (13) are provided with material exchange ports. The inner diameter of the material exchange port is the same as the outer diameter of the mounting bend plate (12). There are two mounting bend plates (12), and the two mounting bend plates (12) are symmetrically distributed facing each other. A sealing strip is fixed between the two mounting bend plates (12).

8. The lifting cylinder structure for a transport vehicle according to claim 7, characterized in that: Two spring pieces (17) are fixedly connected to opposite sides of the two mounting bends (12), and two spring pieces (17) are symmetrically distributed. A contact plate (19) is fixedly connected to the side of the spring piece (17) away from the mounting bend (12). Both the spring piece (17) and the contact plate (19) are in contact with the mounting cover (3). A pressing plate (18) is fixedly connected to the opposite ends of the two spring pieces (17) on the same mounting bend (12). When the end of the spring piece (17) away from the pressing plate (18) is located between the mounting cover (3) and the fixed cylinder (13), the sealing strips of the two mounting bends (12) abut against each other.

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