Oil cylinder piston rod extension protection device

Abstract

The utility model relates to an oil cylinder piston rod extension protection device which comprises a fastening mechanism arranged on a cylinder body of an oil cylinder, a sliding rail extending in the axial direction of the oil cylinder is arranged on the fastening mechanism, and a protection mechanism is arranged on the sliding rail in a sliding mode. A piston rod of the oil cylinder is located in the protection mechanism, and the protection mechanism is connected with the piston rod. The sliding rail and the protection mechanism are arranged on the cylinder body of the oil cylinder through the fastening mechanism, the piston rod is protected through the protection mechanism synchronously moving along with the piston rod, and the oil cylinder is simple, efficient, safe and reliable.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to a piston rod extension protection device for hydraulic cylinders. Background Technology

[0002] After nearly 50 years of development, my country's hydraulic industry has achieved considerable production strength and technological level, which can basically meet the general needs of economic development. The matching rate of major complete sets of equipment has reached more than 60%. In particular, the rapid growth of downstream industries in the past 10 years has actively promoted the growth of the hydraulic industry. Hydraulic cylinders are one of the most mature hydraulic products in my country. The industry has maintained rapid growth for many years and has formed a relatively mature supply and demand chain with a large market scale.

[0003] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy, performing linear reciprocating motion (or oscillating motion). It has a simple structure and reliable operation. When used to achieve reciprocating motion, it eliminates the need for a speed reduction device, has no transmission backlash, and provides smooth movement. Therefore, it is widely used in the hydraulic systems of various machines. Hydraulic cylinders can be mainly classified into four types according to their structure: piston type, plunger type, telescopic type, and oscillating type. Their working principle is to use the pressure of a liquid to generate mechanical motion. Different levels of force and speed are achieved by adjusting the pressure of the hydraulic fluid. Hydraulic cylinders have a very wide range of applications, mainly including engineering machinery, metallurgy, mining, and construction industries.

[0004] Hydraulic cylinders are widely used as important actuators in various equipment in industries such as engineering machinery, metallurgy, mining, and construction. However, during the extension of the cylinder piston rod, the piston rod is easily damaged by external environmental factors due to the lack of effective protective devices, thus affecting the normal operation and service life of the cylinder. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing a hydraulic cylinder piston rod extension protection device. This device uses a fastening mechanism to mount a slide rail and a protective mechanism on the cylinder body of the hydraulic cylinder, and the protective mechanism, which moves synchronously with the piston rod, protects the piston rod. This device is simple, efficient, safe, reliable, and easy to operate.

[0006] This utility model is achieved through the following technical solution: a piston rod extension protection device for a hydraulic cylinder is provided, including a fastening mechanism installed on the cylinder body of the hydraulic cylinder, a slide rail extending axially along the hydraulic cylinder on the fastening mechanism, and a protection mechanism sliding on the slide rail; the piston rod of the hydraulic cylinder is located inside the protection mechanism, and the protection mechanism and the piston rod are connected; the slide rail and the protection mechanism are installed on the cylinder body of the hydraulic cylinder by the fastening mechanism, and the piston rod is protected by the protection mechanism that moves synchronously with the piston rod.

[0007] As an optimization, the protective mechanism includes several sleeves extending along the cylinder axis and sliding on the slide rail; the sleeves are provided with connecting parts that slide in a direction perpendicular to the sleeve axis, and adjacent sleeves are connected by connecting parts; the size of the protective mechanism is adjusted by the connecting parts that slide on the sleeves, so that the protective mechanism can be adapted to cylinders of different diameters.

[0008] As an optimization, the fastening mechanism includes fastening plates arranged opposite each other, with the cylinder body located between the two fastening plates, and the two fastening plates are fixedly connected by fastener A; by adjusting the size of the clamping space according to the diameter of the cylinder body through the fastening plates arranged opposite each other, the protective device can be applied to hydraulic cylinders of different sizes.

[0009] As an optimization, the fastening plate includes several fastening strips that are hinged in sequence, and fastening blocks that are compatible with fastener A are respectively hinged at both ends of the fastening plate; by adapting the fastening strips that are hinged in sequence to the outer wall of the cylinder with different diameters, the stability of the fastening mechanism is improved.

[0010] As an optimization, a sliding block is hinged to the fastening bar, and a flexible anti-slip pad is provided on the sliding block; by adapting the sliding block and the flexible anti-slip pad to the outer wall of the cylinder, the stability of the fastening mechanism is improved.

[0011] As an optimization, the slide rail is provided with limit block A and limit block B, which are located at both ends of the cylinder body respectively; the limit blocks A and limit block B prevent the protective device from sliding on the cylinder body.

[0012] As an optimization, the limiting block B is slidably mounted on the slide rail along the cylinder axis, and the limiting block B is connected to the slide rail by fastener B; by using the limiting block B slidably mounted on the slide rail, the slide rail is fixed on cylinder bodies of different lengths, so that the protective device can be applied to cylinders of different sizes.

[0013] As an optimization, an elongated hole extending perpendicular to the axis of the sleeve is provided on the sleeve plate, and the connector is connected to the sleeve plate by a fastener C passing through the elongated hole; the sleeve plate and the connector are fastened by the fastener C to prevent the protective mechanism from loosening.

[0014] The beneficial effects of this utility model are as follows: the slide rail and protective mechanism are set on the cylinder body of the hydraulic cylinder by the fastening mechanism, and the piston rod is protected by the protective mechanism that moves synchronously with the piston rod; the size of the protective mechanism is adjusted by the connecting piece that slides on the sleeve plate, so that the protective mechanism can be adapted to hydraulic cylinders of different diameters; the size of the clamping space is adjusted according to the diameter of the cylinder body by the relatively set fastening plates, so that the protective device can be applied to hydraulic cylinders of different sizes; the fastening strips are adapted to the outer wall of the cylinder body of different diameters by the sequentially hinged fastening strips, thereby improving the clamping stability of the fastening mechanism; the anti-slip block and flexible anti-slip pad are adapted to the outer wall of the cylinder body, thereby improving the clamping stability of the fastening mechanism; the protective device is prevented from sliding on the cylinder body by the limiting block A and the limiting block B that slides on the slide rail to fix the slide rail on cylinder bodies of different lengths, so that the protective device can be applied to hydraulic cylinders of different sizes. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the internal structure of the present invention (I);

[0016] Figure 2 This is a schematic diagram of the structure of this utility model;

[0017] Figure 3 This is a schematic diagram (II) of the internal structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the fastening mechanism structure of this utility model;

[0019] Figure 5 This is a diagram showing the fastening mechanism of this utility model in use;

[0020] Figure 6 This is a cross-sectional view of the present invention;

[0021] As shown in the figure:

[0022] 1. Hydraulic cylinder; 2. Fastening mechanism; 3. Slide rail; 4. Protective mechanism; 5. Limiting block A; 6. Limiting block B; 7. Fastener B; 101. Cylinder body; 102. Piston rod; 201. Fastening plate; 202. Fastener A; 203. Anti-slip block; 204. Anti-slip pad; 401. Sleeve plate; 402. Connector; 403. Fastener C; 2011. Fastening strip; 2012. Fastening block; 4011. Long hole; 4021. Telescopic plate. Detailed Implementation

[0023] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0024] like Figure 1 , Figure 2 and Figure 3The hydraulic cylinder piston rod extension protection device of this utility model includes a fastening mechanism 2 provided on the cylinder body 101 of the hydraulic cylinder 1. The fastening mechanism 2 is provided with a slide rail 3 extending along the axial direction of the hydraulic cylinder 1. A protection mechanism 4 is slidably mounted on the slide rail 3. The piston rod 102 of the hydraulic cylinder 1 is located inside the protection mechanism 4, and the protection mechanism 4 is connected to the piston rod 102. The end of the protection mechanism 4 is connected to the end of the piston rod 102.

[0025] The slide rail 3 is fastened to the cylinder body 101 of the hydraulic cylinder 1 by the fastening mechanism 2, and the end of the protective mechanism 4 and the piston rod 102 are fixed together. After the hydraulic cylinder 1 is started, the piston rod 102 moves linearly back and forth on the cylinder body 101 and drives the protective mechanism 4 to slide back and forth on the slide rail 3. The protective mechanism 4 protects the piston rod 102.

[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 6 The protective mechanism 4 shown includes several sleeve plates 401 extending axially along the cylinder 1 and sliding on the slide rail 3; the sleeve plates 401 are provided with connecting members 402 that slide perpendicular to the axis of the sleeve plates 401, and adjacent sleeve plates 401 are connected by connecting members 402; the protective mechanism 4 includes four sleeve plates 401 evenly arranged around the axis of the cylinder 1, and the sleeve plates 401 are provided with sliding grooves, the axis of the sliding grooves being perpendicular to the coplanarity of the axis of the sleeve plates 401 and the axis of the cylinder 1; the connecting members 402 include telescopic plates 4021 located on both sides of the connecting members 402 and extending axially along the corresponding sliding grooves, the telescopic plates 4021 sliding in the corresponding sliding grooves; the sleeve plates 401 and the connecting members 402 together form the protective space of the protective mechanism 4, and the piston rod 102 is located in the protective space; the ends of the sleeve plates 401 are fixedly connected.

[0027] Pull or squeeze the sleeve 401, and the sleeve 401 moves toward or away from the axis of the protective mechanism 4. At the same time, the connecting piece 402 slides on the sleeve 401 until the diameters of the protective mechanism 4 and the oil cylinder 1 are matched.

[0028] like Figure 1-6 The fastening mechanism 2 shown includes fastening plates 201 arranged opposite each other, and the cylinder body 101 is located between the two fastening plates 201. The two fastening plates 201 are fixed together by fasteners A202. The fastening plates 201 have an arc-shaped structure, and the inner arc surface of the fastening plates 201 faces the cylinder body 101. The fasteners A202 are existing technologies and can be bolts and nuts. The fastening plates 201 have through holes that are compatible with bolts.

[0029] Fastener A202 is used to fasten the fastening plate 201, which is set opposite to the cylinder body 101, and the slide rail 3 is fastened to the cylinder body 101 of the oil cylinder 1 by the fastening mechanism 2.

[0030] like Figure 3-6The fastening plate 201 shown includes several fastening strips 2011 that are hinged together in sequence, and fastening blocks 2012 that are compatible with fasteners A202 are respectively hinged to both ends of the fastening plate 201. The fastening strips 2011 have an arc-shaped structure, and the inner arc surface of the fastening strips 2011 faces the cylinder body 101. Through holes that are compatible with bolts are located on the fastening strips 2011. The hinge axis of the fastening strips 2011 is parallel to the axis of the cylinder body 101, and the hinge axis of the fastening blocks 2012 is parallel to the axis of the cylinder body 101.

[0031] Two fastening plates 201 are placed on both sides of the cylinder body 101 respectively. The corresponding fastening blocks 2012 on the two fastening plates 201 are gradually tightened by the fastener A202. The fastening blocks 2012 rotate and drive the fastening strip 2011 to move along the surface of the cylinder body 101. The fastening strip 2011 rotates and gradually adapts to the outer wall of the cylinder body 101 until the end of the fastening strip 2011 is tightly attached to the outer wall of the cylinder body 101. The two fastening plates 201 are fixed to the cylinder body 101 by the fastener A202. The slide rail 3 is fastened to the cylinder body 101 of the oil cylinder 1 by the fastening mechanism 2.

[0032] like Figure 1-6 An anti-slip block 203 is hinged to the fastening strip 2011 shown, and a flexible anti-slip pad 204 is provided on the anti-slip block 203. The hinge axis of the anti-slip block 203 is parallel to the axis of the cylinder 101, and the anti-slip block 203 is hinged to the end of the fastening strip 2011. The anti-slip block 203 shares the hinge axis with the fastening strip 2011 and the fastening block 2012 respectively. The anti-slip pad 204 is located on the side of the anti-slip block 203 away from the hinge axis of the anti-slip block, and the side of the anti-slip pad 204 away from the anti-slip block 203 is provided with anti-slip texture. The slide rail 3 is fixedly connected to any anti-slip block 203. In this embodiment, the slide rail 3 is fixedly connected to the anti-slip block 203 in the middle part of the fastening plate 201.

[0033] Two fastening plates 201 are placed on both sides of the cylinder body 101. Fasteners A202 are used to gradually tighten the corresponding fastening blocks 2012 on the two fastening plates 201. The fastening blocks 2012 rotate, causing the fastening strip 2011 to move along the surface of the cylinder body 101. The fastening strip 2011 rotates and gradually adapts to the outer wall of the cylinder body 101. The anti-slip block 203 and anti-slip pad 204 move along the surface of the cylinder body 101 with the fastening strip 2011. The anti-slip block 203 drives the anti-slip pad 204. As the pad 204 rotates, the anti-slip pad 204 gradually adapts to the outer wall of the cylinder body 101. As the fastening strip 2011 tightens, the anti-slip pad 204 gradually deforms under the pressure of the fastening strip 2011 and the anti-slip block 203 and adapts to the outer wall of the cylinder body 101 until the anti-slip pad 204 completes the clamping of the cylinder body 101. The two fastening plates 201 are fixed to the cylinder body 101 by fastener A202, and the slide rail 3 is fastened to the cylinder body 101 of the oil cylinder 1 by the fastening mechanism 2.

[0034] like Figure 1-3The slide rail 3 shown is provided with a limiting block A5 and a limiting block B6, which are located at both ends of the cylinder body 101 respectively. The limiting blocks A5 and B6 extend toward the axis of the cylinder body 101, and the distance between the limiting block A5 and the axis of the cylinder body 101 is less than the distance between the anti-slip pad 204 and the axis of the cylinder body 101, and the distance between the limiting block B6 and the axis of the cylinder body 101 is less than the distance between the anti-slip pad 204 and the axis of the cylinder body 101.

[0035] Limiting blocks A5 and B6 are respectively set at both ends of cylinder body 101, and slide rail 3 is snapped onto cylinder body 101.

[0036] like Figure 1-5 The limiting block B6 shown is slidably mounted on the slide rail 3 along the axis of the cylinder 1, and the limiting block B6 is connected to the slide rail 3 by fastener B7; the fastener B7 is existing technology and can be a bolt, and the limiting block B6 has a screw hole that matches the fastener B7.

[0037] Limiting block A5 is fitted to one end of cylinder body 101. Limiting block B6 slides on slide rail 3 until limiting block B6 and the other end of cylinder body 101 are fitted together. Limiting block B6 and slide rail 3 are fixed together by fastener B7. Limiting block A5 and limiting block B6 are respectively set at both ends of cylinder body 101, and slide rail 3 is snapped onto cylinder body 101.

[0038] like Figure 1-3 The sleeve plate 401 shown has an elongated hole 4011 extending perpendicular to the axis of the sleeve plate 401. The connector 402 is connected to the sleeve plate 401 by a fastener C403 passing through the elongated hole 4011. The axis of the elongated hole 4011 is the same as that of the slide groove. The fastener C403 is existing technology and can be a bolt. The connector 402 has a screw hole that matches the fastener C403.

[0039] Pull or squeeze the sleeve 401, and the sleeve 401 moves toward or away from the axis of the protective mechanism 4. At the same time, the connector 402 slides on the sleeve 401 until the diameters of the protective mechanism 4 and the cylinder 1 are matched. The sleeve 401 and the connector 402 are then fixed together by the fastener C403.

[0040] In actual production, the sleeve plate 401 is pulled or squeezed, and the sleeve plate 401 moves toward or away from the axis of the protective mechanism 4. At the same time, the connecting piece 402 slides on the sleeve plate 401 until the diameters of the protective mechanism 4 and the oil cylinder 1 are matched. The sleeve plate 401 and the connecting piece 402 are then fixed together by the fastener C403.

[0041] Two fastening plates 201 are placed on both sides of the cylinder body 101. Fasteners A202 are used to gradually tighten the corresponding fastening blocks 2012 on the two fastening plates 201. The fastening blocks 2012 rotate, causing the fastening strip 2011 to move along the surface of the cylinder body 101. The fastening strip 2011 rotates and gradually adapts to the outer wall of the cylinder body 101. The anti-slip block 203 and anti-slip pad 204 move along the surface of the cylinder body 101 with the fastening strip 2011. The anti-slip block 203 drives the anti-slip pad 204. As the pad 204 rotates, the anti-slip pad 204 gradually adapts to the outer wall of the cylinder body 101. As the fastening strip 2011 tightens, the anti-slip pad 204 gradually deforms under the pressure of the fastening strip 2011 and the anti-slip block 203 and adapts to the outer wall of the cylinder body 101 until the anti-slip pad 204 completes the clamping of the cylinder body 101. The two fastening plates 201 are fixed to the cylinder body 101 by fastener A202, and the slide rail 3 is fastened to the cylinder body 101 of the oil cylinder 1 by the fastening mechanism 2.

[0042] Limiting block A5 is fitted to one end of cylinder body 101. Limiting block B6 slides on slide rail 3 until limiting block B6 and the other end of cylinder body 101 are fitted together. Limiting block B6 and slide rail 3 are fixed together by fastener B7. Limiting block A5 and limiting block B6 are respectively set at both ends of cylinder body 101, and slide rail 3 is snapped onto cylinder body 101.

[0043] The protective mechanism 4 and the end of the piston rod 102 are fixedly connected. After the oil cylinder 1 is started, the piston rod 102 moves linearly back and forth on the cylinder body 101 and drives the protective mechanism 4 to slide back and forth on the slide rail 3. The protective mechanism 4 protects the piston rod 102.

[0044] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A protective device for the extended piston rod of a hydraulic cylinder, characterized in that: It includes a fastening mechanism (2) installed on the cylinder body (101) of the oil cylinder (1), and a slide rail (3) extending along the axial direction of the oil cylinder (1) is provided on the fastening mechanism (2), and a protective mechanism (4) is slidably provided on the slide rail (3); the piston rod (102) of the oil cylinder (1) is located inside the protective mechanism (4), and the protective mechanism (4) and the piston rod (102) are connected.

2. The hydraulic cylinder piston rod extension protection device according to claim 1, characterized in that: The protective mechanism (4) includes several sleeves (401) that extend along the axial direction of the cylinder (1) and slide on the slide rail (3); the sleeves (401) are provided with connecting members (402) that slide in a direction perpendicular to the axis of the sleeves (401), and adjacent sleeves (401) are connected by connecting members (402).

3. The hydraulic cylinder piston rod extension protection device according to claim 1, characterized in that: The fastening mechanism (2) includes fastening plates (201) arranged opposite to each other, the cylinder body (101) is located between the two fastening plates (201), and the two fastening plates (201) are fixed together by fastener A (202).

4. The hydraulic cylinder piston rod extension protection device according to claim 3, characterized in that: The fastening plate (201) includes a number of fastening strips (2011) that are hinged in sequence, and fastening blocks (2012) that are adapted to fastener A (202) are respectively hinged at both ends of the fastening plate (201).

5. The hydraulic cylinder piston rod extension protection device according to claim 4, characterized in that: An anti-slip block (203) is hinged to the fastening strip (2011), and a flexible anti-slip pad (204) is provided on the anti-slip block (203).

6. The hydraulic cylinder piston rod extension protection device according to claim 1, characterized in that: The slide rail (3) is provided with a limiting block A (5) and a limiting block B (6), which are located at both ends of the cylinder body (101).

7. The hydraulic cylinder piston rod extension protection device according to claim 6, characterized in that: The limiting block B (6) is slidably mounted on the slide rail (3) along the axis of the oil cylinder (1), and the limiting block B (6) is connected to the slide rail (3) by fastener B (7).

8. The hydraulic cylinder piston rod extension protection device according to claim 2, characterized in that: The sleeve (401) has an elongated hole (4011) extending perpendicular to the axis of the sleeve (401), and the connector (402) is connected to the sleeve (401) by a fastener C (403) passing through the elongated hole (4011).

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