Device and method for preventing piston rod from falling off from cylinder barrel

Abstract

The device comprises a fixed binding band, a movable binding band, a limiting rod and an eyelet bolt, the fixed binding band and the movable binding band are opposite in position, the movable binding band is hinged to one end of the fixed binding band, the other end of the movable binding band is movably connected with the fixed binding band through the eyelet bolt, and the outer wall of the fixed binding band is connected with an L-shaped connecting plate; the limiting rod comprises a limiting column and a connecting rod, the limiting column is connected to the lower portion of the connecting rod, and the limiting column is hinged to the lower portion of the L-shaped connecting plate. The invention further discloses a using method of the device for preventing the piston rod from falling off from the cylinder barrel. The piston rod can be fixed, the piston rod is prevented from falling off from the lifting oil cylinder, and it is guaranteed that the lifting oil cylinder and the piston rod are assembled smoothly.

Description

Technical Field

[0001] The invention belongs to the technical field of hydraulic cylinder maintenance, and in particular relates to a device and method for preventing a piston rod from falling off a cylinder barrel. Background Art

[0002] The cylinder rod, also known as the piston rod, is the core moving component of a hydraulic cylinder. Together with the cylinder barrel, piston, and end cap, it forms the hydraulic actuator, widely used in engineering machinery, mining equipment, and other fields. Piston rods are available in single-stage and multi-stage versions. Multi-stage lift cylinders have a longer piston rod stroke and are suitable for lifting large mining vehicle carriages.

[0003] When assembling the lifting cylinder and piston rod on site, the piston rod end of the lifting cylinder needs to be placed vertically downward, so the piston rod is easy to fall off suddenly, causing damage to the piston rod or injuring the operator. Summary of the Invention

[0004] The object of the present invention is to provide a device and method for preventing a piston rod from falling off from a cylinder, which can fix the piston rod and prevent the piston rod from falling off from a lifting cylinder, thereby ensuring smooth assembly of the lifting cylinder and the piston rod.

[0005] To achieve the above objectives, the technical solutions used in the present invention are:

[0006] The device for preventing the piston rod from falling off the cylinder includes: a fixed strap, a movable strap, a limit rod, and a movable bolt. The fixed strap and the movable strap are positioned relative to each other. One end of the movable strap is hinged to the fixed strap, and the other end is movably connected through the movable bolt. The outer wall of the fixed strap is connected to an L-shaped connecting plate; the limit rod includes: a limit column and a connecting rod. The limit column is connected to the lower part of the connecting rod, and the limit column is hinged to the lower part of the L-shaped connecting plate.

[0007] The cam is secured to the outside of the L-shaped plate and has a first notch, the second notch being secured to the outside of the L-shaped plate and a second notch. The arc plate is semicircular, with a second connecting ring provided on the outside of one end, a second connecting edge provided on the outside of the other end, a second connecting edge opening provided on the second connecting edge, a second connecting block connected to the outside of the second connecting edge, and a second connecting block through hole provided on the second connecting block; the second connecting ring is installed in the connecting ring notch, and a first bolt is installed on the first connecting ring and the second connecting ring; a third connecting ring is provided at one end of the movable bolt, and a movable nut is installed at the other end. The third connecting ring is hinged to the first connecting block through hole or the second connecting block through hole by the second bolt, and the limit column through hole and the connecting plate through hole are installed with a third bolt.

[0008] Furthermore, the first curved plate and the second curved plate are semicircular.

[0009] Furthermore, two opposite first connection blocks are connected to the outside of the first connection edge, and the two first connection blocks are respectively located on both sides of the opening of the first connection edge. Two opposite second connection blocks are connected to the outside of the second connection edge, and the two second connection blocks are respectively located on both sides of the opening of the second connection edge.

[0010] Furthermore, the two first connecting blocks are parallel to each other and perpendicular to the first connecting edge, the two second connecting blocks are parallel to each other and perpendicular to the second connecting edge, the L-shaped connecting plate includes two L-shaped connecting plate splits that are parallel to each other, the L-shaped connecting plate splits are provided with multiple connecting plate through holes, and the upper end side of the L-shaped connecting plate splits is connected to the side of the first arc-shaped plate.

[0011] Furthermore, the first connecting edge opening and the second connecting edge opening are positioned relative to each other; the third connecting ring is located between the two first connecting blocks, or the third connecting ring is located between the two second connecting blocks; the third connecting ring is located at the through hole of the first connecting block or the through hole of the second connecting block, the second bolt is installed in the through hole of the first connecting block and the third connecting ring, or the second bolt is installed on the through hole of the second connecting block and the third connecting ring, and the articulated nut is located on the outside of the first connecting block 12 or the second connecting block.

[0012] Furthermore, the upper end of the L-shaped connecting plate is connected to the middle portion of the side wall of the first arc-shaped plate.

[0013] Furthermore, a limiting pin is installed in the first connection block through hole or the second connection block through hole.

[0014] Furthermore, a rib plate is connected between the limiting column and the connecting rod, and the upper part of the limiting column is located between the two connecting plate parts.

[0015] A method for using a device for preventing a piston rod from falling off a cylinder, comprising:

[0016] Insert the limiting column into the piston rod hole of the piston rod head, loosen the swing nut, turn the swing bolt, rotate the second curved plate, and open the annular structure formed by the first curved plate and the second curved plate;

[0017] Rotate the L-shaped connecting plate to place the first curved plate of the fixed strap against the side of the cylinder, and rotate the movable strap to place the second curved plate of the movable strap against the side of the cylinder;

[0018] Turn the swing bolt into the bayonet formed by the two pairs of first connecting blocks and the second connecting blocks, install the swing nut on the swing bolt, rotate the swing nut to fix the cylinder in the annular structure formed by the first arc plate and the second arc plate, and place the lifting cylinder vertically for assembly.

[0019] The technical effects of the present invention include:

[0020] The present invention serves as an assembly auxiliary device, which can fix the piston rod, prevent the piston rod from falling off from the lifting cylinder during assembly, and ensure smooth assembly of the lifting cylinder and the piston rod.

[0021] When using the present invention, the fixed and movable straps are connected to form a ring that can be opened from one side. During use, the stopper is placed into the piston rod hole at the piston rod head. The fixed and movable straps are then connected to form a ring and clamped to the circumference of the cylinder barrel. This secures the piston rod in place, ensuring a smooth assembly process while avoiding safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of a device for preventing a piston rod from falling off from a cylinder barrel in the present invention;

[0023] Figure 2 It is a structural schematic diagram of the fixing strap in the present invention;

[0024] Figure 3 It is a structural schematic diagram of the movable binding strap in the present invention.

[0025] Figure 4 It is a structural schematic diagram of the limiting rod in the present invention;

[0026] Figure 5 It is a schematic diagram of the use state of the device for preventing the piston rod from falling off from the cylinder barrel in the present invention. DETAILED DESCRIPTION

[0027] The following description sufficiently illustrates specific embodiments of the invention to enable those skilled in the art to practice and reproduce the invention.

[0028] like Figure 1 FIG. 1 is a schematic diagram of the structure of the device for preventing the piston rod from falling off the cylinder in the present invention; FIG. Figure 2 As shown, it is a structural diagram of the fixing strap 1 in the present invention; Figure 3 , which is a schematic structural diagram of the movable binding strap 2 of the present invention.

[0029] The device for preventing the piston rod from falling off the cylinder includes: a fixed strap 1, a movable strap 2, a limiting rod 3, and a movable bolt 4. The fixed strap 1 and the movable strap 2 are semicircular, and the fixed strap 1 and the movable strap 2 are positioned relative to each other. The movable strap 2 is hinged to one end of the fixed strap 1, and the other end is movably connected by the movable bolt 4. The outer wall of the fixed strap 1 is connected to an L-shaped connecting plate 11, and the limiting rod 3 is hinged to the lower part of the L-shaped connecting plate 11.

[0030] The fixing strap includes: an L-shaped connecting plate 11, a first connecting block 12, and a first curved plate 13; the first curved plate 11 is semicircular, with a first connecting ring 14 provided on the outside of one end, the first connecting ring 14 is provided with a connecting ring notch, and a first connecting edge 15 is provided on the outside of the other end; the first connecting edge 15 is provided with a first connecting edge opening, the first connecting block 12 is connected to the outside of the first connecting edge 15, and the first connecting block 12 is provided with a first connecting block through hole 16; the upper end side of the L-shaped connecting plate 11 is connected to the side wall of the first curved plate 11, and the L-shaped connecting plate 11 is provided with multiple connecting plate through holes 17.

[0031] Two opposite first connection blocks 12 are connected to the outside of the first connection edge 15 . The two first connection blocks 12 are located on both sides of the opening of the first connection edge, and are parallel to each other and perpendicular to the first connection edge 15 .

[0032] The upper end of the L-shaped connecting plate 11 is connected to the middle of the side wall of the first arc-shaped plate 11. The L-shaped connecting plate 11 includes two L-shaped connecting plate parts that are parallel to each other. The L-shaped connecting plate parts are provided with a plurality of connecting plate through holes 17.

[0033] The movable strap 2 includes: a second curved plate 21 and a second connecting block 22. The second curved plate 21 is semicircular, with a second connecting ring 23 provided on the outside of one end and a second connecting edge 24 provided on the outside of the other end. The second connecting edge 24 is provided with a second connecting edge opening. The second connecting block 22 is connected to the outside of the second connecting edge 24, and the second connecting block 22 is provided with a second connecting block through hole 25.

[0034] Two second connecting blocks 22 are connected to the outside of the second connecting edge 24 . The two second connecting blocks 22 are located on both sides of the opening of the second connecting edge. The two second connecting blocks 22 are parallel to each other and perpendicular to the second connecting edge 24 .

[0035] For ease of preparation, the first connecting ring 14 and the second connecting ring 23 are formed by bending.

[0036] The second connecting ring 23 is installed in the connecting ring gap, and the first bolt 5 is installed on the first connecting ring 14 and the second connecting ring 23 to hinge the movable strap 2 to one end of the fixed strap 1.

[0037] The first connecting edge 15 and the second connecting edge 24 are positioned relative to each other, and the opening of the first connecting edge and the opening of the second connecting edge are positioned relative to each other; a third connecting ring is provided at one end of the hinged bolt 4, and a hinged nut 41 is installed at the other end. The third connecting ring is located between the two first connecting blocks 12, or between the two second connecting blocks 22. The third connecting ring is located at the through hole 16 of the first connecting block or the through hole 25 of the second connecting block. The second bolt 6 is installed at the through hole 16 of the first connecting block and the third connecting ring, or the second bolt 6 is installed on the through hole 25 of the second connecting block and the third connecting ring. The second bolt 6 is hinged to the first connecting block 12 or the second connecting block 22. After the fixed strap 1 and the movable strap 2 are closed, the hinged nut 41 is located on the outside of the first connecting block 12 or the second connecting block 22.

[0038] The swing bolt 4 is located between the two first connecting blocks 12 and the two second connecting blocks 22, and in the first connecting edge opening and the second connecting edge opening. A limit pin is installed in the first connecting block through hole 16 or the second connecting block through hole 25 to prevent the swing bolt 4 from moving away.

[0039] like Figure 4 , which is a schematic structural diagram of the limiting rod 3 in the present invention.

[0040] The limiting rod 3 includes a limiting column 31 and a connecting rod 32 . The limiting column 31 is connected to the lower portion of the connecting rod 32 . The limiting column 31 is provided with a plurality of limiting column through holes 33 .

[0041] A rib plate 34 is connected between the limiting column 31 and the connecting rod 32 .

[0042] The upper portion of the limiting post 31 is located at the connecting plate through-hole 17. A third bolt 7 is installed in the limiting post through-hole 33 and the connecting plate through-hole 17, hingedly connecting the upper portion of the limiting post 31 to the lower portion of the L-shaped connecting plate 11. The third bolt 7 can be installed in different limiting post through-holes 33 and connecting plate through-holes 17 to adjust the hinge position of the limiting post 31 and adjust its length.

[0043] The upper portion of the limiting column 31 is located between the two L-shaped connecting plate parts.

[0044] One end of the fixed strap 1 and the movable strap 2 is hingedly installed in the first connecting ring 14 and the second connecting ring 23 through the first bolt 5, and the other end is hinged to the first connecting block 12 or the second connecting block 22 through the second bolt 6, and the first connecting block 12 and the second connecting block 22 are connected by the movable bolt 4 and the movable nut 41 to realize the closure of the fixed strap 1 and the movable strap 2; the movable strap 2 can be freely flipped around the first bolt 5, and the movable bolt 4 can be freely flipped around the second bolt 6.

[0045] like Figure 5 , which is a schematic diagram of the use state of the device for preventing the piston rod from falling off from the cylinder barrel in the present invention.

[0046] The method of using the device to prevent the piston rod from falling off the cylinder is as follows:

[0047] Step 1: Insert the limiting column 31 into the piston rod hole 81 at the head of the piston rod 8, loosen the swing nut 41, turn the swing bolt 4, rotate the second curved plate 21, and open the annular structure formed by the first curved plate 13 and the second curved plate 21;

[0048] The piston rod 8 of the lifting cylinder is installed in the cylinder 9. The piston rod 8 extends from the cylinder 9 under the pushing action of the hydraulic oil, and the piston rod 8 pushes the car to flip. During maintenance or assembly, there is no hydraulic oil in the cylinder 9, so the piston rod 8 can freely extend and retract in the cylinder 8.

[0049] Step 2: Rotate the L-shaped connecting plate 11 to place the first curved plate 13 of the fixed strap 1 against the side of the cylinder 9, and rotate the movable strap 2 to place the second curved plate 21 of the movable strap 2 against the side of the cylinder 9;

[0050] Step 3: Turn the swing bolt 4 into the bayonet formed by the two pairs of first connecting blocks 12 and second connecting blocks 22, install the swing nut 41 on the swing bolt 4, rotate the swing nut 41 to fix the cylinder 9 in the annular structure formed by the first curved plate 13 and the second curved plate 21, and place the lifting cylinder vertically for assembly.

[0051] After the lifting cylinder is fixed, it is placed vertically for assembly. The limit column 31 is inserted into the head of the piston rod 8, which can limit the piston rod 8 from extending from the cylinder barrel 9, preventing the piston rod 7 from suddenly falling off and causing damage, while avoiding safety accidents and eliminating safety hazards.

[0052] The terms used in this invention are descriptive and exemplary, rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the technical solution, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope of the appended claims. Therefore, all changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. A device for preventing a piston rod from falling off a cylinder, characterized in that: include: The fixed strap, the movable strap, the limit rod and the movable bolt are positioned relative to each other. The movable strap is hinged to one end of the fixed strap and the other end is movably connected through the movable bolt. The outer wall of the fixed strap is connected to an L-shaped connecting plate; the limit rod includes: a limit column and a connecting rod. The limit column is connected to the lower part of the connecting rod, and the limit column is hinged to the lower part of the L-shaped connecting plate.

2. The device for preventing the piston rod from falling off from the cylinder according to claim 1, characterized in that: The fixing strap comprises: an L-shaped connecting plate, a first connecting block, and a first curved plate; a first connecting ring is provided on the outer side of one end of the first curved plate, the first connecting ring is provided with a connecting ring notch, and a first connecting edge is provided on the outer side of the other end; the first connecting edge is provided with a first connecting edge opening, the first connecting block is connected to the outer side of the first connecting edge, and the first connecting block is provided with a first connecting block through hole; the upper end side portion of the L-shaped connecting plate is connected to the side wall of the first curved plate, the L-shaped connecting plate is provided with a plurality of connecting plate through holes, and the limiting column is provided with a plurality of limiting column through holes; the movable strap comprises: a second curved plate, a second connecting block, a second curved plate The plate is semicircular, with a second connecting ring provided on the outside of one end, a second connecting edge provided on the outside of the other end, a second connecting edge opening provided on the second connecting edge, a second connecting block connected to the outside of the second connecting edge, and a second connecting block through hole provided on the second connecting block; the second connecting ring is installed in the connecting ring notch, and a first bolt is installed on the first connecting ring and the second connecting ring; a third connecting ring is provided at one end of the movable bolt, and a movable nut is installed at the other end. The third connecting ring is hinged to the first connecting block through hole or the second connecting block through hole by the second bolt, and the limit column through hole and the connecting plate through hole are installed with a third bolt.

3. The device for preventing the piston rod from falling off from the cylinder according to claim 2, characterized in that: The first curved plate and the second curved plate are semicircular.

4. The device for preventing the piston rod from falling off from the cylinder according to claim 2, characterized in that: Two opposite first connection blocks are connected to the outside of the first connection edge, and the two first connection blocks are respectively located on both sides of the opening of the first connection edge. Two opposite second connection blocks are connected to the outside of the second connection edge, and the two second connection blocks are respectively located on both sides of the opening of the second connection edge.

5. The device for preventing the piston rod from falling off from the cylinder according to claim 4, characterized in that: The two first connecting blocks are parallel to each other and perpendicular to the first connecting edge, the two second connecting blocks are parallel to each other and perpendicular to the second connecting edge, the L-shaped connecting plate includes two L-shaped connecting plate splits that are parallel to each other, the L-shaped connecting plate splits are provided with multiple connecting plate through holes, and the upper end side of the L-shaped connecting plate splits is connected to the side of the first arc-shaped plate.

6. The device for preventing the piston rod from falling off from the cylinder according to claim 4, characterized in that: The first connecting edge opening and the second connecting edge opening are positioned opposite to each other; the third connecting ring is located between the two first connecting blocks, or the third connecting ring is located between the two second connecting blocks; the third connecting ring is located at the through hole of the first connecting block or the through hole of the second connecting block, the second bolt is installed on the through hole of the first connecting block and the third connecting ring, or the second bolt is installed on the through hole of the second connecting block and the third connecting ring, and the articulated nut is located on the outside of the first connecting block 12 or the second connecting block.

7. The device for preventing the piston rod from falling off from the cylinder according to claim 2, characterized in that: The upper end of the L-shaped connecting plate is connected to the middle portion of the side wall of the first arc-shaped plate.

8. The device for preventing the piston rod from falling off from the cylinder according to claim 2, characterized in that: A limiting pin is installed in the first connection block through hole or the second connection block through hole.

9. The device for preventing the piston rod from falling off from the cylinder according to claim 5, characterized in that: A rib plate is connected between the limiting column and the connecting rod, and the upper part of the limiting column is located between the two connecting plate parts.

10. The method for using the device according to any one of claims 1 to 9, characterized in that: include: Insert the limiting column into the piston rod hole of the piston rod head, loosen the swing nut, turn the swing bolt, rotate the second curved plate, and open the annular structure formed by the first curved plate and the second curved plate; Rotate the L-shaped connecting plate to place the first curved plate of the fixed strap against the side of the cylinder, and rotate the movable strap to place the second curved plate of the movable strap against the side of the cylinder; Turn the swing bolt into the bayonet formed by the two pairs of first connecting blocks and the second connecting blocks, install the swing nut on the swing bolt, rotate the swing nut to fix the cylinder in the annular structure formed by the first arc plate and the second arc plate, and place the lifting cylinder vertically for assembly.

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