Lifting oil cylinder with protection function

Abstract

The utility model relates to the technical field of lifting oil cylinders, and discloses a lifting oil cylinder with a protection function, which comprises an oil cylinder body, a box body is fixed on one side of the oil cylinder body through bolts, a filling port penetrating through the box body is arranged on the outer wall of one side of the box body, and a plugging component for plugging the filling port is arranged in the filling port. Two symmetrically-distributed extrusion rings are slidably connected into the box body, a plurality of evenly-distributed first receding grooves are formed in the opposite sides of the two extrusion rings, springs are welded to one sides of the first receding grooves, a plurality of second receding grooves are formed in the inner walls of the two sides of the box body, and the other ends of the springs are fixed to the second receding grooves. According to the piston, the extrusion ring is arranged and moves towards the middle, so that lubricating grease is kept in the transition groove for a long time, the situation that the lubricating grease is lost after the piston is used for a long time is avoided, damage to the piston is avoided, and the service life of the piston is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting oil cylinders, and more specifically to a lifting oil cylinder with a protective function. Background Art

[0002] The lifting cylinder is a type of hydraulic cylinder. The lifting cylinder basically consists of a cylinder sleeve and a piston rod. The pressure generated by the hydraulic oil pushes the piston rod to achieve the lifting purpose.

[0003] After searching, a Chinese patent document with the announcement number CN215949996U discloses a dump truck lifting cylinder, which uses a shaft elastic retaining ring and a key to perform buffering and deceleration, and uses a spacer to separate them to avoid mutual interference. During use, grease is applied between the piston rod of the lifting cylinder and the front end cover of the cylinder sleeve to prevent the piston rod from being damaged due to excessive wear. However, the grease will be worn after long-term use. If the wear is too much but not discovered in time, the piston rod will be worn more, resulting in damage to the piston rod. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a lifting cylinder with a protective function to solve the problems existing in the above-mentioned background technology.

[0005] The utility model provides the following technical solutions: a lifting oil cylinder with a protective function, comprising an oil cylinder body, a box body being fixed to one side of the oil cylinder body by bolts, a filling port penetrating through the box body is provided on an outer wall of one side of the box body, a sealing component for blocking the filling port is provided in the filling port, two symmetrically distributed extrusion rings are slidably connected to the inside of the box body, a plurality of evenly distributed first avoidance grooves are provided on opposite sides of the two extrusion rings, a spring is welded on one side of the first avoidance groove, a plurality of second avoidance grooves are provided on the inner walls on both sides of the box body, and the other end of the spring is fixed to the second avoidance groove, and a plurality of through holes penetrating through the box body are provided on the circumferential inner wall of the box body.

[0006] Furthermore, the plugging assembly includes a plug, which is an external hexagonal bolt, which is threadedly connected to the circumferential inner wall of the filling port, and a retaining ring is bonded to the inner wall of one side of the box body.

[0007] Furthermore, a slide is welded on one side inner wall of each of the first avoidance grooves, and one end of the slide passes through the box body and is slidably connected to the box body, and a scale is provided on the circumferential outer wall of each of the slides.

[0008] Furthermore, a rubber pad is bonded to an outer wall of one side of the box body, and the rubber pad is in contact with the external hexagonal bolt.

[0009] Furthermore, a transition groove is provided on the circumferential inner wall of the box body, and the transition groove is communicated with the through hole.

[0010] Furthermore, a plurality of guide rods are fixed between the inner walls on both sides of the box body by bolts, and the guide rods are slidably connected to the extrusion ring.

[0011] Furthermore, a sponge ring is bonded to an outer wall of one side of the box body, and the sponge ring is in contact with the piston of the oil cylinder body.

[0012] Furthermore, a plurality of limit blocks are welded to one side of the oil cylinder body, and the plurality of limit blocks are in contact with the box body.

[0013] Technical effects and advantages of the utility model:

[0014] 1. The utility model is provided with an extrusion ring, which moves toward the middle, so that the transition groove can maintain grease for a long time, thereby avoiding the loss of grease after the piston is used for a long time, thereby avoiding damage to the piston and increasing the service life of the piston.

[0015] 2. The utility model is provided with a retaining ring, which limits the two extrusion rings to prevent the extrusion rings from moving excessively and making it difficult to squeeze the extrusion rings back to their original positions using grease, thereby improving the convenience of the device.

[0016] 3. The utility model is provided with a scale, and the movement of the extrusion ring will drive the slide to move, so that the numbers on the scale match the outer surface of the box body, and then the position of the extrusion ring is read, so as to determine when to add grease, thereby improving the convenience of reading the grease residue. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0018] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model.

[0019] Figure 3 It is a schematic diagram of the enlarged structure of part A of the utility model.

[0020] Figure 4 It is a schematic diagram of the enlarged structure of part B of the utility model.

[0021] Figure 5 It is a partial enlarged structural schematic diagram of the utility model.

[0022] The accompanying drawings are marked as follows: 1. Cylinder body; 2. Limit block; 3. Box body; 4. Plug; 5. Sponge ring; 6. Extrusion ring; 7. Guide rod; 8. Rubber pad; 9. Filling port; 10. Retaining ring; 11. First avoidance groove; 12. Spring; 13. Second avoidance groove; 14. Slide; 15. Scale; 16. Through hole; 17. Transition groove. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative, and the present invention is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0024] Reference Figure 1-Figure 5 The utility model provides a lifting oil cylinder with a protective function, including an oil cylinder body 1, a box body 3 is fixed to one side of the oil cylinder body 1 by bolts, a sponge ring 5 is bonded to the outer wall of one side of the box body 3, and the sponge ring 5 is in contact with the piston of the oil cylinder body 1 to assist in cleaning the piston and prevent the grease on the surface of the piston from being stained with small stones, thereby causing abnormal wear on the piston, a filling port 9 is provided on the outer wall of one side of the box body 3, and a sealing component for blocking the filling port 9 is provided in the filling port 9, and two symmetrically distributed extrusion rings 6 are slidably connected inside the box body 3, and a plurality of evenly distributed first avoidance grooves 11 are provided on the opposite sides of the two extrusion rings 6, and a spring 12 is welded on one side of the first avoidance groove 11, and a plurality of second avoidance grooves 13 are provided on the inner walls of both sides of the box body 3, and the other end of the spring 12 is fixed to the second avoidance groove 13, and the box body 3 A plurality of through holes 16 penetrating the box body 3 are provided on the circumferential inner wall, and a transition groove 17 is provided on the circumferential inner wall of the box body 3, and the transition groove 17 is communicated with the through hole 16. The grease squeezed by the extrusion ring 6 will flow into the transition groove 17 through the through hole 16, thereby maintaining long-term lubrication of the piston. When in use, the grease is filled between the two extrusion rings 6 in the box body 3 through the filling port 9, so that the grease fills the transition groove 17 and the space between the two extrusion rings 6 in the box body 3, and the sealing component is used for sealing. At this time, the grease squeezes the extrusion ring 6, thereby causing the spring 12 to shrink and deform. When the grease in the transition groove 17 becomes less, the deformed spring 12 will squeeze the extrusion ring 6 to move toward the middle, so that the grease is maintained in the transition groove 17 for a long time, thereby avoiding the loss of grease after the piston is used for a long time, thereby avoiding damage to the piston and increasing the service life of the piston.

[0025] Among them, the blocking component includes a plug 4, which is an external hexagonal bolt. The external hexagonal bolt is threadedly connected to the circumferential inner wall of the filling port 9. The external hexagonal bolt is screwed into the filling port 9 to block the filling port 9. A rubber pad 8 is bonded to the outer wall of one side of the box body 3, and the rubber pad 8 is in contact with the external hexagonal bolt to assist in fixing the external hexagonal bolt and improve the seal between the external hexagonal bolt and the filling port 9 to prevent grease from flowing out of the filling port 9. A retaining ring 10 is bonded to the inner wall of one side of the box body 3. The retaining ring 10 limits the two extrusion rings 6 to prevent the extrusion ring 6 from moving excessively, making it difficult to use grease to squeeze the extrusion ring 6 back to its original position, thereby improving the convenience of the device.

[0026] Among them, a slide 14 is welded on the inner wall of one side of multiple first avoidance grooves 11, and one end of the slide 14 passes through the box body 3 and is slidably connected to the box body 3. The circumferential outer wall of the multiple slides 14 is provided with a scale 15. The movement of the extrusion ring 6 will drive the slide 14 to move, so that the numbers on the scale 15 and the outer surface of the box body 3 cooperate with each other, and then the position of the extrusion ring 6 can be read, so as to determine when to add grease, thereby improving the convenience of reading the grease residue.

[0027] Among them, multiple guide rods 7 are fixed between the inner walls on both sides of the box body 3 by bolts, and the guide rods 7 are slidably connected to the extrusion ring 6 to provide auxiliary guidance for the extrusion ring 6 to prevent the extrusion ring 6 from shaking in the box body 3 and improve the stability of the movement of the extrusion ring 6.

[0028] Among them, a plurality of limit blocks 2 are welded on one side of the oil cylinder body 1, and the plurality of limit blocks 2 are in contact with the box body 3 to limit the position of the box body 3, so that duplication positioning can be performed when the box body 3 is installed.

[0029] The working principle of the utility model is as follows: when in use, grease is added between the two extrusion rings 6 in the box body 3 through the filling port 9, so that the grease fills the space between the transition groove 17 and the two extrusion rings 6 in the box body 3, and the external hexagonal bolt is screwed into the filling port 9 to seal the filling port 9. At this time, the grease squeezes the extrusion ring 6, thereby causing the spring 12 to shrink and deform. When the grease in the transition groove 17 becomes less, the deformed spring 12 will squeeze the extrusion ring 6 to move toward the middle, so that the transition groove 17 maintains grease for a long time, thereby avoiding the loss of grease after the piston is used for a long time, thereby avoiding damage to the piston.

[0030] Finally, a few points should be explained: In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0031] In the drawings of the embodiments disclosed by the present invention, only the structures related to the embodiments disclosed by the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

Claims

1. A lifting cylinder with a protective function, comprising a cylinder body (1), characterized in that: One side of the oil cylinder body (1) is fixedly connected to a box body (3), one side outer wall of the box body (3) is provided with a filling port (9) penetrating the box body (3), and a blocking component for blocking the filling port (9) is provided inside the filling port (9); two symmetrically distributed extrusion rings (6) are slidably connected inside the box body (3), and opposite sides of the two extrusion rings (6) are provided with a plurality of evenly distributed first avoidance grooves (11), one side of the first avoidance groove (11) is fixedly connected with a spring (12), and the inner walls of both sides of the box body (3) are provided with a plurality of second avoidance grooves (13), and the other end of the spring (12) is fixed to the second avoidance groove (13), and the circumferential inner wall of the box body (3) is provided with a plurality of through holes (16) penetrating the box body (3).

2. The lifting cylinder with protective function according to claim 1, characterized in that: The plugging assembly comprises a plug (4), which is an external hexagonal bolt threadedly connected to the circumferential inner wall of the filling port (9); a retaining ring (10) is bonded to the inner wall of one side of the box body (3).

3. The lifting cylinder with protective function according to claim 1, characterized in that: A slide (14) is fixedly connected to the inner wall of one side of the plurality of first avoidance grooves (11), and one end of the slide (14) passes through the box body (3) and is slidably connected to the box body (3), and a scale (15) is provided on the circumferential outer wall of the plurality of slides (14).

4. The lifting cylinder with protective function according to claim 2, characterized in that: A rubber pad (8) is bonded to an outer wall of one side of the box body (3), and the rubber pad (8) is in contact with the external hexagonal bolt.

5. The lifting cylinder with protective function according to claim 1, characterized in that: A transition groove (17) is provided on the circumferential inner wall of the box body (3), and the transition groove (17) is communicated with the through hole (16).

6. The lifting cylinder with protective function according to claim 1, characterized in that: A plurality of guide rods (7) are fixedly connected between the inner walls on both sides of the box body (3), and the guide rods (7) are slidably connected to the extrusion ring (6).

7. The lifting cylinder with protective function according to claim 1, characterized in that: A sponge ring (5) is bonded to an outer wall of one side of the box body (3), and the sponge ring (5) is in contact with the piston of the oil cylinder body (1).

8. The lifting cylinder with protective function according to claim 7, characterized in that: A plurality of limit blocks (2) are fixedly connected to one side of the oil cylinder body (1), and the plurality of limit blocks (2) are in contact with the box body (3).

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