A piston rod blank for a hydraulic cylinder

Abstract

This invention discloses a hydraulic cylinder piston rod blank, including a cylinder body. An annular groove is formed on the end face of the cylinder body, and a connecting sleeve is inserted into the annular groove. A guide assembly is fixedly connected to the end of the connecting sleeve. The guide assembly includes a cover, which is fixedly connected to the end face of the connecting sleeve. A turntable is fixedly connected to the outer wall of the cover. A through hole is formed on the surface of the cover, and a limiting groove is formed inside the through hole. This hydraulic cylinder piston rod blank, through the cooperation of the protrusion and the limiting groove, fixes the dustproof oil seal, preventing it from moving. Simultaneously, a limiting slider on the inner wall of the dustproof oil seal limits the sliding groove formed on the side wall of the rod. The connecting sleeve and cylinder body are fixedly connected together by fastening bolts, thereby preventing the cover from rotating or falling off, preventing the piston rod from rotating, and improving the stability of the piston rod after reciprocating motion.

Description

Technical Field

[0001] This invention relates to the field of hydraulic cylinder technology, specifically to a hydraulic cylinder piston rod blank. Background Technology

[0002] Hydraulic cylinder finishing is a pressure finishing process that utilizes the cold plasticity of metals at room temperature. A rolling tool applies pressure to the workpiece surface, causing the surface metal to plastically flow and fill the original residual low-recessed valleys, thus reducing the surface roughness. Due to the plastic deformation of the rolled surface metal, the surface structure undergoes cold hardening and grain refinement, forming a dense fibrous structure and a residual stress layer. This increases hardness and strength, thereby improving the workpiece's wear resistance, corrosion resistance, and fit.

[0003] In practical applications, after the hydraulic cylinder has been reciprocating for a long time, the piston rod will rotate, causing the lug connected to the piston rod to come out after a period of use. This results in poor connection stability, frequent maintenance, and reduced work efficiency. Furthermore, the existing hydraulic cylinders have a one-piece cylinder body, which makes maintenance and disassembly difficult. When damaged, the entire cylinder must be replaced, resulting in high maintenance costs. In view of this, we propose a hydraulic cylinder piston rod blank. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] The main objective of this invention is to provide a hydraulic cylinder piston rod blank that can prevent the piston rod from rotating, improve the stability of the piston rod after reciprocating motion, and facilitate maintenance and disassembly, thereby reducing maintenance costs.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this invention proposes a hydraulic cylinder piston rod blank, comprising a cylinder body with an annular groove on its end face. A connecting sleeve is inserted into the annular groove, and a guide assembly is fixedly connected to the end of the connecting sleeve. The guide assembly includes: a cover fixedly connected to the end face of the connecting sleeve, a turntable fixedly connected to the outer wall of the cover, a through hole on the surface of the cover, and a limiting groove inside the through hole, into which a dustproof oil seal is inserted; and a rod body with a sliding groove on its side wall, into which a limiting slider is slidably connected, and the limiting slider is fixedly connected to the inner ring wall of the dustproof oil seal. The dustproof oil seal is fixed by the interaction of the protrusion and the limiting groove, preventing movement. Simultaneously, the limiting slider on the inner wall of the dustproof oil seal limits the sliding groove on the side wall of the rod body. The connecting sleeve and cylinder body are fixedly connected together by fastening bolts, thus preventing the cover from rotating or falling off.

[0008] Preferably, the connecting sleeve is fixedly connected to the cylinder body by fastening bolts, thereby preventing the cover from rotating and falling off.

[0009] Preferably, the outer wall of the turntable has multiple sets of arrayed toothed grooves, which facilitates the rotation of the turntable after the fastening bolts limit the cover, making it easier to rotate the turntable.

[0010] Preferably, a protrusion is fixedly connected to the outer wall of the dustproof oil seal. The protrusion is inserted into the inside of the limiting groove. The protrusion is a rubber block that deforms under pressure and thus gets stuck in the limiting groove, making it easy to replace the dustproof oil seal after it ages.

[0011] Preferably, a piston assembly is provided inside the cylinder, the piston assembly including a piston head, the piston head being slidably connected inside the cylinder.

[0012] Preferably, a threaded rod is fixedly connected to the surface of the piston head. The threaded rod is threaded to the end of the rod body. By rotating the turntable, the cover drives the rod body to rotate. The threaded rod connects the end of the rod body to the piston head to form a whole, so that the piston head and the rod body can be separated for easy replacement.

[0013] Preferably, a piston oil seal is fixedly connected to the side wall of the piston head. The outer wall of the piston oil seal has four sets of arrayed notches. The notches are arranged in four sets and are arrayed on the side wall of the piston oil seal. They cooperate with the guide post to prevent the piston head from rotating during the connection with the rod body and to improve the stability of the piston head.

[0014] Preferably, the notch is provided with a wear-resistant rubber pad. During use, the wear-resistant rubber pad and the guide post generate friction, thereby preventing the piston oil seal from being damaged by friction and improving the service life of the piston oil seal.

[0015] Preferably, the wear-resistant rubber pad has a guide post slidably connected inside. The guide post is fixedly connected to the inner wall of the cylinder. There are four sets of guide posts, and the four sets of guide posts are distributed in an array. The four sets of guide posts guide the piston head, so that the piston head cannot rotate.

[0016] Beneficial effects

[0017] This invention provides a hydraulic cylinder piston rod blank. It has the following beneficial effects:

[0018] (1) The piston rod blank of the oil cylinder improves the stability of the piston rod after reciprocating motion. The cover and the connecting sleeve are an integral part, and the dustproof oil seal is fixed by the cooperation of the protrusion and the limiting groove, so as to prevent the dustproof oil seal from moving. At the same time, the limiting slider on the inner wall of the dustproof oil seal limits the sliding groove opened on the side wall of the rod. The connecting sleeve and the cylinder are fixed together by the fastening bolt, so as to prevent the cover from rotating and falling off, and to prevent the piston rod from rotating, thereby improving the stability of the piston rod after reciprocating motion.

[0019] (2) The piston rod blank of the oil cylinder guides the piston head through four sets of guide columns, so that the piston head moves while the threaded rod connects the end of the rod body to the piston head, so that the piston head cannot rotate, thereby improving the stability of the piston rod in reciprocating motion.

[0020] (3) The piston rod blank of the hydraulic cylinder can be separated from the piston head by releasing the fastening bolts from the connecting sleeve and rotating the cover. At the same time, the cover and the rod are separated from the inside of the cylinder, which facilitates maintenance and disassembly, and makes it easy to replace individual parts, avoiding the need to replace the entire hydraulic cylinder piston rod. This makes maintenance and disassembly convenient and reduces maintenance costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall device of the present invention;

[0023] Figure 2 This is a cross-sectional structural schematic diagram of the present invention;

[0024] Figure 3 This is an enlarged structural schematic diagram of point A in the present invention;

[0025] Figure 4 This is a top view of the piston assembly of the present invention.

[0026] Figure 5 This is an enlarged structural schematic diagram of section B of the present invention.

[0027] In the diagram: 1. Cylinder block; 2. Annular groove; 3. Connecting sleeve; 4. Fastening bolt; 5. Guide assembly; 51. Cover; 52. Turntable; 53. Limiting groove; 54. Dustproof oil seal; 55. Rod; 56. Slide groove; 57. Limiting slider; 58. Protrusion; 6. Piston assembly; 61. Piston head; 62. Threaded rod; 63. Piston oil seal; 64. Notch; 65. Wear-resistant rubber pad; 66. Guide column. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0030] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0031] Please see Figures 1-5 This invention provides a cylinder piston rod blank, including a cylinder body 1. An annular groove 2 is formed on the end face of the cylinder body 1. A connecting sleeve 3 is inserted into the annular groove 2. The connecting sleeve 3 is fixedly connected to the cylinder body 1 by fastening bolts 4. A guide component 5 is fixedly connected to the end of the connecting sleeve 3. A threaded hole is formed on the side wall of the cylinder body 1. The threaded hole communicates with the interior of the annular groove 2. The fastening bolts 4 are threadedly connected in the threaded hole and pass through and are threadedly connected to the connecting sleeve 3. Two sets of fastening bolts 4 are symmetrically arranged to enhance the stability of the connecting sleeve 3.

[0032] In this embodiment of the invention, the guide component 5 includes:

[0033] The cover 51 is fixedly connected to the end face of the connecting sleeve 3. The outer wall of the cover 51 is fixedly connected to the turntable 52. The surface of the cover 51 has a through hole, and the inside of the through hole has a limit groove 53. A dustproof oil seal 54 is inserted into the through hole of the cover 51.

[0034] And rod 55, a groove 56 is provided on the side wall of rod 55, a limiting slider 57 is slidably connected inside the groove 56, and the limiting slider 57 is fixedly connected to the inner ring wall of dustproof oil seal 54.

[0035] Specifically, the guide component 5 in this embodiment of the invention includes a cover 51, a turntable 52, a limiting groove 53, a dustproof oil seal 54, a rod 55, a sliding groove 56, and a limiting slider 57. The outer wall of the turntable 52 is provided with multiple sets of arrayed toothed grooves, and the outer wall of the dustproof oil seal 54 is fixedly connected with a protrusion 58, which is inserted into the inside of the limiting groove 53. An earring is fixedly connected to the end of the rod 55. The protrusion 58 is a rubber block that deforms under pressure and gets stuck in the limiting groove 53. It is also easy to replace after aging. The cover 51 and the connecting sleeve 3 are stamped into a whole by a stamping die. The cooperation between the protrusion 58 and the limiting groove 53 fixes the dustproof oil seal 54 and prevents it from moving. At the same time, the limiting slider 57 on the inner wall of the dustproof oil seal 54 limits the sliding groove 56 opened on the side wall of the rod 55, so that the rod 55, the dustproof oil seal 54 and the cover 51 form a whole. The connecting sleeve 3 and the cylinder 1 are fixedly connected by the fastening bolt 4, so as to prevent the cover 51 from rotating and falling off. Thus, the rod 55 will not rotate during the reciprocating movement.

[0036] In this embodiment of the invention, a piston assembly 6 is provided inside the cylinder body 1. The piston assembly 6 includes a piston head 61, which is slidably connected to the inside of the cylinder body 1. A threaded rod 62 is fixedly connected to the surface of the piston head 61, and the threaded rod 62 is threadedly connected to the end of the rod body 55. A piston oil seal 63 is fixedly connected to the side wall of the piston head 61. Four sets of arrayed notches 64 are provided on the outer wall of the piston oil seal 63. There are four sets of notches 64, and the four sets of notches 64 are arrayed on the side wall of the piston oil seal 63. A wear-resistant rubber pad 65 is provided inside the notch 64. A guide post 66 is slidably connected inside the wear-resistant rubber pad 65, and the guide post 66 is fixedly connected to the inner wall of the cylinder body 1. The piston head 61 is guided by four sets of guide pillars 66, preventing it from rotating during movement. Simultaneously, the piston oil seal 63 seals the contact point between the piston head 61 and the cylinder body 1, preventing internal liquid leakage. The fastening bolts 4 are released from their limiting position on the connecting sleeve 3. Rotating the turntable 52 causes the cover 51 to rotate, driving the rod 55 to rotate. Due to the limiting effect of the guide pillars 66, the piston head 61 cannot rotate. The threaded rod 62 connects the end of the rod 55 to the piston head 61, forming a single unit. The wear-resistant rubber pad 65 improves the service life of the piston oil seal 63 during use.

[0037] To prevent the piston rod from rotating and improve its stability during reciprocating motion, the cover 51 and the connecting sleeve 3 are integrated. The dust seal 54 is fixed in place by the cooperation of the protrusion 58 and the limiting groove 53, preventing the dust seal 54 from moving. At the same time, the limiting slider 57 on the inner wall of the dust seal 54 limits the sliding groove 56 on the side wall of the rod 55. The connecting sleeve 3 and the cylinder 1 are fixedly connected together by the fastening bolts 4, thereby preventing the cover 51 from rotating and falling off, preventing the piston rod from rotating, and improving the stability of the piston rod during reciprocating motion.

[0038] To improve the stability of the piston rod during reciprocating motion, four sets of guide pins 66 guide the piston head 61, so that the piston head 61 can not rotate during movement. At the same time, the threaded rod 62 connects the end of the rod body 55 to the piston head 61.

[0039] To facilitate maintenance and disassembly and reduce maintenance costs, the limiting position of the connecting sleeve 3 is released by loosening the fastening bolt 4 and rotating the cover 51, so that the rod 55 is separated from the piston head 61. At the same time, the cover 51 and the rod 55 are separated from the inside of the cylinder body 1, which facilitates maintenance and disassembly and makes it easier to replace individual parts, avoiding the need to replace the entire cylinder piston rod.

[0040] In this invention, during use, the dustproof oil seal 54 is inserted into the through hole on the surface of the cover 51. The protrusion 58 deforms under pressure, thereby locking into the limiting groove 53, thus limiting the dustproof oil seal 54 and preventing it from falling out of the cover 51. At the same time, the rod 55 is inserted into the dustproof oil seal 54. The limiting slider 57 on the inner wall of the dustproof oil seal 54 limits the sliding groove 56 on the side wall of the rod 55. By rotating the turntable 52, the cover 51 drives the rod 55 to rotate, connecting the end of the rod 55 to the piston head 61 to form a whole. The wear-resistant rubber pad 65 improves the service life of the piston oil seal 63 during use. The four sets of guide pillars 66 guide the piston head 61. The connecting sleeve 3 is fixedly connected to the cylinder 1 by the fastening bolts 4, thereby preventing the cover 51 from rotating and falling off, preventing the piston rod from rotating, and improving the stability of the piston rod after reciprocating motion.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An oil cylinder piston rod blank, comprising a cylinder body (1), an annular groove (2) is formed in the end face of the cylinder body (1), characterized in that: The inside of the annular groove (2) is inserted with a connecting sleeve (3), the end of the connecting sleeve (3) is fixedly connected with a guide assembly (5), the guide assembly (5) comprises: A cover (51) is fixedly connected on the end face of the connecting sleeve (3), the outer wall of the cover (51) is fixedly connected with a rotating disc (52), the surface of the cover (51) is provided with a through hole, and the inside of the through hole is provided with a limiting groove (53), the through hole of the cover (51) is inserted with a dustproof oil seal (54); And a rod body (55), the side wall of the rod body (55) is provided with a sliding groove (56), the inside of the sliding groove (56) is slidably connected with a limiting sliding block (57), the limiting sliding block (57) is fixedly connected on the inner ring wall of the dustproof oil seal (54); The inside of the cylinder body (1) is provided with a piston assembly (6), the piston assembly (6) comprises a piston head (61), the piston head (61) is slidably connected in the inside of the cylinder body (1); The surface of the piston head (61) is fixedly connected with a threaded rod (62), the threaded rod (62) is threadedly connected on the end of the rod body (55).

2. A cylinder barrel blank according to claim 1, characterized in that: The connecting sleeve (3) is fixedly connected with the cylinder body (1) through the fastening bolt (4).

3. The oil cylinder piston rod blank of claim 1, wherein: The outer wall of the rotating disc (52) is provided with a plurality of arrayed tooth-shaped grooves.

4. The oil cylinder piston rod blank of claim 1, wherein: The outer wall of the dustproof oil seal (54) is fixedly connected with a protruding block (58), the protruding block (58) is inserted in the inside of the limiting groove (53).

5. The oil cylinder piston rod blank of claim 1, wherein: The side wall of the piston head (61) is fixedly connected with a piston oil seal (63), the outer wall of the piston oil seal (63) is provided with four arrayed notches (64).

6. A cylinder barrel blank according to claim 5, characterized in that: The inside of the notch (64) is provided with a wear-resistant rubber pad (65).

7. A cylinder barrel blank according to claim 6, characterized in that: The inside of the wear-resistant rubber pad (65) is slidably connected with a guide column (66).

8. The oil cylinder piston rod blank of claim 7, wherein: The guide column (66) is fixedly connected on the inner wall of the cylinder body (1), the guide column (66) is provided with four groups, and the four groups of guide columns (66) are arrayed.

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