A guide sleeve for hydraulic oil cylinder

Abstract

The utility model relates to hydraulic pressure oil cylinder technical field, concretely is a kind of guide sleeve for hydraulic pressure oil cylinder, including fixed structure, guide sleeve and lubricating structure, fixed structure includes cylinder body;Guide sleeve includes sleeve body, sleeve body is clamped in the open place of cylinder body;Lubricating structure includes oil storage cavity, oil storage cavity is set up in the inside of sleeve body, and the oil seepage passage that oil storage cavity bottom is annular isohedral and is set up with the oil seepage passage of sleeve inner wall intercommunication is set up. In the utility model, after the piston rod is inserted into the inside of cylinder body, the sleeve body is set in the open place of cylinder body and is fixed, and a certain amount of lubricating oil is filled into oil storage cavity, and is temporarily stored in the inside of oil storage cavity, and flows into sleeve inner wall by each oil seepage passage, when piston rod telescopic sliding, lubricating liquid is coated on the side surface of piston rod, and continuous lubricating effect is provided.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically a guide sleeve for hydraulic cylinders. Background Technology

[0002] A hydraulic cylinder, also known as a hydraulic cylinder, is a hydraulic actuator that converts hydraulic energy into mechanical energy to perform linear reciprocating motion (or oscillating motion). It is simple in structure and reliable in operation. When used to achieve reciprocating motion, it eliminates the need for a speed reduction device and has no transmission backlash, resulting in smooth movement. Therefore, it is widely used in the hydraulic systems of various machines. To prevent the hydraulic rod on the hydraulic cylinder from deviating during movement, it is often used in conjunction with a guide sleeve.

[0003] When the current guide sleeve guides the hydraulic rod, the side surface of the hydraulic rod will directly rub against the inner wall of the guide sleeve and the sealing ring. Over time, wear is inevitable, so lubricating oil needs to be applied for maintenance. However, the current method of applying lubricating oil is to periodically apply lubricating oil to the exposed side surface of the hydraulic rod in the unfolded state of the hydraulic cylinder, which is inconvenient for maintenance. Utility Model Content

[0004] The purpose of this invention is to provide a guide sleeve for a hydraulic cylinder to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A guide sleeve for a hydraulic cylinder, comprising:

[0007] A fixed structure, the fixed structure including a cylinder body;

[0008] A guide sleeve, the guide sleeve comprising a sleeve body, the sleeve body being fitted into the opening on the cylinder body;

[0009] The lubrication structure includes an oil storage cavity, which is located inside the sleeve. The bottom of the oil storage cavity has annularly arranged oil seepage channels that communicate with the inner wall of the sleeve.

[0010] Furthermore, the fixing structure also includes:

[0011] The first retaining ring groove begins at the inner wall of the opening on the cylinder body;

[0012] A limiting ring, wherein the outer surface of the limiting ring is engaged with the groove of the first ring;

[0013] A retaining ring is attached to the upper surface of a limiting retaining ring.

[0014] Furthermore, the guide sleeve also includes:

[0015] The No. 1 sealing ring is fixedly sleeved on the outer surface of the sleeve body;

[0016] The second sealing ring is fixedly sleeved on the inner surface of the sleeve.

[0017] Furthermore, the guide sleeve also includes:

[0018] The second retaining ring groove is formed on the upper edge of the side surface of the sleeve body, and the second retaining ring groove is engaged with the inner surface of the limiting retaining ring.

[0019] The limiting slot is formed on the upper edge of the second retaining ring slot wall, and the limiting slot is engaged with the inner surface of the retaining spring.

[0020] Furthermore, the lubrication structure also includes:

[0021] An oil replenishment port is provided on one edge of the upper surface of the sleeve, and the lower end of the oil replenishment port is connected to the oil storage cavity.

[0022] A sealing bolt is screwed into the oil filler port.

[0023] Furthermore, the lubrication structure also includes:

[0024] A compensation groove is formed on the inner wall of the sleeve.

[0025] The oil outlet is arranged in a ring at equal angles and fixedly installed on the inner wall of the compensation groove. The oil outlet is connected to the lower opening of the oil seepage channel.

[0026] The ball bearing is movably embedded at the oil outlet.

[0027] Compared with the prior art, the beneficial effects of this utility model are:

[0028] 1. After inserting the piston rod into the cylinder body, the sleeve is placed on the opening of the cylinder body and fixed. A certain amount of lubricating oil is then filled into the oil reservoir and temporarily stored inside the oil reservoir. The lubricating oil flows into the inner wall of the sleeve through various oil seepage channels. When the piston rod slides back and forth, the lubricating oil is coated on the side surface of the piston rod to continuously provide lubrication.

[0029] 2. Lubricating oil is injected into the oil reservoir through the oil filling port and sealed with a sealing bolt. The oil leakage channel opening is then blocked by a ball bearing and an oil outlet to limit the oil flow. When the piston rod moves, the ball bearing rolls against the side surface of the piston rod, carrying out lubricating oil and coating it on the side surface of the piston rod. Utilizing the principle of ink dispensing from a ballpoint pen tip, continuous and stable oil lubrication is achieved. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0031] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0032] Figure 3 This is a schematic diagram of the fixing structure in this utility model;

[0033] Figure 4 This is a schematic diagram of the guide sleeve and lubrication structure in this utility model;

[0034] Figure 5 This is a schematic diagram of the oil outlet in this utility model.

[0035] In the diagram: 1. Fixed structure; 101. Cylinder body; 102. No. 1 retaining ring groove; 103. Limiting retaining ring; 104. Snap ring; 2. Guide sleeve; 201. Sleeve body; 202. No. 1 sealing ring; 203. No. 2 sealing ring; 204. No. 2 retaining ring groove; 205. Limiting retaining groove; 3. Lubrication structure; 301. Oil reservoir; 302. Oil supply port; 303. Sealing bolt; 304. Oil seepage channel; 305. Compensation groove; 306. Oil outlet; 307. Ball bearing. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] Please see Figure 1-5 In this embodiment of the present invention, a guide sleeve for a hydraulic cylinder includes a fixing structure 1, a guide sleeve 2, and a lubrication structure 3. The fixing structure 1 includes a cylinder body 101; the guide sleeve 2 includes a sleeve body 201, which is fitted onto the opening of the cylinder body 101; the lubrication structure 3 includes an oil storage cavity 301, which is opened inside the sleeve body 201. The bottom of the oil storage cavity 301 has an oil seepage channel 304 arranged in a ring at equal angles and communicating with the inner wall of the sleeve body 201.

[0038] Specifically, after the piston rod is inserted into the cylinder body 101, the sleeve 201 is fitted onto the opening of the cylinder body 101 and fixed. A certain amount of lubricating oil is then filled into the oil storage chamber 301 and temporarily stored inside the oil storage chamber 301. The lubricating oil then flows into the inner wall of the sleeve 201 through various oil seepage channels 304. When the piston rod slides back and forth, the lubricating oil is coated on the side surface of the piston rod to continuously provide lubrication.

[0039] Example 1

[0040] like Figure 1 As shown, in this embodiment, the guide sleeve 2 also includes a first sealing ring 202 and a second sealing ring 203. The first sealing ring 202 is fixedly sleeved on the outer surface of the sleeve body 201; the second sealing ring 203 is fixedly sleeved on the inner surface of the sleeve body 201.

[0041] In this embodiment, multiple No. 1 sealing ring 202 and No. 2 sealing ring 203 are provided and respectively fitted inside and outside the sleeve body 201 to provide a relatively comprehensive and stable sealing effect at the opening of the cylinder body 101.

[0042] like Figure 2-4 As shown, in this embodiment, the fixing structure 1 further includes a first retaining ring groove 102, a limiting retaining ring 103, and a retaining spring 104. The first retaining ring groove 102 begins at the inner wall of the opening on the cylinder body 101; the outer surface of the limiting retaining ring 103 engages with the first retaining ring groove 102; the retaining spring 104 is fitted onto the upper surface of the limiting retaining ring 103. The guide sleeve 2 further includes a second retaining ring groove 204 and a limiting retaining groove 205. The second retaining ring groove 204 is opened at the upper edge of the side surface of the sleeve body 201, and engages with the inner surface of the limiting retaining ring 103; the limiting retaining groove 205 is opened at the upper edge of the groove wall of the second retaining ring groove 204, and engages with the inner surface of the retaining spring 104.

[0043] In specific implementation, during installation, first insert the sleeve 201 into the opening of the cylinder 101, so that the first retaining ring groove 102 and the second retaining ring groove 204 form a complete retaining ring groove. Then, insert the limiting retaining ring 103 into the retaining ring groove to limit the overall position of the sleeve 201. Finally, snap the retaining spring 104 into the limiting retaining groove 205, and the retaining spring 104 abuts against the upper surface of the limiting retaining ring 103 to achieve mutual snapping and fixation.

[0044] Example 2

[0045] Based on Example 1, in order to supplement the specific method of applying lubricant to the piston rod side surface through lubrication structure 3, which was not mentioned in Example 1.

[0046] like Figure 5As shown, in this embodiment, the lubrication structure 3 further includes an oil replenishment port 302, a sealing bolt 303, a compensation groove 305, an oil outlet 306, and a ball bearing 307. The oil replenishment port 302 is located on one edge of the upper surface of the sleeve 201, and the lower end of the oil replenishment port 302 is connected to the oil storage cavity 301. The sealing bolt 303 is screwed into the oil replenishment port 302. The compensation groove 305 is located on the inner wall of the sleeve 201. The oil outlet 306 is arranged in a ring at equal angles and fixedly installed on the inner wall of the compensation groove 305. The oil outlet 306 is connected to the lower opening of the oil seepage channel 304. The ball bearing 307 is movably embedded at the outlet of the oil outlet 306.

[0047] In practice, lubricating oil is injected into the oil storage chamber 301 through the oil filling port 302, and the oil filling port 302 is sealed by the sealing bolt 303. Then, the lower opening of the oil seepage channel 304 is blocked by the ball bearing 307 and the oil outlet 306 to limit the oil output. When the piston rod moves, the ball bearing 307 rolls against the side surface of the piston rod, carrying out the lubricating oil and coating the side surface of the piston rod. By utilizing the principle of ink dispensing from a ballpoint pen tip, continuous and stable oil lubrication is achieved.

[0048] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims. Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This method of description is merely for clarity, and those skilled in the art should consider the specification as a whole. The technical solutions in the various embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A guide sleeve for a hydraulic cylinder, characterized in that, include: A fixed structure (1) is provided, the fixed structure (1) including a cylinder body (101); Guide sleeve (2), the guide sleeve (2) includes a sleeve body (201), the sleeve body (201) is fitted into the opening on the cylinder body (101); The lubrication structure (3) includes an oil storage cavity (301), which is located inside the sleeve (201). The bottom of the oil storage cavity (301) is provided with an oil seepage channel (304) that is arranged in an annular shape at equal angles and communicates with the inner wall of the sleeve (201).

2. The guide sleeve for a hydraulic cylinder according to claim 1, characterized in that, The fixing structure (1) also includes: A first retaining ring groove (102) is provided, which begins at the inner wall of the opening on the cylinder body (101); A limiting ring (103) is provided, wherein the outer surface of the limiting ring (103) is engaged with the first ring groove (102); A retaining ring (104) is attached to the upper surface of a limiting retaining ring (103).

3. The guide sleeve for a hydraulic cylinder according to claim 2, characterized in that, The guide sleeve (2) also includes: A first sealing ring (202) is fixedly sleeved on the outer surface of the sleeve body (201); The second sealing ring (203) is fixedly sleeved on the inner surface of the sleeve body (201).

4. The guide sleeve for a hydraulic cylinder according to claim 3, characterized in that, The guide sleeve (2) also includes: The second retaining ring groove (204) is opened on the upper edge of the side surface of the sleeve (201), and the second retaining ring groove (204) is engaged with the inner surface of the limiting retaining ring (103). The limiting slot (205) is opened on the upper edge of the groove wall of the second retaining ring slot (204), and the limiting slot (205) is engaged with the inner surface of the retaining spring (104).

5. The guide sleeve for a hydraulic cylinder according to claim 4, characterized in that, The lubrication structure (3) also includes: Oil replenishment port (302), the oil replenishment port (302) is opened on one edge of the upper surface of the sleeve (201), and the lower end of the oil replenishment port (302) is connected to the oil storage cavity (301); A sealing bolt (303) is screwed into the oil filler port (302).

6. The guide sleeve for a hydraulic cylinder according to claim 5, characterized in that, The lubrication structure (3) also includes: A compensation groove (305) is formed on the inner wall of the sleeve (201); Oil outlet (306) is fixedly installed on the inner wall of compensation groove (305) in a ring-shaped arrangement at equal angles. The oil outlet (306) is connected to the lower opening of oil seepage channel (304). The ball (307) is movably embedded at the oil outlet (306).

Images