Self-heat-dissipation oil hydraulic cylinder guide column

Abstract

The utility model relates to the field of oil hydraulic cylinders, in particular to a self-heat-dissipation oil hydraulic cylinder guide column. The technical problem to be solved by the utility model is to provide the self-radiating oil hydraulic cylinder guide post which can effectively control the working temperature, prevent overheating abrasion and guarantee the guide precision and the service life. A self-heat-dissipation oil hydraulic cylinder guide column comprises an oil hydraulic cylinder body. A self-radiating guide column structure is fixedly arranged on the oil hydraulic cylinder body; the guide column structure comprises a fixing plate which is arranged on one side of a telescopic rod of the oil hydraulic cylinder body and fixedly connected with the oil hydraulic cylinder body. The movable plate is arranged on the side, away from the oil hydraulic cylinder body, of the fixed plate and fixedly connected with the telescopic rod of the oil hydraulic rod body through a locking nut. According to the utility model, the effects of effectively controlling the working temperature, preventing overheating abrasion and guaranteeing the guide precision and the service life are achieved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinders, and in particular to a self-cooling hydraulic cylinder guide column. Background Technology

[0002] 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, and can be used to achieve reciprocating motion. In existing technologies, for special hydraulic cylinder applications with particularly long strokes, severe load eccentricity, or extremely high linear accuracy requirements, the guide sleeve inside the end cover alone may not be sufficient to ensure the stability of the piston rod end. In such cases, one or more independent guide support columns are added externally to the hydraulic cylinder; as in the prior art document "CN205744679U". When the piston rod moves, the external guide rod slides along the fixed guide sleeve, providing additional support points away from the cylinder body, greatly enhancing bending stiffness and linearity. However, when the hydraulic cylinder is used at high frequencies, the guide rod and guide sleeve generate heat due to high-frequency sliding friction. Overheating can easily lead to accelerated wear of components, causing abnormal wear and scratches on the inner wall of the guide sleeve and the surface of the guide rod, ultimately compromising fit accuracy, reducing linearity, and shortening the service life of the guiding system. Therefore, there is an urgent need to develop a self-cooling hydraulic cylinder guide column that can effectively control the operating temperature, prevent overheating wear, and ensure guiding accuracy and service life. Utility Model Content

[0003] In order to overcome the shortcomings of high-frequency sliding friction generating heat in the guide rod and guide sleeve, which leads to overheating and accelerated wear of components, resulting in abnormal wear and scratches on the inner wall of the guide sleeve and the surface of the guide rod, ultimately compromising fit accuracy, reducing linearity of motion, and shortening the service life of the guide system, this utility model aims to provide a self-cooling oil cylinder guide column that can effectively control the working temperature, prevent overheating and wear, and ensure guiding accuracy and service life.

[0004] This utility model is achieved by the following specific technical means:

[0005] A self-cooling hydraulic cylinder guide column includes a hydraulic cylinder body, and a self-cooling guide column structure is fixedly installed on the hydraulic cylinder body.

[0006] The guide column structure includes a fixed plate disposed on one side of the hydraulic cylinder body telescopic rod and fixedly connected to the hydraulic cylinder body; a movable plate disposed on the side of the fixed plate away from the hydraulic cylinder body and fixedly connected to the hydraulic cylinder body telescopic rod by a locking nut; each end of the fixed plate is provided with a guide sleeve fixedly connected to the fixed plate; a guide rod is slidably disposed in each of the two guide sleeves, and the end of the guide rod near the movable plate is fixedly connected to the movable plate by a connecting bolt; a mounting hole is provided at the center of the end of the guide rod away from the movable plate, and a heat dissipation rod is fixedly disposed in the mounting hole; the heat dissipation rod includes a rod body fixedly disposed in the mounting hole of the guide rod, extending to the outside of the mounting hole of the guide rod, and a heat dissipation part integrally fixedly connected to the rod body.

[0007] Furthermore, the heat sink has a heat dissipation hole at its center that extends through both ends of the heat sink, and the guide rod and the outer diameter surface of the heat sink near the fixed plate have interconnected vent holes that are connected to the heat dissipation holes. When the hydraulic rod is installed vertically, a chimney-effect heat dissipation channel is formed, hot air is discharged from the top of the heat dissipation hole, and cold air is continuously drawn in from the bottom vent hole, forming a self-sustaining airflow circulation.

[0008] Furthermore, the heat-dissipating section includes several evenly spaced, ring-shaped heat dissipation fins; this increases the contact area with air and improves heat dissipation efficiency.

[0009] Furthermore, the heat sink body is fixed in the mounting hole provided on the guide rod by a clearance fit.

[0010] Furthermore, the heat sink is made of copper to ensure high thermal conductivity.

[0011] Furthermore, the inner wall of the mounting hole of the guide rod and the outer wall of the heat sink are filled with thermally conductive silicone grease or metal thermally conductive paste to improve the thermal conductivity between the contact surfaces.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This invention effectively controls the operating temperature, prevents overheating and wear, and ensures guiding accuracy and service life. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0015] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0016] Figure 3 This is a cross-sectional view of the heat sink of this utility model.

[0017] The markings in the attached diagram are as follows: 1-Hydraulic cylinder body, 2-Fixed plate, 3-Moving plate, 4-Locking nut, 5-Guide sleeve, 6-Guide rod, 7-Connecting bolt, 8-Heat dissipation rod, 81-Rod body, 82-Heat dissipation part, 83-Heat dissipation hole. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings: Example

[0019] A self-cooling oil cylinder guide column, such as Figure 1-3 As shown, it includes a hydraulic cylinder body 1, and a self-heating guide column structure is fixedly installed on the hydraulic cylinder body 1.

[0020] The guide column structure includes a fixed plate 2 located on one side of the telescopic rod of the hydraulic cylinder body 1 and fixedly connected to the hydraulic cylinder body 1; a movable plate 3 located on the side of the fixed plate 2 away from the hydraulic cylinder body 1 and fixedly connected to the telescopic rod of the hydraulic cylinder body via a locking nut 4; each end of the fixed plate 2 is provided with a guide sleeve 5 fixedly connected to the fixed plate 2; a guide rod 6 is slidably arranged in each of the two guide sleeves 5, and the end of the guide rod 6 near the movable plate 3 is fixedly connected to the movable plate 3 via a connecting bolt 7; a mounting hole is provided at the center of the end of the guide rod 6 away from the movable plate 3, and a heat dissipation rod 8 is fixedly arranged in the mounting hole; the heat dissipation rod 8 includes a rod body 81 fixedly arranged in the mounting hole of the guide rod 6, and a heat dissipation part 82 extending to the outside of the mounting hole of the guide rod 6 and integrally fixedly connected to the rod body 81.

[0021] The heat sink 8 has a heat dissipation hole 83 that runs through both ends of the heat sink 8. The guide rod 6 and the outer diameter surface of the heat sink 8 near the fixed plate 2 are provided with interconnected vent holes, which are connected to the heat dissipation hole 83.

[0022] Working principle:

[0023] When the hydraulic cylinder is installed vertically, the high-frequency reciprocating guide rod 6 and the guide sleeve 5 on the fixed plate 2 generate heat due to sliding friction. This heat is first conducted to the guide rod 6 and then efficiently transferred to the copper heat sink 8 body 81, which is tightly embedded in the central mounting hole of the guide rod 6, through the interface filled with thermally conductive silicone grease / metal thermal paste. The heat sink 8 quickly absorbs and diffuses the heat, transferring it to the heat dissipation part 82 extending from the guide rod 6 and its annular fins. At the same time, the heat dissipation hole 83 penetrating the center of the heat sink 8 and the guide rod 6 and the side of the heat sink 8 near the fixed plate 2 are connected. The interconnected vents form a vertical channel; heated air rises within the channel and exits from the top of the heat dissipation hole 83, creating a low-pressure zone that continuously draws in cold air through the bottom vents; this "chimney effect" based on the rising hot air creates a self-sustaining hot and cold air circulation; the cold air flows through the inner wall of the heat dissipation hole 83 and the outer surface of the finned heat dissipation part 82, efficiently carrying away heat and significantly enhancing the passive heat dissipation effect, thereby effectively controlling the working temperature of the guide rod 6 and the guide sleeve 5, preventing overheating and wear, and ensuring guiding accuracy and service life.

[0024] Although this disclosure has been described in detail with reference to exemplary embodiments, it is not limited thereto, and it will be apparent to those skilled in the art that various modifications and changes may be made thereto without departing from the scope of this disclosure.

Claims

1. A self-cooling hydraulic cylinder guide post, comprising a hydraulic cylinder body (1), characterized in that, A self-heating guide column structure is fixedly installed on the body of the hydraulic cylinder (1); The guide column structure includes a fixed plate (2) fixedly connected to the hydraulic cylinder body (1) on one side of the telescopic rod; a movable plate (3) fixedly connected to the hydraulic cylinder body telescopic rod by a locking nut (4) on the side of the fixed plate (2) away from the hydraulic cylinder body (1); a guide sleeve (5) fixedly connected to the fixed plate (2) at both ends; a guide rod (6) slidably arranged in the two guide sleeves (5); the end of the guide rod (6) near the movable plate (3) is fixedly connected to the movable plate (3) by a connecting bolt (7); a mounting hole is provided at the center of the end of the guide rod (6) away from the movable plate (3); a heat sink (8) is fixedly arranged in the mounting hole; the heat sink (8) includes a rod body (81) fixedly arranged in the mounting hole of the guide rod (6), extending to the outside of the mounting hole of the guide rod (6), and a heat dissipation part (82) integrally fixedly connected to the rod body (81).

2. The self-cooling oil cylinder guide column according to claim 1, characterized in that, The heat sink (8) has a heat dissipation hole (83) that runs through both ends of the heat sink (8) in the center. The guide rod (6) and the outer diameter surface of the heat sink (8) near the fixed plate (2) have interconnected ventilation holes, which are connected to the heat dissipation hole (83).

3. The self-cooling oil cylinder guide column according to claim 1, characterized in that, The heat dissipation section includes several heat dissipation fins arranged in a uniform ring at equal intervals.

4. The self-cooling oil cylinder guide column according to claim 1, characterized in that, The body (81) of the heat sink (8) is fixed in the mounting hole of the guide rod (6) by clearance fit.

5. The self-cooling oil cylinder guide column according to claim 1, characterized in that, The heat sink (8) is made of copper.

6. The self-cooling oil cylinder guide column according to claim 1, characterized in that, The space between the inner wall of the mounting hole of the guide rod (6) and the outer wall of the rod body (81) of the heat sink (8) is filled with thermal grease or metal thermal paste.

Images