Rust removal device for inner wall of hydraulic oil cylinder

Abstract

The invention discloses a hydraulic oil cylinder inner wall rust removal device which is used for solving the technical problem that rust on the inner walls of a hydraulic support stand column and a jack cylinder barrel cannot be efficiently removed, and belongs to the technical field of oil cylinder inner wall rust removal. The device comprises a machine tool and further comprises a connecting disc, the connecting disc is a disc with the edge evenly provided with machine tool installation holes, a base is fixedly connected to one side of the connecting disc, a motor is installed on the base, a main shaft is coaxially connected to an output shaft of the motor, a sleeve is arranged on the outer side of the main shaft in a sleeving mode, and rotation between the main shaft and the sleeve is achieved through a bearing. The middle of the sleeve is fixed to the upper side of the base, and the main shaft is coaxially connected with a polishing assembly.

Description

Technical Field

[0001] The invention belongs to the technical field of rust removal on the inner wall of an oil cylinder, and in particular relates to a rust removal device on the inner wall of a hydraulic oil cylinder. Background Art

[0002] The hydraulic support is composed of columns, jacks, load-bearing structural parts, pushing devices, control systems and other auxiliary devices. The columns and jacks are responsible for completing functions such as support, frame moving, side protection and frame adjustment. Therefore, in the coal mining process in the comprehensive mining face, the columns and jacks play a vital role.

[0003] The normal operation of the columns and jacks is achieved by the pressure difference in the sealing cavity. However, since the service life of the seals is basically 1 year, when the hydraulic support has been in service underground in the coal mine for 1 year, the support is often inspected and repaired, especially the columns and jacks, which need to be disassembled and the seals replaced in order to be put into the next coal mining work.

[0004] Due to the high humidity in coal mines (relative humidity above 75%), S 2- There is a lot of dust containing corrosive substances, and the underground air contains harmful corrosive media and gases such as CO2, SO2, H2S, etc., forming a complex and special working environment of acid and alkaline corrosive media. Columns and jacks are the main bearing parts of hydraulic supports. During long-term service, their surfaces will be subjected to impact and corrosion, and will have different degrees of rust, pits and other defects, which will affect the sealing, causing failure or significant performance degradation during use. Therefore, after disassembling the columns and jacks, it is necessary to remove the rust from the components, especially the inner wall of the cylinder parts, which often forms rust or even pits.

[0005] There are two traditional repair processes: one is to hone the inner wall of the cylinder through a honing machine. The advantage is that it can well repair the inner wall roughness requirement of Ra0.4. The disadvantage is low efficiency. Severe rust with pits can only be discovered through honing, and it is impossible to make an accurate judgment on the degree of rust in time; the second is to remove rust from the inner wall of the cylinder through a portable simple polishing equipment, but this method is extremely inefficient and the quality of the inner wall after repair cannot meet the roughness requirement of Ra0.4. After replacing the seal, it will cause certain damage to the seal during use, affecting the mission of the seal and even affecting the normal performance of the column and jack. Summary of the invention

[0006] The invention aims to provide a device for removing rust from the inner wall of a hydraulic oil cylinder, which is used to solve the technical problem that the inner wall of a hydraulic support column and a jack cylinder cannot be efficiently removed from rust.

[0007] The present invention is achieved by adopting the following technical solutions: A device for removing rust from the inner wall of a hydraulic cylinder includes a machine tool and a coupling plate installed on a bracket in the machine tool by setting a machine tool mounting hole. The coupling plate is in the shape of a disc, and a base is fixedly connected to one side of the coupling plate. A motor is installed on the base, and the motor output shaft is coaxially connected to a main shaft. A sleeve is sleeved on the outside of the main shaft. The main shaft and the sleeve are rotated by a bearing. The middle part of the sleeve is fixed to the upper side of the base, and the main shaft is coaxially connected to a polishing assembly.

[0008] During use, bolts are passed through the mounting holes of the machine tool to connect the rust removal device for the inner wall of the hydraulic cylinder to the bracket in the machine tool with a connecting plate. The inner wall of the hydraulic cylinder is also clamped on the machine tool. The motor drives the spindle to rotate, and the spindle drives the polishing assembly to rotate. At the same time, the rust removal device for the inner wall of the hydraulic cylinder makes reciprocating linear motion with the bracket in the machine tool. During the process, the polishing assembly realizes the rust removal function on the inner wall of the hydraulic cylinder.

[0009] Further preferably, a circular boss is provided on the other side of the coupling disc, and a chamfer is provided on the outer side of the boss, so as to reduce the stress concentration of the boss, thereby improving the durability and safety of the coupling disc. This treatment can prevent the coupling disc from being worn or broken due to sharp corners during use. The boss is clearance-matched with the coupling hole of the machine tool, and the setting of the boss is conducive to rapid positioning of the coupling disc and the machine tool during assembly.

[0010] Further preferably, the base includes a support tube and a support plate, the support tube is axially arranged vertically, the bottom of the support tube is fixedly connected to the connecting plate, the support plate is used to support the motor, the support plate is vertically fixed to the support tube, the side of the support plate fixed to the support tube is set as an arc, the top of the support tube is fixedly connected to a lower cover plate, the lower cover plate is provided with a mounting hole 1, the lower cover plate is connected to an upper cover plate by bolts, and two or four platforms are evenly distributed on the outer periphery of the middle part of the sleeve, the sleeve passes through between the upper cover plate and the lower cover plate, and the upper cover plate and the lower cover plate are pressed on the platform of the sleeve.

[0011] Further preferably, reinforcing ribs are provided between the support tube and the connecting disk to enhance the connection strength between the support tube and the connecting disk.

[0012] Further preferably, a mounting through hole for fixing the motor is provided at the position where the support plate is connected to the motor, so as to facilitate connection of the motor to the base.

[0013] Further preferably, an oblique reinforcing tube connected to the supporting tube is provided on the lower side of the supporting plate to enhance the rigidity and stability of the base.

[0014] Further preferably, the polishing component includes a conversion shaft and a louver wheel, and an installation inner hole is provided on one side of the main shaft connected to the polishing component. The diameters on both sides of the conversion shaft are different and both are provided with threads. One side of the conversion shaft is threadedly connected to the installation inner hole, and the other side is sleeved with the louver wheel and then screwed with a nut. The louver wheel is assembled in a detachable manner, and louver wheels of different mesh sizes can be replaced at any time according to the roughness requirements of the inner wall of the hydraulic cylinder.

[0015] Further preferably, the motor output shaft and the main shaft are coaxially connected via a connecting sleeve, a blind hole with a keyway is provided on one side of the connecting sleeve, and a threaded inner hole is provided on the other side, one side of the connecting sleeve is connected to the motor output shaft, and the other side is connected to the main shaft, and the coaxial connection between the motor output shaft and the main shaft can provide rotational power to the main shaft through the motor.

[0016] Further preferably, an emulsion nozzle is provided on the outer side of the sleeve near one end of the polishing assembly to achieve a wet polishing effect.

[0017] Further preferably, a counterweight is provided on the outer side of the sleeve near one end of the motor, and the sleeve ensures the rigidity of the rust removal device on the inner wall of the hydraulic cylinder by adding the counterweight to the motor section.

[0018] The present invention combines the structural characteristics of an ordinary horizontal machine tool model CW61363B to design a set of rust removal aids for the inner walls of hydraulic columns and jack cylinders. At the same time, the rust removal aids are combined with the machine tool to transform into a set of rust removal devices for the inner walls of hydraulic cylinders by utilizing the connection principle between the small bracket and the middle bracket of the machine tool.

[0019] The beneficial effects of the present invention compared with the prior art are as follows: ① Compared with the portable simple polishing device, this device has greatly improved efficiency and the inner wall of the cylinder can reach the required roughness value after polishing; ② Compared with honing machine tools, this device has higher rust removal efficiency and can effectively determine the degree of rust on the inner wall of the cylinder, saving time in formulating repair plans and during the repair process; ③ The present invention is also suitable for the processing scope where the surface finish of the inner wall of cylindrical parts needs to be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 The structure of the present invention is shown in FIG. Figure 1 .

[0023] Figure 2 The structure of the present invention is shown in FIG. Figure 2 .

[0024] Figure 3 A schematic diagram of a connecting plate of the first embodiment is shown.

[0025] Figure 4 A schematic diagram of a polishing assembly according to a fourth embodiment is shown.

[0026] In the figure: 1-coupling plate, 11-machine tool mounting hole, 12-boss, 2-base, 21-support cylinder, 22-support plate, 23-lower cover plate, 24-upper cover plate, 25-reinforcement rib, 26-oblique reinforcement tube, 3-motor, 4-spindle, 41-coupling sleeve, 42-screw, 5-sleeve, 51-counterweight, 52-bearing cover, 6-bearing, 7-polishing assembly, 71-conversion shaft, 72-louver wheel, 73-nut, 8-emulsion nozzle. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0028] In the description, it should be noted that the terms "first" and "second" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] A device for removing rust from the inner wall of a hydraulic cylinder comprises a machine tool and a coupling plate 1. The coupling plate 1 is a circular plate with machine tool mounting holes 11 evenly distributed on its edge. A base 2 is fixedly connected to one side of the coupling plate 1, and a circular boss 12 is arranged on the other side. A chamfer is arranged on the outer side of the boss 12. The circular boss 12 can quickly locate the installation position of the coupling plate 1 and the middle bracket of the machine tool. The boss 12 of the coupling plate 1 is placed into the coupling hole of the machine tool, and then is installed on the middle bracket of the machine tool through the machine tool mounting hole 11. A motor 3 is installed on the base 2. The output shaft of the motor 3 is coaxially connected to a main shaft 4. A sleeve 5 is sleeved on the outer side of the main shaft 4. The rotation between the main shaft 4 and the sleeve 5 is achieved through a bearing 6. The middle part of the sleeve 5 is fixed to the upper side of the base 2, and the main shaft 4 is coaxially connected to a polishing component 7.

[0032] A counterweight 51 is provided on the outer side of the sleeve 5 near one end of the motor 3. Since the spindle 4 may be relatively long during actual use, the position where the spindle 4 is fixed to the base 2 may not be exactly the center of the spindle 4. By providing the counterweight 51, the torque from the spindle 4 to the base 2 on the left and right sides of the base 2 can be kept consistent, thereby facilitating the enhancement of the stability of the spindle 4 on the base 2 and the rigidity of the spindle 4 itself.

[0033] Embodiment 1. This embodiment combines the characteristics of an ordinary horizontal machine tool model CW61363B, utilizes the connection principle of the small bracket and the middle bracket of the machine tool, uses the boss 12 of the connecting plate 1 to connect with the original connecting hole of the machine tool, and uses bolts to pass through the machine tool mounting hole 11 to connect the rust removal device on the inner wall of the hydraulic cylinder to the middle bracket of the machine tool.

[0034] The coaxial connection between the output shaft of the motor 3 and the main shaft 4 can be achieved through a coupling. In this example, the output shaft of the motor 3 and the main shaft 4 are coaxially connected through a connecting sleeve 41. A blind hole with a keyway is provided on one side of the connecting sleeve 41, and a threaded inner hole is provided on the other side. One side of the connecting sleeve 41 is connected to the output shaft of the motor 3, and the other side is connected to the main shaft 4, so as to realize the function of the output shaft of the motor 3 driving the main shaft 4 to rotate synchronously.

[0035] like Figure 1 As shown, the outer wall of the preferred connecting sleeve 41 is provided with a top screw hole, and the connecting sleeve 41 is further fixed to the output shaft of the motor 3 and the main shaft 4 respectively by using screws 42 to prevent loosening.

[0036] The motor 3 can drive the spindle 4 to perform rotary motion, while the middle bracket of the machine tool drives the hydraulic cylinder inner wall rust removal device to perform reciprocating linear motion, thereby realizing the function of the polishing component 7 to polish and remove rust on the inner wall of the hydraulic cylinder.

[0037] In the second embodiment, the base 2 can be in the form of reference: it includes a support tube 21 and a support plate 22, the support tube 21 is axially vertically arranged, the bottom of the support tube 21 is fixedly connected to the connecting plate 1, the support plate 22 is used to support the motor 3, the support plate 22 is vertically fixed to the support tube 21, and the side where the support plate 22 is fixed to the support tube 21 is set as an arc, the top of the support tube 21 is fixedly connected with a lower cover plate 23, the lower cover plate 23 is provided with a mounting hole 1, the lower cover plate 23 is connected with an upper cover plate 24 by bolts, and two or four platforms are evenly distributed on the outer periphery of the middle part of the sleeve 5, the sleeve 5 passes through between the upper cover plate 24 and the lower cover plate 23, and the upper cover plate 24 and the lower cover plate 23 are pressed on the platform of the sleeve 5.

[0038] A reinforcing rib 25 is provided between the support tube 21 and the coupling plate 1 , a mounting through hole for fixing the motor 3 is provided at the position where the support plate 22 is connected to the motor 3 , and an oblique reinforcing tube 26 connected to the support tube 21 is provided on the lower side of the support plate 22 .

[0039] In this embodiment, the sleeve 5 is fixed by clamping the upper and lower cover plates 23 with bolts using the common machine tool tool clamping principle.

[0040] Embodiment three, as Figure 1 As shown, a sleeve 5 is disposed on the outer sleeve of the main shaft 4 , and the main shaft 4 and the sleeve 5 are rotated via a bearing 6 .

[0041] The specific implementation method can be: the sleeve 5 and the two ends of the main shaft 4 are connected through the bearing 6, the inner ring of the bearing 6 is fixed to the outer wall of the main shaft 4, and the outer ring of the bearing 6 is fixed to the inner wall of the sleeve 5. The two ends of the sleeve 5 are fixed by covering the bearing 6 with a bearing 6 cover 52 to protect the bearing 6.

[0042] In the fourth embodiment, the polishing assembly 7 includes a conversion shaft 71 and a louver wheel 72. The polishing assembly 7 can be coaxially connected to the main shaft 4 in the following manner: an installation inner hole is provided on one side where the main shaft 4 is connected to the polishing assembly 7, and the diameters on both sides of the conversion shaft 71 are different, and both are provided with threads. One side of the conversion shaft 71 is threadedly connected to the installation inner hole, and the other side is sleeved with the louver wheel 72 and then screwed with a nut 73. In order to enhance the stability of the connection, gaskets can be provided between the nut 73 and the louver wheel 72, and between the louver wheel 72 and the conversion shaft 71.

[0043] In the fifth embodiment, an emulsion nozzle 8 is provided on the outer side of the sleeve 5 near one end of the polishing assembly 7. A spraying device is provided on the sleeve 5, and the emulsion nozzle 8 of the spraying device sprays the emulsion on the polishing area, which can achieve a wet polishing effect, avoid dust pollution, and achieve the purpose of dust removal.

[0044] The present invention has the following advantages: (1) Greatly improve the repair efficiency of the inner wall of the hydraulic cylinder, reduce labor hours, and save processing costs; (2) The working principle of this device is the same as that of lathe cutting, so the shape and position tolerance and surface roughness of the inner wall of the hydraulic cylinder after repair can achieve ideal results; (3) Development trend: The operating principle of this device can be extended to the technical field where the surface roughness of the inner wall of cylindrical parts needs to be reduced.

[0045] The above is only a specific implementation of the present invention, which enables those skilled in the art to understand or implement the present invention. Although detailed descriptions are given with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments, and they should all be covered by the protection scope of the claims.

Claims

1. A rust removal device for the inner wall of a hydraulic cylinder, comprising a machine tool, characterized in that: The invention also comprises a coupling disc (1) mounted on a bracket in a machine tool by providing a machine tool mounting hole (11), the coupling disc (1) being in the shape of a disc, one side of the coupling disc (1) being fixedly connected to a base (2), a motor (3) being mounted on the base (2), an output shaft of the motor (3) being coaxially connected to a main shaft (4), a sleeve (5) being sleeved on the outside of the main shaft (4), the main shaft (4) and the sleeve (5) being rotatable via a bearing (6), the middle portion of the sleeve (5) being fixed to the upper side of the base (2), and the main shaft (4) being coaxially connected to a polishing assembly (7).

2. A rust removal device for the inner wall of a hydraulic cylinder according to claim 1, characterized in that: The polishing assembly (7) comprises a conversion shaft (71) and a shutter wheel (72); a mounting inner hole is provided on one side of the main shaft (4) connected to the polishing assembly (7); two sides of the conversion shaft (71) have different diameters and are both provided with threads; one side of the conversion shaft (71) is threadedly connected to the mounting inner hole, and the other side is sleeved with the shutter wheel (72) and then screwed with a nut (73).

3. A rust removal device for the inner wall of a hydraulic cylinder according to claim 1, characterized in that: A circular boss (12) is provided on the other side of the coupling plate (1), and a chamfer is provided on the outer side of the boss (12).

4. A rust removal device for the inner wall of a hydraulic cylinder according to claim 1, characterized in that: The base (2) comprises a support tube (21) and a support plate (22); the support tube (21) is axially arranged vertically; the bottom of the support tube (21) is fixedly connected to the connecting plate (1); the support plate (22) is used to support the motor (3); the support plate (22) is vertically fixed to the support tube (21); one side of the support plate (22) fixed to the support tube (21) is arranged in the form of an arc; a lower cover plate (23) is fixedly connected to the top of the support tube (21); a mounting hole 1 is arranged on the lower cover plate (23); the lower cover plate (23) is connected to an upper cover plate (24) by bolts; two or four platforms are evenly distributed on the outer periphery of the middle part of the sleeve (5); the sleeve (5) passes between the upper cover plate (24) and the lower cover plate (23); and the upper cover plate (24) and the lower cover plate (23) are pressed on the platform of the sleeve (5).

5. A rust removal device for the inner wall of a hydraulic cylinder according to claim 4, characterized in that: A reinforcing rib (25) is provided between the support tube (21) and the connecting plate (1).

6. A rust removal device for the inner wall of a hydraulic cylinder according to claim 4, characterized in that: A mounting through hole for fixing the motor (3) is provided at the position where the support plate (22) is connected to the motor (3).

7. A rust removal device for the inner wall of a hydraulic cylinder according to claim 4, characterized in that: An oblique reinforcement tube (26) connected to the support tube (21) is provided on the lower side of the support plate (22).

8. A rust removal device for the inner wall of a hydraulic cylinder according to any one of claims 1 to 7, characterized in that: The output shaft of the motor (3) and the main shaft (4) are coaxially connected via a connecting sleeve (41); a blind hole with a keyway is provided on one side of the connecting sleeve (41), and a threaded inner hole is provided on the other side; one side of the connecting sleeve (41) is connected to the output shaft of the motor (3), and the other side is connected to the main shaft (4).

9. A rust removal device for the inner wall of a hydraulic cylinder according to any one of claims 1 to 7, characterized in that: An emulsion nozzle (8) is provided on the outer side of the sleeve (5) at one end close to the polishing assembly (7).

10. A rust removal device for the inner wall of a hydraulic cylinder according to any one of claims 1 to 7, characterized in that: A counterweight block (51) is arranged on the outer side of the sleeve (5) at one end close to the motor (3).

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