Oil pumping device of industrial robot gearbox

Abstract

The utility model relates to an oil pumping device of an industrial robot gearbox. The utility model is suitable for the technical field of robot oil pumping. The technical problem to be solved by the utility model is to provide the oil pumping device of the industrial robot gearbox. According to the technical scheme, an oil storage cavity is formed in the oil storage tank, the top of the oil storage tank is connected with an oil inlet pipe and an air inlet / outlet pipe which communicate with each other, and the bottom of the oil storage tank is connected with an oil outlet pipe; an air inlet of the vacuum generator is connected with an external compressed air source, and a vacuum port of the vacuum generator is communicated with the oil storage tank through an air inlet / outlet pipe and can generate negative pressure and form a negative pressure environment in the oil storage tank; the control valve assembly is provided with a first control valve and a second control valve, the first control valve is arranged between an air inlet of the vacuum generator and an external compressed air source, the second control valve is arranged between a vacuum opening of the vacuum generator and the air inlet / outlet pipe, and the first control valve and the second control valve are matched with each other to control and switch negative pressure or positive pressure generated in the oil storage tank.

Description

Technical Field

[0001] The utility model relates to the technical field of robot oil pumping, in particular to an oil pumping device for an industrial robot gear box. Background Art

[0002] The gearbox of the ABB industrial robot needs to be filled with 150 oil of the Synergy brand and 320 oil of the Mobil brand. In the maintenance of the robot, the oil in the gearbox of each joint of the robot needs to be replaced. It should be noted that during the replacement process, the viscous waste oil in the reduction box should be drained as much as possible to remove the various impurities (suspended in the waste oil) generated by the gear running-in to the outside of the robot, to ensure the maintenance effect of the gearbox of the robot joint and to increase the service life of the equipment.

[0003] At present, there are mainly the following oil discharge methods in the industry:

[0004] (1) Gravity flow. The disadvantage of this method is that it takes a long time to pump the oil and the oil in the gearbox is not completely discharged.

[0005] (2) Pressurized discharge: This method is faster, but the problem is that it is easy to damage the mechanical seal of the robot body joint gear box, and it will also lead to later failures. Utility Model Content

[0006] The technical problem to be solved by the utility model is: in view of the above existing problems, an oil pumping device for an industrial robot gear box is provided.

[0007] The technical solution adopted by the utility model is: an oil pumping device for an industrial robot gearbox, characterized in that it comprises:

[0008] The oil storage tank has an oil storage cavity inside, an oil inlet pipe and an air inlet / outlet pipe connected at the top, and an oil outlet pipe connected at the bottom;

[0009] A vacuum generator, whose air inlet is connected to an external compressed air source, and whose vacuum port is connected to the oil storage tank via the air inlet / outlet pipe, and the vacuum port can generate negative pressure and realize the formation of a negative pressure environment in the oil storage tank;

[0010] A control valve assembly, comprising a first control valve and a second control valve, wherein the first control valve is arranged between the air inlet of the vacuum generator and the external compressed air source, and the second control valve is arranged between the vacuum port of the vacuum generator and the inlet / outlet air pipe, and the first control valve and the second control valve cooperate with each other to control the switching of negative pressure or positive pressure in the oil storage tank;

[0011] The control valve assembly controls the vacuum port to be connected to the oil storage tank to generate negative pressure, and the oil storage tank pumps oil through the oil inlet pipe. The control valve assembly controls the external compressed air source to be connected to the oil storage tank to generate positive pressure, and the oil storage tank discharges oil through the oil outlet pipe.

[0012] Through the above-mentioned technical means, when it is necessary to use the oil storage tank to pump oil, by controlling the first control valve and the second control valve, the external compressed air source flows through the vacuum generator to generate negative pressure at its vacuum port, and the vacuum port of the vacuum generator is connected to the inside of the oil storage tank, so that a negative pressure environment is formed in the oil storage tank accordingly, and the oil storage tank pumps oil through the oil inlet pipe; when it is necessary to discharge the oil inside the oil storage tank, by controlling the first control valve and the second control valve, the external compressed air source is passed into the oil storage tank, a positive pressure environment is formed in the oil storage tank, and the oil storage tank is discharged through the oil outlet pipe. The negative pressure oil pumping speed is faster and will not damage the mechanical seal.

[0013] In some embodiments, the first control valve and the second control valve are both provided with an air inlet, a first air outlet connected to the air inlet in a normally closed state, a second air outlet, a second exhaust hole connected to the second air outlet in a normally closed state, and a first exhaust hole connected to the first air outlet in a normally open state. The air inlet of the first control valve is connected to the external compressed air source, the first air outlet of the first control valve is connected to the first exhaust hole of the second control valve, the second air outlet of the first control valve is connected to the air inlet of the vacuum generator, the vacuum port of the vacuum generator is connected to the second exhaust hole of the second control valve, and the first air outlet of the second control valve is connected to its second air outlet and the inlet / outlet pipes.

[0014] In some embodiments, a button assembly is also included, which has a first button and a second button. The first button and the second button are both connected to the control valve assembly. The first button can control the first control valve to be ventilated and the second control valve to be de-vented, thereby controlling the generation of negative pressure in the oil storage tank for oil extraction. The second button can control the first control valve to be de-vented and the second control valve to be ventilated, thereby controlling the generation of positive pressure in the oil storage tank for oil discharge.

[0015] In some embodiments, an air distributor block is provided between the second control valve and the air inlet / outlet pipe, and a positive pressure gauge and a negative pressure gauge are installed in the air distributor block.

[0016] Through the above-mentioned technical means, the pressure inside the oil storage tank can be measured using a positive pressure gauge and a negative pressure gauge, which is beneficial for the staff to directly observe the pressure conditions inside the oil storage tank. When it is known that the positive pressure or negative pressure is too large, corresponding measures can be taken in time to prevent the positive or negative pressure from causing damage to the oil storage tank.

[0017] In some embodiments, an oil mist filter is installed between the second control valve and the inlet / outlet air pipe.

[0018] Through the above technical means, the oil mist filter can be used to block the oil in the oil mist filter when oil is sucked out. The oil mist filter can discharge part of the blocked oil, thereby not affecting the overall gas line operation.

[0019] In some embodiments, a bracket for support is installed at the bottom of the oil storage tank.

[0020] In some embodiments, a valve for controlling oil outflow is installed on the oil outlet pipe of the oil storage tank.

[0021] The beneficial effects of the utility model are:

[0022] 1. The air circuit is controlled by the control valve assembly to adjust the air pressure environment in the oil tank. When the oil tank needs to pump oil from the robot body joint gear box, the external compressed air source is adjusted to the vacuum generator. The negative pressure generated by the vacuum generator forms a negative pressure environment in the oil tank, so that the oil tank pumps oil from the gear box under negative pressure. The negative pressure oil pumping method greatly increases the discharge speed compared to the gravity flow method, and reduces the risk of damaging the mechanical seal of the robot gear box compared to pressurized oil pumping. When the oil tank needs to discharge the pumped oil, the external compressed air source is adjusted to the oil tank, so that a positive pressure environment is formed in the oil tank, so that the oil tank discharges oil under positive pressure through the oil outlet pipe.

[0023] 2. The control valve assembly is controlled by the button assembly to adjust the different air pressure conditions in the oil storage tank according to the oil pumping or oil discharge conditions. The air-driven vacuum generator is used to form negative pressure to achieve automatic oil pumping, which reduces the labor intensity and tediousness of the operators in the past. It is safe to operate, recyclable, and has high operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the axial structure of this application.

[0025] Figure 2 It is a structural diagram of the first perspective of this application.

[0026] Figure 3 It is a structural diagram of the second viewing angle of this application.

[0027] Figure 4 It is a structural diagram of the third viewing angle of this application.

[0028] Figure 5 It is the pneumatic control principle diagram of this application.

[0029] Description of reference numerals:

[0030] 1. Oil storage tank; 1-1. Oil inlet pipe; 1-2. Air inlet / outlet pipe; 1-3. Oil outlet pipe; 2. First button; 3. Second button; 4. First control valve; 5. Second control valve; 6. Vacuum generator; 7. Air distributor block; 8. Oil mist filter; 9. Bracket. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution of the present utility model is further described below in conjunction with specific embodiments.

[0032] Combination Figures 1 to 4 As shown, the present embodiment is an oil pumping device for an industrial robot gearbox, comprising an oil storage tank 1, a vacuum generator 6, a control valve assembly and a button assembly. An oil storage cavity is provided inside the oil storage tank 1, and a connected oil inlet pipe 1-1 and an air inlet / outlet pipe 1-2 are connected to the top of the oil storage tank 1. The end of the air inlet / outlet pipe 1-2 extends into the oil storage cavity of the oil storage tank 1 for at least part of its length, so as to prevent the oil attached to the inside of the oil storage tank 1 from flowing into the air inlet / outlet pipe 1-2. A connected oil outlet pipe 1-3 is installed at the bottom of the oil storage tank 1, and a valve for controlling the oil outlet is installed on the oil outlet pipe 1-3. A bracket 9 for support is also provided at the bottom of the oil storage tank 1. A mounting plate is connected to the side wall of the oil storage tank 1, and a vacuum generator 6, a control valve assembly, an air distributor block 7 and a button assembly are installed on the mounting plate. The button assembly has a first button 2 and a second button 3. In the present embodiment, the main components are made of metal to ensure a long service life and are not easy to be damaged.

[0033] The control valve assembly comprises a first control valve 4 and a second control valve 5. Both the first control valve 4 and the second control valve 5 adopt a two-position five-way control valve. Both the first control valve 4 and the second control valve 5 have an air inlet, a first air outlet, a second air outlet, a first exhaust hole and a second exhaust hole. The air inlet is connected to the first air outlet in a normally closed manner, the first air outlet is connected to the first exhaust hole in a normally open manner, and the second air outlet is connected to the second exhaust hole in a normally closed manner. That is, when the first control valve 4 and the second control valve 5 are both cut off from air, the air inlet is connected to the first air outlet, and the second air outlet is connected to the second exhaust hole; when the first control valve 4 and the second control valve 5 are both ventilated, the air inlet is connected to the second air outlet, and the first air outlet is connected to the first exhaust hole.

[0034] The gas line connection of the oil pumping unit is as follows:

[0035] The input end of the air source triplet is connected to an external compressed air source of 0.5Mpa, and the output end of the air source triplet is connected to the air inlet of the first control valve 4, the first air outlet of the first control valve 4 is connected to the first exhaust hole of the second control valve 5, the second air outlet of the first control valve 4 is connected to the air inlet of the vacuum generator 6, the vacuum port of the vacuum generator 6 is connected to the second exhaust hole of the second control valve 5, the first air outlet of the second control valve 5 is connected to the second air outlet of the second control valve 5, and the first air outlet of the second control valve 5 is also connected to the inlet / outlet pipe 1-2 of the oil storage tank 1.

[0036] Furthermore, a gas distributor 7 is connected between the first gas outlet and the second gas outlet of the second control valve 5 and the inlet / outlet pipe 1-2, and an oil mist filter 8 is installed between the gas distributor 7 and the oil storage tank 1. A positive pressure gauge and a negative pressure gauge are installed on the gas distributor 7, and the positive pressure gauge and the negative pressure gauge can detect the air pressure inside the oil storage tank 1. If oil in the oil storage tank is sucked into the inlet / outlet pipe 1-2, the oil mist filter 8 can block the oil in the filter cavity inside it and discharge it through the switch inside the oil mist filter 8.

[0037] One end of the first control valve 4 is connected to the first button 2, and the other end of the first control valve 4 is connected to the second button 3. The first button 2 is connected to the second button 3, and the first control valve 4 is connected in parallel with the second control valve 5. When the first button 2 is pressed, the first control valve 4 is ventilated and the second control valve 5 is de-vented; when the second button 3 is pressed, the first control valve 4 is de-vented and the second control valve 5 is ventilated.

[0038] In this embodiment, the control device air pipe includes an air pipe connected between the first button 2, the second button 3, the first control valve 4, and the second control valve 5. The control device air pipes all use air pipes with a diameter of 6 mm to meet the flow requirements of the control function; the main air circuit air pipe includes an air source triplet, a first control valve 4, a vacuum generator 6, a second control valve 5, an air distributor block 7, and an air pipe connected between the inlet / outlet air pipes 1-2. The main air circuit air pipe uses an air pipe with a diameter of 12 mm. The larger diameter air pipe can ensure that the main air circuit has a sufficiently large flow rate, thereby better achieving the oil control effect.

[0039] like Figure 5 As shown, the implementation principle of the oil pumping device of an industrial robot gearbox in this embodiment is:

[0040] When the first button 2 and the second button 3 are not pressed, the external compressed air source is led to the air inlet of the first control valve 4 through the air source triplet. At this time, the air inlet in the first control valve 4 is connected to its first air outlet, and the external compressed air source is led to the first exhaust hole of the second control valve 5 through the first control valve 4. Since the first exhaust hole of the second control valve 5 is closed, the external compressed air source is not led to the oil storage tank 1. At the same time, the second exhaust hole in the first control valve 4 is connected to the second exhaust hole, but the second exhaust hole is not connected to the air source, so the vacuum generator 6 is not actuated, and its vacuum port does not generate negative pressure;

[0041] When the first button 2 is pressed, the external compressed air source is led to the air inlet of the first control valve 4 through the air source triplet. At this time, the air inlet and the second air outlet of the first control valve 4 are connected. The external compressed air source flows to the air inlet of the vacuum generator 6 through the first control valve 4. The vacuum port of the vacuum generator 6 generates negative pressure due to the external compressed air source at the air inlet. The vacuum port of the vacuum generator 6 is connected to the second exhaust hole of the second control valve 5. At this time, the second exhaust hole in the second control valve 5 is connected to the second air outlet. The vacuum port of the vacuum generator 6 is connected to the oil storage tank 1 through the second control valve 5 and the inlet / outlet pipe 1-2, so that a corresponding negative pressure environment is formed in the oil storage tank 1, and then the oil inlet pipe 1-1 of the oil storage tank 1 is used to negatively extract the oil in the joint gear box of the robot body;

[0042] When the second button 3 is pressed, the external compressed air source is connected to the air inlet of the first control valve 4 through the air source triplet. At this time, the air inlet of the first control valve 4 is connected to the first air outlet. The external compressed air source flows to the first exhaust hole of the second control valve 5 through the first control valve 4. The first exhaust hole in the second control valve 5 is connected to the first air outlet. Therefore, the external compressed air source is connected to the oil storage tank 1 through the first control valve 4, the second control valve 5 and the inlet / outlet pipe 1-2, so that a corresponding positive pressure environment is formed in the oil storage tank 1, and then the valve on the oil outlet pipe 1-3 of the oil storage tank 1 is opened to quickly discharge the oil in the oil storage tank 1.

[0043] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An oil pumping device for an industrial robot gearbox, characterized in that: include: The oil storage tank (1) has an oil storage cavity formed therein, is connected to an oil inlet pipe (1-1) and an air inlet / outlet pipe (1-2) at the top, and is connected to an oil outlet pipe (1-3) at the bottom; A vacuum generator (6), the air inlet of which is connected to an external compressed air source, the vacuum port being connected to the oil storage tank (1) via the air inlet / outlet pipe (1-2), the vacuum port being capable of generating negative pressure and achieving a negative pressure environment in the oil storage tank (1); A control valve assembly, comprising a first control valve (4) and a second control valve (5), wherein the first control valve (4) is arranged between the air inlet of the vacuum generator (6) and the external compressed air source, and the second control valve (5) is arranged between the vacuum port of the vacuum generator (6) and the air inlet / outlet pipe (1-2), and the first control valve (4) and the second control valve (5) cooperate with each other to control the switching of negative pressure or positive pressure generated in the oil storage tank (1); The control valve assembly controls the vacuum port to be connected to the oil storage tank (1) to generate negative pressure, and the oil storage tank (1) pumps oil through the oil inlet pipe (1-1). The control valve assembly controls the external compressed air source to be connected to the oil storage tank (1) to generate positive pressure, and the oil storage tank (1) discharges oil through the oil outlet pipe (1-3).

2. The oil pumping device for an industrial robot gearbox according to claim 1, characterized in that: The first control valve (4) and the second control valve (5) are both provided with an air inlet, a first air outlet connected to the air inlet in a normally closed state, a second air outlet, a second exhaust hole connected to the second air outlet in a normally closed state, and a first exhaust hole connected to the first air outlet in a normally open state. The air inlet of the first control valve (4) is connected to the external compressed air source, the first air outlet of the first control valve (4) is connected to the first exhaust hole of the second control valve (5), the second air outlet of the first control valve (4) is connected to the air inlet of the vacuum generator (6), the vacuum port of the vacuum generator (6) is connected to the second exhaust hole of the second control valve (5), and the first air outlet of the second control valve (5) is connected to its second air outlet and the air inlet / exit pipe (1-2).

3. The oil pumping device for an industrial robot gearbox according to claim 2, characterized in that: The invention also comprises a button assembly, wherein the button assembly comprises a first button (2) and a second button (3), wherein the first button (2) and the second button (3) are both connected to the control valve assembly, wherein the first button (2) can control the first control valve (4) to be ventilated and the second control valve (5) to be de-vented, thereby controlling the generation of negative pressure in the oil storage tank (1) for oil extraction, and the second button (3) can control the de-venting of the first control valve (4) and the ventilation of the second control valve (5), thereby controlling the generation of positive pressure in the oil storage tank (1) for oil discharge.

4. The oil pumping device for an industrial robot gearbox according to claim 1, characterized in that: An air distributor block is provided between the second control valve (5) and the air inlet / outlet pipe (1-2), and a positive pressure gauge and a negative pressure gauge are installed in the air distributor block.

5. The oil pumping device for an industrial robot gearbox according to claim 1, characterized in that: An oil mist filter (8) is installed between the second control valve (5) and the inlet / outlet air pipe (1-2).

6. The oil pumping device for an industrial robot gearbox according to claim 1, characterized in that: A support bracket (9) is installed at the bottom of the oil storage tank (1).

7. The oil pumping device for an industrial robot gearbox according to claim 1, characterized in that: The oil outlet pipe (1-3) of the oil storage tank (1) is provided with a valve for controlling oil outlet.

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