Efficient gravity balancing device for machine tool

Abstract

The utility model discloses an efficient gravity balancing device for a machine tool, which comprises an oil filling funnel, a first pipeline, a pressure storage device, a nitrogen cylinder, a connecting energy accumulator, a second pipeline, a spindle box and a balancing cylinder body, the oil filling funnel is connected with the pressure storage device through the first pipeline, the connecting energy accumulator is arranged between the nitrogen cylinder and the pressure storage device, and the second pipeline is connected with the nitrogen cylinder. The balance cylinder body is installed on the spindle box, and the two ends of the second pipeline are connected with the energy accumulator and the balance cylinder body respectively. The nitrogen cylinder is externally connected with the air pipe to form connection with the balance cylinder, a closed control system is formed, gravity balance of Z-axis movement is achieved by matching with a machine tool mechanical structure balance device, and the device has the advantages of being simple in structure, convenient to maintain, low in cost and high in reliability and safety. The situation that the motor alarms or is damaged due to the fact that the Z-axis moving load is large in the operation process of the machine tool is effectively avoided, and the practical value is extremely high.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tools, in particular to a high-efficiency gravity balancing device for machine tools. Background Art

[0002] For medium and large vertical machining center machines, heavy cutting requires a relatively large cutting force, which requires the spindle and the spindle box to have relatively high rigidity and the spindle motor to have relatively high power. Furthermore, in order to meet the requirements of high rigidity and heavy cutting, the spindle, the spindle box and the spindle motor are relatively large in size, and the weight of the synchronous spindle box unit is increased. During the operation of the machine tool, the moving load of the Z axis is very large. Under long-term continuous operation, the Z axis drive motor will alarm or even burn out due to the excessive load of instantaneous start and stop. Therefore, in order to reduce the load of the Z axis drive motor, it is necessary to add a gravity balance system. The traditional gravity balance system usually uses a heavy mechanical counterweight to achieve gravity balance, which has a complex structure and poor reliability and safety. For this reason, we propose an efficient gravity balance device for machine tools to solve the problems raised in the above background technology. Utility Model Content

[0003] The purpose of the present utility model is to provide a high-efficiency gravity balancing device for machine tools to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned objectives, the present utility model provides the following technical solutions: a high-efficiency gravity balancing device for a machine tool, comprising a refueling funnel, a first pipeline, a pressure accumulator, a nitrogen bottle, a connecting accumulator, a second pipeline, a spindle box and a balancing cylinder body, wherein the refueling funnel is connected to the pressure accumulator through the first pipeline, the connecting accumulator is installed between the nitrogen bottle and the pressure accumulator, the balancing cylinder body is installed on the spindle box, and the two ends of the second pipeline are respectively connected to the connecting accumulator and the balancing cylinder body.

[0005] Furthermore, a pressure gauge is installed on the pressure accumulator device, and a pressure detection port is also provided on the pressure accumulator device.

[0006] Furthermore, the pressure accumulator device is provided with an overflow valve and a throttle valve, and an oil drain plug is installed at the bottom of the pressure accumulator device.

[0007] Furthermore, the nitrogen cylinder is provided with a gas filling and discharging port.

[0008] Furthermore, control valves are installed on both the first pipeline and the second pipeline, and the control valves are specifically one-way valves.

[0009] Furthermore, a piston rod for controlling pressure is externally connected to the refueling funnel.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0011] The utility model utilizes an external air pipe to connect the nitrogen bottle to the balancing cylinder to form a closed control system, and cooperates with the balancing device of the machine tool mechanical structure to achieve gravity balance of Z-axis movement. It has the advantages of simple structure, convenient maintenance, low cost, high reliability and safety, and effectively avoids the situation where the motor alarm or damage is caused by the heavy load of Z-axis movement during the operation of the machine tool, and has extremely high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the connection structure of the present utility model.

[0013] In the figure: 1 refueling funnel, 2 first pipeline, 3 pressure accumulator, 4 nitrogen cylinder, 5 connecting accumulator, 6 second pipeline, 7 spindle box, 8 balance cylinder, 9 pressure gauge, 10 pressure detection port, 11 relief valve, 12 throttle valve, 13 oil drain plug, 14 charging and discharging port, 15 control valve, 16 piston rod, 17 balance cylinder bracket. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0015] See also Figure 1 A high-efficiency gravity balancing device for a machine tool includes a refueling funnel 1, a first pipeline 2, a pressure accumulator 3, a nitrogen cylinder 4, a connecting accumulator 5, a second pipeline 6, a spindle box 7 and a balancing cylinder body 8. The refueling funnel 1 is connected to the pressure accumulator 3 through the first pipeline 2. The connecting accumulator 5 is installed between the nitrogen cylinder 4 and the pressure accumulator 3. The balancing cylinder body 8 is installed on the spindle box 7, that is, connected to the Z axis of the spindle box 7, which can support and balance the gravity. At the same time, a balancing cylinder bracket 17 adapted to the balancing cylinder body 8 is also installed on the spindle box 7. The two ends of the second pipeline 6 are respectively connected to the connecting accumulator 5 and the balancing cylinder body 8.

[0016] Specifically, a pressure gauge 9 is installed on the pressure accumulator 3 , and a pressure detection port 10 is also provided on the pressure accumulator 3 . The pressure gauge 9 and the pressure detection port 10 can realize real-time display and detection of the pressure in the pressure accumulator 3 .

[0017] Specifically, the pressure accumulator 3 is further provided with a relief valve 11 and a throttle valve 12 , and an oil drain plug 13 is installed at the bottom of the pressure accumulator 3 .

[0018] Specifically, the nitrogen cylinder 4 is provided with a gas charging and discharging port 14 , through which the nitrogen in the nitrogen cylinder 4 can be charged into and discharged.

[0019] Specifically, a control valve 15 is installed on each of the first pipeline 2 and the second pipeline 6. The control valve 15 is specifically a one-way valve, which can prevent the backflow of oil or gas.

[0020] Specifically, a piston rod 16 for controlling pressure is externally connected to the refueling funnel 1 .

[0021] The utility model utilizes the nitrogen bottle 4 to form an external air pipe to connect with the balance cylinder to form a closed control system, and cooperates with the machine tool mechanical structure balance device to achieve the gravity balance of the Z-axis movement. It has the advantages of simple structure, convenient maintenance, low cost, high reliability and safety, and effectively avoids the situation where the motor alarm or damage is caused by the heavy load of the Z-axis movement during the operation of the machine tool, and has extremely high practical value.

[0022] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency gravity balancing device for a machine tool, comprising a refueling funnel (1), a first pipeline (2), a pressure accumulator (3), a nitrogen bottle (4), a connecting accumulator (5), a second pipeline (6), a spindle box (7) and a balancing cylinder body (8), characterized in that: The refueling funnel (1) is connected to the pressure accumulator (3) via a first pipeline (2); the connecting accumulator (5) is installed between the nitrogen bottle (4) and the pressure accumulator (3); the balancing cylinder body (8) is installed on the spindle box (7); and the two ends of the second pipeline (6) are respectively connected to the connecting accumulator (5) and the balancing cylinder body (8).

2. The high-efficiency gravity balancing device for machine tools according to claim 1, characterized in that: A pressure gauge (9) is installed on the pressure accumulator (3), and a pressure detection port (10) is also provided on the pressure accumulator (3).

3. The high-efficiency gravity balancing device for machine tools according to claim 2, characterized in that: The pressure accumulator (3) is also provided with an overflow valve (11) and a throttle valve (12), and an oil drain plug (13) is installed at the bottom of the pressure accumulator (3).

4. The high-efficiency gravity balancing device for machine tools according to claim 3, characterized in that: The nitrogen bottle (4) is provided with a gas filling and discharging port (14).

5. The high-efficiency gravity balancing device for machine tools according to claim 4, characterized in that: A control valve (15) is installed on both the first pipeline (2) and the second pipeline (6), and the control valve (15) is specifically a one-way valve.

6. The high-efficiency gravity balancing device for machine tools according to claim 5, characterized in that: The refueling funnel (1) is externally connected to a piston rod (16) for controlling pressure.

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