TWI702345B - Preloaded structure of gravity-compensated linear drive device - Google Patents

Abstract

The present invention provides a preloading structure of gravity-compensated linear drive device, which comprises a first main body, a second main body and a preloading structure, wherein the preloading structure comprises a first stand column, a connecting plate and a second stand column, the first stand column is disposed on the first main body, the second stand column is disposed on the second main body, the connecting plate is in contact with the first stand column and the second stand column, and a first chamber and a second chamber are formed inside the second main body. The second stand column is provided with an occlusion block inside the second main body, thereby reducing the installation space requirement of the linear driving device, and facilitating application in a narrow space.

Description

Preload structure of linear drive device with gravity compensation

The present invention relates to a linear drive device; in particular, it refers to an innovative structural type revealer of the preload structure of a linear drive device with gravity compensation.

The linear motor is a linear drive device that converts current into linear kinetic energy. The linear motor has the characteristics of high speed and high acceleration. Its movement mode is direct drive without indirect transmission mechanisms such as gears, racks, ball screws, and couplings. .

The driving application of the Z-axis of the linear motor in the three-dimensional space, for example, the driving application of the vertical feed axis (Z-axis) of the processing machine, the weight of the linear motor itself and the weight of the driven object cause the burden of the linear motor output thrust , And when the linear motor drives the driven object to stop moving at high speed, the effect of gravitational acceleration will cause the problem that the driven object is difficult to accurately locate, and it is easy to cause damage to the processing machine and poor accuracy of the processed object. Linear motor equipped with gravity compensation mechanism.

The conventional linear motor equipped with gravity compensation mechanism mainly connects the linear motor with a pneumatic cylinder of a pneumatic compensation system, and uses the pneumatic cylinder to provide the force supporting the weight of the linear motor and the driven object, and according to the weight and acceleration of the feed axis , Timely change the output of the pneumatic cylinder.

Check that the aforementioned linear motor with gravity compensation mechanism has been practically applied The following problems and shortcomings are still found in the test: the linear motor is connected with the external pneumatic cylinder, which increases the overall volume. When the linear motor is installed in a narrow space, the space limitation makes it difficult to install the pneumatic cylinder. .

The main purpose of the present invention is to provide a preload structure of a linear drive device with gravity compensation. The technical problem to be solved is how to develop a new linear type with less installation space and more ideal practicality. Drive device as the goal to think about innovative breakthroughs.

Based on the foregoing objectives, the technical feature of the present invention to solve the problem is mainly that the preload structure of the linear drive device with gravity compensation includes: a first body, a second body, and a preload structure, wherein the second body Adjacent laterally to the first body, a detent unit is provided between the first body and the second body, so that the first body and the second body move linearly relative to each other;

The preload structure includes at least a first column, a connecting plate and a second column, wherein the first column is erected on the top of the first body, the second column is erected on the second body, and the connection The board is connected to the first and second uprights, and the second upright is extended inside the second body to provide a blocking block, so that a first cavity and a second cavity are formed inside the second body, And the blocking block is arranged between the first chamber and the second chamber, the first chamber and the second chamber are opposite to each other, and the first chamber and the second chamber are respectively opposite to the first chamber The relative linear movement directions of a main body and the second main body are parallel. The first chamber communicates with an air pressure compensation system, so that compressed air flows into or out of the first chamber, and the second chamber is connected to the outside of the second main body. The communication allows air to flow into or out of the second chamber.

The main effect and advantage of the present invention is to reduce the installation space requirement , Which is conducive to application in narrow spaces.

Each figure shows the embodiment of the preload structure of the linear drive device with gravity compensation of the present invention, but these embodiments are for illustrative purposes only and are not limited by this structure in the patent application.

As shown in Figures 1 and 2, the first embodiment includes a first body 10, a second body 20, and a preload structure 30, wherein the second body 20 is laterally adjacent to the first body 10, and A detent unit (not shown) is provided between the first body 10 and the second body 20. The detent unit is used to drive the first body 10 and the second body 20 to move relative to each other, and the detent unit The guiding structure of the unit guides the relative movement path of the first body 10 and the second body 20, and according to the relative linear movement of the first body 10 and the second body 20 on a straight path, the detent unit is essentially Existing technologies familiar to those in the technical field of the invention will not be detailed in detail.

The preload structure 30 includes two first uprights 31, a connecting plate 32 and a first Two uprights 33, wherein each of the first uprights 31 is respectively erected on the top of the first body 10, the second uprights 33 is uprighted on the second body 20, the connecting plate 32 and each of the first uprights 31 and The top ends of the second uprights 33 are connected, so that the second uprights 33 are connected to the first main body 10 through the connecting plate 32 and the first uprights 31; furthermore, the number of the first uprights 31 can be increased as needed However, it is limited to at least one of the first uprights 31. Such quantitative selection changes are easily considered by those skilled in the art based on the technical means of the present invention. The number of the first uprights 31 disclosed in this embodiment is It cannot be interpreted as a limitation of the present invention.

The second upright 33 extends inside the second body 20, and the second upright 33 is also provided with a blocking block 34 inside the second body 20, so that a first chamber 21 and a first chamber 21 and a The second chamber 22, and the blocking block 34 is disposed between the first chamber 21 and the second chamber 22, and separates the first chamber 21 and the second chamber 22, the first chamber 21 and the second chamber 22 are opposite to each other, and the first chamber 21 and the second chamber 22 are respectively parallel to the direction of relative linear movement of the first body 10 and the second body 20, the first chamber 21 is in communication with an air pressure compensation system (not shown), according to which compressed air flows into or out of the first chamber 21, and the second chamber 22 is in communication with the outside of the second body 20, according to which air flows into or out of the The second chamber 22, the first chamber 21 is communicated with the air pressure compensation system through a first air passage 23, according to which compressed air flows into or out of the first chamber 21 through the first air passage 23, the first An air passage 23 is formed in the second body 20, and the first air passage 23 is communicated with the bottom end of the first chamber 21; the air pressure compensation system can be communicated with the first air passage 23 through an air pipe (not shown) The air pressure compensation system is an existing technology familiar to those in the technical field of the present invention, and its specific composition will not be described in detail.

The second chamber 22 communicates with the outside of the second body 20 through a flow channel 24, and the flow channel 24 is formed in the second body 20.

The air pressure compensation system provides compressed air to the first chamber 21 to compress The air forms a force on the blocking block 34 and the bottom end of the first chamber 21, and can provide support for the relative positioning of the first body 10 and the second body 20 in the direction of gravity, so that the first body 10 And the second body 20 will not arbitrarily slide relative to each other in the direction of gravity due to the influence of gravity.

When the first body 10 and the second body 20 are relatively displaced from the position shown in FIG. 2 to the position shown in FIG. 3, the second body 20 is displaced downward relative to the first body 10, and the air pressure compensation The system cooperates to control the compressed gas to flow into the first chamber 21 in an appropriate amount, and the air inside the second chamber 22 flows out through the flow passage 24. The second body 20 can quickly move downward, and the second When the main body 20 is displaced to the required position, the air pressure compensation system stops delivering compressed gas to the first chamber 21 in a timely manner. The internal air pressure and gravity of the first chamber 21 form a balance effect so that the second main body 20 can The displacement is stopped quickly, and the positioning accuracy is improved.

The second embodiment is based on the variation of the first embodiment. The second embodiment has the same structure as the first embodiment, and will not be repeated. As shown in Figure 4, the second embodiment includes a first body 10 and a second body 20. And a preload structure 30. The main difference between the second embodiment and the first embodiment is that the second embodiment lacks the first air passage of the first embodiment, and the second pillar 33 of the preload structure 30 penetrates a second air passage 35. , The first chamber 21 communicates with an air pressure compensation system (not shown) through the second air passage 35, so that the compressed air Flow into or out of the first chamber 21 through the second air passage 35.

The first embodiment and the second embodiment provide different paths for the compressed gas to flow into or out of the first chamber 21. As a result, depending on the installation situation of the linear drive device, whether the first body 10 or the second body 20 is fixed The first or second embodiment is selected to simplify the air pressure compensation system. The gas pipeline communicating with the first chamber 21 is configured.

For example, if the first body 10 is used as a fixed side and the second body 20 is used as a movable side, in the second embodiment, when the second body 20 is displaced and actuated, the air pressure compensation system is connected to the first chamber 21 The gas pipeline is connected to the second air passage 35, and the gas pipeline does not need to be displaced with the second body 20. If the first body 10 is used as the movable side and the second body 20 is used as the fixed side, the embodiment When the first body 10 and the second body 20 are relatively displaced, the gas pipeline system connecting the first chamber 21 of the air pressure compensation system is connected to the first air passage 23, and the gas pipeline does not need to follow The first body 10 is displaced; in this way, the need to reserve the length of the gas pipeline to cooperate with the action of the linear drive device can be reduced, and the complexity of the configuration of the gas pipeline can also be simplified.

The third embodiment is a combination of the first embodiment and the second embodiment. The third embodiment is the same as the first embodiment and the second embodiment. The description will not be repeated. As shown in Figure 5, the third embodiment includes a first The main body 10, a second main body 20, and a preload structure 30. The main difference between the third embodiment and the first and second embodiments is that the second main body 20 forms a first air passage 23, and the preload structure 30 The inside of the second column 33 penetrates a second air passage 35, and the first chamber 21 is respectively communicated with an air pressure compensation system (not shown) through the first air passage 23 and the second air passage 35, according to which the compressed air is respectively The first air passage 23 and the second air passage 35 flow into or out of the first chamber 21, and the air pressure inside the first chamber 21 can be quickly changed, thereby increasing the relative displacement of the first body 10 and the second body 20 The momentary action is instantaneous, and can facilitate the long-distance relative displacement of the first body 10 and the second body 20.

Furthermore, when the third embodiment is applied to various devices, the first air passage 23 or the second air passage 35 can be selected to be connected to the air pressure compensation system, but the first air passage 23 that is not connected to the air pressure compensation system can be selected as needed. Or the second airway 35 is blocked. According to this, the third embodiment can be applied to the first main body 10 as the fixed side and the second main body 20 as the movable side. As the movable side, and the second main body 20 as the fixed side.

The fourth embodiment is based on the variation of the first embodiment. The fourth embodiment has the same structure as the first embodiment, and will not be repeated. As shown in Figure 6, the fourth embodiment includes a first body (not shown), A second body 20 and a preload structure 30. The main difference between the fourth embodiment and the first embodiment is that the preload structure 30 further includes two third chambers 36 and two pressure control valves 37, each of the third chambers The chambers 36 are respectively formed inside the second body 20. The second body 20 respectively forms a third air passage 25 between each of the third chamber 36 and a first chamber 21, and each of the pressure control valves 37 are respectively provided In each of the third chambers 36, the on-off state of the gas flow path between the first chamber 21 and each of the third chambers 36 is controlled, and each of the third chambers 36 is connected to each other through a connecting channel 38. External connectivity.

The number of the third chambers 36 can be increased or decreased as needed, but is limited to at least one of the third chambers 36, and the number of the pressure control valves 37 is matched with the increase or decrease of the number of the third chambers 36.

The fourth embodiment is constituted by each of the third chamber 36 and each of the pressure control valve 37, when the first body and the second body 20 are relatively quickly displaced, the air pressure inside the first chamber 21 rises sharply. When the pressure is higher than the preset pressure value, the air inside the first chamber 21 can flow to each of the third chambers 36 through each of the pressure control valves 37, which can prevent the air pressure compensation system (not shown) from failing to cooperate The relative displacement of the first body and the second body 20 is controlled in time to control an appropriate amount of compressed air to flow out of the first chamber 21 to avoid the kinetic energy of the relative displacement of the first body and the second body 20 from conflicting with the air pressure compensation system , Improve the operating speed and system safety.

With the above-mentioned structural composition and technical characteristics, the present invention has important The preload structure of the force-compensated linear drive device does not need to be connected with a pneumatic cylinder outside the linear drive device. Instead, the first body 10 and the second body 20 constituting the linear drive device are used to set the preload structure 30. The overall volume is significantly reduced compared with the conventional one, and the installation space requirement is reduced, which is conducive to installation in a narrow space. If the linear drive device is installed horizontally, the preload structure 30 can be directly removed without affecting the linear drive device’s performance. In operation, the single linear driving device can meet the driving requirements in different directions by whether or not the preload structure 30 is provided, which is beneficial to the efficiency of manufacturing and assembly.

10: The first subject 20: The second subject 21: The first chamber 22: The second chamber 23: The first airway 24: Runner 25: The third airway 30: Preload structure 31: The first column 32: Connection board 33: The second column 34: occlusion block 35: The second airway 36: The third chamber 37: Pressure control valve 38: Connect channel

Figure 1 is a perspective view of the first embodiment of the present invention. Figure 2 is a schematic side sectional view of the first embodiment of the present invention. Fig. 3 is a schematic side sectional view of the actuation state of the first embodiment of the present invention. Figure 4 is a schematic side sectional view of the second embodiment of the present invention. Figure 5 is a schematic side sectional view of the third embodiment of the present invention. Figure 6 is a schematic cross-sectional view of the fourth embodiment of the present invention.

10: The first subject

20: The second subject

21: The first chamber

22: second chamber

23: The first airway

24: runner

30: Preload structure

31: The first column

32: connecting board

33: The second column

34: occlusion block

Claims (7)

A preload structure of a linear drive device with gravity compensation, including: A first subject; A second body, the second body is laterally adjacent to the first body, and a detent unit is arranged between the first body and the second body, so that the first body and the second body move linearly relative to each other ;as well as A preload structure, the preload structure includes at least a first column, a connecting plate and a second column, wherein the first column is erected on the top of the first body, and the second column is erected on the second The main body, and the connecting plate is connected with the first column and the second column, the second column extends inside the second main body and a blocking block is provided, so that a first chamber and a The second chamber, and the blocking block is arranged between the first chamber and the second chamber, the first chamber and the second chamber are opposite to each other, and the first chamber and the second chamber The chambers are respectively parallel to the direction of relative linear movement of the first body and the second body. The first chamber is in communication with an air pressure compensation system, and compressed air flows into or out of the first chamber, and the second chamber and The second body communicates with the outside, so that air flows into or out of the second chamber. The preload structure of the linear drive device with gravity compensation as described in the first item of the scope of patent application, wherein the first chamber is connected to the air pressure compensation system through a first air passage, so that compressed air passes through the first air passage Into or out of the first chamber. The preload structure of the linear drive device with gravity compensation as described in item 2 of the scope of patent application Structure, wherein the first airway is formed in the second body, and the first airway and the first cavity The bottom of the chamber is connected. The preload structure of the linear drive device with gravity compensation as described in item 1, 2 or 3 of the scope of patent application, wherein a second air passage is formed inside the second column, and the first chamber is connected to the second air passage through the second air passage. The air pressure compensation system is connected, and compressed air flows into or out of the first chamber through the second air passage. The preload structure of a linear drive device with gravity compensation as described in item 1 or 2 of the scope of patent application, wherein the preload structure further includes at least one third chamber and at least one pressure control valve, and the third chamber forms Inside the second body, the second body forms a third air passage between the third chamber and the first chamber, and the pressure control valve is provided in the third chamber, thereby controlling the first chamber The gas flow path between the chamber and the third chamber is in an on-off state. The preload structure of the linear drive device with gravity compensation as described in item 4 of the scope of patent application, wherein the preload structure further includes at least one third chamber and at least one pressure control valve, and the third chamber is formed in the Inside the second body, the second body forms a third air passage between the third chamber and the first chamber, and the pressure control valve is provided in the third chamber, thereby controlling the first chamber and The gas flow path between the third chamber is in an on-off state, and the third chamber communicates with the outside through a connecting channel. According to the preload structure of the linear drive device with gravity compensation described in item 6 of the scope of patent application, the second chamber communicates with the outside of the second body through a flow channel, and the flow channel is formed in the second body.

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