Self-adaptive lead screw supporting mechanism

Abstract

The utility model discloses a self-adaptive lead screw supporting mechanism which comprises a supporting shell, a supporting assembly used for supporting and guiding the supporting shell is arranged below the supporting shell, a connecting block is arranged above the supporting shell, and a transmission lead screw used for driving the supporting assembly to do lifting motion is arranged on the connecting block. A control assembly used for controlling the transmission lead screw to work is arranged on the connecting block. According to the utility model, the position information of the nut seat is read through the numerical control system, when the nut seat is near the screw rod supporting mechanism, the numerical control system sends out an instruction, and the supporting mechanism retracts; after the nut seat leaves the screw rod supporting mechanism for a certain distance, the numerical control system sends out an instruction, and the screw rod supporting mechanism extends out to support the screw rod; the idler wheels on the lead screw supporting mechanism are made of nylon materials, the idler wheels are arranged below the lead screw to play a role in supporting the whole, and the idler wheels can roll along with rotation of the lead screw, so that the idler wheels move forwards in an idler wheel supporting mode, the effect of protecting the lead screw can be achieved, and the lead screw is prevented from being damaged.

Description

Technical Field

[0001] This utility model mainly relates to the field of CNC machine tool technology, specifically an adaptive lead screw support mechanism. Background Technology

[0002] With the increasing demand for large CNC machine tools in the machining industry, the transmission components of large gantry machining centers—ball screws—are also getting longer. Typically, due to their own weight, ball screws exceed 5000mm in length. The amount of screw sag will seriously affect the transmission accuracy, operating speed, and screw accuracy maintenance life. During the machining process, severe screw sag can also cause machine tool vibration.

[0003] Existing ball screws incorporate a hydraulic or spring support mechanism at the bottom of the screw's middle section, with a pressing mechanism added to both sides of the screw nut seat to support the screw. However, the relatively large pressing force creates resistance to the movement of the nut seat, affecting the screw's transmission accuracy and hindering the achievement of high operating speeds and high-precision machining requirements. Utility Model Content

[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing support mechanisms affect the movement and accuracy of the lead screw.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] An adaptive lead screw support mechanism includes a support housing, a support assembly for supporting and guiding the support housing is disposed below the support housing, a connecting block is disposed above the support housing, a transmission lead screw for driving the support assembly to move up and down is disposed on the connecting block, and a control assembly for controlling the operation of the transmission lead screw is disposed on the connecting block.

[0007] Preferably, the control component includes a servo motor, which is mounted on the connecting block, and the output end of the servo motor is provided with a rotating shaft.

[0008] Preferably, the transmission lead screw is mounted on the connecting block, and the transmission lead screw is located inside the support housing.

[0009] Preferably, a drive wheel is provided on the rotating shaft, a driven wheel is provided on the transmission screw, and a transmission belt is sleeved between the drive wheel and the driven wheel.

[0010] Preferably, the support housing is provided with a lifting housing inside, and the lifting housing is threadedly connected to the transmission screw.

[0011] Preferably, the support assembly includes a support base, which is disposed on the lifting housing and has rollers.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: the CNC system reads the position information of the nut seat, and when the nut seat is near the lead screw support mechanism, the CNC system issues a command to retract the support mechanism; when the nut seat moves away from the lead screw support mechanism by a certain distance, the CNC system issues a command to extend the lead screw support mechanism to support the lead screw; the rollers on the lead screw support mechanism are made of nylon material, and the rollers are set below the lead screw to support the whole structure, and the rollers will roll as the lead screw rotates. In this way, the forward movement through the roller support method can protect the lead screw and prevent damage to the lead screw.

[0013] By adjusting the servo motor to torque control mode and adjusting different torque output requirements, the upward support force of this application can be precisely controlled to suit the support requirements of different lead screws; and the internal structure of this application is compact and can meet the installation requirements of most gantry machining centers.

[0014] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0015] Figure 1 This is a frontal three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the bottom three-dimensional structure of this utility model;

[0017] Figure 3 This is a schematic cross-sectional view of the support shell structure of this utility model;

[0018] The diagram is marked as follows:

[0019] 1. Support housing; 2. Lifting housing; 3. Connecting block; 4. Servo motor; 5. Rotating shaft; 6. Drive wheel; 7. Transmission belt; 8. Driven wheel; 9. Transmission screw; 10. Support base; 11. Roller. Detailed Implementation

[0020] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] Please refer to the appendix carefully. Figures 1-3 An adaptive lead screw support mechanism includes a support housing 1, characterized in that: a support component for supporting and guiding the support housing 1 is provided below the support housing 1, a connecting block 3 is provided above the support housing 1, a transmission lead screw 9 for driving the lifting and lowering movement of the support component is provided on the connecting block 3, and a control component for controlling the operation of the transmission lead screw 9 is provided on the connecting block 3.

[0024] The specific operating procedure of this utility is as follows: The CNC system reads the position information of the nut seat. When the nut seat is found to be near the lead screw support mechanism, the CNC system issues a command, and the control component drives the transmission lead screw 9 to rotate. The transmission lead screw 9 drives the support component to retract. When the nut seat moves away from the lead screw support mechanism by a certain distance, the CNC system issues a command, and the control component drives the transmission lead screw 9 to rotate. At this time, the transmission lead screw 9 drives the support component to extend and contact the device. At this time, the support component plays the role of supporting the lead screw, and the support component can also play the role of assisting the movement of the support mechanism when the lead screw rotates and the whole device moves.

[0025] It should be noted that CNC systems in the machine tool field are mature control systems, and their data reading and command sending functions are common functions of CNC systems. This utility model can use a conventional CNC system.

[0026] Please refer to Figures 1-3 The control components include a servo motor 4, which is mounted on a connecting block 3. A rotating shaft 5 is mounted on the output end of the servo motor 4. A transmission screw 9 is mounted on the connecting block 3 and is located inside the support housing 1. A drive wheel 6 is mounted on the rotating shaft 5, and a driven wheel 8 is mounted on the transmission screw 9. A transmission belt 7 is sleeved between the drive wheel 6 and the driven wheel 8. A lifting housing 2 is located inside the support housing 1 and is threaded onto the transmission screw 9.

[0027] The servo motor 4 is started, which drives the rotating shaft 5 to rotate. The rotating shaft 5 drives the drive wheel 6 to rotate. The drive wheel 6 drives the driven wheel 8 to rotate through the transmission belt 7. The driven wheel 8 drives the transmission screw 9 to rotate. The lifting housing 2 is threaded onto the transmission screw 9, and the lifting housing 2 is slidably connected to the inner wall of the support housing 1. The rotation of the transmission screw 9 drives the lifting housing 2 to move up and down. The lifting housing 2 drives the support assembly at the bottom to move up and down.

[0028] Please refer to Figure 2 The support assembly includes a support base 10, which is mounted on the lifting housing 2 and has rollers 11 mounted on it.

[0029] The roller 11 is made of nylon. It contacts the lead screw when it descends and rolls as the lead screw rotates. It does not damage the lead screw. The roller 11 plays a supporting role and also plays an auxiliary role in the overall movement.

[0030] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. An adaptive lead screw support mechanism, comprising a support housing (1), characterized in that: A support assembly for supporting and guiding the support housing (1) is provided below the support housing (1), a connecting block (3) is provided above the support housing (1), a transmission screw (9) for driving the support assembly to move up and down is provided on the connecting block (3), and a control assembly for controlling the operation of the transmission screw (9) is provided on the connecting block (3). The control component includes a servo motor (4), which is mounted on the connecting block (3), and the output end of the servo motor (4) is provided with a rotating shaft (5). The rotating shaft (5) is provided with a driving wheel (6), the transmission screw (9) is provided with a driven wheel (8), and a transmission belt (7) is sleeved between the driving wheel (6) and the driven wheel (8).

2. The adaptive lead screw support mechanism according to claim 1, characterized in that: The transmission screw (9) is mounted on the connecting block (3) and is located inside the support housing (1).

3. The adaptive lead screw support mechanism according to claim 1, characterized in that: The support housing (1) is provided with a lifting housing (2) inside, and the lifting housing (2) is threaded onto the transmission screw (9).

4. The adaptive lead screw support mechanism according to claim 1, characterized in that: The support assembly includes a support base (10), which is disposed on the lifting housing (2), and rollers (11) are provided on the support base (10).

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