Double screw center drive structure of box-in-box structure

Abstract

The utility model relates to a double lead screw center drive structure of box-in-box structure relates to screw rod drive design technical field, including support box, support box inside fixed mounting has the screw rod, and the cooperation is provided with the mobile machine case on the screw rod, is provided with the adjusting mechanism for adjusting the mobile precision in the mobile machine case. The present application changes the eccentric force problem caused by the traditional single side drive through adopting the double lead screw and arranging in the center drive mode of mobile machine case. The symmetrical center drive structure makes the driving force act in the center of the moving part, effectively reduces the deformation, vibration and overturning moment of the slide saddle (namely mobile machine case) in the high speed or heavy load movement, thereby greatly improves the rigidity and dynamic stability of the whole motion system.

Description

Technical Field

[0001] This utility model relates to the field of lead screw drive design technology, specifically a double lead screw center drive structure with a box-in-box structure. Background Technology

[0002] CNC machine tools are the main equipment used in the field of metal cutting. With the development and progress of science and technology, large parts are becoming more and more common in various fields in recent years, and gantry machine tools are being used more and more. Because the gantry beam and slide saddle are basically in a structure where the slide saddle is on one side of the beam, the slide saddle deforms a lot. At present, many manufacturers adopt a box-in-box structure. Due to the limitations of the box-in-box structure, the lead screw cannot be arranged in the center position of the slide saddle. The single lead screw drive is often driven on one side of the slide saddle, which often results in poor dynamic performance and often fails to meet customer requirements. Utility Model Content

[0003] The technical problem solved by this utility model is to solve the problem of unstable movement of the sliding saddle in the prior art.

[0004] This utility model can be achieved through the following technical solution: a double lead screw center drive structure with a box-in-box structure, including a support box, a lead screw fixedly installed inside the support box, a movable housing cooperating on the lead screw, and an adjustment mechanism for adjusting the movement accuracy inside the movable housing.

[0005] A further technical improvement of this utility model is that the adjustment mechanism includes two sets of connecting bases, which are threadedly connected to the lead screw, and the connecting bases are rotatably installed inside the mobile housing.

[0006] A further technical improvement of this utility model is that: an external connecting gear is fixed on the side of the connecting base, and a connecting gear is rotatably arranged inside the mobile housing. The connecting gear is connected to the output end of the power component through an adjustment component.

[0007] A further technical improvement of this utility model is that the adjustment component includes a switching gear, which is meshed with the output end of the connecting gear and the power component respectively, and the switching gear is rotatably mounted on the output end of the pushing cylinder.

[0008] A further technical improvement of this utility model is that the power component includes a first motor and a second motor, which are respectively installed on both sides of the mobile chassis. The first motor is driven by a first gear, and the second motor is driven by a second gear.

[0009] A further technical improvement of this utility model is that a side sliding base is fixed on the side of the mobile chassis, and the side sliding base and the supporting box are slidably connected.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. This application addresses the eccentricity problem caused by traditional single-sided drive by employing a dual-screw drive system centrally located within the moving chassis. This symmetrical central drive structure directs the driving force to the center of the moving components, effectively reducing deformation, vibration, and overturning moment of the saddle (i.e., the moving chassis) during high-speed or heavy-load motion, thereby significantly improving the rigidity and dynamic stability of the entire motion system.

[0011] 2. This application innovatively integrates two independent drive motors (a first motor and a second motor) and a switchable transmission mechanism (controlled by a cylinder to switch gears). When the accuracy of one drive system (such as a connecting base connected to a lead screw) decreases due to long-term use, the system can automatically or manually switch to another backup drive system to continue working. This not only ensures the continuity and reliability of the machining process and realizes "online" accuracy compensation and maintenance, but also extends the service life of the equipment and ensures long-term machining accuracy.

[0012] 3. The entire drive structure of this application is integrated inside a "box-within-a-box," resulting in a reasonable and compact layout that saves space. Through modular design (such as a detachable connecting base), components requiring replacement or maintenance with poor precision can be easily disassembled and replaced, simplifying the maintenance process and improving the maintainability of the equipment. The sliding engagement between the side sliding base and the supporting box further ensures guiding stability during movement. Attached Figure Description

[0013] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram showing the position of the movable component of this utility model; Figure 2 For the present utility model Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a schematic diagram of the adjustment component of this utility model; Figure 4 This is a schematic diagram of the position of the switching gear of this utility model.

[0015] In the diagram: 1. Lead screw; 2. Moving component; 21. Moving housing; 22. First gear; 23. First motor; 24. Top base; 25. Second gear; 26. Second motor; 27. Side sliding base; 28. T-shaped slide; 29. ​​Mounting base; 210. Pushing base; 211. Pushing cylinder; 212. Switching gear; 213. Connecting gear; 214. External connecting gear; 215. Connecting base; 216. Support housing. Detailed Implementation

[0016] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0017] Please see Figure 1-4 As shown, a box-within-a-box structure with a dual lead screw center drive includes a lead screw 1 fixedly installed inside a support box 216. The lead screw 1 is directly fixed inside the support box 216, and a movable component 2 is threadedly connected to the lead screw 1. The connection between the movable component 2 and the lead screw 1 is used to enable the movable component 2 to slide inside the support box 216. Therefore, the movable component 2 and the support box 216 are slidably connected. During this process, the lead screw 1 is located at the center position of the movable component 2, which can ensure the stability of the movement of the movable component 2.

[0018] As a further embodiment of this application, the moving component 2 includes a moving housing 21, wherein the lead screw 1 passes through the moving housing 21, and a side sliding base 27 is fixed on the side of the moving housing 21. The side sliding base 27 is provided with a T-shaped slide groove 28, which is slidably connected to the support housing 216 to realize the lateral movement of the moving housing 21. The moving housing 21 is installed at the output end of the equipment to provide a basis for linear movement of various equipment, thereby enabling the linear movement of the moving housing 21. By using multiple sets of side sliding bases 27, the stability of the moving housing 21 during linear movement can be maintained.

[0019] Furthermore, a first motor 23 and a second motor 26 are fixedly installed on both sides of the mobile housing 21, respectively. The first motor 23 and the second motor 26 drive the first gear 22 and the second gear 25 respectively. The first gear 22 and the second gear 25 are rotatably installed inside the mobile housing 21. The first gear 22 and the second gear 25 cooperate with the lead screw 1 through the connecting component. The connecting component controls the first motor 23 or the second motor 26 to control the rotation of the first gear 22 or the second gear 25, thereby cooperating with the lead screw 1 so that the mobile housing 21 can move linearly inside the support housing 216.

[0020] Furthermore, a top base 24 is fixedly installed on the top of the mobile housing 21, and a connecting base 215 is rotatably installed inside the mobile housing 21. This connecting base 215 is threadedly connected to the lead screw 1, and an external connecting gear 214 is fixedly installed on the side of the connecting base 215. A connecting gear 213 is rotatably installed inside the mobile housing 21, meshing with the external connecting gear 214. Simultaneously, the connecting gear 213 meshes with the first gear 22 via a switching gear 212, and another set of connecting gears 213 meshes with the second gear 25 via the switching gear 212. Adjacent connecting bases 215 are fixedly connected by bolts. Therefore, in use, the first motor 23 drives the first gear 22, and the first gear... Under the meshing action of the switching gear 212 and the switching gear 212, the connecting gear 213 and the external connecting gear 214 are driven to rotate, so that the connecting base 215 rotates on the lead screw 1, thereby causing the moving housing 21 to move linearly, so as to realize the linear movement of the moving housing 21. When the movement accuracy of the connecting base 215 is not high, the switching gear 212 is switched to mesh with the second gear 25 through the switching action of the switching gear 212. At this time, the connecting base 215 with low accuracy and the connecting base with high accuracy are separated, and the connecting base 215 with low accuracy is directly removed. At this time, the switching gear 212 drives the adjacent connecting gear 213 and the external connecting gear 214 to rotate, so that the movement accuracy is high and precision production is guaranteed.

[0021] Furthermore, in order to achieve the position movement of the switching gear 212, the switching gear 212 is rotatably mounted on the push base 210, which is fixedly mounted on the output end of the push cylinder 211, which is fixedly mounted on the mobile housing 21. In use, the start of the push cylinder 211 controls the start of the push base 210, thereby controlling the lateral position of the mounting base 29, thus controlling the position of the switching gear 212.

[0022] In use, this invention utilizes a first motor 23 to drive a first gear 22. The meshing of the first gear 22 and the switching gear 212 drives the rotation of the connecting gear 213 and the external connecting gear 214, causing the connecting base 215 to rotate on the lead screw 1. This results in linear movement of the moving housing 21, achieving linear movement of the moving housing 21. When the movement accuracy of the connecting base 215 is low, the switching gear 212 engages with the second gear 25, separating the low-accuracy connecting base 215 from the high-accuracy connecting base. The low-accuracy connecting base 215 is then directly removed. The switching gear 212 then drives the adjacent connecting gear 213 and the external connecting gear 214, resulting in higher movement accuracy and ensuring precision production. To achieve the positional movement of the switching gear 212, the starting of the push cylinder 211 controls the starting of the push base 210, thereby controlling the lateral position of the mounting base 29 and thus controlling the position of the switching gear 212.

[0023] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A box-within-a-box structure with a dual lead screw center drive, comprising a supporting box (216), characterized in that: A lead screw (1) is fixedly installed inside the support box (216), and a movable housing (21) is provided on the lead screw (1). An adjustment mechanism for adjusting the movement accuracy is provided inside the movable housing (21).

2. The double-screw center drive structure of the box-in-box structure according to claim 1, characterized in that, The adjustment mechanism includes two sets of connecting bases (215), which are threadedly connected to the lead screw (1), and the connecting bases (215) are rotatably installed inside the mobile housing (21).

3. The double-screw center drive structure of the box-in-box structure according to claim 2, characterized in that, An external connecting gear (214) is fixed to the side of the connecting base (215), and a connecting gear (213) is rotatably provided inside the mobile housing (21). The connecting gear (213) is connected to the output end of the power component through an adjustment component.

4. The dual-screw center drive structure of the box-in-box structure according to claim 3, characterized in that, The adjustment assembly includes a switching gear (212), which meshes with the connecting gear (213) and the output end of the power assembly respectively. The switching gear (212) is rotatably mounted on the output end of the push cylinder (211).

5. The double-screw center drive structure of the box-in-box structure according to claim 3, characterized in that, The power assembly includes a first motor (23) and a second motor (26). The first motor (23) and the second motor (26) are respectively installed on both sides of the mobile housing (21). The first motor (23) is driven by a first gear (22), and the second motor (26) is driven by a second gear (25).

6. The dual-screw center drive structure of the box-in-box structure according to claim 1, characterized in that, The mobile chassis (21) is fixed with a side sliding base (27) on its side, and the side sliding base (27) and the support box (216) are slidably connected.

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