T-shaped beam structure of portable gantry milling machine

Abstract

The utility model discloses a movable portable gantry milling machine's T shape crossbeam structure belongs to gantry milling machine technical field, including the body, T shape piece, screw rod and transverse slide plate use linear guide rail, the top wall fixed mounting of body has upside linear guide rail, its inboard wall middle part also has the fixed mounting of inboard linear guide rail, T shape piece has horizontal section and vertical section, its horizontal section is connected with upside linear guide rail sliding, and vertical section is connected with inboard linear guide rail sliding, and is connected with screw rod through screw structure. The utility model discloses through the inboard linear guide rail of adding in the body inboard, with upside linear guide rail cooperation to the upper and lower two ends of T shape piece form double support guide, solved the insufficient rigidity, the problem of unstable operation of single support structure in the prior art, has improved the support intensity and the anti -overturning ability of crossbeam structure significantly, has increased the cutting depth of cut while, effectively ensured the machining precision and processing efficiency of equipment.

Description

Technical Field

[0001] This utility model relates to the field of gantry milling machine technology, and in particular to a T-shaped crossbeam structure for a movable and convenient gantry milling machine. Background Technology

[0002] Gantry milling machines are widely used for machining large workpieces. The crossbeam, as a key component that supports and guides the milling mechanism's reciprocating motion along the guide rails, directly determines the overall machining quality through its stability and precision. In recent years, to meet the needs of on-site maintenance and miniaturized operations, mobile and convenient gantry milling machines have gradually developed.

[0003] In existing designs of portable gantry milling machines, to simplify the structure and reduce weight, the guide structure of its crossbeam typically adopts a single-support guide method. For example, the transverse portion of the T-shaped motion slider rests on the top wall of the machine bed and is guided by a set of linear guides mounted on the top wall. This design is relatively simple and easy to implement.

[0004] However, this guide structure, relying solely on a single point of support at the top, inherently suffers from stability defects. When the milling mechanism performs cutting operations, the cutting force acts on the T-shaped slider, generating a torque that attempts to overturn or deflect it. Because only the upper guide rail provides constraint, the lever arm resisting the overturning torque is very short, resulting in insufficient rigidity of the entire beam structure. This instability is particularly pronounced during deep cutting operations, easily inducing vibration, which severely affects machining accuracy and surface quality, and limits the improvement of machining efficiency.

[0005] Therefore, this utility model proposes a T-shaped beam structure for a movable and convenient gantry milling machine to address the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems of insufficient structural rigidity and poor operational stability caused by the use of only a single upper support guide in the T-beam structure of a portable gantry milling machine in the prior art, this utility model aims to provide a T-beam structure for a portable gantry milling machine with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a T-shaped beam structure for a movable and convenient gantry milling machine, including a bed, an upper linear guide rail installed on the top wall of the bed, a lead screw installed on the inner side of the bed, and a T-shaped block; the T-shaped block has a horizontal part and a vertical part, the bottom surface of its horizontal part is slidably connected to the upper linear guide rail through a first slider, and the outer wall of the T-shaped block is also fixedly installed with a horizontal sliding plate linear guide rail.

[0008] The structure also includes an inner linear guide rail that is fixedly installed in the middle of the inner wall of the bed.

[0009] The vertical part of the T-shaped block is slidably connected to the inner linear guide rail via a second slider, while the T-shaped block is connected to the lead screw via a threaded structure. With this combination, the guiding directions of the upper linear guide rail and the inner linear guide rail are parallel to each other, and they respectively support and guide the upper end of the horizontal part and the lower end of the vertical part of the T-shaped block, forming a stable double support and guiding structure.

[0010] Preferably, the vertical portion of the T-block has a through threaded hole, and the lead screw passes through the threaded hole and is threaded to the inner wall of the hole. This symmetrical driving method, which precisely applies the driving force to the center of the T-block, can effectively prevent the T-block from generating an off-center load during movement.

[0011] Preferably, the two ends of the lead screw are rotatably mounted on the machine bed via bearing seats, and the axis of the lead screw is parallel to the guiding direction of the upper and inner linear guides, thereby ensuring the smoothness and precision of the entire transmission process.

[0012] Preferably, in terms of spatial layout, the horizontal part of the T-shaped block is located at the upper part of the bed frame, while its vertical part extends into the internal space defined by the inner wall of the bed frame. The design achieves a compact overall structure and a reasonable spatial configuration.

[0013] Preferably, the number of linear guide rails for the transverse sliding plate fixed on the outer wall of the T-block is two or more, and they are evenly distributed along the height direction of the T-block. This layout provides a more stable and evenly distributed support foundation for the transverse sliding plate and milling mechanism to be installed laterally.

[0014] Preferably, as a specific structural implementation, the guide surface of the upper linear guide is set horizontally, mainly to bear the weight of the T-block itself and the processing load, while the guide surface of the inner linear guide is set vertically, mainly to resist the horizontal cutting force and overturning moment generated during milling. The two work together in different directions, which greatly enhances the running stability of the T-block.

[0015] Preferably, in order to ensure sufficient structural strength and rigidity to resist impacts and vibrations during processing, the T-block is made of metal casting or welded from multiple metal plates.

[0016] Preferably, similarly, as the foundation of the entire structure, the bed is also made of metal casting or welded profiles, and has anchor bolt holes at its bottom to facilitate the stable installation of the entire equipment on the work platform or the ground.

[0017] This utility model has the following beneficial effects: 1. This utility model, by setting an upper side linear guide rail on the top wall of the bed and adding an inner side linear guide rail in the middle of the inner side of the bed, forms a double support and guide structure for the upper and lower ends of the T-shaped block. This solves the problem of insufficient rigidity and poor stability of the crossbeam structure caused by single support and guidance in the prior art, and achieves the technical effect of significantly improving the support strength and anti-overturning ability of the T-shaped block, and ensuring its high-precision and stable operation. 2. This utility model, by adopting a high-rigidity double-support guide structure, effectively suppresses vibration and deformation caused by cutting force during milling, and solves the problem of low processing efficiency caused by insufficient structural stability limiting the cutting depth in the existing technology. It achieves the technical effect of significantly increasing the milling depth of cut while ensuring processing accuracy, thereby greatly improving the overall processing efficiency of the equipment. 3. This utility model solves the problem of uneven load and unstable feed motion caused by unilateral drive in the prior art by symmetrically threading T-blocks onto the drive screw. It achieves a more balanced application of driving force and a more stable and reliable feed process, thereby further ensuring the repeatability of the equipment and the final processing quality. Attached Figure Description

[0018] Figure 1 This is a perspective view of the T-shaped beam structure of a portable gantry milling machine proposed in this utility model; Figure 2 This is a front view of the T-shaped beam structure of a portable gantry milling machine proposed in this utility model; Figure 3 This is a side view of the T-shaped beam structure of a portable gantry milling machine proposed in this utility model; Figure 4 This is a partial structural breakdown diagram of the T-shaped beam structure of a portable gantry milling machine proposed in this utility model.

[0019] Legend: 1. Bed; 2. T-block; 3. Linear guide rail for transverse slide; 4. Upper side linear guide rail; 5. Inner side linear guide rail; 6. Lead screw. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example: Please refer to Figures 1 to 4This utility model provides a T-shaped crossbeam structure for a portable gantry milling machine, which aims to solve the problem that the existing portable gantry milling machine crossbeam structure has insufficient rigidity and stability due to single-support guidance, thus limiting the machining accuracy and efficiency.

[0022] like Figure 1 and Figure 2 As shown, a T-beam structure of a portable gantry milling machine includes a bed 1 and a T-block 2 slidably connected to the bed 1. The bed 1 provides the mounting foundation and guide path for the entire structure, while the T-block 2 serves as a moving component, supporting the subsequent milling mechanism and achieving precise reciprocating motion. The bed 1 has a top wall and opposing inner side walls. An upper side linear guide rail 4 is fixedly installed on the top wall of the bed 1, and a lead screw 6 for driving is installed on the inner side of the bed 1. The T-block 2 consists of an integrally extended horizontal portion and a vertical portion. The bottom surface of its horizontal portion is slidably connected to the upper side linear guide rail 4 via a first slider. Horizontal slide plate linear guide rails 3 are fixedly installed on both the front and rear sides of its outer wall for mounting the horizontal slide plate. Regarding the milling mechanism, the innovation of this solution lies in the additional fixed installation of an inner side linear guide 5 at the middle position of the inner side wall of the bed 1. The vertical part of the T-block 2 facing the inner side wall is slidably connected to this inner side linear guide 5 through a second slider. At the same time, the T-block 2 is threadedly connected to the lead screw 6 through its own threaded structure. The guiding direction of the upper side linear guide 4 is parallel to the guiding direction of the inner side linear guide 5. Through this structural design, the upper side linear guide 4 provides support and guidance for the upper end of the horizontal part of the T-block 2, while the inner side linear guide 5 provides support and guidance for the lower end of the vertical part of the T-block 2. Thus, together, they form a stable and reliable double support and sliding guide for the upper and lower ends of the T-block 2.

[0023] The inner linear guide 5 is fixedly installed in the middle of the inner wall of the bed 1. Its guide surface is vertically set, providing a precise guiding reference for the lower movement of the T-block 2. Correspondingly, the vertical part of the T-block 2 has a second slider fixedly installed on the side facing the inner wall. In the assembled state, the second slider slides on the inner linear guide 5. This combination of the upper sliding support structure formed by the upper linear guide 4 and the first slider, and the lower sliding support structure formed by the inner linear guide 5 and the second slider, forms two support points, which greatly lengthens the lever arm that constrains the movement of the T-block 2. When it is subjected to the cutting force from transverse milling, it can effectively resist the overturning moment, thereby ensuring the high stability and anti-deflection ability of the T-block 2 during high-speed reciprocating motion.

[0024] Regarding the lead screw 6 that drives the T-block 2, its two ends are rotatably mounted on the bed 1 through bearing seats. The axis of the lead screw 6 is parallel to the guiding direction of the upper side linear guide 4 and the inner side linear guide 5 to ensure smooth movement. Correspondingly, a through threaded hole is provided on the vertical part of the T-block 2. The lead screw 6 passes through the threaded hole and is threadedly connected to its inner wall. When the lead screw 6 rotates, it can drive the T-block 2 to move precisely along the path formed by the upper side linear guide 4 and the inner side linear guide 5 through the threaded pair transmission.

[0025] As a preferred embodiment, in order to achieve more stable and unbiased drive, a through threaded hole is provided on the vertical part of the T-block 2. The lead screw 6 passes directly through the threaded hole during installation and forms a threaded connection with the inner wall of the threaded hole. Through this symmetrical drive method that precisely applies the driving force to the central axis position of the T-block 2, the deflection or swaying of the T-block 2 due to uneven force during start-up, stop or speed change is effectively avoided.

[0026] As another preferred embodiment, both ends of the lead screw 6 are rotatably mounted and fixed on the bed 1 through bearing seats, and the central axis of the lead screw 6 is parallel in space to the guiding direction of the upper side linear guide 4 and the inner side linear guide 5. This precise parallel layout is a prerequisite for ensuring that the T-block 2 can run smoothly and with low resistance throughout the entire stroke.

[0027] As a specific spatial layout scheme, the horizontal part of the T-shaped block 2 is located in the upper space of the bed 1, providing an open platform for the horizontal sliding plate linear guide rail 3 installed on it, while the vertical part of the T-shaped block 2 extends downward and is accommodated in the internal space defined by the inner wall of the bed 1, thereby achieving cooperation with the inner side linear guide rail 5.

[0028] As an implementation method to enhance lateral load-bearing capacity, the number of linear guide rails 3 for lateral sliding plates fixedly installed on the front and rear sides of the outer wall of the T-block 2 can be two or more, and they are equidistantly distributed along the height direction of the T-block 2. This multi-point, equidistant distribution method provides a more stable support foundation for the lateral sliding plates installed subsequently.

[0029] As a further optimization of the dual support structure, the guide surface of the upper linear guide 4 is set horizontally, mainly to bear the weight of the T-block 2 and the load, while the guide surface of the inner linear guide 5 is set vertically, mainly to resist the horizontal component force and overturning moment generated during milling. The orthogonal layout of the two in space works together to form an extremely stable constraint system.

[0030] To ensure that key components have sufficient structural rigidity to resist deformation during processing, the T-block 2 can be manufactured using metal casting or by welding multiple metal plates. Similarly, the bed 1, which serves as the base, can also be manufactured using metal casting or by welding profiles, and has anchor bolt holes at its bottom for securely mounting the entire equipment on the ground or workbench.

[0031] Working principle: When the external drive motor drives the lead screw 6 to rotate, the lead screw 6 is connected to the inner wall of the threaded hole that passes through the vertical part of the T-block 2 through its thread. The rotational motion of the lead screw 6 is converted into the linear reciprocating motion of the T-block 2, thereby driving the T-block 2 to move precisely along the length of the bed 1. During the movement of T-block 2, its trajectory is precisely constrained by two sets of guide rail systems. Specifically, the first slider on the bottom surface of the horizontal part of T-block 2 always slides along the upper side linear guide rail 4 fixed to the top wall of bed 1, providing stable support and horizontal guidance for the upper end of T-block 2. At the same time, the second slider on the side of the vertical part of T-block 2 always slides along the inner side linear guide rail 5 fixed to the middle of the inner side wall of bed 1, providing stable support and lateral guidance for the lower end of T-block 2. The dual support and guidance structure is formed by the coordinated operation of the upper side linear guide rail 4 and the inner side linear guide rail 5, which simultaneously support and guide the upper and lower ends of the T-block 2. This structure greatly enhances the overall rigidity of the T-block 2, effectively resists the overturning moment and lateral force generated during milling, and ensures that the T-block 2 can maintain stable operation even under large cutting volume. Finally, the transverse slide linear guide rail 3 fixed to the outer wall of the T-block 2 provides a high-precision motion reference for the transverse slide and the milling mechanism as the T-block 2 moves stably.

Claims

1. A T-beam structure for a portable gantry milling machine, comprising: A bed (1) has a top wall and opposing inner side walls. A linear guide rail (4) is fixedly installed on the top wall of the bed (1). A lead screw (6) is installed on the inner side of the bed (1). A T-shaped block (2) includes a horizontal part and a vertical part integrally extended from its top. The bottom surface of the horizontal part of the T-shaped block (2) is slidably connected to the linear guide rail (4) on the upper side through a first slider. A horizontal sliding plate is fixedly installed on both the front and rear sides of the outer wall of the T-shaped block (2). The linear guide (3) is characterized in that an inner side linear guide (5) is fixedly installed in the middle of the inner side wall of the bed (1), and the vertical part of the T-shaped block (2) facing the inner side wall is slidably connected to the inner side linear guide (5) by a second slider. The T-shaped block (2) is threadedly connected to the lead screw (6), and the upper side linear guide (4) and the inner side linear guide (5) are parallel to each other, forming a double support and sliding guide for the upper and lower ends of the T-shaped block (2).

2. The T-beam structure of a portable gantry milling machine according to claim 1, characterized in that, The vertical portion of the T-block (2) is provided with a through threaded hole, and the lead screw (6) passes through the threaded hole and is threadedly connected to the inner wall of the threaded hole to achieve symmetrical drive and avoid off-center load.

3. The T-beam structure of a portable gantry milling machine according to claim 1, characterized in that, The two ends of the lead screw (6) are rotatably mounted on the bed (1) through bearing seats, and the axis of the lead screw (6) is parallel to the guiding direction of the upper side linear guide (4) and the inner side linear guide (5).

4. The T-beam structure of a portable gantry milling machine according to claim 1, characterized in that, The horizontal portion of the T-shaped block (2) is located entirely in the upper space of the bed (1), while the vertical portion of the T-shaped block (2) extends into the internal space defined by the inner wall of the bed (1).

5. The T-beam structure of a portable gantry milling machine according to claim 1, characterized in that, The number of transverse sliding plate linear guide rails (3) set on the front and rear sides of the outer wall of the T-shaped block (2) is two or more, and they are equidistantly distributed along the height direction of the T-shaped block (2).

6. The T-beam structure of a portable gantry milling machine according to claim 1, characterized in that, The upper side linear guide (4) has a horizontal guide surface, and the inner side linear guide (5) has a vertical guide surface. Together, they resist the overturning torque of the T-block (2) during movement and milling.

7. The T-beam structure of a portable gantry milling machine according to claim 1, characterized in that, The T-shaped block (2) is a metal casting or is made of multiple metal plates welded together to ensure its structural rigidity.

8. The T-beam structure of a portable gantry milling machine according to claim 1 or 7, characterized in that, The bed (1) is also a metal casting or welded from profiles, and has anchor bolt holes at its bottom.

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