A large-span linear moving gantry structure

Abstract

The utility model relates to a kind of for large-span linear movement type gantry structure, belong to mechanical transmission technical field, including crossbeam, mobile support, elastic drive mechanism, driven mechanism and guide rail;The both ends of crossbeam are equipped with mobile support support crossbeam, the side below mobile support is equipped with elastic drive mechanism, the other side is equipped with driven mechanism, and elastic drive mechanism and driven mechanism are set on guide rail;Elastic drive mechanism and driven mechanism support mobile support and crossbeam reciprocating linear motion along guide rail, this gantry structure is stable, load reliable, installation flexible and the advantages such as easy maintenance, applicable to the scene of large-span linear movement type gantry.

Description

Technical Field

[0001] This utility model relates to a gantry structure, specifically a gantry structure for large-span linear movement, and belongs to the field of mechanical transmission technology. Background Technology

[0002] In the operation of large-scale inspection, handling, and processing equipment, long working strokes are often required, and gantry structures are an important component to solve this problem. They typically consist of a crossbeam, a traveling mechanism, and guide rails. The crossbeam spans between two uprights, the lower ends of which are connected to the traveling mechanism. The traveling mechanism moves along the guide rails, thus realizing the reciprocating linear motion of the entire gantry frame. Mounting interfaces can be installed on the crossbeam to fix inspection devices, processing tools, or other actuators to meet operational needs under various working conditions.

[0003] However, existing gantry structures still have certain limitations in use. First, the traveling mechanism and guide rails are prone to inconsistent movement during long-span operation, further exacerbating safety hazards and efficiency losses during equipment operation. Second, the gantry is prone to local fatigue during long-term operation, affecting the stability and accuracy of the overall structure and leading to a shortened lifespan. Third, if the material and processing precision of the guide rails do not meet ideal standards, it will also accelerate rail wear, further reducing the overall performance of the equipment.

[0004] The existence of these problems makes it difficult for existing technologies to fully meet the needs of high-precision and high-efficiency operations. Therefore, there is an urgent need for a large-span linear moving gantry structure to overcome the above-mentioned defects. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a gantry structure for large-span linear movement.

[0006] To solve the above technical problems, this utility model provides a gantry structure for large-span linear movement, including a crossbeam, a movable support, an elastic drive mechanism, a driven mechanism, and a guide rail. The crossbeam is supported by movable supports at both ends. A flexible drive mechanism is provided on one side below the movable support, and a driven mechanism is provided on the other side. The flexible drive mechanism and the driven mechanism are mounted on the guide rail. The flexible drive mechanism and driven mechanism support the movable support and crossbeam to reciprocate linearly along the guide rail.

[0007] The further defined technical solution of this utility model is: Furthermore, in the aforementioned gantry structure for long-span linear movement, the elastic drive mechanism includes a drive roller seat, a drive roller, a drive shaft, a drive gear, a rack, a motor seat, and a drive motor. The drive roller seat is located at the lower end of the movable support. The drive roller seat contains a drive roller that is rotatably mounted via a drive shaft and a bracket. The bottom end of the drive roller extends out of the drive roller seat and is rolled on the guide rail. One side of the drive roller seat extends outward to form a connecting plate. The motor base is connected to one side of the drive roller base via a connecting shaft. A drive motor is vertically installed inside the motor base. A drive gear is installed on the output shaft end of the drive motor. The drive gear meshes with a rack located on one side of the guide rail. A connecting plate is spaced apart outside the motor base. The outer wall of the motor base and the connecting plate are connected by a bolt guide rod. The bolt guide rod is horizontally set. One end of the bolt guide rod is threaded to the outer wall of the motor base, and the other end penetrates the connecting plate and is fitted with an elastic element. One end of the elastic element abuts against the connecting plate, and the other end abuts against a limiting block fixed on the bolt guide rod, so that there is an elastic force between the motor base and the connecting plate.

[0008] Technically, the elastic drive mechanism of this utility model is supported by an active roller and driven by a drive motor. The two are detachably connected, which facilitates installation, disassembly, replacement and maintenance. At the same time, there is an elastic force between the motor base and the connecting plate, which makes the drive gear mesh with the rack and pinion to have an elastic opening and closing function.

[0009] In the aforementioned gantry structure for long-span linear movement, a rubber buffer pad is also provided on the side of the motor base away from the drive roller base.

[0010] Technically, the rubber buffer pads on the motor base can prevent collisions and reduce shocks when the gantry reaches its limit travel.

[0011] In the aforementioned gantry structure for long-span linear movement, the lower end of the drive roller seat is provided with a drive side wheel assembly. The drive side wheels in the drive side wheel assembly are symmetrically arranged on both sides of the drive roller. The outer wall of the drive side wheel abuts against the guide rail, and the drive side wheel assembly rolls along both sides of the guide rail.

[0012] Technically, this utility model has a drive side wheel assembly at the lower end of the drive roller seat, and drive side wheels are symmetrically arranged on both sides of the active roller. It moves along both sides of the guide rail, effectively preventing the gantry from deviating when it moves and ensuring that the gantry's movement is guided.

[0013] In the aforementioned gantry structure for long-span linear movement, the upper surface of the guide rail is the rail surface, and the two sides of the guide rail are the rail webs. A rack is fixedly installed on one side of the guide rail web along the length of the guide rail, and the rack meshes with the drive gear.

[0014] Preferably, the guide rail adopts a linear rail or a toothed rail structure to improve the stability and guiding accuracy of the elastic drive mechanism and the driven mechanism.

[0015] In the aforementioned gantry structure for long-span linear movement, the driven mechanism includes a driven roller seat fixed to the lower end of the moving support. A rolling driven roller is installed in the driven roller seat through a driven shaft and a bracket. The bottom end of the driven roller is rolled on the guide rail.

[0016] In the aforementioned gantry structure for long-span linear movement, a rubber buffer pad is provided on the side of the driven roller seat away from the driving roller seat.

[0017] The technical effect is that the rubber buffer pad on the driven roller seat can play a role in preventing collisions and reducing shocks when the gantry reaches its limit travel.

[0018] In the aforementioned gantry structure for long-span linear movement, the lower end of the driven roller seat is provided with a driven side wheel assembly. The driven side wheels in the driven side wheel assembly are symmetrically arranged on both sides of the driving roller. The outer wall of the driven side wheel abuts against the guide rail, and the driven side wheel assembly rolls along both sides of the guide rail.

[0019] In terms of technical effect, this utility model has a driven side wheel set at the lower end of the driven roller seat, just like the driven side wheel set at the lower end of the driven roller seat. The driven side wheel moves along both sides of the guide rail, which effectively prevents the gantry from deviating when it moves and ensures that the gantry moves with guidance.

[0020] The beneficial effects of this utility model are: This invention achieves smooth linear reciprocating motion of a large-span gantry by coordinating the crossbeam, movable support, elastic drive mechanism, driven mechanism, and guide rail, ensuring consistent operation of the elastic drive mechanisms on both sides. With consistent operation on both sides, the bolted connection surface of the gantry's crossbeam and movable support will not deform. This mounting surface is a weak point for fatigue when movement is inconsistent; this invention effectively solves the problem of localized fatigue, ensuring overall stability and service life. This invention does not address track wear by adjusting the track material or processing precision, as track processing precision is difficult to control and materials are expensive. Instead, this invention incorporates bolt guide rods and elastic elements in the elastic drive mechanism, providing elastic opening and closing functions, effectively reducing wear during operation. The process is simple and cost-effective.

[0021] In this utility model, the elastic drive mechanism and the driven mechanism use rollers and side wheels to clamp the track, ensuring that the operation does not deviate; the elastic drive mechanism and the driven mechanism are set on the front and rear sides of the movable support, so as to smoothly drive the crossbeam to move on the guide rail.

[0022] This invention utilizes the meshing transmission between the drive gear and rack, along with the coordinated action of the bolt guide rod and elastic element to achieve elastic opening and closing. Under the elastic action of the elastic element, the outer wall of the motor base moves closer to the connecting plate of the drive roller base, buffering the impact generated during gear meshing, reducing wear on the gear and rack, enhancing transmission reliability, and extending service life. When the gantry movement is obstructed and jamming occurs, the gear on the non-jammed side will rely on the elasticity of the elastic element to perform a tooth skipping protection function, thereby preventing the collapse of the large-span beam due to asynchronous movement on both sides. Specifically, the elastic element is compressed again, increasing the distance between the outer wall of the motor base and the connecting plate of the drive roller base, thus providing tooth skipping protection. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of a large-span linear moving gantry structure according to an embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the flexible drive mechanism; Figure 3 for Figure 1 Another structural diagram of the flexible drive mechanism; Figure 4 for Figure 1 Schematic diagram of the driven mechanism; Figure 5 for Figure 1 Schematic diagram of the guide rail structure; In the diagram: 1-Crossbeam, 2-Moving support, 3-Elastic drive mechanism, 31-Drive roller seat, 32-Active roller, 33-Active shaft, 34-Drive side wheel, 35-Connecting shaft, 36-Motor seat, 37-Drive motor, 38-Drive gear, 39-Connecting plate, 310-Bolt guide rod, 311-Elastic element, 4-Driven mechanism, 41-Driven roller seat, 42-Driven roller, 43-Driven shaft, 44-Driven side wheel, 5-Guide rail, 6-Rack, 7-Rubber buffer pad. Detailed Implementation

[0024] 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 a part of the embodiments of the present utility model, and not all of them; the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other. 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. Example 1

[0025] See Figure 1 As shown, this embodiment provides a gantry structure for large-span linear movement, including a crossbeam 1, a movable support 2, an elastic drive mechanism 3, a driven mechanism 4, and a guide rail 5. The two ends of the crossbeam 1 are supported by the movable support 2, and the crossbeam 1 is fixed to the surface of the movable support by bolts, thereby forming an integral rigid structure. An elastic drive mechanism 3 is provided on one side below the movable support 2, and a driven mechanism 4 is provided on the other side, located at the front and rear ends of the moving line, for realizing the overall moving support of the gantry. The elastic drive mechanism 3 and the driven mechanism 4 are set on the guide rail 5. The elastic drive mechanism 4 and the driven mechanism 4 cooperate to support the movable support 2 and the crossbeam 1, and can drive the entire gantry structure to reciprocate linearly along the guide rail 5.

[0026] Preferably, as needed, the movable support is a combined welded convex structure. The upper layer is used for connecting and supporting the crossbeam. The upper end of the movable cabinet support is fixed to the crossbeam with bolts, which facilitates installation, disassembly, maintenance and replacement. The bottom two sides of the lower layer are equipped with elastic drive mechanism and driven mechanism, which are set at the front and rear ends of the movable support to form a walking mechanism.

[0027] For details, please refer to Figure 2 As shown, the elastic drive mechanism 3 includes a drive roller seat 31, a drive roller 32, a drive shaft 33, a drive gear 38, a rack 6, a motor seat 36, and a drive motor 37. The drive roller seat 31 is located at the lower end of the movable support 2. A drive roller 32 is rotatably mounted inside the drive roller seat 31 via a drive shaft 33 and a bracket. The upper end of the drive roller seat is welded and fixed to the movable support. The drive roller supports the drive roller seat and the movable support. The bottom end of the drive roller 32 extends out of the drive roller seat 31 and rolls on the guide rail 5. One side of the drive roller seat 31 extends outward to form a connecting plate 39. Two drive side wheels 34 are arranged on both sides of the drive roller 32. The two drive side wheels 34 follow the sides of the rail 51, effectively preventing the gantry structure from shifting during movement and ensuring the gantry's movement is guided. The drive side wheels can be arranged as needed; drive side wheels can be provided on both the front and rear sides of the drive roller, meaning drive side wheels are located at all four corners of the drive roller. Alternatively, drive side wheels can be provided on the front or rear sides individually. Figure 2 This embodiment adopts a single-sided setting, and the drive side wheel is detachably mounted on the drive roller seat by bolts; The motor base 36 is connected to one side of the drive roller base 31 via a connecting shaft 35. A rubber buffer pad 7 is also provided on the side of the motor base 36 away from the drive roller base 31, which can play a role in preventing collisions and reducing shocks when the gantry reaches its limit travel. A drive motor 37 is vertically installed inside the motor base 36. A drive gear 38 is installed on the output shaft end of the drive motor 37. The drive gear 38 meshes with a rack 6 located on one side of the guide rail 5, thereby driving the drive roller 32 and the gantry structure to move linearly along the guide rail 5. A connecting plate 39 is spaced apart outside the motor base 36, and the connecting plate has threaded holes. A slotted groove is provided on the outer wall of the motor base to allow for some movement space during elastic opening and closing. The outer wall of the motor base 36 is connected to the connecting plate 39 via a bolt guide rod 310. The bolt guide rod 310 is horizontally positioned, with one end threaded to the outer wall of the motor base 36, and the other end penetrating the connecting plate 39 and fitted with an elastic element 311. Figure 3 As shown, depending on the actual operation, there can be several elastic elements. The elastic elements can be springs or disc springs. One end of the elastic element 311 abuts against the connecting plate 39, and the other end abuts against the limiting block fixed on the bolt guide rod 310, which effectively prevents the elastic element from falling off, so that the motor base 36 and the connecting plate 39 have an elastic opening and closing function, thereby buffering the meshing impact during operation, improving the stability and service life of the gear transmission. When the gantry movement is obstructed and jamming occurs, the gear 38 on the side that is not jammed will rely on the elasticity of the elastic element 311 to play the tooth skipping protection function, thereby avoiding the collapse accident caused by the asynchronous movement of the two sides of the large span beam.

[0028] For details, please refer to Figure 5 As shown, the upper surface of the guide rail 5 is the rail surface, and the driving roller and the driven roller roll on the rail surface. The two sides of the guide rail 5 are the rail webs. A rack 6 is fixedly installed on one side of the rail web along the length of the guide rail 5. The rack 6 meshes with the drive gear 38, and the driving side wheel and the driven side wheel roll on both sides of the rail, thereby ensuring stable guidance during the movement of the gantry.

[0029] For details, please refer to Figure 4 As shown, the driven mechanism 4 includes a driven roller seat 41 fixed to the lower end of the movable support 2. A rubber buffer pad 7 is provided on the side of the driven roller seat 41 away from the drive roller seat 31 to prevent collision. Two sets of driven side wheels are provided at the lower end of the driven roller seat 41 by bolts. The two sets of driven side wheels 44 are symmetrically arranged on both sides of the drive roller 42. The outer wall of the driven side wheel 44 abuts against the guide rail 5. The driven side wheel sets roll along both sides of the guide rail 5, thereby playing an auxiliary guiding and limiting role in the movement of the gantry and avoiding lateral swaying.

[0030] The large-span linear moving gantry structure provided by this utility model has the advantages of structural stability, reliable load bearing, flexible installation and convenient maintenance, and is suitable for large-span linear moving gantry scenarios.

[0031] In addition to the embodiments described above, this utility model may have other implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by this utility model.

Claims

1. A gantry structure for long-span linear movement, characterized in that: It includes a crossbeam (1), a movable support (2), an elastic drive mechanism (3), a driven mechanism (4), and a guide rail (5); The two ends of the crossbeam (1) are provided with the movable support (2) to support the crossbeam (1). The elastic drive mechanism (3) is provided on one side below the movable support (2), and the driven mechanism (4) is provided on the other side. The elastic drive mechanism (3) and the driven mechanism (4) are arranged on the guide rail (5). The elastic drive mechanism (4) and the driven mechanism (4) support the movable support (2) and the crossbeam (1) to reciprocate linearly along the guide rail (5).

2. The gantry structure for large-span linear movement according to claim 1, characterized in that: The elastic drive mechanism (3) includes a drive roller seat (31), a drive roller (32), a drive shaft (33), a drive gear (38), a rack (6), a motor seat (36), and a drive motor (37). The drive roller seat (31) is located at the lower end of the movable support (2). The drive roller seat (31) is rotatably provided with the drive roller (32) through the drive shaft (33) and the bracket. The bottom end of the drive roller (32) extends out of the drive roller seat (31) and is rolled on the guide rail (5). One side of the drive roller seat (31) extends outward to form a connecting plate (39). The motor base (36) is connected to one side of the drive roller base (31) via a connecting shaft (35). The drive motor (37) is vertically installed inside the motor base (36). The drive gear (38) is installed on the output shaft end of the lower end of the drive motor (37). The drive gear (38) meshes with a rack (6) located on one side of the guide rail (5) and moves accordingly. The connecting plate (39) is spaced apart from the motor base (36). The outer wall of the motor base (36) and the connecting plate (39) are connected together. The motor base (36) and the connecting plate (39) are connected by a bolt guide rod (310). The bolt guide rod (310) is horizontally set. One end of the bolt guide rod (310) is threaded to the outer wall of the motor base (36), and the other end penetrates the connecting plate (39) and is fitted with an elastic element (311). One end of the elastic element (311) abuts against the connecting plate (39), and the other end abuts against the limiting block fixed on the bolt guide rod (310), so that there is an elastic force between the motor base (36) and the connecting plate (39).

3. The gantry structure for large-span linear movement according to claim 2, characterized in that: A rubber buffer pad (7) is also provided on the side of the motor base (36) away from the drive roller base (31).

4. The gantry structure for large-span linear movement according to claim 2, characterized in that: The lower end of the drive roller seat (31) is provided with a drive side wheel assembly. The drive side wheels (34) in the drive side wheel assembly are symmetrically arranged on both sides of the drive roller (32). The outer wall of the drive side wheel (34) abuts against the guide rail (5). The drive side wheel assembly rolls along both sides of the guide rail (5).

5. The gantry structure for large-span linear movement according to claim 2, characterized in that: The upper surface of the guide rail (5) is the rail surface, and the two sides of the guide rail (5) are the rail webs. The rack (6) is fixedly installed on the rail web of one side of the guide rail (5) along the length direction of the guide rail (5). The rack (6) meshes with the drive gear (38).

6. The gantry structure for large-span linear movement according to claim 1, characterized in that: The driven mechanism (4) includes a driven roller seat (41) fixed at the lower end of the movable support (2). A rolling driven roller (42) is installed in the driven roller seat (41) through a driven shaft (43) and a bracket. The bottom end of the driven roller (42) is rolled on the guide rail (5).

7. The gantry structure for large-span linear movement according to claim 6, characterized in that: A rubber buffer pad (7) is provided on the side of the driven roller seat (41) away from the driving roller seat (31).

8. The gantry structure for long-span linear movement according to claim 6, characterized in that: The lower end of the driven roller seat (41) is provided with a driven side wheel group. The driven side wheel (44) in the driven side wheel group is symmetrically arranged on both sides of the driving roller (42). The outer wall of the driven side wheel (44) abuts against the guide rail (5). The driven side wheel group rolls along both sides of the guide rail (5).

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