A spindle head load device for a bridge-type machine tool

Abstract

The application discloses a main shaft box load device for a bridge type machine tool, wherein the main shaft box is slidably connected to a beam of the bridge type machine tool, and the main shaft box comprises a slide and a slide plate; the device comprises: an unloading auxiliary beam which is fixed in parallel to one side of the beam and forms a channel for the movement of the main shaft box between the unloading auxiliary beam and the beam; and a load mechanism which comprises an upper hinged structure, a lower hinged structure and an elastic component, wherein one end of the upper hinged structure is connected to the slide plate, and one end of the lower hinged structure is slidably connected to the unloading auxiliary beam; the main shaft box load device for the bridge type machine tool provides rotational freedom through the two hinged structures, ensures that the elastic component is always subjected to axial force during the overturning of the main shaft box, provides displacement variation through the linear freedom of the elastic component, and enables the compressed elastic component to output greater reaction force to offset the overturning tendency caused by the load, thereby realizing the reaction force output of the load mechanism.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of machining center, more particularly, relates to a spindle box load device for bridge type machine tool. BACKGROUND

[0002] The machining center of bridge type frame, the spindle box is longitudinally arranged. Here the spindle box is connected by ram and slide plate, and does vertical downward Z-axis feeding movement. When developing high lifting frame and long Z-axis product, the ram extends downward, and the machining unit of end face is easy to deform in the reverse direction of feeding due to lever action, and in the free state, the change of gravity center due to different up and down positions of the ram is easy to cause side leaning phenomenon, which makes the structural rigidity of the spindle box decrease, and the continuously changing impact during the horizontal movement of the spindle box will also affect its dynamic stability.

[0003] The structural rigidity of the ram mainly comes from two aspects, one is the structural rigidity of itself, and the other is the structural rigidity of the connection with the slide plate. Under the condition of ensuring that the internal rib plate distribution of the ram is reasonable and the structural rigidity of itself is sufficient, increasing external support to offset the load change during movement is a good direction to improve the structural rigidity. Due to the limitation of traditional bridge type structure, it is difficult to increase auxiliary support on the cross beam, and it is a difficulty to introduce a support mechanism from the outside. SUMMARY

[0004] The purpose of the present application is to solve the problems existing in the prior art, and provide a spindle box load device for bridge type machine tool. The spindle box load device for bridge type machine tool provides rotational freedom through two hinged structures, ensures that the elastic component is always subjected to axial force during the overturning of the spindle box, utilizes the linear freedom of the elastic component to provide displacement change, so that the elastic component outputs greater reaction force after compression to offset the overturning trend caused by the load, realizes the reaction force output of the load mechanism, offsets the overturning moment change continuously generated during the movement of the spindle box by cooperating with the unloading auxiliary beam, and enhances the structural rigidity of the spindle box.

[0005] In order to achieve the above purpose, the present application provides a spindle box load device for bridge type machine tool, the spindle box is slidingly connected on the cross beam of the bridge type machine tool, and the spindle box comprises a ram and a slide plate, and the device comprises:

[0006] An unloading auxiliary beam is fixed in parallel on one side of the cross beam, and a channel for moving the spindle box is formed between the unloading auxiliary beam and the cross beam;

[0007] A load mechanism, the load mechanism comprises an upper hinged structure, a lower hinged structure and an elastic component, one end of the upper hinged structure is connected with the slide plate, one end of the lower hinged structure is slidingly connected with the unloading auxiliary beam, and the two ends of the elastic component are connected with the other end of the upper hinged structure and the other end of the lower hinged structure respectively, and the elastic component is in a pre-compressed state.

[0008] Optionally, the upper hinged structure comprises:

[0009] a support arm, one end of the support arm being connected with the sliding plate;

[0010] two first support plates, the two first support plates being respectively arranged on two sides of the other end of the support arm;

[0011] a shaft seat, the shaft seat being arranged between the two first support plates, and two ends of the shaft seat being respectively rotationally connected with the two first support plates.

[0012] Optionally, the lower hinged structure comprises:

[0013] a base, a lower end of the base being slidingly connected on the unloading auxiliary beam;

[0014] two second support plates, the two second support plates being gap-arranged on an upper end of the base;

[0015] a rotating shaft, the rotating shaft being provided with a central through hole, and two ends of the rotating shaft being respectively rotationally connected with the two second support plates;

[0016] a top block, the top block being arranged at a lower end of the rotating shaft.

[0017] Optionally, the elastic component comprises a cylinder body and a cylinder rod, the cylinder rod being elastically connected with the cylinder body, the cylinder body being arranged inside the shaft seat and connected with the shaft seat, and an end surface of the cylinder rod being connected with the top block through the central through hole of the rotating shaft.

[0018] Optionally, the elastic component is a nitrogen spring, and the cylinder rod and the top block are gap-fitted with the central through hole.

[0019] Optionally, further comprising a traction plate, upper and lower ends of the traction plate being respectively connected with the support arm and the base.

[0020] Optionally, further comprising a first bolt, a screw rod part of the first bolt being connected with the top block through the shaft seat, and a nut part of the first bolt being clamped with the shaft seat.

[0021] Optionally, further comprising a second bolt, the top block being gap-formed with the rotating shaft through the second bolt.

[0022] Optionally, the number of the first bolts is two, the two first bolts being respectively located on two sides of the rotating shaft and gap-formed with the rotating shaft.

[0023] Optionally, an imitation curved surface is arranged on an upper side of the unloading auxiliary beam, a slide rail is arranged on the imitation curved surface, and a lower end of the base is slidingly fitted with the slide rail.

[0024] The present application provides a bridge machine tool spindle box load device, which has the advantages of:

[0025] The bridge machine tool spindle box load device provides rotational freedom through two hinged structures, ensures that the elastic component is always subjected to axial force during the overturning of the spindle box, provides displacement variation using the linear freedom of the elastic component extension and retraction, and makes the compressed elastic component output greater reaction force to offset the overturning trend caused by the load, realizes reaction force output of the load mechanism, offsets the overturning torque change generated during the movement of the spindle box in cooperation with the unloading auxiliary beam, and enhances the rigidity of the spindle box structure.

[0026] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0027] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the several views, and wherein:

[0028] Fig. 1 A structural schematic diagram of a bridge machine tool spindle box load device according to an embodiment of the present application is shown.

[0029] Fig. 2 A partial enlarged view of a bridge machine tool spindle box load device according to an embodiment of the present application is shown.

[0030] Fig. 3 An exploded view of a rotating shaft of a bridge machine tool spindle box load device according to an embodiment of the present application is shown.

[0031] BRIEF DESCRIPTION OF DRAWINGS

[0032] 1, beam; 2, ram; 3, slide plate; 4, shaft seat; 5, elastic component; 6, first support plate; 7, support arm; 8, rotating shaft; 9, base; 10, traction plate; 11, first bolt; 12, second bolt; 13, unloading auxiliary beam; 14, top block. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present application will be described in more detail below. Although the preferred embodiments of the present application are described below, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present application is more thorough and complete, and the scope of the present application is fully conveyed to those skilled in the art.

[0034] Fig. 1 A schematic diagram of the structure of a spindle box load-bearing device for a bridge machine tool according to an embodiment of the present invention is shown; Fig. 2 A partially enlarged view of a spindle box load-bearing device for a bridge machine tool according to an embodiment of the present invention is shown; Fig. 3 An exploded view of the shaft of a spindle box load-bearing device for a bridge machine tool according to an embodiment of the present invention is shown.

[0035] like Figs. 1-3 As shown, a spindle box load-bearing device for a bridge machine tool is disclosed. The spindle box is slidably connected to the crossbeam 1 of the bridge machine tool. The spindle box includes a slide 2 and a slide plate 3. The device includes:

[0036] The unloading auxiliary beam 13 is fixed parallel to one side of the crossbeam 1, and a channel for the movement of the spindle box is formed between the unloading auxiliary beam 13 and the crossbeam 1.

[0037] The load-bearing mechanism includes an upper hinge structure, a lower hinge structure, and an elastic component 5. One end of the upper hinge structure is connected to the slide plate 3, and one end of the lower hinge structure is slidably connected to the unloading auxiliary beam. The two ends of the elastic component 5 are respectively connected to the other ends of the upper hinge structure and the other ends of the lower hinge structure. The elastic component 5 is in a pre-compressed state.

[0038] Specifically, by using the elastic component 5 as the core element, combined with the upper and lower hinge structures to provide rotational freedom, the elastic component 5 is always subjected to axial force during the overturning process of the spindle box. The linear freedom of the elastic component 5's extension and contraction provides displacement change, so that the compressed elastic component 5 outputs a larger reaction force to offset the overturning tendency brought about by the load, realizing the reaction force output of the load-bearing mechanism. Together with the unloading auxiliary beam 13, it offsets the overturning moment changes that are continuously generated during the movement of the spindle box, thereby enhancing the structural rigidity of the spindle box.

[0039] In this embodiment, the upper hinge structure includes:

[0040] Support arm 7, one end of which is connected to slide plate 3;

[0041] Two first support plates 6 are respectively set on both sides of the other end of the support arm 7;

[0042] Shaft seat 4 is disposed between two first support plates 6, and both ends of shaft seat 4 are rotatably connected to the two first support plates 6 respectively.

[0043] Specifically, the upper hinge structure and the slide plate 3 are connected by the support arm 7, and the upper hinge structure is formed by the first bracket plate 6 and the bearing seat 4.

[0044] In this embodiment, the lower hinge structure includes:

[0045] The base 9 is slidingly connected at the lower end to the unloading auxiliary beam 13.

[0046] The two second support plates are arranged at the upper end of the base 9 with a gap therebetween.

[0047] The rotating shaft 8 is provided with a central through hole, and the two ends of the rotating shaft 8 are rotatably connected to the two second support plates respectively.

[0048] The top block 14 is arranged at the lower end of the rotating shaft 8.

[0049] Specifically, the upper and lower hinged structures are connected by the elastic component 5, and the lower hinged structure is formed by the second support plates cooperating with the rotating shaft 8 and the base 9.

[0050] In this embodiment, the elastic component 5 includes a cylinder body and a cylinder rod, the cylinder rod is elastically connected to the cylinder body, the cylinder body is arranged in the interior of the shaft seat 4 and connected to the shaft seat 4, and the end face of the cylinder rod is connected to the top block 14 through the central through hole of the rotating shaft 8.

[0051] In this embodiment, the elastic component 5 is a nitrogen spring, and the cylinder rod and the top block are gap-fitted with the central through hole.

[0052] Specifically, the central through hole of the rotating shaft 8 is provided with a gap hole face cooperating with the top block 14 and a gap hole face cooperating with the elastic component 5.

[0053] In this embodiment, the traction plate 10 is further included, and the upper and lower ends of the traction plate 10 are connected to the support arm 7 and the base 9 respectively.

[0054] Specifically, the traction plate 10 is Z-shaped, and the bending part of the traction plate 10 is foldable. The Z-shaped structure of the traction plate 10 can adapt to the relative movement of the base 9 and the support arm 7, and the support plate can avoid the dislocation movement of the load force mechanism along the rotating shaft 8.

[0055] Further, the traction plate 10 is strong in horizontal direction and weak in vertical direction, which can protect the two hinged structures and the elastic component 5 from horizontal shear force and avoid interfering with the extension and contraction of the elastic component 5.

[0056] In this embodiment, the first bolt 11 is further included, and the shank part of the first bolt 11 is connected to the top block 14 through the shaft seat 4.

[0057] Specifically, the top block 14 and the shaft seat 4 are connected by the first bolt 11, so that the compression pre-tightening force of the elastic component 5 can be changed by adjusting the distance between the top block 14 and the shaft seat 4, and the dislocation movement of the top block 14 and the shaft seat 4 along the rotating shaft 8 is avoided, so that the radial deformation of the cylinder rod and the cylinder body of the elastic component 5 is avoided, and the axial stress of the cylinder rod is ensured.

[0058] In the embodiment, the second bolt 12 is further included, and the top block 14 is spaced apart from the rotating shaft 8 by the second bolt 12.

[0059] Specifically, the top block 14 and the rotating shaft 8 are fixed by the second bolt 12.

[0060] In the embodiment, the number of the first bolts 11 is two, and the two first bolts 11 are respectively located on the two sides of the rotating shaft 8 and are spaced apart from the rotating shaft 8.

[0061] Specifically, the support strength is improved, and the dislocation movement of the top block 14 and the shaft seat 4 along the rotating shaft 8 is avoided.

[0062] Further, the number of the second bolts 12 is two, and the connecting line of the two second bolts 12 is parallel to the axis of the rotating shaft 8.

[0063] In the embodiment, the profiled curved surface is arranged on the upper side of the unloading auxiliary beam 13, the slide rail is arranged on the profiled curved surface, and the lower end of the base 9 is in sliding cooperation with the slide rail.

[0064] Specifically, the profiled curved surface of the unloading auxiliary beam 13 is a stress surface, and the pre-machining after profiling (for example, a wave, a circular arc, etc.) is obtained according to the deformation condition after the load action, and the main shaft box is dynamically stable in the movement process along the cross beam 1 by cooperating with the load mechanism.

[0065] In the embodiment, the main shaft box load device for the bridge type machine tool is used, and the movement along the cross beam 1 is taken as an example. When the slide plate 3 of the main shaft box has a deformation trend under the overturning force of the slide rest 2, the overturning force is applied to the load mechanism by the supporting arm 7. The load mechanism takes the elastic component 5 as a core element, utilizes the compact structure, stable work and maintenance-free characteristics of the elastic component 5, provides the rotation freedom degree by combining the two hinged structures formed by the rotating shaft 8 and the shaft seat 4, further provides the displacement change amount by cooperating with the linear freedom degree of the elastic component 5, realizes the reaction force output of the load mechanism, and the elastic component 5 outputs greater reaction force after compression to offset the overturning trend caused by the load. The unloading auxiliary beam 13 is cooperated to offset the overturning moment change continuously generated in the movement process of the main shaft box, and the rigidity of the main shaft box structure is enhanced.

[0066] The above has described the embodiments of the present application, and the above description is exemplary, is not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A spindle box load-bearing device for a bridge machine tool, wherein the spindle box is slidably connected to the crossbeam of the bridge machine tool, and the spindle box includes a ram and a slide plate, characterized in that, The device includes: An unloading auxiliary beam is fixed parallel to one side of the crossbeam, and a channel for the movement of the spindle box is formed between the unloading auxiliary beam and the crossbeam. The load-bearing mechanism includes an upper hinge structure, a lower hinge structure, and an elastic component. One end of the upper hinge structure is connected to the sliding plate, one end of the lower hinge structure is slidably connected to the unloading auxiliary beam, and both ends of the elastic component are respectively connected to the other ends of the upper hinge structure and the lower hinge structure. The elastic component is in a pre-compressed state. The upper hinge structure includes: A support arm, one end of which is connected to the slide plate; Two first support plates are respectively disposed on both sides of the other end of the support arm; A bearing seat is disposed between two first support plates, and both ends of the bearing seat are rotatably connected to the two first support plates respectively. The lower hinge structure includes: The base, the lower end of which is slidably connected to the unloading auxiliary beam; Two second support plates are provided, with a gap between them at the upper end of the base; A rotating shaft with a central through hole, the two ends of which are rotatably connected to two second support plates respectively; A top block is disposed at the lower end of the rotating shaft.

2. The spindle box load-bearing device for a bridge-type machine tool according to claim 1, characterized in that, The elastic component includes a cylinder body and a cylinder rod. The cylinder rod is elastically connected to the cylinder body. The cylinder body is disposed inside the bearing seat and connected to the bearing seat. The end face of the cylinder rod passes through the central through hole of the rotating shaft and is connected to the top block.

3. The spindle box load-bearing device for a bridge-type machine tool according to claim 2, characterized in that, The elastic component is a nitrogen spring, and the cylinder rod and the top block are clearance-fitted with the central through hole.

4. The spindle box load-bearing device for a bridge-type machine tool according to claim 1, characterized in that, It also includes a traction plate, the upper and lower ends of which are connected to the support arm and the base, respectively.

5. A spindle box load-bearing device for a bridge-type machine tool according to claim 1, characterized in that, It also includes a first bolt, the threaded portion of which passes through the bearing and connects to the top block, and the nut portion of the first bolt engages with the bearing.

6. The spindle box load-bearing device for a bridge-type machine tool according to claim 1, characterized in that, It also includes a second bolt, through which the top block forms a gap with the rotating shaft.

7. A spindle box load-bearing device for a bridge-type machine tool according to claim 5, characterized in that, There are two first bolts, which are located on both sides of the rotating shaft and form a gap with the rotating shaft.

8. The spindle box load-bearing device for a bridge-type machine tool according to claim 1, characterized in that, The upper side of the unloading auxiliary beam is provided with a contoured curved surface, and a slide rail is provided on the contoured curved surface. The lower end of the base slides in cooperation with the slide rail.

Images