Bridge type five-axis gantry machining center integrated spindle structure with dust collection function

Abstract

The utility model discloses a bridge type five -axial gantry machining center integral type main shaft structure with dust absorption function relates to machining technical field, solves the main shaft of bridge type five -axial gantry machining center and the problem that the exposed dust absorption pipeline is easy to deform and break down of poor appearance, it includes: main shaft box, the inner wall of main shaft box has at least one dust absorption pipeline, main shaft, rotary seal structure, rotary seal structure sets up between main shaft and main shaft box, and main shaft can rotate relative to main shaft box through rotary seal structure, and the cavity is formed in rotary seal structure, and the lower extreme of dust absorption pipeline is connected with the gas outlet of this cavity, and the gas inlet of cavity is connected with pipeline, and the pipeline extends to the area of the machining head of main shaft lower extreme. The utility model has carried out the optimization to the main shaft dust absorption structure of existing, through setting up dust absorption pipeline in the inner wall of main shaft box, makes the overall appearance of main shaft structure obtains greater promotion, can also play the effect of protecting dust absorption pipeline simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to an integrated spindle structure for a bridge-type five-axis gantry machining center with dust extraction function. Background Technology

[0002] Bridge-type five-axis gantry machining centers generate large amounts of flammable and explosive dust and debris during the processing of aluminum-magnesium alloys and carbon fiber composites. To ensure the safety of the machine tool during processing in a fully enclosed state, it is essential to remove the dust from the enclosed processing area to the greatest extent possible.

[0003] Currently, most five-axis gantry machining centers for processing composite materials on the market have dust extraction pipes installed on the outer side of the spindle box. The dust extraction pipes run from the top to the bottom of the ring-shaped dust extraction device on the outside of the spindle box, which greatly inconveniences the sheet metal protection design around the spindle box. The dust extraction pipe path is exposed on the outside of the spindle box, which makes it easy for the pipe to be bumped and deformed or even damaged after a long period of use. In addition, the external dust extraction pipes also greatly affect the overall aesthetics of the machine tool. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned problems by designing an integrated spindle structure for a bridge-type five-axis gantry machining center with a dust collection function. This solves the problems of poor spindle aesthetics and exposed dust collection pipes being prone to deformation and damage in bridge-type five-axis gantry machining centers.

[0005] To achieve the above objectives, the technical solution of this utility model is an integrated spindle structure for a bridge-type five-axis gantry machining center with dust extraction function, comprising: A spindle housing, the inner wall of which has at least one suction pipe, the suction pipe extending from the lower end of the spindle housing to the upper end of the spindle housing, the upper end of the suction pipe being used to connect to a vacuum cleaner; A spindle, which is rotatably mounted at the lower end of the spindle box; A rotary sealing structure is disposed between the spindle and the spindle housing. The spindle can rotate relative to the spindle housing through the rotary sealing structure. A cavity is formed inside the rotary sealing structure. The lower end of the dust suction pipe is connected to the air outlet of the cavity. The air inlet of the cavity is connected to a pipe that extends to the area where the machining head is located at the lower end of the spindle.

[0006] Preferably, two vertically penetrating dust suction channels are formed inside the inner wall of the spindle box, and the lower end of the dust suction channel is connected to the air outlet of the inner cavity of the rotary sealing structure.

[0007] Preferably, two dust collection and conveying pipes are embedded in the inner wall of the spindle box, and the lower end of the dust collection and conveying pipes is connected to the air outlet of the inner cavity of the rotary sealing structure.

[0008] Preferably, the upper end of the spindle passes through a rotary sealing structure and is connected to the spindle housing. The rotary sealing structure includes an upper fixed plate, an upper sealing plate, a lower sealing plate, and a lower fixed plate. The upper fixed plate is fixedly installed at the bottom of the spindle housing. The upper sealing plate is fixedly connected to the bottom of the upper fixed plate. The lower sealing plate is rotary sealed to the bottom of the upper sealing plate. The lower fixed plate is fixedly installed on the spindle. The lower sealing element is fixedly connected to the upper part of the lower fixed plate. A cavity is formed between the upper sealing plate and the lower sealing plate.

[0009] Preferably, the bottom of the lower seal protrudes downward to form at least one sealing portion, the upper part of the upper seal protrudes upward along the circumferential direction to form a ring, the top of the ring has at least one sealing groove along the circumferential direction, a sealing ring is provided in the sealing groove, and the sealing portion can fit tightly against the inner wall of the ring.

[0010] Preferably, the upper seal has at least one air outlet, and the lower seal has at least one air inlet on its outer peripheral surface.

[0011] Preferably, a dust collection hood is provided on the outer side of the spindle. The dust collection hood includes a first housing and a second housing. The first housing is fixedly installed on the outer side of the spindle. The second housing and the first housing are connected by a rotary seal. A dust collection chamber is formed between the first housing and the second housing. The air outlet on the first housing is connected to the air inlet on the rotary seal structure through a pipe. The air inlet on the second housing is connected to a pipe. The pipe extends to the area where the machining head is located at the lower end of the spindle. The second housing and the pipe connected to the second housing can rotate around a horizontal axis.

[0012] Preferably, the dust collection chamber is provided with a connecting rod and a bushing. The connecting rod is connected to the center of the first housing, and the bushing is rotatably connected to the connecting rod through a bearing and fixedly connected to the second housing through bolts.

[0013] Preferably, at least one sealing groove is formed on the side of the first housing near the second housing, and at least one sealing portion is formed on the side of the second housing near the first housing along the circumferential direction, wherein the sealing portion and the sealing groove are slidably connected.

[0014] Its advantages over existing technologies are: This invention optimizes the existing spindle suction structure by placing the suction pipe inside the inner wall of the spindle housing, significantly improving the overall aesthetics of the spindle structure and protecting the suction pipe. A rotary seal structure is installed between the lower end of the spindle housing and the spindle, allowing the spindle to rotate relative to the spindle housing without compromising sealing. The rotary seal structure contains a cavity; the cavity's outlet connects to the suction pipe, the upper end of which is connected to a vacuum cleaner. The cavity's inlet is connected to a pipe that extends to the area of ​​the machining head at the lower end of the spindle.

[0015] During machining, the vacuum cleaner draws air outward, creating negative pressure in the suction pipe and cavity. Dust generated by the machining head at the lower end of the spindle during machining is drawn into the cavity of the rotary seal structure through the pipe under the strong negative pressure suction. It then enters the suction pipe from the cavity's outlet and finally enters the vacuum vacuum cleaner. While the machining head rotates, the spindle can rotate relative to the spindle housing via the rotary seal structure, ensuring a tight seal without affecting the machining process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the integrated spindle structure of the bridge-type five-axis gantry machining center with dust collection function in a preferred embodiment of this utility model. Figure 2 yes Figure 1 A structural diagram showing the removal of the spindle box; Figure 3 This is a schematic diagram of the installation structure of the main shaft, rotary seal structure, and dust collection hood; Figure 4 This is an exploded structural diagram of the dust collection hood installed on the outside of the spindle; Figure 5 This is an exploded structural diagram of a rotary seal structure; Figure 6 This is a schematic diagram of the upper sealing plate in a rotary seal structure.

[0017] In the figure, 1. Spindle box; 2. Spindle; 3. Rotary sealing structure; 31. Upper fixing plate; 32. Upper sealing plate; 321. Sealing part; 33. Lower sealing plate; 34. Lower fixing plate; 35. Sealing ring; 4. Dust collection and conveying pipe; 5. Dust collection hood; 51. First housing; 52. Second housing; 53. Connecting rod; 54. Bushing; 6. Hose. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0019] A preferred embodiment of this utility model proposes an integrated spindle structure for a bridge-type five-axis gantry machining center with dust collection function. This improves upon the existing spindle structure by placing the dust collection pipe inside the spindle box 1, which improves the overall aesthetics and protects the dust collection pipe.

[0020] For details, see Figures 1-3 The main spindle structure mainly includes spindle 2, spindle box 1, rotary sealing structure 3, and dust suction pipe.

[0021] The spindle box 1 contains a drive structure (not shown in the figure) for controlling the rotation of the spindle 2 around the central axis along the length of the spindle box 1. The machining head (not shown in the figure) mounted on the spindle 2 can rotate around two rotation axes, one around the central axis along the length of the spindle box 1 (i.e., the B axis) and the other around a horizontal axis (i.e., the C axis), to achieve multi-angle machining.

[0022] The upper end of the spindle 2 extends into the spindle housing 1 and connects to the drive structure inside the spindle housing 1. The rotary seal structure 3 is located between the spindle 2 and the spindle housing 1.

[0023] In this embodiment, two dust collection and conveying pipes 4 are embedded in the inner wall of the spindle box 1, thus forming two dust collection pipelines. The dust collection and conveying pipes 4 are integrally cast with the spindle box 1. That is to say, during the casting of the spindle box 1, the dust collection and conveying pipes 4 are placed into the mold of the spindle box 1, and then after casting, the dust collection and conveying pipes 4 are directly embedded in the inner wall of the spindle box 1.

[0024] The dust collection conveying pipe 4 extends along the length of the main shaft box 1. The length of the dust collection conveying pipe 4 is not less than the length of the main shaft box 1, and is generally greater than the length of the main shaft box 1, so that the upper ends of the two dust collection conveying pipes 4 protrude from the upper end of the main shaft box 1, making it easy to connect to the vacuum cleaner.

[0025] In other technical solutions, the dust collection and conveying pipe 4 can be omitted. During the casting process, two mold rods can be pre-embedded in the inner wall of the spindle box 1. After molding, the mold rods can be removed to form two vertically connected dust collection channels in the inner wall of the spindle box 1, thereby forming two dust collection pipes. Then, the vacuum cleaner connects to the upper end of the dust collection channel through the pipe.

[0026] Two suction hoses result in higher suction efficiency, and if one suction hose becomes clogged, the other can continue operating. Alternatively, only one suction hose can be installed.

[0027] The rotary seal structure 3 has a through hole in the middle so that the upper end of the spindle 2 can pass through the through hole and extend into the spindle box 1, and be rotatably connected to the lower end of the spindle box 1.

[0028] like Figure 5 As shown, the rotary sealing structure 3 mainly consists of an upper fixed plate 31, an upper sealing plate 32, a lower sealing plate 33, and a lower fixed plate 34. The upper fixed plate 31 and the lower fixed plate 34 are respectively fixed to the lower end of the spindle box 1 and the upper side of the spindle 2 by bolts. The upper sealing plate 32 and the lower sealing plate 33 are respectively fixed to the bottom of the upper fixed plate 31 and the upper part of the lower fixed plate 34. The lower sealing plate 33 protrudes upwards along the circumferential direction to form a ring, which contacts the bottom of the upper sealing plate 32, thus forming a sealed annular cavity between the upper sealing plate 32 and the lower sealing plate 33.

[0029] The upper sealing plate 32 has two air outlets that communicate with the cavity. Correspondingly, the upper fixing plate 31 also has two holes so that the lower ends of the two dust collection and conveying pipes 4 can pass through the holes and connect to the two air outlets, or the lower ends of the two dust collection channels can connect to the air outlets.

[0030] like Figure 6 As shown, a sealing portion 321 is formed by a downward circumferential protrusion at the bottom of the upper sealing plate 32. Correspondingly, a relief groove is formed by a recess on the inner circumferential surface of the lower sealing plate 33. The outer circumferential surface of the sealing portion 321 is in close contact with the inner circumferential surface of the barrier, and the lower end of the sealing portion 321 is in close contact with the bottom surface of the relief groove to form a seal. A sealing groove is also formed at the top of the barrier of the upper sealing plate 32, and a sealing ring 35 is provided in the sealing groove to enhance the seal.

[0031] Without affecting the sealing performance, when the lower sealing plate 33 rotates relative to the upper sealing plate 32, the sealing part 321 can rotate along the clearance groove. At this time, the sealing ring 35 is in close contact with the bottom surface of the upper sealing plate 32 to form a seal.

[0032] An air inlet is provided on the enclosure of the lower seal. The number of air inlets is not unique and can be two or more.

[0033] like Figure 4As shown, a dust collection hood 5 is also provided on the outside of the main spindle 2. The dust collection hood 5 is composed of a first housing 51, a second housing 52, a connecting rod 53, a bushing 54, and other components. Both the first housing 51 and the second housing 52 are circular structures, connected by a rotary seal, and can rotate relative to each other. The rotation axis of the second housing 52 coincides with the horizontal rotation axis of the main spindle 2. In other words, when the machining head on the main spindle 2 rotates around the horizontal rotation axis, the second housing 52 will also rotate around that axis.

[0034] Both the connecting rod 53 and the bushing 54 are located inside the dust collection chamber. One end of the connecting rod 53 extends radially outward to form a circular plate with multiple screw holes, each containing a screw. The circular plate end of the connecting rod 53 is fixedly connected to the inner wall of the first housing 51 by screws. The central axis of the connecting rod 53 coincides with the central axes of the first housing 51 and the second housing 52. The bushing 54 is rotatably connected to the connecting rod 53 via bearings. The second housing 52 is fixedly connected to the bushing 54 by screws. The bushing 54 confines the second housing 52 to the first housing 51, and when the second housing 52 rotates relative to the first housing 51, it causes the bushing 54 to rotate relative to the connecting rod 53.

[0035] An air outlet is provided on the first housing 51, and an air inlet is provided on the second housing 52. The air outlet on the first housing 51 is connected to the air inlet on the lower sealing plate 33 through a hose 6. The air outlet on the second housing 52 is connected to a hose 6, and the other end of the hose 6 extends to the area where the machining head is located on the spindle 2.

[0036] The number of air inlets on the upper sealing plate 32 is determined by the number of air outlets on the first housing 51.

[0037] A sealing groove and a sealing portion are formed on opposite sides of the first housing 51 and the second housing 52, respectively. Both the sealing groove and the sealing portion are annular and are adapted to each other. The sealing portion is embedded in the sealing groove to form a seal, and the sealing portion can slide relative to the sealing groove so that the first housing 51 and the second housing 52 can rotate relative to each other. The sealing groove can be on the first housing 51 or the second housing 52. Correspondingly, the sealing portion can be on the second housing 52 or the first housing 51.

[0038] When the vacuum cleaner draws air outward, negative pressure is generated sequentially in the suction pipe, the cavity of the rotary sealing structure 3, and the suction chamber. The debris generated during the processing is sucked into the suction chamber by the hose 6, then into the cavity of the rotary sealing structure 3, and finally into the vacuum cleaner through the two suction pipes.

[0039] When the machining head rotates around the central axis of the spindle box 1 (i.e., the B axis), the spindle 2, the lower sealing plate 33 and the dust hood 5 will rotate together relative to the spindle box 1 and the upper sealing plate 32; when the machining head rotates around the horizontal axis (i.e., the C axis), the second housing 52 and the hose 6 connected to the second housing 52 will rotate together relative to the first housing 51.

[0040] The above technical solution only embodies the preferred technical solution of this utility model. Any changes that may be made by those skilled in the art to certain parts of it embody the principle of this utility model and fall within the protection scope of this utility model.

Claims

1. A bridge-type five-axis gantry machining center with integrated spindle structure featuring dust extraction function, characterized in that: include: The spindle box (1) has at least one suction pipe inside its inner wall. The suction pipe extends from the lower end of the spindle box (1) to the upper end of the spindle box (1). The upper end of the suction pipe is used to connect to a vacuum cleaner. The spindle (2) is rotatably mounted at the lower end of the spindle box (1); A rotary sealing structure (3) is provided between the spindle (2) and the spindle box (1). The spindle (2) can rotate relative to the spindle box (1) through the rotary sealing structure (3). A cavity is formed inside the rotary sealing structure (3). The lower end of the dust suction pipe is connected to the air outlet of the cavity. The air inlet of the cavity is connected to a pipe. The pipe extends to the area where the machining head is located at the lower end of the spindle (2).

2. The integrated spindle structure of the bridge-type five-axis gantry machining center with dust extraction function according to claim 1, characterized in that, The inner wall of the spindle box (1) has two vertically penetrating dust suction channels, the lower end of which is connected to the air outlet of the cavity inside the rotary sealing structure (3).

3. The integrated spindle structure of the bridge-type five-axis gantry machining center with dust extraction function according to claim 1, characterized in that, Two dust collection and conveying pipes (4) are embedded in the inner wall of the spindle box (1), and the lower end of the dust collection and conveying pipes (4) is connected to the air outlet of the cavity inside the rotary sealing structure (3).

4. The integrated spindle structure of the bridge-type five-axis gantry machining center with dust extraction function according to claim 1, characterized in that, The upper end of the spindle (2) passes through the rotary sealing structure (3) and is connected to the spindle box (1). The rotary sealing structure (3) includes an upper fixing plate (31), an upper sealing plate (32), a lower sealing plate (33), and a lower fixing plate (34). The upper fixing plate (31) is fixedly installed at the bottom of the spindle box (1). The upper sealing plate (32) is fixedly connected to the bottom of the upper fixing plate (31). The lower sealing plate (33) is rotaryly sealed to the bottom of the upper sealing plate (32). The lower fixing plate (34) is fixedly installed on the spindle (2). The lower sealing plate (33) is fixedly connected to the upper part of the lower fixing plate (34). A cavity is formed between the upper sealing plate (32) and the lower sealing plate (33).

5. The integrated spindle structure of the bridge-type five-axis gantry machining center with dust extraction function according to claim 4, characterized in that, The bottom of the upper sealing plate (32) protrudes downward to form at least one sealing part (321), and the upper part of the lower sealing plate (33) protrudes upward along the circumferential direction to form a ring. The top of the ring has at least one sealing groove along the circumferential direction, and a sealing ring (35) is provided in the sealing groove. The sealing part (321) can fit tightly against the inner wall of the ring.

6. The integrated spindle structure of the bridge-type five-axis gantry machining center with dust extraction function according to claim 4, characterized in that, The upper sealing plate (32) has at least one air outlet, and the lower sealing plate (33) has at least one air inlet on its outer peripheral surface.

7. The integrated spindle structure of the bridge-type five-axis gantry machining center with dust extraction function according to claim 1, characterized in that, A dust collection hood (5) is provided on the outside of the spindle (2). The dust collection hood (5) includes a first housing (51) and a second housing (52). The first housing (51) is fixedly installed on the outside of the spindle (2). The second housing (52) is rotary sealed to the first housing (51). A dust collection chamber is formed between the first housing (51) and the second housing (52). The air outlet on the first housing (51) is connected to the air inlet on the rotary sealing structure (3) through a pipe. The air inlet on the second housing (52) is connected to a pipe. The pipe extends to the area where the processing head is located at the lower end of the spindle (2). The second housing (52) and the pipe connected to the second housing (52) can rotate around a horizontal axis.

8. The integrated spindle structure of the bridge-type five-axis gantry machining center with dust extraction function according to claim 7, characterized in that, The dust collection chamber is provided with a connecting rod (53) and a bushing (54). The connecting rod (53) is connected to the center of the first housing (51). The bushing (54) is rotatably connected to the connecting rod (53) through a bearing and is fixedly connected to the second housing (52) through bolts.

9. The integrated spindle structure of the bridge-type five-axis gantry machining center with dust extraction function according to claim 7, characterized in that, At least one sealing groove is formed on the side of the first housing (51) near the second housing (52), and at least one sealing part is formed on the side of the second housing (52) near the first housing (51) along the circumferential direction. The sealing part and the sealing groove are slidably connected.

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