C-axis limiting device of full-automatic universal milling head

Abstract

A C-axis limiting device of a full-automatic universal milling head belongs to the technical field of full-automatic universal milling heads, and comprises a connector and a C-axis scale ring, the C-axis scale ring is fixed on an A-axis box body, and the C-axis scale ring is connected with the connector through a movable straight-tooth end-toothed disc and a fixed straight-tooth end-toothed disc. An annular supporting seat is arranged on the side face of the connecting body, a detection plate is arranged in the supporting seat, a reset spring mechanism is arranged between the detection plate and the supporting seat, a proximity switch A and a proximity switch B which are located on the two sides of the detection plate are arranged at the top of the supporting seat, and a shifting block corresponding to the detection plate in the front-back direction is arranged on the C-axis scale ring. A notch corresponding to the shifting block is formed in the bottom of the supporting base. The C-axis limiting device of the full-automatic universal milling head is reasonable in design, simple in structure, high in interference resistance and flexibility and capable of effectively improving the protection effect of C-axis indexing limit position limiting and improving the use reliability of the full-automatic universal milling head, and a mechanical structure is adopted.

Description

Technical Field

[0001] The invention relates to the technical field of full-automatic universal milling heads, and in particular to a C-axis limiting device of a full-automatic universal milling head. Background Art

[0002] A fully automatic universal milling head refers to a milling head whose machine tool output axis can rotate in both horizontal and vertical planes. From the perspective of the machine tool coordinate system, it is a milling head whose machine tool output axis can rotate around the machine tool Z axis and X axis (or Y axis). Among them, the axis around the machine tool Z axis is called the C axis, and the axis around the machine tool X axis is called the A axis. Therefore, a fully automatic universal milling head can enable the machine tool to have five coordinate axes and five-axis machining capabilities.

[0003] At present, the fully automatic universal milling head is an important accessory of machine tools, with a wide range of application scenarios and important functions. Among them, the C-axis positive and negative limit of the fully automatic universal milling head equipped with a gantry boring and milling machine or a floor-standing boring and milling machine generally adopts an external encoder to control the position of the positive and negative limit angles of the C-axis, and does not have a mechanical limit structure.

[0004] Although the external encoder can control the extreme angle limit of the C-axis, there are still the following shortcomings in actual use: Since the A-axis of the fully automatic universal milling head is equipped with an angle encoder, the cable of the A-axis angle limit and clamping and release detection switch signal needs to be wound along the C-axis. Therefore, during the C-axis indexing process, the external encoder of the C-axis is prone to abnormalities, which will cause the C-axis to exceed the limit position and break the signal cable. Once this fault occurs, recovery is very cumbersome, affecting production operations. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art that the external encoder is prone to malfunction and thus breaks the signal cable, and to provide a fully automatic universal milling head C-axis limit device, which has a reasonable design, a simple structure, a mechanical structure, strong anti-interference ability, and high flexibility. It can not only effectively improve the protection effect of the C-axis indexing limit position limit, but also improve the use reliability of the fully automatic universal milling head, and is suitable for promotion.

[0006] The present invention is realized by the following technical scheme: a C-axis limit device of a fully automatic universal milling head, comprising a coupling body and a C-axis scale ring, wherein the C-axis scale ring is fixed on an A-axis housing, and the C-axis scale ring is connected to the coupling body through a movable straight-tooth end toothed disc and a fixed straight-tooth end toothed disc. An annular support seat is arranged on the side of the coupling body, a rotatable detection plate is arranged inside the support seat, and a reset spring mechanism is arranged between the detection plate and the support seat. A proximity switch A and a proximity switch B located on both sides of the detection plate are arranged on the top of the support seat, and the proximity switch A and the proximity switch B are electrically connected to the control system of the fully automatic universal milling head. The proximity switch A and the proximity switch B cooperate with the detection plate, and when the detection plate rotates, the top of the detection plate can trigger the proximity switch A or the proximity switch B. A shift block corresponding to the front and rear of the detection plate is arranged on the C-axis scale ring, and a notch corresponding to the shift block is opened at the bottom of the support seat. The C-axis scale ring drives the shift block to rotate synchronously, so that the shift block can contact the bottom of the detection plate through the notch, and then the detection plate is rotated to cause the detection plate to trigger proximity switch A or proximity switch B.

[0007] The support seat, detection plate and reset spring mechanism described in the device form an annular pendulum needle structure. When the C-axis scale ring drives the shift block to rotate circumferentially, when the shift block contacts the detection plate, it can shift the detection plate to rotate at a small angle. At this time, the detection plate can trigger the proximity switch A or the proximity switch B. When the above-mentioned proximity switch senses and obtains the signal, the proximity switch is linked with the control system of the fully automatic universal milling head, so as to stop the operation of the C-axis. That is, the detection plate cooperates with the proximity switch A and the proximity switch B to play the limit protection function of the C-axis indexing limit position.

[0008] A further improvement of the present invention is that the support seat includes a circular ring body, a mounting plate is fixedly arranged on one side of the circular ring body close to the coupling body, the mounting plate is detachably connected to the side of the coupling body, and a gap is provided between the bottom side of the mounting plate and the bottom side of the circular ring body. The design of the support seat is reasonable, the overall structure is simple, and it is easy to assemble.

[0009] A further improvement of the present invention is that the annular body is detachably connected to the proximity switch A and the proximity switch B through the assembly hole, and the proximity switch A and the proximity switch B are tilted and symmetrically arranged. The detachable design of the annular body and the proximity switch A and the proximity switch B facilitates the staff to adjust the preset positive and negative angles, greatly improving the adaptability of the device.

[0010] A further improvement of the present invention is that the angle between the proximity switch A and the proximity switch B is an obtuse angle. The obtuse angle design between the proximity switch A and the proximity switch B is more reasonable and convenient for assembly and adjustment.

[0011] A further improvement of the present invention is that the detection plate includes a rectangular plate body, a bushing is provided at the axial position of the plate body, a countersunk hole corresponding to the bushing is provided on the mounting plate, the plate body is rotatably connected to the mounting plate through the bushing and the countersunk hole, and the bushing is axially connected and fixed by bolts. The design of the above detection plate is reasonable, easy to assemble and conducive to the rotation of the detection plate.

[0012] A further improvement of the present invention is that an arc-shaped end is arranged on the top of the plate body. The design of the arc-shaped end can avoid interference between the detection plate and the support seat when the detection plate rotates.

[0013] A further improvement of the present invention is that a stepped end is provided at the bottom of the plate body, and the stepped end is used to contact the shifting block. The design of the stepped end is conducive to the shifting block to shift the detection plate.

[0014] A further improvement of the present invention is that the return spring mechanism includes a return spring A and a return spring B, the top ends of the return spring A and the return spring B are arranged on both sides of the detection plate, the top ends of the return spring A and the return spring B are respectively detachably connected to the mounting plate, and the bottom ends of the return spring A and the return spring B are jointly detachably connected to the bottom of the detection plate. The overall structure of the return spring mechanism is simple and easy to assemble.

[0015] A further improvement of the present invention is that the angle between the reset spring A and the reset spring B is a right angle. The right angle design between the reset spring A and the reset spring B can more advantageously place the detection plate in a plumb bob position.

[0016] A further improvement of the present invention is that the shift block includes a shift rod and a base, the top of the shift rod is used to contact the step end, the bottom of the shift rod is vertically connected to the center position of the base, and the base is detachably connected to the C-axis scale ring. The above-mentioned shift block has a reasonable design and a simple structure, which can effectively reduce the difficulty of assembly.

[0017] The beneficial effects of the present invention are as follows: the design of the device is reasonable and the structure is simple. The support seat, the detection plate and the reset spring mechanism form an annular pendulum needle structure. Through the linkage of this structure and the proximity switch, the positive and negative limits of the C-axis are realized. In addition, a mechanical structure is adopted, which has strong anti-interference ability and high flexibility. It not only improves the protection effect of the C-axis indexing limit position limit, but also improves the reliability of the use of the fully automatic universal milling head. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention.

[0020] Figure 2 yes Figure 1 Schematic diagram of the structure of local A in the figure.

[0021] Figure 3 yes Figure 1 Horizontal cross-section of .

[0022] Figure 4 yes Figure 3 Schematic diagram of the structure of part B in the figure.

[0023] Figure 5 It is an activity trajectory diagram of the detection board of a specific embodiment of the present invention.

[0024] Figure 6 It is a schematic structural diagram of a support base according to a specific embodiment of the present invention.

[0025] Figure 7 It is a schematic diagram of the structure of a detection board according to a specific embodiment of the present invention.

[0026] Figure 8 It is a structural schematic diagram of a shift block according to a specific embodiment of the present invention.

[0027] In the figure: 1. Connecting body; 2. Support seat; 201. Ring body; 202. Mounting plate; 203. Notch; 3. Proximity switch A; 4. Proximity switch B; 5. Detection plate; 501. Plate body; 502. Arc end; 503. Step end; 6. Reset spring A; 7. Reset spring B; 8. Fixed straight tooth end gear disc; 9. Movable straight tooth end gear disc; 10. C-axis scale ring; 11. A-axis housing; 12. Shift block; 1201. Shift rod; 1202. Base; 13. Bushing. DETAILED DESCRIPTION

[0028] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0029] Embodiment 1, refer to Figure 1-5, combined with a specific embodiment, the following description is made: The C-axis limiting device of a fully automatic universal milling head described in the present invention includes a connecting body 1 and a C-axis scale ring 10. Combined with the existing fully automatic milling head, the C-axis scale ring 10 is fixed on the A-axis box 11, and the C-axis scale ring 10 is connected to the connecting body 1 through a movable spur tooth end gear disc 9 and a fixed spur tooth end gear disc 8.

[0030] An annular support seat 2 is arranged on the side of the coupling body 1, a rotatable detection plate 5 is arranged inside the support seat 2, and a reset spring mechanism is arranged between the detection plate 5 and the support seat 2. Under the action of the reset spring mechanism, the detection plate 5 can be in a plumb bob position.

[0031] Specifically, the return spring mechanism includes a return spring A6 and a return spring B7, the top ends of the return spring A6 and the return spring B7 are arranged on both sides of the detection plate 5, the top ends of the return spring A6 and the return spring B7 are respectively detachably connected to the mounting plate 202, the bottom ends of the return spring A6 and the return spring B7 are jointly detachably connected to the bottom of the detection plate 5, and the angle between the return spring A6 and the return spring B7 is a right angle. The overall structure of the return spring mechanism is simple and easy to assemble, and the right angle design between the return spring A6 and the return spring B7 can more advantageously place the detection plate 5 in a plumb position.

[0032] The top of the support seat 2 is provided with a proximity switch A3 and a proximity switch B4 located on both sides of the detection plate 5, and the proximity switch A3 and the proximity switch B4 are electrically connected to the control system of the fully automatic universal milling head. The proximity switch A3 and the proximity switch B4 cooperate with the detection plate 5, and when the detection plate 5 rotates, the top thereof can trigger the proximity switch A3 or the proximity switch B4. The C-axis scale ring 10 is provided with a shift block 12 corresponding to the front and rear of the detection plate 5, and the bottom of the support seat 2 is provided with a notch 203 corresponding to the shift block 12. The C-axis scale ring 10 drives the shift block 12 to rotate synchronously, so that the shift block 12 can contact the bottom of the detection plate 5 through the notch 203, and then the detection plate 5 is rotated, so that the detection plate 5 triggers the proximity switch A3 or the proximity switch B4.

[0033] The support seat 2, detection plate 5 and reset spring mechanism described in the present device form an annular pendulum needle structure. When the C-axis scale ring 10 drives the shift block 12 to rotate circumferentially, when the shift block 12 contacts the detection plate 5, it can shift the detection plate 5 to rotate at a small angle. At this time, the detection plate 5 can trigger the proximity switch A3 or the proximity switch B4. After the above-mentioned proximity switch senses and obtains the signal, the proximity switch is linked with the control system of the fully automatic universal milling head, so as to stop the operation of the C-axis. That is, the detection plate 5 cooperates with the proximity switch A3 and the proximity switch B4 to play the limit protection function of the C-axis indexing limit position.

[0034] Working principle of the present invention: Under normal conditions, when the C-axis of the fully automatic universal milling head is at the 0 degree position, the shift block 12 is at the C0 position of the C-axis scale ring 10, and the detection plate 5 is at the C180 position of the C-axis scale ring 10. The detection plate 5 is in the plumb bob position under the action of the reset spring mechanism.

[0035] The C-axis of the fully automatic universal milling head performs a relaxation action. When the C-axis indexes from 0 degrees to 180 degrees in the positive direction, the shift block 12 rotates synchronously with the C-axis scale ring 10. After rotating for a certain distance, the shift block 12 begins to contact the detection plate 5. At this time, the C-axis continues to rotate from 180 degrees in the positive direction to 185 degrees. In this process, the shift block 12 rotates the detection plate 5 and causes the detection plate 5 to trigger the proximity switch A3. When the proximity switch A3 senses the signal, the proximity switch A3 is linked with the control system of the fully automatic universal milling head to stop the C-axis. That is, the proximity switch A3 can be axially adjusted to reach the preset positive 185° sensing signal, thereby realizing the positive 185-degree limit of the C-axis.

[0036] The C-axis of the fully automatic universal milling head performs a relaxation action. When the C-axis is indexed from 0 degrees to 180 degrees in the negative direction, the shift block 12 rotates synchronously with the C-axis scale ring 10. After rotating for a certain distance, the shift block 12 begins to contact the detection plate 5. At this time, the C-axis continues to rotate from 180 degrees in the negative direction to 185 degrees. In this process, the shift block 12 rotates the detection plate 5 and causes the detection plate 5 to trigger the proximity switch B4. When the proximity switch B4 senses the signal, the proximity switch B4 is linked with the control system of the fully automatic universal milling head to stop the C-axis. That is, the proximity switch B4 can be axially adjusted to reach the preset negative 185° sensing signal, thereby realizing the negative 185° limit of the C-axis.

[0037] Example 2, refer to Figure 6 On the basis of the first embodiment, the support seat 2 includes a circular ring body 201, a mounting plate 202 is fixedly arranged on one side of the circular ring body 201 close to the coupling body 1, the mounting plate 202 is detachably connected to the side of the coupling body 1, and a notch 203 is provided between the bottom side of the mounting plate 202 and the bottom side of the circular ring body 201. The support seat 2 is reasonably designed, has a simple overall structure, and is easy to assemble.

[0038] Specifically, the annular body 201 is detachably connected to the proximity switch A3 and the proximity switch B4 through the assembly hole, and the proximity switch A3 and the proximity switch B4 are tilted and symmetrically arranged, and the angle between the proximity switch A3 and the proximity switch B4 is an obtuse angle. The above-mentioned detachable design of the annular body 201 and the proximity switch A3 and the proximity switch B4 facilitates the staff to adjust the preset positive and negative angles, greatly improving the adaptability of the device, and the obtuse angle design between the proximity switch A3 and the proximity switch B4 is more reasonable, which is convenient for assembly and adjustment.

[0039] Example 3, refer to Figure 7 On the basis of the second embodiment, the detection plate 5 includes a rectangular plate body 501, the top of the plate body 501 is provided with an arc-shaped end 502, and the bottom of the plate body 501 is provided with a stepped end 503, and the stepped end 503 is used to contact the shift block 12. A T-shaped bushing 13 is provided at the axial position of the plate body 501, and a countersunk hole corresponding to the bushing 13 is provided on the mounting plate 202. The plate body 501 is rotatably connected to the mounting plate 202 through the bushing 13 and the countersunk hole, and the bushing 13 is axially connected and fixed by bolts. Through the design of the detection plate 5, the shift block 12 can better shift the detection plate 5, thereby ensuring that the detection plate 5 moves smoothly.

[0040] Embodiment 4, referring to Figure 8 On the basis of the third embodiment, the shift block 12 includes a shift rod 1201 and a base 1202. The top of the shift rod 1201 is used to contact the step end 503. The bottom of the shift rod 1201 is vertically connected to the center of the base 1202. The base 1202 is detachably connected to the C-axis scale ring 10. The above-mentioned shift block 12 has a reasonable design and a simple structure, which can effectively reduce the difficulty of assembly.

[0041] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0042] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0043] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fully automatic universal milling head C-axis limit device, comprising a coupling body (1) and a C-axis scale ring (10), wherein the C-axis scale ring (10) is fixed to an A-axis housing (11), and the C-axis scale ring (10) is connected to the coupling body (1) via a movable spur gear disc (9) and a fixed spur gear disc (8), characterized in that: An annular support seat (2) is arranged on the side of the coupling body (1), a rotatable detection plate (5) is arranged inside the support seat (2), and a return spring mechanism is arranged between the detection plate (5) and the support seat (2); a proximity switch A (3) and a proximity switch B (4) are arranged on the top of the support seat (2) and are located on both sides of the detection plate (5); the proximity switch A (3) and the proximity switch B (4) are electrically connected to the control system of the fully automatic universal milling head; the proximity switch A (3) and the proximity switch B (4) cooperate with the detection plate (5), and when the detection plate (5) rotates When the detection plate (5) is moved, its top can trigger the proximity switch A (3) or the proximity switch B (4); a shifting block (12) corresponding to the front and rear of the detection plate (5) is arranged on the C-axis scale ring (10), and a notch (203) corresponding to the shifting block (12) is opened at the bottom of the support seat (2); the C-axis scale ring (10) drives the shifting block (12) to rotate synchronously, so that the shifting block (12) can contact the bottom of the detection plate (5) through the notch (203), thereby shifting the detection plate (5) to rotate, so that the detection plate (5) triggers the proximity switch A (3) or the proximity switch B (4).

2. The fully automatic universal milling head C-axis limiting device according to claim 1 is characterized in that: The support seat (2) comprises a circular ring body (201), a mounting plate (202) being fixedly arranged on one side of the circular ring body (201) close to the connecting body (1), the mounting plate (202) being detachably connected to the side surface of the connecting body (1), and a notch (203) being provided in the portion between the bottom side of the mounting plate (202) and the bottom side of the circular ring body (201).

3. The fully automatic universal milling head C-axis limiting device according to claim 2 is characterized in that: The annular body (201) is detachably connected to the proximity switch A (3) and the proximity switch B (4) through the assembly hole, and the proximity switch A (3) and the proximity switch B (4) are arranged obliquely and symmetrically.

4. The fully automatic universal milling head C-axis limiting device according to claim 3 is characterized in that: The angle between the proximity switch A (3) and the proximity switch B (4) is an obtuse angle.

5. The fully automatic universal milling head C-axis limiting device according to claim 4 is characterized in that: The detection plate (5) comprises a rectangular plate body (501), a bushing (13) is arranged at the axial center position of the plate body (501), a countersunk hole corresponding to the bushing (13) is opened on the mounting plate (202), the plate body (501) is rotatably connected to the mounting plate (202) via the bushing (13) and the countersunk hole, and the bushing (13) is axially connected and fixed by bolts.

6. The fully automatic universal milling head C-axis limiting device according to claim 5 is characterized in that: The top of the plate body (501) is provided with an arc-shaped end (502).

7. The fully automatic universal milling head C-axis limiting device according to claim 6 is characterized in that: A stepped end (503) is provided at the bottom of the plate body (501), and the stepped end (503) is used to contact the shifting block (12).

8. The fully automatic universal milling head C-axis limiting device according to claim 7 is characterized in that: The return spring mechanism comprises a return spring A (6) and a return spring B (7), the top ends of the return spring A (6) and the return spring B (7) are arranged on both sides of the detection plate (5), the top ends of the return spring A (6) and the return spring B (7) are respectively detachably connected to the mounting plate (202), and the bottom ends of the return spring A (6) and the return spring B (7) are detachably connected to the bottom of the detection plate (5).

9. The fully automatic universal milling head C-axis limiting device according to claim 8, characterized in that: The included angle between the return spring A (6) and the return spring B (7) is a right angle.

10. The fully automatic universal milling head C-axis limiting device according to claim 9, characterized in that: The shift block (12) comprises a shift rod (1201) and a base (1202), the top of the shift rod (1201) is used to contact the step end (503), the bottom of the shift rod (1201) is vertically connected to the center position of the base (1202), and the base (1202) is detachably connected to the C-axis scale ring (10).

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