Five-axis cradle rotary table

Abstract

The utility model provides a five-axis cradle rotary table, and belongs to the technical field of machine tool equipment. The problem that an existing five-axis cradle rotary table is insufficient in use safety is solved. The five-axis cradle rotary table comprises a main box body, an auxiliary box body and a rotary table body, a main motor is installed in the main box body, a transition piece is fixed between a rotor of the main motor and the rotary table body, a brake pad is fixed to the transition piece, a brake disc and a hydraulic cylinder are fixed to the positions, located on the two sides of the brake pad, in the main box body respectively, and a piston of the hydraulic cylinder can tightly press the brake pad on the brake disc. A sliding hole is formed in the brake disc in the axial direction, a mounting hole communicated with the sliding hole is formed in the outer side face of the brake disc, a position sensor is fixed in the mounting hole, a piston of the hydraulic cylinder is fixedly connected with an induction rod, and the induction rod is inserted into the sliding hole and can slide in the sliding hole. And when the piston of the hydraulic cylinder presses the brake pad on the brake disc, the sensing rod can be sensed by the position sensor. According to the five-axis cradle rotary table, the use safety can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of machine tool equipment and relates to a five-axis cradle turntable. Background Art

[0002] High-grade CNC machine tools have multifunctional characteristics such as high speed, high precision, intelligence, compounding, five-axis linkage, and Internet communication. Their development level is an important symbol of a country's modern industrialization. Among them, five-axis machining center machine tools are a type of high-grade CNC machine tools, which can perform five-axis linkage machining and can machine precision and complex parts. They are mainly applied in industries such as aerospace, military, high-precision medical devices, tool manufacturing, and mold manufacturing.

[0003] A five-axis machining center machine tool is provided with a five-axis cradle turntable to achieve five-axis linkage. For example, a five-axis cradle turntable [publication number: CN 116538218A] proposed in the Chinese patent literature includes a C-axis rotary unit and two A-axis rotary units. The C-axis rotary unit is arranged in the middle, and the two A-axis rotary units are symmetrically arranged on both sides of the bridge plate. When the C-axis torque motor works normally, the turntable workbench rotates around the C-axis. When the C-axis braking mechanism works, the turntable workbench stops rotating. When the two A-axis torque motors work synchronously, the A-axis drive shafts on both sides rotate, and then drive the bridge plate of the cradle turntable to rotate around the A-axis, thereby realizing the swing angle movement. When it is necessary to stop the rotation on both sides of the bridge plate, the A-axis braking mechanism works. The A-axis braking mechanism includes an A-axis brake plate fixing seat, which is circumferentially fixed on the A-axis drive shaft, and an A-axis brake pad is circumferentially fixed thereon. The A-axis brake pad extends to one side of the A-axis bushing, and an axially movable A-axis brake piston is arranged along the axial direction of the A-axis bushing, so that when the A-axis brake piston moves axially, it can clamp the A-axis brake pad between the two and the A-axis bushing to form braking. Another five-axis cradle turntable [publication number: CN110682114A] is also disclosed in the Chinese patent literature, in which a brake piston is also provided to perform braking and release braking through the bidirectional sliding of the brake piston.

[0004] In the braking mechanism of the above five-axis cradle turntable, when a hydraulic failure (such as a solenoid valve failure in the oil circuit) occurs, resulting in the inability to drive the brake piston to release the brake or perform braking, the five-axis machining center machine tool will still perform subsequent processing operations, which is likely to cause safety accidents. Summary of the Utility Model

[0005] The purpose of the utility model is to address the above problems existing in the prior art and propose a five-axis cradle turntable, and the technical problem to be solved is how to improve the safety of use.

[0006] The purpose of the utility model can be achieved by the following technical solutions:

[0007] A five-axis cradle turntable, comprising a main housing, a secondary housing, and a turntable connected between the main housing and the secondary housing. A main motor is installed in the main housing. A transition member is fixedly connected between the rotor of the main motor and the turntable. A brake pad is fixedly connected to the transition member. A brake disc and a hydraulic cylinder are respectively fixed on both sides of the brake pad in the main housing. The piston of the hydraulic cylinder can press the brake pad against the brake disc. It is characterized in that a sliding hole is axially formed on the end face of the brake disc facing the hydraulic cylinder, and a mounting hole communicating with the sliding hole is formed on the outer side face of the brake disc. A position sensor is fixed in the mounting hole. An induction rod located on the outer peripheral side of the brake pad is fixedly connected to the piston of the hydraulic cylinder. The induction rod is inserted into the sliding hole and can slide in the sliding hole. When the piston of the hydraulic cylinder presses the brake pad against the brake disc, the induction rod can be sensed by the position sensor.

[0008] The position sensor is electrically connected to the control panel of the five-axis machining center machine tool. The hydraulic cylinder is connected to the hydraulic source through a pipeline. An electromagnetic valve is provided on the pipeline, and the electromagnetic valve is electrically connected to the control panel. During normal braking, the control panel issues a braking command, the electromagnetic valve acts to allow hydraulic oil to enter the hydraulic cylinder, the piston in the hydraulic cylinder moves towards the brake pad to press the brake pad against the brake disc, fixing the transition member on the main housing, thereby braking the rotor of the main motor and the turntable. During the normal braking process, the induction rod fixed to the piston of the hydraulic cylinder slides synchronously into the sliding hole. When the piston of the hydraulic cylinder presses the brake pad against the brake disc, the induction rod is sensed by the position sensor, and the position sensor sends a braking-in-place signal to the control panel. After receiving the braking-in-place signal, the control panel continues to control the machine tool to perform subsequent processing. When a failure causes the hydraulic cylinder to be unable to admit oil, after the control panel of the machine tool issues a braking command, the piston of the hydraulic cylinder does not move, and the induction rod thereon also does not move, resulting in the induction rod not being sensed by the position sensor, and the position sensor will not send a braking-in-place signal to the control panel of the machine tool, that is, after the control panel of the machine tool issues a braking command, it does not receive a braking-in-place signal, and the machine tool does not perform subsequent processing steps, avoiding the occurrence of safety accidents. Therefore, the safety of use of this five-axis cradle turntable can be improved.

[0009] In the above five-axis cradle turntable, a mounting cylinder is sleeved and fixed outside the position sensor. A protruding convex ring is provided on the outer side face of the mounting cylinder, and a shoulder is provided on the hole wall surface of the mounting hole. The mounting cylinder is inserted into the mounting hole and the convex ring abuts against the shoulder. The setting of the mounting cylinder facilitates the assembly of the position sensor in the brake disc, and the cooperation of the convex ring and the shoulder has an axial positioning effect on the mounting cylinder, making the position of the position sensor in the mounting hole accurate, so as to more accurately sense the position change of the induction rod.

[0010] In the above-mentioned five-axis cradle turntable, a locking hole is further provided on the end face of the brake disc facing the hydraulic cylinder. A locking screw is threadedly connected in the locking hole, and the bottom end of the locking screw abuts against the outer side surface of the mounting cylinder. When assembling the position sensor, connect the position sensor to the mounting cylinder, then insert the mounting cylinder into the mounting hole so that the convex ring abuts against the shoulder, and then tighten the locking screw to fix the mounting cylinder and the brake disc, and the position sensor can be fixed. By fixing the mounting cylinder with the locking screw, the assembly of the position sensor is convenient.

[0011] In the above-mentioned five-axis cradle turntable, the mounting hole is arranged in the up-down direction. An assembly hole corresponding to the mounting hole is provided on the top surface of the main housing. The mounting cylinder can pass through the assembly hole, and a detachable plug cap is fixedly connected in the assembly hole. After removing the plug cap, the position sensor and the mounting cylinder can be placed into the mounting hole through the assembly hole, making the assembly of the position sensor convenient. After the position sensor is installed, fix the plug cap back into the assembly hole to prevent foreign objects from entering the mounting hole and affecting the accuracy of the position sensor's operation.

[0012] In the above-mentioned five-axis cradle turntable, a wire-passing joint is fixed on the plug cap, and the wire of the position sensor extends out from the wire-passing joint. After the wire of the position sensor extends out from the wire-passing joint, it is connected to the control panel of the machine tool to achieve signal transmission.

[0013] Compared with the prior art, the present utility model has the following advantages:

[0014] An induction rod is fixed on the piston of the hydraulic cylinder, and a position sensor is fixed on the brake disc. When braking after the control panel issues a braking command, when the piston of the hydraulic cylinder slides to press the brake pads against the brake disc, the induction rod moves into the sliding hole and is sensed by the position sensor. When a hydraulic failure causes the piston of the hydraulic cylinder not to move, the induction rod will not be sensed by the position sensor, thus avoiding safety accidents caused by the failure to achieve braking after the control panel of the machine tool issues a braking command, and improving the safety of use. Description of the Drawings

[0015] Figure 1 is a sectional view of the present five-axis cradle turntable.

[0016] Figure 2 is Figure 1 the enlarged view of part A in

[0017] In the figure, 1 is the main housing; 1a is the assembly hole; 2 is the auxiliary housing; 3 is the turntable; 4 is the main motor; 5 is the auxiliary motor; 6 is the transition piece; 6a is the intermediate disk; 6b is the connecting disk; 7 is the brake pad; 8 is the brake disk; 8a is the sliding hole; 8b is the mounting hole; 8b1 is the shoulder; 8c is the locking hole; 8d is the locking screw; 9 is the hydraulic cylinder; 9a is the cylinder block; 9b is the piston; 10 is the position sensor; 10a is the wire; 11 is the sensing rod; 12 is the mounting cylinder; 12a is the convex ring; 13 is the plug cap; 14 is the wire threading joint. Detailed implementation manners

[0018] The following are specific embodiments of the present utility model and, in combination with the accompanying drawings, further describe the technical solutions of the present utility model, but the present utility model is not limited to these embodiments.

[0019] As Figure 1 shown, a five-axis cradle turntable includes a main housing 1, an auxiliary housing 2, and a turntable 3 connected between the main housing 1 and the auxiliary housing 2. The main housing 1 is located on the left side of the turntable 3, and the auxiliary housing 2 is located on the right side of the turntable 3. A main motor 4 is installed in the main housing 1. The stator of the main motor 4 is fixedly connected to the main housing 1, and the rotor of the main motor 4 is arranged in the stator of the main motor 4. A bearing support disk is fixed on the left end of the main housing 1. The left end of the rotor of the main motor 4 is fixedly connected to an A-axis. The left end of the A-axis is arranged in the bearing support disk, and a first bearing is provided between the left end of the A-axis and the bearing support disk. A transition piece 6 is fixedly connected between the right end of the rotor of the main motor 4 and the turntable 3. The transition piece 6 includes an intermediate disk 6a and a connecting disk 6b that are fixedly separated. Both ends of the intermediate disk 6a are respectively fixed to the rotor of the main motor 4 and the connecting disk 6b. Both ends of the connecting disk 6b are respectively fixed to the intermediate disk 6a and the turntable 3. A second bearing is provided between the intermediate disk 6a and the main housing 1. Such an arrangement makes the components in the main housing 1 compactly arranged and the rotation of the A-axis stable.

[0020] As Figure 1 shown, an auxiliary motor 5 is installed in the auxiliary housing 2. The stator of the auxiliary motor 5 is fixedly connected to the auxiliary housing 2, and the rotor of the auxiliary motor 5 is arranged in the stator of the auxiliary motor 5. The left end of the rotor of the auxiliary motor 5 is fixedly connected to a left disk. The left disk is fixedly connected to the turntable 3, and a third bearing is provided between the left disk and the auxiliary housing 2. The right end of the auxiliary housing 2 is fixedly connected to an auxiliary support disk. The right end of the rotor of the auxiliary motor 5 is fixedly connected to an auxiliary shaft. The auxiliary shaft is arranged in the auxiliary support disk, and a fourth bearing is provided between the auxiliary shaft and the auxiliary support disk. The right end of the auxiliary shaft extends out of the auxiliary support disk and is also fixedly connected to a motor encoder. Such an arrangement makes the components in the auxiliary housing 2 compactly arranged and the rotation of the auxiliary shaft stable. In addition, the components in the auxiliary housing 2 and the components in the main housing 1 are substantially symmetrically arranged, making the rotation of the turntable 3 stable.

[0021] As Figure 2As shown, a brake pad 7 is fixedly connected to the transition piece 6, and the brake pad 7 is fixedly connected to the right end face of the intermediate disc 6a. Inside the main housing 1, a brake disc 8 and a hydraulic cylinder 9 are respectively fixed on both sides of the brake pad 7, and the brake disc 8 is located between the second bearing and the hydraulic cylinder 9. On the left end face of the outer side of the connecting disc 6b, there is a receiving groove, and the right end of the hydraulic cylinder 9 is embedded in the receiving groove. The hydraulic cylinder 9 includes a cylinder block 9a fixedly connected inside the main housing 1 and a piston 9b that can axially move inside the cylinder block 9a. The piston 9b can press the brake pad 7 against the brake disc 8. On the outer side surface of the piston 9b, there is a protruding force-receiving ring. There is an oil chamber between the right end face of the force-receiving ring and the cylinder block 9a. An oil inlet hole communicating with the oil chamber is provided on the cylinder block 9a, and the oil inlet hole is not shown in the figure. A groove is provided on the left end face of the cylinder block 9a, and a protruding boss is provided on the right end face of the brake disc 8. The boss is embedded in the groove. The brake pad 7 is located between the boss and the piston 9b. When the piston 9b moves leftward and abuts against the brake pad 7, the brake pad 7 can be pressed against the boss. The cooperation among the second bearing, the brake disc 8, the brake pad 7, the hydraulic cylinder 9, and the transition piece 6 is compact and the work is stable.

[0022] As Figure 2As shown, a sliding hole 8a is axially formed on the end face of the boss, and a mounting hole 8b communicating with the sliding hole 8a is formed on the outer side surface of the brake disc 8. The mounting hole 8b is perpendicular to the sliding hole 8a, and a position sensor 10 is fixed in the mounting hole 8b. The position sensor 10 is a proximity switch, which can be an electromagnetic sensor, an optoelectronic sensor or a Hall sensor. The position sensor 10 is an existing product and can be directly purchased on the market. An induction rod 11 located on the outer peripheral side of the brake pad 7 is fixedly connected to the piston 9b of the hydraulic cylinder 9. The induction rod 11 is inserted into the sliding hole 8a and can slide in the sliding hole 8a. When the piston 9b of the hydraulic cylinder 9 presses the brake pad 7 against the brake disc 8, the induction rod 11 can be sensed by the position sensor 10. The induction rod 11 is generally made of stainless steel and has a stable structure. An installation cylinder 12 is sleeved and fixed outside the position sensor 10, and the sensing head of the position sensor 10 extends out of the installation cylinder 12 and faces the sliding hole 8a. A protruding convex ring 12a is provided on the outer side surface of the installation cylinder 12, and a shoulder 8b1 is provided on the hole wall surface of the mounting hole 8b. The installation cylinder 12 is inserted and fixed in the mounting hole 8b and the convex ring 12a abuts against the shoulder 8b1. A locking hole 8c corresponding to the position of the mounting hole 8b is further formed on the right end face of the brake disc 8 on the outer peripheral side of the boss. A locking screw 8d is threadedly connected in the locking hole 8c, and the bottom end of the locking screw 8d abuts against the outer side surface of the installation cylinder 12 to fix the installation cylinder 12 in the mounting hole 8b. The mounting hole 8b is arranged in the up and down direction, and an assembly hole 1a corresponding to the mounting hole 8b is formed on the top surface of the main box body 1. The minimum aperture of the assembly hole 1a is larger than the maximum aperture of the mounting hole 8b. The installation cylinder 12 can pass through the assembly hole 1a, and a detachable plug 13 is fixedly connected to the outer hole edge of the assembly hole 1a. A screw is connected to the outer edge of the plug 13, and the plug 13 is fixedly connected to the main box body 1 through the screw. A wire passing hole is provided at the center of the plug 13, and a wire passing joint 14 is fixed in the wire passing hole. The wire 10a of the position sensor 10 extends out of the wire passing joint 14.

[0023] The position sensor 10 is electrically connected to the control panel of the five-axis machining center machine tool. The hydraulic cylinder 9 is connected to the hydraulic source through a pipeline, and a solenoid valve is arranged on the pipeline. The solenoid valve is electrically connected to the control panel. During normal braking, the control panel issues a braking command, and the solenoid valve acts to allow hydraulic oil to enter the hydraulic cylinder 9. The piston 9b in the hydraulic cylinder 9 moves towards the brake pad 7 to press the brake pad 7 against the brake disc 8, thereby braking the rotor of the main motor 4 and the turntable 3. During the normal braking process, the induction rod 11 fixed to the piston 9b of the hydraulic cylinder 9 slides synchronously into the sliding hole 8a. When the piston 9b of the hydraulic cylinder 9 presses the brake pad 7 against the brake disc 8, the induction rod 11 is sensed by the position sensor 10, and the position sensor 10 sends a braking-in-place signal to the control panel. After receiving the braking-in-place signal, the control panel continues to control the machine tool to perform subsequent machining. When a failure causes the hydraulic cylinder 9 to be unable to admit oil, after the machine tool control panel issues a braking command, the piston 9b of the hydraulic cylinder 9 does not move, and the induction rod 11 thereon also does not move, resulting in the induction rod 11 not being sensed by the position sensor 10, and the position sensor 10 will not send a braking-in-place signal to the machine tool control panel. That is, after the machine tool control panel issues a braking command, it does not receive a braking-in-place signal, and the machine tool does not perform subsequent machining steps, thus avoiding the occurrence of safety accidents. Therefore, this five-axis cradle turntable can improve the safety of use.

[0024] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A five-axis cradle turntable, comprising a main box body (1), a sub-box body (2), and a turntable (3) connected between the main box body (1) and the sub-box body (2). A main motor (4) is installed in the main box body (1). A transition member (6) is fixedly connected between the rotor of the main motor (4) and the turntable (3). A brake pad (7) is fixedly connected to the transition member (6). A brake disc (8) and a hydraulic cylinder (9) are respectively fixed on both sides of the brake pad (7) in the main box body (1). A piston (9b) of the hydraulic cylinder (9) can press the brake pad (7) against the brake disc (8), characterized in that, A sliding hole (8a) is axially formed on the end face of the brake disc (8) facing the hydraulic cylinder (9). An installation hole (8b) communicating with the sliding hole (8a) is formed on the outer side face of the brake disc (8). A position sensor (10) is fixed in the installation hole (8b). An induction rod (11) located on the outer peripheral side of the brake pad (7) is fixedly connected to the piston (9b) of the hydraulic cylinder (9). The induction rod (11) is inserted into the sliding hole (8a) and can slide in the sliding hole (8a). When the piston (9b) of the hydraulic cylinder (9) presses the brake pad (7) against the brake disc (8), the induction rod (11) can be sensed by the position sensor (10).

2. The five-axis cradle turntable according to claim 1, characterized in that, An installation cylinder (12) is sleeved and fixed outside the position sensor (10). A protruding convex ring (12a) is provided on the outer side face of the installation cylinder (12). A shoulder (8b1) is provided on the hole wall surface of the installation hole (8b). The installation cylinder (12) is inserted into the installation hole (8b) and the convex ring (12a) abuts against the shoulder (8b1).

3. The five-axis cradle turntable according to claim 2, wherein, A locking hole (8c) is further formed on the end face of the brake disc (8) facing the hydraulic cylinder (9). A locking screw (8d) is threadedly connected in the locking hole (8c). The bottom end of the locking screw (8d) abuts against the outer side face of the installation cylinder (12).

4. The five-axis cradle turntable according to claim 2 or 3, characterized in that, The installation hole (8b) is arranged in the up-and-down direction. An assembly hole (1a) corresponding to the installation hole (8b) is formed on the top face of the main box body (1). The installation cylinder (12) can pass through the assembly hole (1a). A detachable plug cap (13) is fixedly connected in the assembly hole (1a).

5. The five-axis cradle turntable according to claim 4, wherein, A wire passing joint (14) is fixed on the plug cap (13). The wire (10a) of the position sensor (10) extends out from the wire passing joint (14).

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