CN112605671B - Vertical-horizontal conversion swinging head structure with hollow core shaft and direct drive - Google Patents

Abstract

The invention provides a core shaft hollow direct drive type vertical-horizontal conversion swing head structure, which is simple and compact in structure, high in precision, easy to install and maintain, and convenient for pipes and cables to pass through. It includes a main shaft, a main shaft fixing part, a housing and a hollow mandrel; the hollow mandrel is arranged in the inner cavity of the housing through bearing rotation, and the connecting end of the hollow mandrel is coaxially fixed with a connecting plate; the hollow mandrel and A torque motor for driving the rotation of the hollow mandrel is arranged between the housings; the bearings are rolling bearings, the inner ring is fixedly connected to the connection plate, and the outer ring is fixedly connected to the housing; the lower part of the main shaft is provided with a cutter head, the main shaft fixedly arranged on the main shaft fixing part; one side of the main shaft fixing part is fixed with the connecting plate; the joint surface of the housing and the axis of the main shaft are arranged in vertical and horizontal conversion with the axis of the hollow mandrel, and the cutter head The tip point of the tool is located on the axis of the hollow mandrel.

Description

A core shaft hollow direct-drive vertical-horizontal conversion swing head structure

technical field

The invention relates to an oscillating head structure, in particular to a hollow core shaft direct-drive type vertical-horizontal conversion oscillating head structure.

Background technique

With the continuous development and progress of modern manufacturing industry, the requirements for manufacturing precision and production efficiency are getting higher and higher. At present, the use of vertical and horizontal automatic switching swing heads is the most advanced and fastest way, which can achieve a very high vertical and horizontal conversion rate. and efficiency, thereby improving the adaptability of the entire machining process, and the vertical-horizontal conversion swing head is the core component of the vertical-horizontal conversion turning-milling compound machining center.

However, in the traditional vertical-horizontal conversion swing head, the radial bearing and the thrust bearing are designed separately. The radial and axial connectors are designed separately, and the structure is complicated; secondly, the traditional vertical-horizontal conversion swing head is connected by a deceleration structure. Servo motor and swing head, due to the backlash of the reduction mechanism, the positioning accuracy and repeat positioning accuracy are poor; finally, in the traditional vertical-horizontal conversion swing head, the pipeline and cables of the main shaft are often exposed outside the entire swing head. When switching to swing processing, it is inconvenient to pay attention to whether the pipes and cables will interfere with the processing area.

Contents of the invention

Aiming at the problems existing in the prior art, the present invention provides a hollow mandrel direct-drive vertical-horizontal conversion swing head structure, which is simple and compact in structure, high in precision, easy to install and maintain, and convenient for pipes and cables to pass through.

The present invention is achieved through the following technical solutions:

A mandrel hollow direct drive type vertical-horizontal conversion swing head structure, including a main shaft, a main shaft fixing part, a shell and a hollow mandrel;

The hollow mandrel is installed in the inner cavity of the housing through bearing rotation, and the connecting end of the hollow mandrel is coaxially fixed with a connecting plate; a torque motor for driving the hollow mandrel to rotate is arranged between the hollow mandrel and the housing ;

The bearing is a rolling bearing, the inner ring is fixedly connected to the connection plate, and the outer ring is fixedly connected to the housing;

The lower part of the main shaft is provided with a cutter head, and the main shaft is fixedly arranged on the main shaft fixing part; one side of the main shaft fixing part is fixed with the connection plate;

The joint surface of the housing and the axis of the main shaft are arranged vertically and horizontally with the axis of the hollow mandrel, and the tip point of the cutter head is located on the axis of the hollow mandrel.

Preferably, the torque motor includes a torque motor stator and a torque motor rotor; a water jacket is arranged in the inner cavity of the housing, and the water jacket is pressed into the inner cavity of the housing by the stator gland; the torque motor stator is provided with In the inner hole of the water jacket, the torque motor rotor is fixed on the hollow mandrel flange on the outer wall of the hollow mandrel.

Further, it also includes a brake thin sleeve and a brake fixing piece;

The brake fixing part is fixed on the stator gland, and the brake fixing part is provided with an oil hole;

The brake thin sleeve is fixed on the inner side of the brake fixing part, and the outer circle of the brake thin sleeve is provided with an annular oil chamber, the two ends of the annular oil chamber are provided with sealing rings, and the oil hole is connected to the annular oil chamber; There is a gap between the inner hole of the thin brake sleeve and the journal of the hollow mandrel.

Further, it also includes a circular grating and a circular grating reading head; the circular grating is fixed on the step at the shaft end of the hollow mandrel; the circular grating reading head is fixed on the brake fixing part through a bracket.

Further, it also includes a travel switch striker and a travel switch; the travel switch striker is fixed on the end face of the hollow mandrel shaft end; the travel switch is fixed on the brake fixing part through a bracket.

Preferably, the main shaft fixing part is further provided with a threading hole and a hollow slot communicating with the inside of the hollow mandrel.

Preferably, a counterweight is provided on the other side of the main shaft fixing member opposite to the main shaft.

Preferably, the free end of the hollow mandrel is provided with a shield fixedly connected with the housing.

Preferably, the hollow mandrel is provided with a bush made of wear-resistant soft material.

Preferably, a lip sealing ring is provided at the junction of the housing and the connection plate.

Compared with the prior art, the present invention has the following beneficial technical effects:

The invention discloses a mandrel hollow direct-drive type vertical-horizontal conversion swing head structure. The hollow mandrel is used as the swing shaft, and the vertical and horizontal positions are converted by using a radial and thrust-combined rolling bearing and the main shaft as the swing head. Compared with the case where the traditional radial bearing and thrust bearing are designed separately, the design is simpler, the structure is more compact, and the installation and maintenance are more convenient; moreover, the hollow mandrel is used, because the mandrel is hollow, which is convenient for pipes and cables to pass through. Compared with the traditional pipes and cables, the pipes and cables are directly swayed and exposed outside the entire swing head, so that the pipes and cables of the main shaft are far away from the processing area, and the performance is reliable and safe; The sharp point is located on the axis of the hollow mandrel, and the point of the tool point remains unchanged during the vertical-horizontal conversion process; at the same time, the direct drive of the torque motor is used to make the swing head high in precision and compact in structure.

Furthermore, the present invention adopts a torque motor direct drive structure, which has higher positioning accuracy and repeat positioning accuracy than the traditional servo motor acceleration and deceleration mechanism.

Further, the present invention facilitates the braking control of the pendulum shaft by arranging the structure of the brake thin sleeve and the brake fixing member. When the annular oil chamber of the brake thin sleeve is passed into a high-pressure fluid medium, the brake thin sleeve is deformed and tightened. The outer circle of the hollow mandrel realizes the braking of the pendulum.

Further, the present invention uses the circular grating signal to realize the closed-loop control of the pendulum shaft, which can effectively improve the machining accuracy.

Further, the present invention adopts the structure of the travel switch bumper and the travel switch, without manual control, and the travel switch signal can be used for the positive and negative travel limit and the origin of the pendulum shaft.

Further, the present invention adopts the method of setting threading holes and empty slots on the main shaft fixing part, which facilitates the main shaft pipe and cables to pass through the swing shaft, so that the cables will not affect the swing of the swing head; Heavy block, to reduce the gravitational unbalanced moment burden of the main shaft.

Further, the present invention arranges a bushing in the hollow mandrel, and the material of the bushing is a wear-resistant soft material, so that the cables and pipes in the hollow mandrel are in contact with the bushing instead of directly contacting the hollow mandrel, thereby When swinging the head, it can ensure that the cables and pipes will not be scratched.

Further, the present invention can effectively ensure the sealing of the front end of the pendulum shaft and prevent pollutants such as dust and cutting fluid from entering by providing a lip-shaped sealing ring at the junction of the housing and the connection plate.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the A-A direction sectional view of Fig. 1;

Fig. 3 is the rotation view of direction B in Fig. 2;

Fig. 4 is a partial sectional view of C-C direction in Fig. 3;

Fig. 5 is a partial cross-sectional view of D-D direction in Fig. 3;

FIG. 6 is a partial enlarged view at E in FIG. 2 .

In the figure: 1. Main shaft, 2. Main shaft fixing part, 2-1. Screw hole, 2-2. Threading hole, 2-3. Inner hole of the ring surface, 2-4. Connecting surface, 2-5. Empty slot , 3. Shell, 3-1. Connecting hole, 3-2. Joint surface, 4. Brake fixing piece, 5. Brake thin sleeve, 5-1. Brake flange, 6. Stator gland, 7 , water jacket, 8, torque motor stator, 9, torque motor rotor, 10, hollow mandrel, 10-1, hollow mandrel flange, 11, bearing, 12, connection plate, 13, shield, 14, circular grating , 15, lip seal ring, 16, counterweight, 17, bushing, 18, circular grating reading head, 19, stroke switch bumper, 20, stroke switch.

Detailed ways

The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

The present invention is a hollow direct-drive type vertical-horizontal conversion swing head structure, comprising a main shaft 1, a main shaft fixing part 2, a housing 3, a brake fixing part 4, a brake thin sleeve 5, a stator gland 6, and a water jacket 7 , torque motor stator 8, torque motor rotor 9, hollow mandrel 10, bearing 11, connection plate 12, shield 13, circular grating 14, lip seal ring 15, counterweight 16, bushing 17, circular grating reading head 18. Travel switch bumper 19 and travel switch 20;

As shown in Figures 1 and 2, the lower part of the main shaft 1 is provided with a cutter head, the main shaft 1 is connected to the end face of the main shaft fixing part 2 through screws, and is positioned through the inner holes 2-3 of the front and rear toroidal surfaces; the main shaft fixing part 2 Connect one end of the connection plate 12 with a screw through the screw hole 2-1, and the joint is the connection surface 2-4; the axis of the main shaft 1 and the axis of the hollow mandrel 10 are arranged in a vertical and horizontal conversion; the joint surface of the housing 3 is 3- 2 and the axis of the hollow mandrel 10 are arranged vertically and horizontally. The vertical-horizontal conversion arrangement means that when the housing 3 is fixed by the joint surface 3-2, the hollow mandrel 10 rotates around its axis in the inner cavity of the housing 3 under the drive of the torque motor, driving the main shaft 1 to perform vertical The two states of the position and the lying position are switched; when the main shaft 1 is in the upright position, the axis of the main shaft 1 is vertical, and when the main shaft 1 is in the lying position, the axis of the main shaft 1 is horizontal.

The joint surface 3-2 of the housing 3 is provided with a connection hole 3-1, which is used for fixing the entire swing head structure; the hollow mandrel 10 is arranged in the housing 3, and the hollow mandrel 10 is connected to the The other end of the disc 12 is connected; the inner ring of the bearing 11 is connected to the connecting disc 12 by screws, the connecting disc 12 is connected to the hollow mandrel 10 by screws, the outer ring of the bearing 11 is connected to the housing 3 by screws, and the bearing 11 The combined radial and thrust rolling bearings can be the existing YRT series cylindrical roller turret bearings on the market, but other forms can also be used; so that the hollow mandrel 10 can rotate through a bearing 11 arranged in the housing 3 In the inner cavity, since the hollow mandrel 10 is rotatably connected to the inner ring of the bearing 11 through the connecting disc 12, and the connecting disc 12 is directly connected to the main shaft fixing part 2, the main shaft fixing part 2 acts on the hollow mandrel 10 when the main shaft 1 swings. The torque is the smallest, and the structure is stable and compact.

The torque motor rotor 9 is fixed on the hollow mandrel flange 10-1 by screws, and the torque motor stator 8 is thermally installed in the inner hole of the water jacket 7, and the water jacket 7 passes through the axial flange of the stator gland 6 to The front is pressed to death in the inner cavity of the housing 3;

As shown in Figure 2 and Figure 6, the brake fixing part 4 is connected with the stator cover 6 through screws, and the brake thin sleeve 5 is connected with the brake fixing part 4 through the brake flange 5-1 with screws. An annular oil chamber is dug on the outer circle of the brake sleeve 5, and O-type sealing rings are arranged on both sides of the annular oil chamber; there is a small gap between the inner hole of the brake sleeve 5 and the journal of the hollow mandrel 10 , The brake fixing part 4 is provided with an oil hole. When the annular oil cavity of the brake sleeve 5 is fed into the high-pressure fluid medium through the oil hole, the brake sleeve 5 is deformed and tightly hugs the outer circle of the hollow mandrel 10 to realize the braking of the pendulum;

As shown in Figure 3 and Figure 4, the circular grating 14 is fixed on the step of the shaft end of the hollow mandrel 10, the circular grating reading head 18 is fixed on the brake fixing part 4 through a bracket, and the circular grating signal is used to realize the swing shaft closed-loop control;

As shown in FIG. 3 and FIG. 5 , the travel switch bumper 19 is installed on the end face of the hollow mandrel 10 shaft end, and the travel switch 20 is fixed on the brake fixing member 4 through a bracket. The travel switch signal is used for the positive and negative travel limit and origin of the pendulum shaft;

As shown in Figure 2, the counterweight 16 is arranged on the other end of the main shaft fixing part 2 opposite to the main shaft. When the main shaft 1 is in the upright position, the counter weight 16 is located at the lower end of the main shaft fixing part 2 for balancing the rotation. When the eccentric moment of the main shaft 1 and the main shaft fixing part 2;

As shown in Figure 2 and Figure 6, the inner side of the hollow mandrel 10 is equipped with a wear-resistant soft bushing 17, the rear end of the brake fixing part 4 is equipped with a perforated shield 13, the main shaft fixing part 2 There are empty slots 2-5 and threading holes 2-2; the pipes and cables at the tail of the main shaft can enter the empty slots 2-5 through the threading holes 2-2 on both sides of the main shaft fixture 2, and then turn into the hollow core The shaft 10 is finally drawn out through the slotted hole on the shield 13 . The bushing 17 inside the hollow mandrel 10 is made of wear-resistant soft material to prevent the cables and pipes from being scratched when swinging;

As shown in FIG. 2 , the lip seal 15 is located at the junction of the housing 3 and the connecting plate 12 to ensure the front end of the pendulum shaft is sealed and prevent pollutants such as dust and cutting fluid from entering.

When designing the structure of the housing 3, it is necessary to ensure that the tip point of the cutter head is located on the extension line of the axis of the swing shaft, so as to ensure that the tip point of the cutter head remains unchanged during vertical and horizontal conversion.

The above examples are only to illustrate the technical conception and characteristics of the present invention, and its purpose is to allow people familiar with this technology to understand the content of the present invention and implement it accordingly, and cannot limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention shall fall within the protection scope of the present invention.

Claims (1)

1. A vertical-horizontal conversion swing head structure with a hollow core shaft and a direct drive is characterized by comprising a main shaft (1), a main shaft fixing piece (2), a shell (3) and a hollow core shaft (10);

the hollow mandrel (10) is rotatably arranged in the inner cavity of the shell (3) through a bearing (11), and a connecting disc (12) is coaxially fixed at the connecting end of the hollow mandrel (10); a torque motor for driving the hollow mandrel (10) to rotate is arranged between the hollow mandrel (10) and the shell (3);

the bearing (11) adopts a rolling bearing, an inner ring is fixedly connected with the connecting disc (12), and an outer ring is fixedly connected with the shell (3);

the lower part of the main shaft (1) is provided with a tool bit, and the main shaft (1) is fixedly arranged on the main shaft fixing piece (2); one side of the main shaft fixing piece (2) is fixed with the connecting disc (12);

the combining surface of the shell (3), the axis of the main shaft (1) and the axis of the hollow mandrel (10) are in vertical and horizontal conversion arrangement, and the knife point of the knife head is positioned on the axis of the hollow mandrel (10);

the torque motor comprises a torque motor stator (8) and a torque motor rotor (9); a water jacket (7) is arranged in the inner cavity of the shell (3), and the water jacket (7) is pressed in the inner cavity of the shell (3) through a stator gland (6); a torque motor stator (8) is arranged in an inner hole of the water jacket (7), and a torque motor rotor (9) is fixed on a hollow mandrel flange (10-1) on the outer wall of the hollow mandrel (10);

the band-type brake is characterized by also comprising a band-type brake thin sleeve (5) and a band-type brake fixing piece (4);

the band-type brake fixing piece (4) is fixed on the stator gland (6), and an oil through hole is formed in the band-type brake fixing piece (4);

the band-type brake thin sleeve (5) is fixed on the inner side of the band-type brake fixing piece (4), an annular oil cavity is formed in the excircle of the band-type brake thin sleeve (5), sealing rings are arranged at two ends of the annular oil cavity, and the oil through hole is communicated with the annular oil cavity; a gap is arranged between the inner hole of the band-type brake thin sleeve (5) and the shaft neck of the hollow mandrel (10);

the device also comprises a circular grating (14) and a circular grating reading head (18); the circular grating (14) is fixed on a step at the shaft end of the hollow mandrel (10); the circular grating reading head (18) is fixed on the band-type brake fixing piece (4) through a bracket;

the device also comprises a travel switch collision block (19) and a travel switch (20); the travel switch collision block (19) is fixed on the end surface of the shaft end of the hollow mandrel (10); the travel switch (20) is fixed on the band-type brake fixing piece (4) through a bracket;

the main shaft fixing piece (2) is also provided with a threading hole (2-2) and an empty groove (2-5) which are communicated, and the empty groove (2-5) is communicated with the inside of the hollow mandrel (10); the main shaft pipeline and the cable penetrate through the swing shaft, so that the cable cannot influence the swing of the swing head;

a counterweight block (16) is arranged on the other side of the main shaft fixing piece (2) opposite to the main shaft (1);

a protective cover (13) fixedly connected with the shell (3) is arranged outside the free end of the hollow mandrel (10);

a lining (17) made of wear-resistant soft materials is arranged in the hollow mandrel (10); the lining is made of a wear-resistant soft material, so that the cable and the pipeline in the hollow mandrel are in contact with the lining and are not in direct contact with the hollow mandrel;

a lip-shaped sealing ring (15) is arranged at the joint of the shell (3) and the connecting disc (12);

the axis of the main shaft (1) and the axis of the hollow mandrel (10) form an angle of 45 degrees, the knife point of the main shaft (1) is positioned on the axis of the hollow mandrel (10), and the knife point is unchanged during vertical and horizontal conversion processing.

Images