CN115446692B

CN115446692B - Lower pendulum machine

Info

Publication number: CN115446692B
Application number: CN202211015682.4A
Authority: CN
Inventors: 周立坤
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2023-12-19
Anticipated expiration: 2042-08-24
Also published as: CN115446692A; WO2024041451A1

Abstract

The invention discloses a lower pendulum machine, which relates to the field of optical cold processing equipment and comprises a base and a base connected with the base through three bearing units, wherein a pressure unit is arranged on the base, and two vertical surfaces of the base are respectively connected with a swinging seat through a first positioning seat and a second positioning seat so as to realize high-rigidity connection. The swing seat also comprises a power unit for driving the swing seat to swing. According to the invention, through the built-in swinging seat structure, the stress points are built in the swinging seat, the length of the force arm of the force is compressed to the minimum state, so that the harmful moment which causes the swinging seat to generate bending deformation is reduced to an extremely low value, and an important precondition is provided for the high stability of the swinging precision of the swinging seat.

Description

Lower pendulum machine

Technical Field

The invention relates to the field of optical cold working equipment, in particular to a lower swing machine.

Background

The lower pendulum machine is widely used in the field of optical cold working, and is particularly applied to the process links of grinding and polishing optical lenses. The existing pendulum machine has the following disadvantages (refer to fig. 1-6):

(1) The original base (1) is connected with the original base (10) in a large-plane laminating mode, and the original base (10) is subjected to frequent geometric deformation due to the influence of external factors such as mechanical vibration, temperature, ground flatness and the like. The geometric deformation of the original base (10) causes the joint surface of the original base (10) and the original base (1) to generate distortion deformation. In addition, the original base (10) has certain original errors in the manufacturing link, deformation and the original errors are overlapped together, so that larger flatness errors exist on the connecting surface of the original base (10) and the original base (1), the errors are transferred to the original base (1) in a whole-surface attaching connecting mode, the original base (1) generates larger geometric deformation, the original base (1) is an important carrier of the geometric precision of a lower pendulum mechanism key, and the relative position precision among all functional units is determined. Therefore, the unstable state caused by the deformation of the original base (1) directly damages the relative position accuracy between the functional units of the lower pendulum machine. The working accuracy is unstable, and the manufacturing accuracy of the lens is seriously affected. And even not continue to be suitable for production. Even if the relative positions of the functional units are readjusted, only a short time can be achieved. Based on the influence of the connection mode of large plane lamination on objective factors of deformation and error conduction, the original base (1) is influenced by the deformation transmission of the original base (10) to generate new deformation along with the development of time.

(2) The primary first bearing seat (7 a) and the primary second bearing seat (7 b) are horizontally arranged on the primary base (1), so that the primary base (1) is required to be provided with a left cantilever arm and a right cantilever arm to provide a supporting surface for installation and fixation. The supporting surface is positioned above the left cantilever arm and the right cantilever arm. The original first bearing seat (7 a), the original second bearing seat (7 b) are internally provided with the original first bearing (8 a), the original second bearing seat (8 b) and the fastening bolts, so that the original first bearing seat (7 a) and the original second bearing seat (7 b) are large in size, the left overhanging arm and the right overhanging arm are required to ensure the length of the installation connection surface by long overhanging amount, and the overhanging platform is also provided with long overhanging amount. Longer overhangs will severely weaken the rigidity of the cantilever structure.

(3) The original first bearing (8 a) is connected with one side of the original swinging seat (9) through an original first positioning shaft (6 a); the original second bearing (8 b) is connected with the other side of the original swinging seat (9) through the original second positioning shaft (6 b). The mode leads to a certain action distance between the bearing supporting force and the original swinging seat (9) to generate bending moment, and then leads to a certain bending deformation on two sides of the original swinging seat (9).

(4) The original pressure unit (3) and the original positioning flange (2) are mutually positioned in a hole-shaft matching mode, and when fastening force is applied, the contact surface of the original pressure unit (3) and the original positioning flange (2) is an arc contact surface which is distributed along the axial direction at the 1 position. The geometrical position state of the scheme is easy to be influenced by radial force to change, and the scheme has poor stability and poor positioning precision.

(5) The original main shaft unit (13) and the original swinging seat (9) are mutually positioned in a hole shaft matching way, and when a fastening force is applied, the contact surface of the original main shaft unit (13) and the original swinging seat (9) is an elongated contact surface which is axially distributed at the 1 position. The geometrical position state of the scheme is easy to be influenced by radial force to change, and the scheme has poor stability and poor positioning precision.

(6) The original swinging seat (9) has 2 right-angle structures, the mechanical conduction path of the right-angle structures is overlong, the rigidity is poor, and the root parts of fork arms at two sides are weak, so that the stability of the original swinging seat (9) is insufficient.

(7) The original swinging seat (9) is connected with a power output shaft through a crank unit (15) and a connecting rod unit (14) and transmits power to the power output shaft, so that the swinging function of the original swinging seat (9) is realized. Because the connection mode of former crank unit (15) and power take off shaft is screw side fixed flat key connection, this mode screw area of contact is little, and easily not hard up, joint strength is weaker, and flat key connection exists certain transmission clearance, leads to there being impact vibration in former crank unit (15) motion process. Because the original connecting rod unit (14) is of a rigid structure, impact vibration is inevitably conducted to the original swinging seat (9) through the original connecting rod unit (14), so that smoothness of swinging motion is affected, and manufacturing accuracy of the lens is further affected.

(8) The original main shaft unit (13) comprises an original main shaft front bearing (1308) and an original main shaft rear bearing (1309) which are both angular contact bearings, the mode of eliminating play and pre-pressing is realized by changing the difference value of the axial length of an original main shaft inner space ring (1303) and an original main shaft outer space ring (1302), the difference value of the length is very small, usually several micrometers to tens micrometers, multiple grinding and measurement are needed manually, and the process is complicated. Especially when the main shaft runs, different heating values exist in the inner ring and the outer ring of the bearing, the inner ring and the outer ring are respectively conducted on the original main shaft inner spacer ring (1303) and the original main shaft outer spacer ring (1302) through contact surfaces, and the inner ring and the outer ring are provided with different heat conduction paths, so that a certain temperature difference exists between the original main shaft inner spacer ring (1303) and the original main shaft outer spacer ring (1302), and then the thermal expansion amounts of the original main shaft inner spacer ring (1303) and the original main shaft outer spacer ring (1302) are different, so that the pre-compression of the bearing is changed, even play is generated, and finally the working accuracy of the main shaft is seriously influenced.

(9) The original pressure unit (3) includes an original lower bearing (306) and an original upper bearing (307), both of which are sliding bearings. In the lens processing process, each time a lens is ground or polished, the original mandrel (302) needs to reciprocate along the vertical axial direction, abrasion exists in sliding friction, and cooling liquid adsorbed on the surface of the original mandrel (302) is easily introduced into a sliding friction surface in the reciprocating motion of the original mandrel, so that the original working condition of sliding friction is changed, the axial movement is not smooth, even creeping occurs, the pressure born by the lens is unstable, and the manufacturing precision of the lens is reduced. Meanwhile, as a certain amount of fine and hard polishing powder particles are entrained in the cooling liquid adsorbed by the original mandrel (302), the abrasion of the sliding friction pair is accelerated, the fit clearance is increased by the abrasion, the centering precision is greatly reduced and even fails, the stress point of the lens is deviated, the stress is uneven, and the manufacturing precision of the lens is seriously affected.

(10) The original swinging seat (9) swings the rotation center point position and is positioned through the original first positioning shaft (6 a), the original second positioning shaft (6 b) and the positioning holes on two sides of the original swinging seat (9) in a hole shaft matching mode. Because of certain errors in mechanical processing links and error accumulation among working procedures, larger shape errors and position errors exist in positioning holes on two sides of an original swinging seat (9), further, the swinging rotation center line realized based on the error state cannot vertically intersect with the axis of an original main shaft (1301), the deviation is larger, and the processing precision of a lens is seriously influenced.

(11) The original base (1) is of a door-shaped open structure, has weak structural rigidity and is easy to deform due to external force or internal stress. At present, the large deformation of the original base (1) is an important factor influencing the precision of the lower pendulum machine.

(12) The original base (10) is limited in rigidity only by using a material of a large thickness, and lacks an efficient high-rigidity layout. The original base (10) is insufficient in rigidity, and a large internal space is wasted, so that related electrical components cannot be arranged inside the original base (10), and an additional electrical cabinet is needed to accommodate the related electrical components.

(13) The original pressure unit (3) comprises an original upper spring seat (323) and an original lower spring seat (324), wherein the original upper spring seat (323) and the original lower spring seat (324) are respectively provided with a hole structure with a certain length, and the hole structures are used for connecting and positioning the outer diameter of an original spring (325); the length of the spring in the maximum compression state is the sum of the depths of the hole structures at the two ends of the original upper spring seat (323) and the original lower spring seat (324), and the spring cannot be compressed further, namely, larger pressure cannot be provided for producing large-size lenses. Or can only realize bigger pressure through dismantling and changing the spring of great line footpath, the operation is too loaded down with trivial details.

(14) The primary small shaft unit (33) includes a primary small shaft (3301). The outer diameter of the original small shaft (3301) is sequentially provided with an original nut cover (3302), an original miniature front space ring (3303), an original small shaft sealing ring (3304), an original first miniature bearing (3305), an original second miniature bearing (3306), an original third miniature bearing (3307), an original miniature inner space ring (3308), an original miniature outer space ring (3309) and an original small shaft rear nut (3310). During the lens grinding and polishing process, the original small shaft (3301) bears axial force and radial force. The original first small shaft bearing (3305), the original second small shaft bearing (3306) and the original third small shaft bearing (3307) are deep groove ball bearings, the load born by the original small shaft unit (33) contains larger axial load, the original first small shaft bearing (3305), the original second small shaft bearing (3306) and the original third small shaft bearing (3307) bear together, when the deep groove ball bearings bear larger axial load, complete contact ellipses (a contact area exceeds a channel) cannot be formed between the balls and the ferrule, stress concentration is generated, and damage of the bearings is accelerated. The deep groove ball bearing is not suitable for bearing large axial force, the scheme leads to rapid failure of the bearing, and the bearing needs to be frequently replaced in order to maintain the normal working state.

Disclosure of Invention

The invention aims to at least solve one of the technical problems in the prior art and provides a lower hem machine.

The technical scheme of the invention is as follows:

the utility model provides a lower pendulum machine, includes the base and with the base of base connection, the base top is provided with pressure unit, base vertical face both ends are provided with rotatable seat that sways, and the seat below of swaing is provided with the connecting rod unit, and the connecting rod unit is connected with the power pack that is used for driving its wobbling.

Preferably, two vertical surfaces of the base are respectively connected with the first positioning seat and the second positioning seat.

Preferably, three bearing units are arranged above the base: the first bearing unit, the second bearing unit and the third bearing unit are connected with the base.

Preferably, the first carrying unit, the second carrying unit and the third carrying unit have certain flexibility.

Preferably, the first positioning seat is connected with the inner ring of the first bearing, the outer ring of the first bearing is connected with the first bearing seat, locking and fixing are realized through the first locking ring, and the first bearing seat is connected with one side positioning hole of the swinging seat; the second positioning seat is connected with the inner ring of the second bearing, the outer ring of the second bearing is connected with the second bearing seat and locked and fixed through the second locking ring, and the second bearing seat is connected with the positioning hole on the other side of the swinging seat.

Preferably, the base is connected with the pressure unit through a positioning flange, the positioning mode of the pressure unit and the positioning flange is Kong Zhoujian clearance fit, and the inner hole of the positioning flange is provided with a first through groove.

Preferably, the positioning mode of the main shaft unit and the swinging seat is Kong Zhoujian clearance fit, and the inner hole of the swinging seat is provided with a through second groove.

Preferably, the rocking seat is provided with a ramp structure.

Preferably, the power unit includes a swing motor rotated in a circumferential direction with reference to an axial direction thereof to generate a specific angle α for the purpose of occupying a smaller amount of space, and takes the α -angle state as a final connection state.

Preferably, the connecting rod unit comprises a connecting rod, the connecting rod and the connecting rod head are connected through an elastic element and a fastener, a connecting rod bearing is installed at the end part of the connecting rod, a fixing pin connected with the swinging seat is installed in the connecting rod bearing, a connecting rod head bearing is installed at the end part of the connecting rod head, and an adjustable pin connected with the crank unit is installed in the connecting rod head bearing.

Preferably, one end of the crank unit is connected with an output shaft of the power unit in a connecting mode of mainly radial axle locking of the crank frame, the locking frame, the first fastening piece and the second fastening piece and in a combined mode of assisting flat key transmission.

Preferably, a main shaft unit is arranged in the swinging seat, the main shaft unit comprises a main shaft, a main shaft protecting cover is arranged at the head of the main shaft, a front bearing and a first lock nut are arranged at the front shaft neck of the main shaft, a rear bearing, a belt pulley and a second lock nut are arranged at the tail of the main shaft, the left end face of an outer ring of the rear bearing is contacted with a pressure ring, a plurality of counter bores are arranged in the circumferential direction of the pressure ring, a main shaft spring is arranged in the counter bores, one end of the main shaft spring is contacted with the pressure ring, the other end of the main shaft spring is contacted with a spacer ring, the main shaft spring is in a compressed state, and the spacer ring is connected with a main shaft chamber.

Preferably, the positioning holes on two sides of the swinging seat are respectively provided with at least three adjusting points along the circumferential direction, each adjusting point can move along the radial direction of the positioning hole through the rotation of the set screw, and the actual positions of a circle and the center of the circle are determined through the at least three adjusting points, so that the radial fine adjustment of the position of the swinging rotation center point on any side is realized.

Preferably, the base is provided with a box structure comprising at least one box for stiffening.

Preferably, the base comprises a rear plate, the rear plate is connected with a rear inclined plate, the rear inclined plate is connected with a middle plate, the middle plate is connected with a rear bottom plate, and the rear bottom plate is connected with a lower rear plate; the reinforced connection of the rear plate, the rear sloping plate and the middle plate is realized by arranging at least one rib plate; wherein, the medium plate sets up at least one department upper shed. Based on the above connection state as a whole, one end of the whole is connected with the first side plate, and the other end is connected with the second side plate, thereby realizing a torsion box body structure.

Preferably, the pressure unit comprises a reference shaft, an upper bearing and a lower bearing are respectively arranged in positioning holes at two ends of the reference shaft, and the mandrel is arranged in the upper bearing and the lower bearing, wherein the upper bearing and the lower bearing are designed into aerostatic bearing structures, so that the upper bearing and the lower bearing realize an air suspension bearing mode for the mandrel.

The upper end face of the mandrel is provided with a shifting block and a lower spring seat, the shifting block is sequentially connected with the gauge stand and the limit gauge, a fixed seat is arranged above the reference shaft, the fixed seat is simultaneously and respectively connected with a main guide shaft, an auxiliary guide shaft, a check rod and a fine-tuning measuring head in a matched manner, the main guide shaft and the auxiliary guide shaft are simultaneously connected with a connecting block, the upper part of the connecting block is connected with a cylinder seat, the upper part of the cylinder seat is connected with a cylinder, the shaft end of the cylinder is connected with a shifting fork, a linear bearing is assembled in the shifting fork, the linear bearing and the main guide shaft form a guide rail pair, a fork claw of the shifting fork is arranged between the shifting block and the spring seat, the upper part of the shifting fork is connected with an adjusting seat, the upper part of the adjusting seat is sequentially connected with an adjusting rod and a locking nut, the lower part of the adjusting rod is sequentially connected with a bearing and an upper spring seat, and a spring seat is provided with a spring between the upper spring seat, wherein the upper spring seat is provided with a shaft structure with a certain length for connecting and positioning the outer diameter of the spring; the lower spring seat is provided with a hole structure of a certain depth for connecting and positioning the outer diameter of the spring. The adjusting seat is connected with the adjusting pull rod and the adjusting nut in sequence, the lower end of the adjusting pull rod is connected with the tension spring, the lower end of the tension spring is connected with the shifting block, the shifting block is in sliding contact with the check rod, the shifting block is connected with the gauge stand, and the gauge stand is connected with the limit gauge. When the cylinder acts upwards, the shifting fork and other parts connected with the shifting fork in sequence are driven to move together along the axial direction of the main guide shaft. The shifting fork is in direct contact with the lower spring seat in the upward moving process and moves together. When the cylinder moves downwards, the shifting fork and other parts connected with the shifting fork in sequence move downwards along the axial direction of the main guide shaft, the shifting fork comprises an upper spring seat, the upper spring seat pushes a spring, downward force is conducted to the lower spring seat, and then the downward force is conducted to the mandrel, a small shaft unit is arranged at the lower end of the mandrel, and the mandrel and the small shaft unit move downwards under the combined action of spring force, tension of the tension spring and gravity.

Preferably, the small shaft unit comprises a small shaft, and the small shaft outer diameter is provided with a small shaft nut cover, a first sealing ring, a first miniature bearing, a second miniature bearing, a miniature inner spacer ring, a miniature outer spacer ring, a third miniature bearing, a second sealing ring, a miniature rear spacer ring, a miniature bearing sleeve, a fourth miniature bearing and a small shaft rear nut in sequence.

Preferably, the first micro bearing, the second micro bearing and the fourth micro bearing are deep groove ball bearings, and the third micro bearing is a thrust ball bearing.

The beneficial effects of the invention are as follows:

(1) According to the lower pendulum machine, the base is connected with the first positioning seat and the base is connected with the second positioning seat in a vertical plane mode. The mode is beneficial to eliminating the weak rigid structure of the left cantilever arm and the right cantilever arm in the past; the vertical surface is close to the base body, the rigidity is high, and meanwhile, the scheme can greatly reduce the overhanging amount of the upper overhanging table and improve the rigidity of the upper overhanging table.

(2) According to the lower pendulum machine disclosed by the invention, the base and the base are connected through the three bearing units to form a bearing mode of three-point connection (three points are not collinear), and the existence of a plane can be determined by any three non-collinear points, so that the base can be adapted to the base in any geometric error (original error plus geometric deformation error) state through the three bearing points, further the geometric error of the base is effectively blocked from being further transmitted to the base, and a critical precondition guarantee is provided for the geometric precision stability of the base and the relative position precision between the functional units connected with the base.

(3) According to the lower pendulum machine, the first bearing and the second bearing are internally arranged in the positioning holes on two sides of the swinging seat, so that the stress points are internally arranged in the swinging seat, and the harmful moment generated by bending moment arms due to the fact that the stress points are externally arranged in the prior scheme is avoided. The stress of the swinging seat is optimized, and the swinging precision and the geometric stability of the swinging seat are improved.

(4) According to the lower pendulum machine, the through first groove is added in the inner hole of the positioning flange relative to the past, so that the positioning contact surface at 1 part in the positioning flange hole is separated into the positioning contact surfaces at 2 parts and separated by a certain distance, and a mechanically stable positioning mode is realized.

(5) According to the lower pendulum machine, the through second groove is added in the inner hole of the swinging seat relative to the past, so that the positioning contact surface at 1 part in the swinging seat hole is separated into the positioning contact surfaces at 2 parts and separated by a certain distance, and a mechanically stable positioning mode is realized.

(6) The lower pendulum machine has the advantages that the U-shaped inner folding angle of the swinging seat is of an inclined plane structure, the inclined plane structure shortens the mechanical conduction path and strengthens the rigidity.

(7) According to the lower pendulum machine, the circumferential installation angle alpha of the swinging motor is an acute angle, so that the mode is high in coordination, and a space for further arranging reinforcing ribs is effectively and maximally provided for the swinging seat inclined plane structure.

(8) The connecting rod unit comprises a connecting rod, and the connecting rod is connected with the connecting rod head through an elastic element and a fastening piece. The connecting rod unit can generate axial elastic deformation when being impacted by the outside, so that the connecting rod unit has effective blocking and buffering effects on impact vibration generated by the power unit and the transmission link.

(9) The invention relates to a lower pendulum machine, wherein the connection mode of a crank unit and an output shaft of a power unit is a combined connection mode of radial shaft locking and flat key transmission. The connecting mode has compact structure, can be applied to higher load, and has the characteristics of stable connection, high strength and no back clearance in transmission.

(10) According to the lower pendulum machine, the main shaft unit is used for eliminating bearing play and providing precompression through the elastic force of the main shaft spring. Because the elastic force of the main shaft spring is constant and is not easy to change due to temperature change, based on the mode, the main shaft can provide constant precompression for the main shaft bearing under the condition of different heating values generated by any rotating speed within the allowable rotating speed range of the bearing and any working time length, and important guarantee is provided for the main shaft unit to realize high-precision and high-stability rotation.

(11) According to the lower swing machine, the pressure unit and the fixed seat are connected with the connecting block through the main guide shaft and the auxiliary guide shaft; meanwhile, the main guide shaft and the auxiliary guide shaft respectively provide the main guide and auxiliary guide for the movement of the shifting fork. According to the scheme, the shifting fork does not need to rely on the mandrel to provide circumferential positioning, namely, the shifting fork is not contacted with the mandrel, so that resistance affecting movement of the mandrel does not exist, and when the lens is subjected to grinding or polishing, an important precondition is provided for realizing a tiny and smooth axial floating state required by the mandrel.

(12) According to the lower pendulum machine, the pressure unit and the fork claw of the shifting fork are arranged between the shifting block and the lower spring seat, and the fork claw is contacted with the lower spring seat and moves upwards together during the lifting process of the shifting fork. The scheme can realize the purpose that the fork claw of the shifting fork is directly connected with the adjusting seat, and the fork claw for connecting the adjusting seat is not required to be additionally arranged. Compared with the prior double-fork claw shifting fork scheme, the shifting fork structure and manufacturability of the preferred scheme are comprehensively improved.

(13) According to the lower pendulum machine, the pressure unit and the upper spring seat are provided with the shaft structure with a certain length, and the shaft structure is used for connecting and positioning the inner diameter of the spring; the lower spring seat is provided with a hole structure of a certain depth for connecting and positioning the outer diameter of the spring. The length of the shaft structure is the same as the depth of the hole structure, when the distance between the upper spring seat and the lower spring seat is adjusted, the spring is compressed and adjusted, when the shaft structure of the upper spring seat completely enters the hole structure of the lower spring seat, the spring is in the maximum compression state, and the length of the spring is equal to the depth of the hole structure of the lower spring seat and the length of the shaft structure of the upper spring seat. The length of the spring in this manner achieves a maximum compression equal to the depth of the spring seat bore and also equal to the length of the spring seat shaft. Compared with the case that the upper spring seat and the lower spring seat both adopt hole structures or the case that the upper spring seat and the lower spring seat both adopt shaft structures, the length of the spring in the maximum compression state is reduced by 1/2, so that a larger limit pressure value is realized.

(14) According to the lower pendulum machine provided by the invention, the hydrostatic bearing scheme is adopted by the pressure unit to provide extremely low friction resistance for the mandrel (the gas viscosity is extremely low, the air viscosity is only one fifth thousandth of that of No. 10 mechanical oil at room temperature, and the friction resistance of the bearing is in direct proportion to the viscosity). And secondly, the exhaust of the hydrostatic bearing exhaust gas forms an air pressure barrier for impurities such as external cooling liquid, fine particles and the like, and provides important preconditions for the scheme of the hydrostatic bearing with high precision, high smoothness and long service life.

(15) According to the lower pendulum machine, the small shaft unit is used for bearing the axial load and the radial load separately, and the axial load is completely transmitted to the thrust ball bearing, so that the damage of the axial load to the deep groove ball bearing is effectively avoided, the contact rigidity is improved, and the service life of the bearing is greatly prolonged.

(16) According to the lower pendulum machine, the positions of the swing rotation center points on two sides of the swing seat can be radially fine-tuned through at least 3 adjusting points; therefore, the swing rotation center line is perpendicularly intersected with the axis of the original main shaft, and the error is controlled in a very small range.

(17) According to the lower pendulum machine, the base is provided with the box-shaped structure, the cross sections of the box-shaped structure are closed hollow cross sections, and when the materials are the same, the bending rigidity and the torsional rigidity can be provided more than those of other cross section forms. The base based on the box-shaped structure has excellent stability and deformation resistance, so that the base can have the characteristics of high rigidity, high stability and low weight. In particular, by further functional structural extension based on the box-shaped structure, the high rigidity characteristic of the box-shaped structure can be obtained at the same time.

(18) According to the lower pendulum machine, the base is provided with the box body structure with one open surface, the structure is excellent in mechanical performance, the mechanical strength and the rigidity of the base are greatly improved, and meanwhile, the weight of the base is reduced. The rear inclined plate and the middle plate are intersected at the bottom edge of the upper opening, an avoidance space is provided for the swing of the swing seat, and meanwhile, the distance between the intersected connecting line with the high rigidity characteristic and the supporting point of the power unit is minimized, so that the power unit is supported in a strengthening way. And secondly, the box body structure has a certain internal space, and the included angle beta enables the internal space of the box body to be further enlarged on the premise of avoiding the swinging interval of the swinging seat, so that the electric elements related to the lower swinging machine can be effectively contained in the box body, a huge external electric cabinet is omitted, and the overall dimension is more compact.

Drawings

FIG. 1 is a perspective view of the prior art (some of the functions contained therein being embodied in a structurally schematic manner);

FIG. 2 is a front view (with portions included in a partial cutaway representation) of the connections between the functional units of FIG. 1;

FIG. 3 is a schematic view of the positioning connection between the original pressure unit and the original positioning flange in FIG. 1; and a positioning connection schematic diagram between the original main shaft unit and the original swinging seat in the figure 1;

FIG. 4 is a diagram of the connections between the primary crank unit, primary connecting rod unit, primary power shaft of FIG. 1;

FIG. 5 is a schematic view of the spindle unit in FIG. 1;

FIG. 6 is a schematic view of the small axis unit in FIG. 1;

FIG. 7 is a front view of a preferred embodiment of the present invention (with some of its functions contained therein being embodied in a structurally schematic manner);

FIG. 8 is a partial assembled perspective view of a preferred embodiment of the present invention;

FIG. 9 is a cross-sectional view E-E of FIG. 7;

fig. 10 is a schematic cross-sectional view of a carrier and its connection in a carrier unit according to a preferred embodiment of the present invention;

fig. 11 is a partial enlarged view (left) of B in fig. 9, and a partial enlarged view (right) of C;

FIG. 12 is a schematic view of the connection of a pressure unit to a positioning flange in a preferred embodiment of the present invention;

FIG. 13 is a schematic diagram showing the connection of the spindle unit to the wobble seat according to the preferred embodiment of the present invention;

FIG. 14 is a cross-sectional view of F-F in FIG. 7;

FIG. 15 is a diagram showing the structure of the swing seat (including the inclined plane structure), the relative position of the swing motor, and the circumferential installation angle α according to the preferred embodiment of the present invention;

FIG. 16 is a schematic view showing the connection relationship among the wobble seat, crank unit, connecting rod unit, and power unit in the preferred embodiment of the present invention;

FIG. 17 is a perspective view (up) and a front view (down) of the connection between the crank unit and the connecting rod unit in the preferred embodiment of the present invention;

FIG. 18 is a schematic illustration of the connection between the crank unit and the output shaft of the power unit in a preferred embodiment of the invention;

fig. 19 is a schematic cross-sectional view showing the structure of a spindle unit in a preferred embodiment of the present invention;

fig. 20 is a perspective view (left), front view (middle), left view (right) of a pressure unit in a preferred embodiment of the present invention;

FIG. 21 is a schematic view of an upper spring seat and a lower spring seat for adjusting the spring to a maximum compression state in a preferred embodiment of the present invention;

FIG. 22 is a schematic view of the structure of the pressure unit in the preferred embodiment of the present invention (right) as shown in FIG. 20 (left) in the section G-G, and in FIG. 20 (middle) in the section H-H;

FIG. 23 is a schematic cross-sectional view of a small shaft unit in accordance with a preferred embodiment of the present invention;

FIG. 24 is a schematic view of fine adjustment of the first and second bearings relative to the wobble seat in a preferred embodiment of the invention.

Fig. 25 is a front view (upper left), a Q-Q sectional view (upper right), a perspective view (lower left), and a perspective view (lower right) of the base in the preferred embodiment of the present invention.

Fig. 26 is a perspective view of a base in a preferred embodiment of the present invention.

Fig. 27 is a perspective exploded view of a base in a preferred embodiment of the present invention.

Fig. 28 is a front view (left), P-P cross-sectional view (right) of the base in the preferred embodiment of the invention.

Fig. 29 is a front view of the middle plate of the base in the preferred embodiment of the present invention.

In the figure, a 1-primary base, a 2-primary positioning flange, a 3-primary pressure unit, a 7 a-primary first bearing seat, a 7 b-primary second bearing seat, an 8 a-primary first bearing, an 8 b-primary second bearing seat, a 6 a-primary first positioning shaft, a 6 b-primary second positioning shaft, a 5 a-primary first pressing ring, a 5 b-primary second pressing ring, a 4 a-primary first pressing cover, a 4 b-primary second pressing cover, a 9-primary swinging seat and a 10-primary base;

13-primary spindle units, 1301-primary spindles, 1302-primary outer spacers, 1303-primary inner spacers, 1304-primary spindle chambers, 1305-primary locking rings, 1306-primary spindle protective covers, 1307-primary pulleys, 1308-primary spindle front bearings, 1309-primary spindle rear bearings, 1310-primary spindle locking nuts and 1311-primary rear end covers;

the device comprises a 3-primary pressure unit, a 301-primary reference shaft, a 302-primary mandrel, a 304-primary shifting block, a 305-primary shifting fork, a 306-primary lower bearing, a 307-primary upper bearing, a 311-primary cylinder, a 323-primary upper spring seat, a 324-primary lower spring seat and a 325-primary pressure spring;

33-original small shaft unit, 3301-original small shaft, 3302-original nut cap, 3303-original front spacer ring, 3304-original sealing ring, 3305-original first miniature bearing, 3306-original second miniature bearing, 3307-original third miniature bearing, 3308-original miniature inner spacer ring, 3309-original miniature outer spacer ring, 3310-original small shaft rear nut;

21-a base, 210-a base, 211-an upper protective cover, 212-a lower protective cover, 22-a positioning flange, 23-a pressure unit, 209-a swinging seat, 26 a-a first locking ring, 26 b-a second locking ring, 27 a-a first positioning seat, 27 b-a second positioning seat, 28 a-a first bearing, 28 b-a second bearing, 29 a-a first bearing seat, 29 b-a second bearing seat;

24 a-first carrying unit, 24 b-second carrying unit, 24 c-third carrying unit;

24001-a carrier;

2201-first groove, 22008-first threaded fastener, 22009-first cylindrical pad;

2092-second recess, 20808-second threaded fastener, 20009-second cylindrical pad;

2091-ramp structure;

216-a power unit, 2161-a swing motor and 2162-a speed reducer;

214-link units, 2141-links, 2142-links, 2143-fastening pins, 2144-elastic elements, 2145-link bearings, 2146-adjustable pins, 2147-fixed pins, 2148-links bearings;

215-crank unit, 2151-crank carrier, 2152-locking carrier, 2153-first crank bolt, 2154-second crank bolt.

213-spindle unit, 21301-spindle, 21302-spindle chamber, 21303-spindle locking ring, 21304-spindle protective cover, 21305-front bearing, 21306-rear bearing, 21307-pressure ring, 21308-spindle spring, 21309-pulley, 21310-first lock nut, 21311-second lock nut, 21312-spacer ring;

23-pressure unit, 2301-reference shaft, 2302-mandrel, 2303-fixing seat, 230301-inlet channel, 23001-annular cavity, 23007-outer diameter channel, 23016-lower gap, 23017-upper gap, 2304-dial, 2305-shift fork, 2306-lower bearing, 2307-upper bearing, 2308-linear bearing, 2309-connecting block, 2310-cylinder block, 2311-cylinder, 2312-buffer cylinder, 2313-adjusting seat, 2314-locking nut, 2315-adjusting rod, 2316-stop rod, 2317-main guide shaft, 2318-limit gauge, 2319-fine-tuning probe, 2320-gauge seat, 2321-limit disc, 2322-auxiliary guide shaft, 2323-upper spring seat, 2324-lower spring seat, 2325-spring, 6-tension spring, 2327-adjusting rod, 2328-adjusting nut, 2329-adjusting rod bearing;

233-small shaft unit, 23301-small shaft, 23302-small shaft nut cap, 23303-miniature bearing sleeve, 23304-first sealing ring, 23305-first miniature bearing, 23306-second miniature bearing, 23307-fourth miniature bearing, 23308-miniature inner spacer, 23309-miniature outer spacer, 23310-small shaft rear nut, 23311-third miniature bearing, 23312-second sealing ring, 23313-miniature rear spacer.

2091-first spacer, 20112-first set screw, 20921-second spacer, 20922-second set screw, 20931-third spacer, 20932-third set screw; 20941-fourth pad, 20942-fourth set screw, 20951-fifth pad, 20952-fifth set screw, 20961-sixth pad, 20962-sixth set screw;

2101-front wall, 2102-front diagonal wall, 2103-lower wall, 2104-rear wall, 2105-upper wall, 2106-right wall, 2107-left wall, 2108-cabinet, 2109-right vertical face, 2110-left vertical face, 21051-upper right rib, 21052-upper left rib, 21061-right vertical rib, 21062-right diagonal rib, 21063-right transverse rib, 21071-left vertical rib, 21072-left diagonal rib, 21073-left transverse rib;

21001-back plate, 21002-back inclined plate, 21003-middle plate, 21004-back bottom plate, 21005-lower back plate, 21006-first rib plate, 21007-threading hole, 21008-strengthening groove, 21010-first side plate, 21011-second side plate, 21012-front plate, 21013-back channel steel, 21014-front channel steel, 21015-table plate, 21020-left top plate, 21021-left vertical plate, 21022-left bottom plate, 21023-right top plate, 21024-right vertical plate and 21025-right bottom plate.

2101001-first vent, 2101101-second vent, 2100301-upper opening, 2100302-mounting hole, 2100303-mouth bottom edge.

Detailed Description

Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present invention, but not to limit the scope of the present invention.

In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 7 to 29, a preferred embodiment of the present invention:

a skirt machine comprising a base 210 and 3 carrying units having a certain flexibility with the base 210: the base 21 that first bearing unit 24a, second bearing unit 24b, third bearing unit 24c are connected, the base 21 is installed and is gone up protection casing 211, is provided with pressure unit 23 above the base 21, and two vertical faces of base 21 are provided with the built-in seat 209 that sways of bearing, are provided with down protection casing 212 on swaing the seat 209, and swaing the seat 209 below and be provided with connecting rod unit 214, connecting rod unit 214 is connected with the power unit 216 that is used for driving its motion.

In this embodiment, the base 21 is connected to the base 210 by providing three bearing units, specifically, a first bearing unit 24a, a second bearing unit 24b and a third bearing unit 24c distributed under the base 21 in a manner of three points being dispersed and non-collinear, and approximately three vertexes of a triangle, and the connection relationship between the base 21 and the base 210 is achieved by threads at two ends. Because the bearing unit has a certain space volume, so that three bearing points are actually three local bearing surfaces in the implementation process, the bearing unit is required to have certain flexibility so as to further avoid local connection stress caused by the actual shape and position errors of the local bearing surfaces. Therefore, the first bearing unit 24a, the second bearing unit 24b, and the third bearing unit 24c each include at least 1 bearing body 24001, where the bearing body 24001 has a certain flexibility, and may be a rubber buffer with two ends capable of realizing connection, or other elastic elements with two ends independent connection function and a certain connection strength; the specific number of the bearing units 24001 should be determined according to the actual load of the bearing unit where the bearing units are located, and each bearing unit 24001 has independence, so that the base 21 and the base 210 can be independently connected, and the connection scheme makes the geometric accuracy of the base 21 not affected by the geometric error of the base 210 and the deformation transmission, and provides a critical precondition for the stability of the geometric accuracy of the base 21.

The shaft end of the first positioning seat 27a is connected with the inner ring of the first bearing 28a, the outer ring of the first bearing 28a is connected with the first bearing seat 29a, locking and fixing are realized through the first locking ring 26a, and the first bearing seat 29a is connected with a positioning hole on one side of the swinging seat 209. In this way the purpose of the first bearing 28a being built in the rocking seat 209 is achieved; the shaft end of the second positioning seat 27b is connected with the inner ring of the second bearing 28b, the outer ring of the second bearing 28b is connected with the second bearing seat 29b, locking and fixing are realized through the second locking ring 26b, and the second bearing seat 29b is connected with the positioning hole on the other side of the swinging seat 209, so that the purpose that the second bearing 28b is built in the other side of the swinging seat 209 is realized. Compared with the prior stress scheme that the original first bearing 8a and the original second bearing 8b are externally arranged on the two sides of the swinging seat, the stress points are internally provided with the minimum force arm state capable of realizing force, so that the harmful moment of structural bending is reduced to the minimum. The scheme optimizes the weak link stress of the swing seat 209 and well improves the stability of the swing seat 209.

The base 21 is connected with the pressure unit 23 through the positioning flange 22, the positioning mode of the pressure unit 23 and the positioning flange 22 is Kong Zhoujian clearance fit, a first threaded fastener 22008 and a first cylindrical pad 22009 are arranged on the hole wall of the positioning flange 23 to provide fastening force, a through first groove 2201 is arranged on the opposite surface of the first threaded fastener 22008 in the hole, when the fastening force is applied, the contact area between the pressure unit 23 and the hole wall of the positioning flange 22 is an arc-shaped positioning contact surface which is formed by dispersing into 2 parts and separated by a certain distance, and the scheme has a stable mechanical state and can realize high-precision positioning.

Meanwhile, in some embodiments, the positioning manner of the main shaft unit 213 and the swinging seat 209 is Kong Zhoujian clearance fit, the hole wall of the swinging seat 209 is provided with a second threaded fastener 20808 and a second cylindrical pad 20009 to provide fastening force, the opposite surface of the second threaded fastener 20108 in the hole is provided with a through second groove 2092, when the fastening force is applied, the contact area between the main shaft unit 213 and the hole wall of the swinging seat 209 is an arc-shaped positioning contact surface which is separated into 2 parts and a certain distance, and the scheme has a stable mechanical state and can realize high-precision positioning.

The swing seat 209 is provided with an inclined plane structure 2091, more specifically, an inner folded corner of the root of the inner side of the U-shaped fork of the swing seat 209 is an inclined plane structure, the inclined plane structure shortens a mechanical conduction path, the cross-sectional area of the root is increased, and the rigidity coefficient of the cross section is increased, so that the rigidity is enhanced.

Power unit 216 includes a swing motor 2161; the installation angle alpha of the swing motor 2161 in the circumferential direction is an acute angle, namely, any side of the square flange edge of the swing motor 2161 is set as a starting side, and an included angle formed by taking the vertical surface of the U-shaped structure of the swing seat 209 as a final side is the acute angle alpha. The existence of the acute angle alpha effectively and maximally provides space for further layout of the reinforcing ribs for the inclined surface structure 2091 of the swing seat 209, and the scheme has high compactness and provides important technical support for realizing high rigidity and high stability of the swing seat 209 and miniaturization of the lower swing machine.

The link unit 214 includes a link 2141, and one end of the link 2141 is connected to a link head 2142 through an elastic element 2144 and a fastener 2143, and more specifically, the elastic element 2144 is a spring or other element having an elastic function. A connecting rod bearing 2145 is mounted on the end of the connecting rod 2141, a connecting rod head bearing 2148 is mounted on the end of the connecting rod head 2142, the connecting rod bearing 2145 is connected with a fixed pin 2147, the connecting rod head bearing 2148 is connected with an adjustable pin 2146, the fixed pin 2147 is connected with the rocking seat 209, and the adjustable pin 2146 is connected with the crank unit 215. The added elastic element has certain expansion and contraction performance, and the connecting rod 2141 and the connecting rod head 2142 can relatively move along the axial direction of the fastener 2143. The effects of vibration filtering and buffering are achieved, and smoothness and stability in the swinging process are ensured.

The crank unit 215 includes a crank frame 2151, the crank frame 2151 and the locking frame 2152 are connected through a first crank bolt 2153 and a second crank bolt 2154, and are connected with the output shaft of the power unit 216 in a radial shaft locking mode, wherein a key slot is further arranged in an inner hole of the crank frame 2151, and a combined connection mode mainly comprising radial shaft locking and auxiliary flat key transmission is realized. The radial axle-locking mode has the characteristics of stable connection, high connection strength and no transmission back clearance, can allow higher load, and further strengthens the torsional strength by adding a flat key.

The swinging seat 209 is internally provided with a main shaft unit 213, the main shaft unit 213 comprises a main shaft 21301, a main shaft protection cover 21304 is arranged at the head of the main shaft 21301, a front bearing 21305 and a first lock nut 21310 are arranged at the front journal of the main shaft 21301, a rear bearing 21306, a belt pulley 21309 and a second lock nut 21311 are arranged at the tail of the main shaft 21301, the left end face of the outer ring of the rear bearing 21306 is contacted with a pressure ring 21307, a plurality of counter bores are formed at the left end of the pressure ring 21307 along the circumferential direction, a main shaft spring 21308 is arranged in the counter bores, one end of the main shaft spring 21308 is contacted with the pressure ring 21307, the other end of the main shaft spring 21308 is contacted with a spacer 21312, the main shaft spring 21308 is in a compressed state, and the spacer 21312 is connected with a main shaft chamber 21302.

As a preferred embodiment of the invention, it may also have the following additional technical features: the right end of the spacer 21312 is provided with a plurality of counter bores in the circumferential direction for receiving the spindle springs 21308. Or the left end of the pressure ring 21307 and the right end of the spacing ring 21312 are respectively provided with a plurality of corresponding counter bores along the circumferential direction for simultaneously placing the spindle springs 21308; based on additional features, the function of the spacer ring 21312 can be integrated into the structure of the spindle chamber 21312, i.e. as a structural feature of the spindle chamber 21302.

Based on the spring characteristics that the bearing is not easily affected by temperature and the force is constant, the mode of eliminating the bearing play and providing the precompression is realized through the elastic force of the main shaft spring 21308: under the conditions of different heating values generated at any rotating speed within the allowable rotating speed range of the bearing and any working time, constant pre-pressure can be provided for the main shaft bearing, and important guarantee is provided for the main shaft unit 213 to realize high-precision and high-stability rotation.

The pressure unit 23 includes a reference shaft 2301, a lower bearing 2306 and an upper bearing 2307 are respectively installed in positioning holes at two ends of the reference shaft 2301, an outer diameter channel 23007 for gas circulation is provided on an outer diameter of the upper bearing 2307, the mandrel 2302 is installed in the lower bearing 2306 and the upper bearing 2307, and certain fit clearances are provided between the mandrel 2302, the lower bearing 2306 and the upper bearing 2307, namely: the upper gap 23017 and the lower gap 23016 are respectively used for forming a static pressure air film, the lower end of the mandrel 2302 is connected with the small shaft unit 233, a shifting block 2304 and a lower spring seat 2324 are arranged on the upper end face of the mandrel 2302, the shifting block 2304 is sequentially connected with a gauge seat 2320 and a limit gauge 2318, a fixed seat 2303 is arranged on the upper end of the reference shaft 2301, the fixed seat 2303 is provided with an air inlet channel 230301 communicated with an outer diameter channel 23007, the fixed seat 2303 is simultaneously connected with a main guide shaft 2317, a sub guide shaft 2322, a stop rod 2316 and a fine adjustment probe 2319 in a hole shaft positioning and screw side fixing mode, the main guide shaft 2317 and the sub guide shaft 2322 are sequentially connected with a connecting block 2309 in a hole shaft positioning and screw side fixing mode, the upper side of the connecting block 2319 is connected with a cylinder seat 2310, the upper side of the cylinder seat 2310 is connected with the cylinder 2311, the upper side of the cylinder 2311 is connected with the shifting fork 2305, a linear bearing 2308 is arranged in the inner diameter of the shifting fork 2305, the linear bearing 2308 and the main guide shaft 2317 form a guide rail pair, a fork claw of the shifting fork 2305 is arranged between the shifting block 2304 and the lower spring seat 2314, the lower spring seat 2313 is sequentially connected with the lower spring seat 2313, and the upper side of the lower guide shaft 2313 is connected with the lower guide shaft 2313, and the upper end of the lower guide shaft is used for setting a certain length of the adjusting rod, the adjusting rod is arranged between the upper end of the adjusting rod seat 2313 and the adjusting rod through the adjusting rod, the upper end of the adjusting seat is 2323 is connected with the adjusting rod, and the adjusting seat 2323, and the upper end is used for setting; the lower spring seat 2324 is provided with a depth of bore structure for connecting and positioning the inner diameter of the spring 2325. The other part of the adjusting seat 2313 is sequentially connected with an adjusting pull rod 2327 and an adjusting nut 2328, the lower end of the adjusting pull rod 2327 is connected with a shifting block 2304 through a tension spring 2326, and the shifting block 2304 is in sliding contact with a stop lever 2316.

As a preferred embodiment of the invention, it may also have the following additional technical features: the upper spring seat 2323 is provided with a hole structure with a certain depth for connecting and positioning the outer diameter of the spring 2325; the lower spring seat 2324 is provided with a length of shaft structure for connecting and positioning the inner diameter of the spring 2325.

Compressed air enters from one end of an air inlet channel 230301 of the fixed seat 2303, enters an annular cavity 23001 through an outer diameter channel 23007 of the upper bearing 2307, enters an upper gap 23017 matched with the mandrel 2302 by the annular cavity 23001, enters a lower gap 23016 matched with the mandrel 2302 by the lower bearing 2306, and simultaneously forms a static pressure air film for supporting load in the upper gap 23017 and the lower gap 23016, so that the mandrel 2302 is in a gas static pressure suspension state. Providing very low friction resistance to movement of the spindle (gas viscosity is very low, air viscosity is only one fifth thousandth of No. 10 mechanical oil at room temperature, and friction resistance of the bearing is proportional to viscosity). Secondly, the static pressure suspension state effectively eliminates contact abrasion among parts, thereby greatly prolonging the service life. And the gas flows out from the upper end of the upper gap 23017 and the lower end of the lower gap 23016 respectively to form a gas pressure protection barrier for the invasion of external cooling liquid, fine particles and other impurities, so that positive guarantee is provided for the high precision, high smoothness and high service life of the aerostatic bearing scheme.

The small shaft unit 233 includes a small shaft 23301, and a small shaft nut cover 23302, a first seal ring 23304, a first micro bearing 23305, a second micro bearing 23306, a micro inner spacer 23308, a micro outer spacer 23309, a third micro bearing 23311, a micro rear spacer 23313, a second seal ring 23312, a micro bearing sleeve 23303, a fourth micro bearing 23307, and a small shaft rear nut 23310 are sequentially mounted on the outer diameter of the small shaft 23301. In specific implementation, only one of the first micro bearing 23305 and the second micro bearing 23306 may be provided, or both may be provided. The first micro bearing 23305, the second micro bearing 23306 and the fourth micro bearing 23307 are deep groove ball bearings, the third micro bearing 23311 is a thrust ball bearing, wherein the axial load born by the small shaft 23301 is completely transmitted to the micro inner spacer 23308 through the inner ring of the first micro bearing 23305 and the inner ring of the second micro bearing 23306, and finally is completely transmitted to the third micro bearing 23311; the radial load of the small shaft 23301 is directly borne by the first micro bearing 23305, the second micro bearing 23306 and the fourth micro bearing 23307. This solution completely separates the axial load and the radial load carried by the small shaft 23301. Effectively bypass: the disadvantage of the deep groove ball bearing is that when the ball bearing bears a large axial load, a complete contact ellipse cannot be formed between the ball and the ferrule (the contact area exceeds the channel), stress concentration can be generated, and the damage of the bearing can be accelerated. The stability and the service life of the small shaft unit 233 are effectively improved.

One side mounting hole of the swing seat 209 has a certain fit clearance with the first bearing seat 29a for fine adjustment after coarse positioning. The holes are provided with 3 threaded holes along the circumferential direction, and the first cushion block 2091, the first set screw 20112, the second cushion block 20921, the second set screw 20922, the third cushion block 20931 and the third set screw 20932 are respectively arranged in the threaded holes; through adjusting first holding screw 20112, second holding screw 20922, third holding screw 20932 respectively to make first cushion 2091, second cushion 20921, third cushion 20931 follow the axial movement of screw hole that locates, and then change the radial position of first bearing frame 29a and first bearing 28a for rocking seat 209 mounting hole center, realize one side swing rotation center point fine setting, the fine setting is accomplished the bolt that the rethread first bearing frame 29a terminal surface counter bore is fixed. The other side mounting hole of the swinging seat 209 has a certain fit clearance with the second bearing 29b for fine adjustment after coarse positioning. The holes are distributed with 3 threaded holes along the circumferential direction, and the fourth cushion block 20941 and the fourth set screw 20942, the fifth cushion block 20951, the fifth set screw 20952, the sixth cushion block 20961 and the sixth set screw 20962 are respectively arranged in the threaded holes; by adjusting the fourth set screw 20942, the fifth set screw 20952 and the sixth set screw 20962 respectively, the fourth cushion block 20941, the fifth cushion block 20951 and the sixth cushion block 20961 move along the axial direction of the threaded hole, so that the radial positions of the second bearing seat 29b and the second bearing seat 28b relative to the center of the mounting hole of the swing seat 209 are changed, fine adjustment of the rotation center point of the swing at the other side is realized, and the fine adjustment is finished and then the fine adjustment is fixed through bolts in the end face counter bores of the second bearing seat 29 b. Based on the rotating center point which can be finely adjusted in the position 2, according to the two-point one-line principle, a finely adjustable rotating center line is obtained, and further, the vertical intersection of the swinging rotating center line and the axis of the main shaft can be realized by fine adjustment with a very small error (about several micrometers).

As a preferred embodiment of the invention, it may also have the following additional technical features: the first bearing 28a is incorporated in one piece with the first bearing seat 29 a; the second bearing 28b is integrated with the second bearing housing 29b as one piece. The outer ring is combined into an integral bearing with a flange shape;

the base 21 forms a box-like structure comprising a chamber 2108 through the front wall 2101, the front inclined wall 2102, the lower wall 2103, the rear wall 2104, the upper wall 2105, the right wall 2106 and the left wall 2107, and any section of the box-like structure is a closed hollow section, so that when the materials are the same, the bending rigidity and the torsional rigidity can be provided more than those of other section forms. The outer side of the right wall 2106 is provided with a right vertical rib 21061, a right inclined rib 21062 and a right transverse rib 21063, and the three ribs are radial and are intersected at the same position; the left wall outer side 2107 is provided with a left vertical rib 21071, a left inclined rib 21072 and a left transverse rib 21073, and the three ribs are radial and are intersected at the same position; the upper wall 2105 is provided with an upper right rib 21051 and an upper left rib 21052 on the outer side, which meet and form an upper suspension platform for connecting the pressure units. The rib structure scheme has the advantages that: based on the box structure, the high rigidity characteristic of the box structure can be obtained at the same time, so that important and stable-precision high rigidity support is provided for the swing seat 209 arranged on the right vertical surface 2109 and the left vertical surface 2110 and the pressure unit 23 arranged on the upper suspension table, and finally, the high stability of the relative position precision between the swing seat 209 and the pressure unit 23 is realized. The front wall 2101, the front inclined wall 2102, the lower wall 2103, the rear wall 2104, the upper wall 2105, the right wall 2106 and the left wall 2107 are provided with weight reducing holes, and the weight reducing holes may be selected as appropriate in actual operation.

The base 210 comprises a rear plate 21001, the rear plate 21001 is connected with a rear inclined plate 21002, the rear inclined plate 21002 is connected with a middle plate 21003, at least one upper opening 2100301 is formed in the upper end of the middle plate 21003, the rear inclined plate 21002 and the middle plate 21003 are intersected at a mouth bottom edge 2100303 of the upper opening 2100301, an included angle beta between the rear inclined plate 21002 and the plate surface of the middle plate 21003 is an acute angle, the middle plate 21003 is connected with a rear bottom plate 21004, and the rear bottom plate 21004 is connected with a lower rear plate 21005; in addition, the reinforced connection of the rear plate 21001, the rear sloping plate 21002 and the middle plate 21003 is realized by arranging at least one rib plate 21006; the connection position of the rear plate 21001 and the upper end of the rib plate 21006 is provided with a rear channel steel 21013. Based on the above connection state as a whole, one end of the whole is connected with the first side plate 21010, and the other end is connected with the second side plate 21011; the first side plate 21010 is provided with a first ventilation hole 2101001 and the second side plate 21011 is provided with a second ventilation hole 2101101, which serves to exchange heat between the internal relevant electrical components and the outside. The rear sloping plate 21002 is provided with at least one threading hole 21007 for the passage of a communication cable. One of the advantages of the upper end of the middle plate 21003 provided with at least one upper opening 2100301 is that an avoidance space is provided for the swing of the swing seat 209; secondly, one side of the upper opening 2100301 can be connected with the rib plate 21006, and the middle plate 21003 is provided with a mounting hole 2100302 for supporting the power unit 216, which is positioned near the joint of the rib plate 21006, so that the power unit 216 is supported in a strengthening way; because the rear plate 21001, the rear inclined plate 21002, the middle plate 21003, the rear bottom plate 21004, the lower rear plate 21005, the first side plate 21010 and the second side plate 21011 form a torsion-resistant box body structure, the structure has excellent mechanical performance and excellent torsion resistance and bending resistance, and the mechanical strength and the rigidity of the base are further improved; the torsion-resistant box body structure has a certain internal space, and the included angle beta between the rear inclined plate 21002 and the middle plate 21003 avoids the swinging interval of the swinging seat 209, so that the internal space of the box body is further enlarged, electric elements related to a lower swinging machine can be perfectly contained, a huge external electric cabinet is omitted, and the overall appearance size is more compact. The left side of the middle plate 21003 forms a left box-type structure by arranging a left top plate 21020, a left vertical plate 21021, a left bottom plate 21022 and a second side plate 21011, and the right side of the middle plate 21003 forms a right box-type structure by arranging a right top plate 21023, a right vertical plate 21024, a right bottom plate 21025 and a first side plate 21010; the front end surfaces of the left and right box structures are connected with the front plate 21012. The left box type structure and the right box type structure have excellent rigidity, and the advantage is that the torsion box structure is extended to two positions so as to strengthen the integral mechanical strength and rigidity of the base. The inner side of the front plate 21012 is provided with a strengthening groove 21008 and a front channel 21014. The front channel 21014 is erected with deck 21015 at the same time as the upper plane of the rear channel 21013, wherein each two adjacent deck 21015 and the upper part of the middle area thereof are used for supporting and connecting a group of bases 21.

The above additional technical features can be freely combined and superimposed by a person skilled in the art without conflict.

The foregoing is only a preferred embodiment of the present invention, and all technical solutions for achieving the object of the present invention by substantially the same means are included in the scope of the present invention.

Claims

1. The lower pendulum machine is characterized by comprising a base (21), wherein a pressure unit (23) and a swinging seat (209) are arranged on the base (21), and a first positioning seat (27 a) and a second positioning seat (27 b) are respectively arranged on two vertical surfaces of the base (21); the shaft end of the first positioning seat (27 a) is connected with a first bearing (28 a), and the shaft end of the second positioning seat (27 b) is connected with a second bearing (28 b);

the outer ring of the first bearing (28 a) is connected with a first bearing seat (29 a), and locking and fixing are realized through a first locking ring (26 a); the outer ring of the second bearing (28 b) is connected with a second bearing seat (29 b) and locked and fixed through a second locking ring (26 b); the first bearing (28 a) and the second bearing (28 b) are respectively arranged in positioning holes on two sides of the swinging seat (209);

the pressure unit (23) comprises a reference shaft (2301), a fixed seat (2303) is arranged above the reference shaft (2301), a lower bearing (2306) and an upper bearing (2307) are respectively arranged in positioning holes at two ends of the reference shaft (2301), a mandrel (2302) is arranged in the lower bearing (2306) and the upper bearing (2307), and the lower bearing (2306) and the upper bearing (2307) are both aerostatic bearings; also comprises a power unit (216) for driving the swinging seat (209) to swing.

2. A pendulum machine according to claim 1, further comprising a base (210), said base (210) being provided with 3 carrying units above it: the first bearing unit (24 a), the second bearing unit (24 b) and the third bearing unit (24 c) are connected with the base (21), and the first bearing unit (24 a), the second bearing unit (24 b) and the third bearing unit (24 c) all comprise at least 1 bearing body (24001).

3. A pendulum machine according to claim 1, wherein the base (21) and the pressure unit (23) are connected by a positioning flange (22), the inner bore of the positioning flange (22) being provided with a through first groove (2201); and/or, the inner hole of the swinging seat (209) is provided with a second through groove (2092).

4. A pendulum machine according to claim 1, wherein the rocking base (209) is provided with a ramp structure (2091).

5. A pendulum machine according to claim 1 or 4, wherein the power unit (216) comprises a swing motor (2161), the swing motor (2161) having an acute circumferential mounting angle α.

6. A pendulum machine according to claim 1, characterized in that a connecting rod unit (214) is connected below the swing seat (209), the connecting rod unit (214) is connected with a crank unit (215), the crank unit (215) is connected with a power unit (216), the connecting rod unit (214) comprises a connecting rod (2141), an elastic element (2144), a connecting rod head (2142) and a fastening pin (2143); one end of the link (2141) is connected to a link head (2142) through an elastic member (2144), a fastening pin (2143), the other end of the link (2141) is connected to a rocking seat (209), and the other end of the link head (2142) is connected to a crank unit (215).

7. A pendulum machine as claimed in claim 6, wherein the crank unit (215) comprises a crank frame (2151), a locking frame (2152), the crank frame (2151) being coupled to the output shaft of the power unit (216) by means of a radial clasping locking by means of the locking frame (2152), a first crank bolt (2153) and a second crank bolt (2154).

8. The lower pendulum machine according to claim 1, further comprising a main shaft unit (213) disposed in the swing seat (209), wherein the main shaft unit (213) comprises a main shaft (21301), a rear bearing (21306), a pressure ring (21307) and a spacer ring (21312) are mounted at the tail of the main shaft (21301), the left end face of an outer ring of the rear bearing (21306) is in contact with the pressure ring (21307), a plurality of counter bores are disposed in the circumferential direction of the pressure ring (21307), a main shaft spring (21308) is disposed in the counter bores, one end of the main shaft spring (21308) is connected with the pressure ring (21307), and the other end of the main shaft spring is connected with the spacer ring (21312).

9. A pendulum machine according to claim 1, wherein the holder (2303) is provided with an air channel in communication with the upper bearing (2306) and the lower bearing (2307).

10. A pendulum machine according to claim 1, wherein one side of the rocking seat (209) is connected to the first bearing (28 a) by providing at least three set screws; the other side of the swinging seat (209) is connected with the second bearing (28 b) through the arrangement of at least three set screws.

11. A pendulum machine according to claim 1, wherein the base (21) is provided with a box-like structure comprising at least one compartment (2108).

12. The lower pendulum machine according to claim 2, wherein the base (210) comprises a rear plate (21001), the rear plate (21001) is connected with a rear inclined plate (21002), the rear inclined plate (21002) is connected with a middle plate (21003), at least one upper opening (2100301) is formed in the upper end of the middle plate (21003), and the rear inclined plate (21002) and the middle plate (21003) intersect at a bottom edge (2100303) of the upper opening (2100301) and form an acute angle β.

13. A skirt machine according to claim 1, further comprising at least one of the following features:

The pressure unit (23) comprises a fixed seat (2303) and a shifting fork (2305), the fixed seat (2303) is respectively connected with a main guide shaft (2317) and a secondary guide shaft (2322), the other ends of the main guide shaft (2317) and the secondary guide shaft (2322) are connected with a connecting block (2309), the shifting fork (2305) is connected with the main guide shaft (2317) through a linear bearing (2308), and the secondary guide shaft (2322) is connected with the shifting fork (2305); or alternatively, the first and second heat exchangers may be,

the pressure unit (23) comprises an upper spring seat (2323), a lower spring seat (2324) and a spring (2325), wherein one of the upper spring seat (2323) and the lower spring seat (2324) is provided with a hole structure for positioning the outer diameter of the spring (2325), and the other is provided with a shaft structure for positioning the inner diameter of the spring (2325); or alternatively, the first and second heat exchangers may be,

the pressure unit (23) comprises a shifting fork (2305), a lower spring seat (2324) and a shifting block (2304), a fork opening of the shifting fork (2305) is arranged between the shifting block (2304) and the lower spring seat (2324), and the lower spring seat (2324) is connected with the small shaft unit (233) through a mandrel (2302);

the small shaft unit (233) comprises a small shaft (23301), at least one first miniature bearing (23305), a third miniature bearing (23311) and a fourth miniature bearing (23307) are sequentially installed on the outer diameter of the small shaft (23301), the first miniature bearing (23305) and the fourth miniature bearing (23307) are deep groove ball bearings, and the third miniature bearing (23311) is a thrust ball bearing.