CN117840777A - Low-speed heavy-load rolling and sliding composite rotary system - Google Patents
Low-speed heavy-load rolling and sliding composite rotary system Download PDFInfo
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- CN117840777A CN117840777A CN202410256631.3A CN202410256631A CN117840777A CN 117840777 A CN117840777 A CN 117840777A CN 202410256631 A CN202410256631 A CN 202410256631A CN 117840777 A CN117840777 A CN 117840777A
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- 239000002131 composite material Substances 0.000 title claims abstract description 16
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- 150000001875 compounds Chemical class 0.000 claims description 14
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 239000011324 bead Substances 0.000 claims 1
- 230000009193 crawling Effects 0.000 abstract description 8
- 230000001788 irregular Effects 0.000 abstract description 8
- 230000009191 jumping Effects 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
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- 230000005856 abnormality Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The invention discloses a low-speed heavy-load rolling and sliding composite rotary system, which comprises a large gear ring, a load guide rail and an arc guide rail which jointly support a rotary slide seat assembly; according to the low-speed heavy-load rolling and sliding composite rotary system provided by the invention, sliding friction is formed between the rotary slide seat assembly and the bull gear and the circular arc guide rail to ensure the high accuracy of the rotary slide seat assembly, and rolling friction is formed between the rotary slide seat assembly and the load guide rail; the unloading device rolls on the upper load guide rail, the first belleville spring component of the unloading device provides roller deformation compensation space, the first belleville spring component provides elastic support, the accurate placement influence on the top surfaces of the large gear ring and the circular arc guide rail of the workbench body is basically not existed, the total mass of the rotary sliding seat component and the mounting component on the rotary sliding seat component is shared, the possibility of irregular crawling phenomenon is greatly reduced, and the problems of jumping error, unsmooth rotation and difficulty in guaranteeing the rotation precision of the rotary sliding seat component are solved.
Description
Technical Field
The invention relates to the field of machine tool structures, in particular to a low-speed heavy-load rolling and sliding composite rotary system.
Background
The bevel gear is a core part of a transmission system, has the characteristics of wide-area heavy load, complex and changeable working conditions, high power density and the like, and is widely applied to the fields of aviation, vehicles, ships and the like. The bevel gear inspection machine tool is important test equipment in the bevel gear production process and is used for inspecting the meshing quality of a spiral bevel gear and a quasi-double-sided gear pair. At present, the related bevel gear detection machine tool is still at a light load level, has great limitation on the diameter and the adjustment range of a test gear, and the light load bevel gear detection machine tool is difficult to restore the real motion working condition of the bevel gear when the bevel gear is loaded, and the high-power heavy-load technology and equipment are a urgent need to overcome.
At present, in order to realize the accuracy of the test, a few heavy-load inspection machine tools are usually provided with a workbench on a sliding guide rail, so that irregular crawling phenomenon can be generated on the characteristics of the sliding guide rail under the heavy-load working state. The table board runout error is large, so that the rotation of the workbench is not smooth, the rotation precision of equipment is difficult to ensure, the rotation precision of the bevel gear shaft intersection angle is affected, and accurate testing of a high-specification bevel gear (such as an aviation grade) cannot be performed.
Disclosure of Invention
The invention mainly aims to provide a low-speed heavy-load rolling and sliding composite rotary system, and aims to solve the problems that irregular crawling phenomenon can be generated due to the characteristics of a sliding guide rail in a heavy-load working state, so that a table board is large in jumping error, the rotation of a workbench is not smooth, the rotary precision of equipment is difficult to ensure, and the rotary precision of a bevel gear shaft intersection angle is affected.
In order to achieve the above object, the present invention provides a low-speed heavy-duty rolling and sliding composite rotary system, comprising:
the lathe bed assembly comprises a lathe bed body, a large gear ring, a load guide rail and an arc guide rail, wherein a rotary centering hole is formed in the lathe bed body, and the arc guide rail, the load guide rail and the large gear ring are fixed on the lathe bed body and are sequentially arranged from inside to outside by taking the rotary centering hole as a circle center;
the rotary sliding seat assembly comprises a workbench body, four locking devices and two unloading devices, wherein one end of the workbench body in the length direction is rotatably arranged in the rotary centering hole, the four locking devices are respectively arranged on two sides of the workbench body in the length direction and correspond to the bull gear and the circular arc guide rail, the locking devices are used for forming releasable fixed connection with the bull gear or the circular arc guide rail, the length direction of the workbench body is the radial direction of the bull gear, the bottoms of the two sides of the workbench body in the length direction correspond to the load guide rail, the unloading devices are arranged in the mounting grooves and comprise roller fixing parts, rollers, first butterfly spring assemblies and fixing parts, the upper surface of the roller fixing part is connected with a sliding shaft, the roller is arranged at the lower part of the roller fixing part in a rolling way, the first belleville spring assembly comprises a lower structural ring, a first belleville spring group and an upper structural ring which are sleeved on the sliding shaft from bottom to top, the roller fixing part and the first belleville spring assembly are arranged in the mounting groove, the fixing piece is connected to the upper part of the workbench body and penetrates into the mounting groove, a guide hole column extending vertically and upwards is arranged at the bottom of the fixing piece, and the sliding shaft of the roller fixing part stretches into the guide hole column to form sliding fit, wherein the bottom surface of the workbench body is in sliding contact with the top surfaces of the large gear ring and the circular arc guide rail;
and the driving motor assembly is connected to the workbench body and meshed with the large gear ring and used for driving the rotary sliding seat assembly to rotate.
Further, the low-speed heavy-load rolling and sliding composite rotary system also comprises a centering component, a conical rotary table mounting seat and a dense ball bearing; the conical turntable mounting seat is mounted in the rotary centering hole, a conical centering mounting hole is formed in the middle shaft of the conical turntable mounting seat, the dense ball bearing is mounted on the inner wall of the centering mounting hole, and the bottom free end of the centering assembly is conical corresponding to the dense ball bearing.
Further, the driving motor assembly comprises a servo motor and an RV reducer, wherein a pinion is correspondingly arranged on an output shaft of the RV reducer, and the pinion is meshed with the large gear ring.
Further, the mounting with the workstation body forms threaded fit, unloading device still includes the cover and locates the race ring of slide shaft, race ring thickness direction be down the structure circle with gyro wheel fixed part centre gripping, wherein, the upper portion and the lower part of race ring are last bearing plate and lower bearing plate respectively, go up the bearing plate with be between the lower bearing plate bearing function portion, go up the bearing plate with the lower bearing plate is in slide shaft circumference relative rotation.
Further, a waist-shaped hole which takes the sliding shaft as a center and extends circumferentially is formed in the upper surface of the roller fixing portion, a positioning bolt is arranged corresponding to the waist-shaped hole, the positioning bolt penetrates through the upper portion of the mounting groove and stretches into the middle of the length direction of the waist-shaped hole, and the central angle of the length direction of the waist-shaped hole, which is relative to the sliding shaft, is 5-20 degrees.
Further, locking device includes structure chamber and slides and set up in the piston portion of structure intracavity, structure chamber top seals the below opening, be connected and fixed with T type screw on the piston portion, T type screw upwards wear in structure chamber and its upper end are connected with the restriction portion, restriction lower surface with be provided with second belleville spring group between the structure chamber upper surface, structure chamber upper surface is provided with leads to the inside oil pressure mouth of structure chamber, the bull gear with all be provided with T type groove on the circular arc guide rail length direction, T type screw's lower extreme set up in the T type inslot.
Further, the limiting part is in threaded connection with the T-shaped screw.
Further, the locking force between the locking device and the T-shaped slot is inversely proportional to the distance between the locking device and the swivel centring hole.
Further, the low-speed heavy-load rolling and sliding compound rotary system comprises a processor, wherein independent oil pressure passages are arranged corresponding to the oil pressure ports, and the four independent oil pressure passages are connected to the processor.
Further, a travel switch is provided on the table body at a position corresponding to the lower side of the piston portion, wherein the travel switch is not activated only when the piston portion is in the uppermost position.
According to the low-speed heavy-load rolling and sliding composite rotary system provided by the invention, sliding friction is formed between the upper surfaces of the rotary slide seat assembly and the large gear ring and the upper surface of the circular arc guide rail, so that the high accuracy of the rotary slide seat assembly is ensured, and rolling friction is formed between the rotary slide seat assembly and the load guide rail; the unloading device rolls on the upper load guide rail, the first belleville spring component of the unloading device provides roller deformation compensation space, the first belleville spring component provides elastic support, the accurate placement influence on the top surfaces of the large gear ring and the circular arc guide rail of the workbench body is basically absent, the total mass of the rotary slide seat component and the mounting component on the large gear ring, the load guide rail and the circular arc guide rail is shared, the possibility that irregular crawling phenomenon is generated by the large gear ring, the load guide rail and the circular arc guide rail is greatly reduced, the problem that the rotary slide seat component is jumping error, the rotation is unsmooth and the rotation precision is difficult to guarantee is improved, and further, accurate testing can be completed on bevel gears with various specifications.
Drawings
FIG. 1 is a schematic perspective view of a first embodiment of the present invention of a low speed, heavy duty roll-slide compound swing system;
FIG. 2 is a schematic view of a first embodiment of the present invention of a low speed, heavy duty roll-slide compound swing system in cross section through the central axis of the locking device and unloading device;
FIG. 3 is a partial enlargement of FIG. 2;
FIG. 4 is a schematic longitudinal cross-sectional view of an unloading device in a low-speed heavy-duty roll-slide composite swing system according to a first embodiment of the invention;
FIG. 5 is a schematic diagram of a first embodiment of the present invention of a low speed, heavy duty roll-slide compound swing system in cross section through a central bore of a swing centering bore.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, units, modules, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.
It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Referring to fig. 1 to 5, in an embodiment of the present invention, a low-speed heavy-duty rolling and sliding compound rotary system includes:
the lathe bed assembly 100 comprises a lathe bed 110, a large gear ring 120, a load guide rail 130 and an arc guide rail 140, wherein a rotary centering hole 150 is formed in the lathe bed 110, and the arc guide rail 140, the load guide rail 130 and the large gear ring 120 are fixed on the lathe bed 110 and are sequentially arranged from inside to outside by taking the rotary centering hole 150 as a circle center;
the rotary slide assembly 200 comprises a workbench body 210, four locking devices 220 and two unloading devices 230, wherein one end of the workbench body 210 in the length direction is rotatably arranged in the rotary centering hole 150, the four locking devices 220 are respectively arranged at two sides of the workbench body 210 in the length direction and correspond to the bull gear 120 and the circular arc guide rail 140, the locking devices 220 are used for forming releasable fixed connection with the bull gear 120 or the circular arc guide rail 140, the length direction of the workbench body 210 is the radial direction of the bull gear 120, the bottoms of the two sides of the workbench body 210 in the length direction correspond to the load guide rail 130 and are provided with mounting grooves 211, the unloading devices 230 are arranged in the mounting grooves 211, the unloading devices 230 comprise roller fixing parts 233, rollers 232, first butterfly spring assemblies and fixing pieces, the upper surface of the roller fixing part 231 is connected with a sliding shaft 234, the roller 232 is rollingly arranged at the lower part of the roller fixing part 231, the first belleville spring assembly comprises a lower structural ring 235, a first belleville spring group 236 and an upper structural ring 237 which are sleeved on the sliding shaft 234 from bottom to top, the roller fixing part 231 and the first belleville spring assembly are arranged in the mounting groove 211, the fixing piece 233 is connected at the upper part of the workbench body 210 and penetrates into the mounting groove 211, a guide hole column extending vertically upwards is arranged at the bottom of the fixing piece 233, and the sliding shaft 234 of the roller fixing part 231 stretches into the guide hole column to form sliding fit, wherein the bottom surface of the workbench body 210 is in sliding contact with the top surfaces of the large gear ring 120 and the circular arc guide rail 140;
the driving motor assembly 300 is connected to the table body 210 and engaged with the bull gear 120, and is used for driving the rotary slide assembly 200 to rotate.
In the prior art, a workbench is usually arranged on a sliding guide rail, so that irregular crawling phenomenon can be generated due to the characteristics of the sliding guide rail in a heavy load working state; the table board runout error is large, so that the rotation of the workbench is not smooth, the rotation precision of equipment is difficult to ensure, the rotation precision of the bevel gear shaft intersection angle is affected, and accurate testing of a high-specification bevel gear (such as an aviation grade) cannot be performed.
In the invention, a lathe bed assembly 100 is used as a basis of a whole low-speed heavy-load rolling and sliding composite rotary system, the lathe bed assembly 100 comprises a lathe bed 110, a large gear ring 120, a load guide rail 130 and an arc guide rail 140, a rotary centering hole 150 is formed in the lathe bed 110, and the arc guide rail 140, the load guide rail 130 and the large gear ring 120 are fixed on the lathe bed 110 and are sequentially arranged from inside to outside by taking the rotary centering hole 150 as a circle center.
The rotary slide assembly 200 includes a table body 210, four locking devices 220, and two unloading devices 230. The length direction of the table body 210 is the radial direction of the ring gear 120. One end of the table body 210 in the longitudinal direction is rotatably disposed in the rotation centering hole 150. The four locking devices 220 are respectively disposed at two sides of the length direction of the workbench body 210 and are disposed corresponding to the large gear ring 120 and the circular arc guide rail 140. The locking device 220 is used to form a releasable fixed connection with the ring gear 120 or the circular arc guide 140. The type of operation of the locking device 220 may be varied, such as electromagnetic, hydraulic or pneumatic. During operation of the table body 210, the bottom surface thereof is in sliding contact with the top surfaces of the ring gear 120 and the circular arc guide 140.
The bottom of the table body 210 on both sides in the longitudinal direction is provided with a mounting groove 211 corresponding to the load rail 130, and the unloading device 230 is provided in the mounting groove 211. The upper surface of the roller fixing portion 231 is connected with a sliding shaft 234, and the roller 232 is rollingly disposed at the lower portion of the roller fixing portion 231 to form a rolling contact stroke foundation for the unloading device 230 and the load guide rail 130. The first belleville spring assembly comprises a lower structural ring 235, a first belleville spring set 236 and an upper structural ring 237 which are sleeved on the sliding shaft 234 from bottom to top, and the lower structural ring 235 and the upper structural ring 237 ensure that the acting force of the first belleville spring set 236 is uniform and stable. The roller fixing portion 231 and the first belleville spring assembly are disposed in the mounting groove 211, the fixing piece 233 is connected to the upper portion of the workbench body 210 and enters the mounting groove 211, a guiding hole column extending vertically upwards is disposed at the bottom of the fixing piece 233, and the sliding shaft 234 of the roller fixing portion 231 extends into the guiding hole column to be in sliding fit. The top of the gear ring and the top of the circular arc guide rail 140 are scraped; correspondingly, the bottom of the workbench body 210 is also scraped corresponding to the positions of the bull gear 120 and the circular arc guide rail 140.
The unloading device 230 rolls on the upper load guide rail 130, the unloading device 230 supports the workbench body 210, and firstly, deformation compensation space can be provided through the first belleville spring assembly due to the high possibility of abrasion of the idler wheels 232; second, the first belleville spring assembly provides a resilient support that is substantially absent of the impact of the precise placement of the table body 210 on the top surfaces of the bull gear 120 and the arcuate rail 140, yet shares the total mass of the rotary carriage assembly 200 and the mounting members thereon.
The bull gear 120, the load rail 130 and the circular arc rail 140 together support the rotary carriage assembly 200, wherein sliding friction is formed between the rotary carriage assembly 200 and the upper surface of the bull gear 120 and the upper surface of the circular arc rail 140 to ensure a high accuracy of the rotary carriage assembly 200, and rolling friction is formed between the rotary carriage assembly 200 and the load rail 130. The probability of irregular crawling phenomenon of the large gear ring 120, the load guide rail 130 and the circular arc guide rail 140 of the low-speed heavy-load rolling and sliding composite rotary system is greatly reduced in a heavy-load working state. The problems of runout error, unsmooth rotation and difficulty in guaranteeing rotation precision of the rotary slide base assembly 200 are all improved, and accurate testing of bevel gears with various specifications can be further completed.
The driving motor assembly 300 is connected to the table body 210 and cooperates with the ring gear 120, and since the ring gear 120 is fixed, the driving motor assembly 300 drives the rotary slide assembly 200 to rotate when the driving motor assembly 300 is operated.
In summary, the bull gear 120, the load rail 130 and the circular arc rail 140 together support the rotary slide assembly 200, sliding friction is formed between the rotary slide assembly 200 and the upper surface of the bull gear 120 and the upper surface of the circular arc rail 140 to ensure the high accuracy of the rotary slide assembly 200, and rolling friction is formed between the rotary slide assembly 200 and the load rail 130; the unloading device 230 rolls on the upper load guide rail 130, the deformation compensation space of the roller 232 is provided by the first belleville spring assembly of the unloading device 230, the elastic support is provided by the first belleville spring assembly, the accurate placement influence on the top surfaces of the large gear ring 120 and the circular arc guide rail 140 of the workbench body 210 is basically not existed, the total mass of the rotary slide seat assembly 200 and the installation components on the rotary slide seat assembly is shared, the possibility that irregular crawling phenomena are generated by the large gear ring 120, the load guide rail 130 and the circular arc guide rail 140 is greatly reduced, the problem that the rotary slide seat assembly 200 is jumping error, the rotation is not smooth and the rotation precision is difficult to guarantee is improved, and further, the accurate test on bevel gears with various specifications can be completed.
Referring to FIG. 5, in one embodiment, the low speed, heavy duty roll-to-slip compound swing system further includes a centering assembly 160, a tapered turret mount 170, and a dense ball bearing 180; the conical turntable mounting seat 170 is mounted in the rotary centering hole 150, a central shaft of the conical turntable mounting seat 170 is a conical centering mounting hole, the inner wall of the centering mounting hole is provided with the dense ball bearing 180, and the bottom free end of the centering assembly 160 is conical corresponding to the dense ball bearing 180.
In the present embodiment, the dense ball bearing 180 is mounted on the conical turntable mounting seat 170 instead of being directly mounted on the rotary centering hole 150, and by the transition of the conical turntable mounting seat 170, the pressure action of the workbench body 210 on the rotary centering hole 150 can be reduced; accordingly, the quality of the material and the machining precision of the conical turntable mounting seat 170 can be improved, so that the position of the workbench body 210 is abnormal. The structure ensures that the workbench body 210 rotates smoothly, saves power of a motor, and improves centering performance, thereby improving rotation precision.
Referring to fig. 5, in one embodiment, the driving motor assembly 300 includes a servo motor 310 and an RV reducer 320, and an output shaft of the RV reducer 320 is correspondingly provided with a pinion gear, which is engaged with the large ring gear 120.
In this embodiment, a stable driving force is provided by the servo motor 310 with large torque and the RV reducer 320, the output shaft of the RV reducer 320 is correspondingly provided with a pinion, the pinion is meshed with the bull gear 120 to realize rotation driving, the pinion adopts a cylindrical gear with a larger modulus, and the bull gear 120 is subjected to shape modification treatment, so as to increase the contact ratio when the pinion is meshed with the bull gear 120, thereby improving rigidity and transmission efficiency. And further, the characteristics of meeting larger transmission ratio, good rigidity, reducing transmission clearance and increasing transmission efficiency are realized.
Referring to fig. 4, in one embodiment, the fixing member 233 is in threaded engagement with the table body 210, the unloading device 230 further includes a bearing ring 238 sleeved on the sliding shaft 234, and the bearing ring 238 is sandwiched between the lower structural ring 235 and the roller fixing portion 231, where an upper portion and a lower portion of the bearing ring 238 are respectively an upper bearing plate and a lower bearing plate, a bearing function portion is disposed between the upper bearing plate and the lower bearing plate, and the upper bearing plate and the lower bearing plate are rotatable relatively in a circumferential direction of the sliding shaft 234.
In this embodiment, the unloading device 230 is located on the load rail 130 during operation, so that the height of the roller fixing portion 231 is unchanged, the height of the lower structural ring 235 is unchanged, the fixing member 233 is in threaded engagement with the table body 210, and the height of the fixing member 233 is adjustable. The compression amount of the first belleville spring group 236 is increased by, for example, lowering the upper structural ring 237 by the height adjustment of the fixing member 233, and the supporting force provided by the unloading device 230 is increased. By a simple change of the fixing member 233, the working characteristics of the unloading device 230 are greatly improved, that is, the supporting force of the unloading device 230 is adjustable, and the above adjustment can be conveniently performed above the rotary slide assembly 200. The roller fixing portion 231 is enabled to rotate in the circumferential direction of the slide shaft 234 by the bearing ring 238, at which time the direction of the roller 232 is always the optimum direction (minimum resistance) during rotation of the rotary carriage assembly 200. The roller 232 is fixed in direction, and although the rotary carriage assembly 200 is rotated as a whole, the roller 232 receives a non-rolling external drag force due to the certain width of the roller 232.
In one embodiment, the upper surface of the table body 210 is provided with an upwardly extending scale corresponding to the fixing member 233.
In the present embodiment, the scale can roughly indicate the elastic force provided by the first belleville spring group 236 when the fixing member 233 is adjusted in the height direction by the reference action of the scale, and provide guidance for the operation of the fixing member 233.
In one embodiment, the upper surface of the roller fixing part 231 is provided with a waist-shaped hole extending circumferentially about the sliding shaft 234, and a positioning pin is provided corresponding to the waist-shaped hole, and extends into the middle of the waist-shaped hole in the length direction through the upper part of the mounting groove 211, wherein the central angle of the waist-shaped hole in the length direction is 5 to 20 degrees with respect to the sliding shaft 234.
The presence of the bearing ring 238, while providing flexibility, also provides a basis for abnormal rocking of the roller 232. When the roller 232 is in a large abnormal position, the operation of the driving motor assembly 300 may damage the entire unloading device 230, especially because the rotating carriage assembly 200 and the carrying device thereof have large mass, so the roller 232 is difficult to swing back. In this embodiment, the positioning bolt is matched with the waist-shaped hole to limit the swing angle of the roller fixing portion 231, that is, limit the swing angle of the roller 232, so that the occurrence of abnormality is avoided to a greater extent.
Referring to fig. 2 to 3, in one embodiment, the locking device 220 includes a structural cavity 221 and a piston portion 222 slidably disposed in the structural cavity 221, a lower opening is closed above the structural cavity 221, a T-shaped screw 223 is fixedly connected to the piston portion 222, the T-shaped screw 223 extends upward out of the structural cavity 221, a limiting portion 224 is connected to an upper end of the T-shaped screw 223, a second belleville spring set 225 is disposed between a lower surface of the limiting portion 224 and an upper surface of the structural cavity 221, an oil pressure port 226 that is communicated to an inside of the structural cavity 221 is disposed on an upper surface of the structural cavity 221, T-shaped grooves are disposed in a length direction of the bull gear 120 and the circular arc guide rail 140, and a lower end of the T-shaped screw 223 is disposed in the T-shaped grooves.
In this embodiment, a working mode of the locking device 220 is provided, when the oil pressure port 226 is not filled with high pressure oil, the T-shaped screw 223 moves upwards under the action of the second belleville spring set 225, and at this time, the T-shaped screw 223 is fixed with the T-shaped groove, and the locking device 220 locks the rotary slide seat assembly 200 to the bed assembly 100; correspondingly, when the high-pressure oil is introduced into the oil pressure port 226, the pressure provided by the high-pressure oil is greater than the elastic force provided by the second belleville spring set 225, the T-shaped screw 223 moves downwards, and at this time, the T-shaped screw 223 is separated from the T-shaped groove, and the locking device 220 no longer limits the rotation of the slide assembly 200. The above manner of locking the second belleville spring set 225 and releasing the locking device 220 by hydraulic pressure makes the process of limiting the fixed rotary slide seat assembly 200 stable, and the locking device 220 will not be interfered by the outside, for example, when the locking action of the locking device 220 is realized through a circuit, an air circuit or an oil circuit, the testing will be invalid or the accuracy will be lost when the circuit, the air circuit or the oil circuit has a problem due to long time span of the whole testing process, and the scheme in the embodiment solves the problem.
In one embodiment, the limiter 224 is threadably coupled to the T-screw 223.
In this embodiment, the limiting portion 224 is in threaded connection with the T-shaped screw 223, so that the position of the limiting portion 224 on the T-shaped screw 223 is adjustable, the compression degree of the second belleville spring set 225 is also adjustable, and the locking force provided by the locking device 220 through the second belleville spring set 225 is correspondingly adjustable.
In one embodiment, the locking force between the locking device 220 and the T-shaped slot is inversely proportional to the distance between the locking device 220 and the swivel centring hole 150.
In this embodiment, the movement of the table body 210 rotates around the rotation centering hole 150, and the force applied to the table body 210 during the working process of the table body 210 needs to consider the moment arm, which is specifically calculated as moment. To illustrate an extreme example, the two locking devices 220 at one end of the table body 210 in the width direction have very small locking forces of the locking devices 220 relatively close to the rotating centering hole 150, and the locking devices 220 relatively far from the rotating centering hole 150 have very large locking forces, and the table body 210 is acted between the two locking devices 220, so that although the entire table body 210 is fixed by the locking devices 220 relatively far from the rotating centering hole 150, the possibility of deformation of the table body 210 in the length direction is greatly increased due to the very small locking forces of the locking devices 220 relatively close to the rotating centering hole 150, and the deformation of the table body 210 may damage the ring gear 120 and the circular arc guide 140. In this embodiment, the locking force between the locking device 220 and the T-shaped slot is related to the distance between the locking device 220 and the rotating centering hole 150, and the possibility of structural torsion of the table body 210 is low regardless of where the external force applied to the table body 210 during the testing process acts on the longitudinal position. And the above arrangement does not provide for redundancy in the locking force of the locking device 220 (which could otherwise be multiple times) relative to the use of a greater locking force.
In one embodiment, the low-speed heavy-duty rolling and sliding compound rotary system comprises a processor, and independent oil pressure passages are arranged corresponding to the oil pressure ports 226, and four independent oil pressure passages are connected to the processor.
The locking force provided by the locking device 220 is very important in the application process, and can also detect abnormality while reversing the working state. In particular, in the foregoing embodiments, a manner is provided in which not all of the locking devices 220 provide the same locking force. The mode of arranging the pressure sensor at the corresponding position of the locking device 220 is adopted, so that the structural complexity is improved, the accuracy of the pressure sensor is greatly influenced by the installation effect, and meanwhile, the testing accuracy of the pressure sensor after long-time use is greatly reduced (particularly, the testing pressure is high and the pressure is maintained for a long time). Then during the course of the embodiment, a way is provided to monitor the locking force provided by the locking device 220, the second belleville spring set 225 is used to provide the locking force, and the separate oil pressure passage injects high pressure oil into the interior of the structural cavity 221 to release the locking force of the second belleville spring set 225. The independent oil pressure path responds to the locking force by calculating the oil pressure data at the moment of releasing the locking force of the second belleville spring group 225. It should be noted that the independent oil pressure passages may share one oil pressure source or each have its own oil pressure source, and when sharing one oil pressure source, the corresponding valve system needs to be adapted to realize the capability of the independent oil pressure passages to specifically provide different oil pressures. The T-shaped screw 223 moves at the moment of releasing the locking force of the second belleville spring group 225, and the movement judgment of the T-shaped screw 223 can be realized through the naked eye observation of an operator or the setting of a travel switch sensor. The above locking device 220 provides a monitoring mode of locking force, and has the characteristics of flexibility, simplicity and low failure probability.
In one embodiment, a travel switch is provided on the table body 210 at a position corresponding to a position below the piston portion 222, wherein the travel switch is not activated only when the piston portion 222 is in an uppermost position.
In this embodiment, the motion state of the piston portion 222 is obtained through the signal of the travel switch, so that the accurate time for releasing the locking force by the locking device 220 can be obtained, and the value of the locking force can be calculated by correspondingly combining the oil pressure data of the independent oil pressure passage. Specifically, when the locking device 220 is in the locked state, the piston portion 222 is in the uppermost position, and then the travel switch is not activated, and when the oil pressure of the independent oil pressure passage is gradually raised up to be greater than the elastic force provided by the second belleville spring group 225, the piston portion 222 moves downward, and at this time the travel switch is activated.
The low-speed heavy-load rolling and sliding composite rotary system provided by the invention has the advantages that the sliding friction formed between the rotary slide seat assembly 200 and the upper surface of the bull gear 120 and the upper surface of the circular arc guide rail 140 ensures the high accuracy of the rotary slide seat assembly 200, and the rolling friction is formed between the rotary slide seat assembly 200 and the load guide rail 130; the unloading device 230 rolls on the upper load guide rail 130, the deformation compensation space of the roller 232 is provided by the first belleville spring assembly of the unloading device 230, the elastic support is provided by the first belleville spring assembly, the accurate placement influence on the top surfaces of the large gear ring 120 and the circular arc guide rail 140 of the workbench body 210 is basically not existed, the total mass of the rotary slide seat assembly 200 and the installation components on the rotary slide seat assembly is shared, the possibility that irregular crawling phenomena are generated by the large gear ring 120, the load guide rail 130 and the circular arc guide rail 140 is greatly reduced, the problem that the rotary slide seat assembly 200 is jumping error, the rotation is not smooth and the rotation precision is difficult to guarantee is improved, and further, the accurate test on bevel gears with various specifications can be completed.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes using the descriptions and drawings of the present invention or directly or indirectly applied to other related technical fields are included in the scope of the invention.
Claims (10)
1. A low-speed heavy-duty roll-slip compound rotary system, comprising:
the lathe bed assembly (100) comprises a lathe bed body (110), a large gear ring (120), a load guide rail (130) and an arc guide rail (140), wherein a rotary centering hole (150) is formed in the lathe bed body (110), and the arc guide rail (140), the load guide rail (130) and the large gear ring (120) are fixed on the lathe bed body (110) and are sequentially arranged from inside to outside by taking the rotary centering hole (150) as a circle center;
the rotary sliding seat assembly (200) comprises a workbench body (210), four locking devices (220) and two unloading devices (230), one end of the workbench body (210) in the length direction is rotatably arranged in the rotary centering hole (150), the four locking devices (220) are respectively arranged on two sides of the workbench body (210) in the length direction and correspond to the bull gear (120) and the circular arc guide rail (140), the locking devices (220) are used for forming releasable fixed connection with the bull gear (120) or the circular arc guide rail (140), the length direction of the workbench body (210) is the radial direction of the bull gear (120), the bottoms of the two sides of the workbench body (210) in the length direction correspond to the load guide rail (130) and are provided with mounting grooves (211), the unloading devices (230) are arranged in the mounting grooves (211), the unloading devices (230) comprise roller fixing parts (231), rollers (232), first butterfly spring assemblies and roller fixing members (233), the upper fixing parts (234) are connected with the surfaces of the bull gear rings (120), the roller fixing parts (234) are arranged on the lower surfaces of the roller assemblies (234), and the roller fixing parts (234) are arranged on the lower disc fixing parts (234) and comprise roller fixing parts (235) The device comprises a first belleville spring group (236) and an upper structural ring (237), wherein a roller fixing part (231) and a first belleville spring assembly are arranged in a mounting groove (211), a fixing piece (233) is connected to the upper part of a workbench body (210) and penetrates into the mounting groove (211), a guide hole column extending vertically upwards is arranged at the bottom of the fixing piece (233), and a sliding shaft (234) of the roller fixing part (231) stretches into sliding fit with the guide hole column, wherein the bottom surface of the workbench body (210) is in sliding contact with the top surfaces of a large gear ring (120) and an arc guide rail (140);
and the driving motor assembly (300) is connected to the workbench body (210) and meshed with the large gear ring (120) and is used for driving the rotary sliding seat assembly (200) to rotate.
2. The low-speed, heavy-duty, roll-to-slip compound rotary system of claim 1, further comprising a centering assembly (160), a conical turntable mount (170), and a dense-bead bearing (180); the conical turntable mounting seat (170) is mounted in the rotary centering hole (150), a conical centering mounting hole is formed in the middle shaft of the conical turntable mounting seat (170), the dense ball bearing (180) is mounted on the inner wall of the centering mounting hole, and the bottom free end of the centering assembly (160) is conical corresponding to the dense ball bearing (180).
3. The low-speed heavy-duty rolling and sliding compound rotary system according to claim 1, characterized in that the driving motor assembly (300) comprises a servo motor (310) and an RV speed reducer (320), an output shaft of the RV speed reducer (320) is correspondingly provided with a pinion, and the pinion is meshed with the large gear ring (120).
4. The low-speed heavy-duty rolling and sliding composite rotary system according to claim 1, wherein the fixing piece (233) forms a threaded fit with the workbench body (210), the unloading device (230) further comprises a bearing ring (238) sleeved on the sliding shaft (234), the bearing ring (238) is clamped by the lower structural ring (235) and the roller fixing part (231) in the thickness direction, an upper bearing plate and a lower bearing plate are respectively arranged at the upper part and the lower part of the bearing ring (238), a bearing function part is arranged between the upper bearing plate and the lower bearing plate, and the upper bearing plate and the lower bearing plate can rotate relatively in the circumferential direction of the sliding shaft (234).
5. The low-speed heavy-duty rolling and sliding composite rotary system according to claim 4, wherein a waist-shaped hole extending circumferentially with the sliding shaft (234) as a center is provided on an upper surface of the roller fixing portion (231), a positioning pin is provided corresponding to the waist-shaped hole, the positioning pin extends into a middle portion of a length direction of the waist-shaped hole through an upper portion of the mounting groove (211), and a central angle of the length direction of the waist-shaped hole with respect to the sliding shaft (234) is 5 to 20 degrees.
6. The low-speed heavy-load rolling and sliding composite rotary system according to claim 1, wherein the locking device (220) comprises a structural cavity (221) and a piston part (222) arranged in the structural cavity (221) in a sliding manner, a lower opening is sealed above the structural cavity (221), a T-shaped screw (223) is fixedly connected to the piston part (222), the T-shaped screw (223) upwards penetrates through the structural cavity (221) and is connected with a limiting part (224) at the upper end of the T-shaped screw, a second butterfly spring group (225) is arranged between the lower surface of the limiting part (224) and the upper surface of the structural cavity (221), an oil pressure port (226) communicated to the inside of the structural cavity (221) is arranged on the upper surface of the structural cavity (221), T-shaped grooves are formed in the length directions of the large gear ring (120) and the circular arc guide rail (140), and the lower ends of the T-shaped screw (223) are arranged in the T-shaped grooves.
7. The low-speed, heavy-duty roll-slide compound swing system according to claim 6, wherein said limiter (224) is in threaded connection with said T-screw (223).
8. The low-speed, heavy-duty, roll-to-slip compound swing system of claim 7, wherein a locking force between said locking device (220) and said T-slot is inversely proportional to a distance between said locking device (220) and said swing centering hole (150).
9. The low-speed, heavy-duty, roll-and-slip compound swing system according to claim 7, comprising a processor, wherein separate oil pressure passages are provided corresponding to said oil pressure ports (226), four of said separate oil pressure passages being connected to said processor.
10. The low-speed, heavy-duty, roll-slide compound swing system according to claim 9, wherein a travel switch is provided on the table body (210) at a position corresponding to below the piston portion (222), wherein the travel switch is not activated only when the piston portion (222) is in the uppermost position.
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| CN202410256631.3A CN117840777B (en) | 2024-03-07 | 2024-03-07 | Low-speed heavy-load rolling and sliding composite rotary system |
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| JP2021115649A (en) * | 2020-01-23 | 2021-08-10 | 株式会社ジェイテクト | Rotary table device |
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| FR2505704A1 (en) * | 1980-05-15 | 1982-11-19 | Gage Engineering Cy A G Davis | ROTARY DIVIDER PLATE WITH MULTIPLE POSITIONS |
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| CN117840777B (en) | 2024-06-07 |
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