CN114055190A - Cam type roller turntable structure and manufacturing method thereof - Google Patents
Cam type roller turntable structure and manufacturing method thereof Download PDFInfo
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- CN114055190A CN114055190A CN202111370139.1A CN202111370139A CN114055190A CN 114055190 A CN114055190 A CN 114055190A CN 202111370139 A CN202111370139 A CN 202111370139A CN 114055190 A CN114055190 A CN 114055190A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/25—Movable or adjustable work or tool supports
- B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
- B23Q1/50—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
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Abstract
The invention provides a cam type roller turntable structure and a manufacturing method thereof, wherein the cam type roller turntable structure comprises a rotating wheel, a plurality of rollers, a cam, an eccentric adjusting ring, an eccentric nut, a cam side gear and a motor side gear, wherein the rollers are fixedly arranged on the circumferential wall of the rotating wheel, and the rotating shaft and the rotating wheel are radially superposed; the rolling needle or the rolling ball is integrally formed by a material for reducing the rolling friction coefficient, or the surface of the rolling needle or the rolling ball is modified by the material for reducing the rolling friction coefficient, and/or the surface of the shaft core and/or the outer ring is formed by the material for reducing the rolling friction coefficient. The cam type roller turntable structure resists large torque slip, and the problem of rolling friction heat generation is reduced by using a material for reducing the rolling friction coefficient inside the roller.
Description
Technical Field
The invention relates to a cam type roller turntable structure, in particular to a cam type roller turntable structure and a manufacturing method thereof, and belongs to the field of worm transmission.
Background
Currently, the turntable is commonly used in a processing machine as a fourth shaft of the processing machine. The rotary table of the original worm and worm wheel type structure has low transmission efficiency, low rotation precision and complex later maintenance and adjustment. The main defects are that the transmission of the worm and the worm wheel is direct friction of iron and is sliding friction, and the transmission efficiency loss is large; after the worm gear is used for a long time, large abrasion can be generated, and the abraded worm and worm gear part can generate a large reverse gap, so that the product precision can be influenced. In order to improve the problems, the prior art changes the original worm and worm gear structure into a roller cam structure. Therefore, the structure of the roller and the cam is used, and the outer surface of the roller and the cam surface are in rolling friction, so that the structure is high in transmission efficiency, small in abrasion loss and long in service life. And the structure adopts a prepressing mode during assembly, and the surface of the cam is tightly attached to the surface of the roller, so that the structure basically has no reverse clearance and has high product precision.
However, although no reverse clearance exists, the roller and worm-turbine interface may still have the potential to slip relative to each other if the transmission torque is high, thereby reducing transmission efficiency. On the other hand, because the contact surface between the needle roller and the ball of the general bearing is larger than that between the needle roller and the shaft core and the outer ring, large-area friction heat is inevitably caused after the roller and the ball are subjected to rotational friction, so that the physical expansion of the surface of the material can be caused, and at least two effects can be caused. First, undesirable additional rolling resistance is created between the needles and the core and outer race, and second, frictional heat is transferred to the cam surfaces causing the cam surfaces to engage the roller surfaces too tightly, causing undesirable additional resistive torque to be generated as the rotating wheel rotates. It appears therefore that the close abutment of the cam surfaces with the roller surfaces and the lack of prior art details regarding the rotational frictional heating caused by the needle configuration in the roller are two factors contributing to the above-mentioned problems.
Disclosure of Invention
In order to solve the problems of the two aspects, the invention is considered from three aspects, namely, the improvement of the structure of the contact surface of the cam surface and the roller surface, and the improvement of the structure of the needle roller and the surface composition structure of the needle roller.
Specifically, according to a first aspect of the present invention, there is provided a cam roller turret structure comprising a rotary wheel; the rollers are fixedly arranged on the circumferential wall of the rotating wheel, and the rotating shafts of the rollers are radially overlapped with the rotating wheel; the cam is meshed with at least part of the rollers on the circumferential wall of the rotating wheel, an eccentric adjusting ring and an eccentric nut are arranged at two ends of the cam, a cam side gear is further arranged at one end of the cam, and a motor side gear is installed on one side of the cam side gear in a matched mode; wherein the rollers comprise roller bearings comprising needle rollers or balls, and a core and an outer race; the outer ring is sleeved outside the shaft core, and the roller pins or the balls are arranged between the shaft core and the outer ring; the rolling needle or the rolling ball is integrally formed by a material for reducing the rolling friction coefficient, or the surface of the rolling needle or the rolling ball is modified by the material for reducing the rolling friction coefficient, and/or the surface of the shaft core and/or the outer ring, which is in contact with the rolling needle or the rolling ball, is formed by the material for reducing the rolling friction coefficient.
According to another aspect of the present invention, there is provided a cam-type turntable structure with a fractal contact surface, comprising a rotating wheel, a plurality of rollers fixedly mounted on a circumferential wall of the rotating wheel and having a rotating shaft radially coinciding with the rotating wheel, a cam, an eccentric adjusting ring, an eccentric nut, a cam-side gear, a motor-side gear, wherein the rollers comprise roller bearings comprising needle rollers or balls, and a shaft core and an outer ring; the whole of the roller pin or the ball is made of a material for reducing the rolling friction coefficient, or the surface of the roller pin or the ball is modified with the material for reducing the rolling friction coefficient, and/or the surface of the shaft core and/or the outer ring, which is in contact with the roller pin or the ball, is made of the material for reducing the rolling friction coefficient; and the outer ring of the roller bearing and the cam surface of the cam have fractal structures matched with each other.
Preferably, the outflow end of the outlet pipe and the inflow end of the inlet pipe are connected with a suction pipe, two ends of which are provided with sealing bearings, the outflow end of the outlet pipe and the inflow end of the inlet pipe are respectively and fixedly connected with outer rings of the sealing bearings at two ends of the suction pipe, the suction pipe is fixedly connected with a shaft core of the sealing bearing in a sealing manner, or the outflow end of the outlet pipe and the inflow end of the inlet pipe are respectively and fixedly connected with shaft cores of the sealing bearings at two ends of the suction pipe, and the suction pipe is fixedly connected with the outer rings of the sealing bearings in a sealing manner. It will be appreciated that the rolling frictional heating in the sealed bearing herein can be carried away by the circulating gas or liquid in the location where it is located, while the heat transfer to the rollers is greatly reduced.
Preferably, an inner wall of at least one of the outlet tube, the introduction tube, and the suction tube has a spiral embossment.
The material for reducing the rolling friction coefficient of at least one of the surfaces of the rolling needles or the rolling balls and the surfaces of the shaft core and the outer ring in the roller bearing comprises any one or combination of graphite, graphene, molybdenum disulfide, and teflon material doped with molybdenum disulfide.
Optionally, the roller pin or the ball is integrally formed by a teflon material doped with molybdenum disulfide, and/or a sleeve formed by the teflon material doped with molybdenum disulfide is fixedly sleeved on the surface of the shaft core and/or the outer ring of the roller bearing, which is in contact with the roller pin or the ball, so that the rolling friction heat is further reduced.
Optionally, the roller turret structure further comprises: the device comprises a first box body and a second box body, wherein the second box body is positioned at the rear side of the first box body; the cam is arranged in the first box body;
a driving motor is arranged in the second box body, a motor shaft of the driving motor is parallel to a cam shaft of the cam, the motor shaft of the driving motor penetrates through the first box body, and the motor shaft penetrates through the second box body to be in transmission connection with the motor side gear; one end of a cam shaft of the cam is in transmission connection with the cam side gear; the driving motor drives the motor side gear and the cam side gear to rotate in sequence so as to drive the cam to rotate.
Optionally, the roller turntable structure further comprises a brake part coaxially arranged with the rotating wheel, and the brake part is arranged at one end of the rotating shaft of the rotating wheel; the brake part is provided with an outer shell, and a rotating shaft of the rotating wheel is rotatably connected with the outer shell;
the cam shaft of the cam is rotatably connected with the outer shell, one end of the cam shaft is provided with a cam shaft end cover flange, and the scheme of the cam shaft end cover is fixedly connected with the outer shell;
the brake part comprises a base and at least one brake disc, and the brake disc is provided with a position avoiding hole; the base with be formed with the piston room between the brake disc, gliding piston from top to bottom has in the piston room, the base is equipped with hydraulic pressure passageway, and outside hydraulic system via hydraulic pressure passageway connects the piston room, but the brake disc cover is established outside the rotation axis of swiveling wheel to the rotation axis is braked under outside hydraulic system's control.
In one embodiment, the outer ring of the roller bearing and the cam surface of the cam have a fractal structure matched with each other, and the analysis structure is a multi-stage fractal structure; the fractal structure is formed according to the following steps:
s1, processing a cam model, wherein two ends of the cam model penetrate into an eccentric adjusting ring P4, two ends of the cam model are sleeved with bearings, a cam side gear P6 is fixedly arranged at one end of one side of the bearing close to the cam, a motor side gear P7 is arranged at one side of the cam side gear P6 and the cam side gear P6 in a matching way,
s2, after an eccentric screw cap P5 is embedded in the eccentric adjusting ring P4, the eccentric adjusting ring P4 is integrally installed on the base of the rotary table, so that a roller P2 on the rotary wheel P1 is in close contact with the cam surface of the cam model, one of the rollers which is already in contact with the cam surface is selected, and materials are traced at equidistant points on the surface of the outer ring of the roller bearing in the direction parallel to the axis of the outer ring to form material points; preferably, the diameter of the material point is 1-10mm, the thickness is 0.1-0.2mm, and the tracer material is pigment or slurry;
s3, making all rollers contacting the cam surface rotate for at least one circle along with the rotating wheel P1, generating the track of the tracer material on the surface of the outer ring and the cam surface due to rolling, and making a processing drawing;
s4, processing each roller bearing outer ring based on the track of the outer ring surface in the processing drawing to form a fractal structure of the outer ring surface and a cam P3, wherein the cam P3 is provided with a cam surface of the fractal structure matched with the fractal structure of the outer ring surface. Preferably, the machined fractal structure penetrates into the surface of the outer ring and the cam surface to a uniform depth of 1-5 mm.
Alternatively, after the cam model is processed at step S1, the material is traced on the cam surface of the cam model at equally spaced points in the direction perpendicular to the cam shaft before both ends of the cam model penetrate into the eccentric adjustment ring P4; preferably, the diameter of the material dot is 1-10mm, the thickness is 0.1-0.2mm, the tracer material is pigment or slurry, and in this case, in step S2, the eccentric adjusting ring P4 is inserted into the eccentric nut P5 between the bearing and the eccentric adjusting ring, and then the whole is mounted on the base of the turntable, so that the roller P2 on the rotating wheel P1 is in close contact with the cam surface of the cam model. I.e. no longer on equally spaced points on the surface of the outer ring of the roller bearing in a direction parallel to the axis of the outer ring.
It will be appreciated that where the region of the outer race surface track is a projection, the region of the track on the corresponding cam surface is a recess, or vice versa, preferably the analysis structure is a multi-level fractal structure.
The invention also provides a manufacturing method of the cam type roller turntable structure, which comprises the following steps:
s1, processing a cam model, wherein two ends of the cam model penetrate into an eccentric adjusting ring P4, two ends of the cam model are sleeved with bearings, a cam side gear P6 is fixedly arranged at one end of one side of the bearing close to the cam, a motor side gear P7 is arranged at one side of the cam side gear P6 and the cam side gear P6 in a matching way,
s2, after an eccentric screw cap P5 is embedded in the eccentric adjusting ring P4, the eccentric adjusting ring P4 is integrally installed on the base of the rotary table, so that a roller P2 on the rotary wheel P1 is in close contact with the cam surface of the cam model, one of the rollers which is already in contact with the cam surface is selected, and materials are traced at equidistant points on the surface of the outer ring of the roller bearing in the direction parallel to the axis of the outer ring to form material points; preferably, the diameter of the material point is 1-10mm, the thickness is 0.1-0.2mm, and the tracer material is pigment or slurry;
s3, making all rollers contacting the cam surface rotate for at least one circle along with the rotating wheel P1, generating the track of the tracer material on the surface of the outer ring and the cam surface due to rolling, and making a processing drawing;
s4, processing each roller bearing outer ring based on the track of the outer ring surface in the processing drawing to form a fractal structure of the outer ring surface and a cam P3, wherein the cam P3 is provided with a cam surface of the fractal structure matched with the fractal structure of the outer ring surface. Preferably, the depth of the processed fractal structure penetrating into the surface of the outer ring and the cam surface is uniform and is 1-5 mm;
s5, the cam model is detached and the machined cam P3 is replaced according to the steps S1-S2, and the manufacturing is completed.
Alternatively, after the cam model is processed at step S1, the material is traced on the cam surface of the cam model at equally spaced points in the direction perpendicular to the cam shaft before both ends of the cam model penetrate into the eccentric adjustment ring P4; preferably, the diameter of the material dot is 1-10mm, the thickness is 0.1-0.2mm, the tracer material is pigment or slurry, and in this case, in step S2, the eccentric adjusting ring P4 is inserted into the eccentric nut P5 between the bearing and the eccentric adjusting ring, and then the whole is mounted on the base of the turntable, so that the roller P2 on the rotating wheel P1 is in close contact with the cam surface of the cam model. I.e. no longer on equally spaced points on the surface of the outer ring of the roller bearing in a direction parallel to the axis of the outer ring.
The split-type structure of the contact surface between the cam surface and the roller surface increases the contact area between the cam surface and the roller surface, and prevents large-torque slipping; secondly, the surface of the needle roller or ball bearing, and/or the surface of the shaft core and/or the outer ring are provided with materials for reducing the rolling friction coefficient, thereby reducing the problem of heat generation caused by the rolling friction.
Drawings
FIG. 1 shows a front cross-sectional view of a cam roller turret configuration of an embodiment of the invention;
fig. 2 shows a schematic structural diagram of the inner structure of a roller bearing fixedly sleeved with a teflon material sleeve doped with molybdenum disulfide according to an embodiment of the present invention;
fig. 3a is a schematic diagram illustrating tracer material forming material dots on a surface dot of an outer ring of a roller bearing during a fractal structure forming process according to an embodiment of the present invention;
FIG. 3b is a schematic diagram showing tracks formed on the surface of the outer ring of the roller bearing after the outer ring of the roller bearing contacts the cam surface and rotates with the rotating wheel for three revolutions during the forming of the fractal structure according to the embodiment of the present invention;
figure 4 shows a schematic view of a part of the construction of a turntable of a wheeled roller according to an embodiment of the invention;
fig. 5 is a partial schematic front view of a wheeled roller turret structure according to an embodiment of the present invention.
Reference numeral, 1-cam roller turret arrangement.
Detailed Description
As shown in fig. 1 and 4, an embodiment of the present invention provides a cam roller turntable structure 1, which includes a rotating wheel P1, a plurality of rollers fixedly mounted on a circumferential wall of the rotating wheel P1 and having a rotating shaft radially coinciding with the rotating wheel P1, a cam P3 engaged with at least a portion of the rollers on the circumferential wall of the rotating wheel P1, an eccentric adjusting ring P4 and an eccentric nut P5 embedded in the eccentric adjusting ring P4 provided at two ends of the cam P3, a cam side gear P6 provided at one end of the cam P3, and a motor side gear P7 provided at one side of the cam side gear P6.
The rollers comprise a roller bearing P2, the roller bearing P2 comprises balls (shown in figure 2, wherein an arrow indicates the relative rotation movement direction of the surface of the outer ring of the roller bearing and the cam surface), an axle core with a hollow part, and a roller bearing outer ring fixedly sleeved with an outer ring sleeve made of Teflon material doped with molybdenum disulfide; the outer ring is sleeved outside the shaft core, and the roller pins or the balls are arranged between the shaft core and the outer ring; the surface of the ball is modified with molybdenum disulfide powder. The rolling needle or the rolling ball is integrally formed by a material for reducing the rolling friction coefficient, or the surface of the rolling needle or the rolling ball is modified by the material for reducing the rolling friction coefficient, and/or the surface of the shaft core and/or the outer ring, which is in contact with the rolling needle or the rolling ball, is formed by the material for reducing the rolling friction coefficient. Roller bearing P2 relies primarily on rolling contact between elements to support rotating parts. Wherein, the rolling needle or ball is evenly arranged between the axle core and the outer ring as the roller bearing P2, optionally, a retainer can be arranged in the roller bearing P2 to evenly separate the rolling bodies, guide the rolling bodies to move on the right track, and improve the load distribution and the lubricating performance in the bearing. The cam type roller turntable structure provided by the embodiment can resist large torque slip, and can effectively reduce the problem of heat generation of rolling friction by using a material for reducing the rolling friction coefficient in the roller.
Alternatively, there is a fractal structure of the co-operation between the outer ring sleeve of the plurality of roller bearings and the precise cam surface of the cam P3, and the fractal structure in this embodiment may be formed as follows:
s1, processing a cam model, wherein two ends of the cam model penetrate into an eccentric adjusting ring P4, two ends of the cam model are sleeved with bearings, a cam side gear P6 is fixedly installed at one end, close to a cam, of one side bearing, and a motor side gear P7 is installed at one side of the cam side gear P6 in a matched mode with the cam side gear P6;
s2, the eccentric adjusting ring P4 is embedded into the eccentric screw cap P5 and then is integrally installed on the base of the turntable (as shown in figure 1), so that the rollers P2 on the rotating wheel P1 are in close contact with the cam surfaces of the cam model, one of the rollers which is already in contact with the cam surface is selected, and pigment is coated on the surface of the outer ring of the roller bearing at equal intervals in the direction parallel to the axis of the outer ring to form material dots (as shown in figure 3 a); the diameter of the material point is 5mm, and the thickness of the material point is 0.1 mm;
s3, making all the rollers contacting the cam surface rotate three times with the rotating wheel P1, and generating the paint track on the outer ring surface (as shown in figure 3 b) and the cam surface caused by rolling, and making the processing drawing;
s4, processing each roller bearing outer ring based on the track of the outer ring surface in the processing drawing to form a fractal structure of the outer ring surface and a cam P3, wherein the cam P3 is provided with a cam surface of the fractal structure matched with the fractal structure of the outer ring surface. The depth of the processed fractal structure penetrating into the surface of the outer ring and the cam surface is uniform, and the depth is 3 mm. Fig. 5 is a partial schematic front view of a wheeled roller turret structure according to an embodiment of the present invention, illustrating a cam surface and a strip fractal structure of the outer ring surface of a roller bearing.
Alternatively, after the cam model is processed at step S1, the material is traced on the cam surface of the cam model at equally spaced points in the direction perpendicular to the cam shaft before both ends of the cam model penetrate into the eccentric adjustment ring P4; preferably, the diameter of the material dot is 1-10mm, the thickness is 0.1-0.2mm, the tracer material is pigment or slurry, and in this case, in step S2, the eccentric adjusting ring P4 is inserted into the eccentric nut P5 between the bearing and the eccentric adjusting ring, and then the whole is mounted on the base of the turntable, so that the roller P2 on the rotating wheel P1 is in close contact with the cam surface of the cam model. I.e. no longer on equally spaced points on the surface of the outer ring of the roller bearing in a direction parallel to the axis of the outer ring.
It will be appreciated that where the region of the outer race surface track is a projection, the region of the track on the corresponding cam surface is a recess, or vice versa, preferably the analysis structure is a multi-level fractal structure. It can be understood that due to the existence of the fractal structure, the contact area between the cam surface and the outer ring of the roller is enlarged, so that the friction between the cam surface and the outer ring of the roller is increased, and meanwhile, due to the action of the material for reducing the rolling friction coefficient between the roller pin and the shaft core and between the roller pin and the outer ring, the friction heat is reduced besides the rolling is more flexible, so that the phenomenon that the fractal structure is excessively closely matched due to thermal expansion is avoided. Since the fractal structure has a large contact surface, the contact area is not excessively reduced even if left and right gaps are present in the fractal structure, so that the significance of adjusting the left and right eccentric nuts to keep the contact surfaces from being too tight or too loose becomes less important (if the possibility of further enlarging the contact area in the left and right gaps can be avoided, the significance still exists to some extent), and thus the eccentric nuts can even be omitted. The selection of the balls can further reduce the contact area with the shaft core and the outer ring of the roller bearing, thereby further reducing the friction heat generation area. In addition, even if the rolling balls are adopted to replace the rolling needles, the height of the cylindrical surface of the outer ring of the roller bearing can be reduced, but due to the guarantee of the fractal structure, the area of the actual contact cam surface cannot be reduced too much or even increased.
Optionally, the roller pin or the ball is integrally formed by a teflon material doped with molybdenum disulfide, and/or a sleeve formed by the teflon material doped with molybdenum disulfide is fixedly sleeved on the surface of the shaft core and/or the outer ring of the roller bearing, which is in contact with the roller pin or the ball, so that the rolling friction heat is further reduced.
Optionally, the roller turntable structure provided in this embodiment may further include: the device comprises a first box body and a second box body, wherein the second box body is positioned at the rear side of the first box body; the cam is arranged in the first box body; a driving motor is arranged in the second box body, a motor shaft of the driving motor is parallel to a cam shaft of the cam, the motor shaft of the driving motor penetrates through the first box body, and the motor shaft penetrates through the second box body to be in transmission connection with the motor side gear; one end of a cam shaft of the cam is in transmission connection with the cam side gear; the driving motor drives the motor side gear and the cam side gear to rotate in sequence so as to drive the cam to rotate.
Optionally, the roller turntable structure further comprises a brake part coaxially arranged with the rotating wheel, and the brake part is arranged at one end of the rotating shaft of the rotating wheel; the brake part is provided with an outer shell, and a rotating shaft of the rotating wheel is rotatably connected with the outer shell; the cam shaft of the cam is rotatably connected with the outer shell, a cam shaft end cover flange is arranged at one end of the cam shaft, and the cam shaft end cover scheme is fixedly connected with the outer shell. The brake part comprises a base and at least one brake disc, and the brake disc is provided with a position avoiding hole; a piston chamber is formed between the base and the brake disc, a piston capable of sliding up and down is arranged in the piston chamber, a hydraulic channel is arranged on the base, and an external hydraulic system is connected with the piston chamber through the hydraulic channel. The brake disc can be sleeved outside the rotating shaft of the rotating wheel so as to brake the rotating shaft under the control of an external hydraulic system. The brake part can set up on first box, can lock the swiveling wheel through setting up the brake part and process spare part with at fixed angle.
The embodiment of the invention also provides a manufacturing method of the cam type roller turntable structure, which comprises the following steps:
s1, processing a cam model, applying slurry on the cam surface of the cam model at equal intervals in the direction vertical to the cam shaft, penetrating the two ends of the cam model into an eccentric adjusting ring P4, sleeving a bearing on the two ends of the cam model, fixedly installing a cam side gear P6 at one end of one side bearing close to the cam, installing a motor side gear P7 at one side of the cam side gear P6 and the cam side gear P6 in a matching way,
s2, the eccentric adjusting ring P4 is embedded into the eccentric nut P5 and then is integrally installed on the turntable base (as shown in figure 1), so that the roller P2 on the rotating wheel P1 is in close contact with the cam surface of the cam model;
s3, making all the rollers contacting the cam surface rotate for three circles along with the rotating wheel P1, generating the tracks of the slurry on the outer ring surface (as shown in figure 3 b) and the cam surface due to rolling, and making a processing drawing;
s4, processing each roller bearing outer ring based on the track of the outer ring surface in the processing drawing to form a fractal structure of the outer ring surface and a cam P3, wherein the cam P3 is provided with a cam surface of the fractal structure matched with the fractal structure of the outer ring surface. Preferably, the depth of the processed fractal structure penetrating into the surface of the outer ring and the cam surface is uniform, and the depth is 5 mm;
s5, the cam model is detached and the machined cam P3 is replaced according to the steps S1-S2, and the manufacturing is completed.
Alternatively, after the cam model is processed at step S1, the material is traced on the cam surface of the cam model at equally spaced points in the direction perpendicular to the cam shaft before both ends of the cam model penetrate into the eccentric adjustment ring P4; preferably, the diameter of the material dot is 1-10mm, the thickness is 0.1-0.2mm, the tracer material is pigment or slurry, and in this case, in step S2, the eccentric adjusting ring P4 is inserted into the eccentric nut P5 between the bearing and the eccentric adjusting ring, and then the whole is mounted on the base of the turntable, so that the roller P2 on the rotating wheel P1 is in close contact with the cam surface of the cam model. I.e. no longer on equally spaced points on the surface of the outer ring of the roller bearing in a direction parallel to the axis of the outer ring.
The split-type structure of the contact surface between the cam surface and the roller surface increases the contact area between the cam surface and the roller surface, and prevents large-torque slipping; secondly, the surface of the needle roller or ball bearing, and/or the surface of the shaft core and/or the outer ring are provided with materials for reducing the rolling friction coefficient, thereby reducing the problem of heat generation caused by the rolling friction.
Claims (8)
1. A cam roller turret structure, comprising:
a rotating wheel;
the rollers are fixedly arranged on the circumferential wall of the rotating wheel, and the rotating shafts of the rollers are radially overlapped with the rotating wheel;
the cam is meshed with at least part of the rollers on the circumferential wall of the rotating wheel, an eccentric adjusting ring and an eccentric nut are arranged at two ends of the cam, a cam side gear is further arranged at one end of the cam, and a motor side gear is installed on one side of the cam side gear in a matched mode;
wherein the roller comprises a roller bearing; the roller bearing comprises a rolling needle or a rolling ball, a shaft core and an outer ring; the outer ring is sleeved outside the shaft core, and the roller pins or the balls are arranged between the shaft core and the outer ring; the rolling needle or the rolling ball is integrally formed by a material for reducing the rolling friction coefficient, or the surface of the rolling needle or the rolling ball is modified by the material for reducing the rolling friction coefficient, and/or the surface of the shaft core and/or the outer ring, which is in contact with the rolling needle or the rolling ball, is formed by the material for reducing the rolling friction coefficient.
2. The cam roller turret structure according to claim 1, wherein the material for reducing the rolling friction coefficient of at least one of the surface of the needle roller or the ball roller in the roller bearing and the surface of the shaft core and the outer ring in contact with the needle roller or the ball roller comprises any one of graphite, graphene, molybdenum disulfide, teflon material doped with molybdenum disulfide, or a combination thereof; alternatively, the first and second electrodes may be,
the roller pin or the ball is integrally formed by a Teflon material doped with molybdenum disulfide, and/or a sleeve formed by the Teflon material doped with molybdenum disulfide is fixedly sleeved on the surface of the shaft core and/or the outer ring of the roller bearing, which is in contact with the roller pin or the ball.
3. The cam roller turret structure according to claim 1, further comprising: the device comprises a first box body and a second box body, wherein the second box body is positioned at the rear side of the first box body; the cam is arranged in the first box body;
a driving motor is arranged in the second box body, a motor shaft of the driving motor is parallel to a cam shaft of the cam, the motor shaft of the driving motor penetrates through the first box body, and the motor shaft penetrates through the second box body to be in transmission connection with the motor side gear; one end of a cam shaft of the cam is in transmission connection with the cam side gear; the driving motor drives the motor side gear and the cam side gear to rotate in sequence so as to drive the cam to rotate.
4. The cam roller turret structure according to claim 1,
the roller turntable structure further comprises a brake part which is coaxial with the rotating wheel, and the brake part is arranged at one end of the rotating shaft of the rotating wheel; the brake part is provided with an outer shell, and a rotating shaft of the rotating wheel is rotatably connected with the outer shell;
the cam shaft of the cam is rotatably connected with the outer shell, one end of the cam shaft is provided with a cam shaft end cover flange, and the scheme of the cam shaft end cover is fixedly connected with the outer shell;
the brake part comprises a base and at least one brake disc, and the brake disc is provided with a position avoiding hole; the base with be formed with the piston room between the brake disc, gliding piston from top to bottom has in the piston room, the base is equipped with hydraulic pressure passageway, and outside hydraulic system via hydraulic pressure passageway connects the piston room, but the brake disc cover is established outside the rotation axis of swiveling wheel to the rotation axis is braked under outside hydraulic system's control.
5. The cam-type roller turret structure according to any of claims 1-4, wherein there is a fractal structure of the outer race of the roller bearing and the cam surface of the cam that are fitted to each other; the analysis structure is a multi-stage fractal structure, and the fractal structure is formed according to the following steps:
s1, processing a cam model, wherein two ends of the cam model penetrate into an eccentric adjusting ring, two ends of the cam model are sleeved with bearings, a cam side gear is fixedly installed at one end, close to a cam, of one side bearing, and a motor side gear is installed at one side of the cam side gear in a matched mode with the cam side gear;
s2, after an eccentric nut is embedded between the eccentric adjusting ring and the bearing, the eccentric adjusting ring and the bearing are integrally installed on a turntable base, so that the rollers on the rotating wheel are in close contact with the cam surfaces of the cam model, one of the rollers which is in contact with the cam surfaces is selected, and materials are traced on equidistant points on the surface of the outer ring of the roller bearing in the direction parallel to the axis of the outer ring to form material points; the diameter of the material point is 1-10mm, the thickness is 0.1-0.2mm, and the tracer material is pigment or slurry;
s3, making all rollers contacting the cam surface rotate at least one circle with the rotating wheel, generating the trace of the tracer material on the outer ring surface and the cam surface due to rolling, and making a processing drawing;
and S4, processing each roller bearing outer ring based on the track of the outer ring surface in the processing drawing to form a fractal structure of the outer ring surface and a processing cam, wherein the cam is provided with a cam surface of the fractal structure matched with the fractal structure of the outer ring surface, and the processed fractal structure penetrates into the outer ring surface, the depth of the cam surface is uniform, and the depth is 1-5 mm.
6. The cam-type roller turret structure according to claim 5, wherein after the cam pattern is machined at step S1, the material is traced on the cam surface of the cam pattern at equally spaced points in a direction perpendicular to the cam shaft before both ends of the cam pattern are inserted into the eccentric adjusting ring; the diameter of the material point is 1-10mm, the thickness is 0.1-0.2mm, the tracer material is pigment or slurry, and at the moment, in step S2, an eccentric nut is embedded between an eccentric adjusting ring and a bearing and then integrally installed on a turntable base, so that a roller on a rotating wheel is in close contact with a cam surface of a cam model.
7. A method of manufacturing a cam roller turret structure according to any of claims 1-6, comprising the steps of:
s1, processing a cam model, wherein two ends of the cam model penetrate into an eccentric adjusting ring, two ends of the cam model are sleeved with bearings, a cam side gear is fixedly installed at one end, close to a cam, of one side bearing, and a motor side gear is installed at one side of the cam side gear in a matched mode with the cam side gear;
s2, after an eccentric nut is embedded between the eccentric adjusting ring and the bearing, the eccentric adjusting ring and the bearing are integrally installed on a turntable base, so that the rollers on the rotating wheel are in close contact with the cam surfaces of the cam model, one of the rollers which is in contact with the cam surfaces is selected, and materials are traced on equidistant points on the surface of the outer ring of the roller bearing in the direction parallel to the axis of the outer ring to form material points; the diameter of the material point is 1-10mm, the thickness is 0.1-0.2mm, and the tracer material is pigment or slurry;
s3, making all rollers contacting the cam surface rotate at least one circle with the rotating wheel, generating the trace of the tracer material on the outer ring surface and the cam surface due to rolling, and making a processing drawing;
and S4, processing each roller bearing outer ring based on the track of the outer ring surface in the processing drawing to form a fractal structure of the outer ring surface and a cam, wherein the cam is provided with a cam surface of the fractal structure matched with the fractal structure of the outer ring surface. Preferably, the depth of the processed fractal structure penetrating into the surface of the outer ring and the cam surface is uniform and is 1-5 mm;
s5, the cam model is detached, and the machined cam is replaced according to the steps S1-S2, and the manufacturing is completed.
8. The manufacturing method according to claim 7, wherein after the cam pattern is processed in step S1, before both ends of the cam pattern are inserted into the eccentric adjustment ring, the material is traced on the cam surface of the cam pattern at equally spaced points in a direction perpendicular to the cam shaft; the diameter of the material point is 1-10mm, the thickness is 0.1-0.2mm, the tracer material is pigment or slurry, and at the moment, in step S2, an eccentric nut is embedded between an eccentric adjusting ring and a bearing and then integrally installed on a turntable base, so that a roller on a rotating wheel is in close contact with a cam surface of a cam model.
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| CN116984907A (en) * | 2023-09-27 | 2023-11-03 | 成都中良川工科技有限公司 | Numerical control rotary table |
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| CN116984907B (en) * | 2023-09-27 | 2023-12-22 | 成都中良川工科技有限公司 | Numerical control rotary table |
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| CN114055190B (en) | 2022-07-19 |
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