CN107202157B - Pipe bending machine and gear transmission device thereof - Google Patents
Pipe bending machine and gear transmission device thereof Download PDFInfo
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- CN107202157B CN107202157B CN201710536321.7A CN201710536321A CN107202157B CN 107202157 B CN107202157 B CN 107202157B CN 201710536321 A CN201710536321 A CN 201710536321A CN 107202157 B CN107202157 B CN 107202157B
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- 238000005452 bending Methods 0.000 title claims abstract description 44
- 230000005540 biological transmission Effects 0.000 title claims abstract description 37
- 230000007704 transition Effects 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims description 11
- 238000001125 extrusion Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000003638 chemical reducing agent Substances 0.000 description 17
- 238000009434 installation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 3
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/12—Arrangements for adjusting or for taking-up backlash not provided for elsewhere
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/12—Arrangements for adjusting or for taking-up backlash not provided for elsewhere
- F16H2057/125—Adjustment of backlash during mounting or assembly of gearing
Abstract
The invention relates to a pipe bending machine and a gear transmission device thereof, and belongs to the technical field of pipe processing. The gear transmission device comprises a frame, an output unit, a transition unit, an input unit and a clearance adjusting mechanism, wherein the output unit, the transition unit, the input unit and the clearance adjusting mechanism are arranged on the frame, the output unit comprises an output gear, and the input unit comprises an input gear; the transition unit comprises a transition gear which is meshed with the output gear and the input gear at the same time; the gap adjusting mechanism comprises a first gap adjusting mechanism for adjusting the gap between the transition gear and the output gear and a second gap adjusting mechanism for adjusting the gap between the input gear and the transition gear; the first clearance adjusting mechanism comprises an eccentric shaft and an adjusting and locking mechanism for adjusting the corner of the eccentric shaft and locking the corner position of the eccentric shaft, and the transition gear is rotatably sleeved on the eccentric shaft. The product of the pipe bending machine constructed by the gear transmission device has high manufacturing precision stability, and can be widely applied to equipment such as pipe bending machines and the like.
Description
Technical Field
The invention relates to pipe processing equipment, in particular to a gear transmission device and a pipe bending machine constructed by the same.
Background
Patent document CN86208918U discloses a rotary pipe bender head, which comprises a pipe bender and a transmission device for transmitting power of the power device to the pipe bender, wherein the pipe bender comprises a pipe bender die, a supporting wheel and a pipe clamping device; the transmission device is a gear-rack transmission device and comprises a gear and a rack, wherein the gear is coaxially arranged with the pipe bending die, the rack is meshed with the gear, and the rack is non-permanently connected with the power device. The transmission device adopting the rack-and-pinion structure can transfer the moment and the movement required by the pipe bending die in a large span, but the structure is huge, so that the whole structure is not compact, and meanwhile, the movement of the rack can interfere the pipe bending process of the special-shaped pipe fitting.
In the transmission devices with different structures, the gear transmission device can well solve the problems, but in order to avoid interference of power devices such as a speed reducer and the like on a pipe fitting in the pipe bending process, the distance between a pipe bending die and the power device is required to be increased as much as possible, and the two-stage gear transmission device is limited in that the requirement of the pipe bending machine on transferring a heavy load in a large span is difficult to be met, namely, the pipe bending machine is required to adopt three or more gear sets for power transfer; in addition, the requirement of adjusting the side clearance between every two adjacent gears is limited by frequent positive and negative rotation of the pipe bending die in the pipe bending process, but the conventional clearance adjusting mechanism is not suitable for the requirements of transferring heavy load and multi-stage clearance adjustment in the pipe bending machine.
Accordingly, existing pipe bending machines typically employ a chain drive as shown in fig. 1 for power transmission, which includes an input unit, a transition unit, and an output unit 05 mounted on a frame 01. The transition unit is a chain 04, the input unit is a sprocket 032 sleeved on an output shaft of the speed reducer 02 and matched with the chain 04, and the output unit 05 comprises an output shaft 051 connected with a pipe bending die in a transmission mode and a sprocket 052 sleeved on the output shaft 051 and matched with the chain 04. The chain transmission can meet the requirement of the pipe bending machine on transferring heavy load in a large span, but the chain is severely worn due to long-term use, so that the precision of the pipe bending is insufficient, the product quality cannot meet the requirement, namely the stability of the manufacturing precision of the product is low.
Disclosure of Invention
The invention aims to provide a gear transmission device which can be used for a pipe bending machine so as to improve the stability of the manufacturing precision of a product of the pipe bending machine;
it is another object of the present invention to provide a pipe bender constructed with the gear assembly described above.
In order to achieve the above purpose, the gear transmission device provided by the invention comprises a frame, an output unit, a transition unit, an input unit and a clearance adjusting mechanism, wherein the output unit, the transition unit, the input unit and the clearance adjusting mechanism are arranged on the frame, the output unit comprises an output gear, and the input unit comprises an input gear; the transition unit comprises a transition gear which is meshed with the output gear and the input gear at the same time; the gap adjusting mechanism comprises a first gap adjusting mechanism for adjusting the gap between the transition gear and one of the output gears and a second gap adjusting mechanism for adjusting the gap between the input gear and the transition gear; the first clearance adjusting mechanism comprises an eccentric shaft and an adjusting and locking mechanism for adjusting the corner of the eccentric shaft and locking the corner position of the eccentric shaft, and the transition gear is rotatably sleeved on the eccentric shaft.
The transition gear is sleeved on the eccentric shaft, so that the side gap between the transition gear and the output gear is adjusted by adjusting the rotation angle of the eccentric shaft, the parallelism of the rotating shaft of the transition gear before and after adjustment is effectively ensured, namely the transmission stability before and after gap adjustment is ensured; the fine adjustment of the center distance of the two gears is amplified to adjust the rotation angle of the eccentric shaft, so that the accuracy of the adjustment of the backlash between the gears is effectively improved; then, the adjustment of the side gap between the input gear and the transition gear is completed through a second gap adjusting mechanism; the problem that the side clearance of the transition gear of the three-stage gear set is not well adjusted in the prior art is solved, so that the requirement of the pipe bending machine on transferring heavy load in a large span is met, and the stability of the manufacturing precision of a product of the pipe bending machine constructed by the gear transmission device is improved.
The specific scheme is that the adjusting and locking mechanism comprises a fixed hole disc fixedly connected with the frame, a gear backlash adjusting hole disc synchronously and rotatably connected with one axial end of the eccentric shaft, and locking screws selectively penetrating through a pair of locking holes arranged on the two hole discs. The eccentric shaft is rotated to drive the gear backlash adjustment hole disc to rotate, different corners of the eccentric shaft are obtained by pairing locking hole pairs at different positions, and the locking of the corner positions of the eccentric shaft is realized through the locking screw, so that the whole mechanism is simple and compact in structure; the interference to the pipe fitting in the pipe bending process can be further reduced.
The more specific scheme is that in the fixed hole plate and the gear backlash adjustment hole plate, locking holes on one plate are uniformly distributed along the circumferential direction of the fixed hole plate, and locking holes on the other plate are divided into a plurality of hole groups along the circumferential direction of the fixed hole plate and the gear backlash adjustment hole plate; in the same hole group, the central angles of the intervals between two adjacent locking holes are equal; and a spacing central angle is reserved between two adjacent hole groups, and the sizes of at least two spacing central angles are unequal. Is convenient to process and adjust.
The other more specific scheme is that the adjusting and locking mechanism comprises an inner hexagonal hole, an inner pentagonal hole, an inner tetragonal hole, an inner triangular hole and other inner polygonal adjusting holes which are arranged on the end face of the other axial end of the eccentric shaft. The rotation angle of the eccentric shaft is adjusted by using equipment such as an internal hexagonal wrench, an adjusting mechanism is not additionally arranged in the axial direction of the eccentric shaft, the compactness of the whole equipment and the vertical dimension are further improved, and the interference to a pipe fitting in the pipe bending process can be further reduced.
The locking mechanism comprises a locking pin and a locking screw, wherein the end part of the locking screw is abutted against the outer end of the locking pin, and the inner end of the locking pin is provided with an extrusion surface matched with the side wall surface of the other axial end of the eccentric shaft. Friction force is formed by extrusion of the extrusion surface of the anti-loose pin and the side surface of the eccentric shaft, so that locking of the eccentric shaft by the hole disc structure is assisted at the other axial end, and locking stability of the eccentric shaft in the bending process is further improved.
The other specific scheme is that the adjusting and locking mechanism is an index plate mechanism, namely the rotation, indexing and positioning of the eccentric shaft are realized by utilizing the existing mature index plate technology.
The second clearance adjusting mechanism comprises a mounting seat for mounting the input gear and an adjusting mechanism which is fixedly arranged on the frame and used for pushing the mounting seat to enable the input gear to move towards the direction close to the transition gear. The structure of the second gap adjusting mechanism is effectively simplified.
The more preferable scheme is that a waist round hole with a long shaft arranged along the approaching direction is arranged on the mounting seat, and the mounting seat is arranged on the frame through a fixing screw penetrating through the waist round hole; the adjusting mechanism comprises an adjusting screw with a screw end propped against the side wall surface of the mounting seat and a fixing seat fixedly arranged on the frame, a screw hole matched with the screw is formed in the fixing seat, and the axial direction of the screw hole is parallel to the approaching direction.
Another preferred scheme is that the input gear, the transition gear and the output gear are all helical gears. The accuracy of the backlash adjustment can be further improved.
In order to achieve the other purpose, the pipe bending machine provided by the invention comprises a frame, a power device, a gear transmission device and a pipe bending device, wherein the power device, the gear transmission device and the pipe bending device are arranged on the frame; the gear transmission is as described in any one of the above claims.
The gear transmission device is used for the pipe bending machine, so that the requirement of the pipe bending machine on transferring heavy load on a large span can be met, and the stability of the product precision of the whole pipe bending machine in the production cycle is effectively ensured.
Drawings
FIG. 1 is a schematic diagram of a chain drive and power unit in a prior art pipe bender;
FIG. 2 is an exploded view of a gear assembly and a power unit according to embodiment 1 of the present invention;
FIG. 3 is an enlarged view of part of A of FIG. 2;
FIG. 4 is an enlarged view of part B of FIG. 2;
FIG. 5 is an exploded view of the gear assembly and the power unit of the embodiment 1 of the present invention when they are different from FIG. 2;
FIG. 6 is a schematic diagram of the operation of the gear assembly and power assembly of embodiment 1 of the present invention;
FIG. 7 is an enlarged view of part C of FIG. 6;
FIG. 8 is an exploded view of the eccentric shaft and the adjusting and locking mechanism in embodiment 1 of the present invention;
FIG. 9 is a schematic diagram showing the distribution of locking holes on a gear backlash adjustment hole disc according to the embodiment 1 of the present invention;
FIG. 10 is a schematic view showing the eccentric shaft rotation angle adjusting process in embodiment 1 of the present invention;
FIG. 11 is a schematic view showing the mounting position of the locking screw and the locking pin in embodiment 2 of the present invention;
FIG. 12 is a schematic diagram showing the fit relationship between the locking screw, the locking pin and the eccentric shaft in embodiment 2 of the present invention;
FIG. 13 is an exploded view of the eccentric shaft and the adjusting and locking mechanism in embodiment 2 of the present invention;
fig. 14 is a schematic view showing the structure of a gear backlash adjustment hole disc in embodiment 4 of the present invention;
fig. 15 is a schematic structural view of a fixed orifice disk in embodiment 4 of the present invention.
Detailed Description
The invention is further described below with reference to examples and figures thereof.
Example 1
Referring to fig. 2 to 7, the pipe bender of the present invention includes a frame 1, and a power device, a gear transmission device and a pipe bending device (not shown) mounted on the frame 1, wherein the frame 1 has a cavity structure with a mounting cavity 100, and the power device includes a speed reducer 2; the gear transmission device is a three-stage gear transmission device and comprises an input unit, a transition unit and an output unit; the input unit comprises a speed reducer mounting plate 31, an input gear 41 and an adjusting component; the transition unit comprises an eccentric shaft 6, a transition gear 57 and an adjusting and locking mechanism; the output unit includes an output shaft 79 and an output gear 75.
The speed reducer 2 is fixed on the speed reducer mounting plate 3 through four fixing bolts 21, the input gear 41 is sleeved on the output shaft 23 of the speed reducer 2 through the flat key 22 to form a limit for the movement of the input gear 41 in the circumferential direction, the pressing plate 42 is fixed on the end face of the output shaft 23 through the fixing screw 43, and the pressing plate is matched with the flat key 22 to form a limit for the movement of the input gear 41 in the axial direction, so that the moment and the movement output by the speed reducer 2 are transmitted to the input gear 41.
Eight waist-shaped round holes 33 and two key grooves 30 are formed in the speed reducer mounting plate 3, the long axes of the waist-shaped round holes 33 are parallel to the groove length direction of the key grooves 30, and the opening ends of the key grooves 30 are arranged on the side end faces of the speed reducer mounting plate 3; the bottom surface of the bottom plate 12 of the frame 1 is provided with two key grooves 11 matched with each other at positions corresponding to the key grooves 30, the speed reducer mounting plate 3 is mounted on the bottom plate 12 by passing through a plurality of fixing screws 31 passing through the waist-round holes 33, and the key grooves 30 and the key grooves 11 are connected by flat keys 32, at this time, an input gear 41 sleeved on the output shaft 23 is inserted into and positioned in the mounting chamber 100 through the through holes 10 arranged on the bottom plate 12.
The adjusting assembly comprises a fixed block 45 fixed on the bottom plate 12 and an adjusting screw 46 arranged along the long axis direction of the oval hole 33, wherein the fixed block 45 is provided with a screw hole matched with the adjusting screw 46, and after the installation is completed, the screw end surface of the adjusting screw 46 abuts against the side end surface of the speed reducer mounting plate 3 so as to push the speed reducer mounting plate 3 to move along the direction defined by the key 32, the key groove 30 and the key groove 11 by screwing the screw 46, namely, move along the long axis direction of the oval hole 33.
The eccentric shaft 6 includes a mounting shaft portion 61, a base shaft portion 62, and a mounting shaft portion 63, the axes of the mounting shaft portions 61, 63 being collinear; the end face of the mounting shaft 61 is provided with an inner hexagonal hole 610 so as to drive the whole eccentric shaft 6 to rotate around the axis of the mounting shaft by an inner hexagonal wrench, namely, an inner hexagonal adjusting hole is formed; the axis of the base shaft 62 is parallel but not collinear with the axis of the mounting shaft, and the transition gear 57 is rotatably journaled on the base shaft 62 by two bearings 56, 58 at the axial ends.
The adjusting and locking mechanism comprises an inner hexagonal hole 610, a fixed hole disc 53 and a gear side gap adjusting hole disc 52, wherein the fixed hole disc 53 is a round boss type ring body structure sleeved on the mounting shaft part 63, the small diameter end face of the round boss type ring body structure is abutted against a shaft shoulder 630 arranged on the mounting shaft part 63, and a stepped through hole 13 matched with the round boss type ring body structure is arranged on the bottom plate 12; during installation, a spacer 59 abutting against a shaft shoulder 611 is sleeved on the installation shaft part 61, the eccentric shaft 6 penetrates through the stepped through hole 13 and then stretches into the installation cavity 100, the installation shaft part 61 stretches into the shaft hole 140 arranged on the top plate 14 and is in rotary fit with the shaft hole, and the spacer 59 abuts against the position between the shaft shoulder 611 and the top plate 14; then, the through-fixing hole plate 53 is fixed in the stepped through-hole 13 by the fixing screw 55, so that the eccentric shaft 6 is rotatably mounted on the frame 1 by the cooperation of the spacer sleeve 59 and the fixing hole plate 53, and the base shaft portion 62 is located in the mounting chamber 100, that is, the transition gear 57 is rotatably mounted in the mounting chamber 100 around the eccentric shaft 6; finally, the gear backlash adjustment hole disk 52 is sleeved on the mounting shaft 63 in a manner of synchronously rotating along with the eccentric shaft 6, in this embodiment, the gear backlash adjustment hole disk 52 is fixedly connected with the fixing hole disk 53 through the locking screw 502 by matching the oblate hole 520 arranged on the gear backlash adjustment hole disk 52 with the oblate shaft 631 arranged on the mounting shaft 63, and the gear backlash adjustment hole disk 52 is tightly pressed on the fixing hole disk 53 through matching the round nut 51 with the external thread arranged on the mounting shaft 63, so that the corner position of the eccentric shaft 6 is locked.
In the output unit, an output gear 75 is synchronously rotatably sleeved on an output shaft 79 through two flat keys 76, two ends of the output shaft 79 are rotatably mounted on a frame 1 through a bearing 73 fixedly arranged in a stepped hole 15 of a bottom plate 11 and a bearing 77 fixedly arranged in a stepped hole 16 of a top plate 14, a gland 78 is fixed on the top plate 14 through a fixing screw 781, the bearing 77 is limited and fixed in the stepped hole 16, and the bearing 73 is limited and fixed in the stepped hole 15 through the cooperation of a fixing nut 72 fixedly arranged on the lower end part of the output shaft 79 and a locking nut 71, so that the output gear 75 is positioned in a mounting cavity 100.
After the completion of the mounting operation, the transition gear 57 is simultaneously engaged with the output gear 75 and the input gear 41.
Referring to fig. 8 to 10, six sets of locking holes 501 are provided on the gear backlash adjustment hole disc 52, a first hole set 521 to a sixth hole set 526 are provided in sequence clockwise, the first hole set 521 has three locking holes 501 with 15 degrees of central angles at intervals, that is, in the same hole set, the central angles at intervals between two adjacent locking holes are equal, and the central angles at intervals between the locking holes and the sixth hole set 526 are 20 degrees; the second hole group 522 has four locking holes 501 with 15 degrees of central angle spacing and 18 degrees of central angle spacing with the first hole group 521; the third hole group 523 has four locking holes 501 with 15 degrees of interval central angle, and 20 degrees of interval central angle with the second hole group 522; the fourth hole group 524 has three locking holes 501 with 15 degrees of spacing central angle, and the spacing central angle with the third hole group 523 is 22 degrees; the fifth hole group 525 has four locking holes 501 with 15 degrees of interval central angle, and 20 degrees of interval central angle with the fourth hole group 524; the sixth hole group 526 has four locking holes 501 with 15 degrees of central angle spacing, and 20 degrees of central angle spacing with the fifth hole group 525; the centers of these locking holes 520 lie on a circle concentric with the gear backlash adjustment hole disc 52.
The fixed hole plate 53 is provided with six locking holes 530 uniformly arranged along the circumferential direction, the locking holes 530 are screw holes matched with the locking screws 502, namely, the circle where the circle centers of the six locking holes 530 are located is concentric with the fixed hole plate 53, and the interval central angle between two adjacent locking holes is 60 degrees.
As shown in fig. 9 and 10, if the central angle 5210 of the interval between the locking holes 530 adjacent to the first hole group 521 is 2.5 degrees, the central angle 5220 of the interval between the second locking holes 530 and the second hole group 522 is 15 degrees, the central angle 5230 of the interval between the third locking holes 530 and the third hole group 523 is 10 degrees, the central angle 5240 of the interval between the fourth locking holes 530 and the fourth hole group 524 is 5 degrees, the central angle 5250 of the interval between the fifth locking holes 530 and the fifth hole group 525 is 12.5 degrees, and the central angle 5260 of the interval between the sixth locking holes 530 and the sixth hole group 526 is 7.5 degrees, from which it can be seen that a pair of locking holes 520 and locking holes 530 are aligned every 2.5 degrees of rotation of the eccentric shaft 6 by the key, so that the relative position between the eccentric shaft 6 and the frame 1 can be locked by the locking screw 502.
In this embodiment, the pipe bending technique index of the pipe bending machine is as follows:
| angle of bent pipe | ° | 0～195° |
| Pipe bending speed | °/sec | 0～360 |
| Repeated positioning accuracy of bent pipe shaft | ° | ±0.08 |
| Service life of the product | h | 5 ten thousand (5) |
| Gear drive torque | kN·m | 3 |
The three gears are helical gears, and the parameters of the gears are shown in the following table:
based on the helix angle, the meshing coefficient between gear sets is larger than 1, and the transmission noise is low.
The center distance of the eccentric shaft is changed between-1.0 and 1.0, and the average adjustment precision of each stage can be calculated to be 2.5 multiplied by 2/360=0.0138 because the adjustment angle of each stage is 2.5 degrees, and the small rotation on the center distance can be converted into a better measured angle value in the range of the adjustment precision required in general, so that the size of the machining error can be reduced and adjusted.
The center distance between the transition gear 57 and the output gear 75 is adjusted by rotating the rotation angle of the eccentric shaft 6, i.e. the backlash between the two is adjusted.
Then, the rotation angle of the adjusting screw 46 is adjusted to push the reducer mounting plate 3 to move towards the direction of the input gear 41 approaching the transition gear 57, so as to achieve the purpose of adjusting the backlash between the two. I.e. the adjustment assembly together with the reducer mounting plate 3 constitutes the second clearance adjustment mechanism in this embodiment, and the adjustment locking mechanism together with the eccentric shaft constitutes the first clearance adjustment mechanism in this embodiment.
In addition, the power device in the pipe bending machine adopts a speed reducer with the model BFH120-L2-30, the original precision is 5 arc minutes, the noise of the speed reducer is 68dBA, the rated rotating speed of a servo motor is 2000RPM, and after simulation is carried out for 500 hours of continuous pipe bending work, the working parameters of the pipe bending machine with the same configuration but adopting a chain transmission device are changed as shown in the following list:
example 2
As an explanation of embodiment 2 of the present invention, only the differences from embodiment 1 described above will be explained below.
Referring to fig. 11 to 13, by providing the pin hole 170 on the side wall plate 17 of the frame 1, in this embodiment, the adjustment locking mechanism further includes the locking pin 61 and the locking screw 62, the outer port portion of the pin hole 170 is provided with a screw thread that mates with the locking screw 62, the inner end surface of the locking pin 81 is formed with an arc-shaped pressing surface 810 that mates with the side wall surface of the mounting shaft portion 61 of the eccentric shaft 6, and the arc-shaped pressing surface 810 of the locking pin 81 is pressed against the side wall surface of the mounting shaft portion 61 by the locking screw 82 to form a friction mating surface to assist locking of the rotational angle position of the eccentric shaft 6.
Example 3
As an explanation of embodiment 3 of the present invention, only the differences from embodiment 1 described above will be explained below.
The first clearance adjusting mechanism can be formed by adopting a dividing disc mechanism to replace the adjusting and locking mechanism, namely, the dividing disc mechanism is utilized to realize the requirements of adjusting, dividing and positioning locking the rotation angle of the eccentric shaft.
Example 4
As an explanation of embodiment 4 of the present invention, only the differences from embodiment 1 described above will be explained below.
Referring to fig. 14 and 15, a plurality of locking holes (only two rings are shown) uniformly arranged in the radial direction may be provided on the fixed orifice plate 53, and each locking hole is uniformly arranged in the circumferential direction of the orifice plate. And a plurality of locking holes (only two circles are shown in the figure) with the same circles and the same radial hole pitch are arranged in the gear clearance adjusting hole disc 52, but interval central angle differences exist between two adjacent circles, so that the purpose of adjusting the rotation angle can be achieved by aligning the locking holes at different radial positions.
The main conception of the invention is that the transition gear is arranged on the eccentric shaft, the corner of the eccentric shaft is adjusted by adjusting the locking mechanism, and the adjusted corner position is locked, so that the center distance between the transition gear and the output gear or the input gear is adjusted, namely the side gap between the two gears is adjusted, so as to meet the requirement of the existing pipe bender on transferring heavy load with larger width.
Claims (8)
1. The gear transmission device is a speed reduction transmission mechanism and comprises a frame, an output unit, a transition unit, an input unit and a clearance adjusting mechanism, wherein the output unit is arranged on the frame and comprises an output gear, and the input unit comprises an input gear;
the method is characterized in that:
the transition unit comprises a transition gear which is meshed with the output gear and the input gear at the same time;
the gap adjusting mechanism comprises a first gap adjusting mechanism for adjusting the gap between the transition gear and the output gear and a second gap adjusting mechanism for adjusting the gap between the input gear and the transition gear;
the first clearance adjusting mechanism comprises an eccentric shaft and an adjusting and locking mechanism for adjusting the corner of the eccentric shaft and locking the corner position of the eccentric shaft, and the transition gear is rotatably sleeved on the eccentric shaft;
the second gap adjusting mechanism comprises a mounting seat for mounting the input gear and an adjusting mechanism which is fixedly arranged on the rack and used for pushing the mounting seat so as to enable the input gear to move towards the direction close to the transition gear;
the mounting seat is provided with a kidney-shaped hole with a long shaft arranged along the direction, and the mounting seat is mounted on the frame through a fixing screw penetrating through the kidney-shaped hole;
the adjusting mechanism comprises an adjusting screw with a screw end propped against the side wall surface of the mounting seat and a fixed seat fixedly arranged on the frame, and a screw hole matched with the adjusting screw is formed in the fixed seat; the adjusting screw is arranged along the long axis direction of the waist round hole and is perpendicular to the axial direction of the eccentric shaft, and the axial direction of the screw hole is parallel to the direction.
2. The gear assembly of claim 1, wherein:
the adjusting and locking mechanism comprises a fixed hole disc fixedly connected with the frame, a gear backlash adjusting hole disc synchronously and rotatably connected with one axial end of the eccentric shaft, and locking screws selectively penetrating through a pair of locking holes arranged on the two hole discs.
3. A gear assembly as claimed in claim 2, wherein:
the fixed hole plate and the gear backlash adjustment hole plate are characterized in that locking holes on one plate are uniformly distributed along the circumferential direction of the fixed hole plate and locking holes on the other plate are divided into a plurality of hole groups along the circumferential direction of the fixed hole plate and the gear backlash adjustment hole plate;
in the same hole group, the central angles of the intervals between two adjacent locking holes are equal;
and a spacing central angle is reserved between two adjacent hole groups, and the sizes of at least two spacing central angles are unequal.
4. A gear assembly as claimed in claim 2, wherein:
the adjusting and locking mechanism comprises an inner polygonal adjusting hole arranged on the end face of the other axial end of the eccentric shaft.
5. A gear assembly as claimed in claim 2, wherein:
the adjusting and locking mechanism further comprises a locking pin and a locking screw, wherein the end part of the locking screw is abutted against the outer end of the locking pin, and an extrusion surface matched with the side wall surface of the other axial end of the eccentric shaft is arranged at the inner end of the locking pin.
6. The gear assembly of claim 1, wherein:
the adjusting and locking mechanism is an index plate mechanism.
7. A gear assembly according to any one of claims 1 to 6, wherein:
the input gear, the transition gear and the output gear are all helical gears.
8. The pipe bending machine comprises a frame, a power device, a gear transmission device and a pipe bending device, wherein the power device, the gear transmission device and the pipe bending device are arranged on the frame, and the pipe bending device is in transmission connection with the power device through the gear transmission device;
the method is characterized in that:
the gear transmission is a gear transmission according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710536321.7A CN107202157B (en) | 2017-07-04 | 2017-07-04 | Pipe bending machine and gear transmission device thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710536321.7A CN107202157B (en) | 2017-07-04 | 2017-07-04 | Pipe bending machine and gear transmission device thereof |
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| Publication Number | Publication Date |
|---|---|
| CN107202157A CN107202157A (en) | 2017-09-26 |
| CN107202157B true CN107202157B (en) | 2024-01-12 |
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| CN201710536321.7A Active CN107202157B (en) | 2017-07-04 | 2017-07-04 | Pipe bending machine and gear transmission device thereof |
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| CN110142319A (en) * | 2019-06-19 | 2019-08-20 | 浙江大学城市学院 | The core-pulling mechanism of minor diameter pipe bending machine |
| CN112128359A (en) * | 2020-09-12 | 2020-12-25 | 埃夫特智能装备股份有限公司 | Gear clearance adjustable mechanism of robot |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2188593Y (en) * | 1994-04-09 | 1995-02-01 | 杭州纺织机械总厂 | Drive space adjustable changeover speed gear |
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| CN204041936U (en) * | 2014-07-11 | 2014-12-24 | 宁波帮手机器人有限公司 | A kind of rack and pinion engagement backlash eliminating equipment |
| CN204533478U (en) * | 2015-02-12 | 2015-08-05 | 湖北中烟工业有限责任公司 | A kind of speed reducer that can adjust gap between gear |
| CN207005261U (en) * | 2017-07-04 | 2018-02-13 | 浙江和良智能装备有限公司 | A kind of bending machine and its gear drive |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102259337B (en) * | 2010-05-28 | 2013-11-06 | 鸿富锦精密工业（深圳）有限公司 | Robot arm component |
| JP5865223B2 (en) * | 2012-09-27 | 2016-02-17 | 本田技研工業株式会社 | Backlash adjustment device for cam drive gear mechanism |
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| CN2188593Y (en) * | 1994-04-09 | 1995-02-01 | 杭州纺织机械总厂 | Drive space adjustable changeover speed gear |
| DE102007031046A1 (en) * | 2007-07-04 | 2009-01-15 | I Chin Gear Co., Ltd., Sinwu | Reduction gearing, has base body, inside which receiving space is formed and another tooth section is formed on outer circumference of tooth ring, which is assigned to tooth section |
| CN201405222Y (en) * | 2009-05-04 | 2010-02-17 | 常州昌隆机床制造有限公司 | Backlash eliminating structure for gear transmission unit |
| CN102322501A (en) * | 2011-08-05 | 2012-01-18 | 太原重工股份有限公司 | The assembly method of the closed Transmitted chains of double shunting reducer |
| CN102430895A (en) * | 2011-10-08 | 2012-05-02 | 中冶南方工程技术有限公司 | Preparation method of clearance-adjusting eccentric shaft for hot-rolled steel section flying shear cutting edge |
| CN204041936U (en) * | 2014-07-11 | 2014-12-24 | 宁波帮手机器人有限公司 | A kind of rack and pinion engagement backlash eliminating equipment |
| CN204533478U (en) * | 2015-02-12 | 2015-08-05 | 湖北中烟工业有限责任公司 | A kind of speed reducer that can adjust gap between gear |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107202157A (en) | 2017-09-26 |
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