CN109482685B - Pipe bending machine with improved main shaft positioning structure - Google Patents
Pipe bending machine with improved main shaft positioning structure Download PDFInfo
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- CN109482685B CN109482685B CN201811512726.8A CN201811512726A CN109482685B CN 109482685 B CN109482685 B CN 109482685B CN 201811512726 A CN201811512726 A CN 201811512726A CN 109482685 B CN109482685 B CN 109482685B
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- 238000005452 bending Methods 0.000 title claims description 46
- 230000005540 biological transmission Effects 0.000 claims description 44
- 230000007704 transition Effects 0.000 claims description 39
- 230000007246 mechanism Effects 0.000 claims description 20
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 17
- 238000000034 method Methods 0.000 description 7
- 238000003825 pressing Methods 0.000 description 6
- 125000006850 spacer group Chemical group 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000004308 accommodation Effects 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000003754 machining Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 206010000372 Accident at work Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 208000002173 dizziness Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Transmission Devices (AREA)
Abstract
The invention relates to a pipe bender comprising an improved main shaft positioning structure, which comprises a frame, a main shaft and a main shaft gear, wherein the main shaft and the main shaft gear are arranged on the frame; the upper flange is detachably positioned on the cavity wall of the upper cavity, an upper bearing is sleeved on the upper shaft neck of the main shaft, and the upper bearing is positioned in an upper flange center hole of the upper flange so as to position the upper shaft neck of the main shaft through the upper bearing and the upper flange; the lower journal extends into the lower cavity, a lower bearing is sleeved on the lower journal and positioned in the lower cavity so that the lower journal is positioned by the lower bearing, which facilitates installation.
Description
Technical Field
The invention relates to a pipe bender, in particular to a pipe bender with an improved main shaft positioning structure. The pipe bending machine is used for shaping the straight pipe into a bent shape, and the bending angle can be 45 degrees, 60 degrees or 90 degrees and the like.
Background
The traditional pipe bending operation is completed manually, and the processing efficiency and the processing precision of the product are very low. With the development of industry, pipe bending machines capable of automatically bending pipes are developed in the industry. The pipe bending machine comprises a pipe bending arm capable of rotating around a main shaft, a pipe bending movable die unit arranged on the pipe bending arm and a driving device for driving the pipe bending arm to rotate. When the bending machine works, the driving device drives the main shaft to rotate around the main shaft with the bending arm, and at the moment, the bending movable die unit clamps one end of a pipe to enable the pipe to rotate relative to the other end of the pipe to bend. In order to freely control the forward rotation and the reverse rotation of the main shaft, the technical scheme commonly used at present is to arrange a gear and a rack meshed with the gear for transmission on the main shaft, wherein the rack is connected with the output end of the driving device. The driving device drives the gear to rotate through the rack. In order to protect the gear from damage, the gear is generally stored in a machine body, and specific structure can be referred to chinese patent No. 200420027261.4, which is filed in 18/05/2004. The pipe bending machine comprises a machine frame 1, wherein a gear accommodating cavity for accommodating a gear 11 and a main shaft 4 radially linked with the gear 11 are arranged on the machine frame 1, and a split structure is arranged between the main shaft 4 and the gear 11. In order to enable the gear 11 and the spindle 4 to transmit mechanical torque and rotate synchronously, a spline fit structure is generally adopted between the gear 11 and the spindle 4, for example, a plurality of axially extending keyways are machined on the spindle 4, and a plurality of raised keys adapted to the keyways are machined on the central hole wall of the gear 11. The gear accommodating cavity is provided with an upper through hole for allowing the upper shaft section of the main shaft 4 to pass through, the gear accommodating cavity is provided with a lower through hole for allowing the lower shaft section of the main shaft 4 to pass through, the apertures of the upper through hole and the lower through hole are smaller than the outer diameter of the gear 11, and the side opening is arranged on the side wall of the gear accommodating cavity. When the gear is installed, the gear 11 is placed into the gear accommodating cavity through the side opening part, then the main shaft 4 is inserted into the gear accommodating cavity from top to bottom through the upper through hole, and the key groove on the main shaft 4 is in insertion fit with the protruding key on the gear 11, so that the main shaft 4 is combined with the gear 11. The aperture of the upper through hole is not large, the visual range of the human eye in the gear accommodating cavity is limited by observing the upper through hole, and the convex key can be inserted into the key groove only by a process of multiple trial and error. And because often be tight fit between keyway and the protruding key, need incessantly beat during the installation the main shaft lets protruding key is inserted in the keyway, in the in-process of beating, main shaft and gear all are in incompletely positioned state, add the gear collection in the gear accommodation chamber is inconvenient for holding the location, different degree of skew bias appears after main shaft and gear bear the knocking force, has increased the installation degree of difficulty, simultaneously main shaft and gear probably bump on the chamber wall in gear accommodation chamber or other components and damage.
Disclosure of Invention
Aiming at the defects existing in the prior art, one of the aims of the invention is to improve the positioning structure of the main shaft and simplify the installation operation of the main shaft and the gears. In view of the above, the invention provides a pipe bending machine with an improved main shaft positioning structure, which comprises a frame, a main shaft arranged on the frame, a main shaft gear arranged on the main shaft, and a rack meshed with the main shaft gear for transmission, wherein a pipe bending movable die unit is also arranged on the main shaft, and the pipe bending movable die unit and the main shaft gear can coaxially rotate under the drive of the rack so as to bend a pipe to be bent when the pipe bending movable die unit rotates; the device is characterized in that a spindle mounting cavity is arranged on the rack, the spindle mounting cavity is vertically penetrated and comprises an upper cavity and a lower cavity, the upper cavity is provided with an upward opening part, the side wall of the upper cavity is provided with a side opening part, the inner diameter size of the upward opening part is larger than the outer diameter of the spindle gear, the inner diameter size of the lower cavity is between the outer diameter of the spindle gear and the outer diameter of a lower shaft neck of the spindle, the spindle gear is positioned in the upper cavity, and the rack extends into the side opening part to be meshed with the spindle gear; the upper flange plate is positioned on the cavity wall of the upper cavity and is tightened on the cavity wall of the upper cavity through screws, an upper bearing is sleeved on an upper shaft neck of the main shaft, and the upper bearing is positioned in an upper flange center hole of the upper flange plate so as to position the upper shaft neck of the main shaft through the upper bearing and the upper flange plate; the lower journal extends into the lower cavity, a lower bearing is mounted on the lower journal and is positioned in the lower cavity such that the lower journal is positioned by the lower bearing.
The frame is a base frame of the pipe bending machine and supports and positions the functional components such as the main shaft, the main shaft gear and the like.
The main shaft installation cavity belongs to an accommodating cavity for accommodating a component, and the upper and lower spaces in the main shaft installation cavity are respectively defined as an upper cavity and a lower cavity according to different directions, wherein the lower cavities of the upper cavity are mutually communicated. The upper cavity and the lower cavity can be cavities on the same component or cavities formed by different components.
Wherein the upper cavity has an upwardly-facing opening portion and is provided with a side opening portion on a cavity side wall thereof, which feature first defines that an upper portion of the upper cavity, which communicates with an external space through the upwardly-facing opening portion, is not a closed structure but an open structure. This feature also defines that the upper chamber and the side opening communicate with each other, and the upper chamber also communicates with the external space through the side opening.
The inner diameter of the upward opening part is larger than the outer diameter of the spindle gear, so that the upward opening part can be a channel for the spindle gear to enter the upper cavity, and the spindle gear can pass through the upward opening part from top to bottom to enter the upper cavity.
Wherein the inner diameter dimension of the lower cavity is between the outer diameter of the spindle gear and the outer diameter of the lower journal of the spindle, i.e. the inner diameter dimension of the lower cavity is larger than the outer diameter of the lower journal and smaller than the outer diameter of the spindle gear. In this way, the lower journal of the spindle may extend into the lower cavity, while the spindle gear may not extend into the lower cavity, and may not be able to exit the spindle mounting cavity through the lower cavity.
Wherein the upper flange plate is positioned on the cavity wall of the upper cavity and is tightened on the cavity wall of the upper cavity by screws. The above features define a detachable connection between the upper flange and the cavity wall of the upper cavity. The upper flange plate can be selectively accommodated in the upper cavity, can be selectively arranged outside the upper cavity, or is partially arranged in the upper cavity, and other parts are arranged outside the upper cavity; and a common spigot positioning structure can be adopted between the upper flange plate and the cavity wall of the upper cavity.
Wherein the upper bearing is positioned in an upper flange center hole of the upper flange plate to thereby position an upper journal of the main shaft through the upper bearing and the upper flange plate. This feature defines that the upper journal of the spindle is positioned in the upper flange center hole of the upper flange by the upper bearing and then on the frame by the upper bearing and the upper flange.
The bearing may be a sliding bearing or a rolling bearing.
According to the technical scheme, compared with the prior art, the invention has the beneficial technical effects that: (1) Since the inner diameter of the upward opening part is larger than the outer diameter of the spindle gear, the spindle gear can be very conveniently and directly installed in the upper cavity from the upward opening part to the lower part along the axial direction by utilizing the upward opening part, and the upward opening part becomes a channel for installing the spindle gear in the upper cavity, so that the assembly is convenient; (2) The main shaft and the main shaft gear can be integrally formed and processed, so that the structural strength of the main shaft and the main shaft gear is greatly improved; (3) During machining, the positioning surface for positioning the upper flange plate and the positioning surface for positioning the lower bearing are machined in the lower cavity at one time through one rotary positioning reference, so that the positioning concentricity precision of the upper bearing and the lower bearing is greatly improved, and the service lives of the spindle gear, the bearing matched with the spindle gear and other parts are greatly prolonged.
A further technical scheme may be that the device further comprises a lower flange plate, wherein the lower flange plate is provided with a lower flange center hole for allowing the lower shaft neck to pass through, the lower flange plate is positioned on the cavity bottom wall of the upper cavity and is tightened on the cavity bottom wall of the upper cavity through screws, and the lower shaft neck extends into the lower cavity after passing through the lower flange center hole; a lower positioning device is also arranged below the lower bearing, and the lower bearing is axially limited between the inner edge of the lower flange center hole of the lower flange plate and the lower positioning device. The lower flange plate is used for pressing the lower bearing to prevent the lower bearing from upwards moving. Thus, the lower flange and the lower bearing may alternatively be pre-positioned on the lower journal, and then the spindle positioned in the upper and lower cavities; and a common spigot positioning structure can be adopted between the lower flange plate and the cavity bottom wall of the lower cavity. The detachable lower flange plate structure is adopted, so that the problem that the lower bearing cannot be mounted in advance when the main shaft is mounted in the traditional structure and the problem that the lower bearing must be sleeved on the lower shaft neck from bottom to top after the main shaft is mounted on the frame are avoided. Because the whole frame is relatively heavy, the direction of the whole frame is very difficult to be changed, if the installation method of installing the lower bearing from bottom to top after the main shaft is installed on the frame is adopted, an installer must lower the head and turn the head to see the operation process of the installer, so that the error is easy, the industrial accident occurs, and dizziness is caused. The lower positioning device not only can limit the lower bearing, but also can limit the uppermost limit position of the main shaft in cooperation with the upper flange plate, the lower bearing and the lower flange plate, so that the main shaft is prevented from bouncing up and down during autorotation.
Further technical solution may be that the lower positioning device is a lower fastening nut screwed on the lower journal or a radially protruding edge extending radially from a cavity wall of the lower cavity to the lower cavity. That is, the inner ring of the lower bearing may be locked by the lower fastening nut, or the outer ring of the lower bearing may be locked by the radially protruding edge. Wherein the radially protruding edge may be either of unitary construction with the lower cavity or of two separate components, in which case the component comprising the radially protruding edge may be screwed onto the lower cavity.
In order to realize the installation between the main shaft and the pipe bending movable die unit, a further technical scheme can be that an upper shaft neck of the main shaft extends out of the upper bearing in the axial direction to form an upper extending section, or/and a lower shaft neck of the main shaft extends out of the lower bearing in the axial direction to form a lower extending section, the pipe bending movable die unit comprises a connecting lug, and the pipe bending movable die unit is connected to the upper extending section or/and the lower extending section of the main shaft through the connecting lug. Therefore, when the main shaft rotates, the bending movable die unit and the main shaft can be driven to coaxially rotate.
In order to further simplify the installation operation, a further technical solution may be that the spindle is integrally provided with a spindle gear, an upper journal of the spindle being located above the spindle gear and the lower journal being located below the spindle gear. The main shaft and the main shaft gear can be integrally machined in a machining mode such as cutting machining, and therefore the installation structure, the installation operation and the transmission structure between the main shaft and the main shaft gear can be simplified.
According to the further technical scheme, the rack is further provided with a propping device, the head of the rack is located between the propping device and the spindle gear, and the propping device is used for propping the rack towards the spindle gear to prevent the rack from being separated from the spindle gear.
According to a further technical scheme, the rack is further provided with a rack driving mechanism, and the output shaft end of the rack driving mechanism is connected with the rack. In this way, the rack driving mechanism can drive the spindle gear to rotate through the rack.
In order to improve the rotation precision of the elbow movable die unit, the further technical scheme may be that the rack driving mechanism includes a servo motor, a servo motor controller in signal connection with the servo motor, a screw rod in transmission connection with the servo motor, and a transition transmission piece in transmission connection with the screw rod, wherein the transition transmission piece is connected with the rack, and the servo motor controller utilizes the servo motor and the screw rod to control the rotation range of the elbow movable die unit.
The transition transmission piece is axially and slidably arranged on the support module, and the support module is positioned on the rack; an axial displacement guide is arranged between the transition transmission piece and the support module, and is used for preventing the transition transmission piece from rotating or drifting radially. Therefore, the support module provides sliding support for the transition transmission piece in the axial sliding process, so that the phenomenon that the transition transmission piece falls down due to suspension is avoided or reduced, and the smoothness and the transmission precision of meshing transmission between the rack and the main shaft gear are affected.
As for the axial movement guide, a further technical solution may be adopted, in which the axial movement guide includes an axial guide groove and a guide block that can extend into the axial guide groove, and the axial guide groove and the guide block are separately disposed on the transition transmission member and the support module. The axial guide groove and the guide block are respectively arranged on the transition transmission piece and the support module, and when the axial guide groove is arranged on the transition transmission piece, the guide block is arranged on the support module. In contrast, when the guide block is disposed on the transition piece, the axial guide slot is disposed on the support module.
Because of the above characteristics and advantages, the invention can be applied to pipe bending machines.
Drawings
FIG. 1 is a schematic perspective view of a pipe bender 100 according to an embodiment of the present invention;
fig. 2 is a schematic perspective view of the head module, with the cover 17 omitted;
fig. 3 is a schematic top view of the head module, with the cover 17 omitted;
FIG. 4 is a schematic cross-sectional view of the structure of FIG. 3 in the direction A-A;
FIG. 5 is a schematic cross-sectional view of the structure in the direction B-B in FIG. 3;
Fig. 6 is a schematic exploded view of the positioning structure of the spindle 4 in a sectional state, and is also a schematic exploded view of the structure shown in fig. 5;
fig. 7 is an exploded view of the positioning structure of the spindle 4;
Fig. 8 is a schematic perspective view of another view direction of the pipe bender 100 according to the present invention, in which the abutting device 9 is shown for clarity, and the pipe bending arm 12 is omitted;
fig. 9 is a schematic exploded view of the abutment device 9.
Detailed Description
The structure of the pipe bending machine applying the technical scheme of the invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 4, a pipe bender 100 with a changed driving structure of a movable bending die comprises a frame 1, a main shaft 4 mounted on the frame 1, a main shaft gear 41 arranged on the main shaft 4, a rack 3 meshed with the main shaft gear 41 and a rack driving mechanism 2 capable of driving the rack 3 to move back and forth, wherein the main shaft 4 is also provided with a movable bending die unit 121, and the movable bending die unit 121 and the main shaft gear 41 can coaxially rotate under the driving of the rack 3 so as to bend a bent pipe when the movable bending die unit 121 rotates. The frame 1 is a base frame of the pipe bender 100, and supports and positions the functional components such as the main shaft 4, the main shaft gear 41, and the like. The machine frame 1 is provided with a machine head module which comprises a machine head shell, a rack driving mechanism 2 and other functional components arranged in the machine head shell. The handpiece housing includes a stationary arm 11, a rack drive mechanism housing 13 having a rack drive mechanism receiving cavity 130, and a spindle mounting housing 15 having a spindle mounting cavity 14, the stationary arm 11, the driver housing 13, and the spindle mounting housing 15 being integrally formed. The main shaft 4 and the bending die unit 121 are positioned beside the rack driving mechanism housing 13. The fixing arm 11 is provided with a clamp 111 for clamping the tail end of the bent pipe. A pipe bending arm 12 rotatable around the main shaft 4 is provided beside the fixed arm 11, and the pipe bending movable die unit 121 is provided on the pipe bending arm 12.
As shown in fig. 4, the rack driving mechanism 2 is accommodated in the rack driving mechanism accommodating chamber 130, the rack driving mechanism 2 includes a servo motor 21, a servo motor controller (not shown in the drawing) in signal connection with the servo motor 21, a screw 22 driven to rotate by the servo motor 21, and a transition transmission member 23 in transmission connection with the screw 22, the transition transmission member 23 is connected with the rack 3, and the servo motor controller controls the rotation range of the elbow movable mold unit 121 by using the servo motor 21 and the screw 22. Wherein, the transition driving piece 23 comprises a driving cylinder 231 with a cylindrical shape and a connecting cover 232 arranged at the end part of the driving cylinder 231. The screw 22 is a ball screw 22, a rod body of the ball screw 22 is in transmission connection with the servo motor 21, an outer ring 221 of the ball screw 22 is connected with a transmission cylinder 231 of the transition transmission piece 23, and the connection cover 232 and the tail end of the rack 3 are connected together through a rotating shaft 31.
A support module 24 is also accommodated in the rack drive accommodation chamber 130, the support module 24 being positioned in the rack drive accommodation chamber 130, i.e. on the machine frame 1. The axial extension of the support module 24 corresponds to the axial extension of the transition piece 23. The support module 24 has a central channel 240, the transition piece 23 being axially slidably disposed in the central channel 240, the transition piece 23 being capable of extending out of the support module 24 when slid. The support module 24 provides sliding support for the transition transmission piece 23 in the axial sliding process, so that the occurrence of falling of the transition transmission piece 23 due to suspension is avoided or reduced, and the smoothness and the transmission precision of meshing transmission between the rack 3 and the main shaft gear 41 are affected. In addition, the support module 24 can prevent or reduce the radial drift of the transition transmission member 23 in the radial direction during the axial sliding process, which affects the smoothness and transmission accuracy of the engagement transmission between the rack 3 and the spindle gear 41. In addition, the axial extension length of the supporting module 24 is equivalent to the axial extension length of the transition transmission piece 23, so that the distance that the supporting module 24 supports the transition transmission piece 23 in the axial movement stroke of the transition transmission piece 23 can be prolonged, and in the axial movement stroke, the stroke that the transition transmission piece 23 is supported by the supporting module 24 is prolonged, which is beneficial to further improving the axial sliding stability of the transition transmission piece 23. A channel 16 is also provided on the wall of the rack drive receiving chamber 130, which communicates with the rack drive receiving chamber 130, the channel 16 being used to clear the transition piece 23 so that the transition piece 23 can be extended or retracted into the rack drive receiving chamber 130 by means of the channel 16.
An axial displacement guide is arranged between the transition piece 23 and the support module 24, which serves to prevent a rotation or a radial drift of the transition piece 23. The axial displacement guide comprises an axial guide slot 230 and a guide block 25 which can extend into the axial guide slot 230, the axial guide slot 230 being arranged on the transition piece 23, the guide block 25 being arranged on the support module 24. Of course, in other embodiments, the axial guide groove 230, the guide block 25 may be interchanged, i.e. the guide block 25 is arranged on the transition piece 23, and the axial guide groove 230 is arranged on the support module 24.
Further, the shaft ends of the servo motor 21 and the screw 22 are respectively provided with a synchronous belt pulley (26, 26 a), and the servo motor 21 is in transmission connection with the screw 22 through a synchronous belt 28. In this way, the kinetic energy of the servo motor 21 is transmitted to the screw 22 via the timing pulleys (26, 26 a), and the transmission accuracy between the servo motor 21 and the screw 22 is improved via the timing pulleys (26, 26 a).
As shown in fig. 2,4 and 7, the rack driving mechanism housing chamber 130 has an upwardly facing open portion 130a, and further includes a cover 17, the cover 17 being coupled to a chamber wall of the rack driving mechanism housing chamber 130 and closing the open portion 130a of the rack driving mechanism housing chamber 130. This allows for easy installation of the lead screw 22, transition piece 23 and support module 24 into the rack drive mechanism receiving cavity 130 via the open portion 130a.
The rack is further provided with a propping device 9, the head 3a of the rack 3 is located between the propping device 9 and the spindle gear 41, the propping device 9 comprises a propping installation seat and a propping block 93 which are arranged on the rack 1, a transversely extending tunnel 910 is arranged on the propping installation seat, the propping block 93 is transversely slidably arranged in the tunnel 910, the rack further comprises an adjusting bolt 94 which is transversely arranged and is in threaded connection with the propping installation seat, the position of the propping block 93 in the transverse direction can be finely adjusted by rotating the adjusting bolt 94, and the adjusting bolt 94 can push the rack 3 to rotate around the rotating shaft 31 to the spindle gear 41 through the propping block 93 so as to prevent the rack 3 from being separated from the spindle gear 41. According to the above-described technical solution, it is found that, firstly, the tail of the rack 3 is connected with the output shaft of the rack driving mechanism 2 through the rotation shaft 31. Thus, when the pressing block 93 presses against the rack 3, the rack 3 can rotate around the rotating shaft 31 by a certain angle, so that the radial torque born by the rack 3 is reduced, and the service life of the rack 3 is effectively prolonged. In addition, when the adjusting bolt 94 is rotated, the adjusting bolt 94 is laterally moved by means of the screw connection relationship with the pressing mount, so that the lateral position of the pressing block 93 can be adjusted. The adjusting bolt 94 and the pressing block 93 can move in the transverse direction, and an adjusting inclined block similar to that in the patent 200420027261.4 is not required to be arranged between the adjusting bolt 94 and the pressing block to change the moving direction, so that the structure is simple, and the installation is very convenient.
Further, the jacking installation seat comprises a first seat body 91 and a second seat body 92 which are arranged in a split mode, the first seat body 91 is arranged between the rack 3 and the second seat body 92, the tunnel 910 is arranged on the first seat body 91, and the adjusting bolt 94 is screwed on the second seat body 92. This makes it possible to flexibly adjust the positional relationship between the first and second housings 91 and 92 so that the central axis of the tunnel 910 is substantially overlapped with and horizontally arranged with the central axis of the adjusting bolt 94 mounted to the second housing 92 according to the structure of the frame 1.
As shown in fig. 5, 6 and 7, the spindle mounting chamber 14 includes an upper chamber 141 and a lower chamber 142 extending therethrough. The upper and lower chambers 141 and 142 communicate with each other. In this embodiment, the upper cavity 141 and the lower cavity 142 are cavities on the spindle mounting housing 15. In other embodiments, the upper cavity 141 and the lower cavity 142 may be formed by different components, for example, the upper cavity 141 is a cavity on the spindle mounting housing 15, and the lower cavity 142 is a cavity on another separate component. The inner diameter of the upward opening portion 1401 is larger than the outer diameter of the spindle gear 41, so that the upward opening portion 1401 is a passage through which the spindle gear 41 enters the upper chamber 141, the spindle gear 41 can pass through the upward opening portion 1401 from top to bottom into the upper chamber 141, and the spindle gear 41 does not collide with the chamber wall of the upper chamber 141 when rotating in the upper chamber 141. While the inner diameter of the lower cavity 142 is sized between the outer diameter of the spindle gear 41 and the outer diameter of the lower journal 402 of the spindle 4, i.e. the inner diameter of the lower cavity 142 is sized larger than the outer diameter of the lower journal 402 and smaller than the outer diameter of the spindle gear 41. In this way, the lower journal 402 of the spindle 4 may extend into the lower cavity 142, while the spindle gear 41 may not extend into the lower cavity 142, but rather may not be able to exit the spindle mounting cavity 14 through the lower cavity 142, rather the cavity bottom wall of the upper cavity 141 may be utilized as a support platform for the spindle gear 41 to facilitate mounting of the spindle gear 41 when mounting the spindle gear 41. The spindle gear 41 is located in the upper cavity 141, the spindle 4 is integrally provided with the spindle gear 41, the upper journal 401 of the spindle 4 is located above the spindle gear 41 and the lower journal 402 is located below the spindle gear 41. The upper chamber 141 has a side opening 143 formed in a chamber side wall thereof. The rack 3 protrudes into the side opening 143 to engage the spindle gear 41.
The upper flange plate 5 is positioned on the cavity wall of the upper cavity 141 through a spigot and is tightened on the cavity wall of the upper cavity 141 through a screw 52, an upper bearing 6 is sleeved on an upper shaft neck 401 of the main shaft 4, and the upper bearing 6 is positioned in an upper flange center hole 50 of the upper flange plate 5 so as to position the upper shaft neck 401 of the main shaft 4 through the upper bearing 6 and the upper flange plate 5.
Also disposed within the upper cavity 141 is a lower flange 7, the lower flange 7 having a lower flange center hole 70 through which the lower journal 402 passes, the lower flange 7 being positioned on the cavity bottom wall of the upper cavity 141 by a spigot and tightened on the cavity bottom wall of the upper cavity 141 by a screw 72. The lower journal 402 of the spindle 4 extends through the lower flange central bore 70 and into the lower cavity 142. A lower bearing (61, 62) is mounted on the lower journal 402 and the lower bearing (61, 62) is positioned in the lower cavity 142 such that the lower journal 402 is positioned by the lower bearing (61, 62). A spacer 63 is provided between the lower bearing 61 and the lower bearing 62. A lower positioning means is also provided below the lower bearings (61, 62), the lower bearings (61, 62) and spacers 63 being axially defined between the lower flange central aperture 70 inner rim of the lower flange 7 and the lower positioning means. In the present embodiment, the lower positioning means is a lower fastening nut 8 screwed on the lower journal 402 and locks the inner ring of the lower bearing (61, 62) by the lower fastening nut 8. Thus, before the spindle 4 is mounted on the machine frame 1, the lower flange 7, the lower bearings (61, 62), the spacer 63 and even the lower fastening nut 8 may be pre-positioned on the lower journal 402, and then the lower journal 402 and the lower bearings (61, 62) and the spacer 63 fitted over the lower journal 402 may be mounted in the lower cavity 142 from the top down direction. The lower fastening nut 8 may not only define the lower bearings (61, 62), but also define the uppermost limit position of the spindle 4 in cooperation with the upper flange 5, the lower bearings (61, 62), and the lower flange 7, so as to prevent the spindle 4 from bouncing up and down when rotating. Of course, in other embodiments, the lower positioning device may also be a radially protruding edge extending radially from the cavity wall of the lower cavity 142 towards the lower cavity 142, and locking the outer ring of the lower bearing (61, 62) by the radially protruding edge; in this configuration, which is provided as the radially protruding edge, the lower flange 7 and the lower bearings (61, 62) may be fitted in advance over the lower journal 402 and then fitted into the lower cavity 142 from the top downward. Alternatively, the lower bearings (61, 62) and spacers 63 may be positioned on the frame 1 by the lower flange 7 and the radially protruding edges in advance, and then the lower journal 402 of the main shaft 4 may be fitted into the lower bearings (61, 62) and spacers 63 from top to bottom.
According to the technical scheme, the following steps are found: since the inner diameter of the upwardly-facing opening portion 1401 is larger than the outer diameter of the spindle gear 41, the spindle gear 41 can be mounted in the upper chamber 141 from the top down in the axial direction very easily by the upwardly-facing opening portion 1401, and the upwardly-facing opening portion 1401 becomes a passage through which the spindle gear 41 is mounted in the upper chamber 141. In addition, the upper journal 401 of the main shaft 4 can be positioned by the upper bearing 6 and the upper flange 5, so that the positioning of the upper journal 401 is not adversely affected by the provision of the large-sized upwardly-opening portion 1401.
As shown in fig. 5, the upper journal 401 of the main shaft 4 extends out of the upper bearing 6 in the axial direction so as to have an upper extension 401a, and the elbow movable mold unit 121 is connected to the upper extension 401a of the main shaft 4 through the connection lugs. Of course, in other embodiments, the lower journal 402 of the main shaft 4 may also extend axially beyond the lower bearings (61, 62) to have a lower extension 402a, and the pipe bending die unit 121 may include a connecting lug, through which the pipe bending die unit 121 is also connected to the lower extension 402 a. In this way, when the main shaft 4 rotates, the bending movable die unit 121 and the main shaft 4 can be driven to coaxially rotate.
Claims (10)
1. The pipe bending machine comprises an improved main shaft positioning structure, and comprises a frame, a main shaft arranged on the frame, a main shaft gear arranged on the main shaft, and a rack meshed with the main shaft gear for transmission, wherein a pipe bending movable die unit is further arranged on the main shaft, and the pipe bending movable die unit and the main shaft gear can coaxially rotate under the drive of the rack so as to bend a pipe to be bent when the pipe bending movable die unit rotates; the device is characterized in that a spindle mounting cavity is arranged on the rack, the spindle mounting cavity is vertically penetrated and comprises an upper cavity and a lower cavity, the upper cavity is provided with an upward opening part, the side wall of the upper cavity is provided with a side opening part, the inner diameter size of the upward opening part is larger than the outer diameter of the spindle gear, the inner diameter size of the lower cavity is between the outer diameter of the spindle gear and the outer diameter of a lower shaft neck of the spindle, the spindle gear is positioned in the upper cavity, and the rack extends into the side opening part to be meshed with the spindle gear;
The upper flange plate is positioned on the cavity wall of the upper cavity and is tightened on the cavity wall of the upper cavity through screws, an upper bearing is sleeved on an upper shaft neck of the main shaft, and the upper bearing is positioned in an upper flange center hole of the upper flange plate so as to position the upper shaft neck of the main shaft through the upper bearing and the upper flange plate;
the lower journal extends into the lower cavity, a lower bearing is mounted on the lower journal and is positioned in the lower cavity such that the lower journal is positioned by the lower bearing.
2. The pipe bender according to claim 1, further comprising a lower flange having a lower flange center hole through which the lower journal passes, the lower flange being positioned on the bottom wall of the upper cavity and tightened on the bottom wall of the upper cavity by screws, the lower journal extending into the lower cavity after passing through the lower flange center hole; a lower positioning device is also arranged below the lower bearing, and the lower bearing is axially limited between the inner edge of the lower flange center hole of the lower flange plate and the lower positioning device.
3. The pipe bender of claim 2, wherein the lower positioning means is a lower fastening nut threaded onto the lower journal or a radially projecting edge extending radially from a wall of the lower cavity toward the lower cavity.
4. The pipe bender according to claim 1, wherein the upper journal of the main shaft extends axially out of the upper bearing to have an upper extension, or/and the lower journal of the main shaft extends axially out of the lower bearing to have a lower extension, the pipe bender unit comprises a connecting lug, and the pipe bender unit is connected to the upper extension or/and the lower extension of the main shaft through the connecting lug.
5. The pipe bender according to claim 1, wherein the spindle is integrally provided with a spindle gear, an upper journal of the spindle being located above the spindle gear and the lower journal being located below the spindle gear.
6. The bending machine according to any one of claims 1 to 5, wherein the frame is further provided with a pushing device, the head of the rack is located between the pushing device and the spindle gear, and the pushing device is used for pushing the rack towards the spindle gear to prevent the rack from being separated from the spindle gear.
7. The pipe bender according to any of claims 1-5, wherein the frame further comprises a rack drive mechanism, wherein the output shaft of the rack drive mechanism is connected to the rack.
8. The pipe bending machine according to claim 7, wherein the rack driving mechanism comprises a servo motor, a servo motor controller in signal connection with the servo motor, a screw rod in transmission connection with the servo motor and a transition transmission piece in transmission connection with the screw rod, the transition transmission piece is connected with the rack, and the servo motor controller controls the rotation range of the pipe bending movable die unit by using the servo motor and the screw rod.
9. The pipe bender according to claim 8, further comprising a support module on which the transition drive is axially slidably disposed, the support module being positioned on the frame; an axial displacement guide is arranged between the transition transmission piece and the support module, and is used for preventing the transition transmission piece from rotating or drifting radially.
10. The pipe bender according to claim 9, wherein the axially movable guide comprises an axial guide slot and a guide block extendable into the axial guide slot, guide block being spaced apart on the transition drive member, the support module.
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| CN201811512726.8A CN109482685B (en) | 2018-12-11 | 2018-12-11 | Pipe bending machine with improved main shaft positioning structure |
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|---|---|---|---|
| CN201811512726.8A CN109482685B (en) | 2018-12-11 | 2018-12-11 | Pipe bending machine with improved main shaft positioning structure |
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| CN109482685B true CN109482685B (en) | 2024-04-26 |
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6170310B1 (en) * | 1999-09-28 | 2001-01-09 | Sheng-Tsung Wang | Transmission shaft of a movable arm of a pipe bender |
| CN2485065Y (en) * | 2000-05-30 | 2002-04-10 | 颖霖机械工业股份有限公司 | Pipe-bending machine with control of precisive bending angle |
| CN2902504Y (en) * | 2006-05-08 | 2007-05-23 | 庄添财 | Bend pipe mainshaft driving and resetting device |
| CN200967070Y (en) * | 2006-11-02 | 2007-10-31 | 林明巧 | Pipe bending synchronization mechanism of the pipe bender |
| CN201755605U (en) * | 2010-07-19 | 2011-03-09 | 江苏合丰机械制造有限公司 | Pipe bending device capable of realizing leftward and rightward bending in pipe bender |
| RU2010145109A (en) * | 2008-04-04 | 2012-05-20 | Смл Интернэшнл С.П.А. (It) | CLAMPING DEVICE WITH MOBILE CLIPPING DEVICE HAVING SEPARATE STAGES OF CONNECTION AND CLAMPING IN THE MATRIX OF THE TUBING MACHINE |
| CN102886398A (en) * | 2012-10-15 | 2013-01-23 | 和和机械（张家港）有限公司 | Split-type vertical transmission device in fully-automatic numerically-controlled hydraulic tube bender |
| CN105499343A (en) * | 2016-01-14 | 2016-04-20 | 张家港市台和机械制造有限公司 | Pipe bending device in pipe bending machine |
| CN205463759U (en) * | 2016-01-14 | 2016-08-17 | 张家港市台和机械制造有限公司 | Return bend angel position control device in bending machine |
| WO2016197623A1 (en) * | 2015-06-11 | 2016-12-15 | 张家港江苏科技大学产业技术研究院 | Bending mold device for bidirectional tube-bending |
| WO2016203847A1 (en) * | 2015-06-18 | 2016-12-22 | 三桜工業株式会社 | Pipe bending device |
| CN205869146U (en) * | 2016-08-05 | 2017-01-11 | 牟国庆 | Tube bending machine |
| CN107989978A (en) * | 2017-09-06 | 2018-05-04 | 合肥常青机械股份有限公司 | A kind of cylinder drives rack-and-pinion rotating mechanism |
| CN108356108A (en) * | 2018-04-20 | 2018-08-03 | 浙江和良智能装备有限公司 | A kind of bending machine |
| CN209424354U (en) * | 2018-12-11 | 2019-09-24 | 广东捷泰克智能装备有限公司 | It include the bending machine for improving spindle positioning structure |
-
2018
- 2018-12-11 CN CN201811512726.8A patent/CN109482685B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6170310B1 (en) * | 1999-09-28 | 2001-01-09 | Sheng-Tsung Wang | Transmission shaft of a movable arm of a pipe bender |
| CN2485065Y (en) * | 2000-05-30 | 2002-04-10 | 颖霖机械工业股份有限公司 | Pipe-bending machine with control of precisive bending angle |
| CN2902504Y (en) * | 2006-05-08 | 2007-05-23 | 庄添财 | Bend pipe mainshaft driving and resetting device |
| CN200967070Y (en) * | 2006-11-02 | 2007-10-31 | 林明巧 | Pipe bending synchronization mechanism of the pipe bender |
| RU2010145109A (en) * | 2008-04-04 | 2012-05-20 | Смл Интернэшнл С.П.А. (It) | CLAMPING DEVICE WITH MOBILE CLIPPING DEVICE HAVING SEPARATE STAGES OF CONNECTION AND CLAMPING IN THE MATRIX OF THE TUBING MACHINE |
| CN201755605U (en) * | 2010-07-19 | 2011-03-09 | 江苏合丰机械制造有限公司 | Pipe bending device capable of realizing leftward and rightward bending in pipe bender |
| CN102886398A (en) * | 2012-10-15 | 2013-01-23 | 和和机械（张家港）有限公司 | Split-type vertical transmission device in fully-automatic numerically-controlled hydraulic tube bender |
| WO2016197623A1 (en) * | 2015-06-11 | 2016-12-15 | 张家港江苏科技大学产业技术研究院 | Bending mold device for bidirectional tube-bending |
| WO2016203847A1 (en) * | 2015-06-18 | 2016-12-22 | 三桜工業株式会社 | Pipe bending device |
| CN105499343A (en) * | 2016-01-14 | 2016-04-20 | 张家港市台和机械制造有限公司 | Pipe bending device in pipe bending machine |
| CN205463759U (en) * | 2016-01-14 | 2016-08-17 | 张家港市台和机械制造有限公司 | Return bend angel position control device in bending machine |
| CN205869146U (en) * | 2016-08-05 | 2017-01-11 | 牟国庆 | Tube bending machine |
| CN107989978A (en) * | 2017-09-06 | 2018-05-04 | 合肥常青机械股份有限公司 | A kind of cylinder drives rack-and-pinion rotating mechanism |
| CN108356108A (en) * | 2018-04-20 | 2018-08-03 | 浙江和良智能装备有限公司 | A kind of bending machine |
| CN209424354U (en) * | 2018-12-11 | 2019-09-24 | 广东捷泰克智能装备有限公司 | It include the bending machine for improving spindle positioning structure |
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| CN109482685A (en) | 2019-03-19 |
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