CN113182912A - Cutter beating device utilizing ball screw to carry out transmission - Google Patents
Cutter beating device utilizing ball screw to carry out transmission Download PDFInfo
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- CN113182912A CN113182912A CN202110487866.XA CN202110487866A CN113182912A CN 113182912 A CN113182912 A CN 113182912A CN 202110487866 A CN202110487866 A CN 202110487866A CN 113182912 A CN113182912 A CN 113182912A
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- screw rod
- piston
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 17
- 238000010009 beating Methods 0.000 title description 2
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 17
- 230000003584 silencer Effects 0.000 claims description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 4
- 230000033001 locomotion Effects 0.000 abstract description 11
- 238000005242 forging Methods 0.000 description 17
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000009193 crawling Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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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
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/155—Arrangements for automatic insertion or removal of tools, e.g. combined with manual handling
- B23Q3/1552—Arrangements for automatic insertion or removal of tools, e.g. combined with manual handling parts of devices for automatically inserting or removing tools
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a knife beater utilizing a ball screw to carry out transmission, which comprises a cylinder body and a piston rod, wherein the cylinder body is provided with a front cover and a rear cover, the cylinder body is internally provided with a screw rod, the screw rod is sleeved with a screw rod nut and is connected with a driving mechanism for driving the screw rod to rotate, a containing cavity for containing the other end of the screw rod is arranged in the piston rod, the piston rod is connected with the screw rod nut through a piston, a guide rod penetrates through the piston, the front cover is connected with a pressurizing cylinder, the pressurizing cylinder is provided with a pressurizing cylinder end cover, the side wall of the pressurizing cylinder end cover is provided with a joint opening, the piston rod can penetrate through the front cover to enter the pressurizing cylinder, and an oil cavity is formed from the front end of the piston rod to the joint opening. The invention utilizes the screw motion of the screw rod and the screw rod nut to generate thrust to realize the movement of the piston rod, the screw rod and the screw rod nut have good transmission stability, high precision and no creeping phenomenon, so that the whole knife beater operates stably, the operating stability of an actuating element is ensured, and the knife beater has no noise pollution, is suitable for occasions with higher precision requirements and is particularly suitable for the field of processing centers.
Description
Technical Field
The invention relates to the technical field of machining center equipment, in particular to a knife forging device utilizing a ball screw for transmission.
Background
The tool changer is a gas-liquid conversion device with wide application, provides high-pressure oil for an actuating element through the tool changer, and is mainly used for tool changing action of a machining center.
The knife forging devices on the market are various, and the traditional knife forging devices utilize a pneumatic control system as a pressure source. It is known that air has compressibility, and it is due to this characteristic that the "creep" phenomenon occurs when the shaft center is actuated, which affects the motion stability of the actuating element. In addition, the traditional knife beater is reversed through the electromagnetic valve, and the electromagnetic valve can emit large exhaust sound to cause noise pollution.
Therefore, in order to avoid the above problems, a new structure of the knife beater is urgently needed to overcome the defects in the prior art.
Disclosure of Invention
In order to solve the problems, the invention provides a cutter beater which utilizes a ball screw to carry out transmission, and the cutter beater has high transmission precision, good transmission stability and no noise pollution.
According to one aspect of the invention, the tool sharpener utilizing the ball screw to transmit comprises a cylinder body and a piston rod, wherein a front cover and a rear cover are respectively arranged at two ends of the cylinder body to form a cavity, a screw rod is arranged in the cylinder body, the screw rod is sleeved with a screw rod nut capable of moving back and forth relative to the screw rod, one end of the screw rod is connected with a driving mechanism for driving the screw rod to rotate, a containing cavity for containing the other end of the screw rod is arranged in the piston rod, the piston rod is connected with the screw rod nut, the front cover is connected with a hollow pressurizing cylinder, a pressurizing cylinder end cover is sleeved at the end part of the pressurizing cylinder, a joint port is formed in the side wall of the pressurizing cylinder end cover, the outer wall of the piston rod is tightly matched with the front cover, the piston rod can penetrate through the front cover to enter the pressurizing cylinder, and an oil cavity is formed from the front end of the piston rod to the joint port. Therefore, the driving mechanism acts on the screw rod, the screw rod rotates, the screw rod nut arranged on the screw rod generates thrust through spiral motion, the screw rod nut drives the piston rod to move forwards, when the piston rod enters the pressurizing cylinder, a closed space is formed, the oil pressure in the oil chamber is increased, the piston rod continues to move forwards, oil is injected into the actuating element from the joint of the end cover of the pressurizing cylinder, so that the actuating element obtains high-pressure oil, thereby obtaining large output, the transmission stability of the screw rod and the screw rod nut is good, the precision is high, the knife forging device is stable in operation and free from creeping phenomenon, the knife beater with the structure replaces the traditional knife beater of an air control system, avoids the problem of noise pollution caused by the large exhaust generated by reversing the electromagnetic valve, the cutter beater is suitable for occasions with high precision requirements, and is particularly suitable for the field of machining center equipment.
In some embodiments, one end of the piston rod close to the rear cover is connected with a piston, the other end of the piston is connected with a screw nut, a guide rod penetrates through the piston, and two ends of the guide rod are respectively connected with the front cover and the rear cover. Therefore, when the screw rod rotates, the screw rod nut generates a thrust force due to spiral motion to push the piston to move forwards, so that the piston drives the piston rod to move forwards, the piston rod can be ensured not to rotate by additionally arranging the guide rod, the piston rod can only move forwards and backwards relative to the screw rod, the guide rods which are symmetrically arranged can also play a role in enabling the piston rod to stably move, and the operation stability of the unclamping device is improved.
In some embodiments, the outer wall of the piston is provided with a plurality of guide ring grooves, each guide ring groove is internally provided with a guide ring, each guide ring abuts against the inner wall of the cylinder body, a self-lubricating bearing is embedded in the piston, and the self-lubricating bearing is sleeved outside the guide rod. Therefore, the guide ring increases the supporting performance of the piston, improves the wear resistance of the piston, and the self-lubricating bearing plays a supporting role in the guide rod, thereby prolonging the service life of each part.
In some embodiments, the driving mechanism adopts a servo motor, an output shaft of the servo motor is connected with a lead screw through a coupler, a sleeve is arranged on the coupler outer cover and provided with a stepped hole, a throat plug is connected with the stepped hole through threads, a front sleeve plate and a rear sleeve plate are respectively arranged at two ends of the sleeve, the front sleeve plate is connected with the rear cover, and the servo motor is installed on the rear sleeve plate. Therefore, the front sleeve plate, the sleeve and the rear sleeve plate are locked into a whole through the long screws, the whole and the rear cover are locked together through the screws, and during assembly, the locking bolts on the shaft coupler are screwed tightly by penetrating through the stepped holes of the sleeve by utilizing the inner hexagonal wrench, so that the output shaft of the servo motor is clamped, the installation is very convenient, the throat plug is installed, external dust and impurities can be prevented from entering the sleeve, and the service life of the shaft coupler is prolonged.
In some embodiments, a first shaft, a second shaft and a third shaft extend from one end of the screw rod away from the piston rod in sequence, the first shaft and the screw rod form a first shaft shoulder, the second shaft and the first shaft form a second shaft shoulder, a first deep groove ball bearing and a second deep groove ball bearing are arranged in the rear cover, a bushing is sleeved on the first shaft, two ends of the bushing abut against the first shaft shoulder and an inner ring of the first deep groove ball bearing respectively, the second shaft is provided with external threads and is sleeved with a precision nut, the second deep groove ball bearing protrudes out of the second shaft shoulder, the precision nut abuts against the inner ring of the second deep groove ball bearing, a copper gasket and a stop screw are arranged on the side wall of the precision nut to abut against the second shaft, and the third shaft and an output shaft of the servo motor are connected with the coupler through a double-headed circular countersunk key. Therefore, the servo motor is started, the third shaft is driven to rotate through the coupler, the whole screw rod is driven to rotate, the copper gasket and the stop screw in the precision nut can reinforce the connection between the precision nut and the second shaft, the bushing, the first deep groove ball bearing, the second deep groove ball bearing and the precision nut are reasonably arranged, the second shaft can be ensured to be stable in operation, and the stability of the rotation of the screw rod is improved.
In some embodiments, a step shaft is arranged on one side of the pressurizing cylinder close to the front cover, a tool withdrawal groove is arranged at the root of the step shaft, a stop block is embedded in the tool withdrawal groove, the stop block is of a two-piece semicircular ring structure in a symmetrical shape, the step shaft is embedded in the front cover, a fixing plate is sleeved outside the pressurizing cylinder and fixedly connected to the front cover, the stop block is matched with the inner wall of the fixing plate, and the stop block is close to the front cover. Therefore, the tool withdrawal groove ensures that the outer wall of the step shaft is tightly assembled with the front cover, and the design of the tool withdrawal groove ensures that the stop block and the fixing plate cannot move along the axial direction, so that the assembly of the pressurizing cylinder and the front cover is more stable.
In some embodiments, the inner cavity of the front cover is provided with a plurality of inner grooves, each inner groove is internally provided with a first sealing element, the first sealing element can increase the sealing performance between the front cover and the piston rod and between the front cover and the pressurizing cylinder, and the joint of the pressurizing cylinder and the end cover of the pressurizing cylinder is provided with a second sealing element. Thereby, the sealing effect of the oil chamber is improved by the first and second seals.
In some embodiments, the piston rod is provided with a vent hole, the vent hole is communicated with the accommodating cavity, the front cover is provided with a first silencer, a first exhaust hole is formed in the position, where the first silencer is installed, of the front cover, the first exhaust hole extends to the cavity from the front cover, the first silencer and the first exhaust hole, the cavity, the vent hole and the accommodating cavity form an air exhaust channel, the rear cover is provided with a second silencer, a second exhaust hole is formed in the position, where the second silencer is installed, of the rear cover, the second exhaust hole extends to the cavity from the rear cover, and the second silencer and the second exhaust hole and the cavity form the air exhaust channel. Therefore, air in the cutter beater can be exhausted through the first silencer and the second silencer, and noise pollution can be avoided.
In some embodiments, the front cover is provided with an oil hole extending to an inner wall of the front cover, an oil box is connected to the oil hole of the front cover, and a third sealing member is arranged between the oil box and the front cover. Therefore, the oil box is used for storing oil, oil in the oil box can ensure that the oil chamber is full of oil, and the execution element can obtain high-pressure oil when the cutter beater operates, so that large output force is obtained, and the motion stability of the execution element is ensured.
Compared with the prior art, the invention has the beneficial effects that: the knife forging device provided by the invention has the advantages that each part of the knife forging device is reasonably assembled, the knife forging device is different from the knife forging device taking a traditional pneumatic control system as a power source, the knife forging device provided by the invention utilizes the spiral motion of a screw rod and a screw rod nut to generate thrust to push a piston to drive a piston rod to move, the piston is guided and limited through a guide rod to ensure that the piston rod does not rotate and only horizontally moves, when the piston rod enters a pressurizing cylinder, a closed space is formed, the oil pressure rises and moves forwards along with the piston rod, and oil is injected into an executing element from a joint of an end cover of the pressurizing cylinder to enable the executing element to obtain high-pressure oil, so that large output is obtained, the transmission stability of the screw rod and the screw rod nut is good, the precision is high, the creeping phenomenon does not exist, and the whole knife forging device stably runs; the knife beater with the structure replaces a traditional knife beater of an air control system, avoids the phenomenon of large exhaust caused by reversing of the electromagnetic valve, and timely exhausts air in the knife beater through the first silencer and the second silencer, so that the problem of noise pollution is avoided; the novel knife forging device is suitable for occasions with high precision requirements, and is particularly suitable for the field of machining center equipment.
Drawings
FIG. 1 is a schematic structural view of an embodiment of a sharpener of the present invention using a ball screw for transmission;
FIG. 2 is a front view of a sharpener of the present invention utilizing a ball screw for transmission;
FIG. 3 is a schematic structural view of the front cover, wherein 3-1 is a left side view of the front cover, 3-2 is a schematic structural view of the inside of the front cover, and 3-3 is a right side view of the front cover;
FIG. 4 is a schematic structural view of the rear cover, wherein 4-1 is a left side view of the rear cover, 4-2 is a schematic structural view of the inside of the rear cover, and 4-3 is a right side view of the rear cover;
FIG. 5 is a schematic structural view of a piston, wherein 5-1 is a schematic internal structural view of the piston, and 5-2 is a right side view of the piston;
FIG. 6 is a schematic structural view of a lead screw;
fig. 7 is a schematic view of the construction of the piston rod;
FIG. 8 is a schematic structural view of a precision nut;
FIG. 9 is a schematic view of the construction of the bushing;
FIG. 10 is a schematic structural view of a pressurizing cartridge;
FIG. 11 is a schematic structural view of an end cover of the pressure increasing cartridge, wherein 11-1 is a left side view of the end cover of the pressure increasing cartridge and 11-2 is a schematic structural view of the interior of the end cover of the pressure increasing cartridge;
FIG. 12 is a schematic structural view of the fixing plate, wherein 12-1 is a left side view of the fixing plate, and 12-2 is a schematic internal structural view of the fixing plate;
FIG. 13 is a schematic view of the stopper structure;
FIG. 14 is a schematic structural view of a flange plate, wherein 14-1 is a left side view of the flange plate and 14-2 is a side view of the flange plate;
FIG. 15 is a schematic structural view of a front deck, in which 15-1 is a schematic internal structural view of the front deck, and 15-2 is a right side view of the front deck;
FIG. 16 is a schematic structural view of the sleeve, wherein 16-1 is a left side view of the sleeve and 16-2 is a schematic internal structural view of the sleeve;
fig. 17 is a structural view of a rear deck, in which 17-1 is an internal structural view of the rear deck, and 17-2 is a right side view of the rear deck.
Detailed Description
The present invention will be further described with reference to the following embodiments.
As shown in fig. 1 and 2, a tool holder utilizing a ball screw to transmit power according to an embodiment of the present invention includes a cylinder 11 and a piston rod 7, a front cover 12 and a rear cover 13 are respectively fixedly installed at two ends of the cylinder 11 to form a cavity 10, a screw 4 is installed in the cylinder 11, the screw 4 is processed with a spiral line with continuous and same pitch, a screw nut 5 is provided with an internal thread and is sleeved on the screw 4, one end of the screw 4 is connected with a driving mechanism 3 for driving the screw 4 to rotate, the screw nut 5 moves back and forth relative to the screw 4 when the screw 4 rotates, an accommodating cavity 71 for accommodating the other end of the screw 4 is opened in the right end of the piston rod 7, the accommodating cavity 71 is a cylindrical inner hole with a certain depth, the piston rod 7 is connected with the screw nut 5, the front cover 12 is connected with a hollow pressurizing barrel 9, an end cover 90 is sleeved on the end of the pressurizing barrel 9, the side wall of the end cover 90 of the pressure increasing cylinder is provided with a joint port 901, the outer wall of the piston rod 7 is tightly matched with the front cover 12, the piston rod 7 can penetrate through the front cover 12 to enter the pressure increasing cylinder 9, and the oil chamber 100 is formed from the front end of the piston rod 7 to the joint port 901.
The driving mechanism 3 acts on the screw rod 4, the screw rod 4 rotates, the screw rod nut 5 installed on the screw rod 4 generates a thrust force through spiral motion, the screw rod nut 5 drives the piston rod 7 to move forwards, a closed space is formed when the piston rod 7 enters the pressurizing cylinder 9, the oil pressure in the oil chamber 100 rises, the piston rod 7 continues to move forwards, oil is injected into the executing element from the joint port 901 of the end cover 90 of the pressurizing cylinder, and the executing element obtains high-pressure oil, so that a large output force is obtained. The transmission stability of lead screw 4 and screw-nut 5 is good, the precision is high for this beater operates steadily, does not have the phenomenon of crawling, and traditional pneumatic control system beater is replaced to the beater of this structure, has avoided sending great exhaust, the noise pollution problem that leads to because of the solenoid valve commutates.
The specific mounting structure of the cylinder 11 and the front cover 12 and the rear cover 13 is shown in fig. 3 and 4: the cylinder 11 may be a hollow aluminum alloy pipe. The front cover 12 is in a square shape, and the part of the front cover 12 matched with the cylinder body 11 is in a cylindrical structure. The middle of the rear cover 13 is square, the two ends are cylindrical structures, and the cylindrical structure at the left end of the rear cover 13 is matched with the cylinder body 11. The right end face of the square structure of the front cover 12 is provided with 4 threaded holes B with a certain depth, the right end face of the square structure of the rear cover 13 is provided with 4 stepped counter bores B ', bottom holes of the counter bores B ' are completely communicated, and the counter bores B ' penetrating through the rear cover 13 are connected with the threaded holes B of the front cover 12 through hexagon socket head steel screws K1, so that the front cover 12, the cylinder body 11 and the rear cover 13 are locked together.
As shown in fig. 1 and 10, the specific mounting structure of the pressure increasing cylinder 9 and the pressure increasing cylinder end cover 90: a step shaft 91 is processed on the right side of the pressurizing cylinder 9, namely, one end of the pressurizing cylinder 9 close to the front cover 12, and a tool withdrawal groove 92 with certain width and depth is formed at the root of the step shaft 91. A stopper 93 is embedded in the tool withdrawal groove 92, and the stopper 93 is a two-piece semicircular ring structure (shown in fig. 13) in a symmetrical shape. The step shaft 91 is embedded in the front cover 12, and the pressure increasing cylinder 9 is externally provided with a fixing plate 94. As shown in fig. 12, the fixing plate 94 has a circular ring structure, the inner hole of the fixing plate 94 is stepped, the left end of the fixing plate 94 is processed with 6 stepped inner holes a' in an annular array, the left end of the front cover 12 is correspondingly processed with 6 threaded holes a in an annular array and having a certain depth, and the fixing plate 94 is fixedly connected to the front cover 12 through a hexagon socket screw K2. Stop 93 engages the inner wall of mounting plate 94 and stop 93 abuts bezel 12. The relief groove 92 ensures that the outer wall of the step shaft 91 is tightly fitted with the front cover 12, and the relief groove 92 is designed such that the stopper 93 and the fixing plate 94 cannot move in the axial direction, thereby making the fitting of the pressure increasing cylinder 9 with the front cover 12 more stable. The left side of the pressure increasing cylinder 9 is provided with external threads, the end cover 90 of the pressure increasing cylinder is provided with internal threads matched with the external threads, the end cover 90 of the pressure increasing cylinder is connected with the pressure increasing cylinder 9 through threads, and the joint is sealed through a second sealing element 102. In order to strengthen the connection between the pressure cylinder 9 and the pressure cylinder end cover 90, a copper gasket and a set screw (not shown) can be additionally arranged.
As shown in fig. 1, a plurality of inner grooves are formed in the inner cavity of the front cover 12, and first sealing members 101 are provided in the inner grooves, and the first sealing members 101 increase the sealing performance between the front cover 12 and the piston rod 7 and between the front cover 12 and the pressurizing cylinder 9. The sealing effect of the oil chamber 100 is improved by the first seal 101 and the second seal 102.
As shown in fig. 11, the joint port 901 of the side wall of the pressure increasing cylinder end cover 90 can be machined into a cylindrical structure and has a threaded hole with a taper to facilitate the installation of an oil pressure joint and an oil pressure hose (not shown) so that high-pressure oil in the oil chamber 100 can enter the actuator. 2 threaded holes M with certain depth are processed on the left side of the pressure charging barrel end cover 90, and a flange plate 107 (shown in figure 14) is arranged on one side of the pressure charging barrel end cover 90 through a hexagon socket steel screw K3.
As shown in fig. 2, an oil box 105 is mounted on a side wall of the front cover 12 by a hexagon socket screw (not shown), specifically, an oil hole 122 (shown in fig. 3) is opened in the front cover 12, the oil hole 122 extends to an inner wall of the front cover 12, the oil box 105 is connected to the oil hole 122 of the front cover 12, and a third sealing member 106 is disposed between the oil box 105 and the front cover 12. The oil box 105 is used for storing oil, oil in the oil box 105 can ensure that the oil chamber 100 is filled with oil, and the execution element can obtain high-pressure oil when the cutter beater operates, so that high output is obtained, and the motion stability of the execution element is ensured.
As shown in fig. 1, one end of the piston rod 7 close to the rear cover 13 is connected with a piston 8, the other end of the piston 8 is connected with the feed screw nut 5, a guide rod 80 penetrates through the piston 8, and two ends of the guide rod 80 are respectively connected with the front cover 12 and the rear cover 13. In particular, the piston 8 may be of a cylindrical configuration, with the piston 8 moving axially within the cylinder 11. The outer wall of piston 8 is equipped with 4 guide ring grooves 81 that have certain degree of depth, installs guide ring 82 in every guide ring groove 81, and guide ring 82 is contradicted with cylinder body 11 inner wall. As shown in fig. 5, a threaded hole is formed in the left side of the interior of the piston 8, the piston rod 7 is of a cylindrical structure, an external thread is formed in the right side of the piston rod 7 (shown in fig. 7), and the piston 8 and the piston rod 7 are connected through a thread and are reinforced through a copper gasket and a set screw (not shown). A cylindrical inner hole is formed in the right side of the interior of the piston 8, 6 threaded holes C which are arranged in an annular array and have a certain depth are formed in the right end face of the piston 8, and the piston 8 and the feed screw nut 5 are locked together through a hexagon socket steel screw K4. The piston 8 is provided with a guide rod through hole 801 with two large inner diameters at two ends and a small inner diameter at the middle relative to the center thereof, the self-lubricating bearings 83 are respectively knocked into the two ends of the piston 8, and the self-lubricating bearings 83 are sleeved outside the guide rod 80. Two cylindrical holes D (shown in fig. 3) with a certain depth are opened at the right end of the front cover 12, correspondingly, two cylindrical holes D '(shown in fig. 4) with a certain depth are opened at the left end of the rear cover 13, and two ends of the guide rod 80 are respectively installed in the cylindrical holes D and D'. Therefore, when the screw rod 4 rotates, the screw rod nut 5 generates a thrust force due to spiral motion to push the piston 8 to move forwards, so that the piston 8 drives the piston rod 7 to move forwards, the piston rod 7 can not rotate by additionally arranging the guide rod 80, the piston rod 7 can only move forwards and backwards relative to the screw rod 4, the guide rods 80 which are symmetrically arranged can also play a role in enabling the piston rod 7 to stably move, and the operation stability of the knife forging device is improved. The guide ring 82 increases the support performance of the piston 8, improves the wear resistance of the piston 8, and the self-lubricating bearing 83 supports the guide rod 80, thereby prolonging the service life of each part.
In this embodiment, the driving mechanism 3 employs a servo motor. As shown in fig. 1, an output shaft 31 of the servo motor is connected to the lead screw 4 through a coupling 20. The coupling 20 is covered with a sleeve 21, the side wall of the sleeve 21 is processed with 2 stepped holes 211 (shown in fig. 16), the upper parts of the 2 stepped holes 211 are in a tapered threaded hole structure, and a throat plug 212 is installed through threads. The both ends of sleeve 21 are equipped with preceding lagging 22 and back lagging 23 respectively, and preceding lagging 22 is connected in back lid 13, and servo motor installs in back lagging 23. Specifically, as shown in fig. 15, the front sleeve plate 22 has a structure in which the middle is square and the right side is cylindrical, stepped holes are formed in the front sleeve plate 22, the stepped holes have a structure in which the left side is larger and the right side is smaller, 4 counter bores E are formed in the left end surface of the front sleeve plate 22, and the counter bores E penetrate through the front sleeve plate 22. As shown in fig. 17, the rear sleeve plate 23 has a square middle portion and a cylindrical left side portion, a stepped hole having a large right side and a small left side portion is formed in the rear sleeve plate 23, and 4 threaded holes E' having a certain depth and arranged in an annular array are formed in a left end surface of the square rear sleeve plate 23. As shown in fig. 16, the sleeve 21 is a hollow cylindrical structure, and 4 through holes E ″ are formed in an annular array in the wall of the sleeve 21. The front sleeve plate 22, the sleeve 21 and the rear sleeve plate 23 are locked into a whole by a hexagon socket steel screw K5. The right end face of the square structure of the front sleeve plate 22 is provided with 4 through holes F (shown in fig. 15), the right end face of the square structure of the rear cover 13 is provided with 4 threaded holes F' (shown in fig. 4) with a certain depth, and the front sleeve plate 22 and the rear cover 13 are locked together through a hexagon socket steel screw K6. As shown in fig. 17, the right end surface of the rear cover 13 is formed with 4 screw holes G having a certain depth in an annular array for assembly with the servo motor. During assembly, an internal hexagonal wrench can penetrate through the stepped hole 211 of the sleeve 21 to screw the locking bolt on the coupler 20 tightly, so that the output shaft 31 of the servo motor is clamped, and the mounting throat plug 212 can prevent external dust and impurities from entering the sleeve 21, thereby being beneficial to prolonging the service life of the coupler 20.
As shown in fig. 1 and 6, in the concrete structure of the screw rod 4, a first shaft 41, a second shaft 42 and a third shaft 43 extend from one end of the screw rod 4 away from the piston rod 7 in sequence, the first shaft 41 and the screw rod 4 form a first shaft shoulder 411, and the second shaft 42 and the first shaft 41 form a second shaft shoulder 421. A first deep groove ball bearing 131 and a second deep groove ball bearing 132 are provided in the rear cover 13. A bushing 412 (shown in fig. 9) is sleeved on the first shaft 41, and two ends of the bushing 412 are respectively abutted against the first shoulder 411 and the inner ring of the first deep groove ball bearing 131. The second shaft 42 is provided with external threads and is sleeved with a precision nut 6, the second deep groove ball bearing 132 protrudes out of the second shaft shoulder 421, the precision nut 6 abuts against the inner ring of the second deep groove ball bearing 132, and the side wall of the precision nut 6 is provided with a copper gasket 61 and a set screw 62 (shown in fig. 8) to abut against the second shaft 42. The third shaft 43 and the output shaft 31 of the servo motor are both connected with the coupler 20 through a double-head circular countersunk key 201. The servo motor is started, the third shaft 43 is driven to rotate through the coupler 20, the whole screw rod 4 is driven to rotate, the copper gasket 61 and the stop screw 62 in the precise nut 6 can reinforce the connection between the precise nut 6 and the second shaft 42, the bushing 412, the first deep groove ball bearing 131, the second deep groove ball bearing 132 and the precise nut 6 are reasonably installed, the first deep groove ball bearing 131 and the second deep groove ball bearing 132 can be firmly installed in the rear cover 13, the stability of the second shaft 42 in operation can be ensured, and the stability of the rotation of the screw rod 4 is improved.
The piston rod 7 is provided with a vent hole 72, and the vent hole 72 is communicated with the accommodating cavity 71. The front cover 12 is provided with a first muffler 103 through threads, a first exhaust hole 121 is formed in the mounting position of the first muffler 103 on the front cover 12, the first exhaust hole 121 can be arranged in an L-shaped structure, the first exhaust hole 121 extends from the front cover 12 to the cavity 10, and the first muffler 103, the first exhaust hole 121, the cavity 10, the vent hole 72 and the accommodating cavity 71 form an air exhaust channel. The rear cover 13 is provided with the second muffler 104 by a screw thread, a second exhaust hole 133 is formed in the rear cover 13 at the position where the second muffler 104 is installed, the second exhaust hole 133 may be provided in an L-shaped structure, the second exhaust hole 133 extends from the rear cover 13 to the cavity 10, and the second muffler 104, the second exhaust hole 133 and the cavity 10 form an air exhaust channel. Thus, air inside the guillotine can be discharged through the first muffler 103 and the second muffler 104, and noise pollution can be avoided.
The knife forging device provided by the invention has the advantages that all parts are reasonably assembled, the knife forging device is different from the knife forging device taking a traditional pneumatic control system as a power source, the knife forging device provided by the invention utilizes the spiral motion of the screw rod 4 and the screw rod nut 5 to generate thrust to push the piston 8 to drive the piston rod 7 to move, the piston 8 is guided and limited through the guide rod 80 to ensure that the piston rod 7 does not rotate and only horizontally moves, a closed space is formed when the piston rod 7 enters the pressurizing cylinder 9, the oil pressure rises and moves forwards along with the piston rod 7, and the oil is injected into the execution element from the joint port 901 of the end cover 90 of the pressurizing cylinder, so that the execution element obtains high-pressure oil, and thus, large output force is obtained. The screw rod 4 and the screw rod nut 5 are good in transmission stability, high in precision and free of creeping phenomenon, so that the whole cutter beater operates stably. The cutter beater of the structure replaces the traditional cutter beater of a pneumatic control system, avoids the phenomenon of sending large exhaust due to the reversing of the electromagnetic valve, and timely discharges the air in the cutter beater through the first silencer 103 and the second silencer 104, thereby avoiding the problem of noise pollution. The novel knife forging device is suitable for occasions with high precision requirements, and is particularly suitable for the field of machining center equipment.
The foregoing describes only some embodiments of the present invention and modifications and variations thereof will be apparent to those skilled in the art without departing from the spirit and scope of the invention.
Claims (9)
1. A cutter beater utilizing a ball screw to transmit power comprises a cylinder body (11) and a piston rod (7), wherein a front cover (12) and a rear cover (13) are respectively arranged at two ends of the cylinder body (11) to form a cavity (10), and the cutter beater is characterized in that a screw rod (4) is arranged in the cylinder body (11), a screw rod nut (5) capable of moving back and forth relative to the screw rod (4) is sleeved on the screw rod (4), one end of the screw rod (4) is connected with a driving mechanism (3) for driving the screw rod (4) to rotate, a containing cavity (71) for containing the other end of the screw rod (4) is arranged in the piston rod (7), the piston rod (7) is connected with the screw rod nut (5), the front cover (12) is connected with a pressurizing barrel (9) with a hollow structure, a pressurizing barrel end cover (90) is sleeved at the end part of the pressurizing barrel (9), and a joint opening (901) is arranged on the side wall of the pressurizing barrel end cover (90), the outer wall of the piston rod (7) is tightly matched with the front cover (12), the piston rod (7) can penetrate through the front cover (12) to enter the pressurizing cylinder (9), and an oil chamber (100) is formed from the front end of the piston rod (7) to the joint port (901).
2. The unclamping device utilizing a ball screw to transmit according to claim 1, characterized in that one end of the piston rod (7) close to the rear cover (13) is connected with a piston (8), the other end of the piston (8) is connected with a screw nut (5), a guide rod (80) penetrates through the piston (8), and two ends of the guide rod (80) are respectively connected with the front cover (12) and the rear cover (13).
3. The sharpener utilizing the ball screw to transmit power according to claim 2, wherein the outer wall of the piston (8) is provided with a plurality of guide ring grooves (81), each guide ring groove (81) is internally provided with a guide ring (82), each guide ring (82) is abutted against the inner wall of the cylinder body (11), the piston (8) is internally embedded with a self-lubricating bearing (83), and the guide rod (80) is sleeved with the self-lubricating bearing (83).
4. The sharpener utilizing the ball screw to transmit power according to claim 1 or 3, wherein the driving mechanism (3) adopts a servo motor, an output shaft (31) of the servo motor is connected with the screw through a coupler (20), a sleeve (21) is arranged outside the coupler (20), the sleeve (21) is provided with a stepped hole (211), the stepped hole (211) is connected with a throat plug (212) through threads, a front sleeve plate (22) and a rear sleeve plate (23) are respectively arranged at two ends of the sleeve (21), the front sleeve plate (22) is connected with the rear cover (13), and the servo motor is installed on the rear sleeve plate (23).
5. The unclamping device utilizing a ball screw to transmit according to claim 4, wherein a first shaft (41), a second shaft (42) and a third shaft (43) sequentially extend from one end of the screw rod (4) far away from the piston rod (7), the first shaft (41) and the screw rod (4) form a first shaft shoulder (411), the second shaft (42) and the first shaft (41) form a second shaft shoulder (421), a first deep groove ball bearing (131) and a second deep groove ball bearing (132) are arranged in the rear cover (13), a bushing (412) is sleeved on the first shaft (41), two ends of the bushing (412) respectively abut against the first shaft shoulder (411) and an inner ring of the first deep groove ball bearing (131), an external thread (422) is arranged on the second shaft (42) and a precision nut (6) is sleeved on the second deep groove ball bearing (132), and the second deep groove ball bearing (132) protrudes out of the second shaft shoulder (421), the precision nut (6) is close to the inner ring of the second deep groove ball bearing (132), the side wall of the precision nut (6) is provided with a copper gasket (61) and a stop screw (62) to abut against the second shaft (42), and the third shaft (43) and the output shaft (31) of the servo motor are connected with the coupler (20) through a double-head circular countersunk key (201).
6. The tool sharpener utilizing the ball screw to transmit power according to claim 1, wherein a step shaft (91) is arranged on one side, close to the front cover (12), of the pressurizing cylinder (9), a tool withdrawal groove (92) is formed in the root of the step shaft (91), a stopper (93) is embedded in the tool withdrawal groove (92), the stopper (93) is a two-piece semicircular ring structure in a symmetrical shape, the step shaft (91) is embedded in the front cover (12), a fixing plate (94) is sleeved outside the pressurizing cylinder (9), the fixing plate (94) is fixedly connected to the front cover (12), the stopper (93) is matched with the inner wall of the fixing plate (94), and the stopper (93) abuts against the front cover (12).
7. The unclamping device utilizing the ball screw for transmission according to claim 1, characterized in that the inner cavity of the front cover (12) is provided with a plurality of inner grooves, each inner groove is provided with a first sealing member (101), the first sealing member (101) can increase the sealing performance of the front cover (12) and the piston rod (7) and the front cover (12) and the pressurizing cylinder (9), and the joint of the pressurizing cylinder (9) and the pressurizing cylinder end cover (90) is provided with a second sealing member (102).
8. The tool sharpener utilizing the ball screw for transmission according to claim 1, wherein the piston rod (7) is provided with a vent hole (72), the vent hole (72) is communicated with the accommodating cavity (71), the front cover (12) is provided with a first silencer (103), a first exhaust hole (121) is formed in the front cover (12) at the installation position of the first silencer (103), the first exhaust hole (121) extends from the front cover to the cavity, the first silencer (103), the first exhaust hole (121), the cavity (10), the vent hole (72) and the accommodating cavity (71) form an air exhaust channel, the rear cover (13) is provided with a second silencer (104), a second exhaust hole (133) is formed in the rear cover (13) at the installation position of the second silencer (104), and the second exhaust hole (133) extends from the rear cover (13) to the cavity (10), the second muffler (104), the second exhaust hole (133) and the cavity (10) form an air exhaust channel.
9. The sharpener using the ball screw for transmission according to claim 1, wherein the front cover (12) is provided with an oil hole (122), the oil hole (122) extends to the inner wall of the front cover (12), an oil box (105) is connected to the oil hole (122) of the front cover (12), and a third sealing member (106) is arranged between the oil box (105) and the front cover (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110487866.XA CN113182912A (en) | 2021-04-28 | 2021-04-28 | Cutter beating device utilizing ball screw to carry out transmission |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110487866.XA CN113182912A (en) | 2021-04-28 | 2021-04-28 | Cutter beating device utilizing ball screw to carry out transmission |
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| CN113182912A true CN113182912A (en) | 2021-07-30 |
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| CN202110487866.XA Pending CN113182912A (en) | 2021-04-28 | 2021-04-28 | Cutter beating device utilizing ball screw to carry out transmission |
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