CN113618028B - Core box lifting device on core making machine - Google Patents
Core box lifting device on core making machine Download PDFInfo
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- CN113618028B CN113618028B CN202110863131.2A CN202110863131A CN113618028B CN 113618028 B CN113618028 B CN 113618028B CN 202110863131 A CN202110863131 A CN 202110863131A CN 113618028 B CN113618028 B CN 113618028B
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- gear
- shaft
- ball screw
- ratchet wheel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C19/00—Components or accessories for moulding machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C13/00—Moulding machines for making moulds or cores of particular shapes
- B22C13/12—Moulding machines for making moulds or cores of particular shapes for cores
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Abstract
The invention particularly discloses a core making machine upper core box lifting device which comprises a synchronous lifting mechanism and a self-locking mechanism; the synchronous lifting mechanism comprises a servo motor and a rectangular lifting frame, the output end of the servo motor is in key connection with a worm shaft for power transmission, the worm shaft is in meshing transmission connection with a worm wheel, the worm wheel is fixedly connected with a driving worm wheel shaft through a key, bevel gears are fixedly mounted at two ends of the worm wheel shaft and are meshed with the bevel gears, the bevel gears are mounted on gear shafts, the bevel gears are mounted at two sides of the gear shafts and are meshed with the bevel gears, the gears are meshed with the gears to drive the self-locking main shaft to rotate, and four corners of the rectangular lifting frame are fixedly mounted on ball screw nuts; the self-locking mechanism comprises a self-locking main shaft and a pawl, a gear is installed on the self-locking main shaft, and the gear, a brake disc and an adjusting block are installed on a ball screw shaft. Reasonable mechanism layout and structural design promote the core making process to be more convenient and faster, and ensure the core making quality. Has the advantages of high efficiency, low energy consumption, compact structure, economy, practicality and the like.
Description
Technical Field
The invention relates to the technical field of core making machines, in particular to a lifting device for a core box on a core making machine.
Background
Casting is widely used in industrial production, and in mass production, casting can improve production efficiency, so that casting is an important part in current machining production. In casting, there is inevitably the production of sand cores, and thus core making machines are of paramount importance. Core making machines in current industrial production are divided into three categories: shell core machines, hot core box core machines, and cold core box core machines. Most of the hydraulic drives are adopted, the structure is complex, the equipment is expensive, the production efficiency is low, the energy consumption is high, the pollution is easy to cause, and the requirements of green manufacturing are not met.
The traditional core making method adopts manual core making, and the core making method has the defects of low efficiency, poor quality of sand cores and the like. Therefore, a shell core machine and a core shooter are widely adopted in subsequent industrial production to manufacture the sand core, the common core making machine has two actions of die assembly and die separation, the synchronism of lifting is difficult to ensure in the lifting process of the upper core box, and a hydraulic driving mode is mostly adopted, so that the production efficiency is reduced, the materials are wasted, the production cost is increased, and the environmental pollution is very easy to cause.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a core box lifting device on a core making machine.
In order to achieve the purpose, the invention provides the following technical scheme: a lifting device for an upper core box of a core making machine comprises a synchronous lifting mechanism and a self-locking mechanism;
the synchronous lifting mechanism comprises a servo motor and a rectangular lifting frame, the servo motor is fixed on the top of the machine body, the top of the machine body is fixed on the machine body, the output end of the servo motor is in key connection with a first worm shaft for power transmission, the first worm shaft is in meshing transmission connection with a first worm gear, the first worm gear is in fixed connection with a second worm gear shaft through a key, first bevel gears are fixedly installed at two ends of the second worm gear shaft, the first bevel gears are meshed with second bevel gears, the second bevel gears are installed on gear shafts, third bevel gears are installed at two sides of the gear shafts, the third bevel gears are meshed with fourth bevel gears, the fourth bevel gears are installed on a self-locking main shaft, the self-locking main shaft is fixedly connected with the first gears, the first gears are meshed with the second gears to drive a self-locking main shaft to rotate, the middle of the second gears is fixedly connected with a ball screw shaft to drive four ball screw shafts to rotate, and the rectangular lifting frame is fixedly installed on nuts of the ball screw shaft;
the self-locking mechanism comprises a self-locking main shaft, a pawl, a first gear, a second gear, a ratchet wheel, a brake disc and an adjusting block, wherein the second gear is rotatably arranged on a ball screw shaft through a trapezoidal thread; in the working process of the self-locking mechanism, the ball screw shaft rotates, the second gear can move towards the direction of the ratchet wheel under the action of the trapezoidal threads, the brake disc does not move in the axial direction of the ball screw, and the second gear and the brake disc clamp the ratchet wheel;
in the lifting process, a gear shaft of the lifting mechanism is driven to rotate through a servo motor, so that third bevel gears on two sides of the gear shaft input power to a self-locking main shaft of a self-locking device, the self-locking main shaft rotates to transmit the power to a second gear on a ball screw shaft through a first gear, the second gear transmits motion through trapezoidal threads under the action of axial force, the second gear moves towards a ratchet wheel, the ratchet wheel moves along the ball screw shaft in the same direction after receiving the axial force transmitted by the second gear, a brake disc always keeps still, the ratchet wheel clamps the ratchet wheel under the action of the second gear and the brake disc, an adjusting block is not contacted with the second gear, a pawl is not meshed with teeth of the ratchet wheel, and the rectangular lifting frame and an upper core box are driven to lift by the power output by the ball screw shaft;
in the lifting process of the rectangular lifting frame and the upper core box, if stopping is needed midway or the lifting process is intentionally caused, the ball screw shaft rotates in the opposite direction under the action of the gravity of the rectangular lifting frame and the upper core box, the ball screw shaft moves towards the ratchet direction under the action of the axial force to push the second gear to further move towards the ratchet direction, the brake disc clamps the ratchet wheel, at the moment, the rotating direction of the ball screw shaft is changed, the pawl can be meshed with the teeth of the ratchet wheel, and the rectangular lifting frame and the upper core box are ensured not to descend.
Preferably, the output end of the servo motor is connected with the first worm shaft through a coupling.
Preferably, the first worm shaft is rotatably mounted on a lower case, and the lower case is fixed on the top of the body.
Preferably, the ball screw shaft rotates to drive the ball screw nut to move up and down.
Preferably, the upper core box is arranged on the rectangular lifting frame to synchronously lift.
Compared with the prior art, the invention has the following beneficial effects:
according to the synchronous lifting device for the upper core box, when core making is carried out, the upper core box and the lower core box are aligned, the lower core box is static in a working area, power is simultaneously transmitted to the ball screw shaft after the servo motor is started, so that the ball screw nut pair drives the upper core box to move up and down, when an accident occurs or the work is stopped in the lifting process, the self-locking mechanism can lock the ball screw pair, and the rectangular lifting frame level upper core box is prevented from descending. Reasonable mechanism layout and structural design promote the core making process to be more convenient and faster, and ensure the core making quality. Has the advantages of high efficiency, low energy consumption, compact structure, environmental protection, economy, practicality and the like.
Drawings
FIG. 1 is a front view of the structure of the present invention;
FIG. 2 is a right side view of the structure of the present invention;
FIG. 3 is a top view of the structure of the present invention;
FIG. 4 is a schematic view of a self-locking mechanism of the present invention;
fig. 5 isbase:Sub>A structural view atbase:Sub>A-base:Sub>A of fig. 4 according to the present invention.
Detailed Description
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the various embodiments of the invention. It should be understood, however, that these physical details should not be construed as limiting the invention. That is, in some embodiments of the invention, such physical details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.
In addition, the descriptions related to "first", "second", etc. in the present invention are used for descriptive purposes only, do not specifically refer to an order or sequence, and do not limit the present invention, but merely distinguish components or operations described in the same technical terms, and are not to be construed as indicating or implying any relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1-5, the lifting device for the upper core box of the core making machine of the present invention comprises a synchronous lifting mechanism and a self-locking mechanism;
the synchronous lifting mechanism comprises a servo motor 1 and a rectangular lifting frame 18, wherein the servo motor 1 is fixed on a machine body top 20, the machine body top 20 is fixed on a machine body 19, the output end of the servo motor 1 is in power transmission with a first worm shaft 3 through key connection, the first worm shaft 3 is in meshing transmission with a first worm gear 4, the first worm gear 4 is in driving connection with a second worm gear shaft 21 through key connection, first bevel gears 5 are fixedly installed at two ends of the second worm gear shaft 21, the first bevel gears 5 are meshed with second bevel gears 6, the second bevel gears 6 are installed on a gear shaft 8, third bevel gears 9 are installed at two sides of the gear shaft 8, the third bevel gears 9 are meshed with fourth bevel gears 10, the fourth bevel gears 10 are installed on a self-locking main shaft 11, the self-locking main shaft 11 is fixedly connected with a first gear 12, the first gear 12 is meshed with a second gear 14, a ball screw shaft 22 is in threaded connection with the middle of the second gear 14, the second gear 14 drives the ball screw shaft 22 to rotate, and four corners of the rectangular lifting frame 18 are fixedly installed on ball nuts 24 of the ball shaft 22;
the self-locking mechanism comprises a self-locking main shaft 11, a pawl 23, a first gear 12, a second gear 14, a ratchet wheel 15, a brake disc 16 and an adjusting block 13, wherein the second gear 14 is rotatably installed on a ball screw shaft 22 through trapezoidal threads, the brake disc 16 is fixedly connected and installed on the ball screw shaft 22 through a key, the adjusting block 13 and the ball screw shaft 22 are installed by processing the upper end of the ball screw shaft 22 into a regular hexagonal prism, the ratchet wheel 15 is installed on the brake disc 16 through clearance fit, and teeth of the ratchet wheel 15 are meshed with the pawl 23; in the working process of the self-locking mechanism, the ball screw shaft 22 rotates, the second gear 14 can move towards the ratchet wheel 15 under the action of the trapezoidal threads, the brake disc 16 does not move in the axial direction of the ball screw shaft 22, and the second gear 14 and the brake disc 16 clamp the ratchet wheel 15;
further, the output end of the servo motor 1 is connected with a first worm shaft 3 through a coupling 2.
Further, the first worm shaft 3 is rotatably mounted on a lower case 7, and the lower case 7 is fixed to the body top 20.
Further, the ball screw shaft 22 rotates and drives the ball screw nut 24 to move up and down.
The working principle of the self-locking device is as follows: in the lifting process, the servo motor 1 drives the gear shaft 8 of the lifting mechanism, so that the third bevel gears 9 on two sides of the gear shaft 8 input power to the self-locking main shaft 11 of the self-locking device, the self-locking main shaft 11 rotates to transmit the power to the second gear 14 on the ball screw shaft 22 through the first gear 12, the second gear 14 transmits motion through trapezoidal threads under the action of axial force, so that the second gear 14 moves towards the ratchet wheel 15, the ratchet wheel 15 moves along the ball screw shaft 22 in the same direction after receiving the axial force transmitted by the second gear 14, the brake disc 16 is kept still all the time, so that the ratchet wheel 15 clamps the ratchet wheel 15 under the action of the second gear 14 and the brake disc 16, the adjusting block 13 is not in contact with the second gear 14, the pawl 23 is not meshed with the teeth of the ratchet wheel 15, and the power output by the ball screw shaft 22 drives the rectangular lifting frame 18 and the upper core box 17 to lift.
During the lifting process of the rectangular lifting frame 18 and the upper core box 17, if stopping is needed in the midway or happens intentionally, the ball screw shaft 22 rotates in the opposite direction under the action of the gravity of the rectangular lifting frame 18 and the upper core box 17, the ball screw shaft 22 moves towards the ratchet wheel 15 under the action of axial force to push the second gear 14 to further move towards the ratchet wheel 15 to clamp the ratchet wheel 15 with the brake disc 16, at the moment, the rotation direction of the ball screw shaft 22 changes, the pawl 23 is meshed with the teeth of the ratchet wheel 15, and the rectangular lifting frame 18 and the upper core box 17 are ensured not to descend.
When the rectangular lifting frame 18 and the upper core box 17 descend, the servo motor 1 rotates reversely to drive the self-locking main shaft 11 to rotate reversely, the first gear 12 drives the second gear 14 to rotate reversely, the second gear 14 moves in the direction opposite to the direction of the ratchet wheel 15 along the axial direction under the action of the trapezoidal threads, so that the ratchet wheel 15 is not clamped by the second gear 14 and the brake disc 16, and a gap is formed between the ratchet wheel 15 and the second gear 14 and the brake disc 16. When the second gear 14 moves a certain distance in the direction opposite to the ratchet 15, the protruding portion of the right end face of the second gear 14 will be engaged with the adjusting block 13, the adjusting block 13 is installed on the ball screw shaft 22 through the regular hexagonal plane, and at this time, the adjusting block 13 will drive the ball screw shaft 22 to rotate together. At this time, although the ratchet wheel 15 is engaged with the pawl 23, since the ratchet wheel 15 is not clamped by the second gear 14 and the brake disc 16, the ratchet wheel 15 slides on the hub of the brake disc 16, and the rectangular lifting frame 18 and the upper core box 17 continue to descend.
During the descending process, the rectangular lifting frame 18 and the upper core box 17 need to be stopped or have an emergency, the ball screw shaft 22 will continue to rotate under the action of the gravity of the rectangular lifting frame 18 and the upper core box 17, at this time, the second gear 14 mounted on the ball screw shaft 22 will transmit motion with the trapezoidal thread, so that the second gear moves to the ratchet wheel 15 along the axial direction, at this time, the end surface of the second gear 14 on the ball screw shaft 22 and the end surface of the brake disc 16 provide pressure to clamp the ratchet wheel 15, so that the ratchet wheel 15 cannot move relative to the second gear 14 and the brake disc 16 under the action of friction force, meanwhile, the second gear 14 is separated from the adjusting block 13, the pawl 23 is meshed with the ratchet wheel 15, and the rectangular lifting frame 18 and the upper core box 17 cannot continuously descend.
The synchronous lifting device and the self-locking device can greatly improve the stability of synchronous lifting of the upper core box. Simple structure, convenient use, economy and applicability.
The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (5)
1. A core making machine upper core box lifting device is characterized by comprising a synchronous lifting mechanism and a self-locking mechanism;
the synchronous lifting mechanism comprises a servo motor (1) and a rectangular lifting frame (18), the servo motor (1) is fixed on a machine body top (20), the machine body top (20) is fixed on a machine body (19), the output end of the servo motor (1) is connected with the first worm shaft (3) through a key for power transmission, the first worm shaft (3) is in meshing transmission connection with the first worm wheel (4), the first worm wheel (4) is fixedly connected with and drives a second worm wheel shaft (21) through a key, a first bevel gear (5) is fixedly arranged at the two ends of the second worm wheel shaft (21), the first bevel gear (5) is meshed with the second bevel gear (6), the second bevel gear (6) is arranged on a gear shaft (8), third bevel gears (9) are arranged on two sides of the gear shaft (8), the third bevel gear (9) is meshed with a fourth bevel gear (10), the fourth bevel gear (10) is arranged on the self-locking main shaft (11), the self-locking main shaft (11) is fixedly connected with a first gear (12), the first gear (12) is meshed with the second gear (14), the middle of the second gear (14) is in threaded connection with a ball screw shaft (22), the second gear (14) drives the ball screw shaft (22) to rotate, four corners of the rectangular lifting frame (18) are fixedly arranged on nuts (24) of the ball screw shaft (22);
the self-locking mechanism comprises a self-locking main shaft (11), a pawl (23), a first gear (12), a second gear (14), a ratchet wheel (15), a brake disc (16) and an adjusting block (13), wherein the second gear (14) is rotatably installed on a ball screw shaft (22) through trapezoidal threads, the brake disc (16) is fixedly connected and installed on the ball screw shaft (22) through a key, the adjusting block (13) and the ball screw shaft (22) are installed by processing the upper end of the ball screw shaft (22) into a regular hexagonal prism, the ratchet wheel (15) is installed on the brake disc (16) through clearance fit, and teeth of the ratchet wheel (15) are meshed with the pawl (23); in the working process of the self-locking mechanism, the ball screw shaft (22) rotates, the second gear (14) can move towards the direction of the ratchet wheel (15) under the action of the trapezoidal threads, the brake disc (16) does not move in the axial direction of the ball screw shaft (22), and the second gear (14) and the brake disc (16) clamp the ratchet wheel (15);
in the lifting process, a gear shaft (8) of a lifting mechanism is driven to rotate through a servo motor (1), so that third bevel gears (9) on two sides of the gear shaft (8) input power to a self-locking main shaft (11) of a self-locking device, the self-locking main shaft (11) rotates to transmit the power to a second gear (14) on a ball screw shaft (22) through a first gear (12), the second gear (14) moves to the direction of a ratchet wheel (15) through trapezoidal thread transmission under the action of axial force, the ratchet wheel (15) moves along the ball screw shaft (22) in the same direction after receiving the axial force transmitted by the second gear (14), a brake disc (16) is kept still all the time, the ratchet wheel (15) clamps the ratchet wheel (15) under the action of the second gear (14) and the brake disc (16), an adjusting block (13) is not in contact with the second gear (14), the ratchet wheel (23) is not meshed with the teeth of the ratchet wheel (15), and a power output box (18) of the ball screw shaft (22) and a lifting core (17) are driven to lift;
in the lifting process of the rectangular lifting frame (18) and the upper core box (17), if stopping is needed in the midway or the lifting process is intentionally generated, the ball screw shaft (22) rotates in the opposite direction under the action of the gravity of the rectangular lifting frame (18) and the upper core box (17), the ball screw shaft (22) moves towards the ratchet wheel (15) under the action of axial force, the second gear (14) is pushed to further move towards the ratchet wheel (15), the brake disc (16) clamps the ratchet wheel (15), at the moment, the rotating direction of the ball screw shaft (22) is changed, the pawl (23) can be meshed with the teeth of the ratchet wheel (15), and the rectangular lifting frame (18) and the upper core box (17) are ensured not to descend.
2. A lifting device for a core box on a core making machine according to claim 1, characterized in that the output end of said servo motor (1) is connected to the first worm shaft (3) through a coupling (2).
3. Core-making machine top-core box lifting device according to claim 1, characterized in that said first worm shaft (3) is rotatably mounted on a lower box (7), said lower box (7) being fixed to a machine body top (20).
4. Core making machine top box lifting device according to claim 1, characterized in that said ball screw shaft (22) drives in rotation the ball screw nut (24) up and down.
5. Core making machine upper core box lifting device according to claim 1, characterized in that said upper core box (17) is mounted on a rectangular lifting frame (18) with a synchronous lifting action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110863131.2A CN113618028B (en) | 2021-07-29 | 2021-07-29 | Core box lifting device on core making machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110863131.2A CN113618028B (en) | 2021-07-29 | 2021-07-29 | Core box lifting device on core making machine |
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| Publication Number | Publication Date |
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| CN113618028A CN113618028A (en) | 2021-11-09 |
| CN113618028B true CN113618028B (en) | 2023-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110863131.2A Active CN113618028B (en) | 2021-07-29 | 2021-07-29 | Core box lifting device on core making machine |
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| CN (1) | CN113618028B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06166079A (en) * | 1992-11-30 | 1994-06-14 | Nissei Plastics Ind Co | Safety device in mold clamping device |
| JP3049011U (en) * | 1997-11-18 | 1998-05-29 | 折尾精密株式会社 | Molding equipment for resin sealing |
| CN201257497Y (en) * | 2008-09-11 | 2009-06-17 | 冯新林 | Cold box core shooter |
| CN201579381U (en) * | 2009-11-30 | 2010-09-15 | 苏州苏铸成套装备制造有限公司 | Core remover for hot core box core shooter |
| CN108262452A (en) * | 2018-03-12 | 2018-07-10 | 苏州明志科技有限公司 | A kind of electricity drives molding core making machine |
-
2021
- 2021-07-29 CN CN202110863131.2A patent/CN113618028B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06166079A (en) * | 1992-11-30 | 1994-06-14 | Nissei Plastics Ind Co | Safety device in mold clamping device |
| JP3049011U (en) * | 1997-11-18 | 1998-05-29 | 折尾精密株式会社 | Molding equipment for resin sealing |
| CN201257497Y (en) * | 2008-09-11 | 2009-06-17 | 冯新林 | Cold box core shooter |
| CN201579381U (en) * | 2009-11-30 | 2010-09-15 | 苏州苏铸成套装备制造有限公司 | Core remover for hot core box core shooter |
| CN108262452A (en) * | 2018-03-12 | 2018-07-10 | 苏州明志科技有限公司 | A kind of electricity drives molding core making machine |
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| Publication number | Publication date |
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| CN113618028A (en) | 2021-11-09 |
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