CN107755571B - Lower ejection mechanism - Google Patents
Lower ejection mechanism Download PDFInfo
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- CN107755571B CN107755571B CN201610694805.XA CN201610694805A CN107755571B CN 107755571 B CN107755571 B CN 107755571B CN 201610694805 A CN201610694805 A CN 201610694805A CN 107755571 B CN107755571 B CN 107755571B
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- cam
- lower ejection
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- 230000007246 mechanism Effects 0.000 title claims abstract description 32
- 230000005540 biological transmission Effects 0.000 claims abstract description 22
- 230000033001 locomotion Effects 0.000 claims abstract description 19
- 230000009471 action Effects 0.000 claims description 20
- 238000013016 damping Methods 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 13
- 239000003921 oil Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 238000012546 transfer Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000007704 transition 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
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/02—Ejecting devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention provides a lower ejection mechanism which comprises a buffer device arranged on a pull rod, wherein the buffer device applies buffer force to the pull rod, and the buffer force is opposite to the motion direction of the pull rod. In the prior art, a reset device usually adopts a reset cylinder, after a workpiece is ejected, the reset device is started, in the prior art, the reset device usually only adopts a single reset cylinder, and the reset cylinder can drive a transmission rod to provide a huge impact force for a cam, so that the cam is damaged. The lower ejection mechanism provided by the invention comprises the buffer device, and the buffer device can give a force opposite to the motion direction of the pull rod to the pull rod in the recovery process of the pull rod, so that the impact force of the transmission rod on the cam is effectively relieved, and the service life of the cam is prolonged.
Description
Technical Field
The invention relates to the technical field of part machining, in particular to a lower ejection mechanism.
Background
The ejection mechanism is called as a demoulding mechanism, and a die cavity for holding a workpiece is often concavely arranged below the processing platform in the material processing process, and after the processing is finished, the workpiece is ejected out of the die cavity through the ejection mechanism, so that a mechanical arm or a worker can conveniently take the workpiece.
The ejection mechanisms in the prior art are mainly divided into two types. The first category is a hydraulic ejection mechanism, and reference CN101758645B discloses an ejection rotating device for an ejection cylinder of a hydraulic machine, comprising: the workbench is provided with a groove in the top surface, and a supporting plate for placing a workpiece is arranged in the groove. The center of the workbench is provided with a channel, a bearing seat, a bearing and a piston rod are arranged in the channel from top to bottom, when a workpiece on the supporting plate needs to be ejected out of the groove, the piston rod is started to drive the bearing seat and the bearing to move upwards, and the bearing seat ejects the supporting plate out of the groove and leaves the top surface of the workbench, so that ejection is completed.
However, before the hydraulic ejection mechanism is used, hydraulic oil needs to be filled in the piston, meanwhile, hydraulic ejection belongs to a flexible process, and the main problems of the flexible process are slow response and slow speed, so that the efficiency of the whole ejection process can be influenced.
Meanwhile, another type of ejection structure is disclosed in the prior art: and the cylinder is independently reset. In the structure, the cam performs periodic circumferential rotation, meanwhile, a linear lever is arranged in the structure, one end of the lever is fixed to form a fixed part, the other end of the lever is connected with the pull rod to form a movable part, the central part of the linear lever can be impacted once when the cam rotates for one circle, the movable part of the lever can drive the pull rod to move downwards, and a swing rod supporting arm connected with the pull rod moves in the opposite direction to the movement direction of the pull rod to drive the ejector rod to eject a machined part. In the resetting process after the workpiece is ejected, the resetting cylinder drives the swing rod bracket to move in the opposite direction to the ejection direction, so that the swing rod bracket is reset.
The reaction of the independent reset structure of the air cylinder is quicker, and the production efficiency is higher. However, in the resetting process, the resetting cylinder has larger impact inertia, the linear lever is driven to violently squeeze the cam, the axis of the cam is axially fixed with the gear, so that the linear lever generates larger shearing force on the gear shaft, the gear shaft is deformed, and the service life of the gear shaft is shortened.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that in the prior art, the independent cylinder resetting structure is easy to impact the cam and the gear shaft in the resetting process, and the service lives of the cam and the gear shaft are influenced.
A lower ejection mechanism comprising: a body; a cam rotating around the gear shaft; the transmission rod is driven by the cam and provided with a fixed part and a movable part, and the movable part swings reciprocally around the fixed part under the drive of the cam; one end of the pull rod is rotationally connected with the movable part; one end of the ejection assembly is rotationally connected with the other end of the pull rod, the ejection action is executed under the drive of the pull rod so as to eject a workpiece, the other end of the ejection assembly is connected with the reset device, and the reset device is driven to execute the reset action opposite to the ejection action so as to drive the pull rod and the transmission rod to reset; the buffer device is arranged on the pull rod and applies buffer force to the pull rod, wherein the buffer force is opposite to the motion direction of the pull rod.
The buffer device is a spring assembly, and the spring assembly applies elastic buffer force to the pull rod, wherein the elastic buffer force is opposite to the motion direction of the pull rod.
The spring assembly is sleeved outside the pull rod, one end of the spring assembly is fixed to the machine body, and the other end of the spring assembly is fixed to the pull rod.
The spring assembly is arranged between rod bodies of the pull rod to divide the rod bodies into an upper rod body and a lower rod body which are mutually independent, and the spring assembly is respectively connected with the upper rod body and the lower rod body.
The buffer device is a rubber block which is arranged between rod bodies of the pull rod to separate the rod bodies into an upper rod body and a lower rod body which are mutually independent, and the rubber block is respectively and fixedly connected with the upper rod body and the lower rod body.
The transmission rod is an L-shaped swing rod and comprises a vertical arm and a cross arm which are connected, the free end of the vertical arm always abuts against the cam, the free end of the cross arm is a fixing part which is rotatably fixed on the machine body through a pin shaft, and the connecting part of the vertical arm and the cross arm is movably connected with one end of the pull rod.
The free end of the vertical arm, which always abuts against the cam, is provided with a roller, and the roller is in rolling contact with the outer edge of the cam.
The ejection assembly includes: a lower ejection shaft; a rotating part capable of reciprocally rotating around the lower ejection shaft, one end of which is connected with the other end of the pull rod; and the ejector rod can reciprocate and is arranged at the upper part of the other end of the rotating part and used for ejecting a workpiece.
The rotating part includes: one end of the lower swing rod is connected with the other end of the pull rod, and can drive the lower ejection shaft to rotate under the drive of the pull rod; the swing rod bracket arm is arranged side by side with the lower swing rod and synchronously rotates with the lower ejection shaft; the hydraulic swing rod is sleeved on the lower ejection shaft, the top end of the hydraulic swing rod is in contact with the ejector rod, and the hydraulic swing rod can rotate around the lower ejection shaft in the forward direction under the driving of the swing rod supporting arm to drive the ejector rod to move upwards.
The resetting device comprises: the reset cylinder is fixedly arranged on the machine body and provided with a piston which moves in a reciprocating manner; the reset swing rod is driven by the piston and is arranged side by side with the hydraulic swing rod, and the reset swing rod can enable the lower ejection shaft to rotate in the negative direction opposite to the positive rotation direction under the driving of the piston.
The rotating part further comprises a high-protection oil cylinder, one end of the high-protection oil cylinder is fixed, the other end of the high-protection oil cylinder is connected to the other end of the hydraulic swing rod, which is contacted with the ejector rod, and when the lower ejection shaft rotates negatively, the high-protection oil cylinder can enable the hydraulic swing rod to stay at the original position for a specific time.
The swing rod bracket arm is connected with the lower ejection shaft by a key.
The technical scheme of the invention has the following advantages:
1. The invention provides a lower ejection mechanism, comprising: a body; a cam rotating around the gear shaft; the transmission rod is driven by the cam and provided with a fixed part and a movable part, and the movable part swings reciprocally around the fixed part under the drive of the cam; one end of the pull rod is rotationally connected with the movable part; one end of the ejection assembly is rotationally connected with the other end of the pull rod, the ejection action is executed under the drive of the pull rod so as to eject a workpiece, the other end of the ejection assembly is connected with the reset device, and the reset device is driven to execute the reset action opposite to the ejection action so as to drive the pull rod and the transmission rod to reset; the buffer device is arranged on the pull rod and applies buffer force to the pull rod, wherein the buffer force is opposite to the motion direction of the pull rod.
In the prior art, a reset device usually adopts a reset cylinder, after a workpiece is ejected, the reset device is started, in the prior art, the reset device usually only adopts a single reset cylinder, and the reset cylinder can drive a transmission rod to provide a huge impact force for a cam, so that the cam is damaged.
In the lower ejection mechanism provided by the invention, all components are connected with each other, and hydraulic oil is filled in a traditional hydraulic ejection system instead of being used as transition, so that the working process of the technical scheme of the invention is more efficient. Meanwhile, the lower ejection mechanism provided by the invention comprises the buffer device, and the buffer device can provide a force opposite to the motion direction of the pull rod for the pull rod in the recovery process of the pull rod, so that the impact force of the transmission rod on the cam is effectively relieved, and the service life of the cam is prolonged.
2. The invention provides a lower ejection mechanism, wherein a buffer device is a spring assembly, and the spring assembly applies elastic buffer force to a pull rod, wherein the elastic buffer force is opposite to the motion direction of the pull rod.
The spring component can stretch and retract, and can play a role when the pull rod performs ejection or recovery.
3. The invention provides a lower ejection mechanism, wherein a spring assembly is arranged between rod bodies of a pull rod to separate the rod bodies into an upper rod body and a lower rod body which are mutually independent, and the spring assembly is respectively connected with the upper rod body and the lower rod body.
In the restoring process, the lower rod body moves upwards under the drive of the resetting device, and the spring assembly is clamped between the lower rod body and the upper rod body, so that the spring assembly is compressed to absorb the reduced distance after the position between the lower rod body and the upper rod body is reduced.
4. The invention provides a lower ejection mechanism, wherein a buffer device is a rubber block which is arranged between rod bodies of a pull rod to separate the rod bodies into an upper rod body and a lower rod body which are mutually independent, and the rubber block is fixedly connected with the upper rod body and the lower rod body respectively.
The rubber block has good deformability, and when the pull rod resets, the rubber block can play a buffering role through self deformation.
5. The invention provides a lower ejection mechanism, wherein a transmission rod is an L-shaped swing rod and comprises a vertical arm and a cross arm which are connected, the free end of the vertical arm always abuts against a cam, the free end of the cross arm is a fixing part which is rotatably fixed on a machine body through a pin shaft, and the connecting part of the vertical arm and the cross arm is movably connected with one end of a pull rod.
The rotation of the cam can be effectively transmitted to the pull rod through the cooperation of the vertical arm and the cross arm, so that the synchronous movement between the cam and the pull rod is ensured.
6. The invention provides a lower ejection mechanism, wherein a roller is arranged at the free end of a vertical arm, which always abuts against a cam, and the roller is in rolling contact with the outer edge of the cam.
Through the gyro wheel, the gyro wheel can drive the gyro wheel and rotate at the rotation in-process, reduces the frictional force of cam and transfer line in the contact in-process effectively, is favorable to the driven stability between cam and the transfer line.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of the lower ejection mechanism provided by the invention;
Fig. 2 is an assembly schematic diagram of the rotating part and the reset swing rod in the lower ejection mechanism provided by the invention;
reference numerals illustrate:
1-a fuselage; 2-cams; 3-gear shaft; 4-a transmission rod; 41-vertical arms; 42-cross arm; 43-pin shaft; 5-a pull rod; a 6-spring assembly; 7-a roller; 8-pushing down the shaft; 9-ejector rods; 10-lower swing rod; 11-a swing rod bracket; 12-a hydraulic swing rod; 13-resetting the cylinder; 14-resetting the swing rod; 15-high-protection oil cylinder.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1
The embodiment provides a lower ejection mechanism, including: a body 1; a cam 2 rotating around a gear shaft 3; the transmission rod 4 is driven by the cam 2 and is provided with a fixed part and a movable part, and the movable part swings back and forth around the fixed part under the drive of the cam 2; one end of the pull rod 5 is rotationally connected with the movable part; one end of the ejection assembly is rotationally connected with the other end of the pull rod 5, the ejection action is carried out under the drive of the pull rod 5 to eject a workpiece, the other end of the ejection assembly is connected with the reset device, and the reset device is driven to carry out the reset action opposite to the ejection action so as to drive the pull rod 5 and the transmission rod 4 to reset; the device also comprises a buffer device arranged on the pull rod 5, and the buffer device applies buffer force to the pull rod 5, wherein the buffer force is opposite to the movement direction of the pull rod 5.
In the prior art, the reset device usually adopts a reset cylinder 13, after the workpiece is ejected, the reset device is started, in the prior art, the reset device usually only adopts a single reset cylinder 13, and the reset cylinder 13 can drive a transmission rod 4 to apply a huge impact force to the cam 2, so that the cam 2 is damaged.
The lower ejection mechanism provided by the invention comprises a buffer device, and the buffer device can provide a force opposite to the movement direction of the pull rod 5 for the pull rod 5 in the recovery process of the pull rod 5, so that the impact force of the transmission rod 4 on the cam 2 is effectively relieved, and the service life of the cam 2 is prolonged.
In this embodiment, the damping device is a spring assembly 6, and the spring assembly 6 applies an elastic damping force to the pull rod 5 opposite to the movement direction of the pull rod 5. The spring assembly 6 is sleeved on the spring assembly 6 outside the pull rod 5, one end of the spring assembly 6 is fixed to the machine body 1, and the other end of the spring assembly 6 is fixed to the pull rod 5.
Specifically, the spring assembly 6 may be sleeved on the pull rod 5, or may be disposed outside the pull rod 5, where the spring assembly 6 is also fixed on the body 1 at one end and on the rod body of the pull rod 5 at the other end.
Specifically, as shown in fig. 1, when the reset action is performed, the pull rod 5 moves upward, at this time, the upper end of the spring assembly 6 is kept fixed, the lower end of the spring assembly 6 moves synchronously with the pull rod 5, and the relative movement between the upper end and the lower end of the spring assembly 6 compresses the spring assembly 6, so as to generate pressure for preventing the pull rod 5 from continuing to move upward, and further effectively relieve the impact of the drive rod 4 on the cam 2 caused by the violent upward movement of the pull rod 5.
As a modification, the spring assembly 6 provided in this embodiment is disposed between the rod bodies of the pull rod 5 to separate the rod bodies into an upper rod body and a lower rod body that are independent of each other, and the spring assembly 6 is connected to the upper rod body and the lower rod body respectively.
When the reset action is executed, the lower rod body moves upwards under the drive of the reset device, and the spring assembly 6 is clamped between the lower rod body and the upper rod body, so that the spring assembly 6 is compressed to absorb the reduced distance after the position between the lower rod body and the upper rod body is reduced.
In particular, the spring assembly 6 may employ a compression spring.
As a variant, the buffer device is a rubber block arranged between the rod bodies of the pull rod 5 to separate the rod bodies into an upper rod body and a lower rod body which are mutually independent, and the rubber block is respectively fixedly connected with the upper rod body and the lower rod body.
In this embodiment, the transmission rod 4 is an "L" shaped swing rod, and includes a vertical arm 41 and a cross arm 42 that are connected, a free end of the vertical arm 41 always abuts against the cam 2, a free end of the cross arm 42 is a fixing portion rotatably fixed on the machine body 1 through a pin 43, and a connection portion between the vertical arm 41 and the cross arm 42 is movably connected with the one end of the pull rod 5.
By the cooperation of the vertical arm 41 and the transverse arm 42 with each other, the rotation of the cam 2 can be effectively transmitted to the pull rod 5, ensuring synchronous movement between the cam 2 and the pull rod 5.
Meanwhile, the free end of the vertical arm 41 always abutting against the cam 2 is provided with a roller 7, and the roller 7 is in rolling contact with the outer edge of the cam 2.
Through gyro wheel 7, gyro wheel 7 can drive gyro wheel 7 rotation at the rotation in-process, reduces cam 2 and transfer line 4 effectively in the frictional force of contact in-process, is favorable to the stability of transmission between cam 2 and the transfer line 4.
In this embodiment, the ejection assembly includes: a lower ejection shaft 8; a rotating part capable of reciprocally rotating around the lower ejection shaft 8, one end of which is connected to the other end of the pull rod 5; and a push rod 9 which is arranged at the upper part of the other end of the rotating part and can reciprocate and is used for ejecting a workpiece.
The rotating part includes: one end of the lower swing rod 10 is connected with the other end of the pull rod 5 and can drive the lower ejection shaft 8 to rotate under the drive of the pull rod 5; the swing rod bracket arm 11 is arranged side by side with the lower swing rod 10 and synchronously rotates with the lower ejection shaft 8; the hydraulic swing rod 12 is sleeved on the lower ejection shaft 8, the top end of the hydraulic swing rod 12 is in contact with the ejector rod 9, and the hydraulic swing rod 12 can rotate around the lower ejection shaft 8 positively under the driving of the swing rod bracket arm 11 to drive the ejector rod 9 to move upwards.
Meanwhile, the swing rod bracket arm 11 is connected with the lower ejection shaft 8 by a key.
The specific ejection action is as follows: the cam 2 rotates, the transmission rod 4 is extruded when the cam 2 rotates, the transmission rod 4 drives the pull rod 5 to move downwards, the pull rod 5 drives the lower swing rod 10 to rotate clockwise, the lower swing rod 10 is connected with the lower ejection shaft 8 through a key, synchronous movement between the lower swing rod 10 and the lower ejection shaft is ensured, meanwhile, the lower ejection shaft 8 is connected with the swing rod supporting arm 11 through a key, the swing rod supporting arm 11 rotates under the driving of the lower ejection shaft 8 and jacks up the hydraulic swing rod 12, then the hydraulic swing rod 12 jacks up the ejector rod 9, the hydraulic swing rod 12 acts with a workpiece, and therefore the workpiece is ejected, and the ejection action is completed.
In this embodiment, the reset device includes: a reset cylinder 13 fixedly arranged on the machine body 1 and provided with a reciprocating piston; the reset swing rod 14 is driven by the piston and is arranged side by side with the hydraulic swing rod 12, and the reset swing rod 14 can enable the lower ejection shaft 8 to rotate in the negative direction opposite to the positive direction under the driving of the piston.
The positive rotation means the rotation direction of the rotating portion or the lower ejection shaft 8 when the ejection operation is performed, and the negative rotation means the rotation direction of the rotating portion or the lower ejection shaft 8 when the reset operation is performed, and the positive rotation is opposite to the negative rotation.
In this embodiment, the positive rotation is clockwise rotation, and the negative rotation is counterclockwise rotation.
In this embodiment, the rotating portion further includes a high-protection oil cylinder 15, one end of the high-protection oil cylinder 15 is fixed, the other end is connected to the other end of the hydraulic swing rod 12, which contacts with the ejector rod 9, and when the lower ejection shaft 8 rotates negatively, the high-protection oil cylinder 15 makes the hydraulic swing rod 12 stay at the original position for a specific time.
The reset action is executed as follows: firstly, the reset cylinder 13 drives the reset swing rod 14, the reset swing rod 14 is connected with the lower ejection shaft 8 through a key, at the moment, the reset swing rod 14 is under the action of the reset cylinder 13 to drive the lower ejection shaft 8 to rotate anticlockwise, then the lower ejection shaft 8 drives the lower swing rod 10 to rotate anticlockwise, the lower swing rod 10 drives the pull rod 5 to move upwards, and due to the action of the elastic component, the elastic component can relieve the upward violent movement of the pull rod 5.
Meanwhile, the hydraulic swing rod 12 is sleeved on the lower jacking shaft 8 and does not synchronously move with the lower jacking shaft 8, the high-protection oil cylinder 15 firstly enables the hydraulic swing rod 12 to be kept for a period of time, the hydraulic swing rod 12 supports the ejector rod 9, and a worker or a manipulator can conveniently take out a machined part in a certain time. Then the high-protection oil cylinder 15 drives the hydraulic swing rod 12 to rotate anticlockwise, the ejector rod 9 falls down, and the reset action is completed.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (8)
1. A lower ejection mechanism comprising:
A body (1);
the cam (2) rotates synchronously with the gear shaft (3);
The transmission rod (4) is driven by the cam (2) and is provided with a fixed part and a movable part, and the movable part swings reciprocally around the fixed part under the drive of the cam (2);
one end of the pull rod (5) is rotationally connected with the movable part;
One end of the ejection assembly is rotationally connected with the other end of the pull rod (5), the ejection action is carried out under the drive of the pull rod (5) to eject a workpiece, the other end of the ejection assembly is connected with the reset device, and the reset device is driven to carry out the reset action opposite to the ejection action so as to drive the pull rod (5) and the transmission rod (4) to reset;
the device is characterized by further comprising a buffer device arranged on the pull rod (5), wherein the buffer device applies buffer force to the pull rod (5) in the opposite direction to the movement direction of the pull rod (5);
the ejection assembly includes:
A lower ejection shaft (8);
a rotating part capable of reciprocally rotating around the lower ejection shaft (8), one end of which is connected with the other end of the pull rod (5);
A push rod (9) which is arranged at the upper part of the other end of the rotating part and can reciprocate and is used for ejecting a workpiece;
The rotating part includes:
One end of the lower swing rod (10) is connected with the other end of the pull rod (5) and can drive the lower ejection shaft (8) to rotate under the drive of the pull rod (5);
The swing rod supporting arm (11) is arranged side by side with the lower swing rod (10) and synchronously rotates with the lower ejection shaft (8), and the swing rod supporting arm (11) is connected with the lower ejection shaft (8) by a key;
The hydraulic swing rod (12) is sleeved on the lower ejection shaft (8), the top end of the hydraulic swing rod (12) is in contact with the ejector rod (9), and the hydraulic swing rod (12) can rotate positively around the lower ejection shaft (8) under the drive of the swing rod bracket arm (11) to drive the ejector rod (9) to move upwards;
The high-protection oil cylinder (15), one end of the high-protection oil cylinder (15) is fixed, the other end of the high-protection oil cylinder is connected with the other end of the hydraulic swing rod (12) which is contacted with the ejector rod (9), and when the lower ejection shaft (8) rotates negatively, the high-protection oil cylinder (15) can enable the hydraulic swing rod (12) to stay at the original position for a specific time.
2. Lower ejection mechanism according to claim 1, characterized in that the damping means is a spring assembly (6), the spring assembly (6) exerting a resilient damping force on the pull rod (5) opposite to the direction of movement of the pull rod (5).
3. The lower ejection mechanism according to claim 2, wherein the spring assembly (6) is sleeved on the spring assembly (6) outside the pull rod (5), one end of the spring assembly (6) is fixed to the machine body (1), and the other end of the spring assembly is fixed to the pull rod (5).
4. The lower ejection mechanism according to claim 2, wherein the spring assembly (6) is disposed between the rods of the tie rod (5) to separate the rods into upper and lower rods independent of each other, the spring assembly (6) being connected to the upper and lower rods, respectively.
5. The lower ejection mechanism according to claim 1, wherein the buffer means is a rubber block arranged between the rod bodies of the pull rod (5) to separate the rod bodies into an upper rod body and a lower rod body which are independent of each other, and the rubber block is fixedly connected with the upper rod body and the lower rod body respectively.
6. The lower ejection mechanism according to any one of claims 1 to 5, wherein the transmission rod (4) is an L-shaped swing rod and comprises a vertical arm (41) and a cross arm (42) which are connected, the free end of the vertical arm (41) is always abutted against the cam (2), the free end of the cross arm (42) is the fixing part rotatably fixed on the machine body (1) through a pin shaft (43), and the connecting part of the vertical arm (41) and the cross arm (42) is movably connected with one end of the pull rod (5).
7. Lower ejection mechanism according to claim 6, characterized in that the free end of the vertical arm (41) always abutting against the cam (2) is fitted with a roller (7), the roller (7) being in rolling contact with the outer edge of the cam (2).
8. The lower ejection mechanism of any one of claims 1 to 5, wherein the reset means comprises:
the reset cylinder (13) is fixedly arranged on the machine body (1) and provided with a reciprocating piston;
The reset swing rod (14) is driven by the piston and is arranged side by side with the hydraulic swing rod (12), and the reset swing rod (14) can enable the lower ejection shaft (8) to rotate in the negative direction opposite to the positive direction under the driving of the piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610694805.XA CN107755571B (en) | 2016-08-19 | 2016-08-19 | Lower ejection mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610694805.XA CN107755571B (en) | 2016-08-19 | 2016-08-19 | Lower ejection mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107755571A CN107755571A (en) | 2018-03-06 |
| CN107755571B true CN107755571B (en) | 2024-05-14 |
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| CN201610694805.XA Active CN107755571B (en) | 2016-08-19 | 2016-08-19 | Lower ejection mechanism |
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| CN107756840A (en) * | 2017-07-08 | 2018-03-06 | 嘉兴大道锻造技术咨询有限公司 | A kind of forcing press for using hydraulic motor as driving force |
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|---|---|---|---|---|
| EP0330914A1 (en) * | 1988-02-27 | 1989-09-06 | L. SCHULER GmbH | Device for ejecting work pieces from dies in a forming press |
| JPH0871682A (en) * | 1994-09-12 | 1996-03-19 | Aida Eng Ltd | Bed knock-out device of forging press |
| JPH0890134A (en) * | 1994-09-27 | 1996-04-09 | Aida Eng Ltd | Bed knock-out device in forging press |
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| CN101329238A (en) * | 2007-06-20 | 2008-12-24 | 河南科技大学 | Load charger applied to friction test machine |
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| JPH09285830A (en) * | 1996-04-22 | 1997-11-04 | Aida Eng Ltd | Device for holding pin in lower knock-out device of mechanical press |
| JP2002102992A (en) * | 2000-09-29 | 2002-04-09 | Kurimoto Ltd | Lower knock out device |
| JP2003251430A (en) * | 2002-03-05 | 2003-09-09 | Sumitomo Heavy Ind Ltd | Knockout device in forging press |
| JP2004283901A (en) * | 2003-03-25 | 2004-10-14 | Sumitomo Heavy Industries Techno-Fort Co Ltd | Molding condition monitoring device in forging press |
| CN101329238A (en) * | 2007-06-20 | 2008-12-24 | 河南科技大学 | Load charger applied to friction test machine |
| CN201098784Y (en) * | 2007-07-24 | 2008-08-13 | 山东鲁南包装有限公司 | Aluminum cover automatic edge knurling machine |
| CN201198023Y (en) * | 2008-05-12 | 2009-02-25 | 陈建德 | Back support apparatus of feeding machine |
| CN202701262U (en) * | 2012-07-02 | 2013-01-30 | 东风锻造有限公司 | Material ejecting mechanism of pneumatic forging machine |
| CN103100633A (en) * | 2013-02-01 | 2013-05-15 | 中山市胜龙锻压机械有限公司 | Press cam lever liftout mechanism |
| CN103206504A (en) * | 2013-03-21 | 2013-07-17 | 佛山华工祥源环保包装有限公司 | Buffered sheave driving mechanism |
| CN203438794U (en) * | 2013-08-15 | 2014-02-19 | 十堰隆昌汽车零部件有限公司 | Composite buffer type thrust rod mechanism |
| CN103438144A (en) * | 2013-09-12 | 2013-12-11 | 上海海弋机电科技有限公司 | Transmission mechanism for bimetal composite contact cold heading machine |
| CN204687414U (en) * | 2015-04-09 | 2015-10-07 | 宁波念初机械工业有限公司 | A kind of mechanical type multi link bottom material jacking mechanism of forcing press |
| CN205926905U (en) * | 2016-08-19 | 2017-02-08 | 北京机电研究所 | Lower ejection mechanism |
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