CN116638808A

CN116638808A - Screw pressure mechanism and screw pressure device

Info

Publication number: CN116638808A
Application number: CN202310688619.5A
Authority: CN
Inventors: 文贤善; 王佳豪
Original assignee: Shenzhen Hongxun Manufacturing Technology Co ltd
Current assignee: Shenzhen Hongxun Manufacturing Technology Co ltd
Priority date: 2023-06-09
Filing date: 2023-06-09
Publication date: 2023-08-25

Abstract

The invention provides a screw pressure mechanism and a screw pressure device, wherein the screw pressure mechanism comprises: a first-stage screw, a push rod and a power mechanism; the first screw is provided with a first screw hole; the ejector rod is in threaded fit with the primary screw hole; the power mechanism comprises a flywheel and a clutch, the clutch can be selectively connected with the primary screw rod or the ejector rod, when the clutch is connected with the primary screw rod, the rotating force of the flywheel is transmitted to the primary screw rod, the ejector rod is enabled to move along the pressing direction by the aid of the threaded engagement force between the primary screw rod and the ejector rod, when the clutch is connected with the ejector rod, the rotating force of the flywheel is transmitted to the ejector rod, and the ejector rod is enabled to move along the direction opposite to the pressing direction by the aid of the threaded engagement force between the ejector rod and the primary screw rod. When the ejector rod reciprocates to realize stamping operation, the flywheel keeps rotating in the same direction, so that the low-power motor can realize high-power output by uninterrupted energy storage.

Description

Screw pressure mechanism and screw pressure device

Technical Field

The invention relates to the technical field of stamping equipment, in particular to a spiral pressure mechanism and a spiral pressure device.

Background

The screw pressure device is a novel pressure device, is mainly used for forging and stamping, and drives a screw to rotate through positive and negative rotation of a motor, and the screw converts rotation motion of the screw into linear motion through a screw structure, so that stamping and return are realized.

However, each time the motor turns, the large momentum device such as a flywheel needs to be braked, decelerated, stopped and reversely started and accelerated, and the repeated turning of the motor causes the high energy consumption of the spiral pressure device, large part wear, long time consumption, slow processing beat and low resource utilization efficiency.

Disclosure of Invention

The invention aims to provide a screw pressure mechanism and a screw pressure device, which are used for solving the technical problems of high energy consumption, high part abrasion, long time consumption, slow processing beat and low resource utilization efficiency of the screw pressure device caused by repeated steering of a motor in the prior art.

In order to achieve the above purpose, the invention adopts the following technical scheme:

in a first aspect, there is provided a screw press mechanism comprising:

a first-stage screw, a push rod and a power mechanism;

the primary screw is provided with a primary screw hole extending in the pressing direction; the ejector rod is inserted into the primary screw hole and is in threaded fit with the primary screw hole; the power mechanism comprises a flywheel and a clutch arranged on the flywheel, the clutch can be selectively connected with the primary screw rod or the ejector rod, when the clutch is connected with the primary screw rod, the rotating force of the flywheel is transmitted to the primary screw rod, the ejector rod is enabled to move along the pressing direction by the aid of the threaded engagement force between the primary screw rod and the ejector rod, when the clutch is connected with the ejector rod, the rotating force of the flywheel is transmitted to the ejector rod, and the ejector rod is enabled to move along the opposite direction of the pressing direction by the aid of the threaded engagement force between the ejector rod and the primary screw rod.

By adopting the technical scheme, the embodiment has the following advantages:

1. when the ejector rod reciprocates to realize stamping operation, the flywheel can continuously keep rotating in the same direction, so that the high-power output of the ejector rod can be realized by uninterrupted energy storage of the low-power motor;

2. the clutch time of the clutch is controlled, so that the ejector rod can be processed in any stroke, and the processing frequency is improved.

3. The embodiment can realize multi-stage screw rod matching (without three stages, four stages, five stages and the like), reduce the occupation of axial space, reduce the waste of idle stroke time and improve the output of working stroke.

In one embodiment, the clutch is movable along an axial direction of the flywheel to selectively connect with the primary screw or the ejector rod.

In one embodiment, the screw pressure mechanism further comprises a secondary screw, a first stop, and a first brake;

the primary screw is provided with a primary screw hole extending in the pressing direction, and the hole wall of the primary screw hole is provided with a first thread; the secondary screw is inserted into the primary screw hole, a second thread meshed with the first thread is arranged on the peripheral side wall of the secondary screw, a secondary screw hole extending in the pressing direction is formed in the secondary screw, and a third thread is formed on the hole wall of the secondary screw hole; the ejector rod is inserted into the secondary screw hole, and a fourth thread meshed with the third thread is arranged on the peripheral side wall of the ejector rod; the first limiting device is used for limiting the ejector rod to move along the pressing direction, the first braking piece is used for braking the secondary screw rod to move along the pressing direction, and the first braking piece is positioned at the tail end of the primary screw rod in the pressing direction;

when the first braking piece does not brake the secondary screw, the primary screw rotates relative to the secondary screw, so that the first thread and the second thread are matched to drive the secondary screw and the ejector rod to synchronously move along the pressing direction; when the first braking piece brakes the secondary screw rod, the primary screw rod and the secondary screw rod synchronously rotate, so that the third thread and the fourth thread are matched to drive the ejector rod to move along the pressing direction; and the thread spacing between the first thread and the second thread is larger than the thread spacing between the third thread and the fourth thread.

By adopting the technical scheme, the spiral pressure mechanism is high in moving speed during idle stroke, the pressure applying efficiency is improved, meanwhile, the pressure applying ratio during the pressure applying stroke is high, and the pressure applying effect is ensured, so that the spiral pressure mechanism of the embodiment simultaneously gives consideration to the pressure applying efficiency and the pressure applying ratio.

In one embodiment, the first braking member is formed with a first braking protrusion capable of abutting against the secondary screw to brake the movement of the secondary screw in the pressing direction, and the first braking protrusion encloses a first braking hole from which the ejector pin protrudes.

By adopting the technical scheme, the continuous movement of the ejector rod is kept after the limited movement of the secondary screw rod.

In one embodiment, the screw pressure mechanism further comprises a second braking member, the second braking member is a second braking protrusion formed on the outer circumferential side wall of the ejector rod, the second braking protrusion is located at the end of the fourth thread in the pressing direction, and the second braking protrusion can abut against the secondary screw rod so that the secondary screw rod drives the ejector rod to synchronously move along the pressing direction.

By adopting the technical scheme, the possibility of relative rotation of the secondary screw and the ejector rod in the idle stroke is reduced, and the moving efficiency of the secondary screw in the idle stroke along the pressing direction is ensured.

In a second aspect, a screw pressure device is provided, including a housing, a power mechanism, and the screw pressure mechanism described above;

the shell is provided with a machine cabin, and a power hole and a punching hole which are communicated with the machine cabin;

the power mechanism comprises a power piece arranged on the shell, a power output shaft arranged on the power piece and extending into the cabin, and a flywheel connected with the power output shaft and positioned in the cabin;

the spiral pressure mechanism is accommodated in the cabin, and the flywheel can be connected with the primary screw rod, so that the flywheel can drive the primary screw rod to rotate, and the ejector rod is driven to extend out of the punching hole.

By adopting the technical scheme, on the basis of the advantages of the spiral pressure mechanism, the spiral pressure device of the embodiment also has the advantages of high pressure application efficiency and large pressure ratio of pressure application.

In one embodiment, a clutch is further arranged on the flywheel, and the clutch can move along the pressing direction and a return direction opposite to the pressing direction, so that the flywheel is engaged with or separated from the primary screw rod, and when the clutch moves along the pressing direction and is engaged with the primary screw rod, the rotating power of the flywheel is transmitted to the primary screw rod, so that the ejector rod is driven to move along the pressing direction; when the clutch moves in the return direction and is separated from the primary screw, the clutch cuts off the power transmission between the flywheel and the primary screw.

By adopting the technical scheme, the power mechanism is connected with the spiral pressure mechanism in a clutch mode, so that the power transmission of the power mechanism is conveniently switched on and off, and the spiral pressure mechanism is facilitated to switch the motion state.

In one embodiment, the first stopper is detachably connected to the ejector rod, and the first stopper restricts the ejector rod from moving in the pressing direction when the clutch moves in the pressing direction and engages with the primary screw; when the clutch moves along the return direction and is separated from the primary screw, the first limiter is separated from the ejector rod.

Through adopting above-mentioned technical scheme, first stopper can be with ejector pin separable connection, the ejector pin can realize under the different states of first stopper that the second grade screw rod is driven down and is moved along the direction of exerting pressure and exert pressure or rotate and return relative second grade screw rod promptly.

In one embodiment, the ejector rod is further provided with a sliding sleeve for driving the ejector rod to rotate, the clutch can move along the return direction and the pressing direction, so that the flywheel is engaged with or separated from the sliding sleeve, when the clutch moves along the return direction and is engaged with the sliding sleeve, the rotating power of the flywheel is transmitted to the sliding sleeve, and the sliding sleeve can drive the ejector rod to rotate relative to the secondary screw rod, so that the ejector rod is driven to move along the return direction; when the clutch moves in the pressing direction and is separated from the sliding sleeve, the power transmission between the flywheel and the sliding sleeve is cut off.

By adopting the technical scheme, the power piece is consistent in the rotation direction of the idle stroke, the pressing stroke and the first return stroke, so that the energy consumption, the part abrasion and the processing time are reduced, and the processing beat and the resource utilization efficiency are improved.

In one embodiment, the screw pressure mechanism further comprises a third braking member, the third braking member is located at the tail end of the primary screw rod in the return direction, a third braking protrusion is formed on the third braking member, the third braking protrusion can be abutted with the secondary screw rod to brake the secondary screw rod to move along the return direction, and a third braking hole for the ejector rod to extend out is formed by encircling the third braking protrusion.

By adopting the technical scheme, smooth switching of the ejector rod between the return stroke and the idle stroke is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view of a screw press mechanism according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view I of a screw press mechanism provided by an embodiment of the present invention;

FIG. 3 is a second cross-sectional view of the screw press mechanism provided by the embodiment of the present invention;

FIG. 4 is a perspective view of a primary screw provided by an embodiment of the present invention;

FIG. 5 is a perspective view of a secondary screw provided by an embodiment of the present invention;

FIG. 6 is a perspective view of a carrier rod according to an embodiment of the present invention;

fig. 7 is a perspective view of a first stopper according to an embodiment of the present invention;

FIG. 8 is a third cross-sectional view of a screw pressure mechanism provided by an embodiment of the present invention;

FIG. 9 is a cross-sectional view of a screw press mechanism provided by an embodiment of the present invention;

FIG. 10 is a fifth cross-sectional view of the screw press mechanism provided by the embodiment of the present invention;

FIG. 11 is a cross-sectional view of a screw press mechanism according to an embodiment of the present invention;

FIG. 12 is a cross-sectional view seven of a screw pressure mechanism provided by an embodiment of the present invention;

fig. 13 is a perspective view of a second stopper according to an embodiment of the present invention.

The reference numerals in the drawings are as follows:

10. a screw pressure mechanism; 20. a power mechanism; 30. a housing;

1. a first-stage screw; 2. a secondary screw; 3. a push rod; 4. a first stopper; 5. a first braking member; 6. a second brake member; 7. a power member; 8. a second stopper; 9. a third brake member;

11. a first-stage screw hole; 12. a first thread; 13. the second limit groove; 21. a second thread; 22. a secondary screw hole; 23. a third thread; 31. a fourth thread; 32. a first limit groove; 33. a sliding sleeve; 41. the first limiting seat; 42. a first limiting block; 43. the first limiting teeth; 51. a first brake projection; 52. a first braking hole; 61. a second brake projection; 71. a power output shaft; 72. a flywheel; 73. a clutch; 81. the second limiting seat; 82. a second limiting block; 83. the second limiting teeth;

301. a machine cabin; 302. a power hole; 303. punching the hole.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected or indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing the invention based on the orientation or positional relationship shown in the drawings, and are not to be construed as limiting the invention, as the indicating device or element must have a particular orientation, be constructed and operated in a particular orientation.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating relative importance or indicating the number of technical features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. The following describes in more detail the specific implementation of the present invention in connection with specific embodiments:

as shown in fig. 1 to 3, a screw press mechanism 10 is provided according to an embodiment of the present invention, and is configured to apply pressure on a workpiece under the driving of a power mechanism 20; specifically, the spiral pressure mechanism 10 drives the ejector rod to move through a spiral structure, so that the ejector rod 3 has stamping potential energy and is finally applied to a workpiece; the screw press mechanism 10 of the present embodiment has advantages of a large pressure ratio and high punching efficiency; the following description is made by way of specific embodiments:

the screw pressure mechanism 10 of the present embodiment includes: the device comprises a primary screw 1, a push rod 3 and a power mechanism 20;

the primary screw 1 is provided with a primary screw hole 11 extending in the pressing direction; the ejector rod 3 is inserted into the primary screw hole 11 and is in threaded fit with the primary screw hole 11; the power mechanism 20 includes a flywheel 72 and a clutch 73 provided on the flywheel 72, the clutch 73 being selectively connectable to the primary screw 1 or the jack 3, optionally the clutch 73 being movable in an axial direction of the flywheel 72 to be selectively connectable to the primary screw 1 or the jack 3, when the clutch 73 is connected to the primary screw 1, a rotational force of the flywheel 72 is transmitted to the primary screw 1, a thread engagement force between the primary screw 1 and the jack 3 causes the jack 3 to be moved in a pressing direction, and when the clutch 73 is connected to the jack 3, a rotational force of the flywheel 72 is transmitted to the jack 3, and a thread engagement force between the jack 3 and the primary screw 1 causes the jack 3 to be moved in a direction opposite to the pressing direction.

By adopting the technical scheme, the embodiment has the following advantages:

In one embodiment, the screw press mechanism 10 of the present embodiment further includes: the secondary screw 2, the first limiter 4 and the first brake 5;

referring to fig. 4, a primary screw 1 is provided with a primary screw hole 11 extending in a pressing direction X, and a first thread 12 is formed on a hole wall of the primary screw hole 11; here, the primary screw 1 is used to be connected with a power mechanism 20, and the power mechanism 20 is capable of transmitting power to the primary screw 1 so that the primary screw 1 rotates around a shaft; the primary screw 1 is provided with a primary screw hole 11 for accommodating the secondary screw 2, and the hole wall of the primary screw hole 11 is provided with a first thread 12 which is used for being matched with a second thread 21 on the secondary screw 2, so that the secondary screw 2 can move relative to the primary screw 1 under the matching of the second thread 21 and the first thread 12;

referring to fig. 5, a secondary screw 2 is inserted into the primary screw hole 11, a second screw thread 21 meshed with the first screw thread 12 is provided on the outer peripheral side wall of the secondary screw 2, a secondary screw hole 22 extending in the pressing direction X is provided on the secondary screw 2, and a third screw thread 23 is formed on the wall of the secondary screw hole 22; here, the secondary screw 2 is for being driven by the primary screw 1 to move in the pressing direction X; specifically, the secondary screw 2 is inserted into the primary screw hole 11 to realize threaded engagement with the primary screw 1, the outer peripheral side wall of the secondary screw 2 is provided with a second thread 21, the second thread 21 is used for being meshed with the first thread 12, and the extending directions of the first thread 12 and the second thread 21 are parallel to the pressing direction X, so that when the primary screw 1 is driven by the power mechanism 20 to rotate around the shaft, and the secondary screw 2 is limited to move only along the pressing direction X, the engagement of the first thread 12 and the second thread 21 can enable the secondary screw 2 to move relative to the primary screw 1 along the pressing direction X; the secondary screw rod 2 is provided with a secondary screw hole 22, and a third thread 23 is formed on the hole wall of the secondary screw hole 22 and is used for being matched with a fourth thread 31 on the ejector rod 3, so that the ejector rod 3 can move relative to the secondary screw rod 2 under the matching of the third thread 23 and the fourth thread 31;

referring to fig. 6, the ejector rod 3 is inserted into the secondary screw hole 22, and a fourth thread 31 engaged with the third thread 23 is provided on the outer peripheral sidewall of the ejector rod 3; here, the jack 3 is for abutting against the workpiece and applying pressure in the pressing direction X; specifically, the ejector rod 3 is inserted into the secondary screw hole 22 to realize threaded fit of the secondary screw rod 2; specifically, the peripheral side wall of the ejector rod 3 is provided with a fourth thread 31, the fourth thread 31 is used for being meshed with the third thread 23, and the extending directions of the third thread 23 and the fourth thread 31 are parallel to the pressing direction X, so that when the secondary screw rod 2 is driven to rotate around the shaft by the primary screw rod 1 and the ejector rod 3 is limited to move only along the pressing direction X, the cooperation of the third thread 23 and the fourth thread 31 can enable the ejector rod 3 to move along the pressing direction X relative to the secondary screw rod 2; it should be further explained that the front end of the ejector rod 3 in the pressing direction X may be used to abut against the workpiece, or a punch may be provided at the front end to accommodate different workpieces;

referring to fig. 7, the first limiter 4 is configured to limit the movement of the ejector rod 3 along the pressing direction X; here, the first stopper 4 includes, but is not limited to, a chuck structure, that is, the first stopper 4 is capable of catching the jack 3 such that the jack 3 can only move in the pressing direction X, which is the axial direction of the jack 3 in the present embodiment, but cannot rotate around the shaft;

the first braking piece 5 is used for braking the movement of the secondary screw 2 along the pressing direction X, and the first braking piece 5 is positioned at the tail end of the primary screw 1 along the pressing direction X; here, the first stopper 5 is for abutting against the secondary screw 2 to restrict the secondary screw 2 from continuing to move in the pressing direction X.

When the first braking piece 5 does not brake the secondary screw 2, the primary screw 1 rotates relative to the secondary screw 2, so that the first thread 12 is matched with the second thread 21 to drive the secondary screw 2 and the ejector rod 3 to synchronously move along the pressing direction X; when the first braking piece 5 brakes the secondary screw 2, the primary screw 1 and the secondary screw 2 synchronously rotate, so that the third thread 23 and the fourth thread 31 are matched to drive the ejector rod 3 to move along the pressing direction X; wherein the thread pitch of the first thread 12 and the second thread 21 is larger than the thread pitch of the third thread 23 and the fourth thread 31.

The working principle of the screw pressure mechanism 10 provided in this embodiment is as follows:

the operation of the screw press mechanism 10 includes a idle stroke and a pressing stroke;

as shown in fig. 1, the idle stroke is between the initial position of the secondary screw 2 and the ejector rod 3 in the pressing direction X and the position where the secondary screw 2 abuts against the first brake 5; during the period, the power mechanism 20 drives the primary screw 1 to rotate around the shaft, the acting force generated by the cooperation of the first thread 12 and the second thread 21 enables the secondary screw 2 to move along the pressing direction X, and the moving speed of the secondary screw 2 and the ejector rod 3 is high and the moving inertia is small because the thread interval between the first thread 12 and the second thread 21 is large; it should be further explained that, since the thread pitch of the third thread 23 and the fourth thread 31 is smaller than the thread pitch of the first thread 12 and the second thread 21, the second thread drives the ejector rod 3 to move together in the pressing direction X under the restriction of the first stopper 4 before the second screw rod 2 moves to the first stopper 5;

as shown in fig. 8 and 9, the pressing stroke is between the position where the ejector rod 3 abuts against the first braking member 5 and the position where the ejector rod 3 abuts against the workpiece; during this period, the power mechanism 20 drives the primary screw 1 to rotate, and the secondary screw 2 is abutted with the first braking piece 5 so that the secondary screw 2 cannot move continuously in the pressing direction X, and the secondary screw 2 can only rotate around the shaft under the drive of the primary screw 1, so that the ejector rod 3 continues to move along the pressing direction X due to the acting force generated by the cooperation of the third thread 23 and the fourth thread 31, and the ejector rod 3 moves slowly due to the large thread spacing between the third thread 23 and the fourth thread 31, but has large moment of inertia and large applied pressure ratio.

By adopting the technical scheme, the spiral pressure mechanism 10 moves fast in the idle stroke, so that the pressure application efficiency is improved, and meanwhile, the pressure application ratio in the pressure application stroke is large, and the pressure application effect is ensured, so that the spiral pressure mechanism 10 of the embodiment simultaneously gives consideration to the pressure application efficiency and the pressure application ratio.

In one embodiment, referring to fig. 8 again, the first braking member 5 is formed with a first braking protrusion 51, the first braking protrusion 51 can abut against the secondary screw 2 to brake the pressing direction X of the secondary screw 2, and the first braking protrusion 51 encloses a first braking hole 52 through which the ejector rod 3 extends.

Here, the first braking protrusion 51 protrudes toward the center of the primary screw hole 11 in the radial direction of the primary screw hole 11 by a length approximately equal to the thickness of the secondary screw 2, so that the first braking protrusion 51 can just block the continued movement of the secondary screw 2 in the pressing direction X; in addition, since the ejector pin 3 is inserted into the secondary screw 2, in order that the ejector pin 3 can continue to move in the pressing direction X when the secondary screw 2 is blocked by the first braking protrusion 51, the first braking protrusion 51 encloses to form the first braking hole 52, so that the ejector pin 3 can extend out of the first braking hole 52 to continue to move in the pressing direction X.

Alternatively, the first stop 5 may be a modulating collar, i.e. the position of the first stop 5 on the primary screw 1 is adjustable, thus changing the distance of the idle stroke.

By adopting the technical scheme, the continuous movement of the ejector rod 3 is kept after the limited movement of the secondary screw rod 2.

In one embodiment, the screw pressure mechanism 10 further includes a second stopper 6, the second stopper 6 being a second stopper protrusion 61 formed on the outer circumferential side wall of the jack 3, the second stopper protrusion 61 being located at the end of the fourth screw 31 in the pressing direction X, the second stopper protrusion 61 being capable of abutting against the secondary screw 2 to cause the secondary screw 2 to bring the jack 3 into synchronous movement in the pressing direction X.

Here, in the idle stroke, the secondary screw 2 and the ejector pin 3 are kept relatively fixed by the thread force between the third thread 23 and the fourth thread 31, that is, the secondary screw 2 and the ejector pin 3 are synchronously moved in the pressing direction X in the idle stroke, but this is to be achieved when the thread pitch difference between the first thread 12 and the second thread 21 and the third thread 23 and the fourth thread 31 is large, and therefore, in the actual use, the secondary screw 2 and the ejector pin 3 may be relatively rotated in the idle stroke, in order to ensure that the secondary screw 2 can synchronously move the ejector pin 3 in the idle stroke, the second braking protrusion 61 is formed on the peripheral side wall of the finalize, and when the secondary screw 2 is rotated relative to the ejector pin 3 and abuts against the second braking protrusion 61, the secondary screw 2 stops rotating relative to the ejector pin 3, and simultaneously drives the ejector pin 3 to synchronously move in the pressing direction X under the thread force of the primary screw 1.

By adopting the technical scheme, the possibility of relative rotation of the secondary screw rod 2 and the ejector rod 3 in the idle stroke is reduced, and the moving efficiency of the secondary screw rod 2 in the idle stroke along the pressing direction X is ensured.

In a second aspect, referring again to fig. 1-3, a screw press device is provided, comprising a housing 30, a power mechanism 20 and the screw press mechanism 10 described above;

the shell 30 is provided with a machine cabin 301, a power hole 302 and a punching hole 303 which are communicated with the machine cabin 301; here, the housing 30 is for fixing the power mechanism 20 and accommodating the screw pressure mechanism 10; specifically, an organic bin 301 is formed inside the housing 30, and both ends of the housing 30 are respectively formed with a power hole 302 and a punching hole 303, alternatively, the power hole 302 and the punching hole 303 are located on opposite ends of the housing 30;

the power mechanism 20 comprises a power piece 7 arranged on the shell 30, a power output shaft 71 arranged on the power piece 7 and extending into the machine cabin 301, and a flywheel 72 connected with the power output shaft 71 and positioned inside the machine cabin 301; here, the power mechanism 20 is for supplying rotational power to the primary screw 1 or the jack 3; the power mechanism 20 includes a power element 7, a power output shaft 71, and a flywheel 72; wherein the power piece 7 comprises, but is not limited to, a motor, a power output shaft 71 is used for outputting the power of the power piece 7, and a flywheel 72 is used for connecting the power output shaft 71 and the primary screw 1 or the ejector rod 3;

the screw pressure mechanism 10 is accommodated in the machine cabin 301, and the flywheel 72 can be connected with the primary screw 1, so that the flywheel 72 can drive the primary screw 1 to rotate, and further drive the ejector rod 3 to extend out of the punching hole 303.

The working principle of the screw pressure device provided in this embodiment is as follows:

the power output shaft 71 of the power piece 7 drives the flywheel 72 to rotate, the flywheel 72 drives the primary screw 1 to rotate and drives the ejector rod 3 to move, and the ejector rod 3 moves along the pressing direction X under the limitation of the first limiter 4.

By adopting the above technical scheme, on the basis of having the advantages of the screw pressure mechanism 10, the screw pressure device of the embodiment also has the advantages of fast pressure application efficiency and large pressure ratio of pressure application.

In one embodiment, referring to fig. 9 and 10 together, the flywheel 72 is further provided with a clutch 73, the clutch 73 can move along a pressing direction X and a return direction Y opposite to the pressing direction X, so that the flywheel 72 is engaged with or disengaged from the primary screw 1, and when the clutch 73 moves along the pressing direction X and is engaged with the primary screw 1, the rotation power of the flywheel 72 is transmitted to the primary screw 1, so as to drive the ejector rod 3 to move along the pressing direction X; when the clutch 73 moves in the return direction Y and is separated from the primary screw 1, the clutch 73 cuts off the power transmission between the flywheel 72 and the primary screw 1.

Here, the clutch 73 is used to engage or disengage the flywheel 72 and the primary screw 1, the clutch 73 including but not limited to an electromagnetically driven clutch 73, the clutch 73 being movable on the flywheel 72 in an electromagnetically driven manner to engage with the primary screw 1 or disengage from the primary screw 1; specifically, the clutch 73 can move along the pressing direction X until being engaged with the primary screw 1, at this time, the clutch 73 and the primary screw 1 are in contact with each other in a key-slot manner, so that the rotation power of the flywheel 72 can be transmitted to the primary screw 1 through the clutch 73, that is, at this time, the flywheel 72 drives the primary screw 1 to rotate; when the clutch 73 moves in the return direction Y and is separated from the primary screw 1, the clutch 73 switches the power transmission between the flywheel 72 and the primary screw 1, at which time the primary screw 1 stops rotating.

By adopting the technical scheme, the power mechanism 20 is connected with the spiral pressure mechanism 10 in a clutch mode, so that the power transmission of the power mechanism 20 is conveniently switched on and off, and the spiral pressure mechanism 10 is facilitated to switch the motion state.

In one embodiment, referring to fig. 6 and 7 together, the first stopper 4 is detachably connected to the ejector rod 3, and the first stopper 4 restricts the ejector rod 3 from moving in the pressing direction X when the clutch 73 moves in the pressing direction X and engages with the primary screw 1; when the clutch 73 moves in the return direction Y and is separated from the primary screw 1, the first stopper 4 is separated from the jack 3.

Here, the first stopper 4 serves to define the moving direction of the jack 3;

specifically, the first limiter 4 comprises a first limiting seat 41, a first limiting block 42 arranged on the first limiting seat 41 and a first limiting tooth 43 arranged on the first limiting block 42, a first limiting groove 32 is arranged on the peripheral side wall of the part of the ejector rod 3 matched with the first limiter 4, and the length direction of the first limiting groove 32 is parallel to the pressing direction X, so that when the first limiting tooth 43 is in sliding fit with the first limiting groove 32, the first limiting tooth 43 limits the ejector rod 3 to move only along the pressing direction X;

the first limiter 4 further comprises a first limiting driving member connected with the first limiting block 42 and used for driving the first limiting teeth 43 to be separated from or matched with the first limiting groove 32;

when the first limiting driving piece drives the first limiting teeth 43 to be matched with the first limiting grooves 32, the first limiter 4 limits the ejector rod 3 to move along the pressing direction X;

when the first limiting driving member drives the first limiting teeth 43 to separate from the first limiting groove 32, the first limiter 4 does not limit the ejector rod 3 any more, i.e. the ejector rod 3 rotates relative to the secondary screw 2, so that when the secondary screw 2 is fixed and the ejector rod 3 rotates relative to the secondary screw 2, the ejector rod 3 returns under the action of the thread force generated by the cooperation of the third thread 23 and the fourth thread 31, i.e. the ejector rod 3 moves along the return direction Y, and returns to the front end in the pressing direction X.

Through adopting above-mentioned technical scheme, first stopper 4 can be with ejector pin 3 separable connection, and ejector pin 3 can realize under the different states of first stopper 4 that the second grade screw rod 2 is driven to remove along exerting pressure direction X and exert pressure or rotate and return relative second grade screw rod 2.

In one embodiment, as shown in fig. 11 and 12, a sliding sleeve 33 for driving the ejector rod 3 to rotate is further provided on the ejector rod 3, the clutch 73 can move along the return direction Y and the pressing direction X, so that the flywheel 72 and the sliding sleeve 33 are engaged or disengaged, when the clutch 73 moves along the return direction Y and is engaged with the sliding sleeve 33, the rotation power of the flywheel 72 is transmitted to the sliding sleeve 33, and the sliding sleeve 33 can drive the ejector rod 3 to rotate relative to the secondary screw rod 2, so that the ejector rod 3 is driven to move along the return direction Y; when the clutch 73 moves in the pressing direction X and is separated from the slide bush 33, the power transmission between the flywheel 72 and the slide bush 33 is cut off.

Here, the sliding sleeve 33 and the ejector rod 3 are connected in a key and keyway manner, that is, the sliding sleeve 33 and the ejector rod 3 can only synchronously rotate and can only relatively move in the pressing direction X or the returning direction Y; when the clutch 73 moves along the return direction Y and is engaged with the sliding sleeve 33, the power transmission between the flywheel 72 and the primary screw 1 is cut off, the primary screw 1 stops rotating at this time, and the clutch 73 engages with the flywheel 72 and the sliding sleeve 33, namely, the rotating power of the flywheel 72 is transmitted to the sliding sleeve 33, so that the flywheel 72 drives the sliding sleeve 33 to rotate, the sliding sleeve 33 drives the ejector rod 3 to rotate, and the ejector rod 3 rotates relative to the secondary screw 2 because the secondary screw 2 is still fixed relative to the primary screw 1, thereby realizing the movement of the ejector rod 3 in the return direction Y, and the section is formed into a first return stroke; when the second braking piece 6 of the ejector rod 3 is abutted with the secondary screw rod 2, the second braking piece 6 can drive the secondary screw rod 2 and the ejector rod 3 to synchronously rotate relative to the primary screw rod 1, so that synchronous return of the ejector rod 3 and the secondary screw rod 2 is realized, namely, the ejector rod 3 and the secondary screw rod 2 synchronously move along the return direction Y, and the stroke is a second return stroke.

It should be further explained that the power output directions of the power piece 7 in the idle stroke, the pressing stroke, the first return stroke and the second return stroke are consistent, that is, the rotation directions of the flywheel 72 are consistent all the time, and the return of the ejector rod 3 and the secondary screw 2 is realized through the cooperation of the clutch 73, the sliding sleeve 33 and the first limiter 4; in the conventional screw press device, the power member 7 needs to repeatedly change the power output direction, so that the rotation direction of the flywheel 72 is repeatedly adjusted to realize the pressing and returning of the ejector rod 3; each time of steering change, the large momentum devices such as the flywheel 72 are required to be braked, decelerated and stopped, and then the flywheel is reversely started and accelerated, so that the process is high in energy consumption, large in part abrasion, more in time consumption, slow in processing beat and low in resource utilization efficiency.

Through adopting above-mentioned technical scheme, power piece 7 is unanimous at idle stroke, pressure stroke and the rotation direction of first return stroke, has reduced power consumption, part wearing and tearing, process time, has promoted processing beat and resource utilization efficiency.

In one embodiment, referring to fig. 12 and 13 together, the screw press mechanism 10 further includes a second limiter 8, the second limiter 8 being configured to limit rotation of the primary screw 1 when the clutch 73 moves in the return direction Y and engages with the sliding sleeve 33.

Specifically, the second limiter 8 comprises a second limiting seat 81, a second limiting block 82 arranged on the second limiting seat 81 and second limiting teeth 83 arranged on the second limiting block 82, a second limiting groove 13 is formed in the peripheral side wall of the portion, matched with the second limiter 8, of the primary screw 1, the length direction of the second limiting groove 13 is parallel to the pressing direction X, and therefore when the second limiting teeth 83 are meshed with the second limiting groove 13, the second limiting teeth 83 limit the primary screw 1 to stop rotating;

the second limiter 8 further comprises a first limiting driving member connected with the second limiting block 82 and used for driving the second limiting teeth 83 to separate from or engage with the second limiting groove 13;

when the second limiting driving piece drives the second limiting teeth 83 to engage with the second limiting grooves 13, the second limiter 8 limits the ejector rod 3 to stop rotating; thus, when the primary screw 1 is fixed, the secondary screw 2 returns under the action of the screw force generated by the cooperation of the first screw thread 12 and the second screw thread 21, namely, the secondary screw 2 moves along the return direction Y, and the ejector rod 3 moves along the return direction Y synchronously with the secondary screw 2 to return to the front end in the pressing direction X;

when the second limiting driving member drives the second limiting teeth 83 to separate from the second limiting groove 13, the second limiter 8 does not limit the primary screw 1 any more, i.e. the primary screw 1 is driven by the flywheel 72 to rotate, which can drive the secondary screw 2 and the ejector rod 3 to move along the pressing direction X.

By adopting the technical scheme, the first-stage screw 1 is ensured to be limited to rotate by the second limiter 8, and the return of the second-stage screw 2 and the ejector rod 3 is realized.

In one embodiment, the screw pressure mechanism 10 further includes a third braking member 9, where the third braking member 9 is located at the end of the primary screw 1 in the return direction Y, and the third braking member 9 is formed with a third braking protrusion that can abut against the secondary screw 2 to brake the movement of the secondary screw 2 in the return direction Y, and the third braking protrusion encloses a third braking hole in which the ejector rod 3 protrudes.

Here, the third braking member 9 is used to position the secondary screw 2 and the jack 3 to the front end of the return stroke, that is, to return the secondary screw 2 and the jack 3 to the initial positions, which are the initial positions of the idle stroke and the pressing stroke; specifically, after the secondary screw 2 and the jack 3 move a certain distance in the second return stroke, the third braking member 9 is used to brake the secondary screw 2 to continue moving in the return direction Y, i.e., to stop the rotation of the secondary screw 2 and the jack 3 synchronously.

By adopting the technical scheme, the push rod 3 is ensured to be switched smoothly between the return stroke and the idle stroke.

In one embodiment, the clutch 73 is an electromagnetically driven clutch 73.

By adopting the above-described technical scheme, the clutch 73 is simple in control manner, and small in volume and easy to arrange inside the flywheel 72.

In one embodiment, the first stop 4 is a chuck feature stop and the second stop 8 is a chuck feature stop.

By adopting the technical scheme, the first limiter 4 and the second limiter 8 are simple in structure and high in reliability.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims

1. A screw press mechanism, comprising:

a first-stage screw, a push rod and a power mechanism;

2. The screw pressure mechanism of claim 1, wherein the clutch is movable along an axial direction of the flywheel to selectively connect with the primary screw or the ram.

3. The screw pressure mechanism of claim 2, further comprising a secondary screw, a first stop, and a first brake;

4. A screw pressure mechanism according to claim 3, wherein the first braking member is formed with a first braking protrusion capable of abutting against the secondary screw to brake the movement of the secondary screw in the pressing direction, the first braking protrusion surrounding a first braking hole from which the ejector pin protrudes.

5. The screw press mechanism according to claim 3, further comprising a second stopper which is a second stopper projection formed on an outer peripheral side wall of the ejector pin, the second stopper projection being located at an end of the fourth screw thread in the pressing direction, the second stopper projection being capable of abutting against the secondary screw so that the secondary screw moves the ejector pin in synchronization with the pressing direction.

6. A screw pressure device comprising a housing and the screw pressure mechanism of any one of claims 1 to 5;

the power mechanism comprises a power piece arranged on the shell, a power output shaft arranged on the power piece and extending into the cabin, and the flywheel connected with the power output shaft and positioned in the cabin;

7. The screw press device according to claim 6, wherein the clutch is further provided on the flywheel, and the clutch is movable in a pressing direction and a returning direction opposite to the pressing direction so that the flywheel is engaged with or disengaged from the primary screw, and when the clutch is moved in the pressing direction and engaged with the primary screw, rotational power of the flywheel is transmitted to the primary screw so as to drive the jack to move in the pressing direction; when the clutch moves in the return direction and is separated from the primary screw, the clutch cuts off the power transmission between the flywheel and the primary screw.

8. The screw pressure device of claim 7, wherein a first stop is detachably connected to the ram, the first stop limiting movement of the ram in the pressing direction when the clutch is moved in the pressing direction and engaged with the primary screw; when the clutch moves along the return direction and is separated from the primary screw, the first limiter is separated from the ejector rod.

9. The screw press device according to claim 7, wherein a slide sleeve for driving the ejector pin to rotate is further provided on the ejector pin, the clutch is movable in a return direction and a pressing direction so that the flywheel is engaged with or disengaged from the slide sleeve, when the clutch is moved in the return direction and engaged with the slide sleeve, a rotational power of the flywheel is transmitted to the slide sleeve, and the slide sleeve is capable of driving the ejector pin to rotate relative to the secondary screw, thereby driving the ejector pin to move in the return direction; when the clutch moves in the pressing direction and is separated from the sliding sleeve, the power transmission between the flywheel and the sliding sleeve is cut off.

10. The screw press according to claim 9, wherein the screw press mechanism further comprises a third stopper member located at an end of the primary screw in the return direction, the third stopper member being formed with a third stopper protrusion capable of abutting against the secondary screw to stopper the secondary screw to move in the return direction, the third stopper protrusion enclosing a third stopper hole from which the ejector pin protrudes.