CN109878127B

CN109878127B - Multi-hand-wheel manual press

Info

Publication number: CN109878127B
Application number: CN201910244289.4A
Authority: CN
Inventors: 徐鑫珍
Original assignee: Jiangsu Taoyou Metal Structure Co Ltd
Current assignee: Chongqing Sichuan Instrument Precision Machining Co.,Ltd.
Priority date: 2019-03-28
Filing date: 2019-03-28
Publication date: 2020-10-30
Anticipated expiration: 2039-03-28
Also published as: CN109878127A

Abstract

The invention relates in particular to a manual press. The purpose is to provide a multi-hand wheel manual press capable of improving the processing efficiency. The technical scheme adopted by the invention is as follows: a multi-hand-wheel manual press comprises a base and a pressing device, wherein the pressing device is arranged above the base through a support arm frame, and a workpiece fixing block is arranged on the base; the upper end of the mounting cylinder is also provided with an end cover, the end cover is sleeved outside the boss and the baffle disc, and the end cover is connected with the mounting cylinder through a bolt; a vertical connecting shaft is fixedly arranged in the center of the upper surface of the baffle disc, and the upper end of the connecting shaft is connected with a manual adjusting assembly; manual adjusting part is including fixing a plurality of hand wheels on the connecting axle in proper order from top to bottom, and is a plurality of the diameter of hand wheel is crescent from top to bottom. According to the invention, different hand wheels can be used for rotating the screw rod according to different stages, so that the efficiency is improved.

Description

Multi-hand-wheel manual press

Technical Field

The invention relates to the technical field of presses, in particular to a manual press.

Background

The press machine can be widely applied to the processes of cutting, punching, blanking, bending, riveting, forming and the like. The metal is processed into parts by applying a strong pressure to the metal blank to cause plastic deformation and fracture of the metal. The manual press is one of the presses, and it provides extrusion power through direct manual operation of staff, and it has advantages such as small, portable transport, installation flexibility ratio height, do not receive the installation place restriction. However, the existing manual press still has certain defects in the using process: 1. when the manual press works, a worker needs to install a workpiece on the base, but for a large workpiece, the workpiece can be assembled and disassembled only from the side face of the worker due to the fact that the pressure head above the workpiece can affect the assembly and disassembly of the workpiece, the workpiece cannot be assembled and disassembled from the upper portion of the base, and therefore the worker cannot conveniently observe, position and fix the workpiece, great inconvenience is caused, and machining efficiency is affected. In order to improve the convenience of loading and unloading the work piece, the way that usually adopts among the prior art is extension support arm for the pressure head can rise to promote higher height, and this kind of mode has risen operating space from a certain extent, but can lead to the holistic high increase of press, arouses the convenience of carrying, transport, installation, simultaneously because the invalid stroke increase that the pressure head pushed down, has also reduced machining efficiency. 2. In order to ensure stable sliding of the screw rod, the jacking column and the mounting cylinder, the conventional manual press needs a worker to manually inject lubricating oil between the screw rod and the jacking column and between the mounting cylinder and the jacking column by using a special tool for lubrication, but the mode is not only troublesome in operation and low in efficiency, but also has high requirement on the operation proficiency of the worker. 3. When the manual press is operated, the hand wheel needs to be operated repeatedly to control the pressing head to press down; in the front section and the middle section of the pressing, the pressing head does not need to be contacted with a workpiece, so that the hand wheel can be easily rotated, and the rotating speed of the hand wheel can be properly accelerated; in the rear stage of pressing, after the pressing head starts to press the workpiece, the force required for rotating the hand wheel is gradually increased. However, the existing manual press machine does not distinguish the situation, adopts a general hand wheel, has low efficiency before and during processing, and is easy to cause a laborious situation at the rear processing section.

Disclosure of Invention

The invention aims to provide a multi-hand wheel manual press capable of improving the processing efficiency.

In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: a multi-hand-wheel manual press comprises a base and a pressing device, wherein the pressing device is arranged above the base through a support arm frame, and a workpiece fixing block is arranged on the base;

the pressing device comprises a vertical mounting cylinder, the mounting cylinder is fixedly connected with the supporting arm, a central hole in the mounting cylinder is square, a square ejection column matched with the central hole is arranged in the central hole, and the ejection column is in sliding fit with the mounting cylinder; the lower end of the top column extends out of the mounting cylinder and is fixedly connected with the pressure head, a vertical first threaded hole is formed in the upper section of the top column, and the upper section of the top column is sleeved outside the screw rod through the first threaded hole and forms threaded fit with the screw rod; the upper end of the screw is also provided with a baffle disc and is placed on a boss at the top end of the mounting cylinder through the baffle disc; the upper end of the mounting cylinder is also provided with an end cover, the end cover is sleeved outside the boss and the baffle disc, and the end cover is connected with the mounting cylinder through a bolt; a vertical connecting shaft is fixedly arranged in the center of the upper surface of the baffle disc, and the upper end of the connecting shaft is connected with a manual adjusting assembly;

manual adjusting part is including fixing a plurality of hand wheels on the connecting axle in proper order from top to bottom, and is a plurality of the diameter of hand wheel is crescent from top to bottom.

Preferably, the number of the hand wheels is three; the upper part of one side of each hand wheel is fixedly provided with a vertical hexagonal prism-shaped bolt; still include the handle, the one end of handle is provided with the blind hole with bolt looks adaptation.

Preferably, a plurality of clamping strips extending along the length direction of the base are further arranged below the base, and the right ends of the clamping strips are bent upwards to be fixedly connected with the edge of the right side of the base; the left end of the clamping strip extends to the middle part of the base and is provided with a vertical second threaded hole; and a puller bolt is adapted in the second threaded hole, and an extrusion plate is arranged at the upper end of the puller bolt.

Preferably, the base is provided with a sliding plate capable of reciprocating towards the left side or the right side of the base, the workpiece fixing block is mounted on the sliding plate, and when the sliding plate moves to a maximum distance away from the base, the workpiece fixing block is enough to be separated from the area below the pressing device; the upper surface of the base is provided with a positioning convex rib, and the positioning convex rib extends towards the right from the left side edge of the base; the lower surface of the sliding plate is provided with sliding grooves matched with the positioning convex edges corresponding to the number of the positioning convex edges, and the sliding grooves extend from the left edge of the sliding plate to the right to be close to the right edge; the positioning convex ribs are clamped in the sliding grooves.

Preferably, the cross sections of the positioning convex ribs and the sliding grooves are in a dovetail shape; the number of the sliding grooves is at least two, and the sliding grooves are symmetrically distributed on the front side and the rear side of the sliding plate.

Preferably, the length of the positioning lug is at least 1/4 times the length of the base.

Preferably, the bottom surface of the left side of the sliding plate is provided with a supporting roller, and the bottom of the supporting roller is flush with the bottom surface of the base.

Preferably, the edge on the right side of the base is bent upwards to form a limiting edge.

Preferably, a first synchronizing gear is arranged in the middle of the connecting shaft, a second synchronizing gear is arranged above the supporting arm, and the first synchronizing gear and the second synchronizing gear are in transmission connection through a synchronous belt; the second synchronous gear is arranged at the upper end of a vertical rotating shaft, the rotating shaft is arranged in the supporting arm, and the lower end of the rotating shaft extends to the bottom of the supporting arm and is connected with the transmission gear; the rear side of the sliding plate is provided with a rack extending along the length direction of the sliding plate, and the transmission gear is meshed with the rack.

Preferably, an annular mounting groove is formed in the circumferential surface of the upper end of the rotating shaft, and the width of the mounting groove is matched with that of the second synchronous gear; a through hole is formed in the center of the second synchronous gear and is sleeved on the rotating shaft in the mounting groove through the through hole; a plurality of mounting holes are formed in the peripheral surface of one section of the rotating shaft in the mounting groove, and the mounting holes extend along the radial direction of the rotating shaft; a plurality of hemispherical grooves are arranged on the wall of the through hole of the second synchronous gear corresponding to the mounting hole; a pushing spring, a pushing plate and a contact steel ball are sequentially arranged in the mounting hole from inside to outside; and one half of the contact steel ball extends into the semispherical groove under the action of the pushing spring.

The beneficial effects of the invention are concentrated and expressed as follows: can use different hand wheels to rotate the screw rod according to the stage of difference, improve efficiency. Specifically, the screw can be driven to rotate by rotating any hand wheel. At the anterior segment that the pressure head pushed down, there is not pressure between pressure head and the work piece, and the accessible is rotatory less hand wheel this moment makes the quick pushing down of pressure head, reachs the contact position with the work piece. At the back end that the pressure head pushed down, the pressure head began to contact with the work piece, and pressure increase, staff's accessible rotatory great hand wheel improves the moment of torsion to satisfy the demand of pressure. Meanwhile, the invention can more accurately adjust the pressure through a larger hand wheel, thereby reducing the requirement on the operation proficiency of workers.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure shown in FIG. 1 in one use state;

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is a schematic view of the internal structure of the pressing device;

FIG. 5 is a schematic view of the installation of the gear and rack;

FIG. 6 is a top view of the slide plate;

FIG. 7 is a top view of the base;

FIG. 8 is a schematic view of a preferred second synchronizing gear installation;

fig. 9 is an enlarged view of a portion a in fig. 8.

Detailed Description

The manual press shown in fig. 1-9 is improved in various aspects to solve several main problems of the current manual press, so as to improve the comprehensive performance of the manual press in various aspects.

The invention relates to a multi-hand wheel manual press, which comprises a base 1 and a pressing device, wherein the pressing device is erected above the base 1 through a supporting arm 2, and the same as the traditional manual press. The base 1 is provided with a workpiece fixing block 3, the workpiece fixing block 3 is used for fixing a workpiece, which is usually a set of clamps, and in some cases, can also be a set of dies, and the workpiece is positioned and installed in the dies.

Compared with the existing manual press, the difference of the present invention in one aspect is that the base 1 is provided with a sliding plate 4 capable of moving back and forth towards the left side or the right side of the base 1, that is, the sliding plate 4 can move back and forth towards the left side along the base 1, or move back and forth towards the right side along the base 1, and of course, the movement of the sliding plate 4 should have a certain limit to avoid the sliding plate 4 from separating from the base 1. The workpiece fixing block 3 is mounted on the slide plate 4, and when the slide plate 4 moves to a maximum distance away from the base 1, the workpiece fixing block 3 is sufficiently separated from the area below the pressing device. Here, it is exemplified that the slide plate 4 is moved to the left, that is, when the slide plate 4 is moved to the leftmost side, the workpiece fixing block 3 mounted on the slide plate 4 is completely separated from below the range where the pressing means is located.

The sliding plate 4 is in sliding engagement with the base 1 in many ways, for example: the base 1 is provided with a slide rail, and the sliding plate 4 is in sliding fit with the base 1 through the slide rail; or a guide hole extending along the length direction of the base 1 is arranged in the base, the left side of the guide hole extends towards the right, a sliding rod matched with the guide hole is arranged on the left side of the sliding plate 4, and the sliding rod is positioned in the guide hole;

of course, besides the above-mentioned manner, the sliding plate 4 of the present invention can be slidably engaged with the base 1, as shown in fig. 6 and 7, the upper surface of the base 1 is provided with the positioning rib 5, and the positioning rib 5 extends from the left edge of the base 1 to the right. The lower surface of the sliding plate 4 is provided with sliding grooves 6 matched with the positioning convex edges 5 corresponding to the positioning convex edges 5, the sliding grooves 6 extend from the left side edge of the sliding plate 4 to the right side edge, and the positioning convex edges 5 are clamped in the sliding grooves 6. Generally, the number of the sliding grooves 6 is at least two, and the sliding grooves 6 are symmetrically distributed on the front and the rear sides of the sliding plate 4, but more sliding grooves 6 and positioning ribs 5 are also possible. The cross section of the groove cavity of the sliding groove 6 and the cross section of the positioning convex edge 5 can be in a convex shape, also can be in a dovetail shape or other shapes with the same effect, so that the positioning convex edge 5 can stably slide in the sliding groove 6, and the positioning convex edge 5 cannot be separated from the sliding groove 6 from the vertical direction.

In the process that the sliding plate 4 moves towards the left, the limit of the left limit of the sliding plate is formed by the fact that the end part of the right end of the positioning convex rib 5 abuts against the end part of the right end of the sliding groove 6, so that the length of the positioning convex rib 5 is not too long, and if the length is too long, the workpiece fixing block 3 cannot be completely separated from the corresponding area of the pressing device. But it should not be too short to play a role in improving the guiding stability, and generally, the length of the positioning protruding edge 5 is at least 1/4 of the length of the base 1 under the condition that the workpiece fixing block 3 can slide in place, and the longer the length of the positioning protruding edge 5 is, the better the guiding stability is. As for the slide plate 4, during the movement towards the right, the limit of the right limit is formed by the additional added limit piece. The limiting member may be specifically formed by bending the edge on the right side of the base 1 upward to form a limiting edge 8, or it is also feasible to directly arrange a limiting pin, a limiting piece, and the like on the edge on the right side of the base 1.

The workpiece fixing block 3 is used for fixing a workpiece, and the workpiece fixing block 3 is arranged on the sliding plate 4, so that the sliding plate 4 can slide towards the side surface of the base 1, and the workpiece fixing block 3 is separated from the area below the pressing device. The invention can realize the loading and unloading of the workpiece on the side surface of the press machine, and is very convenient for observing, dismounting, positioning and the like of the workpiece. Meanwhile, the press machine can conveniently disassemble and assemble the workpiece without adjusting the pressing device to a high point, so that the overall height of the press machine is reduced, and the processing efficiency is indirectly improved.

The manual press machine of the present invention is usually placed on a table for use, and in the process of processing a part of the workpiece, in view of the heavy weight of the workpiece, in order to support the left side of the sliding plate 4, it is better to provide a support roller 7 on the bottom surface of the left side of the sliding plate 4, and the bottom of the support roller 7 is flush with the bottom surface of the base 1. After the mode, the supporting roller 7 can roll on the table top, so that the left side of the sliding plate 4 is supported, the sliding stability between the sliding groove 6 and the positioning convex rib 5 is ensured, and the risk of deformation of the positioning convex rib 5 and the sliding plate 4 is reduced. Of course, the slide plate 4 itself can be provided with sufficient supporting force for a light workpiece, and the supporting rollers 7 need not be provided.

The driving mode of the sliding plate 4 according to the present invention can be a direct manual dragging, for example: the left side of sliding plate 4 sets up the handle, and the staff directly utilizes the handle can realize sliding plate 4's pull, switches the position of sliding plate 4, and this kind of mode is very simple, but often need cooperate the locking Assembly to lock sliding plate 4 in the position of extreme position, prevents sliding plate 4 and the in-process that the press device pressed the work piece and the dislocation drunkenness appears, common locking Assembly such as bolt formula locking Assembly, magnetic force absorption formula locking Assembly etc..

However, the mode of setting the handle and locking the sliding plate 4 by the locking member still requires the active operation of the operator, and is not ideal in terms of reducing the complexity of the operation of the operator. After long-term research and development, the better scheme of the invention can also be that the sliding of the sliding plate 4 is directly linked with the pressing device and the locking is automatically completed. As is known, a manual press may, in its main form, comprise, in a driving member: rack drive type, lever drive type, screw drive type, and the like, the screw drive type pressing device has the advantages of good pressure maintaining performance, excellent equipment stability, and the like, and is a mainstream technical route in the market at present compared with the rack drive type pressing device, the lever drive type pressing device, and the like. Therefore, the present invention will be described in detail with emphasis on a screw-driven pressing device.

As shown in fig. 4, generally, the pressing device includes a vertical mounting cylinder 9, the mounting cylinder 9 is fixedly connected to the support arm 2, a central hole in the mounting cylinder 9 is square, a square top pillar 10 matched with the central hole is arranged in the central hole, and the top pillar 10 is in sliding fit with the mounting cylinder 9, that is, the top pillar 10 can slide up and down stably along the mounting cylinder 9 under other forces. The lower end of the ejection column 10 extends out of the mounting cylinder 9 and is fixedly connected with the pressure head 11, and the pressure head 11 can also be detachably connected with the ejection column 10 in a threaded connection mode, a bolt connection mode and the like, so that different pressure heads 11 can be conveniently replaced aiming at different workpieces.

A vertical first threaded hole is formed in the upper section of the top pillar 10, the upper section of the top pillar 10 is sleeved outside the screw 12 through the first threaded hole and forms a threaded fit with the screw 12, in other words, the lower section of the screw 12 is arranged in the first threaded hole in the upper section of the top pillar 10 in a penetrating manner and forms a threaded fit with the top pillar 10. The upper end of the screw 12 is also provided with a baffle disc 13, and the baffle disc 13 is placed on a boss 14 at the top end of the mounting cylinder 9. The upper end of the installation cylinder 9 is further provided with an end cover 15, the end cover 15 is sleeved outside the boss 14 and the baffle disc 13, the end cover 15 is connected with the installation cylinder 9 through a bolt 16, and the screw 12 is sealed in the installation cylinder 9. The center of the upper surface of the baffle disc 13 is fixedly provided with a vertical connecting shaft 17, and the upper end of the connecting shaft 17 is connected with a manual adjusting assembly. The manual adjusting assembly has more specific structures, such as: the manual adjusting component is a crank arm or a hand wheel.

Regarding the linkage between the pressing device and the sliding plate 4, a first synchronizing gear 18 is arranged in the middle of the connecting shaft 17, a second synchronizing gear 19 is arranged above the supporting arm 2, the first synchronizing gear 18 and the second synchronizing gear 19 are in transmission connection through a synchronizing belt 20, and the second synchronizing gear 19 is installed at the upper end of a vertical rotating shaft 21. When in use, the connecting shaft 17 rotates to drive the rotating shaft 21 to rotate synchronously through the first synchronous gear 18, the synchronous belt 20 and the second synchronous gear 19 in sequence. The rotating shaft 21 is arranged in the supporting arm 2, and the lower end of the rotating shaft 21 extends to the bottom of the supporting arm 2 and is connected with the transmission gear 22; the rear side of the sliding plate 4 is provided with a rack 23 extending along the length direction of the sliding plate 4, and the transmission gear 22 is engaged with the rack 23. Therefore, when the invention is used, when the connecting shaft 17 drives the mandril 10 to ascend through the screw 12, the connecting shaft 17 also drives the sliding plate 4 to move leftwards through the first synchronous gear 18, the synchronous belt 20, the second synchronous gear 19, the rotating shaft 21, the transmission gear 22 and the rack 23 in sequence, thereby facilitating the loading and unloading of workpieces; when the connecting shaft 17 drives the ram 10 to ascend through the screw 12, the slide plate 4 moves to the right side, and the ram 11 continues to descend to press the workpiece.

After the action of the pressing device is linked with the sliding plate 4 by adopting the mode, the steps of pulling the sliding plate 4 and locking the sliding plate 4 by using the locking component are directly omitted, the sliding plate 4 is driven by the rotation of the connecting shaft 17, and the accurate positioning of the sliding plate 4 is realized by the meshing of the transmission gear 22 and the rack 23, so that the use is more convenient and quicker, and the processing efficiency is further improved. However, this method has a certain disadvantage in that the pressing device and the sliding plate 4 are rigidly linked, and therefore, it is required that the operation of the pressing device and the movement of the sliding plate 4 have extremely high matching accuracy. For this purpose, the invention can be further improved, in such a new way that the slide plate 4 is advanced with respect to the pressing device, i.e. the slide plate 4 has been retracted and reaches the designated pressing position when the ram of the pressing device is not lowered to the pressing position; when the ram of the pressing device is not raised to the highest position, the slide plate 4 has been extended and reaches a specified mounting and dismounting position.

Specifically, as shown in fig. 8 and 9, an annular mounting groove 24 is formed on the circumferential surface of the upper end of the rotating shaft 21, and the width of the mounting groove 24 is matched with the width of the second synchronizing gear 19. A through hole is formed in the center of the second synchronous gear 19 and is sleeved on the rotating shaft 21 in the mounting groove 24 through the through hole; a plurality of mounting holes 25 are formed in the circumferential surface of a section of the rotating shaft 21 in the mounting groove 24, and the mounting holes 25 extend along the radial direction of the rotating shaft 21; a plurality of hemispherical grooves 26 are arranged on the wall of the through hole of the second synchronous gear 19 corresponding to the mounting hole 25; the mounting hole 25 is internally provided with a pushing spring 27, a pushing plate 28 and a contact steel ball 29 from inside to outside in sequence. In the normal driving state, the pushing spring 27 is in a natural state, and half of the contact steel ball 29 extends into the hemispherical groove 26 under the action of the pushing spring 27. When the slide plate 4 reaches a predetermined position (i.e., a limit position) and is restrained, the ejector spring 27 is compressed, and the contact steel ball 29 and the ejector plate 28 are pressed back into the mounting hole 25. At this time, the second synchronizing gear 19 and the rotating shaft 21 are in a free rotation state, and no transmission is performed, so that the clutch and separation function is realized. Through the arrangement, the sliding plate 4 can realize self-locking in advance, and power transmission between the sliding plate and the connecting shaft 17 is disconnected, so that the use is more convenient.

In addition to the above improvement of the manual press machine in the aspect of the sliding plate 4, the present invention also performs an optimized improvement on the screw type pressing device, and realizes self-lubrication of the pressing device, so that the manual press machine has better stability and smoothness.

Specifically, as shown in fig. 4, the circumferential surface of the top pillar 10 of the present invention is recessed inward to form an oil groove, a first rubber packing 36 is provided between the lower portion of the mounting tube 9 and the top pillar 10, and the oil groove cavity above the first rubber packing 36 forms the pumping cavity 30. The pumping cavity 30 is used for driving the flow of lubricating oil in a squeezing and pumping mode to realize automatic lubrication. An oil box 31 is arranged on the outer side wall of the lower part of the mounting cylinder 9. The oil box 31 is filled with lubricating oil, and the side walls of the upper part and the lower part of the mounting cylinder 9 are provided with a first oil hole 32 and a second oil hole 33 which penetrate through the inner surface and the outer surface of the mounting cylinder 9. When the top pillar 10 is located at the highest position, the first oil hole 32 is opposite to the upper end of the screw 12, and the second oil hole 33 is opposite to the bottom of the pumping cavity 30. The first oil hole 32 and the second oil hole 33 are respectively communicated with the oil box 31 through an oil conveying small pipe 34.

In the working process of the pressing device, the screw 12 is driven to rotate by the manual adjusting assembly, the screw 12 rotates to drive the ejector rod 10 to slide in the mounting cylinder 9, and the pressing head 11 arranged at the lower end of the ejector rod 10 can extrude a workpiece. In the process that the ejector rod 10 moves downwards, the volume of the pumping cavity 30 is continuously compressed, lubricating oil in the oil box 31 is pressed into a gap left after the ejector rod 10 moves downwards through the small oil conveying pipe and the first oil hole 32 in sequence, so that the outer side of the screw 12 is filled with the lubricating oil, and the lubricating effect between the screw 12 and the ejector rod 10 is mainly achieved. In the process that the ejector pin 10 moves upwards, the volume of the pumping cavity 30 is continuously enlarged, lubricating oil in the oil box 31 is sucked into the pumping cavity 30 through the small oil conveying pipe and the second oil hole 33 in sequence, the pumping cavity 30 is filled fully, and the lubricating effect between the ejector pin 10 and the mounting cylinder 9 is mainly achieved. Therefore, through reasonable design, the self-lubricating device realizes self-lubrication between the screw 12 and the ejector rod 0 and between the ejector rod 10 and the mounting cylinder 9, ensures that the action relationship among all the parts is smoother, saves more labor and prolongs the service life of all the parts.

On this basis, the side of oil box 31 is provided with transparent observation window usually, conveniently observes the lubricating oil liquid level height in the oil box 31. In order to conveniently supplement lubricating oil into the oil box 31, an oil supplementing port 35 is arranged on the oil box 31, a sealing cover is in threaded connection with the oil supplementing port 35, the lubricating oil can be added by opening the sealing cover, and the sealing cover is simple in structure and not shown in the drawing. In addition, a second rubber packing 37 is provided between the boss 14 and the upper end of the screw 12 in order to prevent the lubricating oil from overflowing between the boss 14 and the screw 12.

In addition to the above improvements from the two aspects of the sliding plate 4 and the self-lubrication, the present invention also discloses an improved scheme of a manual adjustment assembly for a screw type pressing device, which is shown in fig. 1-3, the manual adjustment assembly includes a plurality of hand wheels 38 sequentially fixed on the connecting shaft 17 from top to bottom, and the diameters of the plurality of hand wheels 38 gradually increase from top to bottom. The number of handwheels 38 may be 2, 3, 4, etc., typically the number of handwheels 38 is three.

During use, the manual adjustment assembly can drive the screw 12 to rotate by rotating any hand wheel 38. At the front section of pressing of the pressure head 11, no pressure exists between the pressure head 11 and the workpiece, and at the moment, the pressure head 11 can be quickly pressed down by rotating the small hand wheel 38 to reach the contact position with the workpiece. At the back end that pressure head 11 pushed down, pressure head 11 and work piece begin to contact, and pressure increases, and staff's accessible is rotatory great hand wheel 38, improves the moment of torsion to satisfy the demand of pressure. In fig. 1, at the front stage of pressing down, the connecting shaft 17 can be rapidly rotated by the uppermost hand wheel 38, thereby functioning to rapidly rotate the screw 12. At the rear section of pushing down, along with pressure grow, it can be comparatively labourious to rotate the hand wheel 38 of the top, and at this moment, rotatable middle one or a hand wheel 38 of the bottom to play the effect of improvement moment of torsion. Of course, after the workpiece is pressed, pressure maintaining is often required, and if the small hand wheel 38 is directly adjusted, excessive adjustment is easily caused. The present invention allows for more accurate pressure adjustment by means of the largest hand wheel 38, thus reducing the need for operator proficiency.

On the basis, in order to facilitate the rotation of the hand wheels 38, the upper part of one side of each hand wheel 38 is fixedly provided with a vertical hexagonal prism-shaped bolt 39; the handle is characterized by further comprising a handle 40, wherein a blind hole matched with the plug pin 39 is formed in one end of the handle 40. The handle 40 is sleeved into the bolt 39 on the corresponding hand wheel 38, so that the corresponding hand wheel 38 can rotate, and the comfort is stronger.

In addition, in order to improve the overall installation stability of the manual press, the invention also discloses a fixing scheme of the manual press, which is characterized in that a plurality of clamping strips 41 extending along the length direction of the base 1 are further arranged below the base 1, and the right ends of the clamping strips 41 are bent upwards and fixedly connected with the edge on the right side of the base 1; the left end of the clamping bar 41 extends to the middle part of the base 1 and is provided with a vertical second threaded hole; a puller bolt 42 is fitted in the second threaded hole, and an extrusion plate 43 is arranged at the upper end of the puller bolt 42. During the use, will bear the desktop card between two 41 and the base 1 of card machine, then utilize puller bolt 42 and stripper plate 43 jack-up desktop to prevent that manual press from appearing rocking on the whole.

Claims

1. A multi-hand-wheel manual press comprises a base (1) and a pressing device, wherein the pressing device is erected above the base (1) through a supporting arm (2), and a workpiece fixing block (3) is arranged on the base (1);

the method is characterized in that: the pressing device comprises a vertical mounting cylinder (9), the mounting cylinder (9) is fixedly connected with the supporting arm (2), a central hole in the mounting cylinder (9) is square, a square ejection column (10) matched with the central hole is arranged in the central hole, and the ejection column (10) is in sliding fit with the mounting cylinder (9); the lower end of the top column (10) extends out of the mounting cylinder (9) and is fixedly connected with the pressure head (11), a vertical first threaded hole is formed in the upper section of the top column (10), and the upper section of the top column (10) is sleeved outside the screw rod (12) through the first threaded hole and forms threaded fit with the screw rod (12); the upper end of the screw rod (12) is also provided with a baffle disc (13) and is placed on a boss (14) at the top end of the mounting cylinder (9) through the baffle disc (13); an end cover (15) is further arranged at the upper end of the mounting cylinder (9), the end cover (15) is sleeved outside the boss (14) and the baffle disc (13), and the end cover (15) is connected with the mounting cylinder (9) through a bolt (16); a vertical connecting shaft (17) is fixedly arranged at the center of the upper surface of the baffle disc (13), and the upper end of the connecting shaft (17) is connected with a manual adjusting assembly;

the manual adjusting assembly comprises a plurality of hand wheels (38) which are sequentially fixed on the connecting shaft (17) from top to bottom, and the diameters of the hand wheels (38) are gradually increased from top to bottom;

a first synchronizing gear (18) is arranged in the middle of the connecting shaft (17), a second synchronizing gear (19) is arranged above the supporting arm (2), and the first synchronizing gear (18) is in transmission connection with the second synchronizing gear (19) through a synchronous belt (20); the second synchronous gear (19) is installed at the upper end of a vertical rotating shaft (21), the rotating shaft (21) is installed in the supporting arm (2), and the lower end of the rotating shaft (21) extends to the bottom of the supporting arm (2) and is connected with the transmission gear (22); the base (1) is provided with a sliding plate (4) capable of moving towards the left side or the right side of the base (1) in a reciprocating mode, a rack (23) extending along the length direction of the sliding plate (4) is arranged on the rear side of the sliding plate (4), and the transmission gear (22) is meshed with the rack (23).

2. A multi-hand wheel manual press as claimed in claim 1, wherein: an annular mounting groove (24) is formed in the peripheral surface of the upper end of the rotating shaft (21), and the width of the mounting groove (24) is matched with that of the second synchronous gear (19); a through hole is formed in the center of the second synchronous gear (19) and is sleeved on the rotating shaft (21) in the mounting groove (24) through the through hole; the peripheral surface of a section of rotating shaft (21) in the mounting groove (24) is provided with a plurality of mounting holes (25), and the mounting holes (25) extend along the radial direction of the rotating shaft (21); a plurality of hemispherical grooves (26) are arranged on the wall of the through hole of the second synchronous gear (19) corresponding to the mounting hole (25); a pushing spring (27), a pushing plate (28) and a contact steel ball (29) are sequentially arranged in the mounting hole (25) from inside to outside; one half of the contact steel ball (29) extends into the semispherical groove (26) under the action of the pushing spring (27).

3. A multi-hand wheel manual press as claimed in claim 2, wherein: the number of the hand wheels (38) is three; the upper part of one side of each hand wheel (38) is fixedly provided with a vertical hexagonal prism-shaped bolt (39); the handle is characterized by further comprising a handle (40), wherein a blind hole matched with the plug pin (39) is formed in one end of the handle (40).

4. A multi-hand wheel manual press as claimed in claim 3, wherein: a plurality of clamping strips (41) extending along the length direction of the base (1) are further arranged below the base (1), and the right ends of the clamping strips (41) are bent upwards and fixedly connected with the edge of the right side of the base (1); the left end of the clamping strip (41) extends to the middle part of the base (1) and is provided with a vertical second threaded hole; and a puller bolt (42) is fit in the second threaded hole, and an extrusion plate (43) is arranged at the upper end of the puller bolt (42).

5. A multi-hand wheel manual press as claimed in claim 4, wherein: the workpiece fixing block (3) is arranged on the sliding plate (4), and when the sliding plate (4) moves to a maximum distance away from the base (1), the workpiece fixing block (3) is enough to be separated from the area below the pressing device; the upper surface of the base (1) is provided with a positioning convex rib (5), and the positioning convex rib (5) extends towards the right from the left side edge of the base (1); the lower surface of the sliding plate (4) is provided with sliding grooves (6) matched with the positioning convex ribs (5) corresponding to the number of the positioning convex ribs (5), and the sliding grooves (6) extend from the left edge of the sliding plate (4) to the right to be close to the right edge; the positioning convex ribs (5) are clamped in the sliding grooves (6).

6. A multi-hand wheel manual press according to claim 5, wherein: the cross sections of the positioning convex ribs (5) and the sliding grooves (6) are in a dovetail shape; the number of the sliding grooves (6) is at least two, and the sliding grooves (6) are symmetrically distributed on the front side and the rear side of the sliding plate (4).

7. A multi-hand wheel manual press as claimed in claim 6, wherein: the length of the positioning convex rib (5) is at least 1/4 of the length of the base (1).

8. A multi-hand wheel manual press as claimed in claim 7, wherein: the bottom surface of the left side of the sliding plate (4) is provided with a bearing roller (7), and the bottom of the bearing roller (7) is flush with the bottom surface of the base (1).

9. A multi-hand wheel manual press as claimed in claim 8, wherein: the edge on the right side of the base (1) is bent upwards to form a limiting edge (8).