阅读说明：本技术 一种用于粗纱机自动落纱的同步内撑多纱管抓取机构 (Synchronous internal-supporting multi-bobbin grabbing mechanism for automatic doffing of roving frame ) 是由 高贵军 寇子明 刘国红 景毅 郑杰 于 2020-05-29 设计创作，主要内容包括：本发明属于环锭纺落纱设备技术领域,公开了一种用于粗纱机自动落纱的同步内撑多纱管抓取机构,包括横梁,电动推杆和多个抓取爪,抓取爪包括斜槽块、推杆、立筒、楔块、弹簧杆和两根摆杆,电动推杆用于推动斜槽块沿横梁做直线运动,斜槽块表面设置有斜槽,推杆顶部与设置在斜槽内的销子连接；立筒固定设置在横梁底部,推杆底部穿过立筒后通过弹簧杆与楔块连接,第二弹簧套设在弹簧杆外周并位于弹簧杆与推杆之间；两根摆杆的一端与立筒铰接,另一端通过第一弹簧连接,摆杆内侧设置有与楔块配合的楔面。本发明通过伸入纺好的纱管当中进行撑紧和放松的方法,实现抓取纱管,整体机构简单,造价也较低,抓取效率高。(The invention belongs to the technical field of ring spinning doffing equipment, and discloses a synchronous internal-supporting multi-bobbin grabbing mechanism for automatic doffing of a roving frame, which comprises a cross beam, an electric push rod and a plurality of grabbing claws, wherein each grabbing claw comprises a chute block, a push rod, a vertical cylinder, a wedge block, a spring rod and two swing rods; the vertical cylinder is fixedly arranged at the bottom of the cross beam, the bottom of the push rod penetrates through the vertical cylinder and then is connected with the wedge block through a spring rod, and a second spring is sleeved on the periphery of the spring rod and is positioned between the spring rod and the push rod; one end of each of the two swing rods is hinged with the vertical cylinder, the other end of each of the two swing rods is connected with the vertical cylinder through a first spring, and wedge surfaces matched with the wedge blocks are arranged on the inner sides of the swing rods. The bobbin grabbing device can grab the bobbin by stretching into the spun bobbin for tightening and loosening, and has the advantages of simple integral mechanism, lower manufacturing cost and high grabbing efficiency.)

1. A synchronous internal-supporting multi-bobbin grabbing mechanism for automatic doffing of a roving frame is characterized by comprising a cross beam (12), an electric push rod (15) and a plurality of grabbing claws, wherein each grabbing claw comprises a chute block (10), a push rod (1), a vertical cylinder (2), a wedge block (6), a spring rod (9) and two swing rods (3), the electric push rod (15) is used for pushing the chute block (10) to move along the cross beam (12), a chute (18) is arranged on the surface of the chute block (10), and the top of the push rod (1) is connected with a pin (11) arranged in the chute (18); the vertical cylinder (2) is fixedly arranged at the bottom of the cross beam (12), the bottom of the push rod (1) penetrates through the vertical cylinder (2) and then is connected with the wedge block (6) through a spring rod (9), and a second spring (8) is sleeved on the periphery of the spring rod (9) and is positioned between the spring rod and the push rod (1); one ends of the two swing rods (3) are hinged with the vertical cylinder (2), the other ends of the two swing rods are connected through a first spring (5), and wedge surfaces matched with the wedge blocks (6) are arranged on the inner sides of the swing rods (3).

2. The synchronous internal-supporting multi-bobbin grasping mechanism for automatic doffing of the roving frame according to claim 1, further comprising a connecting pipe (13) and a hollow movable frame (14), wherein the electric push rod (15) is arranged in the movable frame (14) and is in contact with the movable frame (14); the grabbing claws are uniformly arranged on two sides of the movable frame (14), and the chute blocks (10) which are positioned on the same side and grab the claws are connected through a connecting pipe (13) and then connected with the movable frame (14).

3. The synchronous internal-supporting multi-bobbin grasping mechanism for automatic doffing of the roving frame according to claim 2, characterized in that a guide rail (16) is arranged on the cross beam (12), and the movable frame (14) slides along the guide rail (16) under the action of an electric push rod (15).

4. The synchronous internal-supporting multi-bobbin gripping mechanism for automatic doffing of the roving frame according to claim 2, wherein the number of gripping claws is 4.

5. The synchronous internal-supporting multi-bobbin grabbing mechanism for automatic doffing of the roving frame according to claim 1, wherein the grabbing claw further comprises a nut (7), the outer side of the bottom of the push rod (1) is provided with threads, the inner side of the bottom of the push rod is provided with a cavity, the nut (7) is in threaded connection with the bottom of the push rod (1), the top of the spring rod (9) is arranged in the cavity, and the bottom of the spring rod passes through the nut (7) and is fixedly connected with the wedge block (6).

6. A synchronous internal stay multi-bobbin grasping mechanism for automatic doffing of roving frames according to claim 5 characterized in that the spring lever (9) is screwed with the wedge block (6).

7. The synchronous internally-supported multi-bobbin grabbing mechanism for automatic doffing of the roving frame according to claim 1, wherein a rubber layer (4) is arranged outside the swing rod (3), and the rubber layer (4) is bonded with the swing rod (3).

8. The synchronous internal-supporting multi-bobbin grasping mechanism for automatic doffing of the roving frame according to claim 1, wherein the pin (11) is connected with the push rod (1) by welding.

9. The synchronous internal-supporting multi-bobbin grasping mechanism for automatic doffing of the roving frame according to claim 1, wherein the vertical bobbin (2) is in clearance fit with the push rod (1).

Technical Field

The invention belongs to the technical field of ring spinning doffing equipment, and relates to a synchronous inner-supporting multi-bobbin grabbing mechanism for automatic doffing of a roving frame, which is used for realizing synchronous inner-supporting grabbing of a plurality of bobbins.

Background

Ring spinning is a very popular spinning technique in which the spun bobbin needs to be removed during the roving process, known as doffing. The grabbing mode of the bobbin at present mainly adopts the following three modes:

(1) and (5) artificial doffing. In the mode, the spun yarn tube is grabbed by hands, and the quality of the yarn is reduced due to the fact that the hands contact the yarn.

(2) And (5) pneumatically grabbing the yarns. The mode adopts the top to grab the bobbin, the movable tongue is pushed pneumatically to realize the bobbin grabbing, the pneumatic action time is slow, the grabbing efficiency is low, a compressed air source and an air pipe are needed, and the cost is high.

(3) And (5) grabbing the yarn by a mechanical hand. The mode adopts the mechanical hand to grasp, so that the bobbin can be stably grasped, the grasping force is high, the grasping part is often inaccurate, and the yarn and the spindle are easily damaged.

There is a mechanical arm mechanism for grabbing bobbins in ring spinning doffing, as disclosed in patent CN102719942A, which includes a base, two fingers, two swing rods, two rotating shafts and two spring members. Although this mechanism can realize the top of spool and snatch and release fast, nevertheless have following shortcoming:

(1) the tube grabbing time is not accurate, and the spindle is easy to be damaged. According to the bobbin grabbing device, the second swing rod of the yarn grabbing mechanism is poked by the second poking block on the doffer to realize that the second finger rotates to grab the bobbin, and due to certain errors in the movement of the yarn grabbing mechanism, the bobbin grabbing time is often inaccurate, the bobbin grabbing failure is easy, or a spindle is damaged.

(2) The two swing rods are respectively shifted by the two shifting blocks, the mechanism occupies a large space, the structure is complex, the quality is large, more than ten yarn holding mechanisms are generally adopted on the doffer, so the space occupancy rate, the structural complexity and the like of the yarn holding mechanisms greatly influence the whole machine performance and reliability of the doffer, and the maintenance cost is increased.

The invention discloses a contact unlocking type quick yarn holding mechanism of a short ring spinning doffer, which is published under the patent number CN103556323A, and discloses the contact unlocking type quick yarn holding mechanism of the short ring spinning doffer, which is used for automatic doffing of a spinning frame. The mechanism realizes the contact unlocking type quick yarn gripping function, has the advantages of large gripping force, accurate gripping time and the like, and has the defects of yarn damage and the like possibly caused by manufacturing errors of the yarn tube.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides a synchronous inner-supporting multi-bobbin grabbing mechanism for automatic doffing of a roving frame, and can effectively realize grabbing of the inner walls of a plurality of bobbins by synchronous inner-supporting.

In order to solve the technical problems, the invention adopts the technical scheme that: a synchronous internal-supporting multi-bobbin grabbing mechanism for automatic doffing of a roving frame comprises a cross beam, an electric push rod and a plurality of grabbing claws, wherein each grabbing claw comprises a chute block, a push rod, a vertical cylinder, a wedge block, a spring rod and two swing rods; the vertical cylinder is fixedly arranged at the bottom of the cross beam, the bottom of the push rod penetrates through the vertical cylinder and then is connected with the wedge block through a spring rod, and a second spring is sleeved on the periphery of the spring rod and is positioned between the spring rod and the push rod; one ends of the two swing rods are hinged with the vertical cylinder, the other ends of the two swing rods are connected through a first spring, and wedge surfaces matched with the wedge blocks are arranged on the inner sides of the swing rods.

Preferably, the synchronous internally-supporting multi-bobbin grabbing mechanism for automatic doffing of the roving frame further comprises a connecting pipe and a hollow movable frame, and the electric push rod is arranged in the movable frame and is in contact with the movable frame; the grabbing claws are evenly arranged on two sides of the movable frame, and the chute blocks located on the same side of the grabbing claws are connected through a connecting pipe and then connected with the movable frame.

Preferably, the cross beam is provided with a guide rail, and the movable frame slides along the guide rail under the action of the electric push rod.

Preferably, the number of the gripping claws is 4.

Preferably, the grabbing claw further comprises a nut, the outer side of the bottom of the push rod is provided with threads, the inner side of the bottom of the push rod is provided with a cavity, the nut is connected with the bottom of the push rod through the threads, the top of the spring rod is arranged in the cavity, and the bottom of the spring rod penetrates through the nut and is fixedly connected with the wedge block.

Preferably, the spring rod is threadedly connected to the wedge.

Preferably, a rubber layer is arranged on the outer side of the swing rod, and the rubber layer is bonded with the swing rod.

Preferably, the pin and the push rod are connected by welding.

Preferably, the vertical cylinder and the push rod are in clearance fit.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention provides a synchronous internal-supporting multi-bobbin grabbing mechanism for automatic doffing of a roving frame. The mechanism can be used as a hand grab for grabbing bobbins during automatic doffing of the roving frame, is used for stably, quickly and synchronously grabbing a plurality of bobbins, and is high in bobbin grabbing efficiency and reliability; the yarn is not directly contacted, and the yarn is not damaged; the whole structure is simple.

2. The grabbing mechanism is stretched into the spun yarn tube to be tightened and loosened, so that the yarn tube is grabbed without being in direct contact with the yarn, and the yarn can be prevented from being damaged.

3. The invention adopts the mode of the electric push rod for operation, the electric push rod has high precision, and the stroke can be controlled, so that the grabbing work is accurately and synchronously carried out. The action of the electric push rod rapidly improves the grabbing efficiency, the electric push rod is good in self-locking performance, and the grabbing force is guaranteed to be large enough to effectively grab the bobbin, so that the grabbing work is normally carried out. The whole mechanism is simple, and the manufacturing cost is lower. The mechanism has fewer parts and high reliability, so that the maintenance cost is greatly reduced.

Drawings

Fig. 1 is a schematic structural diagram of a synchronous inner-supporting multi-bobbin grasping mechanism for automatic doffing of a roving frame according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a grasping claw according to an embodiment of the present invention;

FIG. 3 is a schematic top view of FIG. 1;

FIG. 4 is a schematic view of the expanded structure of the grasping claw of the present invention;

fig. 5 is a schematic view of bobbin grabbing of the synchronous inner-supporting multi-bobbin grabbing mechanism for automatic doffing of the roving frame provided by the embodiment of the invention.

In the figure: 1: a push rod; 2: erecting a cylinder; 3: a swing rod; 4: a rubber layer; 5: a first spring; 6: a wedge block; 7: a nut; 8: a second spring; 9: a spring lever; 10: a chute block; 11: a pin; 12: a cross beam; 13: a connecting pipe; 14: a movable frame; 15: an electric push rod; 16: a guide rail; 17: a bobbin; 18: a chute.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 3, an embodiment of the present invention provides a synchronous inner-supporting multi-bobbin grasping mechanism for automatic doffing of a roving frame, including a cross beam 12, an electric push rod 15 and four grasping claws. This embodiment sets up four claws of grabbing, can once only snatch four spool, and this is the efficiency of considering grabbing the spool on the one hand, and on the other hand is considered if snatching more, snatchs the weight and the volume of mechanism and can increase, leads to electric putter's load increase, and the load that the arm bore in addition also can increase, will be unfavorable for going on of whole doffing process. However, the practice of the present invention is not limited to four grasping claws.

As shown in fig. 2, the grabbing claw comprises a chute block 10, a push rod 1, a vertical cylinder 2, a wedge block 6, a spring rod 9 and two swing rods 3, wherein an electric push rod 15 is used for pushing the chute block 10 to do linear motion along a cross beam 12, a chute 18 is arranged on the surface of the chute block 10, and the top of the push rod 1 is connected with a pin 11 arranged in the chute 18; the vertical cylinder 2 is fixedly arranged at the bottom of the cross beam 12, the bottom of the push rod 1 penetrates through the vertical cylinder 2 and then is connected with the wedge block 6 through the spring rod 9, and the second spring 8 is sleeved on the periphery of the spring rod 9 and is positioned between the spring rod 9 and the push rod 1; one ends of the two swing rods 3 are hinged with the vertical cylinder 2, the other ends of the two swing rods are connected through a first spring 5, and wedge surfaces matched with the wedge blocks 6 are arranged on the inner sides of the swing rods 3.

Further, in this embodiment, the vertical cylinder 2 and the push rod 1 are in clearance fit. The chute in the chute block 10 is in clearance fit with the pin 11, and the pin 11 is welded with the push rod 1, so that the horizontal linear motion of the chute block 10 is converted into the vertical linear motion of the push rod 1. Be provided with second spring 8 between spring beam 9 and push rod 1, then can make push rod 1 drive spring beam 9 and voussoir 6 realize ascending linear motion and promote pendulum rod 3 and strut on the one hand, on the other hand, under the existence machining error condition of spool inner wall, second spring 8 can carry out automatically regulated to the stroke of spring beam 9 and voussoir 6, avoids because and lead to snatching the mechanism and can not snatch a plurality of spools simultaneously, has guaranteed the synchronism and the reliability of snatching the action.

Further, as shown in fig. 3, the synchronous internally-supported multiple bobbin grasping mechanism for automatic doffing of the roving frame of the present embodiment further includes a connecting pipe 13 and a hollow movable frame 14, and the electric push rod 15 is disposed in the movable frame 14 and contacts with the movable frame 14; the 4 grabbing claws are arranged on two sides of the movable frame 14 in pairs, the chute blocks 10 of the 2 grabbing claws located on the same side are connected through the connecting pipe 13, and then one chute block is connected with the movable frame 14, specifically, the connection mode of the chute blocks 10, the connecting pipe 13 and the movable frame 14 can be welding, and other fixed connection modes can also be adopted, such as bolt connection. Therefore, when the motor push rod 15 stretches under the driving of the motor, the movable frame 14 is driven to move, the chute block 10 of the grabbing claw is further pushed to move linearly, and the electric push rod has the advantages of high precision, small size, good self-locking performance and the like.

Further, as shown in fig. 3, a guide rail 16 is disposed on the cross beam 12, and the movable frame 14 slides along the guide rail 16 under the action of the electric push rod 15.

Further, as shown in fig. 2, the grabbing claw further comprises a nut 7, the outer side of the bottom of the push rod 1 is provided with threads, the inner side of the bottom is provided with a cavity, the nut 7 is connected with the bottom of the push rod 1 through the threads, the top of the spring rod 9 is arranged in the cavity, and the bottom of the spring rod penetrates through the nut 7 and is fixedly connected with the wedge block 6.

Further, in the present embodiment, the spring rod 9 is screwed to the wedge 6. The tail of the spring rod 9 is provided with threads and is connected with the wedge block 6 through threaded connection, so that the spring rod 9 drives the wedge block 6 to move linearly.

Further, in the present embodiment, a rubber layer 4 is disposed outside the swing link 3, and the rubber layer 4 is bonded to the swing link 3. The rubber layer 4 is used for reducing impact caused by the swing of the swing rod 3 and preventing the bobbin from being damaged.

Fig. 4 is a schematic view of a structure that a swing link in a gripping claw is spread in this embodiment, and fig. 5 is a schematic view of a bobbin gripping mechanism for a synchronous inner-spreading multi-bobbin for automatic doffing of a roving frame according to an embodiment of the present invention. The working process of the invention is as follows: the cross beam 12 of the grabbing mechanism of the embodiment is connected with the tail end of a robot, when grabbing is needed, the robot drives the cross beam 12 to reach a bobbin, a swing arm at the lower end of a push rod 1 enters the bobbin, at the moment, a swing rod 3 is not spread, and a first spring 5 is in a free state; then an electric push rod 15 with a set push stroke pushes a chute block 10 to move, so that a push rod 1 and a wedge block 6 are driven to move upwards, the wedge block 6 is matched with a wedge surface on the inner side of a swing rod 3 to open the swing rod 3, and further bobbin grabbing is realized, and due to the arrangement of a spring rod 9 and a second spring 8, the problem of unsynchronized grabbing caused by tolerance of the inner wall of each bobbin can be avoided, and the bobbin grabbing of a plurality of bobbins is realized simultaneously; at the moment, the first spring 5 is in an extension state, and after the grabbing is completed, the tension of the first spring 5 can reset the swing rod 3.

In summary, the invention provides a synchronous internal-supporting multi-bobbin grabbing mechanism for automatic doffing of a roving frame, which realizes grabbing of bobbins without direct contact with yarns and can avoid damage to the yarns by stretching into spun bobbins for tightening and loosening. The bobbin grabbing device adopts the mode of the electric push rod to drive grabbing operation, the electric push rod is high in precision, the stroke can be controlled, grabbing work can be accurately and synchronously performed, grabbing efficiency is improved, the electric push rod is good in self-locking performance, the fact that the grabbing force is large enough to effectively grab bobbins is guaranteed, and grabbing work can be normally performed. The whole mechanism is simple, and the manufacturing cost is lower. The mechanism has fewer parts and high reliability, so that the maintenance cost is greatly reduced.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.