CN215624730U

CN215624730U - Automatic bar feeding device

Info

Publication number: CN215624730U
Application number: CN202121865812.4U
Authority: CN
Inventors: 何珊; 李振勇; 王俊
Original assignee: Beijing Huahai Machinery Co ltd
Current assignee: Beijing Huahai Machinery Co ltd
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2022-01-25
Anticipated expiration: 2031-08-10

Abstract

The application relates to the field of automatic processing equipment, in particular to an automatic bar feeding device which comprises a bracket, a driving mechanism arranged on the bracket, a transmission mechanism arranged in the bracket and a feeding mechanism arranged in the bracket; the feeding mechanism comprises two fixed racks and two movable racks, the fixed racks are fixedly connected to the support, the driving mechanism drives the transmission mechanism to move, and the movable racks reciprocate in the support in the vertical direction under the transmission of the transmission mechanism. This application has the effect that improves the feed efficiency of round bar.

Description

Automatic bar feeding device

Technical Field

The application relates to the field of automatic processing equipment, in particular to an automatic bar feeding device.

Background

At present, when a chain is produced and processed in a chain machine factory, for improving the processing automation degree and improving the production efficiency, a round bar required by a chain to be produced is conveyed into an inclined tray of the chain knitting machine by using a magnetic crane, and then the round bar rolls down to a material pushing groove of the chain knitting machine under the action of gravity.

According to the related technology, when the magnetic force crane adsorbs the round bars, part of the round bars are easily magnetized, and the round bars are easily adsorbed together, so that the round bars are not easy to roll in the tray or slowly roll down in the direction of the material pushing groove, and the feeding efficiency of the round bars is influenced.

SUMMERY OF THE UTILITY MODEL

In order to improve the feed efficiency of round bar material, this application provides a bar material automatic feeding.

The application provides a bar automatic feeding adopts following technical scheme:

an automatic bar feeding device comprises a bracket, a driving mechanism arranged on the bracket, a transmission mechanism arranged in the bracket and a feeding mechanism arranged in the bracket; the feeding mechanism comprises two fixed racks and two movable racks, the fixed racks are fixedly connected to the support, the driving mechanism drives the transmission mechanism to move, and the movable racks reciprocate in the support in the vertical direction under the transmission of the transmission mechanism.

Through adopting above-mentioned technical scheme, fixed rack fixed connection is in the support, and the moving rack is reciprocating motion in support inside, and the relative fixed rack of moving rack takes place the motion, makes the part magnetization round bar separation of erectting between the fixed rack through the mutual motion between moving rack and the fixed rack, later moves the rack through the reciprocating motion along vertical direction, drives the round bar and removes to the direction of feed, has weakened the influence of magnetization to the round bar feeding, has improved the feed efficiency of round bar.

Optionally, the two fixed racks are respectively and fixedly connected to two sides of the bracket, the two movable racks are located between the two fixed racks, the movable racks are parallel to the fixed racks, and the movable racks and the fixed racks are located at the same horizontal height in an initial state.

By adopting the technical scheme, the movable racks are positioned between the fixed racks, when the round bar stock is erected between the fixed racks, the two movable racks are symmetrical about the central position of the round bar stock, the two fixed racks are symmetrical about the central position of the round bar stock, and the round bar stock is erected between the fixed racks and is not easy to deflect, so that the round bar stock is more stably erected; the movable rack and the fixed rack are parallel to each other and located at the same horizontal height in the initial state, so that the tops of the movable rack and the fixed rack are more uniform when being abutted to round bars, the round bars are more stably erected, accidents are not prone to occurring when the round bars are fed to the chain knitting machine, and feeding efficiency is further influenced.

Optionally, the driving mechanism includes a driving shaft set and a motor, the driving shaft set includes a first driving shaft and a second driving shaft, the first driving shaft and the second driving shaft are respectively and vertically and fixedly connected to two ends of the movable rack, the motor drives the first driving shaft and the second driving shaft to synchronously rotate under the action of the transmission mechanism, and the movable rack is driven by the first driving shaft and the second driving shaft to reciprocate along the vertical direction under the transmission of the transmission mechanism.

Through adopting above-mentioned technical scheme, first drive shaft and second drive shaft perpendicular fixed connection respectively in the both ends of moving the rack for when moving along vertical direction, the both ends that move the rack can synchronous motion, make and move rack motion more steady, reduce the round bar because the slope of moving rack both ends takes place the possibility that rolls, make the feeding more stable, improve feeding efficiency.

Optionally, the first driving shaft and the second driving shaft are respectively rotatably connected to two ends of the bracket, the first driving shaft includes a first main shaft, the second driving shaft includes a second main shaft, and an output shaft of the motor is fixedly connected to the first main shaft; the transmission mechanism comprises a driving assembly and a reciprocating assembly, the driving assembly enables a first driving shaft and a second driving shaft to synchronously move, the first driving shaft is connected to one ends of the two movable racks through the reciprocating assembly, and the second driving shaft is connected to the other ends of the two movable racks through the reciprocating assembly.

Through adopting above-mentioned technical scheme, the motor drives first drive shaft and rotates inside the support, and transmission assembly connects between first drive shaft and second drive shaft for first drive shaft and second drive shaft keep synchronous motion, two both ends of removing the rack that go up and down jointly, make to remove the rack and steadily go up and down, and the lift in-process reduces the possibility that round bar material takes place to roll off, makes the feeding more stable, improves feeding efficiency.

Optionally, the driving assembly includes two belt wheels and a belt, and the two belt wheels are respectively penetrated and fixedly connected to one end of the first main shaft at the same side as the second main shaft; the belt is wound between the two belt wheels and drives the two belt wheels to synchronously rotate.

Through adopting above-mentioned technical scheme, the combination of band pulley and belt has reached the transmission purpose for the rotation of first drive shaft drives the second drive shaft and takes place to rotate, has realized the synchronous rotation of first drive shaft and second drive shaft.

Optionally, the first driving shaft includes a first main shaft, a first eccentric shaft, and a first balance block for balancing mass distribution of the first driving shaft, the first eccentric shaft is fixedly connected to the first main shaft through the first balance block, the first eccentric shaft is parallel to the first main shaft, and an axis of the first eccentric shaft deviates from an axis of the first main shaft; the second driving shaft comprises a second main shaft, a second eccentric shaft and a second balance block for balancing the mass distribution of the second driving shaft, the second eccentric shaft is fixedly connected with the second main shaft through the second balance block, the second eccentric shaft is arranged in parallel with the second main shaft, and the axis of the second eccentric shaft deviates from the axis of the second main shaft; the initial positions of the first eccentric shaft and the second eccentric shaft are consistent, and the initial positions of the first balance weight and the second balance weight are consistent; the number of the reciprocating components is two, and the two reciprocating components are driven by the first eccentric shaft and the second eccentric shaft to do reciprocating motion respectively.

By adopting the technical scheme, the first balance weight enables the first driving shaft to be difficult to deflect when rotating, the second balance weight enables the second driving shaft to be difficult to deflect when rotating, the initial positions of the first eccentric shaft and the second eccentric shaft are consistent, the initial positions of the first balance weight and the second balance weight are consistent, and the first eccentric shaft and the second eccentric shaft are always located at the same height when the first driving shaft and the second driving shaft rotate.

Optionally, reciprocal subassembly is including rotating the synchronizing bar of connecting in the limiting plate of the limiting plate and fixed connection between two removal racks of driving shaft group, connecting rod, fixed connection in the support, two the one end of rotary rod rotates respectively to be connected in first eccentric shaft and second eccentric shaft, the vertical setting of connecting rod, connecting rod pass and sliding connection in limiting plate, and connecting rod one end articulates in the other end of rotary rod, the other end fixed connection of connecting rod in the synchronizing bar.

By adopting the technical scheme, the synchronous rod enables the two movable racks to be connected, the two movable racks can keep synchronous motion, the rotary rod rotates along with the first eccentric shaft or the second eccentric shaft, the motion of the driving shaft group is transmitted to the connecting rod, the limiting plate limits the connecting rod to move only in the vertical direction, and the connecting rod is fixedly connected with the synchronous rod, so that the movable racks move in the vertical direction, and the synchronous rod can move in the vertical direction because the first eccentric shaft and the second eccentric shaft are located at the same relative position.

Optionally, the upper surface of the movable rack and the upper surface of the fixed rack are both provided with feeding teeth, and the feeding teeth on the upper surface of the movable rack and the feeding teeth on the upper surface of the fixed rack are arranged in a staggered manner.

Through adopting above-mentioned technical scheme, when removing the rack motion and fixing the rack same height, can be with the round bar separation of adhesion because of the magnetization, the round bar feeding of being convenient for, the dislocation feeds the tooth and can alternately promote the round bar and remove to the feeding direction, when reducing the round bar and receiving the influence of magnetization adhesion, also can improve feeding efficiency.

To sum up, this application includes following at least a bar automatic feeding device beneficial technical effect:

1. according to the feeding device, the moving rack moves along the vertical direction, and the fixed rack is fixedly connected with the bracket, so that the round bar moves more stably in the feeding direction, and the feeding efficiency is improved;

2. this application is through the mode that the tooth dislocation set was fed to the tooth of feeding of removal rack upper surface and fixed rack upper surface, with round bar jack-up, can weaken because of the unable roll influence that brings of part magnetization round bar adsorbs each other.

Drawings

Fig. 1 is a schematic structural view of an automatic bar feeding device in an embodiment of the present application;

FIG. 2 is a schematic structural view of an automatic bar feeding device according to an embodiment of the present application after a bracket is removed;

FIG. 3 is a schematic view of the drive mechanism;

fig. 4 is a schematic view of the structure intended to emphasize the feed tooth offset arrangement.

Description of reference numerals: 1. a support; 11. fixing the rod; 2. a drive mechanism; 21. a drive shaft group; 211. a first drive shaft; 2111. a first main shaft; 2112. a first eccentric shaft; 2113. a first weight; 212. a second drive shaft; 2121. a second main shaft; 2122. a second eccentric shaft; 2123. a second weight; 22. a motor; 3. a transmission mechanism; 31. a driving component; 311. a pulley; 312. a belt; 32. a reciprocating assembly; 321. rotating the rod; 322. a connecting rod; 323. a limiting plate; 324. a synchronization lever; 4. a feeding mechanism; 41. fixing a rack; 42. moving the rack; 5. a feed tooth; 6. round bar stock.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses bar automatic feeding. Referring to fig. 1, the automatic bar feeding device comprises a support 1, a feeding mechanism 4 for feeding, a driving mechanism 2 mounted on the support 1, and a transmission mechanism 3 for transmitting the motion state of the driving mechanism 2. The feeding mechanism 4, the driving mechanism 2 and the transmission mechanism 3 are all arranged on the support 1, the driving mechanism 2 is connected with the feeding mechanism 4 through the transmission mechanism 3, the transmission mechanism 3 transmits power generated by the driving mechanism 2 to the feeding mechanism 4, and the feeding mechanism 4 pushes the round bar 6 towards the feed inlet of the chain knitting machine.

Referring to fig. 2 and 3, the driving mechanism 2 includes a driving shaft set 21 and a motor 22, the driving shaft set 21 includes a first driving shaft 211 and a second driving shaft 212 disposed at two ends of the bracket 1, and both the first driving shaft 211 and the second driving shaft 212 are rotatably connected to an inner wall of the bracket 1. First drive shaft 211 includes a first main shaft 2111, a first eccentric shaft 2112, and a first weight 2113, the number of first eccentric shafts 2112 being one, and the number of first main shafts 2111 and first weights 2113 being two. The two first main shafts 2111 and the first eccentric shafts 2112 are fixedly connected through two first weights 2113, the two first weights 2113 are arranged oppositely, and the two first weights 2113 make the rotating center of gravity of the first driving shaft 211 positioned on the axes of the two first main shafts 2111. The two first main shafts 2111 are located on the same straight line, one ends of the two first main shafts 2111 are respectively and rotatably connected to the inner walls of the two sides of the bracket 1, and the other ends of the two first main shafts 2111 are fixedly connected to the side edges of the two first balance blocks 2113, which are away from each other. The first eccentric shaft 2112 is fixedly connected between the two first weights 2113, and the first eccentric shaft 2112 is positioned at the edge of the first weight 2113 away from the first main shaft 2111; the motor 22 is fixedly connected to the outer wall of the bracket 1, and an output shaft of the motor 22 may be fixedly connected to one end of the first main shaft 2111 by using a coupling.

Motor 22 can drive first drive shaft 211 and take place the rotation, and first balancing piece 2113 makes first drive shaft 211 be difficult for taking place the deflection when taking place the rotation, and first eccentric shaft 2112 can drive the object that is connected on first eccentric shaft 2112 and make reciprocating motion when first drive shaft 211 rotates.

Further, second drive shaft 212 includes a second main shaft 2121, a second eccentric shaft 2122, and a second weight 2123, second main shaft 2121 being identical to first main shaft 2111, second eccentric shaft 2122 being identical to first eccentric shaft 2112, and second weight 2123 being identical to first weight 2113. The second eccentric shaft 2122 is one in number, and the second main shaft 2121 and the second weight 2123 are two in number. The two second main shafts 2121 and the second eccentric shafts 2122 are fixedly connected by two second weights 2123, the two second weights 2123 are disposed opposite to each other, and the two second weights 2123 make the center of gravity of rotation of the second driving shaft 212 located on the axis of the two second main shafts 2121. The two second main shafts 2121 are located on the same straight line, one end of each of the two second main shafts 2121 is rotatably connected to the inner walls of the two sides of the bracket 1, and the other end of each of the two second main shafts 2121 is fixedly connected to one side edge of the two second weights 2123 which are away from each other. Second eccentric shaft 2122 is fixedly coupled between two second weights 2123, and second eccentric shaft 2122 is located at an edge of second weight 2123 away from second main shaft 2121. Initial positions of first weight 2113 and second weight 2123 are the same, and initial positions of first eccentric shaft 2112 and second eccentric shaft 2122 are the same.

The second weight 2123 makes the second driving shaft 212 not easily deflect when rotating, and the second eccentric shaft 2122 can drive the object connected to the second eccentric shaft 2122 to reciprocate when the second driving shaft 212 rotates. Initial positions of first weight 2113 and second weight 2123 are the same, and initial positions of first eccentric shaft 2112 and second eccentric shaft 2122 are the same, which are the basis for synchronous motion of first eccentric shaft 2112 and second eccentric shaft 2122.

Referring to fig. 1 and 2, the transmission mechanism 3 includes a driving assembly 31, the driving assembly 31 enables the first driving shaft 211 and the second driving shaft 212 to move synchronously, the driving assembly 31 includes belt wheels 311 and a belt 312, the belt wheels 311 are located inside the bracket 1, the number of the belt wheels 311 is multiple, the number of the belt wheels 311 is two in the embodiment of the present application, the two belt wheels 311 are respectively penetrated and fixedly connected to one end of the first main shaft 2111 and one end of the second main shaft 2121 on the same side, the belt wheel 311 located on the first main shaft 2111 is close to the motor 22, the belt 312 is wound between the two belt wheels 311, the first driving shaft 211 and the second driving shaft 212 are driven to rotate synchronously, and the first eccentric shaft 2112 and the second eccentric shaft 2122 are always located at the same height.

Further, the transmission mechanism 3 further includes a reciprocating assembly 32, the reciprocating assembly 32 transmits the rotation of the driving shaft set 21 to the feeding mechanism 4, the number of the reciprocating assemblies 32 is plural, the number of the reciprocating assemblies 32 in the embodiment of the present application is two, the two reciprocating assemblies 32 are respectively connected to the first driving shaft 211 and the second driving shaft 212, and the reciprocating assembly 32 includes a limiting plate 323 connected to the rotating rod 321, the connecting rod 322 and the bracket 1. One end of each of the two rotating rods 321 is rotatably connected to the first eccentric shaft 2112 and the second eccentric shaft 2122, the other end of each of the two rotating rods 321 is hinged to one end of the connecting rod 322, the connecting rod 322 is vertically arranged, the two limiting plates 323 are respectively located right above the first main shaft 2111 and the second main shaft 2121 along the direction of the first main shaft 2111, the two limiting plates 323 are fixedly connected to the inner wall of the support 1, and the other end of the connecting rod 322 penetrates through the limiting plate 323.

When the first eccentric shaft 2112 or the second eccentric shaft 2122 rotates, the rotating rod 321 reciprocates along with the first eccentric shaft 2112 or the second eccentric shaft 2122 to drive the connecting rod 322 to move, and the limiting plate 323 enables the connecting rod 322 to move only in the vertical direction.

Referring to fig. 1 and 2, the feeding mechanism 4 is installed inside the bracket 1, the feeding mechanism 4 includes a fixed rack 41 and a moving rack 42, the fixed rack 41 and the moving rack 42 are both horizontally disposed and located at the same height, the fixed rack 41 and the moving rack 42 are both parallel to the side surface of the bracket 1, and the fixed rack 41 and the moving rack 42 are disposed above the limiting plate 323 along a direction perpendicular to the first main shaft 2111. The number of the fixed racks 41 and the number of the moving racks 42 are plural, and the number of the fixed racks 41 and the number of the moving racks 42 are two in the embodiment of the present application, and the two moving racks 42 are located between the two fixed racks 41.

Further, support 1 is provided with dead lever 11, and the quantity of dead lever 11 is a plurality of, and the quantity of dead lever 11 is four in this application embodiment, and fixed rack 41's both ends difference fixed connection is in the one end of a dead lever 11, and the other end fixed connection of dead lever 11 is in the inside wall of support 1. Two fixed racks 41 are fixedly connected to two sides inside the bracket 1 through the fixing rod 11, and a gap exists between the fixed racks 41 and the side wall of the bracket 1, so that the round bar 6 can be erected between the fixed racks 41.

A movement space exists between the movable rack 42 and the fixed rack 41, a movement space exists between the fixed rack 41 and the bracket 1, and the fixed rack 41 and the movable rack 42 are parallel to each other and are located at the same horizontal height, so that the round bar stock 6 is more stable when being erected between the feeding mechanisms 4.

Further, the two movable racks 42 integrally reciprocate between the fixed racks 41 in the vertical direction, the reciprocating assembly 32 further includes a synchronization rod 324, the two movable racks 42 are connected by the synchronization rod 324, the two synchronization rods 324 are fixedly connected between the two movable racks 42, the two synchronization rods 324 are respectively located at two ends of the movable racks 42, one end of the connection rod 322, which is far away from the rotation rod 321, is fixedly connected with the center of the synchronization rod 324, and drives the synchronization rod 324 and the two movable racks 42 to reciprocate in the vertical direction.

Referring to fig. 2 and 4, the top of the fixed rack 41 and the top of the moving rack 42 are provided with feeding teeth 5 having the same tooth form, a face of the feeding teeth 5 facing the first driving shaft 211 is perpendicular to the top of the fixed rack 41 and the top of the moving rack 42, and a face of the feeding teeth 5 facing the second driving shaft 212 forms an acute angle with a face of the feeding teeth 5 facing the first driving shaft 211. The feeding teeth 5 are uniformly distributed on the upper surface of the fixed rack 41, the feeding teeth 5 are uniformly distributed on the upper surface of the movable rack 42, and the distance between the feeding teeth 5 and the feeding teeth 5 is equal to the diameter of the round bar stock 6. The top of the feeding teeth 5 at the top of the fixed rack 41 is located at a position intermediate adjacent feeding teeth 5 of the moving rack 42 near the first driving shaft 211. When the movable rack 42 and the fixed rack 41 of the round bar 6 are at the same height, the top of the feeding gear 5 abuts against the position of the round bar 6 deviating from the center of the circular section, the movable rack 42 continues to move, the round bar 6 rolls in the feeding direction under the action of the feeding gear 5, and when the round bar 6 at the inner circle part is stuck together due to the magnetization and cannot roll, the feeding gear 5 can separate the stuck round bars 6, so that the round bar 6 can roll.

The implementation principle of the automatic bar feeding device in the embodiment of the application is as follows: firstly, a round bar stock 6 is erected between two fixed racks 41, the initial position of the round bar stock 6 is located at one end of the fixed racks 41 and one end of the movable rack 42 close to the first driving shaft 211, then the motor 22 is started, the first driving shaft 211 and the second driving shaft 212 start to rotate, the movable rack 42 reciprocates along the vertical direction, and the round bar stock 6 is jacked up at the feeding teeth 5 and moves along the feeding direction.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a bar automatic feeding which characterized in that: comprises a bracket (1), a driving mechanism (2) arranged on the bracket (1), a transmission mechanism (3) arranged in the bracket (1) and a feeding mechanism (4) arranged in the bracket (1); the feeding mechanism (4) comprises two fixed racks (41) and two movable racks (42), the fixed racks (41) are fixedly connected to the support (1), the driving mechanism (2) drives the transmission mechanism (3) to move, and the movable racks (42) reciprocate in the support (1) in the vertical direction under the transmission of the transmission mechanism (3).

2. The automatic bar feeding device according to claim 1, wherein: the two fixed racks (41) are respectively and fixedly connected to two sides of the support (1), the two movable racks (42) are located between the two fixed racks (41), the movable racks (42) and the fixed racks (41) are parallel to each other, and the movable racks (42) and the fixed racks (41) are located at the same horizontal height in an initial state.

3. The automatic bar feeding device according to claim 2, wherein: the driving mechanism (2) comprises a driving shaft group (21) and a motor (22), the driving shaft group (21) comprises a first driving shaft (211) and a second driving shaft (212), the first driving shaft (211) and the second driving shaft (212) are respectively and fixedly connected to two ends of the movable rack (42) in a perpendicular mode, the motor (22) drives the first driving shaft (211) and the second driving shaft (212) to rotate synchronously under the action of the transmission mechanism (3), and the movable rack (42) is driven by the first driving shaft (211) and the second driving shaft (212) to reciprocate in the vertical direction under the transmission of the transmission mechanism (3).

4. The automatic bar feeding device according to claim 3, wherein: the first driving shaft (211) and the second driving shaft (212) are respectively connected to two ends of the bracket (1) in a rotating mode, the first driving shaft (211) comprises a first main shaft (2111), the second driving shaft (212) comprises a second main shaft (2121), and an output shaft of the motor (22) is fixedly connected with the first main shaft (2111); the transmission mechanism (3) comprises a driving assembly (31) and a reciprocating assembly (32), wherein the driving assembly (31) enables a first driving shaft (211) and a second driving shaft (212) to move synchronously, the first driving shaft (211) is connected to one ends of the two moving racks (42) through the reciprocating assembly (32), and the second driving shaft (212) is connected to the other ends of the two moving racks (42) through the reciprocating assembly (32).

5. The automatic bar feeding device according to claim 4, wherein: the driving assembly (31) comprises two belt wheels (311) and a belt (312), wherein the two belt wheels (311) are respectively arranged in a penetrating manner and fixedly connected to one end of the first main shaft (2111) at the same side as the second main shaft (2121); the belt (312) is wound between the two belt wheels (311) and drives the two belt wheels (311) to rotate synchronously.

6. The automatic bar feeding device according to claim 5, wherein: the first driving shaft (211) comprises a first main shaft (2111), a first eccentric shaft (2112) and a first balance block (2113) for balancing the mass distribution of the first driving shaft (211), the first eccentric shaft (2112) is fixedly connected with the first main shaft (2111) through the first balance block (2113), the first eccentric shaft (2112) is arranged in parallel with the first main shaft (2111), and the axis of the first eccentric shaft (2112) deviates from the axis of the first main shaft (2111); the second driving shaft (212) comprises a second main shaft (2121), a second eccentric shaft (2122) and a second balance block (2123) for balancing the mass distribution of the second driving shaft (212), the second eccentric shaft (2122) is fixedly connected with the second main shaft (2121) through the second balance block (2123), the second eccentric shaft (2122) is arranged in parallel with the second main shaft (2121), and the axis of the second eccentric shaft (2122) is deviated from the axis of the second main shaft (2121); the initial positions of the first eccentric shaft (2112) and the second eccentric shaft (2122) are consistent, and the initial positions of the first counterweight (2113) and the second counterweight (2123) are consistent; the number of the reciprocating components (32) is two, and the two reciprocating components (32) are driven by the first eccentric shaft (2112) and the second eccentric shaft (2122) to do reciprocating motion respectively.

7. The automatic bar feeding device according to claim 6, wherein: reciprocating assembly (32) including rotate connect in rotary rod (321), connecting rod (322) of driving shaft group (21), fixed connection in limiting plate (324) of support (1) and fixed connection in two synchronizing bar (325) between removing rack (42), two the one end of rotary rod (321) rotates respectively and connects in first eccentric shaft (2112) and second eccentric shaft (2122), connecting rod (322) vertical setting, connecting rod (322) pass and sliding connection in limiting plate (323), and connecting rod (322) one end articulates in the other end of rotary rod (321), and the other end fixed connection of connecting rod (322) is in synchronizing bar (324).

8. The automatic bar feeding device according to claim 1, wherein: the feeding teeth (5) are arranged on the upper surface of the movable rack (42) and the upper surface of the fixed rack (41), and the feeding teeth (5) on the upper surface of the movable rack (42) and the feeding teeth (5) on the upper surface of the fixed rack (41) are arranged in a staggered mode.