Pull rod lifting feeding mechanism

Abstract

The utility model discloses a pull rod lifting feeding mechanism which comprises a pull rod stock bin used for containing a plurality of pull rods to be fed, the pull rods to be fed are stacked in the pull rod stock bin in M layers and N columns, and M and N are larger than or equal to 2; the pull rod lifting device is arranged at the bottom of the pull rod bin and used for driving the pull rod to be fed in the pull rod bin to ascend and descend; the first sensing device is arranged on the top of the pull rod bin and used for sensing whether the to-be-fed pull rod exists on the top of the pull rod bin or not and controlling the pull rod lifting device. The pull rod lifting feeding mechanism can achieve automatic feeding of pull rods.

Description

Technical Field

[0001] The utility model relates to the field of pull rod assembly, in particular to a pull rod lifting and feeding mechanism. Background Art

[0002] With the continuous development of science and technology and the continuous progress of society, people's living standards are also rapidly improving. When people need to travel far away or need to store some large items, in order to facilitate travel, they generally use trolley cases to store the things they need to go out. Therefore, trolley cases have been widely used by people.

[0003] However, in the existing market, the assembly of the trolley rods of trolley cases is generally semi-automated, where the trolley rods are manually fed one by one into the trolley rod assembly machine to complete the feeding of the trolley rods. The manual feeding of the trolley rods is not only inefficient, but also requires the hands to be close to the machine during feeding, which is easy to be damaged by the machine. Utility Model Content

[0004] In order to solve the above-mentioned deficiencies of the prior art, the utility model provides a pull rod lifting and feeding mechanism, which can realize automatic feeding of the pull rod.

[0005] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0006] A pull rod lifting and feeding mechanism, comprising:

[0007] A tie rod silo is used to place a plurality of tie rods to be loaded, wherein the plurality of tie rods to be loaded are stacked in M ​​layers and N rows in the tie rod silo, where M and N are ≥ 2;

[0008] A rod lifting device is arranged at the bottom of the rod silo and is used to drive the rods to be loaded in the rod silo to be lifted or lowered;

[0009] The first sensor device is arranged at the top of the tie rod silo, and is used to sense whether there is the tie rod to be loaded on the top of the tie rod silo and control the tie rod lifting device.

[0010] Furthermore, the tie rod silo includes a silo base, a first silo side wall and a second silo side wall, the first silo side wall and the second silo side wall are relatively arranged on the silo base along a first direction, the inner side of the first silo side wall is provided with a plurality of vertical grooves along a second direction, the inner side of the second silo side wall is also provided with a plurality of vertical grooves, the vertical grooves of the first silo side wall correspond to the vertical grooves of the second silo side wall, the two corresponding vertical grooves of the first silo side wall and the second silo side wall correspond to a row of tie rods to be loaded; when the tie rods to be loaded are placed in the tie rod silo, their two ends respectively extend into the corresponding two vertical grooves.

[0011] Furthermore, a hole structure is provided on the silo base, and the rod lifting device can extend from the hole structure into the rod silo to drive the rod to be loaded to be lifted or lowered.

[0012] Furthermore, the rod lifting device includes an upper fixed plate, a lower fixed plate, a lifting plate, a lifting drive and a plurality of vertical push rods, the lifting plate is located between the upper fixed plate and the lower fixed plate, the lifting drive is arranged on the lower fixed plate and its output end is connected to drive the lifting plate to lift and lower between the upper fixed plate and the lower fixed plate; the vertical push rod passes through the upper fixed plate, one end of which is connected to the lifting plate, and the other end faces the rod silo; when the lifting drive drives the lifting plate to rise, a plurality of vertical push rods extend from the hole structure at the bottom of the rod silo into the rod silo to push the rod to be loaded to rise, and when the lifting drive drives the lifting plate to descend, a plurality of vertical push rods extend from the hole structure at the bottom of the rod silo to the outside of the rod silo, and the rod to be loaded is lowered by its own gravity.

[0013] Furthermore, the multiple vertical push rods are divided into multiple push rod groups arranged in the second direction, and one push rod group corresponds to a row of pull rods to be loaded; each push rod group includes at least two vertical push rods arranged along the first direction; when the number of the hole structure is only one, the hole structure exposes all the pull rods to be loaded on the same layer, so that all the vertical push rods of the pull rod lifting device can pass through when raised; when the number of the hole structures is multiple, the multiple hole structures are divided into multiple through hole groups arranged in the second direction, one through hole group corresponds to a row of pull rods to be loaded, and each through hole group includes at least one hole structure.

[0014] Furthermore, the pull rod lifting device also includes a plurality of lifting guide rods, which are inserted into the lifting plate through lifting sleeves, one end of which is connected to the lower fixed plate, and the other end of which is connected to the upper fixed plate.

[0015] Furthermore, the first sensing device includes a first laser transmitter and a first laser receiver, and the first laser transmitter and the first laser receiver are respectively arranged on both sides of the top of the tie rod silo along the second direction.

[0016] Furthermore, the pull rod lifting and feeding mechanism also includes:

[0017] A loading table is provided with a loading station and a charging station along the second direction;

[0018] A silo moving device, disposed on the loading table, for connecting and driving the pull rod silo to move between the loading station and the charging station along a second direction;

[0019] A second sensing device is provided at the bottom of the tie rod silo, and is used to sense whether there is the tie rod to be loaded at the bottom of the tie rod silo and control the silo moving device;

[0020] The tie rod silo is arranged above the loading table, and the tie rod lifting device is arranged below the loading table and corresponds to the loading station; when the silo moving device drives the tie rod silo to move to the loading station, the tie rod silo is connected to the tie rod lifting device, and when the silo moving device drives the tie rod silo to move to the loading station, the tie rod silo is separated from the tie rod lifting device.

[0021] Furthermore, the silo moving device includes a movable guide rail, a movable slider group and a movable driver, the movable guide rail is arranged on the loading table and extends along the second direction, the movable slider group is arranged on the movable guide rail, and the pull rod silo is arranged on the movable slider group; the movable driver is connected to drive the pull rod silo to move along the second direction on the movable guide rail.

[0022] Furthermore, the second sensing device includes a second laser transmitter and a second laser receiver, and the second laser transmitter and the second laser receiver are respectively arranged on both sides of the bottom of the tie rod silo along the second direction.

[0023] The utility model has the following beneficial effects:

[0024] The drawbar lifting and loading mechanism of the utility model is used for the drawbar assembly machine of the drawbar box to realize the automatic loading of the drawbars. When in use, a plurality of drawbars to be loaded are first placed in the drawbar bin, so that the plurality of drawbars to be loaded are stacked in M ​​layers and N columns in the drawbar bin, and then the first sensor device senses whether the drawbars to be loaded are on the top of the drawbar bin. If it is sensed that the drawbars to be loaded do not exist on the top of the drawbar bin, the drawbar lifting device is controlled to drive the drawbars to be loaded in the drawbar bin to rise. If it is sensed that the drawbars to be loaded do not exist on the top of the drawbar bin, the drawbar lifting device is controlled to drive the drawbars to be loaded in the drawbar bin to rise. When loading the tie rods, the tie rod lifting device is controlled to suspend driving the tie rods to be loaded in the tie rod bin to lift up. In this way, when the robot arm of the tie rod assembly machine takes away the tie rods to be loaded at the top of the tie rod bin, the tie rod lifting device can automatically drive the tie rods to be loaded in the tie rod bin to lift up, so as to lift the topmost tie rods to be loaded to the top of the tie rod bin. Only after all the tie rods to be loaded in the tie rod bin are taken out and loaded, do they need to be manually put back into the tie rod bin to load the tie rods to be loaded, which greatly improves the loading efficiency of the tie rods.

[0025] The rod lifting and loading mechanism of the utility model sets a loading station and a charging station on the loading table, and then the second sensor device senses whether the rod to be loaded is present at the bottom of the rod bin. If it is sensed that the rod to be loaded is not present at the bottom of the rod bin, the bin moving device is controlled to drive the rod bin to move to the loading station for manual loading. If it is sensed that the rod to be loaded is present at the bottom of the rod bin, the bin moving device is controlled to drive the rod bin to move to the loading station for automatic loading. In this way, after all the rods to be loaded in the rod bin are taken up and loaded by the robot of the rod assembly machine, the bin moving device drives the rod bin to move from the loading station to the charging station, so that the rod bin is away from the rod assembly machine, and the rod to be loaded is then manually put back into the rod bin, thereby improving the safety of manual loading and avoiding injuries to the hands by the rod assembly machine during manual loading. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural schematic diagram of the pull rod lifting and feeding mechanism provided by the utility model.

[0027] Figure 2 The utility model provides an exploded schematic diagram of a pull rod silo in the pull rod lifting and feeding mechanism.

[0028] Figure 3 The utility model provides a structural schematic diagram of the pull rod lifting device in the pull rod lifting feeding mechanism.

[0029] Figure 4 This is a structural schematic diagram of the silo moving device in the pull rod lifting and loading mechanism provided by the utility model. DETAILED DESCRIPTION

[0030] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Embodiment 1

[0035] like Figure 1 As shown, a pull rod lifting and feeding mechanism comprises:

[0036] The tie rod silo 200 is used to place a plurality of tie rods a to be loaded, wherein the plurality of tie rods a to be loaded are stacked in M ​​layers and N rows in the tie rod silo 200, where M and N are ≥ 2;

[0037] A rod lifting device 300 is disposed at the bottom of the rod silo 200 and is used to drive the rod a to be loaded in the rod silo 200 to be lifted or lowered;

[0038] The first sensor device 400 is disposed at the top of the tie rod silo 200 , and is used to sense whether the tie rod a to be loaded is present at the top of the tie rod silo 200 and control the tie rod lifting device 300 .

[0039] The drawbar lifting and loading mechanism of the utility model is used for the drawbar assembly machine of the drawbar box to realize the automatic loading of the drawbars. When in use, a plurality of drawbars a to be loaded are first placed in the drawbar bin 200, so that the plurality of drawbars a to be loaded are stacked in M ​​layers and N columns in the drawbar bin 200, and then the first sensing device 400 senses whether the drawbar a to be loaded is on the top of the drawbar bin 200. If it is sensed that the drawbar a to be loaded is not on the top of the drawbar bin 200, the drawbar lifting device 300 is controlled to drive the drawbar a to be loaded in the drawbar bin 200 to rise. If it is sensed that the drawbar a to be loaded is on the top of the drawbar bin 200, the drawbar lifting device 300 is controlled to drive the drawbar a to be loaded in the drawbar bin 200 to rise. When the material pull rod a is taken out, the pull rod lifting device 300 is controlled to stop driving the pull rod a to be loaded in the pull rod silo 200 to rise. In this way, when the robot of the pull rod assembly machine takes away the pull rod a to be loaded at the top of the pull rod silo 200, the pull rod lifting device 300 can automatically drive the pull rod a to be loaded in the pull rod silo 200 to rise, so as to lift the topmost pull rod a to be loaded to the top of the pull rod silo 200. Only after all the pull rods a to be loaded in the pull rod silo 200 are taken out, it is necessary to manually put the pull rod a to be loaded into the pull rod silo 200 again, which greatly improves the loading efficiency of the pull rods.

[0040] like Figure 2 As shown, the rod silo 200 includes a silo base 210, a first silo side wall 220 and a second silo side wall 230, the first silo side wall 220 and the second silo side wall 230 are relatively arranged on the silo base 210 along the first direction X, the inner side of the first silo side wall 220 is provided with a plurality of vertical grooves 240 along the second direction Y, the inner side of the second silo side wall 230 is also provided with a plurality of vertical grooves 240, the vertical grooves 240 of the first silo side wall 220 correspond to the vertical grooves 240 of the second silo side wall 230, the two corresponding vertical grooves 240 of the first silo side wall 220 and the second silo side wall 230 correspond to a row of rods a to be loaded; when the rods a to be loaded are placed in the rod silo 200, their two ends extend into the corresponding two vertical grooves 240 respectively.

[0041] In this embodiment, the first direction X is perpendicular to the second direction Y.

[0042] The silo base 210 is provided with a hole structure 250 , and the rod lifting device 300 can extend from the hole structure 250 into the rod silo 200 to drive the rod a to be loaded to be lifted or lowered.

[0043] like Figure 3As shown, the rod lifting device 300 includes an upper fixed plate 310, a lower fixed plate 320, a lifting plate 330, a lifting driver 340 and a plurality of vertical push rods 350. The lifting plate 330 is located between the upper fixed plate 310 and the lower fixed plate 320. The lifting driver 340 is arranged on the lower fixed plate 320 and its output end is connected to drive the lifting plate 330 to lift between the upper fixed plate 310 and the lower fixed plate 320. The vertical push rod 350 passes through the upper fixed plate 310, and one end of the vertical push rod 350 is connected to the lifting driver 340. The lifting plate 330 has one end and the other end faces the rod silo 200; when the lifting drive 340 drives the lifting plate 330 to rise, a plurality of vertical push rods 350 extend from the hole structure 250 at the bottom of the rod silo 200 into the rod silo 200 to push the rod a to be loaded to rise; when the lifting drive 340 drives the lifting plate 330 to fall, a plurality of vertical push rods 350 extend from the hole structure 250 at the bottom of the rod silo 200 to the outside of the rod silo 200, and the rod a to be loaded falls due to its own gravity.

[0044] In this embodiment, the lifting driver 340 is a screw motor. Of course, other conventional drivers, such as a cylinder, etc., may also be used.

[0045] The plurality of vertical push rods 350 are divided into a plurality of push rod groups arranged in the second direction Y, one push rod group corresponds to a row of pull rods a to be loaded; each push rod group includes at least two vertical push rods 350 arranged along the first direction X. Preferably, one vertical push rod 350 in each push rod group corresponds to one end of the pull rod a to be loaded, and the other vertical push rod 350 corresponds to the other end of the pull rod a to be loaded.

[0046] The number of the hole structure 250 can be one or more; when the number of the hole structure 250 is only one, the size of the hole structure 250 should be large enough to expose all the pull rods a to be loaded on the same layer, so that all the vertical push rods 350 of the pull rod lifting device 300 can pass through when they are lifted; when the number of the hole structures 250 is multiple, the multiple hole structures 250 are also divided into multiple through-hole groups arranged along the second direction Y, one through-hole group corresponds to a column of pull rods a to be loaded, and each through-hole group includes at least one hole structure 250; if each through-hole group includes only one hole structure 250, the hole structure 250 extends along the first direction X to cover all the vertical push rods 350 of the corresponding push rod group, so that all the vertical push rods 350 of the corresponding push rod group can pass through when they are lifted; if each through-hole group includes multiple hole structures 250, the number of the hole structures 250 is consistent with the number of the vertical push rods 350, and one hole structure 250 corresponds to one vertical push rod 350.

[0047] The rod lifting device 300 further includes a plurality of lifting guide rods 360 , which are inserted into the lifting plate 330 via a lifting sleeve 370 , one end of which is connected to the lower fixed plate 320 , and the other end of which is connected to the upper fixed plate 310 .

[0048] In this embodiment, there are four groups of lifting guide rods 360 and lifting sleeves 370 , which are distributed on the four corners of the lifting plate 330 .

[0049] The first sensing device 400 includes a first laser transmitter 410 and a first laser receiver 420 , and the first laser transmitter 410 and the first laser receiver 420 are respectively disposed on both sides of the top of the tie rod silo 200 along the second direction Y.

[0050] like Figure 2 As shown, the first laser transmitter 410 is used to transmit a sensing laser to the first laser receiver 420. When the rod a to be loaded is present at the top of the rod bin 200, the sensing laser will be blocked by the rod a to be loaded and cannot reach the first laser receiver 420. When the rod a to be loaded is not present at the top of the rod bin 200, the sensing laser is not blocked by any object and can reach the first laser receiver 420. If the first laser receiver 420 receives the sensing laser, it controls the rod lifting device 300 to drive the rod a to be loaded in the rod bin 200 to rise. If the sensing laser is not received, it controls the rod lifting device 300 to pause driving the rod a to be loaded in the rod bin 200 to rise.

[0051] Embodiment 2

[0052] As an optimization solution of the first embodiment, in this embodiment, if Figure 1 As shown, the pull rod lifting and feeding mechanism also includes:

[0053] The loading table 100 is provided with a loading station and a loading station along the second direction Y;

[0054] The silo moving device 500 is disposed on the loading table 100 and is used to connect and drive the rod silo 200 to move along the second direction Y between the loading station and the charging station;

[0055] A second sensing device 600 is disposed at the bottom of the tie rod silo 200, and is used to sense whether there is the tie rod a to be loaded at the bottom of the tie rod silo 200 and control the silo moving device 500;

[0056] The tie rod silo 200 is arranged above the loading table 100, and the tie rod lifting device 300 is arranged below the loading table 100 and corresponds to the loading station; when the silo moving device 500 drives the tie rod silo 200 to move to the loading station, the tie rod silo 200 is connected to the tie rod lifting device 300, and when the silo moving device 500 drives the tie rod silo 200 to move to the loading station, the tie rod silo 200 is separated from the tie rod lifting device 300.

[0057] The rod lifting and loading mechanism of the utility model is provided with a loading station and a loading station on the loading table 100, and then the second sensing device 600 senses whether there is the rod a to be loaded at the bottom of the rod bin 200. If it is sensed that there is no rod a to be loaded at the bottom of the rod bin 200, the bin moving device 500 is controlled to drive the rod bin 200 to move to the loading station for manual loading. If it is sensed that there is the rod a to be loaded at the bottom of the rod bin 200, the bin moving device 500 is controlled to drive the rod bin 200 to move to the loading station for manual loading. 0 drives the tie rod bin 200 to move to the loading station for automatic loading. In this way, after all the tie rods a to be loaded in the tie rod bin 200 are taken up by the robot of the tie rod assembly machine, the bin moving device 500 drives the tie rod bin 200 to move from the loading station to the loading station, so that the tie rod bin 200 is away from the tie rod assembly machine, and then the tie rods a to be loaded are manually put back into the tie rod bin 200, which improves the safety of manual loading and avoids damage to the hands by the tie rod assembly machine during manual loading.

[0058] like Figure 4 The silo moving device 500 includes a moving guide rail 510, a moving slider group 520 and a moving driver 530. The moving guide rail 510 is arranged on the loading table 100 and extends along the second direction Y. The moving slider group 520 is arranged on the moving guide rail 510. The pull rod silo 200 is arranged on the moving slider group 520. The moving driver 530 is connected to drive the pull rod silo 200 to move along the second direction Y on the moving guide rail 510.

[0059] In this embodiment, the moving driver 530 is a cylinder, and other conventional drivers may also be used, such as a screw motor, etc. There are two groups of moving guide rails 510 and moving slider groups 520, which are distributed along the first direction X on both sides of the loading station and the charging station.

[0060] like Figure 2The second sensing device 600 includes a second laser transmitter 610 and a second laser receiver 620 , and the second laser transmitter 610 and the second laser receiver 620 are respectively arranged on both sides of the bottom of the tie rod silo 200 along the second direction Y.

[0061] The second laser transmitter 610 is used to transmit a sensing laser to the second laser receiver 620. When the rod a to be loaded is present at the bottom of the rod silo 200, the sensing laser will be blocked by the rod a to be loaded and cannot reach the second laser receiver 620420. When the rod a to be loaded is not present at the bottom of the rod silo 200, the sensing laser is not blocked by any object and can reach the second laser receiver 620. If the second laser receiver 620 receives the sensing laser, it controls the silo moving device 500 to drive the rod silo 200 to move to the loading station. If the sensing laser is not received, it controls the silo moving device 500 to drive the rod silo 200 to move to the loading station.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the utility model rather than to limit them. Although the embodiments of the utility model are described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the embodiments of the utility model can still be modified or replaced by equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A pull rod lifting and feeding mechanism, characterized in that: include: A tie rod silo is used to place a plurality of tie rods to be loaded, wherein the plurality of tie rods to be loaded are stacked in M ​​layers and N rows in the tie rod silo, where M and N are ≥ 2; A rod lifting device is arranged at the bottom of the rod silo and is used to drive the rods to be loaded in the rod silo to be lifted or lowered; The first sensor device is arranged at the top of the tie rod silo, and is used to sense whether there is the tie rod to be loaded on the top of the tie rod silo and control the tie rod lifting device.

2. The pull rod lifting and feeding mechanism according to claim 1, characterized in that: The tie rod silo includes a silo base, a first silo side wall and a second silo side wall, the first silo side wall and the second silo side wall are arranged on the silo base relatively along a first direction, the inner side of the first silo side wall is provided with a plurality of vertical grooves along a second direction, the inner side of the second silo side wall is also provided with a plurality of vertical grooves, the vertical grooves of the first silo side wall correspond to the vertical grooves of the second silo side wall, the two corresponding vertical grooves of the first silo side wall and the second silo side wall correspond to a row of tie rods to be loaded; when the tie rods to be loaded are placed in the tie rod silo, their two ends respectively extend into the corresponding two vertical grooves.

3. The pull rod lifting and feeding mechanism according to claim 2 is characterized in that: A hole structure is provided on the silo base, and the rod lifting device can extend from the hole structure into the rod silo to drive the rod to be loaded to be lifted or lowered.

4. The pull rod lifting and feeding mechanism according to claim 2 or 3, characterized in that: The rod lifting device comprises an upper fixed plate, a lower fixed plate, a lifting plate, a lifting drive and a plurality of vertical push rods, wherein the lifting plate is located between the upper fixed plate and the lower fixed plate, the lifting drive is arranged on the lower fixed plate and its output end is connected to drive the lifting plate to lift between the upper fixed plate and the lower fixed plate; the vertical push rod passes through the upper fixed plate, one end of which is connected to the lifting plate, and the other end faces the rod silo; When the lifting drive drives the lifting plate to rise, multiple vertical push rods extend from the hole structure at the bottom of the rod silo into the rod silo to push the rod to be loaded to rise; when the lifting drive drives the lifting plate to fall, multiple vertical push rods extend from the hole structure at the bottom of the rod silo to the outside of the rod silo, and the rod to be loaded is lowered by its own gravity.

5. The pull rod lifting and feeding mechanism according to claim 4, characterized in that: The multiple vertical push rods are divided into multiple push rod groups arranged in the second direction, and one push rod group corresponds to a column of pull rods to be loaded; each push rod group includes at least two vertical push rods arranged along the first direction; when the number of the hole structure is only one, the hole structure exposes all the pull rods to be loaded on the same layer, so that all the vertical push rods of the pull rod lifting device can pass through when raised; when the number of the hole structures is multiple, the multiple hole structures are divided into multiple through hole groups arranged in the second direction, one through hole group corresponds to a column of pull rods to be loaded, and each through hole group includes at least one hole structure.

6. The pull rod lifting and feeding mechanism according to claim 4, characterized in that: The pull rod lifting device also includes a plurality of lifting guide rods, which are inserted into the lifting plate through lifting sleeves, one end of which is connected to the lower fixed plate, and the other end of which is connected to the upper fixed plate.

7. The pull rod lifting and feeding mechanism according to claim 1, characterized in that: The first sensing device includes a first laser transmitter and a first laser receiver, and the first laser transmitter and the first laser receiver are respectively arranged on both sides of the top of the tie rod silo along the second direction.

8. The pull rod lifting and feeding mechanism according to claim 1, characterized in that: The pull rod lifting and feeding mechanism also includes: A loading table is provided with a loading station and a charging station along the second direction; A silo moving device, disposed on the loading table, for connecting and driving the pull rod silo to move between the loading station and the charging station along a second direction; A second sensing device is disposed at the bottom of the tie rod silo, and is used to sense whether there is the tie rod to be loaded at the bottom of the tie rod silo and control the silo moving device; The tie rod silo is arranged above the loading table, and the tie rod lifting device is arranged below the loading table and corresponds to the loading station; when the silo moving device drives the tie rod silo to move to the loading station, the tie rod silo is connected to the tie rod lifting device, and when the silo moving device drives the tie rod silo to move to the loading station, the tie rod silo is separated from the tie rod lifting device.

9. The pull rod lifting and feeding mechanism according to claim 8, characterized in that: The silo moving device includes a moving guide rail, a moving slider group and a moving driver. The moving guide rail is arranged on the loading table and extends along the second direction. The moving slider group is arranged on the moving guide rail. The pull rod silo is arranged on the moving slider group. The moving driver is connected to drive the pull rod silo to move along the second direction on the moving guide rail.

10. The pull rod lifting and feeding mechanism according to claim 8, characterized in that: The second sensing device includes a second laser transmitter and a second laser receiver, and the second laser transmitter and the second laser receiver are respectively arranged on both sides of the bottom of the tie rod silo along the second direction.

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