Stepped push rod mechanism

Abstract

The invention discloses a stepped push rod mechanism, and relates to the technical field of push rod lifting, the push rod structure comprises a plurality of fixing plates, and the fixing plates are installed on a push rod counting machine; the material pushing assembly can do reciprocating motion, a plurality of driven plates are arranged on the material pushing assembly, and the driven plates are located in the gaps between every two adjacent fixing plates. According to the stepped push rod mechanism, the push-pull force of the air cylinder is transmitted to the stepped push rod mechanism through the adjusting assembly, the adjusting assembly needs to slide for a certain distance in the sleeve to make contact with the stepped push rod mechanism in the moving process, and the characteristic is utilized, so that the movement amplitude of the stepped push rod mechanism driven by the air cylinder is changed; the threaded column is adopted as a connecting structure of the upper positioning column and the lower positioning column, the distance between the upper positioning column and the lower positioning column can be adjusted in a rotating mode, and therefore the length of the adjusting assembly is changed, the lifting amplitude of the stepped push rod mechanism can be adjusted conveniently, and the applicability of the device is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of push rod lifting, in particular to a stepped push rod mechanism. BACKGROUND

[0002] The push rod counting machine refers to a machine that can uniformly, regularly and continuously feed rod-shaped workpieces of different lengths from a feeding table to a conveying table in the production process. In use, the push rod counting machine realizes the lifting of parts through the internal stepped push rod mechanism, and counts by using a counter during the lifting process, thereby combining counting and lifting to improve the compactness of the overall structure.

[0003] At present, the Chinese patent with patent application number "CN201911085817.2" discloses a stepped feeder, which comprises a rack, a reciprocating material pushing module, a fixed baffle module and a storage module. The reciprocating material pushing module is arranged on the rack and comprises a first push plate, a second push plate, a third push plate, a fourth push plate, a movable bottom plate, a cam follower, a crank and a motor. The first to fourth push plates are connected with the movable bottom plate through fixed blocks. The motor is connected with the crank through a shaft. The crank is provided with a cam follower. The cam follower is arranged on the sliding groove of the movable bottom plate. The fixed baffle module comprises a first fixed baffle, a second fixed baffle, a third fixed baffle and a fourth fixed baffle. The first to fourth fixed baffles are arranged in a staggered manner with the first to fourth push plates to form a stepped shape. The storage module is arranged at the first push plate. Although the patent can lift raw material parts from the storage area to the top of the feeder step by step, it cannot be applied to the transportation of raw materials of different diameters or different quantities due to the fixed lifting range of the reciprocating material pushing module inside.

[0004] However, during the implementation of the above technical solution, at least the following technical problems are found:

[0005] Poor adaptability and insufficient stability: the existing push rod counting machine, when in use, can lift rod-shaped workpieces by driving the stepped push rod mechanism with a fixed length through the cylinder, cooperating with the fixed and immovable fixed plate. Therefore, it can only lift one raw material at a time, which facilitates counting but seriously affects the efficiency of feeding. In addition, under the limitation of this fixed lifting mode, when counting or transporting workpieces of different diameters, it is very easy to malfunction. For example, the stepped push rod mechanism can just be lowered to a position 4 cm below the feeding table. At this time, the workpiece on the feeding table can accurately fall into the stepped push rod mechanism and be lifted with the stepped push rod mechanism. However, when the diameter of the workpiece to be transported becomes 5 cm or even larger, the raw material cannot be accurately and stably dropped onto the stepped push rod mechanism, so it cannot participate in the subsequent lifting action. This seriously limits the stability and applicability of the device and affects its application range. Therefore, we propose a stepped push rod mechanism. SUMMARY

[0006] (I) Technical problems solved

[0007] In view of the deficiencies in the prior art, the present application provides a stepped push rod mechanism to solve the technical problems of poor adaptability and insufficient stability of the existing push rod counting machine in use.

[0008] (II) Technical solutions

[0009] To achieve the above object, the present application is implemented by the following technical solutions:

[0010] A stepped push rod mechanism is installed on a push rod counting machine, and the push rod mechanism comprises:

[0011] A plurality of fixed plates arranged in a stepped manner, and the fixed plates are installed on the push rod counting machine;

[0012] A push assembly capable of reciprocating motion, provided with a plurality of driven plates, and the driven plates are located in the gap between adjacent two fixed plates, capable of lifting the position of the push rod;

[0013] Wherein, the driven plate and the fixed plate are both inclinedly arranged, a plurality of the driven plates are arranged in a stepped manner, and a plurality of the driven plates move synchronously, in the lifting process of the driven plate, the push rod can alternately roll to the end of the driven plate or the end of the fixed plate under the action of its own gravity.

[0014] Preferably, the push assembly comprises an inclined movable plate, and a plurality of the driven plates are arranged on the movable plate in sequence, the movable plate is lifted under the driving of the back cylinder of the movable plate, and the lifting direction is consistent with the extension direction of the movable plate.

[0015] Preferably, the push assembly further comprises two parallel positioning plates, and a guide rod is connected between the two positioning plates, and the guide rod is inserted with the sliding block at the back of the movable plate;

[0016] Wherein, a group of springs is arranged at both ends of the sliding block, and the springs are sleeved outside the guide rod, when the sliding block is not affected by the cylinder thrust, the sliding block is located at the middle position of the guide rod.

[0017] Preferably, the end of the cylinder is connected with an adjusting assembly, and the cylinder is inserted with a sleeve on the mounting seat through the adjusting assembly, and the sleeve can slide between the two ends of the adjusting assembly;

[0018] Wherein, when the sleeve slides between the two ends of the adjusting assembly, the sleeve and the adjusting assembly slide relative to each other.

[0019] Preferably, the adjusting assembly comprises a positioning column, two sets of mutually opposite extrusion pins are arranged at the end of the positioning column, the extrusion pins are embedded in the positioning column and can slide in the positioning column, one magnet is embedded in the opposite end of each of the two extrusion pins, and the extrusion pins can move to the center of the positioning column under the action of the magnetic force of the magnet.

[0020] When the extrusion pins are unfolded, the ends of the extrusion pins extend out of the positioning column; when the extrusion pins are stored, the outer walls of the extrusion pins are flush with the outer wall of the positioning column.

[0021] Preferably, an outwardly extending guide groove is symmetrically arranged at the end of the positioning column, and a sliding groove is arranged on the inner wall of each side of the guide groove, and the extension direction of the sliding groove is perpendicular to the length direction of the positioning column.

[0022] The connecting shaft outside the extrusion pin is inserted into the sliding groove and can slide along the extension direction of the sliding groove.

[0023] Preferably, a limiting piece is inserted at the end of the positioning column, and the limiting piece is located between the two extrusion pins to limit the movement of the two extrusion pins.

[0024] The limiting piece comprises a pressing cap, and an extrusion column is arranged at the end of the pressing cap facing the positioning column, the extrusion column is inserted into the positioning column and can slide along the length direction of the positioning column, and the two extrusion pins are located on the two sides of the sliding path of the extrusion column.

[0025] Preferably, two reserved grooves and two storage grooves are symmetrically arranged on the outer wall of the extrusion column, and the reserved grooves are located above the storage grooves.

[0026] During the movement of the extrusion column, the reserved grooves and the pressing cap are driven to move up and down, when the reserved grooves move between the two extrusion pins, the ends of the extrusion pins extend out of the positioning column, and when the storage grooves move between the two extrusion pins, the ends of the extrusion pins are flush with the outer wall of the positioning column.

[0027] Preferably, the positioning column comprises a positioning upper column and a positioning lower column corresponding to each other, and a threaded column is arranged at the end of the positioning lower column facing the positioning upper column, the other end of the threaded column is inserted into the positioning upper column and is threadedly connected with the positioning upper column, and the distance between the positioning upper column and the positioning lower column can be adjusted by rotating the positioning upper column.

[0028] A plurality of sets of limiting strips are arranged on the inner wall of the sleeve and the outer walls of the positioning upper column and the positioning lower column, when the positioning upper column and the positioning lower column are inserted into the sleeve, the limiting strips on the outer walls of the positioning upper column and the positioning lower column engage with the limiting strips on the inner wall of the sleeve, thereby limiting the relative rotation of the positioning upper column and the positioning lower column.

[0029] Preferably, the sum of the lengths of the lower positioning column and the threaded column, and the sum of the lengths of the upper positioning column and the threaded column are both less than the length of the sleeve, and the lower positioning column and the threaded column are always located inside the sleeve when the positioning columns are inserted between the sleeves.

[0030] (III) Beneficial Effects

[0031] 1. The adjusting assembly is used to transmit the pushing and pulling force of the cylinder to the stepped push rod mechanism. Since the adjusting assembly can slide inside the sleeve, when the cylinder drives the adjusting assembly to move up and down, the adjusting assembly needs to be first driven to slide in the sleeve for a distance. By using this feature, the movement amplitude of the cylinder driving the stepped push rod mechanism is adjusted to adapt to different needs. In addition, since the threaded column is used as the connecting structure of the upper positioning column and the lower positioning column, the distance between the upper positioning column and the lower positioning column can be adjusted by rotating, thereby changing the length of the adjusting assembly to adjust the lifting amplitude of the stepped push rod mechanism, improving the applicability of the device. Furthermore, by arranging the sleeve with a limiting strip on the mounting seat, the adjusted positioning column can be locked to prevent relative rotation between the upper positioning column and the lower positioning column, ensuring the stability of the adjusted positioning column.

[0032] 2. By arranging two movable extrusion pins at the end of the positioning column, when the extrusion pins are expanded, they protrude out of the positioning column (protrude outward), can hook the connector or the sleeve, thereby hooking the sleeve when the positioning column moves to a certain position, thereby driving the stepped push rod mechanism to move. When the extrusion pins are retracted, the extrusion pins are flush with the outer wall of the positioning column, so the extrusion pins in this state will not affect the positioning column passing through the through hole of the sleeve or the connector, reducing the difficulty of adjusting the positioning column, and the length of the positioning column can be adjusted without tools. In addition, by using the limiting piece inserted at the end of the positioning column, the contraction of the two extrusion pins can be blocked, thereby ensuring the stability of the state of the extrusion pins. When it needs to be unlocked, the limiting piece can be pulled, and the two extrusion pins are attracted to each other under the magnetic force of the magnet on the limiting piece, thereby retracting into the positioning column, so as to take and place the positioning column. BRIEF DESCRIPTION OF DRAWINGS

[0033] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application and can be implemented according to the content of the specification, the following will be described in detail with the preferred embodiments of the present application and with the help of the drawings.

[0034] Figure 1 It is the overall structure diagram of the embodiment of the present application;

[0035] Figure 2 It is the exploded structure schematic diagram of the embodiment of the present application;

[0036] Figure 3Figure 1 is a back view of a pushing assembly according to an embodiment of the present application;

[0037] Figure 4 Figure 2 is a state diagram of the pushing assembly according to an embodiment of the present application;

[0038] Figure 5 Figure 3 is another state diagram of the pushing assembly according to an embodiment of the present application;

[0039] Figure 6 Figure 4 is a structure diagram of a connecting head according to an embodiment of the present application;

[0040] Figure 7 Figure 5 is a structure diagram of a mounting seat according to an embodiment of the present application;

[0041] Figure 8 Figure 6 is a structure diagram of an adjusting assembly according to an embodiment of the present application;

[0042] Figure 9 Figure 7 is an exploded view of the adjusting assembly according to an embodiment of the present application;

[0043] Figure 10 Figure 8 is a structure diagram of a limiting member according to an embodiment of the present application;

[0044] Figure 11 Figure 9 is a structure diagram of an extruding pin according to an embodiment of the present application;

[0045] Figure 12 Figure 10 is a state diagram of the adjusting assembly according to an embodiment of the present application;

[0046] Figure 13 Figure 11 is a state diagram of the extruding pin in an expanded state according to an embodiment of the present application;

[0047] Figure 14 Figure 12 is a state diagram of the extruding pin in a retracted state according to an embodiment of the present application.

[0048] Legend:

[0049] 1, main body;

[0050] 2, feeding platform;

[0051] 31, pushing assembly; 311, positioning plate; 312, movable plate; 313, guide rod; 314, sliding block; 315, mounting seat; 316, driven plate; 317, air cylinder; 318, connecting head; 319, sleeve; 32, fixed plate;

[0052] 4, adjusting assembly; 41, positioning upper column; 42, positioning lower column; 43, threaded column; 44, extruding pin; 441, arc-shaped piece; 442, connecting shaft; 45, limiting member; 451, pressing cap; 452, extruding column; 453, reserved slot; 454, retracted slot; 46, sliding slot; 47, threaded slot; 48, telescopic slot;

[0053] 5. The conveying table. DETAILED DESCRIPTION

[0054] The embodiment of the present application effectively solves the technical problems of poor adaptability and insufficient stability of the existing push rod counting machine in use by providing a stepped push rod mechanism. In the use of the existing push rod counting machine, the adjusting assembly is used to transmit the push-pull force of the air cylinder to the stepped push rod mechanism. Since the adjusting assembly can slide in the sleeve, when the air cylinder drives the adjusting assembly to lift, the adjusting assembly needs to slide a distance in the sleeve first. By using this feature, the movement amplitude of the stepped push rod mechanism driven by the air cylinder is adjusted to adapt to different needs. In addition, since the threaded column is used as the connecting structure of the upper positioning column and the lower positioning column, the distance between the upper positioning column and the lower positioning column can be adjusted by rotating, thereby changing the length of the adjusting assembly to adjust the lifting amplitude of the stepped push rod mechanism, thereby improving the applicability of the device. Furthermore, by setting the sleeve with a limiting strip on the mounting seat, the adjusted positioning column can be locked to prevent relative rotation between the upper positioning column and the lower positioning column, thereby ensuring the stability of the adjusted positioning column.

[0055] Embodiment 1: The technical solution in the embodiment of the present application effectively solves the technical problems of poor adaptability and insufficient stability of the existing push rod counting machine in use, and the general idea is as follows:

[0056] In view of the problems existing in the prior art, the present application provides a stepped push rod mechanism, which is installed on a push rod counting machine (main body 1). The push rod structure mainly consists of two parts. One part is a lifting structure (i.e. a push material assembly 31) that can drive the workpiece to lift; the other is a connecting structure (i.e. an adjusting assembly 4). The lifting structure is combined by a stepped fixed plate 32 and a driven plate 316, and the workpiece itself is lifted to the next step under the action of its own gravity. In this way, the workpiece is lifted by a certain height each time until it is lifted to the position of the conveying table 5, as shown in Figure 2 and Figure 3 .

[0057] A plurality of fixed plates 32 arranged in a stepped manner are installed on the push rod counting machine, as shown in Figure 2 , and a plurality of driven plates 316 are also provided on the push material assembly 31. The driven plates 316 are located in the gap between adjacent two fixed plates 32 and can slide in the gap.

[0058] In order to facilitate the workpiece to roll from one position to the next, the driven plate 316 and the fixed plate 32 are both inclined (during the lifting process of the driven plate 316, the push rod can alternately roll to the end of the driven plate 316 or the end of the fixed plate 32 under the action of its own gravity) and arranged in a stepped manner, as shown inFigure 2 And Figure 3 As shown in the figure, a plurality of driven plates 316 are mounted on the same movable plate 312, and the mounting seat 315 at the back of the movable plate 312 is connected with the connector 318 at the end of the air cylinder 317, so that all the driven plates 316 can be lifted during the extension and contraction of the air cylinder 317, and the lifting direction is consistent with the extension direction of the movable plate 312; at the same time, in order to improve the stability of movement and the convenience of subsequent adjustment, two positioning plates 311 parallel to each other are installed in the push rod counter, and a guide rod 313 is connected between the two positioning plates 311, and the guide rod 313 is inserted with the sliding block 314 at the back of the movable plate 312; in this way, when the movable plate 312 slides, it can slide along the guide rod 313.

[0059] And a set of springs are arranged at both ends of the sliding block 314, and the springs are sleeved outside the guide rod 313 and connected with the two positioning plates 311 through the springs, so that when the sliding block 314 is not subjected to the thrust of the air cylinder 317, the sliding block 314 is located at the middle position of the guide rod 313, thereby avoiding the movable plate 312 from moving with the air cylinder 317.

[0060] The specific process is as follows:

[0061] The workpiece is placed on the feeding table 2, and since the feeding table 2 is inclined, the original workpiece rolls in the direction of the push assembly 31 under the action of its own gravity until it contacts the lowermost driven plate 316 of the push assembly 31, as shown in the upper half of the figure. Figure 4 As shown in the upper half of the figure, then control the air cylinder 317 to drive all the driven plates 316 to descend, and when the driven plates 316 descend below the feeding table 2, the workpiece rolls to the top of the driven plates 316 under the action of its own gravity and falls onto the top of the driven plates 316; then the driven plates 316 are raised by the air cylinder 317 and moved to the height of the fixed plate 32, and when the height of the driven plates 316 is higher than that of the fixed plate 32, the workpiece will roll to the top of the fixed plate 32 under the action of its own gravity and finally fall onto the top of the fixed plate 32. In this way, the workpiece is pushed from the bottommost driven plate 316 to the topmost driven plate 316, and at this time, when the topmost driven plate 316 is higher than the conveying table 5, the workpiece falls onto the conveying table 5 and is transported outward along the conveying table 5. In this way, the transportation of the workpiece is completed, and the photoelectric counter is arranged at the end of the conveying table 5, so that the counting can be performed while conveying.

[0062] Embodiment 2: Based on embodiment 1, the present application provides a feasible solution for adjusting the lifting amplitude of the stepped push rod mechanism, and the general idea is as follows:

[0063] The connecting structure, which is also our main improvement scheme, is mainly to solve the problem of poor adaptability and instability of the traditional push rod counting machine. To solve this problem, we designed a telescopic mechanism and a docking structure to solve the problem of the telescopic length of the push assembly 31 not being suitable and the need for tools to install it. The specific content is as follows:

[0064] In order to adapt to the needs of different stepped push rod mechanism lifting height, we use positioning column instead of fixed connection of air cylinder 317 and stepped push rod mechanism, the positioning column is divided into corresponding positioning upper column 41 and positioning lower column 42, and the end of the positioning lower column 42 towards the positioning upper column 41 has a threaded column 43, as shown in Figure 9 and Figure 12 The other end of the threaded column 43 is inserted into the positioning upper column 41 and connected between the positioning upper column 41 and the positioning lower column 42 by screw thread, so that when rotating the positioning upper column 41, it will rotate relative to the positioning lower column 42 under the action of the external thread of the threaded column 43, while the distance between the two will increase or decrease, as shown in Figure 12 (a) and (b);

[0065] In use, it is found that due to the lack of limiting structure between the positioning upper column 41 and the positioning lower column 42, when encountering vibration or accidental touch, both will move relative to each other, so that the distance between the positioning upper column 41 and the positioning lower column 42 changes, resulting in unstable lifting amplitude of the stepped push rod mechanism. In order to solve this problem, we insert several sets of limiting strips in the sleeve 319 on the mounting seat 315, as shown in Figure 6 and Figure 7 After the positioning column is installed, the connecting head 318 and the sleeve 319 on the mounting seat 315 correspond, and the inner wall of the sleeve 319 and the outer wall of the positioning upper column 41 and the positioning lower column 42 are all provided with several sets of limiting strips, as shown in Figure 4 and Figure 5As shown in the enlarged view in the figure, when the positioning upper column 41 and the positioning lower column 42 are inserted into the sleeve 319, the locking effect is achieved by the mutual engagement between the limiting strips on the outer walls of the positioning upper column 41 and the positioning lower column 42 and the limiting strips on the inner wall of the sleeve 319, so that the positioning upper column 41 and the positioning lower column 42 cannot rotate relative to each other, thereby avoiding changes in the length of the positioning column due to vibration or accidental touch. In addition, in order to ensure that the positioning upper column 41 and the positioning lower column 42 do not rotate relative to each other, the connection between the two must always be located in the sleeve 319, so that the sleeve 319 can lock the positioning upper column 41 and the positioning lower column 42 at the same time. Therefore, the length of the positioning upper column 41 and the length of the threaded column 43 must be controlled to be less than the length of the sleeve 319, so that even when the sleeve 319 moves to the end where the positioning upper column 41 is located, the sleeve 319 is always sleeved between the positioning upper column 41 and the positioning lower column 42.

[0066] Similarly, by controlling the length of the positioning lower column 42 and the length of the threaded column 43 to be less than the length of the sleeve 319, the connection between the positioning lower column 42 and the threaded column 43 can also be kept inside the sleeve 319 when the sleeve 319 moves to the end where the positioning lower column 42 is located.

[0067] The docking structure, which can replace the "bolt" to connect the mounting seat 315 and the air cylinder 317, is shown in Figure 8 and Figure 9 The end position of the positioning column is provided with two groups of opposing extrusion pins 44, which are embedded in the positioning column and can slide in the positioning column. In order to ensure that the two extrusion pins 44 can be retracted, a powerful magnet (neodymium iron boron) is embedded at the opposite end of each extrusion pin 44. The two extrusion pins 44 can move towards the center of the positioning column under the attraction of the powerful magnet, thereby being retracted into the positioning column, so that the positioning column can pass through the through hole.

[0068] In order to ensure stable movement of the extrusion pin 44, an outwardly extending guide groove is symmetrically formed at the end position of the positioning column, and a sliding groove 46 is formed on the inner wall of each side of the guide groove. The extension direction of the sliding groove 46 is perpendicular to the length direction of the positioning upper column 41, as shown in Figure 9 、 Figure 11 - Figure 14 The connecting shaft 442 outside the extrusion pin 44 (i.e. the arc-shaped piece 441) can be inserted into the sliding groove 46 and slide along the extension direction of the sliding groove 46, thereby forming two states of opening and closing.

[0069] In the expanded state, the end of the extrusion pin 44 extends out of the positioning column, blocking the movement path of the sleeve 319, thereby limiting the movement position of the sleeve 319, as shown in Figure 12 Fig. (b) and Figure 13 Fig. (c);

[0070] In the closed state, the extrusion pin 44 is accommodated into the positioning column under the action of the magnetic attraction, and the outer wall of the extrusion pin 44 is flush with the outer wall of the positioning column 41, which does not affect the positioning column passing through the through hole of the sleeve 319 and the through hole of the connector 318, as shown in Figure 12 Fig. (b) and Figure 14 Fig. (c).

[0071] In addition, in order to ensure the stability of the extrusion pin 44 in the expanded state, a limiting piece 45 is inserted at the end of the positioning column, which is inserted between the two extrusion pins 44, thereby limiting the activity range of the two extrusion pins 44. The specific structure is as follows:

[0072] The limiting piece 45 mainly comprises a cylindrical pressing cap 451 and an extrusion column 452 below the pressing cap 451 (towards the end of the positioning column), the extrusion column 452 is inserted into the positioning column and can move up and down along the expansion slot 48 at the end of the positioning column, the expansion direction of the expansion slot 48 is consistent with the length direction of the positioning column, as shown in Figure 13 and Figure 14 When the extrusion column 452 slides along the expansion slot 48, and the two extrusion pins 44 are located on both sides of the sliding path of the extrusion column 452, although this way can lock the expanded state of the extrusion pin 44, but it has an impact on the expansion and contraction of the extrusion pin 44, therefore, two groups of reserved slots 453 and two groups of accommodation slots 454 (the inner wall of the accommodation slot 454 is inclined to facilitate the extrusion pin 44 to expand outward along the inner wall of the accommodation slot 454) are symmetrically arranged on the outer wall of the extrusion column 452, and the reserved slots 453 are located above the accommodation slots 454, as shown in Figure 8 , Figure 11 and Figure 12 During the movement of the extrusion column 452, the reserved slots 453 and the pressing cap 451 move synchronously up and down, when the reserved slots 453 move between the two extrusion pins 44, the end of the extrusion pin 44 extends out of the positioning column, as shown in Figure 11 At this time, the extrusion pin 44 is limited by the extrusion column 452 and cannot be retracted, but can only remain in the expanded state, and the recessed structure of the reserved slots 453 can prevent the extrusion column 452 from moving to a certain extent, thereby forming a mutual locking structure; when the accommodation slot 454 moves between the two extrusion pins 44, the extrusion pins 44 are attracted to each other under the action of the strong magnet installed on the extrusion pin 44, thereby entering the accommodation slot 454, at this time, the end of the extrusion pin 44 is flush with the outer wall of the positioning column, as shown in Figure 12 .

[0073] In the implementation process, the connecting head 318 is corresponded with the sleeve 319 on the mounting seat 315 up and down, forming a state as shown in Figure 4 and Figure 5 After completion, the positioning column is adjusted, and the specific steps are as follows:

[0074] Step one (positioning column length adjustment), as shown in Figure 12 (a), the relative rotation between the positioning upper column 41 and the positioning lower column 42 is realized, since the end of the positioning lower column 42 towards the positioning upper column 41 has a threaded column 43, as shown in Figure 9 and Figure 12 The other end of the threaded column 43 is inserted into the positioning upper column 41 (the threaded groove 47 thereon) and is threadedly connected with the positioning upper column 41, so that when the positioning upper column 41 is rotated, the spacing between the two is increased or decreased under the action of the external thread of the threaded column 43, as shown in Figure 12 (a) and (b), to adjust the total length of the positioning column to adapt to different needs;

[0075] Step two (extrusion pin 44 storage), first hold the pressing cap 451 at the end of the positioning column, and move the extrusion column 452 upwards until the storage groove 454 moves between the two extrusion pins 44, at this time the extrusion pins 44 are attracted to each other under the action of the strong magnet installed thereon, thereby entering the storage groove 454, at this time the end of the extrusion pin 44 is flush with the outer wall of the positioning column, as shown in Figure 14 Therefore, the extrusion pin 44 in this state will not affect the movement of the positioning column, and then the positioning column can be inserted into the sleeve 319 outside the fan;

[0076] Step three (positioning column installation), since the inner wall of the sleeve 319 and the outer walls of the positioning upper column 41 and the positioning lower column 42 are provided with a plurality of sets of limiting strips, as shown in Figure 6 and Figure 7 When the positioning upper column 41 and the positioning lower column 42 are inserted into the sleeve 319, the limiting strips on the outer walls of the positioning upper column 41 and the positioning lower column 42 and the limiting strips on the inner wall of the sleeve 319 are engaged with each other, so that the positioning upper column 41 and the positioning lower column 42 cannot be relatively rotated, thereby achieving the locking effect, avoiding the change of the length of the positioning column due to vibration or accidental touch;

[0077] Step four (extrusion pin 44 is unfolded), press the press cap 451 at the end of the positioning column, because the extrusion column 452 at the bottom of the press cap 451 is provided with a reserved slot 453 and a receiving slot 454, and the depth of the receiving slot 454 is greater than that of the receiving slot 454, and the extrusion column 452 can move with the press cap 451, so when the press cap 451 is pressed, the reserved slot 453 on the extrusion column 452 can be moved between the two extrusion pins 44, and then, because the inner wall of the receiving slot 454 is inclined, the extrusion pin 44 is unfolded along the inner wall of the receiving slot 454 during the movement of the extrusion column 452, until the reserved slot 453 moves between the two extrusion pins 44, at which time the extrusion pin 44 is affected by the extrusion column 452 and cannot be retracted, but can only remain in the unfolded state, and the recessed structure of the reserved slot 453 can prevent the extrusion column 452 from moving to some extent, thereby forming an interlocking structure.

[0078] At this time, the cylinder 317 can be controlled to start the extension and contraction movement, as shown in Figure 4 , the cylinder 317 drives the connecting head 318 at the head to move upward, because the connecting head 318 is connected with the adjusting assembly 4, and the adjusting assembly 4 is inserted into the sleeve 319 at the top of the mounting seat 315 (both can slide relative to each other), therefore, when the mounting seat 315 moves on the connecting head 318, the adjusting assembly 4 slides upward along the sleeve 319 until the top of the connecting head 318 is attached to the bottom of the mounting seat 315, at this time, the cylinder 317 is elongated again, which drives the mounting seat 315 and the pushing assembly 31 connected with the mounting seat 315 to move upward, and in this process, because the pushing force of the cylinder 317 cannot act on the mounting seat 315 before the connecting head 318 contacts the mounting seat 315, the pushing distance of the cylinder 317 will be reduced in the process; similarly, as shown in Figure 5 , when the cylinder 317 is contracted, the adjusting assembly 4 on the connecting head 318 will also slide in the sleeve 319 for a distance before the extrusion pin 44 at the end thereof contacts the sleeve 319 on the mounting seat 315, thereby shortening the descending height; therefore, by adjusting the length of the positioning column, the reduction of the pushing length of the cylinder 317 can be controlled. In order to ensure the stable operation of the device, the elongation length of the cylinder 317 needs to be greater than the width of the driven plate 316, so that the stable conveying of the push rod can still be maintained after reduction. In order to adapt the adjusting assembly, an opening is formed at the front end of the connecting head 318, and a groove corresponding to the extrusion pin 44 is arranged in the opening, as shown in Figure 6 .

[0079] It should be pointed out finally that the above embodiments are merely examples for clearly illustrating the present application and are not intended to limit the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. It is unnecessary and impossible to enumerate all the embodiments. The changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A stepped pusher mechanism mounted on a pusher counter, characterized in that, The push rod structure comprises: A plurality of fixed plates (32) arranged in a stepped manner, and the fixed plates (32) are installed on a push rod counter; A reciprocating pusher assembly (31) is provided with a plurality of driven plates (316), and the driven plates (316) are located in the gap between adjacent two fixed plates (32) and can lift the position of the push rod; Wherein, the driven plate (316) and the fixed plate (32) are both arranged obliquely, a plurality of the driven plates (316) are arranged in a stepped manner, and a plurality of the driven plates (316) move synchronously, in the lifting process of the driven plate (316), the push rod can roll to the end of the driven plate (316) or the end of the fixed plate (32) under the action of its own gravity.

2. A stepped push rod mechanism as claimed in claim 1, characterized in that: The pusher assembly (31) comprises an inclined movable plate (312), and a plurality of the driven plates (316) are arranged on the movable plate (312) in sequence, the movable plate (312) is lifted under the drive of a back cylinder (317), and the lifting direction is consistent with the extension direction of the movable plate (312).

3. A stepped push rod mechanism as in claim 1, wherein: The pusher assembly (31) further comprises two parallel positioning plates (311), and a guide rod (313) is connected between the two positioning plates (311), the guide rod (313) is inserted with a sliding block (314) at the back of the movable plate (312); Wherein, a set of springs is arranged at both ends of the sliding block (314), and the springs are sleeved outside the guide rod (313), when the sliding block (314) is not affected by the thrust of the cylinder (317), the sliding block (314) is located at the middle position of the guide rod (313).

4. A stepped push rod mechanism as claimed in any one of claims 1 to 3, characterised in that: The end of the cylinder (317) is connected with an adjusting assembly (4), and the cylinder (317) is inserted with a sleeve (319) on the mounting seat (315) through the adjusting assembly (4), the sleeve (319) can slide between the two ends of the adjusting assembly (4); Wherein, when the sleeve (319) slides between the two ends of the adjusting assembly (4), the sleeve (319) slides relative to the adjusting assembly (4).

5. A stepped push rod mechanism as claimed in claim 4, characterised in that: The adjusting assembly (4) comprises a positioning column, two sets of opposite extrusion pins (44) are arranged at the end position of the positioning column, the extrusion pins (44) are embedded in the positioning column and can slide in the positioning column, one magnet is embedded at the opposite end of each of the two extrusion pins (44), and the extrusion pins (44) can move to the center of the positioning column under the attraction of the magnet; When the extrusion pins (44) are expanded, the ends thereof protrude out of the positioning column; when the extrusion pins (44) are retracted, the outer wall of the extrusion pins (44) is flush with the outer wall of the positioning column (41).

6. A stepped push rod mechanism as claimed in claim 5, characterised in that: The end position of the positioning column is symmetrically provided with an outwardly extending guide groove, and a sliding groove (46) is formed in the inner wall of each side of the guide groove, the extension direction of the sliding groove (46) is perpendicular to the length direction of the positioning column (41); The connecting shaft (442) outside the extrusion pin (44) is inserted in the sliding groove (46) and can slide along the extension direction of the sliding groove (46).

7. A stepped push rod mechanism as claimed in claim 6, characterised in that: The end of the positioning column is inserted into a limiting piece (45), and the limiting piece (45) is located between two extrusion pins (44) and can limit the movement of the two extrusion pins (44); The limiting piece (45) comprises a pressing cap (451), and an extrusion column (452) is arranged at one end of the pressing cap (451) and inserted into the positioning column and can slide along the length direction of the positioning column, and the two extrusion pins (44) are located on both sides of the sliding path of the extrusion column (452).

8. A stepped push rod mechanism as claimed in claim 7, characterised in that: Two reserved grooves (453) and two receiving grooves (454) are symmetrically arranged on the outer wall of the extrusion column (452), and the reserved grooves (453) are located above the receiving grooves (454). During the movement of the extrusion column (452), the reserved grooves (453) and the pressing cap (451) are driven to move up and down, when the reserved grooves (453) move between the two extrusion pins (44), the ends of the extrusion pins (44) protrude out of the positioning column, and when the receiving grooves (454) move between the two extrusion pins (44), the ends of the extrusion pins (44) are flush with the outer wall of the positioning column.

9. A stepped push rod mechanism as claimed in claim 8, characterised in that: The positioning column comprises a positioning upper column (41) and a positioning lower column (42) corresponding to each other, and a threaded column (43) is arranged at one end of the positioning lower column (42) towards the positioning upper column (41), the other end of the threaded column (43) is inserted into the positioning upper column (41) and is threadedly connected with the positioning upper column (41), and the distance between the positioning upper column (41) and the positioning lower column (42) can be adjusted by rotating the positioning upper column (41); The inner wall of the sleeve (319) and the outer walls of the positioning upper column (41) and the positioning lower column (42) are provided with a plurality of sets of limiting strips, when the positioning upper column (41) and the positioning lower column (42) are inserted into the sleeve (319), the limiting strips on the outer walls of the positioning upper column (41) and the positioning lower column (42) and the limiting strips on the inner wall of the sleeve (319) are engaged with each other, and the relative rotation of the positioning upper column (41) and the positioning lower column (42) is limited.

10. A stepped push rod mechanism as claimed in claim 9, characterized in that: The sum of the lengths of the positioning lower column (42) and the threaded column (43) and the sum of the lengths of the positioning upper column (41) and the threaded column (43) are all less than the length of the sleeve (319), and when the positioning column is inserted between the sleeve (319), the positioning lower column (42) and the threaded column (43) are always located in the sleeve (319).

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