Push rod assembly of multi-packaging machine

Abstract

The push rod assembly of the multi-packaging machine comprises a first shaft rod and a second shaft rod, the first shaft rod is composed of a large-diameter section used for being inserted into a main sleeve and a small-diameter section used for being in butt joint with the second shaft rod, and a fixing sleeve is wrapped outside the butt joint structure of the small-diameter section and the second shaft rod. The first shaft rod and the second shaft rod are fixed through the fixing sleeve, the support does not need to be disassembled during maintenance or remodeling, the whole push rod does not need to be disassembled completely, and the maintenance and remodeling time can be shortened.

Description

Technical Field

[0001] This utility model relates to a material conveying mechanism, and more particularly to a multi-packer push rod assembly. Background Technology

[0002] A multi-packaging machine is essentially a packaging machine that transforms single packages into multiple packages. Single packages flow into the multi-packaging machine's feeding and aligning station via a conveyor line. The packages are then aligned, such as in a 3-row x 1-column x 1-layer configuration, a 4-row x 2-column x 1-layer configuration, or a 3-row x 3-column x 2-layer configuration. Pushers at the aligning station move the aligned packages to the opening station, where a pre-made bag is opened. A pusher then pushes the aligned packages into the pre-made bag. The pre-made bag then enters the sealing station, where it is heat-sealed, completing the multi-packaging process. The conveying structure of the multi-packaging machine consists of components such as supports, chains, gears, and pushers. For example, a high-speed film packaging machine disclosed in patent application CN 108820302A features two sets of ring chains distributed horizontally, with pushers positioned between the chains. The rotation of the chains drives the pushers in a reciprocating motion, which in turn moves the packages, thus conveying them.

[0003] Multi-packing machines require regular maintenance and upkeep to ensure smooth and stable operation. However, the existing push rod is an integral structure, which makes disassembly difficult and cumbersome during maintenance, upkeep, and modification, delaying each maintenance. Furthermore, the push rod is directly inserted into the sleeves at both ends and then fixed to the chain by two mounting blocks. During operation, the push rod is prone to jamming, causing wear on the mounting shafts on the mounting blocks. Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to provide a multi-pack push rod assembly that is easy to disassemble.

[0005] Technical solution: The multi-pack push rod assembly of this utility model includes a first shaft and a second shaft. The first shaft consists of a large-diameter section for inserting into the main sleeve and a small-diameter section for docking with the second shaft. The outer diameter of the small-diameter section is equal to the outer diameter of the second shaft. The docking structure of the small-diameter section and the second shaft is externally wrapped with a fixing sleeve.

[0006] Preferably, the outer diameter of the small-diameter section is equal to the outer diameter of the second shaft.

[0007] Preferably, the docking structure of the small diameter segment includes several arc-shaped claws, and a locking groove is formed between the arc-shaped claws. The docking structure of the second shaft includes several locking blocks that can be inserted into the locking groove.

[0008] Preferably, to ensure the stability of the docking structure, the docking structure of the small-diameter segment includes a central cylinder with the same center and several arc-shaped claws, with a locking groove formed between two adjacent arc-shaped claws and an arc-shaped groove formed between the arc-shaped claws and the central cylinder; the docking structure of the second shaft includes several locking blocks and a central insert ring connecting the locking blocks; when the small-diameter segment and the second shaft are docked, the locking blocks and arc-shaped claws are spliced ​​together to form a complete ring, and the central insert ring is inserted into the arc-shaped groove and sleeved on the outside of the central cylinder.

[0009] Preferably, the fixing sleeve has a first opening on one side, and screws for adjusting the size of the first opening are connected to the fixing sleeve on both sides of the first opening.

[0010] Preferably, in order to reduce wear on the push rod, the push rod assembly further includes a side sleeve assembly for connecting the chain and the first shaft or connecting the chain and the second shaft. The side sleeve assembly includes an annular side sleeve, with a bearing inside for connecting the first shaft or the second shaft, and symmetrically arranged wings on the outside for connecting with the chain.

[0011] Preferably, the side sleeve assembly includes a limiting sleeve, a recessed limiting hole is provided on one side of the wing rod end, an insertion hole is provided in the limiting hole to pass through the wing rod, a through hole is provided in the limiting sleeve corresponding to the insertion hole, a second opening slit is provided on one side of the limiting sleeve, the size of the limiting sleeve is not smaller than the size of the limiting hole, when the side sleeve assembly is connected to the chain link pin, the insertion hole and the limiting sleeve are sequentially fitted on the chain link pin, the second opening slit is squeezed to reduce the size of the limiting sleeve, so that the limiting sleeve is embedded in the limiting hole.

[0012] Preferably, the wing rod includes an inclined rod connected to the side sleeve and a crossbar for connecting to the chain link pin. The inclined angle of the inclined rod is 40 to 60°, and the limiting hole is located on the crossbar.

[0013] Preferably, there are at least two through holes. The second opening is located on one side of the limiting sleeve and communicates with one through hole. The side of the remaining through holes is connected to a transition through hole that causes the limiting sleeve to deform. The size of the transition through hole is not smaller than the size of the through hole.

[0014] Beneficial effects: Compared with the prior art, this utility model has the following advantages: 1. Easy disassembly and assembly: The first shaft and the second shaft are fixed with a fixing sleeve, which eliminates the need to disassemble the bracket or remove the entire push rod. Disassembly and assembly are very convenient. Each modification can save about 60 minutes and increase production by about 180 boxes; 2. Reduced wear: Replacing the connection method of the push rod with a bearing and side sleeve assembly makes it less prone to wear; 3. Easy installation: The limiting sleeve and the limiting hole are interference fit. The side sleeve assembly and chain can be assembled simply by inserting the limiting sleeve into the limiting hole. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the push rod and fixing sleeve structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the side sleeve structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the assembly state of the side sleeve component of this utility model;

[0019] Figure 5 This is a schematic diagram of the assembly structure of the side sleeve assembly, chain, and push rod of this utility model. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0021] like Figure 1 The multi-pack push rod disclosed in this utility model includes a first shaft 1 and a second shaft 2, both coaxially arranged. The first shaft 1 is a variable diameter structure, including a large-diameter section 11 and a small-diameter section 12 connected together. The outer diameter of the large-diameter section 11 is larger than that of the small-diameter section 12. The large-diameter section 11 is used to install the main sleeve 5. The end of the small-diameter section 12 is used to connect to the second shaft 2. The main sleeve 5 is used to connect with a positioning guide structure (not shown, perpendicular to the push rod axis). The size of the main sleeve 5 is already determined, and the size of the push rod is changed to save costs. The end of the small-diameter section 12 and the end connected to the second shaft 2 are respectively provided with a docking structure. A fixing sleeve 3 is sleeved on the outside of the docking structure. After the end of the small-diameter section 12 and the second shaft 2 are docked, the fixing sleeve 3 surrounds the outside of the docking structure to ensure a stable connection. The outer diameters of the small-diameter section 12 and the second shaft 2 can be equal or unequal. When they are equal, it helps to simplify the internal structure of the fixing sleeve 3.

[0022] The docking structure of the small diameter segment 12 includes a central cylinder 121 and arc-shaped claws arranged at the same center. The arc-shaped claws are symmetrically or evenly distributed on both sides of the central cylinder 121. A locking groove 122 is formed between two adjacent arc-shaped claws, and an arc-shaped groove is formed on the inner side of the arc-shaped claws and the outer side of the central cylinder 121.

[0023] The docking structure of the second shaft 2 includes a locking block 21 and a central insert ring 22. The locking blocks 21 are symmetrically or evenly distributed on both sides of the central insert ring 22. When the small diameter section 12 and the second shaft 2 are docked, the locking blocks 21 are inserted into the locking groove 122. The locking blocks 21 and the arc-shaped claw can be spliced ​​to form a complete ring. The central insert ring 22 is inserted into the arc groove and fits on the outside of the central cylinder 121.

[0024] When the outer diameters of diameter segment 12 and the second shaft 2 are equal, the fixing sleeve 3 has a cylindrical hole in the middle; when they are not equal, the fixing sleeve 3 has a stepped hole in the middle. Taking the cylindrical hole as an example, the cylindrical hole covers / wraps the outside of the mating structure. One side of the fixing sleeve 3 has a first opening slit 31. The fixing sleeve 3 outside the first opening slit 31 is provided with a screw 32 for adjusting the size of the opening slit. Rotating the screw 32 opens or squeezes the first opening slit 31, which can adjust the tightness of the fixing sleeve 3 outside the mating structure.

[0025] Both ends of the push rod are provided with side sleeve assemblies 4 for connecting with the chain 6. The side sleeve assembly 4 includes a side sleeve 41 and a limiting sleeve 43. The side sleeve 41 is annular and has a bearing 44 inside. The bearing 44 is used to connect with the large diameter section 11 or the second shaft 2. The upper middle part of the outside of the side sleeve 41 is provided with a wing rod 42. The wing rod 42 is used to connect the side sleeve 41 and the chain 6. The wing rod 42 is a bent rod. The end near the side sleeve 41 is an inclined rod 421. The inclination angle of the inclined rod 421 is preferably 40° to 60°. The top of the inclined rod 421 is a crossbar 422. With the axis of the side sleeve 41 as a reference, a concave limiting hole 423 is provided on one side of the crossbar 422. That is, the limiting hole 423 is a blind hole. The bottom of the limiting hole 423 is provided with an insertion hole 424. The insertion hole 424 passes through the front and rear sides of the crossbar 422 and is used to connect with the chain link pin 61 of the chain 6. The inner diameter of the bearing 44, which is fitted onto the large-diameter section 11 of the first shaft 1 and the second shaft 2, is determined based on the outer diameter of the large-diameter section 11 of the first shaft 1 and the second shaft 2.

[0026] The size of the limiting sleeve 43 is not less than or slightly larger than the size of the limiting hole 423. The limiting sleeve 43 has through holes of the same number and size as the insertion hole 424. When there is one through hole, a second opening slit communicating with the through hole is provided on one side of the limiting sleeve 43. Thus, when the limiting sleeve 43 is squeezed up and down, the size of the limiting sleeve 43 can be reduced and embedded in the limiting hole 423. When there are two through holes, a second opening slit can be provided on both sides of the two through holes, or one through hole communicates with the second opening slit, and a transition through hole is provided on the side of the remaining through hole. The size of the transition through hole is larger than the through hole, and the remaining through hole communicates with the transition through hole. Thus, when the middle of the limiting sleeve 43 is squeezed, both ends of the limiting sleeve 43 can deform to smoothly enter the limiting hole 423.

[0027] When connecting the push rod and the chain 6, insert the insertion hole 424 of the wing rod 42 into the chain link pin 61. The limiting hole 423 is on the side of the wing rod 42 away from the chain 6. Then, put the limiting sleeve 43 on the outside of the chain link pin 61, squeeze the limiting sleeve 43, and push the limiting sleeve 43 into the limiting hole 423 to complete the connection of the side sleeve assembly 4 and the chain 6. Insert the push rod into the bearing 44 of the side sleeve 41 to complete the connection of the push rod and the side sleeve assembly 4.

[0028] When the first shaft 1 and the second shaft 2 of the push rod are connected, the fixing sleeve 3 is fitted onto the connection structure of the first shaft 1 and the second shaft 2 and locked, thus completing the connection between the first shaft 1 and the second shaft 2.

Claims

1. A multi-pack pusher assembly, characterized by, The assembly includes a first shaft (1), a second shaft (2), and a side sleeve assembly (4) for connecting the chain and the first shaft or connecting the chain and the second shaft. The first shaft (1) consists of a large-diameter section (11) for inserting into the main sleeve and a small-diameter section (12) for docking with the second shaft. The docking structure of the small-diameter section (12) and the second shaft (2) is wrapped with a fixing sleeve (3). The side sleeve assembly (4) includes an annular side sleeve (41). The side sleeve (41) is provided with a bearing (44) inside for fitting the first shaft (1) or the second shaft (2). The side sleeve (41) is symmetrically provided with wing rods (42) for connecting with the chain. The end of the wing rod (42) is provided with a socket (424) for connecting with the chain link pin.

2. The multi-pack push rod assembly of claim 1, wherein, The outer diameter of the small diameter segment (12) is equal to the outer diameter of the second shaft (2).

3. The multi-pack pusher assembly of claim 1, wherein, The docking structure of the small diameter segment (12) includes several arc-shaped claws, and a locking groove (122) is formed between the arc-shaped claws. The docking structure of the second shaft (2) includes several locking blocks (21) that can be inserted into the locking groove.

4. The multi-pack pusher assembly of claim 1, wherein, The docking structure of the small diameter segment (12) includes a central cylinder (121) with the same center and several arc claws. A locking groove (122) is formed between two adjacent arc claws, and an arc groove is formed between the arc claws and the central cylinder (121). The docking structure of the second shaft (2) includes several locking blocks (21) and a central insert ring (22) connecting the locking blocks. When the small diameter segment and the second shaft are docked, the locking blocks (21) and the arc claws are spliced ​​to form a complete ring, and the central insert ring (22) is inserted into the arc groove and sleeved on the outside of the central cylinder (121).

5. The multi-pack push rod assembly of claim 1, wherein, The fixing sleeve (3) has a first opening slot (31) on one side, and screws (32) for adjusting the opening size of the first opening slot are connected to the fixing sleeves on both sides of the first opening slot (31).

6. The multi-pack pusher assembly of claim 1, wherein, The side sleeve assembly (4) includes a limiting sleeve (43). The end of the wing rod (42) is provided with a recessed limiting hole (423) on one side. The insertion hole (424) is located inside the limiting hole (423). The size of the limiting sleeve (43) is not smaller than the size of the limiting hole (423). The limiting sleeve (43) is provided with a through hole corresponding to the insertion hole. The side is provided with a second opening slit connecting the through hole. When the side sleeve assembly (4) is connected to the chain link pin, the insertion hole (424) and the limiting sleeve (43) are sequentially sleeved on the chain link pin. The second opening slit is squeezed to reduce the size of the limiting sleeve (43) so that the limiting sleeve (43) can be embedded in the limiting hole (423).

7. The multi-pack pusher assembly of claim 6, wherein, The wing rod (42) includes an inclined rod (421) for connecting with the side sleeve and a cross rod (422) for connecting with the chain link pin. The inclined angle of the inclined rod (421) is 40~60° and the limiting hole (423) is located on the cross rod (422).

8. The multi-pack pusher assembly of claim 6, wherein, The number of through holes is not less than two. The second opening is located on one side of the limiting sleeve and is connected to one through hole. The side of the remaining through holes is connected to a transition through hole that causes the limiting sleeve (43) to deform. The size of the transition through hole is not less than the size of the through hole.

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