A self-guiding push chain device based on light or heavy load push chains

Abstract

The utility model relates to a self-guiding push chain device based on light load or heavy load push chain, relates to chain transmission technical field, including chain box for storing push chain body, drive box for driving push chain body to stretch out and draw back and connected in one end of chain box, push chain guide rail for providing guidance for push chain body and connected outside drive box, push chain body is push chain by light load chain structure or heavy load chain structure, the end of push chain body is connected with end chain link, and end chain link is connected with connecting structure for connecting with pushed object, the device provides guidance when push chain body stretches out, solves the problem of bending, instability, inconvenient use during the use of push chain body.

Description

Technical Field

[0001] This invention relates to the field of chain drive technology, specifically to a self-guided push chain device based on a lightly loaded or heavily loaded push chain. Background Technology

[0002] A push chain device is a transmission device that uses a push chain to transmit thrust or tension. Its main component, the push chain, is a special type of chain that can be bent like other chains for easy storage. When straight, it acts like a rigid rod, capable of transmitting both thrust and tension. Due to these characteristics, push chain devices are currently used in automated warehousing and logistics, manufacturing production lines, stage performances, and the nuclear industry.

[0003] Patent document CN222331277U discloses a push chain for a villa ladder, including a push chain body. The push chain body includes a first chain plate and a second chain plate. The upper front end of the first and second chain plates has a limiting groove, and the upper rear end has a limiting block. The limiting groove and the limiting block cooperate with each other. A first protrusion extending forward is provided at the bottom front end of the first and second chain plates, and a first connecting hole is provided on the first protrusion. A second protrusion is provided at the rear end of the first or second chain plate located below the limiting block, and the second protrusion has a second connecting hole. The second protrusion bends and translates outward relative to the first or second chain plate by a distance equal to the thickness of the first protrusion. The second protrusions of the first and second chain plates face opposite directions with respect to the first protrusion. This invention is used for installation on the side of a villa ladder car and has the advantages of simple structure, small space occupation, high speed, high load capacity, low maintenance cost, and safety and reliability.

[0004] Based on the above patent documents, patent document CN120308891A discloses a push-chain type lifting platform, and describes that the push chain is configured according to the different loads of the lifting platform as either a light-load chain composed of several light-load links connected in sequence (light-load chain) or a heavy-load chain composed of several heavy-load links connected in sequence (heavy-load chain), such as... Figure 8 As shown, the light-load chain link is the same as the chain link of a push chain for a villa ladder (CN222331277U), the only difference being: the outer rollers on both sides of the pin are removed, the length of the roller is shortened, and first rollers are installed on the pins on both sides of the rollers. Correspondingly, two sprockets that cooperate with the first rollers are installed on the drive shaft; as shown. Figure 9 As shown, the heavy-duty chain link is based on the light-duty chain link, with two additional second rollers installed at both ends of the pin shaft. At the same time, two sprockets that cooperate with the second rollers are set on the drive shaft. The load capacity of the push chain is increased by cooperating with the heavy-duty chain link through the four sprockets.

[0005] The above patent document CN120308891A discloses a push chain lifting platform that provides a push chain composed of a heavy-duty chain structure and a light-duty chain structure. In actual use, although the push chain body is rigid, it may bend or become unstable when it extends a long distance, and cannot transmit push and pull forces normally, causing inconvenience in use. Utility Model Content

[0006] A self-guided push chain device based on a light-load or heavy-load push chain is disclosed. This device provides guidance when the push chain body extends, solving the problems of bending, instability, and inconvenience of use of the push chain body during use. It should be noted that the push chain involved in this invention refers to the push chain provided by a push chain type lifting work platform disclosed in patent document CN120308891A, which is composed of a heavy-load chain structure and a light-load chain structure.

[0007] To achieve the above objectives, the technical solution of this invention is as follows:

[0008] A self-guided push chain device based on a light-load or heavy-load push chain includes a chain box for storing the push chain body, a drive box connected to one end of the chain box for driving the extension and retraction of the push chain body, and a push chain guide rail connected to the outside of the drive box for guiding the push chain body. The push chain body is a push chain composed of a light-load chain structure or a heavy-load chain structure. The end of the push chain body is connected to an end link, and the end link is connected to a connecting structure for connecting with the object being pushed.

[0009] Preferably, the push chain guide rail is a drive box guide rail plate extending outward along the drive box. The drive box guide rail plate includes a first guide rail plate and a second guide rail plate arranged opposite to each other. The opposite ends of the first guide rail plate and the second guide rail plate form a guide space for the push chain body to pass through. The middle roller of the light-load chain structure or the heavy-load chain structure rolls in cooperation with the opposite ends of the first guide rail plate and the second guide rail plate.

[0010] Preferably, the push chain guide is an E-shaped guide, which includes a C-shaped groove and a central guide plate located at the bottom center of the inner surface of the C-shaped groove. The middle roller of the heavy-duty chain structure rolls with the central guide plate. The limiting block of the heavy-duty chain structure is located inside or outside the C-shaped groove. The outer roller of the heavy-duty chain structure rolls with the top inner surfaces of the two side walls of the C-shaped groove.

[0011] Preferably, the push chain guide rail is a T-shaped guide rail with an inverted "convex" cross-section. The two shoulders of the T-shaped guide rail form guide side eaves. The two sides of the light-load chain structure are respectively connected to L-shaped sliders that slide in cooperation with the guide side eaves. The middle roller of the light-load chain structure rolls in cooperation with the top of the T-shaped guide rail.

[0012] Preferably, the two ends of the pin of the light-load chain are respectively connected to a first L-shaped slider or a second L-shaped slider is connected to the outer end of the limiting block of the light-load chain.

[0013] Preferably, the end link includes two opposing end plates. Each end plate has two connecting holes, which replace the limiting blocks on the same side of the heavy-duty or light-duty chain structure. The two connecting holes are clearance-fitted with corresponding pins. A central roller is clearance-fitted in the middle of the pin. Side rollers that clearance-fit the pin are located on both sides of the central roller and inside the end plate. Washers are provided at both ends of the pin on the outer side of the end plate. The pin has a mounting groove on the shaft wall outside the washers. An elastic retaining ring is provided in the mounting groove. The inner surface of the elastic retaining ring abuts against the outer surface of the outermost washer of the pin. A connecting shaft is also connected between the front ends of the two opposing end plates. An end plate limiting block is provided at the rear end of the end plate to cooperate with the adjacent limiting block on the rear side.

[0014] Preferably, the connection structure is an upper plane connector, which includes an upper plane connecting plate, a front baffle fixedly connected to the front end of the lower surface of the upper plane connecting plate, and a connecting block fixedly connected between the rear end of the front baffle and the lower end of the upper plane connecting plate. The bottom of the connecting block is provided with a lower slot, which cooperates with the connecting shaft. The two ends of the front baffle abut against the front surfaces of the two end chain plates respectively.

[0015] Preferably, the connecting structure is a self-connecting hook, the tail end of which is provided with an assembly hole that mates with the connecting shaft, and the head is provided with a downwardly curved hook structure. The front end face of the hook structure is a slope that is inclined forward and downward. A torsion spring is provided between the assembly hole and the connecting shaft to reset the self-connecting hook.

[0016] The self-guided push chain device based on a light-load or heavy-load push chain of this invention has the following advantages:

[0017] (1) This new type of push chain guide rail is built-in, which avoids the situation of push chain being used without guidance. When it extends a long distance, the push chain will still move completely along the push chain guide rail without bending or becoming unstable. Within the guide range of the push chain guide rail, it can meet the needs of pushing and pulling objects with any stroke.

[0018] (2) The T-shaped guide rail of this invention is located below the push chain, which occupies very little space and does not occupy the space through which the push chain passes above it. Therefore, objects that need to be pushed or pulled can be placed at the same level as the push chain, saving space and improving space utilization.

[0019] (3) The E-shaped guide rail, T-shaped guide rail, upper plane connector, and self-connecting hook of this new type can be used in both the upper and lower placement of the push chain limit block, and are versatile. They can be flexibly installed in different application scenarios and are not limited to a single installation method. Attached Figure Description

[0020] Figure 1 A schematic diagram of the placement method of this new type using an E-shaped guide rail and a push chain with a limiting block on top;

[0021] Figure 2 A schematic diagram of the placement method of this new type using an E-shaped guide rail and a push chain with a limiting block at the bottom;

[0022] Figure 3 A schematic diagram illustrating the placement of the push chain with a limit block at the top using a T-shaped guide rail;

[0023] Figure 4 A schematic diagram of the placement method of this new type using a T-shaped guide rail and a push chain with a limiting block at the bottom;

[0024] Figure 5 A schematic diagram showing the new type of drive box guide rail plate extending to the outside of the outlet for guidance;

[0025] Figure 6 A schematic diagram of the limiting block of the push chain of this novel invention engaging with the E-shaped guide rail when it is at the top;

[0026] Figure 7 A schematic diagram of the limiting block of the push chain of this novel invention cooperating with the E-shaped guide rail when it is at the bottom;

[0027] Figure 8 A schematic diagram of the limiting block of the push chain of this novel invention cooperating with the T-shaped guide rail when it is at the top;

[0028] Figure 9 A schematic diagram of the limiting block of the push chain of this novel invention cooperating with the T-shaped guide rail when it is at the bottom;

[0029] Figure 10 A schematic diagram of the end link of the push chain of this novel invention;

[0030] Figure 11 A schematic diagram of the upper plane connector of this novel invention;

[0031] Figure 12 A schematic diagram of the guide rail structure after the chain box and drive box are opened.

[0032] Markings in the diagram: 1. Chain box; 11. Chain box guide plate; 2. Drive box; 21. Outlet; 22. Drive box guide plate; 221. First guide plate; 222. Second guide plate; 23. Sprocket; 3. Push chain body; 31. Heavy-duty chain structure; 32. Light-duty chain structure; 33. Middle roller; 34. Outer roller; 35. Limiting block; 36. Pin; 361. Connecting shaft; 37. L-shaped slider; 371. First L-shaped slider; 37 2. Second L-shaped slider; 373. Horizontal section; 38. End link; 381. End chain plate; 382. End chain plate limiting block; 39. Side roller; 4. Push chain guide rail; 41. E-shaped guide rail; 411. C-shaped groove; 412. Middle guide plate; 42. T-shaped guide rail; 421. Guide side edge; 5. Connecting structure; 51. Upper plane joint; 511. Lower slot; 512. Front baffle; 513. Upper plane connecting plate; 52. Self-connecting hook. Detailed Implementation

[0033] The following is a detailed description of the embodiments of the present invention in a step-by-step manner. This description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0034] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this invention.

[0035] Example 1

[0036] A self-guided push chain device based on a light-load or heavy-load push chain includes a chain box 1 for storing the push chain body, a drive box 2 connected to one end of the chain box 1 for driving the extension and retraction of the push chain body, and a push chain guide rail connected to the outside of the drive box 2 for guiding the push chain body. The push chain body is a push chain composed of a light-load chain structure or a heavy-load chain structure. The end of the push chain body is connected to an end link 38, and the end link 38 is connected to a connecting structure for connecting with the pushed object.

[0037] In this embodiment, as Figure 12As shown, the chain box 1 is used to store the push chain body 3. The chain box 1 is equipped with a coiled guide rail. The push chain body 3 rolls with the guide rail and is stored in the chain box 1 along the guide rail. The specific structure of the guide rail is that two guide rail plates are arranged side by side in the chain box. The guide rail plates are provided with guide rails that cooperate with the side rollers. The push chain body rolls with the guide rails on both sides through the two side rollers to precisely limit the position and trajectory of the push chain body. The drive box guide rail plate in the drive box cooperates with the middle roller to drive the push chain body to extend and retract through the motor. The drive box guide rail plate forms a push chain output channel inside the drive box outlet. The push chain body extends out from the outlet of the drive box and then cooperates with the push chain guide rail outside the drive box. Based on existing technology, the drive box transmits power through the meshing of sprockets and the push chain body. The sprockets are located inside the drive box and on one side of the push chain body, meshing with it (the sprockets are a double sprocket structure, with the two sprockets respectively engaging with the two side rollers 39 of the push chain body; or the sprockets are a four-sprocket structure, with the four sprockets meshing with the two side rollers 39 and two outer rollers 34 of the push chain body). The central shaft of the sprockets is connected to a drive motor, which drives the push chain body to extend and retract. The push chain body is a push chain constructed from a light-load or heavy-load chain structure of a push chain lifting platform disclosed in CN120308891A, the detailed structure of which can be found in that patent document. Contents not described in this invention are addressed using existing solutions.

[0038] Example 2

[0039] Based on Embodiment 1, this embodiment discloses one implementation method of the push chain guide: such as Figure 5 As shown, the push chain guide rail is a drive box guide rail plate 22 extending outward along the drive box 2. The drive box guide rail plate 22 includes a first guide rail plate 221 and a second guide rail plate 222 arranged opposite to each other. The opposite ends of the first guide rail plate 221 and the second guide rail plate 222 form a guide space for the push chain body 3 to pass through. The middle roller 33 (equivalent to the roller in CN120308891A) of the light-load chain structure or heavy-load chain structure rolls with the opposite ends of the first guide rail plate and the second guide rail plate.

[0040] When the push chain 3 has a short stroke or moves up and down, the drive box guide plate can be extended to the outside of the outlet to increase the length of the straight section that rolls with the middle roller, thus providing guidance for the push chain.

[0041] Example 3

[0042] Based on Embodiment 1, this embodiment discloses one implementation method of the push chain guide: such as Figure 1 , 2As shown in Figures 6 and 7, the push chain guide rail is an E-shaped guide rail 41. The E-shaped guide rail 41 includes a C-shaped groove 411 and a central guide plate 412 located in the middle of the bottom of the inner surface of the C-shaped groove 411. The middle roller 33 of the heavy-duty chain structure rolls with the central guide plate 412. The limiting block 35 of the heavy-duty chain structure (equivalent to the combination structure of the first chain plate and the second chain plate in CN120308891A) is located inside or outside the C-shaped groove 411. The outer roller 34 of the heavy-duty chain structure (equivalent to the second roller in CN120308891A) rolls with the top inner surfaces of the two side walls of the C-shaped groove 411 respectively.

[0043] In this embodiment, the heavy-duty chain structure extends from the outlet 21 of the drive box into the interior of the E-shaped guide rail, maintaining linear movement under the guidance of the E-shaped guide rail and preventing bending and instability. The E-shaped guide rail 41 can be positioned with the limit block 35 on top or on the bottom; both reversed placements allow for normal movement.

[0044] Example 4

[0045] Based on Embodiment 1, this embodiment discloses one implementation method of the push chain guide: such as Figure 3 , 4 As shown in Figures 8 and 9, the push chain guide rail is a T-shaped guide rail 42. The cross-section of the T-shaped guide rail 42 is an inverted "convex" shape. The two shoulders of the T-shaped guide rail 42 form a guide side rim 421. The two sides of the light-load chain structure are respectively connected to L-shaped sliders 371 that slide in cooperation with the guide side rim 421. The middle roller 33 of the light-load chain structure rolls in cooperation with the top of the T-shaped guide rail 42.

[0046] like Figure 8 As shown, the two ends of the pin 36 of the light-load chain are respectively connected to the first L-shaped slider 371 (at this time, the limiting block is on top); or as... Figure 9 As shown, a second L-shaped slider 372 is connected to the outer end of the limiting block 35 of the light-load chain (at this time, the limiting block is below).

[0047] This embodiment discloses a T-shaped guide rail that works with a light-load chain structure. By setting an L-shaped slider, the light-load chain structure can move stably and linearly along the T-shaped guide rail after extending out of the drive box outlet.

[0048] Example 5

[0049] Based on Embodiment 1, this embodiment discloses an implementation method for the end link, such as... Figure 10As shown: The end link 38 includes two opposing end links 381. Each end link 381 has two connecting holes, which replace the limiting blocks on the same side of the heavy-duty or light-duty chain structure. The two connecting holes are clearance-fitted with the corresponding pins 36. A middle roller 33 is clearance-fitted in the middle of the pin. Side rollers that are clearance-fitted with the pin are provided on both sides of the middle roller and on the inner side of the end link 381. Washers are provided at both ends of the pin on the outer side of the end link 381. A mounting groove is provided on the shaft wall of the pin on the outer side of the washers. An elastic retaining ring is provided in the mounting groove. The inner surface of the elastic retaining ring abuts against the outer surface of the outermost washer of the pin (restricting the axial movement of the end link 381). A connecting shaft 361 (for connecting with the connecting structure) is also connected between the front ends of the two opposing end links 381. An end link limiting block 382 is provided at the rear end of the end link 381 to cooperate with the adjacent limiting block on the rear side.

[0050] like Figure 3-4 As shown, the fit between the end chain plate limiting block and the adjacent limiting block on the rear side is the same as the fit between the adjacent limiting blocks on the front and rear sides, so as to achieve rigidity between the push chain body and the end chain link and prevent the push chain body and the end chain link from rotating in opposite directions. The connecting shaft constitutes a component connected to the connecting structure.

[0051] Example 6

[0052] Based on Example 5, this example discloses: Figure 1 , 2 As shown in Figure 11, the connecting structure 5 is an upper plane connector 51. The upper plane connector 51 includes an upper plane connecting plate 513, a front baffle 512 fixedly connected to the front end of the lower surface of the upper plane connecting plate 513, and a connecting block fixedly connected between the rear end of the front baffle 512 and the lower end of the upper plane connecting plate 513. The bottom of the connecting block is provided with a lower slot 511, which cooperates with the connecting shaft 361. The two ends of the front baffle 512 abut against the front surfaces of the two end chain plates respectively to prevent the upper plane connector from swinging left and right and back and forth.

[0053] Example 7

[0054] Based on Example 5, this example discloses: Figure 3 , 4 As shown, the connecting structure is a self-connecting hook 52. The tail end of the self-connecting hook 52 is provided with an assembly hole that mates with the connecting shaft 361, and the head is provided with a downwardly curved hook structure. The front end face of the hook structure is a slope that is inclined forward and downward. A torsion spring is provided between the assembly hole and the connecting shaft 631 to reset the self-connecting hook 52.

[0055] When using the self-connecting hook, connect it to the head of the end link and use it in conjunction with the T-shaped guide rail. It can contact the hanging ring connected to the tail end of the object being pushed or pulled through the inclined plane. Under the force transmitted by the inclined plane, the self-connecting hook tilts upward. Then, under the action of the torsion spring, the hook structure is locked into the hanging ring, realizing the connection between the push chain body and the object being pushed or pulled.

Claims

1. A self-guided push chain device based on a light-load or heavy-load push chain, characterized in that: The device includes a chain box for storing the push chain body, a drive box connected to one end of the chain box for driving the push chain body to extend and retract, and a push chain guide rail connected to the outside of the drive box for guiding the push chain body. The push chain body is a push chain composed of a light-load chain structure or a heavy-load chain structure. The end of the push chain body is connected to an end link, and the end link is connected to a connecting structure for connecting with the object being pushed.

2. The self-guiding push chain device based on a light-load or heavy-load push chain as described in claim 1, characterized in that: The push chain guide rail is a drive box guide rail plate extending outward along the drive box. The drive box guide rail plate includes a first guide rail plate and a second guide rail plate arranged opposite to each other. The opposite ends of the first guide rail plate and the second guide rail plate form a guide space for the push chain body to pass through. The middle roller of the light-load chain structure or the heavy-load chain structure rolls in cooperation with the opposite ends of the first guide rail plate and the second guide rail plate.

3. The self-guiding push chain device based on a light-load or heavy-load push chain as described in claim 1, characterized in that: The push chain guide rail is an E-shaped guide rail, which includes a C-shaped groove and a central guide plate located in the middle of the bottom of the inner surface of the C-shaped groove. The middle roller of the heavy-duty chain structure rolls with the central guide plate. The limiting block of the heavy-duty chain structure is located inside or outside the C-shaped groove. The outer roller of the heavy-duty chain structure rolls with the top inner surfaces of the two side walls of the C-shaped groove.

4. The self-guiding push chain device based on a light-load or heavy-load push chain as described in claim 1, characterized in that: The push chain guide rail is a T-shaped guide rail with an inverted "convex" cross-section. The two shoulders of the T-shaped guide rail form guide side eaves. The two sides of the light-load chain structure are respectively connected to L-shaped sliders that slide with the guide side eaves. The middle roller of the light-load chain structure rolls with the top of the T-shaped guide rail.

5. A self-guiding push chain device based on a light-load or heavy-load push chain as described in claim 4, characterized in that: The light-load chain has a first L-shaped slider connected to both ends of the pin shaft, or a second L-shaped slider connected to the outer end of the limiting block of the light-load chain.

6. A self-guided push chain device based on a light-load or heavy-load push chain as described in any one of claims 1-5, characterized in that: The end link includes two opposing end plates. Each end plate has two connecting holes, which replace the limiting blocks on the same side of the heavy-duty or light-duty chain structure. The two connecting holes are clearance-fitted with corresponding pins. A central roller is clearance-fitted in the middle of the pin. Side rollers that clearance-fit the pin are located on both sides of the central roller and inside the end plate. Washers are provided at both ends of the pin on the outer side of the end plate. The pin has a mounting groove on the shaft wall outside the washers. An elastic retaining ring is provided in the mounting groove. The inner surface of the elastic retaining ring abuts against the outer surface of the outermost washer of the pin. A connecting shaft is also connected between the front ends of the two opposing end plates. An end plate limiting block is provided at the rear end of the end plate to cooperate with the adjacent limiting block on the rear side.

7. A self-guiding push chain device based on a light-load or heavy-load push chain as described in claim 6, characterized in that: The connection structure is an upper plane connector (51), which includes an upper plane connecting plate, a front baffle fixedly connected to the front end of the lower surface of the upper plane connecting plate, and a connecting block fixedly connected between the rear end of the front baffle and the lower end of the upper plane connecting plate. The bottom of the connecting block is provided with a lower slot, which cooperates with the connecting shaft. The two ends of the front baffle abut against the front surfaces of the two end chain plates respectively.

8. A self-guided push chain device based on a light-load or heavy-load push chain as described in claim 6, characterized in that: The connecting structure is a self-connecting hook. The tail end of the self-connecting hook is provided with an assembly hole that mates with the connecting shaft, and the head is provided with a downwardly curved hook structure. The front end face of the hook structure is a slope that is inclined forward and downward. A torsion spring is provided between the assembly hole and the connecting shaft to reset the self-connecting hook.

Images