A transition drive mechanism and a conveying device

Abstract

The present application belongs to the technical field of transition drive mechanism of conveying equipment, and particularly relates to a transition drive mechanism and a conveying equipment, which comprises a transition drive wheel assembly installed at the end of a drive chain, the drive chain being used to convey a carrier to the transition drive wheel assembly; the transition drive wheel assembly comprises a chain roller, a first guide rod, a first friction wheel and a second friction wheel, the chain roller is meshed and connected with the drive chain through the teeth arranged on the outer wheel surface, the first guide rod is arranged in the axial direction of the chain roller, the first friction wheel and the second friction wheel are positionally adjusted and arranged on the first guide rod, the first friction wheel and the second friction wheel are both abutted with the bottom of the carrier, and the transition drive wheel assembly is used to transition the carrier from the current drive chain to another adjacent drive chain, the present scheme provides a transition drive mechanism which is simple in structure, convenient to maintain, stable and reliable.

Description

Technical Field

[0001] This invention belongs to the technical field of transition drive mechanisms for conveying equipment, and specifically relates to a transition drive mechanism and a conveying equipment. Background Technology

[0002] In production workshops, to ensure continuous production, accumulating conveyor systems are installed between production lines. This allows the unaffected production lines to continue operating even if equipment upstream or downstream malfunctions. The key conveying mechanism of these accumulating conveyors is the chain conveyor. This chain conveyor creates a gap at the chain tensioning mechanism. The conveyor typically has only one drive point in contact with the chain. When this drive point reaches the gap, it disengages from the chain, causing the conveyor to lose power. In this situation, a transition drive mechanism is needed to allow the conveyor to continue transporting the vehicle across the gap.

[0003] Currently, most manufacturers use a transition drive method that typically involves adding a chain power application point to the conveyor, i.e., adding a small friction sprocket. If this method is adopted, since each device has a large number of carriers, if a small friction sprocket and mounting parts are added to each carrier, the equipment cost will increase significantly, and the maintenance and repair costs of the equipment will also increase accordingly. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a transition drive mechanism and a conveying device to solve the problem that the transition drive method of the prior art requires adding a small friction sprocket and mounting parts to each conveying carrier, which greatly increases the equipment cost and the maintenance and repair costs of the equipment.

[0005] One aspect of the present invention provides a transition drive mechanism, comprising: a transition drive wheel assembly mounted on the end of a drive chain, the drive chain being used to transport a carrier to a preset workstation;

[0006] The transition drive wheel assembly includes a chain roller, a first guide rod, a first friction wheel, and a second friction wheel. The chain roller is engaged with the drive chain through teeth on its outer surface. The first guide rod is disposed in the axial direction of the chain roller. The first friction wheel and the second friction wheel are slidably disposed along the length direction of the first guide rod. Both the first friction wheel and the second friction wheel abut against the bottom of the carrier. The transition drive wheel assembly is used to transition the carrier from the current drive chain to another adjacent drive chain.

[0007] In one embodiment of the present invention, a small sprocket and a transition slide are installed at the bottom of the carrier. The small sprocket is engaged with the drive chain through the teeth on its outer wheel surface. The drive chain drives the carrier to move along the conveying direction of the drive chain through the small sprocket.

[0008] The transition slide plate extends in the same direction as the drive chain, and the transition slide plate is lower than the lower end of the small sprocket.

[0009] In this design, a receiving groove is formed by a first friction wheel and a second friction wheel to clamp the transition slide plate. Under the action of the clamping force, friction is generated, and the transition drive wheel assembly continues to drive the carrier forward through friction until the small sprocket position advances to the end of the chain docking gap and reaches the other end of the drive chain and contacts the adjacent drive chain. At this time, the carrier can regain forward momentum, which is provided by the drive chain on the other side of the current drive chain, realizing the transmission of the carrier on the other drive chain. Therefore, this design provides a transition drive mechanism that is simple in structure, easy to maintain, stable and reliable.

[0010] In one embodiment of the present invention, the first friction wheel and the second friction wheel form a receiving groove, and the transition slide passes through the receiving groove along the moving path of the drive chain conveying direction;

[0011] When the carrier reaches the transition drive wheel assembly, the transition slide plate enters the receiving groove, and the first friction wheel and the second friction wheel respectively abut against the two sides of the transition slide plate. The first friction wheel and the second friction wheel push the transition slide plate through the receiving groove so that the carrier exits the transition drive wheel assembly.

[0012] In this design, one side of each of the first and second friction wheels together forms a receiving groove. The receiving groove opens and closes by axial sliding of the second friction wheel. The closing of the receiving groove has a certain closing clamping force. In this design, the closing clamping force is provided by an elastic element, which can be applied to transition slides of different thicknesses.

[0013] In one embodiment of the present invention, the transition drive wheel assembly further includes: a second guide rod and a first end cap, one end of the second guide rod being disposed on the side of the first friction wheel facing the second friction wheel, and the other end being fixedly connected to the first end cap; the first friction wheel, the second guide rod and the first end cap constitute a floating unit, and the floating unit is slidably disposed on the first guide rod.

[0014] In this design, the floating unit can reciprocate along the axial direction of the first guide rod to adapt to the left-right deviation of the carrier's position as it moves forward.

[0015] In one embodiment of the present invention, the transition drive wheel assembly further includes an adjusting limit ring disposed between the first friction wheel and the second friction wheel, wherein the width of the receiving groove can be adjusted by replacing the adjusting limit ring.

[0016] In this scheme, changing the thickness of the adjusting limit ring can change the initial width of the receiving groove.

[0017] In one embodiment of the present invention, the transition drive wheel assembly further includes an elastic element, which is movably sleeved on the second guide rod, and the two ends of the elastic element respectively abut against the first end cap and the second friction wheel.

[0018] In this solution, the elastic element is used to provide clamping force for the receiving groove formed by the first friction wheel and the second friction wheel.

[0019] In one embodiment of the present invention, the second friction wheel is provided with a plurality of first through holes arranged in a circular pattern along the axial direction, and at least two second guide rods are provided, with the second guide rods passing through the first through holes, and the second friction wheel can reciprocate along the axial direction of the second guide rods.

[0020] In this solution, the first through hole is used to allow the second friction wheel to reciprocate along the axial direction of the second guide rod. Under the elastic force of the elastic element, the receiving groove formed by the second friction wheel and the first friction wheel clamps the transition slide plate at the bottom of the carrier by friction clamping.

[0021] In one embodiment of the present invention, at least two first guide rods are provided, and the first friction wheel, the second friction wheel, the first end cap, and the adjusting limiting ring are provided with a plurality of second through holes distributed in a circular pattern along the axial direction.

[0022] The first friction wheel, the second friction wheel, the first end cap, and the second through hole on the adjusting limiting ring are coaxially corresponding and have the same number as the first guide rod. The first guide rod passes through the second through hole, and the second through hole is used to allow the floating unit formed by the connection and fixation of the first friction wheel, the second guide rod, and the first end cap to reciprocate along the axial direction of the first guide rod.

[0023] In this design, the floating unit can slide freely axially on the first guide rod to accommodate the left-right deviation of the carrier's position as it moves forward, ensuring that the carrier can maintain its original direction of transport and preventing the positional deviation from affecting the transport and the contact wear of the floating unit.

[0024] In one embodiment of the present invention, a second end cap is fixedly provided at the end of the first guide rod away from the chain roller, and the second end cap is used to limit the maximum sliding stroke of the floating unit.

[0025] In this design, the second end cap is used to prevent the floating unit from exceeding the range of the first guide rod due to deviations in the left and right directions of the carrier's position during forward movement, thus ensuring that the carrier can be transported in its original direction.

[0026] One embodiment of the present invention also discloses a conveying device, including a base plate, a driven roller, a drive chain, a tensioning mechanism, and a transition drive mechanism, wherein the transition drive mechanism adopts any one of the above embodiments, and the transition drive mechanism includes a transition drive wheel assembly.

[0027] The base plate is mounted and fixed on the equipment frame, and at least two drive chains are connected and arranged sequentially along the length direction. The drive chain has an upper surface for realizing the forward transport of the carrier in the length direction of the drive chain and a lower surface for realizing the reverse transport of the carrier in the length direction of the drive chain.

[0028] The driven roller and the transition drive wheel assembly are respectively disposed on the upper and lower sides of the base plate relative to the conveying direction of the drive chain. The drive chain is arranged to surround the transition drive wheel assembly and the driven roller in sequence. The driven roller and the transition drive wheel assembly are connected to the drive chain in a transmission manner. The transition drive wheel assembly is used to transition the carrier from the current drive chain to another adjacent drive chain.

[0029] The tensioning mechanism is mounted and fixed on the equipment frame, and the tensioning end of the tensioning mechanism meshes and rotates with the drive chain. The tensioning mechanism is used to pull the drive chain through the tensioning end to adjust the tension of the drive chain.

[0030] In one embodiment of the present invention, between any two adjacent drive chains, a transition drive mechanism is provided at the end of the upper surface of one drive chain facing the upper surface of the adjacent drive chain, for conveying the carrier from the upper surface of the current drive chain to the upper surface of the adjacent drive chain; wherein a transition drive mechanism is provided at the end of the lower surface of any one drive chain facing the lower surface of the adjacent drive chain, for conveying the carrier from the lower surface of the current drive chain to the lower surface of the adjacent drive chain;

[0031] Alternatively, a transition drive mechanism may be provided at the end of the upper surface of any two adjacent drive chains, for transferring the carrier from the upper surface of one drive chain to the upper surface of the other drive chain via the two adjacent transition drive mechanisms; and a transition drive mechanism may be provided at the end of the lower surface of any two adjacent drive chains, for transferring the carrier from the lower surface of one drive chain to the lower surface of the other drive chain via the two adjacent transition drive mechanisms. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0033] Figure 1 This is a front view of a transition drive mechanism according to the present invention;

[0034] Figure 2 A perspective view showing a transition drive mechanism according to the present invention;

[0035] Figure 3 This is a schematic diagram illustrating an example of the tray structure of the present invention;

[0036] Figure 4 This diagram illustrates the structure of the transition drive wheel assembly of the present invention.

[0037] Figure 5 A schematic diagram showing the rotating unit structure of the transition drive wheel assembly of the present invention;

[0038] Figure 6 This is a schematic diagram of the floating unit structure of the transition drive wheel assembly of the present invention.

[0039] The symbols in the attached image are explained as follows:

[0040] 1-Base plate;

[0041] 2-Driven roller;

[0042] 3-Drive chain;

[0043] 4-Transition drive wheel assembly; 401-Chain roller; 402-First guide rod; 403-First friction wheel; 404-Second friction wheel; 405-Second guide rod; 406-First end cap; 407-Adjusting limit ring; 408-Elastic element; 409-Second end cap;

[0044] 5-Carrier; 501-Small sprocket; 502-Transition slide plate;

[0045] 6-Tensioning mechanism. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0047] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0048] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0049] Please refer to Figures 1-6 One embodiment of the present invention provides a transition drive mechanism, including: a transition drive wheel assembly 4 installed at the end of a drive chain 3, wherein the drive chain 3 is used to transport a carrier 5 to a preset work station;

[0050] The transition drive wheel assembly 4 includes a chain roller 401, a first guide rod 402, a first friction wheel 403, and a second friction wheel 404. The chain roller 401 is engaged with the drive chain 3 through teeth on its outer surface. The first guide rod 402 is disposed in the axial direction of the chain roller 401. The first friction wheel 403 and the second friction wheel 404 are slidably disposed along the length direction of the first guide rod 402. Both the first friction wheel 403 and the second friction wheel 404 abut against the bottom of the carrier 5. The transition drive wheel assembly 4 is used to transition the carrier 5 from the current drive chain 3 to another adjacent drive chain 3.

[0051] Please refer to Figure 3 In one embodiment of the present invention, a small sprocket 501 and a transition slide plate 502 are installed at the bottom of the carrier 5. The small sprocket 501 is meshed with the drive chain 3 through the teeth on its outer wheel surface. The drive chain 3 drives the carrier 5 to move along the conveying direction of the drive chain 3 through the small sprocket 501.

[0052] The length extension direction of the transition slide plate 502 is consistent with the conveying direction of the drive chain 3, and the transition slide plate 502 is lower than the lower end of the small sprocket 501.

[0053] In this embodiment, a receiving groove is formed by the first friction wheel and the second friction wheel to clamp the transition slide plate. Under the action of the clamping force, friction is generated. The transition drive wheel assembly continues to drive the carrier forward through the friction until the small sprocket position advances to pass the chain docking gap and reaches the other end of the drive chain and contacts the adjacent drive chain. At this time, the carrier can regain forward momentum, which is provided by the drive chain on the other side of the current drive chain, realizing the transmission of the carrier on the other drive chain. Therefore, this embodiment provides a transition drive mechanism that is simple in structure, easy to maintain, stable and reliable.

[0054] Please refer to Figure 6 In one embodiment of the present invention, the side surface between the first friction wheel 403 and the second friction wheel 404 forms a receiving groove, and the transition slide plate 502 passes through the receiving groove along the moving path of the drive chain 3 in the conveying direction.

[0055] When the carrier 5 reaches the transition drive wheel assembly 4, the transition slide plate 502 enters the receiving groove, and the first friction wheel 403 and the second friction wheel 404 respectively abut against the two sides of the transition slide plate 502. The first friction wheel 403 and the second friction wheel 404 push the transition slide plate 502 through the receiving groove so that the carrier exits the transition drive wheel assembly.

[0056] In this embodiment, one side of each of the first friction wheel and the second friction wheel together form a receiving groove. The receiving groove opens and closes by axial sliding of the second friction wheel. The closing of the receiving groove has a certain closing clamping force. In this embodiment, the closing clamping force is provided by an elastic element, which can be applied to transition slides of different thicknesses.

[0057] Please refer to Figure 6 In one embodiment of the present invention, the transition drive wheel assembly 4 further includes: a second guide rod 405 and a first end cap 406. One end of the second guide rod 405 is disposed on the side of the first friction wheel 403 facing the second friction wheel 404, and the other end is fixedly connected to the first end cap 406. The first friction wheel 403, the second guide rod 405 and the first end cap 406 constitute a floating unit. The floating unit is slidably disposed on the first guide rod 402, and the floating unit can reciprocate along the axial direction of the first guide rod 402.

[0058] In this embodiment, the floating unit can reciprocate along the axial direction of the first guide rod to adapt to the left-right deviation of the carrier's position when it moves forward.

[0059] Please refer to Figure 6 In one embodiment of the present invention, the transition drive wheel assembly 4 further includes an adjustment limiting ring 407 disposed between the first friction wheel 403 and the second friction wheel 404, and the width of the receiving groove can be adjusted by replacing the adjustment limiting ring 407.

[0060] In this embodiment, changing the thickness of the adjusting limiting ring can change the initial width of the receiving groove.

[0061] Please refer to Figure 6 In one embodiment of the present invention, the transition drive wheel assembly 4 further includes an elastic element 408, which is movably sleeved on the second guide rod 405, and the two ends of the elastic element 408 respectively abut against the first end cap 406 and the second friction wheel 404. The elastic element 408 is used to provide a bearing force for the receiving groove formed by the first friction wheel 403 and the second friction wheel 404.

[0062] In this embodiment, the elastic element is used to provide clamping force for the receiving groove formed by the first friction wheel and the second friction wheel.

[0063] In one embodiment of the present invention, the second friction wheel 404 is provided with a plurality of first through holes arranged in a circular pattern along the axial direction, and at least two second guide rods 405 are provided, and the second guide rods 405 pass through the first through holes, and the second friction wheel 404 can reciprocate along the axial direction of the second guide rods 405.

[0064] In this embodiment, the first through hole is used to allow the second friction wheel to reciprocate along the axial direction of the second guide rod. Under the elastic force of the elastic element, the receiving groove formed by the second friction wheel and the first friction wheel clamps the transition slide plate at the bottom of the carrier by friction clamping.

[0065] In one embodiment of the present invention, at least two first guide rods 402 are provided, and the first friction wheel 403, the second friction wheel 404, the first end cap 406, and the adjusting limiting ring 407 are provided with a plurality of second through holes distributed in a circular pattern along the axial direction.

[0066] The first friction wheel 403, the second friction wheel 404, the first end cap 406, and the second through hole on the adjusting limit ring 407 are coaxially corresponding and have the same number as the first guide rod 402. The first guide rod 402 passes through the second through hole, and the second through hole is used to allow the floating unit formed by connecting and fixing the first friction wheel 403, the second guide rod 405, and the first end cap 406 to reciprocate along the axial direction of the first guide rod 402.

[0067] In this embodiment, the floating unit can slide freely axially on the first guide rod to adapt to the deviation of the carrier's position in the left and right directions when it moves forward, so that the carrier can maintain its original direction of transport and will not be affected by position deviation, thus preventing contact wear of the floating unit.

[0068] Please refer to Figure 4 In one embodiment of the present invention, a second end cap 409 is fixedly provided at the end of the first guide rod 402 away from the chain roller 401, and the second end cap 409 is used to limit the maximum sliding stroke of the floating unit.

[0069] In this embodiment, the second end cap 409 is used to prevent the floating unit from exceeding the range of the first guide rod due to the deviation of the carrier's position in the left and right directions when it moves forward, so that the carrier can be transported in its original direction.

[0070] Please refer to Figures 1-2 In one embodiment of the present invention, a conveying device is also provided, including a base plate 1, a driven roller 2, a drive chain 3, a tensioning mechanism 6, and a transition drive mechanism. The transition drive mechanism adopts any one of the transition drive mechanisms described in the above embodiments, and the transition drive mechanism includes a transition drive wheel assembly 4.

[0071] The base plate 1 is fixed on the equipment frame, and at least two drive chains 3 are connected and arranged in sequence along the length direction. The drive chain 3 has an upper surface for realizing the forward transport of the carrier 5 in the length direction of the drive chain 3 and a lower surface for realizing the reverse transport of the carrier 5 in the length direction of the drive chain 3.

[0072] The driven roller 2 and the transition drive wheel assembly 4 are respectively disposed on the upper and lower sides of the base plate 1 relative to the conveying direction of the drive chain 3. The drive chain 3 is arranged to surround the transition drive wheel assembly 4 and the driven roller 2 in sequence. The driven roller 2 and the transition drive wheel assembly 4 are connected to the drive chain 3 in a transmission manner. The transition drive wheel assembly 4 is used to transition the carrier 5 from the current drive chain 3 to another adjacent drive chain 3.

[0073] The tensioning mechanism 6 is mounted and fixed on the equipment frame, and the tensioning end of the tensioning mechanism 6 meshes with and rotates with the drive chain 3. The tensioning mechanism 6 is used to pull the drive chain 3 through the tensioning end to adjust the tension of the drive chain 3.

[0074] In this embodiment, the base plate 1 is fixedly mounted on the equipment frame. A drive chain 3 is provided on each of the left and right sides of the base plate 1. The components and mounting structures on both sides are identical, differing only in position due to the different conveying directions. For example, on the left side, the driven roller 2 and the transition drive wheel assembly 4 are mounted on the base plate 1. The tensioning mechanism 6 is located at the end of the current drive chain 3 facing the adjacent drive chain 3. The drive chain 3 sequentially passes over the driven roller 2, the transition drive wheel assembly 4, and the roller of the tensioning mechanism 6 to form a closed loop. The drive chain 3 has a tensioned end. The end position forms an inwardly concave arc-shaped bend, with the tensioning end located at the bottom of the arc-shaped bend. The tensioning end adjusts the length of the arc-shaped bend within a predetermined stroke range. The tensioning mechanism 6 is mounted on the frame and can move horizontally. The tensioning end (such as a tensioning roller) of the tensioning mechanism 6 can achieve tensioning of the drive chain 3 under the action of spring force. The driven roller 2, the transition drive wheel assembly 4, and the roller of the tensioning mechanism 6 are all driven to rotate synchronously by the drive chain 3. The drive chain 3 is used to transport the carrier 5. The transport direction of the carrier 5 is from left to right on the upper side of the equipment and from right to left on the lower side. The carrier 5 contacts the drive chain 3 through the small sprocket 501, and the drive chain 3 drives the carrier 5 forward.

[0075] As needed, the transition drive mechanism is provided with a ring of support rails on each side along the conveying direction. The support rails include arc-shaped rails at both ends of the drive chain 3 and straight rails in the middle of the drive chain 3, so as to prevent the pallet from falling when the carrier 5 is conveyed under the drive chain 3 and to increase the stability of pallet conveying. The carrier 5 is set in the two rings of the support rails. Rollers are provided on the side of the carrier 5 that contacts the support rails. The rollers abut against the support rails to support the carrier 5 within the support rails. The fixed sprocket at the bottom of the carrier 5 engages with the drive chain 3. The drive chain 3 drives the carrier 5 forward along the conveying direction of the support rails. The straight rails are provided with several working positions for processing operations. Each working position is also provided with a stopper to stop the conveyed carrier to the current working position. The single carrier 5 runs in a cycle within the support rails, or multiple carriers 5 form a series carrier group that runs in a cycle within the support rails.

[0076] In one embodiment of the present invention, between any two adjacent drive chains 3, a transition drive mechanism is provided at the end of the upper surface of one drive chain 3 facing the upper surface of the adjacent drive chain 3, for conveying the carrier 5 from the upper surface of the current drive chain 3 to the upper surface of the adjacent drive chain 3; wherein a transition drive mechanism is provided at the end of the lower surface of any one drive chain 3 facing the lower surface of the adjacent drive chain 3, for conveying the carrier 5 from the lower surface of the current drive chain 3 to the lower surface of the adjacent drive chain 3;

[0077] Alternatively, a transition drive mechanism may be provided at the end of the upper surface of any two adjacent drive chains 3, for transferring the carrier 5 from the upper surface of one drive chain 3 to the upper surface of another drive chain 3 through the two adjacent transition drive mechanisms; and a transition drive mechanism may be provided at the end of the lower surface of any two adjacent drive chains 3, for transferring the carrier 5 from the lower surface of one drive chain 3 to the lower surface of another drive chain 3 through the two adjacent transition drive mechanisms.

[0078] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A transition drive mechanism characterized by, include: A transition drive wheel assembly (4) is installed at the end of the drive chain (3), the drive chain (3) being used to transport the carrier (5) to a preset work station; The transition drive wheel assembly (4) includes a chain roller (401), a first guide rod (402), a first friction wheel (403), and a second friction wheel (404). The chain roller (401) is meshed with the drive chain (3) through teeth on its outer wheel surface. The first guide rod (402) is disposed in the axial direction of the chain roller (401). The first friction wheel (403) and the second friction wheel (404) are slidably disposed along the length direction of the first guide rod (402). The transition drive wheel assembly (4) is used to transition the carrier (5) from the current drive chain (3) to another adjacent drive chain (3). The chain roller (401) obtains rotational power through meshing with the drive chain (3), the first guide rod (402) rotates synchronously with the chain roller (401), and the transition drive wheel assembly (4) does not have an independent motor power source. A small sprocket (501) and a transition slide plate (502) are installed at the bottom of the carrier (5). The small sprocket (501) is connected to the drive chain (3) by the teeth on its outer wheel surface. The drive chain (3) drives the carrier (5) to move along the conveying direction of the drive chain (3) through the small sprocket (501). The length extension direction of the transition slide plate (502) is consistent with the conveying direction of the drive chain (3). The transition slide plate (502) is lower than the lower end of the small sprocket (501). The side surfaces between the first friction wheel (403) and the second friction wheel (404) form a receiving groove. The transition slide plate (502) moves along the conveying direction of the drive chain (3) through the receiving groove. When the carrier (5) reaches the transition drive wheel assembly (4), the transition slide plate (502) enters the receiving groove. The first friction wheel (403) and the second friction wheel (404) abut against the two sides of the transition slide plate (502) respectively. The first friction wheel (403) and the second friction wheel (404) push the transition slide plate (502) through the receiving groove so that the carrier (5) exits the transition drive wheel assembly. The transition drive wheel assembly (4) further includes: a second guide rod (405) and a first end cap (406). One end of the second guide rod (405) is disposed on the side of the first friction wheel (403) facing the second friction wheel (404), and the other end is fixedly connected to the first end cap (406). The first friction wheel (403), the second guide rod (405) and the first end cap (406) constitute a floating unit. The floating unit is slidably disposed on the first guide rod (402), and the floating unit can reciprocate along the axial direction of the first guide rod (402).

2. A transition drive mechanism as claimed in claim 1, characterized in that The transition drive wheel assembly (4) further includes an adjustment limiting ring (407) disposed between the first friction wheel (403) and the second friction wheel (404), which is used to adjust the width of the receiving groove by replacing the adjustment limiting ring (407).

3. A transition drive mechanism as claimed in claim 2, wherein The transition drive wheel assembly (4) further includes an elastic element (408), which is movably sleeved on the second guide rod (405), and the two ends of the elastic element (408) abut against the first end cap (406) and the second friction wheel (404) respectively. The elastic element (408) is used to provide clamping force for the receiving groove formed by the first friction wheel (403) and the second friction wheel (404).

4. A transition drive mechanism as described in claim 2, characterized in that, The second friction wheel (404) is provided with a plurality of first through holes arranged in a circular pattern along the axial direction. At least two second guide rods (405) are provided, and the second guide rods (405) pass through the first through holes. The second friction wheel (404) can reciprocate along the axial direction of the second guide rods (405).

5. A transition drive mechanism as described in claim 2, characterized in that, The first guide rod (402) is provided with at least two rods, and the first friction wheel (403), the second friction wheel (404), the first end cap (406), and the adjusting limiting ring (407) are provided with a plurality of second through holes distributed in a circular pattern along the axial direction; The second through holes on the first friction wheel (403), the second friction wheel (404), the first end cap (406), and the adjusting limiting ring (407) are coaxially corresponding and have the same number as the first guide rod (402). The first guide rod (402) passes through the second through hole, and the second through hole is used to allow the floating unit formed by connecting and fixing the first friction wheel (403), the second guide rod (405), and the first end cap (406) to reciprocate along the axial direction of the first guide rod (402).

6. A transition drive mechanism as described in claim 5, characterized in that, A second end cap (409) is fixedly provided at the end of the first guide rod (402) away from the chain roller (401), and the second end cap (409) is used to limit the maximum sliding stroke of the floating unit.

7. A conveying device, characterized in that, It includes a base plate (1), a driven roller (2), a drive chain (3), a tensioning mechanism (6), and a transition drive mechanism, wherein the transition drive mechanism adopts the transition drive mechanism according to any one of claims 1-6, and the transition drive mechanism includes a transition drive wheel assembly (4); The base plate (1) is installed and fixed on the equipment frame, and at least two drive chains (3) are connected and arranged in sequence along the length direction. The drive chain (3) has an upper surface for realizing the forward transport of the carrier (5) in the length direction of the drive chain (3) and a lower surface for realizing the reverse transport of the carrier (5) in the length direction of the drive chain (3). The driven roller (2) and the transition drive wheel assembly (4) are respectively disposed on the upper and lower sides of the base plate (1) relative to the conveying direction of the drive chain (3). The drive chain (3) is arranged to surround the transition drive wheel assembly (4) and the driven roller (2) in sequence. The driven roller (2) and the transition drive wheel assembly (4) are connected to the drive chain (3) in a transmission manner. The transition drive wheel assembly (4) is used to transition the carrier (5) from the current drive chain (3) to another adjacent drive chain (3). The tensioning mechanism (6) is installed and fixed on the equipment frame, and the tensioning end of the tensioning mechanism (6) meshes with the drive chain (3) and rotates. The tensioning mechanism (6) is used to pull the drive chain (3) through the tensioning end to adjust the tension of the drive chain (3).

8. A conveying device as described in claim 7, characterized in that, Between any two adjacent drive chains (3), a transition drive mechanism is provided at the end of the upper surface of one drive chain (3) facing the upper surface of the adjacent drive chain (3) for conveying the carrier (5) from the upper surface of the current drive chain (3) to the upper surface of the adjacent drive chain (3); and a transition drive mechanism is provided at the end of the lower surface of any one drive chain (3) facing the lower surface of the adjacent drive chain (3) for conveying the carrier (5) from the lower surface of the current drive chain (3) to the lower surface of the adjacent drive chain (3). Alternatively, a transition drive mechanism may be provided at the end of the upper surface of any two adjacent drive chains (3) for transferring the carrier (5) from the upper surface of one drive chain (3) to the upper surface of another drive chain (3) through two adjacent transition drive mechanisms; and a transition drive mechanism may be provided at the end of the lower surface of any two adjacent drive chains (3) for transferring the carrier (5) from the lower surface of one drive chain (3) to the lower surface of another drive chain (3) through two adjacent transition drive mechanisms.

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