A delivery device

Abstract

The application discloses a conveying device, which comprises a track and a group of carriers running along the track for loading products, and further comprises at least two coaxially arranged driving turntables with different specifications; the track is provided with a circular arc segment, and the circular arc segment is arranged around the driving turntable with the center of the driving turntable as the center; a driven turntable which can only be transmissionally matched with one of the driving turntables is arranged on the carrier, the driven turntable is rotationally arranged in the carrier, and the product is coaxially arranged with the driven turntable and synchronously rotated. The application is characterized in that a plurality of coaxially arranged driving turntables with different specifications are adopted, and the structure design of the specification matching or axial position adjustment of the driven turntable on the carrier is adopted, so that when the products on the same conveying line pass through the same station, different transmission ratios can be formed and differentiated self-rotation speeds can be obtained, and the conveying and processing of the products with various self-rotation process requirements can be simultaneously completed at the same station of a single conveying line, and the flexible production capacity of the assembly line is effectively improved.

Description

Technical Field

[0001] This invention relates to equipment for assembly lines, and more particularly to conveying devices for products on assembly lines. Background Technology

[0002] Automated production lines are the core conveying carriers for modern intelligent manufacturing, parts processing, painting, and inspection processes. They rely on belt, roller, chain, or track-type conveyor mechanisms to achieve continuous product flow between various processing stations. In process scenarios such as full-circumference painting, full appearance inspection, multi-face assembly, and circumferential dimension inspection, it is generally necessary for products to rotate synchronously while being conveyed along a predetermined route to eliminate processing dead angles and meet all-round operation requirements. Therefore, conveyor devices that can achieve simultaneous conveying and rotation have become key supporting equipment for production lines.

[0003] Existing solutions for product conveying and rotation on production lines mainly fall into two categories: The first is a station-fixed rotating mechanism, where a servo turntable and lifting rotating module are separately installed at a designated station on the production line. After the product is conveyed to this station, it is lifted off the conveyor line and rotates independently, then falls back onto the conveyor to continue moving forward. This structure requires starting and stopping the conveyor and lifting the workpiece, resulting in interrupted processes and broken cycle times. It cannot achieve uninterrupted continuous rotation during movement, and frequent starts and stops can easily cause workpiece collisions and production line blockages. The equipment also has a large footprint and high modification costs. The second is a mobile, independently driven carrier, where each product-loading carrier is equipped with a separate micro-drive motor and reduction gear transmission components, relying on an onboard motor to independently drive the product's rotation. While this solution can achieve synchronous rotation throughout the conveying process, the large number of drive components across the entire line significantly increases equipment costs, wiring complexity, and the failure rate during later maintenance. The limited internal space of the carrier makes it difficult to arrange the motor structure, hindering lightweight and compact production line layouts.

[0004] Furthermore, the product does not need to maintain a constant rotation state in the conveyor line; rather, it needs to rotate at a specific station to meet the process requirements of that station. For example, in the spraying process, the product rotates after entering the spraying chamber on the conveyor line for spraying, and after passing through the spraying chamber, it only needs to be conveyed to the next station along a predetermined route.

[0005] As disclosed in the Chinese invention patent application document with prior art publication number CN118287296A, "A motor-assisted Ω-type assembly line hanger conveying and rotating device and its application", when the self-rotating mechanism runs along the Ω-type assembly line to the drive mechanism, the drive mechanism drives the self-rotating mechanism to cause the product to rotate at that point.

[0006] However, this technical solution only sets one specification for the drive mechanism. This means that when products on the assembly line enter the drive mechanism station, the products on each transmission mechanism rotate at the same speed. To change the rotation speed, this solution suggests changing the chain pitch, which is actually related to the gear pitch in the drive mechanism, or adjusting the motor speed to change the drive mechanism speed. However, regardless of the method used, there are limitations: the transmission mechanisms on the same drive mechanism always maintain the same rotation speed.

[0007] In reality, due to product specifications and processing requirements, the required rotation speed varies. Moreover, the production line should be universal, and it is often difficult to meet the requirement of conveying products of the same batch and uniform specifications on some production lines. Different specifications of products are often conveyed on the same conveyor line. Therefore, if the above technical solution is adopted, the rotation speed of products of different specifications will be the same when they are at the drive mechanism station at the same time, which makes it difficult to meet the construction process requirements of different products. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a conveying device that enables products to have different rotational speeds at the same workstation on the same conveyor line. The technical solution adopted by this invention is as follows: A conveying device includes a track and a set of carriers running along the track for loading products, and further includes at least two coaxially arranged drive turntables of different specifications; the track has an arc segment, and the arc segment is arranged around the drive turntable with the center of the drive turntable as the center; the carrier has a driven turntable that can only drive and cooperate with one of the drive turntables, the driven turntable is rotatably arranged in the carrier, and the product is coaxially arranged with the driven turntable and rotates synchronously.

[0009] In the above scheme, the vehicle carries the product and travels continuously along the track; the arc section of the track is arranged around the rotation center of each drive turntable of different specifications arranged coaxially. When the vehicle enters the arc section area, the driven turntable on the vehicle abuts against the drive turntable of the corresponding specification to form a transmission engagement.

[0010] Because the driven turntable can only be matched with a single type of drive turntable, and this equipment has at least two different types of drive turntables, different drive turntables produce different transmission ratios when they are coupled with their matching driven turntables. This results in different rotational speeds for the driven turntables coupled with different drive turntables. The driven turntables are coaxially mounted with the product, and during their rotation, they directly drive the coaxially arranged product to rotate synchronously. After the carrier exits the arc section, the driven turntable disengages from the drive turntable, and the product is transported in a straight line with the carrier and stops rotating.

[0011] Therefore, different specifications of driven turntables can be selected and installed on different carriers on the same conveyor line; after each driven turntable is matched with the driving turntable, a differentiated transmission ratio is formed. Even if multiple carriers pass through the arc position where the driving turntable is located simultaneously, the products carried by each carrier can still obtain different rotation speeds, realizing synchronous conveying and differentiated rotation processing of a single production line, and meeting the mixed production needs of different product specifications and different rotation process requirements.

[0012] Furthermore, the drive turntable is rotatably disposed in the conveying device, and a motor capable of driving the drive turntable to rotate around its central axis is also provided.

[0013] In this technical solution, when the motor is working, it can drive each drive turntable to rotate synchronously at the same angular velocity. Since the specifications of each drive turntable are different, under the premise of constant angular velocity, the outer edges of different drive turntables have different circumferential linear velocities.

[0014] When the carrier travels along the track to the arc-shaped work station, the driven turntable on the carrier is driven and engaged with the corresponding drive turntable. By adjusting the output speed of the motor, the rotational angular velocity of all drive turntables can be changed uniformly, and the linear velocity of the outer edge of each drive turntable can be changed synchronously. In turn, the rotational speed of all driven turntables and coaxial fixed products can be adjusted synchronously.

[0015] The structure allows for the selection of different specifications of driven turntables to match different vehicles: on the one hand, it relies on the ratio of driven and driven specifications to achieve initial graded speed change, and on the other hand, it relies on motor speed regulation to achieve continuous fine adjustment of the overall speed.

[0016] Optionally, the drive turntable includes a pair of axially spaced sprockets with a chain wound around them, and the driven turntable is a sprocket.

[0017] This solution adopts a chain and sprocket meshing transmission method, with a constant transmission ratio and no slippage, ensuring stable and reliable product rotation speed. The chain drive has a large load-bearing capacity and long wear life, making it suitable for conveying heavy-duty workpieces. At the same time, the chain linkage structure ensures that each set of drive turntables operates synchronously, allowing for stable operation even under harsh conditions such as dust and oil. Furthermore, the high fault tolerance of the sprocket and chain meshing during movement reduces the likelihood of jamming, effectively improving the stability and applicability of the device.

[0018] Optionally, the chain is a three-row roller chain.

[0019] The system employs a three-row roller chain with two sets of sprockets. The two rows of chains on either side mesh with the two sprockets respectively. Each set of sprockets forms an independent closed-loop meshing transmission through a row of chain links, ensuring synchronous rotation and uniform force distribution of the two drive sprockets, and avoiding uneven wear and sprocket skipping issues. The reserved space between the chain links in the middle of the three rows of chains provides sufficient radial space for the driven sprocket to extend between the two sprockets for meshing and assembly. The driven sprocket can be engaged in the middle meshing area of ​​the three rows of chains to complete the power connection.

[0020] Alternatively, the drive turntable may be a friction wheel or a gear.

[0021] In this scheme: when the drive turntable uses a friction wheel, the structure is easy to manufacture and the transmission ratio can be adjusted simply by changing the wheel diameter; when using a gear, the transmission relies on tooth meshing, and the transmission ratio can be accurately set by changing the number of gear teeth. Both structures are easy to choose flexibly according to actual working conditions.

[0022] Furthermore, the carrier includes a traveling trolley and a lifting device. The lifting device includes a fixed section and a suspended section for loading products. The fixed section is connected to the traveling trolley, and the suspended section is rotatably mounted on the fixed section. The driven turntable is mounted on the suspended section, and the suspended section can rotate synchronously with the driven turntable.

[0023] Furthermore, the fixed section includes a connecting rod and a sleeve section, the sleeve section being detachably mounted on the connecting rod, the connecting rod being connected to the traveling trolley, and the suspension section being rotatably mounted on the sleeve section.

[0024] The carrier consists of a traveling trolley and a lifting device. The lifting device comprises a fixed section and a suspended section. In the fixed section, a connecting rod is fixed to the traveling trolley, and a sleeve section is detachably mounted to the connecting rod. The suspended section is rotatably mounted on the sleeve section, and the driven turntable is installed on the suspended section. Due to the detachable assembly structure of the sleeve section, the suspension section with different specifications of driven turntables can be replaced according to production needs, allowing the driven turntables on the traveling trolley to be selectively matched with different specifications of drive turntables. Thanks to the detachable assembly of the sleeve section and connecting rod, different specifications of driven turntables can be quickly replaced without disassembling the main structure of the traveling trolley, making changeovers convenient. Different driven turntables can be matched with corresponding drive turntables, allowing products to achieve differentiated rotation speeds when the carrier travels through arc-shaped workstations. This facilitates mixed-line production of multiple categories of products with different rotation process requirements on the same production line, significantly improving equipment versatility and production line changeover efficiency.

[0025] Furthermore, a set of driven turntables that can respectively engage with each drive turntable are provided on the suspension section, and the axial position of each drive turntable on the suspension section is adjustable.

[0026] In this solution, driven turntables of different specifications are set on the suspension section. By adjusting the installation position of the driven turntables on the suspension section axially, one can be selected to cooperate with different specifications of drive turntables to form a differentiated transmission ratio, thereby flexibly changing the product's rotation speed. No parts need to be disassembled or replaced, making debugging and model change convenient and efficient.

[0027] In summary, this invention utilizes a coaxial arrangement of various specifications of drive turntables, combined with a structural design that allows for the selection of driven turntable specifications or adjustable axial positions on the carrier. This enables products on the same conveyor line to achieve different transmission ratios and differentiated rotation speeds when passing through the same workstation. This allows for the simultaneous completion of product conveying and processing with multiple rotational process requirements at the same workstation on a single conveyor line, effectively improving the flexible production capacity of the production line. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the conveying device; Figure 2 for Figure 1 Bottom view; Figure 3 A schematic diagram of a drive turntable structure using a combination of sprockets and chains; Figure 4 This is a schematic diagram of the track layout at the drive turntable position. In the diagram, a is a U-shaped layout and b is a 1 / 4 arc-shaped layout. Figure 5 This is a schematic diagram of the vehicle structure; Figure 6 Schematic diagram of a structure where the driven turntable can be adjusted in the axial position of the lifting device; Figure 7 This is a partial cross-sectional view of Example 2.

[0029] Explanation of reference numerals in the attached figures: 100—track; 200—Vehicle; 201—Driven turntable; 202—Hook; 210—Lifting gear; 211—Fixed section; 211-1—Connecting rod; 211-2—Casing section; 211-3—Pin ball buckle; 212—Suspension section; 220—Traveling trolley; 221—Walking wheel; 222—Limit guide wheel; 300—Drive turntable; 301—Sprocket; 302—Chain; 303—Positioning sleeve; 400—Motor; 401—Drive sprocket; 500—Central column; 600—Bearing; 700—Dust cover; 800—Oil collection hood; 900—Crossbeam; 901—Suspension. Detailed Implementation

[0030] To clearly understand the inventive concept of this invention, the technical solution of this invention will be further described in detail below from the perspective of the overall concept and specific embodiments.

[0031] like Figure 1 The conveying device shown is used for conveying products on an assembly line. In terms of overall function, it mainly consists of three parts: track 100, carrier 200, and drive turntable 300.

[0032] The track 100 serves as the support mechanism for the carrier 200 in the entire conveying device, guiding the carrier 200 to travel along a fixed route on it.

[0033] The carrier 200 serves as the product-carrying mechanism, used to load the product and transport it along the predetermined route laid by the track 100.

[0034] The drive turntable 300 is used to drive the product loaded on the carrier 200 to rotate. The process is that when the carrier 200 carries the product along the track 100 to the position of the drive turntable 300, the driven turntable 201 on the carrier 200, which is linked to the product, comes into contact with the drive turntable 300. The drive turntable 300 drives the driven turntable 201 to rotate, causing the product to rotate. Thus, the conveying device enables the product to be conveyed along the predetermined path with the carrier 200 when it passes the position of the drive turntable 300, and at the same time, it rotates.

[0035] The product's rotation at the drive turntable 300 position is to meet the workstation's operational requirements. In actual production, different products require different rotation speeds depending on the process requirements. Unlike the background technology, which mentions changing the product's rotation speed by altering the motor speed, and where all products on the conveyor line can only maintain the same rotation speed, this conveyor device uses at least two drive turntables 300 of different specifications, which, in conjunction with selectively configured driven turntables 201 in the carrier 200, achieve different transmission ratios, thereby changing the product's rotation speed. This ensures that different products on the same conveyor line can have different rotation speeds at the workstations of the drive turntables 300, thus meeting the operational process requirements.

[0036] The structure of the conveying device will now be described in detail with reference to the specific embodiments shown in the accompanying drawings.

[0037] Example 1 like Figure 1 As shown, the conveying device includes a pair of drive turntables 300 of different specifications, coaxially arranged and axially spaced (this embodiment only uses two drive turntables as an example; drive turntables of other specifications can be added based on this embodiment according to actual needs), such as Figure 3 The pair of drive turntables 300 shown are each composed of a pair of axially spaced sprocket discs 301 and a chain 302 that is wound around the sprocket discs 301 and meshes with them. The chain 302 is a three-row roller chain, so that the outer rollers of the chain 302 mesh with the two sprocket discs 301 respectively, and the rollers in the middle of the chain 302 are used to mesh with the driven turntable 201.

[0038] The specifications of these two drive turntables 300 are different. In this embodiment, the specification refers to the pitch circle size of the sprocket disc 301, that is, the pitch circle sizes of the sprocket discs 301 constituting the two drive turntables 300 are different. Figure 1 As can be seen from the embodiment shown, the pitch circle of the sprocket 301 in the upper drive turntable 300 is larger than that of the sprocket 301 in the lower drive turntable 300.

[0039] like Figure 1 The track 100 in the conveying device shown is not laid out in a straight line, but rather forms an arc around the outer periphery of the drive turntable 300 at the position of the drive turntable 300. Figure 2 As shown in the bottom view, the track 100 is generally Ω-shaped. This is designed so that when the vehicle 200 running on the track 100 enters the drive turntable 300, it can travel a sufficiently long path at the drive turntable 300, allowing the driven turntable 201 on the vehicle 200 to rotate fully, meeting the requirement that the product has at least one rotation cycle. Of course, the track 100's orientation here is only shown in the scenario of this embodiment 1; in practice, the arrangement of the track 100 is not limited to the Ω shape in this embodiment. For example, other arrangements could also be used... Figure 4 The U-shaped layout shown in Figure a, or Figure 4 The 1 / 4 arc layout of section b should be set according to the actual site layout, but at least the track 100 should have an arc shape at the position of the drive turntable 300 to ensure that the driven turntable 201 has a sufficient path to contact the drive turntable 300 so that the driven turntable 201 can rotate fully. At the same time, the arc section of the track 100 at the position of the drive turntable 300 should be concentric with the drive turntable 300 so that when the carrier 200 is running at this position, the center distance between the driven turntable 201 and the drive turntable 300 should remain consistent and they should always be in contact, so that the product can be continuously in a state of rotation at this position.

[0040] To ensure the product is conveyed along the path laid out on track 100, and simultaneously rotates at position 300 of the drive turntable, such as... Figure 1 As shown, a vehicle 200 is installed on track 100 and travels along a predetermined path on track 100, such as... Figure 5 The carrier shown includes a traveling trolley 220 arranged in a track 100. In this embodiment, when the track 100 uses a C-shaped rail, the traveling trolley 220 includes wheels 221 supporting the trolley 220. A lifting device 210 is installed on the traveling trolley 220 to suspend products. The lifting device 210 includes a fixed section 211 connected to the traveling trolley 220 and a suspension section 212 for suspending products. The suspension section 212 is rotatably mounted on the fixed section 211. A driven turntable 201 and a hook 202 are installed on the suspension section 212. The hook 202 is used to suspend products, while the driven turntable 201 contacts a driving turntable 300, causing it to rotate passively during operation. This allows the products suspended on the hook 202 to rotate along with the driven turntable 201. The use of the hook 202 to load products is only a product-bearing method in this embodiment; other methods, such as clamps, may be used to load products into the lifting device 210. In this embodiment, to ensure that the center distance between the driven turntable 201 and the driving turntable 300 is always consistent, a limiting guide wheel 222 is also provided on the traveling trolley 220. The limiting guide wheel 222 contacts the inner wall of the C-shaped rail to limit the position of the lifting device 210 installed in the middle of the traveling trolley 220, so that the lifting device 210 is always at the center line of the track 100.

[0041] Furthermore, the structure of the aforementioned track 100 is not limited to C-shaped rails; other track structures such as I-beam rails can also be used. The structure of the corresponding traveling trolley 220 is also adjusted accordingly to enable it to travel on tracks of the corresponding structure.

[0042] As a product conveyor line, the products should normally be arranged in an orderly manner and travel along a predetermined route. Therefore, a set of carriers 200 are arranged on the track 100. The carriers 200 can be self-powered traveling trolleys 220 that move along the track 100 on their own, or they can be connected together by hinges or ropes and driven to move synchronously along the track 100 by a traction mechanism. Alternatively, a transmission chain can be arranged in the track 100 to fix the traveling trolleys 220 on the transmission chain, which will then drive them to move.

[0043] If the product specifications and rotation speed requirements are the same on each carrier, then each carrier 200 arranged on track 100 can use the same specification of driven turntable 201 to drive the corresponding drive turntable 300. However, in actual production, it is difficult for the products on the conveyor line to be consistent. Different products need to rotate at different speeds at the workstations of the drive turntable 300 to meet the workstation's process requirements. Therefore, different specifications of driven turntables 201 can be configured on each traveling trolley 220, allowing different specifications of driven turntables 201 to achieve different transmission ratios with their corresponding drive turntables 300, thus achieving different rotation speeds. When products are loaded onto carriers, a carrier with an appropriate transmission ratio can be selected according to actual needs. For example, carriers 200 configured with different specifications of driven turntables 201 can be set at intervals, and products can be suspended on carriers 200 with corresponding rotation speeds, thus ensuring the continuity of product conveying on the conveyor line. Alternatively, further... Figure 5 The carrier 200 shown has a lifting device 210 and a traveling trolley 220 assembled in a detachable manner. According to the actual production plan, the lifting device 210 with different specifications of driven turntable 201 is installed on each traveling trolley 220 to make the interval between different products on the conveyor line smaller and improve the conveying efficiency.

[0044] The structure of this carrier 200, which allows for the replacement of driven turntables 201 of different specifications, is further illustrated here using a specific example. Figure 5 As shown, the fixed section 211 of the spreader 210 includes a connecting rod 211-1 fixed to the traveling trolley 220, and a sleeve section 211-2 that can be fitted onto the connecting rod 211-1. The connecting rod 211-1 and the sleeve section 211-2 can be quickly connected via a ball joint buckle 211-3. The suspension section 212 is rotatably mounted on the sleeve section 211-2, and the driven turntable 201 is fixed on the suspension section 212. With this structure, only the sleeve section 211-2 with different specifications of driven turntable 201 needs to be selected and connected to the connecting rod 211-1, and the carrier 200 can achieve the required transmission ratio. Therefore, according to the actual production plan, the suspension section 212 with the corresponding rotation speed can be assembled in advance in each carrier 200 to improve efficiency, meet process requirements, and make the conveying device more versatile. This structure is only one embodiment; it is foreseeable that structures that change the rotation speed of the product on the carrier 200 by replacing the matching of different specifications of driven turntables 201 with corresponding drive turntables 300 should be considered the same. For example... Figure 6As shown, a set of driven turntables 201 of different specifications with adjustable axial position are configured on the lifting device 210. It is only necessary to adjust the position of the driven turntables 201 in the axial direction of the lifting device 210 so that only one driven turntable 201 can be driven and engaged with the corresponding driving turntable 300, while the other driven turntables 201 are adjusted to a position that is offset from the driving turntable 300, thereby changing the rotation speed of the product on the carrier 200.

[0045] In the above embodiments, the drive turntable 300 is fixedly arranged in the conveyor line. That is, the drive turntable 300 itself does not rotate; it only rotates when the driven turntable 201 contacts the drive turntable 300 during the operation of the carrier 200. Its rotation speed depends not only on the transmission ratio between the drive turntable 300 and the driven turntable 201, but also on the carrier's running speed. A faster carrier 200 travels on the track 100 results in a faster rotation speed. During normal production operations, the carrier 200 should maintain a consistent speed on the conveyor line at a reasonable conveying speed to ensure that each workstation has sufficient time to complete its corresponding process.

[0046] Therefore, when the specifications of the driving turntable 300 and the driven turntable 201 are fixed and the transmission ratio remains unchanged, in order to make the rotation speed of the product at the position of the driving turntable 300 controllable, and without changing the speed of the carrier 200 to control the rotation speed of the product, the technical solution in Embodiment 2 can be adopted to achieve the above objective. The structure of Embodiment 2 will be further described in detail below.

[0047] Example 2 like Figure 7 As shown, in the above embodiment, without changing the overall layout of the track 100, carrier 200, and drive turntable 300, the drive turntable 300 is rotatably mounted in the conveying device. The specific structure is as follows: Figure 7As shown, a drive turntable 300 is rotatably mounted on a central column 500, and a motor 400 is configured to drive the drive turntable 300 to rotate. In this embodiment, when the drive turntable 300 consists of a chain 302 and a sprocket 301, the output end of the motor 400 is equipped with a drive sprocket 401, which meshes with the roller in the middle of the chain 302 to drive the drive turntable 300 to rotate. The two drive turntables 300 are connected together by a positioning sleeve 303. When the motor 400 drives one drive turntable 300 to rotate, the other drive turntable 300 rotates synchronously. In this structure, if the product's rotation speed needs to be further changed, this can be achieved by changing the speed and direction of rotation of the motor 400. This serves as an auxiliary means to adjust the product's rotation speed, allowing the product to reach a suitable rotation speed. With a fixed transmission ratio between the drive turntable 300 and the driven turntable 201, this auxiliary means can be used to further adjust and optimize the product's rotation speed to meet the workstation's operational requirements. Under this structure that alters the product's rotation speed, it is foreseeable that when the arc segment of track 100 is located at the position of drive turntable 300 is relatively short (e.g., ... Figure 4 (As shown in b) When only 1 / 4 of the circumference is present, in order to meet the requirement that the product can rotate once at the station where the drive turntable 300 is located, the product's rotation speed can be adjusted by increasing the motor speed by 400 as described above to meet the operation requirements.

[0048] The installation details of the main structures in the two embodiments described above will be further explained below to make it easier for those skilled in the art to implement the above technical solutions. Figure 1 In Embodiment 1, the two drive turntables 300 can be fixed to the center column 500 via flanges, or only one drive turntable 300 can be fixed, with the other drive turntable 300 connected to the drive turntable 300 fixed to the center column 500 via a positioning sleeve 303. This positioning sleeve 303 further stabilizes the axial distance between the two drive turntables 300, facilitating the determination of the height position of the driven turntable 201 and preventing interference between driven turntables 201 at different heights on different carriers due to a small axial distance between the two drive turntables 300. Similarly, when the drive turntable 300 is composed of two sprocket discs 301 and three rows of roller chains, a positioning sleeve 303 can also be provided between the two sprocket discs 301 to connect them, limiting the distance between them and ensuring stable installation of the chain 302.

[0049] In Example 2, since the drive turntable 300 needs to rotate autonomously, a method such as... Figure 7As shown, one drive turntable 300 is mounted on the center column 500 via a bearing 600, allowing it to rotate on the center column 500. The other drive turntable 300 can be connected to the drive turntable 300 fixed on the bearing 600 via a positioning sleeve 303 to achieve synchronous rotation. The motor 400 can be mounted and fixed via the suspension 901 shown in the figure, and drives the drive turntable 300 to rotate by driving the outer ring of one of the drive turntables 300, or the motor 400 can be placed at the center of the drive turntable 300 and connected to the drive turntable 300 via a flange to directly drive its rotation. To protect the bearing 600, a dust cover 700 and an oil collection cover 800 can be installed on the center column 500, respectively covering both ends of the bearing 600 to prevent dust. An oil filling port can be provided on the dust cover 700 to facilitate the injection of grease into the bearing at any time, ensuring the maintenance of the bearing 600. The oil collection cover 800 can collect the grease that leaks from the bearing 600 during operation, so as to protect the cleanliness of the equipment and avoid contamination.

[0050] In the two embodiments described above, the central column 500 can adopt a suspended structure as shown in the figure, that is, the central column 500 is suspended and fixed by the crossbeam 900. Alternatively, a column can be installed on the ground as the central column 500. Both methods can satisfy the installation of the drive turntable 300. Compared with ground installation, the suspended column has ample space below it, which can further provide sufficient space for the product to rotate when the suspended carrier 200 as described in the above embodiments is used to transport the product. Conversely, if the track is laid on the ground and the drive turntable is set up by installing the column on the ground, sufficient space can be reserved above the drive turntable 300 for the product to rotate. In this case, the carrier 200 can use a pallet or other form to carry the product.

[0051] The above embodiments only show the structure of the drive turntable 300 composed of a sprocket and a chain. In practice, the structure of the drive turntable can also be a friction wheel or a gear, and the corresponding driven turntable should also be replaced with a corresponding friction wheel or gear. Although friction wheels are easier to design and manufacture, and their transmission ratio is determined by their outer diameter, friction transmission is prone to slippage after the friction wheel wears, making it unstable when driving the driven turntable. While gears have stable transmission performance, their design and manufacturing are complex, and the tolerance for perfect meshing during gear movement is low, making them prone to tooth breakage and jamming. Therefore, the drive turntable with a sprocket and chain structure in the embodiments is a better solution. Its driven turntable has a high tolerance for meshing with the chain during movement, and the transmission is stable and will not slip.

Claims

1. A conveying device comprising a track (100) and a set of carriers (200) running along the track (100) for loading products, characterized in that: It also includes at least two coaxial drive turntables (300) with different specifications. The track (100) is provided with an arc segment, and the arc segment is arranged around the center of the drive turntable (300); The carrier (200) is provided with a driven turntable (201) that can only be driven to cooperate with one of the drive turntables (300). The driven turntable (201) is rotatably arranged in the carrier (200), and the product is arranged coaxially with the driven turntable (201) and rotates synchronously.

2. The conveying device according to claim 1, characterized in that: The drive turntable (300) is rotatably disposed in the conveying device, and a motor (400) is also provided that can drive the drive turntable (300) to rotate around its central axis.

3. A conveying device according to claim 1 or 2, characterized in that: The drive turntable (300) includes a pair of axially spaced sprocket discs (301), on which a chain (302) is wound. The driven turntable (201) is a sprocket.

4. A conveying device according to claim 3, characterized in that: The chain (302) is a three-row roller chain.

5. A conveying device according to claim 1 or 2, characterized in that: The drive turntable (300) is a friction wheel or a gear.

6. A conveying device according to claim 1, characterized in that: The carrier (200) includes a traveling trolley (220) and a lifting device (210). The lifting device (210) includes a fixed section (211) and a suspension section (212) for loading products. The fixed section (211) is connected to the traveling trolley (220). The suspension section (212) is rotatably mounted on the fixed section (211). The driven turntable (201) is mounted on the suspension section (212). The suspension section (212) can rotate synchronously with the driven turntable (201).

7. A conveying device according to claim 6, characterized in that: The fixed section (211) includes a connecting rod (211-1) and a sleeve section (211-2). The sleeve section (211-2) is detachably mounted on the connecting rod (211-1). The connecting rod (211-1) is connected to the traveling trolley (220). The suspension section (212) is rotatably mounted on the sleeve section (211-2).

8. The conveying device according to claim 6, characterized in that: A set of driven turntables (201) are provided on the suspension section (212) respectively, which can be driven and cooperate with each drive turntable (300), and the axial position of each drive turntable (300) on the suspension section (212) is adjustable.

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