Tensioning mechanism and conveying device
By adopting a design in which the driven shaft is fixedly connected to the sliding seat in the tensioning mechanism, and combining limiting components, elastic components and counterweight components, the problem of easy bearing damage in the prior art is solved, and uniform tensioning and stable transmission of the chain are achieved.
Patent Information
- Application Number
- CN202423165234.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-21
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-21
AI Technical Summary
The bearings in the existing tensioning mechanism are prone to damage, resulting in uneven chain tension, which in turn leads to problems such as shaft tilting and bearing jamming.
The design adopts a fixed connection between the driven shaft and the sliding seat. The gear is mounted on the driven shaft through bearings. When the chain meshes with the gear, external force is applied only in the radial direction to avoid damage to the bearings. The tension is increased by limiting components, elastic components and counterweight components to ensure that the driven shaft maintains a horizontal posture.
It extends the service life of the bearings, prevents bearing jamming, and achieves uniform chain tension and stable transmission.
Smart Images
Figure CN223619483U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of photovoltaic module manufacturing, and more particularly to a tensioning mechanism and a conveying device. Background Technology
[0002] In the production process of photovoltaic cells, the cells may undergo at least one high-temperature treatment step, such as curing, drying, and sintering. The industry commonly uses heat treatment furnaces with chain mechanisms.
[0003] The chain mechanism consists of two parallel chains, with multiple chain rod supports for supporting the solar cells installed between them. To ensure proper chain tension, the heat treatment furnace is also equipped with a tensioning mechanism. This mechanism includes two guide rods fixed to the frame, two sliding blocks, a rotating shaft, and two gears fixed to the shaft. The two ends of the shaft are mounted on the sliding blocks on either side via bearings. The two sliding blocks are slidably mounted on the two guide rods. Each chain partially meshes with one of the two gears to achieve chain tension. When the tension of the chains on both sides is uneven, the gears experience uneven force, causing the rotating shaft to tilt, which in turn damages the bearings at both ends of the shaft, ultimately leading to bearing seizure. Utility Model Content
[0004] The purpose of this application is to provide a tensioning mechanism to solve the problem of damaged bearings in existing tensioning mechanisms.
[0005] To achieve this objective, the following technical solution is adopted in this application:
[0006] A tensioning mechanism is provided for tensioning two parallel chains within a heat treatment furnace. The tensioning mechanism includes two guide rods, two sliding seats, a driven shaft, two gears, and two bearings, wherein:
[0007] Two guide rods are fixedly mounted on the frame of the heat treatment furnace at a relative interval, two sliding seats are slidably mounted on the two guide rods respectively, and the two ends of the driven shaft are fixedly mounted on the two sliding seats respectively;
[0008] The driven shaft extends perpendicularly to the guide rod. The inner rings of the two bearings are spaced apart and fitted on the outer surfaces of both ends of the driven shaft. Two gears are fixedly mounted on the outer rings of the two bearings respectively. The distance between the two gears is the same as the distance between the two parallel chains and they are used to mesh with the two chains respectively.
[0009] With the above configuration, when the chain contacts the gear, the gear rotates directly around the driven shaft without requiring the driven shaft to rotate as well. When the chain tension is uneven, the chain will only apply external force radially along the driven shaft, making the bearings connecting the gear and the driven shaft less prone to damage. At the same time, the driven shaft is fixedly mounted on two sliding seats at both ends, which improves the structural strength. The driven shaft can maintain a horizontal posture during tensioning, thereby providing uniform tension and avoiding the bearing damage and jamming situation in the prior art.
[0010] Optionally, each guide rod is provided with a limiting member on at least one side of the sliding seat, and an elastic member is sleeved on each guide rod between at least one limiting member and the sliding seat.
[0011] By setting limiting and elastic components, the tension force can be further increased, thus improving the tensioning effect.
[0012] Optionally, the elastic element is at least one of a tension spring, a compression spring, or a spring sheet.
[0013] Three feasible implementation methods for the flexible components are provided, which are low-cost, readily available, and easy to maintain.
[0014] Optionally, the tensioning mechanism may also include a counterweight assembly disposed between the two bearings.
[0015] By adding a counterweight component, the tension force is further increased, which can improve the tensioning effect.
[0016] Optionally, the counterweight assembly is a counterweight protrusion, which is located in the middle of the driven shaft, and the counterweight protrusion and the driven shaft are integrally formed; or,
[0017] The counterweight assembly includes a connector and a counterweight block, with the counterweight block being fixedly connected to the center of the driven shaft via the connector.
[0018] By setting a counterweight protrusion in the middle of the driven shaft, the tension force can be further increased, thus improving the tensioning effect.
[0019] Optionally, the tensioning mechanism also includes two fixing blocks and two screws. The first side of each fixing block is provided with a blind hole or through hole for receiving the end of the driven shaft, and the second side of each fixing block is fixedly connected to the sliding seat.
[0020] The driven shaft has threaded holes at both ends. The screws lock the fixing block to the driven shaft end through the through holes or blind holes at the driven shaft end.
[0021] By setting a fixing block, the end of the driven shaft can be easily locked or disassembled, making maintenance convenient.
[0022] Optionally, the tensioning mechanism is further provided with two limiting rings. The two limiting rings are sleeved on the driven shaft and abut against the inner rings of the two bearings respectively. The two limiting rings are used to limit the movement of the bearings in the extension direction of the driven shaft.
[0023] By setting a limiting ring to restrict the bearing, the bearing is prevented from sliding along the driven shaft.
[0024] Optionally, the tensioning mechanism further includes at least two clamping gears, which are rotatably mounted on the frame. The at least two clamping gears and the gear are located on opposite sides of the same chain. The clamping gears are used to extend the length of the chain meshing with the gear and / or to prevent the chain from disengaging from the gear.
[0025] By setting a clamping gear, the chain is prevented from disengaging from the gear, thus disengaging the chain; and / or, the range of chain-gear engagement is increased.
[0026] Optionally, a conveying device is provided, comprising a chain mechanism and a tensioning mechanism, wherein:
[0027] The chain mechanism includes a drive unit and two parallel chains. The drive unit is used to drive the two chains to move, and the tensioning mechanism is used to tension the two chains.
[0028] The drive unit drives the chain, which is then tensioned by the tensioning mechanism, ensuring smooth transmission and maintaining uniform tension throughout the chain.
[0029] Optionally, the chain mechanism also includes a carrier and multiple conveying supports disposed between the two chains. The two chains are wound around the carrier, and a drive unit is used to drive the two chains to move along the carrier so as to drive the conveying supports to convey the battery cells.
[0030] By setting up a carrier and a conveyor bracket, the chain can move in a straight line along the carrier, and the conveyor bracket connected to the chain can smoothly transport the battery cells.
[0031] In the tensioning mechanism proposed in this application, the driven shaft is fixedly connected to the sliding seats on both sides, making the structure more stable. When the chain vibrates, the driven shaft is less likely to be tilted by force. The gear is mounted on the driven shaft through bearings, which can also partially mesh with the chain to achieve tension. Furthermore, even if the chain vibrates, the chain will only move closer to or slightly away from the gear, without exerting lateral force on the bearing, thus extending the service life of the bearing. Attached Figure Description
[0032] Figure 1 This is a first-view structural schematic diagram of the tensioning mechanism in this application;
[0033] Figure 2 This is a second-view structural schematic diagram of the tensioning mechanism, which conceals part of the structure in this application;
[0034] Figure 3 This is a cross-sectional view of the hidden guide rod of the tensioning mechanism in this application;
[0035] Figure 4 This is a first-view structural diagram of the tensioning mechanism and chain in this application.
[0036] Figures 1 to 4 The following reference numerals are included:
[0037] 1. Guide rod; 2. Sliding seat; 3. Driven shaft; 4. Gear; 41. Limiting ring; 5. Bearing; 6. Limiting component; 7. Elastic component; 8. Counterweight assembly; 9. Fixing block; 91. Screw; 10. Pressure gear; 11. Chain. Detailed Implementation
[0038] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0039] In the production process of photovoltaic cells, the cells may undergo at least one high-temperature treatment step, such as curing, drying, and sintering. The industry commonly uses heat treatment furnaces with chain mechanisms to perform the corresponding high-temperature treatment processes on the cells.
[0040] The chain mechanism consists of two parallel chains, with multiple chain rod supports for the solar cells installed between them. The chains are driven to move these supports, thus conveying the solar cells. To ensure proper chain tension, the heat treatment furnace is also equipped with a tensioning mechanism. This mechanism includes two guide rods fixed to the furnace frame, two sliding blocks, a rotating shaft, and two gears fixed to the shaft. The two ends of the shaft are mounted on the sliding blocks via bearings. The two sliding blocks are slidably mounted on the two guide rods. The two chains mesh with the edges of the two gears to achieve chain tension. When the tension of the chains on both sides is uneven, the gears experience uneven force, causing the shaft to tilt and potentially damaging the bearings at both ends, ultimately leading to bearing seizure.
[0041] In view of this, such as Figure 1 As shown, this application provides a tensioning mechanism for tensioning two parallel chains 10 inside a heat treatment furnace. The tensioning mechanism includes two guide rods 1, two sliding seats 2, a driven shaft 3, two gears 4, and two bearings 5, wherein:
[0042] Two guide rods 1 are fixedly mounted on the frame of the heat treatment furnace at a relative interval, and two sliding seats 2 are slidably mounted on the two guide rods 1 respectively. The two ends of the driven shaft 3 are fixedly mounted on the two sliding seats 2 respectively.
[0043] The driven shaft 3 extends perpendicularly to the guide rod 1. The inner rings of the two bearings 5 are spaced and fitted onto the outer surfaces of both ends of the driven shaft 3. The two gears 4 are fixedly mounted on the outer rings of the two bearings 5 respectively. The distance between the two gears 4 is the same as the distance between the two parallel chains 10 and they are used to mesh with the two chains 10 respectively.
[0044] With the above configuration, the driven shaft 3 is fixedly mounted on two sliding seats 2 at both ends, improving structural strength and ensuring that the driven shaft 3 maintains a horizontal posture during tensioning. When the tension of the two chains 10 is uneven or when uneven external force is applied to the driven shaft 3 by the chains 10 for other reasons, the driven shaft 3 will not tilt; that is, the chains 10 will only apply external force to the gear 4 radially (which is also the radial direction of the bearing 5). The bearing 5 connecting the gear 4 and the driven shaft 3 can withstand the radial external force from the chain 10 and is not easily damaged, avoiding the situation of bearing 5 jamming due to damage in the prior art. At the same time, since the driven shaft 3 remains horizontal, the tensioning mechanism can provide uniform tension to the chain 10.
[0045] The sliding seat 2 can be a linear bearing 5, or it can be machined with a through hole with a smooth inner wall, the inner diameter of which is adapted to the outer diameter of the guide rod 1.
[0046] To further increase the tension, such as Figure 2 As shown, at least one side of each guide rod 1 is provided with a limiting member 6, and an elastic member 7 is also provided between at least one limiting member 6 on each guide rod 1 and the sliding seat 22. The elastic member 7 increases the tension force applied to the chain 10 by the tensioning mechanism. Optionally, the elastic member 7 can be at least one of a tension spring, a compression spring, or a spring sheet. For example, Figure 2 The upper elastic element 7 of the guide rod 1 is a compression spring, and the lower elastic element 7 of the guide rod 1 is a tension spring. This spring can apply a force to the sliding seat 2 as it slides down the guide rod 1. This force is transmitted to the chain 10 by the driven shaft 3, thus tensioning the chain 10. The tension spring, compression spring, and spring sheet can be used in any combination. This method is low-cost, readily available, and easy to maintain.
[0047] To further increase the tension, the tensioning mechanism may include a counterweight assembly 8, which is disposed between the two bearings 5. Figure 1 As shown, a counterweight assembly 8 is provided on the driven shaft 3 and located between the two bearings 5. The counterweight assembly 8 applies an external force to the driven shaft 3 by its own weight. This external force is transmitted to the chain 10 through the driven shaft 3, so that the chain 10 is further tensioned.
[0048] Specifically, continue to refer to Figure 1 and Figure 3The counterweight assembly 8 can be configured as a counterweight protrusion, which is located in the middle of the driven shaft 3. The counterweight protrusion can be integrally formed with the driven shaft 3. Alternatively, the counterweight assembly 8 can include a connector and a counterweight block. The counterweight block is hung in the middle of the driven shaft 3 through the connector. By replacing or adding counterweight blocks of different weights, the total weight of the counterweight assembly 8 can be adjusted, thereby adjusting the tension applied to the chain 10.
[0049] To facilitate the installation of driven shaft 3, such as Figure 3 As shown, the tensioning mechanism also includes two fixing blocks 9 and two screws 91. One side of the fixing block 9 can be provided with a through hole or a blind hole to accommodate the end of the driven shaft 3. Further optionally, the end of the driven shaft 3 is provided with a screw 91 hole, and the fixing block 9 has a blind hole with a through hole at the bottom. The screw 91 passes through the through hole and is screwed into the screw 91 hole of the driven shaft 3, thus fixing the driven shaft 3 to the fixing block 9. Then, the fixing block 9 is fixedly connected to the sliding seat 2, thereby achieving a stable connection between the driven shaft 3 and the fixing block 9. The above configuration is simple in structure, easy to disassemble, and convenient for maintenance.
[0050] Continue to refer to Figure 3 Gear 4 is rotatably mounted on driven shaft 3 via bearing 5. To prevent bearing 5 from sliding along driven shaft 3, tensioning mechanism includes two limiting rings 41. The two limiting rings 41 are sleeved on driven shaft 3 and abut against the inner rings of the two bearings 5 respectively, thus limiting bearing 5. Figure 3 In this design, a limiting ring 41 is provided for each bearing 5. Alternatively, two limiting rings 41 can be provided for a bearing 5, with the two limiting rings 41 located on both sides of the bearing 5.
[0051] To prevent chain 10 from disengaging from gear 4 in certain extreme situations, and / or to prevent insufficient contact length between chain 10 and gear 4, such as... Figure 4 The tensioning mechanism includes at least two clamping gears 104. The first clamping gear 104 is rotatably mounted on the frame of the heat treatment furnace, located on both sides of the same chain 10 as the gear 4. One clamping gear 104 meshes with the gear 4 on both sides of the same chain 10, and the same applies to the other side. By providing clamping gears 104, the chain 10 can be prevented from disengaging from the gear 4 and / or the contact length between the chain 10 and the gear 4 can be increased, further ensuring the stability of the tensioning effect. Furthermore, more clamping gears 104 can be provided to further improve the anti-disengagement effect and increase the contact length.
[0052] This application also provides a conveying device, which includes a chain 10 mechanism and a tensioning mechanism as mentioned above. The chain 10 mechanism includes a drive member and two parallel chains 10. The drive member is used to drive the two chains 10 to move and may include a power source such as a servo motor and a common transmission structure such as a synchronous pulley. The tensioning mechanism is used to tension the two chains 10. With the above configuration, it can be ensured that the chains 10 are continuously tensioned, smoothly conveying the battery cells and preventing the chains 10 from sagging.
[0053] Furthermore, the chain 10 mechanism also includes a carrier and multiple conveying supports disposed between the two chains 10. The two chains 10 are wound around the carrier, which can be a wear-resistant metal track with guide grooves. A drive unit is used to drive the two chains 10 to move along the carrier, thereby driving the conveying supports to convey the battery cells. The drive unit drives the chains 10 to move along the direction of the groove extension, and the chains 10 are guided to ensure that they move in a straight line, thus ensuring that the conveying path is straight and will not deviate.
[0054] The above embodiments merely illustrate the basic principles and characteristics of this application. This application is not limited to the above examples. Various changes and modifications can be made to this application without departing from its spirit and scope. For example, at least two of the above embodiments can be combined arbitrarily without conflict, and these combinations also fall within the scope of this application as claimed. The scope of protection of this application is defined by the appended claims and their equivalents.
Claims
1. A tensioning mechanism, characterized in that, The tensioning mechanism is used to tension two parallel chains inside the heat treatment furnace. The tensioning mechanism includes two guide rods, two sliding seats, a driven shaft, two gears, and two bearings, wherein: Two guide rods are fixedly mounted on the frame of the heat treatment furnace at a relative interval, and two sliding seats are slidably mounted on the two guide rods respectively. The two ends of the driven shaft are fixedly mounted on the two sliding seats respectively. The driven shaft extends perpendicularly to the guide rod. The inner rings of the two bearings are spaced apart and fitted onto the outer surfaces of both ends of the driven shaft. The two gears are fixedly mounted on the outer rings of the two bearings. The distance between the two gears is the same as the distance between the two parallel chains and they are used to mesh with the two chains respectively.
2. The tensioning mechanism according to claim 1, characterized in that, Each guide rod has a limiting member on at least one side of the sliding seat, and each guide rod has an elastic member sleeved between at least one limiting member and the sliding seat.
3. The tensioning mechanism according to claim 2, characterized in that, The elastic element is at least one of a tension spring, a compression spring, or a spring sheet.
4. The tensioning mechanism according to claim 1, characterized in that, The tensioning mechanism also includes a counterweight assembly disposed between the two bearings.
5. The tensioning mechanism according to claim 4, characterized in that, The counterweight assembly is a counterweight protrusion, which is disposed in the middle of the driven shaft, and the counterweight protrusion and the driven shaft are integrally formed; or, The counterweight assembly includes a connector and a counterweight block, and the counterweight block is fixedly connected to the middle part of the driven shaft through the connector.
6. The tensioning mechanism according to claim 1, characterized in that, The tensioning mechanism also includes two fixing blocks and two screws. The first side of each fixing block is provided with a blind hole or through hole for accommodating the end of the driven shaft, and the second side of each fixing block is fixedly connected to the sliding seat. The driven shaft has threaded holes at both ends, and the screw locks the fixing block to the driven shaft end through the through hole or blind hole at the driven shaft end.
7. The tensioning mechanism according to claim 1, characterized in that, The tensioning mechanism is also provided with two limiting rings. The two limiting rings are sleeved on the driven shaft and abut against the inner rings of the two bearings respectively. The two limiting rings are used to limit the movement of the bearings in the extension direction of the driven shaft.
8. The tensioning mechanism according to claim 1, characterized in that, The tensioning mechanism further includes at least one clamping gear, which is rotatably mounted on the frame, with one clamping gear and one gear located on opposite sides of the same chain.
9. A conveying device, characterized in that, The conveying device includes a chain mechanism and a tensioning mechanism as described in any one of claims 1-8, wherein: The chain mechanism includes a drive component and two parallel chains. The drive component is used to drive the two chains to move, and the tensioning mechanism is used to tension the two chains.
10. The conveying device according to claim 9, characterized in that, The chain mechanism further includes a carrier and a plurality of conveying brackets disposed between the two chains. The two chains are wound around the carrier, and the driving member is used to drive the two chains to move along the carrier so as to drive the conveying brackets to convey the battery cells.