Chain transmission unit for cooling bed steel discharging machine
By designing guide plates and spring pre-tensioning mechanisms on the cooling bed steel bar conveying machine, the problem of slack and sagging of the transmission chain was solved, ensuring stable chain operation and improving the transmission efficiency and production continuity of steel bars.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI ZHENGDA MASCH MFG CO LTD
- Filing Date
- 2025-05-15
- Publication Date
- 2026-05-05
AI Technical Summary
The existing cold bed steel bar conveying machine's transmission chain is prone to slack and sagging, resulting in low steel bar transmission efficiency and unreal-time tension adjustment, which affects production.
Design a chain transmission unit that uses guide plates and spring pretensioning mechanism to ensure that the chain is always taut and that the guide plates keep the chain running parallel. Combined with a fixedly installed sprocket assembly, the chain pitch is extended to prevent the steel bar from looping.
This achieves stable transmission of steel bars, avoids chain sagging and looping, and improves transmission efficiency and production continuity.
Smart Images
Figure CN224198509U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of large bar conveying and transfer equipment, and in particular to a chain transmission unit for a cold bed steel ballast machine. Background Technology
[0002] In steel production workshops, large steel bar workpieces, after undergoing rolling, forging, and other processes, are often difficult to transfer directly to the next processing station due to their size. Therefore, large-area cooling beds are typically used for conveying them. These cooling beds employ chain supports and large-sized transmission chains, with multiple parallel chains circulating to support and transport the steel bars forward. However, current cooling bed transmission chain structures suffer from slack over time due to tensioning mechanisms loosening or fatigue, and the long chains themselves easily sag. When the chains become loose, the steel bars entering the cooling bed's chain stacking machine often only loop without moving, severely impacting transmission efficiency. Furthermore, current cooling bed chain tensioning is primarily rigid, requiring manual adjustment and preventing real-time chain adjustments, thus disrupting production. Utility Model Content
[0003] The purpose of this invention is to address the above-mentioned issues by providing a chain transmission unit for a cold bed steel bar trolley. This chain transmission unit achieves stable operation of the steel support chain by changing its own structure, ensuring that the steel bars do not loop and operate efficiently.
[0004] The specific solution of this utility model is as follows: a chain transmission unit for a cold bed steel bar conveying machine, having a mounting frame composed of two parallel steel plates, with a guide strip between the two steel plates connecting them into one piece; a first sprocket set and a second sprocket set are respectively installed at both ends of the mounting frame, and two adjusting plates arranged opposite each other at the bottom of the mounting frame, with a third sprocket set installed between the two adjusting plates, each adjusting plate having a set of spring pre-tensioning mechanisms, the two sets of spring pre-tensioning mechanisms being elastically connected to both ends of the wheel axle of the third sprocket set; an extension support plate is also provided at the bottom of the two adjusting plates, and a fourth sprocket set is provided on the extension support plate, the fourth sprocket set being a power input sprocket set; a steel support chain is sequentially wound around the first sprocket set, the second sprocket set, the third sprocket set, and the fourth sprocket set, the steel support chain being used to lift the steel bars and move them forward for conveying.
[0005] Furthermore, the spring preload mechanism of this utility model includes a transverse sliding groove hole arranged on a corresponding adjustment plate. A sliding block is slidably mounted in the transverse sliding groove hole. The sliding block is connected to the end of the axle of the third sprocket set. The sliding block is also provided with a first sleeve rod, which is transversely placed in the transverse sliding groove hole. A tightening bolt is threaded on the side of the adjustment plate corresponding to the transverse sliding groove hole. The front end of the tightening bolt extends into the transverse sliding groove hole and is opposite to the first sleeve rod. A sliding nut is also threaded on the tightening bolt located in the transverse sliding groove hole. A preload spring is fixedly connected to the inner wall of the sliding nut. The preload spring is simultaneously sleeved on the tightening bolt and the first sleeve rod. One end of the preload bolt is connected to the sliding nut, and the other end of the preload spring rests on the sliding block.
[0006] Furthermore, in this invention, the upper and lower surfaces of the sliding block are sliding planes and are slidably connected to the transverse sliding groove hole; the upper and lower surfaces of the sliding nut are also slidably connected to the transverse sliding groove hole.
[0007] Furthermore, in this utility model, the guide bar is a single strip plate disposed between two steel plates, and the supporting steel chain is dragged along the guide bar.
[0008] Furthermore, in this utility model, the first sprocket group, the second sprocket group, the third sprocket group and the fourth sprocket group have the same structure, each having a sprocket shaft, with 2 to 4 sprockets coaxially arranged on the sprocket shaft, all sprockets operating synchronously, and each sprocket having a corresponding steel chain fitted on it.
[0009] Furthermore, in this utility model, the steel chain wound on the third and fourth sprocket sets is wound diagonally.
[0010] The present invention achieves the following beneficial effects:
[0011] 1. By designing a guide plate located below the steel support chain, the steel support chain maintains a relatively level running state during steel bar transfer operations. The steel support chain moves along the guide plate, preventing the steel bars from spinning in place due to the chain sag, thus ensuring the stability of the entire conveying process.
[0012] 2. This utility model uses a spring pre-tensioning mechanism to support the tension adjustment of the steel support chain. This new tensioning method ensures that the third sprocket group always maintains elastic tension on the steel support chain, which can effectively prevent the steel support chain from derailing.
[0013] 3. The first and second sprocket groups at both ends of this utility model are installed in a fixed manner, and during actual installation, they are extended to both sides by a chain pitch length, which can better ensure the normal operation of the steel rods on the steel support chain without coiling. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure from the main view direction of this utility model;
[0015] Figure 2 This is a top view structural diagram of this utility model;
[0016] Figure 3 yes Figure 1 Enlarged schematic diagram of the structure at point K.
[0017] In the diagram: 1—First sprocket assembly, 2—Steel plate, 3—Steel support chain, 4—Adjusting plate, 5—Second sprocket assembly, 6—Fourth sprocket assembly, 7—Extended support plate, 8—Tightening bolt, 9—Sprocket shaft, 10—Guide strip plate, 11—Sprocket, 12—Sliding nut, 13—Preload spring, 14—First sleeve rod, 15—Sliding block, 16—Third sprocket assembly, 17—Transverse sliding groove hole. Detailed Implementation
[0018] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," etc., indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0019] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0020] See Figures 1-3 This utility model relates to a chain transmission unit for a cold bed steel trolley, comprising a mounting frame composed of two parallel steel plates 2, with a guide strip 10 between the two steel plates, connecting them into a single unit. Furthermore, the guide strip in this utility model is a single, integral strip positioned between the two steel plates, and the steel-supporting chain 3 is dragged along the guide strip. A first sprocket set 1 and a second sprocket set 5 are respectively mounted at both ends of the mounting frame. Two adjusting plates 4 arranged opposite each other are located at the bottom of the mounting frame, with a third sprocket set 16 between the two adjusting plates. Each adjusting plate is equipped with a spring preload mechanism, and the two spring preload mechanisms are... The first sprocket group, the second sprocket group, the third sprocket group, and the fourth sprocket group are elastically connected to the two ends of the axle of the third sprocket group. The bottom of the two adjustment plates is also provided with an extended support plate 7, and the extended support plate is provided with a fourth sprocket group 6. The fourth sprocket group is a sprocket group for power input. The first sprocket group, the second sprocket group, the third sprocket group, and the fourth sprocket group are sequentially wound with supporting steel chains 3. The supporting steel chains are used to lift the steel bar and move it forward for transport. Furthermore, in this utility model, the first sprocket group, the second sprocket group, the third sprocket group, and the fourth sprocket group have the same structure. They all have a sprocket shaft 9, and 2 to 4 sprockets 11 are coaxially arranged on the sprocket shaft. All sprockets operate synchronously, and a supporting steel chain 3 is correspondingly fitted on each sprocket.
[0021] Furthermore, the spring preload mechanism of this utility model includes a transverse sliding groove hole 17, which is arranged on the corresponding adjustment plate. A sliding block 15 is slidably installed in the transverse sliding groove hole. The sliding block is connected to the end of the wheel shaft of the third sprocket set. A first sleeve rod 14 is also provided on the sliding block. The first sleeve rod is placed transversely in the transverse sliding groove hole. A tightening bolt 8 is threaded on the side of the adjustment plate corresponding to the transverse sliding groove hole. The front end of the tightening bolt extends into the transverse sliding groove hole and is opposite to the first sleeve rod. A sliding nut 12 is also threaded on the tightening bolt located in the transverse sliding groove hole. A preload spring 13 is fixedly connected to the inner wall of the sliding nut. The preload spring is simultaneously sleeved on the tightening bolt and the first sleeve rod. One end of the preload bolt is connected to the sliding nut, and the other end of the preload spring rests on the sliding block.
[0022] Furthermore, in this invention, the upper and lower surfaces of the sliding block are sliding planes and are slidably connected to the transverse sliding groove hole; the upper and lower surfaces of the sliding nut are also slidably connected to the transverse sliding groove hole.
[0023] Furthermore, in this utility model, the steel chain wound on the third and fourth sprocket sets is wound diagonally, as shown in the figure below. Figure 1 As shown, the steel chain is obliquely wound from the outside of the fourth sprocket set to the sprocket on the inside of the third sprocket set, which makes it easier to adjust the tension.
[0024] In actual use, this utility model, as one of the units in the entire cooling bed conveyor chain, consists of many units arranged in parallel at a certain interval. Multiple units operate simultaneously to move and convey the steel bars forward one by one. During actual installation, the sprocket shaft of the fourth sprocket group is connected to the output shaft of the external power motor to generate power input.
[0025] The steel chain in this utility model adopts the following... Figure 1 The winding method shown in the diagram involves the sprockets in the third sprocket group winding around the supporting steel chain to achieve tension on the supporting steel chain. However, due to the presence of the spring preload mechanism, the preload spring will always carry the preload force to keep the relevant sprockets pressed against the supporting steel chain, keeping it in a constantly taut state, while also providing elastic buffering. For adjustment here, it is only necessary to tighten or loosen the tightening bolt and adjust the pressure of the sliding nut on the preload spring.
[0026] The guide bar is designed as a single piece, so that when the steel bar is lifted by the steel chain, even if the steel bar is pressed down heavily, the steel chain can still maintain contact with it, thus smoothly carrying the steel bar forward and preventing it from spinning.
[0027] In this invention, a guide plate is designed below the steel support chain to ensure that the steel support chain always maintains a relatively flat running state during the steel bar transfer operation. The steel support chain moves along the guide plate, preventing the steel bars from spinning in place due to the chain sag, thus ensuring the stability of the entire conveying process.
[0028] This invention employs a spring preload mechanism for tension adjustment of the steel support chain. This novel tensioning method ensures that the third sprocket assembly maintains elastic tension on the steel support chain at all times, effectively preventing derailment. The first and second sprocket assemblies at both ends are fixedly installed, and during actual installation, the chain is extended to both sides by one chain pitch length to further ensure the steel bars on the chain do not coil and operate normally.
Claims
1. A chain transmission unit for a steel stacking machine on a cooling bed, characterized in that: The mounting frame consists of two parallel steel plates connected by a guide strip. A first sprocket set and a second sprocket set are mounted at each end of the mounting frame. Two adjusting plates arranged opposite each other are located at the bottom of the mounting frame, with a third sprocket set between them. Each adjusting plate has a spring preload mechanism, which is elastically connected to both ends of the axle of the third sprocket set. An extension support plate is also provided at the bottom of the two adjusting plates, and a fourth sprocket set, which is the power input sprocket set, is mounted on the extension support plate. Steel support chains are sequentially wound around the first, second, third, and fourth sprocket sets, and these chains are used to lift and move the steel bar forward.
2. The chain transmission unit for a cooling bed steel conveying machine according to claim 1, characterized in that: The spring preload mechanism includes a transverse sliding groove hole arranged on a corresponding adjustment plate. A sliding block is slidably mounted in the transverse sliding groove hole. The sliding block is connected to the end of the axle of the third sprocket set. The sliding block is also provided with a first sleeve rod, which is placed transversely in the transverse sliding groove hole. A tightening bolt is threaded on the side of the adjustment plate corresponding to the transverse sliding groove hole. The front end of the tightening bolt extends into the transverse sliding groove hole and is opposite to the first sleeve rod. A sliding nut is also threaded on the tightening bolt located in the transverse sliding groove hole. A preload spring is fixedly connected to the inner wall of the sliding nut. The preload spring is simultaneously sleeved on the tightening bolt and the first sleeve rod. One end of the preload bolt is connected to the sliding nut, and the other end of the preload spring rests on the sliding block.
3. A chain transmission unit for a steel stacking machine on a cooling bed according to claim 2, characterized in that: The upper and lower surfaces of the sliding block are sliding planes and are slidably connected to the transverse sliding groove hole; the upper and lower surfaces of the sliding nut are also slidably connected to the transverse sliding groove hole.
4. A chain transmission unit for a steel stacking machine on a cooling bed according to claim 1, characterized in that: The guide bar is a single strip plate set between two steel plates, and the steel support chain is dragged along the guide bar.
5. A chain transmission unit for a steel stacking machine on a cooling bed according to claim 1, characterized in that: The first, second, third, and fourth sprocket groups have the same structure, each with a sprocket shaft. Two to four sprockets are coaxially arranged on the sprocket shaft, and all sprockets operate synchronously. Each sprocket is fitted with a corresponding steel chain.
6. A chain transmission unit for a steel stacking machine on a cooling bed according to claim 1, characterized in that: The steel chains wound on the third and fourth sprocket sets are arranged in a diagonal manner.