A chain tensioning device and a paver
By designing an adjustable chain tensioning device, the problem of unadjustable chain tension and sag in the prior art is solved, and the effective jointing between the chain and the sprocket and the improvement of paving quality are achieved.
Patent Information
- Application Number
- CN202211499056.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-11-28
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2042-11-28
AI Technical Summary
During construction, existing hydraulic telescopic screeds need to adjust the segment difference of adjacent screed sections, resulting in unadjustable tension and sag in chain transmission, resulting in chain tooth jumps, poor torque transmission, abnormal wear and breakage, affecting paving quality.
A chain tensioning device is designed, including a support rod, a first fixing block, a second fixing block, a tensioning rod and an adjustment rod. By rotating the tensioning rod and an adjustment rod, the tensioning and sag of the chain are adjusted to ensure that the chain and the sprocket are effectively engaged.
The chain tension and sag are adjusted, avoiding chain tooth jumps and abnormal wear, ensuring the effectiveness of chain transmission and paving quality.
Smart Images
Figure CN115823196B_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of construction machinery, and relates to a chain tensioning device and a paver. Background Art
[0002] Pavers are mainly used for the paving operations of the base and surface layers of high-grade highways, and usually include a feeding device, a material distributing device, a traveling device, a screed, etc. The screed is mainly used for leveling, ramming and ironing the paving material, and the flatness is one of the key parameters determining the paving quality. In the screed, for a hydraulically telescopic screed, during construction, it is necessary to adjust the step difference between adjacent screed sections to obtain excellent flatness. In order to reduce the labor force, when usually adjusting the step difference between adjacent screed sections, chain drive and hydraulic drive are adopted, which requires tensioning of the drive chain.
[0003] At present, for the chain drive for adjusting the step difference between adjacent screed sections of a hydraulically telescopic screed in the market, a horizontal arrangement is adopted (the sprocket centers are parallel and perpendicular to the ground), and a tensioning ring is arranged between the two sprockets to tension the chain. The tension degree is non-adjustable. This tensioning method reduces the chain wrap angle, and the phenomenon of tooth skipping often occurs, and the chain drive cannot effectively transmit torque. In addition, a drag link plate is adopted to reduce the chain sag, and the chain sag is also non-adjustable. The sprocket and the chain cannot be effectively engaged, resulting in abnormal wear and even chain breakage. The interruption of the step difference adjustment of the screed will affect the paving flatness of the road surface, and further affect the paving quality. Seriously, it will cause construction interruption or even rework, resulting in significant losses. Summary of the Invention
[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a chain tensioning device and a paver, which can adjust the chain tension degree and the chain sag, ensure the effective engagement between the chain and the sprocket, and avoid abnormal wear.
[0005] To achieve the above purpose, the present invention is implemented by adopting the following technical solution:
[0006] A chain tensioning device includes a support rod, a first fixing block, a second fixing block, a tensioning rod for adjusting the distance between the first fixing block and the second fixing block, and an adjusting rod for adjusting the chain sag. The support rod is provided with a first mounting hole for mounting the tensioning rod and a second mounting hole for mounting the adjusting rod. The tensioning rod is rotatably connected to the first mounting hole, and the adjusting rod is slidably connected to the second mounting hole. The first fixing block and the second fixing block are respectively arranged between the tensioning rod and the adjusting rod. The tensioning rod passes through the first fixing block and the second fixing block, and the adjusting rod passes through the first fixing block and the second fixing block. The tensioning rod is respectively threadedly connected to the first fixing block and the second fixing block, and the adjusting rod is respectively slidably connected to the first fixing block and the second fixing block. The first fixing block and the second fixing block are respectively provided with sleeves for adjusting the chain tension degree, and the chain is arranged between the sleeves.
[0007] Optionally, a locking device for fixing the tension rod and the adjusting rod is provided on the support rod.
[0008] Optionally, the locking device includes threads, a first nut and a second nut. The threads are provided on the side walls of the adjusting rod and the tension rod and the hole walls of the first mounting hole and the second mounting hole. The tension rod is threadedly connected to the first mounting hole, the adjusting rod is threadedly connected to the second mounting hole, the first nuts are respectively provided on both sides of the support rod and are threadedly connected to the tension rod, and the second nuts are respectively provided on both sides of the support rod and are threadedly connected to the adjusting rod.
[0009] Optionally, a roller for supporting the chain is sleeved on the adjusting rod. The inner cylinder wall of the roller is slidably connected to the side wall of the adjusting rod. The roller is provided between the first fixing block and the second fixing block, and the outer cylinder wall of the roller is rollingly connected to the chain.
[0010] Optionally, the thread directions of the tension rod threaded connection with the first fixing block and the second fixing block are opposite.
[0011] Optionally, the adjusting rod includes a mounting rod and a smooth rod. The end of the smooth rod is connected to the end of the mounting rod. The mounting rod is slidably connected to the second mounting hole, the smooth rod is slidably connected to the first fixing block and the second fixing block, and the central axis of the smooth rod has an eccentricity relative to the central axis of the mounting rod.
[0012] Optionally, the middle section of the cross-section of the second mounting hole is rectangular, and both ends are semi-circular.
[0013] Optionally, adjusting square heads are respectively provided at the ends of the tension rod and the adjusting rod.
[0014] Optionally, the inner cylinder wall of the sleeve is respectively rotatably connected to the first fixing block and the second fixing block, and the outer cylinder wall of the sleeve is rollingly connected to the chain.
[0015] A paver includes the chain tensioning device of the above technical solution.
[0016] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:
[0017] The present invention provides a chain tensioning device and a paver. By rotating the tension rod, the distance between the first fixing block and the second fixing block is adjusted, and further the distance between the sleeves is adjusted, so as to adjust the chain tension;
[0018] By rotating the adjusting rod and changing the position of the adjusting rod in the second mounting hole, the sag of the chain is adjusted, ensuring the effective engagement between the chain and the sprocket, and solving the abnormal wear of the chain skipping teeth under the horizontal layout condition. Description of the Drawings
[0019] Figure 1 The figure shows a top view of an embodiment of the present invention;
[0020] Figure 2 The figure shows a schematic diagram of an adjusting rod of an embodiment of the present invention;
[0021] Figure 3 The figure shows Figure 1 a schematic diagram of the support rod in
[0022] In the figure: 1, sleeve; 2, adjusting rod; 3, tension rod; 4, first fixing block; 5, first mounting hole; 6, chain; 7, second fixing block; 8, support rod; 9, first nut; 10, second nut; 11, second mounting hole; 12, mounting rod; 13, smooth rod; 14, roller; 15, adjusting square head. Detailed implementation manners
[0023] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.
[0024] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.
[0025] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.
[0026] Embodiment 1
[0027] As Figures 1 to 3As shown in the figure, a chain tensioning device includes a support rod 8, a first fixing block 4, a second fixing block 7, a tensioning rod 3 for adjusting the distance between the first fixing block 4 and the second fixing block 7, and an adjusting rod 2 for adjusting the sag of the chain. The side wall of the tensioning rod 3 is provided with threads. There are two first nuts 9 on the tensioning rod 3. The support rod 8 is provided with a first mounting hole 5 for mounting the tensioning rod 3. The first nuts 9 are respectively arranged on both sides of the support rod 8 and are threadedly connected to the tensioning rod 3. The tensioning rod 3 is threadedly connected to the first mounting hole 5. The first nuts 9 facilitate the fixing of the tensioning rod 3;
[0028] The adjusting rod 2 includes a mounting rod 12 and a smooth rod 13. The side wall of the mounting rod 12 is provided with threads. The end of the smooth rod 13 is connected to the end of the mounting rod 12. The central axes of the mounting rod 12 and the smooth rod 13 are not on the same straight line. The central axis of the smooth rod 13 deviates 1 cm relative to the central axis of the mounting rod 12. The support rod 8 is provided with a second mounting hole 11 for mounting the adjusting rod 2. The middle section of the cross-section of the second mounting hole 11 is rectangular, and the two ends are respectively semi-circular. The mounting rod 12 is threadedly connected to the second mounting hole 11. The mounting rod 12 can slide horizontally in the second mounting hole 11. There are two second nuts 10 on the mounting rod 12. The second nuts 10 are respectively arranged on both sides of the support rod 8 and are threadedly connected to the mounting rod 12. The second nuts 10 facilitate the fixing of the adjusting rod 2.
[0029] The first fixing block 4 and the second fixing block 7 are respectively arranged between the tensioning rod 3 and the adjusting rod 2. One end of the tensioning rod 3 passes through the first fixing block 4 and one end of the second fixing block 7. The other end of the smooth rod 13 passes through the other end of the first fixing block 4 and the other end of the second fixing block 7. The tensioning rod 3 is threadedly connected to the first fixing block 4 and the second fixing block 7 respectively. The thread directions of the tensioning rod 3 threadedly connected to the first fixing block 4 and the second fixing block 7 are opposite. The smooth rod 13 is slidably connected to the first fixing block 4 and the second fixing block 7 respectively. Vertically, sleeves 1 for adjusting the tension of the chain 6 are respectively provided at the upper ends of the first fixing block 4 and the second fixing block 7. The chain 6 is arranged between the two sleeves 1. The inner barrel walls of the sleeves 1 are rotatably connected to the first fixing block 4 and the second fixing block 7 respectively. The outer barrel walls of the sleeves 1 are in rolling connection with the chain 6. The sleeves 1 can reduce the wear of the chain 1.
[0030] Embodiment 2
[0031] As Figures 1 to 3 shown, different from Embodiment 1, in this embodiment, a roller 14 for supporting the chain is sleeved on the smooth rod 13. The roller 14 is arranged between the first fixing block 4 and the second fixing block 7. The inner barrel wall of the roller 14 is slidably connected to the side wall of the smooth rod 13. The outer barrel wall of the roller 14 is in rolling connection with the chain 6. The roller 14 can reduce the wear of the chain 6.
[0032] The end parts of the tension rod 3 and the mounting rod 12 are respectively provided with adjusting square heads 15, which facilitate the rotation of the tension rod 3 and the adjusting rod 2.
[0033] A paver includes the chain tensioning device of the above technical solution.
[0034] When this embodiment is applied, the two sprockets are horizontally arranged, the sprocket 6 can only rotate around the axis, and the chain 6 meshes with the two sprockets; the support rod 8 is fixed and cannot move, and both the first nut 9 and the second nut 10 are locked; during the chain transmission process, the drum 14 supports the chain 6 and rotates under the friction of the chain 6; the two sleeves 1 clamp the chain 6 and rotate under the friction of the chain 6.
[0035] Loosen the first nut 9, rotate the tension rod 3 through the adjusting square head 15, and the first fixing block 4 and the second fixing block 7 move in the opposite direction along the axis of the tension rod 3 and slide along the adjusting rod 2 at the same time to adjust the tension of the chain 6; loosen the second nut 10, rotate and move the adjusting rod 2 through the adjusting square head 15, and the other ends of the first fixing block 4, the drum 14 and the other end of the second fixing block 7 rotate slightly around the axis of the tension rod 3 to adjust the sag of the chain 6.
[0036] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can still be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.
Claims
1. A chain tensioning device, characterized in that: it includes a support rod, a first fixing block, a second fixing block, a tensioning rod for adjusting the distance between the first fixing block and the second fixing block, and an adjusting rod for adjusting the sag of the chain. The support rod is provided with a first mounting hole for mounting the tensioning rod and a second mounting hole for mounting the adjusting rod. The tensioning rod is rotatably connected to the first mounting hole, and the adjusting rod is slidably connected to the second mounting hole. The first fixing block and the second fixing block are respectively arranged between the tensioning rod and the adjusting rod. The tensioning rod passes through the first fixing block and the second fixing block, and the adjusting rod passes through the first fixing block and the second fixing block. The tensioning rod is threadedly connected to the first fixing block and the second fixing block respectively, and the adjusting rod is slidably connected to the first fixing block and the second fixing block respectively. The first fixing block and the second fixing block are respectively provided with sleeves for adjusting the chain tension. The chain is arranged between the sleeves. The support rod is provided with a locking device for fixing the tensioning rod and the adjusting rod; the adjusting rod includes a mounting rod and a smooth rod. The end of the smooth rod is connected to the end of the mounting rod. The mounting rod can slide horizontally in the second mounting hole. The first fixing block and the second fixing block can slide back and forth along the smooth rod. The central axis of the smooth rod has an eccentricity relative to the central axis of the mounting rod; a roller for supporting the chain is sleeved on the smooth rod. The inner barrel wall of the roller is slidably connected to the side wall of the smooth rod. The roller is arranged between the first fixing block and the second fixing block. The outer barrel wall of the roller is in rolling connection with the chain; the thread directions of the tensioning rod threaded connection with the first fixing block and the second fixing block are opposite; the chain is horizontally arranged, and the adjusting rod is horizontally arranged below the chain. The tensioning rod and the adjusting rod are arranged parallel to each other.
2. A chain tensioning device according to claim 1, characterized in that: the locking device includes threads, a first nut and a second nut. The threads are arranged on the side walls of the adjusting rod, the tensioning rod and the hole walls of the first mounting hole and the second mounting hole. The tensioning rod is threadedly connected to the first mounting hole, and the adjusting rod is threadedly connected to the second mounting hole. The first nuts are respectively arranged on both sides of the support rod and are threadedly connected to the tensioning rod. The second nuts are respectively arranged on both sides of the support rod and are threadedly connected to the adjusting rod.
3. A chain tensioning device according to claim 1, characterized in that: the middle section of the cross-section of the second mounting hole is rectangular, and both ends are semicircular.
4. A chain tensioning device according to claim 1, characterized in that: adjusting square heads are respectively arranged at the ends of the tensioning rod and the adjusting rod.
5. A chain tensioning device according to claim 1, characterized in that: the inner barrel walls of the sleeves are respectively rotatably connected to the first fixing block and the second fixing block, and the outer barrel walls of the sleeves are in rolling connection with the chain.
6. A paver, characterized in that: it includes the chain tensioning device according to any one of claims 1 to 5.
Citation Information
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