An equal-force scraping tool and its working method

Abstract

The present invention relates to a force-equalizing scraping tool and its working method, including a bracket, on which a pair of rake rods that can swing relatively reversely up and down are provided. The rear parts of this pair of rake rods are respectively hinged to the bracket, and a linkage mechanism for controlling the relative reverse swing of this pair of rake rods is provided on the bracket. The force-equalizing scraping tool of the present invention is reasonably designed, can adapt to uneven surfaces, has good flexibility and strong practicability, and the scraping forces of each rake rod are uniform, avoiding excessive pressure on the corresponding rake rod due to local protrusions on the surface or too small pressure on the corresponding rake rod due to local depressions on the surface.

Description

Technical Field

[0001] The present invention relates to a force - equalizing scraper and its working method. Background Art

[0002] Currently, for scrapers with rake rods on the market, such as back scratchers, agricultural rakes, etc., their rake rods are fixedly arranged. When the surface to be scraped is uneven, when the rake rod encounters a convex part and is pushed upward, the scraping force of this rake rod on the convex part also increases accordingly, while the scraping force of other rake rods decreases or there is no pressure, resulting in uneven scraping force. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a force - equalizing scraper with good flexibility, which can adapt to uneven surfaces and has uniform scraping force, and its working method.

[0004] The present invention is implemented as follows: A force - equalizing scraper includes a bracket, and a pair of rake rods that can swing relatively reversely up and down are provided on the bracket. The rear parts of this pair of rake rods are respectively hinged to the bracket, and a linkage mechanism for controlling the relative reverse swing of this pair of rake rods is provided on the bracket.

[0005] Further, the linkage mechanism includes a connecting ring A and a pull rope A passing through the connecting ring A. The two ends of the pull rope A are respectively connected to the rear ends of the rake rods, so that when one rake rod swings upward, the other rake rod is pulled to swing downward through the pull rope.

[0006] Further, there are an even number of pairs of rake rods on the bracket and they are grouped in pairs. The connecting rings A on the linkage mechanisms of the two pairs of rake rods in the same group are connected together by a pull rope B, and the pull rope B passes through a connecting ring B.

[0007] Further, the linkage mechanism includes two oil cylinders respectively located above or below the rear ends of this pair of rake rods. A piston rod that can slide relative to it is sleeved on the oil cylinder. The inner cavities of the two oil cylinders are connected, and the piston rods of the oil cylinders are connected to the rear ends of the corresponding rake rods through a linkage rod. The two ends of the linkage rod are respectively hinged to the rake rod and the piston rod.

[0008] Further, there are several pairs of rake rods on the bracket, and the inner cavities of the oil cylinders in the linkage mechanisms of each pair of rake rods are all connected.

[0009] Further, the linkage mechanism includes a pair of connecting rods A that are respectively movably connected to the rear ends of this pair of rake rods and can swing left and right relative to the rake rods. A connecting seat is arranged in the middle of this pair of connecting rods A. A connecting plate A that can rotate in a vertical plane is installed on the front side of the connecting seat. Through holes for the two connecting rods A to pass through are respectively opened at both ends of the connecting plate A, and there is a gap between the connecting rod A and the through hole.

[0010] Furthermore, the bracket has an even number of pairs of rake rods and they are arranged in groups of two. The rear side of the connecting seat of each pair of rake rod linkage mechanisms is connected to a connecting rod B extending backward. The connecting seat is installed on a vertical guide column passing through the middle thereof and can slide up and down. A connecting plate B is connected between the two connecting rods B of the two pairs of rake rod linkage mechanisms in the same group. The connecting plate B is rotatably connected to the bracket in the middle and can rotate in a vertical plane. Long holes are provided at both ends of the connecting plate B for the connecting rod B to pass through, and the length direction of the long hole is parallel to the length direction of the connecting plate B.

[0011] Furthermore, a connecting shaft for hingedly connecting the rake rod is arranged in the horizontal direction on the bracket, and a vertical long hole for the rake rod to pass through is arranged at the front end of the bracket.

[0012] Furthermore, a downwardly bent hook portion is provided at the front end of the rake rod.

[0013] Another technical solution of the present invention: a working method of the uniform force scraper as described above, wherein a pair of rake rods on the uniform force scraper bracket are performing scraping, and when one of the rake rods swings up when encountering a surface protrusion, the other rake rod is driven to swing down through a linkage mechanism, so that the scraping force of the pair of rake rods is uniform.

[0014] Compared with the prior art, the present invention has the following beneficial effects: the uniform force scraper of the present invention is reasonably designed, can adapt to uneven surfaces, has good flexibility and strong practicality, and the scraping force of each rake rod is uniform, avoiding excessive rake rod pressure at corresponding positions due to local protrusions on the surface or excessive rake rod pressure at corresponding positions due to local depressions on the surface.

[0015] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through specific embodiments and related drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a top view of the structure of embodiment 1 of the present invention;

[0017] Figure 2 This is a side view of a connection between a rake rod and a linkage mechanism in one embodiment of the present invention;

[0018] Figure 3 is a side view of another connection between a rake rod and a linkage mechanism according to Embodiment 1 of the present invention;

[0019] Figure 4 is a top view of the structure of the second embodiment of the present invention;

[0020] Figure 5 is a side view of the connection between the rake rod and the linkage mechanism of the second embodiment of the present invention;

[0021] Figure 6 yes Figure 4 K-direction view;

[0022] Figure 7 It is the top view of the structure of the third embodiment of the present invention;

[0023] Figure 8 It is Figure 7 the A-A view of;

[0024] Figure 9 It is Figure 7 the B-B view of;

[0025] Explanation of the reference numerals in the figure: 100 - bracket, 110 - rake rod, 120 - linkage mechanism, 121 - connecting ring A, 122 - pull rope A, 123 - oil cylinder, 124 - linkage rod, 125 - connecting rod A, 126 - vertical guide post, 127 - connecting seat, 128 - connecting plate A, 129 - through hole, 130 - pull rope B, 140 - connecting ring B, 150 - connecting rod B, 160 - connecting plate B, 161 - long hole. Specific implementation mode

[0026] Embodiment 1: As shown in Figures 1 - 3 , a force - equalizing scraper includes a bracket 100. A pair of rake rods 110 that can swing relatively reversely up and down are provided on the bracket 100. The rear parts of this pair of rake rods 110 are respectively hinged to the bracket. A linkage mechanism 120 for controlling this pair of rake rods 110 to swing relatively reversely is provided on the bracket 100. When this pair of rake rods perform scraping operations, if the surface is uneven, when one rake rod swings upward, its rear end will drive the other rake rod to swing downward through the linkage mechanism. Since this pair of rake rods are connected by the linkage mechanism, it can ensure that the rake rods are evenly stressed, so there is an even scraping force on the surface being scraped.

[0027] In this embodiment, the linkage mechanism 120 includes a connecting ring A 121 and a pull rope A 122 passing through the connecting ring A. The two ends of the pull rope A are respectively connected to the rear ends of the rake rods so that when one rake rod swings upward, it pulls the other rake rod to swing downward through the pull rope. The tensions at both ends of the same pull rope are the same. Therefore, when one rake rod swings upward and pulls the other rake rod to swing downward through the pull rope, it can ensure that the downward pressures at the front ends of the two rake rods are the same or approximately the same.

[0028] In this embodiment, the connecting ring A can be located above the middle of the rear ends of this pair of rake rods, as shown in Figure 3 ; it can also be located behind the middle of this pair of rake rods. The rear ends of this pair of rake rods have downward - bent elbows, and the two ends of the pull rope A are respectively connected to the lower ends of the elbows of this pair of rake rods, as shown in Figure 2 .

[0029] In this embodiment, the bracket 100 has two pairs of rake rods. In the specific implementation process, the rake rods can also be an even number of pairs greater than two pairs and are grouped in pairs. The connecting rings A121 on the two pairs of rake rod linkage mechanisms in the same group are connected together by a pull rope B130. The pull rope B130 passes through a connecting ring B140. The connecting ring B150 is fixed to the rear part of the bracket. By connecting the connecting rings on the two pairs of rake rod linkage mechanisms in the same group through the pull rope B130, the two pairs of four rake rods in the same group can have uniform scraping force.

[0030] In this embodiment, a connecting shaft for hinged rake rods is arranged horizontally on the bracket, and all rake rods are hinged on the connecting shaft. A vertical long hole for the rake rods to pass through is arranged at the front end of the bracket, and the vertical long hole can limit the maximum distance of the rake rods swinging up and down.

[0031] In this embodiment, a hook portion bent downward is provided at the front end of the rake rod 110 .

[0032] A working method of the force-equalizing scraper as described above, wherein a pair of rake rods on a support of the force-equalizing scraper are performing scraping and raking, and when one of the rakes encounters a surface protrusion and swings upward, the other rake rod is driven to swing downward by a linkage mechanism (i.e., pull rope A), so that the scraping force of the pair of rake rods is uniform; a group of two pairs of rake rods on the support of the force-equalizing scraper are performing scraping and raking, and when one of the pairs of rakes encounters a surface protrusion and swings upward, the other pair of rake rods is driven to swing downward by a pull rope B, so that the scraping force of the group of rake rods is uniform.

[0033] Embodiment 2: Figures 4 - 6 As shown, the difference between this embodiment and implementation one lies in the different structure of the linkage mechanism. In this embodiment, the linkage mechanism 120 includes two oil cylinders 123 respectively located below the rear end of the pair of rake rods, and the oil cylinders are provided with piston rods that can slide relative to them, and the lower ends of the oil cylinders are fixed on the bracket; in the specific implementation process, the oil cylinders can also be located above the rake rods and the piston rods are arranged in a directional manner; the inner cavities of the two oil cylinders 123 are connected, and the piston rods of the oil cylinders 123 are connected to the rear ends of the corresponding rake rods through a linkage rod 124, and the two ends of the linkage rod 124 are respectively hinged on the rake rods and the piston rods of the oil cylinders; since the rear ends of the pair of rake rods are connected to the two connected oil cylinders, when the pair of rake rods are performing scraping and raking operations, if the surface is uneven, when one of the rake rods is swung up, its rear end will force the other rake rod to swing down through the hydraulic oil in the oil chamber, which can ensure that the pair of rake rods have uniform downward pressure.

[0034] In this embodiment, the bracket 100 has two pairs of rake rods. In the specific implementation process, the number of rake rods may be greater than two pairs, and the inner cavities of the cylinders in each pair of climbing rod linkage mechanisms are connected, and the cylinders of each rake rod are connected, which can ensure that all rake rods have a relatively uniform scraping force.

[0035] A working method of the equal-force scraping tool as described above. When a pair of rake rods on the equal-force scraping tool bracket are scraping, when one of the scrapers encounters a surface protrusion and swings upward, the hydraulic oil in the linkage mechanism drives the other rake rod to swing downward, so that the scraping forces of the pair of rake rods are uniform; when a group of two pairs of rake rods on the equal-force scraping tool bracket are scraping, when one pair of scrapers encounters a surface protrusion and swings upward, the other pair of rake rods are driven to swing downward through the hydraulic oil, so that the scraping forces of the group of rake rods are uniform.

[0036] Embodiment 3: As Figures 7 - 8 shown, the difference between this embodiment and Embodiment 1 lies in the structure of the linkage mechanism. In this embodiment, the linkage mechanism 120 includes a pair of connecting rods A125 that are respectively movably connected to the rear ends of the pair of rake rods and can swing left and right relative to the rake rods. A connecting seat 127 is arranged in the middle of the pair of connecting rods A. A connecting plate A128 that can rotate in a vertical plane is installed on the front side of the connecting seat. Through holes 129 for the two connecting rods A to pass through are respectively opened at both ends of the connecting plate A. A gap is left between the connecting rod A and the through hole to ensure that the connecting rod A and the through hole are not stuck; when the pair of rake rods are performing scraping operations, if the surface is uneven, when one of the rake rods swings upward, its rear end will drive the same end of the connecting plate A to swing downward through the connecting rod A, and then make the other end of the connecting plate A swing upward, driving the other rake rod to swing downward. The connecting plate A is equivalent to a seesaw mechanism, which can ensure that the pair of rake rods have uniform downward pressure.

[0037] In this embodiment, there are two pairs of rake rods on the bracket 100. In the specific implementation process, the rake rods can also be an even number greater than two pairs and are grouped in pairs. A connecting rod B150 extending backward is connected to the rear side of the connecting seat of the linkage mechanism of each pair of rake rods. The connecting seat is installed on a vertical guide post 126 passing through the middle thereof and can slide up and down. The lower end of the vertical guide post 126 is fixed to the bracket. A connecting plate B160 is connected between the two connecting rods B of the linkage mechanisms of the two pairs of rake rods in the same group. The middle of the connecting plate B is rotatably connected to the bracket and can rotate in a vertical plane. Long holes 161 for the connecting rods B to pass through are opened at both ends of the connecting plate B. The length direction of the long hole is parallel to the length direction of the connecting plate B. The connecting rod B can slide in the long hole. The two connecting seats corresponding to the two pairs of rake rods in the same group are connected by the connecting plate B160 with a similar seesaw structure, which can realize that the four rake rods of the two pairs in the same group have uniform scraping forces.

[0038] A working method of the equal-force scraping tool as described above. When a pair of rake rods on the equal-force scraping tool bracket are scraping, when one of the scrapers encounters a surface protrusion and swings upward, the other rake rod is driven to swing downward through the linkage mechanism, so that the scraping forces of the pair of rake rods are uniform; when a group of two pairs of rake rods on the equal-force scraping tool bracket are scraping, when one pair of scrapers encounters a surface protrusion and swings upward, the other pair of rake rods are driven to swing downward through the connecting rod B, the connecting plate B and the connecting seat, so that the scraping forces of the group of rake rods are uniform.

[0039] Unless otherwise stated, for any of the technical solutions disclosed in the present invention above, if it discloses a numerical range, the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is only the numerical values with obvious technical effects or representativeness among many implementable numerical values. Since there are too many numerical values to list exhaustively, only some numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention. Moreover, the listed numerical values should not constitute a limitation on the protection scope of the present invention.

[0040] If the present invention discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), or can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integral structure (for example, manufactured by integral forming using a casting process) (except where it is obviously impossible to use the integral forming process).

[0041] In addition, unless otherwise stated, the terms used to represent the positional relationship or shape in any of the technical solutions disclosed in the present invention above include states or shapes that are approximate, similar, or close to them.

[0042] Any component provided by the present invention can either be assembled from multiple separate components or be a single component manufactured by an integral forming process.

[0043] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the specific implementation manners of the present invention or make equivalent replacements for some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. An equal-force scraping tool, characterized in that: it includes a bracket, and a pair of rake rods capable of swinging relatively reversely up and down are arranged on the bracket. The rear parts of the pair of rake rods are respectively hinged to the bracket, and a linkage mechanism for controlling the pair of rake rods to swing relatively reversely is arranged on the bracket; when the pair of rake rods on the equal-force scraping tool bracket are scraping, when one of the scrapings encounters a surface protrusion and swings upward, the other rake rod is driven to swing downward through the linkage mechanism, so that the scraping forces of the pair of rake rods are uniform; the linkage mechanism includes a pair of connecting rods A respectively movably connected to the rear ends of the pair of rake rods and capable of swinging left and right relative to the rake rods. A connecting seat is arranged between the pair of connecting rods A. A connecting plate A capable of rotating in a vertical plane is installed on the front side of the connecting seat. Through holes for the two connecting rods A to pass through are respectively opened at both ends of the connecting plate A, and a gap is left between the connecting rod A and the through hole; there are an even number of pairs of rake rods on the bracket and they are grouped in pairs. A connecting rod B extending backward is connected to the rear side of the connecting seat of the linkage mechanism of each pair of rake rods. The connecting seat is installed on a vertical guide post passing through the middle thereof and can slide up and down. A connecting plate B is connected between the two connecting rods B of the linkage mechanisms of the two pairs of rake rods in the same group. The middle of the connecting plate B is rotatably connected to the bracket and can rotate in a vertical plane. Long holes for the connecting rods B to pass through are opened at both ends of the connecting plate B, and the length direction of the long holes is parallel to the length direction of the connecting plate B.

2. The equal-force scraping tool according to claim 1, characterized in that: a connecting shaft for hinging the rake rod is arranged horizontally on the bracket, and a vertical long hole for the rake rod to pass through is arranged at the front end of the bracket.

3. The equal-force scraping tool according to claim 1, characterized in that: a downwardly bent hook portion is provided at the front end of the rake rod.

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