Telescopic scraper mechanism and coal leveling system

Abstract

The utility model relates to the technical field of coal leveling equipment, in particular to a telescopic scraper mechanism and a coal leveling system. The utility model provides a telescopic scraper mechanism. The telescopic scraper mechanism is used for a coal leveling system. The telescopic scraper mechanism is arranged on a lifting frame of the coal leveling system and comprises a fixed scraper assembly, a movable scraper assembly and a driving assembly. The movable scraper assembly is in transmission connection with the driving assembly, and the driving assembly is used for driving the movable scraper assembly to move relative to the fixed scraper assembly so as to adjust the operation width of the telescopic scraper mechanism. The movable scraper assembly is driven by the driving assembly to move relative to the fixed scraper assembly so as to adjust the operation width of the telescopic scraper mechanism, compared with the prior art, the coal leveling operation of different types of carriages can be met through one set of coal leveling system at the same time, the site can be saved, meanwhile, the cost is reduced, and the working efficiency is improved. In addition, maintenance operation in the subsequent application process can be facilitated, and high economic benefits are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal-leveling equipment, in particular to a retractable scraper mechanism and a coal-leveling system. Background Art

[0002] When the loading station is packing fixed-weight coal, the different densities of the coal will result in different volumes of coal loaded into the carriages. Coal with high density will not overflow from the carriage after being loaded into a fixed-volume carriage, while coal with low density will overflow from the upper edge of the carriage after being loaded into a fixed-volume carriage. In order to avoid environmental pollution caused by coal scattering during transportation and the situation of insufficient tonnage, the carriages need to be leveled.

[0003] The process of coal leveling involves two types of carriages, open cars and container cars. Due to the different widths of the two carriages, two types of scrapers with different widths are required. In the existing coal leveling system, each scraper is equipped with a lifting mechanism to control the lifting of the scraper. However, the configuration of two lifting mechanisms will cause the coal leveling system to occupy more space on site and have higher costs. Utility Model Content

[0004] (I) The problem to be solved by the utility model is that each scraper of the existing coal-leveling system needs to be equipped with a lifting mechanism, which causes the coal-leveling system to occupy more space on site and has a high cost.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, the utility model provides a retractable scraper mechanism in one embodiment, which is used in a coal-leveling system. The coal-leveling system includes a gantry frame, a lifting frame and a driving unit; the lifting frame is slidably arranged on the gantry frame, and the driving unit is used to drive the lifting frame to slide on the gantry frame;

[0007] The retractable scraper mechanism is arranged on the lifting frame, and comprises: a fixed scraper assembly, a movable scraper assembly and a driving assembly;

[0008] The movable scraper assembly is transmission-connected to the driving assembly, and the driving assembly is used to drive the movable scraper assembly to move relative to the fixed scraper assembly to adjust the working width of the retractable scraper mechanism.

[0009] Furthermore, the fixed scraper assembly is provided with a receiving space;

[0010] The movable scraper assembly is arranged in the accommodating space, and the driving assembly is used to drive the movable scraper assembly to move in the width direction relative to the fixed scraper assembly so as to extend out of or retract into the accommodating space.

[0011] Further, the fixed scraper assembly includes a front scraper and a rear scraper;

[0012] The front scraper and the rear scraper are spaced apart from each other, and the accommodation space is formed between the front scraper and the rear scraper.

[0013] Further, the moving scraper assembly includes two moving scrapers;

[0014] The two movable scrapers are both transmission-connected to the driving assembly;

[0015] The driving component drives the two movable scrapers to move in opposite directions so that the two movable scrapers extend out of the accommodating space from both ends of the accommodating space, or the driving component drives the two movable scrapers to move toward each other so that the two movable scrapers retract into the accommodating space from both ends of the accommodating space.

[0016] Furthermore, the driving assembly includes a driving motor, a gear and a rack arranged corresponding to the moving scraper;

[0017] The two racks are slidably disposed in the accommodation space and are connected to the corresponding moving scrapers;

[0018] The gear is arranged at the output end of the driving motor, and the driving motor drives the gear to rotate; the two racks are both meshed with the gear, and the tooth surfaces of the two racks are arranged opposite to each other.

[0019] Furthermore, it also includes a guide assembly, which is arranged in the accommodating space; the guide assembly is used to limit the rack, and / or the guide assembly is used to limit the movable scraper.

[0020] Furthermore, the guide assembly includes a guide slideway arranged corresponding to the rack;

[0021] The guide slide is fixed in the accommodating space and extends along the width direction of the fixed scraper assembly, and the rack is slidably arranged in the corresponding guide slide.

[0022] Further, the guide assembly includes a first guide rail and a first guide wheel group corresponding to the rack;

[0023] The first guide wheel set is arranged on the corresponding rack;

[0024] The first guide rail is fixed in the accommodating space and extends along the width direction of the fixed scraper assembly, and the first guide wheel set is slidably connected to the first guide rail.

[0025] Further, the guide assembly includes a second guide rail and a second guide wheel group corresponding to the movable scraper;

[0026] The second guide wheel group is arranged on the corresponding moving scraper;

[0027] The second guide rail is fixed in the accommodating space and extends along the width direction of the fixed scraper assembly, and the second guide wheel set is slidably connected to the second guide rail.

[0028] Another embodiment of the utility model further provides a coal leveling system, comprising the retractable scraper mechanism described in any of the above embodiments.

[0029] Beneficial effects of the utility model:

[0030] The utility model provides a retractable scraper mechanism, which is used in a coal-leveling system, and the coal-leveling system includes a gantry frame, a lifting frame and a driving unit; the lifting frame is slidably arranged on the gantry frame, and the driving unit is used to drive the lifting frame to slide on the gantry frame; the retractable scraper mechanism is arranged on the lifting frame, and includes: a fixed scraper assembly, a movable scraper assembly and a driving assembly; the movable scraper assembly is transmission-connected to the driving assembly, and the driving assembly is used to drive the movable scraper assembly to move relative to the fixed scraper assembly to adjust the working width of the retractable scraper mechanism.

[0031] The driving assembly drives the mobile scraper assembly to move relative to the fixed scraper assembly to adjust the working width of the retractable scraper mechanism. Compared with the existing technology, a set of coal-leveling system can simultaneously meet the coal-leveling operations of different types of carriages, which can save space and reduce costs, and can also facilitate inspection and maintenance operations in subsequent applications, with higher economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A three-dimensional diagram of a retractable scraper mechanism provided by an embodiment of the utility model, wherein: Figure 1 The middle moving scraper extends out of the accommodation space;

[0034] Figure 2 A three-dimensional diagram of a retractable scraper mechanism provided by an embodiment of the utility model, wherein: Figure 2 The middle moving scraper extends out of the accommodation space;

[0035] Figure 3 A first plan view of a retractable scraper mechanism provided by an embodiment of the utility model;

[0036] Figure 4 A second plan view of the retractable scraper mechanism provided by an embodiment of the utility model;

[0037] Figure 5 for Figure 4 Cross-sectional view from medium AA perspective;

[0038] Figure 6 A third plan view of the retractable scraper mechanism provided by an embodiment of the utility model;

[0039] Figure 7 for Figure 6 Cross-section view from the perspective of the middle BB.

[0040] Icons: 1-fixed scraper assembly; 11-front scraper; 12-rear scraper; 13-accommodation space;

[0041] 2-moving scraper assembly; 21-moving scraper;

[0042] 31-driving motor; 32-gear; 33-rack;

[0043] 41-guide slide; 42-first guide wheel group; 421-first guide wheel; 43-first guide rail; 44-second guide wheel group; 441-second guide wheel; 45-second guide rail;

[0044] 5-Device framework. DETAILED DESCRIPTION

[0045] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] like Figures 1 to 7As shown, one embodiment of the utility model provides a retractable scraper mechanism, which is used in a coal-leveling system, and the coal-leveling system includes a gantry frame, a lifting frame and a driving unit; the lifting frame is slidably arranged on the gantry frame, and the driving unit is used to drive the lifting frame to slide on the gantry frame; the retractable scraper mechanism is arranged on the lifting frame, and includes: a fixed scraper assembly 1, a movable scraper assembly 2 and a driving assembly; the movable scraper assembly 2 is transmission-connected to the driving assembly, and the driving assembly is used to drive the movable scraper assembly 2 to move relative to the fixed scraper assembly 1 to adjust the working width of the retractable scraper mechanism.

[0047] The retractable scraper mechanism provided in this embodiment is used in a coal-leveling system, which includes a gantry frame, a lifting frame and a driving unit; a passage for a carriage to pass through is formed below the gantry frame; the two ends of the lifting frame are respectively slidably connected to the two columns of the gantry frame, and the driving unit is transmission-connected to the lifting frame, and is used to drive the lifting frame to slide on the gantry frame, so as to drive the retractable scraper mechanism located on the lifting frame to move toward or away from the carriage. The driving unit can adopt a hydraulic cylinder, or a winch, electric hoist or other structure. The operating width of the retractable scraper mechanism can be adjusted to adapt to different types of carriages. Specifically, the retractable scraper mechanism includes a fixed scraper assembly 1, a movable scraper assembly 2 and a drive assembly; the fixed scraper assembly 1 is fixedly arranged on the lifting frame, and the working width of the fixed scraper assembly 1 is the minimum working width of the retractable scraper mechanism; the drive assembly is transmission-connected to the movable scraper assembly 2, and is used to drive the movable scraper assembly 2 to move relative to the fixed scraper assembly 1, thereby increasing the working width of the retractable scraper mechanism and realizing adjustment of the working width of the retractable scraper mechanism to meet the width requirements of different types of carriages.

[0048] The above-mentioned retractable scraper mechanism drives the mobile scraper assembly 2 to move relative to the fixed scraper assembly 1 through the driving assembly to adjust the working width of the retractable scraper mechanism. Compared with the existing technology, a set of coal-leveling system can simultaneously meet the coal-leveling operations of different types of carriages, which can save space while reducing costs, and can also facilitate inspection and maintenance operations in subsequent applications, and has higher economic benefits.

[0049] The retractable scraper mechanism provided by the embodiment of the utility model is as follows: Figure 5 As shown, the fixed scraper assembly 1 is provided with a receiving space 13 ; the movable scraper assembly 2 is arranged in the receiving space 13 , and the driving assembly is used to drive the movable scraper assembly 2 to move in the width direction relative to the fixed scraper assembly 1 so as to extend out of or retract into the receiving space 13 .

[0050] In this embodiment, a receiving space 13 is provided in the fixed scraper assembly 1, and the above-mentioned moving scraper assembly 2 can be received in the receiving space 13, so as to protect the moving scraper assembly 2 when the moving scraper assembly 2 is not in use, and to prevent coal particles from getting stuck in the moving scraper assembly 2 and causing the moving scraper assembly 2 to jam during movement. Preferably, the above-mentioned driving assembly is also provided in the receiving space 13, so as to prevent coal particles from affecting the driving assembly.

[0051] In this embodiment, the movable scraper assembly 2 moves relative to the fixed scraper assembly 1 in the width direction, so that the overall height of the retractable scraper mechanism can be reduced, which facilitates the arrangement of the movable scraper assembly 2. When in use, the movable scraper assembly 2 extends from at least one end of the accommodating space 13 in the width direction or retracts into the accommodating space 13 under the action of the driving assembly. Figure 4 It has been shown in Figure 4 The direction perpendicular to the paper plane is the front-to-back direction.

[0052] Optionally, the retractable scraper mechanism provided in this embodiment is as follows: Figures 1 to 5 As shown, the fixed scraper assembly 1 includes a front scraper 11 and a rear scraper 12 ; the front scraper 11 and the rear scraper 12 are arranged at an interval, and a receiving space 13 is formed between the front scraper 11 and the rear scraper 12 .

[0053] In this embodiment, the fixed scraper assembly 1 includes a front scraper 11 and a rear scraper 12, and the front scraper 11 and the rear scraper 12 are arranged at intervals along the front-to-back direction; the front scraper 11 and the rear scraper 12 cooperate to achieve multi-level leveling, which can improve the efficiency and uniformity of leveling. The above-mentioned accommodating space 13 is arranged between the front scraper 11 and the rear scraper 12, which can maximize the use of the internal space of the retractable scraper mechanism, reduce the space occupied by the retractable scraper mechanism, and facilitate the arrangement of the movable scraper assembly 2 without affecting the operation of the fixed scraper assembly 1, and the equipment has a strong integrity.

[0054] In this embodiment, since the accommodating space 13 is located between the front scraper 11 and the rear scraper 12 , both ends of the accommodating space 13 in the width direction are open, so that the movable scraper assembly 2 can extend from or retract into the accommodating space 13 from both ends in the width direction of the accommodating space 13 .

[0055] Optionally, in the present embodiment, the above-mentioned accommodation space 13 can also be formed by providing a hollow box on the retractable scraper mechanism, which can also achieve the purpose of accommodating the movable scraper assembly 2 and the driving assembly in the present embodiment.

[0056] The retractable scraper mechanism provided by the embodiment of the utility model is as follows: Figures 1 to 3As shown, the movable scraper assembly 2 includes two movable scrapers 21; the two movable scrapers 21 are both connected to the driving assembly in transmission; the driving assembly drives the two movable scrapers 21 to move in opposite directions so that the two movable scrapers 21 extend out of the accommodating space 13 from both ends of the accommodating space 13, or the driving assembly drives the two movable scrapers 21 to move toward each other so that the two movable scrapers 21 retract into the accommodating space 13 from both ends of the accommodating space 13.

[0057] In this embodiment, the above-mentioned mobile scraper assembly 2 includes two mobile scrapers 21, and the two mobile scrapers 21 are both connected to the driving assembly in a transmission manner. The driving assembly simultaneously drives the two mobile scrapers 21 to move in the width direction relative to the fixed scraper assembly 1, and the two mobile scraper assemblies 2 move toward or away from each other during movement, that is, the mobile scrapers 21 are extended or retracted at both ends of the width direction of the accommodating space 13. By setting two mobile scrapers 21, the adjustment efficiency can be improved. At the same time, compared with setting one mobile scraper 21, when two mobile scrapers 21 are set at the same working width, the width dimension of the mobile scraper 21 is lower, so that the structural strength is higher, and damage during flat coal operation is avoided.

[0058] In this embodiment, the working width of the fixed scraper assembly 1 is set to L1, and the working width of the mobile scraper 21 is set to L2. At this time, the working width adjustment range L of the retractable scraper mechanism is L1≤L≤L1+2*L2. The above is the working width range of the retractable scraper mechanism when the mobile scraper 21 moves along the width direction of the fixed scraper assembly 1. When the mobile scraper 21 moves along the height direction of the retractable scraper mechanism, the working width range L of the retractable scraper mechanism is L1 and L1+2*L2, or L1 and L1+L2. The former is that the mobile scraper assembly 2 is only provided with one mobile scraper 21, and the latter is that the mobile scraper assembly 2 is provided with two mobile scrapers 21. When the mobile scraper 21 moves along the height direction of the retractable scraper mechanism, the mobile scraper 21 can be driven to move by a retractable cylinder such as an air cylinder or an oil cylinder, or the mobile scraper 21 can be driven to move by the gear 32 and the rack 33. At the same time, a limit track and other structures can be set on the frame of the retractable scraper mechanism to limit the mobile scraper 21. The mobile scraper 21 and the retractable cylinder are both arranged on the equipment frame 5.

[0059] The retractable scraper mechanism provided by the embodiment of the utility model is as follows: Figures 1 to 7 As shown, the driving assembly includes a driving motor 31, a gear 32 and a rack 33 corresponding to the moving scraper 21; the two racks 33 are slidably arranged in the accommodating space 13 and are connected to the corresponding moving scraper 21; the gear 32 is arranged at the output end of the driving motor 31, and the driving motor 31 drives the gear 32 to rotate; the two racks 33 are meshed with the gear 32, and the tooth surfaces of the two racks 33 are arranged opposite to each other.

[0060] In this embodiment, the driving assembly includes a driving motor 31, a gear 32 and a rack 33. As mentioned above, two mobile scrapers 21 are provided. Accordingly, two racks 33 are also provided in this embodiment, and the two racks 33 correspond to the two mobile scrapers 21. The mobile scrapers 21 are fixed on the corresponding racks 33. The fixed scraper assembly 1 also includes an equipment frame 5, which is used to be connected to the lifting frame. The front scraper 11 and the rear scraper 12 are both fixed on the equipment frame 5. The driving motor 31 is also fixed on the equipment frame 5, and at least the output shaft of the driving motor 31 is located in the accommodating space 13. The gear 32 is provided on the output shaft of the driving motor 31. The two racks 33 are both meshed with the gear 32, and the tooth surfaces of the two racks 33 are arranged opposite to each other. The rotation of the driving motor 31 can drive the two racks 33 to move toward or away from each other, thereby achieving the purpose of the driving assembly driving the two mobile scrapers 21 to move toward or away from each other. The driving motor 31 cooperates with the gear 32 and the rack 33, which has a simple structure, low cost and high reliability. At the same time, it can also drive the two moving scrapers 21 to move synchronously, and has high adjustment efficiency.

[0061] It can be understood that in this embodiment, the driving assembly can also use a telescopic cylinder such as an air cylinder, an oil cylinder or an electric cylinder, and each movable scraper is provided with a corresponding telescopic cylinder, and the telescopic cylinder can also achieve the purpose of driving the movable scraper 21 to move along the width direction of the fixed scraper assembly 1 in this embodiment. Moreover, the telescopic cylinders of the two movable scrapers 21 can be controlled synchronously or individually, which can be set according to the actual use situation.

[0062] The retractable scraper mechanism provided by the embodiment of the utility model is as follows: Figure 5 and Figure 7 As shown, it also includes a guide assembly, which is arranged in the accommodating space 13; the guide assembly is used to limit the rack 33, and / or the guide assembly is used to limit the movable scraper 21.

[0063] In this embodiment, in order to ensure the stability of the moving scraper 21 during movement, the retractable scraper mechanism is also provided with a guide assembly, which is used to limit at least one of the rack 33 and the moving scraper 21. In this embodiment, the guide assembly is preferably used to limit the rack 33 and the moving scraper 21 at the same time to improve the stability of the moving scraper 21 during movement.

[0064] Optionally, the retractable scraper mechanism provided in this embodiment is as follows: Figure 5 and Figure 7 As shown, the guide assembly includes a guide slide 41 corresponding to the rack 33; the guide slide 41 is fixed in the accommodating space 13 and extends along the width direction of the fixed scraper assembly 1, and the rack 33 is slidably arranged in the corresponding guide slide 41.

[0065] In this embodiment, the guide slide 41 is used to limit the rack 33. The rack 33 is slidably arranged in the guide slide 41. The guide slide 41 is located in the accommodating space 13 and is fixedly connected to the above-mentioned equipment frame 5. The guide slide 41 extends along the width direction of the fixed scraper assembly 1. By providing the guide slide 41 to limit the rack 33, the stability of the rack 33 when sliding in the accommodating space 13 can be ensured, and the failure of the retractable scraper mechanism caused by the heavy load on the mobile scraper 21 can be avoided during the coal leveling operation.

[0066] In this embodiment, the guide slide 41 can be a U-shaped structure, which can cover the three sides of the rack 33 where no teeth are set; but since the rack 33 also needs to be connected to the movable scraper 21, in order to increase the connection area between the rack 33 and the movable scraper 21, thereby increasing the connection strength between the rack 33 and the scraper, the guide slide 41 in this embodiment is preferably an L-shaped structure, which cooperates with the top of the rack 33 and the side away from the teeth to limit the rack 33, and the bottom of the rack 33 is connected to the movable scraper 21.

[0067] Optionally, the retractable scraper mechanism provided in this embodiment is as follows: Figure 5 and Figure 7 As shown, the guide assembly includes a first guide rail 43 and a first guide wheel group 42 corresponding to the rack 33; the first guide wheel group 42 is arranged on the corresponding rack 33; the first guide rail 43 is fixed in the accommodating space 13 and extends along the width direction of the fixed scraper assembly 1, and the first guide wheel group 42 is slidably connected to the first guide rail 43.

[0068] In this embodiment, the guide assembly includes a first guide rail 43 and a first guide wheel group 42. The first guide wheel group 42 is connected to the corresponding rack 33. The upper end of the first guide wheel group 42 is connected to the bottom of the rack 33 to avoid affecting the coordination between the rack 33 and the guide slide 41. The lower end of the first guide wheel group 42 is connected to the movable scraper 21. The first guide wheel group 42 is slidably connected to the first guide rail 43. Through the coordination between the first guide wheel group 42 and the first guide rail 43, the stability of the rack 33 when sliding in the accommodating space 13 can be ensured, and the failure of the retractable scraper mechanism due to the large load on the movable scraper 21 can be avoided during the coal leveling operation.

[0069] In this embodiment, the first guide rail 43 is preferably an H-shaped steel, so that the first guide rail 43 has two grooves arranged opposite to each other. The first guide rail 43 is located in the accommodating space 13, and the upper end surface of the first guide rail 43 is fixedly connected to the equipment frame 5. The first guide wheel group 42 includes a first wheel frame and a plurality of first guide wheels 421. The first guide wheels 421 are arranged in two rows along the height direction of the first wheel frame, and each row has a plurality of first guide wheels 421. The first guide wheels 421 of each row are arranged along the width direction of the first wheel frame, and all the first guide wheels 421 are rotatably arranged on the first wheel frame. One row of the first guide wheels 421 is located in the above-mentioned groove, and the other row of the first guide wheels 421 cooperates with the lower end surface of the first guide rail 43.

[0070] In this embodiment, since two racks 33 are provided, two sets of first guide wheel groups 42 directly connected to the racks 33 can share one first guide rail 43, thereby reducing costs and facilitating layout. Preferably, in this embodiment, in order to further improve the stability of the rack 33, two sets of first guide wheel groups 42 are provided corresponding to each rack 33, one set of first guide wheel groups 42 is directly connected to the rack 33, and the other set of first guide wheel groups 42 is connected to the moving scraper 21, and the two sets of guide wheel groups are arranged oppositely and both cooperate with the first guide rail 43. By limiting the rack 33 with two sets of first guide wheel groups 42, the stability of the rack 33 can be greatly improved.

[0071] It can be understood that in this embodiment, the first guide rail 43 can also be a steel section such as a channel steel or an angle steel; when the first guide rail 43 is a channel steel or an angle steel, although it can also achieve the purpose of limiting the rack 33 in cooperation with the first guide wheel group 42 in this embodiment, each group of first guide wheel groups 42 must be separately configured with a first guide rail 43.

[0072] Optionally, the retractable scraper mechanism provided in this embodiment is as follows: Figure 5 and Figure 7 As shown, the guide assembly includes a second guide rail 45 and a second guide wheel group 44 corresponding to the movable scraper 21; the second guide wheel group 44 is arranged on the corresponding movable scraper 21; the second guide rail 45 is fixed in the accommodating space 13 and extends along the width direction of the fixed scraper assembly 1, and the second guide wheel group 44 is slidably connected to the second guide rail 45.

[0073] In this embodiment, the second guide rail 45 cooperates with the second guide wheel group 44 to guide and limit the movable scraper 21, thereby ensuring the stability of the movable scraper 21 when sliding in the accommodation space 13, and avoiding the failure of the retractable scraper mechanism due to the large load on the movable scraper 21 during the coal leveling operation. The second guide wheel group 44 includes a second wheel frame and a plurality of second guide wheels 441, which are rotatably arranged on the second wheel frame and arranged along the width direction of the second wheel frame. The second guide wheel group 44 is provided on both sides of the movable scraper 21 in the front and rear directions. The second guide rail 45 is a long strip structure, which is correspondingly arranged on the second guide wheel group 44 and fixedly arranged on the front scraper 11 and the rear scraper 12, specifically on the side of the front scraper 11 opposite to the rear scraper 12 and the side of the rear scraper 12 opposite to the front scraper 11. The second guide wheel group 44 on the same side of the two movable scrapers 21 also shares the same second guide rail 45 to reduce costs and facilitate layout.

[0074] The retractable scraper mechanism provided in this embodiment has a guide assembly that uses a guide slide 41, a first guide wheel group 42 and a first guide rail 43 to guide and limit the rack 33, and uses a second guide rail 45 and a second guide wheel group 44 to limit the movable scraper 21. It has strong stability and can withstand higher loads.

[0075] The above content mentioned that both ends of the accommodating space 13 in the width direction are open. In order to prevent the first guide wheel group 42 and the second guide wheel group 44 from derailing, removable sealing plates are required to be provided at both ends of the accommodating space 13 in the width direction for sealing.

[0076] Another embodiment of the utility model further provides a coal leveling system, comprising the retractable scraper mechanism described in any of the above embodiments.

[0077] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0078] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A retractable scraper mechanism, characterized in that: The retractable scraper mechanism is used in a coal-leveling system, which includes a gantry frame, a lifting frame and a driving unit; the lifting frame is slidably arranged on the gantry frame, and the driving unit is used to drive the lifting frame to slide on the gantry frame; The retractable scraper mechanism is arranged on the lifting frame, and comprises: a fixed scraper assembly (1), a movable scraper assembly (2) and a driving assembly; The movable scraper assembly (2) is in transmission connection with the driving assembly, and the driving assembly is used to drive the movable scraper assembly (2) to move relative to the fixed scraper assembly (1) so as to adjust the working width of the retractable scraper mechanism.

2. The retractable scraper mechanism according to claim 1, characterized in that: The fixed scraper assembly (1) is provided with a receiving space (13); The movable scraper assembly (2) is arranged in the accommodating space (13), and the driving assembly is used to drive the movable scraper assembly (2) to move in a width direction relative to the fixed scraper assembly (1) so as to extend out of or retract into the accommodating space (13).

3. The retractable scraper mechanism according to claim 2, characterized in that: The fixed scraper assembly (1) comprises a front scraper (11) and a rear scraper (12); The front scraper (11) and the rear scraper (12) are arranged at an interval, and the accommodation space (13) is formed between the front scraper (11) and the rear scraper (12).

4. The retractable scraper mechanism according to claim 2, characterized in that: The movable scraper assembly (2) comprises two movable scrapers (21); The two movable scrapers (21) are both in transmission connection with the driving assembly; The driving component drives the two movable scrapers (21) to move in opposite directions so that the two movable scrapers (21) extend out of the accommodation space (13) from both ends of the accommodation space (13), or the driving component drives the two movable scrapers (21) to move toward each other so that the two movable scrapers (21) retract into the accommodation space (13) from both ends of the accommodation space (13).

5. The retractable scraper mechanism according to claim 4, characterized in that: The driving assembly comprises a driving motor (31), a gear (32), and a rack (33) arranged corresponding to the moving scraper (21); The two racks (33) are both slidably disposed in the accommodating space (13) and are connected to the corresponding moving scrapers (21); The gear (32) is arranged at the output end of the drive motor (31), and the drive motor (31) drives the gear (32) to rotate; the two racks (33) are both meshed with the gear (32), and the tooth surfaces of the two racks (33) are arranged opposite to each other.

6. The retractable scraper mechanism according to claim 5, characterized in that: It also includes a guide assembly, which is arranged in the accommodating space (13); the guide assembly is used to limit the position of the rack (33), and / or the guide assembly is used to limit the position of the movable scraper (21).

7. The retractable scraper mechanism according to claim 6, characterized in that: The guide assembly comprises a guide slideway (41) arranged corresponding to the rack (33); The guide slideway (41) is fixedly arranged in the accommodating space (13) and extends along the width direction of the fixed scraper assembly (1); the rack (33) is slidably arranged in the corresponding guide slideway (41).

8. The retractable scraper mechanism according to claim 6, characterized in that: The guide assembly comprises a first guide rail (43) and a first guide wheel set (42) corresponding to the rack (33); The first guide wheel set (42) is arranged on the corresponding rack (33); The first guide rail (43) is fixedly arranged in the accommodating space (13) and extends along the width direction of the fixed scraper assembly (1); the first guide wheel assembly (42) is slidably connected to the first guide rail (43).

9. The retractable scraper mechanism according to claim 6, characterized in that: The guide assembly comprises a second guide rail (45) and a second guide wheel set (44) corresponding to the movable scraper (21); The second guide wheel set (44) is arranged on the corresponding moving scraper (21); The second guide rail (45) is fixedly arranged in the accommodating space (13) and extends along the width direction of the fixed scraper assembly (1); the second guide wheel assembly (44) is slidably connected to the second guide rail (45).

10. A coal leveling system, characterized in that: It comprises a retractable scraper mechanism as claimed in any one of claims 1 to 9.

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