Scraper blade, garbage pressing and filling mechanism and garbage truck

Abstract

According to the scraping plate, the garbage pressing and filling mechanism and the garbage truck, the surface, used for making contact with garbage, of the scraping plate is transformed into at least two contact surfaces which are sequentially connected in an included angle mode, and the included angle is specifically designed; in this way, in the extending process of the telescopic driving piece, the pressing and filling force of one contact face to garbage can coincide with the ideal horizontal pressing and filling direction, the maximum rotating angle needed by the scraper to rotate to the scraping position can be decreased, and therefore the telescopic stroke of the telescopic driving piece can be shortened on the premise that the pressing and filling effect is achieved; the length of a force arm driven by the telescopic driving part is increased, and the force application area on the garbage can be increased by pressing and filling the garbage through the main contact surface, so that the back pressure is reduced, meanwhile, the maximum rotation angle of opening of the scraper blade is increased, and the opening degree of the feed port is increased.

Description

Technical Field

[0001] This application relates to the field of sanitation equipment technology, and in particular to a scraper, a garbage compaction mechanism, and a garbage truck. Background Technology

[0002] Garbage trucks, also known as waste collection trucks or waste collection vehicles, are vehicles specifically designed for collecting and transporting solid waste in urban and rural areas. These vehicles are essential for maintaining environmental cleanliness and public health.

[0003] As one of the core components of a garbage truck, the garbage compaction mechanism uses a hydraulically driven scraper to open and close the garbage bin inlet, and uses mechanical force to compact the garbage inside the garbage bin, reducing the volume of garbage, making more efficient use of the space inside the garbage bin, and increasing the garbage loading capacity.

[0004] The inventors discovered that current waste compaction mechanisms typically employ a large arc design for the scraper. When the scraper is compacting, on the one hand, the upward opening angle of the scraper is small, causing it to be positioned below the waste bin's feed inlet when the waste bin is being emptied, affecting waste disposal and easily leading to waste accumulation, blockage, and spillage at the feed inlet; on the other hand, the large reaction force from the waste on the scraper causes the back pressure on the hydraulic system to far exceed the system pressure, making pipelines and structural components prone to damage. Utility Model Content

[0005] The purpose of this application is to provide a scraper, a garbage compaction mechanism, and a garbage truck that reduces back pressure and increases the opening of the feed inlet.

[0006] The embodiments of this application can be implemented as follows:

[0007] In a first aspect, this utility model provides a scraper for a garbage truck, the scraper having a first hinge point and a second hinge point, the first hinge point being used to hinge with a sliding plate, and the second hinge point being used to hinge with a telescopic drive component.

[0008] The scraper has at least two contact surfaces that are connected in sequence, and the two adjacent contact surfaces are at an angle to each other.

[0009] There is a main contact surface among the contact surfaces, and the area of ​​the main contact surface is larger than the area of ​​the other contact surfaces.

[0010] In an optional embodiment, a transition surface is provided between the main contact surface and the first hinge point, and the included angle between the main contact surface and the transition surface is greater than or equal to 90°.

[0011] In an optional implementation, the main contact surface is a plane or a curved surface.

[0012] In an optional embodiment, the transition surface is a plane or a curved surface, and the vertical distance between the intersection of the transition surface and the main contact surface and the first hinge point is H1, the vertical distance between the end of the main contact surface away from the first hinge point and the first hinge point is H2, and H1 is less than 1 / 2 of H2.

[0013] In an optional embodiment, the vertical distance between the intersection of the transition surface and the main contact surface and the second hinge point is H3, and the vertical distance between the end of the main contact surface away from the second hinge point and the second hinge point is H4, where H3 is less than 1 / 2 of H4.

[0014] In an optional embodiment, an arcuate surface is connected to the side of the main contact surface away from the first hinge point, and the arcuate surface is tangent to the main contact surface.

[0015] Secondly, this utility model provides a waste compaction mechanism, including a telescopic drive component, a sliding plate, and a scraper as described in any of the foregoing embodiments;

[0016] The first hinge point is hinged to the slide plate;

[0017] The telescopic drive member is hinged between the slide plate and the second hinge point, and the telescopic drive member is used to drive the scraper to rotate relative to the slide plate.

[0018] In an optional embodiment, the telescopic drive includes a hydraulic cylinder and a power transmission assembly;

[0019] One end of the hydraulic cylinder is hinged to the slide plate, and the other end is hinged to the power transmission assembly;

[0020] The power transmission component is hinged to the second hinge point.

[0021] In an optional embodiment, the power transmission assembly includes a linkage assembly, the linkage assembly including a hinged first linkage and a second linkage;

[0022] One end of the first connecting rod is hinged to the sliding plate;

[0023] One end of the second connecting rod is hinged to the second hinge point.

[0024] Thirdly, this utility model provides a garbage truck, including the garbage compaction mechanism described in any of the foregoing embodiments.

[0025] Compared with the prior art, the beneficial effects of the embodiments of this application include, for example:

[0026] By modifying the scraper's contact surface with the waste to connect at least two contact surfaces in sequence, and by specifically designing the angle between adjacent contact surfaces, if the original telescopic drive's extension stroke remains unchanged, then during the extension of the telescopic drive, one contact surface will have a compaction force on the waste that coincides with the ideal horizontal compaction direction. The maximum angle required for the scraper to rotate to the desired scraping position can be reduced, that is, the lowest point of the second hinge point rotating clockwise around the first hinge point is raised. Therefore, the extension stroke of the telescopic drive can be shortened while satisfying the compaction effect, and the lever arm length of the telescopic drive can be increased. Moreover, compacting the waste through the main contact surface can increase the force application area on the waste, thereby reducing back pressure, while increasing the maximum rotation angle of the scraper opening, and thus increasing the opening of the feed inlet. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of a waste compaction mechanism in the prior art when the scraper is in the scraping position;

[0029] Figure 2 This is a schematic diagram of a waste compaction mechanism in the prior art when the scraper is in the open position;

[0030] Figure 3 This is a schematic diagram of the scraping area of ​​a scraper in the prior art;

[0031] Figure 4 for Figures 1 to 3 A schematic diagram of the middle scraper;

[0032] Figure 5 This is a schematic diagram of the waste compaction mechanism in one embodiment of this application when the scraper is in the scraping position;

[0033] Figure 6 This is a schematic diagram of the waste compaction mechanism in one embodiment of this application when the scraper is in the open position;

[0034] Figure 7 This is a schematic diagram of the scraping area of ​​the scraper in one embodiment of this application;

[0035] Figure 8 for Figures 5 to 6 A schematic diagram of the middle scraper;

[0036] Figure 9for Figure 4 A comparative diagram of the middle scraper and the 8th scraper;

[0037] Figure 10 This is a schematic diagram of the waste compaction mechanism in another embodiment of this application when the scraper is in the scraping position;

[0038] Figure 11 This is a schematic diagram of the waste compaction mechanism in another embodiment of this application when the scraper is in the open position.

[0039] Icons: 100-Scraper; 101-Contact arc surface; 103-Main contact surface; 105-Transition surface; 107-Curved surface; 120-Slide plate; 140-Hydraulic cylinder; 160-Power transmission assembly; 161-First link; 163-Second link; 200-Trash can; 300-Trash bin; O1-First hinge point; O2-Second hinge point; O3-Third hinge point. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0043] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0044] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0045] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" 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 application based on the specific circumstances.

[0046] like Figures 1 to 3 As shown, the existing waste compaction mechanism includes a sliding plate 120, a scraper 100, and a hydraulic cylinder 140. The scraper 100 is hinged to the sliding plate 120 at hinge point O1. A hydraulic cylinder 140 is hinged between the sliding plate 120 and the scraper 100 as a power source to drive the scraper 100 to rotate relative to the sliding plate 120. The hinge point between the hydraulic cylinder 140 and the scraper 100 is O2, and the hinge point between the hydraulic cylinder 140 and the sliding plate 120 is O3. When the hydraulic cylinder 140 extends or retracts, the scraper 100 rotates around the hinge point O1, forming the opening and closing action of the scraper 100 and the compaction action.

[0047] However, existing waste compaction mechanisms have the following drawbacks:

[0048] 1. Due to the stroke limitation of the hydraulic cylinder 140 driving the scraper 100, the upward opening angle of the scraper 100 is not large enough to meet the requirement of horizontal compaction force. Because the opening angle of the feed inlet is relatively small, when encountering a large garbage bin 300 for unloading, the scraper 100 will be positioned below the unloading port of the garbage bin 300. The insufficient space in the feeding hopper easily leads to garbage accumulation and blockage. Garbage accumulating above the scraper 100 easily causes garbage spillage.

[0049] 2. When the existing slide plate 120 drives the scraper 100 for compaction, due to the limitations of the mechanism layout, the back pressure on the scraper 100 driving cylinder 140 and pipelines will far exceed the system pressure, increasing the risk of damage to pipelines and structural components. Because the back pressure far exceeds the system pressure, it will be more difficult to adjust the back pressure valve setting value.

[0050] The inventor discovered the cause of the above defects only after continuous research and experimentation: the surface of the scraper 100 that comes into contact with the waste in the existing technology uses a method such as... Figures 1 to 3The arc surface design shown is used to press and fill the waste by contacting the arc surface 101.

[0051] Furthermore, the waste compaction mechanism needs to meet the following functions:

[0052] 1. During compaction, the maximum compaction force should be output to compact the waste as much as possible. To ensure 100% utilization of the compaction force of the sliding plate 120, the force-bearing surface of the scraper 100 must be kept perpendicular to the force direction of the sliding plate 120 (see...). Figure 1 ).

[0053] Second, when the slide plate 120 drives the scraper 100 to compact, the back pressure on the scraper 100 should be as small as possible under the same force of the slide plate 120 to ensure the safety of the structural components and hydraulic components.

[0054] Third, during scraping, it should ensure that as much loose debris as possible is scraped away, and the scraping area should be as large as possible, while maintaining a small gap between the scraper 100 and the inclined plate of the garbage bin 200 during the movement of the scraper (see...). Figure 2 ).

[0055] 4. When feeding materials in the compaction state, the scraper 100 should be opened as much as possible to increase the space for waste to fall while ensuring that it does not interfere with the feeding action of the waste bin 300.

[0056] Therefore, refer to Figure 4 If the stroke of the hydraulic cylinder 140 is insufficient, then when the hydraulic cylinder 140 extends to its maximum extent, the scraper 100 cannot reach the ideal scraping position. The compaction force Fb on the waste and the compaction direction Fa have an angle α, and the lever arm is AO1. Therefore, if it is necessary to make the scraper 100 reach the required scraping position and make Fa and Fb coincide while keeping O1 and O2 in their original positions, it is necessary to increase the stroke of the hydraulic cylinder 140 so that point O2 can continue to rotate clockwise by an angle α.

[0057] However, before the stroke of the hydraulic cylinder 140 is changed, after the scraper 100 of the hydraulic cylinder 140 rotates downward to the maximum angle, the compaction force of the scraper 100 on the garbage is actually the component of Fb in the F direction. The reaction force F1 of the garbage on the scraper 100 is in the opposite direction of F. Therefore, after increasing the stroke of the hydraulic cylinder 140, in order to increase the component of force in the F direction, a larger hydraulic pressure is needed to drive the scraper 100 to rotate in order to make Fb coincide with F. Moreover, during this process, point O2 will move downward, which will cause the length of the driving arm AO1 of the hydraulic cylinder 140 to become shorter. As a result, the back pressure on the hydraulic cylinder 140 and the corresponding pipeline system will be large, which will easily cause the back pressure to far exceed the system pressure.

[0058] Furthermore, since the stroke of the hydraulic cylinder 140 depends on the length of the cylinder body, increasing the stroke of the hydraulic cylinder 140 will lead to an increase in the length of the cylinder body. Therefore, when the hydraulic cylinder 140 is shortened to its minimum length, the maximum rotation angle of the scraper 100 when it rotates counterclockwise to the open position (i.e., the highest point of the counterclockwise rotation of point O2 around point O1) will decrease by angle α, and the feed inlet will correspondingly become smaller. Thus, although the existing scraper 100 structure can achieve the compaction effect by increasing the stroke of the hydraulic cylinder 140, increasing the stroke cannot meet the feed inlet opening requirements. Conversely, shortening the stroke of the hydraulic cylinder 140 can meet the feed inlet opening requirements, but the compaction effect cannot be guaranteed.

[0059] Therefore, in the prior art, the opening angle of the scraper 100 and the horizontal direction of compaction cannot be satisfied simultaneously.

[0060] However, after discovering the above-mentioned reasons, the inventors of this application proposed a scraper 100 and a garbage compaction mechanism and garbage truck having the scraper 100. By modifying the shape of the scraper 100, the driving arm of the hydraulic cylinder 140 is increased while keeping the O1 and O2 points unchanged, so as to increase the opening angle of the scraper 100 and reduce the back pressure while ensuring the compaction effect.

[0061] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0062] refer to Figures 5 to 8 This application discloses a waste compaction mechanism, including a telescopic drive component, a sliding plate 120, and a scraper 100;

[0063] The scraper 100 has a first hinge point O1 and a second hinge point O2. The first hinge point O1 is used to hinge with the slide plate 120, and the second hinge point O2 is used to hinge with the telescopic drive member. That is, the first hinge point O1 is hinged to the slide plate 120. The telescopic drive member is hinged between the drive assembly and the second hinge point O2. The telescopic drive member includes a hydraulic cylinder 140, which is mainly used to drive the scraper 100 to rotate relative to the slide plate 120.

[0064] The scraper 100 has at least two contact surfaces that are connected in sequence, with an angle between adjacent contact surfaces.

[0065] In this way, by modifying the scraper 100 to contact at least two contact surfaces in sequence, since there is an angle between the two adjacent contact surfaces, by specifically designing the angle, if the original stroke of the hydraulic cylinder 140 remains unchanged, then during the extension of the hydraulic cylinder 140, the compaction force of one contact surface on the garbage will coincide with the ideal horizontal compaction direction. The maximum angle required for the scraper 100 to rotate to the required scraping position can be reduced, that is, the second hinge point O2 rises from the lowest point of the clockwise rotation around the first hinge point O1. Therefore, the stroke of the hydraulic cylinder 140 can be shortened while satisfying the compaction effect, the length of the lever arm driven by the hydraulic cylinder 140 can be increased, the back pressure can be reduced, and the maximum rotation angle of the scraper 100 opening can be increased, thereby increasing the opening of the feed inlet.

[0066] In detail, in this embodiment, the included angle between two adjacent contact surfaces is an obtuse angle, which is convenient for manufacturing and can also increase the number of contact surfaces while keeping the overall volume of the scraper 100 unchanged. This is more conducive to shortening the stroke of the hydraulic cylinder 140, so as to further increase the maximum angle of the scraper 100 to rotate upward while meeting the compaction force requirements.

[0067] Optionally, one of the contact surfaces is a main contact surface 103, the area of ​​which is larger than the areas of the other contact surfaces. The main contact surface 103 is planar, thus using this main contact surface 103 to compact the waste, increasing the area of ​​force application on the waste, thereby further reducing back pressure. Of course, in some embodiments, the main contact surface 103 can also be a curved surface, as long as it can ensure that the area and direction of force application are maintained in a manner substantially the same as that of a planar surface.

[0068] There is at least one contact surface between the first hinge point O1 and the main contact surface 103. These contact surfaces serve as transition surfaces 105, that is, there is a transition surface 105 between the first hinge point O1 and the main contact surface 103. The angle between the transition surface 105 and the main contact surface 103 is greater than or equal to 90°, that is, the angle is a right angle or an obtuse angle. The transition surface 105 can be a plane or an arc surface, so that the thickness between the free end of the scraper 100 and the first hinge point O1 gradually decreases, reducing local stress and thus ensuring the strength of the scraper 100. The free end of the scraper 100 is the end of the scraper 100 that is farthest from the first hinge point O1 and the second hinge point O2, that is, the lowest end after the scraper 100 rotates downward to the limit position of the scraping area.

[0069] In this embodiment, the vertical distance between the intersection of the transition surface 105 and the main contact surface 103 and the first hinge point O1 is H1, and the vertical distance between the end of the main contact surface 103 away from the first hinge point O1 and the first hinge point O1 is H2, where H1 is less than half of H2. The vertical distance between the intersection of the transition surface 105 and the main contact surface 103 and the second hinge point O2 is H3, and the vertical distance between the end of the main contact surface 103 away from the second hinge point O2 and the second hinge point O2 is H4, where H3 is less than half of H4. Both of these dimensional ratios ensure that the main contact surface 103 occupies a sufficiently large area on the entire scraper 100, thereby reducing the vertical distance between O1 and the main contact surface 103 while keeping the distance between O1 and O2 constant. This reduces the lever transmission arm from O2 to the main contact surface 103, increasing the output force of the main contact surface 103 under the same driving force, thus ensuring the compaction effect.

[0070] An arc-shaped surface 107 is connected to the side of the main contact surface 103 away from the first hinge point O1. The arc-shaped surface 107 is tangent to the main contact surface 103, which reduces local stress and thus improves the strength of the scraper 100.

[0071] Compared to the existing arc-shaped scraper 100, such as Figure 9 As shown, the force exerted by the main contact surface 103 on the waste is Fa. At this time, the scraper 100 is at an angle where Fa and the ideal horizontal F are in the same direction, which has the best compression effect on the waste. However, in the prior art, when the scraper 100 keeps the angle of the scraper 100 unchanged, the surface in contact with the waste is the contact arc surface 101. The force Fb exerted by the contact arc surface 101 on the waste is at an angle to Fa. Therefore, the compression effect of the planar main contact surface 103 on the waste is necessarily better than that of the contact arc surface 101 on the waste.

[0072] To achieve the same compaction effect as the main contact surface 103, the O2 point must rotate clockwise by an angle α around the O1 point so that Fb coincides with Fa. Therefore, the existing scraper 100 must use a hydraulic cylinder 140 with a larger stroke than the scraper 100 of this application. This results in a reduction of the maximum angle α when the O2 point rotates counterclockwise around the O1 point, making the highest position of the O2 point lower. Consequently, the opening angle of the scraper 100 becomes smaller, and the feed inlet also becomes smaller. Therefore, when the shape of the scraper 100 is changed from the entire contact arc surface 101 in the existing technology to the structure of at least two contact surfaces connected at an angle in this application, the line O1O2 connecting O1 and O2 and the normal of the main contact surface 103 can be made more consistent. The angle between them is increased by α compared to the angle between the contact arc surface 101 and the connecting line O1O2 in the prior art, thereby increasing the length of the driving arm AO1 of the hydraulic cylinder 140. In this embodiment, the angle of the scraper 100 rotating clockwise toward the scraping position is reduced by α compared to the existing scraper 100, and the angle of the scraper 100 rotating counterclockwise toward the opening position is increased by α. This can increase the opening of the feed inlet while ensuring the compaction effect, improve the problem of garbage spillage and interference between the scraper 100 and the garbage bin 300 when feeding, and reduce the back pressure of the scraper 100 hydraulic cylinder 140, pipeline and structural components during compaction, effectively controlling it within the tolerable range, greatly reducing the possibility of pipeline bursting and structural component damage, and reducing back pressure.

[0073] In addition, in some embodiments, it is also feasible for two adjacent contact surfaces to be at an acute angle or a right angle, as long as the angle between at least one contact surface and the connecting line O1O2 is increased compared to the angle between the normal of the contact arc surface 101 and the connecting line O1O2 in the prior art.

[0074] exist Figure 10 and Figure 11 In one embodiment shown, the telescopic drive component includes a hydraulic cylinder 140 and a power transmission assembly. One end of the hydraulic cylinder 140 is hinged to the slide plate 120, and the other end is hinged to the power transmission assembly. The power transmission assembly is hinged to the second hinge point O2. This increases the force and lever arm length of the hydraulic cylinder 140 on the scraper 100 via the power transmission assembly 160, allowing the hydraulic cylinder 140 to extend with less pressure, thereby reducing back pressure and increasing the angular range of the driven scraper 100, which in turn increases the feed inlet opening.

[0075] In detail, the power transmission assembly includes a linkage assembly, which includes a hinged first linkage 161 and a second linkage 163;

[0076] One end of the first connecting rod 161 is hinged to the slide plate 120 at a position close to the second hinge point O2 and far from the third hinge point O3, which is the hinge point between the hydraulic cylinder 140 and the slide plate 120. One end of the second connecting rod 163 is hinged to the second hinge point O2. In this way, the connecting rod assembly amplifies the force exerted by the hydraulic cylinder 140 on the scraper 100, increases the lever arm, and expands the opening of the feed inlet.

[0077] Of course, in some embodiments, the telescopic drive can also use an electric push rod or the like as the telescopic power source.

[0078] In addition, this application also discloses a garbage truck that includes the garbage compaction mechanism described in the above embodiments, and therefore also has the corresponding structure and beneficial effects, which will not be repeated here.

[0079] In summary, the embodiments of this application have at least the following advantages compared to the prior art:

[0080] 1. The scraper 100 is designed to deform the contact surface with the waste, and the scraping surface is moved back appropriately, but the compaction effect is maintained to achieve the required effect.

[0081] 2. Effectively moves the scraping area of ​​scraper 100 upward, effectively opens scraper 100, and improves the problem of garbage spillage caused by scraper 100 not being fully opened and the problem of interference between scraper 100 and garbage can 300 when the garbage can is being fed.

[0082] 3. Effectively increases the scraping force arm of scraper 100 and the resistance arm of slide plate 120 during compaction, thereby effectively increasing the compaction effect and reducing the back pressure of scraper 100 pipeline and reducing the strength requirements of structural components.

[0083] It should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A flight for a refuse vehicle, characterized in that The scraper (100) has a first hinge point position (O1) for being hinged with the sliding plate (120) and a second hinge point position (O2) for being hinged with the telescopic driving member; The surface of the scraper (100) for contacting the garbage is divided into at least two contact surfaces connected in sequence, and the adjacent two contact surfaces form an included angle. The main contact surface (103) has an area greater than that of other contact surfaces.

2. The flight as defined in claim 1, wherein, The main contact surface (103) and the transition surface (105) form an included angle greater than or equal to 90°.

3. The flight as claimed in claim 1 or 2, characterized in that The main contact surface (103) is a plane or a curved surface.

4. The flight as defined in claim 2 wherein, The transition surface (105) is a plane or a curved surface, and the perpendicular distance between the intersection line of the transition surface (105) and the main contact surface (103) and the first hinge point position (O1) is H1, and the perpendicular distance between the end of the main contact surface (103) away from the first hinge point position (O1) and the first hinge point position (O1) is H2, H1 is less than 1 / 2 of H2.

5. The flight as defined in claim 4, wherein, The perpendicular distance between the intersection line of the transition surface (105) and the main contact surface (103) and the second hinge point position (O2) is H3, and the perpendicular distance between the end of the main contact surface (103) away from the second hinge point position (O2) and the second hinge point position (O2) is H4, H3 is less than 1 / 2 of H4.

6. The flight as defined in claim 1, wherein, An arc-shaped surface (107) is connected to the side of the main contact surface (103) away from the first hinge point position (O1), and the arc-shaped surface (107) is tangent to the main contact surface (103).

7. A refuse compactor mechanism characterized by comprising: The telescopic driving member, the sliding plate (120) and the scraper (100) of any one of claims 1-6 are included. The first hinge point position (O1) is hinged to the sliding plate (120). The telescopic driving member is hinged between the sliding plate (120) and the second hinge point position (O2), and the telescopic driving member is used to drive the scraper (100) to rotate relative to the sliding plate (120).

8. The trash packing mechanism of claim 7, wherein, The telescopic driving member includes a hydraulic cylinder (140) and a power transmission assembly. One end of the hydraulic cylinder (140) is hinged to the sliding plate (120), and the other end is hinged to the power transmission assembly. The power transmission assembly is hinged to the second hinge point position (O2).

9. The trash packing mechanism of claim 8, wherein, The power transmission assembly includes a linkage assembly, and the linkage assembly includes hinged first and second linkages (161, 163). One end of the first linkage (161) is hinged to the sliding plate (120). One end of the second linkage (163) is hinged to the second hinge point position (O2).

10. A refuse vehicle characterised in that, The garbage compaction mechanism of any one of claims 7-9 is included.

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