Star wheel and sintering machine system

Abstract

The invention provides a star wheel and a sintering machine system. The star wheel comprises a wheel body. The rotary connecting piece is connected with the wheel main body and drives the wheel main body to rotate; the supporting frame body is located on the supporting bottom face, and the supporting frame body supports the wheel body through a rotary connecting piece; the lifting piece is connected with the rotary connecting piece, and the lifting piece drives the wheel main body to be close to or away from the supporting bottom surface through the rotary connecting piece. Through the arrangement of the lifting piece, the wheel body can be far away from or close to the supporting bottom face, and lifting of the wheel body can be achieved. Thus, the meshing position of the star wheel and the sintering machine trolley can be changed, the upward friction force of the wheel body on the sintering machine trolley is reduced, and the arching phenomenon is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of sintering machines, and in particular to a star wheel and a sintering machine system. Background Art

[0002] As one of the most critical equipment in the sintering ore production process, the working condition of the sintering machine will greatly affect the efficiency of the sintering ore production process.

[0003] At present, the sintering machine commonly used in steel plants is the tail mobile sintering machine. When the return trolley is pushed by the sprocket plate and returns along the tail curved track, most of them have different degrees of arching phenomenon, that is, the wheels of the sintering machine trolley are lifted up and cannot contact the lower track of the return track. The arching phenomenon of the sintering machine trolley has a very obvious impact on production and equipment, which is easy to damage equipment, cause air leakage, affect the output and quality of sintered ore, and even cause production suspension.

[0004] In order to deal with the arching phenomenon of the sintering machine trolley, some treatment solutions will add a pressure rail to press down the already arched sintering machine trolley, but the warping force on the sintering machine trolley is large, and it is difficult to press down the pressure rail, resulting in poor effect of pressing down the sintering machine trolley. Some treatment solutions will add a sloped track to make the sintering machine trolley climb up for a while and then return to the horizontal track along the downhill track. In the process of going up and down the slope, the adjacent sintering machine trolleys are separated at the top of the slope, so that the sintering machine trolley returns to the horizontal track along the sloped track. However, with this setting, when the sintering machine is shut down, the sintering machine trolley will not be able to automatically reset and press against each other during the process of cooling from hot state, resulting in the phenomenon of sintering machine trolley pulling seams. Summary of the invention

[0005] In order to at least partially solve the problems existing in the prior art, according to one aspect of the present invention, there is provided a star wheel, which is used to drive the sintering machine trolley to move, and the star wheel comprises: a wheel body; a rotating connection member, which is connected to the wheel body and drives the wheel body to rotate; a support frame, which is located on the support bottom surface and supports the wheel body through the rotating connection member; and a lifting member, which is connected to the rotating connection member and drives the wheel body to approach or move away from the support bottom surface through the rotating connection member.

[0006] The star wheel provided in the present application can move the wheel body away from or close to the supporting bottom surface by setting the lifting member, that is, the wheel body can be lifted. In this way, the meshing position between the star wheel and the sintering machine trolley can be changed, the upward friction of the wheel body on the sintering machine trolley can be reduced, and the occurrence of arching can be avoided.

[0007] Exemplarily, the rotating connection member includes a bearing seat, the bearing seat includes a fixed seat and a rotating ring rotatable relative to the fixed seat, the rotating ring is connected to the wheel body and rotates together with the wheel body, the fixed seat is connected to the lifting member and under the action of the lifting member, drives the rotating ring and the wheel body to approach or move away from the supporting bottom surface.

[0008] Exemplarily, the rotating connector also includes a connecting pad, which is connected to the bottom surface of the fixing seat, and the lifting member is connected to a side of the connecting pad facing away from the fixing seat.

[0009] Exemplarily, a limit member is provided on the support frame, the limit member is extended in a direction away from the support bottom surface, a limit notch matching with the limit member is provided on the connecting pad, and the limit member is snapped into the limit notch.

[0010] Exemplarily, there are at least two limiting notches which are respectively located on different sides of the connecting pad, and the number of the limiting members is the same as the number of the limiting notches and are arranged on the supporting frame in a one-to-one correspondence.

[0011] Exemplarily, the wheel body has an initial position and a raised position relative to the support bottom surface, wherein the wheel body in the raised position has a first distance from the support bottom surface, and the wheel body in the initial position has a second distance from the support bottom surface, and the first distance is greater than the second distance.

[0012] When the wheel body is in the initial position, the rotating connection member abuts against the support frame body, and when the wheel body is in the raised position, the rotating connection member is spaced apart from the support frame body.

[0013] Exemplarily, when the wheel body is in the raised position, a support pad is detachably installed between the rotating connector and the support frame.

[0014] Exemplarily, there are multiple support pads, wherein the thicknesses of the multiple support pads are the same, or the thicknesses of at least two of the multiple support pads are different.

[0015] Exemplarily, the lifting member includes a jack.

[0016] According to another aspect of the present invention, a sintering machine system is further provided, comprising a sintering machine trolley and any one of the above-mentioned star wheels, wherein the wheel body rotates to drive the sintering machine trolley to move.

[0017] A series of simplified concepts are introduced in the summary of the invention, which will be further described in detail in the detailed description. The summary of the invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0018] The advantages and features of the present invention are described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following drawings of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0020] Figure 1 A schematic structural diagram of a sintering machine system according to an exemplary embodiment of the present invention;

[0021] Figure 2 is a schematic structural diagram of a star wheel according to an exemplary embodiment of the present invention;

[0022] Figure 3 for Figure 2 A partial enlarged view of part A;

[0023] Figure 4 Schematic diagram of the structure of a star wheel according to an exemplary embodiment of the present invention.

[0024] The above drawings include the following reference numerals:

[0025] 10. Star wheel; 110. Wheel body; 1110. Gear teeth; 1111. First section; 1112. Second section; 120. Rotary connector; 1210. Bearing seat; 1220. Connecting pad; 130. Support frame; 140. Lifting member; 150. Limiting member; 160. Fastener; 170. Support pad; 20. Sintering machine trolley. DETAILED DESCRIPTION

[0026] In the following description, a large amount of details are provided so that the present invention can be thoroughly understood. However, it will be appreciated by those skilled in the art that the following description only exemplarily illustrates a preferred embodiment of the present invention, and the present invention can be implemented without one or more such details. In addition, in order to avoid confusion with the present invention, some technical features well known in the art are not described in detail.

[0027] In order to fully understand the embodiments of the present invention, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other embodiments.

[0028] In an embodiment of the present invention, a star wheel is provided, which can be used to drive the sintering machine trolley to move. Figure 1 and Figure 2, the star wheel 10 may include a wheel body 110, a rotating connection 120, a support frame 130 and a lifting member 140. Among them, a plurality of gear teeth 1110 are arranged on the wheel body 110. When the wheel body 110 rotates, part of the structure of the sintering machine trolley 20 cooperates with the gear teeth 1110 to realize the driving of the sintering machine trolley 20 by the star wheel 10. The rotating connection 120 may be connected to the wheel body 110 and drive the wheel body 110 to rotate. The rotating connection 120 drives the wheel body 110 to rotate under the action of the sintering machine trolley 20. The support frame 130 may be located on the support bottom surface, and the support frame 130 supports the wheel body 110 through the rotating connection 120. The support bottom surface may be the ground, or any other plane that can support the support frame 130. The lifting member 140 may be connected to the rotating connection 120, and the lifting member 140 may drive the wheel body 110 to approach or move away from the support bottom surface through the rotating connection 120. The lifting member 140 can lift or lower the rotating connector 120, thereby lifting or lowering the wheel body 110. The process in which the wheel body 110 moves away from the supporting bottom surface is the lifting process, and the process in which the wheel body 110 approaches the supporting bottom surface is the lowering process. The rotating connector 120 and the support frame 130 can be connected and fixed by a fastener 160. When the lifting member 140 lifts or lowers the wheel body 110, the fastener 160 is removed so that the rotating connector 120 can be separated from the support frame 130. After the lifting or lowering adjustment process is completed, the fastener 160 is installed to fix the rotating connector 120 to the support frame 130. Exemplarily, the fastener 160 can be a stud, and nuts can be respectively provided at both ends of the stud.

[0029] In the prior art, the sintering machine trolley that has been arched is usually adjusted. These adjustments are based on the phenomenon and cannot prevent the occurrence of the arching phenomenon. After simulating and analyzing the meshing of the star wheel 10 and the sintering machine trolley 20, the inventors found that the arching of the sintering machine trolley 20 is due to the upward friction force of the gear teeth 1110 of the star wheel 10 on the sintering machine trolley 20. Specifically, in combination with reference to Figure 1 and Figure 3 Each gear tooth 1110 has a first section 1111 and a second section 1112 (to facilitate distinguishing the first section 1111 and the second section 1112, Figure 3The second section 1112 is a dotted line), when the sintering machine trolley 20 is engaged with the gear 1110, the wheel body 110 rotates clockwise, and the gear 1110 contacts and engages with the sintering machine trolley 20 and then leaves. At the moment of engagement, since the second section 1112 contacts the sintering machine trolley 20, an upward friction force is applied to the sintering machine trolley 20. When the friction force is large enough, it will cause the occurrence of arching. In the present application, the wheel body 110 is lifted, that is, the first section 1111 can contact with the sintering machine trolley 20, reducing the upward friction of the sintering machine trolley 20, and when the first section 1111 contacts with the sintering machine trolley 20, a downward component force can be applied to the sintering machine trolley 20 to prevent the occurrence of arching. It should be noted that the structure of the first section 1111 and the second section 1112 of the gear 1110 is set as the structure commonly used by the gear 1110 of the star wheel 10 in the prior art. It is understandable that the purpose of changing the meshing position of the wheel body 110 and the sintering machine trolley 20 can also be achieved by moving down the track of the sintering machine trolley 20, but it is difficult in reality. Alternatively, in some solutions, the tooth shape of the gear teeth is adjusted to reduce the occurrence of the arching phenomenon, but this involves changing the shape of the commonly used wheel body, which has greater risks and costs.

[0030] The star wheel 10 provided in the present application can move the wheel body 110 away from or close to the supporting bottom surface by setting the lifting member 140, that is, it can lift the wheel body 110. In this way, the meshing position of the star wheel 10 and the sintering machine trolley 20 can be changed, the upward friction of the wheel body 110 on the sintering machine trolley 20 can be reduced, and the occurrence of the arching phenomenon can be avoided.

[0031] For example, refer to Figure 2 and Figure 4 , the rotating connection member 120 may include a bearing seat 1210, the bearing seat 1210 may include a fixed seat and a rotating ring rotatable relative to the fixed seat, the rotating ring may be connected to the wheel body 110 and rotate together with the wheel body 110, the fixed seat may be connected to the lifting member 140 and may drive the rotating ring and the wheel body 110 together to approach or move away from the supporting bottom surface under the action of the lifting member 140. In other words, the lifting member 140 is connected to the fixed seat, the lifting member 140 may lift or lower the fixed seat, and the fixed seat, the rotating ring and the wheel body 110 may rise or fall as a whole. In this way, the setting of the rotating ring may ensure the rotation of the wheel body 110, the setting of the fixed seat may facilitate the connection and operation of the lifting member 140, and the structural setting may be simpler. Exemplarily, the bearing seat 1210 may be made of cast steel and may be weldable.

[0032] For example, in conjunction with reference Figure 2 and Figure 4, the rotating connector 120 may further include a connecting pad 1220, the connecting pad 1220 may be connected to the bottom surface of the fixed seat, and the lifting member 140 may be connected to the side of the connecting pad 1220 away from the fixed seat. In other words, the lifting member 140 is arranged at the bottom of the rotating connector 120. The lifting member 140 may be located between the support bottom surface and the rotating connector 120. The lifting member 140 is located at the bottom and pushes the rotating connector 120 upward to make the wheel body 110 away from the support bottom surface. Accordingly, the upward thrust of the lifting member 140 is reduced, so that the wheel body 110 is close to the support bottom surface. The setting of the connecting pad 1220 can make the lifting member 140 better apply force to the rotating connector 120, and under the action of the connecting pad 1220, the fixed seat can be more evenly stressed. The lifting member 140 is located at the bottom of the rotating connector 120, and the thrust of the lifting member 140 can realize that the wheel body 110 is away from or close to the support surface, avoiding occupying external space. For example, after the initial installation and adjustment is completed, the connection pad 1220 can be welded and fixed to the bearing seat 1210. In an embodiment not shown, the lifting member can be located on the side of the wheel body. In an embodiment not shown, the lifting member can be directly connected to the fixing seat.

[0033] For example, in conjunction with reference Figure 2 and Figure 4 , a limiting member 150 may be provided on the support frame 130, and the limiting member 150 may be extended in a direction away from the support bottom surface, and a limiting notch adapted to the limiting member 150 may be provided on the connecting pad 1220, and the limiting member 150 is snapped into the limiting notch. The limiting notch may be located anywhere on the connecting pad 1220, and it is sufficient to ensure the snap-fit ​​with the limiting member 150. The limiting member 150 may be set to any shape according to the use requirements. For example, the limiting member 150 may be cylindrical. The limiting notch may be correspondingly set to a semicircular notch, and the diameter of the semicircular notch is the same as the diameter of the limiting member 150. It can be understood that in the process of the wheel body 110 approaching or moving away from the support bottom surface, the wheel body 110 only needs to move in the vertical direction. The setting of the limiting member 150 can limit the connection pad 1220 to prevent the connection pad 1220 from moving in the horizontal direction, that is, to prevent the rotating connection member 120 and the wheel body 110 connected to the rotating connection member 120 from moving in the horizontal direction. In this way, the fixed position of the wheel body 110 in the horizontal direction can be better ensured.

[0034] For example, in conjunction with reference Figure 2 and Figure 3, there can be at least two limiting notches and they are respectively located on different sides of the connecting pad 1220, and the number of the limiting members 150 can be the same as the number of the limiting notches and they are arranged on the supporting frame 130 in a one-to-one correspondence. There can be two limiting notches, and the number of the limiting members 150 is two. Further, the two limiting notches can be respectively located on opposite sides in the length direction of the connecting pad 1220. The limiting members 150 and limiting notches arranged in this way have a better limiting effect.

[0035] For example, refer to Figure 2 , the wheel body 110 can have an initial position and a lifting position relative to the support bottom surface. Among them, there is a first distance between the wheel body 110 in the lifting position and the support bottom surface, and there is a second distance between the wheel body 110 in the initial position and the support bottom surface, and the first distance is greater than the second distance. When the wheel body 110 is in the initial position, the rotating connection member 120 is against the support frame body 130, and when the wheel body 110 is in the lifting position, the rotating connection member 120 is spaced apart from the support frame body 130. In an embodiment in which a connecting pad 1220 is provided, the initial position can be understood as the connecting pad 1220 directly against the support frame body 130, and the lifting position can be understood as the preset position after the lifting member 140 is lifted. It can be understood that, depending on the actual situation on site, the height to which the wheel body 110 needs to be lifted is different, that is, the lifting position can be multiple positions, and the first distance is different but all greater than the second distance. Among them, the distance between the wheel body 110 and the support bottom surface can be the distance between the rotation center of the wheel body 110 and the support bottom surface, and can also be the distance between the lowest point or the highest point of the wheel body 110 and the support bottom surface. The first distance and the second distance are only used to distinguish the position of the wheel body 110 at different workstations, and have nothing to do with which part of the structure of the wheel body 110 is selected, and no further explanation is given. The initial position can be understood as when the star wheel 10 is operating normally, the sintering machine trolley 20 does not have an arching phenomenon, and at this time the rotating connector 120 is against the support frame 130. After the sintering machine trolley 20 has an arching phenomenon, the lifting member 140 lifts the wheel body 110, and the rotating connector 120 is separated from the support frame 130. At this time, the lifting member 140 can support the rotating connector 120 to achieve support for the wheel body 110. In this way, the stability of the position of the wheel body 110 at different workstations can be ensured.

[0036] For example, continue to refer to Figure 2, when the wheel body 110 is in the lifting position, a support pad 170 is detachably installed between the rotating connector 120 and the support frame 130. That is to say, when the wheel body 110 is lifted to the lifting position, the support pad 170 can be installed between the rotating connector 120 and the support frame 130. The rotating connector 120 is supported on the support frame 130 through the support pad 170, so that the stability of the wheel body 110 in the lifting position can be guaranteed. Moreover, at this time, the support frame 130 can share the pressure on the lifting member 140, and even the support frame 130 can completely bear the pressure of the wheel body 110 and the rotating connector 120 connected to the wheel body 110 through the support pad 170. Exemplarily, a through hole can be provided on the support pad 170, and the lifting member 140 is connected to the connection pad 1220 through the through hole.

[0037] Exemplarily, there may be a plurality of support pads 170, wherein the thickness of the plurality of support pads 170 may be the same, or the thickness of at least two of the plurality of support pads 170 may be different. This arrangement can satisfy the support of the support frame 130 to the wheel body 110 and the rotating connector 120 at different lifting positions. The total thickness of the plurality of support pads 170 does not exceed 40 mm, so that the wheel body 110 can avoid generating an excessively large downward force on the sintering machine trolley 20, and avoid increasing the wear on the sintering machine trolley 20. In actual operation, the thickness of the support pad can be adjusted multiple times until the sintering machine trolley 20 just does not arch when the sintering machine trolley 20 is empty.

[0038] For example, refer to Figure 2 , the lifting member 140 may include a jack. Specifically, the jack may include a mounting end and a lifting end movable relative to the mounting end. The mounting end may be disposed on the support bottom surface, and the lifting end is connected to the connecting pad 1220. The jack may ensure the lifting of the wheel body 110, and the structure is simpler and the cost is lower. In an embodiment not shown, the lifting member may be any other type of lifting equipment, for example, a trolley.

[0039] Exemplarily, the specific operation process can be as follows: loosen the fastener 160, lift the connecting pad 1220 through the lifting member 140, and the connecting pad 1220 moves up together with the bearing seat 1210 and the wheel body 110. At this time, the connecting pad 1220 is spaced apart from the support frame 130, and the support pad 170 is installed between the connecting pad 1220 and the support frame 130. After the adjustment process is completed, the fastener 160 is screwed. The movement process of the connecting pad 1220 is always under the limiting action of the limiting member 150, ensuring that the horizontal position of the wheel body 110 remains unchanged and only moves in the vertical direction. After the height of the wheel body 110 moves up, the meshing position of the gear 1110 and the sintering machine trolley 20 moves up, and the upward friction force of the wheel body 110 on the sintering machine trolley 20 becomes smaller. At the same time, the wheel body 110 generates a downward component force on the sintering machine trolley 20 to prevent the sintering machine trolley 20 from moving up and arching. The adjustment process is simple to operate, and there is no need to disassemble structural parts such as the sintering machine trolley 20 or the wheel body 110, so that empty car adjustment can be achieved.

[0040] According to another aspect of the present invention, a sintering machine system is also provided. The sintering machine system may include a sintering machine trolley 20 and any one of the above-mentioned star wheels 10. The wheel body 110 rotates to drive the sintering machine trolley 20 to move. Since the star wheel 10 adopts the technical solution of any of the above-mentioned embodiments, the sintering machine system at least has the beneficial effects brought by the technical solution of the above-mentioned embodiments, which will not be repeated here. The sintering machine system can be provided with any type of belt sintering machine. It can be understood that the sintering machine system can be obtained by modifying the existing sintering machine system, that is, adding a lifting member 140, etc., to solve the arching problem of the sintering machine trolley 20.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by directional words such as "front", "back", "up", "down", "left", "right", "lateral", "vertical", "vertical", "horizontal", "top", "bottom", etc. is usually based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words 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 cannot be understood as limiting the scope of protection of the present invention; the directional words "inside" and "outside" refer to the inside and outside relative to the contour of each component itself.

[0042] For ease of description, regional relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the regional positional relationship between one or more components or features shown in the figure and other components or features. It should be understood that regional relative terms include not only the orientation of the components as described in the figure, but also different orientations in use or operation. For example, if the components in the accompanying drawings are inverted as a whole, the components "above other components or features" or "above other components or features" will include the situation where the components are "below other components or structures" or "below other components or structures". Therefore, the exemplary term "above" may include both "above" and "below". In addition, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this article is intended to include all of these situations.

[0043] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, parts, components and / or combinations thereof.

[0044] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0045] The present invention has been described by the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the present invention to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the present invention is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention. The protection scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A star wheel for driving a sintering machine trolley to move, characterized in that: include: Wheel body; A rotating connecting member, the rotating connecting member is connected to the wheel body and drives the wheel body to rotate; A support frame, the support frame is located on the support bottom surface, and the support frame supports the wheel body through the rotating connecting member; as well as A lifting member is connected to the rotating connecting member, and the lifting member drives the wheel body to approach or move away from the supporting bottom surface through the rotating connecting member.

2. The star wheel according to claim 1, characterized in that: The rotating connecting member includes a bearing seat, and the bearing seat includes a fixed seat and a rotating ring rotatable relative to the fixed seat. The rotating ring is connected to the wheel body and rotates together with the wheel body. The fixed seat is connected to the lifting member and drives the rotating ring and the wheel body to approach or move away from the supporting bottom surface under the action of the lifting member.

3. The star wheel according to claim 2, characterized in that: The rotating connecting member also includes a connecting pad, which is connected to the bottom surface of the fixing seat, and the lifting member is connected to a side of the connecting pad facing away from the fixing seat.

4. The star wheel according to claim 3, characterized in that: A limiting member is arranged on the support frame, and the limiting member is extended in a direction away from the support bottom surface. A limiting notch matched with the limiting member is arranged on the connection pad, and the limiting member is clamped in the limiting notch.

5. The star wheel according to claim 4, characterized in that: There are at least two limiting notches, which are respectively located on different sides of the connecting pad. The number of the limiting members is the same as the number of the limiting notches and they are arranged on the supporting frame in a one-to-one correspondence.

6. The star wheel according to any one of claims 1 to 5, characterized in that: The wheel body has an initial position and a raised position relative to the support bottom surface, wherein a first distance exists between the wheel body in the raised position and the support bottom surface, and a second distance exists between the wheel body in the initial position and the support bottom surface, and the first distance is greater than the second distance. When the wheel body is in the initial position, the rotating connection member abuts against the support frame body, and when the wheel body is in the raised position, the rotating connection member is spaced apart from the support frame body.

7. The star wheel according to claim 6, characterized in that: When the wheel body is in the raised position, a support pad is detachably mounted between the rotary connector and the support frame.

8. The star wheel according to claim 7, characterized in that: There are multiple support pads, wherein the thicknesses of the multiple support pads are the same, or at least two of the multiple support pads have different thicknesses.

9. The star wheel according to claim 8, characterized in that: The lifting member includes a jack.

10. A sintering machine system, characterized in that: The invention comprises a sintering machine trolley and the star wheel according to any one of claims 1 to 9, wherein the wheel body rotates to drive the sintering machine trolley to move.

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