A driving sprocket, track walking mechanism and engineering machinery

Abstract

The utility model discloses a drive sprocket, track walking mechanism and engineering machinery belong to engineering machinery technical field. The drive sprocket has the flange face for installing bolt, and the bolt hole is formed on the flange face, and the area around the bolt hole forms the contact area for contacting with bolt or its gasket, and the remaining area is the non-contact area, the non-contact area is configured to sink and recess relative to the contact area, so as to reduce the material usage, reduce the overall weight of drive sprocket, save material cost, can increase the surface area of flange face simultaneously, be favorable to the heat dissipation of drive sprocket in the use process. The machining area on the flange face is only the contact area, so as to reduce the machining area and reduce the processing cost. At the same time, the reduced local machining surface makes the flatness of bolt contact surface more easily controlled, and then can improve and enhance the clamping state after bolt tightening, reduces the risk of bolt loosening.

Description

Technical Field

[0001] This utility model belongs to the field of engineering machinery technology, and in particular relates to a tracked engineering machinery, specifically a drive sprocket used in tracked engineering machinery. Background Technology

[0002] A drive sprocket is a sprocket assembly in a mechanical transmission system that directly receives power and drives the track chain. It is commonly found in the running gear of tracked construction machinery such as excavators and bulldozers. The drive sprocket transmits power from the hydraulic motor or engine to the tracks through engagement with the track chain, thereby driving the entire machine to move.

[0003] Current tracked construction machinery, such as excavators, often has a flange face 10 formed on its drive sprocket for mounting bolts, such as... Figure 1 As shown. The flange face 10 is generally annular, with multiple bolt holes 11 evenly or non-evenly spaced around its circumference. Each bolt hole 11 is used to install one bolt, and a washer can be installed on the bolt. To solve the problem of bolts easily loosening after being tightened on the flange face 10, the existing technology is to machine the entire circumference of the flange face 10 to achieve the required flatness.

[0004] Since the entire flange surface 10 is a single plane, both the contact area that comes into contact with the bolts or their gaskets and the non-contact area that does not come into contact with the bolts or their gaskets use the same amount of material and the same processing technology. Therefore, there are many machined areas. For the non-contact areas, there is a waste of resources such as materials, processing, and protection of the machined surfaces. This results in the entire drive sprocket being heavy, costly, and inefficient, and the problem of loose bolts remains relatively prominent. Summary of the Invention

[0005] This utility model addresses at least one of the aforementioned technical problems in the background art by proposing a drive sprocket that reduces the machining area, lightens the weight of the drive sprocket, and lowers costs by optimizing the structure of its flange surface.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: In one aspect, the present invention provides a drive sprocket having a flange face for mounting bolts, bolt holes formed on the flange face, a contact area of ​​the flange face surrounding the bolt holes for contacting the bolts or their gaskets, and a non-contact area; wherein the non-contact area is recessed relative to the contact area, and the machined area on the flange face is only the contact area.

[0007] In some embodiments of this application, when multiple bolt holes are formed on the flange surface, an independent contact area can be formed around each bolt hole, and a non-contact area can be formed between two adjacent contact areas to increase the outer surface area of ​​the flange surface and facilitate heat dissipation during the use of the workpiece.

[0008] In some embodiments of this application, the size of the contact area can be configured to match the bottom surface size of the bolt head or the bottom surface size of the washer mounted on the bolt. While meeting the bolt installation and clamping requirements, minimizing the contact area reduces the machining area, thereby further reducing processing costs. The reduced local machining surface makes it easier to control requirements such as the flatness of the bolt contact surface, further improving the clamping condition after bolt tightening and reducing the risk of bolt loosening.

[0009] In some embodiments of this application, the outer contour shape of the contact area can be a trapezoid, a circle, a semicircle, a square, or other easily processed shapes.

[0010] In some embodiments of this application, the flange face has an upper surface and a lower surface that are positioned opposite each other. The upper surface is used to contact a bolt or its gasket, and the contact area and non-contact area are formed on the upper surface. The lower surface can be designed as a flat plane or form the same concave-convex shape as the upper surface, and the concave-convex positions correspond vertically to the positions of the non-contact area and the contact area on the upper surface. That is, a recessed feature is also formed on the lower surface of the flange face at the position corresponding to the non-contact area of ​​the upper surface, in order to further save materials, reduce the weight of the drive sprocket, and reduce costs.

[0011] In some embodiments of this application, the flange face can be designed as an annular shape, with the axial width of its outer ring surface being uniform and equal to the maximum thickness of the flange face, that is, equal to the distance from the contact area of ​​the upper surface of the flange face to the lower surface, in order to improve the connection strength between the flange face and other structural components.

[0012] In some embodiments of this application, a ring of teeth can be formed around the outer side of the outer annular surface of the flange, and power transmission can be achieved by the teeth meshing with the track.

[0013] In some embodiments of this application, a spoke can be added between the flange face and the gear teeth. That is, a spoke is formed around the outer side of the outer ring of the flange face, and a gear tooth is formed around the outer side of the spoke. By adding spokes, the load support strength and torque transmission performance of the drive sprocket can be improved.

[0014] In another aspect, this utility model also proposes a tracked walking mechanism, including a frame, a track, and a drive sprocket, a guide wheel, a carrier wheel, and a support wheel mounted on the frame. The track is arranged around the outer periphery of the drive sprocket, guide wheel, carrier wheel, and support wheel. The drive sprocket meshes with the track to transmit power. The drive sprocket has a flange face for mounting bolts, and bolt holes are formed on the flange face. The area surrounding the bolt holes forms a contact area of ​​the flange face for contact with the bolts or their gaskets, and the remaining area is a non-contact area. The non-contact area is recessed relative to the contact area, and the machined area on the flange face is only the contact area.

[0015] In another aspect, this utility model also proposes an engineering machine equipped with a tracked traveling mechanism. The tracked traveling mechanism includes a frame, tracks, and drive sprockets, idler wheels, carrier rollers, and support rollers mounted on the frame. The tracks are arranged around the outer periphery of the drive sprockets, idler wheels, carrier rollers, and support rollers. The drive sprockets mesh with the tracks to transmit power. The drive sprocket has a flange face for mounting bolts, and bolt holes are formed on the flange face. The area surrounding the bolt holes forms a contact area of ​​the flange face for contact with bolts or their gaskets, and the remaining area is a non-contact area. The non-contact area is recessed relative to the contact area, and the machined area on the flange face is only the contact area.

[0016] Compared with the prior art, the advantages and positive effects of this utility model are mainly reflected in: 1. This utility model divides the flange surface of the drive sprocket into areas to form a contact area for contact with bolts or their gaskets and a non-contact area that does not contact bolts or their gaskets. The non-contact area is recessed relative to the contact area, that is, some material is removed, thereby reducing the amount of material used, reducing the overall weight of the drive sprocket, and saving material costs.

[0017] 2. By configuring the non-contact area of ​​the flange surface to be recessed relative to the contact area, the surface area of ​​the flange surface can be increased, which is more conducive to heat dissipation of the drive sprocket during use.

[0018] 3. This utility model only requires machining of the contact area of ​​the flange surface to meet the flatness requirements of the bolt contact area. The non-contact area does not need to be machined, thereby reducing the machining area, processing cost, and protection cost of the machined surface.

[0019] 4. By limiting the machining area to the contact area of ​​the flange surface, the reduced local machining area makes it easier to control the flatness and other requirements of the bolt contact surface, thereby improving the clamping state after the bolt is tightened and reducing the risk of bolt loosening.

[0020] 5. This utility model forms the contact area and non-contact area on the side of the flange surface for bolt insertion and installation, which makes it easier to distinguish the installation direction when assembling bolts and improves assembly efficiency.

[0021] 6. Applying the drive sprocket of this utility model to the track walking mechanism of engineering machinery can, on the one hand, improve the reliability of the assembly between the drive sprocket and the drive unit of the transmission device (such as the reducer for walking), and ensure that the drive sprocket can effectively transmit power to the track; on the other hand, it can optimize the stress distribution of the drive sprocket after it is loaded to a certain extent and extend the service life of the drive sprocket.

[0022] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0024] Figure 1 This is a schematic diagram of one embodiment of an existing drive sprocket; Figure 2 This is a schematic diagram of the structure of one embodiment of the drive sprocket proposed in this utility model; Figure 3 yes Figure 2 A 3D view of the drive sprocket shown; Figure 4 yes Figure 2 A schematic diagram of one embodiment of the outer annular surface of the flange in the drive sprocket shown; Figure 5 This is a schematic diagram of another embodiment of the drive sprocket proposed in this utility model; Figure 6 This is a schematic diagram of another embodiment of the drive sprocket proposed in this utility model; Figure 7 yes Figure 5 and Figure 6 A schematic diagram of one embodiment of the drive sprocket back shown; Figure 8This is a schematic diagram of the structure of one embodiment of the tracked walking mechanism proposed in this utility model; Figure 9 Based on Figure 8 A schematic diagram of a chassis with a tracked walking mechanism design, as shown in the figure. Figure 10 This is a schematic diagram of the overall structure of one embodiment of engineering machinery.

[0025] In the picture, 10. Flange face; 11. Bolt holes; 100. Drive sprocket; 110. Tooth; 120. Flange face; 121. Upper surface; 122. Lower surface; 123. Contact area; 124. Non-contact area; 125. Outer ring surface; 130. Spoke; 140. Bolt hole; 200. Tracked traveling mechanism; 210. Chassis; 211. Rear support component; 212. Front support component; 213. Upper support; 220. Track; 230. Idler wheel; 240. Carrier chain wheel; 250. Track roller; 300 Tracked chassis; 310 Chassis base; 400 Slewing mechanism; 500 Control mechanism; 600 Working device. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0027] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "inner", "outer", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or internal communication within components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. In the description of the embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0029] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0030] See Figure 2 The drive sprocket 100 in this embodiment mainly includes gear teeth 110 for meshing with the track chain and flange face 120 for mounting the drive sprocket 100 to the drive unit connection end of the shaft component or transmission device.

[0031] The gear teeth 110 are located on the outer side of the flange face 120, and are arranged in a circle at equal intervals along the circumference. The tooth profile and number of teeth of the gear teeth 110 can be matched with the chain pitch, wheel train and track running system they mesh with to achieve efficient power transmission.

[0032] The flange face 120 is generally annular and located inside the gear teeth 110, with bolt holes 140 formed thereon. Multiple bolt holes 140 can be provided, distributed circumferentially around the annular flange face 120 at equal or unequal intervals. Each bolt hole 140 can accommodate one bolt or a combination of a bolt and a washer. This multi-bolt connection method improves the robustness and stress balance of the assembly between the drive sprocket 100 and the shaft components or transmission device.

[0033] The inner ring of the flange face 120 allows the drive unit of the shaft system or transmission device to pass through. The drive unit drives the drive sprocket 100 to rotate, thereby driving the track that meshes with the teeth 110 of the drive sprocket 100 to move.

[0034] A spoke 130 can be added between the outer circumferential surface of the flange face 120 and the gear tooth 110, such as Figure 5 , Figure 6 As shown. The spokes 130 are configured to surround the outer side of the flange face 120, and the spokes 130 are surrounded by a ring of teeth 110. By increasing the spokes 130, the load support strength and torque transmission performance of the drive sprocket 100 can be improved.

[0035] In this embodiment, the drive sprocket 100 has a flange surface 120 with an upper surface 121 and a lower surface 122 that are positioned opposite each other along the axial direction of the drive sprocket. Figure 5, Figure 7 As shown. The upper surface 121 is the bolt insertion surface, that is, the surface that contacts the bolt head or the washer after the bolt is installed. This surface needs to be machined to meet the local flatness requirements of the contact area. To reduce the machining area, lighten the overall weight of the drive sprocket, and lower costs, this embodiment divides the upper surface 121 of the flange face into regions. The area that contacts the bolt head or washer after bolt installation is defined as the contact area 123 of the flange face, and the area that does not contact the bolt head or washer is defined as the non-contact area 124 of the flange face. When manufacturing the flange face 120 using molding processes such as casting, forging, or 3D printing, the non-contact area 124 is designed to be recessed relative to the contact area 123, such as... Figure 3 As shown, some material is removed from the non-contact area 124 to reduce material usage and lighten the overall weight of the drive sprocket 100. After the flange face 120 is formed, only the contact area 123 on the flange face 120 is machined to meet the local flatness requirements, which enables the bolts to be fastened on the flange face 120. This further improves and enhances the clamping state after the bolts are tightened, better solving the prominent bolt loosening problem that is common in traditional drive sprockets.

[0036] The non-contact area 124 of the flange face is recessed, so that the upper surface 121 of the entire flange face forms an uneven surface with undulations. This increases the outer surface area of ​​the flange face 120, which is beneficial for heat dissipation of the drive sprocket 100 during use.

[0037] By designing a special structure for the upper surface 121 of the flange face, it is easier to distinguish which side of the flange face 120 is the contact side of the bolt head when installing bolts, thereby enhancing the identification of the installation direction and improving the assembly efficiency of the operators.

[0038] The lower surface 122 of the flange face can be designed to be on the same plane, such as... Figure 7 As shown. Of course, the lower surface 122 of the flange can also be designed as an uneven surface with undulations, mimicking the shape of the upper surface 121. That is, on the lower surface 122, the parts corresponding to the non-contact area 124 of the upper surface also form a recessed structural feature, so that the concave and convex positions of the lower surface 122 correspond vertically to the positions of the non-contact area 123 and the contact area 124 of the upper surface, forming the same shape as the upper surface 123. This can further reduce the amount of material used while ensuring the overall strength of the drive sprocket 100 and meeting the design requirements for the installation and bolt tightening of the drive sprocket 100, thus further reducing the overall weight of the drive sprocket 100 and further reducing material costs.

[0039] In some embodiments, the outer contour shape of the contact area 123 can be designed as a trapezoid (e.g., Figure 2 (as shown), circular or semi-circular (e.g.) Figure 5 (as shown), square (such as) Figure 6 (As shown) and other conventional, easily machinable shapes. For cases where only a bolt is installed at the bolt hole 140, the size of the contact area 123 can be designed to match the bottom surface size of the bolt head, meeting the basic requirements for bolt installation and clamping. For example, the contact area 123 can be designed to completely overlap with or slightly larger than the bottom surface of the bolt head after the bolt is installed in the bolt hole 140; in some cases, it may be allowed to be slightly smaller than the bottom surface of the bolt head. For cases where both a bolt and a washer are installed at the bolt hole, the size of the contact area 123 can be designed to match the bottom surface size of the washer, meeting the basic requirements for bolt installation and clamping. For example, the contact area 123 can be designed to completely overlap with the bottom surface of the washer, or slightly larger or smaller than the bottom surface of the washer, after the bolt and washer are installed in the bolt hole 140. By limiting the machining area to the contact area 123 of the flange face, the non-contact area 124 and the lower surface 122 of the flange face do not require machining. By limiting the area of ​​the contact area 123 as much as possible, the machining area can be reduced to a minimum, thereby reducing machining costs and the cost of protecting the machined surface. At the same time, the reduced local machining area makes it easier to control and ensure the flatness requirements of the bolt contact surface.

[0040] To ensure that the flange face 120, after removing some material, still maintains its connection strength with the gear teeth 110 or the spokes 130, this embodiment preferably designs the outer ring surface 125 of the flange face 120 connecting to the gear teeth 110 or the spokes 130 to have a uniform width, such as... Figure 4 As shown. That is, the axial width W of the outer ring surface 125 of the flange face 120 is uniform and equal to the maximum thickness of the flange face 120, that is, equal to the distance from the contact area 123 of the upper surface of the flange face to the lower surface 122. This can keep the area of ​​the connection surface between the flange face 120 and the gear tooth 110 or the spoke 130 unchanged, thereby eliminating the impact of material saving on the connection strength.

[0041] Industrial applicability

[0042] The drive sprocket 100 of this embodiment is applied to the track walking mechanism 200 to drive the track in the track walking mechanism 200 to rotate.

[0043] Specifically, such as Figure 8 As shown, the tracked walking mechanism 200 in this embodiment mainly includes key components such as a frame 210, track 220, drive sprocket 100, guide wheel 230, track roller 240, and support roller 250.

[0044] The chassis 210 extends forward and backward along the traveling direction of the tracked walking mechanism 200. A rear support member 211 is provided at the rear end for mounting the drive sprocket 100, positioning the drive sprocket 100 behind the chassis 210. A front support member 212 is provided at the front end of the chassis 210 for mounting the guide wheel 230, positioning the guide wheel 230 in front of the chassis 210. An upper bracket 213 is mounted on the top of the chassis 210, securing the track roller 240. Track rollers 250 are mounted at the bottom of the chassis 210, supporting the weight of the entire machine and transferring it to the ground.

[0045] The track 220 surrounds the drive sprocket 100, idler wheel 230, carrier roller 240, and track roller 250. The coordinated operation of the drive sprocket 100, idler wheel 230, carrier roller 240, and track roller 250 forms a complete track drive system. Specifically, the drive sprocket 100 meshes with the track chain to drive the track 220 to rotate, enabling the traveling mechanism to move. The idler wheel 230 guides the track 220 to wind correctly. The carrier roller 240 lifts the track 220 upwards, providing it with a certain tension to ensure normal operation and tension. The track roller 250 rolls on the track 220 to prevent lateral slippage and ensure the track 220 does not fall off during turning or traveling. The 220 track increases the contact area between the machine and the ground, thereby reducing pressure and ensuring that the machine can move smoothly and stably even in harsh road conditions (such as muddy ground, potholes, etc.).

[0046] Two sets of tracked walking mechanisms 200, as described in this embodiment, are respectively installed on opposite sides of a chassis base 310, such as... Figure 9 As shown, specifically, the chassis base 310 can be connected to the frame 210 in the two sets of tracked walking mechanisms 200, thereby forming a tracked chassis 300.

[0047] A slewing mechanism 400 is mounted on the top surface of the chassis base 310. An operating mechanism 500, such as a driver's cab, is mounted on the slewing mechanism 400. A working device 600, such as a bucket, is mounted on the operating mechanism 500. Figure 10 As shown, this can be used to construct a tracked engineering machine, such as a tracked excavator.

[0048] During operation, the control mechanism 500 controls the tracked walking mechanism 200 to move the construction machinery to the work site. Then, the control mechanism 500 drives the working device 600 to perform excavation, bulldozing, and other related operations. During operation, the slewing mechanism 400 can drive the control mechanism 500 and the working device 600 to rotate 360° horizontally to transport materials such as earth and rocks.

[0049] Applying the drive sprocket 100 of this embodiment to tracked engineering machinery can reduce weight, machining area, and cost, while optimizing the stress and stress distribution of the entire drive sprocket 100 under load, which is beneficial to extending the service life of the drive sprocket 100.

[0050] Of course, the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by this utility model.

Claims

1. A drive sprocket having a flange face for mounting bolts, bolt holes formed on the flange face, a contact area of ​​the flange face surrounding the bolt holes for contacting the bolts or their gaskets, and a non-contact area; characterized in that, The non-contact area is recessed relative to the contact area, and the machined area on the flange surface is only the contact area.

2. The drive sprocket according to claim 1, characterized in that, Multiple bolt holes are formed on the flange surface, and an independent contact area is formed around each bolt hole, with a non-contact area formed between two adjacent contact areas.

3. The drive sprocket according to claim 1, characterized in that, The dimensions of the contact area are adapted to the bottom surface dimensions of the bolt head or the bottom surface dimensions of the washer mounted on the bolt, and meet the bolt installation and clamping requirements.

4. The drive sprocket according to claim 1, characterized in that, The outer contour shape of the contact area is trapezoidal, circular, semi-circular, or square.

5. The drive sprocket according to any one of claims 1 to 4, characterized in that, The flange face has an upper surface and a lower surface that are positioned opposite each other. The upper surface is used to contact a bolt or its gasket. The contact area and the non-contact area are formed on the upper surface. The lower surface is a plane or has the same concave and convex shape as the upper surface, and the concave and convex positions correspond vertically to the positions of the non-contact area and the contact area on the upper surface.

6. The drive sprocket according to claim 5, characterized in that, The flange face is circular in shape, and the axial width of its outer ring surface is uniform and equal to the distance from the contact area of ​​the upper surface to the lower surface.

7. The drive sprocket according to claim 6, characterized in that, A ring of teeth is formed around the outer side of the outer annular surface of the flange.

8. The drive sprocket according to claim 6, characterized in that, A ring of spokes is formed around the outer side of the outer annular surface of the flange face, and a ring of teeth is formed around the outer side of the spokes.

9. A tracked walking mechanism, characterized in that, It includes a frame, a guide wheel, a track roller, a support roller, and a drive sprocket as described in any one of claims 1 to 8, wherein a track is arranged around the outer periphery of the drive sprocket, the guide wheel, the track roller, and the support roller, and the drive sprocket meshes with the track to transmit power.

10. An engineering machinery, characterized in that, It is equipped with the tracked walking mechanism as described in claim 9.

Images