Conveying device

Abstract

The utility model discloses a conveying device, including guide piece, conveying dolly and drive module, and guide piece is equipped with guide groove, conveying dolly is used for bearing work piece, and conveying dolly is equipped with bearing wheel, and bearing wheel includes gyro wheel and ball, gyro wheel has installation cavity, and gyro wheel's axial end surface has the passage that communicates with installation cavity, and ball is located in installation cavity, and the partial structure of ball is from the passage and projects, and the partial structure of gyro wheel is located in guide groove, and ball is contacted with the inner wall of guide groove, drive module is used for driving conveying dolly and moves along the extension direction of guide groove, the conveying device of the utility model can realize the direction through the contact of ball and guide groove inner wall, and ball can relatively guide groove inner wall and installation cavity and roll, and makes the contact point dynamic adaptation actual motion trajectory, and utilizes the influence of the self -adaptation characteristic of ball and eliminates installation error to motion trajectory.

Description

Technical Field

[0001] This utility model relates to the field of conveying technology, and in particular to a conveying device. Background Technology

[0002] The wheels of a rail transport vehicle typically consist of load-bearing wheels and guide wheels. The load-bearing wheels support the weight of the vehicle itself and the load it carries, while the guide wheels are in direct contact with the inner wall of the track. In related technologies, mounting grooves can be created at the pivot end where the load-bearing wheels are installed, and the guide wheels are installed within these grooves. However, this structure requires high precision in pivot installation. When there is a certain angular error in the pivot installation, the plane containing the guide wheels will also have an angle with the trajectory of the rail transport vehicle, affecting the smoothness and stability of the vehicle's movement. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a conveying device that achieves guidance through contact between balls and the inner wall of a guide groove. The balls can roll relative to the inner wall of the guide groove and the mounting cavity, allowing the contact point to dynamically adapt to the actual motion trajectory. The self-adaptive characteristics of the balls eliminate the influence of installation errors on the motion trajectory.

[0004] In a first aspect, embodiments of this application provide a conveying device, comprising:

[0005] Guide component, with guide groove;

[0006] A conveying trolley is used to carry workpieces. The conveying trolley is equipped with load-bearing wheels, which include rollers and balls. The rollers have mounting cavities, and the axial end faces of the rollers have channels communicating with the mounting cavities. The balls are disposed in the mounting cavities, and a portion of the ball structure extends out of the channel. A portion of the roller structure is located in the guide groove, and the balls are in contact with the inner wall of the guide groove.

[0007] A drive module is used to drive the conveying trolley to move along the extension direction of the guide groove.

[0008] According to the first aspect of the conveying device of this utility model, when the drive module drives the conveying trolley to move along the extension direction of the guide groove, a portion of the roller structure is placed inside the guide groove and bears the vertical load, while the portion of the ball extending out of the channel remains in contact with the inner wall of the guide groove. The ball can roll relative to the inner wall of the guide groove and the mounting cavity, allowing the contact point to dynamically adapt to the actual motion trajectory, and utilizing the adaptive characteristics of the ball to eliminate the influence of installation errors on the motion trajectory.

[0009] According to the first aspect, in one possible implementation, the mounting cavity is an annular structure with the central axis of the roller as its axis, and a plurality of the rollers are arranged in the mounting cavity along the circumference of the mounting cavity.

[0010] According to the first aspect, in one possible implementation, the roller includes a wheel body and a pressure plate, the axial end face of the wheel body is provided with a mounting groove, the channel is formed in the pressure plate, and the pressure plate is detachably connected to the wheel body so that the channel is disposed opposite to the mounting groove and forms the mounting cavity.

[0011] According to the first aspect, in one possible implementation, the mounting groove is an annular structure with the central axis of the wheel body as the axis, and the pressure plate includes two pressure rings, both of which are connected to the wheel body. The two pressure rings are concentrically arranged and form an annular channel between the two pressure rings.

[0012] According to the first aspect, in one possible implementation, the pressure ring is connected to the wheel body by a fastener, and the side of the pressure ring opposite to the wheel body has a countersunk hole for receiving the end of the fastener.

[0013] According to the first aspect, in one possible implementation, the inner wall of the channel includes two stop edges arranged radially opposite to each other along the wheel body, the two stop edges approaching each other in a direction away from the mounting groove, and the side edge of the stop edge away from the mounting groove is used to contact the ball to limit the ball along the axial direction of the wheel body.

[0014] According to the first aspect, in one possible implementation, the load-bearing wheel further includes a pivot, the roller is sleeved outside the pivot, and a bearing is provided between the wheel body and the pivot.

[0015] According to the first aspect, in one possible implementation, the pressure plate has a clearance hole that completely covers the bearing in the projection area of ​​the clearance hole on the wheel body along the axial direction of the wheel body.

[0016] According to the first aspect, in one possible implementation, the wheel body has a through hole extending along the axial direction, the wheel body includes a partition step disposed in the through hole, the partition step dividing the through hole into two mounting areas disposed opposite to each other, and each mounting area is provided with the bearing.

[0017] According to the first aspect, in one possible implementation, the conveying trolley includes a body and a mounting base, the mounting base being rotatably connected to the body in a vertical direction, and a pivot being connected to the mounting base, the pivot being arranged circumferentially in a horizontal direction.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 This is a partial structural schematic diagram of the conveying device in one embodiment of the present invention;

[0021] Figure 2 This is a partial cross-sectional structural diagram of the conveying device in one embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the cooperation structure between the load-bearing wheel and the guide groove in one embodiment of the present invention;

[0023] Figure 4 This is a cross-sectional structural diagram of a load-bearing wheel in one embodiment of the present invention;

[0024] Figure 5 This is a partial disassembly diagram of the load-bearing wheel in one embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the fit between the wheel and the pivot in one embodiment of the present invention;

[0026] Figure 7 for Figure 6 A magnified schematic diagram of a portion of region A in the middle;

[0027] Figure 8 This is a schematic diagram of the structure of the conveying trolley in one embodiment of the present invention.

[0028] Figure label:

[0029] 100. Guide component; 110. Guide groove;

[0030] 200. Conveying trolley; 210. Load-bearing wheel; 211. Roller; 2111. Wheel body; 21111. Mounting groove; 21112. Through hole; 21113. Separating step; 2112. Pressure plate; 2112a. Pressure ring; 21121. Channel; 21122. Stop edge; 21123. Clearance hole; 212. Ball bearing; 213. Pivot; 214. Bearing; 220. Car body; 230. Mounting base;

[0031] 300. Drive module; 310. Stator; 320. Mover;

[0032] 400. Fasteners;

[0033] 500, rack. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0037] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0038] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] In existing technologies, the wheels of rail transport vehicles typically consist of load-bearing wheels and guide wheels, with the guide wheels mounted in mounting grooves at the pivot ends of the load-bearing wheels. This structure requires extremely high precision in pivot installation. When there is an angular error in the pivot, the plane of the guide wheel will form an angle with the movement trajectory, causing the transport vehicle to jam or deviate during movement. For example, in automated production lines, transport trolleys need to travel back and forth frequently along fixed tracks, and traditional structures are prone to operational instability due to the accumulation of installation errors.

[0040] To address the aforementioned problems, this application provides a conveying device. For example... Figures 1 to 5 As shown, the conveying device includes a guide 100, a conveying trolley 200, and a drive module 300. The guide 100 has a guide groove 110. The conveying trolley 200 is provided with a load-bearing wheel 210. The load-bearing wheel 210 includes a roller 211 and a ball 212. The roller 211 has a mounting cavity, and its axial end face is provided with a channel 21121 communicating with the mounting cavity. Part of the ball 212 extends out from the channel 21121 and contacts the inner wall of the guide groove 110. The drive module 300 drives the conveying trolley 200 to move along the guide groove 110.

[0041] Part of the roller 211 is placed within the guide groove 110 and bears the vertical load, while the portion of the ball bearing 212 extending out of the channel 21121 remains in contact with the inner wall of the guide groove 110. When the conveyor trolley 200 moves, the ball bearing 212 can roll relative to the inner wall of the guide groove 110 and the mounting cavity, allowing the contact point to dynamically adapt to the actual movement trajectory. This embodiment integrates load-bearing and guiding functions into the roller 211, utilizing the adaptive characteristics of the ball bearing 212 to eliminate the influence of installation errors on the movement trajectory.

[0042] The guide groove 110 refers to a groove structure extending along the conveying direction, which can be implemented with a U-shaped or C-shaped cross section. The guide groove 110 provides a contact interface for the roller 211 and the ball bearing 212, and is used to accommodate the roller 211 and constrain the lateral displacement of the conveying trolley 200. The conveying trolley 200 refers to a moving unit used to carry workpieces, which can be implemented with a box or pallet structure. Ball bearings 212 can be provided at both ends of the circumference of the roller 211. The edge of the guide groove 110 can be chamfered, and the ball bearing 212 can slide along the chamfered edge to contact the inner wall of the guide groove 110, thereby facilitating the loading and unloading of the load-bearing roller 210.

[0043] The drive module 300 can be a magnetic drive module, which includes a stator 310 and a mover 320. The stator 310 is fixed, and the mover 320 is connected to the conveyor trolley 200. The magnetic field of the stator 310 drives the mover 320, thereby driving the conveyor trolley 200 to move, avoiding interference of mechanical transmission on the structure of the roller 211.

[0044] The conveying device typically also includes a frame 500, which can be a metal frame or composite material structure, providing an installation platform. Specifically, when the drive module 300 uses a magnetic drive module, the stator 310 is mounted on the frame 500 for fixation, and the guide 100 can be connected to either the stator 310 or the frame 500. Of course, when the drive module 300 uses other structures, both the drive module 300 and the guide 100 can be mounted on the frame 500; this application does not limit this.

[0045] Furthermore, the mounting cavity can be an annular structure with the central axis of the roller 211 as its center, and multiple balls 212 are arranged circumferentially within the mounting cavity. The annular structure of the mounting cavity allows the balls 212 to be centrally symmetrically distributed around the axis of the roller 211. When the roller 211 moves along the guide groove 110, multiple adjacent balls 212 can simultaneously contact the inner wall of the guide groove 110, distributing the load to multiple contact points, reducing the wear of individual balls 212, and extending the service life of the guiding mechanism. This application does not limit the number of balls 212 in the mounting cavity, but it must ensure that when the load-bearing roller 210 rolls in the guide groove 110, at least one ball 212 is in contact with the inner wall of the guide groove 110, and that as the load-bearing roller 210 rolls, different balls 212 can be switched to contact the inner wall of the guide groove 110.

[0046] The ball bearing 212 can move within the mounting cavity. The annular structure of the mounting cavity allows the ball bearing 212 to roll circumferentially along the mounting groove 21111 within the mounting cavity to form a cycle. Specifically, when the roller 211 rolls, the front ball bearing 212 enters the guide groove 110 and contacts the inner wall of the guide groove 110, while the rear ball bearing 212 disengages from the guide groove 110 to form a cycle. This gives the ball bearing 212 group self-adaptability, enabling stable guiding function without relying on high-precision installation.

[0047] In some embodiments, such as Figures 3 to 5 As shown, the roller 211 includes a wheel body 2111 and a pressure plate 2112. The wheel body 2111 is the main structure that carries the balls 212, and the pressure plate 2112 is a detachable component covering the end face of the wheel body 2111. The axial end face of the wheel body 2111 has a mounting groove 21111, and a channel 21121 is formed on the pressure plate 2112. The pressure plate 2112 is detachably connected to the wheel body 2111 so that the channel 21121 and the mounting groove 21111 are positioned opposite each other to form a mounting cavity. When assembling the load-bearing roller 210, the balls 212 can be placed in the mounting groove 21111 first, and then the pressure plate 2112 can be fixed. When the wear of the balls 212 affects the movement of the conveyor trolley 200, the pressure plate 2112 can be removed and the balls 212 replaced.

[0048] Based on the above embodiments, when the mounting cavity is an annular structure with the central axis of the roller 211 as its axis, the mounting groove 21111 is an annular structure with the central axis of the wheel body 2111 as its axis. The pressure plate 2112 includes two pressure rings 2112a, both of which are connected to the wheel body 2111. The two pressure rings 2112a are concentrically arranged, and a channel 21121 is formed between them. This channel 21121 is also annular with the central axis of the wheel body 2111 as its axis. The two pressure rings 2112a are concentrically assembled to form the annular channel 21121. The width of the channel 21121 remains consistent at all circumferential positions, ensuring that the dimensions of the protruding portions of each ball 212 are uniform.

[0049] Understandably, the mounting groove 21111 and the two pressure rings 2112a should be coaxially arranged. Specifically, the coaxiality between the outer edge of the inner pressure ring 2112a and the mounting groove 21111, and the coaxiality between the inner edge of the outer pressure ring 2112a and the mounting groove 21111 should be kept within a preset range, thereby defining a relatively uniform channel 21121 between the two pressure rings 2112a.

[0050] To ensure the coaxiality of the mounting groove 21111 and the two pressure rings 2112a, a positioning groove can be opened on the axial end face of the wheel body 2111, and a positioning protrusion can be set on the pressure ring 2112a. The positioning protrusion and the positioning groove correspond one-to-one to improve the positional accuracy of the pressure ring 2112a after installation.

[0051] Based on the above embodiments, such as Figures 3 to 5 As shown, the pressure ring 2112a is connected to the wheel body 2111 via a fastener 400. The fastener 400 is the connecting component used to fix the pressure ring 2112a and the wheel body 2111, and can be implemented using bolts or screws, achieving a detachable connection through threaded engagement. The pressure ring 2112a has a countersunk hole on the side facing away from the wheel body 2111. The countersunk hole is a recessed structure on the back of the pressure ring 2112a with a depth greater than the height of the end of the fastener 400. It can be implemented using a stepped hole or a tapered hole, used to completely accommodate the end of the fastener 400, preventing the end of the fastener 400 from protruding from the outer surface of the pressure ring 2112a. During the movement of the conveyor trolley 200, when the ball 212 contacts the inner wall of the guide groove 110, the countersunk hole structure prevents friction between the end of the fastener 400 and the inner wall of the guide groove 110, thereby reducing movement resistance.

[0052] Understandably, such as Figures 5 to 7As shown, the pressure ring 2112a needs to have a certain circumferential thickness so that the countersunk hole formed can completely accommodate the end of the fastener 400. Based on the above, the inner wall of the channel 21121 includes two stop edges 21122 arranged radially opposite to each other along the wheel body 2111. That is, the outer edge of the inner pressure ring 2112a has a stop edge 21122, and the inner edge of the outer pressure ring 2112a has a stop edge 21122. The two stop edges 21122 approach each other in the direction away from the mounting groove 21111, and the side edge of the stop edge 21122 away from the mounting groove 21111 is used to contact the ball 212, thereby generating mechanical constraint and restricting the ball 212 from moving axially. With the diameter of the ball 212 fixed, the width of the channel 21121 between the two pressure rings 2112a can determine the total size of the ball 212 within the channel 21121 and the extended portion. In this embodiment, by setting a gradually narrowing stop edge 21122, the contact edge between the pressure ring 2112a and the ball 212 is moved from the side of the pressure ring 2112a closer to the wheel body 2111 to the edge of the stop edge 21122 away from the wheel body 2111, thereby eliminating the influence of the thickness of the pressure ring 2112a on the extended size of the ball 212.

[0053] Furthermore, when assembling the load-bearing wheel 210, the ball bearing 212 is placed in the mounting groove 21111. The ball bearing 212 can automatically align around the mounting groove 21111. When installing the pressure ring 2112a, if the pressure ring 2112a is offset, the ball bearing 212 can contact the stop edge 21122 to guide the pressure ring 2112a to move and center it, thereby improving the positional accuracy of the pressure ring 2112a after installation.

[0054] like Figure 3 , Figure 5 and Figure 6 As shown, the load-bearing wheel 210 also includes a pivot 213, with the roller 211 sleeved around the pivot 213. A bearing 214 is provided between the wheel body 2111 and the pivot 213. The pivot 213 is a rigid shaft used to support the rotation of the roller 211. It can be made of metal and machined into a cylindrical structure. The two ends of the pivot 213 are connected to the conveyor trolley 200 to form a stable support frame. The bearing 214 is a rolling element set between the wheel body 2111 and the pivot 213. It can be a deep groove ball bearing 214 or a tapered roller bearing 214. Low-friction relative motion is achieved through the rolling elements between the inner and outer rings, allowing the wheel body 2111 to rotate freely around the pivot 213.

[0055] like Figure 6As shown, the pressure plate 2112 has a clearance hole 21123, the projection area of ​​the clearance hole 21123 on the wheel body 2111 along the axial direction of the wheel body 2111 completely covers the bearing 214. The clearance hole 21123 refers to the hole structure opened on the pressure plate 2112, which can be implemented by using an annular hole or a partial notch structure, and its size and shape are determined according to the axial projection range of the bearing 214. When the pressure plate 2112 is composed of two pressure rings 2112a, the clearance hole 21123 is the hollow part of the inner pressure ring 2112a. The clearance hole 21123 can prevent the pressure plate 2112 and the bearing 214 from contacting or interfering in the axial space, that is, the bearing 214 and the pivot 213 can be directly disassembled, installed, and adjusted through the clearance hole.

[0056] like Figure 6 As shown, the wheel body 2111 has a through hole 21112 extending along the axial direction. The wheel body 2111 includes a dividing step 21113 disposed in the through hole 21112. The dividing step 21113 refers to an annular protrusion structure disposed on the inner wall of the through hole 21112. Specifically, it can be achieved by turning to form a stepped dividing surface. The dividing step 21113 divides the through hole 21112 into two opposite mounting areas. Each mounting area is provided with a bearing 214, so that a double-point support structure is formed between the pivot 213 and the wheel body 2111 to avoid stress concentration. The double-point support can also effectively constrain the radial and axial displacement of the pivot 213 and reduce the vibration during the movement of the conveyor trolley 200.

[0057] In some specific embodiments, the cross-sectional shape of the separating step 21113 can be a right-angled step or a tapered transition structure, for example, using a 45° chamfer design to reduce stress concentration. The bearing 214 can be installed by interference fit or snap ring fixing, for example, by providing a slot at the end of the mounting area to fix the outer ring of the bearing 214.

[0058] like Figure 1 and Figure 8 As shown, the conveying trolley 200 includes a body 220 and a mounting base 230. The mounting base 230 is rotatably connected to the body 220 in the vertical direction, and a pivot 213 is connected to the mounting base 230. The pivot 213 is circumferentially arranged in the horizontal direction. The vertical rotatable connection means that the mounting base 230 and the body 220 form a rotating pair that rotates around a vertical axis. This can be achieved using a hinge structure or a bearing 214 structure, allowing the mounting base 230 to be finely adjusted around the vertical axis. The circumferentially horizontal arrangement of the pivot 213 means that the axis of the pivot 213 is parallel to the horizontal plane. This can be achieved through the horizontal positioning structure of the mounting base 230, ensuring that the rolling plane of the roller 211 is orthogonal to the extension direction of the guide groove 110.

[0059] Mounting base 230 can adaptively rotate around its vertical axis, causing pivot 213 to adjust its horizontal circumferential orientation, so that the axis of pivot 213 automatically remains perpendicular to the extension direction of guide groove 110. The rolling plane of roller 211 within guide groove 110 is always orthogonal to the movement trajectory of conveyor trolley 200, and the contact surface between ball bearing 212 and the inner wall of guide groove 110 maintains a uniform force. This rotating connection structure compensates for the installation error of pivot 213 by releasing vertical degrees of freedom, while maintaining the contact stability between roller 211 and guide groove 110 through horizontal circumferential constraints.

[0060] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A conveying device, characterized in that, include: Guide component, with guide groove; A conveying trolley is used to carry workpieces. The conveying trolley is equipped with load-bearing wheels, which include rollers and balls. The rollers have mounting cavities, and the axial end faces of the rollers have channels communicating with the mounting cavities. The balls are disposed in the mounting cavities, and a portion of the ball structure extends out of the channel. A portion of the roller structure is located in the guide groove, and the balls are in contact with the inner wall of the guide groove. A drive module is used to drive the conveying trolley to move along the extension direction of the guide trough.

2. The conveying device according to claim 1, characterized in that, The mounting cavity is an annular structure with the central axis of the roller as its center, and a plurality of the roller balls are arranged in the mounting cavity along the circumference of the mounting cavity.

3. The conveying device according to claim 1, characterized in that, The roller includes a wheel body and a pressure plate. The axial end face of the wheel body is provided with a mounting groove. The channel is formed in the pressure plate. The pressure plate is detachably connected to the wheel body so that the channel is arranged opposite to the mounting groove and forms the mounting cavity.

4. The conveying device according to claim 3, characterized in that, The mounting groove is an annular structure with the central axis of the wheel body as the axis. The pressure plate includes two pressure rings, both of which are connected to the wheel body. The two pressure rings are concentrically arranged and form an annular channel between them.

5. The conveying device according to claim 4, characterized in that, The pressure ring is connected to the wheel body by a fastener. The side of the pressure ring opposite to the wheel body has a countersunk hole for receiving the end of the fastener.

6. The conveying device according to claim 4, characterized in that, The inner wall of the channel includes two stop edges arranged radially opposite to each other along the wheel body. The two stop edges approach each other in a direction away from the mounting groove, and the side edge of the stop edge away from the mounting groove is used to contact the ball to limit the ball along the axial direction of the wheel body.

7. The conveying device according to claim 3, characterized in that, The load-bearing wheel also includes a pivot, the roller is sleeved outside the pivot, and a bearing is provided between the wheel body and the pivot.

8. The conveying device according to claim 7, characterized in that, The pressure plate has clearance holes, and the projection area of ​​the clearance holes on the wheel body along the axial direction of the wheel body completely covers the bearing.

9. The conveying device according to claim 7, characterized in that, The wheel body has a through hole extending along the axial direction. The wheel body includes a partition step disposed in the through hole. The partition step divides the through hole into two mounting areas arranged opposite to each other. Each mounting area is provided with the bearing.

10. The conveying device according to claim 7, characterized in that, The conveying trolley includes a body and a mounting base. The mounting base is rotatably connected to the body in a vertical direction. The pivot is connected to the mounting base, and the circumferential direction of the pivot is arranged in a horizontal direction.

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