Train wheel conveyor

Abstract

The application discloses a train wheel conveying device, which has the basic structure including a support, a track, a guide device, a plurality of star-shaped poking rod assemblies, three poking rods of each star-shaped poking rod assembly being arranged in the circumferential direction of the central part, the distance L between the top circles of adjacent star-shaped poking rod assemblies being 1 / 3-2piD, D being the diameter of the top circle, the angle difference of adjacent star-shaped poking rod assemblies being theta=60°+3r*60° / piD, wherein r=MOD(piD / 3, L), s being the estimated delay amount of the train wheel in the distance L due to deceleration, and a driving device for driving the plurality of star-shaped poking rod assemblies to rotate synchronously. The train wheel conveying device according to the application has high conveying precision and relatively stable conveying process.

Description

Technical Field

[0001] This invention relates to a train wheel conveying device. Background Technology

[0002] Train wheels are rotating components that bear loads between railway tracks and locomotive axles. Currently, they are mainly made of cast steel or rolled steel, and both require multiple manufacturing processes. Given the relatively large weight of train wheels (a single wheel typically weighs 306 kg or more, with some reaching 800 kg), the movement of train wheels between different workstations is relatively challenging. Furthermore, because each process has different requirements for the train wheel's posture, the transported train wheels must be suitable for rapid posture adjustment.

[0003] Given the significant weight of train wheels, conveyor belts are difficult to use for transport. Currently, a limited number of train wheels are transported using trolleys, each equipped with a single axle. During loading, workers hang several train wheels on a lifting device and then thread them onto the axle. Once the trolley reaches its destination unloading position, workers use the lifting device to remove the train wheels one by one. Since the main area available for lifting is the wheel hub, the axle must be significantly smaller than the hub, resulting in insufficient stability during transport, especially when the axle is positioned high, causing the trolley's center of gravity to be too high under load. Therefore, currently, train wheel transport primarily relies on small forklifts with a load capacity of less than 3.5 tons for easy movement within the workshop, but typically only a few, or even just one, can be transported at a time.

[0004] In some implementations, train wheels are transported via catenary systems. As mentioned earlier, train wheels have a relatively large weight, placing high demands on the suspension capacity of the catenary. Train wheels exhibit significant inertia when transported on the catenary. When stopped, the train wheels swing considerably on the hooks of the catenary, which significantly affects loading and unloading, and thus poses certain safety hazards. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a train wheel conveying device with high conveying accuracy and relatively stable conveying process.

[0006] In an embodiment of the present invention, a train wheel conveying device is provided, the basic structure of which includes:

[0007] support;

[0008] The track is mounted horizontally on the bracket and extends longitudinally along the bracket;

[0009] The guide device, located on supports on both sides above the track and set parallel to the track, is used to guide the middle and / or upper part of the train wheels;

[0010] Multiple star-shaped feed lever assemblies, each star-shaped feed lever assembly having a central part and three feed levers extending radially from the central part, the three feed levers being evenly placed circumferentially at the central part; the star-shaped feed lever assemblies are rotatably mounted on a bracket, the corresponding rotation axis being perpendicular to the extension direction of the track and located below the track, the distance between the rotation axis and the track surface being less than the length from the rotation axis to the end of the feed lever; the distance L between the top circles of adjacent star-shaped feed lever assemblies is 1 / 3 to 2πD, where D is the diameter of the top circle; the angle difference between adjacent star-shaped feed lever assemblies is θ = 60° + 3r * 60° / πD, where r = MOD(πD / 3, L), and s is the estimated hysteresis of the train wheel due to deceleration within the distance L;

[0011] A drive unit is used to drive multiple star-shaped feed bar assemblies to rotate synchronously.

[0012] Optionally, L is less than or equal to 2πD / 3.

[0013] Optionally, the feeding rod is located on the side of the train wheel away from the wheel flange, and the end of the feeding rod is provided with a roller that extends toward the side where the train wheel is located. This roller is the part of the feeding rod that contacts the train wheel.

[0014] Optionally, the roller is a rubber-coated roller.

[0015] Optionally, the driving device is:

[0016] The first option is a synchronous transmission system sharing a single power unit; or

[0017] The second option is that each star-shaped feed bar assembly is equipped with an independent power unit, and the power units are synchronized electrically.

[0018] Optionally, the contact point between the end of the feed lever and the train wheel is the lower half of the train wheel.

[0019] Optionally, the track is a cylindrical track.

[0020] Optionally, the guide device is equipped with a lifting mechanism to adjust the position of the guide device in relation to the train wheel according to the size specifications of the train wheel.

[0021] Optionally, the track has multiple segments, and the number of segments of the guide device is the same as the number of segments of the track;

[0022] Accordingly, the support has multiple segments, and the number of segments of the support is the same as the number of segments of the track;

[0023] There is an expansion gap between adjacent tracks; there is a gap between adjacent guide devices to avoid motion interference.

[0024] Optionally, the guide device includes a skeleton beam, which is arranged parallel to the track and located on both sides above the track;

[0025] The side of the frame beam facing the train wheel provides a guide surface, on which a sliding plate or smooth strip is installed.

[0026] It should be understood that when a train wheel loses power while running on a track, its speed decreases relatively slowly due to rolling friction. Therefore, in this embodiment of the invention, a star-shaped guide bar is used to sequentially move the train wheel forward. Furthermore, during the process of the star-shaped guide bar moving the train wheel, the sides of the train wheel are guided by a guide device, thus ensuring the stability of the conveying process. Simultaneously, because the star-shaped guide bar uses a three-bar structure, based on reasonable spacing, the train wheel can be conveyed smoothly and at a relatively uniform speed. When the star-shaped guide bar assembly stops running, at least one guide bar of each star-shaped guide bar is in a blocking state against the train wheel, forming an obstruction, and the stopping is relatively precise. Attached Figure Description

[0027] Figure 1 This is a diagram showing the state of a train wheel conveying device conveying a train wheel in one embodiment.

[0028] Figure 2 In response to Figure 1 A schematic diagram of the left-side view structure.

[0029] Figure 3 for Figure 2 Enlarged view of part A.

[0030] Figure 4 for Figure 2 Enlarged view of part B.

[0031] Figure 5 for Figure 2 Enlarged view of part C.

[0032] Figure 6 In response to Figure 1 A schematic diagram of the main structure.

[0033] Figure 7 for Figure 6 Enlarged view of part D.

[0034] Figure 8 This is a layout diagram of a star-shaped feed bar in one embodiment.

[0035] In the diagram: 1. Seat plate, 2. Reinforcing plate, 3. Column, 4. Crossbeam, 5. Main guide rail, 6. Motor, 7. Reducer, 8. Train wheel, 9. Guide device, 10. Vertical guide rail, 11. U-shaped frame, 12. Motor, 13. Gantry frame, 14. Connecting assembly, 15. Lead screw, 16. Star-shaped material-pulling rod, 17. Longitudinal beam, 18. Lower support, 19. Hanging rod, 20. Pin, 21. Fish mouth, 22. Foundation, 23. Slide plate, 24. Mounting beam, 25. Support plate, 26. Cylindrical guide rail, 27. Material-pulling rod, 28. Roller, 29. Clearance. Detailed Implementation

[0036] It should be understood that in the technical field of conveying equipment, there are definite front, back, left and right directions. Generally, the direction in which the conveyor travels is considered front, and the opposite direction is considered back. The front and back directions are also called longitudinal directions and are used to determine the length, corresponding to the longitudinal direction.

[0037] The two sides of the direction of travel are the left and right directions, also known as the lateral direction, and are used to determine the width, corresponding to the width direction.

[0038] The horizontal and vertical directions define the reference plane. This reference plane is not necessarily a horizontal plane, but the direction perpendicular to the reference plane can be called the vertical direction, corresponding to the height direction.

[0039] Figure 1 The structure of one example of a train wheel conveying device is firstly a support frame, in which... Figure 1 The support includes columns 3, crossbeams 4, and longitudinal beams 17. The support in the figure has three sections. Depending on the conveying distance, more or fewer sections can be configured. The purpose of using sections is, for example, for the guide device 9. In the preferred embodiment of the present invention, the guide device 9 can be adjusted according to the size specifications of the train wheel 8. In other words, the guide device 9 should be adjustable. If the span is relatively large, the difficulty of adjusting the guide device 9 will increase. Therefore, using sections is beneficial for adjusting, for example, the guide device 9.

[0040] In addition, beams and other structures will undergo thermal expansion and contraction due to factors such as ambient temperature. Figure 7 As shown, there is space between the two bracket segments, and a gap 29 is left between the corresponding main rails 5 to serve as an expansion joint. This prevents the main rails 5 from undergoing lateral deformation when thermal expansion and contraction occur, i.e., stress bending does not occur.

[0041] The support bracket raises the main rail 5 to a certain height to facilitate the movement of the train wheels 8, such as loading and unloading materials. The height also facilitates loading materials onto the workbench at the workstation.

[0042] Figure 2In the middle, on both sides of the position indicated by part C, the column 3 includes two parts, the lower part corresponds to the lower bracket 18, and the upper part corresponds to the upper bracket. During manufacturing, the lower bracket 18 and the components installed on the lower bracket 18 can be manufactured first, which helps to reduce interference during assembly.

[0043] In addition, such as Figure 1 As shown, the support frame comprises multiple segments in the longitudinal direction, each segment having its own upright column 3. The bottom of each upright column 3 has a base plate 1, which connects two horizontal upright columns 3. Using the base plate 1 as the design and installation reference makes it easier to ensure the overall assembly accuracy of the support frame. In particular, the support frame structure, aided by the base plate 1, can be completed at the factory, achieving higher assembly accuracy than installing each upright column 3 individually on-site.

[0044] Figure 1 In the bracket system, column 3 serves as the main mounting base. Both longitudinal beam 17 and transverse beam 4 can directly use column 3 as their mounting base, and they can also serve as mounting bases for each other. The system composed of longitudinal beam 17 and transverse beam 4 has good structural reliability.

[0045] exist Figure 1 In the frame formed by column 3 and longitudinal beam 17, additional bracing, such as diagonal bracing, can be installed to improve overall rigidity.

[0046] In addition, each support segment includes three sets of columns 3, with roughly the space of two train wheels 8, which limits the length of each support segment to be not excessive, making it easier to adjust according to site requirements.

[0047] As can be seen from the above, the support structure is formed by the assembly of columns 3, crossbeams 4, and longitudinal beams 17 into a rigid support, and... Figure 1 and Figure 2 In the middle, the space above the main rail 5 needs to be reserved for the passage of the train wheels 8. Crossbeams 4 should not be placed in this part. At least at the location of the main rail 5, more crossbeams 4 can be placed to play the main functional load-bearing role.

[0048] Regarding the main guide rail 5, it provides the track surface for the train wheel 8. Traditional train track surfaces are generally flat, while the train wheel 8 has a relatively large flange to engage with the inner side of the track to create a limiting effect and prevent derailment. There is often a rounded transition between the flange and the wheel body, and the upper inner edge of the train track often also has a matching rounded transition to facilitate, for example, casting or forging, and to suit the fit between the train wheel 8 and the train track.

[0049] exist Figure 1 In the illustrated structure, the main guide rail 5 can be a conventional rail adapted to the train wheel 8, and the corresponding single guide rail component can be directly selected.

[0050] The upper surface of traditional guide rail components is relatively wide, making it easy for some debris to fall on it. Although the train wheel 8 itself has a high degree of hardness, relatively soft debris is not enough to affect the train wheel 8. However, there may be various debris in the workshop, including some debris with higher hardness, such as corundum and steel shot used for shot blasting. If these debris fall on the upper surface of the guide rail components, they may scratch the surface of the train wheel 8.

[0051] In view of this, in a preferred embodiment, the guide surface provided by the main guide rail 5 can be a cylindrical surface.

[0052] It should be noted that when people describe a cylindrical surface, they do not mean a complete cylindrical surface, but rather a semi-cylindrical surface or the side surface of a cylinder with a central angle of less than 180 degrees.

[0053] For example, a semi-cylinder can have its cross-section as a mounting surface. This mounting surface is horizontal and has a large mounting area, while the side surface of the semi-cylinder is the cylindrical surface, which serves as the track surface.

[0054] Because cylindrical surfaces are not conducive to the accumulation of debris, especially particulate matter, it is difficult for particulate matter to remain stationary on the cylindrical surface. That is, after particulate matter falls onto the cylindrical surface, it will either bounce and fall directly, or even if it falls onto the upper generatrix of the cylindrical surface, it will roll off due to instability.

[0055] See Figure 5 , Figure 5 In the middle, the main guide rail adopts a cylindrical guide rail 26. The cylindrical guide rail 26 can be a semi-circular main guide rail, that is, the cylindrical guide rail 26 is divided into two parts in the middle, and the cross-sectional plane is used as the mounting surface. It can be installed on the support by means of welding, for example.

[0056] exist Figure 5 The illustrated structure includes a support plate 25 for supporting the cylindrical guide rail 26 at a certain height to suspend the train wheel 8 and prevent the train wheel 8 from interfering with the main guide rail 5 and its auxiliary structures.

[0057] If the cylindrical guide rail 26 is cylindrical in shape, then the upper surface of the bracket plate 25 can be provided with an arc groove or a V-groove to facilitate the positioning of the cylindrical guide rail 26 on the bracket plate 25 and to provide a relatively large contact area for relatively reliable fixing.

[0058] As mentioned earlier, since the train wheel 8 has a relatively large self-weight, in order to ensure that the main guide rail 5 has a relatively large rigidity, the main guide rail 5 itself is made of a material with high rigidity, such as a steel column.

[0059] On the other hand, it provides reliable support for the main track 5.

[0060] Among them, for example, vertically set up Figure 5The support plate 25 shown can have a relatively large bending section modulus in the vertical direction.

[0061] Furthermore, an installation beam 24 is provided on the lower side of the support plate 25 to further increase the overall rigidity of the main guide rail assembly.

[0062] The installation beam 24 can be a channel steel component or a rectangular tube component with a rectangular cross section. If it is a channel steel component, a flat plate can be welded at the groove.

[0063] The cylindrical guide rail fits into the inner side of the 8th wheel flange of the train wheel, and the contour of the inner side of the 8th wheel flange allows for a good fit.

[0064] In contrast, a single track component typically cannot provide sufficient support for the running train wheel 8 to prevent it from becoming unstable. Therefore, the train wheel conveying device is also equipped with a guiding device to provide auxiliary guidance by means of the guiding device 9, provided, for example, the main track 5 provides support and guidance.

[0065] It should be understood that the higher the component preventing instability is installed, the less force it will bear. Therefore, the guide device 9 should be located at least above the main guide rail 5. Obviously, in order to meet the mechanical guidance requirements, the guide device 9 should not be higher than the upper generatrix of the train wheel 8. Generally, it is more appropriate to be at two-thirds of the height of the train wheel 8.

[0066] The guide device 9 generally has a certain width, which is reflected in Figure 4 In the structure shown, for example, the guide mask provided by the skateboard 23 has a certain height; therefore, the two-thirds height mentioned is not an exact value. Generally speaking, taking the height direction as a reference, for example, the centerline of the skateboard 23 is approximately located at two-thirds the height of the train wheel 8, and some deviation will not affect the use of the guide device 9.

[0067] Therefore, as an optional range, the centerline of the guide device 9 can be located at a height of two-thirds to four-fifths of the train wheel 8.

[0068] To achieve the best guiding effect, the position of the guide device 9 adapted to different train wheels 8 can be determined, with the height of the train wheel 8 as the design benchmark. The position of the guide device 9 can be adjusted manually according to the current batch of train wheels 8, or the equipment can automatically complete the corresponding adjustment. The prerequisite is that the guide device 9 should be adjustable in the vertical direction of the bracket.

[0069] Please refer to the instruction manual for details. Figure 1 , 2In Figure 4, the main body of the support consists of two support panels, which are primarily composed of columns 3 and longitudinal beams 17. On the inner side of each support panel, that is, on the side where the two support panels face each other, a vertical guide rail 10 is provided. The guiding device 9 is guided vertically by the vertical guide rail 10, meaning the guiding device 9 has vertical freedom thanks to the vertical guide rail 10. Without other mechanisms or limiting devices, the guiding device 9 will fall freely.

[0070] Furthermore, the guide device 9 is as follows Figure 1 , 2 The lead screw 15 shown in Figure 3 is suspended from the lead screw 15, which is mounted on the lead screw nut assembly as shown in Figure 3. Figure 1 and 2 The gantry 13 shown is mounted on the top of the support frame. Each support segment has a pair of gantry 13s, with one at each end of the corresponding support segment, for lifting the guide device 9.

[0071] When adjustments are needed, manually turning the screw nut in the lead screw pair, for example, can drive the lead screw 15 to move up and down.

[0072] The difficulty in manual adjustment lies in controlling the synchronization of multiple lead screw and nut pairs. Therefore, in a preferred embodiment, an electric drive is used, for example. Figure 1 In the middle, a motor 12 is provided on one side of the gantry frame 13. The motor 12 can be connected to the lead screw and nut pair by a gear mechanism. For example, the lead screw nut is engaged with a gear ring, which meshes with the output gear of the motor 12.

[0073] To achieve precise adjustment, the motor 12 can be, for example, a servo motor or a stepper motor.

[0074] Regarding adjustments, since they are not frequent, they are usually made for the size specifications of the current batch of train wheels 8. Such adjustments are even rare when the size specifications of multiple batches of train wheels 8 are exactly the same. Therefore, even if the adjustment is made electrically, the stroke of the lead screw 15 can be controlled by manually operating the button, thereby controlling the lifting and lowering of the guide device 9.

[0075] However, it should be noted that some manufacturers have a wide variety of train wheels 8, which may require processing multiple batches per day. Even so, the adjustment frequency of the guide device 9 is still not high. If the adjustment frequency of the guide device 9 is relatively higher, automatic adjustment can be considered. For example, a grating ruler can be installed on the bracket to detect the height of the train wheel 8 passing through the grating ruler, thereby adjusting the height of the guide device 9.

[0076] Figure 2The left and right directions are consistent with the left and right directions of the train wheel conveying device. As can be seen in the figure, the guide devices 9 on the left and right sides are connected into an assembly by a pair of U-shaped frames 11. The U-shaped frame 11 is also called a portal frame, for example, the naming method of the gantry frame 13 in Figure 13 is the same.

[0077] The U-shaped frame 11 has a central passageway, which allows it to be straddled, providing a conveying channel for the train wheels 8 while allowing the two guide devices 9 to be suspended.

[0078] Combination Figure 2 and Figure 3 A hanging rod 19 is connected to the middle of the upper end of the U-shaped frame 11, and the upper end of the hanging rod 19 is mounted on a fish mouth 21 by a pin 20.

[0079] Fish Mouth 21 is actually a name for a U-shaped connector, which should be clearly understood by those skilled in the field of mechanics.

[0080] The upper part of the fish mouth 21 is a rod, and the connection between its upper end and the lower end of the lead screw 15 is preferably a live joint. For example, the fish mouth 21 and the lower end of the lead screw 15 can be assembled by a ball joint to reduce the influence of the additional torsional torque of the lead screw 15 on the guide device 9.

[0081] from Figure 4 It can be clearly seen that the distance between the two opposing guide devices 9 is greater than the thickness of the train wheel 8. In other words, in Figure 4 In the structure shown, the train wheel 8 can contact and be guided by a maximum of one guide device 9 at a time.

[0082] In some embodiments, each of the opposing guide devices 9 may have a slide plate 23 provided above and below the U-shaped frame 11. Under this condition, it is possible for two slide plates 23 to provide guidance at the same time.

[0083] Figure 4 In the U-shaped frame 11, there is a support platform 22 on the inner side to form a certain support height, and then a slide plate 23 is set on the platform 22. This support height is used to prevent the train wheels 8 from directly contacting the U-shaped frame 11.

[0084] The slide plate 23 can be made of, for example, nylon strips, or of, polytetrafluoroethylene (PTFE) sheets or modified PTFE sheets, or other materials with relatively low coefficients of friction, in order to obtain a relatively low coefficient of friction.

[0085] In some embodiments, the slide plate 23 may also be replaced by a flow strip, which provides rolling friction and has a relatively low coefficient of friction.

[0086] In addition, the flow strip is a finished product and can be purchased and installed directly.

[0087] The foregoing section described the lifting mechanism of the guide device 9. Since the guide device 9 needs to be lifted, its longitudinal span and individual weight must be considered. If the longitudinal span is large, the weight will also be relatively large, making lifting control more difficult. Furthermore, apart from the suspension points, the remaining parts are prone to bending deformation, affecting the guidance of the train wheels 8. Therefore, the segmented design mentioned earlier is also applicable to the guide device 9, used to reduce the weight of each segment and the longitudinal span, thus facilitating lifting control. Simultaneously, the segments of the guide device 9 are less prone to significant bending deformation due to their own weight.

[0088] Regarding automatic lifting, the aforementioned grating ruler is preferably installed on the inlet side of the train wheel conveyor. The grating ruler can also be replaced by, for example, a measuring light curtain. A measuring light curtain is actually an assembly derived from the installation of a light curtain, and it uses one or more sets of sensors for measurement. Since measuring light curtains are common components in the mechanical field, they will not be described in detail here.

[0089] The above describes the travel track of the train wheel 8, namely the main guide rail 5, and the guiding part, namely the guiding device 9. The following describes the part that propels the train wheel 8. In this embodiment of the invention, a star-shaped feed lever assembly is used to propel the train wheel 8. One side of the feed lever 27 on the star-shaped feed lever assembly is the force-receiving side, and the other side is the force-applying side, as shown below. Figure 8 As shown, each star-shaped material guide rod 16 is equipped with three material guide rods 27. When the star-shaped material guide rod 16 rotates, the front side corresponding to its rotation direction is the force-applying side of the material guide rod 27, that is, the side used to push the train wheel 8. When the train wheel 8 arrives, the back side of the material guide rod 27 corresponding to the rotation direction of the star-shaped material guide rod 16 is resisted by the train wheel 8. If the star-shaped material guide rod 16 stops rotating, then the corresponding material guide rod 27 plays a blocking role, causing the train wheel 8 to gradually stop. This back side is the force-receiving side.

[0090] It should be understood that when the train wheel 8 is guided by the main guide rail 5 and assisted by the guide device 9, the coefficient of friction is very small due to rolling friction. Even if the train wheel 8 loses power, its deceleration will be very slow. In other words, if multiple star-shaped feed rod assemblies are provided, there can be a certain span between adjacent star-shaped feed rod assemblies without affecting the accurate conveying of the train wheel 8. At the same time, when the star-shaped feed rod assembly stops running, it will stop gradually rather than immediately. The star-shaped feed rod assembly and the train wheel 8 will gradually decelerate by using, for example, the resistance of the motor 6 and the reducer 7 used to drive the star-shaped feed rods. It should be understood that in the mechanical field, the deceleration distance is controllable.

[0091] However, the span should not be too large, otherwise the natural deceleration of the train wheel 8 will affect the sequential relay of the train wheel 8 between the multiple star-shaped feed rod assemblies that are driven synchronously.

[0092] Correspondingly, multiple star-shaped feed rod assemblies require relatively strict synchronous drive. This synchronous drive can be implemented through mechanical synchronization or electrical synchronization. The choice of synchronization method depends on the total length of the train wheel conveyor. If the total length is relatively large, electrical synchronization is preferred. If mechanical synchronization is used in this case, it will inevitably result in an excessively long transmission chain, low efficiency, and a relatively large cumulative error.

[0093] If the total length of the train wheel conveyor is relatively short, mechanical synchronization can be used. Mechanical synchronization has relatively good reliability and will not cause the entire system to fail to synchronize due to a problem in a single node of electrical synchronization. In contrast, mechanical synchronization is often mutually restrictive in traditional processes; a problem in one node may cause the entire system to stop operating, thus avoiding the problem of false synchronization.

[0094] See Figure 8 The star-shaped feed rod assemblies, arranged in pairs, can be driven synchronously using mechanisms such as synchronous belts or chains. Simultaneously, electrical synchronization can be used between the groups, meaning that synchronization can be achieved through a combination of mechanical and electrical synchronization.

[0095] Furthermore, considering various factors, the distance L between the top circles of adjacent star-shaped feed rod assemblies is 0~2πD, where D is the diameter of the top circle; the angle difference between adjacent star-shaped feed rod assemblies is θ=60°+3r*60° / πD+s, where r=MOD(πD / 3,L), and s is the estimated hysteresis of the train wheel due to deceleration within the distance L.

[0096] Regarding the so-called tip circle, it should be understood that in the mechanical field, such as with threads, the major diameter of the thread is actually the thread diameter corresponding to the peak value of the thread teeth. The same applies to gears; the tip circle of a gear is the distance from the top of the tooth profile to the gear axis, which is its tip circle radius.

[0097] like Figure 8 As shown, each star-shaped feed rod assembly has three feed rods 27 in its star-shaped feed rod 16. The three feed rods are spaced 120 degrees apart and are uniformly arranged around its rotation axis. Under this condition, the running path of the feed rod tip is the top circle of the star-shaped feed rod assembly.

[0098] MOD is a mathematical operator, namely the modulo operator, which represents the remainder operation. The part before the parentheses is the dividend, and the part after the parentheses is the divisor. It takes the integer part and takes the remainder.

[0099] Since each star-shaped feed lever 16 has three feed levers, and they are spaced 120 degrees apart, this is represented by one-third of the circumference of the top circle of the star-shaped feed lever 16, i.e., πD / 3. The assumption here is that within the aforementioned distance L, the train wheel 8, having lost power, still moves at a constant speed, but the train wheel 8 will inevitably decelerate. However, under rolling friction conditions, the deceleration is not significant, especially under the condition that the aforementioned distance L is relatively small.

[0100] However, since there is no strictly ideal situation in engineering, in order to ensure smooth connection between adjacent star-shaped feed rod assemblies, an adjustment coefficient, namely s, is introduced. This s is the estimated hysteresis of the train wheel due to deceleration within a distance L. It can be measured in advance according to factory conditions. Even if there is a deviation in s, a small deviation will have a relatively small impact because, for example, the part of the star-shaped feed rod assembly that directly contacts the train wheel 8 is the roller 28 installed at the end of the feed rod, which has a cylindrical profile surface.

[0101] Let's take a look at the specific structure of the star-shaped feed lever assembly, such as... Figure 8 As shown in the figure, the shape of the star-shaped feed rod assembly is displayed. Excluding the supporting part, it is the star-shaped feed rod 16, which has three feed rods 27 and a spoke in the middle. It is either directly welded or installed on a hub sleeve through other connection methods. Except for the end of the feed rod 27, reinforcing rods, reinforcing plates, etc. can be set between the feed rods 27 without mechanical contact with the train wheel 8.

[0102] The star-shaped feed rod 16 can be equipped with a spindle, in which case the spindle is a rotating shaft; the star-shaped feed rod 16 can also be equipped with a hub, which is mounted on a given spindle via bearings, in which case the spindle is a fixed shaft.

[0103] The hub sleeve can be connected to the gear ring to introduce power through the gear set. In the case where the main shaft is a rotating shaft, the main shaft can also be a gear shaft, introducing power through the gear on the shaft through, for example, the gear set.

[0104] It should be noted that the star-shaped feed rod 16 is mounted on the bracket by rotation and has a defined axis of rotation, which is obviously a horizontal line and perpendicular to the main guide rail 5.

[0105] To avoid positional interference, the slewing axis is located below the track surface of the main guide rail 5. However, the distance between the slewing axis and the track surface of the main guide rail 5 is less than the length from the slewing axis to the end of the feed lever. Only under these conditions can power be applied to the train wheel 8.

[0106] Implicitly, the end of the feed lever can engage with the train wheel 8 when it reaches the predetermined position.

[0107] Figure 5In the middle, the material-pulling rod 27 is located on the side of the train wheel 8 away from the wheel flange. The end of the material-pulling rod 27 is provided with a roller 28. The axis of the roller 28 is parallel to the axis of the train wheel 8. It is offset towards the side where the train wheel 8 is located in a cantilevered manner and extends into the running channel of the train wheel 8. Thus, with the help of the roller 28, the material-pulling rod 27 and the train wheel 8 generate drive or block.

[0108] Obviously, without interfering with the motion of the main guide rail 5, the feed lever 27 can also directly interact with the train wheel 8, such as... Figure 5 As shown in the figure, the train wheel 8 has a relatively large thickness, which is sufficient to allow the feed lever 27 to give way to the main guide rail 5 and its mounting structure.

[0109] Furthermore, in order to improve the smoothness of the train wheel 8 driving multiple star-shaped feed rod assemblies in sequence, the distance L is less than or equal to 2πD / 3, at which point the deceleration of the train wheel 8 is relatively small.

[0110] However, the distance L should not be too small, and should generally not be less than 1 / 3πD.

[0111] The roller 28 is a rubber-coated roller to avoid mechanical scratches on the train wheel 8. At the same time, the rubber coating on the roller 28 provides relatively large friction, which is beneficial for the roller 28 to move.

[0112] from Figure 2 As can be seen, the contact position between the end of the feeding rod 27 and the train wheel 8 is the lower half of the train wheel 8, provided that the shaft of the star-shaped feeding rod assembly is located below the main guide rail 5. If the feeding rod 27 is too long, the spacing design of the star-shaped feeding rod assembly will be greatly affected. Furthermore, if the contact position between the end of the feeding rod 27 and the train wheel 8 is the upper half of the train wheel, an additional downward pressure component will be generated, which may even make the friction of the train wheel greater than the dynamic component of the main guide rail 5 applied by the feeding rod 27.

Claims

1. A train wheel conveying device, characterized in that, include: support; The rails are mounted horizontally on the support and extend longitudinally along the support to provide support for the train wheels; The guide device, located on supports on both sides above the track and set parallel to the track, is used to guide the middle and / or upper part of the train wheels; Multiple star-shaped lever assemblies are used to propel the train wheels. Each star-shaped lever assembly has a central part and three levers extending radially from the central part. The three levers are evenly distributed circumferentially around the central part. The star-shaped lever assemblies are rotatably mounted on a bracket. The corresponding rotation axis is perpendicular to the extension direction of the track and located below the track. The distance between the rotation axis and the track surface is less than the length from the rotation axis to the end of the lever. The distance L between the top circles of adjacent star-shaped lever assemblies is 1 / 3 to 2πD, where D is the diameter of the top circle. The angle difference between adjacent star-shaped lever assemblies is θ = 60° + 3r * 60° / πD - s, where r = MOD(πD / 3, L), and s is the estimated hysteresis of the train wheels due to deceleration within the distance L. A drive unit is used to drive multiple star-shaped feed bar assemblies to rotate synchronously.

2. The train wheel conveying device according to claim 1, characterized in that, The L is less than or equal to 2πD / 3.

3. The train wheel conveying device according to claim 1, characterized in that, The feeding rod is located on the side of the train wheel away from the wheel flange, and the end of the feeding rod is provided with a roller that extends toward the side where the train wheel is located. This roller is the part of the feeding rod that contacts the train wheel.

4. The train wheel conveying device according to claim 3, characterized in that, The roller is a rubber-coated roller.

5. The train wheel conveying device according to any one of claims 1 to 4, characterized in that, The driving device is: The first option is a synchronous transmission system sharing a single power unit; or The second option is that each star-shaped feed bar assembly is equipped with an independent power unit, and the power units are synchronized electrically.

6. The train wheel conveying device according to any one of claims 1 to 4, characterized in that, The contact point between the end of the feed lever and the train wheel is the lower half of the train wheel.

7. The train wheel conveying device according to claim 1, characterized in that, The track is a cylindrical track.

8. The train wheel conveying device according to claim 1, characterized in that, The guide device is equipped with a lifting mechanism to adjust the position of the guide device in relation to the train wheel according to the size and specifications of the train wheel.

9. The train wheel conveying device according to claim 8, characterized in that, The track has multiple segments, and the number of segments of the guide device is the same as the number of segments of the track; Accordingly, the support has multiple segments, and the number of segments of the support is the same as the number of segments of the track; There is an expansion gap between adjacent tracks; there is a gap between adjacent guide devices to avoid motion interference.

10. The train wheel conveying device according to claim 8, characterized in that, The guiding device includes a skeleton beam, which is arranged parallel to the track and located on both sides above the track; The side of the frame beam facing the train wheel provides a guide surface, on which a sliding plate or smooth strip is installed.

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