A wheel hub magnetic steel pressing guide device

Abstract

The utility model relates to a wheel hub magnetic steel pressing guide device, which includes: a positioning seat for positioning the wheel hub, a plug ring is provided on the positioning seat, and the plug ring can be inserted into the inner ring of the wheel hub; the top circumference of the plug ring is evenly distributed with M first guide grooves for guiding the magnetic steel in the horizontal direction, and the total number of magnetic steels provided on a wheel hub is defined as N, then M=N; the plug ring can support the magnetic steel in the vertical direction; a posture fixing mechanism, including a lifting drive and a posture fixing ring, the posture fixing ring is arranged directly above the positioning seat, and the lifting drive drives the posture fixing ring to move relative to the positioning seat; the bottom of the posture fixing ring is provided with a second guide groove corresponding to the first guide groove and used to guide the magnetic steel in the vertical direction; the first guide groove, the plug ring and the second guide groove cooperate to complete the positioning of the magnetic steel. The utility model can guide and position the magnetic steel in the process of pressing the magnetic steel to the inner ring of the wheel hub at one time, so as to ensure that the magnetic steel is accurately pressed into the wheel hub.

Description

Technical Field

[0001] The utility model relates to the technical field of hub motor assembly equipment, in particular to a hub magnetic steel pressing guide device. Background Art

[0002] In order to save equipment space, most electric bicycles are driven by hub motors. A large number of magnets need to be attached to the hubs. The installation of the magnets has a great impact on the performance and service life of the hub motors.

[0003] The applicant has developed a device (hereinafter referred to as the magnetic steel pressing device) that can assemble the magnet to the wheel hub at one time. The outer periphery of the magnetic steel pressing device is evenly distributed with a number of positioning pieces for positioning and grasping the magnetic steel, and the positioning pieces can be controllably extended and retracted. When all the positioning pieces have grasped the magnetic steel, all the positioning pieces shrink inward. At this time, the diameter of the circle formed by the magnetic steel is smaller than the inner diameter of the wheel hub. At this time, the magnetic steel pressing device is aligned with the wheel hub and can be inserted into the inner ring of the wheel hub. The magnetic steel will not be adsorbed to the wheel hub during the insertion process. When the magnetic steel pressing device is inserted into place, all the positioning pieces stretch outward synchronously, and the magnet can be pushed toward the inner ring of the wheel hub. Because the adsorption force between the positioning pieces and the magnetic steel is smaller than the adsorption force between the wheel hub and the magnetic steel, when all the positioning pieces shrink inward again, the magnet can be separated from the positioning pieces and adsorbed on the wheel hub, completing the one-time assembly of the magnet. The magnetic steel pressing device can be found in Figure 1 and Figure 2 However, in actual operation, when the magnet is pushed toward the wheel hub, due to the change in magnetic force, there is still a possibility that the magnet may be slightly tilted relative to the wheel hub.

[0004] It should be noted that the above-mentioned contents are for the purpose of helping readers better understand the background of the present invention, and it does not mean that the above-mentioned contents are the prior art. Utility Model Content

[0005] The utility model aims to provide a hub magnet pressing guide device, which can guide and position the magnet during the one-time pressing of the magnet onto the inner ring of the hub, thereby ensuring that the magnet is accurately pressed into the hub.

[0006] In order to achieve the above-mentioned purpose, the utility model discloses a hub magnetic steel pressing guide device, which comprises:

[0007] A positioning seat is used to position the wheel hub. The positioning seat is provided with an insert ring, which can be inserted into the inner ring of the wheel hub. The top circumference of the insert ring is evenly distributed with M first guide grooves for guiding the magnetic steel in the horizontal direction. The total number of magnetic steels provided on a wheel hub is defined as N, then M=N. The insert ring can support the magnetic steel in the vertical direction.

[0008] The posture fixing mechanism includes a lifting drive component and a posture fixing ring. The posture fixing ring is arranged directly above the positioning seat, and the lifting drive component drives the posture fixing ring to move relative to the positioning seat; the bottom of the posture fixing ring is provided with a second guide groove which corresponds to the first guide groove and is used to guide the magnetic steel in the vertical direction; the first guide groove, the plug ring and the second guide groove cooperate to complete the positioning of the magnetic steel.

[0009] Through the above arrangement, the wheel hub is first accurately positioned on the positioning seat to ensure the accuracy of the magnetic steel guidance. The magnetic steel pressing device can extend into the inner ring of the wheel hub through the positioning ring. When the magnetic steel pressing device presses the magnetic steel horizontally against the wheel hub, the magnetic steel is first guided through the first guide groove until the magnetic steel is attached to the wheel hub, and then the lifting drive drives the positioning ring to press down, and the upper end of the magnetic steel is inserted into the second guide groove. Because the lower end of the magnetic steel is supported by the insert ring, if the magnetic steel is skewed, it can also be corrected by the second guide groove. The first guide groove, the insert ring and the second guide groove cooperate to ensure that the magnetic steel is accurately positioned in the wheel hub.

[0010] Preferably, the first guide groove includes a first guide groove section and a first positioning groove section that are interconnected, the first guide groove section is arranged close to the inner ring of the insert ring, the first positioning groove section is arranged close to the outer ring of the insert ring, the groove width of the first guide groove section decreases from the inner ring to the outer ring of the insert ring, and the minimum groove width of the first guide groove section is equal to the groove width of the first positioning groove section, and the groove width of the first positioning groove section is adapted to the width of the magnetic steel. Through the above arrangement, when the magnetic steel is pushed toward the inner wall of the hub by the magnetic steel pressing device, the position of the magnetic steel can be guided to the first positioning groove section by the first guide groove section even if there is a certain deviation, so as to ensure that the magnetic steel can be initially positioned during the pressing process.

[0011] Preferably, the second guide groove includes a second guide groove section and a second positioning groove section which are interconnected, the second guide groove section is located below the second positioning groove section, the groove width of the second guide groove section decreases from bottom to top, and the minimum groove width of the second guide groove section is equal to the groove width of the second positioning groove section, and the groove width of the second positioning groove section is adapted to the width of the magnetic steel. Through the above arrangement, after the magnetic steel is attached to the wheel hub, if the position of the magnetic steel is deviated, it can also be guided to the second positioning groove section by the second guide groove section, so as to ensure that the magnetic steel attached to the wheel hub is repositioned.

[0012] Preferably, the insert ring is integrally formed on the positioning seat. The positioning seat structure provided in this way is simpler, and the positional relationship between the insert ring and the positioning seat is stable, which is conducive to ensuring the reliability of the guidance.

[0013] Preferably, the positioning seat is provided with a step surface for positioning the inner ring of the wheel hub. This arrangement can make the positioning of the wheel hub reliable and convenient.

[0014] Preferably, the positioning seat comprises a base and a tube body, and the step surface is arranged on the top outer side of the tube body. Such an arrangement can make the structure of the positioning seat simple, and the inner cavity of the tube body can also be used to avoid the magnetic steel pressing device.

[0015] Preferably, at least two in-place detection elements are further included to detect whether the wheel hub is placed stably on the positioning seat, and the in-place detection elements are evenly distributed on the positioning seat. With this arrangement, it is possible to accurately determine whether the wheel hub is placed stably to ensure that the magnet is accurately attached to the wheel hub.

[0016] Preferably, the in-position detection element is a micro switch. The micro switch has fast detection and high sensitivity, and can accurately determine whether the wheel hub is placed stably.

[0017] Preferably, the positioning seat and the positioning ring are made of non-magnetic hard materials. This arrangement can ensure that when the wheel hub with the magnetic steel assembled is unloaded, there will be no magnetic interference from parts other than the wheel hub, which is conducive to ensuring the position stability between the magnetic steel and the wheel hub.

[0018] Preferably, the part of the insert ring that supports the magnetic steel in the vertical direction is the bottom of the first positioning groove, and the bottoms of all the first positioning grooves are on the same horizontal plane. After such an arrangement, the structure of the positioning seat can be simpler, which is convenient for processing and manufacturing.

[0019] The utility model has the following beneficial effects:

[0020] The utility model firstly makes the wheel hub accurately positioned on the positioning seat to ensure the accuracy of the magnetic steel guidance. The magnetic steel pressing device can extend into the inner ring of the wheel hub through the positioning ring. When the magnetic steel pressing device presses the magnetic steel horizontally to the wheel hub, the magnetic steel is first guided by the first guide groove until the magnetic steel is attached to the wheel hub, and then the lifting drive member drives the positioning ring to press down, and the upper end of the magnetic steel is inserted into the second guide groove. Because the lower end of the magnetic steel is supported by the insert ring, if the magnetic steel is skewed, it can also be corrected by the second guide groove. The first guide groove, the insert ring and the second guide groove cooperate to ensure that the magnetic steel is accurately positioned in the wheel hub. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the magnetic pressing device (contracted state).

[0022] Figure 2 Schematic diagram of the magnetic pressing device (extended state).

[0023] Figure 3 This is a schematic diagram of the utility model (the lifting drive component is hidden).

[0024] Figure 4 It is a cross-sectional view of the utility model.

[0025] Figure 5 for Figure 4 A magnified schematic diagram of part A in FIG.

[0026] Figure 6 It is a cross-sectional view from another perspective of the utility model.

[0027] Figure 7 for Figure 6 An enlarged schematic diagram of part B in FIG.

[0028] Figure 8 A schematic diagram of the positioning seat.

[0029] Fig. 9 Schematic diagram of the attitude ring.

[0030] Main component symbols:

[0031] Magnetic steel 11, wheel hub 12, magnetic steel pressing device 13;

[0032] Positioning seat 20, base 21, tube body 22, step surface 23, in-position detection element 24, mounting groove 25, insert ring 26, first guide groove 27, first guide groove section 28, first positioning groove section 29;

[0033] The posture fixing ring 30 , the second guide groove 31 , the second guide groove section 32 , and the second positioning groove section 33 . DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0035] The utility model discloses a wheel hub magnetic steel pressing guide device, which is used to guide and position the magnetic steel 11 when the magnetic steel pressing device 13 presses the magnetic steel 11 against the wheel hub 12, so as to ensure that the magnetic steel 11 is accurately installed in the wheel hub 12. Figure 1 and 2 As shown, it can be inserted into the inner ring of the hub 12 and the magnet 11 can be pressed into the hub 12 at one time by means of horizontal expansion and contraction.

[0036] Specifically, Figures 3 to 9As shown, the wheel hub magnetic steel pressing guide device includes a positioning seat 20 and a posture fixing mechanism. The positioning seat 20 is used to position the wheel hub 12. The positioning seat 20 includes a base 21 and a tube body 22. The tube body 22 is connected to the base 21 by screw connection or welding. The setting of the base 21 can be conveniently coordinated with other equipment, such as the automatic feeding device of the wheel hub magnetic steel assembly production line. The inner cavity of the tube body 22 can be used to avoid the magnetic steel pressing device 13. A circle of step surfaces 23 for positioning the inner ring of the wheel hub 12 is provided on the outer side of the top of the tube body 22. The vertical surface of the step surface 23 presents a circle, and its diameter is adapted to the inner ring diameter of the wheel hub 12, that is, the vertical surface of the step surface 23 can be inserted into the inner ring of the wheel hub 12, and the plane of the step surface 23 can limit the insertion depth of the vertical surface of the step surface 23. Such a setting can make the positioning of the wheel hub 12 reliable and convenient. Reliably positioning the hub 12 is a prerequisite for ensuring that the magnetic steel pressing device 13 can smoothly press the magnetic steel 11 into its inner ring and ensure that the magnetic steel 11 is accurately assembled.

[0037] In order to accurately determine whether the wheel hub 12 is stably placed on the positioning seat 20, at least two in-place detection elements 24 are provided to detect whether the wheel hub 12 is stably placed on the positioning seat 20. The in-place detection elements 24 are evenly distributed on the positioning seat 20. A mounting groove 25 can be provided below the step surface 23 to install the in-place detection elements 24. The setting of the in-place detection elements 24 should not interfere with the placement of the wheel hub 12. In this case, the in-place detection element 24 is preferably a micro switch, which is small in size, fast in detection and highly sensitive. It is not easy to interfere with the placement of the wheel hub 12, and can also accurately determine whether the wheel hub 12 is stably placed. The micro switch can be used to control a signal light to intuitively feedback the placement of the wheel hub 12, or the micro switch is connected to a controller, and the micro switch sends a detection signal to the controller, and at the same time controls the magnetic steel pressing device 13 and the posture fixing mechanism through the controller.

[0038] An insert ring 26 is provided on the top of the tube body 22. Preferably, the insert ring 26 is integrally formed with the tube body 22 to facilitate the manufacture of the positioning seat 20, and the connection relationship between the insert ring 26 and the tube body 22 is more stable. The insert ring 26 can be inserted into the inner ring of the wheel hub 12, and preferably the outer wall of the insert ring 26 can fit the inner ring of the wheel hub 12. M first guide grooves 27 for guiding the magnetic steel 11 in the horizontal direction are evenly distributed on the top surface of the insert ring 26. The total number of magnetic steels 11 provided on a wheel hub 12 is defined as N (N is a positive integer), then M=N.

[0039] In order to ensure the guiding and positioning functions of the first guide groove 27, the following design is made: the first guide groove 27 is a symmetrical structure, which includes a first guide groove section 28 and a first positioning groove section 29 that are interconnected. The first guide groove section 28 is arranged near the inner ring of the insert ring 26, and the first positioning groove section 29 is arranged near the outer ring of the insert ring 26. The groove width of the first guide groove section 28 decreases from the inner ring to the outer ring of the insert ring 26, and the minimum groove width of the first guide groove section 28 is equal to the groove width of the first positioning groove section 29, and the groove width of the first positioning groove section 29 is adapted to the width of the magnetic steel 11. Through the above arrangement, when the magnetic steel 11 is pushed toward the inner wall of the wheel hub 12 by the magnetic steel pressing device 13, the position of the magnetic steel 11 can be guided to the first positioning groove section 29 by the wide-mouthed first guide groove section 28 even if there is a certain deviation, so as to ensure that the magnetic steel 11 can be initially positioned during the pressing process. The bottom of the first positioning groove can support the part of the magnetic steel 11 in the vertical direction, and the bottoms of all the first positioning grooves are on the same horizontal plane.

[0040] The posture mechanism includes a lifting drive and a posture ring 30. The posture ring 30 is arranged directly above the positioning seat 20. The lifting drive drives the posture ring 30 to move relative to the positioning seat 20. The lifting drive can be a cylinder, or a linear motion module based on a cylinder or a motor. The linear motion module is a prior art and will not be described in detail. A second guide groove 31 corresponding to the first guide groove 27 and used to guide the magnetic steel 11 in the vertical direction is provided at the bottom of the posture ring 30.

[0041] After the magnet 11 is attached to the wheel hub 12, the second guide groove 31 cooperates with the first guide groove 27 to complete the positioning of the magnet 11. In order to ensure the guiding and positioning function of the second guide groove 31, it is designed as follows: the second guide groove 31 is a symmetrical structure, which includes a second guide groove section 32 and a second positioning groove section 33 that are connected to each other, and the second guide groove section 32 is located below the second positioning groove section 33. The groove width of the second guide groove section 32 decreases from bottom to top, and the minimum groove width of the second guide groove section 32 is equal to the groove width of the second positioning groove section 33, and the groove width of the second positioning groove section 33 is adapted to the width of the magnet 11. Through the above arrangement, after the magnet 11 is attached to the wheel hub 12, if the position of the magnet 11 is deviated, it can also be guided to the second positioning groove section 33 by the wide second guide groove section 32, ensuring that the magnet 11 attached to the wheel hub 12 is positioned twice.

[0042] The cooperation principle of the utility model and the magnetic steel pressing device 13 is as follows: first, the wheel hub 12 is accurately positioned on the positioning seat 20 to ensure the accuracy of the assembly and guidance of the magnetic steel 11. After the magnetic steel pressing device 13 grabs M magnetic steels 11, the magnetic steel pressing device 13 shrinks, and the magnetic steel 11 it carries can pass through the attitude ring 30 and extend into the inner ring of the wheel hub 12. When the magnetic steel pressing device 13 is horizontally extended, the magnetic steel 11 can be pushed toward the inner ring of the wheel hub 12. At this time, the magnetic steel 11 is first guided through the first guide groove 27 until the magnetic steel 11 is attached to the inner ring of the wheel hub 12. Then the lifting drive member drives the posture ring 30 to press down, and the upper end of the magnet 11 can be inserted into the second guide groove 31. Because the lower end of the magnet 11 is supported by the bottom of the first guide groove 27, if the magnet 11 is skewed, it can also be corrected by the second guide groove 31. When the lower end of the magnet 11 completely abuts the corresponding first positioning groove section 29, and the upper end of the magnet 11 completely abuts the corresponding second positioning groove section 33, the magnet 11 completes the guidance and positioning. This setting can ensure the precise positioning of the magnet 11 in the wheel hub 12.

[0043] After the magnetic steel 11 is positioned by the utility model, the magnetic steel pressing device 13 is withdrawn, and then the positioning ring 30 is withdrawn, and the wheel hub 12 with the magnetic steel 11 assembled can be taken out from the positioning seat 20. In order to ensure that the wheel hub 12 with the magnetic steel 11 assembled will not be magnetically interfered by components other than the wheel hub 12 when unloading, and to ensure the position stability between the magnetic steel 11 and the wheel hub 12, the present case requires that the positioning seat 20 and the positioning ring 30 are both made of non-magnetic hard materials. In the positioning seat 20, if the insert ring 26 is not integrally formed with the tube body 22, only the insert ring 26 can be made of non-magnetic hard materials.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A wheel hub magnetic steel pressing guide device, characterized in that: include: A positioning seat is used to position the wheel hub. The positioning seat is provided with an insert ring, which can be inserted into the inner ring of the wheel hub. The top circumference of the insert ring is evenly distributed with M first guide grooves for guiding the magnetic steel in the horizontal direction. The total number of magnetic steels provided on a wheel hub is defined as N, then M=N. The insert ring can support the magnetic steel in the vertical direction. The posture fixing mechanism includes a lifting drive component and a posture fixing ring. The posture fixing ring is arranged directly above the positioning seat, and the lifting drive component drives the posture fixing ring to move relative to the positioning seat; the bottom of the posture fixing ring is provided with a second guide groove which corresponds to the first guide groove and is used to guide the magnetic steel in the vertical direction; the first guide groove, the insert ring and the second guide groove cooperate to complete the positioning of the magnetic steel.

2. The wheel hub magnetic steel pressing and guiding device according to claim 1, characterized in that: The first guide groove includes a first guide groove section and a first positioning groove section which are interconnected. The first guide groove section is arranged close to the inner ring of the insert ring, and the first positioning groove section is arranged close to the outer ring of the insert ring. The groove width of the first guide groove section decreases from the inner ring to the outer ring of the insert ring, and the minimum groove width of the first guide groove section is equal to the groove width of the first positioning groove section. The groove width of the first positioning groove section is adapted to the width of the magnetic steel.

3. The wheel hub magnetic steel pressing and guiding device according to claim 1, characterized in that: The second guide groove includes a second guide groove section and a second positioning groove section which are interconnected. The second guide groove section is located below the second positioning groove section. The groove width of the second guide groove section decreases from bottom to top, and the minimum groove width of the second guide groove section is equal to the groove width of the second positioning groove section. The groove width of the second positioning groove section is adapted to the width of the magnetic steel.

4. The wheel hub magnetic steel pressing and guiding device according to claim 1, characterized in that: The insert ring is integrally formed on the positioning seat.

5. The wheel hub magnetic steel pressing and guiding device according to claim 1, characterized in that: The positioning seat is provided with a step surface for positioning the inner ring of the hub.

6. The wheel hub magnetic steel pressing and guiding device according to claim 5, characterized in that: The positioning seat comprises a base and a tube body, and the step surface is arranged on the top outer side of the tube body.

7. The wheel hub magnetic steel pressing and guiding device according to claim 1, characterized in that: It also includes at least two in-place detection elements for detecting whether the wheel hub is placed stably on the positioning seat, and the in-place detection elements are evenly distributed on the positioning seat.

8. The wheel hub magnetic steel pressing and guiding device according to claim 7, characterized in that: The in-position detection element is a micro switch.

9. The wheel hub magnetic steel pressing and guiding device according to claim 1, characterized in that: The positioning seat and the attitude fixing ring are both made of non-magnetic hard material.

10. The wheel hub magnetic steel pressing and guiding device according to claim 1, characterized in that: The part of the insert ring that supports the magnetic steel in the vertical direction is the bottom of the first positioning groove, and the bottoms of all the first positioning grooves are on the same horizontal plane.

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