A kind of easy to dismantle inner tube type wheel hub motor nozzle restraint structure

Abstract

The application discloses a tire inflation valve restraint structure of an easy-to-disassemble inner tube type wheel hub motor, which comprises a coaxial stator shaft, two end covers, a wheel rim, an inner tube, a permanent magnet rotor, a stator winding and an outer tube; the two end covers are locked on the two sides of the wheel rim, and the inner ring of the end cover is rotationally matched with the stator shaft; the outer tube is arranged on the outer ring of the wheel rim, and the inner tube is arranged in the outer tube; the outer ring of the end cover is integrally provided with a structure ring, a local part of the structure ring of one of the two end covers is provided with a tire inflation valve protruding gap, the wall body on the side close to the tire inflation valve protruding gap of the wheel rim is hollowed out to form a tire inflation valve through hole, the cylindrical tire inflation valve of the inner tube sequentially passes through the tire inflation valve through hole and the tire inflation valve protruding gap and is exposed outside, a tire inflation valve restraint device is arranged at the tire inflation valve protruding gap and tightly holds the cylindrical tire inflation valve; while effectively restraining the tire inflation valve, the easy-to-disassemble and easy-to-mount performance is realized.

Description

Technical Field

[0001] This invention belongs to the field of hub motors. Background Technology

[0002] The inner tube of the hub motor is a consumable part. After a certain period of driving, the inner tube will crack and wear out, requiring a design that facilitates disassembly. The valve stem of the inner tube needs to be constrained in the assembled state; otherwise, when the inner tube is deflated, the valve stem will easily retract into the inner cavity of the outer tire, making inflation difficult. Therefore, a valve stem constraint structure needs to be designed. Traditional valve stem constraint structures require disassembling the hub cover while removing the valve stem constraint structure. Due to varying levels of consumer tools and expertise, installation errors may occur when disassembling the hub cover (inadequate screw torque, damaged nuts, stripped threads, etc.), which is detrimental to safe driving. The purpose of this design is to create a method that allows the inner tube to be removed without removing the hub cover (no screws need to be removed; only the valve stem constraint structure needs to be separated to remove the inner tube). Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides an air valve constraint structure for an easy-to-remove inner tube type hub motor, which effectively constrains the air valve while achieving easy disassembly and assembly.

[0004] Technical Solution: To achieve the above objectives, the present invention provides an air inflator constraint structure for an easily detachable inner tube type hub motor, comprising a coaxial stator shaft, two end caps, a wheel rim, an inner tube, a permanent magnet rotor, a stator winding, and an outer tire; the two end caps are locked to both sides of the wheel rim, and the inner rings of the end caps are rotatably engaged with the stator shaft; the outer tire is located on the outer ring of the wheel rim, and the inner tire is located inside the outer tire; a structural ring is integrally provided on the outer ring of the end caps, and a portion of the structural ring of one of the end caps is provided with an air inflator protrusion notch; an air inflator through hole is hollowed out on the wall of the wheel rim near the air inflator protrusion notch; the cylindrical air inflator of the inner tube passes through the air inflator through hole and the air inflator protrusion notch in sequence and is exposed to the outside; an air inflator constraint is installed at the air inflator protrusion notch, and the air inflator constraint tightly holds the cylindrical air inflator.

[0005] Furthermore, the inner diameter of the nozzle through the hole is larger than the outer diameter of the cylindrical nozzle.

[0006] Furthermore, the air valve restraint includes blocks a and b that are spliced ​​together. Blocks a and b are respectively provided on the side of blocks a and b that are close to each other. When blocks a and b are spliced ​​together, the semi-cylindrical grooves a and b form a cylindrical restraint channel.

[0007] Furthermore, the outer contour of the air nozzle restraint formed by splicing blocks a and b is adapted to the inner contour of the air nozzle protrusion notch.

[0008] Furthermore, the nozzle protrusion notch is a U-shaped inner contour with the opening groove away from the structural ring, and a contour step groove is provided along the U-shaped inner contour on the side of the nozzle protrusion notch close to the outer surface of the structural ring.

[0009] A U-shaped limiting platform is integrally provided at the outer end of block b. In the assembled state, the U-shaped limiting platform is locked in the contour step groove along the contour.

[0010] Furthermore, an enclosure wall is provided around the valve stem through hole on the outer side of the wheel rim, and the enclosure range of the enclosure wall forms the valve stem restraint slot; in the assembled state, the bottom end of the valve stem restraint formed by splicing block a and block b is inserted into the valve stem restraint slot.

[0011] Furthermore, there are symmetrical buckle grooves on both sides of block A, and the length direction of both buckle grooves extends along the axis of the columnar constraint channel; there are elastically deformable buckle strips in both buckle grooves along the length direction, and the bottom ends of the two buckle strips are fixedly connected to the two bottom ends of block A by a fixing arm.

[0012] Both buckle strips have a hook block integrally provided on the side of their waists that are far apart from each other. The side of the hook block closer to the bottom of block a is the hook bevel, and the side away from the bottom of block a is the limiting plane. Both buckle strips have a tool slot at the end away from the bottom of block a.

[0013] As block A passes through the air nozzle from the outside in and protrudes out of the gap, the inner contours on both sides of the air nozzle protruding out of the gap press against the hook slopes of the two hook blocks, forcing the two buckle strips to bend elastically toward the side that is closer to each other.

[0014] In the assembled state, the two limiting planes of the two hook blocks limit the contact with the inner surface of the structural ring.

[0015] Furthermore, the sides of blocks a and b that are close to each other are respectively designated as the a-joint surface and the b-joint surface; a pair of insert holes are provided on the a-joint surface, and a pair of inserts are vertically fixed on the b-joint surface; the blades of the inserts are non-sharp, blunt blades.

[0016] The blade extension line of the insert knife forms an acute angle with the mating surface of b, so that the end of the insert knife near the bottom of block b is an acute-angled tip; in the assembled state, the two insert knives are just inserted into the two insert knife insertion holes;

[0017] With block a already assembled, at the initial stage of inserting block b, the acute-angled tip of the blade on block b first contacts the mating surface a on block a. As block b is pushed forward, the blade gradually weds between block a and block b, causing block a and block b to move away from each other under the thrust of the blade. Block b undergoes adaptive elastic deformation, causing the gap between the a semi-cylindrical groove and the b semi-cylindrical groove to expand. This reduces the frictional thrust of the b semi-cylindrical groove on the side wall of the cylindrical air nozzle during the insertion of block b, and prevents the cylindrical air nozzle from retracting into the inner side of the wheel rim from the air nozzle through hole during the insertion of block b.

[0018] After block b is fully inserted, the two inserts are inserted into the insert openings, the two inserts are released from the wedge position, and the shape of block b is restored. The a semi-cylindrical groove and the b semi-cylindrical groove tightly hug the waist of the cylindrical air nozzle.

[0019] Furthermore, both blocks A and B are made of elastically deformable materials; the main body is made of relatively hard rubber; the buckle strip, fixing arm, and hook block are all made of high-toughness plastic in one piece, and the insert is made of hard plastic.

[0020] Beneficial effects: The present invention achieves easy disassembly and assembly while effectively constraining the air nozzle.

[0021] With block a already inserted, at the initial stage of inserting block b, the acute-angled tip of the blade on block b first contacts the mating surface a on block a. As block b is pushed forward, the blade gradually weds between block a and block b, causing block a and block b 12 to tend to move away from each other under the thrust of the blade. Block b undergoes adaptive elastic deformation, thereby expanding the gap between the a semi-cylindrical groove and the b semi-cylindrical groove 18b. This reduces the frictional thrust of the b semi-cylindrical groove on the side wall of the cylindrical air nozzle 6 during the insertion of block b, and prevents the cylindrical air nozzle from retracting into the inner side of the wheel rim from the air nozzle through hole during the insertion of block b.

[0022] After block b is fully inserted, the two inserters are inserted into the insert holes, the two inserters are released from the wedge state, and the shape of block b is restored. The a semi-cylindrical groove and the b semi-cylindrical groove 18b tightly hug the waist of the cylindrical valve 6, thereby constraining the cylindrical valve and avoiding the problem that the cylindrical valve can easily retract into the inside of the rim when the inner tube is not inflated. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of the hub motor; the coil stator is omitted from this drawing.

[0024] Figure 2 A schematic diagram of the hub motor assembly;

[0025] Figure 3This diagram shows the wheel hub motor end cap after disassembly. This diagram only shows the internal structure. The end cap does not need to be removed when disassembling the valve restraint and inner tube.

[0026] Figure 4 This is a schematic diagram of the air valve restraint structure;

[0027] Figure 5 These are two schematic diagrams showing the air valve restraint in its disassembled state. Detailed Implementation

[0028] The invention will now be further described with reference to the accompanying drawings.

[0029] As attached Figures 1 to 5 The diagram shows a valve stem constraint structure for an easily detachable inner tube type hub motor, such as... Figure 1 As shown, the system includes a coaxial stator shaft 8, two end caps 7, a wheel rim 5, an inner tube 2, and an outer tire 1. The outer rings of the two end caps 7 are fixed and locked to both sides of the wheel rim 5 by flange bolts, and the inner rings of the two end caps 7 are rotatably fitted with the stator shaft 8 by bearings. A stator winding is coaxially fixed on one end of the stator shaft 8 between the two end caps 7. Figure 1 (Not shown in the drawing); a permanent magnet rotor 33 is fixedly installed on the inner ring of the wheel rim 5; the outer tire 1 is coaxially installed on the outer ring of the wheel rim 5, and the inner tire 2 is coaxially installed inside the outer tire 1.

[0030] like Figure 4 The outer ring of the end cap 7 is integrally provided with a structural ring 4, and a portion of the structural ring 4 of one of the end caps 7 is provided with a valve protrusion notch 9; the wall of the wheel rim 5 near the valve protrusion notch 9 has a valve through hole 27; the cylindrical valve 6 of the inner tube 2 passes through the valve through hole 27 and the valve protrusion notch 9 in sequence and is exposed to the outside; a valve restraint 10 is installed at the valve protrusion notch 9 and the valve restraint 10 hugs the waist of the cylindrical valve 6; in order to facilitate the installation and removal of the cylindrical valve 6, the inner diameter of the valve through hole 27 is larger than the outer diameter of the cylindrical valve 6.

[0031] like Figure 4 and 5 The air valve restraint device 10 includes a block 11 and a block 12 that are spliced ​​together. A semi-cylindrical groove 18a and a semi-cylindrical groove 18b are respectively provided on the side of the block 11 and the block 12 that are close to each other. When the block 11 and the block 12 are spliced ​​together, the semi-cylindrical groove 18a and the semi-cylindrical groove 18b form a cylindrical restraint channel 18.

[0032] like Figure 4The outer contour of the air nozzle restraint 10, which is formed by splicing block 11 and block 12, is adapted to the inner contour of the air nozzle protrusion notch 9. The air nozzle protrusion notch 9 is a U-shaped inner contour with the opening groove away from the structural ring 4. The side of the air nozzle protrusion notch 9 closest to the outer surface of the structural ring 4 is provided with a contour step groove 9a along the U-shaped inner contour. A U-shaped limiting platform 51 is integrally provided at the outer end of block 12. In the assembled state, the U-shaped limiting platform 51 is stuck in the contour step groove 9a along the contour.

[0033] An enclosure wall 26 is provided around the air nozzle through hole 27 on the outer side of the wheel rim 5, and the enclosure range of the enclosure wall 26 forms the air nozzle restraint slot 25; in the assembled state, the bottom end of the air nozzle restraint 10, which is spliced ​​from block a 11 and block b 12, is inserted into the air nozzle restraint slot 25.

[0034] The two sides of block 11 are symmetrically provided with snap-fit ​​grooves 14, and the length direction of both snap-fit ​​grooves 14 extends along the axis of the columnar constraint channel 18. Each of the two snap-fit ​​grooves 14 is provided with a snap-fit ​​strip 16 that can undergo elastic deformation along the length direction. The bottom ends of the two snap-fit ​​strips 18 are fixedly connected to the two sides of the bottom end of block 11 by a fixing arm 16a. The waist of the two snap-fit ​​strips 18 is provided with a hook block 17 integrally, the side of the hook block 17 near the bottom end of block 11 is a hook inclined surface 17a, and the side away from the bottom end of block 11 is a limiting plane 17b. Each end of the two snap-fit ​​strips 18 away from the bottom end of block 11 is provided with a tool slot 41, and the two tips of the needle-nose pliers can be inserted into the two tool slots 41 at the ends of the two snap-fit ​​strips 18 respectively.

[0035] As block 11 passes through the air nozzle from the outside to the inside and protrudes out of the notch 9, the inner contours of the two sides of the U-shaped air nozzle protruding out of the notch 9 press against the hook slope 17a of the two hook blocks 17, forcing the two buckle strips 18 to bend elastically toward the side that is closer to each other.

[0036] In the assembled state, the two limiting planes 17b of the two hook blocks 17 limit the contact with the inner side of the structural ring 4.

[0037] like Figure 5Let the sides of block a11 and block b12 that are close to each other be designated as mating surface a19 and mating surface b20, respectively. A pair of insert slots 23 are provided on mating surface a19, and a pair of inserts 21 are vertically fixed on mating surface b20. The blades 21a of the inserts 21 are blunt, non-sharp blades. The extension line of the blades 21a of the inserts 21 forms an acute angle with mating surface b20, thus making the end of the insert 21 near the bottom of block b12 an acute-angled tip 21a. In the assembled state, the two inserts 21 are inserted into the insert slots 23. When block a11 is already assembled, at the initial stage of inserting block b12, the inserts on block b12... The acute-angled tip 21a of the blade 21a of the inserter 21 first contacts the mating surface 19 on block a 11. As block b 12 is pushed forward, the inserter 21 gradually weds between block a 11 and block b 12, causing block a 11 and block b 12 to move away from each other under the thrust of the inserter 21. Block b 12 undergoes adaptive elastic deformation, thereby expanding the gap between the semi-cylindrical groove 18a and the semi-cylindrical groove 18b. This reduces the frictional thrust of the semi-cylindrical groove 18b on the side wall of the cylindrical air nozzle 6 during the insertion of block b 12, and prevents the cylindrical air nozzle 6 from retracting into the inner side of the wheel rim 5 through the air nozzle through hole 27 during the insertion of block b 12.

[0038] After block 12 is fully inserted, the two inserts 21 are inserted into the insert ports 23. The two inserts 21 are released from the wedge position, and the shape of block 12 is restored. The semi-cylindrical grooves 18a and 18b tightly hug the waist of the cylindrical nozzle 6.

[0039] Both block 11 and block 12 are made of elastically deformable material; the main body is made of hard rubber, etc.; the buckle strip 18, the fixing arm 16a and the hook block 17 are all made of high-toughness plastic material in one piece, and the insert knife 21 is made of hard plastic material.

[0040] Working principle:

[0041] Before removing the inner tube, the valve restraint 10 needs to be removed separately. Insert the ends of the two clamps of needle-nose pliers into the tool slots 41 on the two locking strips 18 on both sides of block a 11. Then, firmly hold the handle of the needle-nose pliers, so that the ends of the two clamps force the two locking strips 18 to bend elastically towards each other, thereby bringing the two hook blocks 17 closer together until they are separated from the inner side of the structural ring 4, thus releasing the locking state of block a 11. At this time, use the needle-nose pliers to forcefully pull block a 11 outward. Then pull block b 12 outward, thereby achieving the purpose of removing the valve restraint 10 from the valve protrusion notch 9. Then, remove the inner tube 2 according to the conventional method.

[0042] When the new inner tube 2 is installed, the cylindrical valve 6 of the inner tube 2 passes through the valve through hole 27 and the valve protrusion notch 9 in sequence and is exposed to the outside. At this time, the valve restraint 10 needs to be installed. The process of installing the valve restraint 10 is as follows:

[0043] First, extend the insertion nozzle corresponding to block a11 out of the notch 9 and insert the bottom end of block a11 into the nozzle restraint slot 25. Then, extend the insertion nozzle corresponding to block b12 out of the notch 9. With block a11 already inserted, at the initial stage of inserting block b12, the acute-angled tip 21a of the blade 21a on the inserter 21 of block b12 first contacts the mating surface 19 of block a11. As block b12 is pushed forward, the inserter 21 gradually weds into block a11. Between block 11 and block 12, under the thrust of inserter 21, block 11 and block 12 tend to move away from each other, and block 12 adapts to elastic deformation, thereby expanding the gap between the semi-cylindrical groove 18a and the semi-cylindrical groove 18b, thereby reducing the frictional thrust of the semi-cylindrical groove 18b on the side wall of the cylindrical air nozzle 6 during the insertion of block 12, and preventing the cylindrical air nozzle 6 from retracting into the inner side of the wheel rim 5 from the air nozzle through hole 27 during the insertion of block 12;

[0044] After block 12 is fully inserted, the two inserters 21 are inserted into the insert ports 23. The two inserters 21 are released from the wedge position, and the shape of block 12 is restored. The semi-cylindrical grooves 18a and 18b tightly hug the waist of the cylindrical valve 6, thereby constraining the cylindrical valve 6 and preventing the cylindrical valve 6 from easily retracting into the inside of the rim 5 through the valve through hole 27 when the inner tube 2 is not inflated.

[0045] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A valve stem constraint structure for an easily detachable inner tube type hub motor, characterized in that: The system includes a coaxial stator shaft (8), two end caps (7), a wheel rim (5), an inner tube (2), a permanent magnet rotor (33), a stator winding, and an outer tire (1); the two end caps (7) are locked on both sides of the wheel rim (5), and the inner ring of the end caps (7) is rotatably engaged with the stator shaft (8); the outer tire (1) is on the outer ring of the wheel rim (5), and the inner tube (2) is inside the outer tire (1); the outer ring of the end caps (7) is integrally provided with a structural ring (4), and one end of the two end caps (7) is... A portion of the structural ring (4) of the cover (7) is provided with a nozzle protrusion notch (9); the wall of the wheel rim (5) near the nozzle protrusion notch (9) has a nozzle through hole (27); the cylindrical nozzle (6) of the inner tube (2) passes through the nozzle through hole (27) and the nozzle protrusion notch (9) in sequence and is exposed to the outside; a nozzle restraint (10) is installed at the nozzle protrusion notch (9) and the nozzle restraint (10) holds the cylindrical nozzle (6) tightly. The outer contour of the air nozzle restraint (10), which is formed by splicing block (11) and block (12), is adapted to the inner contour of the air nozzle protrusion notch (9); The nozzle protrusion notch (9) is a U-shaped inner contour of the opening groove away from the structural ring (4). The nozzle protrusion notch (9) is provided with a contour step groove (9a) along the U-shaped inner contour on the side of the opening groove away from the outer surface of the structural ring (4). The outer end of block b (12) is integrally provided with a U-shaped limiting platform (51), and in the assembled state, the U-shaped limiting platform (51) is stuck in the contour step groove (9a) along the contour.

2. The air inflator constraint structure for an easily detachable inner tube type hub motor according to claim 1, characterized in that: The inner diameter of the nozzle through the hole (27) is larger than the outer diameter of the columnar nozzle (6).

3. The air inflator constraint structure for an easily detachable inner tube type hub motor according to claim 1, characterized in that: The air valve restraint device (10) includes a block (11) and a block (12) that are spliced ​​together. A semi-cylindrical groove (18a) and a semi-cylindrical groove (18b) are respectively provided on the side of the a block (11) and the b block (12) that are close to each other. When the a block (11) and the b block (12) are spliced ​​together, the semi-cylindrical groove (18a) and the semi-cylindrical groove (18b) are spliced ​​together to form a cylindrical restraint channel (18).

4. The air inflator constraint structure for an easily detachable inner tube type hub motor according to claim 1, characterized in that: The outer side of the wheel rim (5) is provided with an enclosing wall (26) around the air nozzle through hole (27), and the enclosing range of the enclosing wall (26) forms the air nozzle restraint slot (25); in the assembled state, the bottom end of the air nozzle restraint (10) formed by splicing block a (11) and block b (12) is inserted into the air nozzle restraint slot (25).

5. The air inflator constraint structure for an easily detachable inner tube type hub motor according to claim 1, characterized in that: The two sides of block a (11) are symmetrically provided with buckle grooves (14), and the length direction of the two buckle grooves (14) extends along the axis of the columnar constraint channel (18); the two buckle grooves (14) are provided with buckle strips (16) that can undergo elastic deformation along the length direction; the bottom ends of the two buckle strips (16) are fixedly connected to the two sides of the bottom end of block a (11) by fixing arms (16a) on the side that is close to each other. Both buckle strips (16) have a buckle block (17) integrally provided on the side of their waists that are far apart from each other. The side of the buckle block (17) closer to the bottom of block a (11) is a buckle inclined surface (17a), and the side away from the bottom of block a (11) is a limiting plane (17b). Both buckle strips (16) have a tool slot (41) at the end away from the bottom of block a (11). As block (11) passes through the air nozzle from the outside to the inside and protrudes out of the gap (9), the inner contours on both sides of the air nozzle protruding out of the gap (9) press against the hook slope (17a) of the two hook blocks (17), forcing the two buckle strips (16) to bend elastically toward the side that is close to each other. In the assembled state, the two limiting planes (17b) of the two hook blocks (17) limit the inner surface of the contact structure ring (4).

6. The air inflator constraint structure for an easily detachable inner tube type hub motor according to claim 5, characterized in that: The sides of block a (11) and block b (12) that are close to each other are respectively designated as the a-joining surface (19) and the b-joining surface (20); a pair of inserting holes (23) are provided on the a-joining surface (19), and a pair of inserting knives (21) are vertically fixed on the b-joining surface (20); the blade (21a) of the inserting knife (21) is a non-sharp, blunt blade; The extension line of the blade (21a) of the insert (21) forms an acute angle with the mating surface (20) of the b, so that the end of the insert (21) near the bottom of the b block (12) is an acute-angled tip; in the assembled state, the two inserts (21) are just inserted into the two insert insertion ports (23); With block a (11) already assembled, at the initial stage of inserting block b (12), the acute-angled tip of the blade (21a) of the inserter (21) on block b (12) first contacts the mating surface (19) a on block a (11). As block b (12) is pushed forward, the inserter (21) gradually weds between block a (11) and block b (12), causing block a (11) and block b (12) to tend to move towards each other under the pushing force of the inserter (21). As they move further apart, blocks a (11) and b (12) undergo adaptive elastic deformation, causing the gap between the a semi-cylindrical groove (18a) and the b semi-cylindrical groove (18b) to expand. This reduces the frictional thrust of the b semi-cylindrical groove (18b) on the side wall of the cylindrical nozzle (6) during the insertion of block b (12), and prevents the cylindrical nozzle (6) from retracting into the inner side of the wheel rim (5) from the nozzle through hole (27) during the insertion of block b (12). After block b (12) is fully inserted, the two inserts (21) are inserted into the insert ports (23) of the two inserts. The two inserts (21) are released from the wedge state, and the shapes of block a (11) and block b (12) are restored. The semi-cylindrical groove a (18a) and the semi-cylindrical groove b (18b) tightly hug the waist of the cylindrical nozzle (6).

7. The air inflator constraint structure for an easily detachable inner tube type hub motor according to claim 6, characterized in that: Both block a (11) and block b (12) are made of elastically deformable material; the main body material is hard rubber; the buckle strip (16), the fixing arm (16a) and the hook block (17) are all made of high-toughness plastic material in one piece, and the insert knife (21) is made of hard plastic material.

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