Inflation nozzle restraint structure of easy-to-disassemble inner tube type hub motor

Abstract

The invention discloses an inflating nozzle constraint structure of an easily-detached inner tube type hub motor. The inflating nozzle constraint structure comprises a stator shaft, two end covers, a rim, an inner tube, a permanent magnet rotor, a stator winding and an outer tube which are coaxial, the two end covers are locked on two sides of the rim, and inner rings of the end covers are in running fit with the stator shaft; the outer tire is arranged on the outer ring of the rim; an outer ring of each end cover is integrally provided with a circle of structural ring, and one part of the structural ring of one of the two end covers is provided with an air nozzle extending notch; an air tap penetrating hole is hollowed in the wall body, close to one side of the air tap extending gap, of the rim; the columnar air tap of the inner tube sequentially penetrates through the air tap penetrating hole and the air tap extending notch and is exposed outside; an air tap constraint device is mounted at the air tap extending gap, and the air tap constraint device tightly holds the columnar air tap; and the air tap is effectively restrained, and meanwhile, the easy-to-disassemble and easy-to-assemble performance is realized.

Description

Technical Field

[0001] The invention belongs to the field of wheel hub motors. Background Art

[0002] The inner tube of the hub motor is a wearing part. After a certain period of driving, the inner tube will break and wear. It needs to be designed to be easy to disassemble, and the air nozzle of the inner tube needs to be constrained in the assembled state. Otherwise, when the inner tube is deflated, the air nozzle is easy to retract into the inner cavity of the outer tube, which is not convenient for inflation. Therefore, it is necessary to design an air nozzle constraint structure. When disassembling the traditional air nozzle constraint structure, it is necessary to disassemble the wheel hub side cover while disassembling the air nozzle constraint structure. Due to the lack of tools and professionalism of consumers, installation errors may occur when disassembling the side cover (the screw torque does not meet the standard, the nut is damaged, the thread slips, etc.), which is not conducive to safe driving. The purpose of this design is to design a method that can realize the disassembly of the inner tube without disassembling the wheel hub side cover when disassembling the inner tube (no need to remove the screws, only need to separate the air nozzle constraint structure to disassemble the inner tube). Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides an air nozzle restraint structure for an easily removable inner tube type hub motor, which effectively restrains the air nozzle while achieving easy disassembly and installation performance.

[0004] Technical solution: To achieve the above-mentioned purpose, the present invention provides an air nozzle constraint structure for an easily removable inner tube type hub motor, comprising 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 both sides of the wheel rim, and the inner ring of the end cover is rotatably matched with the stator shaft; the outer tube is on the outer ring of the wheel rim, and the inner tube is inside the outer tube; the outer ring of the end cover is integrally provided with a circle of structural ring, and a part of the structural ring of one of the two end covers is provided with an air nozzle protruding gap; an air nozzle passing hole is hollowed out on the wall of the wheel rim on one side close to the air nozzle protruding gap; the columnar air nozzle of the inner tube passes through the air nozzle passing hole and the air nozzle protruding gap in turn, and is exposed to the outside; an air nozzle restraint is installed at the air nozzle protruding gap, and the air nozzle restraint holds the columnar air nozzle.

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

[0006] Furthermore, the air nozzle restraint includes block a and block b that are spliced ​​to each other, and a semi-cylindrical groove a and a semi-cylindrical groove b are respectively provided on the side where block a and block b are close to each other. When block a and block b are in the spliced ​​state, the semi-cylindrical groove a and the semi-cylindrical groove b are assembled into a columnar restraint channel.

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

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

[0009] The outer end of block b is integrally provided with a U-shaped limit platform, and in the assembled state, the U-shaped limit platform is clamped in the contour step groove along the contour.

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

[0011] Furthermore, buckle grooves are symmetrically arranged on both sides of block a, and the length directions of the two buckle grooves extend along the axis direction of the columnar constraint channel; elastically deformable buckle strips are arranged in the two buckle grooves along the length direction, and the sides of the bottom ends of the two buckle strips close to each other are fixedly connected to the two sides of the bottom end of block a through fixed arms;

[0012] A hook block is integrally arranged on the side of the waist of the two buckle strips away from each other, the side of the hook block close to the bottom end of block a is a hook inclined surface, and the side away from the bottom end of block a is a limiting plane; a tool slot is arranged on the end of the two buckle strips away from the bottom end of block a;

[0013] When block a passes through the gap of the gas nozzle from outside to inside, the inner contours on both sides of the gap of the gas nozzle press the hook slopes of the two hook blocks, forcing the two buckle strips to bend elastically toward the side close to each other;

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

[0015] Further, the side surfaces of block a and block b that are close to each other are respectively recorded as a joint surface a and b joint surface; a pair of inserting openings for inserting blades are arranged on the joint surface a, and a pair of inserting blades are vertically fixedly arranged on the joint surface b; the blades of the inserting blades are non-sharp and passivated blades;

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

[0017] When block a is assembled, at the initial stage of inserting block b, the sharp tip of the blade of the insert knife on block b first contacts the a joint surface on block a. As block b is pushed forward, the insert knife gradually wedges between blocks a and b, so that blocks a and b tend to move away from each other under the thrust of the insert knife, and blocks b and b are adaptively elastically deformed, so that the gap between the semi-columnar groove a and the semi-columnar groove b is expanded, thereby reducing the friction thrust of the semi-columnar groove b on the side wall of the cylindrical air nozzle during the insertion of block b, and preventing the cylindrical air nozzle from shrinking from the air nozzle through the hole into the inner side of the wheel rim during the insertion of block b;

[0018] After block b is fully inserted, the two knives are just inserted into the two knife insertion openings, the two knives are released from the wedged state, the shapes of blocks b and b are restored, and the semi-columnar groove a and the semi-columnar groove b tightly embrace the waist of the cylindrical air nozzle.

[0019] Furthermore, both block a and block b are made of elastically deformable materials; the main body material is relatively hard rubber, etc.; the buckle strip, fixed arm and hook block are all made of high-toughness plastic materials that are integrally arranged, and the insert knife is made of hard plastic material.

[0020] Beneficial effect: The invention can effectively constrain the air nozzle and achieve easy disassembly and assembly.

[0021] When block a has been inserted, at the initial stage of inserting block b, the sharp tip of the blade of the inserting knife on block b first contacts the a joint surface on block a. As block b is pushed forward, the inserting knife gradually wedges between blocks a and b, so that blocks a and b 12 tend to move away from each other under the thrust of the inserting knife, and blocks b and b are adaptively elastically deformed, so that the gap between the semi-columnar groove a and the semi-columnar groove b 18b is expanded, thereby reducing the friction thrust of the semi-columnar groove b on the side wall of the cylindrical air nozzle 6 during the insertion of block b, and preventing the cylindrical air nozzle from shrinking from the air nozzle through hole into the inner side of the wheel rim during the insertion of block b;

[0022] After block b is fully inserted, the two knives are just inserted into the two knife insertion openings, the two knives are released from the wedging state, the shapes of blocks b and b are restored, and the semi-columnar embracing groove a and the semi-columnar embracing groove b 18b tightly embrace the waist of the cylindrical air nozzle 6 to restrain the cylindrical air nozzle and avoid the problem that the cylindrical air nozzle is easily retracted from the air nozzle through the hole into the inside of the wheel rim when the inner tube is not inflated. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the overall cross-sectional view of the hub motor, and the coil stator is hidden in this figure;

[0024] Figure 2 This is a schematic diagram of the hub motor assembly;

[0025] Figure 3This is a schematic diagram of the dismantling of the hub motor end cover. This figure only shows the internal structure. It is not necessary to remove the end cover when removing the air nozzle restraint and inner tube.

[0026] Figure 4 It is a schematic diagram of the structure of the air nozzle restraint;

[0027] Figure 5 Schematic diagrams of the air nozzle restraint in the disassembled state from two perspectives. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] As attached Figures 1 to 5 The air pump nozzle restraint structure of an easily removable inner tube type wheel hub motor is shown in FIG. Figure 1 As shown, it includes a coaxial stator shaft 8, two end covers 7, a wheel rim 5, an inner tube 2 and an outer tube 1; the outer rings of the two end covers 7 are fixed and locked on both sides of the wheel rim 5 by flange bolts, and the inner rings of the two end covers 7 are rotatably matched with the stator shaft 8 through bearings; a stator winding ( Figure 1 The inner ring of the wheel rim 5 is fixedly mounted with a permanent magnet rotor 33; the outer tire 1 is coaxially mounted on the outer ring of the wheel rim 5, and the inner tire 2 is coaxially mounted inside the outer tire 1.

[0030] like Figure 4 The outer ring of the end cover 7 is integrally provided with a circle of structural ring 4, and a part of the structural ring 4 of one of the two end covers 7 is provided with a nozzle protruding notch 9; a nozzle through hole 27 is hollowed out on the wall of the wheel rim 5 on the side close to the nozzle protruding notch 9; the columnar air nozzle 6 of the inner tube 2 passes through the air nozzle through hole 27 and the air nozzle protruding notch 9 in turn, and is exposed to the outside; a nozzle restraint 10 is installed at the air nozzle protruding notch 9, and the nozzle restraint 10 holds the waist of the columnar air nozzle 6; in order to facilitate the installation and removal of the columnar air nozzle 6, the inner diameter of the nozzle through hole 27 is larger than the outer diameter of the columnar air nozzle 6.

[0031] like Figure 4 and 5 The air nozzle restraint 10 includes a block 11 and a block b 12 that are spliced ​​to each other. A semi-columnar groove 18a and a semi-columnar groove 18b are respectively provided on the side where the a block 11 and the b block 12 are close to each other. When the a block 11 and the b block 12 are in the spliced ​​state, the a semi-columnar groove 18a and the b semi-columnar groove 18b are assembled into a columnar restraint channel 18.

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

[0033] An enclosure wall 26 is arranged around the air nozzle through hole 27 on the outside of the wheel rim 5, and the enclosure range of the enclosure wall 26 forms an air nozzle restraint slot 25; in the assembled state, the bottom end of the air nozzle restraint 10 formed by splicing the a block 11 and the b block 12 is inserted into the air nozzle restraint slot 25.

[0034] Buckle grooves 14 are symmetrically arranged on both sides of block a 11, and the length directions of the two buckle grooves 14 extend along the axial direction of the columnar constraint channel 18; elastically deformable buckle strips 16 are arranged in the two buckle grooves 14 along the length direction, and the sides where the bottom ends of the two buckle strips 18 are close to each other are fixedly connected to the two sides of the bottom end of block a 11 through fixed arms 16a; the waists of the two buckle strips 18 are away from each other. The side of the hook block 17 close to the bottom end of block a 11 is a hook inclined surface 17a, and the side away from the bottom end of block a 11 is a limiting plane 17b; the ends of the two buckle strips 18 away from the bottom end of block a 11 are provided with tool slots 41, and the two pointed tips of the clamping end of the needle-nosed pliers can be respectively inserted into the two tool slots 41 at the ends of the two buckle strips 18.

[0035] When the block a 11 passes through the notch 9 of the gas nozzle from the outside to the inside, the inner contours of the two sides of the notch 9 of the gas nozzle in the U-shaped wheel press the hook inclined surfaces 17a of the two hook blocks 17, forcing the two buckle strips 18 to bend elastically toward the side close to each other;

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

[0037] like Figure 5, the side surfaces of the a block 11 and the b block 12 that are close to each other are respectively recorded as the a joint surface 19 and the b joint surface 20; a pair of inserting openings 23 are provided on the a joint surface 19, and a pair of inserting knives 21 are vertically fixedly provided on the b joint surface 20; the blade 21a of the inserting knives 21 is a non-sharp and passivated blade; the extension line of the blade 21a of the inserting knives 21 forms an acute angle with the b joint surface 20, so that the end of the inserting knives 21 close to the bottom end of the b block 12 is an acute angle tip end 21a; in the assembled state, the two inserting knives 21 are just inserted into the two inserting knives insertion openings 23; when the a block 11 has been assembled, at the initial stage of inserting the b block 12, the blades 21a of the b block 12 are inserted into the inserting openings 23; The sharp-angled tip end 21a of the blade 21a of the insert knife 21 first contacts the a-joint surface 19 on the a-block 11. As the b-block 12 is pushed forward, the insert knife 21 is gradually wedged between the a-block 11 and the b-block 12, so that the a-block 11 and the b-block 12 tend to move away from each other under the thrust of the insert knife 21, and the b-blocks 12 and the b-blocks 12 are adaptively elastically deformed, so that the gap between the a-semi-columnar groove 18a and the b-semi-columnar groove 18b is expanded, thereby reducing the friction thrust of the b-semi-columnar groove 18b on the side wall of the cylindrical air nozzle 6 during the insertion of the b-block 12, thereby preventing the cylindrical air nozzle 6 from retracting from the air nozzle through hole 27 into the inner side of the wheel rim 5 during the insertion of the b-block 12.

[0038] After the b block 12 is fully inserted, the two inserting knives 21 are just inserted into the two inserting knife insertion openings 23, the two inserting knives 21 are released from the wedging state, the shapes of the b block 12 and the b block 12 are restored, and the a semi-columnar embracing groove 18a and the b semi-columnar embracing groove 18b tightly embrace the waist of the cylindrical air nozzle 6.

[0039] The a block 11 and the b block 12 are both made of elastically deformable materials; the main body material is relatively hard rubber, etc.; the buckle strip 18, the fixed arm 16a and the hook block 17 are all made of high-toughness plastic materials that are integrally arranged, and the inserting blade 21 is made of hard plastic material.

[0040] Working principle:

[0041] Before removing the inner tube, it is necessary to remove the air nozzle restraint 10 separately first, and use the two clamp ends of the needle-nosed pliers to insert into the tool slots 41 on the two buckle strips 18 on both sides of the a block 11, and then hold the handles of the needle-nosed pliers firmly so that the two clamp ends of the needle-nosed pliers force the two buckle strips 18 to bend elastically toward each other, so that the two hook blocks 17 are close to each other until they are separated from the inner side of the structural ring 4, thereby releasing the clamping state of the a block 11. At this time, the a block 11 can be forcibly pulled outward with needle-nosed pliers; then the b block 12 is pulled outward, thereby achieving the purpose of removing the air nozzle restraint 10 from the gap 9 where the air nozzle protrudes; then the inner tube 2 can be removed according to the conventional method.

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

[0043] First, the gas nozzle corresponding to the a block 11 is inserted out of the notch 9, and the bottom end of the a block 11 is inserted into the gas nozzle restrainer slot 25, and then the gas nozzle corresponding to the b block 12 is inserted out of the notch 9. When the a block 11 has been inserted, at the initial stage of inserting the b block 12, the sharp-angled tip end 21a of the blade 21a of the inserting knife 21 on the b block 12 first contacts the a-joining surface 19 on the a block 11. As the b block 12 is pushed forward, the inserting knife 21 is gradually wedged in the a block 11. Between the a block 11 and the b block 12, the a block 11 and the b block 12 tend to move away from each other under the thrust of the inserting knife 21, and the b block 12 and the b block 12 are adaptively elastically deformed, so that the gap between the a semi-columnar groove 18a and the b semi-columnar groove 18b is expanded, thereby reducing the friction thrust of the b semi-columnar groove 18b on the side wall of the cylindrical air nozzle 6 during the insertion of the b block 12, and preventing the cylindrical air nozzle 6 from shrinking from the air nozzle through hole 27 into the inner side of the wheel rim 5 during the insertion of the b block 12;

[0044] After the b block 12 is fully inserted, the two blades 21 are just inserted into the two blade insertion openings 23, the two blades 21 are released from the wedging state, the shapes of the b block 12 and the b block 12 are restored, the a semi-columnar embracing groove 18a and the b semi-columnar embracing groove 18b tightly embrace the waist of the cylindrical air nozzle 6, thereby restraining the cylindrical air nozzle 6 and avoiding the problem that the cylindrical air nozzle 6 is easily retracted from the air nozzle through hole 27 into the inner side of the wheel rim 5 when the inner tube 2 is not inflated.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An air pump nozzle restraint structure for an easily removable inner tube type hub motor, characterized in that: The invention comprises a coaxial stator shaft (8), two end covers (7), a wheel rim (5), an inner tube (2), a permanent magnet rotor (33), a stator winding and an outer tube (1); the two end covers (7) are locked on both sides of the wheel rim (5), and the inner ring of the end cover (7) is rotatably matched with the stator shaft (8); the outer tube (1) is on the outer ring of the wheel rim (5), and the inner tube (2) is inside the outer tube (1); the outer ring of the end cover (7) is integrally provided with a circle of structural ring (4), and one of the two end covers (7) is provided with a circle of structural ring (4). A portion of the structural ring (4) of the cover (7) is provided with a nozzle protruding notch (9); a nozzle through hole (27) is hollowed out on the wall of the wheel rim (5) on the side close to the nozzle protruding notch (9); the columnar nozzle (6) of the inner tube (2) passes through the nozzle through hole (27) and the nozzle protruding notch (9) in sequence and is exposed to the outside; a nozzle restrainer (10) is installed at the nozzle protruding notch (9), and the nozzle restrainer (10) holds the columnar nozzle (6) tightly.

2. The air pump nozzle restraint structure of the easily removable inner tube type hub motor according to claim 1, characterized in that: The inner diameter of the air nozzle through hole (27) is greater than the outer diameter of the columnar air nozzle (6).

3. The air nozzle restraint structure of the easily removable inner tube type hub motor according to claim 1, characterized in that: The air nozzle restraint (10) comprises a block a (11) and a block b (12) which are spliced ​​to each other. A semi-columnar groove (18a) and a semi-columnar groove (18b) are respectively provided on the sides of the block a (11) and the block b (12) which are close to each other. When the block a (11) and the block b (12) are in a spliced ​​state, the semi-columnar groove (18a) and the semi-columnar groove (18b) form a columnar restraint channel (18).

4. The air pump nozzle restraint structure of the easily removable inner tube type hub motor according to claim 1, characterized in that: The outer contour of the air nozzle restrainer (10) formed by splicing the a block (11) and the b block (12) is adapted to the inner contour of the air nozzle protruding notch (9).

5. The air pump nozzle restraint structure of the easily removable inner tube type hub motor according to claim 4, characterized in that: The air nozzle protruding notch (9) is a U-shaped inner contour with the opening groove away from the side of the structural ring (4), and a contour step groove (9a) is provided along the U-shaped inner contour on the side of the air nozzle protruding notch (9) close to the outer surface of the structural ring (4); The outer end of the 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 clamped in the contour step groove (9a) along the contour.

6. The air pump nozzle restraint structure of the easily removable inner tube type hub motor according to claim 5, characterized in that: An enclosure wall (26) is arranged on the outside of the wheel rim (5) around the air nozzle through hole (27), and the enclosure range of the enclosure wall (26) forms an air nozzle restraint slot (25); in the assembled state, the bottom end of the air nozzle restraint (10) formed by splicing the a block (11) and the b block (12) is inserted into the air nozzle restraint slot (25).

7. The air pump nozzle restraint structure of the easily removable inner tube type hub motor according to claim 5, characterized in that: Buckle grooves (14) are symmetrically arranged on both sides of the a block (11), and the length directions of the two buckle grooves (14) extend along the axial direction of the columnar constraint channel (18); elastically deformable buckle strips (16) are arranged in the two buckle grooves (14) along the length direction, and the sides of the bottom ends of the two buckle strips (18) close to each other are fixedly connected to the two sides of the bottom end of the a block (11) through fixed arms (16a); A hook block (17) is integrally provided on the side of the waist of the two buckle strips (18) away from each other; the side of the hook block (17) close to the bottom end of the a block (11) is a hook inclined surface (17a), and the side away from the bottom end of the a block (11) is a limiting plane (17b); the ends of the two buckle strips (18) away from the bottom end of the a block (11) are both provided with a tool slot (41); When the a block (11) passes through the notch (9) of the gas nozzle from the outside to the inside, the inner contours on both sides of the notch (9) of the gas nozzle press the hook inclined surfaces (17a) of the two hook blocks (17), forcing the two buckle strips (18) to bend elastically toward the side close to each other; In the assembled state, the two limiting planes (17b) of the two hook blocks (17) limit the inner side surface of the contact structure ring (4).

8. The air pump nozzle restraint structure of the easily removable inner tube type hub motor according to claim 7, characterized in that: The side surfaces of the a block (11) and the b block (12) that are close to each other are respectively marked as the a joint surface (19) and the b joint surface (20); a pair of inserting openings (23) for inserting blades are arranged on the a joint surface (19); a pair of inserting blades (21) are vertically fixedly arranged on the b joint surface (20); the blades (21a) of the inserting blades (21) are non-sharp and passivated blades; The extension line of the blade (21a) of the insert knife (21) forms an acute angle with the b joint surface (20), so that the end of the insert knife (21) close to the bottom end of the b block (12) is an acute angle tip end (21a); ​​in the assembled state, the two insert knives (21) are just inserted into the two insert knife insertion openings (23); When the a block (11) is assembled, at the initial stage of inserting the b block (12), the sharp tip end (21a) of the blade (21a) of the inserting knife (21) on the b block (12) first contacts the a joint surface (19) on the a block (11). As the b block (12) is pushed forward, the inserting knife (21) gradually wedges between the a block (11) and the b block (12), so that the a block (11) and the b block (12) are pushed forward by the inserting knife (21). The b blocks (12) and the b blocks (12) tend to move away from each other, and the b blocks (12) are adaptively elastically deformed, so that the gap between the a semi-columnar groove (18a) and the b semi-columnar groove (18b) is expanded, thereby reducing the friction thrust of the b semi-columnar groove (18b) on the side wall of the columnar air nozzle (6) during the insertion of the b block (12), thereby preventing the columnar air nozzle (6) from being retracted from the air nozzle through hole (27) into the inner side of the wheel rim (5) during the insertion of the b block (12); After the b block (12) is fully inserted, the two inserting knives (21) are just inserted into the two inserting knife insertion openings (23), the two inserting knives (21) are released from the wedging state, the shapes of the b block (12) and the b block (12) are restored, and the a semi-columnar embracing groove (18a) and the b semi-columnar embracing groove (18b) tightly embrace the waist of the cylindrical air nozzle (6).

9. The air pump nozzle restraint structure of the easily removable inner tube type hub motor according to claim 5, characterized in that: Block a (11) and block b (12) are both made of elastically deformable materials; the main body material is relatively hard rubber or the like; the buckle strip (18), the fixed arm (16a) and the hook block (17) are all made of an integrally arranged high-toughness plastic material, and the inserting blade (21) is made of a hard plastic material.

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