阅读说明：本技术 便于调节动平衡的消音轮毂 (Amortization wheel hub convenient to adjust dynamic balance ) 是由 李萍 于 2020-12-01 设计创作，主要内容包括：本发明公开了一种便于调节动平衡的消音轮毂,轮辋的外圆周表面上、沿着远离轮辐的方向依次同轴心设有装胎面和装胎槽和装胎面,轮辋的内圆周面上、位于装胎槽背向轮辐的一侧通过固定螺栓固定设有消音凸环,消音凸环由多个消音盒或者多个消音盒和多个配重盒依次收尾相连、拼接组合而成,轮辋的圆周面上、对应于凸环位置处分别均匀设有多排通孔,消音盒所设的多排消音槽与各自对应位置处的通气孔分别单独连通、形成亥姆霍兹共振器,配重盒面向轮辋的端面将对应位置处的通气孔堵住。从上述结构可知,本发明的便于调节动平衡的消音轮毂,从而无需拆除轮胎也能通过对消音盒和配重盒的调整来进行调节动平衡,以及对消音盒或配重盒进行维修或更换。(The invention discloses a noise reduction hub convenient for adjusting dynamic balance, wherein a tire mounting surface, a tire mounting groove and a tire mounting surface are sequentially and coaxially arranged on the outer circumferential surface of a rim along the direction far away from a spoke, a noise reduction convex ring is fixedly arranged on the inner circumferential surface of the rim and on one side of the tire mounting groove opposite to the spoke through a fixing bolt, the noise reduction convex ring is formed by sequentially closing and splicing a plurality of noise reduction boxes or a plurality of noise reduction boxes and a plurality of balance weight boxes, a plurality of rows of through holes are respectively and uniformly arranged on the circumferential surface of the rim and at positions corresponding to the convex rings, the plurality of rows of noise reduction grooves arranged on the noise reduction boxes are respectively and independently communicated with the vent holes at the corresponding positions to form a Helmholtz resonator, and the vent holes at the corresponding positions are blocked by the end surfaces of the balance weight boxes facing the rim. According to the structure, the silencing wheel hub convenient for dynamic balance adjustment is convenient, so that the dynamic balance adjustment can be performed through adjustment of the silencing box and the balance weight box without removing a tire, and the silencing box or the balance weight box can be maintained or replaced.)

1. Amortization wheel hub convenient to adjust dynamic balance, its characterized in that: the hub comprises a hub body, the hub body comprises a rim (1) and spokes (2) which are fixed coaxially, a tire loading surface (4), a tire loading groove (3) and a tire loading surface (4) are sequentially and coaxially arranged on the outer circumferential surface of the rim (1) along the direction far away from the spokes (2), the tire loading surface (4) is symmetrically arranged by taking the section of the axial middle point of the spokes (2) as a symmetrical surface, one side of the tire loading groove (4) back to the spokes (2) is fixedly provided with a silencing convex ring through a fixing bolt (11), the silencing convex ring is formed by sequentially ending and combining a plurality of silencing boxes (7) or a plurality of silencing boxes (7) and a plurality of balance weight boxes (8), a plurality of rows of vent holes (6) are respectively and uniformly arranged on the circumferential surface of the rim (1) corresponding to the positions of the convex ring, and a plurality of rows of vent holes (12) of the silencing grooves (7) and the corresponding positions of the silencing convex rings (6) are respectively arranged The balance weight box (8) is communicated separately to form a Helmholtz resonator, and the end face facing the rim (1) blocks the vent hole (6) at the corresponding position.

2. A noise dampening hub to facilitate adjustment of dynamic balance as defined in claim 1, wherein: and a positioning convex ring (4) is coaxially arranged on the inner circumferential surface of the rim (1), and one side of the silencing convex ring facing the spoke (2) is in contact positioning with the positioning convex ring (4).

3. A noise dampening hub to facilitate adjustment of dynamic balance as defined in claim 2, wherein: the positioning convex ring (4) is arranged on the inner circumferential surface of the rim (1) and is positioned on one side of the tire assembling groove (3) back to the spoke (2).

4. A noise dampening hub to facilitate adjustment of dynamic balance as defined in claim 1, wherein: the silencing convex ring is provided with connecting flanges (9) on one side end face facing the inner circumferential face of the rim (1) and on one side edge facing the spoke (2) and facing away from the spoke (2), and the fixing bolts (11) penetrate through the connecting flanges (9) and then are fixedly connected with the rim (1).

5. A noise dampening hub to facilitate adjustment of dynamic balance as defined in claim 4 wherein: the wheel rim is characterized in that a connecting ring (10) is fixedly connected to the position, corresponding to the fixing bolt (11), of the outer circumferential surface of the wheel rim (1), and the connecting ring (10) is provided with matched threaded holes corresponding to the fixing bolt (11) respectively.

6. A noise dampening hub to facilitate adjustment of dynamic balance as defined in claim 5, wherein: the connecting ring (10) is fixedly connected into an annular connecting groove correspondingly formed in the outer circumferential surface of the rim (1), and the diameter of the outer circumferential surface of the connecting ring (10) is smaller than or equal to the maximum outer diameter of a hump (5) of the rim (1).

7. A noise dampening hub to facilitate adjustment of dynamic balance as defined in claim 1, wherein: and a sealing layer (13) is also arranged between the silencing convex ring and the inner circumferential surface of the rim (1), and the sealing layer (13) is provided with matched through holes (14) corresponding to the notches of the silencing grooves (12).

8. A noise dampening hub to facilitate adjustment of dynamic balance as defined in claim 1, wherein: the outer sides of the groove walls of the silencing grooves (12) are provided with cavities (15), the widths of the cavities (15) between every two adjacent silencing grooves (12) are equal, and the width of the cavity (15) on one side, back to other silencing grooves (12), of the row of silencing grooves (12) on the outermost side is smaller than the width of the cavity (15) between every two adjacent silencing grooves (12).

9. A sound damping hub as defined in claim 8 for facilitating adjustment of dynamic balance, wherein: the cavity bottom of the cavity (15) is flush with the lowest groove bottom in the silencing groove (12).

10. A noise dampening hub to facilitate adjustment of dynamic balance as defined in claim 1, wherein: when the silencing convex ring comprises silencing boxes (7) and counterweight boxes (8), at least one counterweight box (8) is arranged between every two adjacent silencing boxes (7), the radians of the silencing boxes (7) are equal, the radians of the counterweight boxes (8) are equal, and the radians of the silencing boxes (7) are N times of that of the counterweight boxes (8), wherein N is an integer greater than 1; when the silencing convex ring is completely composed of the silencing boxes (7), M silencing boxes (7) are sequentially spliced end to end, wherein M is an integer more than or equal to 3.

Technical Field

The invention relates to the technical field of a silencing hub for a vehicle, in particular to a silencing hub convenient for adjusting dynamic balance.

Background

It is known that air column resonance generated in a tire air chamber formed between a tire and a rim of a wheel hub becomes a factor of load noise of an automobile. The air column resonance is a resonance phenomenon that random excitation input transmitted from a road surface to a tire tread during running vibrates air in a tire air chamber and occurs in the vicinity of a resonance frequency of the tire air chamber. Due to this resonance phenomenon, air column resonance noise is generated in the tire air chamber. The air column resonance noise is transmitted to the vehicle body via the suspension, and is sensed as load noise in the vehicle. As a hub for reducing such load noise, there have been proposed various structures provided with a helmholtz resonator having a sub air chamber communicating with a tire air chamber via a communication hole. However, when the hub rotates, a shock excitation input is generated to the tire when the tire tread is in contact with the ground. The prior solutions generally provide sound attenuation by adding a helmholtz resonator to the outer circumferential surface of the hub. However, this causes two problems, first, the helmholtz resonator is additionally fixed to the outer circumferential surface of the rim, and the helmholtz resonator may be separated from the hub and fall into the tire as the hub rotates and vibrates during the running of the vehicle; once the Helmholtz resonator falls into the tire, the Helmholtz resonator loses the silencing effect, and the Helmholtz resonator jumps along with the rotation of the wheel in the tire, so that the noise of the tire is increased, and the potential safety hazard of damaging the tire is also reduced; in addition, the added Helmholtz resonator is additionally fixed on the outer circumferential surface of the rim through some fixing modes, so that the motive balance of the hub is damaged; once the dynamic balance is damaged, the wheel body can vibrate more during the running process; and then further improved the hidden danger that helmholtz resonator and wheel hub drop the separation. The Helmholtz resonator must be replaced for maintenance and the tire removed from the hub before it can be operated. After the helmholtz resonator is installed and maintained, a tire needs to be installed and dynamic balance adjustment needs to be carried out, if the dynamic balance test is not ideal, the tire needs to be separated from the hub again, the operation is very complicated, the installation angle of the tire cannot be completely the same as that of the previous installation after the tire is installed every time, and the dynamic balance is influenced after the relative angle between the tire and the hub is changed because the tire is not absolutely symmetrical, so that the dynamic balance adjustment before the tire is installed deviates from that after the tire is installed, and the dynamic balance adjustment efficiency is low.

Disclosure of Invention

The invention aims to: the noise reduction hub is characterized in that a noise reduction convex ring is fixed on the inner circumferential surface of a rim, and the noise reduction convex ring is formed by sequentially connecting a plurality of noise reduction boxes and a plurality of balance weight boxes in an initial position, so that the dynamic balance can be adjusted by adjusting the noise reduction boxes and the balance weight boxes without removing a tire, and the noise reduction boxes or the balance weight boxes can be maintained or replaced without removing the tire, and the operation is convenient; the positioning convex ring arranged on the inner circumferential surface of the rim is convenient for quick positioning, mounting and fixing of the silencing box or the counterweight box; cavities are respectively arranged on two sides of the silencing groove, so that the influence on silencing of adjacent silencing grooves caused by the vibration of the groove wall when the silencing groove silences is avoided; the cavity bottom height of the cavity is flush with the lowest groove bottom in the groove bottoms of the silencing grooves adjacent to the cavity, so that the silencing effect of the silencing grooves adjacent to the cavity is ensured; through the arrangement of the sealing layer, the groove wall of the silencing groove is sealed with the inner wall of the sleeve, so that the silencing groove is only communicated with the corresponding through hole, and the silencing effect is ensured; but also can avoid the compressed gas in the tire from escaping from the space between the weight box and the inner wall of the rim; the connecting and fixing strength of the silencing box and the balance weight box and the rim is ensured through the action of the connecting ring; in addition, when the connecting ring threads are abraded due to the fact that the fixing bolts are screwed and unscrewed for multiple times, connection and replacement can be directly replaced, and therefore the fixed connection effect of the silencing box and the balance weight box with the rim can be guaranteed all the time; the inner diameter of the silencing convex ring is larger than that of a tire mounting groove of the rim, so that the silencing convex ring is prevented from influencing the installation of the wheel hub and the wheel shaft of the vehicle; the positioning convex ring is arranged at the position of the joint of the tire assembling groove and the rim, so that the width of the silencing convex ring is increased as much as possible, a plurality of rows of silencing grooves are formed as much as possible, and the noises of various audios are eliminated as much as possible; the radian of the silencing box is an integral multiple of the radian of the counterweight box which is larger than 1, and the counterweight cavity in the counterweight box is empty or fixed with counterweight medium, so that the dynamic balance can be adjusted in multiple modes, and the wheel is more convenient to perform dynamic balance adjustment on the premise of not removing the tire.

The technical scheme adopted by the invention is as follows:

the noise reduction hub convenient for adjusting dynamic balance comprises a hub body, the hub body comprises a rim and a spoke which are fixed with the same axle center, the outer circumferential surface of the rim is provided with a tire mounting surface, a tire mounting groove and a tire mounting surface in sequence and coaxially along the direction far away from the spoke, the tyre installing surface is symmetrically arranged by taking the section of the axial midpoint of the spoke as a symmetrical surface, a silencing convex ring is fixedly arranged on the inner circumferential surface of the rim and on one side of the tyre installing groove opposite to the spoke through a fixing bolt, the silencing convex ring is formed by sequentially ending and splicing a plurality of silencing boxes or a plurality of silencing boxes and a plurality of counterweight boxes, the positions, corresponding to the convex rings, of the circumferential surface of the rim are respectively and uniformly provided with a plurality of rows of through holes, the plurality of rows of silencing grooves formed in the silencing box are respectively and independently communicated with the vent holes at the corresponding positions to form Helmholtz resonators, and the vent holes at the corresponding positions are blocked by the end face, facing the rim, of the counterweight box.

The invention has the further improvement scheme that a positioning convex ring is coaxially arranged on the inner circumferential surface of the rim, and one side of the silencing convex ring facing the spoke is in contact positioning with the positioning convex ring.

In a further improvement of the invention, the positioning convex ring is arranged on the inner circumferential surface of the rim and is positioned on one side of the tire installing groove, which faces away from the spoke.

In a further improvement of the invention, the positioning convex ring is arranged at the position of the joint of the tire assembling groove and the rim.

In a further improvement of the invention, the silencing convex ring is provided with connecting flanges on the end surface of one side facing the inner circumferential surface of the rim and on the edges of one side facing the spoke and the side opposite to the spoke, and the fixing bolts respectively penetrate through the connecting flanges and then are fixedly connected with the rim.

In a further improvement of the present invention, a connection ring is fixedly connected to the outer circumferential surface of the rim at a position corresponding to the fixing bolts, and the connection ring is provided with matching threaded holes corresponding to the fixing bolts.

The invention has the further improvement scheme that the connecting ring is fixedly connected in an annular connecting groove correspondingly arranged on the outer circumferential surface of the rim, and the diameter of the outer circumferential surface of the connecting ring is smaller than or equal to the maximum outer diameter of a hump of the rim.

According to a further improvement scheme of the invention, when the silencing convex ring is fixed by the fixing bolt, the distance between the end part of the fixing bolt extending outwards out of the rim and the axle center of the rim is less than or equal to the maximum radius of the hump of the rim.

In a further improvement of the invention, a sealing layer is arranged between the silencing convex ring and the inner circumferential surface of the rim, and the sealing layer is provided with matched through holes corresponding to the notches of the silencing grooves.

In a further development of the invention, the sealing layer extends to the outer edge of the connecting flange, and the fastening screw is fastened to the rim after passing through the sealing layer.

According to a further improvement scheme of the invention, the outer sides of the groove walls of the silencing grooves are provided with cavities, the widths of the cavities between two adjacent silencing grooves are equal, and the width of the cavity on one side of the row of silencing grooves at the outermost side, which is back to other silencing grooves, is smaller than the width of the cavity between two adjacent silencing grooves.

In a further development of the invention, the cavity bottom of the cavity is flush with the lowest groove bottom of the damping grooves.

According to a further improvement of the invention, the silencing grooves in the same row are uniformly distributed along the radian direction of the silencing box.

According to a further improvement of the invention, when the silencing grooves are arranged in a plurality of rows, the silencing grooves in each row are distributed along the axial direction of the rim.

In a further improvement of the invention, the silencing frequency of the silencing grooves in the same row is the same, and the silencing frequency of the silencing grooves in each row increases along the direction facing the spoke.

According to a further improvement scheme of the invention, when the silencing convex ring comprises silencing boxes and counterweight boxes, at least one counterweight box is arranged between every two adjacent silencing boxes, the radians of the silencing boxes are equal, the radians of the counterweight boxes are equal, and the radians of the silencing boxes are N times of that of the counterweight boxes, wherein N is an integer greater than 1; when the silencing convex ring is completely composed of the silencing boxes, M silencing boxes are sequentially spliced end to end, wherein M is an integer larger than or equal to 3.

In a further improvement scheme of the invention, a counterweight cavity is arranged in the counterweight box, and a counterweight medium is arranged or fixed in the counterweight cavity in a vacant way.

In a further improvement of the invention, the inner diameter of the sound attenuation convex ring is larger than the inner diameter of the tire mounting groove of the rim.

According to a further improved scheme of the invention, the center of the spoke is also provided with a central hole, and a plurality of mounting holes are uniformly distributed around the central hole.

The invention has the beneficial effects that:

first, the noise reduction hub convenient for adjusting dynamic balance of the present invention is convenient to operate because the noise reduction convex ring is fixed on the inner circumferential surface of the rim and is formed by sequentially connecting the plurality of noise reduction boxes and the plurality of balance weight boxes in an initial position, and thus dynamic balance can be adjusted by adjusting the noise reduction boxes and the balance weight boxes without removing tires, and the noise reduction boxes or the balance weight boxes can be maintained or replaced without removing tires.

Secondly, the silencing wheel hub convenient for adjusting dynamic balance is convenient for quick positioning, installation and fixation of the silencing box or the counterweight box through the positioning convex ring arranged on the inner circumferential surface of the wheel rim.

And thirdly, the two sides of the silencing groove are respectively provided with the cavity, so that the silencing of the adjacent silencing groove is prevented from being interfered when the groove wall vibrates during silencing of the silencing groove.

Fourthly, according to the silencing wheel hub convenient for adjusting dynamic balance, the cavity bottom height of the cavity is flush with the lowest groove bottom in the groove bottoms of the silencing grooves adjacent to the cavity, so that the silencing effect of the silencing grooves adjacent to the cavity is guaranteed.

Fifthly, according to the silencing hub convenient for adjusting dynamic balance, the groove wall of the silencing groove is sealed with the inner wall of the sleeve through the arrangement of the sealing layer, so that the silencing groove is only communicated with the corresponding through hole, and the silencing effect is ensured; and the compressed gas in the tire can be prevented from escaping from the space between the weight box and the inner wall of the rim.

Sixth, the silencing hub convenient for adjusting dynamic balance of the invention ensures the connection and fixation strength of the silencing box and the balance weight box with the rim through the action of the connecting ring; in addition, when the connecting ring is worn due to the fact that the fixing bolt is screwed and unscrewed for multiple times, connection and replacement can be directly replaced, and therefore the fixed connection effect of the silencing box and the balance weight box with the rim can be guaranteed all the time.

Seventhly, the inner diameter of the silencing convex ring is larger than that of the tire mounting groove of the rim, so that the silencing convex ring is prevented from influencing the installation of the hub and a vehicle wheel shaft.

Eighth, according to the noise reduction hub convenient for adjusting dynamic balance, the positioning convex ring is arranged at the position of the connection position of the tire assembling groove and the rim, so that the width of the noise reduction convex ring is increased as much as possible, a plurality of rows of noise reduction grooves are formed as much as possible, and noises of various audios are eliminated as much as possible.

Ninth, the radian of the silencing box is an integral multiple of the radian of the counterweight box which is larger than 1, and the counterweight cavity in the counterweight box is empty or fixed with counterweight medium, so that the dynamic balance can be adjusted in various ways, and the dynamic balance adjustment of the wheel is more convenient on the premise of not removing the tire.

Description of the drawings:

FIG. 1 is a schematic front cross-sectional view of the present invention.

Fig. 2 is a front cross-sectional view of fig. 1 rotated 45 degrees about the hub axis.

The specific implementation mode is as follows:

as can be seen from the combination of the figures 1 and 2, the noise reduction hub convenient for adjusting dynamic balance comprises a hub body, wherein the hub body comprises a rim 1 and a spoke 2 which are coaxially fixed, a tire installing surface 4, a tire installing groove 3 and a tire installing surface 4 are sequentially and coaxially arranged on the outer circumferential surface of the rim 1 along the direction far away from the spoke 2, the tire installing surface 4 is symmetrically arranged by taking the section of the axial midpoint of the spoke 2 as a symmetrical plane, a noise reduction convex ring is fixedly arranged on the inner circumferential surface of the rim 1 and on one side of the tire installing groove 4 opposite to the spoke 2 through a fixing bolt 11, the noise reduction convex ring is formed by sequentially closing and splicing a plurality of noise reduction boxes 7 or a plurality of noise reduction boxes 7 and a plurality of counterweight boxes 8, a plurality of rows of through holes 6 are respectively and uniformly arranged on the circumferential surface of the rim 1 and at positions corresponding to the convex ring, and a plurality of rows of noise reduction grooves 12 arranged on the noise reduction boxes 7 are respectively and independently communicated with vent holes 6 at the corresponding positions respectively, Forming a Helmholtz resonator, the end surface of the weight box 8 facing the rim 1 blocks the vent hole 6 at the corresponding position.

And a positioning convex ring 4 is coaxially arranged on the inner circumferential surface of the rim 1, and one side of the silencing convex ring facing the spoke 2 is in contact positioning with the positioning convex ring 4.

The positioning convex ring 4 is arranged on the inner circumferential surface of the rim 1 and is positioned on one side of the tyre assembling groove 3, which is opposite to the spoke 2.

The positioning convex ring 4 is arranged at the position of the joint of the tire assembling groove 3 and the rim 1.

The side end face of the silencing convex ring facing the inner circumferential surface of the rim 1 and the side edges facing the spoke 2 and back to the spoke 2 are respectively provided with a connecting flange 9, and the fixing bolts 11 respectively penetrate through the connecting flanges 9 and then are fixedly connected with the rim 1.

The outer circumference of the rim 1 is fixedly connected with a connecting ring 10 at a position corresponding to the fixing bolt 11, and the connecting ring 10 is respectively provided with matched threaded holes corresponding to the fixing bolt 11.

The connecting ring 10 is fixedly connected in an annular connecting groove correspondingly arranged on the outer circumferential surface of the rim 1, and the diameter of the outer circumferential surface of the connecting ring 10 is smaller than or equal to the maximum outer diameter of the hump 5 of the rim 1.

When the sound attenuation convex ring is fixed by the fixing bolts 11, the distance between the end part of the fixing bolt 11 extending outwards out of the rim 1 and the axle center of the rim 1 is smaller than or equal to the maximum radius of the hump 5 of the rim 1.

A sealing layer 13 is arranged between the silencing convex ring and the inner circumferential surface of the rim 1, and the sealing layer 13 is provided with matched through holes 14 corresponding to the notches of the silencing grooves 12.

The sealing layer 13 extends to the outer edge of the connecting flange 9, and the fixing bolt 11 is fixed to the rim 1 after penetrating the sealing layer 13.

The outer sides of the groove walls of the silencing grooves 12 are provided with cavities 15, the widths of the cavities 15 between two adjacent silencing grooves 12 are equal, and the width of the cavity 15 on one side of the row of the silencing grooves 12 at the outermost side, which is back to other silencing grooves 12, is smaller than the width of the cavity 15 between two adjacent silencing grooves 12.

The cavity bottom of the cavity 15 is flush with the lowest groove bottom of the silencing grooves 12.

The silencing grooves 12 in the same row are uniformly distributed along the arc direction of the silencing box 7.

When the silencing grooves 12 are provided in a plurality of rows, the silencing grooves 12 in each row are distributed along the axial direction of the rim 1.

The muffling frequencies of the muffling grooves 12 in the same row are the same, and the muffling frequencies of the muffling grooves 12 in each row increase in the direction facing the spokes 2.

When the silencing convex ring comprises the silencing boxes 7 and the counterweight boxes 8, at least one counterweight box 8 is arranged between every two adjacent silencing boxes 7, the radians of the silencing boxes 7 are equal, the radians of the counterweight boxes 8 are equal, and the radians of the silencing boxes 7 are N times of that of the counterweight boxes 8, wherein N is an integer greater than 1; when the silencing convex ring is completely composed of the silencing boxes 7, M silencing boxes 7 are required to be sequentially spliced end to end, wherein M is an integer larger than or equal to 3.

In this embodiment, when the silencing convex ring is composed of all the silencing boxes 7, 8 silencing boxes 7 are required to be spliced end to end in sequence, and the radian of each silencing box 7 is 3 times that of each counterweight box 8; in addition, in this embodiment, the silencing convex ring is formed by splicing 4 silencing boxes 7 and 12 counterweight boxes 8 according to the sequence of splicing 3 counterweight boxes 8 between every two adjacent silencing boxes 7.

A counterweight cavity 18 is arranged in the counterweight box 8, and counterweight media are arranged or fixed in the counterweight cavity 18 in a vacant way.

The inner diameter of the noise-reduction convex ring is larger than that of the tire mounting groove 3 of the rim 1.

The center of the spoke 2 is also provided with a center hole 16, and a plurality of mounting holes 17 are uniformly distributed around the center hole 16.

In this embodiment, 5 mounting holes 17 are uniformly distributed around the central hole 16.

During assembly production, the vent holes 6 of the rim 1, the connecting flanges 9, the threaded holes of the rim 1 and the connecting ring 10 are processed in a hole shape, the annular connecting grooves of the rim 1 corresponding to the connecting ring 10, the silencing grooves 12 and the cavity 15 are processed in a groove shape, the processing technology is common and common, the processing production is convenient, and the production cost is low.

When the dynamic balance needs to be adjusted, firstly, according to the noise volume of the tire, a proper number of silencing boxes 7 are selected and uniformly distributed and fixed on the inner circumferential surface of the rim 1 by taking the axis of the rim 1 as the center, and a corresponding number of counterweight boxes 8 are sequentially fixed between every two adjacent silencing boxes 7; then, a tire is fixedly arranged on the outer circumferential surface of the rim 1, and then a dynamic balance test is carried out, if the result of the dynamic balance test is not ideal, the balance weight box 8 with different balance weight media can be replaced by the balance weight box 8 at the corresponding position, or the balance weight box 8 with different balance weight media at the corresponding position is replaced, and the dynamic balance test is carried out again; until finally the dynamic balance test can be passed.