Friction wheel

Abstract

The utility model relates to the technical field of manufacturing of table tennis ball serving equipment, in particular to a friction wheel which is reasonable in structure, light in weight, stable in rotating posture and capable of effectively improving the ball serving quality of the table tennis ball serving equipment. The wheel is characterized in that a hollow hole is formed in the wheel rim, the rubber ring comprises an outer ring layer arranged on the wheel rim in a sleeving mode and an embedding part embedded into the hollow hole, and compared with the prior art, the wheel has the remarkable advantages of being reasonable in structure, low in cost, high in working stability and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to table tennis ball serving equipment manufacturing technical field, specifically a kind of structure reasonable, light in weight, rotating posture is stable, can effectively improve the friction wheel of table tennis ball serving equipment ball quality. BACKGROUND

[0002] Ball head mechanism of serving machine is the key component of table tennis ball serving equipment, it includes the friction wheel being arranged at the ball outlet, is rotated by the drive of two friction wheels located at the ball outlet, provides different launch speed, rotation etc. Attitude parameters for the table tennis ball sent by the ball outlet, to obtain different characteristics of serving route.

[0003] The existing structure of friction wheel includes hub and rubber ring, rubber ring is sleeved on the circumferential surface of hub, when friction wheel rotates at high speed, rubber ring is in contact with the surface of table tennis ball, obviously, in order to improve the serving quality of serving equipment, friction wheel needs to meet the requirements of high speed and high stability when contacting with table tennis ball, since rubber ring on the circumferential surface of hub frequently contacts with the body of table tennis ball when friction wheel rotates at high speed, heat generated by friction is easy to cause rubber ring deformation, even separate from hub, and then lead to the decline of serving quality, in addition, the existing friction wheel structure still has the problems of large overall weight of friction wheel and large rotating wind resistance. SUMMARY

[0004] The utility model discloses a kind of structure reasonable, light in weight, rotating posture is stable, can effectively improve the friction wheel of table tennis ball serving equipment ball quality.

[0005] The utility model reaches by the following measures:

[0006] A kind of friction wheel, is equipped with friction wheel framework and rubber ring, the friction wheel framework includes the circular ring rim for supporting and fixing rubber ring, it is characterized in that, hollow hole is set on the rim, the rubber ring includes the outer ring layer being sleeved on the rim and the embedded part being embedded into hollow hole.

[0007] The rubber ring also includes annular inner ring layer on the inner side of rim, the inner ring layer is connected with outer ring layer through embedded part, further, the inner ring layer of rubber ring, embedded part and outer ring layer are one-piece structure, to effectively improve the bonding force of rubber ring and friction wheel framework, ensure that rubber ring, especially the outer ring layer for contacting with the body of table tennis ball, is always closely attached to the circumferential surface of rim under high-speed rotating state.

[0008] The utility model discloses the wheel rim is provided with two or more than two hollow holes, and the hollow hole is provided on the rim wall edge or the middle line of the wheel rim, further, the circular or rectangular hollow hole is provided on the rim wall two side edges and the middle line of the wheel rim respectively, so that the rim body of the rubber ring can be maximized to be attached to the rim wall.

[0009] The utility model discloses the friction wheel framework is further provided with the driving shaft connecting portion for being connected with the friction wheel drive mechanism, and the driving shaft connecting portion is arranged along the central axis of the wheel rim and is in the form of a shaft sleeve, is used for being connected with the external driving shaft, and the outer side of the driving shaft connecting portion is provided with two or more than two support ribs, and the support rib is distributed radially around the shaft sleeve-shaped driving shaft connecting portion, and the terminal is connected with the inner wall of the wheel rim, further, the support rib is all arranged on the same side edge of the wheel rim, and the driving shaft connecting portion is located at the outside of the rim body of the wheel rim, through the radial support rib of setting, can effectively improve the stability of the wheel rim, avoids the heat deformation under the friction of high speed operation, and leads to the deformation of the rubber ring supported.

[0010] Compared with the prior art, the utility model discloses the structure of changing the friction wheel framework and the rubber ring, reduces the overall weight of the friction wheel, so that the friction wheel can adapt to the high speed rotation demand, and through the test, the structure of the application friction wheel can reach 10000 rotations per minute, in addition, the special structure of the friction wheel framework can improve the stability of the rubber ring under the high temperature working condition due to the high speed rotation and the frequent contact with the ping pong ball body, makes the rubber ring flat and close to the surface of the annular wheel rim, and guarantees the quality of the ball.

[0011] Compared with the prior art, the utility model has reasonable structure, low cost, stable working, and higher significant advantages such as. DRAWINGS

[0012] ATTACH Figure 1 It is the structure schematic diagram of the utility model.

[0013] ATTACH Figure 2 It is a structure schematic diagram of the friction wheel framework in the utility model.

[0014] ATTACH Figure 3 It is the section schematic diagram of the utility model.

[0015] ATTACH Figure 4 It is a structure schematic diagram of the friction wheel framework in the embodiment 3 of the utility model.

[0016] FIG. rubber ring 2, wheel rim 3, hollow hole 4, inner ring layer 5, driving shaft connecting portion 6, support rib 7, support plate 8. CONCRETE IMPLEMENTATION

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Example 1:

[0019] This example provides a solution as shown in the appendix. Figure 1 The friction wheel shown has a friction wheel frame 1 and a rubber ring 2. The friction wheel frame 1 includes an annular wheel rim 3 for supporting and fixing the rubber ring. The wheel rim 3 has a hollow hole 4. The rubber ring 2 includes an outer ring layer sleeved on the wheel rim 3 and an fitting part fitted into the hollow hole.

[0020] In this example, the wheel rim 3 has two or more equally spaced perforated holes 4. The perforated holes 4 are circular or rectangular and are located on the edge of the rim wall or the centerline of the wheel rim 3, as shown in the attached figure. Figure 2 As shown, in this example, circular or rectangular perforations are made on both sides of the rim wall and on the center line of the rim 3, so as to ensure that the rim body of the rubber ring can fit the rim wall to the maximum extent.

[0021] The friction wheel frame 1 described in this example is also provided with a drive shaft connecting part 6 for connecting to the friction wheel drive mechanism. The drive shaft connecting part 6 is arranged along the central axis of the wheel rim 3 and is in the shape of a bushing. It is used to connect to an external drive shaft. Two or more support ribs 7 are provided on the outer side of the drive shaft connecting part 6. The support ribs 7 are radially distributed around the bushing-shaped drive shaft connecting part 6 and their ends are connected to the inner wall of the wheel rim. By setting radial support ribs, the stability of the wheel rim can be effectively improved, and it can be prevented from deforming due to heat under high-speed friction, which would cause the rubber ring supporting it to deform.

[0022] Example 2:

[0023] This example provides a friction wheel for a table tennis serving device, which includes a friction wheel frame 1 and a rubber ring 2. The friction wheel frame 1 includes an annular wheel rim 3 for supporting and fixing the rubber ring. The wheel rim 3 has a hollow hole 4. The rubber ring 2 includes an outer ring layer sleeved on the wheel rim 3 and an fitting part that fits into the hollow hole.

[0024] The rubber ring 2 described in this example also includes an annular inner ring layer 5 located inside the rim 3. The inner ring layer 5 is connected to the outer ring layer via an interlocking part. The inner ring layer, the interlocking part, and the outer ring layer of the rubber ring 2 are an integral structure, thereby effectively improving the bonding force between the rubber ring 2 and the friction wheel frame 1, and ensuring that the rubber ring 2, especially the outer ring layer that is in contact with the ping-pong ball, is always in close contact with the outer circumferential surface of the rim under high-speed rotation.

[0025] The friction wheel framework 1 of the example is also provided with a driving shaft connecting part 6 for connecting with a friction wheel driving mechanism, the driving shaft connecting part 6 is arranged along the central axis of the rim 3, is in the form of a shaft sleeve, is used for connecting with an external driving shaft, and the outer side of the driving shaft connecting part 6 is provided with two or more support ribs 7, the support ribs 7 are distributed radially around the shaft sleeve-shaped driving shaft connecting part 6, and the ends are connected with the inner wall of the rim, and the stability of the rim can be effectively improved by arranging the radial support ribs, so that the rim is prevented from being deformed due to heat under high-speed friction, thereby causing the rubber ring supported by the rim to be deformed.

[0026] Embodiment 3:

[0027] The example provides a friction wheel for a table tennis serving device, in order to ensure the strong support of the friction wheel framework, that is, in order to ensure that the rim 3 always maintains a regular circular shape during continuous high-speed rotation, a support frame for avoiding deformation of the rim 3 is arranged on the inner side of the rim 3, the support frame is composed of two or more support plates 8 arranged radially along the center of the rim 3, and the support frame of the example is in the form of a cross as shown in the accompanying drawings. Figure 4 The support frame is in the form of a cross, and the support plates 8 in the support frame are located in the same plane, and the outer side of the support plate is connected with the support rib 7.

[0028] Compared with the prior art, the structure of the friction wheel framework and the rubber ring is changed, the overall weight of the friction wheel is reduced, so that the friction wheel can adapt to the high-speed rotation requirement, and the friction wheel structure of the application can reach 10,000 revolutions per minute through testing, in addition, the special structure of the friction wheel framework can improve the stability of the rubber ring under high-temperature working conditions caused by high-speed rotation and frequent contact with the table tennis ball body, so that the rubber ring is flat and closely attached to the surface of the annular rim, and the ball quality is ensured.

[0029] Compared with the prior art, the utility model has the advantages of reasonable structure, low cost, high working stability and the like.

Claims

1. A friction wheel provided with a friction wheel skeleton and a rubber ring, the friction wheel skeleton comprising a circular ring shaped rim for supporting and fixing the rubber ring, characterized in that, The wheel rim is provided with hollow holes, and the rubber ring comprises an outer ring layer sleeved on the wheel rim and an embedded part embedded in the hollow holes.

2. A friction wheel according to claim 1, wherein The rubber ring further comprises an annular inner ring layer on the inner side of the wheel rim, and the inner ring layer is connected with the outer ring layer through the embedded part, and the inner ring layer, the embedded part and the outer ring layer are integrated.

3. A friction wheel according to claim 2, wherein The wheel rim is provided with two or more hollow holes at equal intervals, and the hollow holes are circular or rectangular, and are arranged on the edge or the center line of the wheel rim.

4. A friction wheel according to claim 3, wherein The friction wheel framework is further provided with a driving shaft connecting part connected with the driving mechanism of the friction wheel, the driving shaft connecting part is arranged along the central axis of the wheel rim and has a sleeve shape, is connected with the external driving shaft, and the outer side of the driving shaft connecting part is provided with two or more supporting ribs, the supporting ribs are distributed radially around the sleeve-shaped driving shaft connecting part, and the terminal ends are connected with the inner wall of the wheel rim.

5. A friction wheel according to claim 4, wherein A supporting frame for avoiding deformation of the wheel rim is arranged on the inner side of the wheel rim, and the supporting frame comprises two or more supporting plates arranged radially along the center of the wheel rim, and the supporting plates are arranged on the same plane, and the outer side of the supporting plate is connected with the supporting rib.

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