KR102025241B1 - Ball Launcher - Google Patents

Abstract

The present invention relates to a ball launcher which launches a ball forwards by entering the ball between a pair of drive wheels rotating by a drive motor. The ball launcher has a shaft reinforcement (100) including a reinforcement shaft (130) of which a lower part is combined with the outside of a motor shaft (204) while surrounding the same in order to rotate together with the motor shaft (204) of the drive motor (200) and an upper part is combined with a wheel shaft hole (86) so as to rotate together with the drive wheels (80). A one-way clutch bearing (140) is interposed between the combined motor shaft (204) and reinforcement shaft (130). An upper protection plate (60) is installed on the upper part between the upper plates (51) of casings (50) surrounding the drive wheels (80). The present invention has effects of: preventing problems of breakage or deformation since a motor shaft is not overloaded; being able to always shoot a ball forwards even if there is a significant difference in a rotating speed between the drive wheels; and preventing a ball from bouncing upwards when the ball mistakenly enters between the rotating drive wheels.

Description

Ball Launcher

The present invention relates to a ball launcher capable of entering a ball between a pair of drive wheels and flying in a desired direction and speed, and more particularly, to reinforce the motor shaft strength of the drive motor for rotating the drive wheels, A ball launcher having means for preventing the escape of a ball entering between drive wheels.

In general, the training of the players in the ball game is handled by a ball thrown or kicked by an assistant, such as a coach or coach.

However, when a person throws or kicks a ball, it is difficult to keep repeating the ball in the same direction and speed.

For this reason, several types of launching devices have been developed that can launch the ball homogeneously instead of a human, such as a reciprocating launching device that rotates by hitting or pushing the ball by using spring force or hydraulic cylinder force. There is a rotary launcher to get thrust by passing the ball between a pair of wheels.

Conventional rotary launch devices include Korean Patent Publication No. 10-2015-0146137, Korean Patent Registration No. 10-1677688, Korean Patent Registration No. 10-1721553, and the like.

The prior art has a common feature of coupling the motor shaft of the drive motor to the center of the wheel to transfer the driving force of the drive motor directly to the wheel.

However, since the gap between the rotating wheel and the wheel is smaller than the diameter of the passing ball, when the ball passes, the pair of wheels are strongly pushed in the opposite direction to the ball. And since this force is transmitted as it is to the motor shaft inserted in the center of the wheel, the problem often occurs that the motor shaft is broken or deformed.

And when there is a big difference in the rotational speed of the wheel and the wheel, there is a case that the rotational force of the wheel that rotates at a low speed can not beat the rotational force of the entered ball. In this case, the wheel that rotates at a low speed may reverse, causing the ball not to fire properly or the motor to fail.

On the other hand, in the prior art, when the ball enters between a pair of rotating wheels, the ball does not get caught properly between the wheels, but also often occurs upwards, there is also a problem that people around you are easily injured.

Korea Patent Publication No. 10-2015-0146137 Korea Patent Registration No. 10-1677688 Korea Patent Registration No. 10-1721553

The present invention is to solve the above problems, to provide a ball launcher that can prevent the damage or deformation of the motor shaft by receiving a pushing force acting on the drive wheel by the ball to a separate shaft reinforcement instead of the motor shaft. The purpose.

It is another object of the present invention to provide a ball launcher having a drive wheel rotation structure capable of always firing the entered ball forward even when the pair of driving wheels have a large difference in rotation speed from each other.

Another object is to provide a ball launcher having means for preventing the ball from bouncing upwards as it enters between a pair of rotating drive wheels.

In order to solve the above problems, the present invention, in the ball launcher for launching the ball forward by entering the ball between the pair of drive wheels that are rotated by the drive motor, the lower portion of the motor to rotate with the motor shaft of the drive motor A shaft reinforcement is provided that surrounds and engages the outside of the shaft, and the upper portion includes a reinforcement shaft coupled to the wheel shaft bore to rotate with the drive wheel.

At this time, the shaft reinforcement is preferably configured to include a housing that surrounds the outer coupling of the reinforcement shaft and the bearing interposed between the reinforcement shaft and the housing.

In addition, it is more preferable to interpose the one-way clutch bearing between the coupling motor shaft and the reinforcement shaft.

The shaft reinforcement is connected to the support plate to be fixed, so that external force acting on the shaft reinforcement is distributed to the support plate.

And the shaft upper diameter of the reinforcement shaft directly receiving the lateral pressure of the drive wheel is formed larger than the diameter of the motor shaft, so as to have a stronger strength than the motor shaft.

And the upper surface of the drive motor, the motor shaft penetrates to the center and forms a fixing bracket in which the projection is formed at a predetermined distance from the motor shaft, the lower plate of the support plate and the casing, the drive motor is installed downward It is preferable to form a bracket coupling hole so that the outer surface of the fitting projection of the fixing bracket is in contact with the inner peripheral surface of the bracket coupling hole when the driving motor is coupled.

On the other hand, the present invention is a ball launcher for launching the ball forward by entering the ball between the pair of drive wheels that are rotated by the drive motor, the outer side of the pair of drive wheels to the casing consisting of the top plate, bottom plate and side plate Each wraps, and an upper protective plate is installed at an upper portion between the upper plates of the casings.

According to the present invention, since the pushing force received by the pair of driving wheels is hardly transmitted to the motor shaft of the driving motor when the ball passes, there is an effect that the problem of the motor shaft being broken or deformed does not occur.

And the present invention has the effect that can always shoot the ball forward, even if there is a large difference between the rotation speed between the pair of drive wheels.

In addition, when the ball enters between a pair of driving wheels that rotate the ball, it is possible to prevent the ball that is not properly pinched between the wheels to bounce upwards, there is an effect of improving the safety of the user.

1 is a perspective view of a ball launcher in accordance with an embodiment of the present invention.
2 is an exploded perspective view of a ball launcher according to an embodiment of the present invention;
3 is an exploded perspective view of the lower side of the shaft reinforcement according to the embodiment of the present invention;
Figure 4 is an exploded perspective view of the upper side of the shaft reinforcement according to the embodiment of the present invention.
5 is a cross-sectional view of the shaft reinforcement according to the embodiment of the present invention.
6 is a conceptual view of operation of the ball launcher according to the embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention. However, the thickness of the lines or the size of the components shown in this figure may be exaggerated or reduced for convenience to more clearly understand the configuration of the present invention.

Terms used to describe the present invention are terms defined in consideration of functions in the present invention. However, since these terms may be expressed in other terms according to the intention or custom of the designer or the user, the definition of these terms used in the present invention should be made in consideration of the contents described throughout the present specification.

In addition, directionality such as' top ',' bottom ',' front ',' back ',' left, 'right', 'tip', 'front', 'back', 'rear', etc. used in the description of the present invention. The term is based on the orientation of the disclosed figure (s). However, since the components of the embodiments of the present invention may be positioned in various orientations, the directional terminology is used for the purpose of illustration and not limitation.

When the components used in the present invention are described as being 'connected', 'coupled' or 'fastened' with each other, it should be understood to include a case made by an indirect method through an intermediate intermediate component.

In the description of the present invention, well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

1 is a view showing the appearance of the ball launcher according to the present invention, the main configuration of the external appearance of the guide bar 10, the operation unit 20, the battery 30, the wheel 40, the casing 50, the upper protective plate ( 60), the backing plate 70, the driving wheel 80, and the like.

2 is a perspective view showing an exploded view of one drive wheel portion of a pair of drive wheels 80, wherein the axial reinforcement 100, which is a main feature of the present invention, is located between the drive wheel 80 and the drive motor 200. FIG. Show the intervening configuration.

The guide bar 10 consists of a pair of pipes arrange | positioned in parallel at predetermined intervals so that it does not fall between when a ball to be used is put up.

The pair of pipes is formed in such a way that the front side extends downward between the pair of driving wheels 80 to be fixedly coupled to the support plate 70, and is inclined and raised as a slide toward the rear side.

Therefore, when the ball is placed on the rear side of the guide bar 10, the ball is guided by a pair of pipes and rolls down between the pair of drive wheels 80.

And the rear end of the pair of pipes are configured to be connected to each other to perform the function of the handle at the same time.

The operation unit 20 is configured in a control box fixedly coupled to one pipe outside of the guide bar 10. The operation unit 20 includes a power switch, a drive motor rotation control switch, a remote control signal receiver, and the like, and includes a control unit for controlling the power and operation of the motor according to the signals received therefrom.

As shown in FIG. 2, the casing 50 is composed of an upper plate 51, a side plate 52, and a lower plate 53 surrounding the outside of the pair of drive wheels 80. The upper plate 51, the side plate 52 and the lower plate 53 are fastened by bolts using the coupling pieces 57, respectively, and the lower plate 53 is fixed on the support plate 70 by using bolts, etc. The whole 50 is assembled and installed on the support plate 70 in one cylindrical shape.

The casing 50 surrounds the outer portion of the drive wheel 80 to prevent the drive wheel 80 from being damaged by an external impact.

The lower plate 53 has a bracket coupling hole 55 formed in a circular shape, and the hole is connected between the drive motor 200 and the shaft reinforcement 100 to be described later. In addition, a plurality of through holes 56 are formed around the bracket coupling hole 55.

The upper protection plate 60 is installed above the upper plates 51 of the pair of casings 50 respectively surrounding the pair of drive wheels 80.

The upper protective plate 60 shown in FIG. 2 is an embodiment formed by bending an elongated plate. The upper protection plate 60 has a flat top surface 61 and a pair of side surfaces 62 which are inclined downwardly and extended from both ends of the top surface, and horizontally short at the ends of the pair of side surfaces 62, respectively. An extended engagement surface 63 is provided.

A fastening hole 64 is formed in the engaging surface 63, and a fastening hole 54 is formed at a position corresponding to the fastening hole 64 in the casing top plate 51, so that the upper protective plate 60 and the top plate are formed. It is configured so that the 51 can be fastened with a bolt.

The supporting plate 70 is formed of an elongated plate having a shape in which the center is recessed, and forms a shape in which wings are spread on both sides of the recess. On both sides of the support plate 70, the drive wheel 80, the casing 50 and the drive motor 200 are installed on the upper and lower surfaces, respectively.

In addition, both side wings of the support plate 70 is formed with a bracket engaging hole 55, respectively, the hole is formed in the same position at the same position as the bracket engaging hole 55 of the casing lower plate 53. The support plate 70 also has the same through hole at the same position as the through hole 56 of the casing lower plate 53.

The driving wheel 80 is installed one each on both sides of the support plate 70.

As shown in Figure 2, the driving wheel 80 of the present embodiment is formed in the form of a wheel, the central portion is protruding to form a central projection 84, the boss keyway (85-) in the center of the central projection (84) The boss 85 with 1) is lodged. A plurality of arms 83 extend radially outward from the central protrusion 84 to the rim 82.

The outer surface of the rim 82 is an outer shell 81 made of a material of good friction and elastic force, such as urethane is coupled. The surface of the shell 81 is formed with a concave surface corresponding to the convex surface of the ball.

When the pair of drive wheels 80 is rotated, the guide bar 10 guides the ball inserted between the pair of drive wheels 80 to forward.

2, the drive motor 200 is mounted to the bottom of the support plate (70).

A fixing bracket 201 is installed on the upper surface of the drive motor 200 for this mounting. The fixing bracket 201 has a motor shaft 204 penetrating the center thereof, protrudes the fitting protrusion 203 at a predetermined distance from the motor shaft 204, and forms fixing holes 202 at four corners. .

In this embodiment, the alignment protrusion 203 is formed in an annular shape, the outer surface of the alignment protrusion is formed in a size in contact with the inner circumferential surface of the bracket coupling hole 55 formed in the support plate (70). Therefore, when mounting the drive motor 200 in the lower portion of the support plate 70, it is possible to easily position the drive motor by fitting the fitting projection 203 to the bracket coupling hole 55.

The shaft reinforcement 100 shown in FIG. 2 is coupled to surround the outside of the motor shaft 204 so that the lower portion can rotate together with the motor shaft 204 of the drive motor 200, and the upper portion of the shaft reinforcement 100 is driven. ) Into the drive wheel shaft hole 86 so as to rotate together. That is, the shaft reinforcement 100 is an intermediate medium that transmits the rotational force of the motor shaft 204 to the drive wheel 80.

Next, the configuration of the shaft reinforcement 100 will be described in detail with reference to FIGS. 3 to 5.

The shaft reinforcement body 100 of the present invention is configured to include a housing interposed between the reinforcement shaft 130 and the reinforcement shaft 130 and a bearing interposed between the reinforcement shaft 130 and the housing.

In the embodiment of the present invention, the housing is divided into a lower housing 110 and an upper housing 111.

Referring to FIG. 3, the lower housing 110 has an outer surface formed in a hexahedral shape, and forms a space by drilling a hole toward the inside from the bottom surface thereof.

Referring to FIG. 4, the upper housing 111 is integrally formed on the upper portion of the lower housing 110 and has a cylindrical shape. At this time, the upper housing 111 also forms a space by drilling a hole toward the inside from the upper surface.

Since the space portion of the upper housing 111 and the space portion of the lower housing 110 communicate with each other, it is defined as the interior space 150 by combining the two space portions.

3 is an exploded perspective view of a component inserted into the lower housing 110 of the shaft reinforcement 100, Figure 5 is a coupling of the shaft reinforcement 100 coupled between the motor shaft 204 and the drive wheel (80). It is a cross-sectional view showing the structure.

3 and 5, the inner space 150 of the lower housing 110 includes a lower bearing 124, a reinforcement shaft 130, a one-way clutch bearing 140, and a bush 160. And motor shaft 204 is received.

In addition, the inner space 150 of the lower housing 110 is formed in two stages so that the narrower toward the inside, the jaw has a small inner diameter of the step is used as the lower bearing engaging jaw (126). That is, the lower bearing 124 to be inserted is set in the internal space 150 by hanging on the locking jaw (see FIG. 5).

The reinforcement shaft 130 is a rocket-shaped structure in which the outer diameter decreases in multiple stages from the bottom to the top.

In the reinforcement shaft 130, the upper portion having the smallest outer diameter is the upper portion of the shaft 134, the middle portion having a slightly larger outer diameter than the upper portion of the shaft is the middle portion 133, and the lower portion having the largest outer diameter is the lower shaft portion 132 Defined as

Since the spacing between the pair of drive wheels is smaller than the diameter of the passing ball, the ball passing between the pair of drive wheels generates a lateral pressure that pushes the drive wheels outward.

Since the lateral pressure is a cause of motor shaft breakage or deformation in the prior art, in the present invention, the diameter of the shaft upper portion 134 directly receiving the lateral pressure of the drive wheel has a stronger strength than the motor shaft 204, so that It is formed larger than the diameter of 204).

The bottom of the lower shaft 132 extends outward in a thin disk shape to form a stop jaw 131.

As shown in FIG. 5, the shaft upper hole 136 is formed in the longitudinal direction in the shaft upper portion 134, and an internal thread is formed in the inner surface of the hole. Inside the shaft lower portion 132 is formed a connection space 135 having an inlet at the bottom, in which the motor shaft 204 is connected to the shaft lower portion 132.

Figure 4 is a perspective view showing the separation of the upper bearing 114 is inserted into the interior space 150 of the upper housing 111.

And the inner space 150 of the upper housing 111 is provided with a step formed by making the inner diameter smaller than the inlet, this step is used as the upper bearing locking step 116 (see Fig. 5). That is, the upper bearing 124 to be inserted is set in the interior space 150 by hanging on the locking jaw.

On the other hand, the ring-shaped support ring 101 shown in Figure 4 is inserted into the upper reinforcement shaft (130). Around the inner diameter side of the support ring 101, a support ring protrusion 106 extending a predetermined length downward is formed (see Fig. 5).

The bearing ring 101 is interposed between the lower surface of the boss 85 of the drive wheel and the upper surface of the housing, and the bearing ring protrusion 106 is positioned on the rotating bearing inner ring.

The support ring 101 is installed to prevent the lower surface of the boss 85 and the upper portion of the housing from interfering with each other when the driving wheel 80 rotates.

A coupling configuration between the drive wheel 80, the shaft reinforcement 100, and the motor 200 will be described with reference to FIG. 5.

First, the fixing bracket 201 of the motor 200 is positioned at the lower portion of the bracket coupling hole 55 communicating with the support plate 70 and the casing lower plate 53. At this time, by fitting the outer surface of the fitting projection 203 of the fixing bracket to the inner peripheral surface of the bracket coupling hole 55, the mounting position of the motor can be easily found.

The bush 160 is coupled to the motor shaft 204 protruding upward from the bracket coupling hole 55. The motor shaft key groove 204-1 and the bush key groove 160-1 are formed in the motor shaft 204 and the bush 160, respectively, and can be coupled using the keys.

The motor shaft 204 coupled with the bush 160 may be coupled to the connection space 135 formed in the lower shaft 132 to couple the reinforcement shaft 130 to the motor shaft 204.

In the exemplary embodiment of the present invention, the one-way clutch bearing 140 is additionally coupled to the outer surface of the bush 160 and then fits into the connection space 135. The one-way clutch bearing 140 preferably uses a thin needle clutch bearing in consideration of the narrow connection space 135. The driving wheel of the present invention rotates only in one direction and does not rotate in the opposite direction by the action of the one-way clutch bearing.

In the exemplary embodiment of the present invention, the reinforcing shaft 130 coupled to the motor shaft 204 is configured in a form in which the outer diameter is reduced in a multistage while going from the bottom to the top, such a multistage configuration is not a requirement. That is, according to the size and shape of the motor shaft 204, the housing inner space 150, and the wheel shaft hole 86 of the drive wheel, etc., the reinforcement shaft 130 has only a straight or middle portion having the same upper and lower outer diameters. It can be variously modified into this decreasing dumbbell shape.

The housing is coupled to the outside of the reinforcement shaft 130 coupled to the motor shaft. At this time, the lower bearing 124 is interposed between the lower housing 110 and the lower shaft 132 of the reinforcement shaft, and the upper bearing 114 is interposed between the upper housing 111 and the shaft middle portion 133 of the reinforcement shaft. Accordingly, when the reinforcement shaft 130 rotates, the housing may be maintained in a fixed state.

When the reinforcement shaft 130 is inserted into the lower portion of the housing to be coupled, the stop jaw 131 of the reinforcement shaft 130 is caught by the lower bearing 124 to determine an assembly position of the reinforcement shaft 130. do.

The housing is provided with a fixing hole 125 (see FIG. 3) formed in the bottom surface of the fixing hole 202 formed in the through hole 56 formed in the casing lower plate 53 and the support plate 70 and the fixing bracket 201 of the drive motor. After fitting so as to communicate with each other, tighten the bolt to fix the upper surface of the casing lower plate 53 (see Fig. 2). And in this coupling process, the lower casing 53 is also fixed to the base plate 70 together.

When the housing is completely fixed to the backing plate 70, as shown in FIG. 5, the shaft reinforcement 100 may be exposed to a portion of the shaft middle portion 133 of the reinforcement shaft 130 and the shaft upper portion 134 above the housing. do.

The support ring 101 is fitted to the exposed reinforcement shaft 130. That is, the support ring 101 is interposed between the lower surface of the boss 85 of the driving wheel and the upper surface of the housing, and the support ring protrusion 106 is positioned on the upper bearing inner ring, which is a rotation wheel, so that the rotation of the driving wheel 80 can be smoothly performed. Is done.

In other words, in the case where the lower surface of the boss 85 and the upper portion of the housing directly contact each other, since the rotation of the driving wheel 80 becomes difficult due to frictional interference, the support ring 101 is installed to prevent this.

Since the upper portion of the bearing ring 101 protrudes from the upper shaft 134, it is inserted into the wheel shaft hole 86 formed in the boss 85 of the driving wheel 80. At this time, the boss 85 and the shaft upper portion 134 respectively form a boss key groove 85-1 and the shaft upper key groove 134-1, and are coupled to each other using a key.

The washer 102 is placed on the upper surface of the boss 85 of the driving wheel 80 coupled as described above, and is screwed into the female screw formed in the upper hole 136 through the washer hole 103 with the bolt 104. As a result, the driving wheel 80 is firmly coupled to the shaft reinforcement 100.

In FIG. 5, the bolt 104 is illustrated as a hexagon wrench bolt having a wrench groove 105 formed at the head, but other types of bolts and fastening means may be used.

Next, with reference to Figure 6, the operation of the ball launcher according to the present invention will be described.

When the ball B is placed on the guide bar 10, the ball B enters between the pair of driving wheels 80-1 and 80-2 along the inclination of the guide 10.

At this time, if the left driving wheel 80-1 shown in FIG. 6 rotates clockwise, and the right driving wheel 80-2 rotates counterclockwise at the same speed, between the surface of the ball and the shell of the drive wheel. The ball B is sucked between both drive wheels by the friction force and then fired forward with a force F forward.

However, since the distance between the two driving wheels is smaller than the diameter of the ball, when the ball passes, the left driving wheel 80-1 and the right driving wheel 80-1 receive the pushing force of V1 and V2 in the left and right directions, respectively. .

Therefore, when the motor shaft is directly coupled to the drive wheel without using the shaft reinforcement 100 of the present invention, the motor shaft inserted with the pushing force of the V1 and V2 into the center of the drive wheel is received as it is, so that the Deformation easily occurs.

In order to prevent such damage or deformation of the motor shaft, the diameter of the motor shaft should be increased to increase strength, but in this case, the size of the driving motor is also large.

Therefore, in the present invention, the diameter of the motor shaft is left as it is, and using the shaft reinforcement body 100 as shown in FIG. 5, the pushing force of V1 or V2 acting on the driving wheel is not the motor shaft 204 but the shaft reinforcement body. To be delivered to the reinforcement shaft (130).

The pushing force V1 or V2 thus transmitted to the reinforcement shaft 130 is eventually transmitted to the entire shaft reinforcement 100 including the housing.

However, since the shaft reinforcement 100 is fixed to the support plate 70 by bolts using the fixing hole 125 of the bottom of the housing, the pushing force V1 or V2 transmitted to the reinforcement shaft 130 is mostly supported by the support plate ( 70) and hardly affect the motor shaft 204.

On the other hand, by separately controlling the drive motor provided on both left and right, as shown in Figure 6, the rotational speed of the left drive wheel 80 is increased to generate a rotational force of T1, the right drive wheel (80) If the rotational speed of -2) is slowed to generate the rotational force of T2, the ball B generates the rotational force T to rotate toward the right driving wheel 80-2, so that after the launch, it can take the spin and fly to the curved trajectory. have.

At this time, when the rotational force T1 of the left driving wheel 80-1 is too large and the rotational force T applied to the ball B becomes larger than the right side driving wheel 80-2, the rotational force T2, the right driving wheel 80- that should be turned counterclockwise. 2) Clockwise rotational force T3 may rather occur.

In this case, a phenomenon in which the ball B may not be fired forward may occur, and a motor may have a reverse load due to a reverse load on the motor of the right driving wheel 80-2.

The present invention solves this problem by coupling the one-way clutch bearing 140 to the bush 160 of the motor shaft 204 as shown in FIG.

In the present invention, even if the clockwise rotational force T3 occurs to the right driving wheel 80-2 to be turned counterclockwise as in the case described above, the driving wheel 80-2 is in the opposite direction (the clockwise action of the one-way clutch bearing). Direction) to stop in place without rotation. And the ball (B) is pushed forward with only the force of the rotational force T1 of the left drive wheel 80 is made to shoot.

As described above, the present invention is characterized in that the ball B is always fired regardless of the size difference between the rotational force T1 of the left driving wheel 80-1 and the rotational force T2 of the right driving wheel 80-2.

Meanwhile, the ball B enters between the left and right driving wheels 80-1 and 80-2 while descending along the inclined guide bar 10.

However, when the ball does not enter the concave surface (see Fig. 2) position formed on the outer surface of the left and right driving wheels 80-1 and 80-2 correctly, the ball may not be properly caught between the wheels and may jump upward.

Since this ball is extremely dangerous if it is hit by a person around it, the present invention is provided between the top plates 51 of a pair of casings 50 respectively surrounding a pair of drive wheels 80 as shown in Figs. The upper protective plate 60 is installed on the top of the configuration to prevent the ball bouncing upwards.

In addition, by installing the upper protective plate 60, it is possible to minimize the damage to the device by foreign matter coming in from the outside between the pair of drive wheels.

The embodiments of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention, and the protection scope of the present invention should be grasped only by the matters set forth in the claims. Since those skilled in the art to which the present invention pertains can change and change the technical idea of the present invention in various forms, such improvements and modifications are obvious to those skilled in the art. If it will fall within the protection scope of the present invention.

10: guide bar 20: control panel
30: battery 40: wheels
50: casing
51: top plate 52: side plate
53: lower plate 54: fastening hole
55: bracket engaging hole 56: through hole
57: engagement piece
60: upper shield
61: top face 62: side face
63: engaging surface 64: fastening hole
70: support plate
80: drive wheel
81: jacket 82: rim
83: arm 84: central protrusion
85: Boss 85-1: Boss Keyway
86: wheel shaft hole
100: axial reinforcement
101: support ring 102: washer
103: washer hole 104: bolt
105: wrench groove 106: bearing ring protrusion
110: lower housing
111: upper housing 114: upper bearing
116: upper bearing locking jaw
124: lower bearing 125: fixing hole
126: lower bearing stopper
130: reinforcement shaft
131: stop jaw 132: lower axis
133: middle portion of the shaft 134: upper portion of the shaft
134-1: Upper shaft keyway 135: Connecting space
136: shaft top hole
140: one-way clutch bearing 150: inner space
160: bush 160-1: bush keyway
200: motor 201: fixing bracket
202: fixing hole 203: alignment projection
204: motor shaft 204-1: motor shaft keyway
B: ball

Claims (7)

In the ball launcher to enter the ball through a pair of drive wheels that rotate by the drive motor to shoot forward,
The lower portion surrounds and engages the outside of the motor shaft 204 to rotate together with the motor shaft 204 of the drive motor 200, and the upper portion of the wheel shaft hole 86 rotates together with the driving wheel 80. It is provided with a shaft reinforcement 100 including a reinforcement shaft 130 coupled to,
Ball launcher characterized in that the one-way clutch bearing 140 is interposed between the coupling motor shaft (204) and the reinforcement shaft (130). The method of claim 1,
The shaft reinforcement body 100,
Ball launcher characterized in that it comprises a housing surrounding and coupled to the outside of the reinforcement shaft 130 and a bearing interposed between the reinforcement shaft (130) and the housing. delete The method according to claim 1 or 2,
The shaft reinforcement (100) is connected to and fixed to the support plate 70, the ball launcher characterized in that the external force acting on the shaft reinforcement (100) is configured to be distributed to the support plate (70). The method according to claim 1 or 2,
The reinforcement shaft 130 coupled to the wheel shaft hole 86,
And the diameter of the shaft upper portion (134) to be larger than the diameter of the motor shaft (204) to have a stronger strength than the motor shaft (204). The method of claim 1,
On the upper surface of the drive motor 200,
The motor shaft 204 penetrates and forms a fixing bracket 201 in which a fitting protrusion 203 protrudes from the motor shaft 204 at a predetermined distance.
A bracket coupling hole 55 is formed in the support plate 70 on which the driving motor 200 is installed downward, and when the driving motor 200 is coupled, the outer side of the fitting protrusion 203 of the fixing bracket 201 is fixed. Ball launcher characterized in that it is configured to contact the inner peripheral surface of the bracket engaging hole (55). delete

Images