KR102536493B1 - Automatic ball pitching apparatus for exercise - Google Patents

Abstract

The present invention relates to an apparatus for automatically supplying exercise balls. The apparatus comprises: a yawing motion implementation unit supported on a horizontal support surface and capable of rotating in both directions about a drive shaft perpendicular to the support surface; a pitching motion implementation unit which rotates in both directions about a horizontal drive shaft while installed in the yawing motion implementation unit; a ball launching unit which is mounted on the pitching motion implementation unit and applies kinetic energy to a ball provided from the outside to launch the ball forward; a launch guider which is installed in front of the ball launching unit and allows a ball launched by the ball launching unit to pass therethrough to give the ball straightness; a feeding means which continuously provides balls to the ball launching unit; and a controller which controls the yawing motion implementation unit and the pitching motion implementation unit to determine a launch direction and launch angle of a ball. Accordingly, the apparatus for automatically supplying exercise balls, according to the present invention, can freely implement yawing or pitching motion using a motor so that the direction or angle of a launched ball can be quickly and accurately changed, an effect of training players can be doubled, and reflexes can also be improved.

Description

Automatic ball pitching apparatus for exercise}

The present invention relates to an automatic exercise ball supply device that continuously fires a ball to a user, and more particularly, to an exercise ball that can improve practice efficiency by accurately adjusting the up, down, left, and right directions of a ball to be thrown. It relates to an automatic ball supply device.

As club activities such as baseball, soccer, badminton, bowling, and tennis are activated, sports-related articles and equipment are also continuously developed. Sports goods or equipment not only prevent injury during the game but also function to help maintain the best game condition, and among them, in the case of training, improve the skills of players by helping individual or team training.

On the other hand, among various sports, in the case of baseball or tennis, it is important to accurately hit the ball with a bat or racket. For this purpose, an automatic ball supply device that continuously and automatically throws the ball is used.

There are various types of automatic ball supply devices, among which there is an automatic tennis ball launcher disclosed in Korean Patent Publication No. 10-2018-0031135.

The disclosed automatic firing device includes a bottom frame supported on the floor; A front frame with a pair of upright installations installed in front of the bottom frame, a lower piece protruding forward at the bottom, and an upper piece protruding rearward at the top. Upper and lower wheel drive motors installed on the bottom frame, lower wheels rotatably coupled to the rotational shaft coupled to the lower side, receiving driving force of the lower wheel drive motor by belts and pulleys, and having lower rotation rollers coupled to the outer circumference; a firing means composed of an upper wheel rotatably coupled to a rotating shaft coupled to a side, receiving a driving force of an upper wheel driving motor by a belt and a pulley, and having an upper rotating roller coupled to an outer circumference; A pair of support frames connected to a bottom frame and a pair of front frames, formed to be inclined upward toward the front, and having a support member connected thereto; It is supported by a support member and is installed on the upper side of the support frame, and after the tennis ball is supplied, it goes forward and is put into the nip between the upper and lower wheels to guide means for firing and is installed on the bottom frame or support frame and powers on It consists of a controller that receives the supply and controls the operation of the upper and lower wheel drive motors.

However, the conventional tennis ball launcher described above has a limitation that the launching direction or angle of the tennis ball is fixed. That is to say, you can only send a tennis ball in one direction, and only along an almost defined trajectory. Players who practice know in advance which direction the next ball will fly, so the effect of practice is inevitably less.

The present invention was created to solve the above problems, and since yawing or pitching motions are freely implemented, it provides an automatic exercise ball supply device that can quickly and accurately change the direction or angle of a ball to be launched. There is a purpose.

An automatic exercise ball feeding device of the present invention as a means of solving the problems for achieving the above object is supported on a horizontal support surface and includes a yawing motion implementation unit capable of rotating in both directions around a drive shaft perpendicular to the support surface; a pitching motion implementation unit that rotates in both directions around a horizontal driving shaft while being installed in the yawing motion implementation unit; a ball launching unit mounted on the pitching motion implementing unit and applying kinetic energy to the ball provided from the outside to launch the ball forward; a launching guider installed in front of the ball launching unit, passing the ball launched by the ball launching unit and imparting straightness to the ball; a feeding means for continuously supplying balls to the ball launching unit; It includes a controller that controls the yawing motion implementation unit and the pitching motion implementation unit to determine the launch direction and launch angle of the ball.

In addition, a support cabinet providing the support surface and accommodating a controller is further provided, and the yawing motion implementation unit; A yawing motor fixed to the supporting surface and outputting a rotational force through the driving shaft, and a yawing structure fixed to the driving shaft, rotating left and right on the supporting surface and providing support force, and a pitching motion implementing unit; A pitching motor mounted on one side of the yawing structure and outputting rotational force through a horizontal drive shaft, a pitching frame that rotates up and down by the pitching motor while being supported by the yawing structure, and a pitching frame fixed to the pitching frame and supporting the ball launching unit. A support plate is provided.

Further, the support plate is a plate-like member that performs yawing and pitching movements by a controller in a state fixed to the pitching frame, and the ball launching unit; An upper motor and a lower motor fixed vertically to the support plate, and an upper and lower acceleration wheels connected to the upper and lower motors, rotating in opposite directions, and accelerating while passing the ball supplied by the feeding means, , the feeding means; A feeding duct that receives balls supplied from the outside and descends one by one, and a straight line installed at the bottom of the feeding duct, extending between the upper and lower acceleration wheels, and guiding the balls between the upper and lower acceleration wheels. A support band providing a running groove, a guide block fixed to the top of the support band, a pushing arm installed in the guide block to enable linear motion and pushing the ball descended from the feeding duct toward the straight running groove, and the controller It is controlled by and has a pushing arm drive unit that reciprocates the pushing arm.

In addition, the launch guider; A guide barrel having a certain inner diameter and extending in the longitudinal direction and fixed to the pitching frame, a barrel casing having a space portion surrounding the guide barrel and communicating with the inner space of the guide barrel through a plurality of flap seating passages, and a rotation support pin A plurality of friction flaps installed in each flap seating passage and rotatable by using the rotation support pin as a rotation shaft, and protruding the friction flaps to the inside of the guide barrel while installed in the space of the barrel casing, The passing ball rotates while rubbing against the friction flap, and is connected to an actuator disposed corresponding to each friction flap, a spring connecting the actuator and the friction flap, an angle controller controlling the rotation angle of the friction flap through the actuator, and the controller. It has a communication module that transmits the control signal of the controller to the angle controller.

Since the automatic exercise ball feeding device of the present invention made as described above realizes yawing or pitching motion using a motor freely, it is possible to quickly and accurately change the direction or angle of the ball to be launched, thereby training the player. It doubles the effect and improves reflexes.

1 is a partially cut away perspective view of an automatic exercise ball feeding device according to an embodiment of the present invention.
FIG. 2 is a perspective view showing the automatic exercise ball feeder shown in FIG. 1 viewed from another angle.
Figure 3 is a schematic front view of the automatic ball feeder of Figure 1;
FIG. 4 is a view showing the support band shown in FIG. 2 separately.
5 and 6 are views showing a yawing operation of the automatic ball supply device shown in FIG. 1 .
7 is a side view illustrating a pitching operation of the automatic ball supply device of FIG. 1;
8 is a cutaway perspective view of a launch guide applicable to an automatic ball supply device according to an embodiment of the present invention.
9 is a diagram for explaining the internal configuration and operation of the launch guider shown in FIG. 8;

Hereinafter, one embodiment according to the present invention will be described in more detail with reference to the accompanying drawings.

1 is a partially cut away perspective view of an automatic exercise ball feeder 10 according to an embodiment of the present invention, and FIG. 2 is a perspective view showing the automatic exercise ball feeder shown in FIG. 1 viewed from another angle. am. In addition, Figure 3 is a schematic front view of the automatic ball supply device of Figure 1, Figure 4 is a view showing the support band shown in Figure 2 separately.

As shown, the automatic exercise ball supply device 10 according to the present embodiment includes a support cabinet 11, a controller 13, a yawing motion implementation unit 15, a pitching motion implementation unit 19, and a ball launching It includes a part, a launch guider 29, and a feeding means.

The supporting cabinet 11 is an enclosure having an openable door 11a on the front side, and provides a horizontal supporting surface 11b. A controller 13 and a yaw motor 15b are built into the support cabinet 11.

The yaw motion implementation unit 15 is supported on the receiving surface 11b and rotates in both directions using the drive shaft 15c perpendicular to the receiving surface as a rotation center. The drive shaft 15c is an output shaft of the yawing motor 15b. Rotation around the vertical drive shaft 15c is a yawing motion, which rotates the launch guider 29 in the left and right directions. Through the yaw motion realization unit 15, it is possible to adjust the launch angle of the launched ball in the left and right directions.

The yawing motion implementation unit 15 includes a yawing motor 15b and a yawing structure 15a. The yaw motor 15b is controlled by the controller 13 and rotates the vertical drive shaft 15c in both directions. In addition, the yawing structure 15a is formed by bending a band-shaped member having a certain width and thickness, and takes a U-shaped shape open to the top. The driving shaft 15c is coupled to the center of the lower surface of the yawing structure 15a.

The pitching motion implementation unit 19, in a state installed in the yawing structure 15a of the yawing motion implementation unit, rotates in both directions around a horizontal drive shaft (19c in FIG. 3) by a pitching motor 19b.

The pitching motion implementation unit 19 includes a pitching motor 19b, a pitching frame 19a, and a support plate 21. The pitching motor 19b is mounted on one side of the yawing structure 15a and outputs rotational force through a horizontal drive shaft 19c. The operation of the pitching motor 19b is performed by the controller 13.

As shown in FIG. 5, the pitching frame 19a has a substantially square planar shape and has a driving disk 19d and a support disk 19g on both sides. The transmission disk 19d and the support disk 19g are disk-shaped members and are fixed to the pitching frame 19a by welding.

The electric disk 19d is connected to the drive shaft 19c of the pitching motor 19b. The rotational torque of the pitching motor 19b is transmitted to the pitching frame 19a through the electric disk 19d. In addition, the support disk 19g is supported by the yawing structure 15a via the bearing shaft 19h. As a result, the pitching frame 19a is supported by the yawing structure 15a through the driving shaft 19c and the bearing shaft 19h, and receives the rotational force of the pitching motor 19b to perform pitching movement up and down.

The support plate 21 is a rectangular plate having a certain thickness, and is a plate-like member having both ends in the width direction welded and fixed to the pitching frame 19a in a vertically erected state. The support plate 21 and the pitching frame 19a form one body. In addition, the support plate 21 is provided with a through passage 21b. The through passage 21b is a square hole, and passes parts of the upper acceleration wheel 23a and the lower acceleration wheel 23b. The support plate 21 is capable of yawing and pitching movements by a controller.

The ball launching unit is mounted on the support plate 21 of the pitching motion implementation unit, passes the ball provided from the feeding means, and applies kinetic energy to launch the ball forward.

The empty launching unit includes an upper motor 24a, a lower motor 24b, an upper acceleration wheel 23a, and a lower acceleration wheel 23b. The upper motor (24a) and the lower motor (24b) are arranged up and down on the rear surface of the support plate 21, and are operated by the controller (13). The rotation speed of the upper motor 24a and the lower motor 24b is controlled by the controller 13 . In addition, rotational directions of the drive shaft of the upper motor 24a and the drive shaft of the lower motor are opposite.

The upper accelerating wheel 23a is a disk-shaped member fixed to the drive shaft of the upper motor 24a. A part of the upper acceleration wheel 23a protrudes forward through the through passage 21b. Also, the lower accelerating wheel 23b is fixed to the drive shaft of the lower motor 24b. The lower acceleration wheel 23b has the same size and shape as the upper acceleration wheel 23a, and rotates in the opposite direction. The lower acceleration wheel 23b is positioned below the upper acceleration wheel 23a in the vertical direction.

In addition, the lower acceleration wheel 23b and the upper acceleration wheel 23a are spaced apart so that the ball B can pass therebetween. The ball B passes between the lower acceleration wheel 23b and the upper acceleration wheel 23a, is accelerated, and then is launched forward through the launch guider 29.

The launching guider 29 is installed in front of the ball launching part, that is, in front of the space between the upper and lower acceleration wheels 23a and 23b, passes the accelerated ball and gives the ball straightness. The ball launched from the upper and lower acceleration wheels 23a and 23b has a straight-line tendency while passing through the launch guider. The launch guider, so to speak, serves as the barrel of the rifle.

A through hole 19f is formed in the pitching frame 19a to install the launch guider 29. The through hole 19f is a hole through which the ball enters the launch guider. The launch guider 29 is composed of a plurality of parallel guide bars 29a and two fixing rings 29b. The guide bar 29a is a circular rod-shaped member extending straight in the longitudinal direction, and both ends are fixed to the fixing ring 29b in a spaced apart state in parallel with each other.

The fixing ring 29b maintains the distance between the guide bars, and the one-side fixing ring 29b is fixed to the pitching frame 19a while including the through hole 19f in its inner region. The other fixing ring 29b is located at the extended end of the guide bar 29a.

Since the launch guider 29 is composed of the guide bar 29a and the fixing ring 29b, it is light in weight, so that the pitching frame 19a has a small load and hardly generates vibration during yawing or pitching motion.

Meanwhile, the feeding means serves to continuously supply balls between the upper acceleration wheel 23a and the lower acceleration wheel 23b. The feeding means includes a feeding duct 25, a support band 27a, a guide block 27c, a pushing arm 27d, and a pushing arm driver.

The feeding duct 25 is a vertical pipe that receives balls supplied from the outside and lowers them one by one, and has a pushing arm gate 25a at the lower end. The pushing arm gate 25a is a passage through which the pushing arm 27d enters and exits. The balls B supplied from the outside pass through the feeding duct 25 and descend one by one, finally reach the front of the pushing arm 27d, and are pushed by the pushing arm 27d to move toward the upper and lower accelerator wheels. .

The support band 27a is installed below the feeding duct 25, extends between the upper and lower acceleration wheels, and has a straight running groove 27b at the extended end. The support band 27a is fixed to the pitching frame 19a by welding.

As shown in FIG. 4, the support band 27a is a strip-shaped member having a predetermined width and extending straight, and has a straight running groove 27b at an extended end. The straight running groove 27b imparts straightness to the ball, and guides the ball to accurately enter between the upper and lower accelerator wheels. The width W of the straight running groove 27b is naturally smaller than the diameter of the ball. The width (W) may be 1/3 to 1/2 of the ball diameter. The ball pushed by the pushing arm 27d moving in the direction of arrow d enters the straight driving groove 27b, enters between the upper and lower acceleration wheels, and then protrudes forward.

The guide block 27c is a guide member mounted on the upper surface of the support band 27a and guides the reciprocating motion of the pushing arm 27d. The pushing arm 27d is a straight member extending in the longitudinal direction, and both ends extend in opposite directions while being supported by the guide block 27c. It is preferable that the central axis of the pushing arm 27d coincides with the central point of the ball B.

The pushing arm driver reciprocates the pushing arm 27d in the longitudinal direction, and includes a first link bar 27e, a second link bar 27f, and a pushing motor 27g. The first link bar 27e is pin-connected to the rear end of the pushing arm 27d, and the second link bar 27f is pin-connected to the rear end of the first link bar 27e. Also, the second link bar 27f is linked to the motor shaft 27h of the pushing motor 27g. Therefore, when the pushing motor 27g is driven, the second link bar 27f continuously rotates in one direction, and the pushing arm 27d reciprocates due to the action of the first and second link bars.

5 and 6 are plan views showing a yawing operation of the automatic ball supply device shown in FIG. 1 .

Referring to FIG. 5, the launch guider 29 is facing forward. The ball is thrown forward of the automatic feeder 10. (The launch angle is out of the question.) In this state, in order to switch the launch guider 29 in the direction of the arrow f, for example, the yaw motion implementation unit 15 Make it work. That is, by driving the yaw motor 15b through the controller 13 to change the direction of the firing guide 29, the state of FIG. 6 can be obtained. The opposite rotation is the same.

In the state of FIG. 6 , the launch guider 29 may be rotated in the direction of the arrow h by operating the yaw motion implementation unit 15 again.

7 is a side view illustrating a pitching operation of the automatic ball supply device of FIG. 1;

Referring to FIG. 7 , it can be seen that the launch guider 29 is inclined upward. This operation is performed by the pitching motion implementing unit 19 described above. That is, the pitching motor 19b is operated through the controller 13 to adjust the launch angle of the ball. It goes without saying that the flight distance can be adjusted by adjusting the launch angle of the ball.

8 is a cutaway perspective view of another type of launch guider 30 applicable to the automatic ball supply device according to an embodiment of the present invention, and FIG. 9 is for explaining the internal configuration and operation of the launch guider shown in FIG. it is a drawing

The launch guider 30 shown in FIG. 8 rotates a ball to be launched to create a spin ball. If the ball (B) rotates strongly, the trajectory of the ball is bent and the effect of the exercise can be doubled.

The launch guider 30 includes a guide barrel 31, a barrel casing 33, a plurality of friction flaps 35, and a friction flap driver.

The guide barrel 31 is a hollow cylindrical member having a certain inner diameter, extending in the longitudinal direction, and fixed to the pitching frame. Of course, the through hole 19f is included in the inner region of the guide barrel 31. In addition, the inner diameter of the guide barrel 31 is naturally larger than the diameter of the ball (B). Also, the length of the guide barrel 31 may vary.

The barrel casing 33 has a space portion 33a as a ring-shaped housing surrounding a part of the outer circumferential surface of the guide barrel 31 . The space portion 33a communicates with the inside of the guide barrel through four flap seating passages 31a.

The flap seating passage 31a is a square hole at regular intervals along the circumferential direction of the guide barrel 31 and accommodates the friction flap 35. The friction flap 35 is a rectangular plate of the guide barrel 31, and one end is installed in the flap seating passage 31a via the rotation support pin 35a. The friction flap 35 is rotatable around the rotation support pin 35a in the direction of the arrow m or in the opposite direction. Reference numeral 33b denotes a support jaw. The support jaw 33b prevents the friction flap 35 from sinking into the space 33a.

The friction flap driving unit deploys the selected friction flap 35 in the direction of the arrow m, so that the ball B passing through the inside of the guide barrel is rubbed against the friction flap and rotates in the direction of the arrow S. That is, spin the ball. Which of the four friction flaps 35 to deploy is determined by the controller 13.

The friction flap driving unit includes an actuator 36a, a spring 37, an angle controller 38, and a communication module 39. The actuator 36a is an electronic actuator and linearly moves the spring holder 36b. The stroke of the actuator 36a is controlled by the angle controller 38. That is, the angle controller 38 controls the maximum rotation angle of the friction flap through the actuator.

The spring 37 is a compression coil spring, and both ends are fixed to the spring holders 35b and 36b. The spring holder 35b is a member fixed to the friction flap 35 and is coupled to one end of the spring 37. In addition, another spring holder 36b is mounted on the actuator 36a and is engaged with the other end of the spring.

The reason why the spring 37 is applied is that the ball B launched in the direction of the arrow P can push the friction flap 35 exposed to the inside of the guide barrel 31, that is, the unfolded friction flap 35 to get out. it is taken into account The ball rotating in the direction of the arrow s due to friction with the friction flap 35 is bent while flying. When the four friction flaps 35 are operated at random, since the ball does not know in which direction, the exerciser's reflexes become faster and the exercise effect is doubled.

In the above, the present invention has been described in detail through specific embodiments, but the present invention is not limited to the above embodiments, and various modifications are possible by those skilled in the art within the scope of the technical idea of the present invention.

10: automatic feeder 11: support cabinet 11a: door
11b: support surface 13: controller 15: yaw motion implementation unit
15a: Yawing structure 15b: Yawing motor 15c: Drive shaft
19: pitching motion implementation unit 19a: pitching frame 19b: pitching motor
19c: drive shaft 19d: electric disk 19f: through hole
19g: support disk 19h: bearing shaft 21: support plate
21b: through passage 23a: upper acceleration wheel 23b: lower acceleration wheel
24a: upper motor 24b: lower motor 25: feeding duct
25a: Pushing arm gate 27a: Support band 27b: Straight running groove
27c: guide block 27d: pushing arm 27e: first link bar
27f: second link bar 27g: pushing motor 27h: motor shaft
29: launch guider 29a: guide bar 29b: fixed ring
30: launch guider 31: guide barrel 31a: flap seating passage
33: barrel casing 33a: space portion 33b: support jaw
35: friction flap 35a: rotation support pin 35b: spring holder
36a: actuator 36b: spring holder 37: spring
38: angle controller 39: communication module

Claims (4)

A yawing motion implementation unit supported on a horizontal supporting surface and capable of rotating in both directions around a drive shaft perpendicular to the supporting surface; a pitching motion implementation unit that rotates in both directions around a horizontal driving shaft while being installed in the yawing motion implementation unit; a ball launching unit mounted on the pitching motion implementing unit and applying kinetic energy to the ball provided from the outside to launch the ball forward; a launching guider installed in front of the ball launching unit, passing the ball launched by the ball launching unit and imparting straightness to the ball; a feeding means for continuously supplying balls to the ball launching unit; A controller that controls the yaw motion implementation unit and the pitching motion implementation unit to determine the launch direction and launch angle of the ball,
Further comprising a support cabinet providing the support surface and accommodating a controller,
The yaw motion implementation unit; A yawing motor fixed to the supporting surface and outputting a rotational force through the driving shaft, and a yawing structure fixed to the driving shaft, rotating left and right on the supporting surface and providing support force, and a pitching motion implementing unit; A pitching motor mounted on one side of the yawing structure and outputting rotational force through a horizontal drive shaft, a pitching frame that rotates up and down by the pitching motor while being supported by the yawing structure, and a pitching frame fixed to the pitching frame and supporting the ball launching unit. It is provided with a support plate,
The support plate is a plate-like member that is yawed and pitched by a controller in a state fixed to the pitching frame,
The empty launching unit; An upper motor and a lower motor fixed vertically to the support plate, and an upper and lower acceleration wheels connected to the upper and lower motors, rotating in opposite directions, and accelerating while passing the ball supplied by the feeding means, ,
The feeding means; A feeding duct that receives balls supplied from the outside and descends one by one, and a straight line installed at the bottom of the feeding duct, extending between the upper and lower acceleration wheels, and guiding the balls between the upper and lower acceleration wheels. A support band providing a running groove, a guide block fixed to the upper part of the support band, a pushing arm installed in the guide block to enable linear motion and pushing the ball descended from the feeding duct toward the straight running groove, and the controller Controlled by, and having a pushing arm drive unit for reciprocating the pushing arm,
Automatic exercise ball feeder. delete delete According to claim 1,
The launch guider;
A guide barrel having a certain inner diameter and extending in the longitudinal direction and fixed to the pitching frame;
A barrel casing having a space portion surrounding the guide barrel and communicating with the inner space of the guide barrel through a plurality of flap seating passages;
A plurality of friction flaps installed in each flap seating passage through rotation support pins and rotatable using the rotation support pins as rotational axes;
The friction flap protrudes to the inside of the guide barrel while installed in the space of the barrel casing, and the balls passing through the inside of the guide barrel rub against the friction flap and rotate. An angle controller that controls the rotational angle of the friction flap through a spring connecting the flap and an actuator, and a communication module connected to the controller and transmitting a control signal of the controller to the angle controller,
Automatic exercise ball feeder.

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