CN109011446B

CN109011446B - Intelligent javelin

Info

Publication number: CN109011446B
Application number: CN201811190136.8A
Authority: CN
Inventors: 刘炜
Original assignee: Hunan First Normal University
Current assignee: Hunan First Normal University
Priority date: 2018-10-12
Filing date: 2018-10-12
Publication date: 2020-02-21
Anticipated expiration: 2038-10-12
Also published as: CN109011446A

Abstract

The invention provides an intelligent javelin, which comprises a javelin head (1) and a javelin rod (5) detachably connected with the javelin head, wherein a sensor is arranged in the javelin head (1) and is in communication connection with a mobile terminal, the javelin head (1) is provided with a connecting bolt (11), the connecting bolt (11) of the javelin head (1) is provided with an axis, a clamping structure is fixedly connected onto the javelin rod (5) and is used for clamping or releasing the connecting bolt (11) relative to the axis, different javelin heads (1) can be selected according to different training requirements due to the fact that the sensor is arranged on the javelin head (1), and during training, only the javelin head (1) needs to be replaced.

Description

Intelligent javelin

Technical Field

The invention relates to physical education equipment, in particular to an intelligent javelin which is a standard javelin for non-competition and is suitable for daily teaching and training.

Background

In recent years, sports teaching is more and more emphasized by the nation and the society, and the javelin is taken as a track and field necessary lesson for sports major, and the teaching method for years is continuously developed and advanced along with the development of times. The traditional teaching project is combined with a new teaching method, fresh blood is injected into the traditional javelin teaching, and new vitality is added to the javelin teaching. The javelin belongs to a part of throwing items, reasonable special psychological structure-orientation is beneficial to exerting the running speed and promoting the improvement of special technology and special performance, in javelin technology throwing steps and final exertion teaching, the psychological orientation of 'big-small-big-minimum' running-up rhythm is required to be cultured, the psychological state of students is adjusted, and the action of the sports psychological orientation on mastering the sports technology and improving the special performance is researched. But the basic quality and the teaching acceptance of students are different, and obvious differences are reflected in teaching. In view of the above differences, a coach should provide a targeted training plan and scheme for training javelin athletes according to actual conditions, and guide javelin techniques of the athletes by referring to data in training and competition of the athletes, so as to improve the competitive level of the athletes, provide scientific basis for training and development of the athletes, need to take parameters of a last starting stage as a research object, perform simulation analysis on a thrown javelin, and have a certain guiding effect on further improving teaching and training of javelin movement.

At present, javelin teaching aids capable of detecting javelin tracks appear in the prior art, for example, CN104474676A discloses an intelligent javelin for training and a motion track recording system thereof, and a sensor capable of acquiring various data parameters in the javelin throwing process in real time is additionally arranged on a javelin body, so that monitoring and research on athletes can be better, and training and guidance on athletes are facilitated.

However, in practical teaching, the movement of the javelin has particularity, and various parameters are required to be monitored, so that different types of sensors are required to be used according to requirements, and the sensor mounting mode of the patent is fixed, only the sensor is mounted on the body in a public mode, and the problem of diversity of sensor mounting cannot be solved.

Further, it is known from physics that, even when a javelin is thrown, the rotation also loses the energy of the javelin and shortens the flight distance of the javelin during its flight, which also requires that the circumferential mass be uniform during the manufacturing process of the javelin, and the above patent does not take into account. In particular, the addition of smart devices, which destroy the original uniform quality of the javelin characteristics, is not an insurmountable problem in conventional javelin production, but is a technical problem in the field of smart javelin which no good solution is recognized or appreciated.

Disclosure of Invention

The purpose of the invention is: the utility model provides an intelligence is at the javelin to can reach by the quick replacement at least partial javelin accessory and satisfy the intelligent function promptly and satisfy the standardized demand of teaching, scientific guide training and match. Further can and effectual adjustment javelin quality focus, reach more excellent teaching effect.

The utility model provides an intelligence javelin, includes javelin head and can dismantle the javelin pole of being connected with it, includes sensor and mobile terminal communication connection in the javelin head, and the javelin head has the connection bolt, and the javelin head connection bolt has the axis, fixedly connected with clamping structure on the javelin pole, and clamping structure is used for pressing from both sides tightly or release the connection bolt for the axis. The communication connection of the sensor and the mobile terminal is the prior art, and the sensor can be used including, but not limited to, a displacement sensor, a gravity sensor, an acceleration sensor, and the like. The communication connection between the sensor and the mobile terminal is also common knowledge in the communication field, which is not the focus of the present invention and is not described herein.

The clamping structure comprises a C-shaped shell, a cover body and a shell formed by end covers, wherein a positioning sleeve and a C-shaped supporting sleeve are abutted against and jointly installed in the shell, the sliding sleeve is slidably positioned in the positioning sleeve, the outer wall of the sliding sleeve is contacted with the inner wall of the positioning sleeve, one end of a first spring is abutted against the outer wall of the bottom of the sliding sleeve, the other end of the first spring is abutted against the inner turned edge of the C-shaped supporting sleeve, a limiting cover is sealed in the C-shaped shell by the cover body, a supporting core block is arranged in the bottom of the sliding sleeve and sleeved with a second spring, one end of the second spring is abutted against the inner wall of the bottom of the sliding sleeve, the other end of the second spring is directly or indirectly abutted against the plane end of an umbrella-shaped block, a plurality of wedge-shaped blocks are positioned in a limiting space formed by the limiting cover, the sliding sleeve and the umbrella-shaped block, the plurality of, a central rod is fixedly arranged at the bottom of the sliding sleeve, the central rod can axially slide in the guide cylinder of the end cover, the central rod is detachably and fixedly connected with a balance weight through a connecting side connecting rod, the balance weight is positioned in a through groove of the C-shaped shell,

under the clamping state of the clamping structure, the connecting bolt of the javelin head passes through the central holes of the cover body and the limiting cover, the wedge-shaped block is supported and clamped by the inclined guide surface of the limiting cover, the inner wall of the sliding sleeve and the conical surface of the umbrella-shaped block together, the wedge-shaped blocks gather to clamp the connecting bolt towards the center,

under the release state of the clamping structure, the balance weight is pulled by external force through the central rod and the side connecting rod to pull the sliding sleeve, the sliding sleeve compresses the first spring, the first convex part of the wedge block enters a space between the sliding sleeve and the inclined guide surface, the second convex part of the wedge block enters the groove on the inner wall of the sliding sleeve, the wedge block slides along the inclined guide surface and the conical surface of the umbrella-shaped block in the direction far away from the connecting bolt, the connecting bolt is released, the second spring gradually extends to push the umbrella-shaped block in the direction of the wedge block, after the javelin head is separated from the javelin rod, external force is withdrawn from the balance weight, the sliding sleeve moves towards the wedge block under the action of the first spring, and the clamping structure is restored to the clamping state.

The sensor in the javelin head is installed close to the connecting bolt, the counter weight is used for balancing the mass gravity center of the javelin head and the javelin rod in a clamping state, and the mass gravity center of the javelin head, the javelin rod and the counter weight is coincided with the physical axis of the javelin head and the javelin rod.

A method for balancing mass center of gravity of intelligent javelin uses the intelligent javelin,

s1, selecting a standard gun head;

s2, installing a sensor in the javelin head;

s3, tightly connecting a connecting bolt of the javelin head with a clamping structure on the javelin rod;

s4, rotating the target gun head along the physical axes of the target gun head and the target gun rod to enable the mass center of gravity, the physical axes and the through groove of the C-shaped shell of the target gun head and the target gun rod to be coplanar in space;

s5, selecting a balance weight to be installed in the through groove and connected with the side connecting rod, so that the mass center of gravity of the javelin head, the javelin rod and the balance weight is superposed with the physical axis of the javelin head and the javelin rod.

Has the advantages that:

1) the invention provides an intelligent javelin, which adopts a javelin body formed by quick detachable connection, a sensor is arranged on a javelin head, the sensor is connected with a mobile terminal to form an intelligent function, different javelin heads can be selected according to different training requirements, and only the javelin head needs to be quickly replaced during training. Because the javelin head is connected with the fixed type sensor and forms fixed function, do not need too much consideration when producing the javelin head the fixed wildcard nature of sensor, this is favorable to the fixed of javelin head and sensor more. In the aspect of quick detachable connection, the wedge-shaped blocks which are evenly distributed in the circumferential direction are used for clamping the connecting bolt of the javelin head instead of being connected by threads or buckles, so that the replacing speed of the javelin head is greatly improved. The use method of one javelin rod matching with a plurality of javelin heads becomes possible.

2) The intelligent javelin provided by the invention firstly provides the technical problem that the mass center of gravity of the intelligent javelin needs to be considered, and the technical problem is creative. The invention relates to an intelligent javelin, which aims to solve the technical problem that mass gravity center random offset is further generated by matching a javelin rod with a plurality of javelin heads.

3) The invention also provides a specific use method of the counterweight when the intelligent javelin is used, namely a gravity error accumulation method, wherein a javelin head is selected according to actual requirements, wherein the actual requirements refer to requirements of a field, safety requirements, meteorological requirements and the like, then a sensor selected according to the actual requirements is installed on the javelin head, and then the javelin head is assembled with a javelin rod, and the problem of gravity center deviation does not need to be considered in the series of assembling processes. Then the javelin head is rotated relative to the javelin rod, the current mass center of gravity is formed on the opposite side of the through groove of the C-shaped shell, and the mass center of gravity is adjusted to the axis at one time by the counterweight. It should be noted that, because the javelin head and the javelin rod are not connected by screw threads, the rotating center of gravity adjusting method can be realized, because if the screw threads are connected, the screw threads are fixed, the screw threads need to rotate to a specified position to meet the fixing requirement, and the screw threads can not be adjusted by rotation between the screw threads and the javelin rod, so that the rotating center of gravity can be adjusted by clamping and fixing.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional structural view of a clamping structure according to an embodiment of the present invention;

in the figure: the javelin head comprises a javelin head 1, a connecting bolt 11, a C-shaped shell 21, a cover body 22, a limiting cover 3, a bevel guide surface 31, a positioning sleeve 4, a javelin rod 5, a connecting hole 51, a sliding sleeve 61, a sliding sleeve bottom 611, a first spring 62, an umbrella-shaped block 63, a supporting core block 64, a second spring 65, a wedge-shaped block 66, a first convex part 661, a second convex part 662, a counterweight 7, a central rod 81, a side connecting rod 82, a C-shaped supporting sleeve 9, a barrel frame 91, an inner flanging 92, an end cover 10, a connecting head 101, a guide barrel 102 and an annular wall 103.

Detailed Description

With reference to fig. 1-2, the intelligent javelin of the present invention comprises a javelin head 1 and a javelin rod 5 detachably connected thereto, wherein the javelin head 1 includes a sensor in communication connection with a mobile terminal, the javelin head 1 has a connection bolt 11, the connection bolt 11 of the javelin head 1 has an axis, and the javelin rod 5 is fixedly connected with a clamping structure for clamping or releasing the connection bolt 11 relative to the axis.

The clamping structure comprises a shell formed by the C-shaped shell 21, the cover body 22 and the end cover 10 together, the positioning sleeve 4 and the C-shaped supporting sleeve 9 are abutted against and installed together in the shell, the sliding sleeve 61 is positioned in the positioning sleeve 4 in a sliding way, the outer wall of the sliding sleeve 61 is contacted with the inner wall of the positioning sleeve 4, in particular, a first convex part 661 and a second convex part 662 of the outer wall of the sliding sleeve 61 are contacted with the inner wall of the positioning sleeve 4, one end of a first spring 62 is abutted against the outer wall of the bottom 611 of the sliding sleeve, the other end of the first spring is abutted against an inner flanging 92 of the C-shaped supporting sleeve 9, the limiting cover 3 is covered in the C-shaped shell 21 by the cover body 22, a supporting core block 64 is arranged in the bottom 611 of the sliding sleeve, a second spring 65 is sleeved on the supporting core block 64, one end of the second spring 65 is abutted against the inner wall of the bottom 611 of the sliding sleeve, in the limiting space formed by the umbrella-shaped block 63, the connecting bolt 11 can be clamped or released by the plurality of wedge-shaped blocks 66, the inclined guide surface 31 of the limiting cover 3 and the conical surface of the umbrella-shaped block 63 respectively guide the top surface and the bottom surface of the wedge-shaped block 66, a central rod 81 is fixedly arranged at the bottom 611 of the sliding sleeve, the central rod 81 can axially slide in the guide cylinder 102 of the end cover 10, the central rod 81 is detachably and fixedly connected with the counterweight 7 through a connecting side connecting rod 82, and the counterweight 7 is positioned in a through groove of the C-shaped shell 21.

In the clamping state of the clamping structure, the connecting bolt 11 of the javelin head 1 passes through the central holes of the cover body 22 and the limiting cover 3, the wedge-shaped block 66 is abutted and clamped by the inclined guide surface 31 of the limiting cover 3, the inner wall of the sliding sleeve 61 and the conical surface of the umbrella-shaped block 63, and the wedge-shaped blocks 66 are gathered towards the center to clamp the connecting bolt 11.

In the releasing state of the clamping structure, the counterweight 7 is subjected to external force to pull the sliding sleeve 61 through the central rod 81 and the side connecting rod 82, the sliding sleeve 61 compresses the first spring 62, the first convex part 661 of the wedge block 66 enters the space between the sliding sleeve 61 and the inclined guide surface 31, the second convex part 662 of the wedge block 66 enters the groove on the inner wall of the sliding sleeve 61, the wedge block 66 slides along the inclined guide surface 31 and the conical surface of the umbrella-shaped block 63 in the direction away from the connecting bolt 11, the connecting bolt 11 is released, the second spring 65 gradually extends to push the umbrella-shaped block 63 in the direction of the wedge block 66, after the javelin head 1 is separated from the javelin rod 5, the external force is removed from the counterweight 7, the sliding sleeve 61 moves towards the wedge block 66 under the action of the first spring 62, and the clamping structure is restored to the clamping state.

The C-shaped support 9 also has a through slot, the mounting of which needs to be adapted to the C-shaped housing 21, obviously the cartridge holder 91 needs to be relieved of the side link 82. The function of the inner flange 92 is to abut against the first spring.

The attachment hole 51 of the javelin rod 5 is used to attach the attachment head 101 of the end cap 10, preferably a threaded connection.

The end cap 10 further comprises a guide cylinder 102 and a circular wall 103, the guide cylinder 102 and the connecting head 101 are located on two sides of the end cap 10, and the circular wall 103 is used for being arranged corresponding to the barrel frame 91.

Preferably, in order to reduce the friction between the sliding sleeve 61 and the positioning sleeve 4, a groove is formed on the outer wall of the sliding sleeve 61 in a material removing manner, and the end parts of the sliding sleeve 61 on two sides of the groove and the positioning sleeve 4 form a sliding friction pair.

Preferably, the limit cover 3 is in threaded connection with the positioning sleeve 4.

The sensor in the javelin head 1 is installed next to the connecting bolt 11, the counterweight 7 is used for balancing the mass gravity center of the javelin head 1 and the javelin rod 5 in a clamping state, and the mass gravity center of the javelin head 1, the javelin rod 5 and the counterweight 7 is coincided with the physical axes of the javelin head 1 and the javelin rod 5.

The invention also provides a method for balancing mass gravity center of the intelligent javelin, which uses the intelligent javelin,

s1, selecting a standard gun head 1; the selection is performed according to the actual training requirements, wherein the actual requirements refer to the selection of materials, shapes, weights and the like of the lance head 1 according to the requirements of fields, safety, weather and the like;

s2, installing a sensor in the javelin head 1; since these sensors are widely used in the field of throwing devices, they will not be described in detail here.

S3, tightly connecting the connecting bolt 11 of the javelin head 1 with the clamping structure on the javelin rod 5; that is, the clamping structure is first released, the connecting bolt 11 is placed in the clamping structure, and then the clamping structure is clamped.

S4, rotating the javelin head 1 along the physical axes of the javelin head 1 and the javelin rod 5 to enable the mass center of gravity, the physical axes of the javelin head 1 and the javelin rod 5 and the through groove of the C-shaped shell 21 to be coplanar in space.

S5, selecting the balance weight 7 to be installed in the through groove and connected with the side connecting rod 82, and enabling the mass center of gravity of the javelin head 1, the javelin rod 5 and the balance weight 7 to be coincident with the physical axes of the javelin head 1 and the javelin rod 5.

Therefore, during use of the smart javelin of the present invention, it is preferred to use a standard javelin stick 5, with a series of sensorized javelin heads 1 for different purposes, and a set of weightless, weight-like weights 7 to adjust the center of gravity of the javelin as a whole. If the javelin head 1 needs to be replaced, the counterweight 7 is pushed to one side of the javelin rod 5 by a hand, the javelin head 1 is pulled out, then the counterweight 7 is removed, after a new javelin head 1 is replaced, the mass center of gravity is rotationally adjusted, if needed, the counterweight 7 which is matched with the new javelin head is replaced, and the javelin quality is uniform.

While the foregoing has described in detail the intelligent javelin provided by the present invention, and while the principles and embodiments of the present invention have been illustrated by the use of specific preferred embodiments, these embodiments are merely provided to assist in understanding the principles and core concepts of the present invention, it should be understood that, to those skilled in the art, the embodiments of the present invention may be further combined or substituted, and that several modifications and alterations may be made to the present invention without departing from the spirit and scope of the present invention as defined by the appended claims.

Claims

1. The utility model provides an intelligence javelin, includes javelin head (1) and can dismantle javelin pole (5) of being connected with it, includes sensor and mobile terminal communication connection in javelin head (1), its characterized in that: the javelin head (1) is provided with a connecting bolt (11), the connecting bolt (11) of the javelin head (1) is provided with an axis, a clamping structure is fixedly connected to the javelin rod (5), and the clamping structure is used for clamping or releasing the connecting bolt (11) relative to the axis of the connecting bolt (11);

the clamping structure comprises a shell formed by a C-shaped shell (21), a cover body (22) and an end cover (10) together, a positioning sleeve (4) and a C-shaped support sleeve (9) are abutted against and installed in the shell together, a sliding sleeve (61) is slidably positioned in the positioning sleeve (4), the outer wall of the sliding sleeve (61) is contacted with the inner wall of the positioning sleeve (4), one end of a first spring (62) is abutted against the outer wall of the bottom (611) of the sliding sleeve, the other end of the first spring is abutted against an inward flanging (92) of the C-shaped support sleeve (9), a limiting cover (3) is sealed in the C-shaped shell (21) by the cover body (22), a support core block (64) is arranged in the bottom (611) of the sliding sleeve, a second spring (65) is sleeved on the support core block (64), one end of the second spring (65) is abutted against the inner wall of the bottom (611) of the sliding sleeve, and the other, the plurality of wedge blocks (66) are positioned in a limiting space formed by the limiting cover (3), the sliding sleeve (61) and the umbrella-shaped block (63), the plurality of wedge blocks (66) can clamp or release the connecting bolt (11), the inclined guide surface (31) of the limiting cover (3) and the conical surface of the umbrella-shaped block (63) respectively guide the top surface and the bottom surface of the wedge blocks (66), a central rod (81) is fixedly arranged at the bottom (611) of the sliding sleeve, the central rod (81) can axially slide in the guide cylinder (102) of the end cover (10), the central rod (81) can be detachably and fixedly connected with the counterweight (7) through a connecting side connecting rod (82), and the counterweight (7) is positioned in a through groove of the C-shaped shell (21);

under the clamping state of the clamping structure, a connecting bolt (11) of the javelin head (1) penetrates through center holes of the cover body (22) and the limiting cover (3), the wedge-shaped block (66) is propped against and clamped by an inclined guide surface (31) of the limiting cover (3), the inner wall of the sliding sleeve (61) and the conical surface of the umbrella-shaped block (63) together, and the plurality of wedge-shaped blocks (66) gather towards the center to clamp the connecting bolt (11);

in the releasing state of the clamping structure, the counterweight (7) is subjected to external force to pull the sliding sleeve (61) through the central rod (81) and the side connecting rod (82), the sliding sleeve (61) compresses the first spring (62), the first convex part (661) of the wedge-shaped block (66) enters the space between the sliding sleeve (61) and the inclined guide surface (31), the second convex part (662) of the wedge-shaped block (66) enters the groove on the inner wall of the sliding sleeve (61), the wedge-shaped block (66) slides along the conical surfaces of the inclined guide surface (31) and the umbrella-shaped block (63) in the direction far away from the connecting bolt (11), the connecting bolt (11) is released, the second spring (65) gradually extends to push the umbrella-shaped block (63) in the direction of the wedge-shaped block (66), after the javelet head (1) is separated from the javelet rod (5), the external force is removed from the counterweight (7), and the sliding sleeve (61) moves towards the wedge-shaped block (66) under the action of the first spring, and restoring the clamping structure to the clamped state.

2. The intelligent javelin of claim 1, wherein: the sensor in the javelin head (1) is installed next to the connecting bolt (11), the counterweight (7) is used for balancing the mass gravity center of the javelin head (1) and the javelin rod (5) in a clamping state, and the mass gravity center of the javelin head (1), the javelin rod (5) and the counterweight (7) is coincided with the physical axis of the javelin head (1) and the javelin rod (5).

3. A method of balancing mass center of gravity of an intelligent javelin using the intelligent javelin of claim 2, wherein:

s1, selecting a standard gun head (1);

s2, installing a sensor in the javelin head (1);

s3, tightly connecting a connecting bolt of the javelin head (1) with a clamping structure on the javelin rod (5);

s4, rotating the javelin head along the physical axes of the javelin head (1) and the javelin rod (5) to make the mass center of gravity, the physical axes of the javelin head (1) and the javelin rod (5) and the through groove of the C-shaped shell (21) coplanar in space;

s5, selecting a balance weight (7) to be installed in the through groove and connected with the side connecting rod (82), so that the mass center of gravity of the javelin head (1), the javelin rod (5) and the balance weight (7) is superposed with the physical axes of the javelin head (1) and the javelin rod (5).