CN110038279B

CN110038279B - Basketball stand with backboard easy to lift and convenient to fix lifting position of backboard

Info

Publication number: CN110038279B
Application number: CN201910327779.0A
Authority: CN
Inventors: 徐宇丹
Original assignee: Xuchang University
Current assignee: Xuchang University
Priority date: 2019-04-23
Filing date: 2019-04-23
Publication date: 2021-06-25
Anticipated expiration: 2039-04-23
Also published as: CN110038279A

Abstract

The invention relates to the field of sports equipment, in particular to a basketball stand with a backboard easy to lift and convenient for fixing the lifting position of the backboard. The lifting device comprises a base, two hollow upright posts fixed on the base, a lifting platform which is arranged between the two hollow upright posts in a sliding manner and is used for fixing a backboard, a lifting device used for controlling the lifting of the lifting platform and a locking device used for fixing the lifting position of the lifting platform; the basketball backboard height adjusting device can quickly and conveniently adjust and fix the backboard height in the basketball teaching of students in different grades to adapt to the physical conditions of the students, thereby improving the popularity of basketball sports among the students and stimulating the enthusiasm of the students in sports and exercise.

Description

Basketball stand with backboard easy to lift and convenient to fix lifting position of backboard

Technical Field

The invention relates to the field of sports equipment, in particular to a basketball stand with a backboard easy to lift and convenient for fixing the lifting position of the backboard.

Background

In primary and secondary school education, in order to promote the comprehensive development of the moral and intelligence of students, sports facilities such as basketball courts, football fields and table tennis courts are usually arranged in the campus, sports teachers can carry out sports teaching through the sports facilities, or teachers and students can carry out competitive sports, so that the physical quality of the students is improved, and the physical health of the students is promoted.

Basketball is a competitive sport which mainly aims at shooting scores, so that basketball teaching has higher requirements on the height and muscle strength of students. However, in reality, although students of different grades have great differences in height and muscle strength, the backboard height of the basketball stand in the basketball court is usually the standard height of a formal match, and the backboard height cannot be adaptively adjusted according to a teaching object, so that the shooting hit rate of the students of lower grades is too low in the teaching process, the enthusiasm of the students in basketball movement is met, and the best opportunity for cultivating the interests of the students is missed.

Disclosure of Invention

The invention aims to provide a basketball stand with a backboard easy to lift and convenient to fix the lifting position of the backboard, which can be used for quickly and conveniently adjusting and fixing the height of the backboard in basketball teaching of students in different grades so as to adapt to the physical conditions of the students, thereby improving the popularity of basketball sports in the students and stimulating the enthusiasm of the students in sports and exercise.

In order to solve the technical problems, the invention adopts the technical scheme that: a basketball stand with a backboard easy to lift and convenient to fix the lifting position of the backboard comprises a base, two hollow upright posts fixed on the base, a lifting platform arranged between the two hollow upright posts in a sliding mode and used for fixing the backboard, a lifting device used for controlling the lifting of the lifting platform and a locking device used for fixing the lifting position of the lifting platform;

the lifting device comprises a machine shell arranged on the base and positioned between two hollow stand columns and a plurality of planetary gear trains concentrically arranged in the machine shell, wherein a planetary gear in the planetary gear train positioned at the front end is driven to rotate by a first Z-shaped turning shaft, one end of the first Z-shaped turning shaft, which is back to the planetary gear train, is distributed outside the machine shell and is fixedly provided with a first hand wheel, planetary gears in the planetary gear train positioned at the middle part are in transmission connection with a sun gear in the previous planetary gear train by a second Z-shaped turning shaft, a rope winding roller extending out of the machine shell is connected to the sun gear in the planetary gear train positioned at the rear end, a lifting rope is wound on the rope winding roller, one end of the lifting rope is connected with the rope winding roller, and the other end of the lifting rope is connected with the lifting platform after passing through a fixed pulley arranged between the;

the locking device comprises locking teeth arranged on two sides of the lifting platform and racks respectively arranged on the inner sides of the two hollow stand columns, the two racks are respectively arranged on the corresponding hollow stand columns in a sliding mode along the horizontal direction, the two racks can synchronously slide into inner cavities of the corresponding hollow stand columns through the locking control mechanism to release locking of the racks on the lifting platform, the locking control mechanism comprises ball screws respectively arranged on the hollow stand columns in a rotating mode, screw nuts arranged on the racks and matched with the ball screws and a worm gear box, the worm gear box is fixed on the base and located between the two hollow stand columns, an output shaft of the worm gear box is in transmission connection with the two ball screws through bevel gear sets, and a second hand wheel is fixedly arranged on an input shaft of the worm gear box.

Preferably, the two sides of the lifting platform are respectively provided with a roller, and the inner sides of the hollow upright posts are respectively provided with a track groove for the sliding fit of the rollers.

Preferably, one side of the lifting platform is a hollow part and is provided with an extension rod for fixing the backboard, the other side of the lifting platform is a solid part, and the whole gravity center of the lifting platform and the backboard is balanced between the two hollow upright posts through the solid part.

Preferably, sliding columns are fixedly arranged in the inner cavity of the hollow upright column respectively corresponding to the two ends of the rack, sliding holes in sliding fit with the sliding columns are respectively arranged at the two ends of the rack, and linear bearings are further arranged between the sliding holes and the sliding columns.

Preferably, a protective cover is arranged on the base, the shell and the worm gear box are arranged on the base through the rack and located in the protective cover, and an operation window used for operating the first hand wheel and the second hand wheel is formed in the protective cover.

Preferably, the matching surfaces of the locking teeth and the teeth on the rack are horizontal surfaces.

Advantageous effects

The backboard is fixed on the lifting platform, the lifting platform can be controlled by the lifting device to lift, and the lifting device has a moment amplification function, so that a sports teacher can quickly and conveniently adjust the height of the backboard by a single person, and the preparation time of sports equipment of the sports teacher in different grade teaching intervals is greatly shortened. After the lifting platform is lifted to a proper height, the lifting height of the lifting platform can be fixedly locked by the locking device. The locking device has the functions of moment amplification and self-locking, and the convenience of single-person operation is kept through the moment amplification function; through the self-locking function, the problem that the lifting platform and the backboard fall due to the fact that the rack is uncontrollably retracted caused by hitting vibration of the basketball in basketball teaching or competition can be solved, and the safety of the invention in physical education is improved.

Drawings

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

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic structural view of a lifting device portion of the present invention;

FIG. 4 is a left side view of the present invention;

the labels in the figure are: 1. the lifting device comprises a fixed pulley, 2, a sliding column, 3, a lifting platform, 301, a solid part, 302, a hollow part, 4, locking teeth, 5, a rack, 6, a hollow column, 7, a protective cover, 8, a second hand wheel, 9, a lifting rope, 10, a casing, 11, a rope winding roller, 12, a base, 13, a worm gear box, 14, a bevel gear set, 15, a ball screw, 16, a screw nut, 17, a track groove, 18, a roller, 19, a first hand wheel, 20, a first Z-shaped crank shaft, 21, a planetary gear, 22, a second Z-shaped crank shaft, 23, a sun gear, 24, a gear ring, 25, an extension rod, 26 and a backboard.

Detailed Description

As shown in fig. 1 and fig. 4, the basketball stand with the backboard easy to lift and convenient to fix the lifting position of the backboard of the invention comprises a base 12 which is horizontally placed, two hollow upright posts 6 are vertically fixed on the base 12 at intervals, and a lifting platform 3 for fixing the backboard 26 is arranged between the two hollow upright posts 6. The lifting platform 3 can drive the backboard 26 to slide along the vertical direction under the driving of the lifting device, and the lifting height positions of the lifting platform 3 and the backboard 26 can be locked and fixed under the action of the locking device. The lifting device and the locking device have the labor-saving function of amplifying the moment, so that the sports teacher can operate by one person, and time and labor are saved.

As shown in fig. 2, the cross section of the lifting platform 3 of the present invention is substantially i-shaped, and rollers 18 are rotatably provided at four corners, respectively. Correspondingly, two opposite sides of the two hollow upright posts 6 are respectively provided with a track groove 17. The rail grooves 17 allow the rollers 18 to roll to lift the lifting platform 3 along the hollow columns 6, and allow the four corners of the lifting platform 3 to be clamped in the grooves, so as to prevent the working platform from slipping off the two hollow columns 6 in the vertical direction of fig. 2.

The lifting platform 3 in this embodiment is an asymmetric structure, and the lower portion of the lifting platform 3 in fig. 2 is a hollow portion 302, which is formed by welding a light plate structure, and is fixedly connected with the backboard 26 through two extending rods 25. In fig. 2, the upper portion of the lifting platform 3 is a solid portion 301, which can be made of a heavy solid steel material, and the purpose of the solid portion is to balance the weight of the backboard 26, so that the center of gravity of the whole body formed by the lifting platform 3 and the backboard 26 is located between the two hollow upright posts 6, thereby preventing the rollers 18 and the track grooves 17 from rolling due to abnormal friction, and improving the stability of the lifting platform 3 during the lifting process and after being locked and fixed.

The lifting device comprises a shell 10 arranged on a base 12 and positioned between two hollow upright posts 6, and a plurality of planetary gear trains coaxially arranged in the shell 10. The plurality of planetary gear trains have the torque amplification effect of inputting the planetary gear 21 and amplifying the output torque by the sun gear 23, and the labor-saving function of torque amplification is realized by connecting the plurality of planetary gear trains in series. Specifically, as shown in fig. 3, each of the two planetary gear trains includes a sun gear 23, a ring gear 24, and a plurality of pinion gears 21 that are simultaneously meshingly connected between the sun gear 23 and the ring gear 24. The planetary gear 21 in the planetary gear train on the left side is driven to rotate by a first Z-shaped crank shaft 20, the left end of the first Z-shaped crank and a sun gear 23 are concentrically distributed outside the casing 10, and a first hand wheel 19 is fixed on the left end of the first Z-shaped crank. The planetary gear 21 in the right planetary gear train is in transmission connection with the sun gear 23 in the left planetary gear train through a second Z-shaped crank shaft 22. A rope winding drum 11 is coaxially connected to a sun gear 23 of the right planetary gear 21, and the rope winding drum 11 is disposed outside the casing 10 and is wound with the lifting rope 9. The lifting rope 9 can be made of a steel wire rope or a nylon rope, one end of the lifting rope is fixed with the rope winding roller 11, and the other end of the lifting rope is connected with the lifting platform 3 after passing around the fixed pulley 1 arranged between the top ends of the two hollow upright posts 6. Through the structure, the first hand wheel 19 is manually rotated, the torque is secondarily amplified by the two planetary gear trains and then is transmitted to the lifting rope 9, and finally the lifting platform 3 is pulled to ascend by the lifting rope 9.

In practical application, more planetary gear trains can be adopted, and the planetary gear 21 in the planetary gear train positioned in the middle is in transmission connection with the sun gear 23 in the previous planetary gear train through the second Z-shaped crank shaft 22, so that a more multistage torque amplification effect is achieved, and the lifting platform 3 is driven by a single person to drive the lifting of the backboard 26 to be more labor-saving.

Still referring to fig. 1, the locking device of the present invention comprises locking teeth 4 disposed on both sides of the lifting platform 3 and racks 5 disposed inside two hollow columns 6, respectively. The two racks 5 are respectively arranged on the corresponding hollow upright posts 6 in a sliding manner along the horizontal direction. Specifically, sliding columns 2 are respectively and fixedly arranged in the inner cavity of the hollow upright post 6 corresponding to the two ends of the rack 5, sliding holes in sliding fit with the sliding columns 2 are respectively arranged at the two ends of the rack 5, and a linear bearing is further arranged between the sliding holes and the sliding columns 2 for further increasing the sliding sensitivity of the rack 5. Under the condition that the racks 5 respectively slide out of the inner cavities of the hollow upright posts 6 as shown in fig. 1, the upper edges of the teeth on the racks 5 support the lower edges of the locking teeth 4, so that the height positions of the lifting platform 3 and the backboard 26 are locked; when the two racks 5 move back to back and slide into the inner cavities of the corresponding hollow upright posts 6, the locking teeth 4 lose support, the locking device releases the locking fixation of the lifting platform 3, and the lifting device can control the lifting device to ascend to a proper height.

The back-to-back or back-to-back sliding of the two racks 5 is synchronous and is driven by a locking control mechanism. The locking control mechanism comprises a ball screw 15, a screw nut 16 and a worm gear box 13, wherein the ball screw 15 is rotatably arranged on the hollow upright post 6, the screw nut 16 is arranged on the rack 5 and is matched with the ball screw 15. Through holes through which the ball screws 15 are inserted are provided in the racks 5, respectively, and screw nuts 16 are fixed to the racks 5 so as to be concentric with the through holes. In order to increase the effective active length of the ball screw 15, the screw nut 16 may be extended into the through hole to provide a more stable translational force to the rack 5. Under the condition that the two ball screws 15 do not interfere with the lower limit position of the lifting platform 3, the ball screws 15 are arranged at the middle position of the hollow upright post 6 as far as possible, so that the phenomenon of locking of the sliding post 2 and a sliding hole or a linear bearing is reduced or avoided as far as possible.

The outer side end of the screw rod is installed in a bearing seat arranged on the inner cavity wall of the hollow upright post 6 in a matching mode, and the inner side ends of the screw rod are respectively and fixedly provided with a bevel gear. The worm and gear box 13 is fixed on the base 12 and located between the two lead screws, the output shaft of the worm and gear box 13 is respectively matched with the two bevel gears through another bevel gear to drive the two ball screws 15 to synchronously rotate, and the input shaft of the worm and gear box 13 is fixedly provided with a second hand wheel 8. Therefore, the two ball screws 15 are synchronously driven to rotate by rotating the second hand wheel 8, and the two racks 5 synchronously slide in a translation mode in the opposite direction or in the opposite direction. When needing to notice, worm gear case 13 has self-locking function, can make the tooth on the rack 5 carry out stable support to locking tooth 4 on the elevating platform 3 after elevating platform 3 and backboard 26 height control are good and through the locking of locking means, avoids the structure to receive external force to produce to rock and leads to rack 5 automatic retraction, can not play the locking function and make elevating platform 3 and backboard 26 fall the condition of hurting the people.

In this embodiment, the matching surfaces of the locking teeth 4 and the teeth on the rack 5 are horizontal surfaces, which is beneficial for the rack 5 to form stable support for the locking teeth 4. The opposite surfaces of the teeth on the locking teeth 4 and the rack 5 are inclined planes, so that the locking teeth 4 and the teeth on the rack 5 are prevented from generating hard impact when the lifting platform 3 is controlled to ascend under the condition that the rack 5 is not completely retracted, the damage and breakage of the teeth are caused, and the service life is influenced.

In a specific use of the invention, first the first hand wheel 19 is turned to slightly raise the lifting table 3, so that the locking teeth 4 disengage from the teeth on the rack 5 in the height direction; then, the second hand wheel 8 is rotated to control the two racks 5 to synchronously slide into the inner cavities of the corresponding hollow upright posts 6, so that the locking teeth 4 are separated from the teeth on the racks 5 along the horizontal direction, and then the first hand wheel 19 can be rotated again to drive the lifting platform 3 to ascend or descend to a proper height; finally, the second hand wheel 8 is rotated again to enable the two racks 5 to synchronously slide out relatively, the lifting platform 3 is supported again, and the first hand wheel 19 can be rotated reversely after the stable support is achieved, so that the force on the lifting rope 9 and the planetary gear train is removed. During the sliding-out process, whether the locking teeth 4 interfere with the sliding track of the rack 5 is observed, and if interference occurs, the first hand wheel 19 is appropriately rotated to enable the locking teeth 4 to avoid the moving track of the rack 5. To avoid repeated interference during adjustment, the teeth on the rack 5 may be spaced relatively widely apart. In the preferred embodiment of the present invention, the base 12 is provided with a protective cover 7 covering the casing 10 and the worm gear box 13, the protective cover 7 is provided with an operation window for operating the first hand wheel 19 and the second hand wheel 8, and the operation window is locked, so as to prevent the mechanism of the present invention from being damaged or causing unnecessary safety accidents due to the fact that students touch the first hand wheel 19 or the second hand wheel 8 by mistake.

Claims

1. The utility model provides a basketball stands that backboard easily goes up and down and be convenient for fixed backboard elevating position which characterized in that: comprises a base (12), two hollow upright posts (6) fixed on the base (12), a lifting platform (3) which is arranged between the two hollow upright posts (6) in a sliding way and is used for fixing a backboard (26), a lifting device used for controlling the lifting of the lifting platform (3) and a locking device used for fixing the lifting position of the lifting platform (3);

the lifting device comprises a machine shell (10) arranged between two hollow upright posts (6) on a base (12) and a plurality of planetary gear trains concentrically arranged in the machine shell (10), wherein a planetary gear (21) in the planetary gear train at the front end is driven to rotate by a first Z-shaped crank shaft (20), one end of the first Z-shaped crank shaft (20) back to the planetary gear train is distributed outside the machine shell (10) and is fixedly provided with a first hand wheel (19), the planetary gear (21) in the planetary gear train at the middle part is in transmission connection with a sun gear (23) in the previous planetary gear train by a second Z-shaped crank shaft (22), a rope winding roller (11) extending out of the machine shell (10) is connected to the sun gear (23) in the planetary gear train at the rear end, a lifting rope (9) is wound on the rope winding roller (11), one end of the lifting rope (9) is connected with the rope winding roller (11), the other end of the lifting platform is connected with the lifting platform (3) after passing around a fixed pulley (1) arranged between the top ends of the two hollow upright posts (6);

the locking device comprises locking teeth (4) arranged on two sides of the lifting platform (3) and racks (5) respectively arranged on the inner sides of the two hollow upright columns (6), the two racks (5) are respectively arranged on the corresponding hollow upright columns (6) in a sliding manner along the horizontal direction, the two racks (5) can synchronously slide into the inner cavities of the corresponding hollow upright columns (6) through a locking control mechanism to release the locking of the racks (5) on the lifting platform (3), the locking control mechanism comprises ball screws (15) respectively rotatably arranged on the hollow upright columns (6), screw nuts (16) arranged on the racks (5) and matched with the ball screws (15) and a worm and gear box (13), the worm and gear box (13) is fixed on the base (12) and positioned between the two hollow upright columns (6), and an output shaft of the worm and gear box (13) is respectively in transmission connection with the two ball screws (15) through a bevel gear set (14), a second hand wheel (8) is fixedly arranged on an input shaft of the worm gear box (13);

the two sides of the lifting platform (3) are respectively provided with a roller (18), and the inner sides of the hollow upright posts (6) are respectively provided with a track groove (17) for the roller (18) to be in sliding fit;

one side of the lifting platform (3) is a hollow part (302) and is provided with an extension rod (25) for fixing the backboard (26), the other side of the lifting platform (3) is a solid part (301), and the whole gravity center of the lifting platform (3) and the backboard (26) is matched between the two hollow upright posts (6) through the solid part (301);

sliding columns (2) are respectively and fixedly arranged in the inner cavity of the hollow upright post (6) corresponding to the positions of two ends of the rack (5), sliding holes in sliding fit with the sliding columns (2) are respectively arranged at two ends of the rack (5), and linear bearings are also arranged between the sliding holes and the sliding columns (2);

a protective cover (7) is arranged on the base (12), the shell (10) and the worm gear box (13) are arranged on the base (12) through a rack and located in the protective cover (7), and an operation window used for operating the first hand wheel (19) and the second hand wheel (8) is formed in the protective cover (7).

2. The basketball stand as claimed in claim 1, wherein the backboard is easy to lift and convenient to fix the lifting position of the backboard, and the basketball stand comprises: the matching surfaces of the locking teeth (4) and the teeth on the rack (5) are horizontal planes; the back surfaces of the locking teeth (4) and the teeth on the rack (5) are inclined surfaces.