CN215136672U

CN215136672U - Net height adjusting device

Info

Publication number: CN215136672U
Application number: CN202120728059.8U
Authority: CN
Inventors: 李沐阳; 胡松喜; 李璞; 钟安林
Original assignee: Shaoguan University
Current assignee: Shaoguan University
Priority date: 2021-04-09
Filing date: 2021-04-09
Publication date: 2021-12-14
Anticipated expiration: 2031-04-09

Abstract

A net height adjusting device comprises a snap ring, a positioning unit and a tightening unit, wherein the snap ring is sleeved on a net supporting rod; the number of the clamping rings is more than 2, and the positioning unit and the tightening unit are respectively arranged on different clamping rings; the positioning unit is positioned above the tightening unit, and the tightening unit can rotate to tighten or loosen a net hanging rope. Compared with the prior art, the utility model discloses a net height adjusting device can adjust the height of net fast, accurately.

Description

Net height adjusting device

Technical Field

The utility model relates to the technical field of sports equipment, especially, relate to a net height adjustment device.

Background

In games such as badminton, volleyball and the like, the net is an indispensable sports apparatus, and the standard height of the net is usually different according to the types of games. Taking a volleyball game as an example, the height of a net for male volleyball is 2.43 meters, the height of a net for female volleyball is 2.24 meters, the height of a net for teenager male volleyball is 2.24 to 2.35 meters, and the height of a net for teenager female volleyball is 2.10 to 2.24 meters.

Referring to fig. 1, two ends of a centerline of a court are respectively provided with a support rod 1, the ground height of the support rods 1 is generally 2.5 m, and the underground embedded depth is generally 0.2 m. The hanging ropes 3 arranged at the two sides of the net 2 are respectively and directly tied to the two supporting rods 1 for fixing. However, this fixing means is liable to cause the net to be highly unstable due to the hanging rope being loosened, or the net 2 is not tightened. In addition, a hook or the like is installed on the support stick 1 by welding or the like for tightening and fixing the net 2 in the prior art, but since the hook is fixed, it is inconvenient to change the height of the net, and it is laborious to tighten the net.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model aims at providing a net height adjusting device to the height of net is adjusted in accuracy, swiftly.

The utility model discloses a following technical scheme realizes:

a net height adjusting device comprises a snap ring, a positioning unit and a tightening unit, wherein the snap ring is sleeved on a net supporting rod; the number of the clamping rings is more than 2, and the positioning unit and the tightening unit are respectively arranged on different clamping rings; the positioning unit is positioned above the tightening unit, and the tightening unit can rotate to tighten or loosen a net hanging rope.

Compared with the prior art, the utility model discloses a net height adjusting device passes through snap ring installation positioning unit and tightens up the unit, and by positioning unit location net height, by tightening up the taut net of unit, the snap ring can reciprocate fast and can fix firmly on the bracing piece of net to realize quick, the accurate adjustment of net height.

Further, the clamping ring comprises a shaft sleeve and two mounting plates extending along the axial direction of the shaft sleeve; the mounting plate is positioned on the outer wall of the shaft sleeve; the shaft sleeve is provided with an opening extending along the axial direction of the shaft sleeve, and the opening is positioned between the two mounting plates, so that the shaft sleeve has elasticity.

Furthermore, the positioning unit comprises a main bolt which is arranged on the two mounting plates in a penetrating way and is mounted through a nut and a guide wheel which is connected between the two mounting plates in a shaft connection way; the main bolt is positioned between the shaft sleeve and the guide wheel; the nuts mounting the main bolts are turned to make the two mounting plates approach or separate from each other. The main bolt is convenient for the elasticity of the snap ring pair to realize the rapid adjustment of the position, and the guide wheel is convenient for the arrangement of the tightening of the hanging rope on the guide wheel.

Further, the tightening unit comprises a ratchet wheel, a pawl, a rotating shaft and a tightening bolt, wherein the ratchet wheel and the pawl are positioned on the outer side of the mounting plate, and the rotating shaft and the tightening bolt are coaxially fixed with the ratchet wheel; the pawl is in shaft connection with the mounting plate; the rotating shaft penetrates through the two mounting plates and is fixed through nuts; the pawl is positioned above the ratchet wheel and locks the ratchet wheel; the tightening bolt is arranged on the two mounting plates in a penetrating mode and mounted through nuts, and the tightening bolt is located between the shaft sleeve and the rotating shaft. The ratchet wheel is utilized to drive the rotating shaft to rotate so as to receive and release the hanging rope, the self weight of the pawl locks the ratchet wheel to prevent the hanging rope from loosening, and the bolt is tightened to realize the quick fixation and movement of the clamping ring.

Further, the device also comprises an auxiliary bolt; the number of the clamping rings is 3, and the positioning units, the auxiliary bolts and the tightening units are sequentially arranged on different clamping rings from top to bottom; the auxiliary bolts penetrate through the two mounting plates of the same clamping ring and are fixed through nuts. The auxiliary bolt plays a role in preventing the net from deforming.

Furthermore, the center of the rotating shaft of the pawl, the axis of the ratchet wheel and the joint point of the pawl and the ratchet wheel are on the same circle, and the connecting line of the center of the rotating shaft of the pawl, the axis of the pawl and the joint point of the ratchet wheel is perpendicular to the connecting line of the axis of the ratchet wheel and the joint point of the pawl and the ratchet wheel, so that the pawl has the best locking effect on the ratchet wheel.

Further, the axis of the main bolt and the axis of the guide wheel are in the same horizontal plane, and the distance between the axes is larger than the radius of the guide wheel, so that the stable installation of the clamping ring is maintained.

Further, the leading wheel is equipped with circumferential recess, hangs the rope setting in order to improve stability in the recess.

Furthermore, the rotating shaft is provided with a through hole extending along the radial direction of the rotating shaft, the through hole is positioned between the two mounting plates, and the hanging rope penetrates through the through hole to be fixed on the rotating shaft.

Furthermore, one end of the rotating shaft, which is far away from the ratchet wheel, is also provided with an L-shaped handle so as to facilitate the rotation of the rotating shaft.

For a better understanding and an implementation, the present invention is described in detail below with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic view of a prior art net mounting;

FIG. 2 is a schematic view of the overall structure of the device for adjusting the height of a ball net according to the present invention;

FIG. 3 is a schematic structural view of a snap ring according to the present invention;

fig. 4 is a schematic structural diagram of the positioning unit of the present invention;

fig. 5 is a schematic structural view of a tightening unit in the present invention;

FIG. 6 is a projection view of the present invention along the axial direction of the rotating shaft;

fig. 7 is a schematic structural view of the middle rotating shaft of the present invention;

fig. 8 is an installation schematic diagram of the auxiliary bolt of the present invention.

Detailed Description

When the net height adjusting device of the utility model is used, the required net height adjusting devices are two groups and are respectively arranged on the support rods 1 at the two ends of the court midline so as to tension the net from the two sides.

Specifically, referring to fig. 2, a net height adjusting device of the present invention includes a snap ring 10 sleeved on a support bar 1, a positioning unit 20 for positioning the height of the net 2, and a tightening unit 30 capable of rotating around a shaft. The number of the snap rings 10 is two, the positioning unit 20 and the tightening unit 30 are respectively installed on the two snap rings 10, and the positioning unit 20 is located above the tightening unit 30. The two clamping rings 10 are sequentially sleeved on the support rod 1 along the axial direction of the support rod 1 and can move relative to the support rod 1. Two hanging ropes 3 are arranged on the net 2, one of the hanging ropes 3 is fixed on the positioning unit 20 and moves up and down along the supporting rod 1, and the other hanging rope 3 is wound on the tightening unit 30. When the tightening unit 30 is rotated, since the string 3 on the positioning unit 20 is fixed, the net 2 is pulled tight as the string 3 provided on the tightening unit 30 is wound.

Referring to fig. 3, the snap ring 10 includes a shaft sleeve 11 having an opening 111 along an axial direction and two mounting plates 12 extending along the shaft sleeve 11 along the axial direction. The 12 face of two mounting panels sets up relatively and is located 11 outer walls of axle sleeve, axle sleeve 11 can take place elastic deformation. Preferably, the opening 111 of the sleeve 11 opens between the two mounting plates 12. Preferably, the inner diameter of the shaft sleeve 11 is smaller than or equal to the outer diameter of the support rod 1, so that the shaft sleeve 11 is firmly clamped on the support rod 1.

Referring to fig. 4, the positioning unit 20 includes a main bolt 21 inserted through the two mounting plates 12 and fixed by a nut (not labeled), and a guide wheel 22 coupled between the two mounting plates 12. The main bolt 21 and the guide wheel 22 are parallel to each other in axis. The main bolt 21 is located between the shaft sleeve 11 and the guide wheel 22. Preferably, the axis of the main bolt 21 is perpendicular to the plate surface of the mounting plate 12. Further, the axis of the main bolt 21 and the axis of the guide wheel 22 are in the same horizontal plane and the distance between the axes is larger than the radius of the guide wheel 22. When the nut of the main bolt 21 is locked and installed, the two installation plates 12 are close to each other, so that the shaft sleeve 11 is tightly clamped on the support rod 1; when the nut for mounting the main bolt 21 is loosened, the mounting plates 12 are moved away from each other so that the boss 11 can move on the support bar 1. The guide wheel 22 is provided with a circumferential groove 221, and the hanging rope 3 on the upper side of the net 2 passes through the guide wheel 22 around the groove 221 and then returns to the net 2 to be tensioned and fixed. In the present embodiment, the inner diameter of the shaft sleeve 11 for mounting the snap ring 10 of the positioning unit 20 is 80mm, the outer diameter is 86mm, the axial height is 40mm, the distance between the two mounting plates 12 is 30mm, and the width of the opening 111 of the shaft sleeve 11 is 10 mm; the main bolt 21 is an M6 hexagon bolt, and the total length is 140 mm; the guide wheel 22 has a thickness of 20mm to 29mm and an outer diameter of 50mm to 54 mm.

Referring to fig. 5, the tightening unit 30 includes a ratchet wheel 31 disposed outside one of the mounting plates 12 of the snap ring 10, a pawl 32 disposed on the same side of the ratchet wheel 31, and a rotating shaft 33 coaxially fixed with the ratchet wheel 31. The rotating shaft 33 is inserted into the two mounting plates 12 and fixed by nuts (not labeled), and the nuts for mounting the rotating shaft 33 are rotated, so that the two mounting plates 12 can be close to or separated from each other to limit the movement of the snap ring 10 on the support rod 1. The hanging rope 3 is fixed on the rotating shaft 33, and when the rotating shaft 33 rotates, the hanging rope 3 winds or unwinds the rotating shaft 33. The pawl 32 is journaled to the mounting plate 12. The pawl 32 is located above the ratchet wheel 31 and the stop pawl 321 catches the tooth root surface of the ratchet wheel 31. Without external force, the pawl 32 locks the ratchet wheel 31 against rotation by gravity. Referring to fig. 6, the axial projection along the rotating shaft 33 is derived according to the handbook of design of mechanical parts and the formula of calculating the moment, where the radius of the rotating shaft 33 is R, the maximum radius of the ratchet wheel 31 is R, the friction coefficient between the ratchet wheel 31 and the pawl 32 is μ, and when R/R > μ, self-locking can be achieved. Preferably, assuming that the center of the rotation shaft of the pawl 32 is a point O1, the coupling point of the pawl 32 and the ratchet wheel 31 is a point a, and the axis of the ratchet wheel 31 is a point O, when the point O1, the point a and the point O are on the same circle, and the line AO is perpendicular to the line AO1, the locking effect is the best. Further, referring to fig. 7, the rotating shaft 33 is provided with a through hole 331 extending along a radial direction thereof, and the through hole 331 is located between the two mounting plates 12. In use, the hanging rope 3 passes through the through hole 331 to be fixed to the rotating shaft 33. Further, the one end that pivot 33 kept away from ratchet 31 is equipped with L type handle 332, pulls L type handle 332 can rotate through the lever principle conveniently pivot 33, the installation the nut of pivot 33 with ratchet 31 homonymy. Further, the tightening unit 30 further includes a tightening bolt 34 inserted through the two mounting plates 12 and fixed by a nut (not labeled), the tightening bolt 34 is located between the rotating shaft 33 and the shaft sleeve 11, and the two mounting plates 12 can be moved away from or close to each other by rotating the nut on which the tightening bolt 34 is mounted. In the embodiment, the distance between the plate surfaces of the two mounting plates 12 for mounting the snap ring 10 of the tightening unit 30 is 50mm, and the axial height is 86 mm; the ratchet wheel 31 and the pawl 32 are both made of 40Cr steel, the hardness of the machined surface is improved through heat treatment, and paint is painted on the outer surface; the radius of the shaft of the rotating shaft 33 is 4mm, and the maximum radius of the ratchet wheel 31 is 20 mm; the length of the hand-held part of the L-shaped handle 332 is 100 mm; the diameter of the through hole 331 is 3 mm.

Further, the four corners of the net 2 are easily deformed by being pulled. In order to reduce the deformation, please refer to fig. 8, which also includes auxiliary bolts 40, the number of the snap rings 10 of each group of net height adjusting devices is 3, and the snap ring 10 for mounting the auxiliary bolt 40 is located between the snap ring 10 for mounting the positioning unit 20 and the snap ring 10 for mounting the tightening unit 30. The auxiliary bolt 40 is arranged on the two mounting plates 12 in a penetrating way. Preferably, the auxiliary bolt 40 is unthreaded in the shank between the mounting plates 12 to prevent wear of the lanyard 3. Preferably the axis of said auxiliary bolt 40 is 1240mm from the ground to reduce distortion in the middle of said net 2. In the present embodiment, the auxiliary bolt 40 is an M8 bolt.

When in use, two groups of net height adjusting devices of the utility model are respectively arranged on the two supporting rods 1. Then 3 snap rings 10 are sleeved on the same support rod 1 in sequence. From top to bottom, positioning unit 20, auxiliary bolt 40 and tightening unit 30 set gradually on 3 snap rings. The distance of the positioning unit 20 to the ground and the distance between the positioning unit 20, the auxiliary bolt 40 and the tightening unit 30 are then adjusted according to the type of game. The hanging string 3 on one side of the net 2 is fixed to the positioning unit 20, the auxiliary bolt 40, and the tightening unit 30, respectively, from the top to the bottom. Finally, the rotating shaft 33 of the two side tightening units 30 is rotated to tighten the hanging rope 3 and tighten the net 2. When the height of the net 2 needs to be adjusted again, the snap ring 10 provided with the positioning unit 20 is loosened and moved to a desired position together with the positioning unit 20, and then the rotating shaft 33 is rotated to adjust the tightness of the hanging rope 3.

Compared with the prior art, the utility model discloses a net height adjusting device can adjust the net to required height rapidly, can carry out the tensioning to the net moreover. Can also prevent the deformation of the net, keep the appearance of the net and meet the requirement of games. The net is fixed stably. In addition, the device is provided with a quick adjusting device, so that the height of the net can be easily and simply adjusted.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. The utility model provides a net height adjusting device which characterized in that: comprises a snap ring, a positioning unit and a tightening unit which are sleeved on a ball net supporting rod; the number of the clamping rings is more than 2, and the positioning unit and the tightening unit are respectively arranged on different clamping rings; the positioning unit is positioned above the tightening unit, and the tightening unit can rotate to tighten or loosen a net hanging rope.

2. Net height adjusting device according to claim 1, characterized in that: the clamping ring comprises a shaft sleeve and two mounting plates extending along the axial direction of the shaft sleeve; the mounting plate is positioned on the outer wall of the shaft sleeve; the shaft sleeve is provided with an opening extending along the axial direction of the shaft sleeve, and the opening is positioned between the two mounting plates.

3. Net height adjustment device according to claim 2, characterized in that: the positioning unit comprises a main bolt which is arranged on the two mounting plates in a penetrating way and is mounted through a nut and a guide wheel which is connected between the two mounting plates in a shaft way; the main bolt is positioned between the shaft sleeve and the guide wheel; the nuts mounting the main bolts are turned to make the two mounting plates approach or separate from each other.

4. Net height adjustment device according to claim 2, characterized in that: the tightening unit comprises a ratchet wheel and a pawl which are positioned on the outer side of the mounting plate, a rotating shaft which is coaxially fixed with the ratchet wheel and a tightening bolt; the pawl is in shaft connection with the mounting plate; the rotating shaft penetrates through the two mounting plates and is fixed through nuts; the pawl is positioned above the ratchet wheel and locks the ratchet wheel; the tightening bolt is arranged on the two mounting plates in a penetrating mode and mounted through nuts, and the tightening bolt is located between the shaft sleeve and the rotating shaft.

5. Net height adjusting device according to any one of claims 3 or 4, characterized in that: the auxiliary bolt is also included; the number of the clamping rings is 3, and the positioning units, the auxiliary bolts and the tightening units are sequentially arranged on different clamping rings from top to bottom; the auxiliary bolts penetrate through the two mounting plates of the same clamping ring and are fixed through nuts.

6. Net height adjustment device according to claim 4, characterized in that: the center of the rotating shaft of the pawl, the axis of the ratchet wheel and the joint point of the pawl and the ratchet wheel are on the same circle, and the connecting line of the center of the rotating shaft of the pawl, the joint point of the pawl and the ratchet wheel is vertical to the connecting line of the axis of the ratchet wheel and the joint point of the pawl and the ratchet wheel.

7. Net height adjustment device according to claim 3, characterized in that: the axis of the main bolt and the axis of the guide wheel are in the same horizontal plane, and the distance between the axes is larger than the radius of the guide wheel.

8. Net height adjustment device according to claim 3, characterized in that: the leading wheel is provided with a circumferential groove.

9. Net height adjustment device according to claim 4, characterized in that: the pivot is equipped with and extends its radial extended through-hole, the through-hole is located between two mounting panels.

10. Net height adjustment device according to claim 9, characterized in that: and an L-shaped handle is further arranged at one end of the rotating shaft, which is far away from the ratchet wheel.