CN2339259Y

CN2339259Y - Tennis net frame

Info

Publication number: CN2339259Y
Application number: CN 98235857
Authority: CN
Inventors: 李连生
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 1998-05-30
Filing date: 1998-05-30
Publication date: 1999-09-22
Anticipated expiration: 2008-05-30

Abstract

The utility model discloses a tennis net frame, and a tennis-net is supported by single pulleys and steel cables. The utility model is characterized in that a net post is provided with a force-saving mechanism which is mainly composed of a two-thread worm and a helical gear; the helical gear is engaged with the two-thread worm and is driven by the two-thread worm to rotate; a sleeve is fixed to the helical gear for the steel cables to wind round. Tensed by the force-saving mechanism, without looseness, the tennis net can stay at the optional position, and has brisky swinging, convenient trimming and accurate size, providing reliable assurance for tennis training, recreation and regular competitions.

Description

A kind of Tennis net frame

The utility model relates to a kind of ball-collecting rack.

At present, widely used Tennis net frame, the tensioning of net with get loose, regulated by the ratchet that is fixed on the net post, the structure of this form adjust trouble, and size is inaccurate.

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art part, proposes a kind of Tennis net frame, and the tensioning of its net is adjusted by the effort-saving mechanism that is installed on the net post with getting loose.

For achieving the above object, the technical solution adopted in the utility model is: two net posts are arranged, and steel wire rope is used for propping up hangs a net, and its end is fixed on the net post, pulley and effort-saving mechanism are installed on another root net post, and the other end of steel wire rope is strained through effort-saving mechanism by pulley.The structure of effort-saving mechanism is, bracing frame and net post fix, and casing is installed on the bracing frame, two ends and the casing of worm screw link, and can rotate in casing, helical gear and worm engaging, its gear shaft is positioned on the bracing frame, and can rotate in bracing frame, lay winding wire ropes on gear shaft.

Advantage of the present utility model is:

1, the tensioning of net with get loose by the effort-saving mechanism adjustment, fine setting is convenient, can rest on the optional position, size is accurate.

2, because worm screw is vertical transmission with helical gear transmission, promptly can only drive helical gear by worm screw, helical gear can not drive worm screw, does not get loose after making the steel wire rope tensioning, has played self-locking action.

3, effort-saving mechanism is easy and simple to handle, shakes briskly, and general operation person can use.

Fig. 1 is a structure diagram of the present utility model.

Fig. 2 is the profile of a kind of effort-saving mechanism among Fig. 1.

Fig. 3 is an A-A profile among Fig. 2.

Below in conjunction with accompanying drawing the utility model is described in further detail.

By shown in Figure 1, pulley 4 and effort-saving mechanism 5 are installed on net post 7,2 extensions of net 3 usefulness steel wire ropes, steel wire rope 2 compresses or fixes with rope hook by the steel wire rope briquetting at an end of net post 1, the other end is strained until dimensional requirement through effort-saving mechanism 5 by pulley 4, handle 6 puts when using, and unloads after using up.

By Fig. 2, shown in 3, bracing frame 13 fixes with net post 7, and casing 8 is installed on the bracing frame 13, and available hexagon socket head cap screw 14 is fixed.The two ends of double-thread worm 15 and casing 8 link, and can rotate in casing 8.Helical gear 9 and double-thread worm 15 engagements, its gear shaft is positioned on the bracing frame 13, and can rotate in bracing frame 13.Preferably be provided with sleeve 10 on the axle of helical gear 9, fixed with spring catch 12, lay winding wire ropes 2 on sleeve 10, and hex bolts 11 is housed, and the other end of steel wire rope 2 just is enclosed within on the bolt 11.

Consider that the tennis court is outdoor more, for avoiding the Exposure to Sunlight rain and dew, the erosion that wind time rain is beaten, pulley 4 is installed in net post 7 pipes, and makes the net post cap with the steel part of chromium plating and seal the mouth of pipe, in order to avoid the interior ponding of pipe.

Effort-saving mechanism casing 8 adopts totally-enclosed, does not expose, and inner face is also filled with the higher lubricating oil of concentration, thereby guarantees non-corroding, uses freely brisk at any time.

During use, with handle 6 rotary worms 15, drive helical gear 9, the rotation of handle 6 different directions makes net 3 tensions or gets loose.

This effort-saving mechanism is not only applicable to Tennis net frame, and is applicable to badminton bracket, vollyball frame etc.

Claims

1. Tennis net frame, two net posts (1) are arranged, (7), steel wire rope (2) is used for propping up an extension net (3), its end is fixed on the net post (1), go up installation pulley (4) at another root net post (7), of the present utility model being characterised in that: go up installation effort-saving mechanism (5) at net post (7), the other end of steel wire rope (2) is strained through effort-saving mechanism (5) by pulley (4), the structure of effort-saving mechanism (5) is, bracing frame (13) fixes with net post (7), casing (8) is installed on the bracing frame (13), and two ends of worm screw (15) and casing (8) link, and can rotate in casing (8), helical gear (9) and worm screw (15) engagement, its gear shaft is positioned on the bracing frame (13), and can rotate lay winding wire ropes on gear shaft (2) in bracing frame (13).

2. Tennis net frame according to claim 1 is characterized in that: between helical gear shaft and steel wire rope (2) sleeve (10) is set.