CN201363516Y

CN201363516Y - Compaction mechanism

Info

Publication number: CN201363516Y
Application number: CNU2009200891104U
Authority: CN
Inventors: 崔林; 田军铁; 邓波; 周中平; 张涛; 闻兴立
Original assignee: Henan Coal Science Research Institute Co Ltd
Current assignee: Henan Coal Science Research Institute Co Ltd
Priority date: 2009-03-24
Filing date: 2009-03-24
Publication date: 2009-12-16
Anticipated expiration: 2019-03-24

Abstract

The utility model relates to a compaction mechanism, comprising a screw rod and a screw pair which are connected through screw threads. A compacting cone is sleeved on the non-threaded segment of the other end of the screw rod, a gland bush is sleeved at the inner side of a screw cap at the end of the non-threaded segment, and the gland bush and the compacting cone are connected through a thrust bearing. A tubular screw pair protecting cover with the inner diameter bigger than the outer diameter of the screw pair is sleeved at the outer side of the threaded segment of the screw rod. The thrust bearing and a rubber spring are installed at the end of the screw rod, on which force moment is exerted, which has sealing and elastic compacting functions while reducing the friction, and the screw pair protecting cover is installed at the threaded segment of the screw rod, so the screw rod is free from external contamination under harsh working environment, thus realizing compaction easily. The compaction mechanism is simple in structure, convenient to operate, free of maintenance and long in service life and saves labor. Therefore, the compaction mechanism is quite good for popularization and application.

Description

Hold-down mechanism

One, technical field:

The utility model belongs to a kind of press instrument in constructional engineering machinery field, is specifically related to a kind of hold-down mechanism.

Two, background technique:

In constructional engineering machinery, often use hold-down mechanism at present, and need impacting force to regulate at any time.Following at present two kinds of structures (as Fig. 1, Fig. 2): be first kind of the simplest leading screw and nut mechanism of structure shown in the accompanying drawing 1, because of screw mandrel or nut directly contact with compacted, when impacting force was big, turn is difficulty very; Second kind of hold-down mechanism shown in the accompanying drawing 2 solved this problem from structure, but this hold-down mechanism structure more complicated.More than two kinds of hold-down mechanisms all have a problem in structure: leading screw and nut mechanism is directly exposed in the working environment, when under environment comparison harsh conditions, working for a long time, on-the-spot dust, the surface that working medium could bond even be set in feed screw nut cause very difficulty of turn equally.

Three, model utility content:

The utility model is to overcome the deficiency that prior art exists, and it is little but also be not subjected to the hold-down mechanism of external environmental to design and produce a kind of not only frictional force.

Technological scheme:

A kind of hold-down mechanism, comprise the screw mandrel and the screw pair that are threaded, on non-threaded section of the screw mandrel the other end, be set with compression taper, and the nut inboard of (screw mandrel need apply an end of moment) is set with gland in this section termination, wherein is connected by thrust-bearing between gland and the compression taper.Thereby reduce the frictional force between compression taper and the mechanical compaction face.

Be set with the screw pair protecting jacket of tubular in the thread section outside of screw mandrel, the internal diameter of this screw pair protecting jacket is slightly larger than the screw pair external diameter.Owing to produce pressure between screw mandrel and the screw pair, there is big frictional force between the two, need between to add lubricant oil usually, the existence of screw pair protecting jacket has effectively prevented the pollution of hold-down mechanism when abominable working environment.

Between gland bearing support and compression taper, also be set with cyclic spring pad (being rubber spring).Can guarantee to have between compression taper and the mechanical compaction end face effect of sealing, elastic compression.

Be fixedly connected with a sleeve pipe that is sleeved on non-threaded section of the screw mandrel on the little head end of described compression taper, described screw pair protecting jacket is installed in this tube ends.

Described screw pair protecting jacket directly is fixed on the screw mandrel end, perhaps is installed in the screw mandrel end by link.

Described screw pair protecting jacket directly is fixed on tube ends, perhaps is installed in tube ends by link.

Described link is two semi-ring cards, and two semi-ring cards axially are fixed on screw mandrel or tube ends, installs by screw between two semi-ring cards and the screw pair protecting jacket, and two semi-rings help installing and the location.

The beneficial effects of the utility model:

1, only realizes by a pair of screw pair.An end that applies moment on the screw mandrel is equipped with thrust-bearing and rubber spring, plays the effect of sealing and elastic compression when reducing friction.

2, the thread section of screw mandrel is tapped screw pair (screw) and screw pair protecting jacket.The screw pair protecting jacket is fixed on two semi-rings by Cock screw.The two halves annulate shaft plays the positioning action between screw mandrel and the screw pair protection overcoat to being fixed on the screw mandrel.The advantage of this mechanism is: in bad working environment, be not subjected to the influence of outside contamination, realize easily compressing.

3, the utlity model has simple in structurely, handle laborsaving convenience, the advantage of non-maintaining long service life is beneficial to promotion and implementation very much.

Four, description of drawings:

Fig. 1 is one of structural representation of existing hold-down mechanism;

Fig. 2 be existing hold-down mechanism structural representation two;

Fig. 3 is the structural representation of hold-down mechanism of the present utility model.

Numbering 1 (1a, 1b) among the figure is screw mandrel; 2 (2a, 2b) are screw pair (screw), and 3 is thrust-bearing, and 4 is the screw pair protecting jacket; 5 is gland; 6 is the cyclic spring pad, and 7 is bearing support, and 8 is compression taper; 9 is sleeve pipe; 10 are link (can be two semi-ring cards), and 11 for compressing an end of machinery, and 12 is Cock screw.

Five, specific embodiments:

Embodiment one: referring to Fig. 3, a kind of hold-down mechanism, comprise screw mandrel 1 and screw pair 2, wherein screw mandrel 1 is divided into thread section (being positioned at downside) and non-threaded section (being positioned at upside), the thread section of screw mandrel 1 and screw pair (screw) 2 are by being threaded, be set with compression taper 8 on non-threaded section of screw mandrel 1, can rotate flexibly between the two, and be set with gland 5 in the nut inboard of non-threaded section one end of screw mandrel, wherein between gland 5 and the compression taper 8 bearing support is installed, makes between gland 5 and the compression taper 8 to be connected by thrust-bearing 3.

Be fixedly connected with a sleeve pipe 9 that is sleeved on non-threaded section of the screw mandrel on the little head end of described compression taper 8

Be set with the screw pair protecting jacket 4 of tubular in the thread section outside of screw mandrel 1; wherein screw pair protecting jacket 4 is fixed on the thread section place of screw by two semi-ring cards 10; be fixed together by Cock screw 12 between screw pair protecting jacket 4 and the two semi-ring cards 10, the internal diameter of described screw pair protecting jacket 4 is slightly larger than the screw pair external diameter.

Between gland bearing support 7 and compression taper 8, also be set with cyclic spring pad 6.

Embodiment two: accompanying drawing is not drawn, and meaning and embodiment one are basic identical, and something in common does not repeat, and different is: described screw pair protecting jacket 4 is fixed on sleeve pipe 9 ends, perhaps is installed in sleeve pipe 9 ends by link 10.

Claims

1, a kind of hold-down mechanism, comprise the screw mandrel and the screw pair that are threaded, it is characterized in that: on non-threaded section of the screw mandrel the other end, be set with compression taper, and be set with gland, wherein be connected by thrust-bearing between gland and the compression taper in the nut inboard of this section termination; Be set with the screw pair protecting jacket of tubular in the thread section outside of screw mandrel, the internal diameter of this screw pair protecting jacket is greater than the screw pair external diameter.

2, hold-down mechanism according to claim 1 is characterized in that: also be set with the cyclic spring pad between gland bearing support and compression taper.

3, hold-down mechanism according to claim 1 is characterized in that: be fixedly connected with a sleeve pipe that is sleeved on non-threaded section of the screw mandrel on the little head end of described compression taper, described screw pair protecting jacket is installed in this tube ends.

4, hold-down mechanism according to claim 1 is characterized in that: described screw pair protecting jacket directly is fixed on the screw mandrel end, perhaps is installed in the screw mandrel end by link.

5, hold-down mechanism according to claim 4 is characterized in that: described screw pair protecting jacket directly is fixed on tube ends, perhaps is installed in tube ends by link.

6, according to claim 4 or the described hold-down mechanism of 5 arbitrary claims; it is characterized in that: described link is two semi-ring cards; two semi-ring cards axially are fixed on screw mandrel or tube ends, install by screw between two semi-ring cards and the screw pair protecting jacket.