CN203009617U

CN203009617U - Dual-pressing-ring expansion sleeve

Info

Publication number: CN203009617U
Application number: CN2012206871125U
Authority: CN
Inventors: 马国聪; 任鹏; 曾顺利; 孙菊花
Original assignee: NINGXIA TIANDI NORTHWEST COAL MACHINERY CO Ltd
Current assignee: NINGXIA TIANDI NORTHWEST COAL MACHINERY CO Ltd
Priority date: 2012-12-13
Filing date: 2012-12-13
Publication date: 2013-06-19
Anticipated expiration: 2022-12-13

Abstract

The utility model provides a dual-pressing-ring expansion sleeve. The dual-pressing-ring expansion sleeve comprises an inner pressing ring sleeve, a first outer pressing ring sleeve, long bolts, a second outer pressing ring sleeve and short bolts. By the adoption of the dual-pressing-ring expansion sleeve, when a transmission shaft and a wheel hub are mounted in a matching mode, the wheel hub is sleeved on the dual-pressing-ring expansion sleeve, an expandable through groove can guarantee that the transmission shaft penetrates through an axial cylindrical channel of an inner pressing ring sleeve, so that the dual-pressing-ring expansion sleeve and the wheel hub are tensioned, wherein the long bolts and the short bolts apply axial pressing force to the dual-pressing-ring expansion sleeve so that the inner pressing ring sleeve tightly holds a shaft. A first outer pressing ring sleeve and a second pressing ring sleeve are used for expanding the wheel hub so as to generate huge pressing force, and in a working process, friction force generated by the pressing force is used for transmitting a torque and an axial force, so that the problems that the requirements on the circular degree of the shaft and the wheel hub are high, the transmitted axial force and torque are small, and a contact area is small in a working process when an expansion sleeve Z9 is used are further solved.

Description

Two pressure ring expansion sets

Technical field:

The utility model relates to a kind of expansion set, particularly a kind of pair of pressure ring expansion set.

Background technique:

Expansion set is the instrument of transmitted power in the belt conveyer running, the claimant mainly uses the expansion set of Z2, Z5, three kinds of structures of Z9 at present, please refer to Fig. 1 and Fig. 2, Z9 expansion set 1 comprises inner pressure ring 2, bolt 3, outer press ring 4, in the using process of Z9 expansion set, due to expansion set short in conjunction with length, the real contact area of outer press ring and inner pressure ring does not reach the desired design value when nonideality is worked, thereby the axial force of transmission and torque are all decreased, and the Z9 expansion set is higher to the circularity required precision of supporting axle and wheel hub.

Summary of the invention:

In view of this, be necessary to provide a kind of pair of pressure ring expansion set, this pair pressure ring expansion set can overcome the axial force that the Z9 expansion set in use has relatively high expectations, transmits the circularity of axle and wheel hub and torque is less, the less problem of area of contact during work.

a kind of pair of pressure ring expansion set, this pair pressure ring expansion set comprise inner pressure ring cover, the first external pressure ring set, stay bolt, the second external pressure ring set and lag bolt, the inner pressure ring cover comprise "T"-shaped shape clamping rings section and with a toroidal surface round table-like compressed part connected vertically of clamping rings section, clamping rings section has cylindrical channel, the larger disc of the diameter of round table-like compressed part contacts with the less toroidal surface of clamping rings section, round table-like compressed part offers axial cylindrical channel, and the cylindrical channel coaxial communication of the cylindrical channel of round table-like compressed part and clamping rings section, the cylindrical channel of round table-like compressed part is identical with the diameter of the cylindrical channel of clamping rings section, axially offer the breathing groove of perforation on the jacket wall of inner pressure ring cover, the breathing groove is communicated with the cylindrical channel of inner pressure ring cover, the first external pressure ring set, the second outer press ring puts the breathing groove that axially offers perforation, and the first external pressure ring set, the passage of the second external pressure ring set becomes round table-like, and the first external pressure ring set, the round table-like compressed part of the passage of the second external pressure ring set and inner pressure ring cover is suitable, the first external pressure ring set, the second external pressure ring set is sleeved on round table-like compressed part, stay bolt axially passes clamping rings section, the first external pressure ring set, the second external pressure ring set and lag bolt axially pass clamping rings section, the first outer press ring is embedded with the first external pressure ring set, the second external pressure ring set is relative fixing with the inner pressure ring cover.

Preferably, stay bolt, lag bolt are high-strength bolt.

realize coordinating between transmission shaft and wheel hub when installing with above-mentioned pair of pressure ring expansion set, wheel hub is sleeved on two pressure ring expansion sets, can guarantee that by the breathing groove transmission shaft passes the axial circular column passage of inner pressure ring cover, and make swelling between two pressure ring expansion sets and wheel hub, wherein stay bolt applies axial pressing force for two pressure ring expansion sets, make the inner pressure ring cover hold axle tightly, the first external pressure ring set, the second external pressure ring set distend wheel hub, thereby produce huge impacting force, during work, utilize frictional force that this impacting force produces with transmitting torque and axial force, and then overcome the Z9 expansion set and in use the circularity of axle and wheel hub is had relatively high expectations, axial force and the torque of transmitting are less, the problem that area of contact during work is less.

Description of drawings:

Accompanying drawing 1 is the structural representation of Z9 expansion set in prior art.

Accompanying drawing 2 is that the A-A of Z9 expansion set in Fig. 1 is to cross-sectional view.

Accompanying drawing 3 is structural representations of two pressure ring expansion sets of a better embodiment.

Fig. 4 is that the B-B of two pressure ring expansion sets in Fig. 3 is to cross-sectional view.

Fig. 5 is the application structure schematic diagram of two pressure ring expansion sets in Fig. 3.

In figure: Z9 expansion set 1, inner pressure ring 2, bolt 3, outer press ring 4, two pressure ring expansion set 10, inner pressure ring cover 11, clamping rings section 111, cylindrical channel 1110, round table-like compressed part 112, breathing groove 113, cylindrical channel 1120, the first external pressure ring set 12, breathing groove 121, stay bolt 13, the second external pressure ring set 14, breathing groove 141, lag bolt 15, transmission shaft 20, wheel hub 30.

Embodiment:

Present embodiment is that the outer press ring with the Z9 expansion set changes split-type structural into from monolithic construction, be about to an original outer press ring and be decomposed into two little outer press rings, utilize at work the mutual adjusting of two outer press rings, can increase the real contact area of expansion set, and the requirement of axle and wheel hub circularity etc. is decreased, thereby transmit larger axial force and torque.

Please refer to Fig. 3 and Fig. 4, two pressure ring expansion sets 10 comprise inner pressure ring cover the 11, first external pressure ring set 12, stay bolt 13, the second external pressure ring set 14 and lag bolt 15.

inner pressure ring cover 11 comprise "T"-shaped shape clamping rings section 111 and with a toroidal surface round table-like compressed part 112 connected vertically of clamping rings section 111, clamping rings section 111 has cylindrical channel 1110, the larger disc of the diameter of round table-like compressed part 112 contacts with the less toroidal surface of clamping rings section 111, round table-like compressed part 112 offers axial cylindrical channel 1120, and cylindrical channel 1110 coaxial communication of the cylindrical channel 1120 of round table-like compressed part 112 and clamping rings section 111, the cylindrical channel 1120 of round table-like compressed part 112 is identical with the diameter of the cylindrical channel 1110 of clamping rings section 111, axially offer the breathing groove 113 of perforation on the jacket wall of inner pressure ring cover 11, the cylindrical channel 1110 of breathing groove 113 and inner pressure ring cover 11, cylindrical channel 1120 is communicated with.

the first external pressure ring set 12, axially offer the breathing groove 121 of perforation on the second external pressure ring set 14, breathing groove 141, breathing groove 121, breathing groove 141 and the first external pressure ring set 12, the channel connection of the second external pressure ring set 14, the first external pressure ring set 12, the passage of the second external pressure ring set 14 becomes round table-like, and the first external pressure ring set 12, the shape of the round table-like compressed part 112 of the passage of the second external pressure ring set 14 and inner pressure ring cover 11, size is suitable, the first external pressure ring set 12, the second external pressure ring set 14 is sleeved on round table-like compressed part 112, the first external pressure ring set 12 is near clamping rings section 111, stay bolt 13 axially passes clamping rings section 111, the first external pressure ring set 12, the second external pressure ring set 14 and lag bolt 15 axially pass clamping rings section 111, the first external pressure ring set 12 is with the first external pressure ring set 12, the second external pressure ring set 14 is relative fixing with inner pressure ring cover 11.In the present embodiment, stay bolt 13, lag bolt 15 are high-strength bolt.

please be simultaneously referring to Fig. 5, realize coordinating between transmission shaft 20 and wheel hub 30 when installing with above-mentioned pair of pressure ring expansion set 10, wheel hub 30 is sleeved on two pressure ring expansion sets 10, by breathing groove 113, breathing groove 121, breathing groove 141 can guarantee that transmission shaft 20 passes the axial circular column passage 1110 of inner pressure ring cover 11, cylindrical channel 1120, and make swelling between two pressure ring expansion sets 10 and wheel hub 30, wherein stay bolt 13 and lag bolt 15 apply axial pressing force for two pressure ring expansion sets 10, make inner pressure ring cover 11 hold transmission shaft 20 tightly, the first external pressure ring set 12, the second external pressure ring set 14 swelling wheel hubs 30, thereby produce huge impacting force, during work, utilize frictional force that this impacting force produces with transmitting torque and axial force.

According to calculating and test result, above-mentioned pair of pressure ring expansion set compared with the Z9 expansion set and had the following advantages:

1) lightweight;

2) on axle on unit area pressure and hub unit area pressure ratio less, the performance of internal member axle is reduced greatly;

3) utilize the mutual adjusting of two outer press rings, the real work area of contact is large, and to axle

And the requirement of wheel hub circularity etc. decreases;

4) transmit very large axial force and torque, resistance to flexure is high, and nominal torque has improved 20% on Z9 expansion set original base;

5) have good interchangeability, use the unified standard instrument to carry out dismounting, dismounting is very convenient;

6) stress distribution is even.

Claims

1. two pressure ring expansion set, it is characterized in that: this pair pressure ring expansion set comprises inner pressure ring cover, the first external pressure ring set, stay bolt, the second external pressure ring set and lag bolt, the inner pressure ring cover comprise "T"-shaped shape clamping rings section and with a toroidal surface round table-like compressed part connected vertically of clamping rings section, clamping rings section has cylindrical channel, the larger disc of the diameter of round table-like compressed part contacts with the less toroidal surface of clamping rings section, round table-like compressed part offers axial cylindrical channel, and the cylindrical channel coaxial communication of the cylindrical channel of round table-like compressed part and clamping rings section, the cylindrical channel of round table-like compressed part is identical with the diameter of the cylindrical channel of clamping rings section, axially offer the breathing groove of perforation on the jacket wall of inner pressure ring cover, the breathing groove is communicated with the cylindrical channel of inner pressure ring cover, the first external pressure ring set, the second outer press ring puts the breathing groove that axially offers perforation, and the first external pressure ring set, the passage of the second external pressure ring set becomes round table-like, and the first external pressure ring set, the round table-like compressed part of the passage of the second external pressure ring set and inner pressure ring cover is suitable, the first external pressure ring set, the second external pressure ring set is sleeved on round table-like compressed part, stay bolt axially passes clamping rings section, the first external pressure ring set, the second external pressure ring set and lag bolt axially pass clamping rings section, the first outer press ring is embedded with the first external pressure ring set, the second external pressure ring set is relative fixing with the inner pressure ring cover.

2. according to claim 1 pair of pressure ring expansion set, it is characterized in that: stay bolt, lag bolt are high-strength bolt.