CN201201305Y

CN201201305Y - Concrete mixer axle end structure

Info

Publication number: CN201201305Y
Application number: CNU2008200344894U
Authority: CN
Inventors: 韦家义; 宋树军
Original assignee: Xuzhou Handler Special Vehicle Co Ltd
Current assignee: Xuzhou Handler Special Vehicle Co Ltd
Priority date: 2008-04-25
Filing date: 2008-04-25
Publication date: 2009-03-04
Anticipated expiration: 2018-04-25

Abstract

The utility model discloses a shaft end structure for a concrete mixer. The shaft end of an agitator shaft is provided with a bearing and a sealing mechanism. The shaft end structure is characterized in that the bearing is a sliding bearing; the sealing mechanism is as follows: a shaft sleeve is arranged between a bearing block and the agitator shaft, and the shaft sleeve is in tight fit with the agitator shaft and rotates with the agitator shaft through a key; an inner ring of the shaft sleeve is provided with two O-shaped rubber sealing rings; the side which is in contact with the concrete is provided with a wearable rubber cap; the shaft sleeve is enclosed by an inner ring of the rubber cup, and the outer ring is impacted by a flange and is fixed on the bearing block; and two sealing members are arranged on the bearing block, and forms a seal at a position where the bearing block is matched with the shaft sleeve, and thus the shaft end sealing device for the concrete mixer is formed. The sufficient lubrication of the sliding bearing, the seal of the shaft end, and the quick replacement of wearing parts are ensured, and at the same time, the shaft end structure is optimized and a more sufficient mounting space is provided to the agitator.

Description

The concrete mixer shaft end structure

Technical field

The utility model relates to a kind of axle end sealing device of concrete mixer, is particularly useful for dual horizontal shaft type concrete mixer.

Background technology

Concrete mixer is that cement, aggregate, additive and water are evenly stirred the concrete special-purpose machinery of preparation.Dual horizontal shaft type concrete mixer is a forced mixer.The concrete mixer shaft end structure has comprised shaft end seal and supporting, and shaft end seal is meant the sealing at shaft and wallboard place, mixing drum two ends.Shaft end seal is reliable, and spillage is avoided at the position that mixing drum two ends axis hole is linked to each other with axle, and makes the bearing of shaft not be subjected to the invasion and attack of cement mortar, and therefore, shaft end seal is a kind of important device.When being to satisfy the compact structure needs, the difficult point of this device guarantees the reliability that seals again.

At present, the sealing device of the dual horizontal shaft type concrete mixer shaft end versions that adopt as shown in Figure 2 more, promptly self-aligning roller bearing and thrust bearing support and two seals, its complex structure, tight fit is many, the dismounting difficulty, and should not be applied to the occasion of compact conformation.Because the cement concrete construction does not allow long-time interruption, can consumable accessory change one of important performance that just becomes concrete pump fast.The replacing of sealing often needs to spend half a day even one day, has a strong impact on engineering construction.

And, stirring under the equal-sized situation of the diameter of axle, adopt traditional axle head device can make that the structure of mixer is huger, installing space also need more abundant can.

Summary of the invention

The purpose of this utility model is: a kind of concrete mixer shaft end structure of simple compactness is provided, in the sealing and consumable accessory fast changeable two hang-ups that solve concrete mixer shaft end, the axle head structure is optimized.

The purpose of this utility model is achieved in that the concrete mixer shaft end structure, axle head at shaft is provided with bearing and sealing mechanism, it is characterized in that, described bearing is a sliding bearing, described sealing mechanism is: an axle sleeve is set between bearing block and the shaft, and this axle sleeve makes it rotate with shaft with shaft close-fitting merga pass key; The axle sleeve inner ring is provided with two O type rubber seal; Be provided with the abrasive rubber leather cup in a side that contacts with concrete, the inner ring of this rubber cup is hugging axle sleeve, and the outer ring is by flange screw and be fixed on the bearing block; Two seals are set on bearing block, and these two seals form sealing in the cooperation place of bearing block and axle sleeve, constitute the concrete mixer shaft end seal device with this.

Further improvement of the utility model has following prioritization scheme:

1, on the bearing block between these two seals, has one slurry discharging hole and one and let out stock tank, on bearing block, have an oil filling passage and an oil groove, this oil filling passage leads to the lubricant reservoir of rubber cup side, and oil groove leads to sliding bearing;

2, be provided with the 3rd O type rubber seal at end cap.

The operation principle of optimal design of the present utility model is: first road is sealed into the rubber cup sealing; two seals are set in the cooperation place of bearing block and axle sleeve; wearing and tearing bad time when rubber cup; cement mortar is by the first road seal sealing; on bearing block, have a slurry discharging hole between two seals with letting out stock tank; after the second road seal also weares and teares badly; cement mortar is then discharged from slurry discharging hole through letting out stock tank; this moment, three seals spare then played the effect of protection sliding bearing; enter the inner chamber of first seal and rubber cup formation through passage from lubricating cup when lubricating oil; play lubrication; and after the rubber cup wearing and tearing; stirring wheel rotates lubricating oil and can ooze out in mixing drum, thereby the prevention cement mortar is attacked the gap into rotational parts.Two O type rubber seal and being embedded in the axle sleeve, cement mortar can't pass through easily.The O type rubber seal of end caps (the 3rd O type rubber seal) plays the dust seal effect.

The utility model provides a kind of axle head structure of concrete mixer of simple compactness, in the sealing and consumable accessory fast changeable that guarantee sliding bearing sufficient lubrication, axle head, optimized the axle head structure, for mixer provides more abundant installing space.

Description of drawings

Fig. 1 is the utility model structural representation.

O type rubber seal 1, end cap 2, bearing block 3, sliding bearing 4, lubricating cup 5, axle sleeve 6, O type rubber seal 7, seal 8, lubricating cup 9, seal 10, O type rubber seal 11, flange 12, flange 13, abrasive rubber leather cup 14, shaft 15, mixing drum end plate 16, slurry discharging hole 17, let out stock tank 18, passage 19, oil groove 20.

Fig. 2 is the prior art structural representation.

Self-aligning bearing 21, lining 22, major axis cover 23, thrust ball bearing 24, float grease seal 25, sealing ring 26, mixing drum end plate 16, shaft 15.

The specific embodiment

Embodiment 1, with reference to Fig. 1,

Support shaft 15 with sliding bearing 4, sliding bearing 4 cooperates with

bearing block

3, and 3 of bearing blocks are connected with flange 12 bolts on being fixed on mixing drum end plate 16; An axle sleeve 6 is set between bearing block 3 and shaft 15, it makes it rotate with shaft 15 with shaft 15 close-fitting merga pass keys, axle sleeve 6 inner rings are provided with two O

type rubber seal

7 and 11, in this side that contacts with concrete an abrasive rubber leather cup 14 is set, its inner ring is hugging axle sleeve 6 outer rings and is then compressing and be fixed on the bearing block 3 by flange 13, two

seals

8 and 10 are set on bearing block 3, in the cooperation place formation sealing of bearing block 3 with axle sleeve 6, between two

seals

8 and 10, on bearing block 3, have together slurry discharging hole 17 and one and let out stock tank 18, on bearing block 3, have an oil filling passage 19 and an oil groove 20, passage 19 is toward the lubricant reservoir 18 of rubber cup 16 sides, oil groove 20 leads to sliding bearing 4, end cap 2 is provided with an O type rubber seal 2, has so just constituted the concrete mixer shaft end seal device.

Repeatedly say; the operation principle of present embodiment is: first road is sealed into rubber cup 14 sealings; cooperation place at bearing block 3 and axle sleeve 6 is provided with two

seals

8 and 10; wearing and tearing bad time when rubber cup 14; cement mortar is by 8 sealings of the first road seal; on bearing block 3, have a slurry discharging hole 17 between two seals with letting out stock tank 18; after the second road seal 8 also weares and teares badly; cement mortar is then discharged from slurry discharging hole 17 through letting out stock tank 18; this moment, 8 of three seals spares played the effect of protection sliding bearing 4; when lubricating oil enters the inner chamber that enters first seal 8 and rubber cup 14 formation through passage 19 from lubricating cup 9; play lubrication; and after rubber cup 14 wearing and tearing, stirring wheel rotates lubricating oil and can ooze out in mixing drum, thereby the prevention cement mortar is attacked the gap into rotational parts.Two O

type rubber seal

7 and 11 are embedded in the axle sleeve 6, and cement mortar can't pass through easily.O type rubber seal 2 plays the dust seal effect.

The most easy to wear in the utility model structure is axle sleeve 6, because of cement mortar can be set on the rubber cup 14, can aggravate the wearing and tearing of axle sleeve 6, therefore, need make regular check on, change, it damages the back rapid wearing, and mortar passes two seals and flows out from slurry discharging hole 17 through the stock tank 18 of letting out of bearing block 3, if very quick-wearing is also incited somebody to action in untimely replacing, seal 8.The replacing way of axle sleeve 6 is: with the top wire hole of screw by M16 bearing block 3 outwards being ejected is replaceable axle sleeve 6, then bearing block 3 is resetted, and loads onto new axle sleeve 6, pounds into getting final product with "painted-face" character in opera.

The utility model structure only adopts an axle sleeve and a sliding bearing to make bearing block structure simpler, and bearing block just can solve sliding bearing, multi-sealed installation, make that the dismounting of axle end sealing device is simpler and more direct, make that the axle head device is compacter, the overall structure of concrete mixer is more ingenious.

The utility model to be to be provided with the method for an axle sleeve 6, makes rapid wear originally and the axle end sealing device that is difficult to dismounting is reliably used, and axle sleeve 6 only needs 1/5th of traditional structure as its replacing time of consumable accessory to change easily.Effective fast continuity for concrete construction that consumable accessory is changed provides reliable assurance; In addition, because the damage of consumable accessory can not have influence on the operate as normal of whole axle end sealing device, thereby removed the fatal influence of the bad seals in the bearing block greatly low to the complete machine operation.

Claims

1, a kind of concrete mixer shaft end structure, axle head at shaft (15) is provided with bearing and sealing mechanism, it is characterized in that, described bearing is a sliding bearing (4), described sealing mechanism is: between bearing block (3) and the shaft (15) axle sleeve (6) is set, this axle sleeve (6) makes it rotate with shaft (15) with shaft (15) close-fitting merga pass key; Axle sleeve (6) inner ring is provided with two O type rubber seal (7,11); Be provided with abrasive rubber leather cup (14) in a side that contacts with concrete, the inner ring of this rubber cup (14) is hugging axle sleeve (6), and the outer ring is by flange screw and be fixed on the bearing block (3); Two seals (8,10) are set on bearing block (3), and these two seals (8,10) are in the cooperation place formation sealing of bearing block (3) with axle sleeve (6).

2, according to the described concrete mixer shaft end structure of claim 1, it is characterized in that, on the bearing block (3) between two seals (8,10), have one slurry discharging hole (17) and let out stock tank (18), on bearing block (3), have an oil filling passage (19) and an oil groove (20), this oil filling passage (19) leads to the lubricant reservoir of rubber cup (14) side, and oil groove (20) leads to sliding bearing (4).

3, according to claim 1 or 2 described concrete mixer shaft end structures, it is characterized in that, be provided with the 3rd O type rubber seal (2) at end cap.