CN214419183U

CN214419183U - Rear sealing structure of mixer truck

Info

Publication number: CN214419183U
Application number: CN202022498278.XU
Authority: CN
Inventors: 刘云昌; 韩伟; 王飞
Original assignee: Wuhu Cimc Ruijiang Automobile Co Ltd
Current assignee: Wuhu Cimc Ruijiang Automobile Co Ltd
Priority date: 2020-10-31
Filing date: 2020-10-31
Publication date: 2021-10-19
Anticipated expiration: 2030-10-31

Abstract

The utility model provides a rear sealing structure of a mixer truck, which has reliable sealing and easy maintenance, and comprises a rotary sealing component, wherein the rotary sealing component comprises a movable ring, a fixed ring and a sealing cover; the fixed ring comprises an assembly part and a sealing part, the assembly part is fixedly connected to a material inlet and outlet of the mixing drum, and the sealing part is positioned on one side of the assembly part, which is far away from the axial direction of the mixing drum; the fixed ring is sleeved on the sealing part and is rotationally connected with the fixed ring; the sealing cover is fixedly connected with the fixing ring, between the sealing cover and the movable ring, and the movable ring and the sealing part are both hermetically accommodated with a sealing ring.

Description

Rear sealing structure of mixer truck

Technical Field

The utility model relates to a sealed technical field of trucd mixer, in particular to seal structure behind trucd mixer.

Background

The mixer truck is a special vehicle widely applied to engineering and building industries, can automatically complete charging and discharging work, and requires that materials in a mixing drum are continuously mixed at a constant speed in the transportation process so as to ensure that the carried concrete cannot be solidified. The existing sealing device is complex to manufacture, large in overall weight, easy to damage the seal at the slewing bearing and high in maintenance cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a seal structure behind trucd mixer reliable, easy to maintain.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the rear sealing structure of the mixer truck is characterized by comprising a rotary sealing assembly, wherein the rotary sealing assembly comprises a movable ring, a fixed ring and a sealing cover; the fixed ring comprises an assembly part and a sealing part, the assembly part is fixedly connected to a material inlet and outlet of the mixing drum, and the sealing part is positioned on one side of the assembly part, which is far away from the axial direction of the mixing drum; the fixed ring is sleeved on the sealing part and is rotationally connected with the fixed ring; the sealing cover is fixedly connected with the fixing ring, between the sealing cover and the movable ring, and the sealing ring is hermetically accommodated between the movable ring and the sealing part.

Preferably, the seal arrangement further comprises a support assembly, the rotary seal assembly being connected to the frame by the support assembly.

Preferably, the supporting assembly comprises a support, two supporting shafts and a plurality of connecting pieces, the support is fixedly connected to the frame, the two supporting shafts are supported by the support, one end of each supporting shaft extends into a positioning hole formed in the peripheral wall of the fixed ring, and the plurality of connecting pieces are connected between the fixed ring and the movable ring and used for enabling the movable ring to rotate relative to the fixed ring.

Preferably, the support comprises two supporting beams, the two supporting beams extend along the axial direction of the mixing drum, rollers are connected to the two supporting beams in a rolling mode, and the supporting shafts penetrate through the rollers and are connected with the rollers in a rotating mode.

Preferably, the connecting piece comprises a stud, a connecting seat, a pressing pin and a ball, the stud penetrates through the sealing cover and the fixing ring, the front end of the stud is fixedly connected with the connecting seat, the pressing pin is fixedly connected with the connecting seat, the ball is connected between the assembling portion and the pressing pin in a rolling manner, and the rear end of the stud is connected with the sealing cover and the fixing ring into a whole through a nut.

Preferably, the sealing cover and the outer peripheral wall of the fixing ring extend inwards to form a mounting groove, the mounting groove completely penetrates through the sealing cover and the fixing ring, and the stud is arranged in the mounting groove in a penetrating mode.

Preferably, the rear end of the hold-down pin is provided with a containing cavity, the front end face of the assembling portion extends backwards to form an annular groove, and the ball is contained in the containing cavity and the annular groove.

Preferably, a flange plate is sleeved at the rear end of the mixing drum, and the flange plate is welded with the mixing drum and connected with the assembling part through bolts.

Preferably, a gasket is sealingly accommodated between the fitting portion and the flange.

The utility model also provides a mixer truck, including the churn, adopted foretell seal structure behind the mixer truck, back seal structure connects the business turn over feed inlet department of churn.

According to the above technical scheme, the utility model provides a pair of trucd mixer has following advantage and positive effect at least:

1. a movable sealing surface is formed between the sealing ring and the movable ring between the sealing cover and the movable ring, so that materials can be prevented from permeating outwards. Even if this sealing washer became invalid, the sealing washer between sealed lid and the retainer plate to and the sealing washer between retainer plate and the movable ring can carry out two and seal, prevent that the material from continuing outwards permeating. Through twice sealed mode, can effectively keep apart the material in the churn, played fine sealed effect.

2. The sealing cover, the fixing ring and the movable ring are mutually independent and can be detached, and after the sealing ring is abraded seriously, the parts can be quickly disassembled and assembled, so that the sealing ring is maintained and replaced more conveniently.

3. Before sealed lid assembles the churn, can follow the sealed lid of the steady transmission of axial of churn through the gyro wheel, help promoting the assembly efficiency of sealed lid.

4. After sealed lid assembles the churn, can play limiting displacement to the retainer plate through the back shaft on the gyro wheel, prevent that the retainer plate from rotating along with the movable ring, make sealed lid and feeder hopper frame relatively keep static, guaranteed the sealed stability of covering and feeder hopper business turn over material.

Drawings

Fig. 1 and 2 are schematic structural diagrams of a portion where the sealing assembly is located in the embodiment of the present invention.

Fig. 3 is a schematic partial structure diagram of a sealing assembly according to an embodiment of the present invention.

Fig. 4 is a schematic view of a connection structure of the support assembly and the sealing assembly according to an embodiment of the present invention.

The reference numerals are explained below: 1. a mixing drum; 2. a seal assembly; 20. a support; 21. a flange plate; 221. a stud; 222. a connecting seat; 223. a hold down pin; 224. a ball bearing; 23. a first seal ring; 24. a stationary ring; 241. assembling a groove; 25. a movable ring; 251. an assembling portion; 252. a sealing part; 26. a second seal ring; 27. a third seal ring; 28. a fourth seal ring; 29. a sealing cover; 291. a roller; 292. a support shaft; 3. a feed hopper; 4. a discharge hopper; 5. and a discharging cylinder.

Detailed Description

Exemplary embodiments that embody features and advantages of the present invention will be described in detail in the following description. It is to be understood that the invention is capable of other and different embodiments and its several details are capable of modification without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature and not as restrictive.

Referring to fig. 1, the embodiment provides a mixer truck, which can be used for mixing and transporting concrete. The mixer truck generally includes a truck frame (not shown), a mixing drum 1 rotatably mounted on the truck frame, and a rotary seal unit 2 located at the rear end of the mixing drum 1, and the rotary seal unit 2 is supported by the truck frame.

The front end of the mixing drum 1 is in transmission connection with a driving device arranged on the frame, and is driven by the driving device to rotate relative to the frame for mixing materials in the mixing drum. The rear end of the mixing drum 1 is open, namely a material inlet and a material outlet of the mixing drum 1 are formed, and the rotary sealing component 2 is installed at the material inlet and the material outlet and is used for sealing the material inlet and the material outlet of the mixing drum 1.

In the present embodiment, the front end and the rear end are both referred to the cab of the mixer truck, the portion close to the cab of the mixer truck is the front end, and the portion far from the cab is the rear end.

The concrete connection mode of the mixing drum 1, the driving device and the frame can refer to the prior related art, and the application does not further describe.

Referring to fig. 3, the swing seal assembly 2 includes a movable ring 25, a stationary ring 24, and a seal cover 29.

The movable ring 25 is fixedly connected with the mixing drum 1, specifically, a flange 21 is sleeved at the rear end of the mixing drum 1, the flange 21 is connected with the mixing drum 1 into a whole by welding, and the flange 21 and the movable ring 25 are connected into a whole by bolts, so that the movable ring 25 can synchronously rotate along with the rotation of the mixing drum 1.

The movable ring 25 in this embodiment is formed by two annular members, and for convenience of description, the movable ring 25 is axially separated into an assembly portion 251 and a sealing portion 252, which are connected to each other, according to a functional partition, the assembly portion 251 is engaged with the flange 21 for fixing the movable ring 25 on the mixing drum 1, and a first sealing ring 23 is hermetically accommodated between the assembly portion 251 and the flange 21 for preventing the material in the mixing drum 1 from penetrating through a gap between the flange 21 and the assembly portion 251; the sealing part 252 is located on one axial side of the assembling part 251 departing from the mixing drum 1, and the sealing part 252 and the assembling part 251 are provided with axial through holes which are communicated with each other and used for enabling materials in the mixing drum 1 to continuously move backwards after passing through the material inlet and outlet and fall on the discharging hopper 4 after being separated from the sealing cover 29 so as to realize discharging.

The stationary ring 24 is annular and is rotatably connected to the movable ring 25, and in this embodiment, the stationary ring 24 is fitted around the outer periphery of the sealing portion 252, and a second sealing ring 28 is sealingly accommodated between the stationary ring 24 and the sealing portion 252 to prevent the material in the mixing drum 1 from being spread outward through the gap between the stationary ring 24 and the movable ring 25.

Sealed lid 29 is discoid, with retainer plate 24 fixed connection, in this embodiment, the mounting hole has been seted up to the relevant position of sealed lid 29 and retainer plate 24, wears to be equipped with the bolt in this mounting hole for link into an integrated entity sealed lid 29 and retainer plate 24, sealed lid 29 bottom run through the ground offer with the discharge gate of business turn over material mouth intercommunication, this discharge gate department installs the bin gate, this bin gate is used for opening or seals the discharge gate of sealed lid 29.

The feeding hopper 3 is fixedly arranged on the sealing cover 29, the discharging cylinder 5 is arranged between the feeding hopper 3 and the sealing cover 29, the fixed end of the discharging cylinder 5 is arranged on the feeding hopper 3, and the movable end of the discharging cylinder is connected with the charging door and used for driving the charging door to open or close the discharging hole of the sealing cover 29.

A third seal 27 and a fourth seal 26 are hermetically accommodated between the seal cover 29 and the stationary ring 24 and between the seal cover 29 and the movable ring 25, respectively, for preventing the material in the mixer drum 1 from spreading outward through a gap between the seal cover 29 and the movable ring 25 and a gap between the seal cover 29 and the stationary ring 24.

The sealing mechanism of the seal assembly 2 in this embodiment is as follows:

the material in the mixing drum 1 flows out from the material inlet and outlet, and then is output outwards through the material outlet of the sealing cover 29, and the position easy to permeate is at the connecting position of the sealing cover 29 and the movable ring 25. When the mixing drum 1 rotates, the movable ring 25 rotates along with the mixing drum 1, and a movable sealing surface is formed between the movable ring 25 and the fourth sealing ring 26 and used for preventing materials from permeating outwards. When the fourth sealing ring 26 fails, the material can penetrate outwards through the joint of the movable ring 25 and the sealing cover 29, and the third sealing ring 27 between the sealing cover 29 and the fixed ring 24 and the second sealing ring 28 between the fixed ring 24 and the movable ring 25 perform two sealing operations to prevent the material from further penetrating outwards.

Through the dynamic seal of the fourth seal ring 26 and the second seal ring 28 and the static seal cooperation of the third seal ring 27, the materials can be effectively isolated, and a good sealing effect is achieved.

The seal assembly 2 in this embodiment is connected to the vehicle frame by a support assembly.

Referring to fig. 1 and 3, the support assembly includes a bracket 20, two rollers 291, and a plurality of links.

The support 20 is fixedly installed on the frame, and the support 20 includes two supporting beams, the length direction of the supporting beam extends along the axial direction of the mixing drum 1, and the two supporting beams are parallel and distributed at intervals and are respectively located on two sides of the mixing drum 1.

The two rollers 291 are respectively connected to the two support beams in a rolling manner, a support shaft 292 is rotatably connected to the rollers 291 in a penetrating manner, the support shaft 292 extends along the width direction of the support beams, and one end of the support shaft 292 extends into a positioning hole formed in the peripheral wall of the fixing ring 24.

A plurality of connectors are connected between the stationary ring 24 and the movable ring 25 in an annular arrangement with respect to the axes of the stationary ring 34 and the movable ring 25 for establishing rotational connection between the stationary ring 24 and the movable ring 25.

The connector includes a stud 221, a coupling seat 222, a hold down pin 223, and a ball 224. The sealing cover 29 and the outer peripheral wall of the fixing ring 24 extend inwards to form a mounting groove 241, the mounting groove 241 completely penetrates through the sealing cover 29 and the fixing ring 24, and the stud 221 is arranged in the mounting groove 241 in a penetrating mode and provided with a threaded portion and a connecting portion; the connecting part is positioned at the front end of the fixed ring 24, the connecting part of the connecting seat 222 is fixedly connected with the connecting part of the stud 221, the pressing pin 223 is fixedly connected at the front end of the connecting seat 222, the rear end of the pressing pin 223 is provided with an accommodating cavity, the ball 224 is arranged in the accommodating cavity, the front end surface of the assembling part of the movable ring 25 extends backwards to form an annular groove, and the ball 224 is connected between the accommodating cavity of the pressing pin 223 and the annular groove of the movable ring 25 in a rolling manner; the screw portion is located at the tip of the seal cap 29, and the stud 221 is fixed to the seal cap 29 by a nut.

Before the seal cap 29 is fitted to the mixer drum 1, the second seal ring 28 is fitted into the mounting groove of the stationary ring 24, the third seal ring 27 and the fourth seal ring 26 are fitted into the mounting groove of the seal cap 29, and the stationary ring 24 and the seal cap 29 are integrally connected by a bolt, so that the third seal ring 27 is sealingly accommodated between the seal cap 29 and the stationary ring 24.

Two supporting shafts 292 are respectively inserted into two positioning holes of the fixing ring 24, and the sealing cover 29 or the hopper is hung by a hoisting tool such as a crane, so that the rollers 291 on the supporting shafts 292 are connected to the supporting beams in a rolling manner; the seal cover 29 is driven to move along the support beam until the second seal ring 28 and the fourth seal ring 26 are sealingly received between the stationary ring 24 and the seal portion 252, and between the seal cover 29 and the seal portion 252, respectively.

The stud 221 of the connecting piece is inserted into the assembling groove 241 of the fixed ring 24 and the sealing cover 29, the connecting piece is pulled backwards, the ball 224 is connected between the pressing pin 223 and the assembling part 251 in a rolling mode, then the connecting piece is fixed on the sealing cover 29 through the nut matched with the stud 221, therefore, the sealing cover 29 is assembled on the stirring barrel 1, and the rotating connection of the fixed ring 24 and the movable ring 25 is achieved.

The sealing cover 29, the fixed ring 24 and the movable ring 25 in the embodiment are independent from each other, are convenient to disassemble and assemble, and are beneficial to realizing the quick replacement of the sealing ring after the sealing ring is seriously abraded.

Before the sealing cover 29 is assembled on the mixing drum 1, the sealing cover 29 can be stably conveyed along the axial direction of the mixing drum 1 through the roller 291, and the assembling efficiency of the sealing cover 29 is improved.

After the sealing cover 29 is assembled on the mixing drum 1, the supporting shaft 292 on the roller 291 can also limit the fixed ring 24, so that the fixed ring 24 is prevented from rotating along with the movable ring 25, the sealing cover 29 and the feed hopper 3 are kept static relative to the frame, and the sealing of the sealing cover 29 and the feeding and discharging stability of the feed hopper 3 are ensured.

While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. The rear sealing structure of the mixer truck is characterized by comprising a rotary sealing assembly, wherein the rotary sealing assembly comprises a movable ring, a fixed ring and a sealing cover; the fixed ring comprises an assembly part and a sealing part, the assembly part is fixedly connected to a material inlet and outlet of the mixing drum, and the sealing part is positioned on one side of the assembly part, which is far away from the axial direction of the mixing drum; the fixed ring is sleeved on the sealing part and is rotationally connected with the fixed ring; the sealing cover is fixedly connected with the fixing ring, between the sealing cover and the movable ring, and the sealing ring is hermetically accommodated between the movable ring and the sealing part.

2. The mixer truck rear seal arrangement of claim 1 further comprising a bearing assembly, said rotary seal assembly being connected to the frame by the bearing assembly.

3. The rear sealing structure of the mixer truck according to claim 2, wherein the supporting assembly comprises a bracket, two supporting shafts and a plurality of connecting pieces, the bracket is fixedly connected to the frame, the two supporting shafts are supported by the bracket, one end of each supporting shaft extends into a positioning hole formed in the peripheral wall of the fixed ring, and the plurality of connecting pieces are connected between the fixed ring and the movable ring and used for enabling the movable ring to rotate relative to the fixed ring.

4. The rear sealing structure of the mixer truck according to claim 3, wherein the support comprises two support beams, the two support beams extend along the axial direction of the mixing drum, rollers are connected to the support beams in a rolling manner, and the support shafts are arranged in the rollers in a penetrating manner and are connected with the rollers in a rotating manner.

5. The rear sealing structure of the mixer truck according to claim 3, wherein the connecting member comprises a stud, a connecting seat, a pressing pin and a ball, the stud is inserted into the sealing cover and the fixing ring, the front end of the stud is fixedly connected with the connecting seat, the pressing pin is fixedly connected with the connecting seat, the ball is connected between the assembling portion and the pressing pin in a rolling manner, and the rear end of the stud is connected with the sealing cover and the fixing ring into a whole through a nut.

6. The rear sealing structure of the mixer truck according to claim 5, wherein the sealing cover and the outer peripheral wall of the fixing ring extend inward to form a fitting groove, the fitting groove completely penetrates through the sealing cover and the fixing ring, and the stud is inserted into the fitting groove.

7. The rear sealing structure of the mixer truck according to claim 5, wherein a receiving cavity is formed at the rear end of the pressing pin, the front end surface of the assembling portion extends backwards to form an annular groove, and the ball is received in the receiving cavity and the annular groove.

8. The rear sealing structure of a mixer truck according to claim 1, wherein a flange is fitted around the rear end of the mixing drum, and the flange is welded to the mixing drum and is connected to the fitting portion by a bolt.

9. The mixer truck rear seal structure according to claim 8, wherein a seal ring is sealingly housed between the fitting portion and the flange.

10. A mixer truck comprising a mixing drum, wherein a rear sealing structure of the mixer truck according to any one of claims 1 to 9 is used, said rear sealing structure being connected to a feed/discharge opening of said mixing drum.