1. A sealing device is characterized by comprising a sealing assembly (100), wherein the sealing assembly (100) has elasticity and is configured to provide sealing between a feeding hole (310) of a feeding hopper (300) and a material guiding hole (410) of a mixing drum (400).

2. The sealing device according to claim 1, further comprising an oil supply assembly (200), wherein the oil supply assembly (200) is configured to be capable of supplying lubricating oil to the sealing assembly (100).

3. The sealing device according to claim 2, characterized in that the sealing assembly (100) comprises a first wear part (110), the first wear part (110) being configured to be mountable to an outer wall of the feed opening (310) or an inner wall of the material guiding opening (410) to provide a seal between the feed opening (310) and the material guiding opening (410); the oil supply assembly (200) is configured to supply lubricating oil between the first wear-resistant part (110) and the outer wall of the feed port (310) or between the first wear-resistant part (110) and the inner wall of the material guide port (410) to form a pressure oil film.

4. The blanking device of claim 3, wherein the seal assembly (100) further comprises a second wear part (120); wherein the first wear-resistant piece (110) is configured to be mounted on the outer wall of the feeding hole (310), the second wear-resistant piece (120) is configured to be mounted on the inner wall of the material guiding hole (410), and a seal is formed between the first wear-resistant piece (110) and the second wear-resistant piece (120); the oil supply unit (200) is configured to be able to supply lubricating oil between the first wear member (110) and the second wear member (120) to form a pressure oil film.

5. The sealing device according to claim 4, characterized in that the sealing assembly (100) comprises an elastic member (130), and the elastic member (130) is configured to be disposed at the feeding hole (310) or the material guiding hole (410) to press the first wear-resistant member (110) and the second wear-resistant member (120) against each other.

6. The sealing device according to claim 5, wherein the elastic member (130) is disposed on an outer wall of the feeding port (310), the height of the first wear-resistant member (110) and/or the elastic member (130) is H1, the height of the concrete level in the mixing drum (400) is H2, H1 is k H2, wherein k is 1.5-2, 0< H2 ≤ 1/2D, and D is the diameter of the feeding port (310).

7. The sealing device according to claim 6, characterized in that the elastic member (130) is arranged on the outer wall of the feed opening (310), and the first wear-resistant member (110) is arranged on the elastic member (130); the oil supply assembly (200) includes a first oil supply passage passing through the elastomeric member (130) and providing fluid communication between the second oil supply passage and a source of lubricating oil, and a second oil supply passage passing through the first wear member (110).

8. The material sealing device according to claim 6, wherein the number of the first oil supply channels and the second oil supply channels is multiple, and the multiple first oil supply channels and the multiple second oil supply channels are arranged in a one-to-one correspondence manner; and/or the second oil supply channel has a serpentine oil through slot on the side of the first wear part (110) facing the second wear part (120).

9. A body structure, characterized by comprising a feed hopper (300), a mixing drum (400) and a sealing device according to any one of claims 1 to 8; the feeding opening (310) of the feeding hopper (300) extends into the material guiding opening (410) of the mixing drum (400) and a gap is formed between the feeding opening and the inner wall of the material guiding opening (410), and the material sealing device is arranged in the gap.

10. A mixer vehicle, characterized in that it comprises a body structure according to claim 9.

Background

In the transportation process of the concrete mixer truck, a certain gap is reserved between the feed hopper and the mixing drum, so when the mixer truck runs under specific working conditions such as bumpy road surfaces or uphill slopes, concrete mortar in the mixing drum easily overflows from the gap between the feed hopper and the mixing drum, and the concrete mortar is scattered on the road to cause pollution to the surrounding environment.

At present, in order to solve the problem that concrete mortar overflows from a gap between a feed hopper and a mixing drum, the following two methods are generally adopted in the industry: the first method is to add a receiving device at the tail of the discharge chute, and the second method is to add a reflux device between the mixing drum and the feed hopper of the mixer truck. However, both of the above methods have certain problems: in the first method, because the amount of concrete collected by the receiving device is limited, the risk of concrete overflow when the mixer truck climbs a slope still exists; in the second method, there is a risk of long-term build-up of lumps leading to failure of the reflow apparatus; and when the axis of the mixing drum generates deflection and is bent, the gap between the material guide opening and the material inlet can be changed, so that friction can be generated between the material guide opening and the material inlet, and the two methods can not solve the problem of abrasion of the material guide opening, so that the later maintenance cost is increased.

Disclosure of Invention

The invention aims to overcome the problems in the prior art and provides a material sealing device, a vehicle body structure and a mixer truck.

In order to achieve the above object, the present invention provides, in one aspect, a material sealing device including a sealing assembly having elasticity and configured to provide a seal between a feeding opening of a feeding hopper and a material guiding opening of a mixing drum.

Optionally, the material sealing device further comprises an oil supply assembly configured to be capable of supplying lubricating oil to the sealing assembly.

Optionally, the seal assembly comprises a first wear-resistant part configured to be mountable to an outer wall of the feed inlet or an inner wall of the material guiding opening to provide a seal between the feed inlet and the material guiding opening; the oil supply assembly is configured to be capable of providing lubricating oil between the first wear-resistant part and the outer wall of the feeding hole or between the first wear-resistant part and the inner wall of the material guide opening to form a pressure oil film.

Optionally, the seal assembly further comprises a second wear part; the first wear-resistant part is configured to be installed on the outer wall of the feeding hole, the second wear-resistant part is configured to be installed on the inner wall of the material guiding hole, and a seal is formed between the first wear-resistant part and the second wear-resistant part; the oil supply unit is configured to be able to supply lubricating oil between the first wear member and the second wear member to form a pressure oil film.

Optionally, the sealing assembly includes an elastic member, and the elastic member is configured to be disposed at the feeding hole or the material guiding hole to enable the first wear-resistant member and the second wear-resistant member to be pressed against each other.

Optionally, the elastic member is disposed on an outer wall of the feed port, the height of the first wear-resistant member and/or the elastic member is H1, the height of the concrete liquid level in the mixing drum is H2, H1 is k H2, wherein k is 1.5-2, 0< H2 is not less than 1/2D, and D is the diameter of the feed port.

Optionally, the elastic member is arranged on the outer wall of the feed inlet, and the first wear-resistant member is arranged on the elastic member; the oil supply assembly includes a first oil supply passage passing through the elastomeric member and providing fluid communication between the second oil supply passage and a source of lubricating oil, and a second oil supply passage passing through the first wear member.

Optionally, the number of the first oil supply channels and the number of the second oil supply channels are multiple, and the multiple first oil supply channels and the multiple second oil supply channels are arranged in a one-to-one correspondence manner; and/or the second oil supply channel is provided with a serpentine oil through notch on one side of the first wear part facing the second wear part.

Through the technical scheme, seal assembly can provide sealedly between the feed inlet of feeder hopper and the guide mouth of churn, but, the churn rotates along the rotation axis always in the transportation, receives the concrete action and goes to jolt the influence, and the churn can appear the deformation of different degrees and sink for its rotation axis produces the amount of deflection, and then no longer coaxial setting with the axis of the feed inlet of feeder hopper, promptly, the clearance between guide mouth and the feed inlet changes. The sealing component of the sealing device has elasticity, so that the sealing component can automatically perform clearance compensation and always keep the sealing state between the material guide opening and the material inlet, and the sealing device can provide a good sealing effect between the feed hopper and the mixing drum.

The invention provides a vehicle body structure, which comprises a feed hopper, a mixing drum and the material sealing device; the feed inlet of the feed hopper extends into the material guide opening of the mixing drum and has a gap with the inner wall of the material guide opening, and the material sealing device is arranged in the gap.

The invention further provides a mixer truck, which comprises the truck body structure.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

FIG. 1 is a schematic view of the material sealing device of the present invention used in a mixer truck;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1;

FIG. 3 is a schematic view of the vehicle body structure of the present invention;

fig. 4 is a schematic view of the seal assembly of the sealing device of the present invention.

Description of the reference numerals

100-seal assembly, 110-first wear part, 120-second wear part, 130-elastomeric part,

200-an oil supply unit for supplying oil,

300-a feed hopper, 310-a feed inlet,

400-mixing drum, 410-material guide port

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

As shown in fig. 1 to 4, the sealing device of the present invention includes a sealing assembly 100, and the sealing assembly 100 has elasticity and is configured to provide sealing between the feeding opening 310 of the feeding hopper 300 and the material guiding opening 410 of the mixing drum 400.

In the present invention, the sealing assembly 100 can provide a seal between the feeding opening 310 of the feeding hopper 300 and the material guiding opening 410 of the mixing drum 400, but the mixing drum 400 rotates along the rotating shaft all the time during transportation, and is affected by the action of concrete and the driving jolt, and the mixing drum 400 deforms and sinks to different degrees, so that the rotating shaft generates deflection and is no longer coaxially arranged with the axis of the feeding opening 310 of the feeding hopper 300, that is, the gap between the material guiding opening 410 and the feeding opening 310 is changed. Because the sealing assembly 100 of the sealing device of the present invention has elasticity, it can automatically perform clearance compensation and always maintain the sealing state between the material guiding opening 410 and the material feeding opening 310, and therefore, the sealing device of the present invention can provide a good sealing effect between the feeding hopper 300 and the mixing drum 400.

In addition, because the sealing device of the present invention further includes the oil supply assembly 200, the oil supply assembly 200 can provide lubricating oil to the sealing assembly 100, so that the lubricating oil provided by the oil supply assembly 200 can form a pressure oil film on the sealing assembly 100, and the pressure oil film can lubricate the sealing assembly 100 on one hand, and can prevent a large amount of sand and stone fine particles in the concrete from penetrating into the sealing assembly 100 to affect the service life of the sealing assembly 100 on the other hand.

It should be noted that the sealing assembly 100 may be designed in various forms as long as it can provide a seal between the material inlet 310 and the material guide 410.

In an embodiment of the present invention, the sealing assembly 100 may be a separate sealing structure disposed between the feeding hole 310 and the material guiding hole 410, such as a separate O-ring, in which case, the oil supply assembly 200 supplies lubricating oil to the sealing assembly 100, which is actually supplied to the O-ring, and the lubricating oil supplies lubricating oil between the O-ring and the outer wall of the feeding hole 310 or between the O-ring and the inner wall of the material guiding hole 410 (depending on whether the O-ring is fixedly disposed on the inner wall of the material guiding hole 410 or on the outer wall of the feeding hole 310), in which case, a pressure oil film is formed between the sealing assembly 100 and the outer wall of the feeding hole 310 or between the sealing assembly 100 and the inner wall of the material guiding hole 410, which can reduce the abrasion between the sealing assembly 100 and the feeding hole 310 or the material guiding hole 410, on the one hand, and can prevent a large amount of sand and fine particles in the concrete from entering the friction surface between the sealing assembly 100 and the feeding hole 310 or the material guiding hole 410, and the entered fine particles are removed in time.

In another embodiment, the sealing assembly 100 includes the first wear-resistant member 110, and the first wear-resistant member 110 can be mounted on the outer wall of the feeding hole 310 or the inner wall of the material guiding hole 410 to provide a seal between the feeding hole 310 and the material guiding hole 410, in this case, the oil supplying assembly 200 provides lubricating oil between the first wear-resistant member 110 and the outer wall of the feeding hole 310 or between the first wear-resistant member 110 and the inner wall of the material guiding hole 410.

Further, the first abrasion resistant member 110 may be disposed on an outer wall of the material inlet 310, in this case, in order to reduce abrasion of the first abrasion resistant member 110 to an inner wall of the material guiding opening 410. It is understood that, in this embodiment, the sealing assembly 100 further includes a second wear-resistant member 120, the second wear-resistant member 120 is configured to be mounted on an inner wall of the material guide port 410, and the first wear-resistant member 110 and the second wear-resistant member 120 form a seal therebetween. In this embodiment, since the first wear-resistant member 110 and the second wear-resistant member 120 are respectively installed on the material inlet 310 and the material guiding opening 410, so that the first wear-resistant member 110 and the second wear-resistant member 120 can rotate relatively, and the second wear-resistant member 120 is fixed relative to the material guiding opening 410, the seal assembly 100 can reduce the wear of the first wear-resistant member 110 on the inner wall of the material guiding opening 410 as much as possible without affecting the relative rotation of the material inlet 310 and the material guiding opening 410. Moreover, the first wear-resistant part 110 and the second wear-resistant part 120 can be made of high-strength steel and self-lubricating modified polyurethane wear-resistant materials, so that a large amount of friction heat energy generated during relative movement is avoided, and the service life of the seal assembly 100 is ensured.

In addition, since the second wear-resistant member 120 can be fixedly mounted on the inner wall of the material guiding opening 410, when the material guiding opening 410 rotates relative to the material inlet 310, the inner wall of the material guiding opening 410 does not directly rub against the material inlet 310 or the first wear-resistant member 110, but indirectly contacts with the first wear-resistant member 110 through the second wear-resistant member 120, so that the problem that the material guiding opening 410 is worn for a long time in the prior art is effectively solved, and the service life of the material guiding opening 410 is ensured.

Since the first wear member 110 and the second wear member 120 are always in surface contact with each other, in order to further reduce the wear between the first wear member 110 and the second wear member 120, the oil supply assembly 200 is configured to supply lubricating oil between the first wear member 110 and the second wear member 120 to form a pressure oil film. In this embodiment, the lubricating oil forms a pressure oil film between the friction surfaces of the first wear-resistant member 110 and the second wear-resistant member 120, lubricates and cools the friction surfaces, reduces the wear of the first wear-resistant member 110 and the second wear-resistant member 120, and at the same time, the pressure oil film can prevent a large amount of sand and stone fine particles in the concrete from entering the friction surfaces between the first wear-resistant member 110 and the second wear-resistant member 120 and remove the entered fine particles in time, thereby also improving the service life of the first wear-resistant member 110 and the second wear-resistant member 120.

Further, in an embodiment of the present invention, the sealing assembly 100 further includes an elastic member 130, and the elastic member 130 is configured to be disposed at the feed opening 310 or the material guide opening 410 to press the first wear-resistant member 110 and the second wear-resistant member 120 against each other. It should be noted that the elastic member 130 can be made of a material with good elastic deformation characteristics, or can be made of a shape change of a shaped material, such as an O-shape, a loop shape, a spring, etc., or a combination thereof.

It should be noted that the elastic member 130 may have various arrangements, for example, the elastic member 130 may be arranged to press only the first wear member 110 to press the first wear member 110 against the second wear member 120, the elastic member 130 may also be arranged to press only the second wear member 120 to press the second wear member 120 against the first wear member 110, and of course, the elastic member 130 may also be arranged to be respectively disposed on both sides of the first wear member 110 and the second wear member 120 to press the first wear member 110 and the second wear member 120 toward each other at the same time.

As shown in fig. 3, in an embodiment of the present invention, the elastic member 130 is disposed on an outer wall of the feeding port 310, a height of the first wear-resistant member 110 and/or the elastic member 130 is H1, a height of a concrete level in the mixing drum 400 is H2, H1 is k × H2, where k is 1.5-2, 0< H2 ≤ 1/2D, and D is a diameter of the feeding port 310. Since the relation between the concrete level in the mixing drum 400 and the height of the first wear-resistant member 110 and/or the elastic member 130 satisfies H1 ═ k × H2, when the mixing drum 400 rotates, the concrete therein hardly reaches the height of the first wear-resistant member 110 and/or the elastic member 130, that is, the concrete does not leak out from the top of the first wear-resistant member 110 and/or the elastic member 130. This has the advantage that the first wear-resistant part 110 and/or the elastic part 130 do not need to have a complete annular structure, but only have a circular arc structure to meet the sealing requirement, thereby greatly reducing the manufacturing cost.

It should be understood that the oil supply assembly 200 may be designed in various forms as long as it can supply the lubricating oil between the first and second wear members 110 and 120. For example, in one embodiment of the present invention, the elastic member 130 is disposed on the outer wall of the feed port 310, and the first wear member 110 is disposed on the elastic member 130; the oil supply assembly 200 includes a first oil supply passage passing through the elastomeric member 130 and providing fluid communication between the second oil supply passage and a source of lubricating oil, and a second oil supply passage passing through the first wear part 110.

In order to effectively improve the oil supply amount and the oil supply efficiency of the lubricating oil, in one embodiment of the present invention, the number of the first oil supply channels and the second oil supply channels is multiple, and the multiple first oil supply channels and the multiple second oil supply channels are arranged in a one-to-one correspondence manner.

In order to further improve the degree of uniform distribution of the lubricating oil between the first wear part 110 and the second wear part 120, in one embodiment of the invention, the second oil supply channel has a serpentine-like oil through slot on the side of the first wear part 110 facing the second wear part 120, which serpentine-like oil through slot fills the surface of the first wear part 110.

It should be noted that the oil supply mode of the oil supply assembly 200 may be designed arbitrarily, for example, an automatic oil supply mode and an accurate oil supply mode may be adopted, and remote control is performed in the cab, so that the system is reliable and the operation is humanized.

The invention also provides a vehicle body structure, which comprises a feed hopper 300, a mixing drum 400 and the material sealing device; the feed inlet 310 of the feed hopper 300 extends into the material guide port 410 of the mixing drum 400 and has a gap with the inner wall of the material guide port 410, and the material sealing device is arranged in the gap.

The invention further provides a mixer truck, which comprises the truck body structure.

The body structure and the mixer truck of the present invention have the same advantages as the sealing device described above with respect to the prior art, and are not described herein again.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications may be made to the technical solution of the invention, and in order to avoid unnecessary repetition, various possible combinations of the invention will not be described further. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.