Sealing device, vehicle body structure and mixer truck

Abstract

This invention discloses a sealing device, a vehicle body structure, and a mixer truck. The sealing device includes a sealing assembly (100) that is elastic and configured to provide a seal between the feed inlet (310) of the feed hopper (300) and the guide inlet (410) of the mixing drum (400). The sealing device also includes an oil supply assembly (200) configured to supply lubricating oil to the sealing assembly (100). The sealing device of this invention provides a good sealing effect between the feed hopper and the mixing drum, and also solves the problem of wear on the guide inlet.

Description

Technical Field

[0001] This invention relates to the field of concrete mixer truck technology, specifically to a sealing device, a vehicle body structure, and a concrete mixer truck. Background Technology

[0002] During the transportation of concrete mixer trucks, due to the gap between the feed hopper and the mixing drum, when the mixer truck is traveling on bumpy roads or uphill, the concrete mortar inside the mixing drum can easily overflow from the gap between the feed hopper and the mixing drum, spilling onto the road and causing pollution to the surrounding environment.

[0003] Currently, to address the issue of concrete mortar overflowing from the gap between the feed hopper and the mixing drum, the industry commonly employs two methods: the first is to add a receiving device at the tail of the discharge chute, and the second is to add a return flow device between the mixing drum and the feed hopper of the mixer truck. However, both methods have certain drawbacks: in the first method, the receiving device can only collect a limited amount of concrete, thus posing a risk of concrete overflow when the mixer truck climbs an incline; in the second method, there is a risk that prolonged material accumulation and clumping can cause the return flow device to malfunction; furthermore, when the axis of the mixing drum deflects, the gap between the guide port and the feed inlet changes, potentially leading to friction between them. Neither of these methods solves the problem of guide port wear, resulting in increased maintenance costs in the later stages. Summary of the Invention

[0004] The purpose of this invention is to overcome the problems existing in the prior art and provide a sealing device, a vehicle body structure, and a mixer truck. The sealing device can provide a good sealing effect between the feed hopper and the mixing drum, and can also solve the problem of wear on the feed inlet.

[0005] To achieve the above objectives, one aspect of the present invention provides a sealing device, the sealing device including a sealing assembly that is elastic and configured to provide a seal between the feed inlet of the feed hopper and the guide port of the mixing drum.

[0006] Optionally, the sealing device further includes an oil supply assembly configured to supply lubricating oil to the sealing assembly.

[0007] Optionally, the sealing assembly includes a first wear-resistant member configured to be mounted on the outer wall of the feed inlet or the inner wall of the feed guide to provide a seal between the feed inlet and the feed guide; the oil supply assembly is configured to provide lubricating oil between the first wear-resistant member and the outer wall of the feed inlet or between the first wear-resistant member and the inner wall of the feed guide to form a pressure oil film.

[0008] Optionally, the sealing assembly further includes a second wear-resistant member; wherein, the first wear-resistant member is configured to be installed on the outer wall of the feed inlet, the second wear-resistant member is configured to be installed on the inner wall of the material guiding inlet, and a seal is formed between the first wear-resistant member and the second wear-resistant member; the oil supply assembly is configured to be able to supply lubricating oil between the first wear-resistant member and the second wear-resistant member to form a pressure oil film.

[0009] Optionally, the sealing assembly includes an elastic member, and the elastic member is configured to be able to be disposed at the feed inlet or the material guiding inlet so that the first wear-resistant member and the second wear-resistant member are mutually extruded.

[0010] Optionally, the elastic member is disposed on the outer wall of the feed inlet, the height of the first wear-resistant member and / or the elastic member is H1, the height of the concrete liquid level in the feed inlet is H2, and H1 = k*H2, where k ranges from 1.5 to 2, and 0 < H2 ≤ 1 / 2 D, and D is the diameter of the feed inlet.

[0011] Optionally, the elastic member is disposed on the outer wall of the feed inlet, and the first wear-resistant member is disposed on the elastic member; the oil supply assembly includes a first oil supply channel and a second oil supply channel, the first oil supply channel passes through the elastic member and provides fluid communication between the second oil supply channel and the lubricating oil source, and the second oil supply channel passes through the first wear-resistant member.

[0012] Optionally, 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 one-to-one correspondence; and / or, the second oil supply channel has a meandering oil trough opening on the side of the first wear-resistant member facing the second wear-resistant member.

[0013] Through the above technical solution, the sealing assembly can provide a seal between the feed inlet of the feed hopper and the material guiding inlet of the mixing drum. However, during the transportation process, the mixing drum rotates continuously along the rotation axis. Affected by the action of the concrete and the driving bumps, the mixing drum will have varying degrees of deformation and sinking, causing its rotation axis to generate deflection, and thus no longer being coaxial with the axis of the feed inlet of the feed hopper. That is, the gap between the material guiding inlet and the feed inlet changes. Since the sealing assembly of the material sealing device of the present invention has elasticity, it can automatically compensate for the gap and always maintain the sealed state between the material guiding inlet and the feed inlet. Therefore, the material sealing device of the present invention can provide a good sealing effect between the feed hopper and the mixing drum.

[0014] A second aspect of the present invention provides a vehicle body structure, the vehicle body structure including a feeding hopper, a mixing drum, and the sealing device described above; the feeding port of the feeding hopper extends into the guiding port of the mixing drum and has a gap between it and the inner wall of the guiding port, and the sealing device is disposed in the gap.

[0015] The present invention also provides a mixer truck, which includes the above-described vehicle body structure.

[0016] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the sealing device of the present invention used in a mixer truck;

[0018] Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle;

[0019] Figure 3 This is a schematic diagram of the vehicle body structure of the present invention;

[0020] Figure 4 This is a schematic diagram of the sealing assembly of the sealing device of the present invention.

[0021] Explanation of reference numerals in the attached figures

[0022] 100 - Sealing assembly, 110 - First wear-resistant component, 120 - Second wear-resistant component, 130 - Elastic component.

[0023] 200-Fuel supply assembly,

[0024] 300 - Feed hopper, 310 - Feed inlet

[0025] 400 - Mixing drum, 410 - Feed inlet Detailed Implementation

[0026] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0027] like Figures 1 to 4 As shown, the sealing device of the present invention includes a sealing assembly 100, which is resilient and configured to provide a seal between the feed inlet 310 of the feed hopper 300 and the guide inlet 410 of the mixing tank 400.

[0028] In this invention, the sealing component 100 provides a seal between the feed inlet 310 of the feed hopper 300 and the guide inlet 410 of the mixing drum 400. However, the mixing drum 400 rotates along its axis during transportation. Due to the impact of concrete and travel bumps, the mixing drum 400 undergoes varying degrees of deformation and sinking, causing its axis of rotation to deflect. Consequently, it is no longer coaxial with the axis of the feed inlet 310 of the feed hopper 300, meaning the gap between the guide inlet 410 and the feed inlet 310 changes. Because the sealing component 100 of the sealing device of this invention is elastic, it can automatically compensate for the gap, always maintaining a sealed state between the guide inlet 410 and the feed inlet 310. Therefore, the sealing device of this invention can provide a good sealing effect between the feed hopper 300 and the mixing drum 400.

[0029] In addition, since the sealing device of the present invention also includes an oil supply component 200, which can supply lubricating oil to the sealing component 100, the lubricating oil supplied by the oil supply component 200 can form a pressure oil film in the sealing component 100. This pressure oil film can lubricate the sealing component 100 on the one hand, and prevent a large number of fine sand and gravel particles in the concrete from penetrating into the sealing component 100 and affecting the service life of the sealing component 100 on the other hand.

[0030] It should be noted that the sealing assembly 100 can be designed in various forms, as long as it can provide a seal between the feed inlet 310 and the guide inlet 410.

[0031] In one embodiment of the present invention, the sealing assembly 100 may be a separate sealing structure disposed between the inlet 310 and the guide port 410, such as a separate O-ring. In this case, the oil supply assembly 200 provides lubricating oil to the sealing assembly 100, which is actually providing lubricating oil to the O-ring. The lubricating oil provides lubrication between the O-ring and the outer wall of the inlet 310 or between the O-ring and the inner wall of the guide port 410 (depending on whether the O-ring is fixedly disposed on the inner wall of the guide port 410 or fixedly disposed on the outer wall of the inlet 310). In this case, a pressure oil film is formed between the sealing assembly 100 and the outer wall of the inlet 310 or between the sealing assembly 100 and the inner wall of the guide port 410. On the one hand, this can reduce the wear between the sealing assembly 100 and the inlet 310 or the guide port 410. On the other hand, it can also prevent a large number of fine sand and gravel particles in the concrete from entering the friction surface between the sealing assembly 100 and the inlet 310 or the guide port 410, and promptly remove the fine particles that have entered.

[0032] In another embodiment, the sealing assembly 100 includes a first wear-resistant member 110, which can be mounted on the outer wall of the feed inlet 310 or the inner wall of the guide port 410 to provide a seal between the feed inlet 310 and the guide port 410. In this case, the oil supply assembly 200 provides lubricating oil between the first wear-resistant member 110 and the outer wall of the feed inlet 310 or between the first wear-resistant member 110 and the inner wall of the guide port 410.

[0033] Furthermore, the first wear-resistant component 110 can be disposed on the outer wall of the feed inlet 310. In this case, in order to reduce the wear of the first wear-resistant component 110 on the inner wall of the guide port 410, it is understood that, in this embodiment, the sealing assembly 100 also includes a second wear-resistant component 120, which is used to be installed on the inner wall of the guide port 410, and a seal is formed between the first wear-resistant component 110 and the second wear-resistant component 120. In this embodiment, since the first wear-resistant component 110 and the second wear-resistant component 120 are respectively installed on the feed inlet 310 and the guide port 410, the first wear-resistant component 110 and the second wear-resistant component 120 can rotate relative to each other, while the second wear-resistant component 120 is fixed relative to the guide port 410. Therefore, this sealing assembly 100 can minimize the wear of the first wear-resistant component 110 on the inner wall of the guide port 410 without affecting the relative rotation of the feed inlet 310 and the guide port 410. Moreover, both the first wear-resistant component 110 and the second wear-resistant component 120 can be made of high-strength steel and self-lubricating modified polyurethane wear-resistant material, thereby avoiding the generation of a large amount of frictional heat energy during relative motion, thus ensuring the service life of the sealing component 100.

[0034] In addition, since the second wear-resistant component 120 can be fixedly installed on the inner wall of the guide port 410, when the guide port 410 rotates relative to the feed port 310, the inner wall of the guide port 410 does not directly rub against the feed port 310 or the first wear-resistant component 110, but indirectly contacts the first wear-resistant component 110 through the second wear-resistant component 120. This effectively solves the problem of the guide port 410 wearing out over a long period of time in the prior art and ensures the service life of the guide port 410.

[0035] Since the first wear-resistant component 110 and the second wear-resistant component 120 are always in surface contact, in order to further reduce the wear between the first wear-resistant component 110 and the second wear-resistant component 120, the oil supply assembly 200 is configured to provide lubricating oil between the first wear-resistant component 110 and the second wear-resistant component 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 component 110 and the second wear-resistant component 120, lubricating and cooling the friction surfaces, reducing the wear of the first wear-resistant component 110 and the second wear-resistant component 120. At the same time, the pressure oil film can also prevent a large number of fine sand and gravel particles in the concrete from entering the friction surface between the first wear-resistant component 110 and the second wear-resistant component 120, and promptly remove any fine particles that have entered, thus also improving the service life of the first wear-resistant component 110 and the second wear-resistant component 120.

[0036] Furthermore, in one embodiment of the present invention, the sealing assembly 100 further includes an elastic element 130, which is configured to be disposed at the feed inlet 310 or the guide inlet 410 to cause the first wear-resistant element 110 and the second wear-resistant element 120 to press against each other. It should be noted that the elastic element 130 may be made of a material with good elastic deformation characteristics, or utilize shape variations of irregularly shaped materials, such as O-rings, loops, springs, or combinations thereof.

[0037] It should be noted that the elastic element 130 can be arranged in various ways. For example, the elastic element 130 can be arranged to apply pressure only to the first wear-resistant element 110 so that the first wear-resistant element 110 squeezes the second wear-resistant element 120. The elastic element 130 can also be arranged to apply pressure only to the second wear-resistant element 120 so that the second wear-resistant element 120 squeezes the first wear-resistant element 110. Of course, the elastic element 130 can also be arranged to be respectively disposed on both sides of the first wear-resistant element 110 and the second wear-resistant element 120 so as to apply pressure to the first wear-resistant element 110 and the second wear-resistant element 120 towards each other at the same time.

[0038] like Figure 3As shown, in an embodiment of the present invention, the elastic member 130 is disposed on the outer wall of the feed inlet 310. The height of the first wear-resistant member 110 and / or the elastic member 130 is H1, and the height of the concrete liquid level in the feed inlet 310 is H2, where H1 = k * H2. Here, k ranges from 1.5 to 2, and 0 < H2 ≤ 1 / 2 D, where D is the diameter of the feed inlet 310. Since the relationship between the concrete liquid level in the feed inlet 310 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 is difficult to reach the height of the first wear-resistant member 110 and / or the elastic member 130. That is, the concrete will not leak out from the top of the first wear-resistant member 110 and / or the elastic member 130. The advantage of this setting is that the first wear-resistant member 110 and / or the elastic member 130 do not need to adopt a complete annular structure, but only an arc structure can meet the sealing requirements, greatly reducing the production and manufacturing costs.

[0039] It should be understood that the oil supply assembly 200 can be designed in various forms as long as it can supply lubricating oil between the first wear-resistant member 110 and the second wear-resistant member 120. For example, in an embodiment of the present invention, the elastic member 130 is disposed on the outer wall of the feed inlet 310, and the first wear-resistant member 110 is disposed on the elastic member 130; the oil supply assembly 200 includes a first oil supply channel and a second oil supply channel. The first oil supply channel passes through the elastic member 130 and provides fluid communication between the second oil supply channel and the lubricating oil source, and the second oil supply channel passes through the first wear-resistant member 110.

[0040] In order to effectively increase the oil supply amount and oil supply efficiency of the lubricating oil, in an embodiment of the present invention, the number of both the first oil supply channel and the second oil supply channel is multiple, and the multiple first oil supply channels and the multiple second oil supply channels are arranged in one-to-one correspondence.

[0041] In order to further improve the even distribution degree of the lubricating oil between the first wear-resistant member 110 and the second wear-resistant member 120, in an embodiment of the present invention, the second oil supply channel has a meandering oil passage opening on the side of the first wear-resistant member 110 facing the second wear-resistant member 120, and the meandering oil passage opening covers the surface of the first wear-resistant member 110.

[0042] It should be noted that the oil supply method of the above-mentioned oil supply assembly 200 can be designed arbitrarily. For example, it can adopt the methods of automatic oil supply and precise oil supply, and can be remotely controlled in the cab. The system is reliable and the operation is user-friendly.

[0043] The present invention also provides a vehicle body structure, which includes a feed hopper 300, a mixing drum 400, and the above-mentioned sealing device; the feed inlet 310 of the feed hopper 300 extends into the guide inlet 410 of the mixing drum 400 and has a gap with the inner wall of the guide inlet 410, and the sealing device is disposed in the gap.

[0044] The present invention also provides a mixer truck, which includes the above-described vehicle body structure.

[0045] The vehicle body structure and mixer truck of the present invention have the same advantages over the prior art as the sealing device described above, and will not be repeated here.

[0046] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A sealing device, characterized in that, It includes a sealing component (100), the sealing component (100) is elastic and configured to compensate for the gap change between the material guiding port (410) of the mixing drum (400) and the feeding port (310) of the feeding hopper (300) caused by the deflection of the rotating shaft of the mixing drum (400), so as to provide a seal between the feeding port (310) and the material guiding port (410). It further includes an oil supply component (200), the oil supply component (200) includes a first oil supply channel and a second oil supply channel, the number of both the first oil supply channel and the second oil supply channel is multiple, and is configured to be able to supply lubricating oil to the sealing component (100). The sealing component (100) includes a first wear-resistant part (110) and a second wear-resistant part (120); wherein, the first wear-resistant part (110) is configured to be installed on the outer wall of the feeding port (310) and form an arc structure surrounding the outer wall of the feeding port (310), the second wear-resistant part (120) is configured to be installed on the inner wall of the material guiding port (410), and a seal is formed between the first wear-resistant part (110) and the second wear-resistant part (120); the oil supply component (200) is configured to be able to supply lubricating oil between the first wear-resistant part (110) and the second wear-resistant part (120) to form a pressure oil film. The sealing component (100) includes an elastic part (130), the elastic part (130) is arranged on the outer wall of the feeding port (310) to make the first wear-resistant part (110) and the second wear-resistant part (120) press against each other. The height of the first wear-resistant part (110) and / or the elastic part (130) is H1, the height of the concrete liquid level in the feeding port (310) is H2, H1 = k * H2, where k ranges from 1.5 to 2, 0 < H2 ≤ 1 / 2 D, and D is the diameter of the feeding port (310).

2. The sealing device according to claim 1, characterized in that, The elastic part (130) is arranged on the outer wall of the feeding port (310), and the first wear-resistant part (110) is arranged on the elastic part (130); the first oil supply channel passes through the elastic part (130) and provides fluid connection between the second oil supply channel and the lubricating oil source, and the second oil supply channel passes through the first wear-resistant part (110).

3. The sealing device according to claim 2, characterized in that, Multiple first oil supply channels and multiple second oil supply channels are arranged in one-to-one correspondence; and / or, the second oil supply channel has a meandering oil passing notch on the side of the first wear-resistant part (110) facing the second wear-resistant part (120); and The first wear-resistant part (110) and the second wear-resistant part (120) are made of high-strength steel and / or self-lubricating modified polyurethane wear-resistant material.

4. A vehicle body structure, characterized in that, It includes a feeding hopper (300), a mixing drum (4,000) and the sealing device according to any one of claims 1-3; the feeding port (310) of the feeding hopper (300) extends into the material guiding port (410) of the mixing drum (400) and there is a gap between the feeding port (310) and the inner wall of the material guiding port (410), and the sealing device is arranged in the gap.

5. A mixer truck, characterized in that, Includes the vehicle body structure as described in claim 4.

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