Stirring device and concrete pump truck

Abstract

The utility model belongs to the technical field of concrete pump trucks, and discloses a stirring device and a concrete pump truck. The stirring device comprises a hopper, a mounting seat, a driving part, a sealing plate and a stirring shaft. The mounting base is connected with the side wall of the hopper, and a mounting groove and a first through hole formed in the bottom of the mounting groove are formed in the end face, facing the hopper, of the mounting base; the driving piece is connected with the mounting seat; the sealing plate is arranged in the mounting groove and provided with a second through hole coinciding with the axis of the first through hole. The stirring shaft is arranged on the hopper in a penetrating mode, the end, located outside the hopper, of the stirring shaft is rotationally arranged in the first through hole and the second through hole and connected with the output end of the driving part, and a guide structure is arranged on the outer circle face, rotationally matched with the first through hole, of the stirring shaft. When the stirring shaft rotates, the guide structure can enable the lubricating grease to flow towards the sealing plate and accumulate at the end, away from the hopper, of the sealing plate to generate pressure, it is guaranteed that the sealing plate cannot deform too much, and abrasion of the sealing plate is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete pump trucks, in particular to a stirring device and a concrete pump truck. Background Art

[0002] The mixing device of a concrete pump truck utilizes a mixing shaft inserted into the hopper, so that the mixing shaft stirs the concrete in the hopper as it rotates. The mixing device includes a mounting base, a drive motor, the aforementioned hopper, and the aforementioned mixing shaft. The mixing shaft includes a driving shaft, a driven shaft, and mixing blades disposed on the driven shaft. The mounting base is connected to the hopper, and the drive motor is mounted on the mounting base. One end of the driving shaft is connected to the output end of the drive motor through the mounting base, and the other end passes through the side wall of the hopper and connects to the driven shaft disposed within the hopper. The drive motor drives the driving shaft to rotate, which in turn drives the driven shaft to rotate, causing the mixing blades to stir the concrete.

[0003] To prevent concrete from entering the hopper through the gap between the mounting base and the drive shaft, a sealing plate is installed on the end of the mounting base facing the hopper. The drive shaft passes through the sealing plate and the mounting base and is connected to the output end of the drive motor. A seal is formed between the sealing plate and the outer surface of the drive shaft to prevent concrete from entering the gap. During actual use, the sealing plate is compressed by the action of concrete, causing it to bend and deform. When the drive shaft rotates, slight deformation of the sealing plate causes increased wear, thereby shortening the service life of the sealing plate. Utility Model Content

[0004] The purpose of the utility model is to provide a mixing device and a concrete pump truck, which can improve the sealing performance and increase the service life of the sealing plate.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A stirring device comprising:

[0007] hopper;

[0008] A mounting seat connected to the hopper, wherein the end surface of the mounting seat facing the hopper is provided with a mounting groove and a first through hole provided at the bottom of the mounting groove;

[0009] a driving member connected to the mounting seat;

[0010] a sealing plate installed in the installation groove, and the sealing plate is provided with a second through hole coinciding with the axis of the first through hole;

[0011] A stirring shaft is provided on the hopper, and one end of the stirring shaft located outside the hopper is rotatably provided in the first through hole and the second through hole and is connected to the output end of the driving member. The outer cylindrical surface of the guide section of the stirring shaft that rotates with the first through hole is provided with a guide structure. The guide structure can make the lubricating grease flow toward the sealing plate when the stirring shaft rotates, and accumulate at the end of the sealing plate away from the hopper to generate pressure.

[0012] As an optional solution, the guide structure is a spiral groove, and the lubricating grease is filled in the spiral groove.

[0013] As an optional solution, when the diameter of the guide section of the stirring shaft is 100 mm-150 mm, the pitch h of the spiral groove is 10 mm-30 mm.

[0014] As an optional solution, when the diameter of the guide section of the stirring shaft is 100 mm to 150 mm, the width e of the spiral groove is 5 mm to 15 mm;

[0015] When the diameter of the guide section of the stirring shaft is 100 mm-150 mm, the depth f of the spiral groove is 2 mm-5 mm.

[0016] As an optional solution, a gap g between the outer circumferential surface of the guide section of the stirring shaft and the inner wall of the first through hole is 0.25 mm-1.5 mm.

[0017] As an optional solution, a sinking groove is provided at the bottom of the installation groove, and the sinking groove and the sealing plate form a closed space, and the lubricating grease can flow into the closed space and accumulate.

[0018] As an optional solution, the mounting seat is further provided with an injection hole connected to the first through hole, and the lubricating grease is injected through the injection hole and flows to the guide structure.

[0019] As an optional solution, the injection hole is connected to an oil pump, and the oil pump intermittently pumps the lubricating grease into the injection hole.

[0020] As an optional solution, a sealing ring is further included. The inner wall of the first through hole is provided with a mounting groove. The mounting groove is located on a side of the guide structure away from the sealing plate. The sealing ring is arranged in the mounting groove.

[0021] A concrete pump truck comprises the stirring device described in any of the above solutions.

[0022] Beneficial effects of the utility model:

[0023] The utility model provides a stirring device, wherein a guide structure is provided on the outer cylindrical surface of the guide section of the stirring shaft, and when the stirring shaft rotates, the guide structure can make the lubricating grease flow toward the sealing plate and accumulate at the end of the sealing plate away from the hopper to generate pressure, thereby offsetting the force of concrete squeezing the sealing plate, ensuring that the sealing plate will not be excessively deformed, reducing the wear of the sealing plate, and increasing the service life of the sealing plate; and the guide structure can also be combined with the sealing plate to form two seals, the sealing plate being the first seal and the guide structure being the second seal, and when the sealing plate is worn, the guide structure as the second seal can block the passage of concrete, thereby preventing the concrete from entering the driving component and affecting the service life of the driving component. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of a stirring device provided in an embodiment of the present utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the stirring device provided by the embodiment of the utility model excluding the hopper;

[0026] Figure 3 yes Figure 2 A magnified view of the structure at point A.

[0027] In the picture:

[0028] 1. Hopper;

[0029] 2. Mounting seat; 21. Enclosed space; 22. Injection hole;

[0030] 3. Driving parts;

[0031] 4. Sealing plate;

[0032] 5. Stirring shaft; 51. Driving shaft; 511. Guide structure; 52. Driven shaft; 53. Stirring blade;

[0033] 6. Sealing ring;

[0034] 7. Bearings. DETAILED DESCRIPTION

[0035] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the description of this utility model, unless otherwise expressly specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed or detachable connections, mechanical or electrical connections, direct or indirect connections through an intermediate medium, and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0037] In the description of the present utility model, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0039] like Figure 1-Figure 3 As shown, an embodiment of the present invention provides a mixing device, which includes a hopper 1, a mounting base 2, a driving member 3, a sealing plate 4 and a mixing shaft 5. The mounting base 2 is connected to the side wall of the hopper 1, and the end surface of the mounting base 2 facing the hopper 1 is provided with a mounting groove and a first through-hole provided at the bottom of the mounting groove; the driving member 3 is connected to the mounting base 2; the sealing plate 4 is provided in the mounting groove, and the sealing plate 4 is provided with a second through-hole that coincides with the axis of the first through-hole; the mixing shaft 5 is passed through the hopper 1, and one end of the mixing shaft 5 located outside the hopper 1 is rotatably provided in the first through-hole and the second through-hole and is connected to the output end of the driving member 3. The outer circumferential surface of the guide section of the mixing shaft 5 that rotatably cooperates with the first through-hole is provided with a guide structure 511. The driving member 3 can drive the mixing shaft 5 to rotate to achieve mixing of the concrete in the hopper 1.

[0040] In order to reduce the wear between the agitator shaft 5 and the mounting base 2, the first through hole is filled with lubricating grease. When the agitator shaft 5 rotates, the guide structure 511 can make the lubricating grease flow toward the sealing plate 4 and accumulate at the end of the sealing plate 4 away from the hopper 1 to generate pressure. This pressure can offset the force of the concrete in the hopper 1 squeezing the sealing plate 4 to ensure that the sealing plate 4 does not bend or deform.

[0041] Furthermore, the sealing plate 4 is the first seal. When the sealing plate 4 is worn, the concrete passes through the sealing plate 4 and enters the guide structure 511. When driving the lubricating grease to flow, the guide structure 511 can also transport the concrete entering the guide structure 511 back to the hopper 1, so that the guide structure 511 can also form a second seal.

[0042] The stirring device is provided with a guide structure 511 on the outer cylindrical surface of the guide section that rotates with the first through hole of the stirring shaft 5. When the stirring shaft 5 rotates, the guide structure 511 can make the lubricating grease flow toward the sealing plate 4 and accumulate at the end of the sealing plate 4 away from the hopper 1 to generate pressure, thereby offsetting the force of the concrete squeezing the sealing plate 4, ensuring that the sealing plate 4 does not deform too much, reducing the wear of the sealing plate 4, and increasing the service life of the sealing plate 4; and the guide structure 511 can also be combined with the sealing plate 4 to form two seals, the sealing plate 4 is the first seal, and the guide structure 511 is the second seal. When the sealing plate 4 is worn, the guide structure 511 as the second seal can block the concrete from passing through, so as to prevent the concrete from entering the driving member 3 and affecting the service life of the driving member 3.

[0043] In this embodiment, the stirring shaft 5 includes a driving shaft 51, a driven shaft 52 and a stirring blade 53. The driving shaft 51 passes through the side wall of the hopper 1. The end of the driving shaft 51 located outside the hopper 1 is rotatably arranged in the first through hole and the second through hole through the bearing 7. The bearing 7 is arranged close to the driving member 3, and the guide structure 511 is arranged on the outer cylindrical surface of the driving shaft 51. The output end of the driving member 3 is connected to the driving shaft 51; the driven shaft 52 is arranged in the hopper 1 and connected to one end of the driving shaft 51 located in the hopper 1, and the stirring blade 53 is arranged on the outer cylindrical surface of the driven shaft 52.

[0044] Specifically, if Figure 2-Figure 3 As shown, the guide structure 511 is a spiral groove provided on the outer surface of the guide section of the driving shaft 51, into which lubricating grease can be filled. This structure utilizes the principle of spiral feeding. When the driving shaft 51 rotates, the spiral groove can drive the lubricating grease provided in the spiral groove toward the sealing plate 4. The structural design is simple and easy to manufacture.

[0045] Optionally, when the diameter of the guide section of the driving shaft 51 is 100 mm to 150 mm, the pitch h of the spiral groove is 10 mm to 30 mm; the width e of the spiral groove is 5 mm to 15 mm; and the depth f of the spiral groove is 2 mm to 5 mm. This structural design ensures that the spiral groove can deliver a sufficient amount of lubricating grease to the sealing plate 4 to maintain the required pressure.

[0046] Optionally, a gap g between the outer circumference of the guide section of the driving shaft 51 and the inner wall of the first through hole is 0.25 mm to 1.5 mm. The gap g can be selected based on the diameter of the portion of the guide structure 511 provided on the driving shaft 51. This structural design ensures that the lubricating grease can flow back and circulate, preventing the lubricating grease from excessively squeezing the sealing plate 4.

[0047] To increase the accumulation surface of the lubricating grease, a sinking groove is provided at the bottom of the mounting groove. The sealing plate 4 is disposed within the mounting groove. The sealing plate 4 and the sinking groove form a closed space 21. When the driving shaft 51 rotates, the lubricating grease in the spiral groove flows toward the sealing plate 4 under the action of the spiral groove and accumulates in the closed space 21 formed by the sinking groove and the sealing plate 4, thereby exerting pressure on the sealing plate 4. By providing the sinking groove, this structure can increase the force-bearing area of ​​the sealing plate 4 and make the force on the sealing plate 4 more uniform.

[0048] In order to facilitate the injection of lubricating grease into the guide structure 511, the outer wall of the mounting seat 2 is also provided with an injection hole 22 connected to the first through hole. The injection hole 22 is arranged corresponding to the guide structure 511. The injection hole 22 is used to inject lubricating grease. The lubricating grease flows to the guide structure 511 after passing through the injection hole 22.

[0049] In order to ensure the amount of lubricating grease, the injection hole 22 is connected to an oil pump, and the oil pump intermittently pumps lubricating grease into the injection hole 22 .

[0050] In this embodiment, the mixing device is also provided with a third seal. Specifically, the mixing device also includes a sealing ring 6. The inner wall of the first through hole is provided with a mounting groove. The mounting groove is located on the side of the guide structure 511 away from the sealing plate 4. The sealing ring 6 is disposed in the mounting groove. When the sealing plate 4 is worn, the concrete passes through the sealing plate 4 and enters the guide structure 511. The guide structure 511 drives the concrete back into the hopper 1. However, if the sealing plate 4 is severely worn and fails, a large amount of concrete will pass through the sealing plate 4 and enter the guide structure 511. In this case, the guide structure 511 is insufficient to return all the concrete. The sealing ring 6 blocks the concrete passing through the guide structure 511 to ensure that the bearing 7 and the driving member 3 are not affected, thereby increasing the service life of the mixing device.

[0051] In this embodiment, the stirring device also includes a connecting assembly, and the end face of the mounting seat 2 facing the hopper 1 is also provided with a stepped groove that coincides with the axis of the mounting groove. The connecting assembly is arranged in the stepped groove to press against the sealing plate 4 and is connected to the hopper 1.

[0052] Specifically, the connecting assembly includes a pressure plate and a cover plate. The pressure plate is arranged in the stepped groove and presses against the sealing plate 4, and a flange is provided at the end of the pressure plate facing away from the stepped groove. The side wall of the hopper 1 is provided with a mounting hole. The mounting hole is sleeved on the flange and the outer surface of the side wall of the hopper 1 contacts the pressure plate. The cover plate is pressed against the inner surface of the side wall of the hopper 1. The screws can pass through the cover plate, the side wall of the hopper 1 and the pressure plate in sequence and be connected to the mounting seat 2 to realize the connection between the stirring device and the hopper 1.

[0053] Optionally, the driving member 3 is a hydraulic motor.

[0054] An embodiment of the present utility model further provides a concrete pump truck, comprising the above-mentioned stirring device.

[0055] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A stirring device, characterized in that: include: Hopper (1); A mounting seat (2) is connected to the hopper (1), and the end surface of the mounting seat (2) facing the hopper (1) is provided with a mounting groove and a first through hole provided at the bottom of the mounting groove; A driving member (3) connected to the mounting seat (2); A sealing plate (4) is installed in the installation groove, and the sealing plate (4) is provided with a second through hole that coincides with the axis of the first through hole; A stirring shaft (5) is provided on the hopper (1), and one end of the stirring shaft (5) located outside the hopper (1) is rotatably arranged in the first through hole and the second through hole and is connected to the output end of the driving member (3). The outer circular surface of the guide section of the stirring shaft (5) that is rotatably matched with the first through hole is provided with a guide structure (511). The guide structure (511) can make the lubricating grease flow toward the sealing plate (4) when the stirring shaft (5) rotates, and accumulate at the end of the sealing plate (4) away from the hopper (1) to generate pressure.

2. The stirring device according to claim 1, characterized in that The guide structure (511) is a spiral groove, and the lubricating grease is filled in the spiral groove.

3. The stirring device according to claim 2, characterized in that When the diameter of the guide section of the stirring shaft (5) is 100 mm to 150 mm, the pitch h of the spiral groove is 10 mm to 30 mm.

4. The stirring device according to claim 2, characterized in that When the diameter of the guide section of the stirring shaft (5) is 100 mm to 150 mm, the width e of the spiral groove is 5 mm to 15 mm; When the diameter of the guide section of the stirring shaft (5) is 100 mm to 150 mm, the depth f of the spiral groove is 2 mm to 5 mm.

5. The stirring device according to claim 1, characterized in that A gap g between the outer circumferential surface of the guide section of the stirring shaft (5) and the inner wall of the first through hole is 0.25 mm to 1.5 mm.

6. The stirring device according to claim 1, characterized in that A sinking groove is provided at the bottom of the installation groove, and the sinking groove and the sealing plate (4) form a closed space (21), and the lubricating grease can flow into the closed space (21) and accumulate.

7. The stirring device according to claim 1, characterized in that The mounting seat (2) is further provided with an injection hole (22) communicating with the first through hole, and the lubricating grease is injected through the injection hole (22) and flows to the guide structure (511).

8. The stirring device according to claim 7, characterized in that The injection hole (22) is communicated with an oil pump, and the oil pump intermittently pumps the lubricating grease into the injection hole (22).

9. The stirring device according to claim 1, characterized in that It also includes a sealing ring (6), the inner wall of the first through hole is provided with a mounting groove, the mounting groove is located on the side of the guide structure (511) away from the sealing plate (4), and the sealing ring (6) is arranged in the mounting groove.

10. Concrete pump truck, characterized in that: The stirring device comprises the stirring device according to any one of claims 1 to 9.

Images