Concrete mixing truck

Abstract

The utility model relates to concrete mixing and transporting equipment, aims to overcome the defects of the conventional concrete mixing and transporting vehicle with an inclined drum-type mixing drum, and provides a concrete mixing and transporting vehicle which is characterized in that a mixing tank comprises a three-section tank body with an arc-shaped bottom section and a mixer arranged in the tank body; the tank body is fixed on the frame and consists of a main body cylinder, a front conical cylinder and a rear conical cylinder, and a feeding port and a discharging port are formed in the rear end of the rear conical cylinder; the stirrer comprises a front stirring shaft, a middle stirring shaft and a rear stirring shaft which are connected in sequence and are correspondingly and rotatably mounted in the cylinders, and spiral stirring blades matched with the bottom wall surfaces of the corresponding cylinders are mounted on the stirring shafts; the front end of the front stirring shaft is positioned at a front end plate of the front conical cylinder and is in transmission connection with the stirring driving device; the spiral stirring blades can axially convey concrete; and the rear end of the rear stirring shaft is positioned at the discharge hole. According to the concrete mixing truck, the horizontal tank body fixed relative to the frame is adopted, and the stirrer is arranged in the tank body, so that the stability of the truck is improved, and the rollover condition of the truck is reduced.

Description

Technical Field

[0001] The utility model relates to concrete mixing and transporting equipment, and more specifically to a concrete mixing and transporting vehicle. Background Art

[0002] In existing concrete mixer trucks, the mixing drum is usually rotatably mounted on the chassis frame, and the hydraulic motor drives the mixing drum to rotate through a reducer. The blades welded to the inner wall of the mixing drum are used to continuously introduce concrete and forcefully mix it so that it does not solidify within a certain period of time. When the mixing drum is reversed, the concrete is pushed out by the blades.

[0003] The existing concrete mixer trucks are mostly loaded with concrete, and the mixing drum is usually an inclined structure, with the height of the rear end higher than the height of the front. This structure improves the loading rate of the mixing drum, saves manufacturing costs and transportation space, and brings economic benefits. The concrete mixer truck with this structure has a high center of gravity, and the transport medium is a semi-fluid liquid, which brings great hidden dangers to the stability and operational stability of the vehicle, and accidents often occur. Utility Model Content

[0004] The utility model aims to solve the technical problem of the shortcomings of the existing concrete mixer truck with an inclined drum type mixing drum, and provides a concrete mixer truck.

[0005] The utility model provides a technical solution to achieve its purpose: a concrete mixer truck, comprising a vehicle chassis and a mixing tank, wherein the mixing tank comprises a three-section tank body with an arc-shaped bottom cross section and a stirrer installed in the tank body; the tank body is fixed on the frame of the vehicle chassis, and comprises a main body cylinder, a front cone cylinder and a rear cone cylinder respectively connected to the front and rear ends of the main body cylinder and with the bottom wall extending obliquely upward, wherein a feeding port and a discharging port are arranged at the rear end of the rear cone cylinder; the stirrer comprises the front cone cylinder, the main body cylinder and the stirrer cylinder which are sequentially connected and correspondingly rotatably installed The front stirring shaft, the middle stirring shaft and the rear stirring shaft in the rear cone are each equipped with a spiral stirring blade that matches the corresponding bottom wall of the cylinder; the front end of the front stirring shaft is located at the front end plate of the front cone and is transmission-connected to the stirring drive device arranged in front of the front cone, and both ends of the middle stirring shaft are lower than the height of the front end of the front stirring shaft and the rear end of the rear stirring shaft; the spiral stirring blades are configured to match the bottom wall of the tank body and can transport concrete along the axial direction of each stirring shaft; the rear end of the rear stirring shaft is located at the discharge port.

[0006] In the concrete mixer truck of the utility model, the spiral stirring blade on one or more of the front stirring shaft, the middle stirring shaft and the rear stirring shaft is composed of a plurality of stirring blade sections, each stirring blade section comprises a paddle blade and a telescopic blade handle that can be extended and retracted, a fixed blade handle in the telescopic blade handle is fixedly connected to the rear stirring shaft, the paddle blade is fixed to a sliding blade handle in the telescopic blade handle that is telescopic relative to the fixed blade handle, and the paddle blades of two adjacent stirring blade sections are adjacent at the ends.

[0007] In the concrete mixer transport truck of the utility model, the spiral stirring blades on the front stirring shaft, the middle stirring shaft and the rear stirring shaft are adjacent to each other at the end portions.

[0008] In the concrete mixer truck of the utility model, the feeding port is arranged at the top of the rear end of the rear cone, and a feeding port cover plate for closing and opening the feeding port is arranged at the feeding port.

[0009] In the concrete mixer transport truck of the utility model, the discharge port is arranged at the lower part of the rear end plate of the rear cone.

[0010] In the concrete mixer transport truck of the utility model, a discharge port sealing plate for closing and opening the discharge port is arranged at the discharge port.

[0011] In the concrete mixer truck of the utility model, the upper part of the discharge port sealing plate is rotatably connected with the rear end plate through a pin shaft, and a cylinder for pushing the discharge port sealing plate to open and close is arranged on the upper side of the discharge port sealing plate, and the two ends of the cylinder are respectively connected with the rear end plate and the discharge port sealing plate.

[0012] In the utility model concrete mixer transport truck, a discharge guide plate is arranged at the discharge port at the rear end of the rear cone.

[0013] In the concrete mixer transport truck of the utility model, the tops of the front cone, the main body and the rear cone are flush.

[0014] In the concrete mixer truck of the utility model, the concrete mixer truck also includes a water tank and a water pump which are installed on the vehicle chassis and located in front of the tank body, and the water pump is connected with the water tank and the top of the tank body through a pipeline.

[0015] Compared with the prior art, the concrete mixer transport truck of the utility model adopts a horizontal tank body fixed relative to the vehicle frame, and a stirrer is arranged in the tank body, so the stability of the transport truck is greatly improved and the rollover of the vehicle is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a result schematic diagram of the concrete mixer truck of the utility model.

[0017] Figure 2 The utility model is a schematic diagram of the internal structure of the tank body of the concrete mixer truck.

[0018] Figure 3 The utility model is a schematic diagram of the arrangement of the stirring shaft in the tank of the concrete mixer truck.

[0019] Figure 4 The utility model is a schematic diagram of the arrangement of stirring blades in the tank of a concrete mixer truck.

[0020] Parts names and serial numbers in the figure:

[0021] Vehicle head 1, frame 2, wheel 3, water tank 4, reduction motor 5, water pump 6, hose 7, support seat 8, mixing tank 9, support frame 10, discharge port 11, pipeline 12, feeding port 13, support 14, cylinder 15, discharge port sealing plate 16, stirring shaft 17, spiral stirring blade 18, bearing 19, protective cover 20, discharge guide plate 21, feeding port cover plate 22, main body tube 901, front cone tube 902, rear cone tube 903, front end plate 904, telescopic petiole 1801, paddle 1802, front stirring shaft 1702, middle stirring shaft 1701, rear stirring shaft 1703. DETAILED DESCRIPTION

[0022] The specific implementation scheme is described below with reference to the accompanying drawings.

[0023] like Figure 1 As shown, the concrete mixer truck includes a vehicle chassis and a mixing tank, and the mixing tank includes a three-section tank body with an arc-shaped bottom cross-section and an agitator installed in the tank body. The tank body is fixed on the frame 2 of the vehicle chassis, and is composed of a main body cylinder 901, a front cone cylinder 902 and a rear cone cylinder 903 respectively connected to the front and rear ends of the main body cylinder 901 and with the bottom wall extending obliquely upward, and a feeding port 13 and a discharging port 11 are arranged at the rear end of the rear cone cylinder 903; the agitator includes a front agitator shaft 1702, a middle agitator shaft 1701 and a rear agitator shaft 1703 which are sequentially connected and correspondingly rotatably installed in the front cone cylinder 902, the main body cylinder 901 and the rear cone cylinder 903, and each agitator shaft is installed with A spiral stirring blade 18 cooperates with the corresponding bottom wall of the cylinder; the front end of the front stirring shaft 1702 is located at the front end plate 904 of the front cone 902 and is transmission-connected to the stirring drive device arranged in front of the front cone 902, and both ends of the middle stirring shaft 1701 are lower than the height of the front end of the front stirring shaft 1702 and the rear end of the rear stirring shaft 1703; the spiral stirring blade 18 is configured to be able to transport concrete along the axial direction of each stirring shaft 17; the rear end of the rear stirring shaft 1703 is located at the discharge port 11.

[0024] The automobile chassis includes a front part 1 and a frame 2, the rear end of the front part 1 is connected to the front end of the frame 2, a plurality of wheels 3 are symmetrically arranged on both sides of the lower part of the front part 1 and the lower part of the frame 2, a water tank 4 is installed above the frame 2 and near the position of the front part 1 through a support frame 10, a reduction motor 5 and a water pump 6 are also arranged above the frame 2 near the position of the front part 1, a protective cover 20 is arranged on the frame 2, the reduction motor 5 and the water pump 6 are arranged in the protective cover 20, and the water inlet end of the water pump 6 is connected to the water tank 4 through a hose 7.

[0025] In this embodiment, the reduction motor 5 constitutes a stirring driving device for driving the stirrer to rotate. In some other embodiments, the stirring driving device can also be composed of a hydraulic motor, or a combination of a hydraulic motor and a reduction gear, or an engine and a reduction gear.

[0026] A plurality of support seats 8 are provided on the frame 2 , the mixing tank is fixed on the support seats 8 , and the water outlet end of the water pump 6 is connected to the top of the mixing tank 9 through a pipeline 12 .

[0027] like Figure 4 As shown, the tank body of the mixing tank 9 is composed of three sections of cylinders, the middle section of which is the main cylinder 901, and the front and rear sections are corresponding to the front cone cylinder 902 and the rear cone cylinder 903. The three sections of the cylinder are all arranged horizontally, and the front cone cylinder 902 and the rear cone cylinder 903 are correspondingly connected to the front and rear ends of the main cylinder 901. The front end of the front cone cylinder 902 is provided with a front end plate 904, and the rear end of the rear cone cylinder 903 is provided with a rear end plate, thereby forming a space for accommodating and mixing concrete.

[0028] The front cone 902 and the rear cone 903 are roughly conical in shape, the tops of the front cone 902, the main body 901 and the rear cone 903 are flush, and the bottom wall extends obliquely upward, that is, the bottom wall of the front cone 902 extends obliquely forward and upward, and the bottom wall of the rear cone 903 extends obliquely backward and upward. The cross-section of the bottom of the main body 901, the front cone 902 and the rear cone 903 is an arc shape.

[0029] The stirring shaft 17 of the agitator is installed in the tank body. The stirring shaft 17 consists of three sections, namely the front stirring shaft 1702, the middle stirring shaft 1701 and the rear stirring shaft 1703. The three stirring shafts are connected in sequence through a universal joint 1704. The front stirring shaft 1702 is installed in the front cone 902 through a bearing 19, the rear stirring shaft 1703 is installed in the rear cone 903 through a bearing, and the middle stirring shaft 1701 is installed in the main body 901 through a bearing.

[0030] Both ends of the middle stirring shaft 1701 are lower than the height of the front end of the front stirring shaft 1702 and the rear end of the rear stirring shaft 1703, and the rear end of the rear stirring shaft 1703 is located at the discharge port 11; so that the stirring shaft 17 has basically the same direction as the bottom of the tank body. Each section of the stirring shaft is provided with a spiral stirring blade 18, and each spiral stirring blade 18 can cooperate with the bottom of the cylinder wall at the corresponding position, so that the spiral stirring blade 18 is driven by each stirring shaft 17 to rotate and transport concrete along the axial direction of each stirring shaft 17. When the stirring shaft 17 rotates in the forward direction, the spiral stirring blades 18 on the rear stirring shaft 1703, the middle stirring shaft 1701, and the front stirring shaft 1702 stir the concrete in the tank body from back to front and relay in turn along the axial direction of the stirring shaft 17 to the front of the tank body. The concrete transported to the front of the tank body rolls backward on the upper layer of the concrete due to the effect of extrusion and gravity, thereby achieving the effect of stirring the concrete in the tank body. When the stirring shaft 17 rotates in the opposite direction, the spiral stirring blades 18 on the front stirring shaft 1702, the middle stirring shaft 1701 and the rear stirring shaft 1703 stir the concrete in the tank body and convey it to the rear of the tank body from front to back in the axial direction of the stirring shaft 17. Part of the concrete conveyed to the rear of the tank body flows out from the discharge port 11, and part of it flows back to the middle of the tank body under the action of gravity, and is then pushed backward by the spiral stirring blades 18 on the rear stirring shaft 1703. This cycle repeats until all the concrete in the tank body is finally discharged from the discharge port.

[0031] In this embodiment, the spiral stirring blades 18 on each stirring shaft 17 are composed of multiple stirring blades, such as Figure 4 As shown, each stirring blade includes a paddle blade 1802 and a retractable petiole 1801, the fixed petiole in the retractable petiole 1801 is fixedly connected to the stirring shaft 17, the paddle blade 1802 is fixed on a sliding petiole in the retractable petiole 1801 that is retractable relative to the fixed petiole, and the paddle blades 1802 of two adjacent stirring blades are adjacent at the ends.

[0032] The front cone 902, the main body 901 and the rear cone 903 are not regular conical or cylindrical, and the cross section of the bottom is arc-shaped, and the cylinder wall extends upward from both sides of the bottom, and the bending radius of the cylinder wall gradually increases. When it reaches the upper part of the cylinder, its wall surface may no longer be arc-shaped, and may even be flat. Or the stirring shaft is located below the center of gravity of each cylinder, and the distance between the stirring shaft and the cylinder wall gradually increases from bottom to top. In the present invention, the spiral stirring blade 18 on the stirring shaft 17 is composed of multiple sections, and each section of the spiral stirring blade 18 changes its radius through its retractable retractable petiole. When the spiral stirring blade 18 rotates under the drive of the stirring shaft 17, within the telescopic range of each stirring blade, the radial edge of the blade of each section of the stirring blade can abut against the cylinder wall, so that the cylinder wall can better cooperate with the spiral stirring blade 18, reduce the influence of the poor compatibility of the irregular arc-shaped cylinder wall and the spiral stirring blade 18, and improve the efficiency of the spiral stirring blade in conveying concrete.

[0033] In this embodiment, the spiral stirring blades 18 on any section of the stirring shaft among the front stirring shaft 1702, the middle stirring shaft 1701 and the rear stirring shaft 1703 can be configured to consist of multiple sections of stirring blades, and each section of the stirring blade has a telescopic petiole.

[0034] like Figure 1 Figure 2 As shown, the feeding port 13 is arranged at the top of the rear end of the rear cone 903, and a feeding port cover plate 22 for closing and opening the feeding port is arranged at the feeding port 13. Closing the feeding port cover plate 22 after feeding concrete into the tank body can prevent debris from entering the tank body.

[0035] like Figure 1 Figure 2 As shown, the discharge port 11 is arranged at the lower part of the rear end plate of the rear cone 903. A discharge port sealing plate 16 for closing and opening the discharge port 11 is arranged at the discharge port 11. The upper part of the discharge port sealing plate 16 is rotatably connected with the rear end plate through a pin shaft, and a cylinder 15 for pushing the discharge port sealing plate 16 to open and close is arranged on the upper side of the discharge port sealing plate 16. Supports 14 are provided on the rear end plate and the discharge port sealing plate, and the two ends of the cylinder 15 are respectively connected to the supports 14 on the rear end plate and the discharge port sealing plate 16. The extension and contraction of the cylinder 15 causes the discharge port sealing plate 16 to rotate around the upper pin shaft, so that the discharge port sealing plate 16 opens or closes the discharge port.

[0036] A discharge guide plate 21 is provided at the discharge port 11 at the rear end of the rear cone 903 to facilitate the concrete receiving equipment to receive concrete when the concrete mixer truck is unloading.

[0037] In this embodiment, the tank body of the mixing tank is arranged in a horizontal support, and the tank body is fixed relative to the frame, which greatly improves the overall stability and greatly reduces the possibility of vehicle rollover. The three-stage tank body is equipped with a three-stage agitator for cooperation. The outer edge of the stirring blade is adaptively fitted with the inner wall of the tank body, and the material on the inner wall can be scraped off, thereby ensuring complete discharge without causing material waste. When cleaning, no residual concrete will be left on the inner wall of the mixing drum. The retractable stirring blade can not only scrape the material on the inner wall of the mixing drum, but also adapt to the radial dimensions of various parts of the mixing tank to achieve contraction and ensure the normal rotation of the agitator.

Claims

1. A concrete mixer truck, comprising a chassis and a mixing tank, characterized in that: The mixing tank comprises a three-section tank body with an arc-shaped bottom cross-section and an agitator installed in the tank body; the tank body is fixed on the frame of the automobile chassis, and is composed of a main body cylinder, a front cone cylinder and a rear cone cylinder respectively connected to the front and rear ends of the main body cylinder and with the bottom wall extending obliquely upward, and a feeding port and a discharging port are arranged at the rear end of the rear cone cylinder; the agitator comprises a front stirring shaft, a middle stirring shaft and a rear stirring shaft which are sequentially connected and correspondingly rotatably installed in the front cone cylinder, the main body cylinder and the rear cone cylinder, and each stirring shaft is equipped with a spiral stirring blade matched with the corresponding bottom wall of the cylinder; the front end of the front stirring shaft is located at the front end plate of the front cone cylinder and is transmission-connected with the stirring drive device arranged in front of the front cone cylinder, and both ends of the middle stirring shaft are lower than the height of the front end of the front stirring shaft and the rear end of the rear stirring shaft; the spiral stirring blade is configured to cooperate with the bottom cylinder wall of the tank body and can convey concrete along the axial direction of each stirring shaft; the rear end of the rear stirring shaft is located at the discharging port.

2. The concrete mixer truck according to claim 1, characterized in that: The spiral stirring blades on one or more of the front stirring shaft, the middle stirring shaft and the rear stirring shaft are composed of multiple stirring blades, each stirring blade includes a paddle blade and a retractable telescopic petiole, the fixed petiole in the retractable petiole is fixedly connected to the rear stirring shaft, the paddle blade is fixed on a sliding petiole in the retractable petiole that is retractable relative to the fixed petiole, and the paddle blades of two adjacent stirring blades are adjacent at the ends.

3. The concrete mixer truck according to claim 1, characterized in that: The spiral stirring blades on the front stirring shaft, the middle stirring shaft and the rear stirring shaft are adjacent to each other at the ends.

4. The concrete mixer truck according to claim 1, characterized in that: The feeding port is arranged at the top of the rear end of the rear cone, and a feeding port cover plate for closing and opening the feeding port is arranged at the feeding port.

5. The concrete mixer truck according to claim 1, characterized in that: The discharge port is arranged at the lower part of the rear end plate of the rear cone.

6. The concrete mixer truck according to claim 5, characterized in that: A discharge port sealing plate for closing and opening the discharge port is arranged at the discharge port.

7. The concrete mixer truck according to claim 6, characterized in that: The upper part of the discharge port sealing plate is rotatably connected to the rear end plate through a pin shaft, and a cylinder for pushing the discharge port sealing plate to open and close is arranged on the upper side of the discharge port sealing plate, and the two ends of the cylinder are respectively connected to the rear end plate and the discharge port sealing plate.

8. The concrete mixer truck according to claim 6 or 7, characterized in that: A discharge guide plate is arranged at the discharge port at the rear end of the rear cone.

9. The concrete mixer truck according to claim 1, characterized in that: The tops of the front cone, the main body and the rear cone are flush.

10. The concrete mixer truck according to claim 1, characterized in that: The concrete mixer truck also includes a water tank and a water pump which are installed on the vehicle chassis and located in front of the tank body. The water pump is connected to the water tank and the top of the tank body through a pipeline.

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