A concrete mixer truck with variable cylinder inclination angle and an inclination angle transformation method

Abstract

The present invention discloses a variable-barrel-inclination concrete mixer truck and an inclination transformation method, belonging to the field of concrete mixer trucks. A rotating seat is installed on the vehicle frame, and the front drive system is rotatably connected to the rotating seat. A groove is formed on the vehicle frame, and the groove is located below the mixing barrel. The groove is adapted for the mixing barrel to descend. Transverse moving plates are installed on both sides of the groove, and the transverse moving plates are fixedly connected to the feeding and discharging system; the rear support system includes a supporting wheel, and a ring-shaped raceway corresponding to the supporting wheel is installed on the mixing barrel. The supporting wheel rolls in the ring-shaped raceway, and the supporting wheel is adapted to roll along the ring-shaped raceway and support the mixing barrel; the rear support system includes a lifting member and a steering member. The top surface of the lifting member has the same arc surface as the corresponding position of the mixing barrel. The lifting member is adapted to lift the mixing barrel. The steering member is fixedly connected to the bottom of the supporting wheel, and the steering member is adapted to turn the supporting wheel and move along the surface of the mixing barrel; the present invention solves the problem that the height of the mixing barrel cannot be changed and it cannot adapt to construction sections with limited height, etc.

Description

Technical Field

[0001] The present invention belongs to the field of concrete mixer trucks, and particularly relates to a concrete mixing and transporting truck with a variable barrel inclination angle and an inclination angle transformation method. Background Art

[0002] A concrete mixing and transporting truck consists of a special-purpose vehicle chassis, a mixing drum, a mixing drum drive system, a water system, a feeding and discharging system, a frame support system, and other devices such as protection. The mixing drum lies horizontally on the mixing frame at a certain inclination angle. The front part is supported by a speed reducer and driven to rotate, and the rear part is supported by two idler wheels for the rolling track of the mixing drum. The rolling track of the mixing drum contacts the rollers of the idler wheel device to form a rolling support. The concrete mixing and transporting truck drives the speed reducer through a hydraulic system to control the forward or reverse rotation of the mixing drum to achieve the purpose of mixing or loading and unloading concrete.

[0003] A concrete mixing and transporting truck is an important special-purpose vehicle in modern engineering construction, shuttling between a concrete mixing plant and a construction site. The road conditions encountered when transporting commercial concrete to different construction projects are also different. Sometimes, there will be narrow or height-restricted roads, such as alleys in densely populated areas, inside factory buildings, and inside highway tunnels, where large vehicles are not easy to pass through. These roads have height restrictions on passing vehicles. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to solve the problem that the height of the mixing drum cannot be changed and it cannot adapt to construction sections with height restrictions.

[0005] To solve the above technical problem, the inventor obtained the technical solution of the present invention through practice and summary. The present invention discloses a concrete mixing and transporting truck with a variable barrel inclination angle, including a frame. A front drive system, a mixing drum, a rear support system, and a feeding and discharging system are respectively installed on the frame. The front drive system is connected to the front end of the mixing drum, and the front drive system is adapted to drive the mixing drum to rotate. The mixing drum is inclined, the rear support system is adapted to support the rear end of the mixing drum, and the feeding and discharging system is connected to the opening of the mixing drum;

[0006] A rotating seat is installed on the frame. The front drive system is rotatably connected to the rotating seat. A groove is formed on the frame, and the groove is located below the mixing drum. The groove is adapted for the mixing drum to descend. Transverse moving plates are installed on both sides of the groove, and the transverse moving plates are respectively fixedly connected to the feeding and discharging system and the rear support system. The transverse moving plates are adapted to move the rear support system;

[0007] The rear support system includes idler wheels. A ring-shaped rolling track corresponding to the idler wheels is installed on the mixing drum. The idler wheels roll in the ring-shaped rolling track, and the idler wheels are adapted to roll along the ring-shaped rolling track and support the mixing drum;

[0008] The rear support system further includes a lifting member and a steering member. The top surface of the lifting member has the same arc surface as the corresponding position of the mixing drum. The lifting member is adapted to lift the mixing drum. The steering member is fixedly connected to the bottom of the supporting wheel, and the steering member is adapted to steer the supporting wheel.

[0009] Preferably, the rear support system includes a fixed housing. The fixed housing is provided with multiple layers. A first motor is installed in the fixed housing, and the first motor is fixedly connected to the inner wall of the fixed housing.

[0010] The fixed housing includes a first cavity. The lifting member is located in the first cavity. A first through hole is formed in the first cavity, and the first through hole is adapted for the lifting member to output expansion and contraction.

[0011] The lifting member is connected to the first motor, and the first motor is adapted to move the lifting member up and down along the first cavity.

[0012] Preferably, a first bevel gear is installed at the output end of the first motor. A bearing seat is installed in the fixed housing, and the bearing seat is fixedly connected to the fixed housing. A horizontal shaft is installed on the bearing seat, and the horizontal shaft is fixedly connected to the bearing seat. A second bevel gear is installed at one end of the horizontal shaft, and the second bevel gear meshes with the first bevel gear.

[0013] A connection port is formed on one side of the bottom of the lifting member opposite to the first motor. The other end of the horizontal shaft is located in the connection port, and a gear is installed at the other end of the horizontal shaft. A rack is arranged in the lifting member, and the rack meshes with the gear.

[0014] Preferably, the lifting member includes a columnar shell, a straight rod, and an arc-shaped member. The rack is installed in the columnar shell, and the columnar shell is fixedly connected to the rack. The size of the columnar shell is smaller than the size of the first cavity.

[0015] The arc-shaped member has the same arc surface as the corresponding surface of the mixing drum. One end of the straight rod is fixedly connected to the arc-shaped member, and the other end of the straight rod is fixedly connected to the surface of the columnar shell.

[0016] Preferably, the rear support system includes a fixed housing. The fixed housing is provided with multiple layers. The fixed housing includes a first cavity. The lifting member is located in the first cavity. A first through hole is formed in the first cavity, and the first through hole is adapted for the lifting member to expand and contract.

[0017] The lifting member includes an electric hydraulic push rod, which is installed in the first cavity. A rigid coupling is installed at the output end of the electric hydraulic push rod. One end of the rigid coupling is fixedly connected to the electric hydraulic push rod, and the other end of the rigid coupling is installed with a coupling shaft. The coupling shaft is fixedly connected to the rigid coupling. A straight rod is installed at the end of the coupling shaft away from the electric hydraulic push rod. The coupling shaft is fixedly connected to the straight rod. An arc-shaped member is installed at the end of the straight rod away from the coupling shaft. The arc-shaped member is fixedly connected to the coupling shaft;

[0018] A first independent oil tank is arranged on one side of the electric hydraulic push rod, and the electric hydraulic push rod is connected to the first independent oil tank.

[0019] Preferably, the steering member includes a second motor and a grooved pulley mechanism. A driving dial is installed at the output end of the second motor, and the driving dial is fixedly connected to the second motor;

[0020] The supporting wheel is installed on the bracket, and the supporting wheel is fixedly connected to the bracket. The bracket is installed on the rotary disk, and the bracket is fixedly connected to the rotary disk. A rotary bearing is installed at the edge of the rotary disk. A second through hole is provided on the fixed shell, and the rotary bearing is installed in the second through hole. A rotating shaft is installed in the rotary bearing. A driven grooved pulley is installed at the bottom end of the rotating shaft, and the driving dial is adapted to the driven grooved pulley.

[0021] Preferably, the height at which the lifting member jacks up the mixing drum is greater than the thickness of the supporting wheel, and the second motor is a stepping motor.

[0022] Preferably, the annular raceway includes a first raceway and a second raceway. The first raceway and the second raceway are respectively arranged at both ends of the annular raceway, and both the first raceway and the second raceway are adapted to the supporting wheel;

[0023] Rollers are arranged inside the arc-shaped member. There are multiple groups of rollers, and the rollers are adapted for the arc-shaped member to move along the surface of the mixing drum.

[0024] Preferably, the transverse moving plate includes a hydraulic telescopic rod and a transverse plate. The oil inlet and outlet of the hydraulic telescopic rod are respectively connected to a second independent oil tank. The hydraulic telescopic rod is adapted to push the transverse plate to move horizontally. The stroke of the hydraulic telescopic rod is adapted for the supporting wheel to roll from the first raceway to the second raceway, and the transverse plate is adapted to drive the feeding and discharging system to move horizontally.

[0025] An inclination transformation method for a concrete mixer truck with a variable barrel inclination angle includes the following steps:

[0026] Step 1. When the concrete mixer truck is operating and it is necessary to adjust the height of the mixing drum, first pull over to the side of the road and stop the mixing drum from rotating. Open according to the type of lifting member actually installed:

[0027] S1: For the lifting member connected by the gear-rack method, first turn on the first motor. The first motor drives the horizontal shaft to the gear in sequence, and the gear drives the rack to drive the straight rod to move upward. The arc-shaped member rises to fit the mixing drum, and multiple arc-shaped members lift the mixing drum;

[0028] S2: Energize the left electromagnet of the three-position four-way solenoid valve and turn it to the left end, so that the oil circuit turns and is connected. The output end of the electro-hydraulic push rod drives the arc-shaped member to lift upward. When the stroke is completed, turn the three-position four-way solenoid valve to the middle position to keep the mixing drum lifted;

[0029] Step 2: Turn on the second motor. After the second motor drives the sheave mechanism to rotate once, turn it off, so that the supporting wheel rotates 90°;

[0030] Step 3: Drive the transverse moving plate to connect the oil circuit of the hydraulic telescopic rod. The hydraulic telescopic rod pushes the transverse plate to move horizontally in the tangential direction of the moving direction of the supporting wheel, and the supporting wheel moves from the first raceway to the second raceway;

[0031] Step 4: Repeat the operation steps of Step 2 again. Turn on the second motor. After the second motor drives the sheave mechanism to rotate once, turn it off, so that the supporting wheel rotates 90°;

[0032] Step 5: Open according to the type of lifting member actually installed:

[0033] S1: For the lifting member connected by the gear-rack method, turn on the first motor in the reverse direction. The first motor drives the horizontal shaft to the gear in sequence, and the gear drives the rack to drive the straight rod to move downward. The arc-shaped member descends until the columnar shell returns to the first cavity, and the supporting wheel rolls circumferentially along the second raceway again;

[0034] S2: When using the lifting member connected by the electro-hydraulic push rod, energize the right electromagnet of the three-position four-way solenoid valve and turn it to the right end, so that the oil circuit turns and is connected. The output end of the electro-hydraulic push rod drives the arc-shaped member to retract downward. When the stroke is completed, turn the three-position four-way solenoid valve to the middle position;

[0035] Step 6: Complete a single height adjustment. The supporting wheel rotates on the mixing drum along the second raceway again, and the concrete transport vehicle continues to move on the road.

[0036] Compared with the prior art, the present invention can obtain the following technical effects:

[0037] In view of the fact that the mixer truck cannot adjust the height of the mixing drum under road conditions such as height limits, the present invention provides that one end of the mixing drum is a rotating seat that can rotate. A groove is provided in the lower part of the mixing drum so that it can rotate downward. A transverse moving plate is provided to enable the supporting wheels to move, and a steering member is provided to enable the supporting wheels to rotate. In this way, the height of the mixing drum can be lowered, and it can be ensured that the supporting wheels roll along the second raceway. When the mixing drum contains concrete, the quality of the concrete can be guaranteed.

[0038] Secondly, the way of using a gear-rack or an electric hydraulic push rod is adopted to push the arc-shaped member for supporting the mixing drum. Then, the supporting wheels are rotated 90°. The transverse moving plate is moved, and the supporting wheels are moved from the first raceway to the second raceway and then rotated 90° to complete the lowering of the height of the mixing drum. The structure of the present invention is reasonable and the method is appropriate. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0040] Figure 1 It is a side view of the concrete mixer truck of the present invention;

[0041] Figure 2 It is of the present invention Figure 1 Partial enlarged view A;

[0042] Figure 3 It is a partial cross-sectional view of the present invention along the horizontal center line of the vehicle frame;

[0043] Figure 4 It is an internal schematic view of the rear support system of Embodiment 1 of the present invention;

[0044] Figure 5 It is a cross-sectional view of the rear support system of Embodiment 1 of the present invention along the axial direction of the gear (from the second raceway to the first raceway in the direction of the supporting wheel fitting the surface of the mixing drum).

[0045] Figure 6 It is a cross-sectional view of the rear support system of Embodiment 1 of the present invention along the center of the supporting wheel (from the first raceway to the second raceway in the direction of the supporting wheel fitting the surface of the mixing drum).

[0046] Figure 7 It is a flowchart of the inclination transformation method of the present invention.

[0047] Figure 8 It is a cross-sectional view of the rear support system of Embodiment 2 of the present invention along the axial direction of the gear (from the second raceway to the first raceway in the direction of the supporting wheel fitting the surface of the mixing drum).

[0048] Figure 9 It is a schematic diagram of the fitting position between the supporting wheel and the mixing drum of the present invention.

[0049] Figure 10 It is a hydraulic schematic diagram of the installation of the electro-hydraulic push rod in Embodiment 2 of the present invention.

[0050] In the figure: 1, vehicle frame; 2, front drive system; 3, mixing drum; 4, feeding and discharging system; 5, rotating seat; 6, groove; 7, transverse moving plate; 8, supporting wheel; 9, annular raceway; 10, lifting member; 11, steering member; 12, fixed housing; 13, first motor; 14, first cavity; 15, first bevel gear; 16, bearing seat; 17, horizontal shaft; 18, second bevel gear; 19, connection port; 20, gear; 21, rack; 22, cylindrical housing; 23, straight rod; 24, arc-shaped member; 25, electro-hydraulic push rod; 26, rigid coupling; 27, coupling shaft; 28, first independent oil tank; 29, second motor; 30, driving dial; 31, bracket; 32, rotary disk; 33, slewing bearing; 34, rotating shaft; 35, driven sheave; 36, first raceway; 37, second raceway; 38, hydraulic telescopic rod; 39, transverse plate; 40, second independent oil tank. Detailed implementation manners

[0051] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0052] The application principle of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0053] Embodiment 1

[0054] As Figures 1 to 7 shown, it is an implementation manner of the present invention. A concrete mixer truck with a variable cylinder inclination angle includes a vehicle frame 1. A front drive system 2, a mixing drum 3, a rear support system and a feeding and discharging system 4 are respectively installed on the vehicle frame 1. The front drive system 2 is connected to the front end of the mixing drum 3. The front drive system 2 is adapted to drive the mixing drum 3 to rotate. The mixing drum 3 is inclined. The rear support system is adapted to support the rear end of the mixing drum 3. The feeding and discharging system 4 is connected to the opening of the mixing drum 3;

[0055] A rotating seat 5 is installed on the vehicle frame 1. The front drive system 2 is rotatably connected to the rotating seat 5. A groove 6 is formed on the vehicle frame 1. The groove 6 is located below the mixing drum 3. The groove 6 is adapted for the mixing drum 3 to descend. Transverse moving plates 7 are installed on both sides of the groove 6. The transverse moving plates 7 are respectively fixedly connected to the feeding and discharging system 4 and the rear support system. The transverse moving plates 7 are adapted to move the rear support system;

[0056] The rear support system includes a supporting wheel 8. An annular raceway 9 corresponding to the supporting wheel 8 is installed on the mixing drum 3. The supporting wheel 8 rolls within the annular raceway 9, and the supporting wheel 8 is adapted to roll along the annular raceway 9 and support the mixing drum 3;

[0057] The rear support system further includes a lifting member 10 and a steering member 11. The top surface of the lifting member 10 has the same arc surface as the corresponding position of the mixing drum 3. The lifting member 10 is adapted to lift the mixing drum 3. The steering member 11 is fixedly connected to the bottom of the supporting wheel 8, and the steering member 11 is adapted to steer the supporting wheel 8.

[0058] The rear support system includes a fixed housing 12. Multiple layers are provided inside the fixed housing 12. A first motor 13 is installed inside the fixed housing 12, and the first motor 13 is fixedly connected to the inner wall of the fixed housing 12;

[0059] The inside of the fixed housing 12 includes a first cavity 14. The lifting member 10 is located inside the first cavity 14. A first through hole is provided on the first cavity 14, and the first through hole is adapted for the lifting member 10 to output expansion and contraction;

[0060] The lifting member 10 is connected to the first motor 13, and the first motor 13 is adapted to move the lifting member 10 up and down along the first cavity 14.

[0061] A first bevel gear 15 is installed at the output end of the first motor 13. A bearing seat 16 is installed inside the fixed housing 12. The bearing seat 16 is fixedly connected to the fixed housing 12. A horizontal shaft 17 is installed on the bearing seat 16, and the horizontal shaft 17 is fixedly connected to the bearing seat 16. A second bevel gear 18 is installed at one end of the horizontal shaft 17, and the second bevel gear 18 meshes with the first bevel gear 15;

[0062] A connection port 19 is provided on one side of the bottom of the lifting member 10 opposite to the first motor 13. The other end of the horizontal shaft 17 is located inside the connection port 19. A gear 20 is installed at the other end of the horizontal shaft 17. A rack 21 is provided inside the lifting member 10, and the rack 21 meshes with the gear 20.

[0063] The lifting member 10 includes a columnar housing 22, a straight rod 23, and an arc-shaped member 24. The rack 21 is installed inside the columnar housing 22, and the columnar housing 22 is fixedly connected to the rack 21. The size of the columnar housing 22 is smaller than the size of the first cavity 14;

[0064] The arc-shaped member 24 has the same arc surface as the corresponding surface of the mixing drum 3. One end of the straight rod 23 is fixedly connected to the arc-shaped member 24, and the other end of the straight rod 23 is fixedly connected to the surface of the columnar housing 22.

[0065] The steering member 11 includes a second motor 29 and a grooved wheel mechanism. A driving dial 30 is installed at the output end of the second motor 29, and the driving dial 30 is fixedly connected to the second motor 29;

[0066] The supporting wheel 8 is installed on the bracket 31, and the supporting wheel 8 is fixedly connected to the bracket 31. The bracket 31 is installed on the rotary disk 32, and the bracket 31 is fixedly connected to the rotary disk 32. A slewing bearing 33 is installed at the edge of the rotary disk 32. A second through hole is provided on the fixed housing 12, and the slewing bearing 33 is installed in the second through hole. A rotating shaft 34 is installed in the slewing bearing 33. A driven sheave 35 is installed at the bottom end of the rotating shaft 34, and the driving dial 30 is adapted to the driven sheave 35.

[0067] The height that the lifting member 10 jacks up the mixing drum 3 is greater than the thickness of the supporting wheel 8, and the second motor 29 is a stepping motor.

[0068] The annular raceway 9 includes a first raceway 36 and a second raceway 37. The first raceway 36 and the second raceway 37 are respectively arranged at both ends of the annular raceway 9, and both the first raceway 36 and the second raceway 37 are adapted to the supporting wheel 8;

[0069] Rollers 41 are arranged inside the arc-shaped member 24. There are multiple groups of rollers 41, and the rollers 41 are adapted to move the arc-shaped member 24 along the surface of the mixing drum 3.

[0070] The transverse moving plate 7 includes a hydraulic telescopic rod 38 and a transverse plate 39. The oil inlet and outlet of the hydraulic telescopic rod 38 are respectively connected to a second independent oil tank 40. The hydraulic telescopic rod 38 is adapted to push the transverse plate 39 to move horizontally. The stroke of the hydraulic telescopic rod 38 is adapted for the supporting wheel 8 to roll from the first raceway 36 to the second raceway 37, and the transverse plate 39 is adapted to drive the feeding and discharging system 4 to move transversely.

[0071] An inclination transformation method for a concrete mixer truck with a variable cylinder inclination angle includes the following steps:

[0072] Step 1: When the concrete mixer truck is operating and the height of the mixing drum 3 needs to be adjusted, first pull over and stop, and the mixing drum 3 stops rotating. According to the type of the actually installed lifting member 10, open:

[0073] For the lifting member 10 connected by the gear 20 and the rack 21, first turn on the first motor 13. The first motor 13 drives the horizontal shaft 17 to the gear 20 in sequence. The gear 20 drives the rack 21 to drive the straight rod 23 to move upward, and the arc-shaped member 24 rises to fit the mixing drum 3, and multiple arc-shaped members 24 jack up the mixing drum 3;

[0074] Step 2: Turn on the second motor 29, and after the second motor 29 drives the sheave mechanism to rotate once, turn it off, so that the supporting wheel 8 rotates 90°;

[0075] Step 3: Drive the transverse moving plate 7 to connect the oil circuit of the hydraulic telescopic rod 38. The hydraulic telescopic rod 38 pushes the transverse plate 39 to move horizontally along the tangential direction of the moving direction of the supporting wheel 8, and the supporting wheel 8 moves from the first raceway 36 to the second raceway 37;

[0076] Step 4: Repeat the operation steps of Step 2 again. Turn on the second motor 29. After the second motor 29 drives the sheave mechanism to rotate once, turn it off, so that the supporting wheel 8 rotates 90°;

[0077] Step 5: Open according to the type of lifting member 10 actually installed:

[0078] For the lifting member 10 connected by the gear 20 and the rack 21, turn on the first motor 13 in the reverse direction. The first motor 13 drives the horizontal shaft 17 to the gear 20 in sequence. The gear 20 drives the rack 21 to drive the straight rod 23 to move downward. The arc-shaped member 24 descends until the columnar shell 22 returns to the first cavity 14, and the supporting wheel 8 rolls circumferentially along the second raceway 37 again;

[0079] Step 6: Complete a single height adjustment. The supporting wheel 8 rotates on the mixing drum 3 along the second raceway 37 again, and the concrete mixer truck continues to drive on the road.

[0080] Embodiment 2

[0081] As Figures 8 to 9 shown, this is another embodiment of the present invention. Based on the content of Embodiment 1, the lifting member 10 is modified as follows: The rear support system includes a fixed shell 12. There are multiple layers inside the fixed shell 12. The fixed shell 12 includes a first cavity 14. The lifting member 10 is located in the first cavity 14. A first through hole is opened on the first cavity 14, and the first through hole is suitable for the lifting member 10 to expand and contract;

[0082] The lifting member 10 includes an electric hydraulic push rod 25. The electric hydraulic push rod 25 is installed in the first cavity 14. The output end of the electric hydraulic push rod 25 is installed with a rigid coupling 26. One end of the rigid coupling 26 is fixedly connected to the electric hydraulic push rod 25. The other end of the rigid coupling 26 is installed with a coupling shaft 27. The coupling shaft 27 is fixedly connected to the rigid coupling 26. A straight rod 23 is installed at the end of the coupling shaft 27 away from the electric hydraulic push rod 25. The coupling shaft 27 is fixedly connected to the straight rod 23. An arc-shaped member 24 is installed at the end of the straight rod 23 away from the coupling shaft 27. The arc-shaped member 24 is fixedly connected to the coupling shaft 27;

[0083] A first independent oil tank 28 is arranged on one side of the electric hydraulic push rod 25. The electric hydraulic push rod 25 is connected to the first independent oil tank 28.

[0084] An inclination transformation method for a concrete mixer truck with a variable cylinder inclination angle includes the following steps:

[0085] Step 1: When the concrete mixer truck is operating and the height of the mixing drum 3 needs to be adjusted, first pull over and stop. The mixing drum 3 stops rotating. Open according to the type of lifting member 10 actually installed:

[0086] Energize the left electromagnet of the three-position four-way solenoid valve and turn it to the left end, so that the oil circuit turns and is connected. The output end of the electro-hydraulic push rod 25 drives the arc-shaped part 24 to jack up. When the stroke is completed, turn the three-position four-way solenoid valve to the middle position to keep the mixing drum 3 jacked up.

[0087] Step 2: Turn on the second motor 29. After the second motor 29 drives the sheave mechanism to rotate once, turn it off, so that the supporting wheel 8 rotates 90°.

[0088] Step 3: Drive the transverse moving plate 7 to connect the oil circuit of the hydraulic telescopic rod 38. The hydraulic telescopic rod 38 pushes the transverse plate 39 to move horizontally in the tangential direction of the moving direction of the supporting wheel 8, and the supporting wheel 8 moves from the first raceway 36 to the second raceway 37.

[0089] Step 4: Repeat the operation steps of Step 2 again. Turn on the second motor 29. After the second motor 29 drives the sheave mechanism to rotate once, turn it off, so that the supporting wheel 8 rotates 90°.

[0090] Step 5: Open according to the type of lifting member 10 actually installed:

[0091] When using the lifting member 10 connected by the electro-hydraulic push rod 25, energize the right electromagnet of the three-position four-way solenoid valve and turn it to the right end, so that the oil circuit turns and is connected. The output end of the electro-hydraulic push rod 25 drives the arc-shaped part 24 to retract downward. When the stroke is completed, turn the three-position four-way solenoid valve to the middle position.

[0092] Step 6: Complete a single height adjustment. The supporting wheel 8 rotates again on the mixing drum 3 along the second raceway 37, and the concrete mixer truck continues to drive on the road.

[0093] Figure 1 The front drive system 2 is a motor and a reducer. The contents of the front drive system 2 and the feeding and discharging system 4 are all well-known common knowledge in the art, so they will not be specifically described in detail.

[0094] Figure 3 Regarding the position of the groove 6, since the mixing drum 3 needs downward movement space, the groove 6 is composed of multiple groups of longitudinal connecting rods.

[0095] Figure 8 There is no connection between the first independent oil tank 28 and the electro-hydraulic push rod 25. The first independent oil tank 28 is connected to the oil inlet and outlet of the electro-hydraulic push rod 25. The electro-hydraulic push rod 25 can be replaced by an oil cylinder that realizes the piston function.

[0096] Figure 10 It is a hydraulic schematic diagram for connecting the electro-hydraulic push rod 25. It can be understood that the piston rod is the electro-hydraulic push rod 25. A synchronous circuit with a speed control valve is adopted to make two groups of electro-hydraulic push rods 25 share a set of circuits to complete the same up and down movement. It is not limited to the circuit provided in this embodiment, and any circuit that achieves the same effect is acceptable.

[0097] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention.

[0098] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A concrete mixer truck with a variable inclination angle of the drum body, comprising a vehicle frame (1), on which a front drive system (2), a mixing drum (3), a rear support system, and a feeding and discharging system (4) are respectively installed. The front drive system (2) is connected to the front end of the mixing drum (3), and the front drive system (2) is adapted to drive the mixing drum (3) to rotate. The mixing drum (3) is inclined, the rear support system is adapted to support the rear end of the mixing drum (3), and the feeding and discharging system (4) is connected to the opening of the mixing drum (3). It is characterized in that: A rotating seat (5) is installed on the vehicle frame (1). The front drive system (2) is rotatably connected to the rotating seat (5). A groove (6) is formed on the vehicle frame (1), and the groove (6) is located below the mixing drum (3). The groove (6) is adapted for the mixing drum (3) to descend. Transverse moving plates (7) are installed on both sides of the groove (6), and the transverse moving plates (7) are respectively fixedly connected to the feeding and discharging system (4) and the rear support system. The transverse moving plates (7) are adapted to move the rear support system; The rear support system includes a supporting wheel (8). An annular raceway (9) corresponding to the supporting wheel (8) is installed on the mixing drum (3). The supporting wheel (8) rolls in the annular raceway (9), and the supporting wheel (8) is adapted to roll along the annular raceway (9) and support the mixing drum (3); The rear support system further includes a lifting member (10) and a steering member (11). The top surface of the lifting member (10) has the same arc surface as the corresponding position of the mixing drum (3). The lifting member (10) is adapted to jack up the mixing drum (3). The steering member (11) is fixedly connected to the bottom of the supporting wheel (8), and the steering member (11) is adapted to steer the supporting wheel (8); The height that the lifting member (10) jacks up the mixing drum (3) is greater than the thickness of the supporting wheel (8); The annular raceway (9) includes a first raceway (36) and a second raceway (37). The first raceway (36) and the second raceway (37) are respectively arranged at both ends of the annular raceway (9), and both the first raceway (36) and the second raceway (37) are adapted to the supporting wheel (8); The transverse moving plate (7) includes a hydraulic telescopic rod (38) and a transverse plate (39). The oil inlet and outlet of the hydraulic telescopic rod (38) are respectively connected to a second independent oil tank (40). The hydraulic telescopic rod (38) is adapted to push the transverse plate (39) to move horizontally, and the stroke of the hydraulic telescopic rod (38) is adapted for the supporting wheel (8) to roll from the first raceway (36) to the second raceway (37).

2. The concrete mixer truck with a variable inclination angle of the drum body according to claim 1, characterized in that: The rear support system includes a fixed shell (12). Multiple layers are arranged inside the fixed shell (12). A first motor (13) is installed inside the fixed shell (12), and the first motor (13) is fixedly connected to the inner wall of the fixed shell (12); The inside of the fixed shell (12) includes a first cavity (14). The lifting member (10) is located inside the first cavity (14). A first through hole is formed on the first cavity (14), and the first through hole is adapted for the lifting member (10) to output expansion and contraction; The lifting member (10) is connected to the first motor (13), and the first motor (13) is adapted to move the lifting member (10) up and down along the first cavity (14).

3. The concrete mixer truck with a variable inclination angle of the drum body according to claim 2, characterized in that: A first bevel gear (15) is installed at the output end of the first motor (13). A bearing seat (16) is installed in the fixed housing (12). The bearing seat (16) is fixedly connected to the fixed housing (12). A transverse shaft (17) is installed on the bearing seat (16). The transverse shaft (17) is fixedly connected to the bearing seat (16). A second bevel gear (18) is installed at one end of the transverse shaft (17). The second bevel gear (18) meshes with the first bevel gear (15). On one side of the bottom of the lifting member (10) relative to the first motor (13), a connection port (19) is provided. The other end of the transverse shaft (17) is located in the connection port (19). A gear (20) is installed at the other end of the transverse shaft (17). A rack (21) is provided in the lifting member (10). The rack (21) meshes with the gear (20).

4. The concrete mixer truck with a variable inclination angle of the drum body according to claim 3, characterized in that: The lifting member (10) includes a columnar housing (22), a straight rod (23) and an arc-shaped member (24). The rack (21) is installed in the columnar housing (22). The columnar housing (22) is fixedly connected to the rack (21). The size of the columnar housing (22) is smaller than the size of the first cavity (14). The arc-shaped surface of the arc-shaped member (24) is the same as the corresponding surface of the mixing drum (3). One end of the straight rod (23) is fixedly connected to the arc-shaped member (24). The other end of the straight rod (23) is fixedly connected to the surface of the columnar housing (22).

5. The concrete mixer truck with a variable inclination angle of the drum body according to claim 1, characterized in that: The rear support system includes a fixed housing (12). Multiple layers are provided in the fixed housing (12). The fixed housing (12) includes a first cavity (14). The lifting member (10) is located in the first cavity (14). A first through hole is provided on the first cavity (14). The first through hole is suitable for the lifting member (10) to expand and contract. The lifting member (10) includes an electro-hydraulic push rod (25). The electro-hydraulic push rod (25) is installed in the first cavity (14). A rigid coupling (26) is installed at the output end of the electro-hydraulic push rod (25). One end of the rigid coupling (26) is fixedly connected to the electro-hydraulic push rod (25). The other end of the rigid coupling (26) is installed with a coupling shaft (27). The coupling shaft (27) is fixedly connected to the rigid coupling (26). A straight rod (23) is installed at the end of the coupling shaft (27) away from the electro-hydraulic push rod (25). The coupling shaft (27) is fixedly connected to the straight rod (23). An arc-shaped member (24) is installed at the end of the straight rod (23) away from the coupling shaft (27). The arc-shaped member (24) is fixedly connected to the coupling shaft (27). A first independent oil tank (28) is provided on one side of the electro-hydraulic push rod (25). The electro-hydraulic push rod (25) is connected to the first independent oil tank (28).

6. The concrete mixer truck with a variable inclination angle of the drum body according to any one of claims 2-5, characterized in that: The steering member (11) includes a second motor (29) and a grooved wheel mechanism. A driving dial (30) is installed at the output end of the second motor (29). The driving dial (30) is fixedly connected to the second motor (29). The supporting wheel (8) is installed on the bracket (31), the supporting wheel (8) is fixedly connected with the bracket (31), the bracket (31) is installed on the rotary disk (32), the bracket (31) is fixedly connected with the rotary disk (32), a slewing bearing (33) is installed at the edge of the rotary disk (32), a second through hole is provided on the fixed shell (12), the slewing bearing (33) is installed in the second through hole, a rotating shaft (34) is installed in the slewing bearing (33), a driven sheave (35) is installed at the bottom end of the rotating shaft (34), and the driving dial (30) is adapted to the driven sheave (35).

7. The concrete mixer truck with a variable inclination angle of the drum body according to claim 6, characterized in that: The second motor (29) is a stepper motor.

8. The concrete mixer truck with a variable inclination angle of the drum body according to claim 7, characterized in that: Rollers (41) are arranged in the arc-shaped member (24), multiple groups of rollers (41) are provided, and the rollers (41) are adapted to move the arc-shaped member (24) along the surface of the mixing drum (3).

9. The concrete mixer truck with a variable inclination angle of the drum body according to claim 8, characterized in that:The transverse plate (39) is adapted to drive the feeding and discharging system (4) to move horizontally.

10. A method for changing the inclination angle of a concrete mixer truck with a variable cylinder inclination angle, characterized in that, It includes the following steps: Step 1: When the concrete mixer truck is operating and the height of the mixing drum (3) needs to be adjusted, first pull over to the side and stop the mixing drum (3) from rotating. Open according to the type of lifting member (10) actually installed: S1: For the lifting member (10) connected by the gear (20) and the rack (21), first turn on the first motor (13). The first motor (13) drives the horizontal shaft (17) to the gear (20) in sequence. The gear (20) drives the rack (21) to drive the straight rod (23) to move upward. The arc-shaped member (24) rises to fit the mixing drum (3), and multiple groups of arc-shaped members (24) lift the mixing drum (3). S2: Energize the left electromagnet of the three-position four-way solenoid valve and turn it to the left end, so that the oil circuit turns and is connected. The output end of the electro-hydraulic push rod (25) drives the arc-shaped member (24) to lift upward. When the stroke is completed, turn the three-position four-way solenoid valve to the middle position to keep the mixing drum (3) lifted. Step 2: Turn on the second motor (29). After the second motor (29) drives the sheave mechanism to rotate once, turn it off to make the supporting wheel (8) rotate 90°. Step 3: Drive the transverse moving plate (7) to connect the oil circuit of the hydraulic telescopic rod (38). The hydraulic telescopic rod (38) pushes the transverse plate (39) to move horizontally along the tangential direction of the moving direction of the supporting wheel (8), and the supporting wheel (8) moves from the first raceway (36) to the second raceway (37). Step 4: Repeat the operation steps of Step 2 again. Turn on the second motor (29). After the second motor (29) drives the sheave mechanism to rotate once, turn it off to make the supporting wheel (8) rotate 90°. Step 5: Open according to the type of lifting member (10) actually installed: S1: For the lifting member (10) connected by the gear (20) and the rack (21), turn on the first motor (13) in the reverse direction. The first motor (13) drives the horizontal shaft (17) to the gear (20) in sequence. The gear (20) drives the rack (21) to drive the straight rod (23) to move downward. The arc-shaped member (24) descends until the columnar shell (22) returns to the first cavity (14), and the supporting wheel (8) rolls circumferentially along the second raceway (37) again. S2: When using the lifting member (10) connected by the electro-hydraulic push rod (25), energize the right electromagnet of the three-position four-way solenoid valve and turn it to the right end, so that the oil circuit turns and is connected. The output end of the electro-hydraulic push rod (25) drives the arc-shaped member (24) to retract downward. When the stroke is completed, turn the three-position four-way solenoid valve to the middle position; Step six: Complete a single height adjustment. The supporting wheel (8) rotates again on the mixing drum (3) along the second raceway (37), and the concrete transport vehicle continues to move on the road.

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