Concrete transfer device

By setting up a mixing mechanism in the material tank of the concrete transfer device, and continuously stirring and vibrating the concrete with the swinging components and vibrating components, the problem of early solidification of concrete is solved, and the smooth transport and complete discharge of concrete is achieved.

CN119840001APending Publication Date: 2025-04-18QIONGHAI XIN HAI CONCRETE CO LTD
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Patent Information

Application Number
CN202510245855.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-04
Publication Date
2025-04-18

AI Technical Summary

Technical Problem

Existing concrete transfer devices are difficult to effectively prevent concrete from solidifying early during transportation.

Method used

A concrete transfer device including a base and a material tank is designed. A mixing mechanism is provided in the material tank. The mixing mechanism continuously stirs and vibrates the concrete through the swinging assembly and the vibrating assembly to prevent early solidification.

Benefits of technology

Through continuous stirring and vibration, the flowability of the concrete is ensured, which effectively prevents early solidification, and ensures complete discharge of the concrete during the discharge process.

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Abstract

The invention discloses a concrete transfer device which comprises a base and a material tank, the base is used for moving the material tank, the material tank is used for containing concrete, a stirring mechanism is arranged in the material tank, and the stirring mechanism is used for maintaining the fluidity of the concrete; the stirring mechanism comprises a swing assembly, a vibration assembly and a plurality of connecting rods, the swing assembly comprises a plurality of stirring blades rotationally connected to the connecting rods, the stirring blades and the connecting rods are used for stirring concrete, and clockwork springs are fixedly connected between the stirring blades and the connecting rods. When concrete is transferred, a connecting rod and stirring blades rotate in a material tank to continuously stir the concrete, the stirring blades can make contact with a vertical plate and push the vertical plate to each other in the process that the stirring blades move along with the connecting rod, and then the stirring blades continuously swing under the elastic action of a clockwork spring, so that the concrete can be further stirred; therefore, the flowability is ensured.
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Description

Technical Field

[0001] The invention relates to the technical field of concrete transporting, in particular to a concrete transporting device. Background Art

[0002] Concrete, abbreviated as concrete, is a general term for engineering composite materials in which aggregates are bonded into a whole by cementitious materials. The term concrete usually refers to cement as the cementitious material, sand and stone as aggregates; and water (which may contain admixtures and additives) in a certain proportion and stirred to obtain cement concrete, also called ordinary concrete, which is widely used in civil engineering.

[0003] Concrete is generally transported directly from the mixing plant to the designated location by cement tank trucks. However, since tank trucks are often large in size, they may face terrain difficulties in some special locations or situations, making it impossible to deliver the concrete directly to the destination. In this case, carts, bucket trucks or pump trucks are required to transport concrete over short distances. Different transportation tools are suitable for different transportation distances and scenarios, but different concrete mix ratios will have different setting times. Therefore, even for short-distance transportation, it is still necessary to consider preventing the concrete from solidifying prematurely.

[0004] After searching, the Chinese invention patent with publication number CN105345929B discloses a transport vehicle for concrete, including a vehicle body and wheels, the wheels are connected to the lower side of the vehicle body, the wheels form an upper cavity that can accommodate concrete, at least two protrusions are provided in the upper cavity, the lower side of the upper cavity is connected to the lower cavity, the wheels are located below the lower cavity, at least two wedge rods passing through the upper cavity are provided in the lower cavity, the wedge rods are slidably connected to the wall of the upper cavity, each wedge rod is fixedly connected to a protrusion, a slide groove is provided below the wedge rod, a push rod is slidably connected to the slide groove, a group of rollers are provided on the push rod, each roller is abutted against a wedge rod, and a cam is abutted against one side of the push rod. In the process of transporting concrete, the application drives the protrusion to reciprocate up and down by the cam to maintain the dynamic state of the concrete, but because the concrete is in a viscous fluid form before solidification, the overall flow effect of the concrete cannot be guaranteed by relying solely on the movement of the protrusion, and it is also impossible to effectively prevent the phenomenon of early solidification of the concrete during the transportation process, so it will cause inconvenience in the transportation of concrete. Summary of the invention

[0005] In view of the above-mentioned prior art, the present invention provides a concrete transfer device, and the main technical problem to be solved is how to prevent the concrete from solidifying prematurely during the transfer process.

[0006] To achieve the above object, the technical solution of the embodiment of the present invention is implemented as follows:

[0007] A concrete transfer device comprises a base and a material tank, wherein the base is used to move the material tank, the material tank is used to contain concrete, and a stirring mechanism is arranged inside the material tank, and the stirring mechanism is used to maintain the fluidity of the concrete;

[0008] The stirring mechanism includes a swinging assembly, a vibration assembly and a plurality of connecting rods. The swinging assembly includes a plurality of stirring blades rotatably connected to the connecting rods. Both the stirring blades and the connecting rods are used to stir concrete. A clockwork spring is fixedly connected between the stirring blades and the connecting rods. The vibration assembly includes a plurality of vertical plates fixedly connected to the inner wall of the material tank. The vertical plates are arranged on the movement path of the stirring blades. The vertical plates are pushed by the stirring blades to generate vibration, and the stirring blades are pushed by the vertical plates to generate swing.

[0009] Furthermore, rollers are fixedly connected to the four outer corners of the bottom end of the base, and a handrail is fixedly connected to one side of the base, the material tank is arranged above the base, and a discharge hopper is fixedly connected to the side of the material tank away from the handrail, a discharge port is opened on one side of the discharge hopper, and a valve is provided at the discharge port, the discharge hopper is hemispherical, a feed port is opened at the top of the material tank, and a feed hopper is fixedly connected to the material tank at the feed port.

[0010] Furthermore, the top of the base is fixedly connected to support plates on both sides of one end of the material tank, and the two support plates are rotatably connected to the material tank. The top of the base is fixedly connected to side plates on both sides of the other end of the material tank. Guide grooves are opened on the plate bodies of the two side plates, and the guide grooves are arc-shaped. The two side plates are respectively slidably connected to guide rods at the two guide grooves, and one end of the two guide rods is fixedly connected to a fixing rod, and the two fixing rods are fixedly connected to the material tank.

[0011] Furthermore, a first circular hole is opened in the middle of a side of the material tank away from the discharge hopper, and the material tank is rotatably connected to a rotating shaft at the first circular hole, a side wall of the material tank is fixedly connected to a motor at the first circular hole, an output shaft of the motor is fixedly connected to the rotating shaft, a fixing plate is fixedly connected to a side of the inner wall at the bottom end of the material tank close to the discharge hopper, a connecting shaft is fixedly connected to the top of one side of the fixing plate, and a connecting plate is fixedly connected to the ends of the rotating shaft and the connecting shaft close to each other.

[0012] Furthermore, several connecting rods are fixedly connected to the outer side between the two connecting plates, a groove is opened at the inner top of the stirring blade, and through holes are opened on both sides of the groove of the stirring blade, the diameter of the through hole is smaller than the diameter of the groove, the connecting rod is rotatably connected to the stirring blade at the through hole, and a clockwork spring is arranged in the groove.

[0013] Furthermore, a cavity is opened on one side of the base near the armrest, and a second circle is opened in the cavity on one side of the base near the armrest. The base is rotatably connected to a threaded rod at the second circle, the outer part of the rod body of the threaded rod in the cavity is threadedly connected to a threaded sleeve, and one end of the threaded rod outside the cavity is fixedly connected to a knob.

[0014] Furthermore, the top of the threaded sleeve is rotatably connected to a support rod, the top of the base is provided with a strip opening in the cavity, the support rod extends to the outside of the base at the strip opening, and the top of the support rod is rotatably connected to the material tank, the base is fixedly connected to a guide rail at the bottom inner wall of the cavity, a slide groove is provided at the bottom end of the threaded sleeve, and the threaded sleeve is slidably connected to the guide rail at the slide groove.

[0015] Furthermore, slots are provided at the top and bottom ends of the side panel, and a threaded groove is provided at one end of the side panel inside the slot. A pin is provided in the slot, and the pin is adapted to the slot. A threaded head is fixedly connected to one end of the pin inside the side panel, and the threaded head is threadedly connected to the side panel at the threaded groove. A handle is fixedly connected to one end of the pin outside the side panel.

[0016] The beneficial effects of the present invention are:

[0017] 1. When using this device to transport concrete, the rotation of the connecting rod and the mixing blades in the material tank will continuously stir the concrete, and the mixing blades will contact the vertical plate and push each other as the connecting rod moves. After that, the mixing blades will continue to swing under the elastic force of the spring, so that the concrete can be further stirred to ensure its fluidity; after the vertical plate is squeezed and deformed, it will continue to shake due to its own elastic force, thereby causing the material tank to vibrate, thereby preventing the concrete from sticking to its internal parts and various components, so as to prevent the concrete from solidifying early during the transportation process;

[0018] 2. After using this device to transport concrete to the destination, the material tank can be adjusted to a tilted state by shaking the knob. In this case, the rotation of the connecting rod and the rotation and swing of the mixing blade can assist in the discharge of concrete, and the vibration of the material tank can also prevent the concrete from sticking, so the discharge can be guaranteed to be complete, thereby facilitating the discharge process of concrete after transportation;

[0019] 3. By setting a latch on the side panel, since the tilt adjustment of the material tank will drive the guide rod to move in the guide groove, and the latch can limit the guide rod, the latch can be used to support and fix the material tank after the tilt adjustment, so as to maintain the stability of the material tank during the discharge process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of a concrete transfer device in Example 1 of the present application;

[0021] Figure 2 A cross-sectional view of a material tank of a concrete transfer device in Example 1 of the present application;

[0022] Figure 3 A cross-sectional perspective view of a mixing blade of a concrete transfer device in Example 1 of the present application;

[0023] Figure 4 This is a front cross-sectional view of a mixing blade of a concrete transfer device in Example 1 of the present application;

[0024] Figure 5 A partial cross-sectional view of a base of a concrete transfer device in Example 1 of the present application;

[0025] Figure 6 This is a side sectional view of a side plate of a concrete transfer device in Example 2 of the present application.

[0026] Description of Figure Numbers:

[0027] Base 1, material tank 2, guide groove 3, side plate 4, guide rod 5, fixing rod 6, knob 7, handrail 8, motor 9, feed hopper 10, discharge hopper 11, support plate 12, roller 13, rotating shaft 14, connecting plate 15, connecting rod 16, stirring blade 17, groove 1701, through hole 1702, vertical plate 18, fixing plate 19, connecting shaft 20, clockwork spring 21, support rod 22, threaded rod 23, guide rail 24, threaded sleeve 25, threaded head 26, latch 27, handle 28, threaded groove 29, slot 30. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further elaborated in detail below in conjunction with the drawings and specific embodiments of the specification. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. In the following description, the expression "some embodiments" is related to a subset of all possible embodiments, but it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0029] It should also be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "inside", "outside", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0030] Example 1

[0031] See attached Figure 1-5 The present application provides a concrete transfer device, comprising a base 1 and a material tank 2, wherein the base 1 is used to move the material tank 2, and the material tank 2 is used to contain concrete. A stirring mechanism is provided inside the material tank 2, and the stirring mechanism is used to maintain the fluidity of the concrete, so that the concrete can be stirred during the transfer process to achieve the effect of preventing early solidification;

[0032] The stirring mechanism includes a swing component, a vibration component and a plurality of connecting rods 16. The swing component includes a plurality of stirring blades 17 rotatably connected to the connecting rods 16. The stirring blades 17 and the connecting rods 16 are both used to stir concrete. A clockwork spring 21 is fixedly connected between the stirring blades 17 and the connecting rods 16. The vibration component includes a plurality of vertical plates 18 fixedly connected to the inner wall of the material tank 2. The vertical plates 18 are arranged on the movement path of the stirring blades 17. That is, when the stirring blades 17 move with the rotation of the connecting rods 16, they will contact and push each other with the vertical plates 18, thereby causing the two to deform. The vertical plates 18 are pushed by the stirring blades 17 to produce shaking, and the stirring blades 17 are pushed by the vertical plates 18 to produce swinging.

[0033] When transporting concrete, the device can be moved to the side of the cement tank truck and the motor 9 can be started. The motor 9 drives the connecting plate 15 to rotate through the rotating shaft 14. The connecting plate 15 drives the mixing blade 17 to rotate through the connecting rod 16. As the connecting rod 16 rotates, the mixing blade 17 will contact and squeeze the vertical plate 18, causing the mixing blade 17 to deflect and the vertical plate 18 to deform. After that, the continued movement of the mixing blade 17 will separate from the vertical plate 18; at this time, the mixing blade 17 will continue to swing under the elastic force of the clockwork spring 21, and the vertical plate 18 will continue to shake due to its own elastic force, thereby causing the material tank 2 to vibrate.

[0034] Preferably, rollers 13 are fixedly connected at the four outer corners of the bottom end of the base 1, and the rollers 13 are universal wheels with built-in brakes, and an armrest 8 is fixedly connected to one side of the base 1, the material tank 2 is arranged above the base 1, and a discharge hopper 11 is fixedly connected to the side of the material tank 2 away from the armrest 8, a discharge port is provided on one side of the discharge hopper 11, and a valve is provided at the discharge port of the discharge hopper 11, and the discharge hopper 11 is hemispherical, a feed port is provided at the top of the material tank 2, and a feed hopper 10 is fixedly connected to the feed port of the material tank 2, and a cover plate is provided on the feed hopper 10.

[0035] Preferably, the top of the base 1 is fixedly connected with support plates 12 on both sides of one end of the material tank 2, and the two support plates 12 are rotatably connected to the material tank 2. The top of the base 1 is fixedly connected with side plates 4 on both sides of the other end of the material tank 2. The plate bodies of the two side plates 4 are provided with guide grooves 3, and the guide grooves 3 are arc-shaped. The two side plates 4 are slidably connected with guide rods 5 at the two guide grooves 3, respectively. One end of the two guide rods 5 is fixedly connected with fixed rods 6, and the two fixed rods 6 are fixedly connected to the material tank 2. In the process of adjusting the inclination of the material tank 2, the material tank 2 will drive the guide rods 5 to move in the guide grooves 3 through the fixed rods 6, so the guide grooves 3 can limit the guide rods 5, ensuring that the material tank 2 will deflect along the established route, so that the smoothness and stability of its adjustment process can be maintained.

[0036] Concrete in the cement tank truck can be poured into the material tank 2 from the feed hopper 10 , and then the base 1 can be pushed by the handrail 8 , and the concrete can be transported by the material tank 2 .

[0037] Preferably, a first circular hole is opened in the middle of the side of the material tank 2 away from the discharge hopper 11, and the material tank 2 is rotatably connected to a rotating shaft 14 at the first circular hole, and a motor 9 is fixedly connected to the side wall of the material tank 2 at the first circular hole. The motor 9 is a reduction motor, so the rotation speed of the connecting rod 16 and the stirring blade 17 can be slowed down to avoid excessive stirring. The output shaft of the motor 9 is fixedly connected to the rotating shaft 14, and a fixed plate 19 is fixedly connected to the inner wall of the bottom end of the material tank 2 near the discharge hopper 11. A connecting shaft 20 is fixedly connected to the top of one side of the fixed plate 19. The ends of the rotating shaft 14 and the connecting shaft 20 that are close to each other are fixedly connected to a connecting plate 15, and the connecting plate 15 can be in the shape of a "one", or a "cross" or a polygonal star.

[0038] Preferably, several connecting rods 16 are fixedly connected at the outer side between the two connecting plates 15, a groove 1701 is opened at the inner top end of the stirring blade 17, and the stirring blade 17 is opened at both sides of the groove 1701 with through holes 1702, the diameter of the through hole 1702 is smaller than the diameter of the groove 1701, the connecting rod 16 is rotatably connected to the stirring blade 17 at the through hole 1702, and the clockwork spring 21 is arranged in the groove 1701.

[0039] After the concrete enters the material tank 2, the rotation of the connecting rod 16 and the movement and swing of the stirring blades 17 can stir the concrete to maintain its fluidity; and the vibration of the material tank 2 can prevent the concrete from sticking to the various components in the material tank 2, thereby avoiding the phenomenon of premature solidification of the concrete during transportation.

[0040] Preferably, a cavity is opened inside the base 1 at one side close to the armrest 8, and a second circle is opened in the cavity at one side close to the armrest 8, the base 1 is rotatably connected to a threaded rod 23 at the second circle, the threaded sleeve 25 is threadedly connected to the outside of the rod body of the threaded rod 23 in the cavity, and a knob 7 is fixedly connected to one end of the threaded rod 23 outside the cavity.

[0041] Preferably, the top end of the threaded sleeve 25 is rotatably connected to the support rod 22, the top end of the base 1 is provided with a strip opening at the cavity, the support rod 22 extends to the outside of the base 1 at the strip opening, and the top end of the support rod 22 is rotatably connected to the material tank 2, the base 1 is fixedly connected with a guide rail 24 at the inner wall of the bottom end of the cavity, the bottom end of the threaded sleeve 25 is provided with a slide groove, and the threaded sleeve 25 is slidably connected to the guide rail 24 at the slide groove.

[0042] When the concrete is transported to the destination, the knob 7 can be shaken, and the knob 7 can drive the threaded rod 23 to rotate to make the threaded sleeve 25 move in the horizontal direction, so that the threaded sleeve 25 can push the material tank 2 through the support rod 22 and make one end of it tilt upward. In this case, the material tank 2 will be in a tilted state, and after the valve on the discharge hopper 11 is opened, the concrete will be discharged from the discharge port;

[0043] During the concrete discharging process, the rotation of the connecting rod 16 and the movement and swing of the mixing blade 17 can assist the smooth discharge of the concrete, while the vibration of the material tank 2 can ensure the complete discharge of the concrete, thereby ensuring the convenience of the discharging of the device.

[0044] Example 2

[0045] Refer to the attached Figure 6 The present application provides a concrete transfer device. Compared with Example 1, in order to maintain the stability of the material tank during the discharge process, slots 30 are provided at the top and bottom ends of the side panel 4, and a threaded groove 29 is provided at one end of the inner part of the slot 30 of the side panel 4. A latch 27 is provided in the slot 30 of the side panel 4, and the latch 27 is adapted to the slot 30. A threaded head 26 is fixedly connected to one end of the latch 27 inside the side panel 4. The threaded head 26 is threadedly connected to the side panel 4 at the threaded groove 29, and a handle 28 is fixedly connected to one end of the latch 27 outside the side panel 4.

[0046] Before and after the deflection adjustment of the material tank 2, the pin 27 can be inserted into the upper and lower slots 30 respectively, and the threaded head 26 can be used to connect with the thread of the side plate 4 at the thread groove 29 to achieve the fixation of the pin 27. In this case, the pin 27 can be used to limit the guide rod 5, so that the material tank 2 can be fixed and supported by the fixing rod 6, thereby ensuring the stability of the material tank 2 during the discharge process.

[0047] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. The protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A concrete transfer device, comprising a base (1) and a material tank (2), characterized in that: The base (1) is used for moving the material tank (2), the material tank (2) is used for containing concrete, and a stirring mechanism is provided inside the material tank (2), and the stirring mechanism is used for maintaining the fluidity of the concrete; The stirring mechanism comprises a swing component, a vibration component and a plurality of connecting rods (16); the swing component comprises a plurality of stirring blades (17) rotatably connected to the connecting rods (16); the stirring blades (17) and the connecting rods (16) are both used to stir concrete; a spring (21) is fixedly connected between the stirring blades (17) and the connecting rods (16); the vibration component comprises a plurality of vertical plates (18) fixedly connected to the inner wall of the material tank (2); the vertical plates (18) are arranged on the movement path of the stirring blades (17); the vertical plates (18) are pushed by the stirring blades (17) to generate vibration; and the stirring blades (17) are pushed by the vertical plates (18) to generate swing.

2. A concrete transport device according to claim 1, characterized in that: Rollers (13) are fixedly connected at the four outer corners of the bottom end of the base (1), and a handrail (8) is fixedly connected to one side of the base (1). The material tank (2) is arranged above the base (1), and a discharge hopper (11) is fixedly connected to the side of the material tank (2) away from the handrail (8). A discharge port is provided on one side of the discharge hopper (11), and a valve is provided at the discharge port of the discharge hopper (11). The discharge hopper (11) is hemispherical. A feed port is provided at the top of the material tank (2), and a feed hopper (10) is fixedly connected to the feed port of the material tank (2).

3. A concrete transport device according to claim 2, characterized in that: The top of the base (1) is fixedly connected to support plates (12) on both sides of one end of the material tank (2), and the two support plates (12) are rotatably connected to the material tank (2). The top of the base (1) is fixedly connected to side plates (4) on both sides of the other end of the material tank (2). The two side plates (4) are provided with guide grooves (3) on their plate bodies, and the guide grooves (3) are arc-shaped. The two side plates (4) are slidably connected to guide rods (5) at the two guide grooves (3), respectively. One end of the two guide rods (5) is fixedly connected to a fixing rod (6), and the two fixing rods (6) are fixedly connected to the material tank (2).

4. A concrete transport device according to claim 2, characterized in that: A first circular hole is provided in the middle of a side of the material tank (2) away from the discharge hopper (11), and the material tank (2) is rotatably connected to a rotating shaft (14) at the first circular hole. A motor (9) is fixedly connected to the side wall of the material tank (2) at the first circular hole, and the output shaft of the motor (9) is fixedly connected to the rotating shaft (14). A fixing plate (19) is fixedly connected to the inner wall of the bottom end of the material tank (2) near the discharge hopper (11), and a connecting shaft (20) is fixedly connected to the top of one side of the fixing plate (19), and a connecting plate (15) is fixedly connected to the ends of the rotating shaft (14) and the connecting shaft (20) near each other.

5. A concrete transport device according to claim 4, characterized in that: A plurality of connecting rods (16) are fixedly connected at the outer sides between the two connecting plates (15); a groove (1701) is provided at the inner top end of the stirring blade (17); and through holes (1702) are provided at both sides of the groove (1701) of the stirring blade (17); the diameter of the through hole (1702) is smaller than the diameter of the groove (1701); the connecting rod (16) is rotatably connected to the stirring blade (17) at the through hole (1702); and the clockwork spring (21) is arranged in the groove (1701).

6. A concrete transport device according to claim 2, characterized in that: A cavity is provided inside the base (1) at a side close to the handrail (8), and a second circle is provided at the cavity at a side close to the handrail (8). The base (1) is rotatably connected to a threaded rod (23) at the second circle, and a threaded sleeve (25) is threadedly connected to the outside of the rod body of the threaded rod (23) in the cavity, and a knob (7) is fixedly connected to one end of the threaded rod (23) outside the cavity.

7. A concrete transport device according to claim 6, characterized in that: The top end of the threaded sleeve (25) is rotatably connected to a support rod (22); the top end of the base (1) is provided with a strip opening at the cavity; the support rod (22) extends to the outside of the base (1) at the strip opening; and the top end of the support rod (22) is rotatably connected to the material tank (2); the base (1) is fixedly connected to a guide rail (24) at the inner wall of the bottom end of the cavity; a slide groove is provided at the bottom end of the threaded sleeve (25), and the threaded sleeve (25) is slidably connected to the guide rail (24) at the slide groove.

8. A concrete transport device according to claim 3, characterized in that: The top and bottom ends of the plate body of the side plate (4) are both provided with a slot (30), and the side plate (4) is provided with a threaded groove (29) at one end inside the slot (30), and the side plate (4) is provided with a latch (27) in the slot (30), and the latch (27) is adapted to the slot (30), and one end of the latch (27) inside the side plate (4) is fixedly connected with a threaded head (26), and the threaded head (26) is threadedly connected to the side plate (4) at the threaded groove (29), and one end of the latch (27) outside the side plate (4) is fixedly connected with a handle (28).

Citation Information

Patent Citations

  • Transfer vehicles for concrete

    CN105345929B