Mixing truck tank body driving device with safety device

Abstract

The utility model discloses a mixer truck tank body driving device with a safety device, which comprises a motor, a speed reducer and a brake, the brake comprises a shell, a brake shaft, a brake piston and an electromagnetic coil, wherein the brake shaft, the brake piston and the electromagnetic coil are arranged in the shell. The brake shaft is rotatably arranged in the shell, one end of the brake shaft is provided with a gear, and the gear is meshed with a driven gear of the speed reducer; a brake friction disc is arranged at the other end of the brake shaft; the brake piston is movably arranged in the shell, one side of the brake piston is matched with the brake friction disc, and a plurality of brake elastic assemblies and electromagnetic coils are arranged between the other side of the brake piston and the shell. According to the mixer truck tank body driving device with the safety device, under the condition that a truck is powered off, the safety device can apply braking force to the mixer truck tank body, the mixer truck tank body is prevented from rotating or swinging under the action of external force, and the safety of the mixer truck tank body driving device is improved.

Description

Technical Field

[0001] This utility model relates to the field of mixer truck tank drive; specifically, it relates to a mixer truck tank drive device with a safety device. Background Technology

[0002] Current new energy concrete mixer trucks rely on an electric motor to drive a reducer, which transmits power to the mixing tank to achieve rotation. Changes in the tank's rotation speed are regulated by the motor's output of forward or reverse torque, enabling acceleration, deceleration, and stopping. However, in the following situations, uncontrollable tank rotation poses a safety hazard.

[0003] 1. During tank feeding or rapid mixing, the motor outputs positive torque, and the tank rotates or accelerates. At this time, if the motor power is suddenly cut off due to a fault, the tank will be out of control under high rotational inertia, which may endanger the safety of people and objects around the vehicle.

[0004] 2. After the concrete mixer truck tank is unloaded, the tank stops rotating, and the motor outputs reverse torque to overcome the eccentricity caused by the uneven distribution of concrete material inside the tank. However, if the entire vehicle is powered off at this time, there is no force to "lock" the empty tank, and the tank may rotate or swing back and forth, posing a safety risk.

[0005] 3. When there is accumulated material inside the tank that needs to be cleaned, the entire vehicle is in a power-off and stationary state, but the tank is in a free state. When a person enters the tank to clean the material, the tank will swing back and forth, which poses a safety risk to manual operation. Utility Model Content

[0006] The purpose of this utility model is to provide a mixing truck tank drive device with a safety device in order to solve the problems existing in the prior art in the background.

[0007] The technical solution adopted by this utility model to solve its technical problem is: a mixing truck tank driving device with a safety device, including a motor, a reducer, and a brake.

[0008] The brake includes: a housing and a brake shaft, a brake piston, and an electromagnetic coil disposed within the housing;

[0009] The brake shaft is rotatably mounted inside the housing. One end of the brake shaft is provided with a gear, which meshes with the driven gear of the reducer. The other end of the brake shaft is provided with a brake friction disc.

[0010] The brake piston is movably disposed within the housing, with one side matching the brake friction disc and the other side having several brake elastic components and an electromagnetic coil between it and the housing.

[0011] Preferably, it also includes a release bolt, which is threadedly connected to the housing. One end of the release bolt protrudes outside the housing and is hexagonal in shape (inner / outer), while the other end is movably connected to the center hole of the brake piston. The end of the release bolt is provided with a limiting part whose outer diameter exceeds the inner diameter of the center hole of the brake piston.

[0012] Preferably, the housing is further provided with an auxiliary friction part, and the brake friction disc is movably mounted on the brake shaft via a spline, with one side corresponding to the brake piston and the other side corresponding to the auxiliary friction part.

[0013] Preferably, the braking elastic component is a spring, and there are 8 to 12 springs evenly distributed around the central hole of the braking piston.

[0014] Preferably, the braking elastic component is a leaf spring, and there are 8 to 12 leaf springs evenly distributed around the central hole of the brake piston.

[0015] Preferably, the middle and tail ends of the brake shaft are movably connected to the housing via bearings.

[0016] Preferably, friction pads are provided on both sides of the brake friction disc.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention relates to a mixing truck tank drive device with a safety device. In the event of a power outage, the safety device can apply braking force to the mixing tank to prevent it from rotating or swaying under the action of external forces, thereby increasing its safety. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a cross-sectional view of the safety device of this utility model in the unbraked state;

[0022] Figure 3 This is a structural cross-sectional view of the safety device of this utility model in the braking state;

[0023] Figure 4 This is a structural cross-sectional view of the safety device of this utility model in the manual release braking state. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0025] Example 1:

[0026] like Figure 1 , Figure 2 , Figure 3 As shown, a mixing truck tank drive device with safety devices includes a motor 1, a reducer 2, and a brake 3.

[0027] The output shaft end of motor 1 meshes with the driven gear of reducer 2 through the output shaft gear. When the output shaft of motor 1 rotates, it drives the driven gear of reducer 2 to rotate. The driven gear is connected to the output shaft of reducer 2, thereby realizing the transmission of power to reducer 2.

[0028] The brake 3 includes: a housing 31 and a brake shaft 32, a brake piston 33, and an electromagnetic coil 34 disposed within the housing 31;

[0029] The middle and tail ends of the brake shaft 32 are movably connected to the housing 31 via bearings, allowing it to rotate freely within the housing 31. One end of the brake shaft 32 is provided with a gear 321, which meshes with the driven gear of the reducer 2. This arrangement is to limit the rotation of the reducer 2 by restricting the rotation of the brake shaft 32. Specifically, when the brake shaft 32 is restricted from rotating, because the gear 321 meshes with the driven gear of the reducer 2, the driven gear is also restricted from rotating, thereby limiting the power output of the reducer 2.

[0030] In this embodiment, the specific structure for restricting the rotation of the brake shaft 32 is as follows: A brake friction disc 322 is provided at the other end of the brake shaft 32, and friction pads are provided on both sides of the brake friction disc 322. A brake piston 33 is provided on the side of the brake shaft 32 where the brake friction disc 322 is located. To ensure uniform application of braking force, the brake piston 33 can be disc-shaped or polygonal, with its central hole concentric with the axis of the brake shaft 32. The brake piston 33 is movably positioned, allowing it to move towards or away from the brake friction disc 322 along the axial direction of the brake shaft 32. Friction protrusions matching the brake friction disc 322 are provided on the side of the brake shaft 32 facing the brake friction disc 322. When braking is required, force is applied to the brake piston 33, causing it to move towards the brake friction disc 322. The friction protrusions contact the friction pads, generating friction and thus restricting the rotation of the brake shaft 32. When releasing the brake, force is applied to the brake piston 33, causing it to move away from the brake friction disc 322. The friction protrusions separate from the friction pads, eliminating friction and allowing the brake shaft 32 to rotate freely.

[0031] Specifically, the structure for applying force to the brake piston 33 is as follows: a plurality of brake elastic components 35 and an electromagnetic coil 34 are provided between the side of the brake piston 33 away from the brake friction disc 322 and the housing. When braking is required, the brake elastic components 35 apply force to the brake piston 33, causing it to move toward the brake friction disc 322; when braking is required, the electromagnetic coil 34 is energized to generate a magnetic force that attracts the brake piston 33. This attraction exceeds the force applied to the brake piston 33 by the brake elastic components 35, thereby causing the brake piston 33 to move away from the brake friction disc 322.

[0032] The braking elastic component 35 described in this embodiment can be a spring, a leaf spring, or any other structure capable of applying elastic force. When it is a spring or leaf spring, generally 8, 10, or 12 are used, evenly distributed around the central hole of the braking piston 33. Experimental data shows that using 8 to 12 springs or leaf springs in this invention can generate a braking force of 80 to 100 N / m, which is sufficient to brake the tank.

[0033] The electromagnetic coil 34 in this embodiment can also be replaced with other force-applying structures, such as hydraulic or pneumatic systems.

[0034] The mixing truck tank drive device with safety features disclosed in this embodiment makes the tank rotation controllable, improving safety. Specifically, it can be divided into the following situations:

[0035] 1. During tank feeding or rapid mixing, the motor outputs positive torque, and the tank rotates or accelerates. If the motor power is suddenly cut off due to a fault, the safety device will brake the tank to prevent it from being out of control under high rotational inertia, thereby protecting the safety of people and objects around the vehicle.

[0036] 2. After the concrete mixer truck tank is unloaded, the tank stops rotating, and the motor outputs reverse torque to overcome the eccentricity caused by the uneven distribution of concrete material inside the tank. However, if the entire vehicle is powered off at this time, there is no force to "lock" the empty tank, and the tank will rotate or swing back and forth, posing a safety risk. At this time, the electromagnetic coil 34 is also de-energized, and the brake piston 33 rubs against the brake friction disc 322 to brake, thereby avoiding such risks.

[0037] 3. When there is accumulated material in the tank that needs to be cleaned, the whole vehicle is in a power-off and stationary state, but the tank is in a free state. When a person enters the tank to clean the material, the tank will swing back and forth, which poses a safety risk to manual operation. At this time, the tank can be braked by the safety device to prevent the tank from swinging back and forth, thereby reducing the safety risk of operation.

[0038] Example 2:

[0039] Based on the above embodiment 1, an auxiliary friction part 37 is provided on the other side of the brake friction disc 322 to enhance the friction braking effect.

[0040] Specifically, the brake friction disc 322 is mounted on the brake shaft 32 with restricted movement. That is, the brake friction disc 322 can move axially along the brake shaft 32, but cannot rotate relative to the brake shaft 32. This structure can be:

[0041] 1. The brake friction disc 322 is movably mounted on the brake shaft 32 via a spline;

[0042] 2. The end cross-section of the brake shaft 32 is not circular; it can be triangular, quadrilateral, polygonal, elliptical, or even irregular in shape. The connecting hole of the brake friction disc 322 is a matching shape with a slightly larger inner diameter.

[0043] All of the above structures can enable the brake friction disc 322 to move along the axial direction of the brake shaft 32, but it cannot rotate relative to the brake shaft 32.

[0044] An auxiliary friction part 37 is provided on the housing 31 on the other side of the brake friction disc 322. When braking is required, a force is applied to the brake piston 33 to make it move toward the brake friction disc 322. The friction protrusions contact the friction pads to generate friction force, and at the same time push the brake friction disc 322 to move toward the auxiliary friction part 37. The friction part 37 also contacts the friction pads to generate friction force, thereby improving the braking effect.

[0045] Example 3:

[0046] like Figure 4 As shown, based on the above embodiment one or embodiment two, a release bolt 36 is also included. The release bolt 36 is threadedly connected to the housing 31, with one end protruding from the housing 31 and having an inner / outer hexagonal shape. The other end is movably connected to the center hole of the brake piston 33, and the end has a limiting part whose outer diameter exceeds the inner diameter of the center hole of the brake piston 33. When manual brake release is required, the release bolt 36 is turned with a wrench. As the release bolt 36 retracts, it moves the brake piston 33 together, releasing the force pressing on the brake friction disc 322, thus realizing the manual brake release function.

[0047] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A mixing truck tank drive device with a safety device, comprising a motor (1) and a reducer (2), characterized in that: It also includes the brake (3); The brake (3) includes: a housing (31) and a brake shaft (32), a brake piston (33), and an electromagnetic coil (34) disposed within the housing (31); The brake shaft (32) is rotatably disposed inside the housing (31). One end of the brake shaft (32) is provided with a gear (321), which meshes with the driven gear of the reducer (2). The other end of the brake shaft (32) is provided with a brake friction disc (322). The brake piston (33) is movably disposed inside the housing (31), with one side matching the brake friction disc (322), and the other side having several brake elastic components (35) and electromagnetic coils (34) between it and the housing.

2. The mixer truck tank drive device with safety device as described in claim 1, characterized in that: It also includes a release bolt (36), which is connected to the housing (31) by a thread. One end of the release bolt (36) protrudes outside the housing (31) and is in the shape of an inner / outer hexagon. The other end is movably connected to the center hole of the brake piston (33), and the end is provided with a limiting part whose outer diameter exceeds the inner diameter of the center hole of the brake piston (33).

3. A mixer truck tank drive device with a safety device as described in claim 1 or 2, characterized in that: The housing (31) is also provided with an auxiliary friction part (37). The brake friction disc (322) is movably mounted on the brake shaft (32) via a spline, with one side corresponding to the brake piston (33) and the other side corresponding to the auxiliary friction part (37).

4. The mixer truck tank drive device with safety device as described in claim 3, characterized in that: The braking elastic component (35) is a spring, and there are 8 to 12 springs evenly distributed around the central hole of the braking piston (33).

5. A mixer truck tank drive device with a safety device as described in claim 3, characterized in that: The braking elastic component (35) is a leaf spring, and there are 8 to 12 leaf springs that are evenly distributed around the central hole of the braking piston (33).

6. The mixer truck tank drive device with safety device as described in claim 3, characterized in that: The middle and tail ends of the brake shaft (32) are movably connected to the housing (31) via bearings.

7. A mixer truck tank drive device with a safety device as described in claim 3, characterized in that: Friction pads are provided on both sides of the brake friction disc (322).

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