CN112604569B

CN112604569B - Mining mixer truck

Info

Publication number: CN112604569B
Application number: CN202011578885.5A
Authority: CN
Inventors: 胡鹏填; 魏鹏程; 林铭科; 国清华; 李俊
Original assignee: Hunan Pengxiang Xingtong Automobile Co ltd
Current assignee: Hunan Pengxiang Xingtong Automobile Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2024-09-03
Anticipated expiration: 2040-12-28
Also published as: CN112604569A

Abstract

The invention provides a mining mixer truck, which comprises a chassis, a frame arranged on the chassis, a mixing mechanism and a control system, wherein the mixing mechanism and the control system are arranged on the frame, the mixing mechanism comprises a power device, a mixing drum and a material inlet and outlet unit, the power device is arranged on the frame and connected with the control system, one end of the mixing drum is connected with an output shaft of the power device, the other end of the mixing drum is provided with an inner ring which is rotationally connected with the material inlet and outlet unit, two sides of the frame, which are close to the tail of the truck, are respectively provided with an arc-shaped support column, one end of each arc-shaped support column is connected with the frame, and the other end of each arc-shaped support column is connected with the material inlet and outlet unit through a movable joint. According to the invention, through the flexible connection effect of the arc-shaped support columns and the movable joints, when the inner ring is relatively deviated from the outer ring, the outer ring is driven to perform displacement compensation, so that the inner ring and the outer ring are basically concentric, and the automatic aligning effect is realized; abnormal sound is prevented from being generated due to excessive lamination between the inner ring and the outer ring, the inner ring and the outer ring are damaged, and potential safety hazards are caused.

Description

Mining mixer truck

Technical Field

The invention relates to the technical field of mechanical engineering, in particular to a mining mixer truck.

Background

The mining mixer truck is a mixer truck used for mines and tunnels, a feed inlet and a discharge mechanism (a discharge hole and a discharge cylinder for opening the discharge mechanism) of the existing mixer truck are integrated on a tail cover of the mixer truck, and meanwhile, the tail cover is used for sealing a tank body of the mixer truck to prevent the tank body from being exposed, so that feed liquid is evaporated or exposed; the inner ring is connected to a stirring cylinder of the vehicle body through a bolt and rotates along with the stirring cylinder to serve as a movable side whole; the tail cover is connected to the outer ring, and the tail cover and the outer ring form a feeding and discharging unit as a static side whole, so that rotary seal is formed; and a gap exists between the tail cover and the front of the inner ring, and the sealing of the feeding and discharging materials is mainly carried out by fitting a sealing ring on the inner side of the tail cover on the inner ring of the tank body to seal. Because manufacturing tolerance or the mixing drum can deform during no-load and full-load, or the inner ring can shift in the rotation process of the inner ring, the axial leads of the inner ring and the outer ring are not overlapped, if the outer ring cannot be adjusted to follow the inner ring to carry out compensation movement, the outer ring and the inner ring are excessively attached, a sealing element can be excessively extruded to damage a sealing ring, the outer ring can be driven to rotate circumferentially, or abnormal sound is generated, and even a rotating device is damaged; in the prior art, a plurality of slewing devices exist, after the end cover and the sealing slip ring are worn, the extruded O-shaped rubber ring can compensate gaps generated by friction through elastic deformation, so that the fit degree of the sealing piece and the end cover is ensured; however, the sealing slip ring cannot be protected, and the slip ring needs to be replaced after long-term use; the floating circumferential stop mechanism is used for performing circumferential stop on the outer ring and preventing the outer ring from moving circumferentially; however, the sealing slip ring is only used as a substitute for the wearing article, but the sealing slip ring cannot be protected, and the slip ring needs to be replaced after long-term use; the floating circumferential stop mechanism prevents the outer ring from rotating circumferentially through the form of the limit groove and the bulge, only can prevent the outer ring from being driven by the inner ring to rotate circumferentially, but cannot offset and compensate the axial lead of the outer ring, namely cannot adjust the position of the outer ring to compensate the displacement of the inner ring, or can enable the outer ring to be excessively attached to the inner ring locally so as to generate abnormal sound, and cannot substantially protect the sealing element, so that the sealing element is excessively extruded locally and even damaged.

Moreover, the requirements for the adaptability of the chassis and the driving system are relatively high because the vehicle is required to run on a rugged road; in order to ensure that the overall layout is more stable, the layout of the frame is also required, most of agitating trucks in the prior art adopt a two-drive mode, low-speed large torque cannot be realized, and the operation is not flexible enough; the steering is performed in a front wheel steering or frame hinging mode, so that the steering turning radius is larger, and the driving operation is inconvenient; in addition, most of the existing mining agitating lorries adopt four-point support or suspension of front and rear axles, the front and rear axles and a frame are rigidly connected in a four-point support mode, the front and rear axles cannot swing up and down, and the adaptability to the ground is poor; if four-point suspension is adopted, the structure is complex, and the manufacturing cost is high.

Disclosure of Invention

The invention provides a mining mixer truck, which aims to solve the problems that the axial lead of an outer ring cannot be offset-compensated, namely the position of the outer ring cannot be adjusted to compensate the displacement of an inner ring, or abnormal sound is generated due to the fact that the outer ring and the inner ring are partially and excessively attached. The mining mixer truck can prevent abnormal sound caused by local excessive lamination between the outer ring and the inner ring.

In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a mining mixer truck, includes the chassis, locates frame on the chassis and locate rabbling mechanism and control system on the frame, rabbling mechanism includes power device, churn and business turn over material unit, power device installs on the frame and with control system connects, the one end of churn with power device's output shaft, the other end install with the inner circle that business turn over material unit rotates to be connected, the both sides that the frame is close to the car tail are equipped with an arc support column respectively, the business turn over material unit is located two between the arc support column, arc support column one end is connected on the frame, the other end through the movable joint that is equipped with the business turn over material unit is connected.

Further, the feeding and discharging unit comprises an outer ring and a sealing tail cover, the circumferential outer wall of the inner ring is rotationally connected with the circumferential inner wall of the outer ring, the sealing tail cover is connected to one end face of the outer ring, which faces away from the stirring cylinder, through a connecting bolt, and a feed hopper, a discharge mechanism and two cross beams which are used for respectively connecting the movable joints are arranged on one end face of the sealing tail cover, which faces away from the stirring cylinder; the movable joint comprises a pin shaft and pin holes respectively formed in the relative positions of the cross beam and the arc-shaped support columns, the pin shaft is sequentially and movably arranged in the pin holes in the relative positions of the cross beam and the arc-shaped support columns in a penetrating mode, the inner diameter size of the pin holes is larger than the outer diameter size of the pin shaft, a limiting part is further arranged at one end of the pin shaft penetrating out of the pin holes in the arc-shaped support columns, and a movable distance exists between the limiting part and the lower end faces of the arc-shaped support columns.

Further, a gap exists between one end face, close to the inner ring, of the sealing tail cover and the end face of the inner ring, at least 1 sealing piece is arranged in the gap, a plurality of adjusting screws used for preventing the sealing piece from being excessively extruded are further inserted into one end face, close to the sealing tail cover, of the outer ring in the radial direction, protruding portions are reserved on the outer ring of the adjusting screws, and the protruding portions are in contact with the sealing tail cover.

Further, the chassis includes actuating mechanism, front axle and rear axle, the front wheel is installed at front axle both ends, the rear wheel is installed at rear axle both ends, the front axle is through two front axle fixing bases that are equipped with respectively at its both ends connect the frame, the rear axle is through the rear axle fixing base that its middle part is equipped with connect the frame, actuating mechanism respectively with front axle and rear axle transmission are connected.

Further, the driving mechanism comprises a walking motor, a front transmission shaft, a gearbox and a rear transmission shaft, wherein the walking motor is connected with the gearbox, the gearbox is respectively connected with one end of the front transmission shaft and one end of the rear transmission shaft, the other end of the front transmission shaft is connected with the front axle, and the other end of the rear transmission shaft is connected with the rear axle.

Further, the chassis further comprises a front steering hydraulic cylinder and a rear steering hydraulic cylinder, the front steering hydraulic cylinder is in driving connection with the front axle, the rear steering hydraulic cylinder is in driving connection with the rear axle, and the front steering hydraulic cylinder and the rear steering hydraulic cylinder are connected and communicated through an oil way control mechanism; the front steering hydraulic cylinder and the rear steering hydraulic cylinder are double-rod double-acting hydraulic cylinders, and piston rods at two ends of the front steering hydraulic cylinder are respectively connected with two ends of the front axle; and piston rods at two ends of the rear steering hydraulic cylinder are respectively connected with two ends of the rear axle.

Further, at least 3 positioning holes are formed in the outer ring along the radial direction, the positioning holes are uniformly distributed on one end face, close to the sealing tail cover, of the outer ring, internal threads matched with the adjusting screw are formed in the positioning holes, and the adjusting screw is in threaded connection with the positioning holes of the outer ring.

Further, the feeding and discharging unit further comprises an adjusting spring, the adjusting spring is sleeved on the rod portion of the connecting bolt, one end of the adjusting spring is contacted with one end face, opposite to the outer ring, of the sealing tail cover, and the other end of the adjusting spring is contacted with the cap end of the connecting bolt.

Further, the two sides of the frame, which are close to the tail of the vehicle, are respectively provided with an elastic compensation component, each elastic compensation component comprises a support bracket, a reset spring and a support, each support bracket is connected to the circumferential outer wall of the outer ring, each support bracket is mounted on the frame, and one end of each reset spring is connected with each support bracket, and the other end of each reset spring is connected with each support bracket.

Preferably, the number of the sealing elements is 3, 3 sealing grooves are formed in the end face, close to the inner ring, of the sealing tail cover, and the sealing elements are respectively embedded in the sealing grooves.

Compared with the prior art, the beneficial effects are that:

1. According to the invention, through the flexible connection effect of the arc-shaped support columns and the movable joints, when the inner ring is relatively deviated from the outer ring, the outer ring is driven to perform displacement compensation, so that the inner ring and the outer ring are basically concentric, and the automatic aligning effect is realized; abnormal sound caused by excessive bonding between the inner ring and the outer ring is prevented, the inner ring and the outer ring are damaged, and potential safety hazards of operation are caused; the circumferential movement of the outer ring can also be stopped.

2. The invention also increases the supporting of the adjusting screw rods against the sealing tail cover, and the evenly distributed adjusting screw rods keep the clearance balance, so that the clearance balance between the sealing tail cover and the inner ring can be adjusted, the sealing element is prevented from being damaged due to local excessive extrusion, and the sealing element is further protected; the invention can protect the whole rotary device of the feeding and discharging port, ensure the operation safety and prolong the service life of the device.

3. The front axle and the rear axle are supported by three points, and the rear axle can swing up and down around the axis of the rear axle fixing seat for a certain range, so that two rear wheels on the rear axle can float up and down for a certain range; the ground is better adapted; compared with four-point suspension, the three-point support structure is simpler and the cost is lower; the invention adopts a front-back four-wheel drive mode, has smaller turning radius and more flexible operation, and can better adapt to the condition of the road with poor road condition.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a schematic view of the structure of the mixing drum and the frame of the present invention.

FIG. 3 is a schematic illustration of the structure at the tail of the mixer truck of the present invention.

Fig. 4 is a schematic view of the structure of the movable joint in the present invention.

Fig. 5 is a schematic view of the structure of the outside of the feeding and discharging unit in the present invention.

FIG. 6 is a schematic view of the junction of the inner ring and the outer ring in the present invention.

Fig. 7 is a schematic view of the invention at the adjusting screw.

Fig. 8 is a schematic structural diagram of embodiment 2 and embodiment 3.

Fig. 9 is a schematic structural view of the elastic compensation assembly in embodiment 2 and embodiment 3.

Fig. 10 is a schematic structural view of embodiment 4.

Fig. 11 is a schematic view of the structure of the chassis in the present invention.

Fig. 12 is a schematic view of the oil passage connection of the front steering cylinder and the rear steering cylinder in the present invention.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent.

In the description of the present invention, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", "long", etc., that are oriented or positional relationships based on the orientation or general positional relationships shown in the drawings, it is merely for convenience of describing the present invention and simplifying the description, rather than indicating or implying that the apparatus or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration and should not be construed as limiting the present patent, and that it is possible for those of ordinary skill in the art to understand the specific meaning of the terms described above according to the specific circumstances.

Example 1

As shown in fig. 1, fig. 2, fig. 6 and fig. 11, a mining mixer truck comprises a chassis 300, a frame 301 arranged on the chassis 300, and a mixing mechanism and a control system arranged on the frame 301, wherein the mixing mechanism comprises a power device 400, a mixing drum 109 and a feeding and discharging unit 200, the power device 400 is arranged on the frame 301 and is connected with the control system, one end of the mixing drum 109 is connected with an output shaft of the power device 400, the other end of the mixing drum 109 is provided with an inner ring 101 rotationally connected with the feeding and discharging unit 200, the left side and the right side of the frame 301 close to the tail are respectively provided with 1 arc-shaped supporting columns 201, the feeding and discharging unit 200 is positioned between 2 arc-shaped supporting columns 201, one end of each arc-shaped supporting column 201 is connected with the frame 301, and the other end of each arc-shaped supporting column 201 is connected with the feeding and discharging unit 200 through a movable joint arranged. The power unit 400 generally comprises a stirring motor and a speed reducer, wherein the speed reducer is connected with the stirring cylinder 109, and can also be directly connected with the stirring cylinder 109 through the stirring motor.

As shown in fig. 2,3, 5, 6 and 7, the feeding and discharging unit 200 includes an outer ring 102 and a sealing tail cap 103, the circumferential outer wall of the inner ring 101 is rotationally connected with the circumferential inner wall of the outer ring 102, the sealing tail cap 103 is connected to an end surface of the outer ring 102 opposite to the stirring cylinder 109 through a connecting bolt 107, and the connecting bolt 107 is connected to a connecting nut 108 on the inner end surface of the outer ring; a feed hopper 115 is arranged above one end surface of the sealing tail cover 103, which faces away from the stirring barrel 109, a discharging mechanism 116 is arranged below the sealing tail cover, and 1 cross beams 202 for respectively connecting the movable joints are respectively arranged on the left side and the right side of the sealing tail cover; the discharging mechanism 116 comprises a discharging hole, a discharging door covered on the discharging hole and a door opening oil cylinder for controlling the opening and closing of the discharging door; as shown in fig. 4, the movable joint 203 includes a pin shaft 204 and pin holes 205 respectively formed at opposite positions of the cross beam 202 and the arc-shaped support column 201, the pin shaft 204 is sequentially and movably inserted into the pin holes 205 formed at opposite positions of the cross beam 202 and the arc-shaped support column 201, an inner diameter dimension of the pin holes 205 is larger than an outer diameter dimension of the pin shaft 204, a limiting member 206 is further mounted at one end of the pin shaft 204, which is inserted out of the pin holes 205 formed in the arc-shaped support column 201, and a movable space exists between the limiting member 206 and a lower end surface of the arc-shaped support column 201; the pin holes 205 may be waist-shaped holes, and the length and width of the waist-shaped holes are larger than the outer diameter of the pin 204; the outer ring 102 is radially provided with 6 positioning holes, the positioning holes are uniformly distributed on one end face of the outer ring 102, which is close to the sealing tail cover 103, the positioning holes are internally provided with adjusting screws 106, the positioning holes are internally provided with internal threads matched with the adjusting screws 106, and the adjusting screws 106 are in threaded connection with the positioning holes of the outer ring 102.

In this embodiment, fixed arc-shaped support columns 201 are arranged on the left and right sides of the frame 301 near the tail of the vehicle, and the opening of the stirring barrel 109, the inner ring 101 and the feeding and discharging unit 200 are all located between the two arc-shaped support columns 201; as shown in fig. 5 and 7, the inner ring 101 is fixed to the opening of the stirring cylinder 109 by a connecting flange 110, and rotates together with the stirring cylinder 109, and in the turning device, serves as a movable end; the feeding and discharging unit 200 is arranged on the inner ring 101 as a fixed whole cover, and seals the stirring cylinder 109 to prevent evaporation of water and leakage of slurry; the feeding and discharging unit 200 cannot rotate, and when the inner ring 101 serving as a fixed end and the movable end of the inner ring 101 follow the stirring cylinder 109 to rotate around the axial lead of the outer ring 102, the sealing tail cover 103 always seals the opening of the inner ring 101 through a sealing piece, so that slurry leakage is prevented; a hopper 115 and a discharge mechanism 116 (typically a discharge port, a discharge cover and a discharge cylinder) of the mixer are both arranged on the feeding and discharging unit 200; this is the prior art and will not be described in detail.

In an ideal situation, the axial lines of the inner ring 101 and the outer ring 102 are basically coincident, so that excessive lamination and friction damage of the inner ring 101 and the outer ring 102 cannot occur, and abnormal sound and even damage of the slewing device are generated; however, since the stirring cylinder 109 is deformed in both the unloaded and fully loaded states, the position of the inner ring 101 is shifted, and the outer ring 102 can be compensated for following the shift of the inner ring 101 by adopting the scheme in the present embodiment. The specific action principle is as follows: one end of the beam 202 is fixedly connected to the seal, and the other end is flexibly connected (the flexible connection refers to that the beam can move within a certain range) to the arc-shaped support column 201; the flexible connection is mainly realized by a movable joint 203 by taking the direction of the head of the vehicle as the front, and in the movable joint 203, a certain movable space is formed in the up-down direction of the pin 204 due to the space between the limiting piece 206 of the pin 204 and the lower end surface of the arc-shaped supporting column 201; in addition, the inner diameter of the pin shaft 204 is smaller than the length and width of the kidney-shaped hole, so that the pin shaft 204 is not completely restrained in the kidney-shaped hole, and the pin shaft 204 can move a certain distance back and forth and left and right in the kidney-shaped hole, so that the cross beam 202 has a certain moving space in the up-down, left-right and front-back directions; the sealing tail cover 103 is fixedly connected with the cross beam 202, the outer ring 102 and the sealing tail cover 103 are connected into a whole through the connecting bolt 107, the whole feeding and discharging unit 200 is a whole, the feeding and discharging unit 200 is not completely fixed relative to the inner ring 101 due to the action of the movable joint 203, and can float a certain range up and down, front and back and left and right to compensate, so that the outer ring 102 cannot overconstrain the inner ring 101, abnormal sound and even damage to the slewing device due to excessive lamination and excessive friction between the outer ring 102 and the inner ring 101 can be avoided, the whole slewing device can be protected, the operation safety is ensured, and the service life of the device is prolonged.

As shown in fig. 6 and 7, a gap 104 exists between one end surface of the sealing tail cover 103, which is close to the inner ring 101 and the outer ring 102, and the end surface of the inner ring 101, at least 1 sealing element 105 is arranged in the gap 104, a plurality of adjusting screws 106 for preventing the sealing element 105 from being excessively extruded are further inserted into one end surface of the outer ring 102, which is close to the sealing tail cover 103, in the radial direction, the adjusting screws 106 leave a protruding part on the outer ring 102, and the protruding part is contacted with the sealing tail cover 103; the inner ring 101 is connected to the mounting flange 110 of the stirring cylinder 109 by the inner ring bolt 112, and a gasket 111 is further provided between the mounting flange 110 and the inner ring 101, so that the inner ring bolt 112 is inserted into the end surface of the inner ring 101 from the stirring cylinder 109 side in the radial direction and does not pass through the other end surface of the inner ring 101 in order to prevent the inner ring bolt 112 from interfering with the sealing member 105. In this embodiment, the number of the sealing elements 105 is 3, the end surface of the sealing tail cap 103, which is close to the inner ring 101, is provided with 3 sealing grooves, and the sealing elements 105 are respectively embedded in the sealing grooves. In the embodiment, 3 seals are arranged, so that the sealing effect is better, the sealing replacement period is prolonged, and all the 3 seals can be replaced after being damaged.

In the turning device of the mixer truck, after the sealing tail cover 103 is covered, a gap 104 exists between the inner end face of the sealing tail cover 103 and the inner ring 101, and a certain distance exists between the inner end face of the sealing tail cover 103 and the outer ring 102, in order to keep the sealing gap 104 for placing the sealing element 105 between the inner ring 101 and the tail cover 103 and keep a certain adjusting space when the connecting bolt 107 connects the sealing tail cover 103 and the outer ring 102, the distance between the sealing tail cover 103 and the outer ring 102 cannot be directly filled by changing the thickness of the outer ring 102.

Without the adjustment screw 106, if the connection bolt 107 is excessively screwed when the connection bolt 107 is in cooperation with the connection nut 108 to connect the seal tail cover 103 and the outer ring 102, the seal 105 may be excessively extruded, resulting in rapid damage to the seal 105; often worse seals 105 are required. During the rotation of the inner ring 101 following the stirring cylinder 109, the stirring cylinder 109 deforms when empty or fully loaded, which also causes the inner ring 101 to shift in position, resulting in uneven gap 104 and partial overpressure of the sealing member 105 to damage the sealing member.

Another key point of this embodiment is that a circle of adjusting screw 106 is added on the end face of the outer ring 102, and since the protruding portion (cap end) of the adjusting screw 106 can rigidly support against the sealing tail cover 103, the sealing tail cover 103 excessively presses the sealing element 105 due to the fact that the connecting bolt 107 is screwed too tightly, and the adjusting screw 106 is uniformly distributed on the outer ring 102, the adjusting screw 106 can play a role of keeping the gap 104 balanced and uniform, further, the sealing element 105 is prevented from being excessively pressed to be damaged, the number of times of replacing the sealing element 105 can be reduced, and slurry leakage due to damage of the sealing element 105 is prevented.

As shown in fig. 11, the chassis 300 includes a driving mechanism, a front axle 320 and a rear axle 330, wherein front wheels 302 are mounted at two ends of the front axle 320, rear wheels 303 are mounted at two ends of the rear axle 330, the front axle 320 is connected with the frame 301 through two front axle fixing seats 321 respectively provided at two ends of the front axle 320, the rear axle 330 is connected with the frame 301 through a rear axle fixing seat 331 provided at the middle of the rear axle 330, and the driving mechanism is in transmission connection with the front axle 320 and the rear axle 330 respectively; the driving mechanism comprises a traveling motor 314, a front transmission shaft 316, a gearbox 315 and a rear transmission shaft 317, wherein the traveling motor 314 is connected with the gearbox 315, the gearbox 315 is respectively connected with one end of the front transmission shaft 316 and one end of the rear transmission shaft 317, the other end of the front transmission shaft 316 is connected with the front axle 320, and the other end of the rear transmission shaft 317 is connected with the rear axle 330. In this embodiment, as in the prior art, the power of the walking motor 314 is provided by the engine of the mixer truck, and the front axle 320 on the chassis 300 is rigidly connected with the frame 301 through two front axle fixing seats 321, i.e. has 2 supporting points; the rear axle 330 is connected with the frame 301 only through one rear axle fixing seat 331, namely, only one supporting point exists, so that the rear axle 330 can swing up and down around the axis of the rear axle fixing seat 331 for a certain range, and both rear wheels 303 on the rear axle 330 can float up and down for a certain range; the ground is better adapted; compared with four-point suspension, the three-point support structure is simpler and the cost is lower; in addition, in this embodiment, the running motor 314 transmits power to the gearbox 315, and the gearbox 315 drives the front axle 320 and the rear axle 330 via the front transmission shaft 316 and the rear transmission shaft 317 respectively to complete the running action; by adopting the front and rear four-wheel drive mode, the turning radius is smaller, and the operation is more flexible.

As shown in fig. 11 and 12, the chassis 300 further includes a front steering hydraulic cylinder 318 and a rear steering hydraulic cylinder 319, the front steering hydraulic cylinder 318 is in driving connection with the front axle 320, the rear steering hydraulic cylinder 319 is in driving connection with the rear axle 330, and the front steering hydraulic cylinder 318 and the rear steering hydraulic cylinder 319 are connected and communicated through an oil path control mechanism; the front steering hydraulic cylinder 318 and the rear steering hydraulic cylinder 319 are dual-rod double-acting hydraulic cylinders, and piston rods at two ends of the front steering hydraulic cylinder 318 are respectively connected with two ends of the front axle 320; the piston rods at both ends of the rear steering cylinder 319 are connected to both ends of the rear axle 330, respectively. the embodiment also adopts a steering system with switchable 2-wheel steering and 4-wheel steering, and is specific: the chassis 300 further comprises a front steering hydraulic cylinder 318 and a rear steering hydraulic cylinder (the arrangement mode is consistent with that of the front steering hydraulic cylinder, not shown in fig. 11), the front steering hydraulic cylinder 318 is in driving connection with a front axle 320, the rear steering hydraulic cylinder 319 is in driving connection with a rear axle 330, and the front steering hydraulic cylinder 318 and the rear steering hydraulic cylinder 319 are connected and communicated through an oil way control mechanism as shown in fig. 12; the front steering hydraulic cylinder 318 and the rear steering hydraulic cylinder 319 are double-rod double-acting hydraulic cylinders, and piston rods at two ends of the front steering hydraulic cylinder 318 are respectively connected with two ends of a front axle 320; the piston rods at the two ends of the rear steering hydraulic cylinder 319 are respectively connected with the two ends of the rear axle 330; The cylinder barrel of the front steering hydraulic cylinder 318 is provided with a first oil port and a second oil port at two ends respectively, the cylinder barrel of the rear steering hydraulic cylinder 319 is provided with a third oil port and a fourth oil port at two ends respectively, the oil way control mechanism comprises a front steering control valve 322, a rear steering control valve 323, an oil tank and a hydraulic steering device 324 for connecting a steering wheel, the first oil port and the second oil port are connected with the front steering control valve 322, the third oil port and the fourth oil port are connected with the rear steering control valve 323, the front steering control valve 322 and the rear steering control valve 323 are connected with one end of the hydraulic steering device 324 through pipelines, and the other end of the hydraulic steering device 324 is connected with the oil tank; The front steering control valve 322 and the rear steering control valve 323 are both M-type three-position four-way solenoid valves. As shown in fig. 12, a hydraulic lock 325 is further provided on the oil path of the rear steering cylinder 319, so as to prevent the rear wheel 303 from being biased somewhat by the internal leakage of the rear steering control valve 323 when the front wheel 302 is individually steered, and the vehicle is turned off somewhat; the hydraulic steering 324 controls steering of the front wheels 302 and the rear wheels 303 through 2 steering control valves, for example: when the front steering control valve 322 is at the left position and the rear steering control valve 323 is at the middle position, the front wheel 302 turns left and the rear wheel 303 is not moved; when the front steering control valve 322 is in the left position and the rear steering control valve 323 is in the left position, the front wheel 302 turns left and the rear wheel 303 turns left; When the front steering control valve 322 is in the right position and the rear steering control valve 323 is in the middle position, the front wheels 302 turn right and the rear wheels 303 are not moved; when the front steering control valve 322 is in the right position and the rear steering control valve 323 is in the right position, the front wheels 302 are turned right and the rear wheels 303 are also turned right; by changing the hydraulic circuit, the independent steering of the front and rear wheels is realized, and when the rear wheels 303 are steered and the front wheels 302 are not steered, the running direction is horizontally rotated by 180 degrees, so that the direct steering without turning can be realized; the steering control system connected with the steering wheel ensures that the turning angle of the tire can be freely controlled during steering; the median signal of the tire is increased, the tire needs to return to the median when the tire is changed from turning to non-turning, and the situation that the deviation occurs is avoided to influence the actual operation.

Example 2

This embodiment is similar to embodiment 1, except that:

As shown in fig. 8 and 9, in this embodiment, 1 elastic compensation assembly 207 is further disposed on the left and right sides of the frame 301 near the tail of the vehicle, where the elastic compensation assembly 207 includes a support bracket 208, a return spring 209, and a support 210, the support bracket 208 is connected to the circumferential outer wall of the outer ring 102, the support 210 is mounted on the frame 301, and one end of the return spring 209 is connected to the support bracket 208, and the other end is connected to the support 210.

The elastic compensation assembly 207 supports the whole feeding and discharging unit 200 in the vertical direction, and further automatically aligns the outer ring 102 and the whole feeding and discharging unit 200 by the action of the upward and downward elastic force of the spring 209 and the flexibility of the spring 209 in the front-back and left-right directions, and can stop the circumferential movement of the outer ring 102 due to the circumferential limiting action of the supporting bracket 208.

Example 3

This embodiment is similar to embodiment 1, except that:

unlike embodiment 2, as shown in fig. 8 and 9, in this embodiment, as an alternative to the arc-shaped support column 201 and the movable joint 203 in embodiment 1 being used as a centering structure, two sides of the vehicle frame 301 near the vehicle tail are respectively provided with 1 elastic compensation assembly 207, the elastic compensation assembly 207 includes a support bracket 208, a return spring 209 and a support saddle 210, the support bracket 208 is connected to the circumferential outer wall of the outer ring 102, the support saddle 210 is mounted on the vehicle frame 301, and one end of the return spring 209 is connected to the support bracket 208, and the other end is connected to the support saddle 210; in this embodiment, one side of the seal tail cap 103 is also connected to the outer ring 102 by a hinge 211, which facilitates opening the seal tail cap 103 and replacement of the seal.

The elastic compensation assembly 207 supports the whole feeding and discharging unit 200 in the vertical direction, and can automatically center the outer ring 102 and the whole feeding and discharging unit 200 by the action of the up-down elastic force of the spring 209 and the flexibility of the spring 209 in the front-back and left-right directions, and can stop the circumferential movement of the outer ring 102 due to the circumferential limiting action of the supporting bracket 208.

Example 4

This embodiment is similar to embodiment 1, except that:

As shown in fig. 10, the feeding and discharging unit further includes an adjusting spring 113, the adjusting spring 113 is sleeved on the rod portion of the connecting bolt 107, one end of the adjusting spring 113 contacts with one end surface of the sealing tail cover 103 opposite to the outer ring 102, and the other end contacts with the cap end of the connecting bolt 107.

The adjusting spring 113 is used for adjusting the balance of the gap 104, and can play a role in buffering and compensating the abrasion loss of the sealing element 105 to a certain extent when the connecting bolt 107 is excessively screwed or the position of the inner ring 101 is slightly deviated; in actual use, the connecting bolts 107 provided with the adjusting springs 113 may be all or part, depending on the specific situation, but all the connecting bolts 107 provided with the adjusting springs 113 are uniformly distributed to play a role in adjusting gap balance.

It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims

1. The mining mixer truck comprises a chassis (300), a frame (301) arranged on the chassis (300), a mixing mechanism and a control system, wherein the mixing mechanism and the control system are arranged on the frame (301), the mixing mechanism comprises a power device, a mixing drum (109) and a feeding and discharging unit (200), the power device is arranged on the frame (301) and is connected with the control system, one end of the mixing drum (109) is connected with an output shaft of the power device, the other end of the mixing drum is provided with an inner ring (101) which is rotationally connected with the feeding and discharging unit (200), the mining mixer truck is characterized in that two sides of the frame, which are close to the tail of the truck, are respectively provided with an arc-shaped supporting column (201), The feeding and discharging unit (200) is positioned between the two arc-shaped supporting columns (201), one end of each arc-shaped supporting column (201) is connected to the frame, and the other end of each arc-shaped supporting column is connected with the feeding and discharging unit (200) through a movable joint (203); The feeding and discharging unit (200) comprises an outer ring (102) and a sealing tail cover (103), the circumferential outer wall of the inner ring (101) is rotationally connected with the circumferential inner wall of the outer ring (102), the sealing tail cover (103) is connected to one end face of the outer ring (102) opposite to the stirring cylinder (109) through a connecting bolt (107), and a feed hopper (115), a discharging mechanism (116) and two cross beams (202) which are respectively connected with the movable joint (203) are arranged on one end face of the sealing tail cover (103) opposite to the stirring cylinder (109); The movable joint (203) comprises a pin shaft (204) and pin holes (205) which are respectively formed in the relative positions of the cross beam (202) and the arc-shaped support column (201), the pin shaft (204) is sequentially and movably arranged in the pin holes (205) in the relative positions of the cross beam (202) and the arc-shaped support column (201), the inner diameter size of the pin holes (205) is larger than the outer diameter size of the pin shaft (204), one end of the pin shaft (204) penetrating out of the pin holes (205) on the arc-shaped support column (201) is also provided with a limiting piece (206), and a movable distance exists between the limiting piece (206) and the lower end face of the arc-shaped support column (201); A gap (104) exists between one end surface of the sealing tail cover (103) close to the inner ring (101) and one end surface of the outer ring (102) and the end surface of the inner ring (101), at least 1 sealing piece (105) is arranged in the gap (104), a plurality of adjusting screws (106) for preventing the sealing piece (105) from being excessively extruded are further inserted into one end surface of the outer ring (102) close to the sealing tail cover (103) along the radial direction, a protruding part is reserved on the outer ring (102) by the adjusting screws (106), and the protruding part is contacted with the sealing tail cover (103); The chassis (300) comprises a driving mechanism, a front axle (320) and a rear axle (330), wherein front wheels (302) are arranged at two ends of the front axle (320), rear wheels (303) are arranged at two ends of the rear axle (330), the front axle (320) is connected with the frame (301) through two front axle fixing seats (321) respectively arranged at two ends of the front axle, the rear axle (330) is connected with the frame (301) through a rear axle fixing seat (331) arranged at the middle part of the rear axle, and the driving mechanism is respectively in transmission connection with the front axle (320) and the rear axle (330); at least 3 positioning holes are formed in the outer ring (102) in the radial direction, the positioning holes are uniformly distributed on one end face, close to the sealing tail cover (103), of the outer ring (102), internal threads matched with the adjusting screw (106) are formed in the positioning holes, and the adjusting screw (106) is in threaded connection with the positioning holes of the outer ring (102).

2. The mining truck according to claim 1, characterized in that the driving mechanism comprises a traveling motor (314), a front transmission shaft (316), a gearbox (315) and a rear transmission shaft (317), the traveling motor (314) is connected with the gearbox (315), the gearbox (315) is connected with one end of the front transmission shaft (316) and one end of the rear transmission shaft (317), respectively, the other end of the front transmission shaft (316) is connected with the front axle (320), and the other end of the rear transmission shaft (317) is connected with the rear axle (330).

3. The mining truck according to claim 2, characterized in that the chassis (300) further comprises a front steering hydraulic cylinder (318) and a rear steering hydraulic cylinder (319), the front steering hydraulic cylinder (318) is in driving connection with the front axle (320), the rear steering hydraulic cylinder (319) is in driving connection with the rear axle (330), the front steering hydraulic cylinder (318) and the rear steering hydraulic cylinder (319) are in connection and intercommunication through an oil path control mechanism, and the control system is independently connected with the oil path control mechanism; the front steering hydraulic cylinder (318) and the rear steering hydraulic cylinder (319) are double-rod double-acting hydraulic cylinders, and piston rods at two ends of the front steering hydraulic cylinder (318) are respectively connected with two ends of the front axle (320); the piston rods at the two ends of the rear steering hydraulic cylinder (319) are respectively connected with the two ends of the rear axle (330).

4. The mining mixer truck according to claim 2, characterized in that the feeding and discharging unit (200) further comprises an adjusting spring (113), the adjusting spring (113) is sleeved on the rod portion of the connecting bolt (107), one end of the adjusting spring (113) is contacted with one end face of the sealing tail cover (103) opposite to the outer ring (102), and the other end of the adjusting spring is contacted with the cap end of the connecting bolt (107).

5. The mining truck according to claim 1, characterized in that two sides of the frame, which are close to the tail of the truck, are respectively provided with an elastic compensation assembly (207), the elastic compensation assemblies (207) comprise support brackets (208), return springs (209) and supports (210), the support brackets (208) are connected to the circumferential outer wall of the outer ring (102), the supports (210) are mounted on the frame (301), one ends of the return springs (209) are connected to the support brackets (208), and the other ends of the return springs are connected to the supports (210).

6. A mining truck according to claim 3, characterized in that the number of the sealing elements (105) is 3,3 sealing grooves are arranged on the end face of the sealing tail cover (103) close to the inner ring (101), and the sealing elements (105) are respectively embedded in the sealing grooves.