A flat push self-unloading conveying device and a semitrailer

Abstract

This invention discloses a flat-push self-unloading conveyor and a semi-trailer in the field of self-unloading conveyor devices, aiming to solve the problem of short service life of existing self-unloading conveyors due to wear. The flat-push self-unloading conveyor is installed in the truck body and includes: a flat-push plate, a conveyor belt, a rear roller, a transmission mechanism, and a hydraulic transmission device. The flat-push plate is connected to the conveyor chain assembly and the conveyor belt. The conveyor chain assembly is connected to the hydraulic transmission device through the transmission mechanism and drives the conveyor chain assembly, thereby driving the flat-push plate to move. The conveyor belt and the conveyor chain assembly are not in contact, which effectively protects the conveyor belt from friction damage. The conveyor belt does not need to be wound, and the bottom of the conveyor belt can be kept dry and clean, avoiding the gradual increase of the running resistance of the flat-push plate. The flat-push plate moves horizontally by the tension provided by the bottom conveyor chain assembly, so that the conveyor belt is basically not under tension, which can improve the service life and stability of the belt.

Description

Technical Field

[0001] This invention relates to the field of self-unloading conveying devices, and more particularly to a horizontal self-unloading conveying device and a semi-trailer. Background Technology

[0002] Currently, the structure of push-pull dump trucks on the market uses a rear-mounted drive roller to wind the conveyor belt, driving the push plate to move horizontally for unloading. The push plate returns to its original position mainly by being dragged by a wire rope. This has the following shortcomings: the conveyor belt needs to provide a tension greater than the running resistance of the push plate. Over time, the conveyor belt will become longer and longer, weakening its tensile strength and ultimately reducing its service life; asphalt, gravel particles, mud, sewage, etc., adhering to the conveyor belt will become thicker and thicker. If not cleaned in time, this will not only increase the friction coefficient at the bottom of the conveyor belt, but also accelerate the wear at the bottom of the conveyor belt; the wire rope will suffer from metal fatigue and breakage after frequent and repeated bending and stretching, resulting in a short service life. Summary of the Invention

[0003] The purpose of this invention is to provide a flat-push self-unloading conveyor and a semi-trailer, which supports the conveyor belt by setting a frame at the bottom of the carriage, thereby avoiding contact between the belt and the conveyor chain assembly and preventing wear and damage to the conveyor belt.

[0004] To solve the above technical problems, the following technical solution is adopted:

[0005] In a first aspect, the present invention provides a horizontal self-unloading conveyor, wherein the horizontal self-unloading conveyor is disposed inside a vehicle body, characterized in that it comprises:

[0006] The push plate is used to push materials, and its bottom is connected to the conveyor chain assembly;

[0007] The conveyor belt is located outside the conveyor chain assembly and is supported by a frame at the bottom of the carriage. It does not contact the conveyor chain assembly and one end is located on the push plate.

[0008] The rear roller is used for steering the conveyor belt and the conveyor chain assembly;

[0009] The rear roller is provided with several rotatable roller columns. Each roller column is a polygonal frame formed by several round steel pipes. The roller columns are used to install the conveyor belt to achieve its rotation. The rear roller is provided with a grooved wheel, which is used to install the conveyor chain assembly to achieve its rotation. The middle part of the rear roller is also provided with a support bearing for positioning and installing the rear roller. The diameter of the grooved wheel is smaller than the diameter of the roller column.

[0010] A transmission mechanism and a hydraulic transmission device are used to drive the conveyor chain assembly, thereby driving the movement of the conveyor belt and the flat push plate;

[0011] The transmission mechanism is driven by the hydraulic transmission device and includes a drive shaft and a driven shaft. The drive shaft is connected to the hydraulic transmission device and is connected to the driven shaft through a sprocket and a transmission chain. The position of the drive shaft is adjusted by an adjusting bolt, thereby adjusting the tension of the transmission chain.

[0012] The conveyor chain assembly includes two sets of conveyor chains, each conveyor chain comprising a conveying straight chain segment and a dragging straight chain segment, wherein the dragging straight chain segment is a plate chain;

[0013] One end of the dragging straight chain segment is installed on the second tensioning device at the bottom of the flat push plate, and the other end goes around the rear roller to the lower part and is connected to one end of the conveying straight chain segment through the connecting plate. The other end of the conveying straight chain segment goes around the transmission mechanism to the upper part and is connected to the first tensioning device at the bottom of the flat push plate.

[0014] The connecting plate is a corrugated bent plate with several mounting holes. One end of the conveyor belt is mounted on the connecting plate by bolts, and the other end is set on the flat push plate.

[0015] After the hydraulic transmission device is started, it drives the drive shaft to rotate, which in turn drives the driven shaft to rotate through the sprocket and transmission chain. The conveyor chain section set on the sprocket moves accordingly, which in turn drives the flat push plate and the conveyor belt to move.

[0016] Optionally, the bottom of the flat push plate is provided with rollers and nylon blocks, the rollers are lower in the middle and higher on both sides, and the rollers and nylon blocks are both set on the slide rails at the bottom of the carriage to prevent the flat push plate from running off-center;

[0017] The bottom of the push plate is provided with a guide plate to prevent the conveyor chain assembly and conveyor belt from interfering with the push plate.

[0018] Optionally, the two ends of the push plate are provided with rotatable door panels, and rubber scrapers are installed on the door panels. The edges of the door panels are connected to the side walls of the push plate by several parallel tension springs, and the tension springs are tensioned by screws.

[0019] Optionally, the flat push plate is provided with an insulation layer, the insulation layer is filled with insulation material, and several temperature sensors are also installed on the flat push plate, the temperature sensors transmitting temperature data wirelessly.

[0020] Optionally, both the first tensioning device and the second tensioning device include a tensioning rod and a compression spring. One end of the tensioning rod is connected to the conveyor chain, and the other end is connected to the compression spring, which tensions the conveyor chain.

[0021] In a second aspect, the present invention provides a semi-trailer, including the flat-push self-unloading conveyor as described in any of the first aspects, wherein a mechanical limit switch and an electromagnetic limit switch for controlling the start and stop of the flat-push self-unloading conveyor are installed at the front end of the trailer near the cab, wherein the electromagnetic limit switch takes precedence over the mechanical limit switch.

[0022] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0023] 1. The conveyor belt and conveyor chain assembly of this invention do not come into contact, which effectively protects the conveyor belt from friction damage. The conveyor belt does not need to be wound, and the bottom of the conveyor belt can be kept dry and clean, avoiding the gradual increase of the running resistance of the push plate. The push plate moves horizontally by the tension provided by the conveyor chain assembly at the bottom, so that the conveyor belt is basically not under tension, which can improve the service life and stability of the belt.

[0024] 2. The conveyor chain of this invention includes a conveying straight chain segment and a dragging straight chain segment. The conveying straight chain segment is driven by a sprocket, thereby pulling the dragging straight chain segment and the conveyor belt to move, which in turn pulls the flat push plate to move. The dragging straight chain segment uses a plate chain, which can reduce the installation height. The use of a chain is due to its better flexibility and wear resistance than steel wire rope, which can maintain stable performance during long-term use, is not prone to breakage or excessive wear, and improves the service life of the device.

[0025] 3. The present invention also provides an insulation layer and a temperature sensor on the flat push plate. The insulation layer keeps the material warm, and the temperature sensor obtains the internal temperature of the material. The internal temperature of the material can be detected in real time, and corresponding strategies can be made in advance. Attached Figure Description

[0026] Figure 1 This is a side view of the horizontal self-unloading conveyor device in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the side cross-section of the semi-trailer's cargo box in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the transmission mechanism in an embodiment of the present invention;

[0029] Figure 4 This is a three-dimensional schematic diagram of the push plate in an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the bottom roller of the flat push plate in an embodiment of the present invention;

[0031] Figure 6 This is a three-dimensional schematic diagram of the rear roller in an embodiment of the present invention;

[0032] 1. Flat-push self-unloading conveyor; 2. Flat-push plate; 3. Conveyor belt; 4. Conveyor chain assembly; 5. Rear roller; 6. Transmission mechanism; 7. Hydraulic transmission device; 8. Drive shaft; 9. Driven shaft; 10. Sprocket; 11. Transmission chain; 12. Adjusting bolt; 13. Material; 14. Roller; 15. Nylon block; 16. First tensioning device; 17. Second tensioning device; 18. Slide rail; 19. Door panel; 20. Rubber scraper; 21. Tension spring; 22. Screw; 23. Tensioning rod; 24. Compression spring; 25. Conveyor straight chain section; 26. Dragging straight chain section; 27. Connecting plate; 28. Guide plate; 29. ​​Grooved wheel; 30. Roller column; 31. Support bearing; 32. Insulation layer; 33. Temperature sensor; 34. Mechanical limit switch; 35. Electromagnetic limit switch. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Example 1

[0034] like Figure 1 , Figure 2 As shown, this embodiment provides a horizontal self-unloading conveyor 1, which is installed inside a vehicle compartment and includes:

[0035] The flat push plate 2 is used to push the material 13, and its bottom is connected to the conveyor chain assembly 4.

[0036] The conveyor belt 3 is located outside the conveyor chain assembly 4 and is supported by a frame inside the carriage. It does not contact the conveyor chain assembly and one end is located on the flat push plate 2.

[0037] The rear roller 5 is used for steering the conveyor belt 3 and the conveyor chain assembly 4.

[0038] The transmission mechanism 6 is used to drive the conveyor chain assembly 4, thereby driving the flat push plate 2 to push the material 13.

[0039] like Figure 2As shown, one end of the conveyor chain assembly winds from the lower part of the rear roller 5 to the upper part and connects to the bottom of the flat push plate 2, while the other end winds from the lower part of the transmission mechanism 6 to the upper part and connects to the bottom of the flat push plate 2. One end of the conveyor belt 3 is connected to the end of the flat push plate 2, and the other end winds around the rear roller 5 and connects to the middle of the lower part of the conveyor belt assembly. The conveyor belt 3 is supported by the frame at the bottom of the carriage. The conveyor belt 3 does not contact the conveyor chain assembly 4, thus avoiding wear on the conveyor belt 3. The conveyor chain assembly 4 is driven by the transmission mechanism, which in turn drives the conveyor belt 3 and the flat push plate 2 to move, thereby pushing the material 13. Example 2

[0040] This embodiment provides a horizontal self-unloading conveyor device 1 based on Embodiment 1, with the following differences:

[0041] like Figure 1 , Figure 4 As shown, the push plate 2 has a right-angled triangular structure, and the material 13 is moved by the inclined surface of the right-angled triangle. An insulation layer 32 is provided on the inner side of the inclined surface, filled with insulation material to keep the material 13 warm and store it. Several temperature sensors 33 are also installed on the push plate 2. These temperature sensors 33 transmit the internal temperature data of the material 13 wirelessly, allowing for timely adjustments to subsequent strategies.

[0042] like Figure 4 , Figure 5 As shown, four rollers 14 and four nylon blocks 15 are distributed at the bottom of the flat push plate 2. The four rollers 14 are evenly distributed at the bottom of the flat push plate 2, and the nylon blocks 15 are set on the inner side of the rollers 14. The rollers 14 have a structure that is low in the middle and high on both sides. Both the rollers 14 and the nylon blocks 15 are set on the slide rail 18 to prevent the flat push plate 2 from running off-center. The slide rail 18 is set at the bottom of the carriage.

[0043] like Figure 1 As shown, the bottom of the flat push plate 2 is provided with a guide plate 28. The guide plate 28 is located at the end where the flat push plate 2 is connected to the conveyor chain assembly 4, and is located between the conveyor chain assembly 4 and the conveyor belt 3. The guide plate 28 plays a smooth transition role when the flat push plate 2 is pulled by the conveyor chain assembly 4, so as to avoid interference between the flat push plate 2 and the conveyor chain assembly 4 and the conveyor belt 3.

[0044] like Figure 2 , Figure 4As shown, rotatable door panels 19 are provided on both sides of the push plate 2. Rubber scrapers 20 are installed on the door panels 19. The edges of the door panels 19 are connected to the outer wall of the push plate 2 by several parallel tension springs 21. The tension springs 21 are tensioned by screws 22, causing the door panels 19 on both sides of the push plate 2 to open outward, so that the rubber scrapers 20 on the door panels 19 are in close contact with the side wall of the carriage. This allows the material 13 in the carriage to be pushed forward completely during the movement of the push plate 2.

[0045] like Figure 1 , Figure 2 , Figure 3 As shown, the conveyor chain assembly 4 includes two sets of conveyor chains, which are respectively set on both sides of the bottom of the flat push plate 2. The conveyor chain includes a conveying straight chain segment 25 and a dragging straight chain segment 26. The dragging straight chain segment 26 adopts a plate chain, which can reduce the installation height. One end of the dragging straight chain segment 26 is installed on the second tensioning device 17 at the bottom of the flat push plate 2, and the other end passes around the rear roller 5 to the lower part and connects to one end of the conveying straight chain segment 25 through the connecting plate 27. The other end of the conveying straight chain segment 25 passes around the transmission mechanism 6 to the upper part and connects to the first tensioning device 16 at the bottom of the flat push plate 2. The conveyor belt 3 is located above the dragging straight chain segment 26. Since the conveyor belt 3 is supported by the frame and does not contact the dragging straight chain segment 26, there will be no friction and wear between them, thus improving the service life of the conveyor belt.

[0046] The connecting plate 27 is a corrugated bent plate with several mounting holes. One end of the conveyor belt 3 is bolted to the connecting plate 27. The transmission mechanism 6 drives the conveyor chain segment 25 to pull the conveyor belt 3 and drag the straight chain segment 26.

[0047] The first tensioning device 16 and the second tensioning device 17 both include a tensioning rod 23 and a compression spring 24. The conveying straight chain segment 25 and the dragging straight chain segment 26 are connected to one end of the tensioning rod 23, and the other end of the tensioning rod 23 is provided with a compression spring 24, which tightens the conveying straight chain segment 25 and the dragging straight chain segment 26.

[0048] The transmission mechanism 6 includes a drive shaft 8 and a driven shaft 9. A hydraulic transmission device 7 is connected to the drive shaft 8. The drive shaft 8 is connected to the driven shaft 9 via two sets of separately arranged sprockets 10 and transmission chains 11. Each set of sprockets 10 is equipped with a set of conveyor chains. The drive shaft 8 is driven by the hydraulic transmission device 7, which in turn drives the driven shaft 9 via the sprockets 10 and transmission chains 11. The sprockets 10 at both ends of the driven shaft 9 are synchronized, achieving synchronization of the two sets of conveyor chains and ensuring the stability of the flat plate 2 during movement. The drive shaft 8 is equipped with adjusting bolts 12, which are used to adjust the vertical position of the drive shaft 8, thereby adjusting the tension of the transmission chains 11.

[0049] The rear roller 5 includes a central shaft with four rotatable roller columns 30 on it. Each roller column 30 is a polygonal frame formed by several round steel pipes. Grooved wheels 29 are provided between the roller columns 30 at both ends. The diameter of the grooved wheels 29 is smaller than that of the roller columns 30. A support bearing 31 is provided between the two middle roller columns 30. The support bearing 31 is located at the rear end of the carriage and is used to install the rear roller 5. The drag chain section 26 is set on the grooved wheels 29, and the conveyor belt 3 is set on the roller columns 30.

[0050] When in use, after the hydraulic transmission device 6 is started, it drives the drive shaft 8 to rotate, which in turn drives the driven shaft 9 to rotate through the sprocket 10 and the transmission chain 11. The conveyor straight chain section 25 set on the sprocket 10 moves accordingly, which drives the flat push plate 2 and the conveyor belt 3 to move. The flat push plate 2 pushes the material 13 in front of it to move. Example 3

[0051] like Figure 2 As shown, this embodiment provides a semi-trailer, including a push-pull self-unloading conveyor 1 provided in Embodiment 1 or Embodiment 2. The push-pull self-unloading conveyor 1 is installed in the semi-trailer's cargo box. A mechanical limit switch 34 and an electromagnetic limit switch 35 are provided at the end of the cargo box near the driver's cab. Both the mechanical limit switch 34 and the electromagnetic limit switch 35 are used to control the start and stop of the push-pull self-unloading conveyor. When the push plate 2 or the connection point of the push plate 2 or the conveyor chain assembly 4 with the conveyor belt 3 approaches the electromagnetic limit switch 35 or contacts the mechanical limit switch 34, the transmission mechanism 6 stops operating, thereby limiting the front and rear extreme positions of the push plate 2 and preventing the push plate 2 from colliding with the front of the cargo box or moving outside the semi-trailer. The electromagnetic limit switch takes precedence over the mechanical limit switch.

[0052] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A flat push dump conveyor disposed within a bed, characterized by, include: The push plate is used to push materials, and its bottom is connected to the conveyor chain assembly; The conveyor belt is located outside the conveyor chain assembly, supported by a frame at the bottom of the carriage, and has no contact with the conveyor chain assembly. One end of the belt is located on the push plate. The rear roller is used for steering the conveyor belt and the conveyor chain assembly; The rear roller is provided with several rotatable roller columns. Each roller column is a polygonal frame formed by several round steel pipes. The roller columns are used to install the conveyor belt to achieve its rotation. The rear roller is provided with a grooved wheel, which is used to install the conveyor chain assembly to achieve its rotation. The middle part of the rear roller is also provided with a support bearing for positioning and installing the rear roller. The diameter of the grooved wheel is smaller than the diameter of the roller column. A transmission mechanism and a hydraulic transmission device are used to drive the conveyor chain assembly, thereby driving the movement of the conveyor belt and the flat push plate; The transmission mechanism is driven by the hydraulic transmission device and includes a drive shaft and a driven shaft. The drive shaft is connected to the hydraulic transmission device and is connected to the driven shaft through a sprocket and a transmission chain. The position of the drive shaft is adjusted by an adjusting bolt, thereby adjusting the tension of the transmission chain. The conveyor chain assembly includes two sets of conveyor chains, each conveyor chain comprising a conveying straight chain segment and a dragging straight chain segment, wherein the dragging straight chain segment is a plate chain; One end of the dragging straight chain segment is installed on the second tensioning device at the bottom of the flat push plate, and the other end goes around the rear roller to the lower part and is connected to one end of the conveying straight chain segment through the connecting plate. The other end of the conveying straight chain segment goes around the transmission mechanism to the upper part and is connected to the first tensioning device at the bottom of the flat push plate. The connecting plate is a corrugated bent plate with several mounting holes. One end of the conveyor belt is mounted on the connecting plate by bolts, and the other end is set on the flat push plate. After the hydraulic transmission device is started, it drives the drive shaft to rotate, which in turn drives the driven shaft to rotate through the sprocket and transmission chain. The conveyor chain section set on the sprocket moves accordingly, which in turn drives the flat push plate and the conveyor belt to move.

2. The flat push self-discharging conveyor of claim 1, wherein, The bottom of the flat push plate is equipped with rollers and nylon blocks. The rollers are lower in the middle and higher on both sides. Both the rollers and the nylon blocks are set on the slide rails at the bottom of the carriage to prevent the flat push plate from deviating. The bottom of the push plate is provided with a guide plate to prevent the conveyor chain assembly and conveyor belt from interfering with the push plate.

3. The flat push self-discharging conveyor of claim 1, wherein, The push plate has rotatable door panels on both sides, and rubber scrapers are installed on the door panels. The edges of the door panels are connected to the side walls of the push plate by several parallel tension springs, which are tensioned by screws.

4. The flat push self-discharging conveyor of claim 1, wherein, The flat push plate is provided with an insulation layer, which is filled with insulation material. Several temperature sensors are also installed on the flat push plate, and the temperature sensors transmit temperature data wirelessly.

5. The flat push self-discharging conveyor of claim 1, wherein, Both the first tensioning device and the second tensioning device include a tensioning rod and a compression spring. One end of the tensioning rod is connected to the conveyor chain, and the other end is connected to the compression spring, which tensions the conveyor chain.

6. A semi-trailer characterised in that; The flat push self-unloading conveying device comprises the mechanical limit switch and the electromagnetic limit switch installed at one end of the carriage body near the cab for controlling the start and stop of the flat push self-unloading conveying device, and the action of the electromagnetic limit switch is prior to that of the mechanical limit switch.

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