A dump truck

Abstract

The present invention relates to a dump truck, comprising: a truck, a hydraulic unit installed on the truck, and a travel unit installed at the bottom of the truck; the truck comprises: a truck body, a front truck plate assembly arranged in the truck body and capable of reciprocating along the truck body, a traction assembly used to drive the front truck plate assembly to reciprocate along the truck body, and a rear door assembly installed at the rear end of the truck body; the hydraulic unit is connected to the traction assembly and used to drive the traction assembly; the hydraulic unit is connected to the rear door assembly and used to drive the rear door assembly to open and close. When unloading, the truck body does not need to be lifted, which can avoid the accidents of the traditional dump truck having the center of gravity raised during unloading, causing the truck body to overturn or tip over.

Description

Technical Field

[0001] The invention relates to the field of machinery, and in particular to a dump truck. Background Art

[0002] Nowadays, dump trucks generally use the rear box to lift up to unload goods, which is not efficient. It is very easy to roll over when unloading on some uneven roads, which is very dangerous. The emergence of flat-push dump trucks perfectly solves this problem. The conveyor belt unloading method not only greatly improves the unloading efficiency, but also fully guarantees the safety during work. Summary of the invention

[0003] The object of the present invention is to provide a dump truck for realizing horizontal push unloading.

[0004] To achieve the above-mentioned object of the invention, the present invention provides a dump truck, comprising: a truck, a hydraulic unit installed on the truck, and a travel unit installed at the bottom of the truck;

[0005] The carriage comprises: a carriage body, a front carriage plate assembly disposed in the carriage body and capable of reciprocating along the carriage body, a traction assembly for driving the front carriage plate assembly to reciprocate along the carriage body, and a rear door assembly installed at the rear end of the carriage body;

[0006] The hydraulic unit is connected to the traction assembly and is used to drive the traction assembly;

[0007] The hydraulic unit is connected to the rear door assembly and is used to drive the rear door assembly to open and close.

[0008] According to one aspect of the present invention, the front compartment panel assembly comprises: a front compartment panel assembly bracket, a front compartment panel arranged on the front compartment panel assembly bracket, and a buffer assembly;

[0009] The front compartment plate assembly bracket and the buffer assembly are respectively connected to the traction assembly.

[0010] According to one aspect of the present invention, the front compartment panel is obliquely arranged on one side of the front compartment panel assembly bracket.

[0011] According to one aspect of the present invention, the front compartment panel assembly bracket comprises: a horizontally arranged bearing structure, a plurality of vertical supporting structures arranged side by side on the bearing structure, and a plurality of horizontal bracing structures arranged side by side in a vertical direction and fixedly connected to the vertical supporting structures;

[0012] The vertical support structure is a frame structure or a plate-like body whose upper end width is smaller than the lower end width;

[0013] The width of the bearing structure is greater than or equal to the width of the lower end of the vertical supporting structure.

[0014] According to one aspect of the present invention, the buffer assembly includes: a supporting connection member, a movable connection member for connecting to the traction assembly, an elastic supporting member arranged between the supporting connection member and the movable connection member, and an auxiliary limiting member.

[0015] According to one aspect of the present invention, the front compartment panel assembly further comprises: side seals respectively arranged on opposite sides of the front compartment panel along the length direction of the front compartment panel assembly, slider structures arranged at opposite ends of the bearing structure, and a front limit plate and a position sensing structure arranged on one side of the front compartment panel assembly bracket;

[0016] A first bottom seal and a second bottom seal are respectively provided at opposite ends of the bearing structure along the width direction of the front compartment panel assembly;

[0017] Along the vertical direction, one end of the first bottom seal is fixedly mounted on the front compartment panel assembly bracket so as to abut against the lower end of the front compartment panel.

[0018] According to one aspect of the present invention, the traction assembly comprises: a first traction unit, a second traction unit, and a traction drive for driving the first traction unit and the second traction unit;

[0019] The first traction unit is connected to a side of the front compartment panel assembly bracket on which the front compartment panel is mounted;

[0020] The second traction unit is connected to the buffer assembly.

[0021] According to one aspect of the present invention, the traction drive drives the first traction unit and the second traction unit to move simultaneously, and the traction directions of the first traction unit and the second traction unit are opposite.

[0022] According to one aspect of the present invention, the first traction unit comprises a transmission belt connected to the front compartment plate assembly bracket and the traction drive at both ends, respectively, and a conveyor belt fixing structure for connecting the front compartment plate assembly bracket and the transmission belt;

[0023] The transmission belt is laid on the bottom of the carriage body so that its width matches the bottom width of the carriage body.

[0024] According to one aspect of the present invention, the conveyor belt fixing structure is interconnected with the front compartment panel assembly bracket and is located between the front compartment panel assembly bracket and the first bottom seal.

[0025] According to one aspect of the present invention, the conveyor belt fixing structure comprises: a first connecting member, a second connecting member and a supporting member;

[0026] The first connecting member and the front compartment panel assembly bracket are fixedly connected to each other, the second connecting member and the first connecting member are detachably connected, and the supporting member is connected to the second connecting member and is arranged opposite to the first bottom seal;

[0027] The transmission belt is located between the first connecting member and the second connecting member.

[0028] According to one aspect of the present invention, the first connecting member comprises: a first connecting component, a second connecting component and a third connecting component;

[0029] The second connecting component and the third connecting component are located on the same side of the first connecting component, and the second connecting component and the third connecting component are arranged obliquely or vertically relative to the first connecting component;

[0030] The first connecting component is provided with a first connecting hole penetrating through its body, and the first connecting hole is an oblong hole.

[0031] According to one aspect of the present invention, the second connecting member comprises: a belt supporting member and a plurality of reinforcing members arranged side by side along the length direction of the belt supporting member;

[0032] The belt supporting member is a plate-like body with an arc-shaped cross section;

[0033] The belt supporting member is provided with a second connecting hole penetrating through the body thereof, and the second connecting hole is a round hole;

[0034] The second connection holes are arranged in one-to-one correspondence with the first connection holes.

[0035] According to one aspect of the present invention, the ends of the second connecting component and the third connecting component away from the first connecting component are provided with a chamfered surface matching the surface shape of the belt supporting member, or the ends of the second connecting component and the third connecting component away from the first connecting component are provided with a clamping member matching the surface shape of the belt supporting member.

[0036] According to one aspect of the present invention, the traction drive comprises: a drum, a turntable coaxially arranged with the drum, and a driving device for driving the drum and the turntable to rotate together;

[0037] Along the axial direction of the roller, a plurality of buckles for connecting the transmission belt are arranged on the roller, and a pressure strip matched with the buckles and connected to press the transmission belt is provided.

[0038] According to one aspect of the present invention, the second traction unit includes: a traction rope connected to the buffer assembly and the turntable at both ends respectively, a traction rope limiting assembly for limiting the installation position of the traction rope, and a plurality of tensioning wheels for tensioning the traction rope.

[0039] According to one aspect of the present invention, at least one of the plurality of tensioning wheels is provided with a tensioning drive capable of adjusting its tensioning position.

[0040] According to one aspect of the present invention, the carriage body comprises: a bottom bracket, and carriage side panels arranged opposite to each other in the width direction of the bottom bracket;

[0041] The cross-section of the compartment side plate is an arc shape.

[0042] According to one aspect of the present invention, a limiting supporting member for supporting the front compartment panel assembly is provided at the front end of the compartment body.

[0043] According to one aspect of the present invention, the hydraulic unit comprises: a tank assembly, a quantitative plunger pump, and a discharge control valve group unit;

[0044] The unloading control valve group unit is connected to the traction assembly and is used to control the linear movement of the front compartment plate assembly;

[0045] The unloading control valve group unit is connected to the rear door assembly for controlling the opening and closing of the rear door assembly.

[0046] According to one aspect of the present invention, the unloading control valve group unit comprises: a traction valve group for connecting with the traction assembly and an opening and closing valve group for connecting with the rear door assembly;

[0047] The traction valve group includes: a first electro-hydraulic reversing valve, a sequence valve, a first check valve, a first pressure reducing valve, a second check valve, and a first overflow valve;

[0048] The opening and closing valve group includes: a second pressure reducing valve, a third one-way valve, a third electro-hydraulic reversing valve, and a one-way throttle valve.

[0049] According to one aspect of the present invention, it also includes: an electronic control unit;

[0050] The electronic control unit includes: a central control box, a single-chip microcomputer installed in the central control box, a wireless decoding circuit, a MOS field effect transistor for controlling the hydraulic unit, a limit switch and / or a sensing switch electrically connected to the central control box and used to obtain the working status or position of the front compartment panel assembly, the traction assembly, and the rear door assembly, and a remote control wirelessly connected to the wireless decoding circuit.

[0051] According to one solution of the present invention, a power take-off and a hydraulic pump are used to convert the mechanical energy of the engine into hydraulic energy, which is transmitted to the traction drive through a pipeline. The traction drive converts the hydraulic energy into mechanical energy again, and the traction drive rotates, thereby realizing the backward translation of the front compartment plate to unload the cargo. When unloading cargo by pushing cargo horizontally, the compartment does not need to be lifted, which can avoid the increase of the center of gravity of the traditional dump truck when unloading cargo, resulting in the side rollover or backward rollover of the compartment.

[0052] According to one solution of the present invention, the dump truck compartment of the present invention has a high unloading rate and no residue, thereby improving transportation efficiency.

[0053] Moreover, it can realize two unloading methods: paving unloading: that is, unloading while moving (need to be determined according to the tractor's gearbox).

[0054] Quantitative batch unloading: that is, quantitative unloading of a batch, and then unloading of another batch after traveling a certain distance. Thus, the flexibility of use of the present invention is improved.

[0055] According to one solution of the present invention, the arc-shaped design of the box body improves the ability to resist external expansion, and the arc-shaped design of the box body has a beautiful appearance and is not easy to accumulate dirt on the surface.

[0056] According to one solution of the present invention, the front compartment plate adopts an inclined structure, thereby overcoming the disadvantages of instability and easy damage caused by large forces on the bottom during unloading, thereby making the present invention more stable in use and having a higher lifespan. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 A perspective view schematically showing a dump truck compartment according to one embodiment of the present invention;

[0058] Figure 2 A structural diagram schematically showing a front compartment panel assembly according to an embodiment of the present invention;

[0059] Figure 3 A front view schematically showing a front compartment panel assembly according to an embodiment of the present invention;

[0060] Figure 4 A side view schematically showing a front compartment panel assembly according to an embodiment of the present invention;

[0061] Figure 5 A schematic diagram showing a structure of a buffer assembly according to an embodiment of the present invention;

[0062] Figure 6 A structural diagram schematically showing a traction assembly according to an embodiment of the present invention;

[0063] Figure 7 A block diagram schematically showing a traction drive according to an embodiment of the present invention;

[0064] Figure 8 A schematic diagram showing a connection structure of a first traction unit and a front compartment panel assembly according to an embodiment of the present invention;

[0065] Fig. 9 A schematic diagram showing a structure of a second connecting member according to an embodiment of the present invention;

[0066] Fig.10 A structural diagram schematically showing a carriage body according to an embodiment of the present invention;

[0067] Fig.11 A schematic diagram showing a structure of a hydraulic unit according to an embodiment of the present invention;

[0068] Fig.12 The figure schematically shows the structure of an electronic control unit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0069] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0070] When describing the embodiments of the present invention, the orientation or positional relationship expressed by the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the relevant drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0071] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the embodiments of the present invention are not therefore limited to the following embodiments.

[0072] like Figure 1As shown, according to one embodiment of the present invention, a dump truck of the present invention comprises: a truck 1, a hydraulic unit 2 (not shown in the figure) installed on the truck 1, and a travel unit 3 installed at the bottom of the truck 1. In this embodiment, the truck 1 comprises: a truck body 11, a front truck plate assembly 12 arranged in the truck body 11 and reciprocating along the truck body 11, a traction assembly 13 used to drive the front truck plate assembly 12 to reciprocate along the truck body 11, and a rear door assembly 14 installed at the rear end of the truck body 11; in this embodiment, the hydraulic unit 2 is connected to the traction assembly 13 and is used to drive the traction assembly 13; in this embodiment, the hydraulic unit 2 is connected to the rear door assembly 14 and is used to drive the rear door assembly 14 to open and close.

[0073] Through the above arrangement, the dump truck of the present invention adopts the structure of the front compartment plate assembly 12 and the hydraulic unit 2, which changes the traditional unloading method and realizes unloading in a horizontal push manner.

[0074] Combination Figure 1 and Figure 2 As shown, according to one embodiment of the present invention, the front compartment panel assembly 12 includes: a front compartment panel assembly bracket 121, a front compartment panel 122 disposed on the front compartment panel assembly bracket 121, and a buffer assembly 123. In this embodiment, the front compartment panel assembly bracket 121 and the buffer assembly 123 are respectively connected to the traction assembly 13.

[0075] Through the above arrangement, under the action of the traction assembly 13, the reciprocating movement of the front compartment panel assembly 12 in the front and rear directions can be flexibly realized, which ensures the unloading of goods and the reset of the front compartment panel assembly 12 with accurate and stable control.

[0076] Combination Figure 1 and Figure 2 As shown, according to one embodiment of the present invention, the front compartment panel 122 is tiltedly arranged on one side of the front compartment panel assembly bracket 121 .

[0077] Through the above-mentioned arrangement, the inclined arrangement of the front compartment plate 122 is beneficial to ensuring stability during the unloading process and to avoiding shaking of the upper end of the front compartment plate assembly 12 .

[0078] Combination Figure 2 , Figure 3 and Figure 4As shown, according to one embodiment of the present invention, the front compartment panel assembly bracket 121 includes: a horizontally arranged bearing structure 1211, a plurality of vertical supporting structures 1212 arranged side by side on the bearing structure 1211, and a plurality of horizontal bracing structures 1213 arranged side by side in the vertical direction and connected to and fixed to the vertical supporting structures 1212. In this embodiment, the vertical supporting structure 1212 is a frame structure or a plate-like body whose upper end width is smaller than the lower end width. In this embodiment, the width of the bearing structure 1211 is greater than or equal to the width of the lower end of the vertical supporting structure 1212. That is, the width of the connection position between the vertical supporting structure 1212 and the bearing structure 1211 is less than or equal to the width of the bearing structure 1211.

[0079] Through the above arrangement, the front compartment plate assembly bracket 121 is arranged as a frame structure which is narrow at the top and wide at the bottom. It not only has a simple structure and good stability, but also ensures that the front compartment plate 122 is arranged at an angle, so that the bearing surface of the lower end of the entire front compartment plate assembly 12 is larger. This is beneficial to ensuring the stable operation of the entire front compartment plate assembly 12 during the unloading process, and can also effectively suppress the shaking of the upper end, thereby ensuring the unloading effect of the entire device.

[0080] Combination Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, according to one embodiment of the present invention, the buffer assembly 123 includes: a supporting connector 1231, a movable connector 1232 for connecting to the traction assembly 13, an elastic supporting member 1233 arranged between the supporting connector 1231 and the movable connector 1232, and an auxiliary limiting member 1234. In this embodiment, the supporting connector 1231 is composed of two vertical plates and a horizontal plate arranged between the two vertical plates, and the vertical plates and the horizontal plate are fixedly connected to each other. In this embodiment, the movable connector 1232 is a rod-shaped body, and a through hole for the movable connector 1232 to pass through is arranged on the horizontal plate of the supporting connector 1231. By arranging the elastic supporting member 1233 between the supporting connector 1231 and the movable connector 1232, one end of the elastic supporting member 1233 abuts against the horizontal plate, and the other end abuts against the movable connector 1232. In this way, the axial movement of the movable connecting member 1232 can produce a compression effect on the elastic supporting member 1233, and the elastic supporting member 1233 can elastically pre-tighten the movable connecting member 1232 to keep it in a stressed state at all times.

[0081] In this embodiment, the movable connecting member 1232 is provided with a rotatable roller 1235 at one end away from the elastic supporting member 1233, so that the roller can be connected to other mechanisms. By providing the roller, the internal force of the movable connecting member 1232 when it moves along the axial direction is eliminated, which is beneficial to ensuring the overall shape and force stability of the movable connecting member 1232.

[0082] In this embodiment, the auxiliary limiting member 1234 is separated from the supporting connecting member 1231, the movable connecting member 1232, and the elastic supporting member 1233, and is used to limit other components (i.e., the second traction unit) connected to the movable connecting member 1232. In this embodiment, the auxiliary limiting member 1234 includes: a limiting plate guide plate 1234a and auxiliary limiting connecting plates 1234b arranged on both sides of the limiting plate guide plate 1234a. In this embodiment, the auxiliary limiting member 1234 is connected to the front compartment plate assembly bracket 121 through the auxiliary limiting connecting plate 1234b, thereby forming an auxiliary limiting channel between the limiting plate guide plate 1234a, the auxiliary limiting connecting plate 1234b and the front compartment plate assembly 12. In this embodiment, the limiting surface on the side of the limiting plate guide plate 1234a adjacent to the front compartment plate assembly bracket 121 is a curved surface, which provides a bending guiding limiting effect on the connecting components passing through the curved surface, thereby avoiding unnecessary shaking of the components passing through the auxiliary limiting member 1234, which is beneficial to ensuring the stable operation of the entire buffer assembly 123.

[0083] like Figure 1 As shown, according to an embodiment of the present invention, the front compartment plate assembly 12 also includes: side seals 124 respectively arranged on opposite sides of the front compartment plate 122 along the length direction of the front compartment plate assembly 12, slider structures 125 arranged at opposite ends of the bearing structure 1211, and a front limit plate 126 and a position sensing structure 127 arranged on one side of the front compartment plate assembly bracket 121. In this embodiment, the side seals 124 match the shape of the compartment side plates 112 of the compartment body 11, which improves the sealing between the front compartment plate assembly 12 and the compartment body 11, avoids the leakage of goods in the compartment, and is beneficial to ensure the stable operation of the structure of the entire compartment at other positions. In this embodiment, the slider structure 125 is directly supported on the bottom bracket 111 of the compartment body 11. Through the action of the slider structure 125, not only the front compartment plate assembly 12 is more stable during the sliding process, but also the friction force during the sliding process is smaller, ensuring the stability of the use of the present invention.

[0084] In this embodiment, along the width direction of the front compartment panel assembly 12, a first bottom seal 128 and a second bottom seal 129 are respectively arranged at opposite ends of the bearing structure 1211. In this embodiment, along the vertical direction, one end of the first bottom seal 128 is fixedly installed on the front compartment panel assembly bracket 121 against the lower end of the front compartment panel 122. The other end is bent and extends in a direction away from the front compartment panel assembly bracket 121. By setting the first bottom seal 128 and extending it in a bent manner, it can achieve a better sealing effect along the connection position between the front compartment panel assembly 12 and the first traction unit, which is beneficial to avoiding leakage of materials. In addition, through the joint action of the first bottom seal 128 and the side seal 124, a sealing ring is formed around the front compartment panel assembly 12, which further improves its sealing effect.

[0085] Combination Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 8 As shown, according to an embodiment of the present invention, the traction assembly 13 includes: a first traction unit 131, a second traction unit 132, and a traction drive 133 for driving the first traction unit 131 and the second traction unit 132. In this embodiment, the first traction unit 131 is connected to a side of the front compartment panel assembly bracket 121 where the front compartment panel 122 is mounted; and the second traction unit 132 is connected to the buffer assembly 123.

[0086] According to an embodiment of the present invention, the traction drive 133 drives the first traction unit 131 and the second traction unit 132 to move simultaneously, and the traction directions of the first traction unit 131 and the second traction unit 132 are opposite.

[0087] Combination Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 8 As shown, according to an embodiment of the present invention, the first traction unit 131 includes a transmission belt 1311 connected to the front compartment panel assembly bracket 121 and the traction drive 133 at both ends, and a conveyor belt fixing structure 1312 for connecting the front compartment panel assembly bracket 121 and the transmission belt 1311. Figure 1 As shown, in this embodiment, the width of the transmission belt 1311 matches the bottom width of the carriage body 11 and is laid on the bottom of the carriage body 11 .

[0088] Through the above arrangement, the transmission belt is connected to the front compartment panel assembly bracket and the traction drive respectively, so that the front compartment panel assembly is driven to move along the carriage body under the action of the traction drive. In addition, the width of the conveyor belt is set to be the same as the bottom width of the carriage body, so that the conveyor belt also plays the role of replacing the carriage floor, which not only ensures the strength of the conveyor belt, but also effectively saves the cost of setting up an additional carriage floor, not only realizing the diversity of uses of the conveyor belt, but also realizing the advantage of reducing the cost of the carriage.

[0089] Combination Figure 2 and Figure 8 As shown, according to one embodiment of the present invention, the conveyor belt fixing structure 1312 is interconnected with the front compartment plate assembly bracket 121, and is located between the front compartment plate assembly bracket 121 and the first bottom seal 128. In this embodiment, the conveyor belt fixing structure 1312 includes: a first connecting member 1312a, a second connecting member 1312b and a supporting member 1312c. In this embodiment, the first connecting member 1312a is fixedly connected to the front compartment plate assembly bracket 121, the second connecting member 1312b is detachably connected to the first connecting member 1312a, and the supporting member 1312c is connected to the second connecting member 1312b and is arranged opposite to the first bottom seal 128; the transmission belt 1311 is located between the first connecting member 1312a and the second connecting member 1312b.

[0090] like Figure 8 As shown, according to an embodiment of the present invention, the first connecting member 1312a includes: a first connecting component 1312a1, a second connecting component 1312a2 and a third connecting component 1312a3. In this embodiment, the second connecting component 1312a2 and the third connecting component 1312a3 are located on the same side of the first connecting component 1312a1, and the second connecting component 1312a2 and the third connecting component 1312a3 are arranged obliquely or vertically relative to the first connecting component 1312a1. In this embodiment, the first connecting component 1312a1 is provided with a first connecting hole that penetrates its body, and the first connecting hole is an oblong hole.

[0091] like Fig. 9 As shown, according to an embodiment of the present invention, the second connecting member 1312b includes: a belt supporting member 1312b1 and a plurality of reinforcing members 1312b2 arranged side by side along the length direction of the belt supporting member 1312b1. In this embodiment, the belt supporting member 1312b1 is a plate-like body with a circular arc cross section; the belt supporting member 1312b1 is provided with a second connecting hole penetrating through its body, and the second connecting hole is a circular hole. In this embodiment, the second connecting holes are arranged one-to-one with the first connecting holes.

[0092] Through the above arrangement, the belt bearing member 1312b1 is a plate-like body with an arc-shaped cross-section, which can ensure a larger bearing area for the transmission belt and balance the force during the pulling process, which is beneficial to ensuring stable pulling of the front compartment plate assembly.

[0093] like Figure 8 As shown, according to one embodiment of the present invention, the second connecting component 1312a2 and the third connecting component 1312a3 are provided with a chamfered surface matching the surface shape of the belt supporting member 1312b1 at one end away from the first connecting component 1312a1, or the second connecting component 1312a2 and the third connecting component 1312a3 are provided with a clamping member matching the surface shape of the belt supporting member 1312b1 at one end away from the first connecting component 1312a1.

[0094] Through the above arrangement, the ends of the second connection component 1312a2 and the third connection component 1312a3 that abut against the transmission belt 1311 are beveled or equipped with a pressing member, so that the first connection member 1312a and the second connection member 1312b have a larger pressing contact surface with the transmission belt 1311, making the pressing of the transmission belt more secure. This is especially beneficial to preventing the transmission belt from slipping, thereby optimizing the force-bearing position of the transmission belt, avoiding wear and tear at the connection position (i.e., the position where the connection member passes through), and increasing the service life of the transmission belt.

[0095] Combination Figure 1 , Figure 6 and Figure 7 As shown, according to an embodiment of the present invention, the traction drive 133 includes: a roller 1331, a turntable 1332 coaxially arranged with the roller 1331, and a driving device 1333 for driving the roller 1331 and the turntable 1332 to rotate together. In this embodiment, along the axis direction of the roller 1331, a plurality of buckles 1331a for connecting the transmission belt 1311 and a pressure strip 1331b for connecting with the buckle and for pressing the transmission belt 1311 are arranged on the roller 1331.

[0096] Through the above arrangement, the end of the transmission belt 1311 is stably pressed against the roller 1331, and the transmission belt 1311 can be rolled up on the roller by rotating the roller, so that the transmission belt drives the front compartment plate assembly to move linearly through the rotation of the roller.

[0097] like Figure 6As shown, according to an embodiment of the present invention, the second traction unit 132 includes: a traction rope 1321 connected to the buffer assembly 123 and the rotating disk 1332 at both ends, a traction rope limiting assembly 1322 for limiting the installation position of the traction rope 1321, and a plurality of tensioning wheels 1323 for tensioning the traction rope 1321. In this embodiment, at least one of the plurality of tensioning wheels 1323 is provided with a tensioning drive 1324 capable of adjusting the tensioning position thereof.

[0098] Through the above arrangement, since the first traction unit and the second traction unit are realized by a unified traction drive 133, as the drum rotates, when the transmission belt is wound around the drum, the traction rope 1321 is loosened. In this way, the traction rope limiting assembly 1322, the tensioning wheel 1323 and the tensioning drive 1324 are arranged so that the traction rope 1321 is always in a tensioned state, which is beneficial to ensuring the stable operation of the second traction unit and avoiding the occurrence of misalignment such as knotting of the traction rope 1321.

[0099] Combination Figure 1 and Fig.10 As shown, according to an embodiment of the present invention, the carriage body 11 comprises: a bottom bracket 111, and carriage side panels 112 arranged opposite to each other in the width direction of the bottom bracket. In this embodiment, the cross-sectional shape of the carriage side panels 112 is an arc.

[0100] like Fig.11 As shown, according to one embodiment of the present invention, a limiting supporting member 12 a for supporting the front compartment panel assembly 12 is provided at the front end of the compartment body 11 .

[0101] like Fig.11 As shown, according to an embodiment of the present invention, the hydraulic unit 2 includes: an oil tank assembly 21, a quantitative plunger pump 22, and a discharge control valve group unit 23. In this embodiment, the discharge control valve group unit 23 is connected to the traction assembly 13 to control the linear movement of the front compartment plate assembly 12. In addition, the discharge control valve group unit 23 is also connected to the rear door assembly 14 to control the opening and closing of the rear door assembly 14.

[0102] like Fig.11 As shown, according to an embodiment of the present invention, the unloading control valve group unit 23 includes: a traction valve group for connecting with the traction assembly 13 and an opening and closing valve group for connecting with the rear door assembly 14. In this embodiment, the traction valve group includes: a first electro-hydraulic reversing valve 2301, a sequence valve 2302, a first check valve 2303, a first pressure reducing valve 2304, a second check valve 2305, a first overflow valve 2306, and a second electro-hydraulic reversing valve 2311;

[0103] The opening and closing valve group includes: a second pressure reducing valve 2307 , a third one-way valve 2308 , a third electro-hydraulic reversing valve 2309 , and a one-way throttle valve 2310 .

[0104] like Fig.11 As shown, according to an embodiment of the present invention, the second electro-hydraulic reversing valve 2311 is used to control the on-off of the hydraulic unit 2; the first overflow valve 2306 is used to control the system pressure of the hydraulic unit 2 within a preset range. The first electro-hydraulic reversing valve 2301 is used to control the rotation of the drive device 1333 in the traction assembly 13 and the extension and retraction of the tensioning drive 1324, so that the drive device 1333 can transmit the rotation of the transmission belt 1311 connected thereto, and the tensioning drive 1324 can tension the traction rope 1321 to make it run stably. The third electro-hydraulic reversing valve 2309 is used to control the extension and retraction of the hydraulic cylinder c in the rear door assembly 14 to open or close the rear door of the vehicle compartment connected thereto.

[0105] like Fig.11 As shown, according to one embodiment of the present invention, the second electro-hydraulic reversing valve 2311 is an electromagnetic reversing valve, the first electro-hydraulic reversing valve 2301 is a plate-type electromagnetic reversing valve, the third electro-hydraulic reversing valve 2309 is a hydraulic reversing valve, the one-way throttle valve 2310 is a one-way throttle valve, and the first pressure reducing valve 2304 is a pressure reducing overflow valve.

[0106] like Fig.11 As shown, according to one embodiment of the present invention, the second electro-hydraulic reversing valve 2311 is connected to the first overflow valve 2306, wherein the oil inlet P of the second electro-hydraulic reversing valve 2311 is connected to the control oil port X of the first overflow valve 2306, and the oil outlet O of the second electro-hydraulic reversing valve 2311 is connected to the oil outlet O of the first overflow valve 2306.

[0107] like Fig.11 As shown, according to an embodiment of the present invention, the oil outlets O of the first electro-hydraulic reversing valve 2301 and the third electro-hydraulic reversing valve 2309 are connected to the oil outlet O of the first overflow valve 2306 and to the oil return port T of the oil tank. In this embodiment, the oil inlet P1 of a one-way throttle valve 2310 is connected to the oil port A of the third electro-hydraulic reversing valve 2309, and its oil outlet P2 is connected to one oil port of the hydraulic cylinder, and the oil inlet P1 of another one-way throttle valve 2310 is connected to the oil port B of the third electro-hydraulic reversing valve 2309, and its oil outlet P2 is connected to another oil port of the hydraulic cylinder. In this embodiment, by changing the oil delivery direction of the oil port A and the oil port B, the telescopic control of the hydraulic cylinder c can be achieved.

[0108] like Fig.11As shown, according to one embodiment of the present invention, the oil port A of the first electro-hydraulic reversing valve 2301 is connected to an oil port of the driving device 1333, and the oil port B of the first electro-hydraulic reversing valve 2301 is connected to another oil port of the driving device 1333 through the sequence valve 2302.

[0109] like Fig.11 As shown, according to one embodiment of the present invention, the oil port B of the first electro-hydraulic reversing valve 2301 is connected to the tensioning drive 1324 through the first pressure reducing valve 2304. In this embodiment, the oil inlet P1 of the first pressure reducing valve 2304 is connected to the oil port B of the first electro-hydraulic reversing valve 2301, and the oil outlet P2 of the first pressure reducing valve 2304 is connected to the tensioning drive 1324.

[0110] In this embodiment, the second one-way valve 2305 is arranged in parallel with the first pressure reducing valve 2304; wherein, the oil inlet P1 of the second one-way valve 2305 is connected to the oil outlet P2 of the first pressure reducing valve 2304, and the oil outlet P2 of the second one-way valve 2305 is connected to the oil inlet P1 of the first pressure reducing valve 2304.

[0111] like Fig.11 As shown, according to one embodiment of the present invention, a free overload valve 2312 is further provided, and an oil inlet P1 of the overload valve 2312 is connected to an oil outlet P2 of the sequence valve 2302 .

[0112] like Fig.12 As shown, according to an embodiment of the present invention, it further includes: an electric control unit 4. In this embodiment, the electric control unit 4 includes: a central control box, a single chip microcomputer installed in the central control box, a wireless decoding circuit, a MOS field effect transistor for controlling the hydraulic unit 2, a limit switch and / or a sensing switch electrically connected to the central control box and used to obtain the working state or position of the front compartment panel assembly 12, the traction assembly 13, and the rear door assembly 14, and a remote controller wirelessly connected to the wireless decoding circuit.

[0113] The above contents are merely examples of specific solutions of the present invention. For devices and structures not described in detail therein, it should be understood that they can be implemented by adopting general devices and general methods available in the art.

[0114] The above is only one solution of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dump truck, characterized in that: include: A carriage (1), a hydraulic unit (2) installed on the carriage (1), and a travel unit (3) installed at the bottom of the carriage (1); The carriage (1) comprises: a carriage body (11), a front carriage plate assembly (12) arranged in the carriage body (11) and capable of reciprocating along the carriage body (11), a traction assembly (13) used for driving the front carriage plate assembly (12) to reciprocate along the carriage body (11), and a rear door assembly (14) installed at the rear end of the carriage body (11); The hydraulic unit (2) is connected to the traction assembly (13) and is used to drive the traction assembly (13); The hydraulic unit (2) is connected to the rear door assembly (14) and is used to drive the rear door assembly (14) to open and close; The front compartment plate assembly (12) comprises: a front compartment plate assembly bracket (121), a front compartment plate (122) arranged on the front compartment plate assembly bracket (121), and a buffer assembly (123); The front compartment plate assembly bracket (121) and the buffer assembly (123) are respectively connected to the traction assembly (13); The traction assembly (13) comprises: a first traction unit (131), a second traction unit (132), and a traction drive (133) for driving the first traction unit (131) and the second traction unit (132); The first traction unit (131) is connected to a side of the front compartment panel assembly bracket (121) on which the front compartment panel (122) is mounted; The second traction unit (132) is connected to the buffer assembly (123); The traction drive (133) drives the first traction unit (131) and the second traction unit (132) to move simultaneously, and the traction directions of the first traction unit (131) and the second traction unit (132) are opposite; The first traction unit (131) comprises a transmission belt (1311) connected to the front compartment panel assembly bracket (121) and the traction drive (133) at both ends, and a conveyor belt fixing structure (1312) for connecting the front compartment panel assembly bracket (121) and the transmission belt (1311); The transmission belt (1311) is laid on the bottom of the carriage body (11) so that its width matches the bottom width of the carriage body (11); The conveyor belt fixing structure (1312) is connected to the front compartment plate assembly bracket (121) and is located between the front compartment plate assembly bracket (121) and the first bottom seal (128); The conveyor belt fixing structure (1312) comprises: a first connecting member (1312a), a second connecting member (1312b) and a supporting member (1312c); The first connecting member (1312a) and the front compartment plate assembly bracket (121) are fixedly connected to each other, the second connecting member (1312b) and the first connecting member (1312a) are detachably connected, and the supporting member (1312c) is connected to the second connecting member (1312b) and is arranged opposite to the first bottom seal (128); The transmission belt (1311) is located between the first connecting member (1312a) and the second connecting member (1312b); The first connecting member (1312a) includes: a first connecting component (1312a1), a second connecting component (1312a2) and a third connecting component (1312a3); The second connecting component (1312a2) and the third connecting component (1312a3) are located on the same side of the first connecting component (1312a1), and the second connecting component (1312a2) and the third connecting component (1312a3) are arranged obliquely or vertically relative to the first connecting component (1312a1); The first connecting component (1312a1) is provided with a first connecting hole penetrating through its body, and the first connecting hole is an oblong hole; The second connecting member (1312b) comprises: a belt supporting member (1312b1) and a plurality of reinforcing members (1312b2) arranged side by side along the length direction of the belt supporting member (1312b1); The belt supporting member (1312b1) is a plate-like body with an arc-shaped cross section; The belt supporting member (1312b1) is provided with a second connecting hole penetrating through its body, and the second connecting hole is a round hole; The second connection holes are arranged in one-to-one correspondence with the first connection holes; The ends of the second connecting component (1312a2) and the third connecting component (1312a3) away from the first connecting component (1312a1) are provided with a chamfered surface matching the surface shape of the belt supporting member (1312b1), or the ends of the second connecting component (1312a2) and the third connecting component (1312a3) away from the first connecting component (1312a1) are provided with a pressing member matching the surface shape of the belt supporting member (1312b1); The traction drive (133) comprises: a roller (1331), a turntable (1332) coaxially arranged with the roller (1331), and a driving device (1333) for driving the roller (1331) and the turntable (1332) to rotate together; A plurality of buckles for connecting the transmission belt (1311) are arranged on the roller (1331) along the axis direction of the roller (1331), and a pressure strip for pressing the transmission belt (1311) and cooperating with the buckles is provided; The second traction unit (132) comprises: a traction rope (1321) connected to the buffer assembly (123) and the rotating disk (1332) at both ends, respectively; a traction rope limiting assembly (1322) for limiting the installation position of the traction rope (1321); and a plurality of tensioning wheels (1323) for tensioning the traction rope (1321); The hydraulic unit (2) comprises: an oil tank assembly (21), a quantitative plunger pump (22), and a discharge control valve group unit (23); The unloading control valve group unit (23) is connected to the traction assembly (13) and is used to control the linear movement of the front compartment plate assembly (12); The unloading control valve group unit (23) is connected to the rear door assembly (14) and is used to control the opening and closing of the rear door assembly (14).

2. The dump truck according to claim 1, characterized in that: The front compartment plate (122) is arranged obliquely on one side of the front compartment plate assembly bracket (121).

3. The dump truck according to claim 2, characterized in that: The front compartment panel assembly bracket (121) comprises: a horizontally arranged bearing structure (1211), a plurality of vertical supporting structures (1212) arranged side by side on the bearing structure (1211), and a plurality of horizontal bracing structures (1213) arranged side by side in a vertical direction and fixedly connected to the vertical supporting structures (1212); The vertical support structure (1212) is a frame structure or a plate-like body whose upper end width is smaller than that of the lower end; The width of the bearing structure (1211) is greater than or equal to the width of the lower end of the vertical supporting structure (1212).

4. The dump truck according to claim 3, characterized in that: The buffer assembly (123) comprises: a supporting connection member (1231), a movable connection member (1232) for connecting to the traction assembly (13), an elastic supporting member (1233) arranged between the supporting connection member (1231) and the movable connection member (1232), and an auxiliary limiting member (1234).

5. The dump truck according to claim 4, characterized in that: The front compartment plate assembly (12) further comprises: side seals (124) respectively arranged on opposite sides of the front compartment plate (122) along the length direction of the front compartment plate assembly (12), slider structures (125) arranged on opposite ends of the bearing structure (1211), and a front limit plate (126) and a position sensing structure (127) arranged on one side of the front compartment plate assembly bracket (121); A first bottom seal (128) and a second bottom seal (129) are respectively arranged at opposite ends of the bearing structure (1211) along the width direction of the front compartment panel assembly (12); In the vertical direction, one end of the first bottom seal (128) is fixedly mounted on the front compartment plate assembly bracket (121) so as to abut against the lower end of the front compartment plate (122).

6. The dump truck according to claim 1, characterized in that: At least one of the plurality of tensioning wheels (1323) is provided with a tensioning drive (1324) capable of adjusting its tensioning position.

7. The dump truck according to any one of claims 1 to 6, characterized in that: The carriage body (11) comprises: a bottom bracket (111), and carriage side panels (112) arranged opposite to each other in the width direction of the bottom bracket; The cross-sectional shape of the compartment side plate (112) is arc-shaped.

8. The dump truck according to claim 7, characterized in that: The front end of the carriage body (11) is provided with a position-limiting supporting member for supporting the front carriage panel assembly (12).

9. The dump truck according to claim 1, characterized in that: The unloading control valve group unit (23) comprises: a traction valve group for connecting to the traction assembly (13) and an opening and closing valve group for connecting to the rear door assembly (14); The traction valve group includes: a first electro-hydraulic reversing valve (2301), a sequence valve (2302), a first check valve (2303), a first pressure reducing valve (2304), a second check valve (2305), and a first overflow valve (2306); The opening and closing valve group includes: a second pressure reducing valve (2307), a third one-way valve (2308), a third electro-hydraulic reversing valve (2309), and a one-way throttle valve (2310).

10. The dump truck according to claim 1, characterized in that: Also includes: Electronic control unit (4); The electronic control unit (4) comprises: a central control box, a single chip microcomputer installed in the central control box, a wireless decoding circuit, a MOS field effect transistor for controlling the hydraulic unit (2), a limit switch and / or a sensing switch electrically connected to the central control box and used to obtain the working state or position of the front compartment panel assembly (12), the traction assembly (13), and the rear door assembly (14), and a remote controller wirelessly connected to the wireless decoding circuit.

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