Front top semi-trailer dump truck with self-stabilizing structure

Abstract

The utility model discloses a front top half -hitch self -discharging truck with self -stabilizing structure, including semitrailer frame, carriage and front lifting oil cylinder, the carriage sets up the upper portion at semitrailer frame, and the front end of carriage is hinged through front lifting oil cylinder with semitrailer frame front end, and the rear end is hinged through rear turnover axle with semitrailer frame rear end, still include setting at the rear end of semitrailer frame's self -stabilizing structure, the self -stabilizing structure includes the fixed arm of fixed in semitrailer frame rear end lower part, and two telescopic arm oil cylinders of two -pin arrangement in fixed arm left and right two ends, and two support leg oil cylinders of two -pin arrangement in two telescopic arm oil cylinder lower extreme. The utility model has the advantages of: through increasing self -stabilizing structure in semitrailer frame rear end, not only can improve semitrailer frame's lateral stability, can also prevent the goods stagnation when lifting unloading, protects tire, leaf spring, axle, avoids the lateral overturning accident.

Description

Technical Field

[0001] This utility model relates to the technical field of semi-trailer dump trucks, specifically to a front-top semi-trailer dump truck with a self-stabilizing structure. Background Technology

[0002] A front-top semi-trailer dump truck is a type of semi-trailer that unloads cargo by lifting the front of the cargo box. Compared to a belly-top semi-trailer dump truck, a front-top semi-trailer dump truck has many advantages, such as front-mounted hydraulic cylinders, a larger lever arm (allowing for lifting larger loads with the same cylinder size), and the hydraulic cylinder installation space not occupying chassis height, thus lowering the vehicle's center of gravity. It also offers more space for installation and maintenance. However, it also has some disadvantages. For example, during lifting and unloading, cargo stagnation can easily lead to tire blowouts, leaf spring deformation, and axle breakage. In addition, factors such as crosswinds, vehicle vibration, uneven or soft unloading sites, and human error can easily cause lateral rollover accidents. Utility Model Content

[0003] The purpose of this utility model is to provide a front-top semi-trailer dump truck with a self-stabilizing structure to solve the problems of easy tire blowout, axle breakage, leaf spring deformation, and lateral tipping that exist in existing front-top semi-trailer dump trucks in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A front-mounted semi-trailer dump truck with a self-stabilizing structure includes a semi-trailer frame, a cargo box, and a front lifting cylinder. The cargo box is located on the upper part of the semi-trailer frame, and the front end of the cargo box is hinged to the front end of the semi-trailer frame via the front lifting cylinder, and the rear end is hinged to the end of the semi-trailer frame via a rear tipping axle. The self-stabilizing structure is also provided at the rear end of the semi-trailer frame. The self-stabilizing structure includes a fixed arm fixed to the lower part of the rear end of the semi-trailer frame, two telescopic boom cylinders located at the left and right ends of the fixed arm, and two outrigger cylinders located at the lower ends of the two telescopic boom cylinders.

[0005] Furthermore, a pad is provided at the bottom of each of the outrigger cylinders.

[0006] Furthermore, the self-stabilizing structure also includes a support arm operating valve disposed on the upper part of one end of the fixed arm. The support arm operating valve is connected to two telescopic arm cylinders and two outrigger cylinders respectively, and is used to control the extension and retraction of the two telescopic arm cylinders and the two outrigger cylinders.

[0007] Furthermore, the support arm operating valve includes a first operating valve and a second operating valve. The first operating valve is connected to two telescopic arm cylinders and is used to control the extension and retraction of the two telescopic arm cylinders. The second operating valve is connected to two outrigger cylinders and is used to control the extension and retraction of the two outrigger cylinders.

[0008] Furthermore, it also includes a distribution valve located at the upper front end of the semi-trailer frame. The input end of the distribution valve is connected to the hydraulic oil tank via a hydraulic oil pump, and the output end is connected to the front lifting cylinder and the support arm operating valve, respectively. Both the front lifting cylinder and the support arm operating valve are also connected to the hydraulic oil tank.

[0009] Furthermore, it also includes a pneumatically controlled directional valve, a limit valve, a solenoid valve, a manually controlled directional valve, and an air tank, all mounted on the semi-trailer frame. The pneumatically controlled directional valve is connected to the front lifting cylinder, the distribution valve, the hydraulic oil tank, the limit valve, and the manually controlled directional valve, and is used to control the lifting of the front lifting cylinder. The limit valve is connected to the solenoid valve and is used to control the switching of the pneumatically controlled directional valve. The solenoid valve is connected to the manually controlled directional valve and is used to control the on / off connection between the limit valve and the manually controlled directional valve. The manually controlled directional valve is connected to the air tank.

[0010] Compared with the prior art, the advantages of this utility model are as follows: by adding a self-stabilizing structure to the rear end of the semi-trailer frame, not only can the lateral stability of the semi-trailer frame be improved, but also the cargo can be prevented from being stuck during lifting and unloading, protecting the tires, leaf springs, and axles, and avoiding lateral rollover accidents. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in this embodiment, the accompanying drawings used in the description of the embodiment will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a side view of the front-top semi-trailer dump truck with self-stabilizing structure provided by this utility model in the cargo-carrying state; Figure 2 This is a rear view of the front-top semi-trailer dump truck with self-stabilizing structure provided by this utility model in a loaded state. Figure 3 yes Figure 2 Top view of a self-stabilizing structure; Figure 4 This is a side view of the front-top semi-trailer dump truck with self-stabilizing structure provided by this utility model in the unloading state; Figure 5 This is a rear view of the front-top semi-trailer dump truck with a self-stabilizing structure provided by this utility model in the unloading state; Figure 6 yes Figure 4 Top view of a self-stabilizing structure; Figure 7 This is a hydraulic schematic diagram of a front-top semi-trailer dump truck with a self-stabilizing structure provided by this utility model; Figure 8 yes Figure 7 Enlarged view of the operating valve of the middle support arm; Figure 9 yes Figure 7 Enlarged view of the distribution valve; Figure 10 yes Figure 7 Enlarged view of the pneumatically controlled directional valve; Figure 11 yes Figure 7 Enlarged view of the middle limit valve, solenoid valve, manual reversing valve and air tank; Explanation of reference numerals in the attached drawings: 1. Semi-trailer frame; 2. Cargo box; 3. Front lifting cylinder; 4. Rear tipping axle; 5. Self-stabilizing structure; 501. Fixed boom; 502. Telescopic boom cylinder; 503. Outrigger cylinder; 504. Support boom operating valve; 6. Distribution valve; 7. Hydraulic oil pump; 8. Hydraulic oil tank; 9. Pneumatic directional valve; 10. Limit valve; 11. Solenoid valve; 12. Manual directional valve; 13. Air tank. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0014] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0015] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In addition, the appearance of the term "horizontal" does not mean that the component is required to be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0016] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0017] The present invention will be further described below with reference to the accompanying drawings: See Figures 1 to 6 This utility model provides a front-top semi-trailer dump truck with a self-stabilizing structure, including a semi-trailer frame 1, a cargo box 2, and a front lifting cylinder 3. The cargo box 2 is located on the upper part of the semi-trailer frame 1, and the front end of the cargo box 2 is hinged to the front end of the semi-trailer frame 1 through the front lifting cylinder 3. The rear end is hinged to the rear end of the semi-trailer frame 1 through a rear tipping axle 4. A self-stabilizing structure 5 is also provided at the rear end of the semi-trailer frame 1 to stabilize the semi-trailer frame 1 during unloading, protect the tires, leaf springs, and axles, and prevent tire blowouts, leaf spring deformation, axle breakage, and lateral tipping accidents caused by factors such as crosswinds, vehicle vibration, uneven unloading site, soft unloading site, and human error.

[0018] Specifically, see Figure 3 and Figure 6 The self-stabilizing structure 5 includes a fixed arm 501 fixed to the lower rear end of the semi-trailer frame 1, two telescopic arm cylinders 502 located at the left and right ends of the fixed arm 501, and two outrigger cylinders 503 located at the lower ends of the two telescopic arm cylinders 502. The two telescopic arm cylinders 502 can extend outwards and retract inwards, and the two outrigger cylinders 503 can extend downwards and retract upwards. (See reference...) Figures 1 to 3 When the front-mounted semi-trailer dump truck with self-stabilizing structure provided by this utility model is in a traveling state, both telescopic boom cylinders 502 and both outrigger cylinders 503 are in a retracted state; see reference Figures 4 to 6 When the front-mounted semi-trailer dump truck with self-stabilizing structure provided by this utility model is in the unloading state, the two telescopic boom cylinders 502 and the two outrigger cylinders 503 are all in the extended state.

[0019] Specifically, please continue reading Figure 5 In some specific embodiments, in order to increase the ground bearing area, a pad 504 is provided at the bottom of each outrigger cylinder 503. By adding a pad 504 at the bottom of each outrigger cylinder 503, the ground bearing area can be increased, making the rear end of the semi-trailer frame 1 more stable.

[0020] Specifically, see Figure 7 For ease of operation, the self-stabilizing structure of the front-top semi-trailer dump truck provided in this embodiment further includes a support arm operating valve 505 located on the upper part of one end of the fixed arm 501. The support arm operating valve 505 is connected to two telescopic arm cylinders 502 and two outrigger cylinders 503 respectively, and is used to control the extension and retraction of the two telescopic arm cylinders 502 and the two outrigger cylinders 503.

[0021] More specifically, please continue reading Figure 7 The support arm operating valve 505 includes a first operating valve 505a and a second operating valve 505b. The first operating valve 505a is connected to two telescopic arm cylinders 502 and is used to control the extension and retraction of the two telescopic arm cylinders 502. The second operating valve 505b is connected to two outrigger cylinders 503 and is used to control the extension and retraction of the two outrigger cylinders 503.

[0022] Specifically, please continue reading Figure 7 This utility model embodiment provides a front-top semi-trailer dump truck with a self-stabilizing structure, and also includes a distribution valve 6 located at the upper front end of the semi-trailer frame 1. The input end of the distribution valve 6 is connected to the hydraulic oil tank 8 on the front-top semi-trailer dump truck via a hydraulic oil pump 7, and the output end is connected to the front lifting cylinder 3 and the support arm operating valve 505 respectively. The front lifting cylinder 3 and the support arm operating valve 505 are also connected to the hydraulic oil tank 8 on the front-top semi-trailer dump truck.

[0023] Specifically, please continue reading Figure 7This utility model embodiment provides a front-mounted semi-trailer dump truck with a self-stabilizing structure, and also includes a pneumatically controlled directional valve 9, a limit valve 10, a solenoid valve 11, a manually controlled directional valve 12, and an air tank 13 installed on the semi-trailer frame 1. The pneumatically controlled directional valve 9 is connected to the front lifting cylinder 3, the distribution valve 6, the hydraulic oil tank 8, the limit valve 10, and the manually controlled directional valve 12 respectively, and is used to control the lifting of the front lifting cylinder 3. The limit valve 10 is connected to the solenoid valve 11 and is used to control the switching of the pneumatically controlled directional valve 9. The solenoid valve 11 is connected to the manually controlled directional valve 12 and is used to control the on / off connection between the limit valve 10 and the manually controlled directional valve 12. The manually controlled directional valve 12 is connected to the air tank 13.

[0024] More specifically, see Figures 7 to 11 The inlet P of the distribution valve 6 is connected to the outlet of the hydraulic pump 7; the outlet A of the distribution valve 6 is connected to the inlet P of the pneumatic directional valve 9 in the main oil circuit; the outlet B of the distribution valve 6 is connected to the inlet P of the support arm operating valve 505 in the branch oil circuit; the inlet of the hydraulic pump 7, the return port T of the pneumatic directional valve 9, and the return port T of the support arm operating valve 505 are connected to the hydraulic oil tank 8; the working port A of the pneumatic directional valve 9 is connected to the front lifting cylinder 3; the lowering end (i.e., the LOWER end) of the pneumatic directional valve 9 is connected to the air port a of the manual directional valve 5; the lifting end (i.e., the TIP end) of the pneumatic directional valve 9 is connected to the air port a of the limit valve 10; the limit valve 10... The air inlet p is connected to the air port a of the solenoid valve 11, and the air inlet p of the solenoid valve 11 is connected to the air port c of the manual reversing air valve 5; the working port A of the first operating valve 505a in the support arm operating valve 505 is connected to the rod chamber (i.e., the end with the piston rod) of the two telescopic arm cylinders 502, and the working port B is connected to the rodless chamber (i.e., the end without the piston rod) of the two telescopic arm cylinders 502; the working port A of the second operating valve 505b in the support arm operating valve 505 is connected to the rod chamber (i.e., the end with the piston rod) of the two outrigger cylinders 503, and the working port B is connected to the rod chamber (i.e., the end without the piston rod) of the two outrigger cylinders 503.

[0025] Furthermore, the distribution valve 6 is a fixed flow distribution valve, wherein the oil inlet flow rate of the air inlet P is 120 mL / r, the oil outlet flow rate of the oil outlet T is 100 mL / r, and the oil outlet flow rate of the oil outlet T1 is 20 mL / r.

[0026] The working principle of the front-mounted semi-trailer dump truck with self-stabilizing structure provided by this utility model is as follows: When driving, the two telescopic arm cylinders 502 and the two outrigger cylinders 503 of the self-stabilizing structure 5 are all in the retracted state; During unloading, the two telescopic boom cylinders 502 and the two outrigger cylinders 503 of the self-stabilizing structure 5 are all in the extended state; that is, when the top semi-trailer dump truck arrives at the unloading site, the driver first engages the power take-off (PTO) in the cab, and the hydraulic pump 7 starts working. Hydraulic oil is pumped from the hydraulic oil tank 8 into the main oil circuit and the branch oil circuit respectively. At this time, the hydraulic oil flow direction in the main oil circuit is: hydraulic pump 7 → P port of distribution valve 6 → A port of distribution valve 6 → P port of pneumatic directional valve 9 (at this time, the pneumatic directional valve 9 is in the neutral position, and its P port is connected to the T port) → T port of pneumatic directional valve 9 → hydraulic oil tank 8; the hydraulic oil flow direction in the branch oil circuit is: hydraulic pump 7 → P port of distribution valve 6 → B port of distribution valve 6 → P port of support arm operating valve 505 (at this time, the support arm operating valve 505 is in the neutral position, and its P port is connected to the T port) → hydraulic oil tank 8; Both operating valves 505a and 505b of 05 are in the neutral position (the P port and T port of the boom operating valve 505 are connected) → the T port of the support boom operating valve 505 → the hydraulic oil tank 8; then, first operate the handle of the first operating valve 505a in the support boom operating valve 505 to allow oil to enter the rodless chambers of the two telescopic boom cylinders 502, so that the two telescopic boom cylinders 502 extend outward. Then, operate the handle of the second operating valve 505b to allow oil to enter the rodless chambers of the two outrigger cylinders 503, so that the two outrigger cylinders 503 extend downward until the pad block 504 presses the ground. At this time, the self-stabilizing structure 5 forms a stable support for the rear of the semi-trailer frame 1. Finally, operate the pneumatic reversing valve 9 in the main oil circuit to switch to the lifting end (i.e., the TIP end) to lift the front lifting cylinder 3, so as to lift the cargo box 2 for unloading.

[0027] After unloading, first operate the pneumatic reversing valve 9 in the main oil circuit to switch to the lowering end (i.e., the LOWER end), causing the front lifting cylinder 3 to fall and the truck bed 2 to fall back. Then, operate the handle of the second operating valve 505b in the support arm operating valve 505 to switch the handle, allowing oil to enter the rod chambers of the two outrigger cylinders 503, causing the two outrigger cylinders 503 to retract upwards until the pad block 504 leaves the ground and returns to the initial traveling state. Finally, operate the handle of the first operating valve 505a in the support arm operating valve 505 to switch the handle, allowing oil to enter the rod chambers of the two telescopic boom cylinders 502, causing the two telescopic boom cylinders 502 to retract inwards and return to the initial traveling state. At this point, the front-top semi-trailer dump truck can leave the unloading site.

[0028] The pneumatic directional valve 9 in the main oil circuit has a slow descent function. The manual directional valve 12 is used to control the valve core displacement of the pneumatic directional valve 9, thereby controlling the return flow of hydraulic oil in the front lifting cylinder 3, so as to realize the fast, medium and slow descent of the front lifting cylinder 3.

[0029] It should also be noted that the front-top semi-trailer dump truck with self-stabilizing structure provided by this utility model also includes a walking mechanism, which is composed of tires, axles and leaf springs, etc., the same as the existing front-top semi-trailer dump truck. Due to its existing technology, it will not be described in detail in this utility model.

[0030] Finally, it should be noted that the above description is only an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A front-top semi-trailer dump truck with a self-stabilizing structure, comprising a semi-trailer frame (1), a cargo box (2), and a front lifting cylinder (3), wherein the cargo box (2) is disposed on the upper part of the semi-trailer frame (1), and the front end of the cargo box (2) is hinged to the front end of the semi-trailer frame (1) via the front lifting cylinder (3), and the rear end is hinged to the rear end of the semi-trailer frame (1) via a rear tipping axle (4), characterized in that: It also includes a self-stabilizing structure (5) disposed at the rear end of the semi-trailer frame (1). The self-stabilizing structure (5) includes a fixed arm (501) fixed at the lower part of the rear end of the semi-trailer frame (1), two telescopic arm cylinders (502) disposed at the left and right ends of the fixed arm (501), and two outrigger cylinders (503) disposed at the lower ends of the two telescopic arm cylinders (502).

2. The front-top semi-trailer dump truck with self-stabilizing structure according to claim 1, characterized in that: Each of the outrigger cylinders (503) is provided with a pad (504) at its lower part.

3. The front-top semi-trailer dump truck with self-stabilizing structure according to claim 1, characterized in that: The self-stabilizing structure (5) also includes a support arm operating valve (505) disposed on the upper part of one end of the fixed arm (501). The support arm operating valve (505) is connected to two telescopic arm cylinders (502) and two outrigger cylinders (503) respectively, and is used to control the extension and retraction of the two telescopic arm cylinders (502) and the two outrigger cylinders (503).

4. The front-top semi-trailer dump truck with self-stabilizing structure according to claim 3, characterized in that: The support arm operating valve (505) includes a first operating valve (505a) and a second operating valve (505b). The first operating valve (505a) is connected to two telescopic arm cylinders (502) and is used to control the extension and retraction of the two telescopic arm cylinders (502). The second operating valve (505b) is connected to two outrigger cylinders (503) and is used to control the extension and retraction of the two outrigger cylinders (503).

5. The front-top semi-trailer dump truck with self-stabilizing structure according to claim 3, characterized in that: It also includes a distribution valve (6) located at the upper front end of the semi-trailer frame (1). The input end of the distribution valve (6) is connected to the hydraulic oil tank (8) via a hydraulic oil pump (7), and the output end is connected to the front lifting cylinder (3) and the support arm operating valve (505) respectively. The front lifting cylinder (3) and the support arm operating valve (505) are also connected to the hydraulic oil tank (8).

6. The front-top semi-trailer dump truck with self-stabilizing structure according to claim 5, characterized in that: It also includes a pneumatic reversing valve (9), a limit valve (10), a solenoid valve (11), a manual reversing valve (12), and an air tank (13) installed on the semi-trailer frame (1). The pneumatic reversing valve (9) is connected to the front lifting cylinder (3), the distribution valve (6), the hydraulic oil tank (8), the limit valve (10), and the manual reversing valve (12) respectively, and is used to control the lifting of the front lifting cylinder (3). The limit valve (10) is connected to the solenoid valve (11) and is used to control the reversing of the pneumatic reversing valve (9). The solenoid valve (11) is connected to the manual reversing valve (12) and is used to control the opening and closing between the limit valve (10) and the manual reversing valve (12). The manual reversing valve (12) is connected to the air tank (13).

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