A power system for unloading pumps with pump trucks

Abstract

This utility model relates to a power system for an unloading pump on a tank truck equipped with a pump, belonging to the technical field of tank trucks equipped with pumps. The power system for the unloading pump includes a universal joint, an electromagnetic clutch, a first flexible coupling, a bevel gear steering gear, and a second flexible coupling connected in sequence. The input end of the universal joint is connected to the output end of the power take-off, and the output end of the second flexible coupling is connected to the torque input end of the unloading pump. The electromagnetic clutch includes a clutch shaft, a magnetic yoke connected to the clutch shaft, an armature disposed adjacent to the magnetic yoke, and an electromagnetic coil for controlling the engagement or disengagement of the armature from the magnetic yoke.

Description

Technical Field

[0001] This utility model relates to the field of pump tank truck technology, specifically to a power system for unloading pumps in a pump tank truck. Background Technology

[0002] A tanker truck with a pump is an engineering vehicle equipped with an unloading pump for storing and transporting liquids such as liquefied petroleum gas. It carries a steel tank. Tanker trucks with pumps typically have a power take-off (PTO), which is usually connected to the gearbox and can output power to external working devices. A transmission structure is required between the PTO and the unloading pump to transmit torque.

[0003] In existing technologies, the transmission structure is usually composed of couplings, gears, flanges, etc. The start and stop of the unloading pump depends entirely on the connection and disconnection of the power take-off, which is cumbersome to operate and the frequent start and stop have a great impact on the vehicle chassis power system. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model proposes a power system for an unloading pump with a pump truck, which enables rapid remote control of the unloading pump.

[0005] The present invention adopts the following technical solution: A power system for an unloading pump in a tank truck is disclosed. The tank truck is equipped with a power take-off (PTO). The power system includes a universal joint, an electromagnetic clutch, a first flexible coupling, a bevel gear steering gear, and a second flexible coupling, which are connected in sequence. The input end of the universal joint is connected to the output end of the PTO, and the output end of the second flexible coupling is connected to the torque input end of the unloading pump. The electromagnetic clutch includes a clutch shaft, a magnetic yoke connected to the clutch shaft, an armature adjacent to the magnetic yoke, and an electromagnetic coil for controlling the engagement or disengagement of the armature and the magnetic yoke. This enables rapid engagement and disengagement of power and allows for remote control of the start and stop of the unloading pump.

[0006] Preferably, the first flexible coupling includes a connector, a first cloverleaf elastic body, and a first bushing. The connector serves as the input end of the first flexible coupling, and its end face is provided with a positioning step for mounting the armature, which facilitates the accurate positioning and reliable installation of the armature.

[0007] Preferably, a return spring is provided between the armature and the connecting member. One end of the return spring abuts against the side of the armature, and the other end abuts against the side of the connecting member, so as to ensure that the armature can quickly return to its original position after the electromagnetic clutch is de-energized, thereby achieving rapid separation of power transmission.

[0008] Preferably, the connector and the armature are each provided with circumferentially evenly distributed light holes and threaded holes. The light holes of the connector correspond to the threaded holes of the armature, and the threaded holes of the connector correspond to the light holes of the armature. The return spring is installed by multiple screws. Some screws pass through the return spring and are installed at the threaded holes of the armature, with the screw heads located in the light holes of the connector. Other screws pass through the return spring and are installed at the threaded holes of the connector, with the screw heads located in the light holes of the armature.

[0009] Preferably, it also includes a bearing housing fixed to the vehicle frame. The bearing housing is sleeved on the clutch shaft by a bearing, and the bearing is limited by an elastic retaining ring on the positioning step of the clutch shaft through a hole, so as to provide stable support for the clutch shaft and ensure its rotational accuracy.

[0010] Preferably, the universal coupling is connected to the power take-off via an input flange and to the clutch shaft via an output flange and a coupling flange, which facilitates power transmission and the disassembly and maintenance of various components.

[0011] Preferably, the coupling flange is fixed to the end of the clutch shaft by a first positioning plate, and the output flange has a cavity in the center to accommodate the first positioning plate, so as to achieve compact assembly and ensure reliable connection.

[0012] Preferably, the output end of the clutch shaft is fixed with a second positioning pressure plate for axial fixation of the connecting piece by a left-hand threaded screw. The left-hand thread can prevent the screw from loosening when the shaft rotates, thus improving safety.

[0013] Preferably, the tanker truck carries a tank body, which is equipped with a gas phase balance port. The gas phase balance port extends upward through an internal pipe to the top of the tank body, and at the same time, the gas phase balance port is connected to the top of the user's storage tank. This can balance the gas pressure in the tank body and the user's storage tank during the unloading process, so that the unloading can proceed smoothly.

[0014] Preferably, an adjusting shim is provided between the screw head and the end of the clutch shaft, and the thickness of the adjusting shim can be used to precisely control the pressing of the second positioning plate and the end face of the clutch shaft, while a reasonable gap is left between the second positioning plate and the end face of the rolling bearing on its right side.

[0015] This invention achieves remote electronic start / stop of the unloading pump by introducing an electromagnetic clutch, simplifying operation and avoiding the impact on the vehicle chassis caused by frequent operation of the power take-off. The use of a flexible coupling and a perforated elastomer effectively absorbs vibration and impact during transmission, improving system reliability and lifespan. The gas phase balance port ensures smooth and safe unloading. The entire system is compact, highly efficient in transmission, and flexible in control, significantly improving the efficiency and operability of unloading operations on tank trucks equipped with pumps. Attached Figure Description

[0016] Fig. 1This is a front structural schematic diagram of the power system for an unloading pump on a tank truck according to the present invention; Fig. 2 This is a side view of the power system for an unloading pump on a tank truck according to the present invention. Fig. 3 This is a schematic diagram of the transmission structure within the dashed circle in the side view structural diagram.

[0017] Figure label: 1. Power take-off (PTO), 2. Input flange, 3. Universal coupling, 4. Chassis, 5. Output flange, 6. First positioning plate, 7. Coupling flange, 8. Clutch shaft, 9. Bearing housing, 10. Bearing housing base, 11. Reducer housing, 12. Electromagnetic coil, 13. Magnetic yoke, 14. Armature, 15. Return spring, 16. Hole elastic retaining ring; 17. First positioning bushing, 18. Connector, 19. Second positioning bushing, 20. Adjusting shim, 21. Second positioning plate, 22. Left-hand threaded screw; 23. First plum blossom elastomer, 24. First bushing, 25. Bevel gear steering gear, 26. Gas phase balance port; 27. Tank body, 28. Pump pre-pipeline, 29. Second bushing, 30. Second plum blossom elastomer, 31. Third bushing, 32. Unloading pump tray, 33. Unloading pump, 34. Pump post-pipeline. Detailed Implementation

[0018] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0019] like Figs. 1-3 This embodiment provides a power system for an unloading pump on a tank truck with a pump, including a universal coupling 3, a clutch shaft 8, a single-plate dry electromagnetic clutch, a first flexible coupling, a bevel gear steering gear 25, a second flexible coupling, and an unloading pump 33.

[0020] One end of the universal coupling 3 is connected to the power take-off 1 of the tanker frame via the input flange 2, and the other end of the universal coupling 3 is connected to the output flange 5. The output flange 5 is in turn connected to the input end of the clutch shaft 8 via the coupling flange 7. The coupling flange 7 is fitted onto the input end of the clutch shaft 8, and a first positioning plate 6 is provided at its end. Screws pass through the first positioning plate 6 and are fixed to the end of the clutch shaft 8, pressing the coupling flange 7 tightly onto the positioning step at the end of the clutch shaft 8. The output flange 5 has a cavity in the center to accommodate the first positioning plate 6.

[0021] The single-plate dry electromagnetic clutch includes an electromagnetic coil 12, a magnetic yoke 13, an armature 14, and a return spring 15.

[0022] Bearing housing 9, magnetic yoke 13, and connecting member 18 are sequentially and parallelly sleeved on clutch shaft 8. First positioning sleeve 17 and second positioning sleeve 19 are also sleeved on clutch shaft 8 and located at both ends of magnetic yoke 13, used to limit the relative position of magnetic yoke 13 and clutch shaft 8 in the axial direction. A second positioning pressure plate 21 is fixed to the output end of clutch shaft 8 by a left-hand threaded screw 22. The second positioning pressure plate 21 cooperates with the second positioning sleeve 19 to axially fix connecting member 18. Connecting member 18 is a component of the input end of the first flexible coupling. A shim 20 is also provided between the head of screw 22 and the end of clutch shaft 8. Adjusting the thickness of shim 20 ensures that pressure plate 21 is tightly attached to the end face of clutch shaft 8. Simultaneously, the left-hand thread of screw 22 prevents screw loosening during shaft rotation.

[0023] The bearing housing 9 is fixedly mounted on the clutch shaft 8 by a bearing. The bearing used to fix the bearing housing is limited on the positioning step of the clutch shaft 8 by a retaining ring 16. The magnetic yoke 13 is mounted on the clutch shaft 8, and the clutch shaft 8 drives the magnetic yoke 13 to rotate via a key. The electromagnetic coil 12 is assembled with the magnetic yoke 13 via a bearing and a bushing. The bushing is used to prevent the bearing from disengaging, and the electromagnetic coil 12 is also fixed to the reducer mount on the frame, limiting the rotation of the electromagnetic coil 12.

[0024] An armature 14 is also provided between the connector 18 and the yoke 13. The side of the connector 18 facing the yoke 13 has a positioning step and a flange for mounting the armature 14. The flange has multiple circumferentially distributed apertures and threaded holes. The armature 14 also has multiple circumferentially distributed apertures and threaded holes. The apertures of the flange correspond to the threaded holes of the armature 14, and the threaded holes of the flange correspond to the apertures of the armature 14. A return spring 15 is provided between the flange side of the connector 18 and the armature 14 side. The return spring 15 is mounted with multiple screws. Some screws pass through the return spring and are mounted in the threaded holes of the armature, with the screw heads located in the apertures of the connector 18. Other screws pass through the return spring and are mounted in the threaded holes of the connector 18, with the screw heads located in the apertures of the armature 14. One end of the return spring 15 abuts against the side of the armature 14, and the other end abuts against the flange side of the connector 18. Due to the limiting effect of the second positioning bushing 19 on the magnetic yoke 13, in the initial state, there is a gap of 0.15~0.3mm between the armature 14 and the magnetic yoke 13, which serves as the extension and retraction space for the return spring 15. When the electromagnetic coil 12 is energized, it generates a magnetic field that attracts the armature 14 and the magnetic yoke 13 to fit together. The magnetic yoke 13 drives the armature 14 and the connecting piece 18 to rotate together through friction. When the power is off, the return spring 15 resets, causing the armature 14 to separate from the magnetic yoke 13, and the power is interrupted.

[0025] The first flexible coupling includes a connector 18, a first cloverleaf elastic body 23, and a first bushing 24. The first cloverleaf elastic body 23 is disposed between the connector 18 and the first bushing 24. Both the connector 18 and the first bushing 24 are provided with disc teeth, and the outer circumference of the first cloverleaf elastic body 23 is provided with petal-shaped teeth. The disc teeth and the petal-shaped teeth engage with each other to form a reliable transmission connection. The output end of the first flexible coupling, i.e., the first bushing 24, is connected to the input shaft of a bevel gear steering gear 25 via a key. The bevel gear steering gear 25 has the function of reducing speed and changing the transmission direction, and its input end and output end are at a certain angle. The output end of the bevel gear steering gear 25 is connected to the input end of the second flexible coupling.

[0026] The second flexible coupling includes a second bushing 29, a second cloverleaf-shaped elastic body 30, and a third bushing 31. Both the second bushing 29 and the third bushing 31 are provided with disc teeth, and the outer circumference of the second cloverleaf-shaped elastic body 30 is provided with petal-shaped teeth. The disc teeth and the petal-shaped teeth interlock to form a reliable transmission connection. The output end of the second flexible coupling is connected to the torque input end of the unloading pump 33 via a key.

[0027] The tanker truck carries a tank body 27, which stores liquids such as oil or liquefied petroleum gas. The outlet of the tank body 27 is connected to the inlet of the unloading pump 33 via a pre-pump pipeline 28, and the outlet of the unloading pump 33 is connected to the user's storage tank via a post-pump pipeline 34. The tank body 27 is equipped with a gas phase balance port 26, which extends upward through an internal pipe to the top of the tank. The gas phase balance port 26 is connected externally to the top of the user's storage tank, balancing the internal gas pressure of the tank body 27 and the user's storage tank. At this time, the torque of the power take-off 1 is transmitted to the torque input end of the unloading pump 33, and the unloading pump 33 rotates to transport the liquid in the tank body 27 to the user's storage tank.

[0028] The unloading operation process of the above-mentioned unloading pump power system is as follows: When the vehicle's power take-off (PTO) 1 is started, the power from PTO 1 is transmitted to the clutch shaft 8 via the input flange 2, universal coupling 3, output flange 5, and coupling flange 7. The clutch shaft 8 drives the magnetic yoke 13 to rotate via a flat key. A rolling bearing is installed between the electromagnetic coil 12 and the magnetic yoke 13, and the electromagnetic coil 12 is fixed. The control electromagnetic coil 12 is energized, causing the armature 14 to attract the magnetic yoke 13. The power is transmitted to the bevel gear steering gear 25 through the connector 18, the first plum blossom elastic body 23, and the first bushing 24. After deceleration and steering, the power is transmitted to the unloading pump 33 through the second plum blossom elastic body 30 and the third bushing 31. When the unloading pump 33 operates, it draws the liquid in the tank 27 into the pre-pump pipeline 28 and delivers it to the user's storage tank through the post-pump pipeline 34. After the operation is completed, the electromagnetic coil 12 is de-energized, the armature 14 is separated from the magnetic yoke 13 under the action of the return spring 15, and the unloading pump stops running.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A power system for an unloading pump in a tank truck equipped with a pump, wherein the tank truck is equipped with a power take-off (1), characterized in that, The system includes a universal joint (3), an electromagnetic clutch, a first flexible coupling, a bevel gear steering gear (25), and a second flexible coupling connected in sequence. The input end of the universal joint (3) is connected to the output end of the power take-off (1), and the output end of the second flexible coupling is connected to the torque input end of the unloading pump (33). The electromagnetic clutch includes a clutch shaft (8), a magnetic yoke (13) connected to the clutch shaft (8), an armature (14) arranged adjacent to the magnetic yoke (13), and an electromagnetic coil (12) for controlling the engagement or disengagement of the armature (14) and the magnetic yoke (13).

2. The unloading pump power system with a pump truck according to claim 1, characterized in that, The first flexible coupling includes a connector (18), a first plum blossom elastic body (23) and a first bushing (24). The connector (18) serves as the input end of the first flexible coupling, and its end face is provided with a positioning step for mounting the armature (14).

3. The unloading pump power system with a pump truck according to claim 2, characterized in that, A return spring (15) is provided between the armature (14) and the connector (18). One end of the return spring (15) abuts against the side of the armature (14), and the other end abuts against the side of the connector (18).

4. The unloading pump power system with a pump truck according to claim 3, characterized in that, The connector (18) and the armature (14) are each provided with a circumferentially evenly distributed light hole and a threaded hole. The light hole of the connector (18) corresponds to the position of the threaded hole of the armature, and the threaded hole of the connector (18) corresponds to the position of the light hole of the armature. The return spring (15) is installed by multiple screws. Some screws pass through the return spring and are installed at the threaded hole of the armature, with the screw head located in the light hole of the connector (18). Other screws pass through the return spring and are installed at the threaded hole of the connector (18), with the screw head located in the light hole of the armature (14).

5. The unloading pump power system with a pump truck according to claim 1, characterized in that, It also includes a bearing housing (9) fixed to the frame, the bearing housing (9) being sleeved on the clutch shaft (8) by a bearing, and the bearing being limited by a retaining ring (16) on the positioning step of the clutch shaft (8) through a hole.

6. The unloading pump power system with a pump truck according to claim 1, characterized in that, The universal coupling (3) is connected to the power take-off (1) through the input flange (2) and to the clutch shaft (8) through the output flange (5) and the coupling flange (7).

7. The unloading pump power system with a pump truck according to claim 6, characterized in that, The coupling flange (7) is fixed to the end of the clutch shaft (8) by the first positioning plate (6), and the output flange (5) has a cavity in the center for accommodating the first positioning plate (6).

8. The unloading pump power system with a pump truck according to claim 1, characterized in that, The output end of the clutch shaft (8) is fixed with a second positioning pressure plate (21) for axial fixation of the connecting piece (18) by a left-hand threaded screw (22).

9. The unloading pump power system with a pump truck according to claim 1, characterized in that, The tanker truck carries a tank body (27), which is provided with a gas phase balance port (26). The gas phase balance port (26) extends upward through an internal pipe to the top of the tank body (27), and at the same time, the gas phase balance port (26) is connected to the top of the user's storage tank.

10. The unloading pump power system with a pump truck according to claim 8, characterized in that, An adjusting shim (20) is provided between the head of the screw (22) and the end of the clutch shaft (8).

Images