Automobile cab lifting oil pump assembly

Abstract

The utility model discloses a lifting oil pump assembly of an automobile cab, which relates to the technical field of hydraulic devices and comprises a reversing valve, an oil pump, a limiting block and a first electromagnet, the reversing valve is used for switching circulation of hydraulic media, the oil pump is mounted on one side of the reversing valve and used for conveying the hydraulic media, and the limiting block is used for limiting the hydraulic media. A valve element for switching a hydraulic medium inlet and a hydraulic medium outlet is arranged in the reversing valve, one end of the top of the valve element communicates with one end of a connecting rod, a hole groove is formed in one end of the connecting rod, and a rotating disc at the top is rotated so that the rotating disc can drive a threaded rod to rotate. The threaded rod can move up and down by being in threaded connection with the sleeve while rotating, when the limiting block on the lower portion moves upwards, the connecting rod can be driven to move upwards, then the valve element can move downwards by reversely rotating the rotating disc, and then the reversing valve of the oil pump assembly can still be used under the power failure condition.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic devices, in particular to a lifting oil pump assembly for an automobile cab. Background Technique

[0002] The cab of an automobile is usually controlled to turn over through a lifting oil pump assembly. The oil pump assembly includes an oil pump and a reversing valve for controlling the oil circuit. The reversing valve controls the oil circuit by sliding the spool inside. After retrieval, the patent with the authorization number of CN102297172B in China discloses a hydraulic reversing valve, a hydraulic reversing valve group and a hydraulic reversing valve control method. Although the split valve sleeve and spool make the spool assembly simple, the spool is not easy to jam, has strong anti-pollution ability, good interchangeability of components, extremely convenient maintenance and replacement, and greatly extends the overall service life. When the reversing valve is in use, it needs to drive the internal electromagnet through an external power supply to control the sliding of the internal spool. When a power failure or power supply fault occurs, the reversing valve cannot be used, and then the lifting oil pump assembly fails, thus affecting the use. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a lifting oil pump assembly for an automobile cab, which solves the problem that the reversing valve of the existing oil pump assembly cannot be used in case of power failure, and then leads to the failure of the oil pump assembly as mentioned in the background technique.

[0004] To achieve the above purposes, the utility model is realized through the following technical solutions: A lifting oil pump assembly for an automobile cab includes a reversing valve, an oil pump, a limiting block and a first electromagnet. The reversing valve is used to switch the flow of hydraulic medium. An oil pump is installed on one side of the reversing valve. The oil pump is used to transport the hydraulic medium. A spool for switching the inlet and outlet of the hydraulic medium is arranged inside the reversing valve. One end of the top of the spool is communicated with one end of a connecting rod. A hole groove is arranged at one end of the connecting rod, and a threaded rod is inserted into the hole groove. A limiting block is welded to the outside of the threaded rod. A turntable is welded to one end of the top of the threaded rod. One end of the bottom of the threaded rod is in threaded connection with the inside of a sleeve. The bottom of the sleeve is welded to the reversing valve.

[0005] Preferably, two limiting blocks are provided. The two limiting blocks are distributed above and below the connecting rod, and the distance between the two limiting blocks is the moving stroke distance of the spool, which is beneficial to avoid the interference of the two limiting blocks when controlling the sliding of the spool through an electric circuit.

[0006] Preferably, a sealing cover is arranged at the other end of the reversing valve. A second electromagnet is embedded at the bottom of the sealing cover. A first electromagnet is arranged above the second electromagnet. The first electromagnet is sleeved on one end of the bottom of the spool.

[0007] Preferably, the bottom surface of the first electromagnet and the top surface of the second electromagnet are in a repulsive state, and the first electromagnet and the second electromagnet are connected to an external power supply. When the first electromagnet and the second electromagnet are energized, repulsion between the two electromagnets will occur, causing the first electromagnet to drive the bottom of the valve core upward, thereby controlling the valve core.

[0008] Preferably, a spring is provided between the first electromagnet and the bottom of the reversing valve. The spring is sleeved outside one end of the bottom of the valve core. When the first electromagnet and the second electromagnet lose their magnetism after power-off, the valve core can slide downward and return to its position under the push of the spring, which is beneficial to keeping the valve core in the correct position all the time.

[0009] The present invention provides a lifting oil pump assembly for an automobile cab, which has the following beneficial effects:

[0010] (1) For the lifting oil pump assembly of an automobile cab, when the reversing valve of the oil pump assembly is powered off, by rotating the turntable at the top, the turntable can drive the threaded rod to rotate. While the threaded rod rotates, it can move up and down by being threadedly connected to the sleeve. When the threaded rod moves up and down, it will drive the external limit block to move. When the lower limit block moves upward, it will drive the connecting rod upward, so that the connecting rod can drive the valve core to slide upward. Then, by rotating the turntable in the reverse direction, it is beneficial to make the valve core move downward, which is beneficial to the reversing valve of the oil pump assembly still being able to be used when powered off.

[0011] (2) For the lifting oil pump assembly of an automobile cab, when the first electromagnet and the second electromagnet are energized, repulsion between the two electromagnets will occur, causing the first electromagnet to drive the bottom of the valve core upward, thereby controlling the valve core. When the first electromagnet and the second electromagnet lose their magnetism after power-off, the valve core can slide downward and return to its position under the push of the spring, which is beneficial to keeping the valve core in the correct position all the time.

[0012] Therefore, the problem that the reversing valve of the existing oil pump assembly cannot be used when powered off, resulting in the failure of the oil pump assembly, is solved. Description of the Drawings

[0013] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 is a schematic diagram of the structure of the first electromagnet and the second electromagnet of the present invention;

[0015] Figure 3 is a schematic diagram of the threaded rod structure of the present invention;

[0016] Figure 4 is a schematic diagram of the top view structure of the present invention;

[0017] Figure 5 This is a schematic side view structure of the utility model.

[0018] In the figure, 1 is a directional control valve; 2 is an oil pump; 3 is a connecting rod; 4 is a threaded rod; 5 is a limit block; 6 is a sleeve; 7 is a valve core; 8 is a turntable; 9 is a sealing cover; 10 is a first electromagnet; 11 is a second electromagnet; 12 is a spring. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] Embodiment 1:

[0021] An automobile cab lifting oil pump assembly includes a directional control valve 1, an oil pump 2, a limit block 5, and a first electromagnet 10. The directional control valve 1 is used to switch the flow of hydraulic medium. An oil pump 2 is installed on one side of the directional control valve 1, and the oil pump 2 is used to transport the hydraulic medium. A valve core 7 for switching the inlet and outlet of the hydraulic medium is arranged inside the directional control valve 1. One end of the top of the valve core 7 is communicated with one end of the connecting rod 3. A hole groove is provided at one end of the connecting rod 3, and a threaded rod 4 is inserted inside the hole groove. A limit block 5 is welded to the outside of the threaded rod 4. One end of the top of the threaded rod 4 is welded to a turntable 8. One end of the bottom of the threaded rod 4 is threadedly connected to the inside of a sleeve 6, and the bottom of the sleeve 6 is welded to the directional control valve 1. There are two limit blocks 5, and the two limit blocks 5 are distributed above and below the connecting rod 3, and the distance between the two limit blocks 5 is the moving stroke distance of the valve core 7. When the directional control valve 1 of this oil pump assembly is powered off, by rotating the turntable 8 at the top, the turntable 8 can drive the threaded rod 4 to rotate. While the threaded rod 4 rotates, it can move up and down by being threadedly connected to the sleeve 6. When the threaded rod 4 moves up and down, it will drive the external limit block 5 to move. When the lower limit block 5 moves upward, it will drive the connecting rod 3 to move upward, and then the connecting rod 3 can drive the valve core 7 to slide upward. Then, by rotating the turntable 8 in the reverse direction, it is beneficial to make the valve core 7 move downward, and thus it is beneficial to enable the directional control valve 1 of the oil pump 2 assembly to still be used when powered off.

[0022] Embodiment 2:

[0023] On the other end of the reversing valve 1, there is a sealing cover 9. A second electromagnet 11 is embedded at the bottom of the sealing cover 9. Above the second electromagnet 11, there is a first electromagnet 10. The first electromagnet 10 is sleeved on one end of the bottom of the valve core 7. The bottom surface of the first electromagnet 10 and the top surface of the second electromagnet 11 are in a repulsive state, and the first electromagnet 10 and the second electromagnet 11 are connected to an external power supply. A spring 12 is arranged between the first electromagnet 10 and the bottom of the reversing valve 1. The spring 12 is sleeved on the outside of one end of the bottom of the valve core 7. When the first electromagnet 10 and the second electromagnet 11 are energized, the repulsion between the two electromagnets will cause the first electromagnet 10 to drive the bottom of the valve core 7 to move upward, thereby controlling the valve core 7. When the first electromagnet 10 and the second electromagnet 11 are de-energized and lose magnetism, the valve core 7 can slide downward and return to its position under the push of the spring 12, which is beneficial for the valve core 7 to always stay in the correct position.

[0024] Working principle: When this oil pump assembly is in use, by energizing the first electromagnet 10 and the second electromagnet 11, when the first electromagnet 10 and the second electromagnet 11 are energized, the repulsion between the two electromagnets will control the valve core 7. When the first electromagnet 10 and the second electromagnet 11 are de-energized and lose magnetism, the valve core 7 can slide downward and return to its position under the push of the spring 12. By rotating the top turntable 8, the turntable 8 can drive the threaded rod 4 to rotate. While the threaded rod 4 is rotating, it can move up and down by being threadedly connected to the sleeve 6. When the threaded rod 4 moves up and down, it will drive the external limit block 5 to move. When the lower limit block 5 moves upward, it will drive the connecting rod 3 to move upward, thereby enabling the connecting rod 3 to drive the valve core 7 to slide upward. By rotating the turntable 8 in the reverse direction, it is beneficial for the valve core 7 to move downward, which is beneficial for the reversing valve 1 of the oil pump 2 assembly.

[0025] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0026] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A vehicle cab lifting oil pump assembly, characterized in that: The invention comprises a reversing valve (1), an oil pump (2), a limit block (5) and a first electromagnet (10), wherein the reversing valve (1) is used for switching the flow of hydraulic medium, an oil pump (2) is installed on one side of the reversing valve (1), and the oil pump (2) is used for conveying hydraulic medium, a valve core (7) for switching the inlet and outlet of hydraulic medium is arranged inside the reversing valve (1), the top end of the valve core (7) is connected with one end of a connecting rod (3), a hole groove is opened at one end of the connecting rod (3), and a threaded rod (4) is inserted inside the hole groove, a limit block (5) is welded outside the threaded rod (4), a rotating disk (8) is welded at the top end of the threaded rod (4), the bottom end of the threaded rod (4) is threadedly connected with the inside of a sleeve (6), and the bottom of the sleeve (6) is welded to the reversing valve (1).

2. The vehicle cab lifting oil pump assembly according to claim 1, characterized in that: Two limit blocks (5) are provided, and the two limit blocks (5) are distributed above and below the connecting rod (3), and the distance between the two limit blocks (5) is the moving stroke distance of the valve core (7).

3. The vehicle cab lifting oil pump assembly according to claim 1, characterized in that: A sealing cover (9) is provided at the other end of the reversing valve (1), a second electromagnet (11) is embedded at the bottom of the sealing cover (9), a first electromagnet (10) is provided above the second electromagnet (11), and the first electromagnet (10) is sleeved on one end of the bottom of the valve core (7).

4. The vehicle cab lifting oil pump assembly according to claim 1, characterized in that: The bottom surface of the first electromagnet (10) and the top surface of the second electromagnet (11) are in a repulsive state, and the first electromagnet (10) and the second electromagnet (11) are connected to an external power source.

5. The vehicle cab lifting oil pump assembly according to claim 1, characterized in that: A spring (12) is provided between the first electromagnet (10) and the bottom of the reversing valve (1), and the spring (12) is sleeved on the outside of one end of the bottom of the valve core (7).

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