Hydraulic gear pump of backlash-free meshing gear capable of realizing no oil trapping

Abstract

The utility model discloses a hydraulic gear pump of a backlash-free meshing gear capable of realizing no oil trapping, which relates to the technical field of hydraulic transmission and comprises a filter rotating part, a ball valve rotating part, a filter component and a meshing mechanism, the ball valve rotating parts communicate with the left side and the right side of the filter rotating part, one end of each ball valve rotating part communicates with a rotating part, and the inner surface of each rotating part is in threaded connection with a pump body rotating part. The filtering assembly is fixedly arranged at the bottom of the inner wall of the filter rotating part and is used for filtering oil at the front end of the gear pump; the meshing mechanism is arranged in the pump body rotating piece and used for extracting oil liquid through the gear pump. The ball valves on the two sides of the filter are closed, then the rotating piece is screwed to disassemble the filter, oil liquid with impurities is filtered through the arrangement of the filter screen with the water inlet and the filter element, and therefore friction between gears is reduced, and the situation of oil trapping is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic transmission, in particular to a hydraulic gear pump capable of realizing oil-free and backlash-free meshing gears. Background Art

[0002] The hydraulic gear pump is an important hydraulic transmission component that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gears to transport liquid or increase its pressure.

[0003] In the prior art, due to the influence of factors such as the structural design, manufacturing accuracy and working conditions of the gear pump, oil may be trapped. Announcement No.: CN 218093418 U discloses a gear pump without oil trapping. By improving the shape of the driven gear tooth gallery in the meshing gear of the gear pump, the oil trapping phenomenon of the ordinary gear pump is solved, the working stability of the gear pump is improved, the noise is reduced, the working efficiency of the gear pump is improved, and the life of the gear pump is extended, so that the gear pump can be more widely used.

[0004] However, when the device is in use, impurities may be mixed in the oil, which may cause oil entrapment. The impurity particles will increase the friction between the gear and the pump body, making the operation of the gear pump difficult. When the gear is rotating, these impurity particles may get stuck on the surface of the gear or the pump body, forming an obstacle, causing the gear pump's oil absorption capacity to decrease, thus causing oil entrapment. Utility Model Content

[0005] The utility model aims to provide a hydraulic gear pump which can realize oil-free and backlash-free meshing gears, so as to solve the problems in the background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A hydraulic gear pump capable of achieving backlash-free meshing of gears without oil entrapment, comprising: a filter;

[0008] A ball valve is connected to the left and right sides of the filter, one end of the ball valve is connected to a rotating part, and the inner surface of the rotating part is threadedly connected to the pump body;

[0009] The filter assembly is fixedly arranged at the bottom of the inner wall of the filter and is used to filter the oil at the front end of the gear pump.

[0010] The meshing mechanism is arranged inside the pump body and is used for the gear pump to extract oil.

[0011] In an optional solution: the filter assembly includes a filter screen, which is fixedly arranged at the bottom of the inner wall of the filter, a water inlet is opened on the left side of the filter screen, and a filter element is fixedly connected to the bottom of the inner wall of the filter.

[0012] In an optional solution: the meshing mechanism includes a mounting groove, which is opened inside the pump body, and a sliding component is fixedly connected to the inner surface of the mounting groove to enable the gear pump to mesh tightly.

[0013] In an optional solution: the sliding assembly includes a sliding bracket, the sliding bracket is fixedly arranged on the inner surface of the mounting groove, the inner wall of the sliding bracket is slidably connected with a slider, the right side of the slider is fixedly connected with a spring, and the right side of the spring is fixedly connected to the left side of the inner wall of the sliding bracket.

[0014] In an optional solution: the tops of the sliding bracket and the sliding block are both slidably connected with a rotating shaft, the outer surfaces of the two rotating shafts are both rotatably connected with gears, and the two gears are meshed with each other.

[0015] In an optional solution: the inner wall of the rotating part is provided with a thread.

[0016] In an optional solution: the filter screen is made of stainless steel.

[0017] In an optional solution: a load-relief groove is provided on the inner surface of the mounting groove, and a sliding groove adapted to the sliding block is provided on the inner wall of the sliding bracket.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. The utility model closes the ball valves on both sides of the filter, then twists the rotating part to disassemble the filter, and filters the oil with impurities through the filter screen and filter element with a water inlet, thereby reducing the friction between the gears and avoiding the occurrence of oil entrapment.

[0020] 2. The utility model slides the slider on the inner wall of the sliding bracket, and then installs the gear. Under the setting of the spring, the slider is reset, so that the two gears are meshed tightly, thereby reducing the gap between the two gears and avoiding the occurrence of oil entrapment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] Figure 2 It is a structural schematic diagram of the filter in the utility model.

[0023] Figure 3 It is a schematic cross-sectional structure diagram of the filter in the utility model.

[0024] Figure 4 It is a schematic cross-sectional structural diagram of the pump body in the utility model.

[0025] Figure 5 It is a structural schematic diagram of the sliding bracket in the utility model.

[0026] Notes on the figure numbers: 1. filter; 2. ball valve; 3. rotating part; 4. pump body; 5. filter screen; 6. water inlet; 7. filter element; 8. mounting groove; 9. sliding bracket; 10. slider; 11. spring; 12. rotating shaft; 13. gear. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] In one embodiment, Figure 1-Figure 5 As shown, a hydraulic gear pump with side clearance-free meshing gears that can achieve no oil entrapment includes a filter 1, a ball valve 2, a filter assembly and a meshing mechanism; the ball valve 2 is connected to the left and right sides of the filter 1, and one end of the ball valve 2 is connected to a rotating member 3, and the inner surface of the rotating member 3 is threadedly connected to a pump body 4; the filter assembly is fixedly arranged at the bottom of the inner wall of the filter 1, and is used to filter the oil at the front end of the gear pump; the meshing mechanism is arranged inside the pump body 4, and is used for the gear pump to extract the oil, and the inner walls of the two rotating members 3 are provided with threads, and the rotating member 3 is aligned with the water pipe that is compatible with it, and then the rotating member 3 is twisted to facilitate the quick installation of the filter 1, and the setting of the ball valve 2 makes it easy for the operator to close the fluid at both ends of the filter 1, thereby facilitating the removal and replacement of the filter 1.

[0029] In one embodiment, Figure 2 As shown, the filter assembly includes a filter screen 5, which is fixedly arranged at the bottom of the inner wall of the filter 1. A water inlet 6 is opened on the left side of the filter screen 5. A filter element 7 is fixedly connected to the bottom of the inner wall of the filter 1. The filter screen 5 is made of stainless steel and can filter relatively solid and sharp impurities such as screws. The setting of the water inlet 6 makes it easy to drain the oil into the inside of the filter screen for filtration to prevent impurities from clogging the water pipe. The setting of the filter element 7 makes it easy to deeply filter the oil. The filter element 7 contains activated carbon to enhance the filtering effect.

[0030] In one embodiment, Figure 2 and Figure 3 As shown, the meshing mechanism includes a mounting groove 8, which is opened inside the pump body 4. A sliding component is fixedly connected to the inner surface of the mounting groove 8 to make the gear pump mesh tightly. The setting of the mounting groove 8 facilitates the installation of the sliding bracket 9.

[0031] In one embodiment, Figure 1As shown, the sliding assembly includes a sliding bracket 9, which is fixedly arranged on the inner surface of the mounting groove 8. A slider 10 is slidably connected to the inner wall of the sliding bracket 9. A spring 11 is fixedly connected to the right side of the slider 10. The right side of the spring 11 is fixedly connected to the left side of the inner wall of the sliding bracket 9. A unloading groove is provided on the inner surface of the mounting groove 8 to lead out the trapped oil so as to avoid excessive pressure of the oil inside the gear pump. A sliding groove adapted to the slider 10 is provided on the inner wall of the sliding bracket 9 to facilitate the sliding of the slider 10 on the inner wall of the sliding bracket 9. The setting of the spring 11 facilitates the resetting of the slider 10, thereby making the meshing of the gear 13 on the slider 10 more compact.

[0032] In one embodiment, Figure 1 As shown, the tops of the sliding bracket 9 and the slider 10 are both slidably connected with a rotating shaft 12, and the outer surfaces of the two rotating shafts 12 are rotatably connected with gears 13. The two gears 13 are meshed with each other. The setting of the rotating shaft 12 facilitates the installation of the gears 13. Both gears 13 are gears without side clearance, and the overlapping coefficient of the gears 13 is greater than 1.

[0033] The above-mentioned embodiment discloses a hydraulic gear pump with side clearance-free meshing gears that can achieve oil trapping, wherein the operator closes the ball valves on both sides of the filter 1 and then twists the rotating part 3 to quickly disassemble the filter 1, which is convenient for replacing the filter 1. The oil passes through the filter 1. Due to the setting of the water inlet 6 on the left side of the filter, the impurities can be filtered inside the filter under the setting of the filter element 7, and the filtered oil is discharged from the right side of the filter 5. The device can filter impurities in the oil and can be quickly disassembled and assembled, saving the operator's replacement and cleaning time, bringing convenience to the operator. The slider 10 slides on the inner wall of the sliding bracket 9, thereby pulling the spring 11. At this time, the two gears 13 are installed, and then the spring 11 is reset, so that the two gears 13 are meshed compactly, reducing the gap between the gears 13, and then the setting of the unloading groove avoids the occurrence of oil trapping inside the gear pump.

[0034] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A hydraulic gear pump capable of realizing backlash-free meshing gears without oil entrapment, including: filter(1); A ball valve (2), the ball valve (2) being connected to the left and right sides of the filter (1), one end of each of the ball valves (2) being connected to a rotating member (3), the inner surface of the rotating member (3) being threadedly connected to a pump body (4); It is characterized in that it also comprises a filter assembly, which is fixedly arranged at the bottom of the inner wall of the filter (1) and is used to filter the oil at the front end of the gear pump; A meshing mechanism, wherein the meshing mechanism is arranged inside the pump body (4) and is used for the gear pump to extract oil.

2. The hydraulic gear pump capable of realizing backlash-free meshing gears without oil entrapment according to claim 1, characterized in that: The filter assembly comprises a filter screen (5), the filter screen (5) being fixedly arranged at the bottom of the inner wall of the filter (1), a water inlet (6) being provided on the left side of the filter screen (5), and a filter element (7) being fixedly connected to the bottom of the inner wall of the filter (1).

3. The hydraulic gear pump capable of realizing backlash-free meshing gears without oil entrapment according to claim 2, characterized in that: The meshing mechanism comprises a mounting groove (8), the mounting groove (8) being arranged inside the pump body (4), and a sliding assembly being fixedly connected to the inner surface of the mounting groove (8) for enabling the gear pump to mesh tightly.

4. The hydraulic gear pump capable of realizing backlash-free meshing gears without oil entrapment according to claim 3, characterized in that: The sliding assembly comprises a sliding bracket (9), the sliding bracket (9) being fixedly arranged on the inner surface of the mounting groove (8), the inner wall of the sliding bracket (9) being slidably connected to a sliding block (10), the right side of the sliding block (10) being fixedly connected to a spring (11), and the right side of the spring (11) being fixedly connected to the left side of the inner wall of the sliding bracket (9).

5. The hydraulic gear pump capable of realizing backlash-free meshing gears without oil entrapment according to claim 4, characterized in that: The tops of the sliding bracket (9) and the sliding block (10) are both slidably connected to a rotating shaft (12), and the outer surfaces of the two rotating shafts (12) are both rotatably connected to gears (13), and the two gears (13) are meshed with each other.

6. The hydraulic gear pump capable of realizing backlash-free meshing gears without oil entrapment according to claim 1, characterized in that: The inner walls of the two rotating parts (3) are provided with threads.

7. The hydraulic gear pump having backlash-free meshing gears capable of achieving oil-free meshing according to claim 2, characterized in that: The filter screen (5) is made of stainless steel.

8. The hydraulic gear pump capable of realizing backlash-free meshing gears without oil entrapment according to claim 4, characterized in that: The inner surface of the installation groove (8) is provided with a load-releasing groove, and the inner wall of the sliding bracket (9) is provided with a sliding groove adapted to the sliding block (10).

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