Motor pump of integrated oil cooling gear box

Abstract

The utility model discloses a motor pump of an integrated oil cooling gear box, which relates to the technical field of motor pumps, and comprises a casing, a motor cavity, an oil cavity and a pump head cavity are arranged in the casing; the casing is provided with a first sealing element on the annular side of the motor output shaft so as to isolate the motor cavity from the oil cavity; second sealing pieces are arranged on the portions, on the annular sides of the plungers, of the machine shell so as to isolate the oil cavity from the pump head cavity. The planetary gear reducing mechanism is used for replacing a large and small gear first-stage reducing structure, the motor and the planetary gear reducing mechanism are coaxially installed, space use is reduced, the oil cavity is isolated from the motor cavity and the pump head cavity through the first sealing piece and the second sealing piece, lubricating oil is arranged in the oil cavity, and the service life of the motor is prolonged. The integral lubrication and heat dissipation effects are achieved, the service life of parts is greatly prolonged, further, after the parts in the oil cavity are lubricated and cooled, the performance type selection of the parts can be slightly reduced, and cost reduction and efficiency improvement are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor pumps, in particular to a motor pump with an integrated oil-cooling gear box. Background Art

[0002] Existing motor pumps use a brushed series motor or induction motor as their power source, with a primary reduction gear system. A drive shaft drives the rotation of a swash plate, which is fitted with a plunger. The reciprocating motion of the plunger pressurizes the water. This design places the swash plate and plunger within an enclosed space (i.e., an oil cylinder) that stores liquid lubricant to lubricate and dissipate heat for moving components such as the plunger, swash plate, and bearings.

[0003] The above structure has the following problems:

[0004] 1. The large and small gears are externally meshed, resulting in an eccentricity in the center line, and the overall motor and pump body occupy a large space;

[0005] 2. The lubricating oil in the oil cylinder cannot lubricate the gears (reduction structure). The gears generate severe heat when running at high speed, resulting in increased losses and extremely high performance requirements for each component, which increases costs.

[0006] In view of this, there is an urgent need for a motor pump with an integrated oil-cooled gearbox. Utility Model Content

[0007] In view of the problems existing in the prior art, the present invention solves the problem with the following technical structure.

[0008] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0009] A motor pump with an integrated oil-cooled gearbox comprises: a housing, wherein a motor, a planetary gear reduction mechanism, a transmission shaft, a plurality of plungers, and a pump head assembly are disposed within the housing; a motor cavity, an oil cavity, and a pump head cavity are disposed within the housing, wherein lubricating oil is disposed within the oil cavity; the motor is disposed within the motor cavity; the planetary gear reduction mechanism and the transmission shaft are disposed within the oil cavity; a plurality of plunger cavities are disposed at the connection between the oil cavity and the pump head cavity; a plurality of plungers are slidably disposed in corresponding plunger cavities; and the pump head assembly is disposed in the pump head cavity;

[0010] The output shaft and the transmission shaft of the motor are respectively connected to the input end and the output end of the planetary gear reduction mechanism, and the transmission shaft drives the plurality of plungers to slide through the transmission assembly;

[0011] The housing is provided with a first seal on the ring side of the motor output shaft to isolate the motor cavity and the oil cavity;

[0012] The casing is provided with a second sealing member on the ring side of the plurality of plungers to isolate the oil cavity and the pump head cavity.

[0013] It is further characterized in that

[0014] The first sealing component includes a skeleton oil seal, and the skeleton oil seal is sleeved on the ring side of the motor output shaft.

[0015] The second sealing component includes a first oil seal, a water seal and a sealing bracket. The first oil seal, water seal and sealing bracket are all sleeved on the ring side of the plunger. The first oil seal and water seal are respectively arranged on the side of the sealing bracket close to the oil chamber and the pump head chamber.

[0016] The housing is provided with a first bearing on the ring side of the transmission shaft.

[0017] The transmission assembly includes a swash plate and a plane bearing. The swash plate is arranged at the end of the transmission shaft. The plane bearing is assembled on the swash plate. The axial directions of the plurality of plungers are arranged at the cross section of the plane bearing.

[0018] Each of the plungers is equipped with a reset assembly, and when the plunger moves to the low position of the swash plate, the reset assembly resets the plunger.

[0019] The reset assembly includes a reset spring, and the reset spring is sleeved on the plunger.

[0020] There are three plungers.

[0021] The pump head assembly includes a water inlet joint and a water outlet joint which are arranged on the casing.

[0022] A second bearing is provided at the output shaft of the motor.

[0023] The above structure of the utility model can achieve the following beneficial effects:

[0024] By replacing the large and small gear first-stage reduction structure with a planetary gear reduction mechanism, the motor and the planetary gear reduction mechanism can be coaxially installed as the motor and the pump head assembly, thereby reducing space usage. The oil chamber is isolated from the motor chamber and the pump head chamber by the first seal and the second seal, and lubricating oil is arranged in the oil chamber to achieve overall lubrication and heat dissipation, greatly improving the service life of components. Furthermore, after the components in the oil chamber are lubricated and heat dissipated, the performance selection of the components can be slightly reduced, thereby reducing costs and increasing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic cross-sectional view of the structure of this application;

[0026] Figure 2 This is a schematic cross-sectional view of the structure of the motor cavity in this application.

[0027] In the figure: 1. Motor; 2. Planetary gear reduction mechanism; 3. Drive shaft; 4. Plunger; 5. Skeleton oil seal; 6. First oil seal; 7. Water seal; 8. Seal bracket; 9. Swash plate; 10. Plane bearing; 11. Return spring; 12. First bearing; 13. Water inlet connector; 14. Water outlet connector; 15. Second bearing; 16. Water inlet check valve; 17. Water outlet check valve. DETAILED DESCRIPTION

[0028] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0029] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product or equipment that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products or equipment.

[0030] The following is combined with Figure 1 -Attached Figure 2 This application is described in further detail.

[0031] refer to Figure 1-2The motor pump of an integrated oil-cooled gearbox shown in the figure comprises: a casing, in which a motor 1, a planetary gear reduction mechanism 2, a transmission shaft 3, a plurality of plungers 4 and a pump head assembly are arranged; a motor cavity, an oil cavity and a pump head cavity are arranged in the casing, the oil cavity is provided with lubricating oil, the motor 1 is arranged in the motor cavity, the planetary gear reduction mechanism 2 and the transmission shaft 3 are arranged in the oil cavity, a plurality of plunger cavities are provided at the connection between the oil cavity and the pump head cavity, a plurality of plungers 4 are slidably arranged in the corresponding plunger cavities (in this embodiment, three plungers 4 are preferably provided, so three plunger cavities are provided), and the pump head assembly is provided in the pump head cavity; the output shaft of the motor 1 and the transmission shaft 3 are respectively connected to the input end and the output end of the planetary gear reduction mechanism 2 (specifically, the transmission shaft 3 is connected to the planetary carrier of the planetary gear reduction mechanism 2), and the transmission shaft 3 drives the plurality of plungers 4 to slide through the transmission assembly; the casing is A first seal is provided on the annular side of the output shaft of the motor 1 to isolate the motor cavity and the oil cavity; a second seal is provided on the annular side of the plurality of plungers 4 of the casing to isolate the oil cavity and the pump head cavity. In this way, the motor 1, the planetary gear reduction mechanism 2 and the pump head assembly are integrated into one body through the casing (the casing is formed by connecting the various parts in sections), and the planetary gear reduction mechanism 2 replaces the large and small gears in the first-stage reduction structure, so that the motor 1 (preferably a brushless motor) and the planetary gear reduction mechanism 2 can realize the coaxial installation of the motor 1 and the pump head assembly, reducing space usage, and the oil cavity is isolated from the motor cavity and the pump head cavity by the first seal and the second seal, and lubricating oil is set in the oil cavity to achieve the effect of overall lubrication and heat dissipation, greatly improving the service life of components. Furthermore, after the components in the oil cavity are lubricated and heat dissipated, the performance selection of the components can be slightly reduced, thereby achieving cost reduction and efficiency improvement.

[0032] Further optimization is, Figure 1 As shown, the first sealing component specifically includes a skeleton oil seal 5, which is sleeved on the ring side of the output shaft of the motor 1 to prevent the lubricating oil in the oil chamber from entering the motor 1. Of course, a high-performance O-ring can also be used to make the structure simpler and the cost lower.

[0033] Further optimization is, Figure 1 As shown, the second sealing component specifically includes a first oil seal 6, a water seal 7 and a sealing bracket 8. The first oil seal 6, the water seal 7 and the sealing bracket 8 are all sleeved on the ring side of the plunger 4. The first oil seal 6 and the water seal 7 are respectively arranged on the side of the sealing bracket 8 close to the oil chamber and the pump head chamber. In this way, the first oil seal 6 can prevent the lubricating oil in the oil chamber from entering the pump head chamber, and the water seal 7 can prevent the water in the pump head chamber from entering the oil chamber.

[0034] like Figure 1As shown, in order to stably support the movement of the transmission shaft 3, the casing is provided with a first bearing 12 on the ring side of the transmission shaft 3. The transmission shaft 3 is supported and limited by the first bearing 12, and the friction between the transmission shaft 3 and the casing is reduced. Similarly, a second bearing 15 is provided at the output shaft of the motor 1.

[0035] like Figure 1 As shown, the transmission assembly includes a swash plate 9 and a plane bearing 10. Specifically, the end of the transmission shaft 3 is connected to the swash plate 9, and the plane bearing 10 is assembled on the swash plate 9. The axial directions of the three plungers 4 are set at the cross section of the plane bearing 10, and each plunger is equipped with a useful reset component (preferably a reset spring, which is sleeved on the plunger 4). When the plunger 4 moves to the low position of the swash plate 9, the reset spring 11 resets the plunger 4. When the swash plate 9 moves to the high position, the reset spring 9 is compressed.

[0036] like Figure 1 As shown, a pump head assembly is assembled on one side of the oil cylinder. The pump head assembly includes a pump body, a pump cover, a one-way valve, a water seal, an oil seal, a water inlet connector 13, a water outlet connector 14, and various sealing rings. Each plunger 4 is provided with independent water inlet and outlet pipes. When the plunger 4 moves backward, the water inlet one-way valve 16 opens and the water outlet one-way valve 17 closes, allowing low-pressure water to flow into the plunger cavity. When the plunger 4 moves forward, the water inlet one-way valve 16 closes and the water outlet one-way valve 17 opens, compressing the water in the plunger cavity to form a high-pressure water flow. The entire pump head assembly is equipped with sealing rings at the joints of each component to achieve a water seal and prevent leakage.

[0037] The working principle of the present invention is as follows: the motor 1, the planetary gear reduction mechanism 2 and the pump head assembly are integrated into one body through the casing, and the planetary gear reduction mechanism 2 replaces the large and small gear first-stage reduction structure, so that the motor 1 and the planetary gear reduction mechanism 2 realize the coaxial installation of the motor 1 and the pump head assembly, reducing space usage, and the oil chamber is isolated from the motor chamber and the pump head chamber by the first seal and the second seal, and lubricating oil is arranged in the oil chamber to achieve the effect of overall lubrication and heat dissipation, greatly improving the service life of components. Furthermore, after the components in the oil chamber are lubricated and heat dissipated, the performance selection of the components can be slightly reduced, thereby achieving cost reduction and efficiency improvement.

[0038] The above are only preferred embodiments of the present application, and the present invention is not limited to the above embodiments. It is understood that other improvements and variations directly derived or imagined by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included in the scope of protection of the present invention.

Claims

1. A motor pump with an integrated oil-cooled gearbox, characterized in that: include: A housing, wherein a motor (1), a planetary gear reduction mechanism (2), a transmission shaft (3), a plurality of plungers (4) and a pump head assembly are arranged in the housing; a motor cavity, an oil cavity and a pump head cavity are arranged in the housing, lubricating oil is arranged in the oil cavity, the motor (1) is arranged in the motor cavity, the planetary gear reduction mechanism (2) and the transmission shaft (3) are arranged in the oil cavity, a plurality of plunger cavities are arranged at the connection between the oil cavity and the pump head cavity, a plurality of plungers (4) are slidably arranged in the corresponding plunger cavities, and the pump head assembly is arranged in the pump head cavity; The output shaft and the transmission shaft (3) of the motor (1) are respectively connected to the input end and the output end of the planetary gear reduction mechanism (2), and the transmission shaft (3) drives the plurality of plungers (4) to slide through the transmission assembly; The housing is provided with a first sealing member on the ring side of the output shaft of the motor (1) to isolate the motor cavity and the oil cavity; The casing is provided with a second sealing member on the ring side of a plurality of plungers (4) to isolate the oil cavity and the pump head cavity.

2. The motor pump of the integrated oil-cooled gearbox according to claim 1, characterized in that: The first sealing component comprises a skeleton oil seal (5), and the skeleton oil seal (5) is sleeved on the ring side of the output shaft of the motor (1).

3. The motor pump of the integrated oil-cooled gearbox according to claim 1, characterized in that: The second sealing member comprises a first oil seal (6), a water seal (7) and a sealing bracket (8); the first oil seal (6), the water seal (7) and the sealing bracket (8) are all sleeved on the ring side of the plunger (4); the first oil seal (6) and the water seal (7) are respectively arranged on one side of the sealing bracket (8) close to the oil chamber and the pump head chamber.

4. The motor pump of the integrated oil-cooled gearbox according to claim 1, characterized in that: The housing is provided with a first bearing (12) on the ring side of the transmission shaft (3).

5. The motor pump of the integrated oil-cooled gearbox according to claim 1, characterized in that: The transmission assembly comprises a swash plate (9) and a plane bearing (10). The swash plate (9) is arranged at the end of the transmission shaft (3). The plane bearing (10) is assembled on the swash plate (9). The axial directions of the plurality of plungers (4) are arranged at the cross section of the plane bearing (10).

6. The motor pump of the integrated oil-cooled gearbox according to claim 5, characterized in that: Each plunger (4) is equipped with a reset assembly, and when the plunger (4) moves to the low position of the swash plate (9), the reset assembly resets the plunger (4).

7. The motor pump of the integrated oil-cooled gearbox according to claim 6, characterized in that: The reset assembly comprises a reset spring (11), and the reset spring (11) is sleeved on the plunger (4).

8. The motor pump of the integrated oil-cooled gearbox according to claim 7, characterized in that: Three plungers (4) are provided.

9. The motor pump of the integrated oil-cooled gearbox according to claim 7, characterized in that: The pump head assembly comprises a water inlet joint (13) and a water outlet joint (14) arranged on the casing.

10. The motor pump of the integrated oil-cooled gearbox according to claim 1, characterized in that: A second bearing (15) is provided at the output shaft of the motor (1).

Images