Gear transmission multi-connection hydraulic lubricating pump with high reliability against vibration

Abstract

This invention discloses a vibration-resistant, highly reliable gear-driven multi-unit hydraulic lubrication pump, comprising a front pump body, a middle pump body, a rear pump body, a transition cover, and a rear cover. The front pump body has an oil inlet I, an oil inlet II, an oil outlet I, an oil outlet II, and an oil outlet III, as well as an oil passage I connecting the three oil outlets. The middle pump body has an oil inlet III and an oil passage II connecting the oil outlet II. The middle pump body, the rear pump body, and the transition cover together form an oil passage III connecting the oil inlet III and the oil outlet III. The middle pump body and the rear pump body share an oil inlet III, and the three oil outlets are integrated into the front pump body, forming a multi-unit integrated oil passage. The oil passage II of the middle pump body has two oblique holes for lubricating the external transmission parts. The oil passage III of the rear pump body has two oblique holes for lubricating the front pump bearing bushing, forming an independent zoned lubrication mechanism. This invention features vibration resistance, clear oil passages, reliable lubrication, compact structure, gear drive, and multi-unit integration.

Description

Technical Field

[0001] This invention relates to the field of hydraulic lubrication, and more particularly to a vibration-resistant, highly reliable gear-driven multi-stage hydraulic lubrication pump. Background Technology

[0002] A multiple gear pump is a hydraulic component that drives two or more independently operating gear pumps via a single drive shaft. All pumps are often housed within a single casing to achieve a compact structure and small size, facilitating the overall layout of the main unit. This pump uses a vacuum created on the disengaged side of the gears to draw in liquid, and the engaged side to squeeze and discharge the liquid. Structurally, it is divided into external gear pumps and internal gear pumps. The external gear pump consists of a driving gear, a driven gear, and a pump body, while the internal gear pump uses an internal gear coupled with a crescent-shaped partition.

[0003] The existing multi-gear hydraulic pumps have the following problems: 1) Fastening bolts are prone to fatigue, loosening and breaking under high-frequency vibration, resulting in pump body seal failure and leakage; 2) The oil passage layout of multiple pumps is chaotic, and oil crosstalk interference occurs, resulting in unstable oil supply pressure.

[0004] Therefore, it is necessary to develop new types of hydraulic lubrication pumps to overcome the above problems. Summary of the Invention

[0005] Purpose of the invention: To address the shortcomings and defects of existing technologies, this invention provides a vibration-resistant and highly reliable gear-driven multi-unit hydraulic lubrication pump, which features vibration resistance, clear oil passages, reliable lubrication, compact structure, gear transmission, and multi-unit integration.

[0006] Technical Solution: The present invention provides a vibration-resistant and highly reliable gear-driven multi-stage hydraulic lubrication pump, characterized in that it comprises a front pump body, a middle pump body, a rear pump body, a transition cover, and a rear cover; the front pump body is provided with an oil inlet I, an oil inlet II, an oil outlet I, an oil outlet II, and an oil outlet III, as well as an oil passage I connecting the three oil outlets; the middle pump body is provided with an oil inlet III and an oil passage II connecting the oil outlet II; the middle pump body, the rear pump body, and the transition cover together form an oil passage III connecting the oil inlet III and the oil outlet III; the middle pump body and the rear pump body share an oil inlet III, and the three oil outlets are integrated in the front pump body, forming a multi-stage integrated oil passage; the oil passage II of the middle pump body is provided with two oblique hole channels for lubrication of the external transmission parts; the oil passage III of the rear pump body is provided with two oblique hole channels for lubrication of the front pump bearing bushing, forming an independent zoned lubrication mechanism.

[0007] The transition cover has an elastic retaining ring in the bolt hole for locking and clamping the bolt, forming an anti-vibration fastening structure to prevent bolt breakage caused by high-frequency vibration.

[0008] The elastic retaining ring is fitted around the outer periphery of the fastening bolt and is engaged inside the step of the transition cover bolt hole to achieve axial limiting and radial vibration reduction.

[0009] Oil passage I, oil passage II, and oil passage III are independent of each other and correspond to the oil supply circuits of the front pump body, middle pump body, and rear pump body, respectively, and there is no cross-contamination of oil between them.

[0010] The inclined hole channel outlet of the middle pump body faces the external transmission gear meshing area and bearing position, while the inclined hole channel outlet of the rear pump body faces the front pump bearing bushing position.

[0011] The front pump body, middle pump body, and rear pump body are fitted with positioning stops and locked together with elastic retaining rings.

[0012] The front pump body, middle pump body, and rear pump body are equipped with a through transmission mechanism.

[0013] The transmission mechanism includes a driving shaft and a driven shaft.

[0014] The transmission mechanism further includes a front pump gear, a middle pump gear, a rear pump gear, and a transmission gear.

[0015] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: The present invention provides a vibration-resistant, highly reliable gear-driven multi-stage hydraulic lubrication pump through three major innovations: special fastening structure, special multi-stage oil passage design, and special lubrication mechanism. The pump features clear oil passages, reliable lubrication, compact structure, gear transmission, and multi-stage integration.

[0016] This invention features: 1) Vibration-resistant fastening: Elastic retaining rings limit vibration reduction, bolts are less prone to breakage and loosening, and sealing is reliable. 2) High-efficiency multi-channel oil passages: Independent oil passages, shared oil inlet and outlet integrated, stable pressure, no oil leakage, and easy installation. 3) Forced lubrication: Oblique hole fixed-point lubrication of bearings and transmission components, resulting in less wear, lower temperature rise, and longer service life. 4) Compact structure: Integrated design, small size, strong adaptability, suitable for harsh working conditions with strong vibration. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the arrangement structure of oil passage I, oil passage II, and oil passage III of the present invention; Figure 4 This is a schematic diagram of the structure of the elastic retaining ring of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the structure of the elastic retaining ring of the present invention. Figure 2 ; Figure 6 This is a schematic diagram of the structure of the elastic retaining ring of the present invention. Figure 3 ; In the diagram, 1 is the front pump body; 2 is the middle pump body; 3 is the rear pump body; 4 is the transition cover; 5 is the elastic retaining ring; 6 is the rear cover; 7 is oil passage I; 8 is oil passage II; 9 is oil passage III; 10 is oil inlet I; 11 is oil inlet II; 12 is oil inlet III; 13 is oil outlet I; 14 is oil outlet II; 15 is oil outlet III; and 16 is the transmission mechanism. Detailed Implementation

[0018] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] Example:

[0020] As shown in the figure, the vibration-resistant, high-reliability gear-driven multi-stage hydraulic lubrication pump of this embodiment includes: Pump body assembly: front pump body 1, middle pump body 2, rear pump body 3, transition cover 4, rear cover 6; Motion components: front pump gear, middle pump gear, rear pump gear, drive shaft, driven shaft, transmission gear; Fastening components: fastening bolts, elastic retaining rings 5.

[0021] Structure and working instructions: 1) Vibration-resistant and fastening structure: An elastic retaining ring 5 is installed inside the bolt hole of the transition cover 4. It is fitted around the outer circumference of the fastening bolt and clamped into the step inside the hole to achieve axial limiting and radial vibration reduction. During high-frequency vibration, the retaining ring buffers the impact and disperses stress, preventing bolt fatigue fracture and ensuring the sealing and rigidity of the pump body mating surface.

[0022] 2) Multi-connected integrated oil passage: Front pump oil passage I7: connects to oil inlet I10, oil inlet II11 → oil outlet I13; Medium pump oil passage II8: connects to oil inlet III12 → oil outlet II14; Rear pump oil passage Ⅲ9: connects to oil inlet Ⅲ12 → oil outlet Ⅲ15; The middle pump body 2 and the rear pump body 3 share the same oil inlet Ⅲ12, and all oil outlets are concentrated in the front pump body 1. The pipeline is simple, the pressure is stable, and there is no interference between them.

[0023] 3) Zoned lubrication mechanism: The inclined hole in the oil passage II of the intermediate pump is used to lubricate the external transmission gears and bearings. Rear pump oil passage III oblique hole → lubricates the front pump bearing bushing; Pressurized oil forces the lubrication points to carry away impurities and heat, reducing wear and extending service life.

[0024] The front pump body of this invention integrates multiple oil inlets and outlets, with integrated oil passages and a compact space. The transition cover bolt holes are equipped with elastic retaining rings to form an anti-vibration fastening structure, preventing bolts from loosening or breaking under high-frequency vibration. The middle pump body and rear pump body are equipped with dedicated oblique hole lubrication channels to force lubricate the external transmission components and the front pump bearing bushing, respectively. The invention adopts multiple independent oil passages with shared integrated oil inlet and outlet, improving oil supply efficiency and operational reliability, and is suitable for hydraulic and lubrication systems under strong vibration conditions.

Claims

1. A vibration-resistant, highly reliable gear-driven multi-stage hydraulic lubrication pump, characterized in that: The pump includes a front pump body (1), a middle pump body (2), a rear pump body (3), a transition cover (4), and a rear cover (6); the front pump body (1) is provided with an oil inlet I (10), an oil inlet II (11), an oil outlet I (13), an oil outlet II (14), and an oil outlet III (15), as well as an oil passage I (7) connecting the three oil outlets; the middle pump body (2) is provided with an oil inlet III (12), as well as an oil passage II (8) connecting the oil outlet II (14); the middle pump body (2), the rear pump body (3), the transition cover (4), and the rear cover (6) are all part of the pump body. The cover (4) together form an oil passage III (9) connecting the oil inlet III (12) and the oil outlet III (15); the middle pump body (2) and the rear pump body (3) share the oil inlet III (12), and the three oil outlets are integrated in the front pump body (1) to form a multi-connected integrated oil passage; the oil passage II (8) of the middle pump body (2) is provided with two oblique holes for lubrication of the external transmission part; the oil passage III (9) of the rear pump body (3) is provided with two oblique holes for lubrication of the front pump bearing bushing, forming an independent partition lubrication mechanism.

2. The vibration-resistant, high-reliability gear-driven multi-stage hydraulic lubrication pump according to claim 1, characterized in that: The transition cover (4) is provided with an elastic retaining ring (5) for fastening the bolts and limiting their position, forming an anti-vibration fastening structure to prevent high-frequency vibration from causing the bolts to break.

3. The vibration-resistant, high-reliability gear-driven multi-stage hydraulic lubrication pump according to claim 2, characterized in that: The elastic retaining ring (5) is fitted around the outer periphery of the fastening bolt and is locked inside the step of the bolt hole of the transition cover (4) to achieve axial limiting and radial vibration reduction.

4. The vibration-resistant, high-reliability gear-driven multi-stage hydraulic lubrication pump according to claim 1, characterized in that: The oil passages I (7), II (8), and III (9) are independent of each other and correspond to the oil supply circuits of the front pump body (1), the middle pump body (2), and the rear pump body (3), respectively, and do not cross-connect with each other.

5. The vibration-resistant, high-reliability gear-driven multi-stage hydraulic lubrication pump according to claim 1, characterized in that: The inclined hole channel outlet of the middle pump body (2) faces the meshing area of ​​the external transmission gear and the bearing position, and the inclined hole channel outlet of the rear pump body (3) faces the position of the front pump bearing bushing.

6. The vibration-resistant, high-reliability gear-driven multi-stage hydraulic lubrication pump according to claim 1, characterized in that: The front pump body (1), middle pump body (2), and rear pump body (3) are fitted with a positioning stop and locked together with an elastic retaining ring (5).

7. The vibration-resistant, high-reliability gear-driven multi-stage hydraulic lubrication pump according to claim 1, characterized in that: The front pump body (1), middle pump body (2), and rear pump body (3) are equipped with a through transmission mechanism (16).

8. The vibration-resistant, high-reliability gear-driven multi-stage hydraulic lubrication pump according to claim 7, characterized in that: The transmission mechanism (16) includes a driving shaft and a driven shaft.

9. The vibration-resistant and highly reliable gear-driven multi-stage hydraulic lubrication pump according to claim 8, characterized in that: The transmission mechanism (16) also includes a front pump gear, a middle pump gear, a rear pump gear, and a transmission gear.

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