Electric gear pump with spring oil pressing disc

Abstract

The utility model relates to an electric gear pump with a spring oil pressing disc, which comprises a pump seat, a vertical oil cylinder is arranged above the pump seat, a plurality of vertical screws are screwed on the pump seat around the oil cylinder, the screws penetrate through a top cover to be screwed and fixed with fastening nuts, the oil cylinder is clamped and fixed between the pump seat and the top cover, and an oil storage cavity is formed by the oil cylinder, the pump seat and the top cover in a surrounding manner. An oil pressing disc is inserted into the oil storage cavity, the outer ring of the oil pressing disc is pressed against the inner wall of the oil cylinder, a vertical guide column is inserted into the center of the oil pressing disc, and the upper end of the guide column is inserted and fixed on the top cover; the upper end and the lower end of the pressure spring are pressed against the top cover and the oil pressing disc respectively; an overflow exhaust assembly is arranged on the outer wall of the middle portion and the upper portion of the oil cylinder. The overflow exhaust assembly additionally arranged on the oil barrel of the lubricating pump can effectively prevent rainwater from entering the oil barrel while exhaust and air inlet are not affected; the overflow exhaust assembly is simple and compact in structure and convenient and fast to install.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of lubricating pump, more particularly to a kind of electric gear pump with spring oil press plate. BACKGROUND

[0002] In quantitative centralized lubrication system, electric lubricating pump is used as pump source to provide pressure lubricating oil. There are various forms of existing electric lubricating pump, one of which is electric lubricating pump with structure of oil tank above pump base. Oil filler port is provided on pump base, so that oil can be added into oil tank through oil filler hole. Spring is installed on the upper side of oil press plate in oil tank. The force of spring can press oil press plate to move downward, so as to realize automatic moving of lubricating oil in oil tank. However, when oil press plate moves downward, the upper part of oil tank becomes negative pressure, which can cause lubricating oil in the lower part of oil tank to flow over oil press plate. Therefore, some lubricating pumps are provided with air hole on the sidewall of the upper part of oil tank to balance air pressure. However, the existence of air hole can cause rainwater to enter into oil tank. In view of the problem, corresponding structure needs to be designed to realize waterproofing. SUMMARY

[0003] The utility model discloses a kind of electric gear pump with spring oil press plate, the overflow exhaust assembly additionally provided on the oil cylinder can effectively prevent rainwater from entering into oil cylinder while not affecting exhaust and intake.

[0004] A kind of electric gear pump with spring oil press plate, including pump base, the upper of pump base is equipped with vertical oil cylinder, the pump base on the periphery of oil cylinder is screwed with several vertical screw rods, screw rod is fixed with fastening nut by screwing through top cover, oil cylinder is clamped and fixed between pump base and top cover and is formed with oil storage cavity by being surrounded with pump base and top cover, oil press plate is inserted in oil storage cavity, the outer ring of oil press plate is pressed on the inner wall of oil cylinder, vertical guide column is inserted and fixed in the center of oil press plate, the upper end of guide column is inserted and fixed on top cover;Compression spring is inserted on guide column, the upper and lower ends of compression spring are pressed on top cover and oil press plate respectively;

[0005] Overflow exhaust assembly is arranged on the outer wall of middle and upper part of oil cylinder, and overflow exhaust assembly includes base plate abutting against oil cylinder, screw is inserted in the upper part of base plate, and screw is fixed on oil cylinder by screwing, annular positioning sleeve is formed on the outer end face of lower part of base plate, step hole is formed on the inner side of positioning sleeve of base plate, and pressure stabilizing hole is formed on the barrel wall of oil cylinder and is opposite to step hole;Rubber sealing element in the form of cap is inserted in step hole of base plate, cap-shaped clamping cover is sleeved on rubber sealing element, clamping cover is clamped in positioning sleeve of base plate and abuts against base plate, annular air passage is formed on the outer wall of clamping cover, and a plurality of small holes are formed on the inner wall of clamping cover and are communicated with air passage, and a plurality of air holes are formed on the positioning sleeve and are communicated with air passage.

[0006] The middle part of the rubber seal is formed with a "cross" shaped cut, which divides the middle part of the rubber seal into several fan-shaped rubber petals, and the adjacent rubber petals abut against each other; the outer ring of the rubber seal is formed with a sealing ring with a V-shaped cross section, the outer ring of the sealing ring abuts against the inner wall of the stepped hole, and the middle part of the sealing ring abuts against the end face of the clamping cover.

[0007] Preferably, the end face of the clamping cover is formed with an annular positioning groove, the middle part of the sealing ring is inserted into the positioning groove of the clamping cover; and an annular connecting ring is formed between the inner ring of the sealing ring and the outer ring of the rubber seal.

[0008] Preferably, the three air vent holes of the positioning sleeve are uniformly distributed in a ring shape around the central axis of the positioning sleeve, one of the air vent holes of the positioning sleeve is located at the bottom of the positioning sleeve, and the small hole on the clamping cover is located in a staggered manner with the air vent hole.

[0009] Preferably, the central axis of the oil cylinder, the central axis of the top cover, the central axis of the oil pressing disc and the central axis of the guide column coincide.

[0010] The screw rods are uniformly distributed in a ring shape around the central axis of the oil cylinder.

[0011] Preferably, the oil pressing disc comprises a sliding sleeve sleeved on the guide column, a pressing disc is fixedly connected to the sliding sleeve, a clamping plate in a ring shape is arranged below the outer ring of the pressing disc, the clamping plate is fixedly connected to the pressing disc through bolts, a rubber sealing gasket is clamped and fixed between the pressing disc and the clamping plate, and a conical sealing lip is formed on the outer ring of the rubber sealing gasket and abuts against the inner wall of the oil cylinder.

[0012] Preferably, an upper positioning groove in a ring shape is formed on the lower end face of the top cover, a lower positioning groove in a ring shape is formed on the upper end face of the pressing disc, and the two ends of the compression spring are respectively inserted into the upper positioning groove and the lower positioning groove.

[0013] Preferably, a vertical limiting column is inserted into the outer ring of the oil pressing disc, an upper positioning recess is formed on the lower end face of the top cover, a lower positioning recess is formed on the pump base, and the upper end and the lower end of the limiting column are respectively inserted into the upper positioning recess and the lower positioning recess.

[0014] Preferably, a limiting stop ring is formed on the outer wall of the middle part and the upper part of the limiting column, and the limiting stop ring is located on the lower side of the pressure stabilizing hole and is close to the pressure stabilizing hole.

[0015] The beneficial effects of the utility model lie in that:

[0016] The overflow exhaust assembly additionally arranged on the oil cylinder of the lubricating pump can effectively prevent rainwater from entering the oil cylinder without affecting the exhaust and the air intake, and the overflow exhaust assembly has a simple and compact structure and is convenient and fast to install. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0018] Figure 2 It is a structure schematic view of the utility model rear view;

[0019] Figure 3 It is a partial sectional view schematic view of the utility model side view;

[0020] Figure 4 It is Figure 3 The local enlarged structure schematic view of A in the middle;

[0021] Figure 5 It is a three-dimensional structure schematic view of the utility model upper rubber sealing element.

[0022] In the figure: 1, pump base;2, oil cylinder;3, motor mounting base;4, top cover;5, fastening nut;6, overflow exhaust assembly;7, screw;8, guide column;9, oil pressing disc;10, compression spring;20, limiting column;30, locking nut. Specific implementation:

[0023] Embodiment: see Figures 1 to 5 As shown in a kind of spring oil pressing disc electric gear pump of the utility model, including pump base 1, the upper portion of pump base 1 is equipped with vertical oil cylinder 2, several vertical screw rods 3 are screwed on the pump base 1 around oil cylinder 2, screw rod 3 is screwed and fixed with fastening nut 5 by passing through top cover 4, oil cylinder 2 is clamped and fixed between pump base 1 and top cover 4 and is formed with oil storage cavity by being surrounded with pump base 1 and top cover 4, oil storage cavity is inserted with oil pressing disc 9, the outer circle of oil pressing disc 9 is pressed on the inner wall of oil cylinder 2, vertical guide column 8 is inserted in the center, guide column 8 is inserted and fixed on the upper end of top cover 4, it is threaded stud 81 inserted in top cover 4, threaded stud 81 is formed on the upper end surface of guide column 8, the upper end surface of guide column 8 abuts on top cover 4, the upper end of threaded stud 81 extends top cover 4 and is screwed and fixed with locking nut 30;The compression spring 10 of guide column 8 is inserted and sleeved, and the upper and lower ends of compression spring 10 are pressed on top cover 4 and oil pressing disc 9 respectively;

[0024] An overflow exhaust assembly 6 is arranged on the outer wall of the upper part of the oil tank 2. The overflow exhaust assembly 6 comprises a base plate 61 abutting against the oil tank 2. The inner end surface of the base plate 61 is a circular arc surface, which is in close contact with the outer wall of the oil tank 2. A screw 7 is inserted into the upper part of the base plate 61 and is screwed and fixed to the oil tank 2. A circular annular positioning sleeve 611 is formed on the outer end surface of the lower part of the base plate 61. A stepped hole 612 is formed on the inner side of the base plate 61 in the positioning sleeve 611. A pressure stabilizing hole 21 is formed on the wall of the oil tank 2, which is opposite to the stepped hole 612. A cap-shaped rubber sealing element 63 is inserted into the stepped hole 612 in the base plate 61. A cap-shaped clamping cover 62 is sleeved on the rubber sealing element 63. The clamping cover 62 is clamped in the positioning sleeve 611 of the base plate 61 and abuts against the base plate 61. An annular air passage 621 is formed on the outer wall of the clamping cover 62. A plurality of small holes 622 are formed on the inner wall of the clamping cover 62, which are in communication with the air passage 621. A plurality of air holes 613 are formed on the positioning sleeve 611, which are in communication with the air passage 621.

[0025] A "cross" shaped cutting seam 631 is formed in the middle part of the rubber sealing element 63. The cutting seam 631 divides the middle part of the rubber sealing element 63 into a plurality of fan-shaped rubber petals. Adjacent rubber petals abut against each other. A V-shaped cross-section sealing ring 632 is formed on the outer circle of the rubber sealing element 63. The outer circle of the sealing ring 632 abuts against the inner wall of the stepped hole 612. The middle part of the sealing ring 632 abuts against the end surface of the clamping cover 62.

[0026] An annular positioning groove 623 is formed on the end surface of the clamping cover 62. The middle part of the sealing ring 632 is inserted into the positioning groove 623 of the clamping cover 62. A circular annular connecting ring 633 is formed between the inner circle of the sealing ring 632 and the outer circle of the rubber sealing element 63. The positioning groove 623 can position the rubber sealing element 63 and prevent the rubber sealing element 63 from moving. At the same time, the positioning groove 623 can increase the sealing contact surface and improve the sealing effect, thereby preventing rainwater from entering the oil tank 2 through the rubber sealing element 63.

[0027] There are three air holes 613 on the positioning sleeve 611, which are uniformly distributed in a ring shape around the central axis of the positioning sleeve 611. One of the air holes 613 in the positioning sleeve 611 is located at the bottom of the positioning sleeve 611. The small holes 622 on the clamping cover 62 are staggered with the air holes 613. The above hole distribution facilitates exhaust and effectively prevents rainwater from entering the clamping cover 62.

[0028] The central axis of the oil tank 2, the central axis of the top cover 4, the central axis of the oil pressing disc 9 and the central axis of the guide column 8 coincide with each other.

[0029] The screw rods 3 are uniformly distributed in a ring shape around the central axis of the oil tank 2.

[0030] The pressing oil disc 9 comprises a sliding sleeve 91 sleeved on the guide column 8, a pressing disc 92 fixedly connected on the sliding sleeve 91, a clamping plate 94 in the shape of a ring arranged below the outer ring of the pressing disc 92, and a rubber sealing gasket 93 fixedly clamped between the pressing disc 92 and the clamping plate 94, wherein the outer ring of the rubber sealing gasket 93 is formed with a conical sealing lip 931.

[0031] The lower end surface of the top cover 4 is formed with an upper positioning groove 411 in the shape of a ring, the upper end surface of the pressing disc 92 is formed with a lower positioning groove 921 in the shape of a ring, and the two ends of the compression spring 10 are respectively inserted into the upper positioning groove 411 and the lower positioning groove 921.

[0032] The outer ring of the pressing oil disc 9 is inserted with a vertical limiting column 20, the lower end surface of the top cover 4 is formed with an upper positioning hole 42, the pump base 1 is formed with a lower positioning hole 11, and the upper and lower ends of the limiting column 20 are respectively inserted into the upper positioning hole 42 and the lower positioning hole 11. Figure 3 As shown in the figure, the lower end of the guide column 8 is suspended, that is, the lower end of the guide column 8 is not constrained, and the limiting column 20 is additionally arranged, which is equivalent to adding a constraint to the pressing oil disc 9, thereby indirectly constraining the lower end of the guide column 8, and preventing the guide column 8 from being bent and deformed.

[0033] The outer wall of the middle and upper part of the limiting column 20 is formed with a limiting stop ring 201, the limiting stop ring 201 is located on the lower side of the pressure stabilizing hole 21 and is close to the pressure stabilizing hole 21, the limiting stop ring 201 can move upwards with the pressing oil disc 9, and thus when the pump base 1 adds oil into the oil cylinder 2, the lubricating oil will not overflow from the pressure stabilizing hole 21.

[0034] Working principle: the structure is an electric gear pump with a spring pressing oil disc, and the technical point is the overflow exhaust assembly 6. The overflow exhaust assembly 6 is provided with a positioning sleeve 611 and a clamping cover 62 matched with each other, the air passage groove 621 between the clamping cover 62 and the positioning sleeve 611 is matched with the small hole 622 and the air vent hole 613, and the cooperation can realize the entry and exit of gas. However, rainwater can enter through the air vent hole 613, but will flow downwards along the air passage groove 621, and finally be discharged from the air vent hole 613, thereby effectively realizing the first waterproofing.

[0035] At the same time, the overflow exhaust assembly 6 is provided with a rubber sealing element 63, and the slit 631 on the rubber sealing element 63 can be ventilated but cannot be water permeated, thereby serving as the second waterproofing measure in the overflow exhaust assembly 6, and effectively realizing waterproofing.

[0036] The embodiments are used to illustratively describe the utility model, and are not used to limit the utility model. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the utility model, and therefore the protection scope of the utility model should be as listed in the claims of the utility model.

Claims

1. A spring-loaded oil-pressing plate electric gear pump, comprising a pump base (1), a vertical oil cylinder (2) is arranged above the pump base (1), a plurality of vertical threaded rods (3) are screwed on the pump base (1) around the oil cylinder (2), a fastening nut (5) is screwed and fixed on the threaded rods (3) through a top cover (4), the oil cylinder (2) is clamped and fixed between the pump base (1) and the top cover (4) and is formed with an oil storage cavity together with the pump base (1) and the top cover (4), characterized in that: A pressing oil disc (9) is inserted in the oil storage cavity, the outer ring of the pressing oil disc (9) is pressed against the inner wall of the oil cylinder (2), a vertical guide column (8) is inserted in the center of the pressing oil disc (9), the upper end of the guide column (8) is inserted and fixed on the top cover (4), a compression spring (10) is inserted on the guide column (8), the upper and lower ends of the compression spring (10) are pressed against the top cover (4) and the pressing oil disc (9) respectively; An overflow exhaust assembly (6) is arranged on the outer wall of the middle and upper part of the oil cylinder (2), the overflow exhaust assembly (6) comprises a base plate (61) abutting against the oil cylinder (2), a screw (7) is inserted in the upper part of the base plate (61) and is screwed and fixed on the oil cylinder (2), a circular annular positioning sleeve (611) is formed on the outer end surface of the lower part of the base plate (61), a stepped hole (612) is formed on the inner side of the base plate (611) in the positioning sleeve (611), a pressure stabilizing hole (21) is formed on the cylinder wall of the oil cylinder (2) and is opposite to the stepped hole (612); a cap-shaped rubber sealing element (63) is inserted in the stepped hole (612) in the base plate (61), a cap-shaped clamping cover (62) is sleeved on the rubber sealing element (63), the clamping cover (62) is clamped in the positioning sleeve (611) of the base plate (61) and abuts against the base plate (61), an annular ventilation groove (621) is formed on the outer wall of the clamping cover (62), a plurality of small holes (622) are formed on the inner wall of the clamping cover (62) and are communicated with the ventilation groove (621), a plurality of ventilation holes (613) are formed on the positioning sleeve (611) and are communicated with the ventilation groove (621). A "cross" shaped cutting seam (631) is formed in the middle part of the rubber sealing element (63), the middle part of the rubber sealing element (63) is divided into a plurality of fan-shaped rubber petals by the cutting seam (631), and adjacent rubber petals abut against each other; a cross-section V-shaped sealing ring (632) is formed on the outer ring of the rubber sealing element (63), the outer ring of the sealing ring (632) abuts against the inner wall of the stepped hole (612), and the middle part of the sealing ring (632) abuts against the end surface of the clamping cover (62).

2. The electric gear pump with spring oil disc according to claim 1, characterized in that: An annular positioning groove (623) is formed on the end surface of the clamping cover (62), and the middle part of the sealing ring (632) is inserted in the positioning groove (623) of the clamping cover (62); a circular annular connecting ring (633) is formed between the inner ring of the sealing ring (632) and the outer ring of the rubber sealing element (63).

3. The electric gear pump with spring oil disc according to claim 1, characterized in that: The three ventilation holes (613) on the positioning sleeve (611) are annularly and uniformly distributed around the central axis of the positioning sleeve (611), one of the ventilation holes (613) in the positioning sleeve (611) is located at the bottom of the positioning sleeve (611), and the small holes (622) on the clamping cover (62) are located in a staggered manner with the ventilation holes (613).

4. The electric gear pump with spring oil disc according to claim 1, characterized in that: The central axes of the oil cylinder (2), the top cover (4), the pressing oil disc (9) and the guide column (8) coincide with each other; The plurality of screws (3) are annularly and uniformly distributed around the central axis of the oil cylinder (2).

5. The electric gear pump with spring loaded oil disc according to claim 4, characterized in that: The pressing oil disc (9) comprises a sliding sleeve (91) sleeved on the guide column (8), a pressing disc (92) is fixedly connected on the sliding sleeve (91), a circular clamping plate (94) is arranged below the outer ring of the pressing disc (92), the clamping plate (94) is fixedly connected with the pressing disc (92) through bolts, a rubber sealing gasket (93) is clamped and fixed between the pressing disc (92) and the clamping plate (94), a conical sealing lip (931) is formed on the outer ring of the rubber sealing gasket (93), and the sealing lip (931) is pressed against the inner wall of the oil cylinder (2).

6. An electric gear pump with spring loaded oil disc as claimed in claim 5 wherein: The lower end surface of the top cover (4) is formed with a circular upper positioning groove (411), the upper end surface of the pressing disc (92) is formed with a circular lower positioning groove (921), and the two ends of the compression spring (10) are respectively inserted into the upper positioning groove (411) and the lower positioning groove (921).

7. The electric gear pump with spring loaded oil disc of claim 4, wherein: The outer ring of the pressing oil disc (9) is inserted with a vertical limiting column (20), the lower end surface of the top cover (4) is formed with an upper positioning hole (42), the pump base (1) is formed with a lower positioning hole (11), and the upper and lower ends of the limiting column (20) are respectively inserted into the upper positioning hole (42) and the lower positioning hole (11).

8. The electric gear pump with spring oil disc according to claim 7, characterized in that: The outer wall of the middle and upper parts of the limiting column (20) is formed with a limiting stop ring (201), and the limiting stop ring (201) is located below the pressure stabilizing hole (21) and is close to the pressure stabilizing hole (21).

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