Leakage-proof hydraulic oil pump

Abstract

The leakage-proof hydraulic oil pump comprises an oil pump shell, an oil pump cover body and an oil can, a butt joint groove is formed in the inner wall of a port of the oil pump shell, a butt joint ring inserted into the butt joint groove is arranged on the oil pump cover body, the inner wall of the butt joint ring is matched with the inner wall of the oil pump shell, and a plurality of grooves are formed between the inner wall of the butt joint ring and the inner wall of the oil pump shell. An abutting ring is connected to the inner wall of the oil pump shell in a sliding mode, an installation ring is fixedly connected to the inner wall of the oil pump shell, an elastic piece is arranged between the abutting ring and the installation ring, a ball screw is arranged at the position, opposite to the groove, of the outer wall of the abutting ring, and a steel ball of the ball screw is matched with the groove in an inserted mode. According to the leakproof hydraulic oil pump, the abutting ring is reliably positioned in the hydraulic oil pump through butt joint of the bead screws and the grooves, the phenomenon that the outgoing line abutting ring is loosened or displaced in the using process of the hydraulic oil pump is avoided, the sealing reliability between the oil pump cover body and the oil pump shell is guaranteed, and the leakage-proof performance of the oil pump is improved. And oil leakage of the hydraulic oil pump is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pump sealing, in particular to a leak-proof hydraulic oil pump. Background Art

[0002] Hydraulic oil pumps include vane pumps, gear pumps, piston pumps and screw pumps. Generally, vane pumps, gear pumps and piston pumps are used in the market. A hydraulic oil pump is a power component of a hydraulic system, and its function is to convert the mechanical energy of the prime mover into the pressure energy of the liquid. It refers to the oil pump in the hydraulic system, which provides power to the entire hydraulic system. It can be classified into piston pumps, gear pumps, vane scraper pumps, centrifugal pumps, etc. Existing hydraulic oil pumps usually use bolts to lock the oil pump cover and the oil pump housing, and a sealing rubber ring is used to seal the oil pump between the two. However, when the existing hydraulic oil pump transports oil, due to the large output pressure, it impacts the oil pump cover, and the sealing rubber ring between the oil pump cover and the oil pump housing is prone to displacement, resulting in oil leakage from the hydraulic oil pump. Summary of the Utility Model

[0003] The purpose of the utility model is to design a leak-proof hydraulic oil pump to solve the above-mentioned technical deficiencies. By docking each ball screw with each groove, the abutting ring is reliably positioned inside the hydraulic oil pump, preventing the abutting ring from loosening or displacing during the use of the hydraulic oil pump, ensuring the sealing reliability between the oil pump cover and the oil pump housing, and preventing oil leakage from the hydraulic oil pump.

[0004] To solve the above technical problems, the technical solution of the utility model is: a leak-proof hydraulic oil pump, including an oil pump housing, an oil pump cover, and an oil kettle. The first side of the oil pump cover is detachably connected to the oil kettle, and the second side of the oil pump cover is detachably connected to the oil pump housing. A docking groove is provided on the inner wall of the port of the oil pump housing, and a docking ring inserted into the docking groove is provided on the oil pump cover. The inner wall of the oil pump cover cooperates with the inner wall of the oil pump housing. The inner wall of the docking ring is adapted to the inner wall of the oil pump housing, and a plurality of grooves evenly distributed along the circumference of the port of the oil pump housing are provided between the two. An abutting ring is slidably connected to the inner wall of the oil pump housing, and an outwardly protruding mounting ring is fixedly connected to the inner wall of the oil pump housing. An elastic member is provided between the abutting ring and the mounting ring, so that the abutting ring translates along its axis and the abutting ring abuts tightly against the inner wall of the oil pump housing and the inner wall of the oil pump cover. Ball screws are provided at positions of the outer wall of the abutting ring relative to the grooves, and the steel balls of the ball screws are inserted and matched with the grooves.

[0005] Preferably, the inner diameter of the mounting ring is smaller than that of the abutting ring. The mounting ring is penetrated with a plurality of guiding holes uniformly distributed along its circumferential direction. The abutting ring is fixedly connected with a plurality of guiding rods uniformly distributed along its circumferential direction. Each guiding rod is respectively inserted into each guiding hole, and the inner wall of each guiding rod is adapted to the inner wall of the abutting ring.

[0006] Preferably, the elastic member is a spring structure, and the elastic member is sleeved on the annular structure formed by each guiding rod.

[0007] Preferably, the oil pump cover body is provided with a plurality of first mounting positions uniformly distributed along its circumferential direction, and the first mounting positions are fixedly connected with the oil pump housing through bolts.

[0008] Preferably, a pump shaft is arranged inside the oil pump housing. The pump shaft is coaxially arranged with the mounting ring. The oil pump cover body is penetrated with a mounting hole for the pump shaft to pass through.

[0009] Preferably, a sealing ring coaxially arranged with the mounting hole is embedded on the first side of the oil pump cover body. The inner diameter of the sealing ring is smaller than that of the mounting hole. An outer convex ring is formed on the outer side wall of the sealing ring. An oil delivery channel is formed on the end face of the pump shaft close to the sealing ring. The inner wall of the oil delivery channel is adapted to the inner wall of the sealing ring. The oil pot includes a pot body, a pot cover and a connecting member. An annular groove for the outer convex ring to be inserted is formed on the outer side wall of the pot body, so that the relative sides of the pot body and the sealing ring are in concave-convex fit. An installation groove communicated with its inner cavity is formed on the pot body. The pot cover covers the installation groove. The pot body is penetrated with a through hole coaxially arranged with the sealing ring. The connecting member sequentially passes through the through hole, the sealing ring and is detachably connected with the inner wall of the oil delivery channel. The connecting member is penetrated with a delivery channel communicated with the oil delivery channel.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] For a leak-proof hydraulic oil pump provided by the present utility model, under the action of the elastic member, the abutting ring has a tendency to extend outwards. After the oil pump cover body and the oil pump housing are connected through the docking groove and the docking ring, the inner wall of the oil pump cover body is matched with the inner wall of the oil pump housing. The abutting ring abuts against the inner walls of the oil pump housing and the oil pump cover body for sealing treatment. Through the docking of each ball screw and each groove, the abutting ring is reliably positioned inside the hydraulic oil pump, avoiding loosening or displacement of the abutting ring during the use of the hydraulic oil pump. The docking groove and the docking ring are matched and combined with the abutting ring to form a labyrinth seal contact, increasing the flow resistance and ensuring the sealing reliability between the oil pump cover body and the oil pump housing, preventing the hydraulic oil pump from leaking oil. Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of the hydraulic oil pump in the embodiment;

[0013] Figure 2 It is a cross-sectional view of the hydraulic oil pump in the embodiment.

[0014] In the figure: 1. Oil pump housing; 101. Docking groove; 102. Installation ring; 103. Guide hole; 2. Oil pump cover; 201. Docking ring; 202. First installation position; 203. Installation hole; 204. Sealing ring; 205. Outer convex ring; 3. Oil pot; 31. Pot body; 32. Pot cover; 33. Connecting piece; 301. Ring groove; 302. Installation groove; 303. Through hole; 304. Delivery channel; 305. Second installation position; 4. Groove; 5. Abutting ring; 501. Guide rod; 6. Elastic member; 7. Ball screw; 8. Pump shaft; 801. Oil delivery channel. Specific embodiments

[0015] The present utility model will be further described below through embodiments in conjunction with the accompanying drawings.

[0016] Refer to Figure 1 、 Figure 2 , a leak-proof hydraulic oil pump, including an oil pump housing 1, an oil pump cover 2, and an oil pot 3. The first side of the oil pump cover 2 is detachably connected to the oil pot 3, and the second side of the oil pump cover 2 is detachably connected to the oil pump housing 1. The oil pump cover 2 is provided with a plurality of first installation positions 202 evenly distributed along its circumference, and the first installation positions 202 are fixedly connected to the oil pump housing 1 through bolts.

[0017] The port of the oil pump housing 1 is communicated with its inner cavity, and an annular docking groove 101 is formed on the inner wall of the port of the oil pump housing 1. A docking ring 201 inserted into the docking groove 101 is provided on the oil pump cover 2, so as to guide the docking assembly between the oil pump cover 2 and the oil pump housing 1. Preferably, the oil pump cover 2 and the oil pump housing 1 are fixedly connected through bolts.

[0018] When the oil pump cover 2 is installed on the oil pump housing 1, the inner wall of the oil pump cover 2 cooperates with the inner wall of the oil pump housing 1. The inner wall of the docking ring 201 is adapted to the inner wall of the oil pump housing 1, and a plurality of grooves 4 evenly distributed along the circumference of the port of the oil pump housing 1 are formed between the two. An abutting ring 5 is slidably connected to the inner wall of the oil pump housing 1. An outwardly convex installation ring 102 is fixedly connected to the inner wall of the oil pump housing 1. The inner diameter of the installation ring 102 is smaller than the inner diameter of the abutting ring 5. A plurality of guide holes 103 evenly distributed along its circumference are formed through the installation ring 102. A plurality of guide rods 501 evenly distributed along its circumference are fixedly connected to the abutting ring 5. Each guide rod 501 is respectively inserted into each guide hole 103, and the inner wall of each guide rod 501 is adapted to the inner wall of the abutting ring 5, so as to guide the abutting ring 5 to translate along its axis.

[0019] An elastic member 6 is provided between the abutting ring 5 and the mounting ring 102. The elastic member 6 is a spring structure. The elastic member 6 is sleeved on the annular structure formed by each guide rod 501. Under the action of the elastic member 6, the abutting ring 5 translates outward along its axis and the abutting ring 5 abuts tightly against the inner wall of the oil pump housing 1 and the inner wall of the oil pump cover 2 for sealing.

[0020] A ball screw 7 is provided at the position of the outer wall of the abutting ring 5 relative to the groove 4. The steel ball of the ball screw 7 is inserted and matched with the groove 4. Through the docking of each ball screw 7 and each groove 4, the abutting ring 5 is reliably positioned inside the hydraulic oil pump, avoiding loosening or displacement of the abutting ring 5 during the use of the hydraulic oil pump. The docking groove 101 and the docking ring 201 are matched and combined with the abutting ring 5 to form a labyrinth seal contact, increasing the flow resistance and ensuring the sealing reliability between the oil pump cover 2 and the oil pump housing 1, preventing oil leakage of the hydraulic oil pump.

[0021] A pump shaft 8 is provided inside the oil pump housing 1. The pump shaft 8 is coaxially arranged with the mounting ring 102. The oil pump cover 2 is penetrated with a mounting hole 203 for the pump shaft 8 to pass through. A sealing ring 204 coaxially arranged with the mounting hole 203 is embedded on the first side of the oil pump cover 2. The inner diameter of the sealing ring 204 is smaller than the inner diameter of the mounting hole 203, and is used to block the connection between the mounting hole 203 and the pump shaft 8.

[0022] An outer convex ring 205 is formed on the outer side wall of the sealing ring 204. An oil delivery channel 801 is opened on the end face of the pump shaft 8 close to the sealing ring 204. The inner wall of the oil delivery channel 801 is adapted to the inner wall of the sealing ring 204. The oil pot 3 includes a pot body 31, a pot cover 32, and a connecting member 33. A ring groove 301 for inserting the outer convex ring 205 is opened on the outer side wall of the pot body 31, so that the relative sides of the pot body 31 and the sealing ring 204 are concavo-convexly matched. An installation groove 302 communicating with its inner cavity is opened on the pot body 31. The pot cover 32 is covered on the installation groove 302. Preferably, a plurality of second installation positions 305 evenly distributed along its circumference are provided on the pot cover 32. The second installation positions 305 and the pot body 31 are fixedly connected by bolts.

[0023] The pot body 31 is penetrated with a through hole 303 coaxially arranged with the sealing ring 204. The connecting member 33 sequentially passes through the through hole 303, the sealing ring 204 and is detachably connected to the inner wall of the oil delivery channel 801. The connecting member 33 is a bolt structure. The rod portion of the connecting member 33 is threadedly connected to the inner wall of the oil drainage channel, realizing the detachable connection between the oil pump cover 2 and the oil pot 3. Preferably, the connecting member 33 is penetrated with a delivery channel 304 communicating with the oil delivery channel 801, so that the hydraulic oil in the oil pot 3 is delivered to the inside of the hydraulic oil pump through the delivery channel 304 and the oil delivery channel 801.

[0024] Certainly, the above are only typical examples of the present utility model. In addition, the present utility model may have many other specific implementation manners. Any technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection required by the present utility model.

Claims

1. A leak-proof hydraulic oil pump, comprising an oil pump housing (1), an oil pump cover (2), and an oil pot (3). The first side of the oil pump cover (2) is detachably connected to the oil pot (3), and the second side of the oil pump cover (2) is detachably connected to the oil pump housing (1). It is characterized in that A docking groove (101) is provided on the inner wall of the port of the oil pump housing (1). A docking ring (201) inserted into the docking groove (101) is provided on the oil pump cover (2). The inner wall of the oil pump cover (2) cooperates with the inner wall of the oil pump housing (1). The inner wall of the docking ring (201) is adapted to the inner wall of the oil pump housing (1), and a plurality of grooves (4) evenly distributed along the circumference of the port of the oil pump housing (1) are provided therebetween. A butting ring (5) is slidably connected to the inner wall of the oil pump housing (1). An outwardly protruding mounting ring (102) is fixedly connected to the inner wall of the oil pump housing (1). An elastic member (6) is provided between the butting ring (5) and the mounting ring (102), so that the butting ring (5) translates along its axis and the butting ring (5) presses tightly against the inner wall of the oil pump housing (1) and the inner wall of the oil pump cover (2). A ball screw (7) is provided at a position of the outer wall of the butting ring (5) relative to the groove (4). The steel ball of the ball screw (7) is inserted and matched with the groove (4).

2. The anti-leak hydraulic oil pump according to claim 1, wherein, The inner diameter of the mounting ring (102) is smaller than the inner diameter of the butting ring (5). A plurality of guiding holes (103) evenly distributed along its circumference penetrate through the mounting ring (102). A plurality of guiding rods (501) evenly distributed along its circumference are fixedly connected to the butting ring (5). Each of the guiding rods (501) is respectively inserted into each of the guiding holes (103), and the inner wall of each of the guiding rods (501) is adapted to the inner wall of the butting ring (5).

3. The leak-proof hydraulic oil pump according to claim 2, characterized in that, The elastic member (6) is a spring structure. The elastic member (6) is sleeved on the annular structure formed by the guiding rods (501).

4. A leak-proof hydraulic oil pump according to claim 1, characterized in that, The oil pump cover (2) is provided with a plurality of first mounting positions (202) evenly distributed along its circumference. The first mounting positions (202) are fixedly connected to the oil pump housing (1) by bolts.

5. A leak-proof hydraulic oil pump according to claim 1, characterized in that, A pump shaft (8) is arranged inside the oil pump housing (1). The pump shaft (8) is coaxially arranged with the mounting ring (102). The oil pump cover (2) is penetrated with a mounting hole (203) for the pump shaft (8) to pass through.

6. A leak-proof hydraulic oil pump according to claim 5, characterized in that, A sealing ring (204) coaxially arranged with the mounting hole (203) is embedded on the first side of the oil pump cover body (2). The inner diameter of the sealing ring (204) is smaller than that of the mounting hole (203). An outer convex ring (205) is formed on the outer side wall of the sealing ring (204). An oil delivery channel (801) is formed on the end face of the pump shaft (8) close to the sealing ring (204). The inner wall of the oil delivery channel (801) is adapted to the inner wall of the sealing ring (204). The oil pot (3) includes a pot body (31), a pot cover (32), and a connecting member (33). A ring groove (301) for inserting the outer convex ring (205) is formed on the outer side wall of the pot body (31), so that the opposite sides of the pot body (31) and the sealing ring (204) are in concave-convex fit. The pot body (31) is provided with a mounting groove (302) communicating with its inner cavity. The pot cover (32) covers the mounting groove (302). The pot body (31) is penetrated with a through hole (303) coaxially arranged with the sealing ring (204). The connecting member (33) sequentially passes through the through hole (303), the sealing ring (204) and is detachably connected to the inner wall of the oil delivery channel (801). The connecting member (33) is penetrated with a delivery channel (304) communicating with the oil delivery channel (801).

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