Oil pump capable of efficiently feeding oil and easy to install

Abstract

The oil pump comprises a pump body, a pump cover and a gear seat which are sequentially connected, an inner gear set used for conveying engine oil is arranged between the pump body and the pump cover, an inner cavity with an opening facing the pump cover is formed in the pump body, and a liquid inlet hole and a liquid outlet hole which are used for conveying media are formed in the two sides of the inner cavity. The gear seat is provided with an outer gear set used for driving the inner gear set, the pump cover is provided with a first flow channel communicated with the inner cavity, and the gear seat is provided with a second flow channel used for connecting the first flow channel and the outer gear set. When the gear pump works, part of engine oil flows to the outer gear set along the first flow channel and the second flow channel, so that the engine oil lubricates the inner gear set and the outer gear set at the same time, the transmission efficiency of the gear pump is kept, and the service life is prolonged; the pump body, the inner gear set, the pump cover, the gear seat and the outer gear set are installed in a cake stacking mode, the installation mode is simplified, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pump bodies, in particular to an oil pump with high efficiency in oil delivery and easy installation. Background Art

[0002] The oil pump is a commonly used pump body in the lubrication system. Its function is to increase the oil to a certain pressure and then force it to the moving surfaces of various parts of the engine. The traditional gear oil pump is composed of an oil pump body, a rotating shaft, gears, a rotating shaft and other accessories. The gear meshing forms a pressure difference at both ends of the oil pump body, thereby achieving the purpose of conveying oil. In order to maintain the transmission efficiency of the oil pump, it is necessary to set a structure for conveying oil at the connection of each rotating shaft, which leads to an increase in the number of spare parts of the oil pump, which increases the number of installation steps of the oil pump, and affects the assembly efficiency of the oil pump. Summary of the invention

[0003] In order to overcome the shortcomings of the background technology, the technical solution adopted by the utility model is: an efficient oil delivery and easy-to-install oil pump, comprising a pump body, a pump cover and a gear seat connected in sequence, an internal gear group for conveying oil is provided between the pump body and the pump cover, an inner cavity with an opening facing the pump cover is provided in the pump body, and a liquid inlet and a liquid outlet are provided on both sides of the inner cavity for transmitting the medium, an outer gear group for transmitting the internal gear group is provided on the gear seat, the pump cover is provided with a first flow channel connected to the inner cavity, and the gear seat is provided with a second flow channel for connecting the first flow channel and the outer gear group.

[0004] By adopting the above technical solution, the motor controls the rotation of the internal gear group through the external gear group. The rotation of the internal gear group drives the oil at the liquid inlet hole to flow toward the liquid outlet hole, and part of the oil flows to the outer gear group along the first flow channel and the second flow channel, so that the oil lubricates the internal gear group and the outer gear group at the same time, maintaining the transmission efficiency of the gear pump and improving its service life. During installation, the pump body, internal gear group, pump cover, gear seat and external gear group are installed in a stacked cake manner to simplify the installation structure and improve assembly efficiency.

[0005] The utility model is further configured that the internal gear set includes a rotating shaft and a transmission shaft, and an internal pressure gear respectively connected to the rotating shaft and the transmission shaft through a key, and the two internal pressure gears are meshed and connected with each other.

[0006] Furthermore, the pump body and the pump cover are provided with a first rotation groove and a second rotation groove which are coaxially distributed, and both ends of the rotating shaft / transmission shaft are rotationally connected between the pump body and the pump cover through the first rotation groove and the second rotation groove respectively.

[0007] Furthermore, the external gear set includes a driven gear and a driving gear, the transmission shaft extends outward through the second rotation groove, the driven gear key is connected to the transmission shaft, the gear seat is provided with a mounting portion, the driving gear is rotatably connected to the gear seat through the mounting portion, and the driving gear is meshingly connected to the driven gear.

[0008] By adopting the above technical solution, the transmission shaft is longer than the rotating shaft, and both are connected to the first rotating groove and the second rotating groove through the shaft sleeve. The extended part of the transmission shaft is connected to the driven gear through a key, and the driving gear is connected to the gear seat through the shaft sleeve and fixed by screws, so that the driven gear and the driving gear are in a meshing state. The overall structural design is reasonable and easy to install.

[0009] The utility model is further configured as follows: the pump cover is provided with a first adapter hole facing perpendicular to the first flow channel, one end of the first flow channel is connected to the second rotating groove, and the other end is provided with a first cylindrical pin, the gear seat is provided with a second adapter hole, one end of the second flow channel is connected to the first adapter hole, and the other end is provided with a second cylindrical pin, and the second flow channel extends to the connection between the driving gear and the gear seat through the second adapter hole.

[0010] By adopting the above technical scheme, two perpendicular holes are punched on the pump cover to form a first flow channel and a first transfer hole, and two perpendicular holes and an oblique hole are punched on the surface of the pump cover to form a second flow channel and a second transfer hole. After punching the holes, the first flow channel and the second flow channel are blocked by the first cylindrical pin and the second cylindrical pin respectively to prevent oil leakage. During operation, the oil in the inner cavity flows from the second rotating groove through the first flow channel, the first transfer hole, the second flow channel, and the second transfer hole to the driving gear in sequence, thereby playing a role in lubricating the driving gear.

[0011] The utility model is further configured such that the pump cover is provided with a positioning portion at the transmission shaft, the gear seat is clamped on the pump cover through the positioning portion, and a fastening screw is provided at the bottom of the pump body, which passes through the pump body and the pump cover and is threadedly connected to the gear seat in sequence.

[0012] By adopting the above technical solution, the gear seat is provided with a threaded hole corresponding to the fastening screw, and the upper end of the gear seat is fixed on the pump cover through the positioning part, so that the axial distance between the positioning part and the mounting part is fixed, so that the driven gear and the driving gear are naturally meshed after installation, thereby improving the installation efficiency.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. When the gear pump is working, part of the oil flows along the first flow channel and the second flow channel to the outer gear set, so that the oil lubricates the inner gear set and the outer gear set at the same time, maintaining the transmission efficiency of the gear pump and improving its service life;

[0015] 2. During installation, the pump body, internal gear set, pump cover, gear seat and external gear set are installed in a cake-like manner to simplify the installation method and improve assembly efficiency.

[0016] The embodiments of the utility model are further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the front view of the utility model;

[0018] Figure 2 For the utility model Figure 1 The stepped section view of the A direction view;

[0019] Figure 3 For the utility model Figure 2 A partial enlarged view of the B direction view;

[0020] Figure 4 It is a cross-sectional view of the pump body of the utility model;

[0021] Wherein: 1 - pump body, 2 - pump cover, 3 - gear seat, 4 - internal gear set, 5 - external gear set, 11 - inner cavity, 12 - liquid inlet hole, 13 - liquid outlet hole, 14 - first rotating groove, 15 - fastening screw, 21 - second rotating groove, 22 - first cylindrical pin, 23 - positioning part, 31 - mounting part, 32 - second cylindrical pin, 41 - rotating shaft, 42 - transmission shaft, 43 - internal pressure gear, 51 - driven gear, 52 - driving gear, 100 - first flow channel, 101 - first transfer hole, 102 - second flow channel, 103 - second transfer hole; DETAILED DESCRIPTION

[0022] like Figure 1 , 2 As shown in Figure 4, the utility model provides an efficient oil delivery and easy-to-install oil pump, including a pump body 1, a pump cover 2 and a gear seat 3 connected in sequence, an internal gear set 4 for conveying oil is provided between the pump body 1 and the pump cover 2, an inner cavity 11 with an opening toward the pump cover 2 is provided in the pump body 1, and a liquid inlet hole 12 and a liquid outlet hole 13 for transmitting a medium are provided on both sides of the inner cavity 11, an outer gear set 5 for transmitting the inner gear set 4 is provided on the gear seat 3, the pump cover 2 is provided with a first flow channel 100 connected to the inner cavity 11, and the gear seat 3 is provided with a second flow channel 102 for connecting the first flow channel 100 and the outer gear set 5.

[0023] In this embodiment, the internal gear set 4 includes a rotating shaft 41 and a transmission shaft 42, and an internal pressure gear 43 connected to the rotating shaft 41 and the transmission shaft 42 respectively by a key, and the two internal pressure gears 43 are meshed and connected with each other. The pump body 1 and the pump cover 2 are provided with a first rotating groove 14 and a second rotating groove 21 distributed coaxially. The two ends of the rotating shaft 41 / the transmission shaft 42 are respectively rotatably connected between the pump body 1 and the pump cover 2 through the first rotating groove 14 and the second rotating groove 21. The external gear set 5 includes a driven gear 51 and a driving gear 52. The transmission shaft 42 extends outward through the second rotating groove 21. The driven gear 5 1 is connected to the transmission shaft 42 with a key, the gear seat 3 is provided with a mounting portion 31, the driving gear 52 is rotatably connected to the gear seat 3 through the mounting portion 31, and the driving gear 52 is meshedly connected to the driven gear 51, the transmission shaft 42 is longer than the rotating shaft 41, both are connected to the first rotating groove 14 and the second rotating groove 21 through a sleeve, the extended portion of the transmission shaft 42 is connected to the driven gear 51 through a key, the driving gear 52 is connected to the gear seat 3 through a sleeve, and is fixed by screws, so that the driven gear 51 and the driving gear 52 are in a meshing state, the overall structural design is reasonable and easy to install.

[0024] Combination Figure 3 As shown, in this embodiment, the pump cover 2 is provided with a first transfer hole 101 which is perpendicular to the first flow channel 100, one end of the first flow channel 100 is connected with the second rotating groove 21, and the other end is provided with a first cylindrical pin 22, the gear seat 3 is provided with a second transfer hole 103, one end of the second flow channel 102 is connected with the first transfer hole 101, and the other end is provided with a second cylindrical pin 32, the second flow channel 102 extends to the connection between the driving gear 52 and the gear seat 3 through the second transfer hole 103, two perpendicular holes are punched in the pump cover 2 to form the first flow channel 100 and the first transfer hole 101, two perpendicular holes and an oblique hole are punched on the surface of the pump cover 2 to form the second flow channel 102 and the second transfer hole 103, and after punching, the first flow channel 100 and the second flow channel 102 are blocked by the first cylindrical pin 22 and the second cylindrical pin 32 respectively to prevent oil leakage.

[0025] In this embodiment, the pump cover 2 is provided with a positioning portion 23 at the transmission shaft 42, and the gear seat 3 is clamped on the pump cover 2 through the positioning portion 23. A fastening screw 15 is provided at the bottom of the pump body 1. The fastening screw 15 passes through the pump body 1 and the pump cover 2 in sequence and is threadedly connected to the gear seat 3. The gear seat 3 is provided with a threaded hole corresponding to the fastening screw 15. The upper end of the gear seat 3 is fixed to the pump cover 2 through the positioning portion 23, so that the axial distance between the positioning portion 23 and the mounting portion 31 is fixed, so that the driven gear 51 and the driving gear 52 are naturally meshed after installation, thereby improving the installation efficiency.

[0026] The working principle of the utility model is that the liquid inlet holes 12 and the liquid outlet holes 13 on both sides of the pump body 1 are respectively connected to external pipes, and the motor drives the driven gear 51 and the transmission shaft 42 to rotate through the driving gear 52, so that the two internal pressure gears 43 inside the pump body 1 are meshed and rotated, thereby driving the engine oil at the liquid inlet hole 12 to flow toward the liquid outlet hole 13; when the hydraulic pump is working, the engine oil in the inner cavity 11 flows from the second rotating groove 21 to the driving gear 52 through the first flow channel 100, the first adapter hole 101, the second flow channel 102, and the second adapter hole 103 in sequence, thereby playing a role in lubricating the driving gear 52 and improving its service life.

[0027] In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. An oil pump with high efficiency and easy installation, characterized in that: The invention comprises a pump body (1), a pump cover (2) and a gear seat (3) which are connected in sequence; an internal gear set (4) for conveying engine oil is arranged between the pump body (1) and the pump cover (2); an inner cavity (11) opening toward the pump cover (2) is arranged in the pump body (1); a liquid inlet (12) and a liquid outlet (13) for conveying a medium are arranged on both sides of the inner cavity (11); an outer gear set (5) for transmitting the inner gear set (4) is arranged on the gear seat (3); the pump cover (2) is provided with a first flow channel (100) communicating with the inner cavity (11); and the gear seat (3) is provided with a second flow channel (102) for connecting the first flow channel (100) and the outer gear set (5).

2. The high-efficiency oil delivery and easy-to-install oil pump according to claim 1, characterized in that: The internal gear set (4) comprises a rotating shaft (41) and a transmission shaft (42), and an internal pressure gear (43) respectively connected to the rotating shaft (41) and the transmission shaft (42) through a key, and the two internal pressure gears (43) are meshed and connected with each other.

3. The high-efficiency oil delivery and easy-to-install oil pump according to claim 2 is characterized in that: The pump body (1) and the pump cover (2) are provided with a first rotating groove (14) and a second rotating groove (21) which are coaxially distributed, and the two ends of the rotating shaft (41) / transmission shaft (42) are rotationally connected between the pump body (1) and the pump cover (2) through the first rotating groove (14) and the second rotating groove (21) respectively.

4. The high-efficiency oil delivery and easy-to-install oil pump according to claim 3 is characterized in that: The external gear set (5) comprises a driven gear (51) and a driving gear (52); the transmission shaft (42) extends outward through the second rotation groove (21); the driven gear (51) is key-connected to the transmission shaft (42); the gear seat (3) is provided with a mounting portion (31); the driving gear (52) is rotationally connected to the gear seat (3) through the mounting portion (31); and the driving gear (52) is meshingly connected to the driven gear (51).

5. The high-efficiency oil delivery and easy-to-install oil pump according to claim 4 is characterized in that: The pump cover (2) is provided with a first transfer hole (101) which is perpendicular to the first flow channel (100); one end of the first flow channel (100) is connected to the second rotating groove (21), and the other end is provided with a first cylindrical pin (22); the gear seat (3) is provided with a second transfer hole (103); one end of the second flow channel (102) is connected to the first transfer hole (101), and the other end is provided with a second cylindrical pin (32); the second flow channel (102) extends through the second transfer hole (103) to the connection between the driving gear (52) and the gear seat (3).

6. An efficient oil delivery and easy-to-install oil pump according to any one of claims 1-5, characterized in that: The pump cover (2) is provided with a positioning portion (23) at the transmission shaft (42), the gear seat (3) is clamped to the pump cover (2) through the positioning portion (23), and the bottom of the pump body (1) is provided with a fastening screw (15), which passes through the pump body (1) and the pump cover (2) in sequence and is threadedly connected to the gear seat (3).

Images