Pump housing for an engine gearbox oil pump

Abstract

The application relates to the technical field of automobile accessories, and relates to a pump shell of an engine gearbox oil pump, which comprises a lower pump shell, a pump cover, an impeller, a transmission component and a connecting shaft, the lower pump shell is provided with a first communication hole, the connecting shaft is coaxially and rotatably embedded in the first communication hole, one side of the lower pump shell along the axis direction of the connecting shaft is provided with a containing cavity, the pump cover is connected to the lower pump shell and covers the cavity opening of the containing cavity, an oil inlet and an oil outlet are arranged at the cavity wall of the containing cavity, the oil inlet and the oil outlet are connected with the outside, the impeller is rotatably embedded in the containing cavity, and the transmission component is connected between the connecting shaft and the impeller. The connecting shaft rotates, drives the impeller in the containing cavity to rotate through the transmission component, sucks oil from the oil inlet, and sends out the oil from the oil outlet. The structure makes the overall structure of the oil pump compact, reduces the number of parts, and improves the space utilization rate of the oil pump and the gearbox.

Description

Technical Field

[0001] This application relates to the technical field of automotive parts, and in particular to a pump housing for an engine transmission oil pump. Background Technology

[0002] The transmission is a critical component of a car, and the transmission oil pump is its heart. During transmission operation, the oil pump pumps oil to cool, lubricate, transmit power, and clean the transmission. The performance of the oil pump directly affects the operation of the transmission.

[0003] Currently, to achieve the lubrication and cooling functions of transmissions, the industry generally adopts an independently installed oil pump solution. Specifically, common methods include fixing the oil pump to the outside of the transmission housing with a bracket, or directly connecting it to the transmission housing via a flange, resulting in a large number of components and insufficient axial space. Summary of the Invention

[0004] In order to improve the stability of the connection between the oil pump and the transmission housing and to improve the overall space utilization of the transmission, this application provides a pump housing for an engine transmission oil pump.

[0005] The pump housing of the engine transmission oil pump provided in this application adopts the following technical solution:

[0006] A pump housing for an engine transmission oil pump includes a lower pump housing, a pump cover, an impeller, a transmission component, and a connecting shaft. The lower pump housing has a first communicating hole, and the connecting shaft is coaxially rotatably embedded in the first communicating hole. The lower pump housing has a receiving cavity on one side along the axis of the connecting shaft. The pump cover is connected to the lower pump housing and covers the opening of the receiving cavity. The receiving cavity wall has an oil inlet and an oil outlet, which are connected to the outside. The impeller is rotatably embedded in the receiving cavity, and the transmission component is connected between the connecting shaft and the impeller.

[0007] By adopting the above technical solution, the connecting shaft rotates, and the transmission components drive the impeller in the receiving cavity to rotate, drawing oil from the oil inlet and then sending it out from the oil outlet. This structure makes the overall structure of the oil pump more compact, reduces the number of parts, and improves the space utilization of the oil pump and gearbox.

[0008] Preferably, the cross-sectional area of ​​the oil inlet is larger than the cross-sectional area of ​​the oil outlet.

[0009] By adopting the above technical solution, the cross-sectional area of ​​the oil inlet is larger than that of the oil outlet. At the same time, the oil pressure flowing out of the oil outlet is greater than that entering from the oil inlet. The increased oil pressure at the oil outlet helps the oil to quickly reach the required area, thereby improving the working performance and reliability of the oil pump.

[0010] Preferably, the system further includes an upper pump housing. The lower pump housing has several mounting cavities on the side away from the pump cover, which are used for piston insertion. The outer periphery of the lower pump housing away from the pump cover has an annular groove with several oil delivery channels at the bottom of the groove. The oil delivery channels are connected to the mounting cavities. The lower pump housing has a connecting groove on the side near the pump cover, which is connected to the oil delivery channels. The upper pump housing is connected to the lower pump housing and covers the opening of the connecting groove. The upper pump housing has a second connecting hole, and the connecting shaft is embedded in the second connecting hole. The upper pump housing has a first fixing hole on the side near the lower pump housing, and the lower pump housing has a first connecting hole. The first connecting hole is used for bolts to pass through and be threaded into the first fixing hole.

[0011] By adopting the above technical solution, the connecting groove is set on one side of the lower pump housing, which facilitates processing and reduces production costs. The upper pump housing is connected to the lower pump housing and covers the opening of the connecting groove, making the connecting groove a closed chamber. This allows the oil in one oil delivery channel to enter another oil delivery channel through the connecting groove, ensuring stable oil delivery and improving the reliability of the engine and gearbox pump housing.

[0012] Preferably, the upper pump housing has an upper weight-reducing groove on the side away from the lower pump housing. The upper weight-reducing groove is arranged around the second connecting hole. The bottom of the upper weight-reducing groove has a plurality of second connecting holes, which are distributed at intervals along the circumference of the upper pump housing. The lower pump housing has a third connecting hole. The number of the third connecting holes is the same as the number of the second connecting holes and they correspond one-to-one. The second connecting holes and the third connecting holes are used for bolts to pass through and be threaded to the gearbox housing.

[0013] By adopting the above technical solution, a weight reduction groove is set on the upper pump housing, which reduces the overall weight of the oil pump and transmission while ensuring the structural strength of the upper pump housing, thereby reducing vehicle fuel consumption.

[0014] Preferably, the bottom of the upper weight-reducing groove is connected with several reinforcing ribs.

[0015] By adopting the above technical solution, the reinforcement ribs effectively enhance the structural strength of the upper pump housing, prevent the possibility of deformation of the upper pump housing due to excessive oil pressure in the connecting groove, improve the service life of the upper pump housing, and improve the reliability of the engine and transmission pump housing.

[0016] Preferably, it also includes a sealing element. The lower pump housing has a sealing groove on the side near the upper pump housing. The sealing groove surrounds the connecting groove. The number of sealing elements is the same as the number of sealing grooves and corresponds one-to-one. The sealing element is connected to the upper pump housing. The sealing element is used to be embedded in the sealing groove. The side wall of the sealing element fits against the groove wall of the sealing groove.

[0017] By adopting the above technical solution, the cooperation between the seal and the sealing groove helps to reduce the possibility of oil leakage from the connection groove between the upper and lower pump housings, improve the sealing performance between the upper and lower pump housings, and enhance the reliability of the engine and transmission pump housing.

[0018] Preferably, the system further includes a slider, a first reset element, an airbag, a one-way valve, a contact switch, and a solenoid valve. The upper pump housing has a groove on the side near the lower pump housing, and the slider is slidably embedded in the groove. The sliding direction of the slider is parallel to the axis of the connecting shaft. The sealing element is connected to the end of the slider near the lower pump housing. The first reset element is connected between the slider and the upper pump housing, and the first reset element causes the slider to tend to extend out of the groove. The slider has an air intake channel, and the one-way valve is embedded in the air intake channel, enabling one-way flow from the outside to the groove. The second connecting hole has a groove in its wall, and the airbag is embedded in the groove. The bottom of the slide groove has a first connecting channel, which is connected to the airbag. The airbag is used to block the second connecting hole. The upper pump housing has an air outlet channel, which connects the slide groove to the outside. The solenoid valve is embedded in the air outlet channel. The contact switch is embedded in the slide groove and is electrically connected to the solenoid valve. The contact switch is used to allow the slider to abut against the bottom of the slide groove. When all of the contact switches are closed, the solenoid valve is in the connected state.

[0019] By adopting the above technical solution, the upper pump housing and the lower pump housing are connected. The lower pump housing abuts against the sealing element, pushing the slider to overcome the elastic force of the first reset element and embed into the slide groove. When the slider does not abut against the contact switch, the solenoid valve is in the closed state, allowing the gas in the slide groove to enter the airbag. The airbag expands to seal the second connection hole, preventing the bolt from passing through the second connection hole. This avoids the bolt being passed through the second connection hole when the airbag is not expanded during installation, reducing the time spent on disassembling the bolt and prompting the operator to ensure a tight connection between the upper and lower pump housings. When the adjacent ends of the upper and lower pump housings are tightly fitted, the slider abuts against the contact switch, the contact switch closes, the solenoid valve opens, and the airbag squeezes the gas out of the outlet channel, realizing the connection between the second connection hole and the third connection hole. This facilitates the bolt's fixed connection between the upper pump housing, the lower pump housing, and the gearbox housing, improving the reliability of the engine and gearbox pump housing.

[0020] Preferably, the upper pump housing is provided with a connecting cavity, the connecting cavity is arc-shaped, and the connecting cavity is connected to the first connecting channel.

[0021] By adopting the above technical solution, the upper pump housing is provided with a connecting cavity, so that the gas in each slide groove is pushed into the connecting cavity by each slider, and then transported to each airbag through each first connecting channel, thereby simultaneously sealing each second connecting hole. This avoids the bolts being passed through the second connecting holes of the airbags before they are inflated during installation, reduces the time spent on disassembling the bolts, and improves the reliability of the engine and gearbox pump housing.

[0022] Preferably, it further includes a sealing plate and a second reset member. The sealing plate is slidably embedded in the groove. The sliding direction of the sealing plate is perpendicular to the axial direction of the second connecting hole. One end of the sealing plate is connected to the airbag. The second reset member is connected between the sealing plate and the upper pump housing. The second reset member makes the sealing plate tend to be embedded in the groove.

[0023] By adopting the above technical solution, the airbag inflates and pushes the sealing plate to slide, thereby sealing the second connecting hole. This reduces the possibility of bolts scraping the airbag and causing damage, and improves the service life of the airbag. When the solenoid valve opens, the second reset component drives the sealing plate to embed into the groove, squeezing the air in the airbag out of the upper pump housing through the first connecting channel, connecting cavity and air outlet channel. This connects the second connecting hole and the third connecting hole, facilitating the bolts to fix the upper pump housing, lower pump housing and gearbox housing, and improving the reliability of the engine and gearbox pump housing.

[0024] Preferably, the upper pump housing has a receiving groove on the side near the lower pump housing, and a limiting strip is connected to the side of the lower pump housing near the upper pump housing. The limiting strip is arranged around the connecting shaft, the limiting strip is embedded in the receiving groove, and the outer wall of the limiting strip is in contact with the groove wall.

[0025] By adopting the above technical solution, the outer wall of the limiting strip fits into the wall of the receiving groove, reducing the possibility of relative movement between the upper and lower pump housings in the horizontal direction. This facilitates the alignment of the first connecting hole with the first fixing hole to achieve a fixed connection between the upper and lower pump housings, thereby improving the ease of assembly of the engine and gearbox pump housings.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. The connecting shaft rotates, which drives the impeller in the receiving cavity to rotate through the transmission components. This draws oil from the oil inlet and sends it out from the oil outlet. This structure makes the overall structure of the oil pump more compact, reduces the number of parts, and improves the space utilization of the oil pump and gearbox.

[0028] 2. The cross-sectional area of ​​the oil inlet is larger than that of the oil outlet. At the same time, the oil pressure flowing out of the oil outlet is greater than that entering the oil inlet. The increased oil pressure at the oil outlet helps the oil to quickly reach the required area, thus improving the working performance and reliability of the oil pump.

[0029] 3. The upper and lower pump housings are connected. The lower pump housing abuts against the seal, pushing the slider to overcome the elastic force of the first reset element and embed into the groove. When the slider does not abut against the contact switch, the solenoid valve is closed, allowing gas in the groove to enter the air bladder. The air bladder expands to seal the second connection hole, preventing bolts from passing through it. This avoids bolts being passed through the unexpanded second connection hole during installation, reducing the time spent removing bolts and prompting the operator to ensure a tight connection between the upper and lower pump housings. When the adjacent ends of the upper and lower pump housings are tightly fitted, the slider abuts against the contact switch, closing the switch and opening the solenoid valve. The air bladder then expels gas from the outlet channel, connecting the second and third connection holes. This facilitates the bolt's fixed connection between the upper and lower pump housings and the gearbox housing, improving the reliability of the engine and gearbox pump housings. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the pump housing of the engine transmission oil pump.

[0031] Figure 2 This is a schematic diagram of the exploded structure of the engine transmission oil pump housing.

[0032] Figure 3 This is a cross-sectional view of the pump housing of the engine transmission oil pump.

[0033] Figure 4 This is a partial cross-sectional view of the pump housing of the engine transmission oil pump.

[0034] Figure 5 This is a cross-sectional view of the upper pump casing and the protection mechanism.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Lower pump housing; 11. First connecting hole; 12. Receiving cavity; 13. Oil inlet; 14. Oil outlet; 15. Mounting cavity; 16. Annular groove; 17. Oil delivery channel; 18. Connecting groove; 19. First connecting hole; 110. Third connecting hole; 111. Sealing groove; 112. Limiting strip; 113. Lower weight reduction groove; 114. Positioning groove; 115. Fourth connecting hole; 116. Connecting groove;

[0037] 2. Pump cover; 21. Positioning block; 211. Second fixing hole; 212. Fifth connecting hole;

[0038] 3. Impeller;

[0039] 4. Transmission components; 41. Sprockets; 42. Chains; 43. Drive shafts;

[0040] 5. Connecting shaft;

[0041] 6. Upper pump housing; 61. Second connecting hole; 62. First fixing hole; 63. Upper weight reduction groove; 64. Second connecting hole; 65. Reinforcing rib; 651. First reinforcing rib; 652. Second reinforcing rib; 653. Third reinforcing rib; 66. Slide groove; 67. Groove; 68. First connecting channel; 69. Air outlet channel; 610. Connecting cavity; 611. Receiving groove; 612. Connecting post; 613. Fixing post; 614. Embedded groove; 615. Second connecting channel; 616. Mounting groove; 617. Fixing groove; 618. Guide groove;

[0042] 7. Protection mechanism; 71. Sealing assembly; 711. Seal; 712. Slider; 7121. Air intake passage; 713. First reset component; 714. Check valve; 715. Contact switch; 72. Blocking assembly; 721. Airbag; 722. Sealing plate; 7221. Guide block; 723. Second reset component; 73. Solenoid valve. Detailed Implementation

[0043] The present application will be further described in detail below with reference to the accompanying drawings.

[0044] Reference Figure 1 This application discloses a pump housing for an engine transmission oil pump, comprising a lower pump housing 1 and a connecting shaft 5. The lower pump housing 1 is coaxially provided with a first communicating hole 11, and the connecting shaft 5 is coaxially rotatably embedded in the first communicating hole 11, with the sidewall of the connecting shaft 5 abutting against the wall of the first communicating hole 11. A mounting cavity 15 is coaxially provided at one end of the lower pump housing 1 along the axis of the connecting shaft 5. The mounting cavity 15 is annular and surrounds the first communicating hole 11, serving as a mounting cavity for a piston to be inserted. In this embodiment, two mounting cavities 15 are provided.

[0045] Reference Figure 1 and Figure 2An engine transmission oil pump housing further includes a pump cover 2, an impeller 3, and a transmission component 4. The other end of the lower pump housing 1 is provided with a receiving cavity 12. An oil inlet 13 and an oil outlet 14 are provided on the cavity wall of the receiving cavity 12 away from the connecting shaft 5. The oil inlet 13 and the oil outlet 14 are connected to the outside and are spaced apart along the axis of the connecting shaft 5. The oil outlet 14 is located on the side of the receiving cavity 12 near the bottom of the cavity. In this embodiment, the cross-sectional area of ​​the oil inlet 13 is larger than the cross-sectional area of ​​the oil outlet 14. The lower pump housing 1 has several lower weight-reducing grooves 113 on the side away from the oil outlet 14. The pump cover 2 is connected to the lower pump housing 1 and covers the opening of the receiving cavity 12. The surface of the pump cover 2 away from the bottom of the receiving cavity 12 is flush with one end of the lower pump housing 1 along the axis of the connecting shaft 5. A positioning groove 114 is provided on the wall of the lower weight-reducing groove 113. A positioning block 21 is fixedly connected to the side wall of the pump cover 2, and the positioning block 21 is embedded in the positioning groove 114, with the side wall of the positioning block 21 fitting against the wall of the positioning groove 114. In this embodiment, there are two positioning blocks 21. One positioning block 21 is located on the side of the pump cover 2 near the connecting shaft 5, and the other positioning block 21 has a second fixing hole 211. A fourth connecting hole 115 is provided at the end of the lower pump housing 1 away from the pump cover 2. The fourth connecting hole 115 is used for bolts to pass through and be threadedly connected to the second fixing hole 211. The impeller 3 is rotatably embedded in the receiving cavity 12, and the rotation axis of the impeller 3 is parallel to the rotation axis of the connecting shaft 5. The transmission component 4 is connected between the impeller 3 and the connecting shaft 5. The transmission component 4 includes a sprocket 41, a chain 42, and a transmission shaft 43. The transmission shaft 43 is coaxially connected to the impeller 3. One end of the transmission shaft 43 away from the bottom of the receiving cavity 12 passes through the pump cover 2. There are two sprockets 41, which are distributed and coaxially connected to the outer periphery of the connecting shaft 5 and the transmission shaft 43. The chain 42 is sleeved on the outer periphery of the two sprockets 41. A limiting strip 112 is coaxially fixedly connected to one end of the lower pump casing 1 near the pump cover 2. The limiting strip 112 is annular and surrounds the connecting shaft 5. The limiting strip 112 has two communicating grooves 116 for the chain 42 to pass through.

[0046] The lower pump housing 1 has an annular groove 16 on its outer periphery at the end away from the pump cover 2. The bottom of the annular groove 16 has several oil delivery channels 17, which communicate with the mounting cavity 15 and the first connecting hole 11. In this embodiment, the bottom of the annular groove 16 has eight oil delivery channels 17, the bottom of each of the two mounting cavities 15 has one oil delivery channel 17, and the wall of the first connecting hole 11 has five oil delivery channels 17. The lower pump housing 1 has several connecting grooves 18 at the end near the pump cover 2, which communicate with the oil delivery channels 17. In this embodiment, there are three connecting grooves 18, with each connecting groove 18 connecting two oil delivery channels 17.

[0047] An engine transmission oil pump housing further includes an upper pump housing 6, which is connected to the end of the lower pump housing 1 near the pump cover 2 and covers the opening of the connecting groove 18. The end of the upper pump housing 6 near the lower pump housing 1 is in contact with the end of the lower pump housing 1 near the pump cover 2. The upper pump housing 6 is coaxially provided with a second connecting hole 61, and a connecting shaft 5 is embedded in the second connecting hole 61. The end of the upper pump housing 6 away from the lower pump housing 1 is provided with an upper weight-reducing groove 63, which surrounds the second connecting hole 61. A plurality of connecting posts 612 are fixedly connected to the bottom of the upper weight-reducing groove 63, and the plurality of connecting posts 612 are distributed circumferentially around the upper pump housing 6. In this embodiment, there are thirteen connecting posts 612, and the end of the connecting post 612 away from the bottom of the upper weight-reducing groove 63 is coaxially provided with a second connecting hole 64, which penetrates the upper pump housing 6. The lower pump housing 1 is provided with a third connecting hole 110. The number of third connecting holes 110 is the same as the number of second connecting holes 64 and they correspond one-to-one. The second connecting holes 64 and the third connecting holes 110 are used for bolts to pass through and be threaded to the gearbox housing.

[0048] The bottom of the upper weight-reducing groove 63 is fixedly connected with reinforcing ribs 65, which include a first reinforcing rib 651, a second reinforcing rib 652, and a third reinforcing rib 653. The two ends of the first reinforcing rib 651 are fixedly connected to the inner and outer walls of the upper weight-reducing groove 63, respectively. One first reinforcing rib 651 is provided between two adjacent connecting columns 612. The two ends of the second reinforcing rib 652 are fixedly connected to the side wall of the connecting column 612 and the inner wall of the upper weight-reducing groove 63, respectively. The number of second reinforcing ribs 652 is the same as the number of connecting columns 612 and they correspond one-to-one. The two ends of the third reinforcing rib 653 are fixedly connected between two connecting columns 612, and there are six third reinforcing ribs 653.

[0049] Reference Figure 3The upper pump housing 6 has a receiving groove 611 at one end near the lower pump housing 1, which is connected to the second communicating hole 61. A limiting strip 112 is embedded in the receiving groove 611, and the outer wall of the limiting strip 112 is in contact with the groove wall of the receiving groove 611. A fixing post 613 is fixedly connected to the bottom of the upper weight reduction groove 63. There are five fixing posts 613, which are circumferentially spaced around the axis of the upper pump housing 6. The upper pump housing 6 has a first fixing hole 62 at one end near the lower pump housing 1. The number of first fixing holes 62 is the same as the number of fixing posts 613 and they correspond one-to-one. The distance from the axis of the five first fixing holes 62 to the axis of the upper pump housing 6 is equal. Four of the first fixing holes 62 are located outside the receiving groove 611, and one of the first fixing holes 62 is connected to the receiving groove 611. The bottom of the mounting cavity 15 near the first connecting hole 11 is provided with a first connecting hole 19. The number of first connecting holes 19 is the same as the number of first fixing holes 62 and they correspond one-to-one. The positioning block 21 near the connecting shaft 5 is provided with a fifth connecting hole 212. The axis of the fifth connecting hole 212 coincides with the axis of the first fixing hole 62 located in the receiving groove 611. The first connecting hole 19 and the fifth connecting hole 212 are used for bolts to pass through and be threadedly connected to the first fixing hole 62.

[0050] Reference Figure 2 and Figure 4 The pump housing of an engine transmission oil pump also includes a protection mechanism 7. The protection mechanism 7 includes a sealing assembly 71. A sealing groove 111 is provided at one end of the lower pump housing 1 near the upper pump housing 6. The sealing groove 111 surrounds the connecting groove 18. The number of sealing grooves 111 and sealing assemblies 71 is the same as the number of connecting grooves 18 and they correspond one-to-one. The sealing assembly 71 includes a seal 711, a slider 712, and a one-way valve 714.

[0051] The upper pump housing 6 has a sliding groove 66 at one end near the lower pump housing 1. The number of sliding grooves 66 is the same as the number of sealing grooves 111 and they correspond one-to-one. The slider 712 is slidably embedded in the sliding groove 66. The sliding direction of the slider 712 is parallel to the axis of the connecting shaft 5. The side wall of the slider 712 is in contact with the groove wall of the sliding groove 66. The sealing element 711 is fixedly connected to the end of the slider 712 near the lower pump housing 1. The sealing element 711 is used to embed in the sealing groove 111. The side wall of the sealing element 711 is in contact with the groove wall of the sealing groove 111. The slider 712 has an air intake channel 7121 that runs through the slider 712 along the sliding direction of the slider 712. A one-way valve 714 is embedded in the air intake channel 7121. The one-way valve 714 enables one-way flow from the outside to the sliding groove 66.

[0052] Reference Figure 5The sealing assembly 71 also includes a first reset member 713, which is connected between the slider 712 and the upper pump housing 6. The first reset member 713 causes the end of the slider 712 near the lower pump housing 1 to tend to extend out of the groove 66. In this embodiment, the first reset member 713 is a spring. The bottom of the groove 66 is provided with a groove 614. There are two grooves 614, which are distributed at intervals along the length of the groove 66. The number of first reset members 713 is the same as the number of grooves 614 and they correspond one-to-one. One end of the first reset member 713 is connected to the bottom of the groove 614, and the other end of the first reset member 713 is connected to the end of the slider 712 near the bottom of the groove 66.

[0053] Reference Figure 4 The upper pump housing 6 has a connecting cavity 610, which is arc-shaped and located on the side of the slide groove 66 away from the lower pump housing 1. The bottom of the slide groove 66 has several second connecting channels 615, which are spaced apart along the length of the slide groove 66 and communicate with the connecting cavity 610. An air outlet channel 69 is provided on the side wall of the connecting cavity 610 away from the slide groove 66, and the air outlet channel 69 communicates with the outside. The protection mechanism 7 also includes a solenoid valve 73, which is embedded in the air outlet channel 69 to open and close the air outlet channel 69. The bottom of the slide groove 66 has a mounting groove 616. The sealing assembly 71 also includes a contact switch 715. The number of mounting grooves 616 and contact switches 715 is the same as the number of slide grooves 66 and corresponds one-to-one. The contact switches 715 are fixedly connected to the bottom of the mounting groove 616 and are electrically connected to the solenoid valve 73. The contact switches 715 are used to allow one end of the slider 712 to abut against the bottom of the slide groove 66. In this embodiment, when all three contact switches 715 are closed, the solenoid valve 73 is in the connected state.

[0054] The second connecting hole 64 has a groove 67 on the side wall near the connecting cavity 610. The protection mechanism 7 also includes a sealing assembly 72. The number of sealing assemblies 72 is the same as the number of grooves 67 and they correspond one-to-one. The sealing assembly 72 includes an airbag 721, a sealing plate 722, and a second reset member 723. The outer cavity wall of the connecting cavity 610 has a first connecting channel 68. The number of first connecting channels 68 is the same as the number of airbags 721 and they correspond one-to-one. The first connecting channel 68 communicates with the airbag 721. The sealing plate 722 is slidably embedded in the groove 67. The sliding direction of the sealing plate 722 is perpendicular to the axial direction of the second connecting hole 64. One end of the sealing plate 722 is fixedly connected to the end of the airbag 721 away from the bottom of the groove 67. The side wall of the second connecting hole 64 away from the groove 67 has a fixing groove 617. The fixing groove 617 is used for the sealing plate 722 to be embedded to achieve the closure of the second connecting hole 64. A guide groove 618 is provided on the side wall of the groove 67 away from the lower pump housing 1. A guide block 7221 is fixedly connected to the side of the sealing plate 722 away from the lower pump housing 1. The guide block 7221 is slidably embedded in the guide groove 618. A second reset member 723 is connected between the guide block 7221 and the upper pump housing 6. The second reset member 723 makes the sealing plate 722 tend to be embedded in the groove 67. In this embodiment, the second reset member 723 is a spring. One end of the second reset member 723 is connected to the side surface of the guide block 7221 near the second connecting hole 64, and the other end of the second reset member 723 is connected to the side wall of the guide groove 618 near the second connecting hole 64.

[0055] The implementation principle of the pump housing of an engine transmission oil pump according to an embodiment of this application is as follows: the impeller 3 and the drive shaft 43 are embedded in the receiving cavity 12, the pump cover 2 is connected to the lower pump housing 1 to cover the receiving cavity 12, one end of the drive shaft 43 passes through the pump cover 2, and the bolt passes through the fourth connecting hole 115 and is threadedly connected to the second fixing hole 211 to realize the fixed connection between the pump cover 2 and the lower pump housing 1. The connecting shaft 5 drives the first connecting hole 11, and two sprockets 41 are respectively connected to the outer periphery of the connecting shaft 5 and the drive shaft 43. The chain 42 is sleeved on the outer periphery of the two sprockets 41.

[0056] The upper pump housing 6 is brought close to the lower pump housing 1, the limiting strip 112 is embedded in the receiving groove 611, the sealing member 711 is embedded in the sealing groove 111, the sealing member 711 abuts against the bottom of the sealing groove 111, the driving slider 712 overcomes the elastic force of the first reset member 713 and slides into the slide groove 66, the air in the slide groove 66 is pushed into the connecting cavity 610 through the second connecting channel 615, and then squeezed into the airbag 721 through the second connecting channel 615. The airbag 721 expands, pushing the sealing plate 722 to overcome the elastic force of the second reset member 723 and slide into the second connecting hole 64, and is embedded in the fixing groove 617. After passing through the first connecting hole 19, the bolt is threaded into the first fixing hole 62, thus fixing the upper pump housing 6 and the lower pump housing 1. When the adjacent two side surfaces of the upper pump housing 6 and the lower pump housing 1 are tightly fitted, the slider 712 abuts against the bottom of the groove 66, and the slider 712 abuts against the contact switch 715. The contact switch 715 closes, the solenoid valve 73 opens, and the sealing plate 722 is embedded in the groove 67 under the elastic force of the second reset member 723, squeezing the air in the airbag 721 out of the upper pump housing 6 through the first connecting channel 68, the connecting cavity 610, and the air outlet channel 69. After passing through the second connecting hole 64 and the third connecting hole 110, the bolt is threaded into the gearbox housing, thus fixing the upper pump housing 6, the lower pump housing 1, and the gearbox housing.

[0057] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. The pump housing of an engine transmission oil pump, characterized in that: The system includes a lower pump housing (1), a pump cover (2), an impeller (3), a transmission component (4), and a connecting shaft (5); the lower pump housing (1) is provided with a first communicating hole (11); the connecting shaft (5) is coaxially rotatably embedded in the first communicating hole (11); the lower pump housing (1) is provided with a receiving cavity (12) on one side along the axis of the connecting shaft (5); the pump cover (2) is connected to the lower pump housing (1) and covers the opening of the receiving cavity (12); the receiving cavity (12) is provided with an oil inlet (13) and an oil outlet (14) on its cavity wall; the oil inlet (13) and the oil outlet (14) are connected to the outside; the impeller (3) is rotatably embedded in the receiving cavity (12); the transmission component (4) is connected between the connecting shaft (5) and the impeller (3); It also includes an upper pump housing (6); the lower pump housing (1) has several mounting cavities (15) on the side away from the pump cover (2); the mounting cavities (15) are used for piston insertion; the lower pump housing (1) has an annular groove (16) on the outer periphery of the end away from the pump cover (2); the bottom of the annular groove (16) has several oil delivery channels (17); the oil delivery channels (17) are connected to the mounting cavities (15); the lower pump housing (1) has a connecting groove (18) on the side near the pump cover (2); the connecting groove (18) is connected to the oil delivery channels (17); the upper pump housing (6) is connected to the lower pump housing (1) and covers the opening of the connecting groove (18); The upper pump housing (6) is provided with an upper weight-reducing groove (63) on the side away from the lower pump housing (1); the upper weight-reducing groove (63) is arranged around the second connecting hole (61); the bottom of the upper weight-reducing groove (63) is provided with a plurality of second connecting holes (64); the plurality of second connecting holes (64) are distributed at intervals along the circumference of the upper pump housing (6); the lower pump housing (1) is provided with a third connecting hole (110); the number of the third connecting holes (110) is the same as the number of the second connecting holes (64) and they correspond one-to-one; the second connecting holes (64) and the third connecting holes (110) are used for bolts to pass through and be threaded to the gearbox housing; It also includes a sealing element (711); the lower pump housing (1) is provided with a sealing groove (111) on the side near the upper pump housing (6); the sealing groove (111) is arranged around the connecting groove (18); the number of sealing elements (711) is the same as the number of sealing grooves (111) and corresponds one-to-one; the sealing element (711) is connected to the upper pump housing (6); the sealing element (711) is used to be embedded in the sealing groove (111); the side wall of the sealing element (711) is in contact with the groove wall of the sealing groove (111); It also includes a slider (712), a first reset member (713), an airbag (721), a one-way valve (714), a contact switch (715), and a solenoid valve (73); the upper pump housing (6) is provided with a groove (66) on the side near the lower pump housing (1); the slider (712) is slidably embedded in the groove (66); the sliding direction of the slider (712) is parallel to the axial direction of the connecting shaft (5); the seal (711) is connected to the end of the slider (712) near the lower pump housing (1); the first reset member (713) is connected between the slider (712) and the upper pump housing (6); the first reset member (713) makes the slider (712) tend to extend out of the groove (66); the slider (712) is provided with an air intake channel (7121); the one-way valve (714) is embedded in the air intake channel (7121); the one-way valve (714) realizes the flow from the outside to the groove (7121). 66) One-way conduction; the second connecting hole (64) has a groove (67) on its wall; the airbag (721) is embedded in the groove (67); the bottom of the slide (66) has a first connecting channel (68); the first connecting channel (68) is connected to the airbag (721); the airbag (721) is used to block the second connecting hole (64); the upper pump housing (6) has an air outlet channel (69); the air outlet channel (69) connects the slide (66) and the outside; the solenoid valve (73) is embedded in the air outlet channel (69); the contact switch (715) is embedded in the slide (66); the contact switch (715) is electrically connected to the solenoid valve (73); the contact switch (715) is used to allow the slider (712) to abut against the bottom of the slide (66); when all of the contact switches (715) are closed; the solenoid valve (73) is in the connected state.

2. The pump housing of the engine transmission oil pump according to claim 1, characterized in that: The cross-sectional area of ​​the oil inlet (13) is larger than that of the oil outlet (14).

3. The pump housing of the engine transmission oil pump according to claim 1, characterized in that: The upper pump housing (6) is provided with a second connecting hole (61); the connecting shaft (5) is embedded in the second connecting hole (61); the upper pump housing (6) is provided with a first fixing hole (62) on the side near the lower pump housing (1); the lower pump housing (1) is provided with a first connecting hole (19); the first connecting hole (19) is used for the bolt to pass through and be threaded to the first fixing hole (62).

4. The pump housing of the engine transmission oil pump according to claim 3, characterized in that: The bottom of the upper weight-reducing groove (63) is connected to several reinforcing ribs (65).

5. The pump housing of the engine transmission oil pump according to claim 3, characterized in that: The upper pump housing (6) is provided with a connecting cavity (610); the connecting cavity (610) is arc-shaped; the connecting cavity (610) is connected to the first connecting channel (68).

6. The pump housing of the engine transmission oil pump according to claim 3, characterized in that: It also includes a sealing plate (722) and a second reset member (723); the sealing plate (722) is slidably embedded in the groove (67); the sliding direction of the sealing plate (722) is perpendicular to the axial direction of the second connecting hole (64); one end of the sealing plate (722) is connected to the airbag (721); the second reset member (723) is connected between the sealing plate (722) and the upper pump housing (6); the second reset member (723) makes the sealing plate (722) tend to be embedded in the groove (67).

7. The pump housing of the engine transmission oil pump according to claim 3, characterized in that: The upper pump housing (6) has a receiving groove (611) on the side near the lower pump housing (1); the lower pump housing (1) is connected to a limiting strip (112) on the side near the upper pump housing (6); the limiting strip (112) is arranged around the connecting shaft (5); the limiting strip (112) is embedded in the receiving groove (611); the outer wall of the limiting strip (112) is in contact with the groove wall of the receiving groove (611).

Images