Engine gearbox pump shell

Abstract

The invention relates to the technical field of automobile accessories, in particular to an engine gearbox pump shell 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 communicating hole, the connecting shaft is coaxially and rotatably embedded in the first communicating hole, and a containing cavity is formed in the side, in the axis direction of the connecting shaft, of the lower pump shell; the pump cover is connected to the lower pump shell and covers a cavity opening of the containing cavity, an oil inlet and an oil outlet are formed in the cavity wall of the containing cavity and communicate with the outside, the impeller is rotationally embedded in the containing cavity, and the transmission part is connected between the connecting shaft and the impeller. The connecting shaft rotates, the impeller in the containing cavity is driven by the transmission part to rotate, oil liquid is sucked in from the oil inlet and then sent out from the oil outlet, the whole structure of the oil pump is compact through the structure, the number of parts is reduced, and the space utilization rate of the oil pump and a gearbox is increased.

Description

Technical Field

[0001] This application relates to the technical field of automotive parts, and particularly to an engine transmission pump housing. Background Art

[0002] The transmission of an automobile is a key component, and the transmission oil pump is the heart of the transmission. During the operation of the transmission, the oil pump needs to pump oil to cool, lubricate, transmit, and clean the transmission. The working performance of the oil pump directly affects the operation of the transmission.

[0003] Currently, in order to achieve the lubrication and cooling functions of the transmission, the industry generally adopts an oil pump solution with independent installation. Specifically, common methods include fixing the oil pump to the outside of the transmission housing through a bracket, or directly connecting it to the transmission housing through a flange, resulting in a large number of parts in the whole machine and an uncompact axial space. Summary of the Invention

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

[0005] An engine transmission pump housing provided by this application adopts the following technical solutions: An engine transmission pump housing includes a lower pump housing, a pump cover, an impeller, a transmission component, and a connecting shaft. The lower pump housing is provided with a first communication hole, and the connecting shaft is coaxially and rotatably embedded in the first communication hole. One side of the lower pump housing along the axis direction of the connecting shaft is provided with a receiving cavity. The pump cover is connected to the lower pump housing and covers the opening of the receiving cavity. The wall of the receiving cavity is provided with an oil inlet and an oil outlet, and the oil inlet and the oil outlet are communicated with the outside. The impeller is rotatably embedded in the receiving cavity, and the transmission component is connected between the connecting shaft and the impeller.

[0006] By adopting the above technical solutions, when the connecting shaft rotates, the impeller in the receiving cavity is driven to rotate through the transmission component, sucking the oil liquid from the oil inlet and then sending it out from the oil discharge port. This structure makes the overall structure of the oil pump relatively compact, reduces the number of parts, and improves the space utilization rate of the oil pump and the transmission.

[0007] Preferably, the cross-sectional area of the oil inlet is larger than that of the oil outlet.

[0008] By adopting the above technical solutions, since the cross-sectional area of the oil inlet is larger than that of the oil outlet, the pressure of the oil liquid flowing out from the oil outlet is greater than that of the oil liquid entering from the oil inlet at the same time. The increase in the oil pressure at the oil outlet helps the oil liquid to quickly reach the required area, improving the working performance and reliability of the oil pump.

[0009] Preferably, it further includes an upper pump housing. On the side of the lower pump housing away from the pump cover, there are several installation cavities for the pistons to be embedded. On the outer periphery of the end of the lower pump housing away from the pump cover, there is an annular groove. At the bottom of the annular groove, there are several oil delivery channels connected to the installation cavities. On the side of the lower pump housing close to the pump cover, there is a connection groove connected to the oil delivery channels. The upper pump housing is connected to the lower pump housing and covers the opening of the connection groove. The upper pump housing is provided with a second communication hole, and the connecting shaft is embedded in the second communication hole. On the side of the upper pump housing close to the lower pump housing, there is a first fixing hole, and the lower pump housing is provided with a first connection hole for a bolt to pass through and be threadedly connected to the first fixing hole.

[0010] By adopting the above technical solution, the connection groove is arranged on one side of the lower pump housing, which is convenient for processing and reduces the production cost. The upper pump housing is connected to the lower pump housing and covers the opening of the connection groove, making the connection groove a closed chamber, enabling the oil in one oil delivery channel to enter another oil delivery channel through the connection groove, ensuring the stable delivery of oil and improving the reliability of the engine gearbox pump housing.

[0011] Preferably, on the side of the upper pump housing away from the lower pump housing, there is an upper weight-reducing groove surrounding the second communication hole. At the bottom of the upper weight-reducing groove, there are several second connection holes, and the several second connection holes are circumferentially spaced apart along the upper pump housing. The lower pump housing is provided with third connection holes, and the number of the third connection holes is the same as and corresponds to the number of the second connection holes one by one. The second connection holes and the third connection holes are for bolts to pass through and be threadedly connected to the gearbox housing.

[0012] By adopting the above technical solution, the upper weight-reducing groove is provided on the upper pump housing, reducing the overall weight of the oil pump and the gearbox on the basis of ensuring the structural strength of the upper pump housing and reducing the fuel consumption of the vehicle.

[0013] Preferably, several reinforcing ribs are connected to the bottom of the upper weight-reducing groove.

[0014] By adopting the above technical solution, the arrangement of the reinforcing ribs effectively enhances the structural strength of the upper pump housing, prevents the possibility of deformation of the upper pump housing due to excessive oil pressure in the connection groove, improves the service life of the upper pump housing, and improves the reliability of the engine gearbox pump housing.

[0015] Preferably, it further includes a seal. On the side of the lower pump housing close to the upper pump housing, there is a seal groove surrounding the connection groove. The number of the seals is the same as and corresponds to the number of the seal grooves one by one. The seals are connected to the upper pump housing and are used to be embedded in the seal grooves, and the side walls of the seals are in contact with the groove walls of the seal grooves.

[0016] By adopting the above technical solution, the cooperation between the seal and the seal groove helps to reduce the possibility of oil leakage from the connection groove between the upper pump housing and the lower pump housing, improve the sealing performance between the upper pump housing and the lower pump housing, and enhance the reliability of the engine transmission pump housing.

[0017] Preferably, it further includes a slider, a first reset member, an airbag, a one-way valve, a contact switch and a solenoid valve. A chute is provided on one side of the upper pump housing close to the lower pump housing. The slider is slidably embedded in the chute. The sliding direction of the slider is parallel to the axis direction of the connecting shaft. The seal is connected to one end of the slider close to the lower pump housing. The first reset member is connected between the slider and the upper pump housing. The first reset member makes the slider tend to extend out of the chute. An air inlet passage is provided on the slider. The one-way valve is embedded in the air inlet passage. The one-way valve realizes one-way conduction from the outside to the chute. A groove is provided on the wall of the second connection hole. The airbag is embedded in the groove. A first connection passage is provided at the bottom of the chute. The first connection passage is communicated with the airbag. The airbag is used to block the second connection hole. An air outlet passage is provided on the upper pump housing. The air outlet passage communicates the chute with the outside. The solenoid valve is embedded in the air outlet passage. The contact switch is embedded in the chute. The contact switch is electrically connected to the solenoid valve. The contact switch is used for the end of the slider close to the bottom of the chute to abut. When several contact switches are all closed, the solenoid valve is in a connected state.

[0018] By adopting the above technical solution, the upper pump housing and the lower pump housing are connected. The lower pump housing abuts against the seal, pushing the slider to overcome the elastic force of the first reset member and embed into the chute. When the slider does not abut against the contact switch, the solenoid valve is in a closed state, and the gas in the chute enters the airbag. The airbag expands to seal the second connection hole, preventing the bolt from passing through the second connection hole. This avoids passing the bolt through the second connection hole where the airbag has not expanded during installation, reducing the time spent on removing the bolt, and prompting the staff that the upper pump housing and the lower pump housing are tightly connected inside. When the adjacent ends of the upper pump housing and the lower pump housing are tightly fitted, the slider abuts against the contact switch, the contact switch closes, and the solenoid valve opens. The airbag squeezes the gas out of the air outlet passage, realizing the communication between the second connection hole and the third connection hole, facilitating the fixed connection of the upper pump housing, the lower pump housing and the gearbox housing by bolts, and enhancing the reliability of the engine transmission pump housing.

[0019] Preferably, the upper pump housing is provided with a connection cavity. The connection cavity is arc-shaped and is communicated with the first connection passage.

[0020] By adopting the above technical solution, the upper pump housing is provided with a connection cavity, so that the gas in each chute is pushed into the connection cavity by each slider, and then is transported to each airbag through each first connection channel, synchronously closing each second connection hole, avoiding passing the bolt through the second connection hole where the airbag is not inflated during installation, reducing the time spent on removing the bolt, and improving the reliability of the engine transmission pump housing.

[0021] Preferably, it further includes a closing plate and a second reset member. The closing plate is slidably embedded in the groove. The sliding direction of the closing plate is perpendicular to the axis direction of the second connection hole. One end of the closing plate is connected to the airbag. The second reset member is connected between the closing plate and the upper pump housing, and the second reset member makes the closing plate tend to be embedded in the groove.

[0022] By adopting the above technical solution, the inflation of the airbag pushes the closing plate to slide, and the second connection hole is closed by the closing plate, reducing the possibility of the bolt scraping the airbag and causing damage to the airbag, and improving the service life of the airbag. When the solenoid valve is opened, the second reset member drives the closing plate to be embedded in the groove, and the air in the airbag is extruded out of the upper pump housing through the first connection channel, the connection cavity and the air outlet channel, realizing the communication between the second connection hole and the third connection hole, facilitating the bolt to fixedly connect the upper pump housing, the lower pump housing and the gearbox housing, and improving the reliability of the engine transmission pump housing.

[0023] Preferably, a receiving groove is provided on one side of the upper pump housing close to the lower pump housing. A limiting strip is connected to one side of the lower pump housing close to the upper pump housing. The limiting strip is arranged around the connecting shaft, and the limiting strip is embedded in the receiving groove, and the outer wall of the limiting strip fits with the groove wall of the receiving groove.

[0024] By adopting the above technical solution, the outer wall of the limiting strip fits with the groove wall of the receiving groove, reducing the possibility of relative displacement of the upper pump housing and the lower pump housing in the horizontal direction, facilitating the alignment of the first connection hole with the first fixing hole to realize the fixed connection of the upper pump housing and the lower pump housing, and improving the convenience of assembling the engine transmission pump housing.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The connecting shaft rotates, drives the impeller in the accommodating cavity to rotate through the transmission component, sucks the oil fluid from the oil inlet, and then sends it out from the oil outlet. This structure makes the overall structure of the oil pump relatively compact, reduces the number of components, and improves the space utilization rate of the oil pump and the gearbox; 2. The cross-sectional area of the oil inlet is larger than that of the oil outlet. The pressure of the oil fluid flowing out from the oil outlet is greater than that of the oil fluid entering from the oil inlet at the same time. The increase in the oil fluid pressure at the oil outlet helps the oil fluid to quickly reach the required area, improving the working performance and reliability of the oil pump; 3. The upper pump housing and the lower pump housing are connected. The lower pump housing abuts against the seal. The slider is pushed to overcome the elastic force of the first reset member and is inserted into the chute. When the slider does not abut against the contact switch, the solenoid valve is in a closed state, and the gas in the chute enters the airbag. The airbag expands to close the second connection hole, preventing the bolt from passing through the second connection hole where the airbag is not inflated, reducing the time spent on removing the bolt, and prompting the staff that the upper pump housing and the lower pump housing are tightly connected inside. When the adjacent ends of the upper pump housing and the lower pump housing 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 air outlet channel, enabling the second connection hole to communicate with the third connection hole, facilitating the fixed connection of the upper pump housing, the lower pump housing, and the gearbox housing, and improving the reliability of the engine gearbox pump housing. Brief Description of the Drawings

[0026] Figure 1 is a schematic structural diagram of the engine gearbox pump housing.

[0027] Figure 2 is an exploded structural diagram of the engine gearbox pump housing.

[0028] Figure 3 is a sectional view of the engine gearbox pump housing.

[0029] Figure 4 is a partial sectional view of the engine gearbox pump housing.

[0030] Figure 5 is a sectional view of the upper pump housing and the protection mechanism.

[0031] Description of the Reference Numerals: 1. Lower pump housing; 11. First communication hole; 12. Accommodation cavity; 13. Oil inlet; 14. Oil outlet; 15. Installation cavity; 16. Ring groove; 17. Oil transmission channel; 18. Connection groove; 19. First connection hole; 110. Third connection hole; 111. Sealing groove; 112. Limiting strip; 113. Lower weight reduction groove; 114. Positioning groove; 115. Fourth connection hole; 116. Communication groove; 2. Pump cover; 21. Positioning block; 211. Second fixing hole; 212. Fifth connection hole; 3. Impeller; 4. Transmission component; 41. Sprocket; 42. Chain; 43. Transmission shaft; 5. Connecting shaft; 6. Upper pump housing; 61. Second communication hole; 62. First fixing hole; 63. Upper weight reduction groove; 64. Second connection hole; 65. Reinforcing rib; 651. First reinforcing rib; 652. Second reinforcing rib; 653. Third reinforcing rib; 66. Slide groove; 67. Groove; 68. First connection channel; 69. Air outlet channel; 610. Connection cavity; 611. Accommodating groove; 612. Connection column; 613. Fixed column; 614. Embedded groove; 615. Second connection channel; 616. Installation groove; 617. Fixed groove; 618. Guide groove; 7. Protection mechanism; 71. Sealing assembly; 711. Sealing element; 712. Slide block; 7121. Air inlet channel; 713. First reset member; 714. Check valve; 715. Contact switch; 72. Plugging assembly; 721. Airbag; 722. Closing plate; 7221. Guide block; 723. Second reset member; 73. Solenoid valve. Specific embodiments

[0032] The present application will be further described in detail below with reference to the accompanying drawings.

[0033] Refer to Figure 1 As shown in [drawings not specified], an engine transmission pump housing according to an embodiment of the present application includes a lower pump housing 1 and a connecting shaft 5. The lower pump housing 1 is coaxially provided with a first communication hole 11, and the connecting shaft 5 is coaxially and rotatably embedded in the first communication hole 11, and the side wall of the connecting shaft 5 is in contact with the hole wall of the first communication hole 11. One end of the lower pump housing 1 along the axis of the connecting shaft 5 is coaxially provided with an installation cavity 15. The installation cavity 15 is annular and surrounds the first communication hole 11, and the installation cavity 15 is used for the piston to be embedded. In this embodiment, there are two installation cavities 15.

[0034] Refer to Figure 1 and Figure 2, an engine transmission 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 on the side away from the connecting shaft 5. The oil inlet 13 and the oil outlet 14 are communicated with the outside. The oil inlet 13 and the oil outlet 14 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 close to the bottom of the receiving cavity 12. In this embodiment, the cross-sectional area of the oil inlet 13 is larger than that of the oil outlet 14. A plurality of lower weight-reducing grooves 113 are provided on the side of the lower pump housing 1 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 on the side 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 groove wall of the lower weight-reducing groove 113. A positioning block 21 is fixedly connected to the side wall of the pump cover 2. The positioning block 21 is embedded in the positioning groove 114, and the side wall of the positioning block 21 fits against the groove 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 close to the connecting shaft 5. The other positioning block 21 is provided with a second fixing hole 211. The end of the lower pump housing 1 away from the pump cover 2 is provided with a fourth connecting hole 115 for a bolt 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, and the end of the transmission shaft 43 away from the bottom of the receiving cavity 12 penetrates through the pump cover 2. There are two sprockets 41, and the two sprockets 41 are coaxially connected to the outer peripheries of the connecting shaft 5 and the transmission shaft 43 respectively. The chain 42 is sleeved on the outer peripheries of the two sprockets 41. A limiting strip 112 is coaxially and fixedly connected to the end of the lower pump housing 1 close to the pump cover 2. The limiting strip 112 is annular and is arranged around the connecting shaft 5. The limiting strip 112 is provided with two communication grooves 116 for the chain 42 to pass through.

[0035] An annular groove 16 is provided on the outer periphery of the end of the lower pump housing 1 away from the pump cover 2. A plurality of oil delivery channels 17 are provided at the bottom of the annular groove 16. The oil delivery channels 17 are communicated with the installation cavity 15 and the first communication hole 11. In this embodiment, there are eight oil delivery channels 17 at the bottom of the annular groove 16, one oil delivery channel 17 is provided at the bottom of each of the two installation cavities 15, and five oil delivery channels 17 are provided on the hole wall of the first communication hole 11. A plurality of connecting grooves 18 are provided at the end of the lower pump housing 1 close to the pump cover 2. The connecting grooves 18 are communicated with the oil delivery channels 17. In this embodiment, there are three connecting grooves 18, and one connecting groove 18 communicates with two oil delivery channels 17.

[0036] An engine gearbox pump housing further includes an upper pump housing 6. The upper pump housing 6 is connected to one end of the lower pump housing 1 close to the pump cover 2 and covers the notch of the connection groove 18. One end of the upper pump housing 6 close to the lower pump housing 1 is in contact with one end of the lower pump housing 1 close to the pump cover 2. The upper pump housing 6 is coaxially provided with a second communication hole 61, and the connecting shaft 5 is embedded in the second communication hole 61. One end of the upper pump housing 6 away from the lower pump housing 1 is provided with an upper weight-reducing groove 63, and the upper weight-reducing groove 63 is arranged around the second communication hole 61. A plurality of connecting columns 612 are fixedly connected to the bottom of the upper weight-reducing groove 63, and the plurality of connecting columns 612 are circumferentially spaced apart along the upper pump housing 6. In this embodiment, there are thirteen connecting columns 612. A second connection hole 64 is coaxially provided at one end of the connecting column 612 away from the bottom of the upper weight-reducing groove 63, and the second connection hole 64 penetrates through the upper pump housing 6. The lower pump housing 1 is provided with a third connection hole 110. The number of the third connection holes 110 is the same as that of the second connection holes 64 and they correspond one by one. The second connection holes 64 and the third connection holes 110 are used for bolts to pass through and be threadedly connected to the gearbox housing.

[0037] Reinforcing ribs 65 are fixedly connected to the bottom of the upper weight-reducing groove 63. The reinforcing ribs 65 include a first reinforcing rib 651, a second reinforcing rib 652, and a third reinforcing rib 653. Two ends of the first reinforcing rib 651 are respectively fixedly connected to the inner and outer side walls of the upper weight-reducing groove 63, and one first reinforcing rib 651 is arranged between two adjacent connecting columns 612. Two ends of the second reinforcing rib 652 are respectively fixedly connected to the side wall of the connecting column 612 and the inner wall of the upper weight-reducing groove 63. The number of the second reinforcing ribs 652 is the same as that of the connecting columns 612 and they correspond one by one. Two ends of the third reinforcing rib 653 are respectively fixedly connected between two connecting columns 612, and there are six third reinforcing ribs 653.

[0038] Refer to Figure 3, one end of the upper pump housing 6 close to the lower pump housing 1 is provided with a receiving groove 611, and the receiving groove 611 communicates with the second communication hole 61. The limiting strip 112 is embedded in the receiving groove 611, and the outer wall of the limiting strip 112 fits against the groove wall of the receiving groove 611. A fixing column 613 is fixedly connected to the bottom of the upper weight-reducing groove 63. There are five fixing columns 613, and the five fixing columns 613 are circumferentially and evenly distributed around the axis of the upper pump housing 6. One end of the upper pump housing 6 close to the lower pump housing 1 is provided with a first fixing hole 62. The number of the first fixing holes 62 is the same as that of the fixing columns 613 and they correspond one by one. The distances from the axes of the five first fixing holes 62 to the axis of the upper pump housing 6 are all equal. Four first fixing holes 62 are located outside the receiving groove 611, and one first fixing hole 62 communicates with the receiving groove 611. A first connection hole 19 is provided at the bottom of the installation cavity 15 close to the first communication hole 11. The number of the first connection holes 19 is the same as that of the first fixing holes 62 and they correspond one by one. The positioning block 21 close to one side of the connecting shaft 5 is provided with a fifth connection hole 212. The axis of the fifth connection hole 212 coincides with the axis of the first fixing hole 62 located in the receiving groove 611. The first connection hole 19 and the fifth connection hole 212 are used for bolts to pass through and be threadedly connected to the first fixing hole 62.

[0039] Referring to Figure 2 and Figure 4 , an engine transmission pump housing further includes a protection mechanism 7. The protection mechanism 7 includes a sealing assembly 71. One end of the lower pump housing 1 close to the upper pump housing 6 is provided with a sealing groove 111. The sealing groove 111 is arranged around the connecting groove 18. The number of the sealing grooves 111 and the sealing assembly 71 is the same as that of the connecting grooves 18 and they correspond one by one. The sealing assembly 71 includes a sealing member 711, a slider 712 and a one-way valve 714. One end of the upper pump housing 6 close to the lower pump housing 1 is provided with a sliding groove 66. The number of the sliding grooves 66 is the same as that of the sealing grooves 111 and they correspond one by one. The slider 712 is slidably embedded in the sliding groove 66. The sliding direction of the slider 712 is parallel to the axis direction of the connecting shaft 5. The side wall of the slider 712 fits against the groove wall of the sliding groove 66. The sealing member 711 is fixedly connected to one end of the slider 712 close to the lower pump housing 1. The sealing member 711 is used to be embedded in the sealing groove 111. The side wall of the sealing member 711 fits against the groove wall of the sealing groove 111. The slider 712 is provided with an air inlet channel 7121. The air inlet channel 7121 penetrates through the slider 712 along the sliding direction of the slider 712. The one-way valve 714 is embedded in the air inlet channel 7121. The one-way valve 714 realizes one-way conduction from the outside to the sliding groove 66.

[0040] Referring to Figure 5, the sealing assembly 71 further includes a first reset member 713. The first reset member 713 is connected between the slider 712 and the upper pump housing 6. The first reset member 713 causes the end of the slider 712 close to the lower pump housing 1 to have a tendency to extend out of the chute 66. In this embodiment, the first reset member 713 is a spring. The bottom of the chute 66 is provided with two embedding grooves 614. The two embedding grooves 614 are spaced along the length direction of the chute 66. The number of the first reset members 713 is the same as and corresponds to the number of the embedding grooves 614 one by one. One end of the first reset member 713 is connected to the bottom of the embedding groove 614, and the other end of the first reset member 713 is connected to the end of the slider 712 close to the bottom of the chute 66.

[0041] Referring to Figure 4 , the upper pump housing 6 is provided with a connection cavity 610. The connection cavity 610 is arc-shaped and is located on the side of the chute 66 away from the lower pump housing 1. The bottom of the chute 66 is provided with a plurality of second connection channels 615. The plurality of second connection channels 615 are spaced along the length direction of the chute 66. The second connection channels 615 communicate with the connection cavity 610. An air outlet channel 69 is provided at the side wall of the connection cavity 610 away from the chute 66. The air outlet channel 69 communicates with the outside. The protection mechanism 7 further includes a solenoid valve 73. The solenoid valve 73 is embedded in the air outlet channel 69 to realize the on-off of the air outlet channel 69. The bottom of the chute 66 is provided with an installation groove 616. The sealing assembly 71 further includes a contact switch 715. The number of the installation grooves 616 and the contact switches 715 is the same as and corresponds to the number of the chutes 66 one by one. The contact switch 715 is fixedly connected to the bottom of the installation groove 616. The contact switch 715 is electrically connected to the solenoid valve 73. The contact switch 715 is used for the end of the slider 712 close to the bottom of the chute 66 to abut against. In this embodiment, when all three contact switches 715 are closed, the solenoid valve 73 is in a connected state.

[0042] A groove 67 is provided at the hole wall of the second connection hole 64 near the connection cavity 610. The protection mechanism 7 further includes a plugging assembly 72. The number of the plugging assemblies 72 is the same as and corresponds one by one to the number of the grooves 67. The plugging assembly 72 includes an airbag 721, a closing plate 722 and a second reset member 723. A first connection channel 68 is provided at the outer cavity wall of the connection cavity 610. The number of the first connection channels 68 is the same as and corresponds one by one to the number of the airbags 721. The first connection channel 68 is communicated with the airbag 721. The closing plate 722 is slidably embedded in the groove 67. The sliding direction of the closing plate 722 is perpendicular to the axis direction of the second connection hole 64. One end of the closing plate 722 is fixedly connected to one end of the airbag 721 away from the bottom of the groove 67. A fixing groove 617 is provided at the hole wall of the second connection hole 64 away from the groove 67. The fixing groove 617 is used for the closing plate 722 to be embedded to close the second connection hole 64. A guiding groove 618 is provided at the groove wall of the groove 67 away from the lower pump housing 1. A guiding block 7221 is fixedly connected to the side of the closing plate 722 away from the lower pump housing 1. The guiding block 7221 is slidably embedded in the guiding groove 618. The second reset member 723 is connected between the guiding block 7221 and the upper pump housing 6. The second reset member 723 makes the closing plate 722 have a tendency 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 surface of the guiding block 7221 near the second connection hole 64, and the other end of the second reset member 723 is connected to the groove wall of the guiding groove 618 near the second connection hole 64.

[0043] The implementation principle of the engine transmission pump housing in the embodiment of the present application is as follows: The impeller 3 and the transmission shaft 43 are embedded in the accommodation cavity 12. The pump cover 2 is connected to the lower pump housing 1 to cover the accommodation cavity 12. One end of the transmission shaft 43 penetrates through the pump cover 2. The bolt passes through the fourth connection 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 communication hole 11. The two sprockets 41 are respectively connected to the outer circumference of the connecting shaft 5 and the transmission shaft 43. The chain 42 is sleeved on the outer circumference of the two sprockets 41.

[0044] Bring the upper pump housing 6 close to the lower pump housing 1, insert the limit strip 112 into the receiving groove 611, insert the seal 711 into the sealing groove 111, the seal 711 abuts against the bottom of the sealing groove 111, drive the slider 712 to slide and be embedded in the sliding groove 66 against the elastic force of the first reset member 713, push the air in the sliding groove 66 into the connection cavity 610 through the second connection channel 615, and then squeeze it into the airbag 721 through the second connection channel 615. The airbag 721 expands, pushing the closing plate 722 to slide and be embedded in the second connection hole 64 against the elastic force of the second reset member 723 and be embedded in the fixing groove 617. The bolt passes through the first connection hole 19 and is threadedly connected to the first fixing hole 62 to realize the fixed connection between 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 closely attached, the slider 712 abuts against the bottom of the sliding groove 66, the slider 712 abuts against the contact switch 715, the contact switch 715 closes, the solenoid valve 73 opens, and the closing plate 722 is embedded in the groove 67 under the action of the elastic force of the second reset member 723, and the air in the airbag 721 is squeezed out of the upper pump housing 6 through the first connection channel 68, the connection cavity 610 and the air outlet channel 69. The bolt passes through the second connection hole 64 and the third connection hole 110 and is threadedly connected to the gearbox housing to realize the fixed connection between the upper pump housing 6, the lower pump housing 1 and the gearbox housing.

[0045] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. Engine gearbox pump housing, characterized in that: It 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 communication hole (11); the connecting shaft (5) is coaxially and rotatably embedded in the first communication hole (11); one side of the lower pump housing (1) along the axis direction of the connecting shaft (5) is provided with a receiving cavity (12); the pump cover (2) is connected to the lower pump housing (1) and covers the opening of the receiving cavity (12); an oil inlet (13) and an oil outlet (14) are provided at the cavity wall of the receiving cavity (12); the oil inlet (13) and the oil outlet (14) are communicated with 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).

2. The engine gearbox pump housing 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 engine gearbox pump housing according to claim 1, characterized in that: It further includes an upper pump housing (6); several installation cavities (15) are provided on one side of the lower pump housing (1) away from the pump cover (2); the installation cavities (15) are used for the piston to be embedded; a ring groove (16) is provided on the outer periphery of one end of the lower pump housing (1) away from the pump cover (2); several oil delivery channels (17) are provided at the bottom of the ring groove (16); the oil delivery channels (17) are communicated with the installation cavities (15); a connecting groove (18) is provided on one side of the lower pump housing (1) close to the pump cover (2); the connecting groove (18) is communicated with 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 a second communication hole (61); the connecting shaft (5) is embedded in the second communication hole (61); a first fixing hole (62) is provided on one side of the upper pump housing (6) close to the lower pump housing (1); the lower pump housing (1) is provided with a first connection hole (19); the first connection hole (19) is used for a bolt to pass through and be threadedly connected with the first fixing hole (62).

4. The engine gearbox pump housing according to claim 3, characterized in that: An upper weight-reducing groove (63) is provided on one side of the upper pump housing (6) away from the lower pump housing (1); the upper weight-reducing groove (63) is arranged around the second communication hole (61); several second connection holes (64) are provided at the bottom of the upper weight-reducing groove (63); several of the second connection holes (64) are circumferentially and spaced apart along the upper pump housing (6); the lower pump housing (1) is provided with third connection holes (110); the number of the third connection holes (110) is the same as that of the second connection holes (64) and they correspond one by one; the second connection holes (64) and the third connection holes (110) are used for a bolt to pass through and be threadedly connected with the gearbox housing.

5. The engine gearbox pump housing according to claim 4, characterized in that: Several reinforcing ribs (65) are connected to the bottom of the upper weight-reducing groove (63).

6. The engine gearbox pump housing according to claim 4, wherein: It further includes a seal (711); a seal groove (111) is provided on one side of the lower pump housing (1) close to the upper pump housing (6); the seal groove (111) is arranged around the connecting groove (18); the number of the seals (711) is the same as that of the seal grooves (111) and they correspond one by one; the seal (711) is connected to the upper pump housing (6); the seal (711) is used to be embedded in the seal groove (111); the side wall of the seal (711) is in fit with the groove wall of the seal groove (111).

7. The engine gearbox pump housing according to claim 6, characterized in that: It further 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); a chute (66) is provided on one side of the upper pump housing (6) close to the lower pump housing (1); the slider (712) is slidably embedded in the chute (66); the sliding direction of the slider (712) is parallel to the axis direction of the connecting shaft (5); the seal (711) is connected to one end of the slider (712) close to 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) have a tendency to extend out of the chute (66); the slider (712) is provided with an air inlet channel (7121); the one-way valve (714) is embedded in the air inlet channel (7121); the one-way valve (714) realizes one-way conduction from the outside to the chute (66); a groove (67) is provided on the pore wall of the second connecting hole (64); the airbag (721) is embedded in the groove (67); a first connecting channel (68) is provided at the bottom of the chute (66); the first connecting channel (68) is communicated with the airbag (721); the airbag (721) is used to block the second connecting hole (64); the upper pump housing (6) is provided with an air outlet channel (69); the air outlet channel (69) is communicated with the chute (66) and the outside; the solenoid valve (73) is embedded in the air outlet channel (69); the contact switch (715) is embedded in the chute (66); the contact switch (715) is electrically connected to the solenoid valve (73); the contact switch (715) is used for the end of the slider (712) close to the bottom of the chute (66) to abut; when a plurality of the contact switches (715) are all closed; the solenoid valve (73) is in a communicating state.

8. The engine gearbox pump housing according to claim 7, 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 communicated with the first connecting channel (68).

9. The engine gearbox pump housing according to claim 7, characterized in that: It further includes a closing plate (722) and a second reset member (723); the closing plate (722) is slidably embedded in the groove (67); the sliding direction of the closing plate (722) is perpendicular to the axis direction of the second connecting hole (64); one end of the closing plate (722) is connected to the airbag (721); the second reset member (723) is connected between the closing plate (722) and the upper pump housing (6); the second reset member (723) makes the closing plate (722) have a tendency to be embedded in the groove (67).

10. The engine gearbox pump housing according to claim 3, characterized in that: One side of the upper pump housing (6) close to the lower pump housing (1) is provided with a receiving groove (611); a limiting strip (112) is connected to one side of the lower pump housing (1) close to 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 fit with the groove wall of the receiving groove (611).

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