RV speed reducer

Abstract

The invention relates to the field of electric vehicle transmission devices, in particular to an RV speed reducer. The device comprises a shell; the periphery of the output disc is provided with a circle of oil storage groove, and the output disc is provided with a through cavity communicated with the rotating groove and the oil storage groove and a circulation hole communicated with the transmission cavity and the output end; the circulating hole communicates with the penetrating cavity; a circulation structure is arranged on the penetrating cavity; the circulation structure comprises a guide assembly movably penetrating through the penetrating cavity, and further comprises a circulation assembly moving along the guide assembly, wherein the two ends of the guide assembly communicate with the rotating groove and the oil storage groove correspondingly. The circulation assembly moves and rotates in the penetrating cavity, lubricating oil enters and exits from the oil storage cavity, the dredging range and the dredging strength are flexibly controlled, dredging and circulation are combined, and circulation of the lubricating oil is efficiently promoted. The circulation of the lubricating oil not only facilitates the reduction of the abrasion among the structures, but also facilitates the dissipation of heat, and the maintenance and guarantee of the performance of the electric vehicle are realized by prolonging the service life of the RV speed reducer.

Description

Technical Field

[0001] The present invention relates to the field of electric vehicle transmission devices, and particularly to an RV speed reducer. Background Art

[0002] The working principle of the RV speed reducer combines the characteristics of planetary transmission and cycloidal drive. Through the revolution and rotation of the planetary gears, and the meshing of the cycloidal pin gear and the pin gear housing, high-efficiency speed reduction transmission is achieved. This structure enables the RV speed reducer to have high precision, high rigidity, and high load-bearing capacity, and is particularly widely used in the transmission between the drive motor and the wheels of electric vehicles and auxiliary systems (such as electric power steering). The specific functions of the RV speed reducer in electric vehicles are as follows:

[0003] 1. Speed reduction and torque increase: Convert the high-speed, low-torque output of the motor into low-speed, high-torque output to meet the vehicle driving requirements.

[0004] 2. Improve transmission efficiency: Efficiently transmit power, reduce energy loss, and increase the driving range.

[0005] 3. Improve controllability: Improve performance such as acceleration and climbing by precisely controlling the speed and torque.

[0006] 4. Reduce the motor load: Reduce the motor load and extend its service life.

[0007] 5. Compact structure: The RV speed reducer is designed compactly, which helps to save space and facilitate vehicle layout.

[0008] Chinese Patent Publication No. CN116066526B discloses an RV speed reducer for industrial robots, including an RV speed reducer body. The top of the RV speed reducer body is fixedly connected with an output component, and the bottom surface of the RV speed reducer body is fixedly connected with a driving mechanism. The RV speed reducer body includes a main body housing. An output disk is arranged inside the main body housing. A fixing plate is fixedly connected to the inner wall of the main body housing. A rotating groove is arranged on the outer wall of the output disk, and a planetary gear set is rotatably connected to the inner wall of the rotating groove.

[0009] The above RV speed reducer has the following deficiencies: As the output disk rotates, the oil is prone to flow and spread outward under the action of centrifugal force, resulting in a single flow direction and a small flow range of the lubricating oil, which further leads to insufficient lubricating oil fluidity and is not conducive to improving the wear problem. In addition, the existing lubricating oil flow channels are relatively narrow, which is also not conducive to the rapid flow of viscous lubricating oil. These will have an important impact on the performance of electric vehicles and even pose potential safety hazards. Summary of the Invention

[0010] In view of the problems existing in the background technology, an RV reducer is proposed. Through the movement and rotation of the circulation component in the through cavity, the lubricating oil is coordinated to enter and exit the oil storage cavity, flexibly controlling the dredging range and intensity. The combination of dredging and circulation effectively promotes the circulation of the lubricating oil. The circulation of the lubricating oil not only helps to reduce the wear between structures, but also facilitates the dissipation of heat, prolonging the service life of the RV reducer and maintaining and ensuring the performance of electric vehicles.

[0011] The present invention proposes an RV reducer, including a housing; an output disk is rotatably arranged at the output end of the housing, and a rotation groove for installing a transmission shaft and a crankshaft is provided in the center: a circle of oil storage grooves is arranged on the outer periphery of the output disk, and a through cavity communicating the rotation groove and the oil storage groove is arranged horizontally on the output disk, and a circulation hole communicating the transmission cavity and the output end is arranged vertically on the output disk; the circulation hole communicates with the through cavity; a circulation structure is arranged on the through cavity; the circulation structure includes a guiding component that movably passes through the through cavity and has two ends respectively communicating with the rotation groove and the oil storage groove, and further includes a circulation component that moves along the guiding component; the circulation component has an oil storage space inside and a dredging structure outside, and moves with the rotation of the output disk. On the one hand, it dredges the through cavity and the circulation hole through movement, and on the other hand, it drives the circulation of the lubricating oil through movement.

[0012] Preferably, the circulation holes are arranged in pairs and are respectively located on the upper and lower cavity walls of the through cavity. The upper circulation hole communicates with the transmission cavity, and the lower circulation hole communicates with the output end.

[0013] Preferably, the guiding component includes a guiding rod passing through the through cavity; one end of the guiding rod extends into the rotation groove and is rotatably connected to a fixed rod, and one end of the guiding rod extends into the oil storage groove and is rotatably connected to a sliding rod; the circulation component is slidably arranged on the guiding rod.

[0014] Preferably, a guiding groove is arranged in the oil storage groove; the sliding rod is slidably arranged in the guiding groove; an installation hole is arranged in the rotation groove; the fixed rod is installed in the installation hole.

[0015] Preferably, a first elastic member is arranged in the guiding groove; the first elastic member is located on both sides of the sliding rod.

[0016] Preferably, a second elastic member is arranged on the guiding rod; the second elastic member is located on both sides of the circulation component.

[0017] Preferably, the circulation component includes a sliding sleeve slidably arranged on the guiding rod; an oil storage cylinder is arranged outside the sliding sleeve; a rotatable adjusting sleeve is arranged outside the oil storage cylinder, and adsorption disks connecting the oil storage cylinder are respectively arranged at both ends of the adjusting sleeve; suction accessories corresponding to the adsorption disks one by one are arranged on both sides of the guiding rod; the second elastic member is located between the suction accessory and the adsorption disk on the same side.

[0018] Preferably, drive structures and a lubricating oil pumping and discharging pump are provided at both ends of the oil storage cylinder, and an oil storage cavity is arranged inside the oil storage cylinder; a circulation hole communicating with the oil storage cavity is arranged on the side wall of the oil storage cylinder; the oil storage cavity is the oil storage space and is communicated with the lubricating oil pumping and discharging pump; the adjusting sleeve is driven by the drive structure and is rotatably connected to the oil storage cylinder, and adjusting holes corresponding to the circulation holes one by one are arranged on the adjusting sleeve.

[0019] Preferably, a cleaning strip is arranged on the adjusting sleeve; the cleaning strip is the dredging structure.

[0020] Preferably, a slide rail is arranged on the guide rod; a slide bar cooperating with the slide rail is arranged on the sliding sleeve.

[0021] Compared with the prior art, the present invention has the following beneficial technical effects: a circulation structure acting in the through cavity arranged between the rotating groove and the oil storage groove. The rotation of the output disk generates centrifugal force to drive the guide rod to rotate, and the sliding sleeve slides along the guide rod. During the sliding process, the through cavity and the circulation holes are dredged. By rotating the adjusting sleeve, the communication between the circulation holes and the adjusting holes is staggered. The lubricating oil pumping and discharging pump controls the inflow and outflow of lubricating oil into and from the oil storage cavity to promote the circulation of lubricating oil. The adjusting sleeve is driven to move by the adsorption of the electromagnet on the metal disk. The moving direction and moving track of the sliding rod are controlled by changing the rotation direction and rotation speed of the output disk. Finally, through the movement and rotation of the circulation component in the through cavity, combined with the inflow and outflow of lubricating oil into and from the oil storage cavity, the dredging range and dredging intensity are flexibly controlled, and the dredging and circulation are combined to efficiently promote the circulation of lubricating oil among the rotating groove, the oil storage groove, the through cavity, the circulation holes and the transmission cavity. The circulation of lubricating oil not only helps to reduce the wear between structures, but also helps to dissipate heat, and the service life of the RV reducer is extended to maintain and guarantee the performance of the electric vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the top view of the RV reducer in the present invention;

[0023] Figure 2 is the bottom view of the RV reducer in the present invention;

[0024] Figure 3 is the bottom view of the output disk in the present invention;

[0025] Figure 4 is Figure 3 the enlarged view at A in

[0026] Figure 5 is Figure 3 the sectional view at A in

[0027] Figure 6 is the schematic diagram of the circulation structure in the present invention;

[0028] Figure 7 is the sectional view of the circulation structure in the present invention;

[0029] Figure 8 For Figure 7 The enlarged view at position B in

[0030] Figure 9 This is the sectional view of the circulation component in the present invention.

[0031] Reference numerals: 1, housing; 2, input end; 3, transmission shaft; 4, output end; 5, output disc; 501, through cavity; 502, circulation hole; 503, oil storage groove; 504, guiding groove; 6, crankshaft; 7, rotating groove; 8, circulation structure; 801, guiding component; 80101, fixed rod; 80102, sliding rod; 80103, adsorbing member; 80104, rotating sleeve; 80105, guiding rod; 802, circulation component; 80201, adsorbing disc; 80202, adjusting sleeve; 80203, oil storage cylinder; 80204, sliding sleeve; 80205, lubricating oil pumping and discharging pump; 80206, driving structure; 80207, circulation hole; 80208, adjusting hole; 80209, sliding strip; 80210, oil storage cavity; 80211, cleaning strip; 803, second elastic member; 804, first elastic member. Detailed implementation manners

[0032] In the first embodiment, as Figures 1-3 shown, an RV reducer proposed by the present invention includes a housing 1; an output disc 5 is rotatably arranged on the output end 4 of the housing 1, a rotating groove 7 for installing a transmission shaft 3 and a crankshaft 6 is provided in the center, an oil storage groove 503 is arranged around the outer periphery of the output disc 5, a through cavity 501 communicating the rotating groove 7 and the oil storage groove 503 is arranged on the output disc 5 in the horizontal direction, and a circulation hole 502 communicating the transmission cavity and the output end 4 is arranged on the output disc 5 in the vertical direction; the circulation hole 502 communicates with the through cavity 501; a circulation structure 8 is arranged on the through cavity 501.

[0033] As Figures 4-5 shown, the circulation structure 8 includes a guiding component 801 that movably passes through the through cavity 501 and communicates with the rotating groove 7 and the oil storage groove 503 at both ends respectively, and further includes a circulation component 802 that moves along the guiding component 801; the circulation component 802 has an internal oil storage space and an external dredging structure, and moves with the rotation of the output disc 5. On the one hand, it dredges the through cavity 501 and the circulation hole 502 through the movement, and on the other hand, it drives the lubricating oil to circulate through the movement.

[0034] In a further embodiment, the circulation holes 502 are arranged in pairs and are respectively located on the upper and lower cavity walls of the through cavity 501. The upper circulation hole 502 communicates with the transmission cavity, and the lower circulation hole 502 communicates with the output end 4.

[0035] The transmission cavity and the output end 4 are connected through the circulation hole 502, and the through cavity 501 is connected to the rotation groove 7 and the oil storage tank 503, so as to form a lubricating oil passage inside and outside the housing 1, facilitating the large-scale circulation of lubricating oil during the operation of the RV reducer and ensuring the lubrication effect.

[0036] As Figures 6-7 shown, the guiding component 801 includes a guiding rod 80105 passing through the through cavity 501; one end of the guiding rod 80105 extends into the rotation groove 7 and is rotatably connected to the fixing rod 80101, and one end of the guiding rod 80105 extends into the oil storage tank 503 and is rotatably connected to the sliding rod 80102; the circulation component 802 is slidably arranged on the guiding rod 80105. When the output disk 5 starts to rotate, a corresponding centrifugal force causes the circulation component 802 to slide along the guiding rod 80105 under the action of the centrifugal force. During the sliding process, the through cavity 501 and the circulation hole 502 can be dredged, and the lubricating oil can also be driven to circulate.

[0037] A guiding groove 504 is arranged in the oil storage tank 503; the sliding rod 80102 is slidably arranged in the guiding groove 504; an installation hole is arranged in the rotation groove 7; the fixing rod 80101 is installed in the installation hole.

[0038] In a further embodiment, the guiding groove 504 is arc-shaped, with the fixing rod 80101 as the center position of the arc.

[0039] In a further embodiment, rotating sleeves 80104 connecting the guiding rod 80105 are arranged on both the sliding rod 80102 and the fixing rod 80101.

[0040] When the output disk 5 rotates in one direction, the sliding rod 80102 rotates in the opposite direction along the guiding groove 504. The circulation component 802 slides along the rotating guiding rod 80105, thereby achieving large-scale dredging.

[0041] A first elastic member 804 is arranged in the guiding groove 504; the first elastic member 804 is located on both sides of the sliding rod 80102.

[0042] In a further embodiment, the first elastic member 804 is arranged along the arc-shaped guiding groove 504 and is set as a corrugated metal elastic sheet.

[0043] When the output disk 5 rotates in one direction, the sliding rod 80102 squeezes / stretches the first elastic member 804 along the guiding groove 504. When the rotation speed or rotation direction of the output disk 5 changes, the centrifugal force will change, and the sliding rod 80102 will displace under the action of the first elastic member 804, thereby driving the circulation component 802 to achieve its dredging effect.

[0044] A second elastic member 803 is arranged on the guiding rod 80105; the second elastic member 803 is located on both sides of the circulation component 802.

[0045] In a further embodiment, the second elastic member 803 is provided as a spring.

[0046] The output disk 5 rotates, and the circulation assembly 802 squeezes / stretches the second elastic member 803 along the guide rod 80105. When the centrifugal force changes, the circulation assembly 802 is displaced under the action of the second elastic member 803, thereby achieving its dredging effect.

[0047] As Figures 8-7 shown, the circulation assembly 802 includes a sliding sleeve 80204 slidably disposed on the guide rod 80105; an oil storage cylinder 80203 is disposed outside the sliding sleeve 80204; a rotatable adjusting sleeve 80202 is disposed outside the oil storage cylinder 80203, and adsorption disks 80201 connecting the oil storage cylinder 80203 are respectively disposed at both ends of the adjusting sleeve 80202; suction members 80103 that are in one-to-one correspondence and cooperation with the adsorption disks 80201 are disposed on two pairs of the guide rod 80105; the second elastic member 803 is located between the suction members 80103 and the adsorption disks 80201 on the same side.

[0048] In a further embodiment, the suction member 80103 is provided as an electromagnet; the adsorption disk 80201 is provided as a metal disk. By setting the electromagnet to be energized, the metal disk is adsorbed to counteract the centrifugal force, thereby controlling the movement of the circulation assembly 802. Through the combined action of magnetic attraction and centrifugal force, the circulation assembly 802 is promoted to be flexibly dredged.

[0049] Driving structures 80206 and lubricating oil pumping and discharging pumps 80205 are disposed at both ends of the oil storage cylinder 80203, an oil storage chamber 80210 is disposed inside the oil storage cylinder 80203; a circulation hole 80207 communicating with the oil storage chamber 80210 is disposed on the side wall of the oil storage cylinder 80203; the oil storage chamber 80210 is an oil storage space and is communicated with the lubricating oil pumping and discharging pump 80205; the adjusting sleeve 80202 is driven by the driving structure 80206 and is rotatably connected to the oil storage cylinder 80203, and adjusting holes 80208 corresponding to the circulation holes 80207 one by one are disposed on the adjusting sleeve 80202.

[0050] In a further embodiment, the driving structure 80206 includes a gear ring disposed along the sleeve opening of the adjusting sleeve 80202; the gear rotates on the oil storage cylinder 80203 driven by a motor and meshes with the gear ring at the same time.

[0051] Through the transmission of gears and toothed rings in the drive structure 80206, the adjusting sleeve 80202 rotates outside the oil storage cylinder 80203. By rotating the adjusting sleeve 80202, the communication and intersection of the flow hole 80207 and the adjusting hole 80208 are achieved. When the flow hole 80207 and the adjusting hole 80208 are in communication, the lubricating oil pumping and discharging pump 80205 can control the inflow and outflow of lubricating oil into and out of the oil storage cavity 80210, and thus control the flow of lubricating oil. By rotating the adjusting sleeve 80202, the through cavity 501 can be dredged, and the dirt that may exist on the flow hole 80207 and the adjusting hole 80208 can be removed to avoid flow blockage. Moreover, by changing the size of the communication space, the pressure of the lubricating oil inflow and outflow can be adjusted, and the fluidity of the lubricating oil can be increased.

[0052] A cleaning strip 80211 is arranged on the adjusting sleeve 80202; the cleaning strip 80211 is the dredging structure.

[0053] In a further embodiment, multiple groups of cleaning strips 80211 are arranged at intervals along the side wall of the adjusting sleeve 80202; the adjusting hole 80208 is arranged between adjacent cleaning strips 80211. When the adjusting sleeve 80202 moves and rotates, the cleaning strip 80211 dredges and cleans the through cavity 501 and the flow hole 502.

[0054] A slide rail is arranged on the guide rod 80105; a slide bar 80209 that cooperates with the slide rail is arranged on the sliding sleeve 80204; through the cooperation of the slide rail and the slide bar 80209, the oil storage cylinder 80203 always moves horizontally along the guide rod 80105, and the moving track can also be kept stable when the adjusting sleeve 80202 rotates.

[0055] Embodiment 2: Based on the RV reducer in Embodiment 1, an RV reducer lubrication and wear reduction method is proposed, and the steps are as follows: The drive motor drives the transmission shaft 3 to rotate through the input end 2, and drives the output disk 5 to rotate after decelerating transmission by the crankshaft 6. The rotation of the output disk 5 will drive the sliding rod 80102 to squeeze / stretch the first elastic member 804 along the guiding groove 504. At the same time, the sliding sleeve 80204 will squeeze / stretch the second elastic member 803 along the guiding rod 80105 under the action of centrifugal force. During the above process, the sliding sleeve 80204 moves and rotates, so as to dredge the through cavity 501. Then, through the transmission of the gear and the toothed ring in the driving structure 80206, the adjusting sleeve 80202 rotates outside the oil storage cylinder 80203. Then, when the adjusting sleeve 80202 rotates, the communication between the circulation hole 80207 and the adjusting hole 80208 is staggered. The lubricating oil pumping and discharging pump 80205 controls the inflow and outflow of lubricating oil from the oil storage cavity 80210 to promote the circulation of lubricating oil. Through the rotation of the adjusting sleeve 80202 itself, not only can the through cavity 501 be dredged, but also the dirt that may exist on the circulation hole 80207 and the adjusting hole 80208 can be removed to avoid circulation blockage. Moreover, by changing the size of the communication space, the pressure of the lubricating oil inflow and outflow can be adjusted to increase the fluidity of the lubricating oil. When it is necessary to adjust the moving range and direction, the electromagnet can be energized, and the adjusting sleeve 80202 can be driven to move by adsorbing the metal disk to counteract the centrifugal force. The centrifugal force can be adjusted by changing the rotation direction and speed of the output disk 5, so as to control the moving direction and moving track of the sliding rod 80102. Finally, through the movement and rotation of the circulation component 802 in the through cavity 501, combined with the inflow and outflow of lubricating oil from the oil storage cavity 80210, the combination of dredging and circulation can efficiently promote the circulation of lubricating oil among the rotating groove 7, the oil storage groove 503, the through cavity 501, the circulation hole 502 and the transmission cavity. The circulation of lubricating oil not only helps to reduce the wear between structures, but also helps to dissipate heat, so as to extend the service life of the RV reducer and maintain and guarantee the performance of electric vehicles.

[0056] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Within the scope of knowledge possessed by those skilled in the art to which the present invention pertains, various changes can be made without departing from the gist of the present invention.

Claims

1. An RV reducer, comprising a housing (1); an output disc (5) rotatably arranged on an output end (4) of the housing (1), a rotation groove (7) for mounting a transmission shaft (3) and a crankshaft (6) is arranged at the center, characterized in that: An oil storage groove (503) is arranged around the outer periphery of the output disk (5); a through cavity (501) is arranged on the output disk (5) in a horizontal direction to connect the rotating groove (7) and the oil storage groove (503); a flow hole (502) is arranged on the output disk (5) in a vertical direction to connect the transmission cavity and the output end (4); the flow hole (502) is connected to the through cavity (501); and a flow structure (8) is arranged on the through cavity (501); The circulation structure (8) comprises a guide component (801) that movably passes through the through cavity (501) and is respectively connected to the rotating groove (7) and the oil storage groove (503) at both ends, and also comprises a circulation component (802) that moves along the guide component (801); the circulation component (802) has an internal oil storage space and an external dredging structure, and moves with the rotation of the output disk (5). On the one hand, the through cavity (501) and the circulation hole (502) are dredged by the movement, and on the other hand, the movement drives the circulation of lubricating oil.

2. The RV reducer according to claim 1, characterized in that: The circulation holes (502) are arranged in pairs and are respectively located on the upper and lower cavity walls of the through cavity (501). The upper circulation hole (502) is connected to the transmission cavity, and the lower circulation hole (502) is connected to the output end (4).

3. The RV reducer according to claim 1, characterized in that: The guide assembly (801) includes a guide rod (80105) passing through the through cavity (501); one end of the guide rod (80105) extends into the rotating groove (7) and is rotatably connected to the fixed rod (80101); one end of the guide rod (80105) extends into the oil storage tank (503) and is rotatably connected to the sliding rod (80102); the circulation assembly (802) is slidably arranged on the guide rod (80105).

4. The RV reducer according to claim 3, characterized in that: A guide groove (504) is provided in the oil storage tank (503); the sliding rod (80102) is slidably provided in the guide groove (504); A mounting hole is arranged in the rotating groove (7); and a fixing rod (80101) is installed in the mounting hole.

5. The RV reducer according to claim 4, characterized in that: An elastic member 1 (804) is disposed in the guide groove (504); the elastic member 1 (804) is located on both sides of the sliding rod (80102).

6. The RV reducer according to claim 3, characterized in that: The guide rod (80105) is provided with a second elastic member (803); the second elastic member (803) is located on both sides of the circulation component (802).

7. The RV reducer according to claim 6, characterized in that: The circulation component (802) comprises a sliding sleeve (80204) slidably arranged on a guide rod (80105); an oil storage cylinder (80203) is arranged outside the sliding sleeve (80204); a rotatable adjustment sleeve (80202) is arranged outside the oil storage cylinder (80203), and adsorption plates (80201) connected to the oil storage cylinder (80203) are respectively arranged at both ends of the adjustment sleeve (80202); Two pairs of guide rods (80105) are provided with adsorption parts (80103) corresponding one to one with the adsorption plates (80201); The second elastic member (803) is located between the adsorption member (80103) and the adsorption plate (80201) on the same side.

8. The RV reducer according to claim 7, characterized in that: A driving structure (80206) and a lubricating oil extraction pump (80205) are arranged at both ends of the oil storage cylinder (80203); an oil storage chamber (80210) is arranged inside the oil storage cylinder (80203); and a flow hole (80207) communicating with the oil storage chamber (80210) is arranged on the side wall of the oil storage cylinder (80203); The oil storage chamber (80210) is an oil storage space, which is connected to the lubricating oil extraction pump (80205); The adjusting sleeve (80202) is driven by the driving structure (80206) to be rotatably connected to the oil storage cylinder (80203), and the adjusting sleeve (80202) is provided with adjusting holes (80208) corresponding to the circulation holes (80207) one by one.

9. The RV reducer according to claim 8, characterized in that: A cleaning strip (80211) is arranged on the adjusting sleeve (80202); the cleaning strip (80211) is a dredging structure.

10. The RV reducer according to claim 7, characterized in that: A slide rail is arranged on the guide rod (80105); and a slide bar (80209) matching with the slide rail is arranged on the slide sleeve (80204).

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