An RV reducer

Abstract

The present invention relates to the field of electric vehicle transmission devices, and in particular to an RV reducer. It includes a housing; an output disc is rotatably arranged on the output end of the housing, and a rotating groove is arranged in the center; a circle of oil storage grooves is arranged on the outer periphery of the output disc, a through cavity connecting the rotating groove and the oil storage groove is arranged on the output disc, and a flow hole connecting the transmission cavity and the output end is arranged; the flow hole is connected to the through cavity; a flow structure is arranged on the through cavity; the flow structure includes a guide component that moves through the through cavity and is connected to the rotating groove and the oil storage groove at both ends, and also includes a flow component that moves along the guide component. The present invention flexibly controls the dredging range and dredging intensity by coordinating the lubricating oil in and out of the oil storage cavity through the movement and rotation of the flow component in the through cavity, and combines dredging and circulation to efficiently promote the circulation of lubricating oil. The circulation of lubricating oil is not only beneficial to reducing the wear between the various structures, but also beneficial to the dissipation of heat. By extending the service life of the RV reducer, the performance of the electric vehicle can be maintained and guaranteed.

Description

Technical Field

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

[0002] The RV reducer's operating principle combines the characteristics of planetary and cycloid transmissions, achieving efficient reduction transmission through the revolution and rotation of the planetary gears and the meshing of the cycloid pinwheel and the pinion housing. This structure gives the RV reducer high precision, high rigidity, and high load capacity, making it particularly widely used in the transmission between the drive motor and wheels of electric vehicles, as well as in auxiliary systems (such as electric power steering). The specific functions of the RV reducer in electric vehicles are as follows:

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

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

[0005] Improved handling: Acceleration and hill climbing performance are improved through precise control of speed and torque.

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

[0007] Compact structure: The RV reducer has a compact design, which helps save space and facilitates vehicle layout.

[0008] The Chinese patent with authorization publication number CN116066526B discloses an RV reducer for an industrial robot, including an RV reducer body, the top of the RV reducer body is fixedly connected to an output assembly, the bottom surface of the RV reducer body is fixedly connected to a drive mechanism, the RV reducer body includes a main body shell, an output disk is provided inside the main body shell, a fixed plate is fixedly connected to the inner wall of the main body shell, the outer wall of the output disk is provided with a rotating groove, and the inner wall of the rotating groove is rotatably connected to a planetary gear set.

[0009] The aforementioned RV reducer has the following drawbacks: As the output disc rotates, the oil tends to flow and diffuse outward due to centrifugal force, resulting in a single direction of lubricant flow and a narrow circulation range. This leads to insufficient lubricant flow and hinders wear reduction. Furthermore, the existing lubricant flow channel is narrow, which also hinders the rapid circulation of viscous lubricant. These factors can significantly affect the performance of electric vehicles and may even pose safety risks. Summary of the Invention

[0010] To address the challenges presented in the prior art, a RV reducer is proposed. By aligning the movement and rotation of a circulation assembly within a through-hole cavity with the flow of lubricating oil into and out of the oil reservoir, the dredging range and intensity can be flexibly controlled. This combined dredging and circulation effectively promotes the flow of lubricating oil. This flow of lubricating oil not only reduces wear between various components but also facilitates heat dissipation, extending the service life of the RV reducer and thus maintaining and safeguarding the performance of the electric vehicle.

[0011] The present invention proposes an RV reducer, comprising a housing; an output disc is rotatably arranged on the output end of the housing, and a rotating groove for installing a transmission shaft and a crank shaft is arranged in the center: a circle of oil storage grooves is arranged on the outer periphery of the output disc, a through cavity connecting the rotating groove and the oil storage groove is arranged on the output disc in the horizontal direction, and a first flow hole connecting the transmission cavity and the output end is arranged on the output disc in the vertical direction; the first flow hole is connected to the through cavity; a flow structure is arranged on the through cavity; the flow structure includes a guide component that movably passes through the through cavity and is respectively connected to the rotating groove and the oil storage groove at both ends, and also includes a flow component that moves along the guide component; the flow component has an internal oil storage space and an external dredging structure, which moves with the rotation of the output disc. On the one hand, the through cavity and the first flow hole are dredged by the movement, and on the other hand, the lubricating oil is driven to circulate by the movement.

[0012] Preferably, the first flow holes are arranged in pairs and are respectively located on the upper and lower cavity walls of the through cavity. The first flow hole at the upper end is connected to the transmission cavity, and the first flow hole at the lower end is connected to the output end.

[0013] Preferably, the guide assembly includes a guide rod passing through the through cavity; one end of the guide rod extends into the rotating groove and is rotatably connected to the fixed rod, and one end of the guide rod extends into the oil storage tank and is rotatably connected to the sliding rod; the circulation assembly is slidably set on the guide rod.

[0014] Preferably, a guide groove is provided in the oil storage tank; the sliding rod is slidably provided in the guide groove; a mounting hole is provided in the rotating groove; and the fixing rod is installed in the mounting hole.

[0015] Preferably, an elastic member 1 is provided in the guide groove; the elastic member 1 is located on both sides of the sliding rod.

[0016] Preferably, a second elastic member is provided on the guide 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 guide rod; an oil storage cylinder is arranged on the outside of the sliding sleeve; a rotatable adjustment sleeve is arranged on the outside of the oil storage cylinder, and adsorption plates connected to the oil storage cylinder are respectively arranged at both ends of the adjustment sleeve; two pairs of guide rods are provided with adsorption parts that correspond one-to-one with the adsorption plates; and the second elastic part is located between the adsorption part and the adsorption plate on the same side.

[0018] Preferably, a driving structure and a lubricating oil extraction pump are provided at both ends of the oil storage cylinder, and an oil storage chamber is provided inside the oil storage cylinder; a second flow hole connected to the oil storage chamber is provided on the side wall of the oil storage cylinder; the oil storage chamber is the oil storage space, which is connected to the lubricating oil extraction pump; the adjusting sleeve is driven by the driving structure and is rotated to connect to the oil storage cylinder, and the adjusting sleeve is provided with adjusting holes corresponding one to one to the second flow holes.

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

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

[0021] Compared to the prior art, the present invention offers the following beneficial technical advantages: a circulation structure operating within the through-cavity between the rotating trough and the oil reservoir. The rotation of the output disc generates centrifugal force, driving the guide rod to rotate. The sliding sleeve slides along the guide rod, clearing the through-cavity and the first circulation hole during sliding. The adjustment sleeve rotates, interlacing the connection between the second circulation hole and the adjustment hole. A lubricating oil pump controls the flow of lubricating oil into and out of the oil reservoir, promoting lubricating oil circulation. The adjustment sleeve is driven by electromagnets that attract the metal disc. The direction and trajectory of the sliding rod are controlled by varying the direction and speed of the output disc. Ultimately, the movement and rotation of the circulation assembly within the through-cavity coordinates the flow of lubricating oil into and out of the oil reservoir, flexibly controlling the clearing range and intensity. This combined flow and circulation effectively promotes the flow of lubricating oil between the rotating trough, the oil reservoir, the through-cavity, the first circulation hole, and the transmission cavity. The flow of lubricating oil not only reduces wear between the various components but also facilitates heat dissipation, extending the service life of the RV reducer and thus maintaining and safeguarding the performance of the electric vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0025] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0026] Figure 5 for Figure 3 Cross-sectional view at point A;

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

[0028] Figure 7 is a cross-sectional view of the circulation structure of the present invention;

[0029] Figure 8 for Figure 7 Enlarged view of point B in the middle;

[0030] Figure 9 It is a cross-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 disk; 501, through cavity; 502, first flow hole; 503, oil storage tank; 504, guide groove; 6, crankshaft; 7, rotation groove; 8, flow structure; 801, guide assembly; 80101, fixed rod; 80102, sliding rod; 80103, adsorption member; 80104, rotating sleeve; 80105, guide Directional rod; 802, circulation component; 80201, adsorption plate; 80202, adjustment sleeve; 80203, oil storage cylinder; 80204, sliding sleeve; 80205, lubricating oil extraction pump; 80206, driving structure; 80207, second circulation hole; 80208, adjustment hole; 80209, sliding bar; 80210, oil storage chamber; 80211, cleaning bar; 803, elastic part 2; 804, elastic part 1. DETAILED DESCRIPTION

[0032] Example 1, as Figure 1-Figure 3 As shown, an RV reducer proposed in the present invention includes a housing 1; an output disc 5 is rotatably arranged on the output end 4 of the housing 1, a rotation groove 7 for installing the transmission shaft 3 and the crank shaft 6 is arranged in the center, a circle of oil storage grooves 503 is arranged on the outer periphery of the output disc 5, a through cavity 501 connecting the rotation groove 7 and the oil storage groove 503 is arranged on the output disc 5 in the horizontal direction, and a first flow hole 502 connecting the transmission cavity and the output end 4 is arranged on the output disc 5 in the vertical direction; the first flow hole 502 is connected to the through cavity 501; and a flow structure 8 is arranged on the through cavity 501.

[0033] like Figure 4-Figure 5 As shown, the circulation structure 8 includes a guide component 801 that moves through the through cavity 501 and is connected to the rotating groove 7 and the oil storage tank 503 at both ends, and also includes a circulation component 802 that moves along the guide component 801; the circulation component 802 has a built-in oil storage space and an external dredging structure, which moves with the rotation of the output disk 5. On the one hand, it dredges the through cavity 501 and the first circulation hole 502 through movement, and on the other hand, it drives the circulation of lubricating oil through movement.

[0034] In a further embodiment, the first flow holes 502 are arranged in pairs, respectively located on the upper and lower walls of the through cavity 501 , the upper first flow hole 502 is connected to the transmission cavity, and the lower first flow hole 502 is connected to the output end 4 .

[0035] The transmission cavity and the output end 4 are connected through the first flow hole 502, and the rotating groove 7 and the oil storage tank 503 are connected through the cavity 501, so that a lubricating oil passage is formed inside and outside the shell 1, which facilitates the large-scale circulation of lubricating oil during the operation of the RV reducer and ensures the lubrication effect.

[0036] like Figure 6-Figure 7 As shown, the guide assembly 801 includes a guide rod 80105 that passes 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. Another end of the guide rod 80105 extends into the oil reservoir 503 and is rotatably connected to the sliding rod 80102. The circulation assembly 802 is slidably mounted on the guide rod 80105. When the output disk 5 begins to rotate, the corresponding centrifugal force is generated, causing the circulation assembly 802 to slide along the guide rod 80105. This sliding process clears the through-cavity 501 and the first circulation hole 502, and also promotes the circulation of lubricating oil.

[0037] 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 provided in the rotating groove 7; and the fixing rod 80101 is installed in the mounting hole.

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

[0039] In a further embodiment, both the sliding rod 80102 and the fixed rod 80101 are provided with a rotating sleeve 80104 connected to the guide rod 80105.

[0040] The output disk 5 rotates in one direction, and the sliding rod 80102 rotates in the opposite direction along the guide groove 504. The circulation component 802 slides along the rotating guide rod 80105, thereby achieving wide-range dredging.

[0041] An elastic member 804 is disposed in the guide groove 504 ; the elastic member 804 is located on both sides of the sliding rod 80102 .

[0042] In a further embodiment, the elastic member 804 is arranged along the arc-shaped guide groove 504 and is configured as a corrugated metal spring.

[0043] When the output disk 5 rotates in one direction, the sliding rod 80102 compresses / stretches the elastic member 1 804 along the guide groove 504. When the speed or direction of the output disk 5 changes, the centrifugal force changes, and the sliding rod 80102 is displaced by the elastic member 1 804, thereby driving the circulation assembly 802 to achieve its dredging effect.

[0044] A second elastic member 803 is provided on the guide 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 configured as a spring.

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

[0047] like Figure 8-Figure 9 As shown, the circulation component 802 includes a sliding sleeve 80204 slidably set on the guide rod 80105; an oil storage cylinder 80203 is set on the outside of the sliding sleeve 80204; a rotatable adjustment sleeve 80202 is set on the outside of the oil storage cylinder 80203, and adsorption plates 80201 connected to the oil storage cylinder 80203 are respectively set at both ends of the adjustment sleeve 80202; two pairs of guide rods 80105 are provided with adsorption parts 80103 corresponding to the adsorption plates 80201 one by one; the second elastic part 803 is located between the adsorption part 80103 and the adsorption plate 80201 on the same side.

[0048] In a further embodiment, the adsorption member 80103 is configured as an electromagnet, and the adsorption disk 80201 is configured as a metal disk. By energizing the electromagnet, the metal disk is attracted to counteract centrifugal force, thereby controlling the movement of the flow assembly 802. The combined effects of magnetic attraction and centrifugal force promote the flexible flow of the flow assembly 802.

[0049] A driving structure 80206 and a lubricating oil extraction pump 80205 are provided at both ends of the oil storage cylinder 80203, and an oil storage chamber 80210 is provided inside the oil storage cylinder 80203; a second flow hole 80207 connected to the oil storage chamber 80210 is provided on the side wall of the oil storage cylinder 80203; the oil storage chamber 80210 is the oil storage space, which is connected to the lubricating oil extraction pump 80205; the adjusting sleeve 80202 is driven by the driving structure 80206 and is rotated to connect to the oil storage cylinder 80203, and the adjusting sleeve 80202 is provided with adjusting holes 80208 corresponding one-to-one to the second flow holes 80207.

[0050] In a further embodiment, the driving structure 80206 includes a gear ring arranged along the sleeve opening of the adjustment sleeve 80202; the gear is driven by the motor to rotate on the oil storage cylinder 80203 and engages with the gear ring.

[0051] The adjustment sleeve 80202 is driven by the gears and ring gears in the drive structure 80206 to rotate outside the oil reservoir 80203. The rotation of the adjustment sleeve 80202 enables the second flow hole 80207 and the adjustment hole 80208 to be connected and interlaced. The second flow hole 80207 and the adjustment hole 80208 are connected, and the lubricating oil pump 80205 can control the flow of lubricating oil in and out of the oil reservoir 80210, thereby controlling the flow of lubricating oil. The rotation of the adjustment sleeve 80202 can clear the through cavity 501 and remove any dirt that may be present on the second flow hole 80207 and the adjustment hole 80208, thereby preventing blockage. Furthermore, by changing the size of the connecting space, the pressure of the lubricating oil in and out can be adjusted, thereby increasing the fluidity of the lubricating oil.

[0052] A cleaning strip 80211 is provided on the adjustment sleeve 80202; the cleaning strip 80211 is a dredging structure.

[0053] In a further embodiment, multiple groups of cleaning strips 80211 are spaced apart along the sidewall of the adjustment sleeve 80202, and the adjustment holes 80208 are disposed between adjacent cleaning strips 80211. When the adjustment sleeve 80202 moves and rotates, the cleaning strips 80211 clear and clean the through cavity 501 and the first flow hole 502.

[0054] A slide rail is provided on the guide rod 80105; a slide bar 80209 cooperating with the slide rail is provided on the slide sleeve 80204; through the cooperation between the slide rail and the slide bar 80209, the oil storage cylinder 80203 always moves horizontally along the guide rod 80105, and the movement trajectory can also be kept stable when the adjustment sleeve 80202 rotates.

[0055] Example 2. Based on the RV reducer of Example 1, this example provides a method for reducing lubrication losses in an RV reducer. The steps are as follows: A driving motor rotates the transmission shaft 3 through the input end 2, which then rotates the output disc 5 after reduced speed transmission via the crankshaft 6. The rotation of the output disc 5 drives the sliding rod 80102 to squeeze / stretch the elastic member 1 804 along the guide groove 504. Simultaneously, the sliding sleeve 80204, under the action of centrifugal force, squeezes / stretches the elastic member 2 803 along the guide rod 80105. During this process, the sliding sleeve 80204 moves and rotates, clearing the through-hole 501. Then, driven by the gears and ring gear in the drive mechanism 80206, the adjustment sleeve 80202 rotates outside the oil reservoir 80203. The adjustment sleeve 80202 then rotates, interlacing the connection between the second flow hole 80207 and the adjustment hole 80208. A lubricating oil extraction pump 80205 controls the flow of lubricating oil into and out of the oil reservoir 80210, promoting lubricating oil circulation. The rotation of the adjustment sleeve 80202 not only clears the through-hole 501 but also removes any dirt that may be present in the second flow hole 80207 and the adjustment hole 80208, preventing blockage. By varying the size of the connecting space, the pressure of the lubricating oil entering and exiting the through-hole can be adjusted, thereby enhancing the fluidity of the lubricating oil. To adjust the range and direction of movement, the electromagnet can be energized, causing the metal disk to move the adjustment sleeve 80202 to counteract centrifugal force. Centrifugal force can be adjusted by varying the direction and speed of the output disk 5, thereby controlling the direction and trajectory of movement of the sliding rod 80102. Ultimately, the movement and rotation of the circulation assembly 802 within the through-hole 501 coordinates the flow of lubricating oil into and out of the oil storage chamber 80210, effectively promoting the efficient flow of lubricating oil between the rotating groove 7, the oil storage tank 503, the through-hole 501, the first flow hole 502, and the transmission chamber. The flow of lubricating oil not only reduces wear between the various components but also facilitates heat dissipation, extending the service life of the RV reducer and maintaining and safeguarding the performance of the electric vehicle.

[0056] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit 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, and is characterized in that: An oil storage tank (503) is provided around the outer periphery of the output disk (5); a through cavity (501) communicating with the rotation groove (7) and the oil storage tank (503) is provided on the output disk (5) in a horizontal direction; a first flow hole (502) communicating with the transmission cavity and the output end (4) is provided on the output disk (5) in a vertical direction; the first flow hole (502) is communicated with the through cavity (501); and a flow structure (8) is provided on the through cavity (501); The circulation structure (8) includes a guide assembly (801) that moves through the through cavity (501) and is connected to the rotating groove (7) and the oil storage groove (503) at both ends, and also includes a circulation assembly (802) that moves along the guide assembly (801); the circulation assembly (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 first circulation hole (502) are dredged by the movement, and on the other hand, the movement drives the circulation of lubricating oil; 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); A second elastic member (803) is provided on the guide rod (80105); the second elastic member (803) is located on both sides of the circulation component (802); The circulation component (802) includes a sliding sleeve (80204) slidably arranged on the 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 discs (80201) connected to the oil storage cylinder (80203) are respectively arranged at both ends of the adjustment sleeve (80202); two pairs of adsorption members (80103) corresponding to the adsorption discs (80201) are arranged on the guide rod (80105); the second elastic member (803) is located between the adsorption member (80103) and the adsorption disc (80201) on the same side; A driving structure (80206) and a lubricating oil extraction pump (80205) are provided at both ends of the oil storage cylinder (80203); an oil storage chamber (80210) is provided inside the oil storage cylinder (80203); a second flow hole (80207) communicating with the oil storage chamber (80210) is provided 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 extraction pump (80205); the adjusting sleeve (80202) is driven by the driving structure (80206) to rotate and connect to the oil storage cylinder (80203); and the adjusting sleeve (80202) is provided with adjusting holes (80208) corresponding one-to-one to the second flow holes (80207).

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

3. The RV reducer according to claim 1, 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 provided in the rotating groove (7); and the fixing rod (80101) is installed in the mounting hole.

4. The RV reducer according to claim 3, characterized in that: An elastic member 1 (804) is provided in the guide groove (504); the elastic member 1 (804) is located on both sides of the sliding rod (80102).

5. The RV reducer according to claim 1, characterized in that: A cleaning strip (80211) is provided on the regulating sleeve (80202); the cleaning strip (80211) is a dredging structure.

6. The RV reducer according to claim 1, characterized in that: A slide rail is provided on the guide rod (80105); and a slide bar (80209) that cooperates with the slide rail is provided on the slide sleeve (80204).

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