Novel RV speed reducer

Abstract

The utility model discloses a novel RV speed reducer which comprises an input shaft, a planetary speed reduction assembly, a cycloid speed reduction assembly and an output disc, the input shaft is connected with the planetary speed reduction assembly, the planetary speed reduction assembly is connected with the cycloid speed reduction assembly, the planetary speed reduction assembly and the cycloid speed reduction assembly are respectively connected with the output disc, and an inner gear ring is arranged on the output disc. A crankshaft and a planet wheel are arranged on the planetary speed reduction assembly, the crankshaft is connected with the planet wheel, a sun wheel is arranged on the input shaft, the sun wheel is meshed with the planet wheel, the crankshaft is connected with the cycloid speed reduction assembly, a fixing component is arranged on the input shaft, the fixing component is connected with the planet wheel, and the planet wheel is meshed with the inner gear ring. The sun gear and the planet gear are kept meshed through the fixing component, the planet gear is driven to move to be separated from the crankshaft, the planet gear is meshed with the inner gear ring of the output disc, primary transmission and secondary transmission of the RV reducer are switched back and forth, energy loss and heat generation are reduced, and equipment is more energy-saving and efficient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of speed reducer, concretely relates to a novel RV speed reducer. BACKGROUND

[0002] The main function of the speed reducer is to reduce the high rotation speed of the driver to the low rotation speed suitable for the operation of the mechanical equipment, and through the setting of the reduction ratio, the rotation speed requirement of different equipment can be met. The RV speed reducer is composed of two-stage transmission structure linkage, the first stage adopts planetary gear transmission, and the second stage adopts pendulum transmission, has the advantages of large transmission ratio, high precision, high rigidity, high durability, low vibration and the like, and is widely applied to the high-end equipment manufacturing field, such as industrial robot, high-end numerical control machine tool and AGV trolley.

[0003] In the prior art, the RV speed reducer is meshed and driven by the sun gear and the planetary gear through the input shaft of the RV speed reducer, and then the rotation of the planetary gear is transmitted to the crank shaft, the eccentric movement of the crank shaft drives the pendulum gear (RV gear) to do eccentric movement in the needle tooth shell, the rotation of the needle tooth shell drives the output disc to reduce speed, and the high reduction ratio is realized by two-stage reduction, and constant large torque is obtained; but the increase of the reduction ratio also leads to the increase of the motor loss, the high reduction ratio makes the driver run in the low-speed high-torque state, thereby increasing the energy loss and heat generation, in some cases, such as the working process of the AGV trolley, there are heavy load, light load and no load working modes, in the light load and no load mode, the AGV trolley driver is still running in the low-speed high-torque state due to the connection of the RV speed reducer, which causes the energy to do useless work and makes the energy wasted. SUMMARY

[0004] The main purpose of the utility model is to overcome the defects in the above background technology, and provide a novel RV speed reducer.

[0005] To achieve the above objectives, this utility model proposes a novel RV reducer, comprising an input shaft, a planetary reduction assembly, a oscillating pin reduction assembly, and an output disk. The input shaft is connected to the planetary reduction assembly, which is connected to the oscillating pin reduction assembly. Both the planetary reduction assembly and the oscillating pin reduction assembly are connected to the output disk. The output disk is provided with an internal gear ring. The planetary reduction assembly is provided with a crankshaft and planetary gears, and the crankshaft is connected to the planetary gears. The input shaft is provided with a sun gear, which meshes with the planetary gears. The crankshaft is connected to the oscillating pin reduction assembly. The input shaft is provided with a fixing component, which is connected to the planetary gears. The planetary gears and the internal gear ring are meshable. The device's driver pushes the input shaft, which in turn moves the sun gear and a stationary component. The stationary component maintains the meshing of the sun gear and planetary gears and simultaneously moves the planetary gears to disengage from the crankshaft. After the planetary gears disengage from the crankshaft, they mesh with the internal gear ring of the output disc, turning the RV reducer's two-stage reduction into a single-stage reduction. This lowers the reducer's reduction ratio and allows the RV reducer to switch between single-stage and two-stage transmission. When the device operates at high speed and low torque, the reducer switches to single-stage transmission, reducing energy loss and heat generation, making the device more energy-efficient and effective, while also reducing operating costs and environmental impact.

[0006] To further optimize the technical solution, the fixed component includes a fixed disk and a bearing. The fixed disk is rotatably connected to the planetary gears, and the fixed disk is rotatably connected to the input shaft via the bearings. The fixed disk pushes the planetary gears to separate from the crankshaft, causing the planetary gears to mesh with the internal gear ring, thus realizing the switching between the first and second stage transmissions of the RV reducer.

[0007] The technical solution is further optimized by including a connecting disk and a rotating disk in the output disk. The connecting disk is rotatably connected to the rotating disk and is connected to both the planetary reduction gear assembly and the oscillating needle reduction gear assembly. The internal gear ring is mounted on the rotating disk, and the fixed disk is equipped with a limiting mechanism to restrict the rotation of the rotating disk. This direct first-stage reduction output from the rotating disk avoids the additional power consumption caused by the rotation of the output disk driving the oscillating needle reduction unit during first-stage reduction operation.

[0008] To further optimize the technical solution, the limiting mechanism includes a connecting rod and a pin. The connecting rod is hinged to the fixed disk and the pin. The connecting disk has an L-shaped groove, and the rotating disk has a track groove. A limiting groove is provided on the side wall of the track groove. The pin is movably connected to the L-shaped groove and the limiting groove. When the RV reducer outputs secondary transmission, the pin enters the limiting groove, limiting the rotation of the rotating disk on the connecting disk, so that the connecting disk and the rotating disk rotate synchronously, outputting secondary transmission.

[0009] To further optimize the technical solution, the number of limiting slots is the same as the number of teeth on the internal gear ring. This facilitates the accurate insertion of the pin into the limiting slots.

[0010] To further optimize the technical solution, the planetary gears are splinedly connected to the crankshaft, and the spline groove crests of the planetary gears have the same number of teeth as the planetary gears. This facilitates the planetary gears' disengagement from or mounting onto the crankshaft.

[0011] To further optimize the technical solution, the distance from the internal gear ring to the planetary gears is greater than the spline length of the planetary gears. This prevents the planetary gears from remaining connected to the crankshaft while meshing with the internal gear ring, thus avoiding lock-up of the reducer and its inability to operate.

[0012] To further optimize the technical solution, washers are provided on the planetary gears. This prevents the fixed disk from contacting the surface of the planetary gears, thus avoiding friction between the planetary gears and the fixed disk during rotation and causing wear on the planetary gears.

[0013] To further optimize the technical solution, a pad is provided on the rotating disk. This prevents the planetary gears and sun gear from contacting the surface of the rotating disk, thus avoiding friction between the sun gear and planetary gears during rotation and causing wear on the sun gear and planetary gears.

[0014] To further optimize the technical solution, the pad is equipped with ball bearings. This helps reduce friction between the pad and the sun gear.

[0015] The beneficial effects of this utility model include: enabling the RV reducer to switch back and forth between primary and secondary transmissions. When the equipment is running at high speed and low torque, the driver switches to primary transmission, reducing energy loss and heat generation, making the equipment more energy-efficient and efficient, while reducing operating costs and environmental impact. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the internal structure of the RV reducer in an embodiment of this utility model.

[0017] Figure 2 This is an embodiment of the present utility model. Figure 1 AA sectional view.

[0018] Figure 3 This is a schematic diagram of the rotating disk structure in an embodiment of this utility model.

[0019] Figure 4 This is a schematic diagram of the fixed disk structure in an embodiment of this utility model.

[0020] Reference numerals: 1. Input shaft; 2. Planetary reduction gear assembly; 21. Crankshaft; 22. Planetary gear; 221. Washer; 23. Sun gear; 3. Pinwheel reduction gear assembly; 4. Output disc; 41. Connecting disc; 411. L-shaped groove; 42. Rotating disc; 421. Internal gear ring; 422. Track groove; 423. Restricting groove; 5. Fixed component; 51. Fixed disc; 52. Bearing; 6. Restricting mechanism; 61. Connecting rod; 62. Pin; 7. Spacer; 71. Ball bearing. Detailed Implementation

[0021] To make the technical problems, technical solutions, and beneficial effects of the embodiments of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component. Furthermore, a connection can be for both fixing and circuit connection purposes.

[0023] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] Please see Figures 1 to 4In one embodiment, an RV reducer is disclosed, comprising an input shaft 1, a planetary reduction assembly 2, a oscillating pinion reduction assembly 3, and an output disk 4. The input shaft 1 is connected to the planetary reduction assembly 2, the planetary reduction assembly 2 is connected to the oscillating pinion reduction assembly 3, and both the planetary reduction assembly 2 and the oscillating pinion reduction assembly 3 are connected to the output disk 4. The output end of the output disk 4 is on the same side as the planetary reduction assembly 2. An internal gear ring 421 is provided on the output disk 4. The planetary reduction assembly 2 includes a crankshaft 21 and planetary gears 22, which are keyed together. A sun gear 23 is provided on the input shaft 1, which meshes with the planetary gears 22. The crankshaft 21 is connected to the oscillating pinion reduction assembly 3. A fixing component 5 is mounted on the input shaft 1, and the fixing disk 51 is rotatably connected to the planetary gears 22 and the input shaft 1. The planetary gears 22 and the internal gear ring 421 are meshable. The device's driver... (Not shown in the figure) The input shaft 1 is pushed, which drives the sun gear 23 and the fixed component 5 to move. The fixed component 5 maintains the meshing of the sun gear 23 and the planet gear 22, and simultaneously drives the planet gear 22 to move away from the crankshaft 21. After the planet gear 22 disengages from the crankshaft 21, it meshes with the internal gear ring 421 of the output disc 4, making the secondary reduction of the RV reducer become the primary reduction, thus reducing the reduction ratio of the reducer. When the driver (not shown in the figure) pulls back the input shaft 1, the planet gear 22 disengages from the internal gear ring 421 and is fixedly connected to the crankshaft 21, realizing the switching between primary and secondary transmission of the RV reducer. When the driver (not shown in the figure) is running in a high-speed, low-torque state, the reducer switches to primary transmission to reduce energy loss and heat generation, making the equipment more energy-efficient and efficient, while reducing operating costs and environmental impact.

[0026] In a specific example, the fixed component includes a fixed disk 51 and a bearing 52. The input shaft 1 is provided with a shoulder, and the fixed disk 51 is rotatably connected to the shoulder of the input shaft 1 through the bearing 52. The planetary gear 22 is provided with a ring block on its side, and the ring block is provided with a through hole, which is larger than the diameter of the crankshaft 21. The ring block is provided with a groove, and the fixed disk 51 is rotatably connected in the groove. When the input shaft 1 is moved, the fixed disk 51 synchronously drives the planetary gear 22 to move and maintains the meshing of the planetary gear 22 and the sun gear 23.

[0027] In a preferred embodiment, the output disk 4 includes a connecting disk 41 and a rotating disk 42. The connecting disk 41 has an annular groove, and the rotating disk 42 is rotatably connected to the connecting disk 41 and disposed in the annular groove. The connecting disk 41 is connected to the planetary reduction assembly 2 and the oscillating needle reduction assembly 3 respectively. The connecting disk 41 has a placement groove, and the planetary reduction assemblies are all disposed in the placement groove. The internal gear ring 421 is disposed on the rotating disk 42, and the rotating disk 42 is the output end of the output disk 4. The fixed disk 51 is provided with a limiting mechanism 6 that restricts the rotation of the rotating disk 42. When the secondary transmission is output, the limiting mechanism 6 connects the rotating disk 42 and the connecting disk 41, so that the rotating disk 42 and the connecting disk 41 rotate synchronously to output the secondary transmission. When the primary transmission is output, the limiting mechanism 6 releases the restriction of the rotating disk 42, and the rotating disk 42 directly performs the primary transmission output, avoiding the output disk 4 from driving the oscillating needle reduction assembly 3 to rotate during the primary reduction operation, thus increasing the power consumption.

[0028] In a specific example, the limiting mechanism 6 includes a connecting rod 61 and a pin 62. The connecting rod 61 is hinged to the fixed disk 51, and the connecting rod 61 is hinged to the pin 62. The connecting disk 41 has an L-shaped groove 411, one opening of which communicates with the placement groove. The rotating disk 42 has a track groove 422, and the side wall of the track groove 422 has a limiting groove 423. The pin 62 is an L-shaped pin 62. One end of the pin 62 extends from the L-shaped groove 411 into the limiting groove 423, and the other end of the pin 62 extends from the other opening of the L-shaped groove 411 and is hinged to the connecting rod 61. The openings of the L-shaped groove 411 and the connecting rod 61 cooperate with the pin 62, so that the pin 62 can only move in one direction. When the fixed disk 51 is pushed out by the input shaft 1, the connecting rod 61 moves synchronously, changing from vertical to inclined. The pin 62 is pulled towards the fixed disk 51 by the connecting rod 61, and the other end of the pin 62 moves. The fixed disk 51 exits from the limiting groove 423 and enters the track groove 422, releasing the fixed connection between the rotating disk 42 and the connecting disk 41, allowing the fixed disk 51 to rotate on the connecting disk 41. When the fixed disk 51 is moved by the retraction of the input shaft 1, the connecting rod 61 moves synchronously, changing from an inclined position to an inclined vertical position. The pin 62 is pushed by the connecting rod 61 from the track groove 422 into the limiting groove 423, limiting the rotation of the fixed disk 51 on the connecting disk 41. Through the cooperation of the pin 62 and the limiting groove 423, when the RV reducer outputs the secondary transmission, the pin 62 enters the limiting groove 423, limiting the rotation of the rotating disk 42 on the connecting disk 41, so that the connecting disk 41 and the rotating disk 42 rotate synchronously, outputting the secondary transmission. When the RV reducer outputs the primary transmission, the pin 62 enters the track groove 422. When the rotating disk 42 rotates, the rotation of the track groove 422 and the pin 62 do not interfere with each other, and the primary transmission output is directly performed by the rotating disk 42.

[0029] In a preferred embodiment, the number of limiting grooves 423 is the same as the number of teeth of the internal gear ring 421. During the first stage of deceleration, the rotating disk 42 rotates by the meshing of the planetary gear 22 and the internal gear ring 421. For every tooth rotation of the internal gear ring 421, there is a limiting groove 423 corresponding to the pin 62, which facilitates the positioning of the pin 62 and the limiting groove 423 and its insertion into the limiting groove 423.

[0030] In a preferred embodiment, the planetary gear 22 is splinedly connected to the crankshaft 21, and the peak of the spline groove of the planetary gear 22 has the same number of teeth as the planetary gear 22; this facilitates the positioning of the planetary gear 22 and the crankshaft 21, and allows the two to be reconnected.

[0031] In a preferred embodiment, the distance from the internal gear ring 421 to the planet gear 22 is greater than the spline length of the planet gear 22; when switching from a two-stage transmission to a one-stage transmission, the planet gear 22 moves and completely disengages from the crankshaft 21 before meshing with the internal gear ring 421, thus preventing the planet gear 22 from still being connected to the spline when meshing with the internal gear ring 421, which would cause the reducer to lock up and become unable to operate.

[0032] In a preferred embodiment, the planetary gear 22 is provided with a washer 221; the washer 221 separates the fixed disk 51 from the planetary gear 22, so as to avoid the fixed disk 51 from contacting the surface of the planetary gear 22, so that the planetary gear 22 will rub against the fixed disk 51 when it rotates, causing the planetary gear 22 to wear unexpectedly.

[0033] In a preferred embodiment, a pad 7 is provided on the rotating disk 42; the pad 7 abuts against the sun gear 23 to prevent the planet gears 22 and the sun gear 23 from contacting the surface of the rotating disk 42, so that the sun gear 23 and the planet gears 22 rub against the surface of the rotating disk 42 when they rotate, causing the sun gear 23 and the planet gears 22 to wear.

[0034] In a preferred embodiment, the pad 7 is provided with ball bearings 71; the ball bearings 71 replace the surface of the pad 7 in contact with the sun gear 23, thus changing the sliding friction into rolling friction, which helps to reduce the friction between the pad 7 and the sun gear 23.

[0035] Working principle: When the equipment needs to perform primary transmission, the driver (not shown) pushes the input shaft 1. The sun gear 23 on the input shaft 1 and the fixed disk 51 move synchronously. As the fixed disk 51 moves, it drives the planet gear 22 to disengage from the crankshaft 21. After disengaging from the crankshaft 21, the planet gear 22 meshes with the internal gear ring 421. One end of the connecting rod 61 moves synchronously with the fixed disk 51. The connecting rod 61 changes from vertical to inclined. The pin 62 is pulled down by the connecting rod 61 and exits from the limiting groove 423 into the track groove 422, releasing the fixation between the rotating disk 42 and the connecting disk 41. The sun gear 23 abuts against the ball 71 on the pad 7. The driver (not shown) drives the input shaft 1. When the sun gear 23, planet gear 22, and rotating disk 42 are driven to perform primary transmission output, and when switching to secondary transmission, the driver (not shown) pulls back the input shaft 1, and the fixed disk 51 moves synchronously, causing the planet gear 22 to disengage from the internal gear ring 421 and then connect to the crank shaft 21 via a spline. When the fixed disk is moved by the retraction of the input shaft 1, the connecting rod 61 moves synchronously, changing from an inclined position to an inclined vertical position, pushing the pin 62 into the limiting groove 423, limiting the rotation of the rotating disk 42 on the connecting disk 41. The driver (not shown) drives the input shaft 1 to drive the planetary reduction assembly 2 and the oscillating pin reduction assembly 3, so that the connecting disk 41 and the rotating disk 42 rotate synchronously to perform secondary transmission output.

[0036] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention and should not be construed as limiting the specific implementation of the present invention to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the concept of the present invention, and all such substitutions or modifications should be considered within the protection scope of the present invention. In the description of this specification, the reference to terms such as "an embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples. Without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations may be made herein without departing from the scope of protection of the patent application.

Claims

1. A novel RV reducer, comprising an input shaft, a planetary reduction assembly, a oscillating pin reduction assembly, and an output disk, wherein the input shaft is connected to the planetary reduction assembly, the planetary reduction assembly is connected to the oscillating pin reduction assembly, and the planetary reduction assembly and the oscillating pin reduction assembly are respectively connected to the output disk, characterized in that: The output disk is provided with an internal gear ring. The planetary reduction assembly includes a crankshaft and planetary gears. The crankshaft is connected to the planetary gears. The input shaft is provided with a sun gear, which meshes with the planetary gears. The crankshaft is connected to the oscillating pin reduction assembly. The input shaft is provided with a fixing component, which is connected to the planetary gears. The planetary gears and the internal gear ring are meshable.

2. The novel RV reducer as described in claim 1, characterized in that: The fixing component includes a fixing disk and a bearing. The fixing disk is rotatably connected to the planetary gear, and the fixing disk is rotatably connected to the input shaft through the bearing.

3. The novel RV reducer as described in claim 2, characterized in that: The output disk includes a connecting disk and a rotating disk. The connecting disk is rotatably connected to the rotating disk. The connecting disk is connected to the planetary reduction assembly and the oscillating pin reduction assembly respectively. The internal gear ring is disposed on the rotating disk. The fixed disk is provided with a limiting mechanism to restrict the rotation of the rotating disk.

4. The novel RV reducer as described in claim 3, characterized in that: The limiting mechanism includes a connecting rod and a pin. The connecting rod is hinged to the fixed plate and the pin. The connecting plate has an L-shaped groove, the rotating plate has a track groove, and the side wall of the track groove has a limiting groove. The pin is movably connected to the L-shaped groove and the limiting groove.

5. The novel RV reducer as described in claim 4, characterized in that: The number of limiting grooves is the same as the number of teeth on the internal gear ring.

6. The novel RV reducer as described in claim 1, characterized in that: The planetary gears are splinedly connected to the crankshaft, and the spline groove crests of the planetary gears have the same number of teeth as the planetary gears.

7. A novel RV reducer as described in claim 6, characterized in that: The distance from the internal gear ring to the planetary gear is greater than the spline length of the planetary gear.

8. A novel RV reducer as described in claim 1, characterized in that: The planetary gears are equipped with washers.

9. A novel RV reducer as described in claim 3, characterized in that: The rotating disk is equipped with pads.

10. A novel RV reducer as described in claim 9, characterized in that: The pad is equipped with ball bearings.

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