A double-speed planetary reducer shift mechanism

Abstract

This invention discloses a dual-speed planetary reducer shifting mechanism, including a shifting base, hydraulic cylinder A, a flange seat, a splined sleeve, a sun gear spindle, hydraulic cylinder B, an annular gear sleeve, a housing, an external gear ring, and a planetary gear carrier. The shifting base is coaxially connected to the housing. Multiple hydraulic cylinders A and B are mounted on the end face of the shifting base facing the housing. The sun gear spindle is mounted in the central hole of the shifting base via bearings. The axes of hydraulic cylinders A and B are parallel to the axis of the sun gear spindle. Hydraulic cylinder A enables the connection and separation of the sun gear spindle and the external gear ring; hydraulic cylinder B enables the connection and separation of the external gear ring 11 from the housing. This invention has a simple structure and low manufacturing cost; moreover, this invention eliminates the need for friction plates, thus avoiding energy loss due to frictional heat generation and eliminating the need for cooling devices, greatly reducing production costs and improving transmission efficiency.

Description

Technical Field

[0001] This invention relates to a dual-speed planetary reducer, and more specifically to a dual-speed planetary reducer shifting mechanism. Background Technology

[0002] Currently, dual-speed planetary reducers all use friction plates for shifting. The principle is to use a ring cylinder to press the friction plates together for shifting. During transmission, one set of friction plates is pressed together to achieve transmission, while another set is released and idles. Each set of friction plates is composed of multiple layers of outer and inner plates stacked together. Because there is slippage between the loose friction plates, the idling and slippage itself is a form of energy loss during operation, affecting transmission efficiency. At the same time, due to the compact structure of the planetary reducer, the useless work done by the slippage of multiple friction plates will generate high temperatures, damage the seals, and thus cause damage to the reducer. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides a dual-speed planetary reducer shifting mechanism with simple structure, which can avoid energy loss caused by slippage of multiple friction plates and has high transmission efficiency.

[0004] The technical solution adopted in this invention is:

[0005] A dual-speed planetary reducer shifting mechanism includes a shifting base, hydraulic cylinders A, a flange seat, a splined sleeve, a sun gear spindle, hydraulic cylinders B, an annular gear sleeve, a housing, an external gear ring, and a planetary gear carrier. The shifting base is coaxially connected to the housing. Multiple hydraulic cylinders A and B are mounted on the end face of the shifting base facing the housing. The sun gear spindle is mounted in the center hole of the shifting base via bearings. The axes of hydraulic cylinders A and B are parallel to the axis of the sun gear spindle. The splined sleeve is fitted onto the sun gear spindle, which has splines. The flange seat is mounted on the splined sleeve via bearings. The piston rods A of the multiple hydraulic cylinders A are connected to the flange seat. The external gear ring is mounted on the sun gear spindle via bearings. The center hole of the external gear ring facing the splined sleeve has a spline groove. The piston rods A can drive the splined sleeve to move, realizing the connection and separation of the sun gear spindle and the external gear ring.

[0006] The outer teeth of the annular gear sleeve mesh with the inner teeth on the housing; the inner teeth of the annular gear sleeve can mesh with the outer teeth of the outer gear ring; the piston rod B of the hydraulic cylinder B is connected to the annular gear sleeve, which can realize the meshing and separation of the annular gear sleeve and the outer gear ring; the planet carrier is fixedly installed on the sun gear spindle, and multiple planet gears are installed on the planet carrier, which mesh with the inner teeth of the outer gear ring.

[0007] Furthermore, the plurality of hydraulic cylinders A are evenly arranged along the circumferential direction.

[0008] Furthermore, the plurality of hydraulic cylinders B are evenly arranged along the circumferential direction.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] The present invention has a simple structure and low manufacturing cost; moreover, the present invention eliminates the need for friction plates, thus eliminating energy loss caused by frictional heat generation and eliminating the need for cooling devices, which greatly reduces production costs and improves transmission efficiency. Attached Figure Description

[0011] Figure 1 This is a structural diagram of the present invention. Detailed Implementation

[0012] The present invention will now be further described with reference to the accompanying drawings.

[0013] like Figure 1 As shown, the present invention includes a shift base 1, hydraulic cylinders A3, a flange seat 4, a splined sleeve 5, a sun gear spindle 6, hydraulic cylinders B7, an annular gear sleeve 9, a housing 10, an external gear ring 11, and a planetary carrier 12. The shift base 1 is coaxially connected to the housing 10. Multiple hydraulic cylinders A3 and multiple hydraulic cylinders B7 are provided on the end face of the shift base 1 facing the housing 10. The sun gear spindle 6 is mounted in the central hole of the shift base 1 via bearings and is coaxial with the shift base 1; the sun gear spindle 6 is provided with splines. The axes of hydraulic cylinders A3 and B7 are parallel to the axis of the sun gear spindle. The multiple hydraulic cylinders A3 and B7 are evenly arranged circumferentially.

[0014] The spline sleeve 5 is fitted onto the sun gear spindle 6. The flange seat 4 is mounted on the spline sleeve 5 via bearings. The piston rods A2 of the multiple hydraulic cylinders A3 are connected to the flange seat 4. The external gear ring 11 is mounted on the sun gear spindle via bearings. The end of the external gear ring 11 with its center hole facing the spline sleeve 5 has a spline groove that can mate with the spline sleeve 5. The piston rods A2 can drive the spline sleeve 5 to move along the axis of the sun gear spindle 6 to achieve the connection and separation of the sun gear spindle 6 and the external gear ring 11. The other end of the center hole of the external gear ring 11 has internal teeth.

[0015] The outer teeth of the annular gear sleeve 9 mesh with the inner teeth on the housing 10; the inner teeth of the annular gear sleeve 9 can mesh with the outer teeth of the outer gear ring 11. The piston rod B8 of the hydraulic cylinder B7 is connected to the annular gear sleeve 9, enabling the engagement and disengagement of the annular gear sleeve and the outer gear ring. The planet carrier 12 is fixedly mounted on the sun gear spindle 6, and multiple planet gears are mounted on the planet carrier, which mesh with the inner teeth of the outer gear ring 11.

[0016] The piston rod B8 of cylinder B7 engages the annular gear sleeve 9 with the outer teeth of the outer gear ring 11, which is fixed to the housing 10 by the annular gear sleeve. The transmission route is as follows: the sun gear spindle 6 drives the planetary gears in the planetary gear carrier 12, which in turn drives the planetary carrier 12 to the next stage. When cylinder B7 pushes the piston rod B8 upward, the annular gear sleeve 9 disengages from the outer gear ring 11, and the outer gear ring 11 can rotate. Simultaneously, cylinder A3 pushes the piston A2 downward, causing the spline groove on the inner wall of the spline sleeve 5 to engage with the spline on the sun gear spindle 6, and the spline on the outer wall of the spline sleeve 5 to engage with the spline groove of the outer gear ring 11. The sun gear spindle 6 and the outer gear ring 11 are relatively fixed, causing the planetary gears to rotate together, while the planetary gears do not rotate on their own. Gear shifting is achieved solely by the actions of cylinders A and B7, eliminating the need for friction plates and avoiding energy loss caused by slippage of multiple friction plates, resulting in high transmission efficiency.

Claims

1. A shifting mechanism for a dual-speed planetary reducer, characterized in that: The system includes a shift base, hydraulic cylinder A, a flange seat, a splined sleeve, a sun gear spindle, hydraulic cylinder B, an annular gear sleeve, a housing, an external gear ring, and a planetary carrier. The shift base is coaxially connected to the housing. Multiple hydraulic cylinders A and B are mounted on the end face of the shift base facing the housing. The sun gear spindle is mounted in the center hole of the shift base via bearings. The axes of hydraulic cylinders A and B are parallel to the axis of the sun gear spindle. The splined sleeve is fitted onto the sun gear spindle, which has splines. The flange seat is mounted on the splined sleeve via bearings. The piston rods A of the multiple hydraulic cylinders A are connected to the flange seat. The external gear ring is mounted on the sun gear spindle via bearings. The center hole of the external gear ring facing the splined sleeve has a spline groove. The piston rods A can drive the splined sleeve to move, realizing the connection and separation of the sun gear spindle and the external gear ring. The outer teeth of the annular gear sleeve mesh with the inner teeth on the housing; the inner teeth of the annular gear sleeve can mesh with the outer teeth of the outer gear ring; the piston rod B of the oil cylinder B is connected to the annular gear sleeve, which can realize the meshing and separation of the annular gear sleeve and the outer gear ring. The planet carrier is fixedly mounted on the sun gear spindle, and multiple planet gears are mounted on the planet carrier. The planet gears mesh with the internal teeth of the external gear ring.

2. The dual-speed planetary reducer shifting mechanism according to claim 1, characterized in that: The multiple hydraulic cylinders A are evenly arranged along the circumference.

3. The dual-speed planetary reducer shifting mechanism according to claim 1, characterized in that: The multiple hydraulic cylinders B are evenly arranged along the circumference.

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