Two-stage planetary reduction gearbox

Abstract

The utility model provides a two-stage planetary reduction gearbox, and belongs to the technical field of reduction gearboxes. The problem that in the prior art, a planetary gear and a planetary support are inconvenient to disassemble is solved. The speed reducer comprises a speed reduction box body, a first-stage outer gear ring, a second-stage outer gear ring, a planetary support, a two-stage planetary gear set and an output shaft, a box body end cover is installed at one end of the speed reduction box body, the first-stage outer gear ring and the second-stage outer gear ring are installed inside the speed reduction box body, the second-stage outer gear ring is fixedly connected with the box body end cover, and the planetary support comprises a first support and a second support. A first connecting foot and a second connecting foot are formed on the first support and the second support respectively, a plurality of bolt holes and connecting holes are formed in the planetary support, the bolt holes penetrate through the first connecting foot and the second connecting foot, the connecting holes are located between the bolt holes, connecting rods are fixed in the connecting holes, and the two-stage planetary gear set is fixedly arranged outside the connecting rods in a sleeving mode. Ball bearings are installed at the two ends of the connecting rod and connected with the interior of a two-stage planetary gear set, and the two-stage planetary gear set is meshed with the interior of the first-stage outer gear ring and the interior of the second-stage outer gear ring respectively. The planetary support has the advantages that the planetary support is convenient to disassemble, the coaxiality of the two-stage gears is high, and the planetary support is stable in structure.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of reduction gearbox, and relates to a two-stage planetary reduction gearbox. BACKGROUND

[0002] The two-stage planetary gearbox is a mechanical device adopting two-stage planetary gear transmission, and during assembly of the two-stage planetary gearbox, the non-detachable planetary support can make installation and positioning of the planetary gear, the sun gear and the inner ring gear difficult.

[0003] The patent with the patent publication number CN212509373U discloses a planetary gear reduction gearbox, which comprises a connecting block, a first planetary gear set, a second planetary gear set, an inner ring gear and a box body. The connecting block is fixedly connected with the shell, the box body is fixedly connected with the connecting block, the inner ring gear is clamped between the connecting block and the box body, the first planetary gear set is arranged in the inner ring gear and is in transmission connection with the motor shaft, the second planetary gear set is arranged in the box body and is in transmission connection with the first planetary gear set, the first sun gear is fixed on the motor shaft and rotates synchronously with the motor shaft, a plurality of first planetary gears are installed on one side of the first planet carrier and are in meshing connection with the first sun gear, the inner teeth of the inner ring gear are in meshing connection with the plurality of first planetary gears, the second sun gear is installed on the other side of the first planet carrier and rotates synchronously with the first planet carrier, a plurality of second planetary gears are installed on one side of the second planet carrier and are in meshing connection with the second sun gear, and the inner wall of the box body is provided with inner teeth, and the plurality of second planetary gears are in meshing connection with the inner teeth on the inner wall of the box body.

[0004] In the planetary gear reduction gearbox provided by the patent, the planet carrier is an integrated planet carrier and cannot be disassembled and assembled, which can easily cause the above-mentioned problems, and the planetary gears, bearings and other components can be damaged due to wear and fatigue cracks after long-term use. If the planet support cannot be disassembled, the entire gearbox needs to be disassembled to replace these components, which increases the workload and difficulty of maintenance. UTILITY MODEL CONTENTS

[0005] The utility model aims at the above-mentioned problems existing in the prior art and provides a two-stage planetary reduction gearbox.

[0006] The utility model discloses a two -stage planetary reduction gearbox can be realized through the following technical schemes: a two -stage planetary reduction gearbox, including reduction gearbox body, primary outer gear ring, secondary outer gear ring, planetary support, two -stage planetary gear set and output shaft, the one end of reduction gearbox body is installed with the end cover of box body, the primary outer gear ring and secondary outer gear ring are installed in the inside of reduction gearbox body and are fixedly connected with the end cover of box body, the planetary support includes first support and second support, first support and second support form first connecting foot and second connecting foot respectively, a plurality of bolt holes and connecting holes are seted up on the planetary support, the bolt hole is through first connecting foot and second connecting foot, the connecting hole is located between the bolt hole, the connecting rod is fixed in the connecting hole, the two -stage planetary gear set is fixed to the outside of connecting rod, the connecting rod both ends are installed with the ball bearing, the ball bearing is connected with the inside of two -stage planetary gear set, and the inside of two -stage planetary gear set is engaged with the primary outer gear ring and secondary outer gear ring respectively.

[0007] In the two -stage planetary reduction gearbox, the ball bearing is provided with a damping washer on one side.

[0008] In the two -stage planetary reduction gearbox, the planetary support is provided with a fixing hole, and the connecting rod is fixed with a fixing bolt close to the end portion.

[0009] In the two -stage planetary reduction gearbox, the first connecting foot and the second connecting foot are provided with a clamping groove structure at the end portions, and the end portions of the first connecting foot and the second connecting foot are attached to each other.

[0010] Compared with the prior art, the two -stage planetary reduction gearbox has the following beneficial effects: 1. The first support and the second support are provided in a split structure, which facilitates the replacement and maintenance of the two -stage planetary gear set on the planetary support; 2. The connecting rod and the two -stage planetary gear set are provided on the planetary support, which ensures that the two -stage planetary gear set has strong coaxiality, reduces noise and gear wear during use, and the like; 3. The bolt hole and the fixing bolt are provided on the planetary support, which ensures the stability of the connection between the planetary support and the connecting rod. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 It is the overall structure schematic diagram of the utility model;

[0012] Fig. 2 It is the explosion structure schematic diagram of the utility model;

[0013] Fig. 3 It is the planetary support structure schematic diagram.

[0014] In the diagram: 1. Gearbox housing; 11. Housing end cover; 2. First-stage external gear ring; 3. Second-stage external gear ring; 4. Planetary support; 41. First support; 411. First connecting foot; 42. Second support; 421. Second connecting foot; 43. Bolt hole; 44. Connecting hole; 45. Connecting rod; 46. Ball bearing; 47. Shock-absorbing washer; 48. Fixing hole; 49. Fixing bolt; 5. Double-stage planetary gear set; 6. Output shaft. Detailed Implementation

[0015] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0016] like Figs. 1 to 3 As shown, this embodiment includes a reduction gearbox 1, a primary external gear ring 2, a secondary external gear ring 3, a planetary carrier 4, a double-stage planetary gear set 5, and an output shaft 6. A gearbox end cover 11 is installed at one end of the reduction gearbox 1. The secondary external gear ring 3 is fixedly connected to the gearbox end cover 11. The output shaft 6 passes through the reduction gearbox 1 and the primary external gear ring 2. The planetary carrier 4 is installed inside the space between the primary external gear ring 2 and the secondary external gear ring 3. The planetary carrier 4 includes a first support 41 and a second support 42. The first support 41 and the second support 42 respectively form a first connecting leg 411 and a second connecting leg 421. The ends of the first connecting leg 411 and the second connecting leg 421 are slotted structures, and the first connecting leg 411 and the second connecting leg 421... The ends of the planetary support 4 are fitted together. Each end of the planetary support 4 has three bolt holes 43 and three connecting holes 44. The bolt holes 43 and connecting holes 44 are arranged at intervals. The bolt holes 43 pass through the first connecting foot 411 and the second connecting foot 421. The first support 41 and the second support 42 are fixedly connected by bolts passing through the bolt holes 43. The connecting rod 45 is fixed between the two connecting holes 44. The double-stage planetary gear set 5 is sleeved and fixed to the outside of the connecting rod 45. Ball bearings 46 are installed at both ends of the connecting rod 45. The ball bearings 46 are connected to the inside of the double-stage planetary gear set 5. In this embodiment, the double-stage planetary gear set 5 meshes with the inside of the first-stage external gear ring 2 and the second-stage external gear ring 3 respectively.

[0017] To elaborate further, such as Fig. 3 As shown, the planetary support 4 has a fixing hole 48, and the connecting rod 45 is fixed with a fixing bolt 49 near both ends. The fixing bolt 49 passes through the fixing hole 48 to further fix the connecting rod 45 to the planetary support 4. The fixing bolts 49 at both ends of the connecting rod 45 are respectively connected to different first connecting feet 411 or second connecting feet 421.

[0018] To elaborate further, such as Fig. 3As shown, the bead bearing side is provided with a damping washer 47, which can effectively absorb and disperse the impact force, and protect the two-stage planetary gear set 5 of the embodiment.

[0019] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

[0020] Although various terms are used herein, the possibility of using other terms is not excluded. The use of these terms is only for the convenience of describing and explaining the essence of the present application; any additional limitation is contrary to the spirit of the present application.

Claims

1. A two-stage planetary gearbox, comprising a gearbox body (1), a first-stage external gear ring (2), a second-stage external gear ring (3), a planetary support (4), a two-stage planetary gear set (5), and an output shaft (6), wherein a gearbox end cover (11) is installed at one end of the gearbox body (1), the first-stage external gear ring (2) and the second-stage external gear ring (3) are installed inside the gearbox body (1), and the second-stage external gear ring (3) is fixedly connected to the gearbox end cover (11), characterized in that: The planetary support (4) includes a first support (41) and a second support (42). The first support (41) and the second support (42) are respectively formed with a first connecting foot (411) and a second connecting foot (421). The planetary support (4) is provided with a plurality of bolt holes (43) and connecting holes (44). The bolt holes (43) pass through the first connecting foot (411) and the second connecting foot (421). The connecting holes (44) are located between the bolt holes (43). A connecting rod (45) is fixed in the connecting hole (44). The double-stage planetary gear set (5) is sleeved and fixed outside the connecting rod (45). Ball bearings (46) are installed at both ends of the connecting rod (45). The ball bearings (46) are connected to the inside of the double-stage planetary gear set (5). The double-stage planetary gear set (5) meshes with the inside of the first-stage external gear ring (2) and the second-stage external gear ring (3).

2. The two-stage planetary gearbox according to claim 1, characterized in that: A shock-absorbing washer (47) is provided on one side of the ball bearing (46).

3. A two-stage planetary gearbox according to claim 1, characterized in that: The planetary support (4) has a fixing hole (48), and the connecting rod (45) is fixed with a fixing bolt (49) near its end. The fixing bolt (49) passes through the fixing hole (48).

4. A two-stage planetary gearbox according to claim 1, characterized in that: The ends of the first connecting foot (411) and the second connecting foot (421) are slotted structures, and the ends of the first connecting foot (411) and the second connecting foot (421) fit together.

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