Axial limiting device of planetary transmission floating mechanism

Abstract

The utility model discloses an axial limiting device of a planetary transmission floating mechanism. The axial limiting device comprises a secondary planet carrier, an active spring, a thrust self-aligning roller bearing, a first check ring, a gear, a clamping ring, an angular contact ball bearing, a second check ring, a primary planet carrier and a third check ring. The gear is assembled on a main shaft of the speed reducer in a clearance mode, the second-stage planet carrier is fixedly connected to the machine frame and installed on the main shaft, and the first-stage planet carrier is connected with a spline at the right end of the gear. The part, located on the left side of the gear, of the second-stage planet carrier is provided with two stages of stepped inner holes, the stepped inner holes comprise a first first-stage hole and a first second-stage hole, the hole diameters of the first first-stage hole and the first second-stage hole are increased from left to right, and the active spring is assembled at the left end of the first first-stage hole of the second-stage planet carrier. The angular contact ball bearing is assembled on the primary planet carrier in an interference manner; a clamping groove is formed in the portion, located on the left side of the angular contact ball bearing, of the first-stage planet carrier, and the clamping ring is clamped into the clamping groove. According to the utility model, the axial movement of the gear is effectively controlled, so that the fault problem caused by the axial displacement of the gear is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical field relates to a planetary transmission floating mechanism axial position limiting device. BACKGROUND

[0002] Gear is the core transmission component in the reducer, determines the efficiency and stability of the whole transmission system. The axial displacement of the gear directly affects the meshing state in the running process. Reasonable gear axial limit is an important means to ensure the stable operation of the reducer, prolong the service life of the equipment and reduce the failure rate. The axial movement of the gear shaft is physically constrained by a specific limiting device. Common limiting devices include axial blocking ring, snap ring, limiting ring, bearing and spring. The common goal of these devices is to ensure that the gear remains in the designed position during operation, thereby avoiding a series of failure problems caused by axial displacement of the gear, including uneven load, meshing gap change, bearing wear and cracking, abnormal noise, transmission efficiency decline, and even failure of the whole transmission system. This not only affects the normal operation of the equipment, but also increases the maintenance cost and shortens the service life of the equipment. SUMMARY

[0003] The utility model aims at providing a planetary transmission floating mechanism axial position limiting device to effectively control the axial movement of the gear and avoid failure problems caused by axial displacement of the gear.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme to solve it:

[0005] The present application provides a planetary transmission floating mechanism axial position limiting device, comprising a two-stage carrier, an active spring, a thrust aligning roller bearing, a first blocking ring, a gear, a snap ring, an angular contact ball bearing, a second blocking ring, a primary carrier and a third blocking ring. The gear gap is assembled on the main shaft of the reducer, the two-stage carrier is fixedly connected to the rack and installed on the main shaft, and the primary carrier is connected to the right end of the gear through the spline. The left side of the primary carrier has a smaller shaft diameter than the hole diameter of the two-stage carrier located on the right side of the gear.

[0006] The part of the two-stage carrier located on the left side of the gear is provided with a two-stage stepped hole, and the first one-stage hole and the first two-stage hole with increasing hole diameter from left to right. The active spring is assembled at the left end of the first one-stage hole of the two-stage carrier, and the extension direction of the active spring is the axial direction of the main shaft. The first blocking ring is assembled in the first two-stage hole of the two-stage carrier and is fixedly connected to the two-stage carrier. The inner hole diameter of the first blocking ring is smaller than the hole diameter of the first one-stage hole. The thrust aligning roller bearing is interference fitted in the first one-stage hole of the two-stage carrier. The active spring and the first blocking ring respectively limit the axial direction of the thrust aligning roller bearing from left and right ends, and the left side of the gear is in contact with the thrust aligning roller bearing.

[0007] The angular contact ball bearing is interference fitted on the primary planetary carrier; a clamping groove is formed on the left side of the primary planetary carrier, and a clamping ring is clamped into the clamping groove; the right side of the secondary planetary carrier is provided with two stepped bores, and the bore diameter of the second primary bore and the second secondary bore increases from left to right; the outer ring of the angular contact ball bearing is interference fitted into the second primary bore of the secondary planetary carrier, and the width of the second primary bore is greater than twice the maximum width of the angular contact ball bearing; the second retainer is fitted into the second secondary bore, and the bore diameter of the second retainer is smaller than the outer diameter of the angular contact ball bearing; the right end surface of the inner ring of the angular contact ball bearing is in contact with the left end surface of the step provided on the primary planetary carrier, and the distance between the right end of the clamping ring and the left end of the step of the primary planetary carrier is greater than twice the maximum width of the angular contact ball bearing; the second retainer is arranged on the secondary planetary carrier at the right end of the angular contact ball bearing and is fixed to the secondary planetary carrier; the clamping ring and the second retainer are respectively arranged at the left and right ends of the angular contact ball bearing to axially limit the angular contact ball bearing.

[0008] The right end of the primary planetary carrier is provided with an inner bore, the third retainer is arranged in the inner bore of the primary planetary carrier and is fixed to the primary planetary carrier, the bore diameter of the third retainer is smaller than the large diameter of the right side spline of the gear, a stepped bore is arranged on the left side of the third retainer to avoid collision with the spline of the primary planetary carrier, and the bore diameter of the stepped bore on the left side of the third retainer is greater than the large diameter of the spline of the primary planetary carrier.

[0009] Further, the first retainer is fixed to the secondary planetary carrier through a first bolt.

[0010] Further, the second retainer is fixed to the secondary planetary carrier through a second bolt.

[0011] Further, the third retainer is fixed to the primary planetary carrier through a third bolt.

[0012] Compared with the prior art, the utility model has the following technical effects:

[0013] The utility model can effectively control the axial movement of the gear, ensure that the gear always remains in the best meshing position, thereby reducing the failure rate of the transmission system, prolonging the service life thereof, ensuring the stable and reliable operation of the equipment, improving the overall performance of the mechanical equipment, reducing the operation and maintenance cost thereof, and providing strong guarantee for production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is the structural schematic diagram of the axial limiting device of the planetary transmission floating mechanism of the utility model;

[0015] The meanings of the numbers in the figure are as follows: 1. main shaft, 2. secondary planetary carrier, 3. active spring, 4. thrust aligning roller bearing, 5. first bolt, 6. first retainer, 7. gear, 8. clamping ring, 9. second bolt, 10. angular contact ball bearing, 11. second retainer, 12. primary planetary carrier, 13. third bolt, 14. third retainer.

[0016] The utility model is further explained in the following in combination with the drawings and specific embodiments. DETAILED DESCRIPTION

[0017] As Figure 1 shown, the axial limiting device of the planetary transmission floating mechanism provided by the utility model, including two-stage planet carrier 2, active spring 3, thrust aligning roller bearing 4, first check ring 6, gear 7, snap ring 8, angular contact ball bearing 10, second check ring 11, primary planet carrier 12 and third check ring 14, wherein gear 7 gap assembly is on the main shaft 1 of the speed reducer, two-stage planet carrier 2 is fixedly connected on the frame and installed on the main shaft 1, primary planet carrier 12 is connected with the right end spline of gear (7), and the left side part of primary planet carrier 12 is smaller than the hole diameter of two-stage planet carrier (2) on the right side of the matching tooth.

[0018] The part of two-stage planet carrier 2 on the left side of gear 7 is provided with two-stage stepped inner hole, and the first primary hole and the first secondary hole with the hole diameter increasing from left to right, active spring 3 is assembled in the left end of the first primary hole of two-stage planet carrier 2, and the telescopic direction of active spring 3 is the axial direction of main shaft 1, first check ring 6 is assembled in the first secondary hole of two-stage planet carrier 2 and is fixedly connected with two-stage planet carrier 2, and the inner hole diameter of first check ring 6 is smaller than the hole diameter of the first primary hole, thrust aligning roller bearing 4 is interference assembled in the first primary hole of two-stage planet carrier 2, thrust aligning roller bearing 4 is fixed in the first primary hole of two-stage planet carrier 2 through active spring 3 and first check ring 6, and the left side of gear 7 is attached to thrust aligning roller bearing 4.

[0019] Angular contact ball bearing 10 is interference assembled on primary planet carrier 12, a clamping groove is formed on the part of primary planet carrier 12 on the left side of angular contact ball bearing 10, snap ring 8 is clamped into the clamping groove, due to the machining error, there is a small gap axial floating between snap ring 8 and angular contact ball bearing 10, the part of two-stage planet carrier 2 on the right side of the matching tooth is provided with two-stage stepped inner hole, and the second primary hole and the second secondary hole with the hole diameter increasing from left to right, the outer ring of angular contact ball bearing 10 is interference assembled in the second primary hole of two-stage planet carrier 2, the width of the second primary hole is greater than twice the maximum width of angular contact ball bearing 10, second check ring 11 is assembled in the second secondary hole, and the hole diameter is smaller than the outer diameter of angular contact ball bearing 10, the right end face of the inner ring of angular contact ball bearing 10 is attached to the left end face of the step arranged on primary planet carrier 12, and the distance between the right end of snap ring 8 and the left end face of the step on primary planet carrier 12 is greater than twice the maximum width of angular contact ball bearing 10, second check ring 11 is arranged on two-stage planet carrier 2 on the right end of angular contact ball bearing 10 and is fixedly connected with two-stage planet carrier 2, and snap ring 8 and second check ring 11 respectively limit the axial direction of angular contact ball bearing 10 from the left and right ends,

[0020] The right end of the primary planet carrier 12 is provided with an inner hole, and the third check ring 14 is arranged in the inner hole of the primary planet carrier 12 and is fixedly connected with the primary planet carrier 12, the hole diameter of the third check ring 14 is smaller than the large diameter of the right side spline of the gear 7, the left side of the third check ring 14 is provided with a stepped hole, so as to avoid collision with the spline of the primary planet carrier 12, and the hole diameter of the left side stepped hole of the third check ring 14 is larger than the large diameter of the spline of the primary planet carrier 12.

[0021] The working principle of the utility model is as follows:

[0022] (1) The secondary planet carrier 2 is fixedly connected with the rack through bolts. The left side of the main shaft 1 is connected with the motor through the spline, and the right side is connected with the primary planet carrier 12 through the spline.

[0023] (2) The main shaft 1 transmits the motor torque to the primary planet carrier 12 through the spline and the primary planet gear, and the primary planet carrier 12 transmits the torque to the gear 7 through the spline, and the gear 7 is engaged with the matching teeth to realize torque transmission.

[0024] (3) The active spring 3 limits the leftward movement of the thrust self-aligning roller bearing 4, and the first check ring 6 limits the rightward movement of the thrust self-aligning roller bearing 4, so as to realize the axial positioning of the thrust self-aligning roller bearing 4 and avoid bearing loosening failure.

[0025] (4) The snap ring 8 and the primary planet carrier 12 realize the axial positioning of the inner ring of the angular contact ball bearing 10, and the secondary planet carrier 2 and the second check ring 11 realize the axial positioning of the outer ring of the angular contact ball bearing 10.

[0026] (5) The left side of the gear 7 is in close contact with the thrust self-aligning roller bearing 4, and the right side is engaged with the primary planet carrier 12 through the spline, the right side axial movement is limited by the third check ring 14, and a certain axial allowance is left to realize the radial floating and axial positioning of the gear 7.

[0027] Preferably, the first check ring 6 is fixedly connected with the secondary planet carrier 2 through the first bolt 5. The bolt connection is stable and easy to disassemble.

[0028] Preferably, the second check ring 11 is fixedly connected with the secondary planet carrier 2 through the second bolt 9.

[0029] Preferably, the third check ring 14 is fixedly connected with the primary planet carrier 12 through the third bolt 13.

Claims

1. An axial limiting device for a planetary transmission floating mechanism, characterized by, The application relates to a reducer, which comprises a secondary planetary carrier (2), an active spring (3), a thrust aligning roller bearing (4), a first retaining ring (6), a gear (7), a snap ring (8), an angular contact ball bearing (10), a second retaining ring (11), a primary planetary carrier (12) and a third retaining ring (14); wherein the gear (7) is gap assembled on a main shaft (1) of the reducer, the secondary planetary carrier (2) is fixedly connected to a rack and mounted on the main shaft (1), and the primary planetary carrier (12) is connected with a right end spline of the gear (7); the left side of the primary planetary carrier (12) is smaller in shaft diameter than the hole diameter of the secondary planetary carrier (2) located on the right side of the matching teeth; The left side of the secondary planetary carrier (2) is provided with two-stage stepped inner holes, and the first primary hole and the first secondary hole are sequentially arranged from left to right and gradually increased in hole diameter; the active spring (3) is assembled at the left end of the first primary hole of the secondary planetary carrier (2), and the stretching direction of the active spring (3) is the axial direction of the main shaft (1); the first retaining ring (6) is assembled in the first secondary hole of the secondary planetary carrier (2) and fixedly connected with the secondary planetary carrier (2), and the inner hole diameter of the first retaining ring (6) is smaller than the hole diameter of the first primary hole; the thrust aligning roller bearing (4) is interference assembled in the first primary hole of the secondary planetary carrier (2), and the active spring (3) and the first retaining ring (6) are respectively arranged at the left and right ends of the thrust aligning roller bearing (4) and axially limit the thrust aligning roller bearing (4); the left side of the gear (7) is in contact with the thrust aligning roller bearing (4); The angular contact ball bearing (10) is interference assembled on the primary planetary carrier (12); the part, located on the left side of the angular contact ball bearing (10), of the primary planetary carrier (12) is provided with a clamping groove, and the snap ring (8) is clamped in the clamping groove; the part, located on the right side of the matching teeth, of the secondary planetary carrier (2) is provided with two-stage stepped inner holes, and the second primary hole and the second secondary hole are sequentially arranged from left to right and gradually increased in hole diameter; the outer ring of the angular contact ball bearing (10) is interference assembled in the second primary hole of the secondary planetary carrier (2), the width of the second primary hole is greater than twice the maximum width of the angular contact ball bearing (10), and the second retaining ring (11) is assembled in the second secondary hole and smaller in hole diameter than the outer diameter of the angular contact ball bearing (10); the right end surface of the inner ring of the angular contact ball bearing (10) is in contact with the left end surface of the step arranged on the primary planetary carrier (12), the distance between the right end of the snap ring (8) and the left end surface of the step of the primary planetary carrier (12) is greater than twice the maximum width of the angular contact ball bearing (10), the second retaining ring (11) is arranged on the secondary planetary carrier (2) at the right end of the angular contact ball bearing (10) and fixedly connected with the secondary planetary carrier (2), and the snap ring (8) and the second retaining ring (11) are respectively arranged at the left and right ends of the angular contact ball bearing (10) and axially limit the angular contact ball bearing (10); The right end of the primary planetary carrier (12) is provided with an inner hole, the third retaining ring (14) is arranged in the inner hole of the primary planetary carrier (12) and fixedly connected with the primary planetary carrier (12), the hole diameter of the third retaining ring (14) is smaller than the large diameter of the right side spline of the gear (7), the left side of the third retaining ring (14) is provided with a stepped hole to avoid collision with the spline of the primary planetary carrier (12), and the hole diameter of the left side stepped hole of the third retaining ring (14) is greater than the large diameter of the spline of the primary planetary carrier (12).

2. The axial stop for a planetary drive float mechanism of claim 1, wherein, The first blocking ring (6) is fixed with the secondary planetary carrier (2) through a first bolt (5).

3. The axial stop for a planetary drive float mechanism of claim 1, wherein, The second blocking ring (11) is fixed with the secondary planetary carrier (2) through a second bolt (9).

4. The axial stop for a planetary drive float mechanism of claim 1, wherein, The third blocking ring (14) is fixed with the primary planetary carrier (12) through a third bolt (13).

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