High-load outer-ring-free bearing of planetary gear

Abstract

The invention discloses a high-load outer-ring-free bearing of a planetary gear, and relates to the technical field of outer-ring-free bearings. Comprising a bearing installation part, two sealing auxiliary parts are installed on the bearing installation part, and the two sealing auxiliary parts are used for prolonging the sealing service life; a pushing piece is mounted on the sealing auxiliary piece on the right side; the pushing piece is sleeved with a roller retaining piece, and the roller retaining piece is sleeved on the bearing mounting piece; two direction limiting pieces are mounted on the pushing piece, and the direction limiting pieces are used for preventing reverse use; the problems that an existing bearing without an outer ring is not convenient to automatically and radially compensate and seal, and the bearing and a planetary gear are not convenient to control and position after being assembled are solved. The service life of the rubber ring can be prolonged by adopting the sealing auxiliary part, elastic extrusion expansion can be assisted, and elasticity reduction caused by long-term use of the rubber ring can be adapted.

Description

Technical Field

[0001] This invention relates to the field of outer ringless bearing technology, specifically to a high-load outer ringless planetary gear bearing. Background Technology

[0002] Planetary gear systems are widely used in industrial robot reducers and other applications. Ringless bearings are a core component for achieving compact transmission. Their key feature is that the inner ring of the planetary gear can be used as the outer ring of the bearing. High-load planetary gear transmissions typically employ full-complement rollers to enhance load-bearing capacity. When installing ringless bearings, it's usually necessary to first insert the planetary gear onto the gear shaft to prevent the inner ring from expanding due to interference fit when first inserted, which would increase wear on subsequent planetary gear assembly. Ringless bearings are usually shipped with roller protection sleeves to prevent rollers from scattering. However, current ringless bearings do not facilitate automatic radial compensation sealing. Over time, the reduced elasticity of the seal ring directly increases oil leakage, affecting roller life. Furthermore, after assembling the bearing and planetary gear, positioning is difficult to control, especially in confined spaces where manual handling is unstable. Subsequent insertion of the bearing inner ring onto the gear shaft can lead to displacement of the planetary gear and bearing, requiring further pressing and repositioning, increasing wear. It also makes it difficult to prevent reverse installation, affecting the bearing's interference fit.

[0003] Therefore, we propose a high-load planetary gear bearing without an outer ring. Summary of the Invention

[0004] The purpose of this invention is to provide a high-load planetary gear bearing without an outer ring, so as to solve the problems mentioned in the background art that current bearings without outer rings are not convenient for automatic radial compensation sealing and are not convenient for control and positioning after assembly of the bearing and planetary gear.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a planetary gear high-load bearing without an outer ring, comprising a bearing mounting component, wherein two sealing auxiliary components are mounted on the bearing mounting component, the two sealing auxiliary components being used to improve the sealing life; a pusher component is mounted on the right side of the sealing auxiliary component; a roller retainer is sleeved on the pusher component, and the roller retainer is sleeved on the bearing mounting component; two directional limiting components are mounted on the pusher component, and the directional limiting components are used to prevent reverse rotation; the bearing mounting component includes: a bearing inner ring and rollers, wherein two rollers are rolled and fitted on the bearing inner ring, and the two rollers are fully loaded; threads are respectively provided at both ends of the bearing inner ring.

[0006] Preferably, the bearing mounting component further includes: an oil drain hole and an oil groove; an oil drain hole is formed on the inner ring of the bearing; an oil groove is formed on the inner ring of the bearing; the oil drain hole is used to guide oil; and the two rollers are used to fit into the inner ring of the planetary gear.

[0007] Preferably, the sealing auxiliary component includes: a retaining ring and a sliding sleeve, wherein the retaining ring is threadedly connected to the inner ring of the bearing; the sliding sleeve is fitted onto the inner ring of the bearing, and the inner side of the sliding sleeve has an inclined structure; the retaining ring is located on the side of the inner ring of the bearing; the retaining ring and the retaining ring are concentric.

[0008] Preferably, the sealing auxiliary component further includes: a sealing spring and a rubber ring, wherein a sealing spring is respectively sleeved on the inner side of the sliding sleeve, and the sealing spring is connected between the sealing retaining ring and the sliding sleeve; a rubber ring is sleeved on the inner ring of the bearing, and the rubber ring is an elastic rubber structure; the rubber ring is pressed and fitted at the inclined surface of the sliding sleeve, and the rubber ring is used to elastically fit the inner ring of the planetary gear.

[0009] Preferably, the pusher component includes: a pusher ring located on the side of the closed retaining ring; the inner diameter of the pusher ring is the same as the inner diameter of the bearing inner ring; the pusher ring is made of engineering plastic.

[0010] Preferably, the pusher further includes: a bearing magnet, wherein a ring of bearing magnets is fixedly embedded on the pusher ring, and the ring of bearing magnets magnetically attracts the retaining rings; the bearing magnets are used to position the inner ring of the bearing.

[0011] Preferably, the roller retainer includes: a retaining sleeve and a gear chamfered stop, wherein the retaining sleeve is of plastic structure; the retaining sleeve is sleeved on the outside of the two rollers; the retaining sleeve is used to prevent the two rollers from falling off; the gear chamfered stop is fixedly installed at the bottom of the retaining sleeve, and the gear chamfered stop is used to insert into the chamfer of the inner ring of the planetary gear; the push ring is sleeved inside the retaining sleeve, and the push ring and the retaining sleeve are interference fit.

[0012] Preferably, the roller retainer further includes: a one-way groove and a gear magnet, and two one-way grooves are formed on the inner side of the retaining cylinder; a ring of gear magnets is fixedly embedded at the bottom of the retaining cylinder, and the ring of gear magnets is used to magnetically attach to the planetary gears.

[0013] Preferably, the directional limiting component includes: a limiting slider and a ratchet block. Two limiting sliders are slidably inserted into the push ring, and the two limiting sliders are respectively located inside the retaining cylinder. A ratchet block is fixedly installed at the end of each of the two limiting sliders, and the two ratchet blocks are respectively inserted into two one-way slots. The ratchet block is used for one-way limiting.

[0014] Preferably, the directional limiting component further includes: limiting springs, with limiting springs respectively sleeved inside the two limiting sliders, and the two limiting springs respectively connected between the two limiting sliders and the push ring.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention uses a sealing auxiliary component to increase the service life of the rubber ring, which can assist in elastic compression and expansion, and adapt to the reduction of elasticity of the rubber ring due to long-term use. At the same time, this structure can achieve radial expansion and compression to fit the inner ring of the planetary gear, making the structure more compact and not protruding from both ends of the planetary gear, so it can be used inside the planetary gear.

[0016] The use of roller retainers, in conjunction with push-pull components, facilitates the alignment of the bearing inner ring with the planetary gear inner ring during assembly. This reduces roller wear. Furthermore, the minute gap between the rollers and the planetary gear inner ring accommodates the interference fit expansion after the bearing inner ring is press-fitted. Magnetic force can be used to maintain assembly stability after the bearing inner ring is inserted into the planetary gear inner ring, eliminating the need for manual handling of both the bearing inner ring and the planetary gear simultaneously. This ensures stability of both the bearing inner ring and the planetary gear during subsequent pressing of the bearing inner ring into the gear shaft.

[0017] Using directional limiting components can assist workers in guiding the bearing inner ring to the correct assembly direction, ensuring the bearing magnet magnetically attracts the retaining ring, ensuring the bearing inner ring is installed correctly, and maintaining assembly quality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the roller mounting position according to the present invention; Figure 2 This is a schematic diagram of the overall structure of a planetary gear high-load bearing without outer ring according to the present invention; Figure 3 This is a partial sectional view of a planetary gear high-load bearing without an outer ring according to the present invention; Figure 4 This is a schematic diagram of the bearing mounting component structure of the present invention; Figure 5 This is a schematic diagram of the sealing auxiliary component structure of the present invention; Figure 6 For the present invention Figure 3 Enlarged view of the structure of region B in the middle; Figure 7 This is a schematic diagram of the pusher structure of the present invention; Figure 8 This is a schematic diagram of the roller retainer structure of the present invention.

[0019] In the diagram: 1. Bearing mounting component; 101. Bearing inner ring; 1011. Roller; 1012. Oil vent hole; 102. Oil groove; 2. Sealing auxiliary component; 201. Sealing retainer ring; 202. Sliding sleeve; 203. Sealing spring; 204. Rubber ring; 3. Pushing component; 301. Pushing ring; 302. Bearing magnet; 4. Roller retainer; 401. Retaining sleeve; 4011. Gear chamfer stop; 4012. One-way groove; 402. Gear magnet; 5. Directional limiting component; 501. Limiting slider; 5011. Ratchet; 502. Limiting spring. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figures 1 to 8 As shown: This invention provides a technical solution: a planetary gear high-load bearing without an outer ring, comprising a bearing mounting part 1, on which two sealing auxiliary parts 2 are mounted to improve the sealing life; a pusher part 3 is mounted on the right sealing auxiliary part 2; a roller retainer 4 is sleeved on the pusher part 3 and is sleeved on the bearing mounting part 1; two directional limiting parts 5 are mounted on the pusher part 3 and are used to prevent reverse rotation; the bearing mounting part 1 includes: a bearing inner ring 101 and rollers 1011, with two rollers 1011 rollingly fitted on the bearing inner ring 101 and the two rollers 1011 being fully filled; threads are provided at both ends of the bearing inner ring 101.

[0022] The bearing mounting component 1 further includes: an oil drain hole 1012 and an oil groove 102; an oil drain hole 1012 is formed on the inner ring 101 of the bearing; an oil groove 102 is formed on the inner ring 101 of the bearing; the oil drain hole 1012 is used to guide oil; two rollers 1011 are used to fit into the inner ring of the planetary gear; the sealing auxiliary component 2 includes: a retaining ring 201 and a sliding sleeve 202; the retaining ring 201 is threaded onto the inner ring 101 of the bearing; a sliding sleeve 202 is fitted onto the inner ring 101 of the bearing. The sliding sleeve 202 has an inner slope structure; the retaining ring 201 is located on the side of the inner ring 101 of the bearing; the retaining ring 201 and the retaining ring 202 are concentric; the sealing auxiliary component 2 also includes: a sealing spring 203 and a rubber ring 204, with the sealing spring 203 respectively sleeved on the inner side of the sliding sleeve 202, and the sealing spring 203 connected between the retaining ring 201 and the sliding sleeve 202; the rubber ring 204 is sleeved on the inner ring 101 of the bearing, and the rubber ring 204 is... The structure features an elastic rubber structure. A rubber ring 204 is pressed and adhered to the inclined surface of the sliding sleeve 202, and the rubber ring 204 is used to elastically adhere to the inner ring of the planetary gear. The use of a sealing auxiliary component 2 can increase the service life of the rubber ring 204, assisting in elastic compression and expansion, and adapting to the reduction in elasticity of the rubber ring 204 due to long-term use. Simultaneously, this structure can achieve radial expansion and compression to adhere to the inner ring of the planetary gear, resulting in a more compact structure that does not protrude from either end of the planetary gear. It is suitable for use inside planetary gears and can reduce oil leakage through a sealing method without affecting the normal rotation of the planetary gear. The structure is simple. After the actual planetary gear is fitted with the roller 1011, the rubber ring 204 adheres to the inner side of the planetary gear. Under the compression of the sealing spring 203, the sliding sleeve 202 is pushed to compress the rubber ring 204. The inclined structure on the side of the sliding sleeve 202 can further compress the elastic rubber ring 204 outwards, maintaining its adherence to the inner side of the planetary gear.

[0023] The pusher component 3 includes a pusher ring 301 located on the side of the retaining ring 201; the inner diameter of the pusher ring 301 is the same as the inner diameter of the bearing inner ring 101; the pusher ring 301 is made of engineering plastic; the pusher component 3 also includes a bearing magnet 302, a ring of bearing magnets 302 is fixedly embedded on the pusher ring 301, and the ring of bearing magnets 302 magnetically attracts the retaining ring 201; the bearing magnets 302 are used to position the bearing inner ring 101; the roller retainer 4 includes a retaining sleeve 401 and a gear chamfer stop 4011, the retaining sleeve 401 is made of plastic; the retaining sleeve 401 is sleeved on the two rings of rollers 1011. Externally; the retaining sleeve 401 is used to prevent the two rings of rollers 1011 from scattering; a gear chamfer stop 4011 is fixedly installed at the bottom of the retaining sleeve 401, and the gear chamfer stop 4011 is used to insert into the chamfer of the inner ring of the planetary gear; the push ring 301 is sleeved inside the retaining sleeve 401, and the push ring 301 and the retaining sleeve 401 are interference fit; the roller retainer 4 also includes: a one-way groove 4012 and a gear magnet 402, and two one-way grooves 4012 are opened on the inner side of the retaining sleeve 401; a ring of gear magnets 402 is fixedly embedded at the bottom of the retaining sleeve 401, and the ring of gear magnets 402 is used to magnetically attach to the planetary gears, using The roller retainer 4, in conjunction with the pusher 3, facilitates the alignment of the bearing inner ring 101 with the planetary gear inner ring during assembly, reducing wear on the roller 1011. Simultaneously, the pusher 3 facilitates the insertion of the bearing inner ring 101 into the planetary gear inner ring. Furthermore, the small gap between the roller 1011 and the planetary gear inner ring allows for the expansion of the bearing inner ring 101 after press-fitting. Magnetic force can be used to maintain assembly stability after insertion, eliminating the need for manual handling of both the bearing inner ring 101 and the planetary gear simultaneously, thus ensuring... When the bearing inner ring 101 is subsequently assembled and pressed into the gear shaft, the bearing inner ring 101 and the planetary gear remain stable. This avoids the problem that if the bearing inner ring 101 expands due to the interference fit when there is misalignment between the planetary gear and the bearing inner ring 101, the tightness of the contact between the roller 1011 and the planetary gear will increase. If the planetary gear is then adjusted to be flush with the bearing inner ring 101, the wear of the roller 1011 on the inner ring of the planetary gear will be greatly increased. The structure is simple, reduces the difficulty of operation for workers, and improves the assembly quality. At the same time, the original retaining sleeve 401 can also be used to maintain the stability of the roller 1011 in place.

[0024] In Embodiment 2, based on Embodiment 1, the directional limiting component 5 includes: a limiting slider 501 and a ratchet block 5011. Two limiting sliders 501 are slidably inserted into the push ring 301, and the two limiting sliders 501 are respectively located inside the retaining cylinder 401; ratchet blocks 5011 are respectively fixedly installed at the ends of the two limiting sliders 501, and the two ratchet blocks 5011 are respectively inserted into two one-way grooves 4012; the ratchet blocks 5011 are used for one-way limiting; the directional limiting component 5 also includes: a limiting spring 502, a limiting spring 502 is respectively sleeved inside the two limiting sliders 501, and the two limiting springs 502 are respectively connected to the two limiting sliders 501. Between 01 and the push ring 301, a directional limiting component 5 is used to assist the operator in indicating the direction of the bearing inner ring 101's push assembly, ensuring that the bearing magnet 302 magnetically attracts the sealing retaining ring 201, ensuring that the bearing inner ring 101 is installed correctly, and maintaining assembly quality. When the push ring 301 is pressed down, the ratchet block 5011 will not be limited and can retract naturally, driving the limiting slider 501 to retract inward and squeeze the limiting spring 502. Conversely, if the bearing inner ring 101 is pushed from below in the opposite direction, the push ring 301 can stop, and the ratchet block 5011 will be stuck in the one-way groove 4012 under the compression of the limiting spring 502, preventing reverse assembly.

[0025] The working principle of this embodiment is as follows: First, when it is necessary to install the bearing inner ring 101, the gear chamfer stop 4011 can be inserted into the chamfer of the planetary gear inner ring for positioning. At this time, the gear magnet 402 can magnetically attract the planetary gear. Then, the push ring 301 can be manually pressed down to push the bearing inner ring 101 into the planetary gear inner ring. At this time, the bearing magnet 302 can stop and magnetically attract the sealing ring 201 to position the bearing inner ring 101. Subsequently, the retaining sleeve 401 can be held by hand, and the push ring 301 can be pressed down with a press to insert the bearing inner ring 101 into the gear shaft for assembly. In actual operation... After the planetary gear is fitted with roller 1011, the rubber ring 204 adheres to the inner side of the planetary gear. Under the compression of the sealing spring 203, the sliding sleeve 202 is pushed to compress the rubber ring 204. The inclined structure on the side of the sliding sleeve 202 can further compress the elastic rubber ring 204 to expand outward, keeping it in contact with the inner side of the planetary gear, reducing the effects of aging and low temperature, especially for heavy-duty bearings, and maintaining lubrication quality. When the push ring 301 is pressed down, the ratchet block 5011 can be unrestricted and can retract naturally, driving the limit slider 501 to retract inward and compress the limit spring 502.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A planetary gear high-load bearing without outer ring, comprising a bearing mounting component (1), wherein two sealing auxiliary components (2) are mounted on the bearing mounting component (1), characterized in that: The two sealing aids (2) are used to improve the sealing life; a pusher (3) is installed on the right sealing aid (2); a roller retainer (4) is sleeved on the pusher (3), and the roller retainer (4) is sleeved on the bearing mounting (1); Two directional limiting members (5) are installed on the pusher (3), and the directional limiting members (5) are used for anti-reverse purposes; The bearing mounting component (1) includes: a bearing inner ring (101) and rollers (1011). Two rollers (1011) are rolled and fitted on the bearing inner ring (101), and the two rollers (1011) are fully loaded. The bearing inner ring (101) is provided with threads at both ends.

2. The planetary gear high-load bearing without outer ring according to claim 1, characterized in that: The bearing mounting component (1) further includes: an oil drain hole (1012) and an oil groove (102). An oil drain hole (1012) is provided on the inner ring (101) of the bearing; an oil groove (102) is provided on the inner ring (101) of the bearing; the oil drain hole (1012) is used to guide oil; and the two rollers (1011) are used to fit into the inner ring of the planetary gear.

3. The planetary gear high-load bearing without outer ring according to claim 1, characterized in that: The sealing auxiliary component (2) includes: a retaining ring (201) and a sliding sleeve (202). The retaining ring (201) is threaded onto the inner ring (101) of the bearing. The sliding sleeve (202) is fitted onto the inner ring (101) of the bearing, and the inner side of the sliding sleeve (202) is a beveled structure. The retaining ring (201) is located on the side of the inner ring (101) of the bearing. The retaining ring (201) and the retaining ring (202) are concentric.

4. The planetary gear high-load bearing without outer ring according to claim 3, characterized in that: The sealing auxiliary component (2) further includes: a sealing spring (203) and a rubber ring (204). The inner side of the sliding sleeve (202) is respectively fitted with a sealing spring (203), and the sealing spring (203) is connected between the sealing retaining ring (201) and the sliding sleeve (202). The bearing inner ring (101) is fitted with a rubber ring (204), and the rubber ring (204) is an elastic rubber structure. The inclined surface of the sliding sleeve (202) is pressed and fitted with the rubber ring (204), and the rubber ring (204) is used to elastically fit the inner ring of the planetary gear.

5. A planetary gear high-load bearing without outer ring according to claim 3, characterized in that: The pusher (3) includes: a pusher ring (301), which is located on the side of the closed retaining ring (201); the inner diameter of the pusher ring (301) is the same as the inner diameter of the bearing inner ring (101); the pusher ring (301) is made of engineering plastic.

6. A planetary gear high-load bearing without outer ring according to claim 5, characterized in that: The pusher (3) further includes: a bearing magnet (302), a ring of bearing magnets (302) is fixedly embedded on the pusher ring (301), and the ring of bearing magnets (302) magnetically attracts the retaining ring (201); the bearing magnets (302) are used to position the bearing inner ring (101).

7. A planetary gear high-load bearing without outer ring according to claim 5, characterized in that: The roller retainer (4) includes: a retainer (401) and a gear chamfer stop (4011). The retainer (401) is made of plastic. The retainer (401) is sleeved on the outside of two rollers (1011). The retainer (401) is used to prevent the two rollers (1011) from falling off. The gear chamfer stop (4011) is fixedly installed at the bottom of the retainer (401), and the gear chamfer stop (4011) is used to insert into the chamfer of the inner ring of the planetary gear. The push ring (301) is sleeved inside the retainer (401), and the push ring (301) and the retainer (401) are interference fit.

8. A planetary gear high-load bearing without outer ring according to claim 7, characterized in that: The roller retainer (4) further includes: a one-way groove (4012) and a gear magnet (402). Two one-way grooves (4012) are opened on the inner side of the retaining cylinder (401). A ring of gear magnets (402) is fixedly embedded at the bottom of the retaining cylinder (401), and the ring of gear magnets (402) is used to magnetically attach to the planetary gears.

9. A planetary gear high-load bearing without outer ring according to claim 8, characterized in that: The directional limiting component (5) includes: a limiting slider (501) and a ratchet block (5011). Two limiting sliders (501) are slidably inserted into the push ring (301), and the two limiting sliders (501) are respectively located inside the retaining cylinder (401). The ends of the two limiting sliders (501) are respectively fixedly installed with ratchet blocks (5011), and the two ratchet blocks (5011) are respectively inserted into two one-way grooves (4012). The ratchet blocks (5011) are used for one-way limiting.

10. A planetary gear high-load bearing without outer ring according to claim 9, characterized in that: The directional limiting component (5) further includes a limiting spring (502), with the limiting spring (502) respectively sleeved inside the two limiting sliders (501), and the two limiting springs (502) respectively connected between the two limiting sliders (501) and the push ring (301).

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