A chip-proof and oil-proof structure for lead screws combining a labyrinth ring and a bearing housing.

Abstract

This utility model relates to the field of motor component technology, specifically to a screw anti-chip and oil-proof structure combining a labyrinth ring and a bearing housing. It includes a motor housing and a servo motor fixedly mounted on the motor housing. A coupling is fixedly connected to the output end of the servo motor, and a ball screw is fixedly connected to one end of the coupling. The ball screw passes through one side of the motor housing, and a bearing housing is rotatably connected to the end of the ball screw. Multiple sets of screw bearings are fitted inside the bearing housing. A protective structure is provided between the end of the ball screw and the top of the bearing housing. The protective structure is installed inside the bearing housing. With the multiple sets of screw bearings combined, the servo motor drives the ball screw at the end of the coupling to rotate. When the ball screw rotates inside the bearing housing, the top protective structure prevents oil and water from entering the bearing along the gap, and also prevents debris and oil from entering the bearing housing when stationary or rotating, thus providing better protection for the screw bearing.

Description

Technical Field

[0001] This utility model relates to the field of motor component technology, and in particular to a chip-proof and oil-proof structure for a lead screw consisting of a labyrinth ring and a bearing housing. Background Technology

[0002] In traditional lead screw drive components, oil seals are used to protect the bearing housing from debris or oil / water intrusion when the shaft is vertical or inclined. However, friction between the oil seal and the lead screw contact point can cause wear and heat generation. Debris can also accumulate above the bearing housing and rotate with the oil seal, leading to wear and eventual failure of the oil seal protection.

[0003] In the prior art, such as the patent with publication number CN210715799U, a dustproof ball screw assembly is disclosed, including a screw, a collar is installed on one side of the screw, an end cap is provided on the inner side of the collar, and a sealing ring is installed on one end of the collar. A ball nut is installed between the sealing ring and the collar, and a dust cover is provided on one end of the sealing ring. An installation sleeve is provided between the dust cover and the sealing ring, and a connecting bolt is installed on the outer side of the installation sleeve.

[0004] The above structure prevents dust, chips, and hard sand particles from entering through the dust cover. However, when the lead screw is in the rotating position, it hinders the use of the bearing housing, and debris accumulates and follows above the dust cover, eventually leading to the failure of protection. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a screw anti-chip and anti-oil structure combining a labyrinth ring and a bearing housing, so as to solve the problem that the screw hinders the use of the bearing housing when it is in the rotating position, and that debris will accumulate and follow above the dust cover, eventually leading to the failure of protection.

[0006] Based on the above objectives, this utility model provides a screw anti-chip and anti-oil structure combining a labyrinth ring and a bearing seat, including a motor seat and a servo motor fixedly mounted on the motor seat. The output end of the servo motor is fixedly connected to a coupling, and one end of the coupling is fixedly connected to a ball screw, which has a stepped structure.

[0007] The ball screw passes through one side of the motor housing, and a bearing housing is rotatably connected to the end of the ball screw. Multiple sets of screw bearings are sleeved inside the bearing housing. A spacer is provided on one side of the screw bearing. The spacer is sleeved on the outside of the bearing housing. A bearing cap is snapped onto the outside of the spacer, and a locking nut connected to the ball screw is provided at the bottom of the spacer.

[0008] A protective structure is provided between the end of the ball screw and the top of the bearing housing to prevent debris and oil from entering.

[0009] Preferably, the protective structure includes a labyrinth ring snapped onto the top of the bearing housing, the labyrinth ring having a groove on its outer side, and a sealing ring snapped onto the inner wall of the labyrinth ring, the sealing ring being sleeved on the outside of the lead screw bearing;

[0010] A wedge-shaped block is engaged between the inner wall of the bearing housing and the outer wall of the labyrinth ring.

[0011] Preferably, the bottom of the labyrinth ring has a positioning hole that fits into the top of the bearing seat, and the top of the labyrinth ring is sloped.

[0012] Preferably, the bottom end of the labyrinth ring abuts against the top of the ball screw bearing, and the inner diameter of the labyrinth ring matches the inner diameter of the ball screw.

[0013] Preferably, at least four sets of lead screw bearings are provided, and the lead screw bearings and labyrinth rings are coaxially arranged.

[0014] Preferably, a hexagonal head screw is provided through the bearing cap and the bearing housing, and at least six sets of the hexagonal head screw are provided.

[0015] The beneficial effects of this utility model are:

[0016] The protective structure is installed inside the bearing housing. With the combination of multiple sets of ball screw bearings, the ball screw at the end of the coupling is rotated by a servo motor. When the ball screw rotates inside the bearing housing, the top protective structure can prevent oil and water from entering the bearing along the gap. It can also prevent debris and oil and water from entering the bearing housing when stationary or rotating, thus providing better protection for the ball screw bearing. There is no heat generation caused by oil seal friction, the bearing accuracy is more stable, the bearing service life is extended, and after-sales maintenance is reduced. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a front view of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the present invention.

[0020] Figure 3 This is a schematic diagram of the internal structure of the protective structure of this utility model.

[0021] Figure 4This is a bottom view of the overall structure of this utility model.

[0022] The markings in the diagram are: 1. Labyrinth ring; 2. Sealing ring; 3. Bearing housing; 4. Screw bearing; 5. Bearing cap; 6. Spacer ring; 7. Locking nut; 8. Socket head cap screw; 9. Servo motor; 10. Coupling; 11. Motor housing; 12. Ball screw; 13. Groove; 14. Wedge block. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0024] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a screw anti-chip and anti-oil structure combining a labyrinth ring and a bearing seat includes a motor base 11 and a servo motor 9 fixedly mounted on the motor base 11. The output end of the servo motor 9 is fixedly connected to a coupling 10, and one end of the coupling 10 is fixedly connected to a ball screw 12. The ball screw 12 is configured with a stepped structure.

[0025] The ball screw 12 passes through one side of the motor housing 11. The end of the ball screw 12 is rotatably connected to the bearing housing 3. Multiple sets of screw bearings 4 are sleeved inside the bearing housing 3. A spacer 6 is provided on one side of the screw bearing 4. The spacer 6 is sleeved on the outside of the bearing housing 3. A bearing cap 5 is snapped onto the outside of the spacer 6. A locking nut 7 connected to the ball screw 12 is provided at the bottom of the spacer 6.

[0026] A protective structure is provided between the end of the ball screw 12 and the top of the bearing housing 3 to prevent debris and oil from entering.

[0027] In this embodiment, the protective structure is installed inside the bearing housing 3. With the combination of multiple sets of lead screw bearings 4, the ball screw 12 at the end of the coupling 10 is driven to rotate by the servo motor 9. When the ball screw 12 rotates inside the bearing housing 3, the top protective structure can prevent oil and water from entering the bearing along the gap. It can also prevent debris and oil and water from entering the bearing housing 3 when stationary or rotating, thus providing better protection for the lead screw bearing 4. There is no heat generated by friction, the bearing accuracy is more stable, the bearing service life is extended, and after-sales maintenance is reduced.

[0028] As one implementation method, such as Figure 1 , Figure 2 and Figure 3 As shown, the protective structure includes a labyrinth ring 1 that is snapped onto the top of the bearing housing 3. The labyrinth ring 1 has a groove 13 on its outer side, and a sealing ring 2 is snapped onto the inner wall of the labyrinth ring 1. The sealing ring 2 is sleeved on the outside of the lead screw bearing 4.

[0029] A wedge-shaped block 14 is engaged between the inner wall of the bearing housing 3 and the outer wall of the labyrinth ring 1.

[0030] The bottom of the labyrinth ring 1 is provided with a positioning hole that fits into the top of the bearing seat 3. The top of the labyrinth ring 1 is set with an incline, and the end face of the bearing seat 3 has an inclination angle. Debris and oil will fall off due to gravity and the rotation of the labyrinth ring 1 to avoid accumulation.

[0031] In this embodiment, the sealing ring 2 inside the labyrinth ring 1 strengthens the connection between the labyrinth ring 1 and the ball screw 12 in the combination of the labyrinth ring 1 and the bearing housing 3, which can prevent oil and water from entering the bearing along the gap between the labyrinth ring 1 and the ball screw 12, and the wedge block 14 can prevent the labyrinth ring 1 from disengaging when it rotates.

[0032] The ball screw 12 at the end of the coupling 10 is driven to rotate by the servo motor 9. When the ball screw 12 rotates inside the bearing housing 3, the labyrinth ring 1 and the bearing housing 3 can prevent debris and oil from entering the bearing when stationary or rotating. The groove 13 on the outside of the labyrinth ring 1 can throw out oil during the rotation process.

[0033] As one implementation method, such as Figure 2 and Figure 3 As shown, the bottom end of the labyrinth ring 1 abuts against the top of the ball screw bearing 4, and the inner diameter of the labyrinth ring 1 matches the inner diameter of the ball screw 12.

[0034] In this embodiment, when the ball screw 12 rotates inside the screw bearing 4 inside the bearing housing 3, the screw bearing 4 and the labyrinth ring 1 rotate simultaneously, preventing debris and oil from entering the bearing housing 3.

[0035] As one implementation method, such as Figure 2 and Figure 3 As shown, at least four sets of lead screw bearings 4 are provided, and the lead screw bearings 4 and the labyrinth ring 1 are coaxially arranged.

[0036] In this embodiment, the use of multiple sets of lead screw bearings 4 can significantly improve the performance, rigidity, and lifespan of the transmission system, and also increase its load-bearing capacity.

[0037] As one implementation method, such as Figure 3 and Figure 4 As shown, a hexagonal head screw 8 is provided through the bearing cap 5 and the bearing housing 3, and at least six sets of hexagonal head screws 8 are provided.

[0038] In this embodiment, the spacer 6 and the bearing housing 3 are tightly connected by the internal hexagonal head screw 8, and the spacer 6 and the locking nut 7 lock the entire interior of the bearing housing 3, preventing the ball screw 12 from shifting when rotating inside the bearing housing 3.

[0039] Working principle: During use, the protective structure is installed inside the bearing housing 3. With the combination of multiple sets of screw bearings 4, the ball screw 12 at the end of the coupling 10 is driven to rotate by the servo motor 9. When the ball screw 12 rotates inside the bearing housing 3, the connection between the labyrinth ring 1 and the ball screw 12 is strengthened by the sealing ring 2 inside the labyrinth ring 1 and the bearing housing 3. This can prevent oil and water from entering the bearing along the gap between the labyrinth ring 1 and the ball screw 12. In addition, the wedge block 14 can prevent the labyrinth ring 1 from disengaging when it rotates.

[0040] The ball screw 12 at the end of the coupling 10 is driven to rotate by the servo motor 9. When the ball screw 12 rotates inside the bearing housing 3, the labyrinth ring 1 and the bearing housing 3 can prevent debris and oil from entering the bearing when stationary or rotating. The groove 13 on the outside of the labyrinth ring 1 can throw out oil during rotation, thus providing better protection for the screw bearing 4. There is no heat caused by friction, and the bearing accuracy is more stable.

[0041] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0042] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A thread rod dust and oil prevention structure combined with a labyrinth ring and a bearing seat, comprising a motor seat (11) and a servo motor (9) fixedly installed on the motor seat (11), characterized in that, The output end of the servo motor (9) is fixedly connected to a coupling (10), and one end of the coupling (10) is fixedly connected to a ball screw (12), which has a stepped structure. The ball screw (12) passes through one side of the motor housing (11). The end of the ball screw (12) is rotatably connected to a bearing housing (3). Multiple sets of screw bearings (4) are sleeved inside the bearing housing (3). A spacer (6) is provided on one side of the screw bearing (4). The spacer (6) is sleeved on the outside of the bearing housing (3). A bearing cap (5) is snapped onto the outside of the spacer (6). A locking nut (7) connected to the ball screw (12) is provided at the bottom of the spacer (6). A protective structure is provided between the end of the ball screw (12) and the top of the bearing housing (3) to prevent debris and oil from entering.

2. The structure according to claim 1, wherein the labyrinth ring is combined with the bearing seat. The protective structure includes a labyrinth ring (1) snapped onto the top of the bearing housing (3), the labyrinth ring (1) having a groove (13) on its outer side, and a sealing ring (2) snapped onto the inner wall of the labyrinth ring (1), the sealing ring (2) being sleeved on the outside of the lead screw bearing (4). A wedge-shaped block (14) is engaged between the inner wall of the bearing housing (3) and the outer wall of the labyrinth ring (1).

3. The structure according to claim 2, wherein the labyrinth ring is combined with the bearing seat. The bottom of the labyrinth ring (1) is provided with a positioning hole that fits into the top of the bearing seat (3), and the top of the labyrinth ring (1) is set with an inclined surface.

4. The structure according to claim 2, wherein the labyrinth ring is combined with the bearing seat. The bottom end of the labyrinth ring (1) abuts against the top of the ball screw bearing (4), and the inner diameter of the labyrinth ring (1) matches the inner diameter of the ball screw (12).

5. The structure according to claim 4, wherein the labyrinth ring is combined with the bearing seat. At least four sets of the lead screw bearing (4) are provided, and the lead screw bearing (4) and the labyrinth ring (1) are coaxially arranged.

6. The structure according to claim 1, wherein the labyrinth ring is combined with the bearing seat. A hexagonal head screw (8) is provided between the bearing cap (5) and the bearing seat (3), and at least six sets of the hexagonal head screw (8) are provided.

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