A motor with an axial anti-slip structure for the rotating shaft

Abstract

This utility model relates to the field of anti-axial movement technology for rotating shafts, and discloses a motor with an anti-axial movement structure for the rotating shaft. The motor includes a motor housing, a rotating shaft rotatably mounted on the motor housing, and an anti-axial movement structure between the two to restrict the axial movement of the rotating shaft. The anti-axial movement structure includes two bearings rotatably connected to the motor housing between the rotating shaft and the motor housing, a limiting ring concentrically fixed on the rotating shaft between the two bearings, and a locking nut threaded into the motor housing to clamp the two bearings and the limiting ring when tightened. The motor uses the locking nut to clamp the bearings and the limiting ring, restricting the limiting ring from moving axially along the rotating shaft, thereby limiting axial movement. Furthermore, because of the threaded engagement between the locking nut and the motor housing, when the anti-axial movement performance deteriorates, simply tightening the locking nut again to clamp the bearings and the limiting ring is sufficient, making operation convenient and eliminating the need to replace parts, thus reducing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of anti-axial movement technology of rotating shafts, and in particular to a motor with an anti-axial movement structure for rotating shafts. Background Technology

[0002] When a motor is in use, due to factors such as dimensional installation deviations, axial load forces, and bearing fatigue damage, the shaft may move along its own axial direction, causing safety hazards.

[0003] Chinese Patent Application No. 202020820580.X discloses a structure for preventing axial movement of an air compressor motor and an air compressor. A first elastic component is provided between one end of the motor spindle and the shaft extension of the air compressor, and a second elastic component is provided on the side of the spindle away from the shaft extension. The spindle and the shaft extension are connected by a key to make them rotate synchronously. The housing of the motor is fixedly connected to the housing of the air compressor.

[0004] In the above scheme, when stationary, both the first and second elastic components are under pressure, restricting the axial displacement of the mandrel. However, the first and second elastic components are under compression deformation for a long time and under the continuous impact of axial load, which easily leads to a decrease in their elasticity, thereby reducing their anti-axial displacement performance. Therefore, the first and second elastic components need to be replaced frequently. The first and second elastic components are assembled inside the housing, making replacement difficult and maintenance costly. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies, such as the easy reduction of elasticity in elastic components and the difficulty in replacement, by providing a motor with an axial anti-slip structure for the rotating shaft that is easy to maintain.

[0006] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method:

[0007] An electric motor with an axial anti-slip structure for the rotating shaft includes a motor housing, a rotating shaft rotatably mounted on the motor housing, and an anti-slip structure between the two to restrict the axial movement of the rotating shaft. The anti-slip structure includes two bearings disposed between the rotating shaft and the motor housing, which rotatably connect the rotating shaft to the motor housing; a limiting ring concentrically fixed between the two bearings and the rotating shaft; and a locking nut that is threaded into the motor housing and, when locked, clamps the two bearings and the limiting ring with the motor housing.

[0008] By using the above solution, the bearing and the limiting ring are clamped by the locking nut and the motor housing, which restricts the axial movement of the limiting ring along the shaft and thus restricts the axial movement of the shaft. At the same time, since there is a threaded fit between the locking nut and the motor housing, when the anti-axial movement performance decreases, it is only necessary to tighten the locking nut to clamp the bearing and the limiting ring again. The operation is convenient and there is no need to replace parts, which reduces maintenance costs.

[0009] Preferably, the limiting ring includes two semicircular rings that can be separated from each other or close to each other and embrace each other. The semicircular rings are provided with a locking structure that restricts the two semicircular rings from embracing each other and keeps them away from each other. The outer ring wall of the rotating shaft is recessed with a ring groove for the semicircular rings to be fitted and engaged to restrict the relative movement of the limiting ring and the rotating shaft along the axial direction.

[0010] Using the above scheme, the limiting ring consists of two semi-circular rings, which facilitates its installation. Simply insert the two semi-circular rings into the ring groove and make them interlock to form a limiting ring concentric with the rotating shaft. The outer diameter of the limiting ring is larger than the outer diameter of the rotating shaft, ensuring that the two bearings can clamp the limiting ring. The engagement between the limiting ring and the ring groove restricts relative movement between the limiting ring and the rotating shaft along the axial direction of the shaft. After the two semi-circular rings interlock, the locking structure prevents the interlocking semi-circular rings from moving away from each other.

[0011] Preferably, the locking structure includes an open ring that clamps onto the outer ring wall of the two semicircular rings when the two semicircular rings are engaged.

[0012] Using the above method, the open ring can undergo restorable elastic deformation. During installation, the two ends of the open ring are driven away from each other, and the open ring is fitted onto the outer ring wall of the two semicircular rings. After the external force is removed, the open ring returns to its original clamping position on the outer ring wall of the two semicircular rings, preventing the two semicircular rings from moving away from each other.

[0013] Preferably, the outer ring walls of the two semicircular rings are recessed with semicircular grooves for the opening ring to be inserted.

[0014] By adopting the above solution, relative movement between the open ring and the semi-circular ring along the axis of rotation can be prevented, thereby preventing the open ring and the semi-circular ring from separating along the axis of rotation and ensuring the strength of the clamp.

[0015] Preferably, a locking structure is provided between the two ends of the opening of the open ring to prevent the two ends of the open ring from moving away from each other when the open ring clamps the two semicircular rings.

[0016] With the above solution, the elasticity of the open ring decreases over long-term use, causing the two ends of the open ring to move away from each other and become unfolded. This reduces the limiting effect on the two semicircular rings, and there is a risk that the two semicircular rings will move away from each other. By setting locking structures at both ends, the distance between the two ends of the open ring is limited, thus ensuring that the open ring is always clamped on the semicircular rings.

[0017] Preferably, the locking structure includes a protruding rod on one end of the open ring, a recessed slot on the other end of the open ring for inserting the rod, and a locking ring concentrically protruding on the inner ring wall of the slot. The outer ring wall of the rod is provided with a snap-fit ​​block that, when the rod is inserted into the slot, engages with the locking ring by squeezing and sliding, and is then limited to the bottom of the slot after passing the locking ring.

[0018] Using the above method, after the open ring is clamped on the semi-circular ring, the insertion rod is aligned with the slot, and under the action of external force, the locking block is driven to squeeze and slide with the locking ring, and then passes the locking ring limit and is positioned between the locking ring and the bottom of the slot, preventing the insertion rod from dislodging from the slot, thereby preventing the open ring from unfolding.

[0019] Preferably, the locking ring is provided with a notch for the locking block to pass through in the insertion direction, the insertion rod is rotatably located at the end of the open ring, and an anti-rotation structure is provided between the insertion rod and the end of the open ring to restrict the relative rotation of the insertion rod and the open ring when the locking block and the notch are misaligned.

[0020] Using the above method, when it is necessary to replace the limiting ring or the open ring, unlock the anti-rotation structure, drive the insertion rod to rotate until the locking block and the notch are aligned, and then the insertion rod can be pulled out of the slot. During installation, first drive the insertion rod to rotate until the locking block and the notch are misaligned, then use the anti-rotation structure to restrict the rotation of the insertion rod relative to the open ring, and finally, use external force to drive the insertion rod into the slot.

[0021] As a preferred embodiment, the anti-rotation structure includes a groove recessed on the outer ring wall of the insertion rod, a through groove on the outer ring wall of the open ring that is aligned with the groove when the locking block rotates to a misalignment with the notch, and a locking pin that passes through the through groove and is inserted into the groove to restrict the relative rotation of the insertion rod and the open ring.

[0022] Using the above scheme, one end of the locking pin passes through the through groove and is inserted into the groove, restricting the rotation of the insertion rod relative to the open ring.

[0023] This utility model, by adopting the above technical solution, has significant technical effects:

[0024] The use of semi-circular rings and open rings makes the assembly and disassembly of the limiting rings more convenient; by setting a locking structure, the two ends of the open ring are restricted from moving away from each other, thereby ensuring that the open ring is always clamped on the semi-circular ring, making the engagement of the two semi-circular rings more stable.

[0025] By using a lock nut to clamp the bearing and the limit ring with the motor housing, the axial movement of the limit ring along the shaft is restricted, thereby limiting the axial movement of the shaft. At the same time, since there is a threaded fit between the lock nut and the motor housing, when the anti-axial movement performance decreases, it is only necessary to tighten the lock nut to clamp the bearing and the limit ring again. The operation is convenient and there is no need to replace parts, reducing maintenance costs. Attached Figure Description

[0026] Figure 1 This is a top view of a motor with an axial anti-slip structure for the rotating shaft in Embodiment 1;

[0027] Figure 2 yes Figure 1 Sectional view at point AA;

[0028] Figure 3 yes Figure 2 Enlarged view of point B in the image;

[0029] Figure 4 This is a front view of the assembly of the rotating shaft, limiting ring, and locking structure in a motor with an axial anti-slip structure in Embodiment 1.

[0030] Figure 5 yes Figure 4 Sectional view at point C;

[0031] Figure 6 This is a half-sectional view of the assembly of the rotating shaft, limiting ring and locking structure in a motor with an axial anti-slip structure in Embodiment 2;

[0032] Figure 7 yes Figure 6 Enlarged view of point D in the image;

[0033] Figure 8 yes Figure 7 Enlarged view of point E in the image;

[0034] Figure 9 This is an exploded view of the rotating shaft, limiting ring, and locking structure in a motor with an axial anti-slip structure in Embodiment 2;

[0035] Figure 10 yes Figure 9 Enlarged view of point F in the image;

[0036] Figure 11 This is a partial enlarged view of the locking structure in a motor with an axial anti-slip structure in Embodiment 2, when it is disassembled.

[0037] The parts referred to by the numbers in the above attached diagrams are as follows: 1. Motor housing; 2. Shaft; 3. Bearing; 4. Limiting ring; 5. Locking nut; 6. Semicircular ring; 7. Ring groove; 8. Open ring; 9. Semicircular slot; 10. Insert rod; 11. Slot; 12. Locking ring; 13. Snap-fit ​​block; 14. Guide slope; 15. Notch; 16. Groove; 17. Through groove; 18. Locking pin. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0039] Example 1

[0040] A motor with an axial anti-slip structure for the rotating shaft, as shown in the reference. Figures 1 to 5 The motor housing 1 and the shaft 2 are provided. A bearing 3 is provided between the inner wall of the motor housing 1 and the outer ring wall of the shaft 2, so that the shaft 2 is rotatably connected to the motor housing 1. Two bearings 3 are provided at intervals along the axial direction of the shaft 2.

[0041] A limiting ring 4 is provided on the outer ring wall of the rotating shaft 2 between the two bearings 3. The limiting ring 4 and the rotating shaft 2 will not have relative displacement along the axial direction of the rotating shaft 2. The outer diameter of the limiting ring 4 is larger than the outer diameter of the rotating shaft 2. In this embodiment, two limiting rings 4 are spaced apart along the axial direction of the rotating shaft 2. A locking nut 5 is threaded onto the motor housing 1. The locking nut 5 is concentrically positioned with the rotating shaft 2. When the locking nut 5 is tightened, the opposite sides of the two bearings 3 abut against the motor housing 1 and the locking nut 5, respectively. The opposite sides of the two bearings 3 abut against the opposite sides of the two limiting rings 4, respectively. Since the limiting rings 4 and the rotating shaft 2 will not have relative displacement along the axial direction of the rotating shaft 2, the locking nut 5 and the motor housing 1 cooperate to clamp the two bearings 3 and the two limiting rings 4, preventing axial movement of the rotating shaft 2. The inner ring of bearing 3 rotates synchronously with the shaft 2, so the inner ring of bearing 3 abuts against the limiting ring 4. The outer ring of bearing 3 is relatively stationary with respect to the motor housing 1, so the outer ring of bearing 3 abuts against the motor housing 1 and the locking nut 5, thereby ensuring the smooth rotation of the shaft 2 and reducing jamming.

[0042] The limiting ring 4 includes two semicircular rings 6, which can be far apart or close together to form a limiting ring 4 concentric with the rotating shaft 2. The outer ring wall of the rotating shaft 2 is concentrically recessed with an annular groove 7. The limiting ring 4 formed by the two semicircular rings 6 being close together is adapted to and engaged with the annular groove 7, restricting the relative movement of the limiting ring 4 and the rotating shaft 2 along the axial direction of the rotating shaft 2.

[0043] It also includes a locking structure for preventing the two semicircular rings 6 from moving away from each other when they are engaged. The locking structure includes an open ring 8 that clamps onto the outer ring wall of the two semicircular rings 6 when they are engaged, and a semicircular groove 9 is recessed on the outer ring wall of the two semicircular rings 6 for the open ring 8 to be engaged.

[0044] Compared to using springs directly or simply setting two bearings 3 for axial anti-runaway, axial movement is still unavoidable under high axial load conditions on the shaft 2. Furthermore, springs and bearings 3 are easily damaged under the impact of high axial loads. This solution effectively reduces the axial displacement of the shaft 2 and prevents axial movement by locking the semi-circular ring 6 with the open ring 8, adapting the ring groove 7 to the semi-circular ring 6, and clamping the bearing 3 and the limiting ring 4 with the locking nut 5 and the housing. Even under high load conditions, it can still provide excellent axial anti-runaway effect.

[0045] In addition, the dimensions of the semicircular ring 6 and the open ring 8 can be adjusted according to the actual size of the motor and the load requirements. When the dimensions of the semicircular ring 6 and the open ring 8 are small, they can provide excellent axial anti-movement effect without significantly increasing the volume and weight, making them suitable for application scenarios that require miniaturization, such as micro motors. When the dimensions of both are large, they can be used in motors or mechanical equipment of other sizes, and have strong versatility.

[0046] During installation, first, insert the two semicircular rings 6 into the ring grooves 7, causing them to clamp together to form a limiting ring 4. External force drives the two ends of the open ring 8 to move away from each other, and then the unfolded open ring 8 is fitted onto the two semicircular rings 6. After the external force is removed, the two ends of the open ring 8 move closer together, returning to their original C-shape and clamping into the semicircular grooves 9 of the two semicircular rings 6, preventing them from moving away from each other. Next, fit the two bearings 3 onto the rotating shaft 2, ensuring that the opposite sides of the two bearings 3 abut against the opposite sides of the two limiting rings 4. Finally, install the rotating shaft 2, with the limiting rings 4 and bearings 3 assembled, into the motor housing 1 and tighten the locking nut 5. This locks the bearings 3 and the limiting rings 4, preventing axial movement of the rotating shaft 2. If the anti-axial movement performance deteriorates, simply tighten the locking nut 5 to re-clamp the bearings 3 and limiting rings 4. This convenient operation eliminates the need for parts replacement, reducing maintenance costs.

[0047] Example 2

[0048] Compared to Example 1, refer to Figures 6 to 11 In this embodiment, a locking structure is provided between the two ends of the opening of the open ring 8. When the open ring 8 clamps the two semicircular rings 6, the locking structure restricts the two ends of the open ring 8 from moving away from each other, preventing the opening ring 8 from unfolding after long-term use and causing a decrease in locking ability.

[0049] The locking structure includes a protruding insertion rod 10 on one end of the open ring 8, and a recessed slot 11 for inserting the insertion rod 10 on the other end of the open ring 8. A locking ring 12 is concentrically protruding on the inner ring wall of the slot 11, and a snap-fit ​​block 13 is protruding on the outer ring wall of the insertion rod 10. Both the snap-fit ​​block 13 and the locking ring 12 have guide slopes 14. When the insertion rod 10 is inserted into the slot 11, the snap-fit ​​block 13 and the guide slopes 14 on the locking ring 12 engage in a sliding fit, allowing the snap-fit ​​block 13 to pass over the locking ring 12 and be positioned between the locking ring 12 and the bottom of the slot 11. At least one locking ring 12 is spaced apart along the depth direction of the slot 11. The snap-fit ​​block 13 is positioned with different locking rings 12, allowing adjustment of the locking degree of the open ring 8 on the semi-circular ring 6.

[0050] The locking ring 12 has a notch 15 for the latching block 13 to pass through in the insertion direction. The insertion rod 10 is rotatably mounted at the end of the open ring 8. An anti-rotation structure is provided between the insertion rod 10 and the end of the open ring 8 to restrict the relative rotation of the insertion rod 10 and the open ring 8 when the latching block 13 and the notch 15 are misaligned. The anti-rotation structure includes a groove 16 recessed on the outer ring wall of the insertion rod 10, a through groove 17 on the outer ring wall of the open ring 8 that is aligned with the groove 16 when the latching block 13 rotates to a position where it is misaligned with the notch 15, and a locking pin 18 that passes through the through groove 17 and is inserted into the groove 16 to restrict the relative rotation of the insertion rod 10 and the open ring 8. The insertion rod 10 is made of an elastic material and can undergo recoverable elastic deformation during rotation to ensure that the insertion rod 10 can rotate smoothly relative to the open ring 8. The locking pin 18 is made of an elastic material so that the locking pin 18 elastically abuts against the groove 16 and the through groove 17, reducing the possibility of the locking pin 18 coming off.

[0051] During installation, the insertion rod 10 is first rotated until the locking block 13 and the notch 15 are misaligned, and the groove 16 and the through groove 17 are aligned. One end of the locking pin 18 passes through the through groove 17 and is inserted into the groove 16, restricting the rotation of the insertion rod 10 relative to the open ring 8, thus completing the assembly of the insertion rod 10 and the open ring 8. The process of installing the open ring 8 on the semi-circular ring 6 is the same as in embodiment 1. When the open ring 8 is clamped on the semi-circular ring 6, external force drives the insertion rod 10 to be inserted into the slot 11. After the locking block 13 and the locking ring 12 are squeezed and slid together, the insertion rod 10 passes over the locking ring 12 and is limited between the locking ring 12 and the bottom of the slot 11, preventing the insertion rod 10 from disengaging from the slot 11, thereby preventing the open ring 8 from unfolding.

[0052] When it is necessary to replace the limit ring 4 or the open ring 8, pull out the locking pin 18, drive the insertion rod 10 to rotate until the locking block 13 is aligned with the notch 15, and then pull out the insertion rod 10 from the slot 11.

[0053] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A motor with an axial anti-tracking structure for the rotating shaft, comprising a motor housing (1), a rotating shaft (2) rotatably mounted on the motor housing (1), and an anti-tracking structure disposed between the two to restrict the axial movement of the rotating shaft (2), characterized in that: The anti-slip structure includes two bearings (3) provided between the rotating shaft (2) and the motor housing (1) to rotatably connect the rotating shaft (2) to the motor housing (1), a limiting ring (4) concentrically fixed between the two bearings (3) and the rotating shaft (2), and a locking nut (5) that is threadedly engaged with the motor housing (1) and clamps the two bearings (3) and the limiting ring (4) with the motor housing (1) when locking.

2. The electric machine with the shaft axial anti-channeling structure according to claim 1, characterized in that: The limiting ring (4) includes two semicircular rings (6) that can be far apart or close together. The semicircular rings (6) are provided with a locking structure to restrict the two semicircular rings (6) from moving away from each other. The outer ring wall of the rotating shaft (2) is recessed with an annular groove (7) for the semicircular rings (6) to be fitted and snapped together to restrict the limiting ring (4) and the rotating shaft (2) to move relative to each other along the axial direction.

3. The electric machine with axial anti-leakage structure of rotating shaft according to claim 2, characterized in that: The locking structure includes an open ring (8) that clamps onto the outer ring wall of the two semicircular rings (6) when the two semicircular rings (6) are engaged.

4. The electric machine with the shaft axial anti-channeling structure according to claim 3, characterized in that: The outer ring wall of the two semi-circular rings (6) is recessed with a semi-circular groove (9) for the opening ring (8) to be inserted.

5. The electric machine with axial anti-leakage structure of rotating shaft according to claim 3, characterized in that: A locking structure is provided between the two ends of the opening of the open ring (8) to restrict the two ends of the open ring (8) from moving away from each other when the open ring (8) clamps the two semicircular rings (6).

6. The electric machine with axial anti-leakage structure of rotating shaft according to claim 5, characterized in that: The locking structure includes a protruding insertion rod (10) on one end of the open ring (8), a recessed slot (11) for inserting the insertion rod (10) on the other end of the open ring (8), and a locking ring (12) concentrically protruding on the inner ring wall of the slot (11). The outer ring wall of the insertion rod (10) is provided with a snap-fit ​​block (13) that, when the insertion rod (10) is inserted into the slot (11), engages with the locking ring (12) by squeezing and sliding, and is then limited to the bottom between the locking ring (12) and the slot (11) after passing the locking ring (12).

7. The electric machine with axial anti-leakage structure of rotating shaft according to claim 6, characterized in that: The locking ring (12) is provided with a notch (15) for the locking block (13) to pass through in the insertion direction. The insertion rod (10) is rotatably disposed at the end of the open ring (8). An anti-rotation structure is provided between the ends of the insertion rod (10) and the open ring (8) to restrict the relative rotation of the insertion rod (10) and the open ring (8) when the locking block (13) and the notch (15) are misaligned.

8. The electric machine with axial anti-leakage structure of rotating shaft according to claim 7, characterized in that: The anti-rotation structure includes a groove (16) recessed on the outer ring wall of the insertion rod (10), a through groove (17) provided on the outer ring wall of the open ring (8) that is opposite to the groove (16) when the locking block (13) rotates to the point of misalignment with the notch (15), and a locking pin (18) that passes through the through groove (17) and is inserted into the groove (16) to restrict the relative rotation of the insertion rod (10) and the open ring (8).

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