Adjustable double-limiting-ring positioning structure for motor clearance suppression

Abstract

The utility model, which belongs to the technical field of the motor, provides an adjustable double-spacing-ring positioning structure for motor clearance suppression, comprising a spacing ring body sleeved on an output shaft and located at one end of a motor body; the elastic piece is arranged on the output shaft in a sleeving manner; the internal thread sleeve is partially embedded into the positioning hole; the adjusting bolt is screwed into the internal thread sleeve in a thread screwing mode; according to the utility model, the spacing ring bodies are fixed at the two ends of the motor body to limit the clearance problem of the motor body, so that the axial movement of the motor body is reduced, and the operation precision of the motor body is improved; compared with a complex control algorithm, the control of the motor body vacancy can be realized through a simple mechanical structure, and the complexity and the cost of a control system are reduced; and the fixing position of the limiting ring body is adjustable, so that the limiting ring can adapt to different working conditions and load conditions.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically relating to a double-limiting ring positioning structure for suppressing virtual position in an adjustable motor. Background Technology

[0002] As a key piece of equipment in modern industry, the operating accuracy and stability of electric motors directly affect the performance and efficiency of the entire system.

[0003] However, due to factors such as mechanical wear and electromagnetic interference, motors often exhibit a "play" phenomenon during operation, meaning that the actual position of the motor deviates from its theoretical position. This deviation not only reduces the operating accuracy of the motor but may also have adverse effects on the entire system. Therefore, developing a technology that can effectively control motor play is particularly important.

[0004] To address the aforementioned problems, this utility model proposes a double-limiting ring positioning structure for suppressing virtual position in adjustable motors. Utility Model Content

[0005] To address the aforementioned problems in the existing technology, this utility model provides an adjustable double-limiting-ring positioning structure for suppressing motor dummy position, which features high stability and adjustability.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an adjustable motor misalignment suppression double-limiting-ring positioning structure, comprising:

[0007] The limiting ring body is sleeved on the output shaft and located at one end of the motor body, and multiple positioning holes are machined on the limiting ring body at equal intervals along the circumferential direction.

[0008] An elastic element is sleeved on the output shaft, with one end of the elastic element abutting against the limiting ring body and the other end abutting against the inner ring of the ball bearing.

[0009] Internal threaded sleeves, a plurality of internal threaded sleeves are fixed at equal intervals along the circumferential direction to the end face of the motor body, and the internal threaded sleeves are partially embedded in the positioning holes, with the internal threaded sleeves and the positioning holes having a clearance fit.

[0010] An adjusting bolt is screwed into the internally threaded sleeve via a threaded engagement method.

[0011] As a preferred embodiment of this utility model, the positioning hole, the internal threaded sleeve, and the adjusting bolt are all distributed at equal intervals along the circumferential direction.

[0012] As a preferred technical solution of this utility model, it also includes:

[0013] A positioning protrusion ring is fixed to one end of the limiting ring body facing the elastic member, and one end of the elastic member is sleeved on the positioning protrusion ring.

[0014] As a preferred embodiment of this utility model, the positioning protrusion and the limiting ring body are integral components formed by machining.

[0015] In a preferred embodiment of this invention, the elastic element is a spring.

[0016] As a preferred embodiment of this utility model, the elastic element has a conical structure, and the smaller end of the elastic element abuts against the limiting ring body.

[0017] As a preferred embodiment of this utility model, the elastic element includes:

[0018] The expansion section is a hollow frustum shape. The expansion section is sleeved on the output shaft, and the smaller end of the expansion section abuts against the limiting ring body. Multiple deformation holes are machined on the expansion section at equal intervals along the circumferential direction.

[0019] As a preferred embodiment of this utility model, the elastic element further includes:

[0020] The first planar ring is integrally formed at the larger end of the expansion section and abuts against the inner ring of the ball bearing.

[0021] The second planar ring is integrally formed at the smaller end of the expansion section and abuts against the limiting ring body.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] In this invention, the problem of misalignment of the motor body is limited by fixing limiting rings at both ends of the motor body, which can significantly reduce the axial movement of the motor body and thus improve the running accuracy of the motor body. Compared with complex control algorithms, this invention can control the misalignment of the motor body with a simple mechanical structure, which reduces the complexity and cost of the control system. The fixed position of the limiting ring is adjustable, which is convenient to adapt to different working conditions and load conditions.

[0024] Other additional advantages and beneficial effects of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this invention. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the diagram;

[0028] Figure 3 This is a schematic diagram of the isometric structure of the elastic element according to the first embodiment of this utility model;

[0029] Figure 4 This is an isometric structural diagram of the limiting ring body in this utility model;

[0030] Figure 5 A schematic diagram showing the connection of the adjusting bolt, internal threaded sleeve, and positioning hole;

[0031] Figure 6 This is a diagram showing the positional relationship between the elastic element and the limiting ring body;

[0032] Figure 7 This is a schematic diagram of the isometric structure of the elastic element according to another embodiment of the present invention.

[0033] In the diagram: 1. Motor body; 2. Ball bearing; 3. Output shaft;

[0034] 4. Limiting ring body; 41. Positioning hole; 42. Positioning protrusion ring;

[0035] 5. Elastic element; 51. Expansion section; 511. Deformation hole; 52. First planar ring; 53. Second planar ring;

[0036] 6. Internal threaded sleeve; 7. Adjusting bolt. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] It should be noted that there are usually two situations regarding the misalignment of the motor body 1 (axial movement of the motor body 1). One is the displacement of the output shaft 3 itself (such as axial runout or radial runout), and the other is the axial relative displacement of the output shaft 3 with other stationary components (such as the motor body). For the compensation and adjustment of the two misalignments, the limiting ring body 4 has different installation positions. In the first case, the limiting ring body 4 usually needs to be fixed to the output shaft 3 and rotate with the rotation of the output shaft 3. In the second case, the limiting ring body 4 needs to be fixed on a stationary structure such as the housing or bearing seat. This utility model will be introduced with the second case as an example. Please be aware of this.

[0039] Example 1

[0040] Please see Figures 1-6 The present invention provides the following technical solution: a double limit ring positioning structure for suppressing the virtual position of an adjustable motor, comprising: a limit ring body 4, an elastic element 5, an internal threaded sleeve 6, and an adjusting bolt 7.

[0041] Furthermore, by Figure 1 and Figure 2 As shown, in this embodiment, a pair of limiting ring bodies 4 are sleeved on the output shaft 3 and located at both ends of the motor body 1, and multiple positioning holes 41 are machined on each limiting ring body 4 at equal intervals along the circumferential direction. The positioning holes 41 are through holes.

[0042] The elastic element 5 is sleeved on the output shaft 3, with one end of the elastic element 5 abutting against the limiting ring body 4 and the other end abutting against the inner ring end face of the ball bearing 2. The elastic element 5 is in a compressed state.

[0043] Furthermore, one end of the elastic element 5 is fixedly connected to the limiting ring body 4.

[0044] Multiple internal threaded sleeves 6 are fixed at equal intervals along the circumferential direction to the end face of the motor body 1, and the internal threaded sleeves 6 are partially embedded in the positioning holes 41. The adjusting bolts 7 are screwed into the internal threaded sleeves 6 by thread engagement.

[0045] The adjusting bolt 7 includes a head and a screw, the screw being located inside the positioning hole 41 and threadedly connected to the internal threaded sleeve 6.

[0046] After adopting the above scheme, when in use, the installation position of the limit ring body 4 is positioned by embedding the internal threaded sleeve 6 into the positioning hole 41. The adjusting bolt 7 is rotated with a tool. Since the internal threaded sleeve 6 is fixedly connected to the motor body 1, the adjusting bolt 7 passes through the positioning hole 41 and is screwed into the internal threaded sleeve 6. The screwing depth of the adjusting bolt 7 will push the limit ring body 4 to move axially along the output shaft 3.

[0047] Specifically, the adjusting bolt 7 is screwed in to a greater depth until its head fits against the limiting ring body 4, and then the adjusting bolt 7 is screwed in further, and the limiting ring body 4 moves axially along with the adjusting bolt 7.

[0048] Specifically, the limiting ring body 4 moves along the outer wall of the internally threaded sleeve 6.

[0049] In addition, in other embodiments, in the initial state, the head of the adjusting bolt 7 is in contact with the limiting ring body 4.

[0050] When the limiting ring body 4 moves, it compresses the elastic element 5. The elastic force generated by the elastic element 5 is transmitted to the inner ring of the ball bearing 2, thereby changing the axial preload inside the ball bearing 2 corresponding to the limiting ring body 4.

[0051] The outer ring of the ball bearing 2 is interference-fitted with the motor body 1, and the inner ring rotates with the output shaft 3.

[0052] The axial preload is used to control the misalignment of the motor body 1, thereby improving the running accuracy of the motor body 1. Furthermore, the magnitude of the axial preload can be adjusted by loosening or tightening the adjusting bolt 7, making it easy to adapt to different working conditions and load conditions.

[0053] Taking the left-end limiting ring body 4 as an example, the following explanation will be given regarding "controlling the virtual position of the motor body 1 through axial preload":

[0054] like Figure 1 As shown, when the limiting ring body 4 moves to the right, it will compress the elastic element 5 at the left end, and the elastic force generated by the elastic element 5 at the left end will be transmitted to the inner ring of the ball bearing 2 at the left end.

[0055] Furthermore, since the outer ring of the ball bearing 2 at the left end is interference-fitted with the motor body 1, the axial preload applied to the inner ring of the ball bearing 2 at the left end increases as the limiting ring body 4 at the left end moves to the right.

[0056] Furthermore, since the inner ring rotates together with the output shaft 3, the axial preload on the output shaft 3 increases, thereby effectively suppressing the axial movement of the left inner ring, and ultimately effectively limiting the axial movement of the output shaft 3 of the motor body 1.

[0057] It should be noted that the limiting ring body 4 is preferably made of high-strength, wear-resistant materials, such as stainless steel or alloy steel, to ensure that it has sufficient strength and durability during use.

[0058] like Figure 1 As shown, a limiting ring body 4 is also provided at the right end of the output shaft 3, but it does not extend beyond the limiting ring body 4.

[0059] In addition, to reduce the friction between the limiting ring body 4 and the output shaft 3, the inner diameter of the limiting ring body 4 should be larger than the diameter of the output shaft 3. For example, the inner diameter of the limiting ring body 4 should be 0.1 mm larger than the diameter of the output shaft 3. A molybdenum disulfide composite coating can also be sprayed on the inner wall of the limiting ring body 4, with a friction coefficient ≤0.08, which can ensure the stability and service life of the limiting ring body 4.

[0060] Optionally, by Figure 1 and Figure 2 As shown in this embodiment, the positioning hole 41, the internal threaded sleeve 6, and the adjusting bolt 7 are all distributed at equal intervals along the circumference. After adopting the above scheme, in use, the above scheme is only an exemplary scheme of this utility model and is not intended to limit this utility model. In actual use, the positioning hole 41, the internal threaded sleeve 6, and the adjusting bolt 7 can also be designed to be other numbers, but should be at least three.

[0061] This uniformly distributed design ensures that the force is evenly distributed in all directions when adjusting the axial preload, avoiding uneven local force distribution that could lead to component wear or operational instability.

[0062] When adjusting the preload, certain operating procedures must be followed. First, prepare appropriate tools, such as a wrench that matches the specifications of the adjusting bolt 7. Then, the operator must carefully observe the operating requirements and current working status of the motor body 1 to determine the required preload. The accurate preload parameters can be obtained by referring to the instruction manual of the motor body 1 or relevant technical standards.

[0063] Then, adjust the four adjusting bolts 7 in diagonal order. For example, first adjust the two adjusting bolts 7 in diagonal positions, rotating them by the same angle each time to ensure that the limiting ring body 4 moves smoothly along the output shaft 3 axially and compresses the elastic element 5 evenly. During the adjustment process, professional measuring instruments, such as pressure sensors, can be used to monitor the elastic force generated by the elastic element 5 in real time to ensure the accuracy of the adjustment.

[0064] After completing the initial adjustment of a pair of diagonal adjusting bolts 7, perform the same operation on the other pair of diagonal adjusting bolts 7. Repeat this process, continuously fine-tuning the screw-in depth of each adjusting bolt 7 until the required preload is achieved. During the adjustment process, pay close attention to the operating status of the motor body 1, such as whether there is any abnormal noise, vibration, or temperature change. If any of these abnormalities occur, stop the adjustment immediately and check whether there are any problems in the adjustment process, such as whether a certain adjusting bolt 7 is screwed in too deeply or too shallowly.

[0065] After adjustment, further inspection and confirmation are required. Check again whether the adjusting bolt 7 is tightened securely to prevent changes in preload due to loosening during the operation of the motor body 1. At the same time, conduct a trial run of the motor body 1 to observe whether its operation is stable and whether all performance indicators meet the requirements. If everything is normal, it means that the preload adjustment is successful and it can be put into normal use. During the subsequent operation of the motor body 1, the preload also needs to be checked and maintained regularly to ensure that it is always within the appropriate range, so as to extend the service life of the motor body 1 and related components and ensure the efficient and stable operation of the motor body 1.

[0066] Preferably, by Figures 1-4 As shown, this embodiment also includes: a positioning protrusion ring 42, which is fixed to one end of the limiting ring body 4, and one end of the elastic element 5 is sleeved on the positioning protrusion ring 42. After adopting the above scheme, the setting of the positioning protrusion ring 42 further optimizes the installation stability and preload transmission efficiency of the elastic element 5 during use.

[0067] The outer diameter of the positioning convex ring 42 and the inner diameter of the elastic element 5 form a clearance fit. This design ensures that the elastic element 5 can be quickly aligned during assembly, avoiding uneven distribution of elastic force caused by manual assembly deviation.

[0068] The height (H) of the positioning protrusion 42 and the free length (L) of the elastic element 5 satisfy H≤(L×0.8), ensuring that the positioning protrusion 42 can still provide effective support when the elastic element 5 is compressed to the maximum working stroke. When the adjusting bolt 7 pushes the limit ring body 4 to move, the end face of the positioning protrusion 42 contacts the inner ring of the elastic element 5, and the axial force is evenly transmitted to the entire elastic element 5.

[0069] Optionally, by Figures 1-4 As shown, in this embodiment, the positioning protrusion 42 and the limiting ring body 4 are integral components formed by machining, which have high structural strength and ensure the stability of the positioning protrusion 42 and the limiting ring body 4.

[0070] In other available embodiments, the positioning protrusion 42 can also be fixed to one end of the limiting ring body 4 by conventional methods such as welding, screwing, or riveting to ensure the stability of the positioning protrusion 42 and the limiting ring body 4.

[0071] Optionally, by Figures 1-4 As shown in this embodiment, the elastic element 5 is a spring. With the above solution, the spring provides axial preload during use.

[0072] Preferably, by Figures 1-4As shown in this embodiment, the elastic element 5 has a conical structure, and the smaller end of the elastic element 5 abuts against the limiting ring body 4. With the above solution, during use, since the elastic element 5 has a conical structure, when the limiting ring body 4 is pushed by rotating the adjusting bolt 7 to compress the elastic element 5, a gradual change in preload will occur. Initially, the elastic deformation of the smaller end is small, and the preload increases relatively slowly. As the compression increases, the larger end gradually participates in the deformation, and the preload increases faster. This characteristic allows for more precise control when adjusting the preload, avoiding damage to the ball bearing 2 or other components due to applying too much preload at once.

[0073] The smaller end of the tapered elastic element 5 engages with the positioning convex ring 42, while the larger end contacts the inner ring end face of the ball bearing 2. This structure helps to achieve better axial alignment during assembly and adjustment. During compression, the tapered shape of the elastic element 5 itself can guide it to deform stably along the axial direction of the output shaft 3, reducing the radial force caused by installation deviation, thereby improving the operating stability and service life of the ball bearing 2.

[0074] Example 2

[0075] See also Figure 7 In this embodiment, the elastic element 5 includes: an expansion section 51, which is a hollow frustum shape. The expansion section 51 is sleeved on the output shaft 3, and the smaller end of the expansion section 51 abuts against the limiting ring body 4. Multiple deformation holes 511 are machined on the expansion section 51 and are evenly distributed along the circumferential direction.

[0076] With the above solution, the design of the deformation hole 511 allows the expansion section 51 to generate elastic deformation more flexibly when under force. When the rotating adjusting bolt 7 pushes the limiting ring body 4 to squeeze the expansion section 51, the material around the deformation hole 511 will bend and stretch, so that the expansion section 51 as a whole can generate a large amount of deformation with a small force. This means that when adjusting the preload of the ball bearing 2, the magnitude of the preload can be controlled more precisely. The preload can be finely adjusted by a small rotation angle, which improves the accuracy of the preload adjustment.

[0077] Multiple equally spaced deformation holes 511 along the circumference help to make the stress distribution of the expansion section 51 more uniform when under force. During compression, the material around each deformation hole 511 shares the pressure, avoiding local stress concentration. This uniform stress distribution can extend the service life of the expansion section 51, reduce material fatigue and damage caused by excessive local stress, and improve the reliability and stability of the elastic element 5.

[0078] Preferably, by Figure 5As shown in this embodiment, the elastic element 5 further includes a first planar ring 52 and a second planar ring 53. The first planar ring 52 is integrally formed at the larger end of the expansion section 51 and abuts against the inner ring of the ball bearing 2. The second planar ring 53 is integrally formed at the smaller end of the expansion section 51 and abuts against the end face of the limiting ring body 4. With the above scheme, in use, the design of the first planar ring 52 and the second planar ring 53 enables planar contact between the elastic element 5, the inner ring of the ball bearing 2, and the limiting ring body 4. When adjusting the preload, this planar contact method can evenly transmit the elastic force generated by the expansion section 51 to the contact surface. Compared with point contact or line contact, planar contact can avoid local stress concentration and ensure that the ball bearing 2 is subjected to uniform preload in all directions, thereby improving the operating stability and service life of the motor body 1 and the ball bearing 2.

[0079] Furthermore, the integrally formed first planar ring 52 and second planar ring 53, together with the expansion section 51, form an integral structure, which enhances the structural stability of the elastic element 5. During the operation of the motor body 1, when subjected to axial impact or vibration, this integral structure can better resist deformation and displacement, ensuring that the elastic element 5 is always in the correct position, effectively transmitting the preload, and reducing changes in preload and motor failures caused by the shaking or displacement of the elastic element 5.

[0080] The first planar ring 52, the second planar ring 53, and the expansion section 51 work together to further improve the buffering and vibration reduction performance of the elastic element 5. When the motor body 1 is subjected to axial impact or vibration, the first planar ring 52 and the second planar ring 53 can disperse the impact force to a larger area. At the same time, the expansion section 51 absorbs and consumes energy through the elastic deformation of the deformation hole 511. This synergistic effect can more effectively reduce the impact of the impact force on the ball bearing 2 and other components, reduce the vibration and noise level of the motor body 1, improve the smoothness and comfort of the motor body 1, and effectively reduce the play.

[0081] Components not described in detail in this article are existing technologies.

[0082] The working principle and usage process of this utility model: When using the positioning structure of this utility model, the installation position of the limiting ring body 4 is positioned by embedding the internal threaded sleeve 6 into the positioning hole 41. The adjusting bolt 7 is rotated with a tool. Since the internal threaded sleeve 6 is fixedly connected to the motor body 1, the screwing depth of the adjusting bolt 7 will push the limiting ring body 4 to move axially along the output shaft 3.

[0083] When the limiting ring body 4 moves, it will compress the elastic element 5. The elastic force generated by the elastic element 5 is transmitted to the inner ring of the ball bearing 2, thereby changing the axial preload inside the ball bearing 2.

[0084] The axial preload is used to control the misalignment of the motor body 1, thereby improving the running accuracy of the motor body 1. Furthermore, the magnitude of the axial preload can be adjusted by loosening or tightening the adjusting bolt 7, making it easy to adapt to different working conditions and load conditions.

[0085] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any 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 double-limiting ring positioning structure for adjustable motor virtual position suppression, characterized in that, include: The limiting ring body (4) is sleeved on the output shaft (3) and located at one end of the motor body (1). Multiple positioning holes (41) are machined on it at equal intervals along the circumferential direction. The elastic element (5) is sleeved on the output shaft (3), with one end abutting against the limiting ring body (4) and the other end abutting against the inner ring of the ball bearing (2); Several internally threaded sleeves (6) have one end fixed to the end face of the motor body (1) along the circumferential direction, and the other end embedded in the positioning hole (41); and adjusting bolt (7), the screw of which is located in the positioning hole (41) and threadedly connected to the internal threaded sleeve (6).

2. The double-limiting ring positioning structure for adjustable motor virtual position suppression according to claim 1, characterized in that: The positioning hole (41), the internal threaded sleeve (6), and the adjusting bolt (7) are all distributed at equal intervals along the circumference.

3. The double-limiting ring positioning structure for adjustable motor virtual position suppression according to claim 1, characterized in that: Also includes: Positioning protrusion (42) is fixed to one end of the limiting ring body (4) facing the elastic member (5), and one end of the elastic member (5) is sleeved on the positioning protrusion (42).

4. The double-limiting ring positioning structure for adjustable motor virtual position suppression according to claim 3, characterized in that: The positioning protrusion (42) and the limiting ring body (4) are integral components formed by machining.

5. The double-limiting ring positioning structure for adjustable motor virtual position suppression according to claim 1, characterized in that: The elastic element (5) is a spring.

6. The double-limiting ring positioning structure for adjustable motor virtual position suppression according to claim 5, characterized in that: The elastic element (5) has a conical structure, and the smaller end of the elastic element (5) abuts against the limiting ring body (4).

7. The double-limiting ring positioning structure for adjustable motor virtual position suppression according to claim 1, characterized in that: The elastic element (5) includes: The expansion section (51) is a hollow frustum shape. The expansion section (51) is sleeved on the output shaft (3), and the smaller end of the expansion section (51) abuts against the limiting ring body (4). Multiple deformation holes (511) are machined on the expansion section (51) at equal intervals along the circumferential direction.

8. The double-limiting ring positioning structure for adjustable motor virtual position suppression according to claim 7, characterized in that: The elastic element (5) also includes: The first planar ring (52) is integrally formed at the larger end of the expansion section (51) and abuts against the inner ring of the ball bearing (2); The second planar ring (53) is integrally formed on the smaller end of the expansion section (51) and abuts against the limiting ring body (4).

Images