Novel adjustable gap eliminating nut
By designing an adjustable gap-removing nut, the adjustment ring and torsion spring are used to solve the problem that traditional nuts cannot be adjusted, dynamic compensation of gaps is achieved, and the precision and performance of the motor are improved.
Patent Information
- Application Number
- CN202422136852.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-09-02
AI Technical Summary
In high-precision motion control system, wear of screws and nuts leads to gap formation, causing position errors, affecting motor performance, and traditional gap-removing nuts cannot be adjusted according to actual conditions.
A new type of adjustable gap-removing nut is designed, including a first adjustment sleeve, a second adjustment sleeve, a torsion spring, a first transmission nut, a second transmission nut, a clamping ring and a clamping ring. By adjusting the clamping ring and a torsion spring, the state of the gap-removing nut is adjusted.
The design allows customers to adjust the gap-removing nut according to actual needs, change the torsion force of the torsion spring, thereby adjusting the axial force and resistance torque applied to the nut, improving motor performance and enhancing precision.
Smart Images
Figure CN222924880U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a backlash elimination component used in a stepping screw motor, in particular to a novel adjustable backlash elimination nut. Background Art
[0002] In the current field of motion automation, the external drive stepping motor uses a screw-nut drive to convert electrical pulses into an angular displacement and a position displacement actuator, which has been widely used in industrial equipment and occupies an important position.
[0003] With the improvement of the requirement for precision, especially for the motion control system, the screw and nut will show some wear after being used for a period of time, resulting in a gap between the screw and the nut. The gap will cause a position error when the screw or the nut is moving, thus affecting the performance of the motor, so it has become a problem that cannot be ignored.
[0004] Due to the above-mentioned gap causing errors in linear motion, in the case of high-precision positioning, this kind of error must be compensated. At present, the traditional backlash elimination nuts are set before leaving the factory, and the client cannot adjust them according to the actual situation. Content of the Utility Model
[0005] The utility model provides a novel adjustable backlash elimination nut, which can facilitate the client to adjust the backlash elimination nut according to actual needs.
[0006] The technical solution to solve the above technical problems is as follows:
[0007] A novel adjustable backlash elimination nut includes a first adjusting sleeve, a second adjusting sleeve, and a torsion spring. The torsion spring is sleeved on the first adjusting sleeve. The first adjusting sleeve is connected to the second adjusting sleeve. One end of the torsion spring is connected to the second adjusting sleeve. It also includes a first transmission nut, a second transmission nut, a retaining ring, and an adjusting retaining ring;
[0008] The first adjusting sleeve and the retaining ring are respectively sleeved on the first transmission nut and fixed to the first transmission nut. A plurality of first teeth are provided on the outer peripheral surface of the retaining ring, and a first tooth groove is formed between adjacent two first teeth;
[0009] The adjusting retaining ring is sleeved on the first adjusting sleeve. Second teeth are provided on the adjusting retaining ring. The second teeth are in sliding fit with the first tooth groove. The adjusting retaining ring is connected to the other end of the torsion spring;
[0010] The second transmission nut is connected to the first adjusting sleeve. The second adjusting sleeve is sleeved on the second transmission nut.
[0011] Further, the first transmission nut includes a first nut body and a first flange. The first nut body is fixed to the first flange. The retaining ring and the first adjusting sleeve are sleeved on the first nut body. The retaining ring is clamped between the first flange and the first adjusting sleeve.
[0012] Further, a plurality of first engaging teeth are provided on the outer peripheral surface of the first nut body, and these first engaging teeth are distributed along the circumferential direction of the first nut body, and a first engaging tooth groove is formed between two adjacent first engaging teeth;
[0013] Second engaging teeth are provided on the inner peripheral surface of the snap ring, and these second engaging teeth are distributed along the circumferential direction of the snap ring, and a second engaging tooth groove is formed between two adjacent second engaging teeth;
[0014] The first engaging teeth cooperate with the second engaging tooth grooves, and the second engaging teeth cooperate with the first engaging tooth grooves, so that the snap ring and the first drive nut are circumferentially fixed.
[0015] Further, a plurality of third engaging teeth are provided on the inner peripheral surface of the first adjusting sleeve, and these third engaging teeth are distributed along the circumferential direction of the first adjusting sleeve, and a third engaging tooth groove is formed between two adjacent third engaging teeth; the first engaging teeth cooperate with the third engaging tooth grooves, and the third engaging teeth cooperate with the first engaging tooth grooves, so that the first adjusting sleeve and the first drive nut are circumferentially fixed.
[0016] Further, the second drive nut includes a second nut body and a second flange, the second nut body is fixed to the second flange, and fourth engaging teeth are provided on the circumferential surface of the second nut body, and these fourth engaging teeth are distributed along the circumferential direction of the second nut body, and a fourth engaging tooth groove is formed between two adjacent fourth engaging teeth;
[0017] After the second nut body extends into the inner hole of the first adjusting sleeve, the fourth engaging teeth cooperate with the third engaging tooth grooves, and the third engaging teeth cooperate with the fourth engaging tooth grooves, so that the first adjusting sleeve and the second drive nut are circumferentially fixed.
[0018] Further, an external thread is provided on the outer peripheral surface of the first adjusting sleeve, and an internal thread is provided on the inner peripheral surface of the second adjusting sleeve, and the second adjusting sleeve is threadedly connected to the first adjusting sleeve to fix the second adjusting sleeve and the first adjusting sleeve.
[0019] During actual use by the customer, if it is necessary to adjust the state of the backlash eliminating nut, first slide the adjusting snap ring along the axial direction of the snap ring to completely disengage the adjusting snap ring from the snap ring, rotate the adjusting snap ring along the circumferential direction of the snap ring, the adjusting snap ring drives the torsion spring to rotate, so that the torsion spring increases or decreases the torsion force. After the adjusting snap ring rotates to the required position, the adjusting snap ring and the snap ring are circumferentially fixed again through teeth and tooth grooves. In the axial direction, under the tension of the torsion spring, the adjusting snap ring is ensured not to disengage from the snap ring. The present utility model changes the torsion force of the torsion spring in the above manner, thereby changing the axial force applied to the first drive nut and the second drive nut, and at the same time changing the resistance moment between the backlash eliminating nut and the screw. The present utility model has the advantage of convenient adjustment. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a sectional view of a new type of adjustable backlash-eliminating nut.
[0021] Figure 2 It is an exploded view of a new type of adjustable backlash-eliminating nut.
[0022] Figure 3 It is a three-dimensional view of the first driving nut.
[0023] Figure 4 It is a three-dimensional view of the first adjusting sleeve.
[0024] Figure 5 It is a three-dimensional view of the snap ring.
[0025] Figure 6 It is a three-dimensional view of the adjusting snap ring.
[0026] Figure 7 It is a three-dimensional view of the second driving nut.
[0027] Reference signs in the accompanying drawings: the first driving nut 1, the first nut body 1a, the first flange 1b, the first engaging tooth 1c, the first engaging tooth groove 1d, the second driving nut 2, the second nut body 2a, the second flange 2b, the fourth engaging tooth 2c, the fourth engaging tooth groove 2d, the first adjusting sleeve 3, the third engaging tooth 3a, the third engaging tooth groove 3b, the second adjusting sleeve 4, the first mounting hole 4a, the snap ring 5, the first tooth 5a, the first tooth groove 5b, the second engaging tooth 5c, the second engaging tooth groove 5d, the adjusting snap ring 6, the second tooth 6a, the second mounting hole 6b, the torsion spring 7, the gasket 8, the screw rod 9. Specific embodiments
[0028] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0029] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.
[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.
[0031] In the present utility model, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "connected to", "fixed" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0032] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0033] As Figures 1 to 7 shown, a novel adjustable backlash-eliminating nut of the present utility model includes a first adjusting sleeve 3, a second adjusting sleeve 4, and a torsion spring 7. The torsion spring 7 is sleeved on the first adjusting sleeve 3. The first adjusting sleeve 3 is connected to the second adjusting sleeve 4. One end of the torsion spring 7 is connected to the second adjusting sleeve 4. A first mounting hole 4a is provided on the second adjusting sleeve 4. One end of the torsion spring 7 is inserted into the first mounting hole 4a, and one end of the torsion spring 7 is in transitional fit with the first mounting hole 4a.
[0034] The utility model further includes a first drive nut 1, a second drive nut 2, a snap ring 5, and an adjusting snap ring 6. The first adjusting sleeve 3 and the snap ring 5 are respectively sleeved on the first drive nut 1 and fixed to the first drive nut 1. A plurality of first teeth 5a are provided on the outer peripheral surface of the snap ring 5, and a first tooth groove 5b is formed between two adjacent first teeth 5a. The adjusting snap ring 6 is sleeved on the first adjusting sleeve 3. A second tooth 6a is provided on the adjusting snap ring 6, and the second tooth 6a is in sliding fit with the first tooth groove 5b. The adjusting snap ring 6 is connected to the other end of the torsion spring 7. A second mounting hole 6b is provided on the adjusting snap ring 6, and the other end of the torsion spring 7 is inserted into the second mounting hole 6b, and the other end of the torsion spring 7 is in transitional fit with the second mounting hole 6b. The second drive nut 2 is connected to the first adjusting sleeve 3, and the second adjusting sleeve 4 is sleeved on the second drive nut 2.
[0035] The first drive nut 1 includes a first nut body 1a and a first flange 1b. The first nut body 1a is fixed to the first flange 1b. The snap ring 5 and the first adjusting sleeve 3 are sleeved on the first nut body 1a, and the snap ring 5 is clamped between the first flange 1b and the first adjusting sleeve 3.
[0036] A plurality of first engaging teeth 1c are provided on the outer peripheral surface of the first nut body 1a. These first engaging teeth 1c are distributed along the circumferential direction of the first nut body 1a, and a first engaging tooth groove 1d is formed between two adjacent first engaging teeth 1c. Second engaging teeth 5c are provided on the inner peripheral surface of the snap ring 5. These second engaging teeth 5c are distributed along the circumferential direction of the snap ring 5, and a second engaging tooth groove 5d is formed between two adjacent second engaging teeth 5c. The first engaging teeth 1c are in fit with the second engaging tooth groove 5d, and the second engaging teeth 5c are in fit with the first engaging tooth groove 1d, so that the snap ring 5 and the first drive nut 1 are circumferentially fixed. The first nut body 1a and the snap ring 5 are mutually fitted through the engaging teeth and the engaging tooth grooves, which is convenient for installation and disassembly on the one hand and convenient for replacement on the other hand.
[0037] A plurality of third engaging teeth 3a are provided on the inner peripheral surface of the first adjusting sleeve 3. These third engaging teeth 3a are distributed along the circumferential direction of the first adjusting sleeve 3, and a third engaging tooth groove 3b is formed between two adjacent third engaging teeth 3a. The first engaging teeth 1c are in fit with the third engaging tooth groove 3b, and the third engaging teeth 3a are in fit with the first engaging tooth groove 1d, so that the first adjusting sleeve 3 and the first drive nut 1 are circumferentially fixed.
[0038] The second drive nut 2 includes a second nut body 2a and a second flange 2b. The second nut body 2a is fixed to the second flange 2b. On the circumferential surface of the second nut body 2a, there are fourth engaging teeth 2c, which are distributed along the circumferential direction of the second nut body 2a. A fourth engaging tooth groove 2d is formed between two adjacent fourth engaging teeth 2c. After the second nut body 2a extends into the inner hole of the first adjusting sleeve 3, the fourth engaging teeth 2c cooperate with the third engaging tooth grooves 3b, and the third engaging teeth 3a cooperate with the fourth engaging tooth grooves 2d, so that the first adjusting sleeve 3 and the second drive nut 2 are circumferentially fixed.
[0039] On the outer circumferential surface of the first adjusting sleeve 3, there is an external thread, and on the inner circumferential surface of the second adjusting sleeve 4, there is an internal thread. The second adjusting sleeve 4 is threadedly connected to the first adjusting sleeve 3, so that the second adjusting sleeve 4 and the first adjusting sleeve 3 are fixed. A gasket 8 is also sleeved on the second nut body 2a, and the gasket 8 is clamped between the second adjusting sleeve 4 and the second flange 2b.
[0040] In the present utility model, the assembly process of the present utility model is as follows: In the first step, the first drive nut 1 is threadedly connected to the screw rod 9; in the second step, the snap ring 5, the first adjusting sleeve 3 and the first drive nut 1 are slidably mated through teeth and tooth grooves. The adjusting snap ring 6 and the torsion spring 7 are sleeved on the first adjusting sleeve 3, and the adjusting snap ring 6 and the snap ring 5 are slidably mated through teeth and tooth grooves. The other end of the torsion spring 7 is inserted into the second mounting hole 6b. In the third step, the torsion spring 7 is inserted into the first mounting hole 4a of the second adjusting sleeve 4, so that the second adjusting sleeve 4 is threadedly connected to the first adjusting sleeve 3. At the same time, the second adjusting sleeve 4 is rotated to drive the torsion spring 7 to rotate, so that the torsion spring 7 generates a reverse torsion force; in the fourth step, the gasket 8 is sleeved on the second nut body 2a of the second drive nut 2, and the second nut body 2a is inserted into the inner hole of the first adjusting sleeve 3, so that the second drive nut 2 and the first adjusting sleeve 3 are mated through teeth and tooth grooves. The screw rod 9 is rotated, so that the screw rod 9 enters and passes through the second drive nut 2, and the screw rod 9 is threadedly connected to the second drive nut 2.
[0041] During the actual use process by the customer, if it is necessary to adjust the state of the backlash-eliminating nut, first slide the adjusting snap ring 6 axially along the snap ring 5 to disengage the adjusting snap ring 6 from the snap ring 5, and then rotate the adjusting snap ring 6 circumferentially along the snap ring 5. The adjusting snap ring 6 drives the torsion spring 7 to rotate, so that the torsion spring 7 increases or decreases the torsion force. After the adjusting snap ring 6 rotates to the required position, the adjusting snap ring 6 and the snap ring 5 are circumferentially fixed again through teeth and tooth grooves. In the axial direction, under the tension of the torsion spring 7, the adjusting snap ring 6 is ensured not to disengage from the snap ring 5. The present utility model changes the torsion force of the torsion spring 7 in the above manner, thereby changing the axial force applied to the first drive nut 1 and the second drive nut 2, and at the same time changing the resistance moment between the backlash-eliminating nut and the screw rod.
Claims
1. A novel adjustable clearance-eliminating nut, comprising a first adjusting sleeve (3), a second adjusting sleeve (4), and a torsion spring (7), wherein the torsion spring (7) is sleeved on the first adjusting sleeve (3), the first adjusting sleeve (3) is connected to the second adjusting sleeve (4), and one end of the torsion spring (7) is connected to the second adjusting sleeve (4), characterized in that: It also includes a first transmission nut (1), a second transmission nut (2), a clamping ring (5), and an adjustment clamping ring (6); The first adjustment sleeve (3) and the clamping ring (5) are respectively sleeved on the first transmission nut (1) and fixed to the first transmission nut (1); a plurality of first teeth (5a) are provided on the outer peripheral surface of the clamping ring (5); and a first tooth groove (5b) is formed between two adjacent first teeth (5a); The adjusting collar (6) is sleeved on the first adjusting sleeve (3), the adjusting collar (6) is provided with a second tooth (6a), the second tooth (6a) is slidably matched with the first tooth groove (5b), and the adjusting collar (6) is connected to the other end of the torsion spring (7); The second transmission nut (2) is connected to the first adjustment sleeve (3), and the second adjustment sleeve (4) is sleeved on the second transmission nut (2).
2. A novel adjustable clearance-eliminating nut according to claim 1, characterized in that: The first transmission nut (1) comprises a first nut body (1a) and a first flange (1b), wherein the first nut body (1a) is fixed to the first flange (1b), a clamping ring (5) and a first adjustment sleeve (3) are sleeved on the first nut body (1a), and the clamping ring (5) is clamped between the first flange (1b) and the first adjustment sleeve (3).
3. A novel adjustable clearance-eliminating nut according to claim 2, characterized in that: A plurality of first combining teeth (1c) are provided on the outer circumferential surface of the first nut body (1a); the first combining teeth (1c) are distributed along the circumference of the first nut body (1a); and a first combining tooth groove (1d) is formed between two adjacent first combining teeth (1c); Second coupling teeth (5c) are provided on the inner circumferential surface of the clamping ring (5), and the second coupling teeth (5c) are distributed along the circumference of the clamping ring (5), and a second coupling tooth groove (5d) is formed between two adjacent second coupling teeth (5c); The first combining teeth (1c) cooperate with the second combining tooth grooves (5d), and the second combining teeth (5c) cooperate with the first combining tooth grooves (1d), so that the clamping ring (5) and the first transmission nut (1) are circumferentially fixed.
4. A novel adjustable clearance-eliminating nut according to claim 3, characterized in that: A plurality of third combining teeth (3a) are provided on the inner circumferential surface of the first adjustment sleeve (3); the third combining teeth (3a) are distributed along the circumference of the first adjustment sleeve (3); and a third combining tooth groove (3b) is formed between two adjacent third combining teeth (3a); the first combining teeth (1c) cooperate with the third combining tooth groove (3b), and the third combining teeth (3a) cooperate with the first combining tooth groove (1d), so that the first adjustment sleeve (3) and the first transmission nut (1) are circumferentially fixed.
5. A novel adjustable clearance-eliminating nut according to claim 4, characterized in that: The second transmission nut (2) comprises a second nut body (2a) and a second flange (2b), the second nut body (2a) being fixed to the second flange (2b), and fourth coupling teeth (2c) being arranged on the circumferential surface of the second nut body (2a), the fourth coupling teeth (2c) being distributed along the circumference of the second nut body (2a), and a fourth coupling tooth groove (2d) being formed between two adjacent fourth coupling teeth (2c); After the second nut body (2a) extends into the inner hole of the first adjustment sleeve (3), the fourth combining teeth (2c) cooperate with the third combining tooth grooves (3b), and the third combining teeth (3a) cooperate with the fourth combining tooth grooves (2d), so that the first adjustment sleeve (3) and the second transmission nut (2) are circumferentially fixed.
6. A novel adjustable clearance-eliminating nut according to any one of claims 1 to 5, characterized in that: The first adjustment sleeve (3) is provided with an external thread on its outer circumference, the second adjustment sleeve (4) is provided with an internal thread on its inner circumference, and the second adjustment sleeve (4) is threadedly connected to the first adjustment sleeve (3) so that the second adjustment sleeve (4) and the first adjustment sleeve (3) are fixed.