Motor structure with one-way self-locking function, linear brake and household equipment
By setting a conical fixing ring and friction ring in the motor structure, the locking is strengthened by the twitching of the motor shaft, the problem of poor locking performance in the existing motor structure when regulating home equipment is solved, and a stronger self-locking capability is achieved.
Patent Information
- Application Number
- CN202420728419.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-09
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-04-09
AI Technical Summary
When the existing motor structure adjusts the home equipment, the load-pressed motor shaft causes reversal and squirm, and the locking performance of the locking parts is poor.
Using a motor structure with one-way self-locking function, by setting a tapered structure in the inner ring of the fixing ring and the outer ring of the friction ring, the friction ring locking the motor shaft is strengthened by the twitching of the motor shaft.
It effectively improves the self-locking capability of the motor structure, ensuring that the motor shaft can be firmly locked when stopped, and avoids reversal and twitching.
Smart Images
Figure CN222602191U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of smart home technology, and in particular to a motor structure, a linear brake and a home appliance with a one-way self-locking function. Background Art
[0002] A linear brake is a device that converts rotational motion into linear motion. It is usually composed of a motor structure, a transmission system, and a control system. It is widely used in the field of smart homes, mainly to adjust the height and tilt angle of home appliances.
[0003] Among them, the motor structure mainly provides power for state adjustment of household appliances such as electric sofas and electric seats. The motor structure mainly includes a motor shaft and a motor body. One end of the motor shaft is connected to a load to drive the load in the household appliance. The other end of the motor shaft is connected to a locking piece to prevent the motor shaft from reversing.
[0004] However, taking the adjustment of the height of the electric seat as an example, after the electric seat stops at the required height, the load will press the motor shaft, which will not only cause the motor shaft to reverse, but also cause the motor shaft to move downward along its own axis away from the direction of the load, resulting in poor locking performance of the locking piece. Utility Model Content
[0005] The purpose of the present application is to provide a motor structure, a linear brake and a household appliance with a stronger self-locking capability.
[0006] In the first aspect, the present application provides a motor structure with a one-way self-locking function using the following technical solution:
[0007] A motor structure with a one-way self-locking function, comprising a motor shaft and a locking member for locking the motor shaft, wherein the locking member is installed at one end of the motor shaft and comprises a fixing ring and a friction ring with a first notch;
[0008] The fixing ring is plug-fitted with the friction ring, and at least one of the inner ring of the fixing ring and the outer ring of the friction ring is configured in a conical shape. The friction ring is sleeved on the motor shaft and can hold the motor shaft tightly when the motor shaft moves toward the fixing ring.
[0009] By adopting the above technical solution, under the influence of the conical surface of the fixed ring or the friction ring, when the motor shaft drives the friction ring to move in the direction close to the fixed ring, the friction ring will be squeezed and deformed, and the first notch on the friction ring will become smaller, thereby causing the friction ring to shrink and the motor shaft to be clamped, so as to utilize the movement of the motor shaft to strengthen the locking of the friction ring on the motor shaft.
[0010] Optionally, the outer ring of the friction ring is configured in a cone shape.
[0011] By adopting the above technical solution, compared with setting the inner ring of the fixed ring in a cone shape, directly setting the outer ring of the friction ring in a cone shape can better respond to the contraction action of the friction ring and enable the friction ring to hold the motor shaft tightly.
[0012] Optionally, the inner ring of the fixing ring is arranged in a cone shape, and the inner cone surface can fit with the outer cone surface of the friction ring.
[0013] By adopting the above technical solution, the inner conical surface of the fixed ring cooperates with the outer conical surface of the friction ring, so that the fixed ring can better squeeze the friction ring when the friction ring moves toward the fixed ring, and the stability is stronger.
[0014] Optionally, it further includes a limiting portion for enabling the fixing ring and the friction ring to be plugged in and matched, the limiting portion is mounted on the friction ring, and a first matching groove for inserting the limiting portion is provided on the fixing ring.
[0015] By adopting the above technical solution, the limiting part enables the fixing ring and the friction ring to be plug-fitted with each other, and the structure is simple.
[0016] Optionally, the limiting portion is mounted on the fixing ring, and the friction ring is provided with a second matching groove for the limiting portion to be inserted into.
[0017] By adopting the above technical solution, compared with the method of installing the limiting part to the friction ring, the structure of the friction ring is simpler and the production is convenient.
[0018] Optionally, a positioning ring for fixing the friction ring is further included, the positioning ring sleeve is fixed on the motor shaft, and the end face of the positioning ring abuts against the friction ring.
[0019] By adopting the above technical solution, the positioning ring can position the friction ring, prevent the friction ring from moving relative to the motor shaft, and ensure that the friction ring can better cooperate with the fixing ring and shrink.
[0020] Optionally, an annular groove is provided on the motor shaft, and the end surface of the positioning ring abuts against the groove wall of the annular groove.
[0021] By adopting the above technical solution, the ring groove can position the locating ring, so that the locating ring is fixed to the motor shaft, and the installation is also convenient.
[0022] Optionally, a second notch is provided on the positioning ring; or
[0023] The positioning ring comprises two arc-shaped positioning plates, and the two arc-shaped positioning plates are detachably connected.
[0024] By adopting the above technical solution, the positioning ring can be installed in the ring groove more conveniently.
[0025] In a second aspect, the present application provides a linear brake, comprising the above-mentioned motor structure with a one-way self-locking function.
[0026] In a third aspect, the present application provides a household appliance, comprising the above-mentioned motor structure with a one-way self-locking function.
[0027] In summary, the present application includes at least one of the following beneficial technical effects:
[0028] 1. In the present application, at least one of the inner ring of the fixed ring and the outer ring of the friction ring is set to be conical. When the motor shaft drives the friction ring to move in the direction close to the fixed ring, the friction ring will be squeezed and deformed, and the first notch on the friction ring will become smaller, thereby shrinking the friction ring and tightening the motor shaft, so as to utilize the movement of the motor shaft to strengthen the locking of the friction ring on the motor shaft.
[0029] 2. A positioning ring is provided in the present application, which can position the friction ring, prevent the friction ring from moving relative to the motor shaft, and ensure that the friction ring can better cooperate and shrink with the fixing ring. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 It is a three-dimensional structural schematic diagram of the motor structure in this application;
[0031] Figure 2 is a schematic cross-sectional view of the motor structure in this application;
[0032] Figure 3 It is a schematic diagram of the exploded structure of the motor structure in this application.
[0033] In the figure, 1, motor shaft; 11, ring groove; 2, locking piece; 21, fixing ring; 211, first matching groove; 22, friction ring; 221, first notch; 222, second matching groove; 3, sealing cover; 4, limiting part; 5, positioning ring; 51, second notch; 6, motor body. DETAILED DESCRIPTION
[0034] The following is combined with Figure 1 -Attached Figure 3 , further details of this application are given.
[0035] A household appliance (such as an electric seat, an electric sofa) and a linear brake, both of which include a motor structure with a one-way self-locking function, referring to Figure 1 and Figure 2 The motor structure includes a motor shaft 1, a motor body 6 and a locking member 2 for locking the motor shaft 1. The motor body 6 is sleeved on the motor shaft 1 and can drive the motor shaft 1 to rotate.
[0036] Furthermore, both ends of the motor shaft 1 extend out of the motor body 6. One end of the motor shaft 1 is in the shape of a screw, which is used to connect with the load in the household appliance to drive the load to move to adjust the state of the household appliance. The other end of the motor shaft 1 is connected to the locking piece 2 to prevent the motor shaft 1 from reversing.
[0037] Combination Figure 3 The locking member 2 includes a fixing ring 21 and a friction ring 22 with a first notch 221. The friction ring 22 is sleeved on the motor shaft 1 to hold the motor shaft 1 tightly, and the fixing ring 21 is fixed to one side of the motor shaft 1 and plugged with the friction ring 22. The setting of the first notch 221 allows the friction ring 22 to have two ends. When the fixing ring 21 and the friction ring 22 are plugged together, one end of the friction ring 22 is positioned.
[0038] Specifically, a limiting portion 4 is provided between the fixed ring 21 and the friction ring 22. In the present embodiment, the limiting portion 4 is mounted on the friction ring 22 and is provided at one end of the friction ring 22. A first matching groove 211 for inserting the limiting portion 4 is correspondingly provided on the fixed ring 21. The limiting portion 4 adopts a limiting block, which abuts against the groove wall of the first matching groove 211 to position one end of the friction ring 22. In other embodiments, the limiting portion 4 may also be provided in a columnar, spherical, etc. shape to ensure the plug-in fit between the friction ring 22 and the fixed ring 21.
[0039] Furthermore, in another embodiment, the limiting portion 4 may also be installed on the fixing ring 21, and a second matching groove 222 (not shown in the figure) for inserting the limiting portion 4 is correspondingly opened on the friction ring 22. In other embodiments, the limiting portion 4 is installed on both the fixing ring 21 and the friction ring 22, and the two limiting portions 4 can be respectively inserted into the corresponding second matching grooves 222, or the two limiting portions 4 can be engaged with each other.
[0040] When the motor shaft 1 is running normally, the inner ring of the fixed ring 21 and the outer ring of the friction ring 22 are gap-fitted, and the friction ring 22 is subjected to the centrifugal force. Since one end of the friction ring 22 is fixed, the other end of the friction ring 22 is deformed toward the fixed end of the friction ring 22, so that the first notch 221 on the friction ring 22 becomes larger, and the friction between the motor shaft 1 and the friction ring 22 is small, and the motor moves smoothly.
[0041] When the motor shaft 1 stops running, the load connected to one side of the motor shaft 1 will press the motor shaft 1, causing the motor shaft 1 to tend to rotate in the opposite direction. At this time, the friction ring 22 will be subjected to a radial force toward the axis of the motor shaft 1. At this time, the friction ring 22 will deform toward the end close to the fixed friction ring 22, causing the first notch 221 on the friction ring 22 to shrink, and the motor shaft 1 will be tightly embraced by the friction ring 22, thereby being self-locked.
[0042] In addition, when the motor shaft 1 is pressed by the load, the motor shaft 1 will not only have a tendency to rotate in the opposite direction, but also move in the direction close to the fixing ring 21, that is, the motor shaft 1 will also move along its own axial direction. Correspondingly, at least one of the inner ring of the fixing ring 21 and the outer ring of the friction ring 22 is configured in a conical shape, and the friction ring 22 can hold the motor shaft 1 tightly when the motor shaft 1 moves toward the fixing ring 21.
[0043] Specifically, in this embodiment, the inner ring of the fixing ring 21 and the outer ring of the friction ring 22 are both arranged in a conical shape.
[0044] When the motor shaft 1 is operating normally, the inner conical surface of the fixing ring 21 and the outer conical surface of the friction ring 22 are in clearance fit. When the motor shaft 1 moves toward the direction close to the fixing ring 21, the inner conical surface of the fixing ring 21 and the outer conical surface of the friction ring 22 are in contact. Under the action of the two conical surfaces, the first notch 221 on the friction ring 22 begins to become smaller, and the friction ring 22 contracts, so that the motor shaft 1 is clamped, and the friction force between the inner ring surface of the friction ring 22 and the motor shaft 1 increases, and the friction ring 22 is further clamped.
[0045] By means of the conical surface fit between the fixing ring 21 and the friction ring 22 , the movement of the motor shaft 1 when the motor shaft 1 stops running is utilized to strengthen the locking of the motor shaft 1 by the friction ring 22 .
[0046] It should be noted that, in another embodiment, only the inner ring of the fixed ring 21 or the friction ring 22 may be set to be conical, which can also achieve the same effect. Taking the conical setting of the inner ring of the fixed ring 21 as an example, when the friction ring 22 is driven by the motor shaft 1 and moves in the direction close to the fixed ring 21, the friction ring 22 first abuts against the inner conical surface of the fixed ring 21, and then in the process of gradually penetrating into the fixed ring 21, the friction ring 22 will gradually shrink and hold the motor shaft 1 tightly.
[0047] Reference Figure 2 and Figure 3 In order to prevent the possibility of the friction ring 22 slipping relative to the motor shaft 1 when the motor shaft 1 drives the friction ring 22 to move toward the fixed ring 21, a positioning ring 5 for positioning the friction ring 22 is fixed on the motor shaft 1, and the positioning ring 5 abuts against the friction ring 22. In this embodiment, an annular groove 11 is provided on the motor shaft 1, and the positioning ring 5 is sleeved on the motor shaft 1 and detachably connected to the motor shaft 1. Both end faces of the positioning ring 5 abut against the groove wall of the annular groove 11, so that the positioning ring 5 is tightened.
[0048] It should be noted that, in another embodiment, welding or integral molding may be used to fix the motor shaft 1 and the positioning ring 5 together.
[0049] Reference Figure 2 and Figure 3In order to facilitate the matching between the positioning ring 5 and the motor shaft 1, in this embodiment, a second notch 51 is opened on the positioning ring 5. When installing the positioning ring 5, the second notch 51 is aligned with the annular groove 11, and then the positioning ring 5 is inserted into the annular groove 11.
[0050] Furthermore, in other embodiments, the positioning ring 5 may also include two arc-shaped positioning plates, which are detachably connected by snap-fitting or screws. When installing the positioning ring 5, the two arc-shaped positioning plates are spliced together and then tightened.
[0051] Reference Figure 2 and Figure 3 The second notch 51 is provided to form two ends of the positioning ring 5, and both ends of the positioning ring 5 are provided with rounded corners to prevent relevant personnel from being scratched when installing the positioning ring 5. In addition, the inner ring of the positioning ring 5 extends toward the center of the positioning ring 5 with a positioning tooth, which is inserted into the ring groove 11, and the end of the positioning tooth facing the center of the positioning ring 5 is rounded to reduce the friction between the positioning tooth and the positioning groove.
[0052] Combination Figure 1 , and also includes a sealing cover 3 for sealing one end of the motor shaft 1. The sealing cover 3 is detachably connected to the motor body 6, and the sealing cover 3 and the locking member 2 are located at the same end of the motor shaft 1. In this embodiment, a receiving hole is opened on the sealing cover 3 for installing the locking member 2, wherein the mounting ring is detachably connected to the receiving hole. In other embodiments, the mounting ring may also be integrally formed with the sealing cover 3.
[0053] The implementation principle of the embodiment of the present application is as follows: the friction ring 22 is plugged into and matched with the fixing ring 21 so that one end of the friction ring 22 is fixed. When the motor shaft 1 stops running and moves, the friction ring 22 will abut against the fixing ring 21. With the cooperation of the conical surface between the fixing ring 21 and the friction ring 22, the friction ring 22 shrinks and holds the motor shaft 1 tightly. When the motor shaft 1 has a tendency to reverse, the friction ring 22 is subjected to a radial force toward the motor shaft 1 and further shrinks. By utilizing the movement of the motor shaft 1 during the stopping process, the locking of the motor shaft 1 by the friction ring 22 is strengthened, the locking force is stronger, and the locking of the motor shaft 1 is more secure.
[0054] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A motor structure with a one-way self-locking function, characterized in that: It comprises a motor shaft (1) and a locking member (2) for locking the motor shaft (1), wherein the locking member (2) is mounted on one end of the motor shaft (1) and comprises a fixing ring (21) and a friction ring (22) having a first notch (221); The fixing ring (21) is plug-fitted with the friction ring (22); at least one of the inner ring of the fixing ring (21) and the outer ring of the friction ring (22) is arranged in a conical shape; the friction ring (22) is sleeved on the motor shaft (1) and is capable of holding the motor shaft (1) when the motor shaft (1) moves toward the fixing ring (21).
2. A motor structure with a one-way self-locking function according to claim 1, characterized in that: The outer ring of the friction ring (22) is arranged in a cone shape.
3. The motor structure with one-way self-locking function according to claim 2, characterized in that: The inner ring of the fixing ring (21) is arranged in a conical shape, and the inner conical surface can fit with the outer conical surface of the friction ring (22).
4. The motor structure with one-way self-locking function according to claim 1, characterized in that: It also comprises a limiting portion (4) for inserting and fitting the fixing ring (21) and the friction ring (22); the limiting portion (4) is mounted on the friction ring (22); and the fixing ring (21) is provided with a first fitting groove (211) for inserting the limiting portion (4).
5. The motor structure with one-way self-locking function according to claim 4, characterized in that: The limiting portion (4) is mounted on the fixing ring (21), and the friction ring (22) is provided with a second matching groove (222) for the limiting portion (4) to be inserted.
6. The motor structure with one-way self-locking function according to claim 1, characterized in that: It also includes a positioning ring (5) for fixing the friction ring (22); the positioning ring (5) is sleeved and fixed on the motor shaft (1), and its end surface abuts against the friction ring (22).
7. The motor structure with one-way self-locking function according to claim 6, characterized in that: The motor shaft (1) is provided with an annular groove (11), and the end surface of the positioning ring (5) abuts against the groove wall of the annular groove (11).
8. The motor structure with one-way self-locking function according to claim 7, characterized in that: The positioning ring (5) is provided with a second notch (51); or The positioning ring (5) comprises two arc-shaped positioning plates, and the two arc-shaped positioning plates are detachably connected.
9. A linear brake, characterized in that: It comprises a motor structure with a one-way self-locking function as described in any one of claims 1 to 8.
10. A household appliance, characterized in that: It comprises a motor structure with a one-way self-locking function as described in any one of claims 1 to 8.