Long-service-life linear vibration mechanism based on rotary motor

Abstract

The utility model belongs to the technical field of force feedback and touch simulation, and particularly relates to a long-service-life linear vibration mechanism based on a rotary motor, which comprises the rotary motor, an eccentric wheel and a balancing weight, the eccentric wheel is fixedly connected with a motor shaft of the rotary motor, a first rectangular groove for accommodating the eccentric wheel is formed in the lower end face of the balancing weight, and a second rectangular groove is formed in the lower end face of the balancing weight. The balancing weight is supported in a floating mode through more than one pair of elastic pieces, and compared with the prior art, two or more supporting balls are installed on the lower end face of the balancing weight, and the supporting balls directly or indirectly abut against the upper end face of the rotary motor. And the balancing weight is elastically connected with the shell of the rotary motor through more than one pair of elastic sheets. Compared with the prior art, the supporting balls are installed on the lower end face of the balancing weight to assist in bearing the weight of the balancing weight, the load of the elastic piece is effectively reduced, and then the service life of the linear vibration mechanism is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of force feedback and tactile simulation, and particularly refers to a linear vibration mechanism based on a rotary motor and with a long service life. Background Art

[0002] With the rapid development of technology, virtual reality (VR), augmented reality (AR), and the gaming industry are rapidly becoming important forces driving the development of new human-computer interaction technologies. In these fields, force feedback and tactile simulation technologies play a crucial role. They achieve a highly realistic tactile experience by transmitting tactile simulation signals to a vibration motor in the form of pulse width modulation (PWM), and then the vibration motor amplifies the signal and transmits it to the user's skin.

[0003] The core of the force feedback technology lies in the performance of the vibration motor, which not only needs to provide sufficient kinetic energy to simulate various tactile effects, but also requires a long service life and high reliability to meet the needs of different application scenarios. Especially in the field of automotive parts, the performance requirements for linear vibration mechanisms are more stringent. They need to provide a large amount of kinetic energy while ensuring a long service life and high reliability.

[0004] However, there are some limitations in the existing linear vibration mechanisms. For example, the patent CN217087672U earlier disclosed by the applicant of the present utility model discloses a linear vibration mechanism based on a rotary motor. While the elastic sheet supports the counterweight block, it also needs to bear the lateral shear force generated by the rotation of the eccentric wheel. This design causes the elastic sheet to be easily fatigued and damaged, thus limiting the durability and service life of the entire mechanism. Summary of the Utility Model

[0005] Aiming at the deficiencies of the existing technology, the present utility model aims to propose a new type of linear vibration mechanism, which solves the defects of the existing mechanism in terms of durability through innovative design, and at the same time meets the market's demand for a high-kinetic-energy and long-life linear vibration mechanism. The present utility model significantly improves the stability and durability of the mechanism by optimizing the support structure of the elastic sheet and the design of the counterweight block, making it more suitable for high-end application fields such as automotive parts. For this purpose, the technical solution adopted by the present utility model is as follows:

[0006] A linear vibration mechanism based on a rotary motor and with a long service life, comprising a rotary motor, an eccentric wheel and a counterweight. The eccentric wheel is fixedly connected to the motor shaft of the rotary motor. A first rectangular groove for accommodating the eccentric wheel is formed on the lower end surface of the counterweight. The counterweight is floatingly supported by more than one pair of elastic sheets. Different from the prior art, two or more support balls are installed on the lower end surface of the counterweight, and the support balls are directly or indirectly abutted against the upper end surface of the rotary motor; the counterweight is elastically connected to the housing of the rotary motor through more than one pair of elastic sheets.

[0007] Further, a second rectangular groove is formed in the middle of the bottom wall of the first rectangular groove. The length direction of the second rectangular groove is orthogonal to the length direction of the first rectangular groove. The protruding part of the motor shaft exceeding the eccentric wheel enters the second rectangular groove and is in transition fit or clearance fit with it.

[0008] Further, through the support of the support balls, there is a distance between the bottom wall of the second rectangular groove and the upper end surface of the protruding part of the motor shaft.

[0009] Further, the protruding part of the motor shaft is in micro-clearance fit or transition fit with the side wall of the second rectangular groove; or, a shaft end sleeve with self-lubricating characteristics is sleeved on the protruding part of the motor shaft, and the shaft end sleeve is in micro-clearance fit or transition fit with the side wall of the second rectangular groove.

[0010] Further, a spherical socket is formed on the lower end surface of the counterweight. After the support ball is placed in the spherical socket, the opening edge of the spherical socket is inwardly rolled by a cold working hardening process to form a retaining edge.

[0011] Further, through the support of the support balls, there is a distance between the bottom wall of the first rectangular groove and the top surface of the eccentric wheel.

[0012] Further, the two long side surfaces of the first rectangular groove are in transition fit or micro-clearance fit with the eccentric wheel; or, a bearing is sleeved on the eccentric wheel, and the two long side surfaces of the first rectangular groove are in transition fit or micro-clearance fit with the outer circular surface of the bearing.

[0013] Further, the bearing is a sliding bearing or a ball bearing.

[0014] Furthermore, the upper ends of a pair or more of the elastic pieces are directly or respectively fixedly connected to the two long side edges of the first rectangular groove of the counterweight block through a spacer block; a vibration output ring is sleeved on the housing of the rotary motor, and a radial set screw is screwed to the vibration output ring and abuts against the housing of the rotary motor to lock the axial position of the vibration output ring; a long hole is opened along the axis of the vibration output ring corresponding to a pair or more of the elastic pieces, the lower ends of the elastic pieces pass through the long hole, and a gasket is also inserted outside the elastic pieces in the long hole, and a radial set screw is screwed to the vibration output ring and abuts against the gasket to fix the lower ends of the elastic pieces.

[0015] Compared with the prior art, the beneficial technical effects of the present utility model are as follows:

[0016] Improve durability: By installing support balls on the lower end face of the counterweight block to directly bear the weight of the counterweight block, the elastic pieces do not need to bear the load, thereby extending the service life of the entire linear vibration mechanism.

[0017] Enhance structural stability: The use of support balls not only reduces the load on the elastic pieces but also plays a role in limiting the counterweight block, enhancing the stability of the entire mechanism and reducing structural deformation or damage caused by vibration.

[0018] Improve reliability: The design of the entire mechanism reduces potential failure points, improving the overall reliability and performance consistency.

[0019] Wide adaptability: Since the design of the linear vibration mechanism of the present utility model considers various application scenarios, its adjustability enables the mechanism to adapt to different load and motion requirements, having wide adaptability.

[0020] Easy maintenance: The optimized design reduces the complexity of the mechanism, making it easier to maintain and replace components, and reducing maintenance costs.

[0021] These technical effects work together, making the linear vibration mechanism of the present utility model superior to the prior art in terms of performance, durability, energy efficiency, and reliability, meeting the market demand for high-performance linear vibration mechanisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the present utility model.

[0023] Figure 2 is Figure 1 the top view of

[0024] Figure 3 is Figure 2 the sectional view taken along line A-A of

[0025] Figure 4 is Figure 3Partial enlarged view at position C in the figure.

[0026] Figure 5 is Figure 2 a sectional view taken along line B-B of

[0027] Figure 6 is a component separation diagram of the present utility model.

[0028] Reference numerals in the figure: slewing motor - 10, motor shaft - 11, protrusion - 111, elastic sheet - 20, eccentric wheel - 40, bearing - 50, counterweight - 60, first rectangular groove - 61, second rectangular groove - 62, long side surface - 621, ball socket - 63, flange - 64, support ball - 70, shaft end sleeve - 80, vibration output ring - 90, radial set screw - 91, long slot - 92, gasket - 93. Detailed implementation manners

[0029] It should be noted that the following detailed description is exemplary and is intended to provide further illustration of the present utility model. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs.

[0030] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present utility model. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] As Figures 1-5 shown, a linear vibration mechanism, a long - life linear vibration mechanism based on a slewing motor, includes a slewing motor 10, an eccentric wheel 40, and a counterweight 60. The eccentric wheel 40 is fixedly connected to the motor shaft 11 of the slewing motor 10. The lower end surface of the counterweight 60 is provided with a first rectangular groove 61 for accommodating the eccentric wheel 40. The counterweight 60 is floatingly supported by a pair of elastic sheets 20. Two support balls 70 are installed on the lower end surface of the counterweight 60, and the support balls 70 are directly in contact with the upper end surface of the slewing motor 10. The counterweight 60 is elastically connected to the housing of the slewing motor 10 through a pair of elastic sheets 20. A remarkable feature of the support ball is the exposure of its spherical shape, which enables the support ball 70 to freely rotate in any direction in the horizontal plane.

[0032] When the rotary motor 10 operates, the motor shaft 11 drives the eccentric wheel 40 to rotate. Due to the eccentricity of the eccentric wheel 40, its rotation generates a periodic thrust force, which is transmitted to the counterweight 60 through the first rectangular groove 61. The counterweight 60 is subjected to the thrust force generated by the eccentric wheel 40 and starts to reciprocate, generating linear vibration. The supporting ball 70 rolls on the upper end surface of the rotary motor 10, providing planar freedom and allowing the counterweight 60 to move linearly in a direction perpendicular to the motor shaft 11. If it is necessary to adjust the amplitude of vibration, the eccentricity of the eccentric wheel 40 can be adjusted. If it is necessary to adjust the frequency, it can be achieved by changing the rotational speed of the rotary motor.

[0033] In another preferred embodiment, a second rectangular groove 62 is formed in the middle of the bottom wall of the first rectangular groove 61. The length direction of the second rectangular groove 62 is orthogonal to the length direction of the first rectangular groove 61. The protruding portion 111 of the motor shaft 11 that extends beyond the eccentric wheel 40 enters the second rectangular groove 62 and is in transitional fit or clearance fit with it. This design can provide additional freedom restrictions in a direction perpendicular to the first vibration direction, which helps to control the movement of the counterweight 60 and improve the consistency and accuracy of vibration. The design of the second rectangular groove 62 helps to reduce the lateral force generated by the counterweight 60 on the elastic piece 20 during vibration, because the protruding portion 111 of the motor shaft 11 provides additional guiding in the second rectangular groove 62. The second rectangular groove 62 can improve the positioning accuracy of the counterweight 60 and ensure that it maintains the correct position and direction during vibration. By restricting the movement of the protruding portion 111 of the motor shaft 11 in the second rectangular groove 62, the swing or offset during vibration can be reduced, enhancing the structural stability of the entire vibration mechanism. This design helps to extend the service life of the entire vibration mechanism.

[0034] In another preferred embodiment, through the support of the support ball 70, there is a gap between the bottom wall of the first rectangular groove 61 and the top surface of the eccentric wheel 40; through the support of the support ball 70, there is a gap between the bottom wall of the second rectangular groove 62 and the upper end surface of the protrusion 111 of the motor shaft 11. The protrusion 111 of the motor shaft 11 and the side wall of the second rectangular groove 62 are slightly clearance matched or transition matched; or, the protrusion 111 of the motor shaft 11 is sleeved with an end sleeve 80, the material of which can be PTEF or other materials with self-lubricating properties, and the end sleeve 80 and the side wall of the second rectangular groove 62 are slightly clearance matched or transition matched. A certain distance is maintained between the bottom wall of the second rectangular groove 62 and the protrusion 111 of the motor shaft 11. This design can avoid direct contact, thereby reducing friction and wear. A micro-clearance fit or transition fit is adopted between the protrusion 111 of the motor shaft 11 and the side wall of the second rectangular groove 62. The micro-clearance fit allows a certain degree of movement while maintaining a low friction coefficient. The purpose of sleeve-mounted shaft end sleeve 80 on the protruding portion 111 of the motor shaft 11 is to reduce friction. The shaft end sleeve 80 is fitted with a micro-clearance or transition fit with the side wall of the second rectangular groove 62, and the low friction characteristics of the shaft end sleeve are utilized to further reduce the friction during the operation of the mechanism. Due to the reduction in friction, the unexpected vibration and heat generated by the mechanism during operation will also be reduced accordingly, which helps to maintain the stability of the mechanism and extend the service life of the components. Reducing friction means that less energy is required to produce the same amount of vibration, thereby improving the energy efficiency of the entire vibration mechanism. The design that reduces friction helps to reduce wear on components, extend maintenance cycles, and reduce maintenance costs. By reducing friction during the movement of the motor shaft 11, the operating accuracy and reliability of the vibration mechanism can be improved.

[0035] In another preferred embodiment, a ball socket 63 is provided on the lower end surface of the counterweight block 60, and after the support ball 70 is placed in the ball socket 63, the opening edge of the ball socket 63 is pressed inwardly through a cold working hardening process to form a retaining edge 64. The retaining edge 64 formed by the cold working hardening process can effectively prevent the support ball 70 from falling out, thereby improving the reliability of the ball being fixed in the ball socket 63; the retaining edge 64 formed by the cold working hardening enhances the structural integrity of the ball socket 63, thereby improving the durability and stability of the entire counterweight block 60. Since the formation of the retaining edge 64 is completed during the manufacturing process of the ball socket 63, this reduces additional assembly and adjustment work, thereby simplifying the entire assembly process. The simple combination of the ball socket 63 and the support ball enhances its durability, which helps to extend the service life of the entire vibration mechanism.

[0036] In another preferred embodiment, the two long side faces 621 of the first rectangular groove 61 are in transitional fit or micro-clearance fit with the eccentric wheel 40; alternatively, a bearing 50 is sleeved outside the eccentric wheel 40, and the two long side faces 621 of the first rectangular groove 61 are in transitional fit or micro-clearance fit with the outer circular surface of the bearing 50. The bearing 50 shown in the attached drawing is a ball bearing, and of course a self-lubricating sliding bearing is also acceptable; the transitional fit or micro-clearance fit between the long side face 621 of the first rectangular groove 61 and the eccentric wheel 40 or the bearing 50 can ensure precise positioning and stable operation; the micro-clearance fit reduces the friction between the eccentric wheel 40 or the bearing 50 and the first rectangular groove 61, which helps to reduce energy consumption and improve the operating efficiency of the mechanism. Through the transitional fit or micro-clearance fit, the stability of the eccentric wheel 40 in the first rectangular groove 61 can be improved, and the swing or offset during vibration can be reduced. A bearing 50 is sleeved outside the eccentric wheel 40, and this fitting method can provide additional protection for the bearing, prevent direct wear or damage, reduce friction and improve stability, and reduce the frequency of maintenance and replacement. Reducing friction and improving stability helps to reduce the noise generated during the operation of the mechanism and improve the working environment.

[0037] In another preferred embodiment, the upper ends of one or more pairs of the elastic pieces 20 are directly or respectively fixedly connected to the two long side sides of the first rectangular groove 61 of the counterweight 60 through spacer blocks 21; a vibration output ring 90 is sleeved on the housing of the rotary motor 10, and a radial set screw 91 is screwed to the vibration output ring 90 and abuts against the housing of the rotary motor 10 to lock the axial position of the vibration output ring 90; a long slot 92 is opened along the axis of the vibration output ring 90 corresponding to one or more pairs of the elastic pieces 20, the lower ends of the elastic pieces 20 pass through the long slot 92, and a gasket 93 is inserted outside the elastic pieces 20 in the long slot 92, and the radial set screw 91 is screwed to the vibration output ring 90 and abuts against the gasket 93 to fix the lower ends of the elastic pieces 20. The vibration output ring 90 is sleeved on the housing of the rotary motor 10 and is fixed by screwing the radial set screw 91, ensuring that the axial position of the vibration output ring 90 is accurately locked, so as to ensure the stability and consistency of vibration transmission. Through the long slot 92 and the gasket 93 on the vibration output ring 90, the effective working length of the elastic piece 20 can be adjusted to achieve fine adjustment of the vibration amplitude and the resilience. The use of the gasket 93 helps to reduce vibration and absorb energy, reduces the impact on the fixed structure during vibration, and prolongs the service life of the elastic piece and the vibration output ring. The gasket 93 plays a protective role when fixing the elastic piece 20, preventing deformation or damage of the elastic piece caused by improper fastening. The fixing method of the elastic piece 20 simplifies the maintenance and replacement process and facilitates quick adjustment or replacement of components. The vibration output ring 90 also serves as a fixing seat for the elastic piece, providing a stable fixing platform.

[0038] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A rotary motor-based, long-life linear vibration mechanism, comprising a rotary motor (10), an eccentric wheel (40) and a counterweight (60), wherein the eccentric wheel (40) is fixedly connected to a motor shaft (11) of the rotary motor (10), and a first rectangular groove (61) for accommodating the eccentric wheel (40) is provided on a lower end surface of the counterweight (60), characterized in that: Two or more supporting balls (70) are installed on the lower end surface of the counterweight block (60), and the supporting balls (70) are directly or indirectly in contact with the upper end surface of the rotary motor (10); the counterweight block (60) is elastically connected to the housing of the rotary motor (10) via one or more pairs of spring sheets (20).

2. A rotary motor-based, long-life linear vibration mechanism according to claim 1, characterized in that: A second rectangular groove (62) is provided in the middle of the bottom wall of the first rectangular groove (61), the length direction of the second rectangular groove (62) being orthogonal to the length direction of the first rectangular groove (61), and the motor shaft (11) extends beyond the protrusion (111) of the eccentric wheel (40) and enters into the second rectangular groove (62) and forms a transition fit or a clearance fit therewith.

3. A rotary motor-based, long-life linear vibration mechanism according to claim 2, characterized in that: Through the support of the supporting balls (70), a gap exists between the bottom wall of the second rectangular groove (62) and the upper end surface of the protruding portion (111) of the motor shaft (11).

4. A rotary motor-based, long-life linear vibration mechanism according to claim 2, characterized in that: The protruding portion (111) of the motor shaft (11) has a micro-clearance fit or a transition fit with the side wall of the second rectangular groove (62); or, the protruding portion (111) of the motor shaft (11) is sleeved with a shaft end sleeve (80) having a self-lubricating property, and the shaft end sleeve (80) has a micro-clearance fit or a transition fit with the side wall of the second rectangular groove (62).

5. A rotary motor-based, long-life linear vibration mechanism according to claim 1, characterized in that: The lower end surface of the counterweight block (60) is provided with a ball socket (63), and after the supporting ball (70) is placed in the ball socket (63), the opening edge of the ball socket (63) is pressed inwardly through a cold working hardening process to form a retaining edge (64).

6. A rotary motor-based, long-life linear vibration mechanism according to claim 1, characterized in that: Through the support of the supporting balls (70), a distance exists between the bottom wall of the first rectangular groove (61) and the top surface of the eccentric wheel (40).

7. A rotary motor-based, long-life linear vibration mechanism according to claim 1, characterized in that: The two long side surfaces (621) of the first rectangular groove (61) are in transitional fit or slight clearance fit with the eccentric wheel (40); or, a bearing (50) is arranged outside the eccentric wheel (40), and the two long side surfaces (621) of the first rectangular groove (61) are in transitional fit or slight clearance fit with the outer cylindrical surface of the bearing (50).

8. A rotary motor-based, long-life linear vibration mechanism according to claim 7, characterized in that: The bearing (50) is a sliding bearing or a ball bearing.

9. A rotary motor-based, long-life linear vibration mechanism according to any one of claims 1 to 7, characterized in that: The upper ends of the pair of spring sheets (20) are respectively fixedly connected to the two long sides of the first rectangular groove (61) of the counterweight block (60) directly or through a spacer block (21); a vibration output ring (90) is sleeved on the housing of the rotary motor (10); a radial top screw (91) is screwed to the vibration output ring (90) and abuts against the housing of the rotary motor (10) to lock the axial position of the vibration output ring (90); a long hole (92) is provided along the axial direction of the vibration output ring (90) and corresponds to the pair of spring sheets (20); the lower end of the spring sheet (20) passes through the long hole (92); a gasket (93) is inserted in the long hole (92) and outside the spring sheet (20); the radial top screw (91) is screwed to the vibration output ring (90) and abuts against the gasket (93) to fix the lower end of the spring sheet (20).

Images