Motor assembly applied to mechanical massage of automobile seat

Abstract

The invention discloses a motor assembly applied to mechanical massage of an automobile seat, the motor assembly comprises a driving motor, a reduction gearbox and a power output piece, the reduction gearbox comprises a box body and a box cover, and a speed reduction assembly is embedded in a containing cavity between the box body and the box cover; the speed reduction assembly comprises a first worm, a first worm gear, a second worm, a second worm gear, a third worm and a third worm gear; the first worm is fastened and sleeved on a power output shaft of the driving motor; the third worm and a power output shaft of the driving motor are arranged in parallel at an interval, the first worm gear and the second worm are rotationally installed on the box body through a mandrel, and the first worm is meshed with the first worm gear; the second worm gear is tightly sleeved on the third worm, and the second worm is meshed with the second worm gear; the third worm gear is arranged on the power output piece, the third worm is meshed with the third worm gear, and the power output shaft and the power output piece are located on the same side of the third worm. By means of the structural design, the self-locking device has the advantages of being novel in structural design, good in stability and reliability and high in self-locking capacity.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive seat massage devices, and particularly to a motor assembly applied to mechanical massage of automotive seats. Background Art

[0002] The Chinese invention patent application with the patent application number: 202211274336.8 and the patent name: Massage mechanism for vehicle-mounted massage seat and automotive seat including the same specifically discloses the following technical solutions. Specifically: A massage mechanism for a vehicle-mounted massage seat, the massage mechanism includes a massage head, a torsion spring damping mechanism, a hollow base, an inner rotor assembly and a driving mechanism. The massage head is connected to the inner rotor assembly through the torsion spring damping mechanism; the inner rotor assembly is installed in the base, so that the inner rotor assembly is connected to the chute on the inner wall surface of the base, and the driving mechanism is connected to the inner rotor assembly; the driving mechanism is used to drive the inner rotor assembly, so that the inner rotor assembly rotates along the chute, thereby realizing the rising or falling of the inner rotor assembly relative to the base; the driving mechanism includes a transmission rod and a motor. One end of the transmission rod is inserted into the connection hole at the bottom of the inner rotor, and the other end is connected to the motor; when the motor drives the transmission rod to rotate, the transmission rod drives the bearing roller to roll along the chute, thereby driving the inner rotor to move; the motor adopts a low-speed motor with a larger torque.

[0003] It should be noted that for the existing motor assembly applied to automotive seat massage devices, it has the following defects. Specifically: The self-locking force is insufficient, and the massage head cannot be effectively maintained at the required massage pressure position under the action of external force, and the massage head will move in the reverse direction under the action of a large external pressure, and the stability and reliability are relatively poor. Summary of the Invention

[0004] The purpose of the present invention is to provide a motor assembly applied to mechanical massage of automotive seats in view of the deficiencies of the prior art. The motor assembly applied to mechanical massage of automotive seats has a novel structural design, good stability and reliability, and strong self-locking ability.

[0005] To achieve the above object, the present invention is realized through the following technical solutions.

[0006] A motor assembly applied to mechanical massage of automotive seats includes a driving motor, a reduction gearbox, and a power output member. The reduction gearbox includes a box body and a box cover screwed and fastened to the box body. A receiving cavity is formed between the box body and the box cover, and a reduction component is embedded in the receiving cavity;

[0007] The outer shell of the driving motor is screwed and fastened to the box body, and the power output shaft of the driving motor extends into the receiving cavity;

[0008] The speed reduction assembly includes a first worm, a first worm gear, a second worm, a second worm gear, a third worm, and a third worm gear. The first worm is tightly sleeved on the power output shaft of the driving motor;

[0009] The third worm is arranged in parallel and at an interval with the power output shaft of the driving motor. The first worm gear and the second worm are rotationally installed on the box body through a core shaft. The first worm gear and the second worm are coaxially arranged and rotate synchronously. The core shaft is perpendicular to the power output shaft of the driving motor and the third worm respectively. The first worm meshes with the first worm gear; the second worm gear is tightly sleeved on the third worm, and the second worm meshes with the second worm gear;

[0010] The third worm gear is arranged on the power output member, and the third worm meshes with the third worm gear. The power output shaft of the driving motor and the power output member are located on the same side of the third worm.

[0011] Wherein, a rotating member is embedded in the accommodating cavity, and the rotating member is rotationally installed on the box body through the core shaft;

[0012] The first worm gear is arranged at one end of the rotating member, and the second worm is arranged at the other end of the rotating member, and the first worm gear and the second worm are of an integral structure.

[0013] Wherein, the two end parts of the core shaft are circumferentially limited between the box body and the box cover;

[0014] The box body is respectively provided with first clamping grooves on two axial end sides of the core shaft, and first wear-resistant sheets are respectively embedded and installed in the first clamping grooves. The end faces of the two end parts of the core shaft are respectively in contact with the first wear-resistant pads on the corresponding sides.

[0015] Wherein, the box body is provided with an inner wall mounting hole on the inner wall of the accommodating cavity, and the inner wall mounting hole opens towards the side of the power output shaft of the driving motor;

[0016] An elastic buffer pad, an output shaft wear-resistant pad, and a bearing are sequentially embedded in the inner wall mounting hole. The end part of the power output shaft extends into the inner wall mounting hole, and the end part of the power output shaft is rotationally installed on the box body through the bearing. The elastic buffer pad is in pressing contact with the end face of the power output shaft through the output shaft wear-resistant pad.

[0017] Wherein, the box body is provided with a second clamping groove on one end side of the third worm, and a second wear-resistant sheet is embedded and installed in the second clamping groove. The end face of the corresponding side of the third worm is in contact with the second wear-resistant pad;

[0018] The box body is provided with an internally threaded hole on the other end side of the third worm, and the internally threaded hole opens outwards and communicates with the accommodating cavity. A gap adjusting setscrew is screwed in the internally threaded hole; a positioning hole is provided on the inner end face of the gap adjusting setscrew, and an axial wear-resistant pad is positioned and installed in the positioning hole of the gap adjusting setscrew, and the axial wear-resistant pad is in contact with the end face of the corresponding side of the third worm.

[0019] Among them, the power output member includes a rod sleeve portion, and the third worm gear is disposed around the rod sleeve portion, and the rod sleeve portion and the third worm gear are of an integral structure;

[0020] An axially penetrating sleeve hole is formed in the core of the rod sleeve portion, a box body through hole axially aligned with the sleeve hole of the rod sleeve portion is formed in the box body, a box cover through hole axially aligned with the sleeve hole of the rod sleeve portion is formed in the box cover, one end portion of the rod sleeve portion is inserted into the box body through hole, and the other end portion of the rod sleeve portion is inserted into the box cover through hole.

[0021] Among them, the drive motor is a brushless motor.

[0022] Compared with the prior art, the present invention has the following beneficial effects. Specifically, the speed reduction assembly realizes speed reduction transmission through the first worm gear pair composed of the first worm and the first worm gear, the second worm gear pair composed of the second worm and the second worm gear, and the third worm gear pair composed of the third worm and the third worm gear. Since each worm gear pair has a self-locking ability respectively, the above triple worm gear pair combination structure can realize a triple self-locking function, that is, the speed reduction assembly of the present invention has a very high self-locking force. The above triple self-locking structure can effectively enable the massage head to effectively maintain at the required massage pressure position under the action of an external force, and the problem that the massage head will not shift in the reverse direction under the action of a relatively large external pressure, and the stability and reliability are good. Therefore, the motor assembly applied to the mechanical massage of the car seat of the present invention has the advantages of novel structural design, good stability and reliability, and strong self-locking ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation to the present invention.

[0024] Figure 1 It is a schematic structural diagram of the present invention.

[0025] Figure 2 It is an exploded schematic diagram of the present invention.

[0026] Figure 3 It is an exploded schematic diagram of another perspective of the present invention.

[0027] Figure 4 It is a schematic sectional view of the present invention.

[0028] Figure 5 It is a schematic sectional view of another position of the present invention.

[0029] Figure 6 It is a schematic sectional view of yet another position of the present invention.

[0030] In Figures 1 to 6 it includes:

[0031] 1 - Driving motor; 11 - Power output shaft; 2 - Reducing gearbox; 21 - Housing; 211 - First card slot; 212 - Inner wall mounting hole; 213 - Second card slot; 214 - Internal thread hole; 215 - Housing through hole; 22 - Cover; 221 - Cover through hole; 23 - Accommodation cavity; 24 - Reduction component; 241 - First worm; 242 - First worm gear; 243 - Second worm; 244 - Second worm gear; 245 - Third worm; 246 - Third worm gear; 247 - Core shaft; 248 - Rotating part; 3 - Power output part; 31 - Rod sleeve part; 32 - Sleeve hole; 41 - First wear-resistant sheet; 42 - Second wear-resistant sheet; 51 - Elastic buffer pad; 52 - Output shaft wear-resistant pad; 53 - Bearing; 61 - Clearance adjustment set screw; 611 - Positioning hole; 62 - Axial wear-resistant pad. Specific embodiments

[0032] The present invention will be described below in conjunction with specific embodiments.

[0033] Example 1, as Figures 1 to 6 shown, a motor assembly applied to mechanical massage of vehicle seats includes a driving motor 1, a reducing gearbox 2, and a power output part 3. The reducing gearbox 2 includes a housing 21 and a cover 22 screwed and fastened to the housing 21. An accommodation cavity 23 is formed between the housing 21 and the cover 22, and a reduction component 24 is embedded in the accommodation cavity 23.

[0034] Among them, the outer shell of the driving motor 1 is screwed and fastened to the housing 21, and the power output shaft 11 of the driving motor 1 extends into the accommodation cavity 23.

[0035] Furthermore, as Figures 2 to 6 shown, the reduction component 24 includes a first worm 241, a first worm gear 242, a second worm 243, a second worm gear 244, a third worm 245, and a third worm gear 246. The first worm 241 is fixedly sleeved on the power output shaft 11 of the driving motor 1.

[0036] Specifically, as Figures 2 to 6 shown, the third worm 245 is arranged in parallel and spaced from the power output shaft 11 of the driving motor 1. The first worm gear 242 and the second worm 243 are rotatably mounted on the housing 21 through a core shaft 247. The first worm gear 242 and the second worm 243 are coaxially arranged and rotate synchronously. The core shaft 247 is perpendicular to both the power output shaft 11 of the driving motor 1 and the third worm 245. The first worm 241 meshes with the first worm gear 242; the second worm gear 244 is fixedly sleeved on the third worm 245, and the second worm 243 meshes with the second worm gear 244.

[0037] Further, a third worm gear 246 is disposed on the power output member 3. A third worm 245 meshes with the third worm gear 246. The power output shaft 11 of the drive motor 1 and the power output member 3 are located on the same side of the third worm 245.

[0038] It should be explained that the drive motor 1 is a brushless motor; the brushless motor can achieve a constant torque output, and thus the massage force can be more stable during massage.

[0039] It should be pointed out that the speed reduction assembly 24 of the first embodiment realizes speed reduction transmission through a first worm gear pair composed of a first worm 241 and a first worm gear 242, a second worm gear pair composed of a second worm 243 and a second worm gear 244, and a third worm gear pair composed of a third worm 245 and a third worm gear 246. The above triple worm gear pair combination structure can effectively improve the output torque of the drive motor 1. Moreover, since each worm gear pair has a self-locking ability respectively, the above triple worm gear pair combination structure can achieve a triple self-locking function, that is, the motor assembly applied to the mechanical massage of the car seat in the first embodiment has a very high self-locking force. The above triple self-locking structure can effectively keep the massage head at the required massage pressure position under the action of external force, and the massage head will not reverse and shift under the action of a large external pressure, and the stability and reliability are good.

[0040] It should be further pointed out that the core shaft 247 of the first embodiment is perpendicular to the power output shaft 11 of the drive motor 1 and the third worm 245 respectively, and the power output shaft 11 of the drive motor 1 and the power output member 3 are located on the same side of the third worm 245. The above structural design has a good compactness, a small volume and can effectively reduce the overall occupied space.

[0041] Based on the above situation, through the above structural design, the motor assembly applied to the mechanical massage of the car seat in the first embodiment has the advantages of novel structural design, good stability and reliability, and strong self-locking ability.

[0042] Embodiment 2, as Figure 2 、 Figure 3 and Figure 6 shown, the difference between the second embodiment and the first embodiment is that a rotating member 248 is embedded in the accommodation cavity 23, and the rotating member 248 is rotatably mounted on the box body 21 through the core shaft 247.

[0043] Wherein, the first worm gear 242 is disposed at one end of the rotating member 248, the second worm 243 is disposed at the other end of the rotating member 248, and the first worm gear 242 and the second worm 243 are of an integral structure.

[0044] In the second embodiment, the first worm wheel 242 and the second worm 243 are of an integral structure. This integral structure design can effectively ensure the accuracy of the synchronous rotation action of the first worm wheel 242 and the second worm 243, and can also improve the convenience of assembly.

[0045] Embodiment 3, as Figure 2 , Figure 3 and Figure 6 shown. The difference between the third embodiment and the second embodiment is that both ends of the core shaft 247 are circumferentially limited between the box body 21 and the box cover 22; the box body 21 is respectively provided with first card slots 211 on two axial end sides of the core shaft 247, and first wear-resistant pads 41 are respectively installed in the first card slots 211 in an embedded manner, and the end faces of both ends of the core shaft 247 are respectively in contact with the first wear-resistant pads on the corresponding sides.

[0046] It should be explained that the first wear-resistant pads in the third embodiment can be wear-resistant sheets made of high-strength carbon tool steel. The two first wear-resistant pads axially limit the core shaft 247. The reliability of this structural design is higher than that of the ball bearing 53 structure, and the service life is longer.

[0047] Embodiment 4, as Figure 2 , Figure 3 and Figure 5 shown. The difference between the fourth embodiment and the first embodiment is that the box body 21 is provided with an inner wall mounting hole 212 on the inner wall of the accommodation cavity 23 and opening towards the power output shaft 11 side of the driving motor 1.

[0048] Among them, an elastic buffer pad 51, an output shaft wear-resistant pad 52 and a bearing 53 are sequentially installed in the inner wall mounting hole 212. The end of the power output shaft 11 extends into the inner wall mounting hole 212, and the end of the power output shaft 11 is rotationally installed on the box body 21 through the bearing 53. The elastic buffer pad 51 is in pressing contact with the end face of the power output shaft 11 through the output shaft wear-resistant pad 52.

[0049] It should be noted that due to the elastic force of the elastic buffer pad 51, the end face of the power output shaft 11 of the driving motor 1 is in pressing contact with the output shaft wear-resistant pad 52. The power output shaft 11 supporting structure composed of the elastic buffer pad 51, the output shaft wear-resistant pad 52 and the bearing 53 can effectively reduce the axial play of the power output shaft 11 of the driving motor 1, and thus improve the stability of the driving motor 1 during operation.

[0050] Embodiment 5, as Figures 2 to 4 shown. The difference between the fifth embodiment and the first embodiment is that the box body 21 is provided with a second card slot 213 on one end side of the third worm 245, a second wear-resistant pad 42 is installed in the second card slot 213 in an embedded manner, and the end face on the corresponding side of the third worm 245 is in contact with the second wear-resistant pad.

[0051] Wherein, an internally threaded hole 214 which is open outward and communicates with the accommodation cavity 23 is formed in the other end side of the box body 21 for the third worm 245, and an internal thread adjusting setscrew 61 is screwed in the internally threaded hole 214; a positioning hole 611 is formed in the inner end surface of the internal thread adjusting setscrew 61, and an axial wear-resistant pad 62 is positioned and installed in the positioning hole 611 of the internal thread adjusting setscrew 61, and the axial wear-resistant pad 62 is in contact with the end surface of the corresponding side of the third worm 245.

[0052] During operation, by rotating the internal thread adjusting setscrew 61, the internal thread adjusting setscrew 61 can axially move relative to the third worm 245, so that the internal thread adjusting setscrew 61 and the axial wear-resistant pad 62 move along the axis of the third worm 245, so as to ensure that the axial wear-resistant pad 62 keeps pressing contact with the end surface of the third worm 245.

[0053] When the third worm 245 has axial looseness, the user can rotate the internal thread adjusting setscrew 61 to make the axial wear-resistant pad 62 keep pressing contact with the end surface of the third worm 245, so that the axial impact resistance of the product can be effectively improved.

[0054] Embodiment Six, as Figure 2 、 Figure 3 and Figure 5 shown, the difference between this Embodiment Six and Embodiment One is that: the power output member 3 includes a rod sleeve portion 31, the third worm gear 246 is arranged on the periphery of the rod sleeve portion 31, and the rod sleeve portion 31 and the third worm gear 246 are of an integral structure.

[0055] Wherein, an axially penetrating sleeve hole 32 is formed in the core of the rod sleeve portion 31, the box body 21 is provided with a box body through hole 215 axially aligned with the sleeve hole 32 of the rod sleeve portion 31, the box cover 22 is provided with a box cover through hole 221 axially aligned with the sleeve hole 32 of the rod sleeve portion 31, one end of the rod sleeve portion 31 is inserted into the box body through hole 215, and the other end of the rod sleeve portion 31 is inserted into the box cover through hole 221.

[0056] The above content is only the preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A motor assembly for mechanical massage of automobile seats, comprising a driving motor (1), a reduction box (2), and a power output member (3); the reduction box (2) comprising a housing (21), a housing cover (22) screwed to the housing (21), a receiving cavity (23) formed between the housing (21) and the housing cover (22), and a reduction assembly (24) embedded in the housing cavity (23); The outer shell of the driving motor (1) is screwed and fastened to the box body (21), and the power output shaft (11) of the driving motor (1) extends into the accommodating cavity (23); Features: The reduction assembly (24) comprises a first worm (241), a first worm wheel (242), a second worm (243), a second worm wheel (244), a third worm (245) and a third worm wheel (246); the first worm (241) is fixedly mounted on a power output shaft (11) of the drive motor (1); The third worm (245) is arranged in parallel and spaced apart from the power output shaft (11) of the drive motor (1); the first worm wheel (242) and the second worm (243) are rotatably mounted on the housing (21) via a core shaft (247); the first worm wheel (242) and the second worm (243) are coaxially arranged and rotate synchronously with each other; the core shaft (247) is perpendicular to the power output shaft (11) of the drive motor (1) and the third worm (245), respectively; the first worm (241) is meshed with the first worm wheel (242); the second worm wheel (244) is fixedly mounted on the third worm (245), and the second worm (243) is meshed with the second worm wheel (244); The third worm gear (246) is arranged on the power output member (3), the third worm (245) is meshed with the third worm gear (246), and the power output shaft (11) of the drive motor (1) and the power output member (3) are located on the same side of the third worm (245).

2. The motor assembly for mechanical massage of automobile seats according to claim 1, characterized in that: A rotating member (248) is embedded in the accommodating cavity (23), and the rotating member (248) is rotatably mounted on the box body (21) via the core shaft (247); The first worm wheel (242) is arranged at one end of the rotating member (248), the second worm (243) is arranged at the other end of the rotating member (248), and the first worm wheel (242) and the second worm (243) are an integrated structure.

3. The motor assembly for mechanical massage of automobile seats according to claim 2, characterized in that: The two ends of the core shaft (247) are circumferentially limited between the box body (21) and the box cover (22); The box body (21) is provided with first clamping grooves (211) at two axial end sides of the core shaft (247), and a first wear-resistant sheet (41) is respectively inserted and mounted in each first clamping groove (211). The end surfaces of both ends of the core shaft (247) are respectively in contact with the first wear-resistant pads on the corresponding side.

4. The motor assembly for mechanical massage of automobile seats according to claim 1, characterized in that: The box body (21) is provided with an inner wall mounting hole (212) on the inner wall of the accommodating cavity (23), the inner wall mounting hole (212) opening toward the power output shaft (11) of the drive motor (1); The inner wall mounting hole (212) is embedded with an elastic buffer pad (51), an output shaft wear pad (52) and a bearing (53) arranged in sequence. The end of the power output shaft (11) extends into the inner wall mounting hole (212), and the end of the power output shaft (11) is rotatably mounted on the box body (21) through the bearing (53). The elastic buffer pad (51) is in pressure contact with the end surface of the power output shaft (11) through the output shaft wear pad (52).

5. The motor assembly for mechanical massage of automobile seats according to claim 1, characterized in that: The box body (21) is provided with a second slot (213) at one end of the third worm (245), a second wear-resistant pad (42) is embedded in the second slot (213), and the end surface of the corresponding side of the third worm (245) is in contact with the second wear-resistant pad; The housing (21) is provided with an internal threaded hole (214) at the other end side of the third worm (245), which is open outward and communicates with the accommodating chamber (23); a gap adjustment screw (61) is threadedly installed in the internal threaded hole (214); a positioning hole (611) is provided on the inner end surface of the gap adjustment screw (61); an axial wear-resistant pad (62) is positioned and installed in the positioning hole (611) of the gap adjustment screw (61); the axial wear-resistant pad (62) contacts the end surface of the corresponding side of the third worm (245).

6. The motor assembly for mechanical massage of automobile seats according to claim 1, characterized in that: The power output member (3) comprises a rod sleeve portion (31), the third worm gear (246) is arranged on the periphery of the rod sleeve portion (31), and the rod sleeve portion (31) and the third worm gear (246) are an integral structure; The core of the rod sleeve portion (31) is provided with a sleeve hole (32) that penetrates axially, the box body (21) is provided with a box body through hole (215) that is axially aligned with the sleeve hole (32) of the rod sleeve portion (31), the box cover (22) is provided with a box cover through hole (221) that is axially aligned with the sleeve hole (32) of the rod sleeve portion (31), one end of the rod sleeve portion (31) is inserted into the box body through hole (215), and the other end of the rod sleeve portion (31) is inserted into the box cover through hole (221).

7. The motor assembly for mechanical massage of automobile seats according to claim 1, characterized in that: The driving motor (1) is a brushless motor.

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