A motor assembly applied to mechanical massage of automobile seat

Abstract

The application discloses a motor assembly applied to mechanical massage of an automobile seat, which comprises a driving motor, a speed reducer, and a power output part, the speed reducer comprises a box body and a box cover, and a reduction assembly is embedded in a containing cavity between the box body and the box cover; the reduction assembly comprises a first worm, a first worm wheel, a second worm, a second worm wheel, a third worm and a third worm wheel, the first worm is fastened and sleeved on a power output shaft of the driving motor; the third worm is arranged in parallel with the power output shaft of the driving motor at intervals, the first worm wheel and the second worm are rotatably installed on the box body through a core shaft, and the first worm is engaged with the first worm wheel; the second worm wheel is fastened and sleeved on the third worm, the second worm is engaged with the second worm wheel; the third worm wheel is arranged on the power output part, the third worm is engaged with the third worm wheel, and the power output shaft and the power output part are located on the same side of the third worm. Through the above structural design, the motor assembly has the advantages of novel structural design, good stability and reliability, and strong self-locking capacity.

Description

Technical Field

[0001] This invention relates to the field of automotive seat massage devices, and more particularly to a motor assembly for use in mechanical massage of automotive seats. Background Technology

[0002] The Chinese invention patent application with patent number 202211274336.8 and patent title "Massage Mechanism for Car Massage Seat and Car Seat Including the Same" specifically discloses the following technical solution: A massage mechanism for a car massage seat, comprising a massage head, a torsion spring damping mechanism, a hollow base, an inner rotor assembly, and a drive mechanism. The massage head is connected to the inner rotor assembly via the torsion spring damping mechanism. The inner rotor assembly is installed inside the base, connecting to a sliding groove on the inner wall of the base. The drive mechanism is connected to the inner rotor assembly. The drive mechanism drives the inner rotor assembly, causing it to rotate along the sliding groove, thereby achieving the upward or downward movement of the inner rotor assembly relative to the base. The drive mechanism includes a transmission rod and a motor. One end of the transmission rod is inserted into a connecting 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 sliding groove, thereby driving the inner rotor to move. The motor is a low-speed motor with higher torque.

[0003] It should be noted that the existing motor components used in car seat massage devices have the following defects: insufficient self-locking force, which makes it impossible for the massage head to be effectively maintained at the required massage pressure position under external force, and the massage head will shift in the opposite direction under greater external pressure, resulting in poor stability and reliability. Summary of the Invention

[0004] The purpose of this invention is to provide a motor assembly for mechanical massage of car seats, which addresses the shortcomings of existing technologies. This motor assembly for mechanical massage of car seats has a novel structural design, good stability and reliability, and strong self-locking capability.

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

[0006] A motor assembly for mechanical massage of car seats includes a drive motor, a gearbox, and a power output component. The gearbox includes a housing and a cover screwed onto the housing. A receiving cavity is formed between the housing and the cover, and a reduction assembly is embedded in the receiving cavity.

[0007] The drive motor housing is screwed and fastened to the housing, and the drive motor's power output shaft extends into the receiving cavity;

[0008] The reduction gear assembly includes a first worm, a first worm wheel, a second worm, a second worm wheel, a third worm, and a third worm wheel. The first worm is fastened to the power output shaft of the drive motor.

[0009] The third worm is arranged parallel to and spaced apart from the power output shaft of the drive motor. The first worm wheel and the second worm are rotatably mounted on the housing via a spindle. The first worm wheel and the second worm are arranged coaxially and rotate synchronously. The spindle is perpendicular to the power output shaft of the drive motor and the third worm, respectively. The first worm meshes with the first worm wheel. The second worm wheel is fastened to the third worm, and the second worm meshes with the second worm wheel.

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

[0011] The accommodating cavity is fitted with a rotating component, which is rotatably mounted on the housing via the spindle.

[0012] The first worm gear is disposed at one end of the rotating component, and the second worm is disposed at the other end of the rotating component, and the first worm gear and the second worm are integral structures.

[0013] The two ends of the mandrel are circumferentially limited between the housing and the housing cover;

[0014] The housing has a first slot on each of the two axial ends of the spindle, and a first wear-resistant pad is embedded in each first slot. The end faces of the two ends of the spindle contact the first wear-resistant pads on the corresponding sides.

[0015] The housing has an inner wall mounting hole on the inner wall of the accommodating cavity that opens toward the power output shaft of the drive motor.

[0016] An elastic buffer pad, an output shaft wear-resistant pad, and a bearing are sequentially arranged in the mounting hole on the inner wall. The end of the power output shaft extends into the mounting hole on the inner wall and is rotatably mounted on the housing via the bearing. The elastic buffer pad is in contact with the end face of the power output shaft through the output shaft wear-resistant pad.

[0017] The housing has a second slot at one end of the third worm gear, and a second wear-resistant pad is embedded in the second slot. The end face of the third worm gear on the corresponding side contacts the second wear-resistant pad.

[0018] The housing has an outwardly opening internal threaded hole on the other end of the third worm gear that communicates with the accommodating cavity. A clearance adjustment set screw is threaded into the internal threaded hole. A positioning hole is provided on the inner end face of the clearance adjustment set screw. An axial wear-resistant pad is positioned and installed in the positioning hole of the clearance adjustment set screw. The axial wear-resistant pad contacts the end face of the corresponding side of the third worm gear.

[0019] The power output component includes a rod sleeve, and the third worm gear is disposed on the periphery of the rod sleeve, and the rod sleeve and the third worm gear are an integral structure.

[0020] The core of the rod sleeve has an axially penetrating sleeve hole, the box body has a box body through hole that is axially aligned with the sleeve hole of the rod sleeve, and the box cover has a box cover through hole that is axially aligned with the sleeve hole of the rod sleeve. One end of the rod sleeve is inserted into the box body through hole, and the other end of the rod sleeve is inserted into the box cover through hole.

[0021] The drive motor is a brushless motor.

[0022] Compared with existing technologies, the present invention has the following beneficial effects: Specifically, the reduction assembly achieves speed reduction transmission through a first worm gear pair composed of a first worm and a first worm wheel, a second worm gear pair composed of a second worm and a second worm wheel, and a third worm gear pair composed of a third worm and a third worm wheel. Since each worm gear pair has a self-locking capability, the above-mentioned triple worm gear pair combination structure can achieve a triple self-locking function. That is, the reduction assembly of the present invention has a very high self-locking force. The above-mentioned triple self-locking structure can effectively keep the massage head at the required massage pressure position under external force, and the massage head will not shift backward under large external pressure, resulting in good stability and reliability. Therefore, the motor assembly of the present invention applied to automotive seat mechanical massage has the advantages of novel structural design, good stability and reliability, and strong self-locking capability. Attached Figure Description

[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 on the present invention.

[0024] Figure 1 This is a schematic diagram of the structure of the present invention.

[0025] Figure 2 This is an exploded view of the present invention.

[0026] Figure 3 This is an exploded view of the present invention from another perspective.

[0027] Figure 4 This is a cross-sectional schematic diagram of the present invention.

[0028] Figure 5 This is a cross-sectional view of another location in the present invention.

[0029] Figure 6 This is a cross-sectional schematic diagram of another location of the present invention.

[0030] exist Figures 1 to 6 This includes:

[0031] 1-Drive motor; 11-Power output shaft; 2-Reduction gearbox; 21-Gearbox body; 211-First slot; 212-Inner wall mounting hole; 213-Second slot; 214-Internal threaded hole; 215-Gearbox body through hole; 22-Gearbox cover; 221-Gearbox cover through hole; 23-Accommodation cavity; 24-Reduction assembly; 241-First worm; 242-First worm wheel; 243-Second worm; 244-Second worm wheel; 245-Third worm; 246-Third worm wheel; 247-Spindle; 248-Rotating component; 3-Power output component; 31-Rod sleeve; 32-Sleeve hole; 41-First wear-resistant plate; 42-Second wear-resistant plate; 51-Elastic buffer pad; 52-Output shaft wear-resistant pad; 53-Bearing; 61-Clearance adjustment screw; 611-Positioning hole; 62-Axial wear-resistant pad. Detailed Implementation

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

[0033] Example 1, as Figures 1 to 6 As shown, a motor assembly for mechanical massage of car seats includes a drive motor 1, a reduction gearbox 2, and a power output component 3. The reduction gearbox 2 includes a housing 21 and a cover 22 screwed onto the housing 21. A receiving cavity 23 is formed between the housing 21 and the cover 22, and a reduction assembly 24 is embedded in the receiving cavity 23.

[0034] The outer casing of the drive motor 1 is screwed and fastened to the housing 21, and the power output shaft 11 of the drive motor 1 extends into the accommodating cavity 23.

[0035] Furthermore, such as Figures 2 to 6 As shown, the reduction assembly 24 includes 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 fastened to the power output shaft 11 of the drive motor 1.

[0036] Specifically, such as Figures 2 to 6 As shown, the third worm 245 is arranged parallel to 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 spindle 247. The first worm wheel 242 and the second worm 243 are arranged coaxially and rotate synchronously. The spindle 247 is perpendicular to the power output shaft 11 of the drive motor 1 and the third worm 245, respectively. The first worm 241 meshes with the first worm wheel 242. The second worm wheel 244 is fastened to the third worm 245, and the second worm 243 meshes with the second worm wheel 244.

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

[0038] It should be explained that drive motor 1 is a brushless motor; brushless motors can achieve constant torque output, which in turn makes the massage intensity more stable during massage.

[0039] It should be noted that the reduction assembly 24 in this embodiment achieves speed reduction transmission through a first worm gear pair composed of a first worm 241 and a first worm wheel 242, a second worm gear pair composed of a second worm 243 and a second worm wheel 244, and a third worm gear pair composed of a third worm 245 and a third worm wheel 246. This triple worm gear pair combination structure effectively improves the output torque of the drive motor 1. Furthermore, since each worm gear pair has a self-locking capability, the triple worm gear pair combination structure achieves a triple self-locking function. That is, the motor assembly applied to the mechanical massage function of automotive seats in this embodiment has a very high self-locking force. This triple self-locking structure effectively keeps the massage head at the required massage pressure position under external force, and prevents the massage head from shifting backward under significant external pressure, resulting in good stability and reliability.

[0040] It should be further pointed out that the spindle 247 of this embodiment is perpendicular to the power output shaft 11 of the drive motor 1 and the third worm 245, and the power output shaft 11 of the drive motor 1 and the power output component 3 are located on the same side of the third worm 245. The above-mentioned structural design is compact, small in size and can effectively reduce the space occupied by the whole.

[0041] In summary, the motor assembly for mechanical massage of car seats in this embodiment has the advantages of novel structural design, good stability and reliability, and strong self-locking capability through the above structural design.

[0042] Example 2, as Figure 2 , Figure 3 as well as Figure 6 As shown, the difference between this embodiment 2 and embodiment 1 is that: a rotating component 248 is embedded in the accommodating cavity 23, and the rotating component 248 is rotatably mounted on the housing 21 via a spindle 247.

[0043] The first worm gear 242 is disposed at one end of the rotating member 248, and 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 integral structures.

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

[0045] Example 3, as Figure 2 , Figure 3 as well as Figure 6 As shown, the difference between this embodiment 3 and embodiment 2 is that: the two ends of the mandrel 247 are circumferentially limited between the housing 21 and the cover 22; the housing 21 has a first slot 211 on each of the two axial ends of the mandrel 247, and a first wear-resistant pad 41 is embedded in each of the first slots 211, and the end faces of the two ends of the mandrel 247 respectively contact the first wear-resistant pad on the corresponding side.

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

[0047] Example 4, as Figure 2 , Figure 3 as well as Figure 5 As shown, the difference between this embodiment four and embodiment one is that: the housing 21 has an inner wall mounting hole 212 on the inner wall of the accommodating cavity 23, which opens toward the power output shaft 11 of the drive motor 1.

[0048] The inner wall mounting hole 212 is fitted with an elastic buffer pad 51, an output shaft wear-resistant 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 is rotatably mounted on the housing 21 via the bearing 53. The elastic buffer pad 51 is in 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 drive motor 1 is in abutting contact with the output shaft wear-resistant pad 52. The power output shaft 11 support structure composed of the elastic buffer pad 51, the output shaft wear-resistant pad 52 and the bearing 53 can effectively reduce the axial movement of the power output shaft 11 of the drive motor 1, thereby improving the stability of the drive motor 1 during operation.

[0050] Example 5, such as Figures 2 to 4 As shown, the difference between this fifth embodiment and the first embodiment is that: the housing 21 has a second slot 213 on one end of the third worm gear 245, and the second wear-resistant plate 42 is embedded in the second slot 213, and the end face of the corresponding side of the third worm gear 245 contacts the second wear-resistant pad.

[0051] The housing 21 has an outwardly opening internal threaded hole 214 on the other end of the third worm gear 245, which communicates with the accommodating cavity 23. The internal threaded hole 214 is fitted with a clearance adjusting screw 61. The inner end face of the clearance adjusting screw 61 has a positioning hole 611. An axial wear-resistant pad 62 is positioned and installed in the positioning hole 611 of the clearance adjusting screw 61. The axial wear-resistant pad 62 contacts the end face of the corresponding side of the third worm gear 245.

[0052] During operation, the gap adjustment set screw 61 can be rotated to move axially relative to the third worm 245, thereby causing the gap adjustment set screw 61 and the axial wear-resistant pad 62 to move along the axial direction of the third worm 245, so as to ensure that the axial wear-resistant pad 62 and the end face of the third worm 245 maintain abutting contact.

[0053] When the third worm 245 becomes axially loose, the user can adjust the set screw 61 by rotating the clearance to keep the axial wear pad 62 in abutting contact with the end face of the third worm 245, which can effectively improve the axial impact resistance of the product.

[0054] Example 6, as Figure 2 , Figure 3 as well as Figure 5 As shown, the difference between this sixth embodiment and the first embodiment is that the power output component 3 includes a rod sleeve portion 31, the third worm gear 246 is disposed 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.

[0055] The core of the sleeve part 31 is provided with an axially penetrating sleeve hole 32, the box body 21 is provided with a box body through hole 215 axially aligned with the sleeve hole 32 of the sleeve part 31, and the box cover 22 is provided with a box cover through hole 221 axially aligned with the sleeve hole 32 of the sleeve part 31. One end of the sleeve part 31 is inserted into the box body through hole 215, and the other end of the sleeve part 31 is inserted into the box cover through hole 221.

[0056] The above description is only a preferred embodiment of the present invention. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. A motor assembly applied to mechanical massage of automobile seat, comprising a driving motor (1), a reduction box (2) and a power output member (3), the reduction box (2) comprises a box body (21), a box cover (22) fastened to the box body (21), a containing cavity (23) formed between the box body (21) and the box cover (22), and a reduction assembly (24) embedded in the containing cavity (23); the shell of the driving motor (1) is fastened to the box body (21), and the power output shaft (11) of the driving motor (1) extends into the containing cavity (23); characterized in that 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 fastened to the power output shaft (11) of the driving motor (1); the third worm (245) is arranged in parallel with the power output shaft (11) of the driving motor (1) with a spacing, the first worm wheel (242) and the second worm (243) are rotatably installed on the box body (21) through a core shaft (247), the first worm wheel (242) and the second worm (243) are coaxially arranged and synchronously rotated, the core shaft (247) is perpendicular to the power output shaft (11) of the driving motor (1) and the third worm (245) respectively, the first worm (241) is engaged with the first worm wheel (242); the second worm wheel (244) is fastened to the third worm (245), and the second worm (243) is engaged with the second worm wheel (244); the third worm wheel (246) is arranged on the power output member (3), the third worm (245) is engaged with the third worm wheel (246), and the power output shaft (11) of the driving motor (1) and the power output member (3) are located on the same side of the third worm (245); an inner wall mounting hole (212) opening towards the power output shaft (11) of the driving motor (1) is formed in the inner wall of the containing cavity (23); an elastic buffer pad (51), an output shaft wear pad (52) and a bearing (53) arranged in sequence are embedded in the inner wall mounting hole (212), the end of the power output shaft (11) extends into the inner wall mounting hole (212), the end of the power output shaft (11) is rotatably installed on the box body (21) through the bearing (53), and the elastic buffer pad (51) is in abutting contact with the end face of the power output shaft (11) through the output shaft wear pad (52).

2. The motor assembly applied to the mechanical massage of the car seat according to claim 1, characterized in that: a rotating member (248) is embedded in the containing cavity (23), and the rotating member (248) is rotatably installed on the box body (21) through the core shaft (247); the first worm wheel (242) is arranged on one end of the rotating member (248), the second worm (243) is arranged on the other end of the rotating member (248), and the first worm wheel (242) and the second worm (243) are an integral structure.

3. The motor assembly applied to the mechanical massage of the car seat 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 (21) is provided with a first clamping groove (211) at each axial end of the mandrel (247), and a first wear-resistant sheet (41) is clamped and installed in each first clamping groove (211), and the end face of the end portion of the mandrel (247) is in contact with the first wear-resistant pad on the corresponding side.

4. The motor assembly for mechanical massage of car seat according to claim 1, characterized in that: The box (21) is provided with a second clamping groove (213) at one end of the third worm (245), a second wear-resistant sheet (42) is clamped and installed in the second clamping groove (213), and the end face of the corresponding side of the third worm (245) is in contact with the second wear-resistant pad. The box (21) is provided with an internally threaded hole (214) opening outward and communicating with the accommodating cavity (23) at the other end of the third worm (245), and a gap adjusting jackscrew (61) is screwed into the internally threaded hole (214); the inner end face of the gap adjusting jackscrew (61) is provided with a positioning hole (611), and an axial wear-resistant pad (62) is positioned and installed in the positioning hole (611) of the gap adjusting jackscrew (61), and the axial wear-resistant pad (62) is in contact with the end face of the corresponding side of the third worm (245).

5. The motor assembly for mechanical massage of car seat according to claim 1, wherein: The power output member (3) comprises a rod sleeve portion (31), the third worm (246) is arranged at the periphery of the rod sleeve portion (31), and the rod sleeve portion (31) and the third worm (246) are an integral structure; The core portion of the rod sleeve portion (31) is provided with a sleeve hole (32) axially penetrating, the box (21) is provided with a box through hole (215) axially aligned with the sleeve hole (32) of the rod sleeve portion (31), and 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 portion of the rod sleeve portion (31) is inserted into the box through hole (215), and the other end portion of the rod sleeve portion (31) is inserted into the box cover through hole (221).

6. The motor assembly for mechanical massage of car seat according to claim 1, wherein: The driving motor (1) is a brushless motor.

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