Orthogonal nut swing driving mechanism
By employing a helical gear and transmission nut design in the orthogonal nut drive mechanism of an automatic car door, combined with transmission shaft bearings and spherical bearings, the problems of uneven torque transmission and non-compact structure are solved, achieving uniform force distribution and a compact structure, thereby improving the reliability and service life of the drive mechanism.
Patent Information
- Application Number
- CN202423133760.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-18
AI Technical Summary
Existing orthogonal nut drive mechanisms for automatic car doors suffer from problems such as uneven torque transmission, stress concentration, non-compact structure, complex assembly, and easy damage to limit switches.
The design employs helical gears and a transmission nut, combined with a transmission shaft bearing and a spherical bearing, to achieve the extension, retraction, and swinging motion of the nut. The uniform distribution design of the transmission shaft bearing and the cooperation of the hemispherical limiting part ensure uniform force distribution without affecting the structural strength.
It enables a large-size limiting plane to adapt to swing at different angles, resulting in a larger force-bearing area, avoiding stress concentration, a more compact structure, and easier processing, thereby improving the reliability and service life of the drive mechanism.
Smart Images
Figure CN223724409U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of automobile automatic door, concretely relates to a normal nut swing drive mechanism. BACKGROUND
[0002] The automatic vertical hinged door normal drive mechanism can be divided into integral rotation type and nut rotation type, wherein the integral rotation type has a rotating support fixed to the door outside the drive mechanism, the lead screw is pushed out when opening and closing the door, the drive mechanism and the rotating support are hinged and can rotate with each other, the installation space needs to consider avoiding most moving parts including the motor gear box, the nut internal swing normal drive mechanism in the prior art has only 2 transmission pins, the torque transmission of the nut periphery is uneven, stress concentration is easy, and the nut internal swing normal drive mechanism small size gear needs 2 independent bearing bushings for convenient assembly, the nut and the gear wall thickness and strength are affected, the lead screw tail limit is directly stressed on the nut and is easy to damage the nut, and the lead screw deflection makes the tail limit plane difficult to match the bearing plane when limiting. SUMMARY
[0003] The utility model provides a normal nut swing drive mechanism, which can make the large-size limit plane swing and tilt and still press on the bearing plane, has a larger stress area and is not easy to fail due to stress.
[0004] The utility model discloses a normal nut swing drive mechanism that solves the above technical problems, which comprises a motor, a worm, a bevel gear and a lead screw assembly.
[0005] Preferably, in the above-mentioned normal nut swing drive mechanism, the drive mechanism further comprises a transmission bearing, the worm and the bevel gear are orthogonal and rotate at an angle of 90 degrees, one end of the bevel gear has a nesting part, and the bevel gear is nested into the inner ring of the transmission bearing through the nesting part.
[0006] Preferably, in the above-mentioned normal nut swing drive mechanism, the other end of the bevel gear is a half concave spherical surface and is provided with a plurality of circumferentially distributed grooves, one end of the transmission bearing bushing is provided with a plurality of circumferentially distributed bosses and is inserted into the grooves of the bevel gear, the middle of the transmission bearing bushing has a half concave spherical surface with the same radius as the bevel gear, the outer surface of the transmission nut has a convex spherical surface and is wrapped and matched by the combined concave spherical surface of the transmission bearing bushing and the bevel gear.
[0007] As preferred, in the above-mentioned orthogonal nut swing driving mechanism, the boss of the transmission bearing has a spherical surface limiting part, the outer surface of the transmission nut is provided with the same number of circular arc grooves as the spherical surface limiting part, the spherical surface limiting part is clamped into the circular arc groove to transmit torque when the screw assembly rotates, and the spherical surface limiting part is clamped into the circular arc groove to realize the swing of the screw assembly.
[0008] As preferred, in the above-mentioned orthogonal nut swing driving mechanism, the driving mechanism further comprises an end face thrust bearing and a dust cover, the transmission bearing is nested against one end face of the end face thrust bearing, and the other end face is tightened by the dust cover and the gear box through screws.
[0009] As preferred, in the above-mentioned orthogonal nut swing driving mechanism, the driving mechanism further comprises a door mounting bracket and a gear box, the transmission bearing and the bevel gear are located in the gear box, the outer ring of the transmission bearing is installed in the gear box and is tightly limited by the door mounting bracket.
[0010] As preferred, in the above-mentioned orthogonal nut swing driving mechanism, a shaft coupling and a worm bearing are further provided between the worm and the motor, the output shaft of the motor and the shaft of the worm are connected by the shaft coupling and can be axially moved for fine adjustment, the inner ring of the worm bearing is sleeved on the shaft of the worm, and the outer ring is fixed to the inside of the gear box to make the worm rotate.
[0011] As preferred, in the above-mentioned orthogonal nut swing driving mechanism, the screw assembly comprises a screw, an arc-shaped guide block fixed to one end of the screw, a limiting block, and a self-locking nut, the outer thread of the screw is engaged with the inner thread of the transmission nut, the rear end face of the arc-shaped guide block is convex arc-shaped and is in contact with the middle curved surface of the front end face of the limiting block, the edge of the front end face is flat, and the rear end face of the limiting block is convex arc-shaped and is in contact with the inner concave surface of the self-locking nut.
[0012] Here, the limiting end of the tail of the screw is a concave spherical surface, which is in contact with the convex spherical surface of the joint bearing, and the other end is a convex spherical surface which is in contact with the end face of the self-locking nut. When the limiting block is pressed against the end face of the bearing, the center can slide around the spherical surface to adapt to different swing angles of various doors until the flat front end face of the limiting block is in contact with the end face thrust bearing.
[0013] As preferred, in the above-mentioned orthogonal nut swing driving mechanism, the other end of the screw is provided with a body bracket, a pin shaft, and a joint bearing, the pin shaft is connected to the connecting holes of the body bracket and the joint bearing in series, and the joint bearing is installed into the spherical hole of the head of the screw.
[0014] As preferred, in the above-mentioned orthogonal nut swing driving mechanism, the screw is externally provided with a bellows, the bellows is sleeved on the front end of the screw and clamped between the door mounting bracket and the gear box.
[0015] Compared with the prior art, the helical gear and the transmission nut are uniformly distributed in the transmission point circle, the stress is more uniform, the helical gear and the transmission nut do not need two independent bearing bushes and transmission pins, which is beneficial to production and processing, and the structure is more compact, only one transmission bearing bush is needed to realize transmission and limit rotation of the nut at the same time, the wall thickness and strength of the transmission nut and the helical gear are not affected, the limiting movement joint at the tail of the screw rod can adapt to various swing angles of different vehicle doors. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is a schematic diagram of the overall structure of the orthogonal nut swing driving mechanism;
[0017] Figure 2 is a schematic diagram of the internal structure of the orthogonal nut swing driving mechanism;
[0018] Figure 3 is a schematic diagram of the helical gear, transmission nut and the like of the orthogonal nut swing driving mechanism;
[0019] Figure 4 is a schematic diagram of the internal cross-sectional structure of the orthogonal nut swing driving mechanism. DETAILED DESCRIPTION
[0020] The following is a specific embodiment of the utility model and is further described in combination with the drawings, but the utility model is not limited to these embodiments.
[0021] In the figure, motor 100; worm 200; helical gear 300; nesting part 301; groove 302; vehicle door mounting bracket 400; gear box 500; transmission bearing 600; screw rod 700; shaft coupling 800; worm bearing 900; transmission nut 1000; circular arc groove 1001; transmission bearing bush 1001; boss 10011; hemispherical surface limiting part 10012; end face thrust bearing 1002; dust cover 1003; arc-shaped guide block 1004; limiting block 1005; self-locking nut 1006; body bracket 1007; pin shaft 1008; joint bearing 1009; corrugated pipe 1010.
[0022] For example, Figure 1 And Figure 2As shown, the orthogonal nut swing driving mechanism includes a motor 100, a worm 200, a bevel gear 300, a door mounting bracket 400, a gear box 500, a transmission bearing 600, and a lead screw assembly. The lead screw assembly includes a lead screw 700. A coupling 800 and a worm bearing 900 are arranged between the worm 200 and the motor 100. The output shaft of the motor 100 is connected to the shaft of the worm 200 through the coupling 800 and can be axially moved for fine adjustment. The inner ring of the worm bearing 900 is sleeved on the shaft of the worm 200, and the outer ring is fixed to the inside of the gear box 500 and makes the worm 200 rotate. In this way, the worm 200 can be axially moved for fine adjustment. In addition, the worm 200 is engaged with the bevel gear 300. The worm 200 and the bevel gear 300 are orthogonal and rotate at an angle of 90°. One end of the bevel gear 300 has a nesting part 301. The bevel gear 300 is nested in the inner ring of the transmission bearing 600 through the nesting part 301. In this way, power can be transmitted from the worm 200 to the bevel gear 300.
[0023] As shown in Figure 3 and Figure 4 The driving mechanism of the present patent also includes a transmission nut 1000 and a transmission bearing bush 1001. The lead screw assembly passes through the transmission nut 1000. The transmission nut 1000 is connected and matched with the bevel gear 300 and the transmission bearing bush 1001, respectively. When the motor 100 drives the worm 200 to rotate the bevel gear 300, the lead screw assembly and the transmission nut 1000 realize both extension and swing in the door by the action of the transmission bearing bush 1001. The extension of the lead screw assembly can realize the opening of the door, and the swing can realize the adjustment of a certain angle, thereby ensuring the reliability of the entire driving mechanism.
[0024] As a priority, the other end of the helical gear 300 in this patent is half of a concave spherical surface and is provided with several circumferentially distributed grooves 302, one end of the transmission bush 1001 is provided with several circumferentially distributed bosses 10011 and is inserted into the grooves 302 of the helical gear 300, the middle of the transmission bush 1001 has a half of a concave spherical surface with the same radius as the helical gear 300, the outer surface of the transmission nut 1000 has a convex spherical surface and is wrapped and fitted with the concave spherical surface of the combination of the transmission bush 1001 and the helical gear 300, in addition, the bosses 10011 of the transmission bush 1001 have a hemispherical surface limiting part 10012, the outer surface of the transmission nut 1000 is provided with the same number of circular arc grooves 1001 as the hemispherical surface limiting part 10012, here the hemispherical surface limiting part 10012 and the circular arc groove 1001 are in line contact to transmit torque, when the transmission nut 1000 rotates with the screw rod 700, the transmission bush 1001 can be fixed, the hemispherical surface limiting part 10012 of the transmission bush 1001 does not affect the flexible rotation of the circular arc groove 1001 of the transmission nut 1000 around its spherical center, in addition, the hemispherical surface limiting part 10012 is clamped into the circular arc groove 1001 to transmit torque when the screw rod assembly rotates, and after the hemispherical surface limiting part 10012 is clamped into the circular arc groove 1001, the screw rod assembly is also realized to swing.
[0025] In order to protect the core components and prevent impurities from entering the inside, the driving mechanism further comprises an end face thrust bearing 1002 and a dust cover 1003, the transmission bush 1001 is nested and abuts against one end face of the end face thrust bearing 1002, the other end face is tightened by the dust cover 1003 and the gear box 500 through screws, the transmission bearing 600 and the helical gear 300 are located in the gear box 500, the outer ring of the transmission bearing 600 is installed into the gear box 500 and is pressed and limited by the door installation support 400, here the screw rod assembly further comprises an arc-shaped guide block 1004 fixed at one end of the screw rod 700, a limiting block 1005, a self-locking nut 1006, the external threads of the screw rod 700 are engaged with the internal threads of the transmission nut 1000, the rear end face of the arc-shaped guide block 1004 is convex arc-shaped and is fitted with the middle curved surface of the front end face of the limiting block 1005, the edge of the front end face is flat, the rear end face of the limiting block 1005 is convex arc-shaped and is fitted with the inner concave surface of the self-locking nut 1006, here the limiting end of the tail of the screw rod 700 is concave spherical and is fitted with the convex spherical joint bearing 1009, the other end is convex spherical and is fitted with the end face of the concave spherical self-locking nut 1006, when the limiting block 1005 is forced against the end face of the bearing, the center can slide around the spherical surface to adapt to different door swing angles, until the flat front end face of the limiting block 1005 is fitted with the end face thrust bearing 1002.
[0026] The other end of the screw rod 700 is provided with a body support 1007, a pin shaft 1008 and a joint bearing 1009, the pin shaft 1008 is connected with the connecting holes of the body support 1007 and the joint bearing 1009 in series, the joint bearing 1009 is installed into the ball hole of the head of the screw rod 700, the screw rod 700 is externally provided with a bellows 1010, the bellows 1010 is sleeved on the front end of the screw rod 700 and is clamped between the door mounting support 400 and the gear box 500, the screw rod 700 can be protected by the bellows 1010, the transmission points between the helical gear 300 and the transmission nut 1000 are circumferentially distributed, the stress is more uniform, the helical gear and the transmission nut 1000 do not need two independent bearing bushes and transmission pins, which is beneficial to production and processing and the structure is more compact, only one transmission bearing bush 1001 is needed to realize the transmission and limit the rotation of the nut at the same time, the wall thickness and strength of the transmission nut 1000 and the helical gear 300 are not affected, the tail of the screw rod 700 is limited by a movable joint and can be self-adapted to various swing angles of different doors.
[0027] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present disclosure.
[0028] The above-described embodiments only express several implementation manners of the present application, the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application.
Claims
1. A orthogonal nut oscillation drive mechanism, comprising a motor, a worm, a bevel gear and a screw assembly, the motor output is connected to the worm, the worm is engaged with the bevel gear, characterized in that, The driving mechanism further comprises a transmission nut and a transmission bearing, the worm is orthogonally engaged with the bevel gear and rotates at an angle of 90°, one end of the bevel gear has a nesting part, and the bevel gear is nested into the inner ring of the transmission bearing through the nesting part.
2. A quadrature nut wobble drive mechanism according to claim 1, wherein The other end of the bevel gear is a half concave spherical surface and is provided with a plurality of circumferentially distributed grooves, one end of the transmission bearing is provided with a plurality of circumferentially distributed bosses and is inserted into the grooves of the bevel gear, the middle of the transmission bearing has a half concave spherical surface with the same radius as the bevel gear, and the outer surface of the transmission nut has a convex spherical surface and is wrapped and fitted by the combined concave spherical surfaces of the transmission bearing and the bevel gear.
3. A quadrature nut oscillating drive mechanism according to claim 1 or 2, characterized in that The bosses of the transmission bearing have a half spherical surface limiting part, the outer surface of the transmission nut is provided with the same number of circular arc grooves as the half spherical surface limiting part, the half spherical surface limiting part is clamped into the circular arc groove to transmit torque when the screw rod assembly rotates, and the half spherical surface limiting part is clamped into the circular arc groove to realize the swing of the screw rod assembly.
4. A quadrature nut wobble drive mechanism according to claim 1 wherein, The driving mechanism further comprises an end face thrust bearing and a dust cover, the transmission bearing is nested against one end face of the end face thrust bearing, and the other end face is tightened by the dust cover and the gear box through screws.
5. A quadrature nut wobble drive mechanism according to claim 1 wherein, The driving mechanism further comprises a door mounting bracket and a gear box, the transmission bearing and the bevel gear are located in the gear box, the outer ring of the transmission bearing is installed into the gear box and is tightly limited by the door mounting bracket.
6. A quill nut oscillating drive mechanism according to claim 1, wherein A shaft coupling and a worm bearing are further provided between the worm and the motor, the output shaft of the motor and the shaft of the worm are connected by the shaft coupling and can be axially moved for fine adjustment, the inner ring of the worm bearing is sleeved on the shaft of the worm, and the outer ring is fixed to the inside of the gear box to make the worm rotate.
7. A quadrature nut wobble drive mechanism according to claim 1 wherein, The screw rod assembly comprises a screw rod, an arc-shaped guide block, a limiting block and a self-locking nut fixed to one end of the screw rod, the outer thread of the screw rod is engaged with the inner thread of the transmission nut, the rear end face of the arc-shaped guide block is convex and is fitted with the middle curved surface of the front end face of the limiting block, the edge of the front end face is flat, and the rear end face of the limiting block is convex and is fitted with the inner concave surface of the self-locking nut.
8. A quill nut oscillating drive mechanism according to claim 1, wherein The other end of the screw rod is provided with a body bracket, a pin shaft and a joint bearing, the pin shaft is connected to the connecting holes of the body bracket and the joint bearing, and the joint bearing is installed into the ball hole of the screw rod head.
9. A quill nut oscillating drive mechanism according to claim 8, wherein A bellows is provided outside the screw rod, the bellows is sleeved on the front end of the screw rod and is clamped between the door mounting bracket and the gear box.
10. A quill nut oscillating drive mechanism according to claim 8, wherein