A mounting bracket and a mounting structure between the bracket and the reduction box

Abstract

The present invention discloses a mounting bracket and a mounting structure between the mounting bracket and the reduction box, wherein the mounting bracket is made of engineering plastic and has an inner hole for mounting the reduction box, the radial periphery of the inner hole is the mounting bracket body, and a fan-shaped groove is arranged on the mounting bracket body; two screw holes for the screw to pass through are symmetrically opened on the mounting bracket body; and an arc-shaped groove is arranged on one end face of the mounting bracket body in the axial direction. The mounting structure between the mounting bracket and the reduction box is adopted, and flange parts and external bosses are respectively arranged at both ends in the axial direction of the reduction box; after installation, the external bosses mesh with the arc-shaped grooves on the mounting bracket body to form a buckle structure, and the buckle structure cooperates with the flange part of the reduction box to limit the reduction box axially on the mounting bracket body, and the screw passes through the two screw holes on the mounting bracket body. The present invention solves the problems of insufficient rotation angle of the motor in space and insufficient position that the screw can reach in the skeleton space.

Description

Technical Field

[0001] The invention relates to the technical field of seat motors, and in particular to a mounting bracket and a mounting structure between the bracket and a reduction box. Background Art

[0002] In recent years, with the continuous improvement of consumers' requirements for automobile comfort and the pursuit of more and more space in the car, the automobile seat adjustment motor has been developing in the direction of becoming lighter and smaller. At present, some mounting brackets used in automobiles are formed by riveting or welding of plates, generally using high-strength steel plates, and the seat motor bracket is connected to the motor by screws, which increases the weight of the motor, increases the cost, and wastes part of the motor performance. Some seat motor brackets are made of plastic, and buckles are added to the lower end surface of these seat motor brackets made of plastic, and the fixing plates are passed through these buckles to fix the motor, and then the motor is connected to the seat motor bracket by screws. Such a seat motor bracket made of plastic is relatively complex and will add new parts, which will increase the cost of the motor.

[0003] At present, the research and application of lightweight seat adjustment motors in the domestic automobile industry is a difficult problem in the industry's R&D process. Summary of the invention

[0004] One of the purposes of the present invention is to provide a mounting bracket with a new structure to address the defects and shortcomings of the current seat adjustment motor.

[0005] A second object of the present invention is to provide a mounting structure between the above-mentioned mounting bracket and the reduction gearbox.

[0006] As the first aspect of the present invention, the mounting bracket is made of engineering plastic, and the mounting bracket has an inner hole for mounting the reduction gearbox, the radial outer periphery of the inner hole is the mounting bracket body, and the two sides of the axial direction of the inner hole are open; a fan-shaped groove is arranged on the mounting bracket body, the radial inner side of the fan-shaped groove is radially connected with the inner hole, and the two sides of the axial direction of the fan-shaped groove are open; two screw holes for the screw to pass through are symmetrically opened on the mounting bracket body, and the length of each screw hole extending along the circumferential direction of the mounting bracket body is greater than the length of the screw hole extending along the axial direction of the mounting bracket body; an arc-shaped groove is arranged on one end face of the mounting bracket body in the axial direction, and the arc-shaped groove is located on the inner hole side of the mounting bracket.

[0007] In a preferred embodiment of the present invention, the arc-shaped groove corresponds to a circumferential position of a lead screw hole in the circumferential direction of the mounting bracket body.

[0008] In a preferred embodiment of the present invention, two arc-shaped protrusions protruding into the inner hole are symmetrically arranged on the hole wall of the inner hole, and each arc-shaped protrusion corresponds to a circumferential position of a screw hole in the circumferential direction of the mounting bracket body.

[0009] As a second aspect of the present invention, the mounting structure between the above-mentioned mounting bracket and the reduction box also includes a reduction box, in which a motor, a worm gear transmission mechanism and a screw nut transmission mechanism are installed, wherein the worm wheel in the worm gear transmission mechanism is connected with the nut in the screw nut transmission as a whole, the motor drives the worm transmission in the worm gear transmission, the worm drives the worm wheel in the worm gear transmission mechanism to rotate, and the worm wheel drives the nut in the screw nut transmission to rotate; a flange is provided at one end of the reduction box in the axial direction, and an external boss is provided at the other end; when installing, the end of the reduction box with the external boss is inserted from the inner hole without arc in the main body of the mounting bracket This end of the fan-shaped groove is inserted into the inner hole, and when inserting, the outer boss is aligned with the fan-shaped groove; after the reduction box is inserted into place, the reduction box is rotated so that the outer boss on the reduction box engages with the arc-shaped groove on the mounting bracket body to form a snap-fit ​​structure, and the snap-fit ​​structure cooperates with the flange part of the reduction box to axially limit the reduction box on the mounting bracket body, and the lead screw in the lead screw and nut transmission mechanism is inserted from a lead screw hole on the mounting bracket body, and then screwed through the nut in the lead screw and nut transmission mechanism, and then passed through another lead screw hole on the mounting bracket body to complete the assembly of the mounting bracket body and the reduction box.

[0010] In a preferred embodiment of the present invention, the outer circle of the reduction gearbox is composed of a circumferential portion and an outer arc protrusion, the circumferential portion is slidingly matched with two arc-shaped protrusions on the mounting bracket body, and the outer arc protrusion is embedded in the fan-shaped groove and is slidingly matched with the fan-shaped groove.

[0011] In a preferred embodiment of the present invention, a limiting portion is provided on both sides of the outer arc protrusion in the circumferential direction, and the two limiting portions also constitute a part of the outer circle of the reduction box and cooperate with the groove edges on both sides of the fan-shaped groove in the circumferential direction to limit the rotation angle of the reduction box.

[0012] In a preferred embodiment of the present invention, in the absence of a screw, with the center diameter of the fan-shaped groove as a reference, the reduction gear box rotates by 23° to one side of the center diameter of the fan-shaped groove and by 35° to the other side of the center diameter of the fan-shaped groove.

[0013] In a preferred embodiment of the present invention, in the state with a lead screw, with the center diameter line of the fan-shaped groove as a reference, the reduction box rotates by an angle of 13.5° to one side of the center diameter line of the fan-shaped groove in the circumferential direction, and rotates by an angle of 13.5° to the other side of the center diameter line of the fan-shaped groove in the circumferential direction.

[0014] In a preferred embodiment of the present invention, the reducer includes a reducer body and a reducer cover, the worm gear transmission mechanism and the screw nut transmission mechanism are installed in the reducer body, a part of the circumferential portion, the outer arc protrusion and the two limit portions are located on the outer circle of the reducer body, and the other part of the circumferential portion is located on the outer circle of the reducer cover; the flange portion and the outer boss are arranged at both ends of the axial direction of the reducer body, a plurality of positioning columns are circumferentially arranged on the surface of the reducer body for mounting the reducer cover, and a plurality of mounting holes are circumferentially opened on the reducer cover, each positioning column cooperates with the corresponding mounting hole, so that the reducer cover is installed on the reducer body, and the outer circle rotation center of the reducer cover is concentric with the outer circle rotation center of the reducer body.

[0015] In the past, when similar small and lightweight motors were running on the skeleton, the motors rotated around one end of the mounting bracket (that is, the motor's rotation center). After the present invention adopts the above technical solution, the motor can rotate around the central axis of the mounting bracket (that is, the motor's rotation center) at both ends, solving the problem of insufficient rotation angle of the motor in space and insufficient position that the lead screw can reach in the skeleton space. That is, the motor can rotate at a larger angle in space and the lead screw can move longer, and more positions can be reached in space, so that the motor can adapt to more different skeletons, and the motor equipped with this new plastic structure bracket is light in weight and low in noise.

[0016] In addition, the present invention has the following beneficial effects: the structure of the mounting bracket body interacts with the reduction box, the outer boss on the reduction box is buckled on the arc-shaped groove of the mounting bracket body and cannot fall, and the flange of the reduction box is blocked by the mounting bracket body and cannot move upward, which can better increase the stability of the reduction box, avoid unnecessary damage to the motor output shaft in the reduction box due to the vertical movement of the reduction box, and improve the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the mounting bracket of the present invention viewed from one direction.

[0018] Figure 2 This is a schematic structural diagram of the mounting bracket of the present invention viewed from another direction.

[0019] Figure 3 It is a schematic diagram of the structure of the reduction box of the present invention (without the lead screw).

[0020] Figure 4 This is a schematic diagram of the decomposition of the reduction gearbox of the present invention (without the lead screw).

[0021] Figure 5 This is a schematic structural diagram of the reduction gearbox of the present invention viewed from one direction (with a lead screw).

[0022] Figure 6 This is a schematic structural diagram of the reduction box of the present invention viewed from another direction (with a lead screw).

[0023] Figure 7 This is a schematic diagram of the reduction box and the mounting bracket of the present invention after being assembled, viewed from one direction.

[0024] Figure 8 This is a schematic diagram of the reduction box and the mounting bracket of the present invention after being assembled, viewed from another direction.

[0025] Fig. 9 It is a schematic diagram of the state of the reduction gearbox of the present invention in the initial position.

[0026] Fig.10 It is a schematic diagram of the state of the reduction box of the present invention rotating clockwise from the initial position to the extreme position (without the lead screw).

[0027] Fig.11 It is a schematic diagram of the state of the reduction box of the present invention rotating counterclockwise from the initial position to the extreme position (without the lead screw).

[0028] Fig.12 It is a schematic diagram of the state in which the reduction box of the present invention rotates clockwise from the initial position to the screw being in the extreme position (with the screw).

[0029] Fig.13 It is a cross-sectional schematic diagram (with a lead screw) of the reduction box of the present invention when it rotates clockwise from an initial position to when the lead screw is at an extreme position.

[0030] Fig.14 It is a schematic diagram of the state in which the reduction box of the present invention rotates counterclockwise from the initial position to the lead screw is in the extreme position (with the lead screw).

[0031] Fig.15 It is a cross-sectional schematic diagram (with a lead screw) of the reduction box of the present invention when it rotates counterclockwise from an initial position to when the lead screw is at an extreme position. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] See also Figure 1 and Figure 2The mounting bracket 10 shown in the figure is made of engineering plastics. The mounting bracket 10 has an inner hole 11 for mounting the reduction gearbox. The radial periphery of the inner hole 11 is the mounting bracket body 12. Both sides of the inner hole 11 in the axial direction are open.

[0034] A fan-shaped groove 13 is provided on the mounting bracket body 12 . The radial inner side of the fan-shaped groove 13 is radially connected to the inner hole 11 , and both sides of the fan-shaped groove 13 in the axial direction are open.

[0035] Two screw holes 14 , 15 for the screw to pass through are symmetrically provided on the mounting bracket body 12 . The length of each screw hole 14 , 15 extending in the circumferential direction of the mounting bracket body 12 is greater than the length of the screw hole 14 , 15 extending in the axial direction of the mounting bracket body 12 .

[0036] An arcuate groove 17 is provided on an end surface 16 of the mounting bracket body 12 in the axial direction. The arcuate groove 17 is located on the inner hole 11 side of the mounting bracket 10 and corresponds to the circumferential position of a lead screw hole 15 in the circumferential direction of the mounting bracket body 11 .

[0037] In order to reduce the contact area between the mounting bracket body 12 and the reduction gearbox while providing effective support for the reduction gearbox, two arc-shaped protrusions 18 and 19 protruding into the inner hole 11 are symmetrically arranged on the hole wall of the inner hole 11. The arc-shaped protrusion 18 corresponds to the circumferential position of a screw hole 14 in the circumferential direction of the mounting bracket body 12, and the arc-shaped protrusion 19 corresponds to the circumferential position of a screw hole 15 in the circumferential direction of the mounting bracket body 12.

[0038] When the screw is in the extreme position, in order to make the mounting bracket body 12 in close contact with the head retaining ring and the tail retaining ring at both ends of the screw to limit the rotation of the screw, convex arc surfaces 12a and 12b are provided on the outer periphery of the mounting bracket body 12 corresponding to the two screw holes 14 and 15.

[0039] The length of the arc-shaped protrusions 18 and 19 extending circumferentially along the mounting bracket body 12 is smaller than the length of the screw holes 14 and 15 extending circumferentially along the mounting bracket body 12. At the same time, one end of the arc-shaped protrusions 18 and 19 in the circumferential direction is respectively connected to the two ends of the fan-shaped groove 13 in the circumferential direction and terminates at the two ends of the fan-shaped groove 13 in the circumferential direction.

[0040] See also Figures 3 to 6 The reduction box 20 shown in the figure includes a reduction box body 21 and a reduction box cover 22. The motor, the worm gear transmission mechanism and the screw nut transmission mechanism are installed in the reduction box body 21.

[0041] The outer circle of the reduction box body 21 is composed of a part 23a of the circumference 23, the outer arc protrusion 24 and two limit parts 25, 26, and the two limit parts 25, 26 are respectively located between the circumferential ends of the outer arc protrusion 24 and the circumferential ends of the circumferential part 23. Another part 23b of the circumference 23 is located on the outer circle of the reduction box cover 22.

[0042] A flange portion 27 is provided at one end of the reduction box body 21 in the axial direction, and an external boss 28 is provided at the other end. A plurality of positioning columns 29a are circumferentially provided on the surface 29 of the reduction box body 21 for mounting the reduction box cover 22, and a plurality of mounting holes 22a are opened circumferentially on the reduction box cover 22. Each positioning column 29a cooperates with the corresponding mounting hole 21a so that the reduction box cover 22 is mounted on the reduction box body 21, and the outer circumferential rotation center 22b of the reduction box cover 22 is concentric with the outer circumferential rotation center 21a of the reduction box body 21.

[0043] The worm wheel in the worm gear transmission mechanism is connected with the nut in the lead screw nut transmission as a whole. The motor drives the worm in the worm gear transmission, the worm drives the worm wheel in the worm gear transmission mechanism to rotate, and the worm wheel drives the nut in the lead screw nut transmission to rotate.

[0044] See also Figure 7 and Figure 8 During installation, insert the end of the reduction box 20 with the external boss 28 into the inner hole 11 from the end 12d of the inner hole 11 in the mounting bracket body 12 without the arc groove 17. During insertion, align the external boss 28 with the fan-shaped groove 13. After the reduction box 20 is inserted into place, rotate the reduction box 20 so that the external boss 28 on the reduction box 20 engages with the arc groove 17 on the mounting bracket body 12 to form a snap-fit ​​structure, which cooperates with the flange portion 27 of the reduction box 20 to axially restrict the reduction box 20 on the mounting bracket body 12. In this way, the structure of the mounting bracket body 12 interacts with the reduction box 20, and the outer boss 28 on the reduction box 20 is buckled on the arc-shaped groove 17 of the mounting bracket body 12 and cannot fall down, and the flange portion 27 of the reduction box 20 is blocked by the mounting bracket body 12 and cannot move upward. This can better increase the stability of the reduction box 20, avoid unnecessary damage to the motor output shaft in the reduction box 20 caused by the vertical movement of the reduction box 20, and also improve the service life of the motor.

[0045] After the reduction box 20 is installed in place, a portion 23a of the circumferential portion 23 of the reduction box 20 located at the reduction box body 21 slides with the arc-shaped protrusion 19 on the mounting bracket body 12, another portion 23a of the circumferential portion 23 of the reduction box 20 located at the reduction box cover 21 slides with the arc-shaped protrusion 18 on the mounting bracket body 12, and the outer arc protrusion 24 is embedded in the fan-shaped groove 13 and slides with the groove bottom of the fan-shaped groove 13. During the rotation of the reduction box 20, the two limiting portions 25 and 26 respectively cooperate with the groove edges 13a and 13b on both sides of the circumferential direction of the fan-shaped groove 13 to limit the rotation angle of the reduction box 20.

[0046] Insert the tail end of the lead screw 30 with the head retaining ring 31 in the lead screw nut transmission mechanism from a lead screw hole 14 on the mounting bracket body 12, then screw it through the nut in the lead screw nut transmission mechanism, and then pass it through another lead screw hole 15 on the mounting bracket body 12, and then install the tail retaining ring 32 at the tail end of the lead screw 30 to complete the assembly of the mounting bracket 12 and the reduction box 20.

[0047] See also Fig.10 In the absence of a lead screw, the reduction box 20 rotates 23° toward one side of the central diameter of the sector-shaped groove 13 (ie, clockwise) based on the central diameter 13c of the sector-shaped groove 13. Fig.11 Taking the center diameter line 13c of the sector-shaped groove 13 as a reference, the reduction box 20 rotates to the other side of the center diameter line of the sector-shaped groove 13 in the circumferential direction (ie, counterclockwise) by an angle of 35°.

[0048] See also Fig.12 and Fig.13 When the lead screw 30 is present, with the center diameter 13c of the fan-shaped groove 13 as a reference, when the reduction box 20 rotates to one side (i.e. clockwise) of the center diameter 13c of the fan-shaped groove 13 by an angle of 13.5°, the inner end face of the tail retaining ring 32 at the tail end of the lead screw 30 is in close contact with the outer convex arc surface 12b on the mounting bracket body 12, and the lead screw 30 will be restricted by the mounting bracket body 12 and cannot continue to move, and the motor is braked.

[0049] See also Fig.14 and Fig.15 When the lead screw 30 is present, with the center diameter 13c of the fan-shaped groove 13 as a reference, when the reduction box 20 rotates to the other side (i.e. counterclockwise) of the center diameter 13c of the fan-shaped groove 13 by an angle of 13.5°, the inner end face of the head retaining ring 31 at the tail end of the lead screw 30 is in close contact with the outer convex arc surface 12a on the mounting bracket body 12, and the lead screw 30 will be restricted by the mounting bracket body 12 and cannot continue to move, and the motor is braked.

[0050] Through the cooperation of the screw holes 14, 15 and the convex arc surfaces 12a, 12b on the mounting bracket body 12 and the head retaining ring 31 and the tail retaining ring 32 on the screw 30, the screw 30 can only rotate with the reduction box 20 within the range of ±13.5° based on the center diameter 13c of the fan-shaped groove 13.

Claims

1. A mounting structure between a mounting bracket and a reduction gearbox, comprising a mounting bracket, characterized in that: The mounting bracket is made of engineering plastic, and the mounting bracket has an inner hole for mounting the reduction box, the radial periphery of the inner hole is the mounting bracket body, and the two sides of the inner hole in the axial direction are open; a fan-shaped groove is arranged on the mounting bracket body, the radial inner side of the fan-shaped groove is radially connected with the inner hole, and the two sides of the fan-shaped groove in the axial direction are open; two screw holes for the screw to pass through are symmetrically arranged on the mounting bracket body, and the length of each screw hole extending along the circumferential direction of the mounting bracket body is greater than the length of the screw hole extending along the axial direction of the mounting bracket body; an arc-shaped groove is arranged on one end face of the mounting bracket body in the axial direction, and the arc-shaped groove is located on the inner hole side of the mounting bracket; It also includes a reduction box, in which a motor, a worm gear transmission mechanism and a screw nut transmission mechanism are installed, wherein the worm wheel in the worm gear transmission mechanism is connected with the nut in the screw nut transmission as a whole, the motor drives the worm transmission in the worm gear transmission, the worm drives the worm wheel in the worm gear transmission mechanism to rotate, and the worm wheel drives the nut in the screw nut transmission to rotate; a flange is provided at one end of the reduction box in the axial direction, and an external boss is provided at the other end; when installing, the end of the reduction box with the external boss is inserted into the inner hole from the end of the inner hole without the arc groove in the mounting bracket body. , align the outer boss with the fan-shaped groove during insertion; after the reduction box is inserted into place, rotate the reduction box so that the outer boss on the reduction box engages with the arc-shaped groove on the mounting bracket body to form a buckle structure, and the buckle structure cooperates with the flange of the reduction box to axially limit the reduction box on the mounting bracket body, insert the lead screw in the lead screw nut transmission mechanism from a lead screw hole on the mounting bracket body, then screw through the nut in the lead screw nut transmission mechanism, and then pass through another lead screw hole on the mounting bracket body to complete the assembly of the mounting bracket body and the reduction box; The outer circle of the reduction box is composed of a circumferential portion and an outer arc protrusion, the circumferential portion is slidably matched with two arc-shaped protrusions on the mounting bracket body, and the outer arc protrusion is embedded in the fan-shaped groove and slidably matched with the fan-shaped groove.

2. The mounting structure between the mounting bracket and the reduction gearbox according to claim 1, characterized in that: The arc-shaped groove corresponds to the circumferential position of a lead screw hole in the circumferential direction of the mounting bracket body.

3. The mounting structure between the mounting bracket and the reduction gearbox according to claim 1, characterized in that: Two arc-shaped protrusions protruding into the inner hole are symmetrically arranged on the hole wall of the inner hole, and each arc-shaped protrusion corresponds to a circumferential position of a lead screw hole in the circumferential direction of the mounting bracket body.

4. The mounting structure between the mounting bracket and the reduction gearbox according to any one of claims 1 to 3, characterized in that: A limiting portion is provided on both sides of the outer arc protrusion in the circumferential direction, respectively. The two limiting portions also constitute a part of the outer circle of the reduction box and cooperate with the groove edges on both sides of the circumferential direction of the fan-shaped groove to limit the rotation angle of the reduction box.

5. The mounting structure between the mounting bracket and the reduction gearbox according to claim 4, characterized in that: In the absence of a lead screw, with the center diameter of the fan-shaped groove as a reference, the reduction box rotates 23° to one side of the center diameter of the fan-shaped groove and 35° to the other side of the center diameter of the fan-shaped groove.

6. The mounting structure between the mounting bracket and the reduction gearbox according to claim 5, characterized in that: In the state with the lead screw, with the center diameter of the fan-shaped groove as the reference, the reduction box rotates by an angle of 13.5° to one side of the center diameter of the fan-shaped groove and by an angle of 13.5° to the other side of the center diameter of the fan-shaped groove.

7. The mounting structure between the mounting bracket and the reduction gearbox according to claim 6, characterized in that: The reduction gearbox comprises a reduction gearbox body and a reduction gearbox cover, the worm gear transmission mechanism and the screw and nut transmission mechanism are installed in the reduction gearbox body, a part of the circumferential portion, the outer arc protrusion and the two limit portions are located on the outer circle of the reduction gearbox body, and the other part of the circumferential portion is located on the outer circle of the reduction gearbox cover; the flange portion and the outer boss are arranged at both ends of the reduction gearbox body in the axial direction, a plurality of positioning columns are circumferentially arranged on the surface of the reduction gearbox body for mounting the reduction gearbox cover, and a plurality of mounting holes are circumferentially opened on the reduction gearbox cover, each positioning column cooperates with the corresponding mounting hole so that the reduction gearbox cover is installed on the reduction gearbox body, and the outer circle rotation center of the reduction gearbox cover is concentric with the outer circle rotation center of the reduction gearbox body.

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