CN219975281U

CN219975281U - Worm wheel fixed knot constructs and has its L type vaulting pole

Info

Publication number: CN219975281U
Application number: CN202321369434.XU
Authority: CN
Inventors: 黄森荣; 倪天麒
Original assignee: Ningbo Huakai Electronic Technology Co ltd
Current assignee: Ningbo Huakai Electronic Technology Co ltd
Priority date: 2023-05-31
Filing date: 2023-05-31
Publication date: 2023-11-07
Anticipated expiration: 2033-05-31

Abstract

The utility model discloses a worm gear fixing structure and an L-shaped stay bar with the same, comprising an axially positioned transmission rod, a connecting piece sleeved on the transmission rod and a transmission wheel formed on the connecting piece, wherein the transmission rod comprises a power input section and a power output section, the power input section is provided with a transmission connecting part used for forming transmission fit with the connecting piece, an interference connecting part tightly matched with the inner wall of the connecting piece and a limiting piece limited in the axial first direction of the connecting piece, the connecting piece limits the axial position through the interference connecting part and cancels a deflection and play gap, the limiting of the axial position is realized between the transmission rod and the connecting piece through the interference connecting part, thereby avoiding deflection and collision generated by the gap between the transmission rod and the connecting piece, and realizing synchronous rotation through the transmission connecting part.

Description

Worm wheel fixed knot constructs and has its L type vaulting pole

Technical Field

The utility model relates to the technical field of automobile stay bar equipment, in particular to a worm wheel fixing structure and an L-shaped stay bar with the worm wheel fixing structure.

Background

At present, an electric supporting rod of an automobile tail door is mainly used for opening and closing the automobile tail door and generally comprises a screw rod, a motor for driving the screw rod to rotate, an inner sleeve and an outer sleeve, wherein the motor and the screw rod are both positioned in the outer sleeve, and the inner sleeve is connected to a sliding block of the screw rod and can stretch and retract along with the sliding block relative to the outer sleeve, so that the automobile tail door is opened and closed;

in the telescoping process of the outer sleeve, the screw rod and the transmission gear sleeved on the screw rod are relied on, the motor is used for outputting torque to the transmission gear, the transmission gear is assembled on the screw rod shaft, and synchronous rotation is realized by spline joint, so that an assembly gap exists between the transmission gear and the screw rod shaft, the transmission gear deflects and moves in the axial direction in the telescoping process, so that the inside of the electric stay rod emits clear and crisp rattle and impact sound, normal use is influenced by the amplification of metal sheet metal of the automobile back door, the transmission gear and the screw rod shaft are made of metal materials, and if the transmission gear is tightly matched with the screw rod shaft, the torque between metal parts is too large, the screw rod shaft is easy to bend, the telescoping action smoothness is influenced, and the normal use of the electric stay rod is influenced.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide a worm wheel fixing structure and an L-shaped stay bar with the worm wheel fixing structure.

The technical aim of the utility model is realized by the following technical scheme: the utility model provides a worm wheel fixed knot constructs, includes the transfer line of axial positioning, cup joints the connecting piece on the transfer line to and constitute the drive wheel on the connecting piece, the transfer line includes power input section and power take off section, be equipped with on the power input section and be used for constituting transmission complex transmission connection position with the connecting piece, with connecting piece inner wall tight fit's interference connection position, and inject the locating part in connecting piece axial first direction, the connecting piece passes through interference connection position and inject axial position, and cancel beat and drunkenness clearance.

Further, the interference connection part is arranged between the transmission connection part and the power output section, and the limiting piece is arranged close to or in butt joint with the interference connection part.

Further, the power input section is provided with a limiting groove, and the limiting piece is clamped in the limiting groove and is abutted to the end part of the connecting piece in the axial first direction.

Further, the driving wheel refers to a worm wheel, the worm wheel is connected with a motor through a worm, and the power input unit and the driving rod are arranged in an L shape.

Further, the connecting piece is provided with an annular body corresponding to the transmission connecting part, and the driving wheel is integrally embedded and molded on the annular body and the connecting piece.

Further, a plurality of material passing holes are formed in the annular body in the circumferential direction, and the driving wheel is tightly connected with the annular body through the material passing holes.

Further, a first adapter is arranged at the output end of the motor, a second adapter is arranged on the worm, the end part of the worm is in plug-in transmission with the middle part of the second adapter, and the first adapter is in plug-in transmission with the peripheral side of the second adapter.

Further, the device also comprises a shell with a cavity, the driving wheel is restrained to rotate in the cavity, and a gap is arranged at any boundary between the driving wheel and the inner cavity.

The utility model also provides an L-shaped stay bar, which comprises the worm wheel fixing structure, a power output area and a power input area which are arranged in an L shape, an upper ball socket assembly formed at the power output area, and a lower ball socket assembly formed at the power input area, wherein the power output section is arranged in the power output area in the same direction, the power input section is arranged in the power input area, and a guide assembly connected with the upper ball socket assembly and the transmission rod is further arranged in the power output area.

Further, a bearing seat and a shell are further arranged between the power output area and the power input area, the shell defines the outline of the power input area, the screw rod is axially restrained to rotate in the bearing seat, the power input section of the transmission rod extends out of the guide assembly and enters the power input area, and the shell is fixedly connected with the bearing seat.

Compared with the prior art, the utility model has the following advantages and beneficial effects: the transmission gear is arranged as a connecting piece at the center shaft position in a split way, and a transmission wheel formed on the connecting piece, torque is input by the transmission wheel, power is output to the transmission rod through the connecting piece, and the transmission rod is driven to rotate;

the transmission rod and the connecting piece are limited in axial position through the interference connection part, so that deflection and collision caused by a gap between the transmission rod and the connecting piece are avoided, and synchronous rotation is realized through the transmission connection part.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model at a power input section;

FIG. 2 is a schematic diagram illustrating the cooperation of the transmission rod and the connecting member according to the present utility model;

FIG. 3 is an exploded view of the coupling and driving member of the present utility model;

FIG. 4 is a cross-sectional view of a connector of the present utility model;

FIG. 5 is a cross-sectional view of the housing of the present utility model;

FIG. 6 is another angular cross-sectional view of the housing of the present utility model;

FIG. 7 is an exploded view of the worm of the present utility model with the first and second adapters;

FIG. 8 is a cross-sectional view of a stay in accordance with the present utility model;

FIG. 9 is a schematic view of the upper socket assembly of the present utility model;

FIG. 10 is an exploded view of the guide assembly of the present utility model;

in the figure: 1. a transmission rod; 1.1, a power input section; 1.2, a power output section; 1.3, a transmission connection part; 1.4, interference connection parts; 1.5, a limit groove; 1.6, a limiting piece;

2. a connecting piece; 2.1, an annular body; 2.2, passing the material hole; 2.3, spline; 2.4, interference butt joint parts;

3. a driving wheel; 4. a motor; 5. a worm; 5.1, a transmission convex part;

6. a first adapter; 6.1, a fork-type connecting part;

7. a second adapter; 7.1, a first inserting groove; 7.2, a second inserting groove;

8. a power take-off region; 9. a power input region; 10. an upper ball socket assembly; 11. a lower ball socket assembly;

12. a guide assembly; 12.1, a guide tube; 12.11, guide slots; 12.2, a movable pipe; 12.3, nut member; 12.31, guide projections; 12.4, springs;

13. a bearing seat; 13.1, limit convex part;

14. a first bearing; 15. a second bearing; 16. a spiral groove;

17. a housing; 17.1, gap; 17.2, a first cushion; 17.3, a second cushion;

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It will be understood that, although the terms upper, middle, lower, top, end, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another for ease of understanding and are not used to define any directional or sequential limitation.

As shown in fig. 1-10, a worm wheel fixing structure comprises an axially positioned transmission rod 1, a connecting piece 2 sleeved on the transmission rod 1 and a transmission wheel 3 formed on the connecting piece 2, wherein the transmission rod 1 comprises a power input section 1.1 and a power output section 1.2, a transmission connecting part 1.3 used for forming transmission fit with the connecting piece 2, an interference connecting part 1.4 tightly matched with the inner wall of the connecting piece 2 and a limiting piece 1.6 limited in the first axial direction of the connecting piece 2 are arranged on the power input section 1.1, the connecting piece 2 limits the axial position through the interference connecting part 1.4, and a deflection and play gap 17.1 between the connecting piece and the transmission rod 1 is eliminated.

The above-described first direction coincides with the fitting direction of the connector 2.

As shown in fig. 1 to 4, in the present embodiment, the driving wheel 3 refers to a worm wheel, the driving rod 1 refers to a screw rod, the connecting piece 2 refers to a shaft sleeve member sleeved on the power input section 1.1 of the driving rod 1, the worm wheel is connected with the motor 4 through the worm 5, the motor 4 as the power input unit is L-shaped arranged with the driving rod 1 thanks to the arrangement of the worm wheel and the worm 5, and a reduction ratio is provided through the worm and the worm wheel 5, without arranging a reduction gearbox between the motor 4 and the screw rod, thereby reducing the overall volume.

The worm gear integrated injection molding is performed on the shaft sleeve component, the connecting piece 2 and the transmission rod 1 are metal pieces, the transmission connecting part 1.3 refers to a spline 2.3 formed on the power input section 1.1, the inner wall of the connecting piece 2 is matched with the spline 2.3, and the interference butt joint part 2.4 corresponding to the interference connecting part 1.4 is arranged on the inner wall of the connecting piece 2, so that synchronous rotation of the transmission rod 1, the connecting piece 2 and the transmission wheel 3 is realized.

It should be noted that the driving wheel 3 is not limited to a worm wheel, but may be other driving members capable of transmitting torque with the driving rod 1, such as a spur gear.

The transmission gear is arranged as a connecting piece 2 at the center shaft position in a split way, and a transmission wheel 3 formed on the connecting piece 2, torque is input by the transmission wheel 3, power is output to the transmission rod 1 through the connecting piece 2, and then the transmission rod 1 is driven to rotate, the connecting piece 2 is connected with the transmission rod 1 by adopting a metal piece, and the transmission wheel 3 can be a plastic piece, so that the cost is reduced, and the weight of a transmission part is reduced;

the transmission rod 1 and the connecting piece 2 are limited in axial position through the interference connection part 1.4, synchronous rotation is realized through the transmission connection part 1.3, stable transmission between the transmission rod 1 and the connecting piece 2 is ensured, an assembly gap 17.1 between the transmission rod 1 and the connecting piece 2 is eliminated through a partial interference fit part, and deflection and collision generated by the gap 17.1 between the transmission rod 1 and the connecting piece 2 are avoided.

Preferably, the interference connection part 1.4 is arranged between the transmission connection part 1.3 and the power output section 1.2 so that the connecting piece 2 and the transmission rod 1 form interference fit in the assembly direction, wherein the interference connection part 1.4 is arranged in a step mode, the inner wall of the connecting piece 2 is provided with another matched step, the two steps are arranged oppositely, and optionally, 1000N acting force is applied to the interference connection part 1.4 through an external tool so that reliable and stable fit is formed between the transmission rod 1 and the connecting piece 2.

Alternatively, the stop 1.6 is arranged close to the interference connection 1.4, so that the stop 1.6 is arranged as an end of the fitting direction of the connection 2, the purpose of which is to further limit the axial position of the connection 2, in particular the axial first direction of the connection 2.

Specifically, a limiting groove 1.5 is formed in the power input section 1.1, a limiting piece 1.6 is clamped in the limiting groove 1.5 and abuts against the end portion of the connecting piece 2 in the first axial direction, wherein the limiting piece 1.6 can be a limiting stop ring, and the other purpose of the limiting piece 1.6 is to limit the position of the transmission rod 1 in the first axial direction and prevent the transmission rod 1 from falling off in the first axial direction.

Preferably, the axial length of the transmission connection part 1.3 on the power input section 1.1 is D1, the axial length of the interference connection part 1.4 on the power input section 1.1 is D2, wherein the transmission connection part 1.3 covers the projection of the transmission wheel 3 in the radial direction, and the ratio of D1 to D2 satisfies 2-2.85.

As shown in fig. 4, as a further embodiment of the connecting piece 2 and the driving wheel 3, the connecting piece 2 is provided with an annular body 2.1 corresponding to the transmission connection part 1.3, the annular body 2.1 is deviated from the interference connection part 1.4, the driving wheel 3 is integrally embedded on the annular body 2.1 and the connecting piece 2, and the arrangement of the annular body 2.1 provides a joint part for the driving wheel 3 embedded on the connecting piece 2, so that the integration of the driving wheel 3 and the connecting piece 2 is improved.

Specifically, a plurality of material passing holes 2.2 are formed in the annular body 2.1 in the circumferential direction, and the driving wheel 3 is tightly connected with the annular body 2.1 through the material passing holes 2.2.

The driving wheel 3 is specifically formed on the front end face and the rear end face of the annular body 2.1 in an extending mode, the extending portion is arranged in the radial direction relative to the annular body 2.1, and the flowing material can pass through the material passing holes 2.2 to the front end face and the rear end face of the annular body 2.1 so that the driving wheel 3 is tightly connected with the connecting piece 2 to form an integral worm gear component.

As shown in fig. 5 to 7, in other embodiments, the noise reduction effect of the whole transmission is improved by further improving the transmission system formed by the output end of the motor 4 and the worm wheel, the output end of the motor 4 is provided with a first adapter piece 6, the worm 5 is provided with a second adapter piece 7, the end part of the worm 5 is in plug-in transmission with the middle part of the second adapter piece 7, the first adapter piece 6 is in plug-in transmission with the peripheral side of the second adapter piece 7, the first adapter piece 6 is fixedly matched with the output end of the motor 4 and is provided with a fork-shaped connecting part, the second adapter piece 7 is provided with a first plug-in groove 7.1 corresponding to the fork-shaped connecting part 6.1, and arrange the second grafting groove 7.2 at first grafting groove 7.1 middle part, worm 5 tip is equipped with the transmission convex part 5.1 of a word, this transmission convex part 5.1 peg graft to in the second grafting groove 7.2, and first adaptor 6, second adaptor 7 are all supported with the transmission convex part 5.1 on the worm 5 tip and are connected, in order to realize the stable transmission of transmission system between motor 4 and the worm 5, through above improvement, through the flexible connection between first adaptor 6 and the second adaptor 7 realization motor 4 output and the worm 5, effectively eliminate the radial float of motor 4 output shaft work, reduce the influence that the concentricity brought.

Preferably, the first adapter 6 and the second adapter 7 are optionally flexible connectors 2.

Specifically, the device also comprises a shell 17 with a built-in cavity, the driving wheel 3 and the worm 5 are restrained to rotate in the cavity, and a gap 17.1 is arranged at any boundary between the driving wheel 3 and the inner cavity, so that collision between the driving wheel 3 and the shell 17 is further avoided.

Wherein, motor 4 sets up in casing 17, and the axial both ends that casing 17 corresponds casing 17 all are equipped with the cushion, specifically include the butt first cushion 17.2 between motor 4 terminal surface and casing 17 to and interference cover and at motor 4 tail end's second cushion 17.3, cancel the play clearance 17.1 between motor 4 and the casing 17 through first cushion 17.2 and second cushion 17.3, further reduce motor 4's noise, realize the silence effect of whole transmission system.

As shown in fig. 8 to 10, the present utility model further provides an L-shaped stay bar, which comprises the above-mentioned worm wheel fixing structure, and further comprises a power output area 8 and a power input area 9 which are arranged in an L-shape, and an upper ball socket assembly 10 formed at the power output area 8, and a lower ball socket assembly 11 formed at the power input area 9, wherein the power output section 1.2 on the transmission rod 1 is arranged in the power output area 8 in the same direction, the power input section 1.1 on the transmission rod 1 is connected between the power output area 8 and the power input area 9, the power input section 1.1 extends into the power input area 9, and a guiding assembly 12 connecting the upper ball socket assembly 10 and the transmission rod 1 is further arranged in the power output area 8.

Specifically, a bearing seat 13 and a housing 17 are further disposed between the power output area 8 and the power input area 9, the housing 17 defines the outline of the power input area 9, and the housing 17 is fixedly connected with the bearing seat 13.

The bearing seat 13 axially constrains the transmission rod 1 to be linearly separated, and allows the transmission rod 1 to axially unscrew from the bearing seat 13 for assembling the connecting piece 2 and the transmission rod 1, meanwhile, the bearing seat 13 also constrains the guide assembly 12, and limits the guide assembly 12 to be linearly separated, so that after the transmission rod 1 and the guide assembly 12 are assembled on the bearing seat 13, only the power input section 1.1 of the transmission rod 1 extends out of the bearing seat 13, and the guide assembly 12 and the transmission rod 1 are both limited to be separated, so that the power input area 9 is assembled.

As a further embodiment of the guide assembly 12, the guide assembly 12 includes:

the guide tube 12.1 is fixedly connected with the bearing seat 13, and a movable cavity tube is formed in the guide tube 12.1;

the movable tube 12.2 and the nut piece 12.3, the movable tube 12.2 is sleeved in the guide tube 12.1 and moves axially along the movable cavity under the drive of the screw rod, the nut piece 12.3 is connected with the screw rod and integrally formed on the movable tube 12.2, wherein the movable tube 12.2 is in spin riveting connection with the upper ball socket assembly 10 so as to drive the upper ball socket assembly 10 to extend or retract;

the spring 12.4 is sleeved between the bearing seat 13 and the upper ball socket assembly 10, and spiral grooves 16 which are in spiral match with the end parts of the spring 12.4 are formed in the outer walls of the bearing seat 13 and the upper ball socket assembly 10.

The bearing support 13 is provided with a first bearing 14, and the first bearing 14 abuts against and limits the axial positions of the movable tube 12.2 and the nut member 12.3.

Wherein, the shell 17 is provided with a second bearing 15, the second bearing 15 is limited between the shell 17 and the bearing seat 13, and the limiting piece 1.6 is abutted between the second bearing 15 and the connecting piece 2, and meanwhile, the limiting piece 1.6 is also clamped in the limiting groove 1.5 of the transmission rod 1 so as to limit the transmission rod 1 from falling out along the first direction.

Limit of the guide tube 12.1 and the bearing seat 13: the inner wall of the bearing seat 13 is provided with limit convex parts 13.1, the limit convex parts 13.1 are arranged at intervals in the circumferential direction, the limit convex parts 13.1 are also arranged at intervals in the axial direction, and the guide tube 12.1 is provided with limit hole sites 12.12 corresponding to the limit convex parts 13.1 so as to limit the guide tube 12.1 on the bearing seat 13.

Movable tube 12.2 and guide tube 12.1: the guide tube 12.1 is provided with guide grooves 12.11 extending in the axial direction on the inner wall, the guide grooves 12.11 are also arranged at intervals in the circumferential direction, guide convex parts 12.31 matched with the guide grooves 12.11 are arranged at the peripheral end parts of the nut piece 12.3 and/or the movable tube 12.2, and the movable tube 12.2 moves in the axial direction in the guide tube 12.1 through the matching of the guide convex parts 12.31 and the guide grooves 12.11.

The present embodiment is only for explanation of the present utility model and is not to be construed as limiting the present utility model, and modifications to the present embodiment, which may not creatively contribute to the present utility model as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present utility model.

Claims

1. A worm wheel fixing structure, characterized by comprising:

including axial positioning's transfer line (1), cup joint connecting piece (2) on transfer line (1) to and constitute drive wheel (3) on connecting piece (2), transfer line (1) are including power input section (1.1) and power take off section (1.2), be equipped with on power input section (1.1) be used for constituting transmission complex transmission connecting position (1.3) with connecting piece (2), with connecting piece (2) inner wall tight fit's interference connecting position (1.4), transfer line (1) and connecting piece (2) cancel beat and drunkenness clearance (17.1) through interference connecting position (1.4), and inject connecting piece (2) axial position.

2. A worm gear fixing structure according to claim 1, wherein: the interference connection point (1.4) is arranged between the transmission connection point (1.3) and the power take-off section (1.2).

3. A worm gear fixing structure according to claim 1, wherein: the power input section (1.1) is provided with a limiting groove (1.5), a limiting piece (1.6) is clamped on the limiting groove (1.5), and the limiting piece (1.6) is arranged close to or in butt joint with the interference connection part (1.4).

4. A worm gear fixing structure according to claim 1, wherein: the driving wheel (3) is a worm wheel, the worm wheel is connected with a motor (4) through a worm (5), and the motor and the driving rod (1) are arranged in an L shape.

5. A worm gear fixing structure according to claim 1, wherein: the connecting piece (2) is provided with an annular body (2.1) corresponding to the transmission connecting part (1.3), and the transmission wheel (3) is integrally embedded on the annular body (2.1) and the connecting piece (2).

6. The worm wheel securing structure as claimed in claim 5, wherein: the annular body (2.1) is provided with a plurality of material passing holes (2.2) in the circumferential direction, and the driving wheel (3) is tightly connected with the annular body (2.1) through the material passing holes (2.2).

7. The worm wheel securing structure as claimed in claim 4, wherein: the novel electric motor is characterized in that a first adapter (6) is arranged at the output end of the motor (4), a second adapter (7) is arranged on the worm (5), the end part of the worm (5) is in plug-in transmission with the middle part of the second adapter (7), and the first adapter (6) is in plug-in transmission with the peripheral side of the second adapter (7).

8. A worm gear fixing structure according to claim 1, wherein: the device also comprises a shell (17) with a cavity inside, the driving wheel (3) is restrained to rotate in the cavity, and a gap (17.1) is arranged at any boundary between the driving wheel (3) and the cavity.

9. An L-shaped stay including the worm wheel securing structure according to any one of claims 1 to 8, characterized in that: the power output section (1.2) is arranged in the power output area (8) in the same direction, the power input section (1.1) is arranged in the power input area (9), and a guide assembly (12) connected with the upper ball socket assembly (10) and the transmission rod (1) is further arranged in the power output area (8).

10. An L-shaped brace bar according to claim 9 wherein: a bearing seat (13) and a shell (17) are further arranged between the power output area (8) and the power input area (9), the shell (17) defines the outline of the power input area (9), the transmission rod is axially restrained to rotate in the bearing seat (13), the power input section (1.1) of the transmission rod (1) extends out of the guide assembly (12) and enters the power input area (9), and the shell (17) is fixedly connected with the bearing seat (13).