CN113217562A

CN113217562A - Worm gear brake

Info

Publication number: CN113217562A
Application number: CN202110353379.4A
Authority: CN
Inventors: 杨琪; 沈宝良; 叶国强; 刘艳春
Original assignee: Ningbo Xintai Machinery Co Ltd
Current assignee: Ningbo Xintai Machinery Co Ltd
Priority date: 2021-04-01
Filing date: 2021-04-01
Publication date: 2021-08-06

Abstract

The invention belongs to the technical field of electric support rods, and provides a worm gear brake which comprises a motor worm assembly, a worm wheel, a brake pushing assembly, a friction assembly, a spring and a shell. The invention has the advantages that the torque of the brake can be adjusted by controlling the worm gear mechanism of the motor through the ECU according to different working conditions; by the worm gear self-locking principle, after the ECU adjusts the brake torque, the torque value can be maintained under the condition of no electrification; the internal resistance in the electric stay bar/driving mechanism is ensured to be adjustable, and when the electric stay bar/driving mechanism is assembled on the whole vehicle, the functions of electric/manual opening and closing, hovering and the like of the vehicle door under various working conditions are met; when the brake works, the brake has the advantages of rapid brake adjustment, quick response, low noise in operation and the like.

Description

Worm gear brake

Technical Field

The invention belongs to the technical field of electric support rods and relates to a worm gear brake.

Background

Along with the automatic and intelligent development of automobiles, the demand of an automatic door opening and closing mechanism of the automobiles is more and more large, the automobile using experience of users is greatly improved, and the convenience of the users is enhanced. The mechanism has high practicability, realizes automatic opening and closing of the automobile door, and brings convenience for people to go out. However, due to the influence factors of gradient/temperature/door opening angle, the hovering function of the vehicle door under a reasonable limit working condition cannot be guaranteed, or light manual operation force is required when the door is manually opened or closed under different working conditions. Therefore, an adjustable brake is required to be added in a driving mechanism, the internal resistance of the mechanism is automatically changed through the control of an ECU (electronic control Unit) and the like in the whole door opening and closing process, so that the hovering of a vehicle door under various working conditions, the proper door opening and closing manual force and the like are realized, the braking torque of the brake in the conventional electric support rod/driving mechanism is usually a fixed value and cannot be adjusted, so that the internal resistance of the electric support rod/driving mechanism is constant and cannot be adjusted, and after the hovering and the electric/manual functions under various working conditions on a flat slope are met, abnormal door opening and closing easily occurs under extreme working conditions (such as ascending slope, descending slope, side slope and the like), the conventional brake is an electromagnetic brake and is usually expressed in the form that: the power-on braking and the power-off braking generate smaller torque value under the same external dimension. The other two brakes have obvious defects, namely electrification braking: when braking, continuous energization is needed, braking is generated, and the current is large and is larger than 0.5A; power-off braking: although braking can be generated when the electric switch is not energized, the electric switch needs to be energized continuously to cancel the braking function. The two conditions cause great waste to the power supply of the whole vehicle, the storage battery is easy to generate power shortage, meanwhile, the long-term electrification causes the lead to generate heat quickly, serious accidents such as fire and the like are easy to generate, even some electric stay bar/driving mechanisms in the market have no brake, the vehicle door can only be hovered at each angle in a flat slope state at normal temperature, abnormal conditions such as large-angle rebound/falling of the vehicle door occur in the upward slope and the downward slope at normal temperature, the electric/manual vehicle door opening and closing are seriously influenced, and the vehicle door is easy to fall/rebound to cause user injuries and other abnormal conditions.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a worm gear brake aiming at the current situation of the prior art, the torque value can be maintained by utilizing the condition that the worm gear self-locking principle is not electrified, the brake is adjusted quickly, and the response is quick.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a worm gear stopper, its characterized in that promotes subassembly, friction assembly, spring and casing including motor worm assembly, worm wheel, stopper, motor worm assembly and worm wheel auto-lock be connected, the worm wheel promotes the subassembly with the stopper and is connected, the friction assembly arrange in between stopper promotion subassembly and the spring, spring one end links to each other with the casing, the other end links to each other with the friction assembly, motor worm assembly rotatory drive worm wheel rotatory, the worm wheel is rotatory to drive stopper and promotes the subassembly and produce axial displacement with spring compression to different height and produce different spring compressive forces to thereby the reaction produces different friction braking force in friction assembly.

In foretell worm gear stopper, stopper promotion subassembly include stopper ejector pad and stopper briquetting, the outside of stopper ejector pad be equipped with the cylinder boss, seted up the hole recess on the stopper briquetting, the cylinder boss inserts and connects stopper ejector pad and stopper briquetting as an organic whole in the hole recess.

In the above worm gear brake, the brake push block has a spiral inclined plane on the edge of the brake push block, the brake press block has a spiral inclined plane on the edge of the brake press block, the spiral inclined plane is matched with the spiral inclined plane of the brake push block, and the brake push block is matched with the two spiral inclined planes after rotating, so that the brake press block is pushed to generate axial displacement.

In the above worm gear brake, the brake press block is externally provided with a jaw mechanism, a clamping groove matched with the jaw mechanism is arranged in the shell, and the jaw mechanism is matched with the clamping groove of the shell to limit radial rotation.

In the above worm gear brake, the worm wheel has a bearing, and the worm wheel is radially fixed by the bearing.

In the above worm gear brake, the right end face of the worm wheel is provided with a fixing groove, the brake push block is provided with a claw connected with the fixing groove, the worm wheel is connected with the brake push block and radially transmits torque, and the worm wheel rotates to drive the brake push block to rotate.

In the above worm gear brake, the friction assembly includes a brake pressing sheet and a friction component, the brake pressing sheet is connected with the friction component at intervals, and the brake pressing sheet has multiple groups of friction components.

In the above worm gear brake, each group of friction components comprises a transmission gear ring and friction plates, the friction plates are respectively arranged on two sides of the transmission gear ring to form the friction components, and a spline hole is formed in the transmission gear ring.

In the above worm gear brake, the motor end of the motor-worm assembly is provided with a seam allowance and used for radial positioning of the motor, and the tail of the motor is provided with an end face and used for axial positioning of the motor-worm assembly.

Compared with the prior art, the invention has the advantages that the torque of the brake can be adjusted by controlling the worm gear mechanism of the motor through the ECU according to different working conditions; by the worm gear self-locking principle, after the ECU adjusts the brake torque, the torque value can be maintained under the condition of no electrification; the internal resistance in the electric stay bar/driving mechanism is ensured to be adjustable, and when the electric stay bar/driving mechanism is assembled on the whole vehicle, the functions of electric/manual opening and closing, hovering and the like of the vehicle door under various working conditions are met; when the brake works, the brake has the advantages of rapid brake adjustment, quick response, low noise during operation and the like; the mechanism has small overall dimension and small occupied space, and can meet the assembly requirements of different occasions.

Drawings

FIG. 1 is a schematic sectional view of the worm gear brake;

FIG. 2 is a schematic view of the exploded structure of the present worm gear brake (housing and spindle not shown);

FIG. 3 is a schematic view of the internal structure of the present worm gear brake;

fig. 4 is a profile view of the brake push block and the brake press block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting to the scope of the present invention.

In the drawings, a motor worm assembly 100; a worm gear 200; a fixing groove 201; a brake actuating assembly 300; a brake pusher block 301; a jaw 3011; the brake push block spiral ramp 3012; a cylindrical boss 3013; a brake pressure block 302; a jaw mechanism 3021; the brake press block is provided with a spiral inclined surface 3022; an inner bore recess 3023; a friction assembly 400; a transmission ring gear 401; a splined bore 4011; a friction plate 402; a brake pad 403; a spring 500; a housing 600; a card slot 601; a bearing 700; a main shaft 800.

As shown in fig. 1, the worm gear brake mainly includes a motor and worm assembly 100, a worm wheel 200, a brake pushing component 300, a friction assembly 400, a spring 500 and a housing 600, wherein a motor end of the motor and worm assembly 100 is provided with a spigot and used for radial positioning of the motor, and a motor tail is provided with an end face and used for axial positioning of the motor and worm assembly 100, and the whole worm gear brake has small overall dimension and small occupied space, and can meet the assembly requirements of different occasions, except that the motor and worm assembly 100 is assembled by a staggered shaft, the rest are in axial assembly relation.

Specifically, the worm wheel 200 is provided with a bearing 700, and the worm wheel 200 is radially fixed through the bearing 700, so that the motor and worm assembly 100 is electrified to generate worm rotation to drive the connected worm wheel 200 to rotate, reduction ratio related parameters such as the number of worm heads, the number of teeth of the worm wheel 200 and the like can be set according to actual needs, stability is ensured, the motor and worm assembly 100 is in self-locking connection with the worm wheel 200, that is, the motor and worm assembly 100 rotates to drive the worm wheel 200 to rotate; however, the worm wheel 200 cannot drive the motor and worm assembly 100 to rotate to form reverse self-locking, the worm wheel 200 is connected with the brake pushing assembly 300, the brake pushing assembly 300 comprises a brake pushing block 301 and a brake pressing block 302, a fixing groove 201 is formed in the right end face of the worm wheel 200, a clamping jaw 3011 connected with the fixing groove 201 is arranged on the brake pushing block 301, the worm wheel 200 is connected with the brake pushing block 301 and transmits torque in the radial direction, and the worm wheel 200 rotates to drive the brake pushing block 301 to rotate.

As shown in fig. 4, the outer edge of the brake push block 301 is provided with a brake push block spiral inclined surface 3012, the outer edge of the brake press block 302 is provided with a brake press block spiral inclined surface 3022 matched with the brake push block spiral inclined surface 3012, the brake push block 301 is matched with the two spiral inclined surfaces after rotating, so as to push the brake press block 302 to generate axial displacement, here, the two spiral inclined surfaces change the rotation of the brake push block 301 into the axial displacement motion applied to the brake press block 302, and the brake press block 302 presses the friction assembly 400 after moving, so as to change the torque of the friction assembly 400.

In addition, this patent can be through worm gear auto-lock principle, ECU adjusts the stopper moment of torsion after, also can maintain this moment of torsion value in the circumstances of not circular telegram, satisfy the door and at the electronic/manual switching of each operating mode, functions such as hover, and stopper briquetting 302 outside is equipped with jaw mechanism 3021, be provided with jaw mechanism 3021 matched with draw-in groove 601 in casing 600, jaw mechanism 3021 cooperates with casing 600 draw-in groove 601 and restricts radial rotation, for the convenience of assembling, the outside of stopper ejector pad 301 is equipped with cylinder boss 3013, seted up hole recess 3023 on stopper briquetting 302, cylinder boss 3013 inserts hole recess 3023 and connects stopper ejector pad 301 and stopper briquetting 302 as an organic whole with stopper ejector pad 301.

As shown in fig. 2 and 3, the friction assembly 400 is disposed between the brake pushing assembly 300 and the spring 500, one end of the spring 500 is connected to the housing 600, and the other end of the spring is connected to the friction assembly 400, specifically, the friction assembly 400 includes a brake pressing sheet 403 and friction components, the brake pressing sheet 403 is connected to the friction components at intervals and has a plurality of sets of friction components, each set of friction components includes a transmission gear 401 and friction sheets 402, two sides of the transmission gear 401 are respectively provided with one friction sheet 402 to form a friction component, the friction sheets 402 are ultra-thin and made of carbon fiber, and the number of the friction sheets 402, the transmission gear 401 and the brake pressing sheet 403 can be set according to the actual friction force, wherein the motor worm assembly 100 rotates to drive the worm wheel 200 to rotate, the worm wheel 200 rotates to drive the brake pushing block 301 to rotate, the brake pushing block 301 acts on the brake pressing sheet 302 to generate axial displacement to compress the spring 500 to different heights to generate different compression forces of the spring 500, the brake device has the advantages that the brake torque can be adjusted, the internal resistance of the mechanism can be adjusted, the opening and closing of a vehicle door and proper manual operating force can be met, when the brake works, the brake adjustment is rapid, the response is rapid, the noise during the operation is low, and the like.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the described embodiments may be made by those skilled in the art without departing from the scope and spirit of the invention as defined by the accompanying claims.

Claims

1. The utility model provides a worm gear stopper, its characterized in that promotes subassembly, friction assembly, spring and casing including motor worm assembly, worm wheel, stopper, motor worm assembly and worm wheel auto-lock be connected, the worm wheel promotes the subassembly with the stopper and is connected, the friction assembly arrange in between stopper promotion subassembly and the spring, spring one end links to each other with the casing, the other end links to each other with the friction assembly, motor worm assembly rotatory drive worm wheel rotatory, the worm wheel is rotatory to drive stopper and promotes the subassembly and produce axial displacement with spring compression to different height and produce different spring compressive forces to thereby the reaction produces different friction braking force in friction assembly.

2. The worm and gear brake as claimed in claim 1, wherein the brake pushing assembly includes a brake pushing block and a brake pressing block, a cylindrical boss is provided outside the brake pushing block, an inner hole groove is provided on the brake pressing block, and the cylindrical boss is inserted into the inner hole groove to connect the brake pushing block and the brake pressing block into a whole.

3. The worm and gear brake as claimed in claim 2, wherein the brake push block has an outer peripheral edge provided with a spiral inclined surface of the brake push block, and an outer peripheral edge of the brake press block is provided with a spiral inclined surface of the brake press block matched with the spiral inclined surface of the brake push block, and the brake push block is rotated to be matched with the two spiral inclined surfaces, so as to push the brake press block to generate axial displacement.

4. The worm and gear brake as claimed in claim 2 or 3, wherein the brake pressing block is externally provided with a jaw mechanism, a clamping groove matched with the jaw mechanism is arranged in the shell, and the jaw mechanism is matched with the clamping groove of the shell to limit radial rotation.

5. The worm-gear brake as claimed in claim 1, wherein the worm wheel has a bearing, and the worm wheel is radially fixed by the bearing.

6. The worm and gear brake as claimed in claim 2 or 3, wherein the right end surface of the worm wheel is provided with a fixing groove, the brake push block is provided with a claw connected with the fixing groove, the worm wheel is connected with the brake push block and radially transmits torque, and the worm wheel rotates to drive the brake push block to rotate.

7. The worm and gear brake as claimed in claim 2 or 3, wherein the friction assembly comprises a brake pad and friction members, the brake pad is connected with the friction members at intervals and has a plurality of sets of friction members.

8. The worm and gear brake as claimed in claim 7, wherein each set of friction assembly includes a driving gear ring and a friction plate, the driving gear ring is provided with a friction plate on both sides to form the friction assembly, and the driving gear ring is provided with a splined hole inside.

9. The worm and gear brake as claimed in claim 1, wherein the motor end of the motor and worm assembly is provided with a spigot for radial positioning of the motor, and the motor tail is provided with an end face for axial positioning of the motor and worm assembly.