阅读说明：本技术 双向联动式自动皮带张紧装置 (Bidirectional linkage type automatic belt tensioning device ) 是由 花正明 许秋海 陈链 缪明 于 2020-06-10 设计创作，主要内容包括：本发明涉及一种双向联动式自动皮带张紧装置,包括组件相同且可联动的左自动皮带张紧组件和右自动皮带张紧组件；左自动皮带张紧组件和右自动皮带张紧组件对称安装在联动机构上；左自动皮带张紧组件包括带中心回转轴的底座、旋转张紧臂、螺旋弹簧和皮带轮；旋转张紧臂覆盖在底座之上并通过第二螺栓固定连接,并且通过第一螺栓连接与发动机皮带贴合的可转动的皮带轮；螺旋弹簧套在中心回转轴上,且螺旋弹簧的一侧抵接底座,螺旋弹簧的另一侧抵接旋转张紧臂；联动机构包括同轴安装的安装基座、转动盘和第一铆接板。本发明可以实现发电机左右两侧皮带进行松紧边互换时,通过左右两个自动皮带张紧装置进行时时补偿。(The invention relates to a bidirectional linkage type automatic belt tensioning device which comprises a left automatic belt tensioning assembly and a right automatic belt tensioning assembly, wherein the left automatic belt tensioning assembly and the right automatic belt tensioning assembly are identical in assembly and can be linked; the left automatic belt tensioning assembly and the right automatic belt tensioning assembly are symmetrically arranged on the linkage mechanism; the left automatic belt tensioning assembly comprises a base with a central rotating shaft, a rotary tensioning arm, a spiral spring and a belt pulley; the rotary tensioning arm covers the base, is fixedly connected with the base through a second bolt, and is connected with a rotatable belt pulley attached to an engine belt through a first bolt; the spiral spring is sleeved on the central rotating shaft, one side of the spiral spring is abutted against the base, and the other side of the spiral spring is abutted against the rotary tensioning arm; the linkage mechanism comprises a mounting base, a rotating disc and a first riveting plate which are coaxially mounted. The invention can realize real-time compensation by the left and right automatic belt tensioning devices when the belts on the left and right sides of the generator exchange elastic edges.)

1. The utility model provides an automatic belt tightener of two-way coordinated type which characterized in that: comprises a left automatic belt tensioning assembly (100) and a right automatic belt tensioning assembly (200); the left automatic belt tensioning assembly (100) and the right automatic belt tensioning assembly (200) are symmetrically arranged on a linkage mechanism (300), and the left automatic belt tensioning assembly (100) and the right automatic belt tensioning assembly (200) can be linked;

the left automatic belt tensioner assembly (100) comprises a base (401) with a central pivot shaft (403), a rotary tensioner arm (410), a coil spring (405) and a pulley (406); the rotary tensioning arm (410) comprises a first connection and a second connection; the first connecting part covers the base (401) and is fixedly connected with the base through a second bolt (414), and the second connecting part is connected with a rotatable belt pulley (406) attached to an engine belt through a first bolt (404); the spiral spring (405) is sleeved on the central rotating shaft (404), one side of the spiral spring (405) is abutted against the base (401), and the other side of the spiral spring (405) is abutted against the rotary tensioning arm (410);

the right automatic belt tensioning assembly (200) and the left automatic belt tensioning assembly (100) are identical;

the linkage mechanism (300) comprises a mounting base (301), a rotating disc (303) and a first riveting plate (307); the mounting base (301), the rotating disc (303) and the first riveting plate (307) are coaxially mounted; a first bearing (302) for bearing load is arranged between the mounting base (301) and the rotating disc (303); and a nylon friction plate (306), a friction plate supporting gasket (305) and a wave spring (304) are arranged between the rotating disc (303) and the first riveting plate (307).

2. The bi-directional linkage type automatic belt tensioner as claimed in claim 1, wherein: the left automatic belt tensioning assembly (100) further comprises a supporting ring (408) and a friction ring (409) which are clamped with each other; the outer wall of the friction ring (409) is in sliding contact with the inner wall of the base (401); the helical spring (405) is pre-expanded in the bearing ring (408).

3. The bi-directional linkage type automatic belt tensioner as claimed in claim 1, wherein: the left automatic belt tensioner assembly (100) further comprises a second rivet plate (413), a sliding washer (412) and a sliding bushing (411); the first connecting part is internally penetrated through the sliding bushing (411) and is in sliding contact with the inner wall of the central revolving shaft (403); the first connecting portion embeds the second riveting plate (413) and the sliding washer (412), and the second riveting plate (413) and the sliding washer (412) prevent the second bolt (414) from loosening.

4. The bi-directional linkage type automatic belt tensioner as claimed in claim 1, wherein: the left automatic belt tensioning assembly (100) further comprises a second bearing (407); the second bearing (407) is pressed into the inner bore of the pulley (406), and the second bearing (407) bears a load.

5. The bi-directional linkage type automatic belt tensioner as claimed in claim 1, wherein: the turn disc (303) comprises a chassis; and the supporting part for installing the left automatic belt tensioning assembly and the supporting part for installing the right automatic belt tensioning assembly are symmetrically arranged and protrude out of the chassis.

6. The bi-directional linkage type automatic belt tensioner as claimed in claim 1, wherein: the helical spring (405) is a tension wheel torsion spring.

7. The bi-directional linkage type automatic belt tensioner as claimed in claim 1, wherein: the wave spring (304) is a thin annular elastic metal element comprising a plurality of wave crests and wave troughs and can bear the axial pre-pressure of the bidirectional linkage type automatic belt tensioning device.

8. The bi-directional linkage type automatic belt tensioner as claimed in claim 1, wherein: the first bearing (302) is a self-lubricating bearing.

Technical Field

The invention relates to the technical field of belt tensioning devices of belt trains of automobile engine starting and stopping systems, in particular to a bidirectional linkage type automatic belt tensioning device.

Background

At present, an automobile starting and stopping system generally drives an automobile crankshaft belt wheel by a power generation starting all-in-one machine through a transmission belt so as to drive an engine to start. In an engine belt wheel system of an automobile belt start-stop system, an automatic belt tensioning device is generally arranged on the left side of a belt wheel of a power generation start-up all-in-one machine, and an idler wheel which can not adjust the tensioning force of a belt is adopted on the right side. For example: a belt start-stop train for use in a vehicle start-stop system is disclosed in the document entitled "belt start-stop train" with application number 201620656104.2, and its start-stop principle is disclosed.

When the automobile runs normally, the left side of the power generation starting all-in-one machine is a belt loose edge, and the automatic belt tensioning device works to provide belt tensioning force for accessories in a belt wheel train; when the automobile is started after being temporarily stopped (for example, at a traffic light), the automobile provided with the start-stop system needs to be started by the power generation and start integrated machine to provide starting power to drive the crankshaft, at the moment, the elastic edges on the two sides of the power generation and start integrated machine are changed, the right side of the power generation and start integrated machine is changed to be an elastic edge, and an idler pulley cannot automatically tension a belt to ensure reasonable belt tension of an engine belt train, so that the belt slipping phenomenon is generated, abnormal sound is generated, and the service lives of the belt and accessories in the engine belt train, the automatic belt tensioning device and the idler pulley are.

Disclosure of Invention

Aiming at the defects of the prior art, the invention discloses a bidirectional linkage type automatic belt tensioning device.

The technical scheme adopted by the invention is as follows:

a bidirectional linkage type automatic belt tensioning device comprises a left automatic belt tensioning assembly and a right automatic belt tensioning assembly; the left automatic belt tensioning assembly and the right automatic belt tensioning assembly are symmetrically arranged on a linkage mechanism, and can be linked;

the left automatic belt tensioning assembly comprises a base with a central rotating shaft, a rotary tensioning arm, a spiral spring and a belt pulley; the rotary tensioning arm comprises a first connection and a second connection; the first connecting part covers the base and is fixedly connected with the base through a second bolt, and the second connecting part is connected with a rotatable belt pulley attached to an engine belt through the first bolt; the spiral spring is sleeved on the central rotating shaft, one side of the spiral spring is abutted to the base, and the other side of the spiral spring is abutted to the rotary tensioning arm;

the right automatic belt tensioning assembly is identical to the left automatic belt tensioning assembly;

the linkage mechanism comprises a mounting base, a rotating disc and a first riveting plate; the mounting base, the rotating disc and the first riveting plate are coaxially mounted; a first bearing for bearing load is arranged between the mounting base and the rotating disc; and a nylon friction plate, a friction plate supporting gasket and a wave spring are arranged between the rotating disc and the first riveting plate.

The method is further characterized in that: the left automatic belt tensioning assembly further comprises a supporting ring and a friction ring which are clamped with each other; the outer wall of the friction ring is in sliding contact with the inner wall of the base; the coil spring is pre-tensioned within the support ring.

The method is further characterized in that: the left automatic belt tensioning assembly further comprises a second riveting plate, a sliding gasket and a sliding bushing; the first connecting part penetrates through the sliding bushing and is in sliding contact with the inner wall of the central revolving shaft; the first connecting portion is embedded in the second riveting plate and the sliding gasket, and the second riveting plate and the sliding gasket prevent the second bolt from loosening.

The method is further characterized in that: the left automatic belt tensioning assembly further comprises a second bearing; the second bearing is pressed into the inner hole of the belt pulley and bears load.

The method is further characterized in that: the rotating disc comprises a chassis; and the supporting part for installing the left automatic belt tensioning assembly and the supporting part for installing the right automatic belt tensioning assembly are symmetrically arranged and protrude out of the chassis.

The method is further characterized in that: the spiral spring is a tension wheel torsion spring.

The method is further characterized in that: the wave spring is a thin annular elastic metal element comprising a plurality of wave crests and wave troughs and can bear the axial pre-pressure of the bidirectional linkage type automatic belt tensioning device.

The method is further characterized in that: the first bearing is a self-lubricating bearing.

The invention has the following beneficial effects:

1. the invention solves the problems that the engine belt wheel train system can smoothly switch the belt tightness edge in the running and starting processes of the automobile with the start-stop system, ensures that the belt wheel train system does not slip, does not generate noise and the like, prolongs the service life of each accessory in the automobile engine belt wheel train, reduces the energy loss of the automobile and reduces the pollution of emission to the environment.

2. In an automobile belt transmission gear train provided with an engine starting and stopping system, the invention can realize real-time compensation through the left automatic belt tensioning assembly and the right automatic belt tensioning assembly when the elastic sides of the left and right belts of the generator are exchanged.

3. The invention effectively improves the running stability of the belt start-stop gear train in the vehicle start-stop system.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an exploded view of the present invention.

Fig. 3 is an exploded view of the linkage.

Fig. 4 is a top view of the present invention.

Fig. 5 is a cross-sectional view taken at a-a in fig. 4.

In the figure; 100. a left automatic belt tensioning assembly; 200. a right automatic belt tensioning assembly; 300. a linkage mechanism; 301. mounting a base; 302. a first bearing; 303. rotating the disc; 304. a wave spring; 305. a friction plate support spacer; 306. a friction plate; 307. a first riveting plate; 401. a base; 402. a dust cover; 403. a central rotating shaft; 404. a first bolt; 405. a coil spring; 406. a belt pulley; 407. A second bearing; 408. a supporting ring; 409. a friction ring; 410. rotating the tensioning arm; 411. a sliding bushing; 412. a sliding gasket; 413. a second riveting plate; 414. and a second bolt.

Detailed Description

The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings. Directional phrases referred to in the following examples, for example; up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Therefore, the directional terminology used is for the purpose of describing, but not limiting, the invention, and moreover, like reference numerals designate like elements throughout the embodiments.

The following describes a specific embodiment of the present embodiment with reference to the drawings.

Fig. 1 is a schematic structural view of the present invention, and fig. 2 is an exploded view of the present invention. Referring to fig. 1 and 2, a bi-directional linkage type automatic belt tensioner includes a left automatic belt tensioner assembly 100 and a right automatic belt tensioner assembly 200. The left automatic belt-tightening assembly 100 and the right automatic belt-tightening assembly 200 are symmetrically installed on the link mechanism 300, and the left automatic belt-tightening assembly 100 and the right automatic belt-tightening assembly 200 can be linked.

Fig. 4 is a top view of the present invention, and fig. 5 is a cross-sectional view taken along line a-a of fig. 4. Referring to fig. 4 and 5, left automatic belt tensioner assembly 100 comprises base 401 with central pivot shaft 403, dust cap 402, coil spring 405, pulley 406, second bearing 407, support ring 408, friction ring 409, rotary tensioner arm 410, sliding bushing 411, sliding washer 412, second rivet plate 413. The base 401 is a cup with an opening.

The rotary tensioner arm 410 includes a first connection and a second connection. The first connecting portion is covered on the base 401 and fixedly connected by a second bolt 414, and the second connecting portion is connected by a first bolt 404 to a rotatable pulley 406 attached to an engine belt. A coil spring 405 is fitted over the central pivot shaft 403 with one side of the coil spring 405 abutting the base 401 and the other side of the coil spring 405 abutting the rotary tensioning arm 410. The second bearing 407 is pressed into the inner bore of the pulley 406 and the second bearing 407 bears the load. The dust cover 402 is fixed to one race of the second bearing 407 and extends toward the other race of the second bearing 407, covering the inner space of the second bearing 407.

The support ring 408 and the friction ring 409 are clamped with each other. Specifically, a plurality of axial grooves are respectively formed in the upper portion and the lower portion of the supporting ring 408, a plurality of radial protrusions are correspondingly formed in the friction ring 409, and the grooves and the protrusions are correspondingly clamped. The outer wall of the friction ring 409 is in sliding contact with the inner wall of the base 401. Friction ring 409 is made of an engineered nylon material.

The coil spring 405 is pre-expanded within the support ring 408. The first coupling portion is inserted through the slide bushing 411 and is in sliding contact with the inner wall of the central revolving shaft 403. The first connecting portion embeds the second riveting plate 413 and the sliding washer 412, and the second riveting plate 413 and the sliding washer 412 prevent the second bolt 414 from loosening.

The right automatic belt tensioner assembly 200 and the left automatic belt tensioner assembly 100 assembly are identical. Right automatic belt tensioner assembly 200 includes base 401 with central pivot shaft 403, dust cap 402, coil spring 405, pulley 406, second bearing 407, support ring 408, friction ring 409, rotary tensioner arm 410, sliding bushing 411, sliding washer 412, second rivet plate 413. The base 401 is a cup with an opening.

The rotary tensioner arm 410 includes a first connection and a second connection. The first connecting portion is covered on the base 401 and fixedly connected by a second bolt 414, and the second connecting portion is connected by a first bolt 404 to a rotatable pulley 406 attached to an engine belt. A coil spring 405 is fitted over the central pivot shaft 403 with one side of the coil spring 405 abutting the base 401 and the other side of the coil spring 405 abutting the rotary tensioning arm 410. The second bearing 407 is pressed into the inner bore of the pulley 406 and the second bearing 407 bears the load. The dust cover 402 is fixed to one race of the second bearing 407 and extends toward the other race of the second bearing 407, covering the inner space of the second bearing 407.

The support ring 408 and the friction ring 409 are clamped with each other. Specifically, a plurality of axial grooves are respectively formed in the upper portion and the lower portion of the supporting ring 408, a plurality of radial protrusions are correspondingly formed in the friction ring 409, and the grooves and the protrusions are correspondingly clamped. The outer wall of the friction ring 409 is in sliding contact with the inner wall of the base 401.

The coil spring 405 is pre-expanded within the support ring 408. The first coupling portion is inserted through the slide bushing 411 and is in sliding contact with the inner wall of the central revolving shaft 403. The first connecting portion embeds the second riveting plate 413 and the sliding washer 412, and the second riveting plate 413 and the sliding washer 412 prevent the second bolt 414 from loosening.

Preferably, the coil spring 405 is a tensioner torsion spring.

Fig. 3 is an exploded view of the linkage. As shown in fig. 3, the linkage 300 includes a mounting base 301, a rotating disc 303, and a first rivet plate 307. The mounting base 301, the rotating disc 303 and the first rivet plate 307 are coaxially mounted. The mounting base 301 includes a substrate. The center of the substrate is provided with a through hole. The sleeve is formed to extend in the axial direction of the through hole. And bent connecting pins are arranged along the circumferential direction of the substrate. The connecting pin is provided with a connecting hole. The turn disc 303 comprises a chassis. The supporting part for installing the left automatic belt tensioning assembly and the supporting part for installing the right automatic belt tensioning assembly are symmetrically arranged and protrude out of the chassis. The chassis is provided with a circle of annular grooves. A first bearing 302 for receiving a load is mounted between the mounting base 301 and the rotating disk 303. Preferably, the first bearing 302 is a self-lubricating bearing. A nylon friction plate 306, a friction plate support washer 305 and a wave spring 304 are installed between the rotating disc 303 and the first rivet plate 307. Nylon friction plates 306, friction plate support spacers 305, and wave springs 304 are embedded in the annular groove. The wave spring 304 is a thin-sheet annular elastic metal element comprising a plurality of peaks and valleys, and can bear the axial pre-pressure of the bidirectional linkage type automatic belt tensioning device.

The installation principle and the working principle of the invention are as follows:

in an automobile belt transmission gear train provided with an engine start-stop system, the automobile belt transmission gear train comprises a power generation start-up all-in-one machine, an accessory drive belt, a drive belt pulley arranged on the power generation start-up all-in-one machine and a driven gear train driven by the accessory drive belt. An accessory drive belt is wound around the drive pulley and the driven gear train. The power generation starting all-in-one machine is further provided with a bidirectional linkage type automatic belt tensioning device, the bidirectional linkage type automatic belt tensioning device is located between the driving belt pulley and the driven wheel train, and when the elastic sides of the belts on the left side and the right side of the power generation starting all-in-one machine are exchanged, compensation is conducted constantly through the left automatic belt tensioning assembly 100 and the right automatic belt tensioning assembly 200.

The left automatic belt tensioner assembly 100 and the right automatic belt tensioner assembly 200 are both fixed to a rotating disc 303 and the accessory drive belt is trained about the pulley 406 of the left automatic belt tensioner assembly 100 and the pulley 406 of the right automatic belt tensioner assembly 200 to produce a linkage effect.

When the left side of the bidirectional linkage type automatic belt tensioning device tensions a belt, the right side of the driving belt pulley of the power generation starting all-in-one machine is tensioned and shortened, the right automatic belt tensioning assembly 200 is pushed through the reaction force of the belt, an action force is additionally applied to the left automatic belt tensioning assembly 100 under the action of the rotating disc 303, the belt tensioning force is supplemented in time, and the belt is prevented from slipping in the operation process.

Similarly, when the right side of the bidirectional linkage type automatic belt tensioning device tensions a belt, the left belt of the driving belt pulley of the power generation starting all-in-one machine is tensioned and shortened, the left automatic belt tensioning assembly 100 is pushed through the reaction force of the belt, an action force is additionally applied to the right automatic belt tensioning assembly 200 under the action of the rotating disc 303, the tension force of the belt is supplemented in time, and the belt is prevented from slipping in the operation process.

The linkage 300 is provided with a nylon friction plate 306, a friction plate supporting gasket 305 and a wave spring 304, which are used for increasing the damping of the rotating disc 303, absorbing vibration and providing compensation for the axial abrasion of the linkage 300, so that the alignment degree of a driving belt pulley, a belt pulley of the left automatic belt tensioning assembly 100 and a belt pulley 406 of the right automatic belt tensioning assembly 200 in the automobile belt transmission gear train is ensured, the rotating disc 303 can be effectively ensured to rotate around the axis circumference under the action of the axial elastic force of the wave spring 304, and the running stability of the automobile belt transmission gear train is improved.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The foregoing description is illustrative of the present invention and is not to be construed as limiting thereof, the scope of the invention being defined by the appended claims, which may be modified in any manner without departing from the basic structure thereof.