CN217761918U

CN217761918U - Tensioning mechanism and transmission device

Info

Publication number: CN217761918U
Application number: CN202120820300.XU
Authority: CN
Inventors: 周洋洋; 张魏魏
Original assignee: Hefei Hagong Kuxun Intelligent Technology Co ltd
Current assignee: Hefei Hagong Kuxun Intelligent Technology Co ltd
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2022-11-08
Anticipated expiration: 2031-04-19

Abstract

The utility model discloses a straining device and transmission belongs to belt drive technical field. The tensioning mechanism of the utility model comprises a connecting rod component, a tensioning shaft and an adjusting component, and the tensioning mechanism compresses the transmission belt through shape constraint; the connecting rod assembly comprises at least two rotating rods which are respectively hinged on the bottom plate, and mounting holes are respectively formed in the at least two rotating rods; at least one tensioning shaft is arranged on each of two sides of the transmission belt and fixedly connected with the connecting rod assembly through mounting holes; the adjusting part is arranged on the rotating rod and used for adjusting the tension degree of the transmission belt. The utility model discloses an adjustable tensioning shaft of straining device is to the degree of driving belt tensioning to can fix after adjusting the tensioning degree, thereby realize that the driving belt remains stable tensioning state always. The utility model discloses a transmission can realize stable transmission efficiency to the tensioning degree of drive belt can be initiatively adjusted.

Description

Tensioning mechanism and transmission device

Technical Field

The utility model relates to a belt drive technical field, more specifically say, relate to a straining device and transmission.

Background

The tensioning mechanism is generally formed by a tensioning wheel or a tensioning shaft, and can change the wrap angle of the transmission wheel or control the tensioning force of the transmission belt by applying pressure to the transmission belt. The transmission belt and the transmission wheel keep certain friction force during working, but the transmission belt is stretched and loosened after working for a period of time, so that the friction force between the transmission belt and the transmission wheel is reduced, and the transmission belt is easy to slip and needs to be tensioned again. Especially when the center distance between the two driving wheels can not be adjusted, a tensioning mechanism is needed to ensure normal driving without slipping. The tensioning mechanism typically applies pressure to the drive belt using a spring or oil pressure, etc., to tighten the belt so that the drive belt can be pressed against the drive pulley with a suitable pressure.

Upon search, a tensioner arrangement for a belt drive and a belt drive having the tensioner arrangement are disclosed in the prior art (application No.: 201710478616.3, application date: 2017, 6-month-22-day), the tensioner arrangement for a belt drive and the belt drive having the tensioner arrangement disclosed in the application provide a tensioner arrangement for a belt drive in an engine. In one example, the tensioner arrangement includes a first tensioner wheel and a second tensioner wheel that tension a belt with a spring force and a spring preload force generated by a first spring device coupled to the first and second tensioner wheels. The tensioner arrangement further includes a reinforcement device that reduces belt tension during low belt load conditions and increases belt tension during high belt load conditions.

This application may reduce frictional losses during low belt loads and may also reduce belt slip caused by high belt loads and/or dynamic changes in belt loads. However, when the tensioning mechanism uses the spring to compress the transmission belt, the tensioning force of the transmission belt cannot be continuously adjusted, the tensioning degree of the transmission belt under different driving forces cannot be adapted, and the application range of the tensioning mechanism is greatly reduced.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

The utility model aims to overcome the problem that straining device among the prior art can not adjust the tensile force of drive belt continuously, provide a straining device, carry out continuous regulation through adjusting part to link assembly's rotation to change the rate of tension of drive belt under different drive power.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

a tensioning mechanism is used for tensioning a transmission belt in a transmission mechanism, the transmission mechanism comprises a driving wheel, the transmission belt and at least one driven wheel, the transmission mechanism and the tensioning mechanism are mounted on a bottom plate, the tensioning mechanism comprises a connecting rod assembly, a tensioning shaft and an adjusting component, and the tensioning mechanism compresses the transmission belt through shape constraint;

the connecting rod assembly comprises at least two rotating rods which are respectively hinged on the bottom plate, and mounting holes are respectively formed in the at least two rotating rods;

the tensioning shafts are respectively arranged on two sides of the transmission belt and are fixedly connected with the connecting rod assembly through mounting holes;

the adjusting part is arranged on the rotating rod and used for adjusting the tension degree of the transmission belt.

As a further improvement of the present invention, the rotating rod is composed of a first rotating rod and a second rotating rod, and the tensioning shaft includes a first tensioning shaft and a second tensioning shaft; the first tensioning shaft is fixedly arranged on the first rotating rod, and the second tensioning shaft is fixedly arranged on the second rotating rod; the first tensioning shaft and the second tensioning shaft are respectively positioned on two sides of the transmission belt.

As a further improvement of the utility model, one end of the first rotating rod is hinged, and the other end of the first rotating rod forms a first adjusting position; one end of the second rotating rod is hinged, the other end of the second rotating rod is fixed with the connecting rod, the connecting rod extends towards the first adjusting position on the first rotating rod, and the extending tail end of the connecting rod forms a second adjusting position; the adjusting component is arranged between the first adjusting position and the second adjusting position.

As a further improvement of the utility model, one end of the first rotating rod is hinged, and the other end of the first rotating rod forms a first adjusting position; one end of the second rotating rod is hinged, the other end of the second rotating rod is bent and extended to the first adjusting position on the first rotating rod, and the extending tail end of the second rotating rod forms a second adjusting position; the adjusting component is arranged between the first adjusting position and the second adjusting position.

As a further improvement, the first adjusting position is formed by bending the free end of the first rotating rod to the direction of the second rotating rod.

As a further improvement, the adjusting part is adjusting bolt, the second adjust the position on set up the screwed regulation hole, adjusting bolt one end is passed and is leaned on first regulation position after the regulation hole.

As a further improvement, the adjusting part constitute by adjusting stud and adjusting nut, adjusting nut installs at adjusting stud both ends, the second adjust the position on set up the through-hole, support after adjusting stud one end passes the through-hole and lean on first regulation position, adjusting nut be used for controlling the length of the one end of passing the through-hole on the adjusting stud.

As a further improvement, the first adjusting position is provided with a positioning groove for accommodating one end of the adjusting bolt supported on the first adjusting position.

As a further improvement of the present invention, the first tensioning shaft and/or the second tensioning shaft are/is provided with a tensioning wheel.

A transmission device comprises a tensioning mechanism and a transmission mechanism, wherein the transmission mechanism comprises a driving wheel and a driven wheel, and the driving wheel is connected with a motor.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

(1) The utility model discloses a tensioning mechanism, which is used for tensioning a transmission belt in a transmission mechanism, and comprises a connecting rod component, a tensioning shaft and an adjusting component, wherein the tensioning mechanism compresses the transmission belt through shape constraint; the connecting rod assembly comprises at least two rotating rods which are respectively hinged on the bottom plate, and mounting holes are respectively formed in the at least two rotating rods; at least one tensioning shaft is arranged on each of two sides of the transmission belt and is fixedly connected with the connecting rod assembly through a mounting hole; the adjusting part is arranged on the rotating rod and used for adjusting the tension degree of the transmission belt. The utility model discloses a straining device carries out the tensioning to the driving belt through the relative position between the fixed tensioning axle, and adjusting part realizes continuous adjustment tensioning axle to the degree of driving belt tensioning to can fix after adjusting the tensioning degree, thereby realize that the drive belt keeps the state of stabilizing the tensioning always.

(2) The utility model discloses a transmission device, including straining device and drive mechanism, drive mechanism includes an action wheel and a follow driving wheel, and the motor is connected to the action wheel. The utility model discloses a transmission can realize stable transmission efficiency to the tensioning degree of drive belt can be initiatively adjusted.

Drawings

FIG. 1 is a schematic top view of a tensioning mechanism;

FIG. 2 is a schematic side view of the tensioning mechanism;

FIG. 3 is a schematic top view of the connecting rod assembly;

FIG. 4 is a side view of the connecting rod assembly;

FIG. 5 is a schematic view of a first rotating rod;

FIG. 6 is a schematic view of a connecting rod structure;

fig. 7 is a schematic view of the second rotating rod.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

The structure, proportion, size and the like shown in the drawings of the present specification are only used for matching with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used for limiting the limit conditions of the present invention, so that the present invention has no technical essence, and any structural modification, proportion relation change or size adjustment should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms such as "upper", "lower", "left", "right" and "middle" used in the present specification are used for clarity of description, and are not used to limit the implementable scope, and the changes or adjustments of the relative relationship thereof can be considered as the implementable scope of the present invention without substantial technical changes.

Example 1

As shown in fig. 1 and 2, a tensioning mechanism of the present embodiment is used for tensioning a transmission belt in a transmission mechanism, the transmission mechanism 200 includes a driving wheel 210, a transmission belt 230 and at least one driven wheel 220, the transmission belt 230 is disposed on the driving wheel 210 and the driven wheel 220 so as to form a closed loop, and the transmission belt 230 may be in the form of a belt or a chain. The drive belt 230 forms segments between the driven pulley 220 and the driving pulley 210 and between the driven pulley 220 and the driven pulley 220, and the tensioning mechanism is then a part of the drive belt 230 that is not in direct contact with the driven pulley 220 or the driving pulley 210, while tensioning at least two segments of the drive belt 230. The tensioning mechanism increases the contact area between the transmission belt 230 and the driving wheel 210 or between the transmission belt 230 and the driven wheel 220 by extruding the transmission belt 230, so as to improve the friction force between the transmission belt and the transmission wheel, thereby increasing the transmission efficiency, and also avoiding the problem that the transmission belt 230 is easy to slip due to the transmission belt 230 becoming loose after the transmission mechanism 200 works for a period of time.

The transmission mechanism 200 and the tensioning mechanism are installed on the bottom plate 100, the bottom plate 100 can be made of various metal materials convenient for installation, and fixing holes for installing the mechanisms are formed in the bottom plate 100.

The tensioning mechanism comprises a connecting rod assembly 300, a tensioning shaft and an adjusting part, the connecting rod assembly 300 comprises at least two rotating rods which are respectively hinged on the bottom plate 100, the rotating rods are provided with hinge holes, and the rotating rods are hinged on the bottom plate 100 through fixing holes correspondingly formed in the bottom plate 100. Because this embodiment will realize the tension of two segmentations simultaneously at least, consequently have to be provided with the mounting hole on two dwang respectively at least, the quantity of mounting hole will satisfy the needs of tensioning axle installation, and then the tensioning axle respectively sets up at least one in the both sides of drive belt 230, and the both sides of this drive belt 230 mean install two adjacent segmentations of drive belt on same action wheel or follow driving wheel.

The tensioning shaft is fixedly connected with the connecting rod assembly through the mounting hole. When the length of the transmission belt 230 is long, a plurality of tensioning shafts can be arranged on a single rotating rod to improve the tensioning effect.

An adjustment member is mounted on the turning rod for adjusting the tension of the transmission belt 230. The adjusting component mainly realizes the tightness of the adjusting belt 230 by changing the distance between each connecting rod in the connecting rod assembly. Specifically, the closer the two rotating levers are to each other as the connecting lever rotates about the hinge point, the more pronounced the resulting shape constraint is to press the belt 230. The tensioning mechanism compresses the drive belt by shape constraint, i.e. after adjusting the tension, the relative position between the swivelling levers is unchanged, so the relative position between the tensioning shafts on the link assembly is also unchanged, thereby using shape constraint to cause both sides of the drive belt 230 to be compressed simultaneously. Compared with the mode of pulling the connecting rod assembly by using a spring and other components, the tensioning mechanism can keep constant tensioning effect, and when the tensioning degree of the transmission belt 230 is not proper, the tensioning effect of the tensioning mechanism is adjusted by the adjusting component.

Example 2

In the embodiment shown in fig. 3 to 7, there are two hinged rotation levers, i.e. the rotation levers are composed of a first rotation lever 310 and a second rotation lever 330, the tensioning shafts include a first tensioning shaft 340 and a second tensioning shaft 350, the first tensioning shaft 340 is fixedly mounted on the first rotation lever 310, and the second tensioning shaft 350 is fixedly mounted on the second rotation lever 330. The first tensioning shaft 340 and the second tensioning shaft 350 are respectively located at both sides of the driving belt 230 for simultaneously tensioning both sides of the driving belt 230. When the belt 230 is tensioned by the tensioning mechanism, the first rotating rod 310 and the second rotating rod 330 rotate in opposite directions, so as to drive the first tensioning shaft 340 and the second tensioning shaft 350 to simultaneously press the belt 230. The first tensioning shaft 340 and the second tensioning shaft 350 may be provided in plural numbers, respectively, so as to maintain a good tensioning effect when the length of the transmission belt 230 is long.

One end of the first rotating lever 310 is hinged to the base plate 100, and the other end of the first rotating lever 310, i.e., the free end of the first rotating lever 310 is formed as a first regulation position 313. One end of the second rotating rod 330 is hinged to the bottom plate 100, the other end of the second rotating rod 330, i.e. the free end of the second rotating rod 330, is fixed to the connecting rod 320, the connecting rod 320 extends towards the first adjusting position 313 on the first rotating rod 310, and the extending end of the connecting rod 320 forms a second adjusting position 322. The second adjusting position 322 is a section of the extending end of the connecting rod 320, the extending direction of the connecting rod 320 is perpendicular to the direction of the body of the connecting rod 320, and the second adjusting position 322 formed after extending and the first adjusting position 313 can be provided with an adjusting part together.

It is worth noting that the one end of the rotating rod is hinged to meet the requirement that the rotating rod drives the tensioning shaft to move, and therefore, if the hinged point is arranged in the middle of the rotating rod instead of at the end, the tensioning function of the tensioning shaft is also within the protection range of the scheme as long as the tensioning function can be achieved. The adjusting member is disposed between the first adjusting position 313 and the second adjusting position 322, and can drive the first tensioning shaft 340 and the second tensioning shaft 350 on both sides of the transmission belt 230 to approach each other by changing the rotation angles of the first rotating lever 310 and the second rotating lever 330, thereby adjusting the tension of the transmission belt 230.

Another embodiment of this embodiment does not provide the connecting rod 320, but replaces the connecting rod 320 by bending the second rotating rod 330. Specifically, one end of the first rotating rod 310 is hinged, and the other end forms a first adjusting position 313; one end of the second rotating rod 330 is hinged, the other end is bent and extended towards the first adjusting position 313 on the first rotating rod 310, and the extended tail end of the second rotating rod 330 forms a second adjusting position 322. The adjusting member of this embodiment still moves the first tensioning shaft 340 and the second tensioning shaft 350 on both sides of the transmission belt 230 to approach each other by changing the rotation angles of the first rotating rod 310 and the second rotating rod 330, and the adjusting member is disposed between the first adjusting position 313 and the second adjusting position 322.

As shown in fig. 5, the first adjustment position 313 is formed by bending the free end of the first rotating lever 310 in the direction of the second rotating lever 330, the direction of the second rotating lever 330 refers to the direction in which the first rotating lever 310 approaches the second rotating lever 330, and when the second rotating lever 330 is bent without providing the connecting rod 320, the direction of the second rotating lever 330 is approached without including the bent portion of the second rotating lever 330. In this embodiment, the free end of the first rotating rod 310 can also be used as the first adjusting position 313 by using an external connecting rod member, which is offset from the first rotating rod 310 in the direction approaching the second rotating rod 330.

The adjusting component of this embodiment may be an adjusting bolt, the second adjusting position 322 is provided with an adjusting hole 400 with threads, and one end of the adjusting bolt passes through the adjusting hole 400 and abuts against the first adjusting position 313. When the tensioning mechanism is used, the adjusting bolt is rotated so as to change the length of one end of the adjusting bolt after penetrating through the adjusting hole, and the adjusting bolt abuts against the first adjusting position 313, so that the relative distance between the first adjusting position 313 and the second adjusting position 322 is changed, the relative distance between the first tensioning shaft 340 and the second tensioning shaft 350 is further changed, and the tensioning effect of the adjusting tensioning mechanism is realized.

The adjusting part of this embodiment may also be composed of an adjusting stud and an adjusting nut, the adjusting nut is installed at both ends of the adjusting stud, a through hole is provided on the second adjusting position 322, no thread is provided in the through hole, one end of the adjusting stud abuts against the first adjusting position 313 after passing through the through hole, both ends of the adjusting nut locking through hole at both ends of the adjusting stud are provided, two adjusting nuts can be rotated together by the accessible, thereby controlling the length of one end of the adjusting stud passing through the through hole, therefore, the relative distance between the first adjusting position 313 and the second adjusting position 322 is changed, further, the relative distance between the first tensioning shaft 340 and the second tensioning shaft 350 is changed, and the tensioning effect of the adjusting tensioning mechanism is realized.

When the adjusting component is used, the adjusting bolt abuts against the first adjusting position 313 and moves along the length direction of the first adjusting position 313, and the first adjusting position 313 of the embodiment is provided with a positioning groove which is a long strip-shaped groove along the length direction of the first adjusting position 313 and can accommodate one end of the adjusting bolt abutting against the first adjusting position 313, so that the positioning of one end of the adjusting bolt abutting against the first adjusting position 313 can be realized. When the adjusting stud and the adjusting nut are used as the adjusting bolt, the positioning groove can be arranged in the same way.

When the tension shaft is sufficiently lubricated with the transmission belt 230, only the tension pulley may be provided, and at this time, a shaft diameter of a portion of the tension shaft contacting the transmission belt 230, that is, an upper end of the tension shaft, may be set larger than other portions of the tension shaft, for increasing a contactable area of the tension shaft and the transmission belt 230. Preferably, the tensioning shaft is provided with a tensioning wheel, i.e. the first tensioning shaft and/or the second tensioning shaft is provided with a tensioning wheel. The tension wheel rotates along with the movement of the transmission belt 230 when tensioning the transmission belt, rolling friction is used to replace sliding friction, and friction between the tension mechanism and the transmission belt 230 is reduced, so that transmission efficiency of the transmission belt is improved.

Example 3

The present embodiment provides a transmission device, which includes the tensioning mechanism and the transmission mechanism 200 in the foregoing embodiments, the transmission mechanism 200 includes a driving wheel 210 and a driven wheel 220, the driving wheel 210 is connected with a motor, the transmission device is mounted on the base plate 100, and can be used to realize the separation of the motor and the driven component in position, and the tensioning degree of the transmission belt is more accurate due to the tensioning mechanism capable of continuously adjusting the tensioning degree, in addition, the transmission mechanism 200 can maintain a higher transmission efficiency, and maintain the driven component to move stably.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art should understand that without departing from the spirit of the present invention, the person skilled in the art should not inventively design the similar structural modes and embodiments to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. The utility model provides a straining device for the drive belt among the tensioning drive mechanism, drive mechanism include a action wheel, drive belt and at least one follow driving wheel, and drive mechanism and straining device install on the bottom plate its characterized in that: the tensioning mechanism comprises a connecting rod assembly, a tensioning shaft and an adjusting component, and compresses the transmission belt through shape constraint;

2. A tensioning mechanism according to claim 1, wherein: the rotating rod consists of a first rotating rod and a second rotating rod, and the tensioning shaft comprises a first tensioning shaft and a second tensioning shaft; the first tensioning shaft is fixedly arranged on the first rotating rod, and the second tensioning shaft is fixedly arranged on the second rotating rod; the first tensioning shaft and the second tensioning shaft are respectively positioned on two sides of the transmission belt.

3. A tensioning mechanism according to claim 2, wherein: one end of the first rotating rod is hinged, and the other end of the first rotating rod forms a first adjusting position; one end of the second rotating rod is hinged, the other end of the second rotating rod is fixed with the connecting rod, the connecting rod extends towards the first adjusting position on the first rotating rod, and the extending tail end of the connecting rod forms a second adjusting position; the adjusting component is arranged between the first adjusting position and the second adjusting position.

4. A tensioning mechanism according to claim 2, wherein: one end of the first rotating rod is hinged, and the other end of the first rotating rod forms a first adjusting position; one end of the second rotating rod is hinged, the other end of the second rotating rod is bent and extended to the first adjusting position on the first rotating rod, and the extending tail end of the second rotating rod forms a second adjusting position; the adjusting component is arranged between the first adjusting position and the second adjusting position.

5. A tensioning mechanism according to claim 3 or 4, wherein: the first adjusting position is formed by bending the free end of the first rotating rod towards the direction of the second rotating rod.

6. A tensioning mechanism according to claim 5, wherein: the adjusting part is an adjusting bolt, the second adjusting position is provided with an adjusting hole with threads, and one end of the adjusting bolt is abutted against the first adjusting position after penetrating through the adjusting hole.

7. A tensioning mechanism according to claim 5, wherein: the adjusting part is composed of an adjusting stud and an adjusting nut, the adjusting nut is installed at two ends of the adjusting stud, a through hole is formed in the second adjusting position, one end of the adjusting stud abuts against the first adjusting position after penetrating through the through hole, and the adjusting nut is used for controlling the length of one end, penetrating through the through hole, of the adjusting stud.

8. A tensioning mechanism according to claim 6, wherein: the first adjusting position is provided with a positioning groove, and the positioning groove is used for accommodating one end of an adjusting bolt abutted against the first adjusting position.

9. A tensioning mechanism according to any one of claims 2 to 4, characterized in that: and a tensioning wheel is arranged on the first tensioning shaft and/or the second tensioning shaft.

10. A transmission comprising a tensioning mechanism and a transmission mechanism according to any one of claims 1 to 4, wherein: the transmission mechanism comprises a driving wheel and a driven wheel, and the driving wheel is connected with the motor.