CN214171247U

CN214171247U - Belt take-up unit and belt transmission mechanism

Info

Publication number: CN214171247U
Application number: CN202023233782.3U
Authority: CN
Inventors: 王敬杰; 周承立
Original assignee: Shenzhen Anycubic Technology Co Ltd
Current assignee: Shenzhen Anycubic Technology Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-09-10
Anticipated expiration: 2030-12-28
Also published as: WO2022142958A1

Abstract

The application discloses belt take-up and belt drive mechanism, wherein, belt take-up includes: the device comprises a shell, a U-shaped groove accommodated in the shell, a first roller arranged in the U-shaped groove and a driving mechanism positioned between the first roller and the bottom of the U-shaped groove; the inner side of the shell is provided with a limiting groove, and the side wall of the U-shaped groove is clamped in the limiting groove; the U-shaped groove comprises a first side wall and a second side wall, a first through hole is formed in the first side wall, a second through hole is formed in the second side wall, and two ends of the first roller wheel respectively penetrate through the first through hole and the second through hole; the driving mechanism is connected with the shell; wherein, actuating mechanism can drive the U-shaped groove along the length direction round trip movement of spacing groove to drive first gyro wheel along the length direction round trip movement of spacing groove. The elasticity of regulation belt that this application embodiment can be simple and convenient.

Description

Belt take-up unit and belt transmission mechanism

Technical Field

The application belongs to the technical field of transmission mechanisms, and particularly relates to a belt loosening and tightening device and a belt transmission mechanism.

Background

At present, synchronous conveyor belts are widely used in transmission parts, but along with the increase of service time, the change of environmental temperature and the like, the tightness of the conveyor belt is changed, and the transmission effect is influenced.

In the related art, when the tightness of the belt is not matched with the synchronizing wheel (for example, the belt is too loose, which causes the contact area between the synchronizing wheel and the belt to be reduced, thereby reducing the transmission force of the transmission part), the transmission force of the transmission part is often increased by reassembling the belt with a matched length, but the reassembling of the belt with a matched length requires disassembling the transmission part, reconfiguring the belt, and the like, which causes a complex assembling process.

SUMMERY OF THE UTILITY MODEL

The purpose of the embodiment of the application is to provide a belt take-up unit and a belt transmission mechanism, which can simply and conveniently adjust the tightness of a belt through an adjusting mechanism.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, an embodiment of the present application provides a belt tightening device, including: the device comprises a shell, a U-shaped groove accommodated in the shell, a first roller arranged in the U-shaped groove and a driving mechanism positioned between the first roller and the bottom of the U-shaped groove;

a limiting groove is formed in the inner side of the shell, and the side wall of the U-shaped groove is clamped in the limiting groove;

the U-shaped groove comprises a first side wall and a second side wall, a first through hole is formed in the first side wall, a second through hole is formed in the second side wall, and two ends of the first roller wheel respectively penetrate through the first through hole and the second through hole;

the driving mechanism is connected with the shell;

the driving mechanism can drive the U-shaped groove to move back and forth along the length direction of the limiting groove so as to drive the first roller to move back and forth along the length direction of the limiting groove.

Optionally, the drive mechanism comprises:

the first sliding block comprises a first inclined plane, and the first inclined plane satisfies 0 degrees < A <90 degrees, wherein A is the inclined angle of the first inclined plane relative to the bottom of the U-shaped groove;

the second sliding block comprises a second inclined plane attached to the first inclined plane, and one side of the second sliding block, which is back to the second inclined plane, is abutted against the bottom of the U-shaped groove;

an adjusting member connecting the first slider and the housing;

the shell is also provided with a limiting part, and two opposite ends of the second sliding block along the first direction are respectively abutted against the limiting part, so that the second sliding block can only move along the length direction of the limiting groove;

under the adjusting action of the adjusting piece, the first sliding block moves back and forth along the first direction, so that the first inclined surface of the first sliding block and the second inclined surface of the second sliding block slide relatively to drive the U-shaped groove and the first roller to move back and forth along the length direction of the limiting groove under the transmission action of the second sliding block, and the first direction is perpendicular to the axial direction of the first roller.

Optionally, the adjusting member comprises a bolt and a nut:

the bolt includes: the bolt comprises a bolt and a nut connected to the first end of the bolt, wherein the bolt is provided with an external thread; the nut is provided with an internal thread matched with the external thread;

a third through hole is formed in the shell, and the diameter of the third through hole is smaller than the outer diameter of the screw cap and larger than or equal to the outer diameter of the stud;

a fourth through hole and a groove communicated with the fourth through hole are formed in the first sliding block;

the second end of the stud sequentially penetrates through the third through hole and the fourth through hole and is in threaded connection with the nut, the nut is clamped in the groove, and the nut is erected on one side, far away from the first sliding block, of the third through hole.

Optionally, the first inclined surface faces away from the nut, and the second inclined surface faces towards the nut.

Optionally, the belt tensioner further comprises: the inner side of the shell is also provided with a clamping groove;

the end portion of the baffle is clamped in the clamping groove, so that the baffle abuts against the first sliding block, and the first sliding block is located between the baffle and the second sliding block.

Optionally, the first roller includes: the synchronous wheel, a shaft pin penetrating through the synchronous wheel along the axial direction, a first ball bearing, a second ball bearing, a first gasket and a second gasket;

the synchronous wheel clamp is arranged between the first ball bearing and the second ball bearing, and the first end of the shaft pin penetrates through the first ball bearing and is fixed in the first through hole through the first gasket;

the second end of the shaft pin penetrates through the second ball bearing and is fixed in the second through hole through the second gasket.

Optionally, the first end of the shaft pin penetrates through the first gasket, so that the first gasket is in interference fit with the inner side wall of the first through hole and the outer wall of the first end of the shaft pin respectively;

the second end of the shaft pin penetrates through the second gasket, so that the second gasket is in interference fit with the inner side wall of the second through hole and the outer wall of the second end of the shaft pin respectively.

Optionally, the casing is further provided with a bar-shaped through hole, a length direction of the bar-shaped through hole is parallel to a length direction of the limiting groove, and an end portion of the shaft pin penetrates through the bar-shaped through hole and is exposed out of the casing.

Optionally, the limiting groove includes a first limiting groove and a second limiting groove which are arranged opposite to each other, the housing includes a front cover and a rear cover, the first limiting groove is arranged on one side of the front cover facing the rear cover, and the second limiting groove is arranged on one side of the rear cover facing the front cover;

and two side walls of the U-shaped groove are respectively clamped in the first limiting groove and the second limiting groove.

In a second aspect, an embodiment of the present application provides a belt transmission mechanism, including any one of the belt tensioners described above.

In an embodiment of the present application, a belt tensioner includes: the device comprises a shell, a U-shaped groove accommodated in the shell, a first roller arranged in the U-shaped groove and a driving mechanism positioned between the first roller and the bottom of the U-shaped groove; the inner side of the shell is provided with a limiting groove, and the side wall of the U-shaped groove is clamped in the limiting groove; the U-shaped groove comprises a first side wall and a second side wall, a first through hole is formed in the first side wall, a second through hole is formed in the second side wall, and two ends of the first roller wheel respectively penetrate through the first through hole and the second through hole; the driving mechanism is connected with the shell; wherein, actuating mechanism can drive the U-shaped groove along the length direction round trip movement of spacing groove to drive first gyro wheel along the length direction round trip movement of spacing groove. Therefore, when the driving mechanism drives the U-shaped groove to move towards the direction of the groove bottom, the first roller is driven to move along the same direction, so that the first roller moves towards the tensioning direction of the belt, and the effect of improving the tensioning degree of the transmission belt is achieved; when the driving mechanism drives the U-shaped groove to move back to the direction of the groove bottom, the first roller is driven to move along the same direction, so that the first roller moves towards the loosening direction of the belt, and the effect of reducing the tension degree of the transmission belt is achieved.

Drawings

Fig. 1 is a disassembled structural view of a belt tightening device provided in an embodiment of the present application;

FIG. 2 is a front view of a belt tensioner provided by an embodiment of the present application;

FIG. 3 is an isometric view of a belt tensioner provided by an embodiment of the present application;

FIG. 4 is a cross-sectional view taken along the line A-A in FIG. 3;

FIG. 5 is a perspective view of a belt tensioner provided by embodiments of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The belt take-up unit 100 provided by the embodiment of the application can be connected with a belt in a belt conveying mechanism, so that the belt is tensioned or loosened when the belt take-up unit 100 drives the first roller 3 to move. Wherein, the above-mentioned belt transport mechanism can be the transport mechanism in the 3D printing mechanism, for example: the conveying mechanism is used for driving the printing shaft to move, the printing shaft is fixedly connected with the belt, and when the belt is tensioned, the printing shaft is clamped in the annular belt and moves transversely, longitudinally or back and forth along with the rotation of the belt.

Of course, in specific implementations, the belt conveying mechanism may also be other types of conveying mechanisms, such as: the belt conveying mechanism for carrying and conveying the products to be processed on the production line is not particularly limited.

The belt tensioner and the belt transmission mechanism provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings by specific embodiments and application scenarios thereof.

Referring to fig. 1, 2 and 4, a belt tensioner 100 according to an embodiment of the present invention includes: the device comprises a shell 1, a U-shaped groove 2 contained in the shell 1, a first roller 3 arranged in the U-shaped groove 2 and a driving mechanism 4 positioned between the first roller 3 and the bottom of the U-shaped groove 2.

In the implementation, the first roller 3 is used for allowing the belt to be wound around or fixed, and when the first roller 3 is driven by the U-shaped groove 2 to move left and right, the tightness of the belt can be adjusted, for example: if the belt extends to the left side of the first roller 3, at this time, when the U-shaped groove 2 drives the first roller 3 to move to the right side, the tension of the belt is increased; when the U-shaped groove 2 drives the first roller 3 to move towards the left side, the tension degree of the belt is reduced.

As shown in fig. 1, a limiting groove 11 is disposed on the inner side of the housing 1, the side wall of the U-shaped groove 2 is clamped in the limiting groove 11, the U-shaped groove 2 includes a first side wall and a second side wall, the first side wall is provided with a first through hole 21, the second side wall is provided with a second through hole 22, two ends of the first roller 3 respectively penetrate through the first through hole 21 and the second through hole 22, and the driving mechanism 4 is connected with the housing 1.

In operation, the housing 1 can be stationary relative to the belt drive, for example: and the like, so that when the driving mechanism 4 drives the U-shaped groove 2 to move back and forth along the length direction of the limiting groove 11 to drive the first roller 3 to move back and forth along the length direction of the limiting groove 11 (as shown in the direction B in fig. 2), the distance between the central positions of the first roller 3 relative to the belt driving mechanism is changed, thereby changing the stretching length of the belt and achieving the effect of adjusting the tightness of the belt.

Preferably, the length direction of the limiting groove 11 is the same as the belt tensioning direction, that is, the length direction of the limiting groove 11 is the same as the extending direction of the belt, and the belt tensioner 100 is disposed at the end of the belt, so that when the first roller 3 is driven by the U-shaped groove 2 to move along the length direction of the limiting groove 11, the first roller 3 will move towards the loosening direction or the tensioning direction of the belt, so as to tension or loosen the belt, wherein the loosening direction of the belt is the same as the direction in which the belt extends from the first roller 3, and when the first roller 3 moves along the direction, the stretching length of the belt is reduced, so as to achieve the effect of loosening the belt; in addition, the above-mentioned belt tensioning direction means a direction opposite to a direction in which the belt extends from the first roller 3, and when the first roller 3 moves in this direction, the stretched length of the belt increases, thereby achieving an effect of tensioning the belt.

In addition, the side wall of the U-shaped groove 2 is clamped in the limit groove 11, and it can be understood that: be provided with two spacing grooves 11 in the casing 1, two lateral walls of this U-shaped groove 2 block respectively locates two spacing inslots 11, perhaps, only are provided with 1 spacing groove 11 in the casing 1, and this spacing inslot 11 is located to a lateral wall card of this U-shaped groove 2, and spacing groove 11 is provided with the anti-disengaging structure who prevents that U-shaped groove 2 from breaking away from this spacing inslot 11.

For example: the limiting groove 11 comprises a first limiting groove and a second limiting groove which are arranged oppositely, the shell 1 comprises a cover 13 and a rear cover 14, the first limiting groove is arranged on one side of the front cover 13 facing the rear cover 14, and the second limiting groove is arranged on one side of the rear cover 14 facing the front cover 13;

two side walls of the U-shaped groove 2 are respectively clamped in the first limiting groove and the second limiting groove.

As shown in fig. 2, the housing 1 is provided with an opening 12, and in the embodiment, the belt is wound around the first roller 3 through the opening 12, so that the belt is conveyed when the first roller 3 rolls.

Alternatively, the housing 1 includes a front cover 13 and a rear cover 14 that are detachable, and the stopper groove 11 is provided in at least one of the front cover 13 and the rear cover 14.

Thus, the belt tensioner 100 can be assembled when the front cover 13 and the rear cover 14 are separated, so that the front cover 13 and the rear cover 14 are fastened after the belt tensioner 100 is drivingly connected to a belt. Therefore, the belt tightening device 100 can be simply and conveniently installed in the existing belt conveying mechanism to realize the tightening adjustment of the belt in the existing belt conveying mechanism.

Preferably, as shown in fig. 3, the driving mechanism 4 is disposed between the bottom of the U-shaped groove 2 and the first roller 3, and the driving mechanism 4 includes an adjusting member 43 (e.g., a rotating wheel or a nut of a bolt capable of being rotated) for being adjusted by a user, and the adjusting member 43 is exposed from the housing 1.

Specifically, the case 1 may be provided with the fifth through hole 15, or the case 1 may be made to surround only a portion of the belt tensioner 100, so that the adjuster 43 of the drive mechanism 4 is at least partially exposed from the case 1.

In this way, the user can easily adjust the exposed adjusting member 43, thereby driving the driving mechanism 4.

Further, as shown in fig. 1, 2 and 3 (the front cover 13 is not shown in fig. 2 and 3), the driving mechanism 4 includes:

a first slider 41, wherein the first slider 41 comprises a first inclined surface 411, and the inclination angle of the first inclined surface 411 relative to the bottom of the U-shaped groove 2 is 0 ° < a <90 °;

the second sliding block 42 comprises a second inclined surface 421 attached to the first inclined surface 411, and one side of the second sliding block 42, which is opposite to the second inclined surface 421, is abutted against the bottom of the U-shaped groove 2;

an adjusting piece 43, wherein the adjusting piece 43 is connected with the first sliding block 41 and the shell 1;

the housing 1 is further provided with a limiting portion 16, and opposite ends of the second slider 42 along the first direction (direction C shown in fig. 2) are respectively abutted against the limiting portion 16, so that the second slider 42 can only move along the length direction of the limiting groove 11.

In implementation, under the adjusting action of the adjusting member 43, the first slider 41 moves back and forth along the first direction C, so that the first inclined surface 411 of the first slider 41 slides relative to the second inclined surface 421 of the second slider 42, so as to drive the U-shaped groove 2 and the first roller 3 to move back and forth along the length direction B of the limiting groove 11 under the driving action of the second slider 42, and the first direction C is perpendicular to the axial direction of the first roller 3.

In a specific implementation, the adjusting part 43 can receive an adjusting operation of a user, and under an acting force of the adjusting operation, the first slider 41 is driven to move back and forth along a first direction C, as shown in fig. 2, where the first direction C is perpendicular to the length direction B of the limiting groove.

In an embodiment, the number of the first inclined surfaces 411 of the first slider 41 may be 1 or 2, and correspondingly, the number of the second inclined surfaces 421 of the second slider 42 is equal to the number of the first inclined surfaces 411 of the first slider 41, and the first inclined surfaces are respectively attached to each other. However, when the number of the first inclined surfaces 411 and the number of the second inclined surfaces 421 are 2 or more, the side of the first slider 41 where the first inclined surface 411 is provided and the side of the second slider 42 where the second inclined surface 421 is provided are engaged with each other, so that the first slider 41 and the second slider 42 can be prevented from being completely separated during movement.

The adjusting member 43 connects the first slider 41 and the housing 1, and it can be understood that the adjusting member 43 is stationary relative to the housing 1 and can drive the first slider 41 to move relative to the housing 1.

As shown in fig. 4, in the case that the adjusting member 43 drives the first slider 41 to move upward, the second slider 42 cannot move up and down due to the limiting function of the limiting portion 16, so that the second inclined surface 421 of the second slider 42 is forced to slide downward relative to the first inclined surface 411, that is, the second slider 42 moves away from the first slider 41 in the length direction of the limiting groove 11.

In addition, in the case that the adjusting member 43 drives the first slider 41 to move downward, the second slider 42 cannot move upward or downward due to the limiting function of the limiting portion 16, so that the second inclined surface 421 of the second slider 42 is forced to slide upward relative to the first inclined surface 411, that is, the second slider 42 moves in a direction approaching the first slider 41, that is, the second slider 42 approaches the first slider 41 in the length direction of the limiting groove 11.

In this embodiment, the adjusting part 43 drives the two sliding blocks with the inclined surfaces to send relative sliding, so as to adjust the relative distance between the two sliding blocks, thereby achieving the effect of driving the U-shaped groove 2 to move back and forth along the length direction of the limiting groove 11.

Alternatively, as shown in fig. 1, 4 and 5 (the housing 1 is not shown in fig. 5), the adjusting member 43 includes a bolt 431 and a nut 432:

the bolt 431 includes: the bolt 4311 and a nut 4312 connected to a first end of the bolt 4311, wherein the bolt 4311 is provided with an external thread; the nut 432 is provided with an internal thread matched with the external thread;

a third through hole 17 is formed in the housing 1, and the diameter of the third through hole 17 is smaller than the outer diameter of the nut 4312 and larger than or equal to the outer diameter of the stud 4311;

the first slider 41 is provided with a fourth through hole 412 and a groove 413 communicated with the fourth through hole 412;

the second end of the stud 4311 sequentially penetrates through the third through hole 17 and the fourth through hole 412 and is in threaded connection with the nut 432, the nut 432 is clamped in the groove 413, and the nut 4312 is erected on one side of the third through hole 17, which is far away from the first slider 41.

In an implementation, the second end of the bolt 431 sequentially penetrates through the third through hole 17 and the fourth through hole 412 and is screwed with the nut 432, wherein, since the diameter of the third through hole 17 is smaller than the outer diameter of the nut 4312, after the second end of the bolt 431 sequentially penetrates through the third through hole 17, the nut 4312 cannot penetrate through the third through hole 17, and thus is disposed on the side of the third through hole 17 away from the first slider 41.

In addition, the groove 413 matches the shape of the nut 432, for example: again hexagonal etc. so that the nut 432 cannot rotate relative to the recess 413. And the nut 4312 is exposed out of the housing 1 through the fifth through hole 15 of the housing 1, so that a user can extend the screwdriver into the fifth through hole 15 to rotatably adjust the nut 4312, at this time, the user rotates the nut 4312 to screw or unscrew the bolt 4311 with respect to the nut 432, so as to change a relative distance between the nut 432 and the nut 4312, the first direction C is an extending direction of the bolt 4311, and at this time, the first slider 41 moves back and forth along the first direction C under the transmission action of the nut 432.

Preferably, the first inclined surface 411 faces away from the nut 432, and the second inclined surface 421 faces toward the nut 432.

In practice, when the belt tensioner 100 is assembled in the belt transmission mechanism, the first roller 3 is under the pulling force of the transmission belt in the direction away from the U-shaped groove 2, so that the pulling force acts on the first inclined surface 411 of the first slider 41 under the driving action of the U-shaped groove 2 and the second slider 42, thereby generating a downward force on the first slider 41 in the direction away from the nut 4312.

Thus, when the user rotates the bolt 431 to move the first slider 41 downward as shown in fig. 2, the first slider 41 and the second slider 42 are returned by the tension of the belt.

Of course, in the implementation, the adjusting member may also be directly configured as a bolt screwed with the first slider 41, so that the first slider 41 is driven to move back and forth in the first direction C by adjusting the bolt by a user, and the structure of the adjusting member is not particularly limited herein.

Optionally, as shown in fig. 1 and 4, the belt tensioner 100 further comprises: the baffle 5, the inside of said body 1 also has neck 18;

the end of the baffle 5 is clamped in the clamping groove 18, so that the baffle 8 abuts against the first sliding block 41, and the first sliding block 41 is located between the baffle 18 and the second sliding block 42.

In implementation, the baffle 8 can provide a supporting force for the first sliding block 41 to prevent the first sliding block 41 from moving along the length direction of the limiting groove 11 under the extrusion of the second sliding block 42, so that the precision and reliability of tightness adjustment can be improved.

In implementation, the inner side of the housing 1 may be provided with two opposite clamping grooves 18, so as to respectively clamp the two opposite ends of the baffle 5 in the two clamping grooves 18, so as to improve the stability of the baffle 18, of course, the inner side of the housing 1 may also be provided with more than two clamping grooves arranged at intervals, where the number of the clamping grooves 18 is not specifically limited.

Of course, in addition to the above-described arrangement of the baffle 5 and the locking groove 18, in order to prevent the first slider 41 from moving in the longitudinal direction of the stopper groove 11 under the pressure of the second slider 42, the bolt 431 may be inserted through the two third through holes 17 that are provided to face each other in the first direction C and are spaced apart from each other, so that the bolt 431 cannot swing back and forth in the left-right direction with respect to the housing 1, and the first slider 41 may be prevented from moving in the longitudinal direction of the stopper groove 11 by the stopper action of the bolt 431.

The third through hole 17 and the bolt 431 have the same configuration as in the case of the above-described configuration in which the baffle 5 and the catching groove 18 are provided, but the functions of both are not the same. However, in view of the present embodiment, the number of the third through holes 17 is two, so that after the bolt 431 passes through the two third through holes 17, two support points are provided for the bolt 431 by the side walls of the two third through holes 17, and thus the bolt 431 is restrained from shaking. Thus, after the belt is installed, the tension of the belt acts on the first sliding block 41 through the first roller 3, the U-shaped groove 2 and the second sliding block 42, so that the first sliding block 41 is subjected to a downward pressure perpendicular to the first inclined surface, and the nut 4312 of the bolt 431 is tightly pressed against the side of the third through hole 17 away from the first sliding block 41. At this time, when the user rotates the bolt 431, the female screw of the nut 432 is rotated with respect to the female screw of the bolt 431, so that the nut 432 moves closer to or away from the nut 4312, and the first slider 41 is also moved closer to or away from the nut 4312 by the pushing of the nut 432, that is, the first slider can move only in the first direction C but cannot move in the longitudinal direction B of the stopper groove 11.

Alternatively, as shown in fig. 1 and 5, the first roller 3 includes: a synchronizing wheel 31, a shaft pin 32 axially penetrating the synchronizing wheel 31, a first ball bearing 33, a second ball bearing (not numbered), a first spacer 34, and a second spacer (not numbered);

the synchronizing wheel 31 is clamped between the first ball bearing 33 and the second ball bearing, and the first end of the shaft pin 32 penetrates through the first ball bearing 33 and is fixed in the first through hole 21 through the first gasket 34;

the second end of the axle pin 32 extends through the second ball bearing and is secured in the second through hole 22 by a second washer.

In an implementation, the shaft pin 32 is fixed in the first through hole 21 and the second through hole 22 by the first washer 34 and the second washer to be fixed between the two side walls of the U-shaped groove 2, and the synchronizing wheel 31 can rotate relative to the shaft pin 32 by the first ball bearing 33 and the second ball bearing 34.

Thus, the shaft pin 32 is stationary with respect to the U-shaped groove 2 while the timing wheel 31 is rotated by the belt.

Further, the first end of the shaft pin 32 penetrates through the first gasket 34, so that the first gasket 34 is in interference fit with the inner side wall of the first through hole 21 and the outer wall of the first end of the shaft pin 32 respectively;

the second end of the shaft pin 32 penetrates the second spacer 36, so that the second spacer is in interference fit with the inner sidewall of the second through hole 22 and the outer wall of the second end of the shaft pin 32, respectively.

In the present embodiment, the first pad 34 and the second pad may be pads having a certain elasticity, for example: rubber gasket, etc. so, can take place deformation through first gasket 34 and second gasket to with the outer wall of pivot 32, the inside wall of first through-hole 21 and the inside wall interference fit of second through-hole 22, thereby just can realize being fixed in the U-shaped groove with pivot 32 through simple assembly operation.

Of course, in implementation, the first gasket 34 and the second gasket may also be metal gaskets, and are not particularly limited herein.

Optionally, as shown in fig. 1, a strip through hole 19 is further formed in the housing 1, a length direction of the strip through hole 19 is parallel to a length direction of the limiting groove 11, wherein an end of the shaft pin 32 penetrates through the strip through hole 19 and is exposed out of the housing 1.

In practice, the length of the shaft pin 32 is not fixed, and often protrudes out of the outer side wall of the U-shaped groove 2. In the present embodiment, the belt tensioner 100 can be applied to the shaft pins 32 of various sizes by forming the strip-shaped through holes 19 in the housing 1, thereby increasing the application range of the belt tensioner 100.

Of course, in the embodiment, besides the strip-shaped through hole 19 is formed in the housing 1, the end of the shaft pin 32 protruding out of the U-shaped groove 2 can be located in the limiting groove 11 by recessing the groove bottom of the limiting groove 11 in the direction away from the first roller 3, which can also improve the application range of the belt tensioner 100.

The embodiment of the present application further provides a belt transmission mechanism, which includes the belt tensioner 100 provided in the previous embodiment.

In practice, the belt transmission mechanism includes at least a belt, and the belt is connected to the first roller 3 of the belt tensioner 100 to tension or loosen the belt when the belt tensioner 100 drives the first roller 3 to move.

In practical applications, the belt conveying mechanism may be a conveying mechanism in a 3D printing mechanism, such as: the conveying mechanism is used for driving the printing shaft to move, the printing shaft is fixedly connected with the belt, and when the belt is tensioned, the printing shaft is clamped in the annular belt and moves transversely, longitudinally or back and forth along with the rotation of the belt.

Further, the extending direction of the belt may be parallel to the extending direction of the limiting groove 11 in the belt tensioner 100.

In the embodiment of the application, the user is through actuating mechanism 4 among the regulation belt take-up unit 100 to order about the U-shaped groove and follow the length direction round trip movement of spacing groove, and then drive first gyro wheel is followed the length direction round trip movement of spacing groove changes the tensile distance of belt, can reach the effect of regulation belt elasticity.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A belt tensioner, comprising: the device comprises a shell, a U-shaped groove accommodated in the shell, a first roller arranged in the U-shaped groove and a driving mechanism positioned between the first roller and the bottom of the U-shaped groove;

the driving mechanism is connected with the shell;

2. The belt tensioner as in claim 1, wherein the drive mechanism comprises:

an adjusting member connecting the first slider and the housing;

3. The belt tensioner as in claim 2, wherein the adjustment member comprises a bolt and nut:

4. The belt tensioner of claim 3, wherein the first inclined surface faces away from the nut and the second inclined surface faces toward the nut.

5. The belt tensioner of claim 2, further comprising: the inner side of the shell is also provided with a clamping groove;

6. The belt tensioner of claim 1, wherein the first roller comprises: the synchronous wheel, a shaft pin penetrating through the synchronous wheel along the axial direction, a first ball bearing, a second ball bearing, a first gasket and a second gasket;

7. The belt tensioner of claim 6, wherein the first end of the axle pin extends through the first washer such that the first washer is in interference fit with an inner sidewall of the first through-hole and an outer wall of the first end of the axle pin, respectively;

8. The belt tensioner as claimed in claim 6, wherein the housing further comprises a through hole, the through hole having a length direction parallel to the length direction of the retaining groove, and wherein the end of the shaft pin passes through the through hole and is exposed from the housing.

9. The belt tensioner of claim 1, wherein the limit groove comprises a first limit groove and a second limit groove disposed opposite to each other, the housing comprises a front cover and a rear cover, the first limit groove is disposed on a side of the front cover facing the rear cover, and the second limit groove is disposed on a side of the rear cover facing the front cover;

10. A belt drive comprising a belt tensioner as claimed in any one of claims 1 to 9.