Belt tensioner

Abstract

The application discloses a belt tensioning device, aiming to provide a belt tensioning device which is easy to adjust tension and improve transmission efficiency. The application comprises a rack, a belt transmission assembly and a tensioning assembly are arranged on the rack, the belt transmission assembly has a transmission belt, the tensioning assembly comprises a linear guide rail, a working platform is slidably arranged on the linear guide rail, a rigid connecting assembly and a flexible connecting assembly are arranged on the working platform, two ends of the transmission belt are connected with the rigid connecting assembly and the flexible connecting assembly respectively, the flexible connecting assembly comprises a belt fixing seat, a supporting seat and a stud, the transmission belt is connected with the belt fixing seat, one end of the stud is connected with the belt fixing seat, and the other end of the stud penetrates through the supporting seat, an elastic force adjusting nut, a spring and a belt tension adjusting nut are connected with the stud, and the belt tension adjusting nut, the supporting seat, the spring, the elastic force adjusting nut and the belt fixing seat are sequentially arranged along the length direction of the stud. The application is applied to the technical field of belt tensioning devices.

Description

TECHNICAL FIELD

[0001] The present application relates to a belt tensioning device. BACKGROUND

[0002] In a belt drive system, the belt is wrapped around the driving wheel and the driven wheel, but the belt tensioning condition may change with the load change, so it is necessary to achieve the technical requirements of the belt tensioning force by tensioning to ensure the normal operation of the belt. The traditional tensioning method of the belt drive is mainly achieved by changing the installation spacing between the driving wheel and the driven wheel of the belt, but this tensioning method will cause the constant tension of the belt, and when the load is encountered, the belt will be deformed to make the tension smaller, resulting in belt slip, and this method needs to disassemble the mounting seat of the driving wheel or the driven wheel, and then connect the belt. Due to the limited space of the vehicle-mounted equipment, the installation and replacement of the belt are relatively complex, and the belt tensioning process requires a certain tensioning force, which cannot meet the needs of the tensioning force through direct manual adjustment, and the tensioning adjustment process is relatively complex. When adjusting, if the belt tensioning is too large, it will reduce the service life and produce noise; if the tension is too small, it may cause the belt to jump out of the pulley groove or the belt to slip due to the starting torque or impact load, and there are difficult conditions. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a belt tensioning device which is easy to adjust the tension and improve the transmission efficiency.

[0004] The technical scheme adopted by the present application is: the present application comprises a rack, the rack is provided with a belt drive assembly and a tensioning assembly, the belt drive assembly has a transmission belt, the tensioning assembly comprises a linear guide rail, a working platform slides on the linear guide rail, the working platform is provided with a rigid connection assembly and a flexible connection assembly, both ends of the transmission belt are connected with the rigid connection assembly and the flexible connection assembly respectively, the flexible connection assembly comprises a belt fixing seat, a supporting seat and a stud, the transmission belt is connected on the belt fixing seat, one end of the stud is connected on the belt fixing seat, and the other end penetrates through the supporting seat, the stud is connected with an elastic force adjusting nut, a spring and a belt tension adjusting nut, the belt tension adjusting nut, the supporting seat, the spring, the elastic force adjusting nut and the belt fixing seat are sequentially arranged along the length direction of the stud.

[0005] Further, the flexible connection assembly further comprises a detection assembly, the detection assembly comprises a sensor fixing plate and a travel switch, the sensor fixing plate is arranged on the supporting seat, and the travel switch is arranged on the sensor fixing plate and abuts against the belt fixing seat.

[0006] Further, a lock nut is connected to the stud, and the lock nut abuts against the belt tension adjusting nut.

[0007] Further, a posture fixing pin is connected between the belt fixing seat and the support seat.

[0008] Further, the posture fixing pin is located below the stud.

[0009] Further, the belt fixing seat comprises a fixing base, a belt fixing pin and a first pressing plate are arranged on the fixing base, the first pressing plate is locked on the fixing base by a screw, and the transmission belt is pressed between the first pressing plate and the fixing base after winding around the belt fixing pin.

[0010] Further, the rigid connecting assembly comprises a connecting seat, a second pressing plate is connected to the lower end of the connecting seat, and the transmission belt is pressed between the connecting seat and the second pressing plate.

[0011] Further, the belt transmission assembly comprises a driving assembly and a driven assembly, and the driving assembly and the driven assembly are both in transmission with the transmission belt.

[0012] Further, the driving assembly comprises a motor fixing frame, a first bearing seat and a first synchronous wheel, a first rotating shaft is arranged on the first bearing seat in a matched mode, a motor is arranged on the motor fixing frame, the motor is connected with the first rotating shaft through a shaft coupling, the first synchronous wheel is connected to the first rotating shaft, and the first synchronous wheel is in transmission with the transmission belt.

[0013] Further, the driven assembly comprises a second bearing seat and a second synchronous wheel, a second rotating shaft is arranged on the second bearing seat in a matched mode, the second synchronous wheel is connected to the second rotating shaft, and the second synchronous wheel is in transmission with the transmission belt.

[0014] The present application has the following advantages:

[0015] Compared with the prior art, by arranging the belt tensioning device, only the belt tension adjusting nut needs to be adjusted to adjust the tension of the transmission belt, which is easy to operate and can ensure the tensioning effect, so as to avoid the situation that the service life of the transmission belt is reduced and noise is generated due to the excessive tensioning of the transmission belt, and the situation that the belt jumps out of the pulley groove or the belt slips due to the insufficient tension of the transmission belt, thereby improving the transmission efficiency, so that the present application has the advantages of easy tension adjustment and improved transmission efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from the structures shown in the drawings without any creative effort.

[0017] Figure 1 is a schematic diagram of the three-dimensional structure of the present application;

[0018] Figure 2 is a partial enlarged schematic diagram of part A of Figure 1 ;

[0019] Figure 3 is a schematic diagram of the plane structure of the partial structure of the present application Figure 1 ;

[0020] Figure 4 is a schematic diagram of the plane structure of the partial structure of the present application Figure 2 ;

[0021] Figure 5 is a schematic diagram of the plane structure of the driving assembly of the present application;

[0022] Figure 6 is a schematic diagram of the plane structure of the driven assembly of the present application.

[0023] The reference signs are as follows:

[0024] 1, rack; 2, transmission belt; 3, linear guide rail; 5, working platform; 6, rigid connecting assembly; 7, flexible connecting assembly; 8, belt fixing seat; 9, supporting seat; 10, stud; 11, elastic force adjusting nut; 12, spring; 13, belt tension adjusting nut; 15, detection assembly; 16, sensor fixing plate; 17, travel switch; 18, lock nut; 19, posture fixing pin; 20, fixed base; 21, belt fixing pin; 22, first pressing plate; 23, connecting seat; 25, second pressing plate; 26, driving assembly; 27, driven assembly; 28, motor fixing frame; 29, first bearing seat; 30, first synchronous wheel; 31, first rotating shaft; 32, motor; 33, shaft coupling; 35, second bearing seat; 36, second synchronous wheel; 37, second rotating shaft.

[0025] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0026] Clearly, the embodiments described are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of the present application.

[0027] It should be noted that all directional indications, such as upper, lower, left, right, front, back, clockwise, counterclockwise, etc., in the embodiments of the present application are used only to explain the relative position relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0028] In addition, the descriptions involving "first", "second", etc. in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of a person of ordinary skill in the art, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0029] As shown in Figures 1 to 4 In the present embodiment, the present application comprises a rack 1, a belt transmission assembly and a tensioning assembly are arranged on the rack 1, the belt transmission assembly has a transmission belt 2, the tensioning assembly comprises a linear guide rail 3, a working platform 5 is slidably arranged on the linear guide rail 3, a rigid connection assembly 6 and a flexible connection assembly 7 are arranged on the working platform 5, two ends of the transmission belt 2 are connected with the rigid connection assembly 6 and the flexible connection assembly 7 respectively, the flexible connection assembly 7 comprises a belt fixing seat 8, a support seat 9 and a stud 10, the transmission belt 2 is connected on the belt fixing seat 8, one end of the stud 10 is connected on the belt fixing seat 8, and the other end penetrates through the support seat 9, a spring force adjusting nut 11, a spring 12 and a belt tension adjusting nut 13 are connected on the stud 10, the belt tension adjusting nut 13, the support seat 9, the spring 12, the spring force adjusting nut 11 and the belt fixing seat 8 are sequentially arranged along the length direction of the stud 10.

[0030] It needs to be explained that the transmission belt 2 provides power for the working platform 5, the linear guide rail 3 maintains the movement direction of the transmission belt 2 and provides a stable linear movement pair for the working platform 5; the two ends of the transmission belt 2 are connected on the rigid connection assembly 6 and the belt fixing seat 8 respectively; the support seat 9 is connected with the belt fixing seat 8 through the stud 10, the spring 12 is arranged between the support seat 9 and the belt fixing seat 8, and the spring force of the spring 12 is adjusted through the spring force adjusting nut 11; the support seat 9 is connected with the spring 12 and can move relative to the stud 10 between the spring 12 and the belt tension adjusting nut 13.

[0031] Compared with the prior art, in the present application, during the movement, when the transmission belt 2 has insufficient tensioning force, resulting in the total length of the transmission belt 2 increasing, and reaching a state that the spring 12 cannot adjust, at this time, the spring 12 is stretched due to the deformation amount of the transmission belt 2 increasing, and the distance between the support seat 9 and the belt fixing seat 8 increases, the belt tension adjusting nut 13 is adjusted to reduce the distance between the support seat 9 and the belt fixing seat 8, so that the transmission belt 2 can be adjusted to the best tension, therefore, through the setting of the belt tensioning device of the present application, only the belt tension adjusting nut 13 needs to be adjusted to adjust the tensioning of the transmission belt 2, which is easy to operate and can ensure the tensioning effect, so as to avoid the situation that the transmission belt 2 has excessive tensioning, which reduces the service life and produces noise, and avoid the situation that the transmission belt 2 has insufficient tension, which causes the belt to jump out of the pulley groove or the belt to slip, thereby improving the transmission efficiency, so that the present application has the advantages of easy tension adjustment and improved transmission efficiency.

[0032] As shown in Figures 1 to 4 In some embodiments, the flexible connection assembly 7 further comprises a detection assembly 15, the detection assembly 15 comprises a sensor fixing plate 16 and a travel switch 17, the sensor fixing plate 16 is arranged on the support seat 9, and the travel switch 17 is arranged on the sensor fixing plate 16 and abuts against the belt fixing seat 8. Among them, the baffle of the travel switch 17 is in contact with the side surface of the belt fixing seat 8 to be in the triggered state. Specifically, when the spring 12 is stretched due to the deformation amount of the transmission belt 2 increasing, and the distance between the support seat 9 and the belt fixing seat 8 increases, at this time, the travel switch 17 moves with the support seat 9 away from the belt fixing seat 8, so that the baffle of the travel switch 17 moves away from the side surface of the belt fixing seat 8, causing the contact of the travel switch 17 to be disconnected to feedback the signal, thereby issuing a warning, so as to intervene artificially and adjust the tension of the transmission belt 2, so that the belt tensioning device can automatically identify and issue an alarm when the tension is insufficient.

[0033] As shown in Figure 2 and Figure 3As shown in the figure, in some embodiments, a lock nut 18 is further connected on the stud 10, which abuts against the belt tension adjusting nut 13; a posture fixing pin 19 is connected between the belt fixing seat 8 and the support seat 9; the posture fixing pin 19 is located below the stud 10. Specifically, the belt tension adjusting nut 13 is locked by the lock nut 18, so as to avoid loosening of the belt tension adjusting nut 13 and affect the tension of the transmission belt 2; in addition, the posture of the belt fixing seat 8 and the support seat 9 is maintained by the posture fixing pin 19.

[0034] As shown in the figure, Figure 2 and Figure 3 As shown in the figure, in some embodiments, the belt fixing seat 8 comprises a fixed base 20, the fixed base 20 is provided with a belt fixing pin 21 and a first pressing plate 22, the first pressing plate 22 is locked on the fixed base 20 by a screw, and the transmission belt 2 is wound around the belt fixing pin 21 and pressed between the first pressing plate 22 and the fixed base 20. Specifically, one end of the transmission belt 2 is wound around the belt fixing pin 21 once, and then locked on the fixed base 20 by the first pressing plate 22 with a screw, which not only helps the transmission belt 2 not to slip during movement, but also has certain stability after the screw on the first pressing plate 22 is loosened.

[0035] As shown in the figure, Figure 3 As shown in the figure, in some embodiments, the rigid connection assembly 6 comprises a connecting seat 23, the lower end of the connecting seat 23 is connected with a second pressing plate 25, and the transmission belt 2 is pressed between the connecting seat 23 and the second pressing plate 25. Specifically, the transmission belt 2 is pressed between the connecting seat 23 and the second pressing plate 25, so as to stably fix the transmission belt 2.

[0036] As shown in the figure, Figure 1 , Figure 5 and Figure 6 As shown in the figure, in some embodiments, the belt transmission assembly comprises a driving assembly 26 and a driven assembly 27, and the driving assembly 26 and the driven assembly 27 are both in transmission with the transmission belt 2.

[0037] As shown in the figure, Figure 5As shown, in some embodiments, the driving assembly 26 comprises a motor fixing frame 28, a first bearing seat 29, a first synchronous wheel 30, a first rotating shaft 31 matched and arranged on the first bearing seat 29, a motor 32 arranged on the motor fixing frame 28, a shaft coupling 33 connecting the motor 32 with the first rotating shaft 31, and the first synchronous wheel 30 connected on the first rotating shaft 31 and in transmission with the transmission belt 2. The first rotating shaft 31 is fixedly connected with a first clamping spring. Specifically, the motor 32 provides power to control the movement state of the transmission belt 2, the shaft coupling 33 connects the output shaft of the motor 32 with the first rotating shaft 31 and transmits movement and torque to provide power for the whole mechanism.

[0038] As shown, Figure 6 In some embodiments, the driven assembly 27 comprises a second bearing seat 35 and a second synchronous wheel 36, the second bearing seat 35 is matched and arranged with a second rotating shaft 37, the second synchronous wheel 36 is connected on the second rotating shaft 37, and the second synchronous wheel 36 is in transmission with the transmission belt 2. The second rotating shaft 37 is fixedly connected with a second clamping spring, the second synchronous wheel 36 is connected on the second rotating shaft 37, the second bearing seat 35 passes through the outer ring of the fixed bearing to make the second rotating shaft 37 fixed on the inner ring rotate, and the outer ring remains stationary and always consistent with the direction of transmission (such as the direction of motor operation). Specifically, the second synchronous wheel 36 is used to transmit with the transmission belt 2, and through the combination of the rack and the gear slot, the power and movement are transmitted, aiming to ensure accurate movement transmission, so that the transmission system can work in a reliable and accurate manner.

[0039] The belt tensioning device of the present application uses the spring 12 to adjust the tension of the transmission belt 2, and detects the tension of the transmission belt 2 through the detection assembly 15. When the tension of the transmission belt 2 becomes smaller and reaches a state that the spring 12 cannot adjust, the detection assembly 15 sends feedback and alarm to stop the driving of the driving assembly 26, so that the belt tensioning device can not only adjust the tension of the transmission belt 2, but also prevent the transmission belt 2 from jumping out of the pulley groove or slipping due to abnormal tension of the transmission belt 2.

[0040] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation made according to the content of the present application specification and drawings, or direct / indirect application in other related technical fields within the inventive concept of the present application is included in the patent protection scope of the present application.

Claims

1. A belt tensioning device, characterized in that: The invention relates to a machine frame (1), wherein a belt transmission assembly and a tensioning assembly are provided on the machine frame (1), wherein the belt transmission assembly has a transmission belt (2), wherein the tensioning assembly comprises a linear guide rail (3), wherein a working platform (5) slides on the linear guide rail (3), wherein a rigid connection assembly (6) and a flexible connection assembly (7) are provided on the working platform (5), wherein two ends of the transmission belt (2) are respectively connected to the rigid connection assembly (6) and the flexible connection assembly (7), wherein the flexible connection assembly (7) comprises a belt fixing seat (8), a support seat (9) and a stud (10), wherein the transmission belt (2) is connected to the belt fixing seat (8), wherein one end of the stud (10) is connected to the belt fixing seat (8), and the other end passes through the support seat (9), the stud (10) is connected with an elastic force adjustment nut (11), a spring (12) and a belt tension adjustment nut (13), and the belt tension adjustment nut (13), the support seat (9), the spring (12), the elastic force adjustment nut (11) and the belt fixing seat (8) are arranged in sequence along the length direction of the stud (10); the belt fixing seat (8) includes a fixed base (20), and the fixed base (20) is provided with a belt fixing pin (21) and a first pressure plate (22), the first pressure plate (22) is screwed to the fixed base (20), and the transmission belt (2) is wound around the belt fixing pin (21) and then pressed between the first pressure plate (22) and the fixed base (20).

2. A belt tensioning device according to claim 1, characterized in that: The flexible connection assembly (7) further includes a detection assembly (15), the detection assembly (15) including a sensor fixing plate (16) and a travel switch (17), the sensor fixing plate (16) being arranged on the support seat (9), and the travel switch (17) being arranged on the sensor fixing plate (16) and abutting against the belt fixing seat (8).

3. A belt tensioning device according to claim 1 or 2, characterized in that: The stud (10) is also connected to a locking nut (18), and the locking nut (18) abuts against the belt tension adjustment nut (13).

4. A belt tensioning device according to claim 3, characterized in that: A posture fixing pin (19) is connected between the belt fixing seat (8) and the support seat (9).

5. The belt tensioning device according to claim 4, characterized in that: The posture fixing pin (19) is located below the stud (10).

6. The belt tensioning device according to claim 1, characterized in that: The rigid connection assembly (6) includes a connection seat (23), the lower end of the connection seat (23) is connected to a second pressure plate (25), and the transmission belt (2) is pressed between the connection seat (23) and the second pressure plate (25).

7. The belt tensioning device according to claim 1, characterized in that: The belt transmission assembly comprises a driving assembly (26) and a driven assembly (27), and both the driving assembly (26) and the driven assembly (27) are driven by the transmission belt (2).

8. The belt tensioning device according to claim 7, characterized in that: The driving assembly (26) includes a motor fixing frame (28), a first bearing seat (29) and a first synchronous wheel (30), wherein the first bearing seat (29) is provided with a first rotating shaft (31), the motor fixing frame (28) is provided with a motor (32), the motor (32) is connected to the first rotating shaft (31) through a coupling (33), the first synchronous wheel (30) is connected to the first rotating shaft (31), and the first synchronous wheel (30) is driven by the transmission belt (2).

9. The belt tensioning device according to claim 7, characterized in that: The driven assembly (27) includes a second bearing seat (35) and a second synchronous wheel (36), the second bearing seat (35) is provided with a second rotating shaft (37), the second synchronous wheel (36) is connected to the second rotating shaft (37), and the second synchronous wheel (36) is driven by the transmission belt (2).

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